diff options
Diffstat (limited to 'src/db')
94 files changed, 9426 insertions, 448 deletions
diff --git a/src/db/Configured.cxx b/src/db/Configured.cxx new file mode 100644 index 000000000..625300d75 --- /dev/null +++ b/src/db/Configured.cxx @@ -0,0 +1,72 @@ +/* + * Copyright (C) 2003-2014 The Music Player Daemon Project + * http://www.musicpd.org + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#include "config.h" +#include "Configured.hxx" +#include "DatabaseGlue.hxx" +#include "config/ConfigGlobal.hxx" +#include "config/ConfigData.hxx" +#include "config/ConfigError.hxx" +#include "fs/AllocatedPath.hxx" +#include "fs/StandardDirectory.hxx" +#include "util/Error.hxx" +#include "Log.hxx" + +Database * +CreateConfiguredDatabase(EventLoop &loop, DatabaseListener &listener, + Error &error) +{ + const struct config_param *param = config_get_param(CONF_DATABASE); + const struct config_param *path = config_get_param(CONF_DB_FILE); + + if (param != nullptr && path != nullptr) { + error.Format(config_domain, + "Found both 'database' (line %d) and 'db_file' (line %d) setting", + param->line, path->line); + return nullptr; + } + + struct config_param *allocated = nullptr; + + if (param == nullptr && path != nullptr) { + allocated = new config_param("database", path->line); + allocated->AddBlockParam("path", path->value.c_str(), + path->line); + param = allocated; + } + + if (param == nullptr) { + /* if there is no override, use the cache directory */ + + const AllocatedPath cache_dir = GetUserCacheDir(); + if (cache_dir.IsNull()) + return nullptr; + + const auto db_file = AllocatedPath::Build(cache_dir, "mpd.db"); + + allocated = new config_param("database"); + allocated->AddBlockParam("path", db_file.c_str(), -1); + param = allocated; + } + + Database *db = DatabaseGlobalInit(loop, listener, *param, + error); + delete allocated; + return db; +} diff --git a/src/db/Configured.hxx b/src/db/Configured.hxx new file mode 100644 index 000000000..5d25b701c --- /dev/null +++ b/src/db/Configured.hxx @@ -0,0 +1,39 @@ +/* + * Copyright (C) 2003-2014 The Music Player Daemon Project + * http://www.musicpd.org + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#ifndef MPD_DB_CONFIG_HXX +#define MPD_DB_CONFIG_HXX + +#include "check.h" + +class EventLoop; +class DatabaseListener; +class Database; +class Error; + +/** + * Read database configuration settings and create a #Database + * instance from it, but do not open it. Returns nullptr on error or + * if no database is configured (no #Error set in that case). + */ +Database * +CreateConfiguredDatabase(EventLoop &loop, DatabaseListener &listener, + Error &error); + +#endif diff --git a/src/db/Count.cxx b/src/db/Count.cxx new file mode 100644 index 000000000..4fd53a73b --- /dev/null +++ b/src/db/Count.cxx @@ -0,0 +1,145 @@ +/* + * Copyright (C) 2003-2014 The Music Player Daemon Project + * http://www.musicpd.org + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#include "config.h" +#include "Count.hxx" +#include "Selection.hxx" +#include "Interface.hxx" +#include "client/Client.hxx" +#include "LightSong.hxx" +#include "tag/Set.hxx" + +#include <functional> +#include <map> + +struct SearchStats { + unsigned n_songs; + unsigned long total_time_s; + + constexpr SearchStats() + :n_songs(0), total_time_s(0) {} +}; + +class TagCountMap : public std::map<std::string, SearchStats> { +}; + +static void +PrintSearchStats(Client &client, const SearchStats &stats) +{ + client_printf(client, + "songs: %u\n" + "playtime: %lu\n", + stats.n_songs, stats.total_time_s); +} + +static void +Print(Client &client, TagType group, const TagCountMap &m) +{ + assert(unsigned(group) < TAG_NUM_OF_ITEM_TYPES); + + for (const auto &i : m) { + client_printf(client, "%s: %s\n", + tag_item_names[group], i.first.c_str()); + PrintSearchStats(client, i.second); + } +} + +static bool +stats_visitor_song(SearchStats &stats, const LightSong &song) +{ + stats.n_songs++; + stats.total_time_s += song.GetDuration(); + + return true; +} + +static bool +CollectGroupCounts(TagCountMap &map, TagType group, const Tag &tag) +{ + bool found = false; + for (const auto &item : tag) { + if (item.type == group) { + auto r = map.insert(std::make_pair(item.value, + SearchStats())); + SearchStats &s = r.first->second; + ++s.n_songs; + if (tag.time > 0) + s.total_time_s += tag.time; + + found = true; + } + } + + return found; +} + +static bool +GroupCountVisitor(TagCountMap &map, TagType group, const LightSong &song) +{ + assert(song.tag != nullptr); + + const Tag &tag = *song.tag; + if (!CollectGroupCounts(map, group, tag) && group == TAG_ALBUM_ARTIST) + /* fall back to "Artist" if no "AlbumArtist" was found */ + CollectGroupCounts(map, TAG_ARTIST, tag); + + return true; +} + +bool +PrintSongCount(Client &client, const char *name, + const SongFilter *filter, + TagType group, + Error &error) +{ + const Database *db = client.GetDatabase(error); + if (db == nullptr) + return false; + + const DatabaseSelection selection(name, true, filter); + + if (group == TAG_NUM_OF_ITEM_TYPES) { + /* no grouping */ + + SearchStats stats; + + using namespace std::placeholders; + const auto f = std::bind(stats_visitor_song, std::ref(stats), + _1); + if (!db->Visit(selection, f, error)) + return false; + + PrintSearchStats(client, stats); + } else { + /* group by the specified tag: store counts in a + std::map */ + + TagCountMap map; + + using namespace std::placeholders; + const auto f = std::bind(GroupCountVisitor, std::ref(map), + group, _1); + if (!db->Visit(selection, f, error)) + return false; + + Print(client, group, map); + } + + return true; +} diff --git a/src/db/Count.hxx b/src/db/Count.hxx new file mode 100644 index 000000000..d22a3210d --- /dev/null +++ b/src/db/Count.hxx @@ -0,0 +1,39 @@ +/* + * Copyright (C) 2003-2014 The Music Player Daemon Project + * http://www.musicpd.org + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#ifndef MPD_DB_COUNT_HXX +#define MPD_DB_COUNT_HXX + +#include "Compiler.h" + +#include <stdint.h> + +enum TagType : uint8_t; +class Client; +class SongFilter; +class Error; + +gcc_nonnull(2) +bool +PrintSongCount(Client &client, const char *name, + const SongFilter *filter, + TagType group, + Error &error); + +#endif diff --git a/src/db/DatabaseError.cxx b/src/db/DatabaseError.cxx new file mode 100644 index 000000000..e0cbdd6a3 --- /dev/null +++ b/src/db/DatabaseError.cxx @@ -0,0 +1,24 @@ +/* + * Copyright (C) 2003-2014 The Music Player Daemon Project + * http://www.musicpd.org + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#include "config.h" +#include "DatabaseError.hxx" +#include "util/Domain.hxx" + +const Domain db_domain("db"); diff --git a/src/db/DatabaseError.hxx b/src/db/DatabaseError.hxx new file mode 100644 index 000000000..c71bbdfff --- /dev/null +++ b/src/db/DatabaseError.hxx @@ -0,0 +1,39 @@ +/* + * Copyright (C) 2003-2014 The Music Player Daemon Project + * http://www.musicpd.org + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#ifndef MPD_DB_ERROR_HXX +#define MPD_DB_ERROR_HXX + +class Domain; + +enum db_error { + /** + * The database is disabled, i.e. none is configured in this + * MPD instance. + */ + DB_DISABLED, + + DB_NOT_FOUND, + + DB_CONFLICT, +}; + +extern const Domain db_domain; + +#endif diff --git a/src/db/DatabaseGlue.cxx b/src/db/DatabaseGlue.cxx new file mode 100644 index 000000000..ade5c95f3 --- /dev/null +++ b/src/db/DatabaseGlue.cxx @@ -0,0 +1,45 @@ +/* + * Copyright (C) 2003-2014 The Music Player Daemon Project + * http://www.musicpd.org + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#include "config.h" +#include "DatabaseGlue.hxx" +#include "Registry.hxx" +#include "DatabaseError.hxx" +#include "util/Error.hxx" +#include "config/ConfigData.hxx" +#include "DatabasePlugin.hxx" + +#include <string.h> + +Database * +DatabaseGlobalInit(EventLoop &loop, DatabaseListener &listener, + const config_param ¶m, Error &error) +{ + const char *plugin_name = + param.GetBlockValue("plugin", "simple"); + + const DatabasePlugin *plugin = GetDatabasePluginByName(plugin_name); + if (plugin == nullptr) { + error.Format(db_domain, + "No such database plugin: %s", plugin_name); + return nullptr; + } + + return plugin->create(loop, listener, param, error); +} diff --git a/src/db/DatabaseGlue.hxx b/src/db/DatabaseGlue.hxx new file mode 100644 index 000000000..70b50def3 --- /dev/null +++ b/src/db/DatabaseGlue.hxx @@ -0,0 +1,40 @@ +/* + * Copyright (C) 2003-2014 The Music Player Daemon Project + * http://www.musicpd.org + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#ifndef MPD_DATABASE_GLUE_HXX +#define MPD_DATABASE_GLUE_HXX + +#include "Compiler.h" + +struct config_param; +class EventLoop; +class DatabaseListener; +class Database; +class Error; + +/** + * Initialize the database library. + * + * @param param the database configuration block + */ +Database * +DatabaseGlobalInit(EventLoop &loop, DatabaseListener &listener, + const config_param ¶m, Error &error); + +#endif diff --git a/src/db/DatabaseListener.hxx b/src/db/DatabaseListener.hxx new file mode 100644 index 000000000..8b410c2f5 --- /dev/null +++ b/src/db/DatabaseListener.hxx @@ -0,0 +1,46 @@ +/* + * Copyright (C) 2003-2014 The Music Player Daemon Project + * http://www.musicpd.org + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#ifndef MPD_DATABASE_CLIENT_HXX +#define MPD_DATABASE_CLIENT_HXX + +struct LightSong; + +/** + * An object that listens to events from the #Database. + * + * @see #Instance + */ +class DatabaseListener { +public: + /** + * The database has been modified. This must be called in the + * thread that has created the #Database instance and that + * runs the #EventLoop. + */ + virtual void OnDatabaseModified() = 0; + + /** + * During database update, a song is about to be removed from + * the database because the file has disappeared. + */ + virtual void OnDatabaseSongRemoved(const LightSong &song) = 0; +}; + +#endif diff --git a/src/db/DatabaseLock.cxx b/src/db/DatabaseLock.cxx new file mode 100644 index 000000000..c0b5e4844 --- /dev/null +++ b/src/db/DatabaseLock.cxx @@ -0,0 +1,27 @@ +/* + * Copyright (C) 2003-2014 The Music Player Daemon Project + * http://www.musicpd.org + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#include "config.h" +#include "DatabaseLock.hxx" + +Mutex db_mutex; + +#ifndef NDEBUG +ThreadId db_mutex_holder; +#endif diff --git a/src/db/DatabaseLock.hxx b/src/db/DatabaseLock.hxx new file mode 100644 index 000000000..9d0b0c152 --- /dev/null +++ b/src/db/DatabaseLock.hxx @@ -0,0 +1,97 @@ +/* + * Copyright (C) 2003-2014 The Music Player Daemon Project + * http://www.musicpd.org + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +/** \file + * + * Support for locking data structures from the database, for safe + * multi-threading. + */ + +#ifndef MPD_DB_LOCK_HXX +#define MPD_DB_LOCK_HXX + +#include "check.h" +#include "thread/Mutex.hxx" +#include "Compiler.h" + +#include <assert.h> + +extern Mutex db_mutex; + +#ifndef NDEBUG + +#include "thread/Id.hxx" + +extern ThreadId db_mutex_holder; + +/** + * Does the current thread hold the database lock? + */ +gcc_pure +static inline bool +holding_db_lock(void) +{ + return db_mutex_holder.IsInside(); +} + +#endif + +/** + * Obtain the global database lock. This is needed before + * dereferencing a #song or #directory. It is not recursive. + */ +static inline void +db_lock(void) +{ + assert(!holding_db_lock()); + + db_mutex.lock(); + + assert(db_mutex_holder.IsNull()); +#ifndef NDEBUG + db_mutex_holder = ThreadId::GetCurrent(); +#endif +} + +/** + * Release the global database lock. + */ +static inline void +db_unlock(void) +{ + assert(holding_db_lock()); +#ifndef NDEBUG + db_mutex_holder = ThreadId::Null(); +#endif + + db_mutex.unlock(); +} + +class ScopeDatabaseLock { +public: + ScopeDatabaseLock() { + db_lock(); + } + + ~ScopeDatabaseLock() { + db_unlock(); + } +}; + +#endif diff --git a/src/db/DatabasePlaylist.cxx b/src/db/DatabasePlaylist.cxx new file mode 100644 index 000000000..f1cfdc874 --- /dev/null +++ b/src/db/DatabasePlaylist.cxx @@ -0,0 +1,52 @@ +/* + * Copyright (C) 2003-2014 The Music Player Daemon Project + * http://www.musicpd.org + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#include "config.h" +#include "DatabasePlaylist.hxx" +#include "DatabaseSong.hxx" +#include "Selection.hxx" +#include "PlaylistFile.hxx" +#include "Interface.hxx" +#include "DetachedSong.hxx" +#include "storage/StorageInterface.hxx" + +#include <functional> + +static bool +AddSong(const Storage &storage, const char *playlist_path_utf8, + const LightSong &song, Error &error) +{ + return spl_append_song(playlist_path_utf8, + DatabaseDetachSong(storage, song), + error); +} + +bool +search_add_to_playlist(const Database &db, const Storage &storage, + const char *uri, const char *playlist_path_utf8, + const SongFilter *filter, + Error &error) +{ + const DatabaseSelection selection(uri, true, filter); + + using namespace std::placeholders; + const auto f = std::bind(AddSong, std::ref(storage), + playlist_path_utf8, _1, _2); + return db.Visit(selection, f, error); +} diff --git a/src/db/DatabasePlaylist.hxx b/src/db/DatabasePlaylist.hxx new file mode 100644 index 000000000..9dc3526bb --- /dev/null +++ b/src/db/DatabasePlaylist.hxx @@ -0,0 +1,37 @@ +/* + * Copyright (C) 2003-2014 The Music Player Daemon Project + * http://www.musicpd.org + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#ifndef MPD_DATABASE_PLAYLIST_HXX +#define MPD_DATABASE_PLAYLIST_HXX + +#include "Compiler.h" + +class Database; +class Storage; +class SongFilter; +class Error; + +gcc_nonnull(3,4) +bool +search_add_to_playlist(const Database &db, const Storage &storage, + const char *uri, const char *path_utf8, + const SongFilter *filter, + Error &error); + +#endif diff --git a/src/db/DatabasePlugin.hxx b/src/db/DatabasePlugin.hxx new file mode 100644 index 000000000..831101786 --- /dev/null +++ b/src/db/DatabasePlugin.hxx @@ -0,0 +1,58 @@ +/* + * Copyright (C) 2003-2014 The Music Player Daemon Project + * http://www.musicpd.org + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +/** \file + * + * This header declares the db_plugin class. It describes a + * plugin API for databases of song metadata. + */ + +#ifndef MPD_DATABASE_PLUGIN_HXX +#define MPD_DATABASE_PLUGIN_HXX + +struct config_param; +class Error; +class EventLoop; +class DatabaseListener; +class Database; + +struct DatabasePlugin { + /** + * This plugin requires a #Storage instance. It contains only + * cached metadata from files in the #Storage. + */ + static constexpr unsigned FLAG_REQUIRE_STORAGE = 0x1; + + const char *name; + + unsigned flags; + + /** + * Allocates and configures a database. + */ + Database *(*create)(EventLoop &loop, DatabaseListener &listener, + const config_param ¶m, + Error &error); + + constexpr bool RequireStorage() const { + return flags & FLAG_REQUIRE_STORAGE; + } +}; + +#endif diff --git a/src/db/DatabasePrint.cxx b/src/db/DatabasePrint.cxx new file mode 100644 index 000000000..498aedf97 --- /dev/null +++ b/src/db/DatabasePrint.cxx @@ -0,0 +1,221 @@ +/* + * Copyright (C) 2003-2014 The Music Player Daemon Project + * http://www.musicpd.org + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#include "config.h" +#include "DatabasePrint.hxx" +#include "Selection.hxx" +#include "SongFilter.hxx" +#include "SongPrint.hxx" +#include "TimePrint.hxx" +#include "client/Client.hxx" +#include "tag/Tag.hxx" +#include "LightSong.hxx" +#include "LightDirectory.hxx" +#include "PlaylistInfo.hxx" +#include "Interface.hxx" +#include "fs/Traits.hxx" + +#include <functional> + +static const char * +ApplyBaseFlag(const char *uri, bool base) +{ + if (base) + uri = PathTraitsUTF8::GetBase(uri); + return uri; +} + +static void +PrintDirectoryURI(Client &client, bool base, const LightDirectory &directory) +{ + client_printf(client, "directory: %s\n", + ApplyBaseFlag(directory.GetPath(), base)); +} + +static bool +PrintDirectoryBrief(Client &client, bool base, const LightDirectory &directory) +{ + if (!directory.IsRoot()) + PrintDirectoryURI(client, base, directory); + + return true; +} + +static bool +PrintDirectoryFull(Client &client, bool base, const LightDirectory &directory) +{ + if (!directory.IsRoot()) { + PrintDirectoryURI(client, base, directory); + + if (directory.mtime > 0) + time_print(client, "Last-Modified", directory.mtime); + } + + return true; +} + +static void +print_playlist_in_directory(Client &client, bool base, + const char *directory, + const char *name_utf8) +{ + if (base || directory == nullptr) + client_printf(client, "playlist: %s\n", + ApplyBaseFlag(name_utf8, base)); + else + client_printf(client, "playlist: %s/%s\n", + directory, name_utf8); +} + +static void +print_playlist_in_directory(Client &client, bool base, + const LightDirectory *directory, + const char *name_utf8) +{ + if (base || directory == nullptr || directory->IsRoot()) + client_printf(client, "playlist: %s\n", name_utf8); + else + client_printf(client, "playlist: %s/%s\n", + directory->GetPath(), name_utf8); +} + +static bool +PrintSongBrief(Client &client, bool base, const LightSong &song) +{ + song_print_uri(client, song, base); + + if (song.tag->has_playlist) + /* this song file has an embedded CUE sheet */ + print_playlist_in_directory(client, base, + song.directory, song.uri); + + return true; +} + +static bool +PrintSongFull(Client &client, bool base, const LightSong &song) +{ + song_print_info(client, song, base); + + if (song.tag->has_playlist) + /* this song file has an embedded CUE sheet */ + print_playlist_in_directory(client, base, + song.directory, song.uri); + + return true; +} + +static bool +PrintPlaylistBrief(Client &client, bool base, + const PlaylistInfo &playlist, + const LightDirectory &directory) +{ + print_playlist_in_directory(client, base, + &directory, playlist.name.c_str()); + return true; +} + +static bool +PrintPlaylistFull(Client &client, bool base, + const PlaylistInfo &playlist, + const LightDirectory &directory) +{ + print_playlist_in_directory(client, base, + &directory, playlist.name.c_str()); + + if (playlist.mtime > 0) + time_print(client, "Last-Modified", playlist.mtime); + + return true; +} + +bool +db_selection_print(Client &client, const DatabaseSelection &selection, + bool full, bool base, Error &error) +{ + const Database *db = client.GetDatabase(error); + if (db == nullptr) + return false; + + using namespace std::placeholders; + const auto d = selection.filter == nullptr + ? std::bind(full ? PrintDirectoryFull : PrintDirectoryBrief, + std::ref(client), base, _1) + : VisitDirectory(); + const auto s = std::bind(full ? PrintSongFull : PrintSongBrief, + std::ref(client), base, _1); + const auto p = selection.filter == nullptr + ? std::bind(full ? PrintPlaylistFull : PrintPlaylistBrief, + std::ref(client), base, _1, _2) + : VisitPlaylist(); + + return db->Visit(selection, d, s, p, error); +} + +static bool +PrintSongURIVisitor(Client &client, const LightSong &song) +{ + song_print_uri(client, song); + + return true; +} + +static bool +PrintUniqueTag(Client &client, TagType tag_type, + const Tag &tag) +{ + const char *value = tag.GetValue(tag_type); + assert(value != nullptr); + client_printf(client, "%s: %s\n", tag_item_names[tag_type], value); + + for (const auto &item : tag) + if (item.type != tag_type) + client_printf(client, "%s: %s\n", + tag_item_names[item.type], item.value); + + return true; +} + +bool +PrintUniqueTags(Client &client, unsigned type, uint32_t group_mask, + const SongFilter *filter, + Error &error) +{ + const Database *db = client.GetDatabase(error); + if (db == nullptr) + return false; + + const DatabaseSelection selection("", true, filter); + + if (type == LOCATE_TAG_FILE_TYPE) { + using namespace std::placeholders; + const auto f = std::bind(PrintSongURIVisitor, + std::ref(client), _1); + return db->Visit(selection, f, error); + } else { + assert(type < TAG_NUM_OF_ITEM_TYPES); + + using namespace std::placeholders; + const auto f = std::bind(PrintUniqueTag, std::ref(client), + (TagType)type, _1); + return db->VisitUniqueTags(selection, (TagType)type, + group_mask, + f, error); + } +} diff --git a/src/db/DatabasePrint.hxx b/src/db/DatabasePrint.hxx new file mode 100644 index 000000000..2ab5e703d --- /dev/null +++ b/src/db/DatabasePrint.hxx @@ -0,0 +1,45 @@ +/* + * Copyright (C) 2003-2014 The Music Player Daemon Project + * http://www.musicpd.org + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#ifndef MPD_DB_PRINT_H +#define MPD_DB_PRINT_H + +#include "Compiler.h" + +#include <stdint.h> + +class SongFilter; +struct DatabaseSelection; +class Client; +class Error; + +/** + * @param full print attributes/tags + * @param base print only base name of songs/directories? + */ +bool +db_selection_print(Client &client, const DatabaseSelection &selection, + bool full, bool base, Error &error); + +bool +PrintUniqueTags(Client &client, unsigned type, uint32_t group_mask, + const SongFilter *filter, + Error &error); + +#endif diff --git a/src/db/DatabaseQueue.cxx b/src/db/DatabaseQueue.cxx new file mode 100644 index 000000000..490678188 --- /dev/null +++ b/src/db/DatabaseQueue.cxx @@ -0,0 +1,53 @@ +/* + * Copyright (C) 2003-2014 The Music Player Daemon Project + * http://www.musicpd.org + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#include "config.h" +#include "DatabaseQueue.hxx" +#include "DatabaseSong.hxx" +#include "Interface.hxx" +#include "Partition.hxx" +#include "Instance.hxx" +#include "DetachedSong.hxx" + +#include <functional> + +static bool +AddToQueue(Partition &partition, const LightSong &song, Error &error) +{ + const Storage &storage = *partition.instance.storage; + unsigned id = + partition.playlist.AppendSong(partition.pc, + DatabaseDetachSong(storage, + song), + error); + return id != 0; +} + +bool +AddFromDatabase(Partition &partition, const DatabaseSelection &selection, + Error &error) +{ + const Database *db = partition.instance.GetDatabase(error); + if (db == nullptr) + return false; + + using namespace std::placeholders; + const auto f = std::bind(AddToQueue, std::ref(partition), _1, _2); + return db->Visit(selection, f, error); +} diff --git a/src/db/DatabaseQueue.hxx b/src/db/DatabaseQueue.hxx new file mode 100644 index 000000000..e653f973c --- /dev/null +++ b/src/db/DatabaseQueue.hxx @@ -0,0 +1,31 @@ +/* + * Copyright (C) 2003-2014 The Music Player Daemon Project + * http://www.musicpd.org + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#ifndef MPD_DATABASE_QUEUE_HXX +#define MPD_DATABASE_QUEUE_HXX + +struct Partition; +struct DatabaseSelection; +class Error; + +bool +AddFromDatabase(Partition &partition, const DatabaseSelection &selection, + Error &error); + +#endif diff --git a/src/db/DatabaseSong.cxx b/src/db/DatabaseSong.cxx new file mode 100644 index 000000000..699213835 --- /dev/null +++ b/src/db/DatabaseSong.cxx @@ -0,0 +1,53 @@ +/* + * Copyright (C) 2003-2014 The Music Player Daemon Project + * http://www.musicpd.org + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#include "config.h" +#include "DatabaseSong.hxx" +#include "LightSong.hxx" +#include "Interface.hxx" +#include "DetachedSong.hxx" +#include "storage/StorageInterface.hxx" + +DetachedSong +DatabaseDetachSong(const Storage &storage, const LightSong &song) +{ + DetachedSong detached(song); + assert(detached.IsInDatabase()); + + if (!detached.HasRealURI()) { + const auto uri = song.GetURI(); + detached.SetRealURI(storage.MapUTF8(uri.c_str())); + } + + return detached; +} + +DetachedSong * +DatabaseDetachSong(const Database &db, const Storage &storage, const char *uri, + Error &error) +{ + const LightSong *tmp = db.GetSong(uri, error); + if (tmp == nullptr) + return nullptr; + + DetachedSong *song = new DetachedSong(DatabaseDetachSong(storage, + *tmp)); + db.ReturnSong(tmp); + return song; +} diff --git a/src/db/DatabaseSong.hxx b/src/db/DatabaseSong.hxx new file mode 100644 index 000000000..4daaf4047 --- /dev/null +++ b/src/db/DatabaseSong.hxx @@ -0,0 +1,50 @@ +/* + * Copyright (C) 2003-2014 The Music Player Daemon Project + * http://www.musicpd.org + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#ifndef MPD_DATABASE_SONG_HXX +#define MPD_DATABASE_SONG_HXX + +#include "Compiler.h" + +struct LightSong; +class Database; +class Storage; +class DetachedSong; +class Error; + +/** + * "Detach" the #Song object, i.e. convert it to a #DetachedSong + * instance. + */ +gcc_pure +DetachedSong +DatabaseDetachSong(const Storage &storage, const LightSong &song); + +/** + * Look up a song in the database and convert it to a #DetachedSong + * instance. The caller is responsible for freeing it. + * + * @return nullptr on error + */ +gcc_malloc gcc_nonnull_all +DetachedSong * +DatabaseDetachSong(const Database &db, const Storage &storage, const char *uri, + Error &error); + +#endif diff --git a/src/db/Helpers.cxx b/src/db/Helpers.cxx new file mode 100644 index 000000000..089b2b17d --- /dev/null +++ b/src/db/Helpers.cxx @@ -0,0 +1,98 @@ +/* + * Copyright (C) 2003-2014 The Music Player Daemon Project + * http://www.musicpd.org + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#include "Helpers.hxx" +#include "Stats.hxx" +#include "Interface.hxx" +#include "LightSong.hxx" +#include "tag/Tag.hxx" + +#include <set> + +#include <string.h> + +struct StringLess { + gcc_pure + bool operator()(const char *a, const char *b) const { + return strcmp(a, b) < 0; + } +}; + +typedef std::set<const char *, StringLess> StringSet; + +static void +StatsVisitTag(DatabaseStats &stats, StringSet &artists, StringSet &albums, + const Tag &tag) +{ + if (tag.time > 0) + stats.total_duration += tag.time; + + for (const auto &item : tag) { + switch (item.type) { + case TAG_ARTIST: +#if defined(__clang__) || GCC_CHECK_VERSION(4,8) + artists.emplace(item.value); +#else + artists.insert(item.value); +#endif + break; + + case TAG_ALBUM: +#if defined(__clang__) || GCC_CHECK_VERSION(4,8) + albums.emplace(item.value); +#else + albums.insert(item.value); +#endif + break; + + default: + break; + } + } +} + +static bool +StatsVisitSong(DatabaseStats &stats, StringSet &artists, StringSet &albums, + const LightSong &song) +{ + ++stats.song_count; + + StatsVisitTag(stats, artists, albums, *song.tag); + + return true; +} + +bool +GetStats(const Database &db, const DatabaseSelection &selection, + DatabaseStats &stats, Error &error) +{ + stats.Clear(); + + StringSet artists, albums; + using namespace std::placeholders; + const auto f = std::bind(StatsVisitSong, + std::ref(stats), std::ref(artists), + std::ref(albums), _1); + if (!db.Visit(selection, f, error)) + return false; + + stats.artist_count = artists.size(); + stats.album_count = albums.size(); + return true; +} diff --git a/src/db/Helpers.hxx b/src/db/Helpers.hxx new file mode 100644 index 000000000..651bac0e0 --- /dev/null +++ b/src/db/Helpers.hxx @@ -0,0 +1,32 @@ +/* + * Copyright (C) 2003-2014 The Music Player Daemon Project + * http://www.musicpd.org + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#ifndef MPD_MEMORY_DATABASE_PLUGIN_HXX +#define MPD_MEMORY_DATABASE_PLUGIN_HXX + +class Error; +class Database; +struct DatabaseSelection; +struct DatabaseStats; + +bool +GetStats(const Database &db, const DatabaseSelection &selection, + DatabaseStats &stats, Error &error); + +#endif diff --git a/src/db/Interface.hxx b/src/db/Interface.hxx new file mode 100644 index 000000000..152928c79 --- /dev/null +++ b/src/db/Interface.hxx @@ -0,0 +1,138 @@ +/* + * Copyright (C) 2003-2014 The Music Player Daemon Project + * http://www.musicpd.org + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#ifndef MPD_DATABASE_INTERFACE_HXX +#define MPD_DATABASE_INTERFACE_HXX + +#include "Visitor.hxx" +#include "tag/TagType.h" +#include "Compiler.h" + +#include <time.h> +#include <stdint.h> + +struct DatabasePlugin; +struct DatabaseStats; +struct DatabaseSelection; +struct LightSong; +class Error; + +class Database { + const DatabasePlugin &plugin; + +public: + Database(const DatabasePlugin &_plugin) + :plugin(_plugin) {} + + /** + * Free instance data. + */ + virtual ~Database() {} + + const DatabasePlugin &GetPlugin() const { + return plugin; + } + + bool IsPlugin(const DatabasePlugin &other) const { + return &plugin == &other; + } + + /** + * Open the database. Read it into memory if applicable. + */ + virtual bool Open(gcc_unused Error &error) { + return true; + } + + /** + * Close the database, free allocated memory. + */ + virtual void Close() {} + + /** + * Look up a song (including tag data) in the database. When + * you don't need this anymore, call ReturnSong(). + * + * @param uri_utf8 the URI of the song within the music + * directory (UTF-8) + */ + virtual const LightSong *GetSong(const char *uri_utf8, + Error &error) const = 0; + + /** + * Mark the song object as "unused". Call this on objects + * returned by GetSong(). + */ + virtual void ReturnSong(const LightSong *song) const = 0; + + /** + * Visit the selected entities. + */ + virtual bool Visit(const DatabaseSelection &selection, + VisitDirectory visit_directory, + VisitSong visit_song, + VisitPlaylist visit_playlist, + Error &error) const = 0; + + bool Visit(const DatabaseSelection &selection, + VisitDirectory visit_directory, + VisitSong visit_song, + Error &error) const { + return Visit(selection, visit_directory, visit_song, + VisitPlaylist(), error); + } + + bool Visit(const DatabaseSelection &selection, VisitSong visit_song, + Error &error) const { + return Visit(selection, VisitDirectory(), visit_song, error); + } + + /** + * Visit all unique tag values. + */ + virtual bool VisitUniqueTags(const DatabaseSelection &selection, + TagType tag_type, uint32_t group_mask, + VisitTag visit_tag, + Error &error) const = 0; + + virtual bool GetStats(const DatabaseSelection &selection, + DatabaseStats &stats, + Error &error) const = 0; + + /** + * Update the database. Returns the job id on success, 0 on + * error (with #Error set) and 0 if not implemented (#Error + * not set). + */ + virtual unsigned Update(gcc_unused const char *uri_utf8, + gcc_unused bool discard, + gcc_unused Error &error) { + /* not implemented: return 0 and don't set an Error */ + return 0; + } + + /** + * Returns the time stamp of the last database update. + * Returns 0 if that is not not known/available. + */ + gcc_pure + virtual time_t GetUpdateStamp() const = 0; +}; + +#endif diff --git a/src/db/LightDirectory.hxx b/src/db/LightDirectory.hxx new file mode 100644 index 000000000..d134151a4 --- /dev/null +++ b/src/db/LightDirectory.hxx @@ -0,0 +1,61 @@ +/* + * Copyright (C) 2003-2014 The Music Player Daemon Project + * http://www.musicpd.org + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#ifndef MPD_LIGHT_DIRECTORY_HXX +#define MPD_LIGHT_DIRECTORY_HXX + +#include "Compiler.h" + +#include <string> + +#include <time.h> + +struct Tag; + +/** + * A reference to a directory. Unlike the #Directory class, this one + * consists only of pointers. It is supposed to be as light as + * possible while still providing all the information MPD has about a + * directory. This class does not manage any memory, and the pointers + * become invalid quickly. Only to be used to pass around during + * well-defined situations. + */ +struct LightDirectory { + const char *uri; + + time_t mtime; + + constexpr LightDirectory(const char *_uri, time_t _mtime) + :uri(_uri), mtime(_mtime) {} + + static constexpr LightDirectory Root() { + return LightDirectory("", 0); + } + + bool IsRoot() const { + return *uri == 0; + } + + gcc_pure + const char *GetPath() const { + return uri; + } +}; + +#endif diff --git a/src/db/LightSong.cxx b/src/db/LightSong.cxx new file mode 100644 index 000000000..af1e801f8 --- /dev/null +++ b/src/db/LightSong.cxx @@ -0,0 +1,33 @@ +/* + * Copyright (C) 2003-2014 The Music Player Daemon Project + * http://www.musicpd.org + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#include "LightSong.hxx" +#include "tag/Tag.hxx" + +double +LightSong::GetDuration() const +{ + if (end_ms > 0) + return (end_ms - start_ms) / 1000.0; + + if (tag->time <= 0) + return 0; + + return tag->time - start_ms / 1000.0; +} diff --git a/src/db/LightSong.hxx b/src/db/LightSong.hxx new file mode 100644 index 000000000..add9da855 --- /dev/null +++ b/src/db/LightSong.hxx @@ -0,0 +1,92 @@ +/* + * Copyright (C) 2003-2014 The Music Player Daemon Project + * http://www.musicpd.org + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#ifndef MPD_LIGHT_SONG_HXX +#define MPD_LIGHT_SONG_HXX + +#include "Compiler.h" + +#include <string> + +#include <time.h> + +struct Tag; + +/** + * A reference to a song file. Unlike the other "Song" classes in the + * MPD code base, this one consists only of pointers. It is supposed + * to be as light as possible while still providing all the + * information MPD has about a song file. This class does not manage + * any memory, and the pointers become invalid quickly. Only to be + * used to pass around during well-defined situations. + */ +struct LightSong { + /** + * If this is not nullptr, then it denotes a prefix for the + * #uri. To build the full URI, join directory and uri with a + * slash. + */ + const char *directory; + + const char *uri; + + /** + * The "real" URI, the one to be used for opening the + * resource. If this attribute is nullptr, then #uri (and + * #directory) shall be used. + * + * This attribute is used for songs from the database which + * have a relative URI. + */ + const char *real_uri; + + /** + * Must not be nullptr. + */ + const Tag *tag; + + time_t mtime; + + /** + * Start of this sub-song within the file in milliseconds. + */ + unsigned start_ms; + + /** + * End of this sub-song within the file in milliseconds. + * Unused if zero. + */ + unsigned end_ms; + + gcc_pure + std::string GetURI() const { + if (directory == nullptr) + return std::string(uri); + + std::string result(directory); + result.push_back('/'); + result.append(uri); + return result; + } + + gcc_pure + double GetDuration() const; +}; + +#endif diff --git a/src/db/PlaylistInfo.hxx b/src/db/PlaylistInfo.hxx new file mode 100644 index 000000000..baa6cc361 --- /dev/null +++ b/src/db/PlaylistInfo.hxx @@ -0,0 +1,63 @@ +/* + * Copyright (C) 2003-2014 The Music Player Daemon Project + * http://www.musicpd.org + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#ifndef MPD_PLAYLIST_INFO_HXX +#define MPD_PLAYLIST_INFO_HXX + +#include "check.h" +#include "Compiler.h" + +#include <string> + +#include <sys/time.h> + +/** + * A directory entry pointing to a playlist file. + */ +struct PlaylistInfo { + /** + * The UTF-8 encoded name of the playlist file. + */ + std::string name; + + time_t mtime; + + class CompareName { + const char *const name; + + public: + constexpr CompareName(const char *_name):name(_name) {} + + gcc_pure + bool operator()(const PlaylistInfo &pi) const { + return pi.name.compare(name) == 0; + } + }; + + PlaylistInfo() = default; + + template<typename N> + PlaylistInfo(N &&_name, time_t _mtime) + :name(std::forward<N>(_name)), mtime(_mtime) {} + + PlaylistInfo(const PlaylistInfo &other) = delete; + PlaylistInfo(PlaylistInfo &&) = default; +}; + +#endif diff --git a/src/db/PlaylistVector.cxx b/src/db/PlaylistVector.cxx new file mode 100644 index 000000000..82a3519d9 --- /dev/null +++ b/src/db/PlaylistVector.cxx @@ -0,0 +1,66 @@ +/* + * Copyright (C) 2003-2014 The Music Player Daemon Project + * http://www.musicpd.org + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#include "config.h" +#include "PlaylistVector.hxx" +#include "db/DatabaseLock.hxx" + +#include <algorithm> + +#include <assert.h> + +PlaylistVector::iterator +PlaylistVector::find(const char *name) +{ + assert(holding_db_lock()); + assert(name != nullptr); + + return std::find_if(begin(), end(), + PlaylistInfo::CompareName(name)); +} + +bool +PlaylistVector::UpdateOrInsert(PlaylistInfo &&pi) +{ + assert(holding_db_lock()); + + auto i = find(pi.name.c_str()); + if (i != end()) { + if (pi.mtime == i->mtime) + return false; + + i->mtime = pi.mtime; + } else + push_back(std::move(pi)); + + return true; +} + +bool +PlaylistVector::erase(const char *name) +{ + assert(holding_db_lock()); + + auto i = find(name); + if (i == end()) + return false; + + erase(i); + return true; +} diff --git a/src/db/PlaylistVector.hxx b/src/db/PlaylistVector.hxx new file mode 100644 index 000000000..accd4fd42 --- /dev/null +++ b/src/db/PlaylistVector.hxx @@ -0,0 +1,56 @@ +/* + * Copyright (C) 2003-2014 The Music Player Daemon Project + * http://www.musicpd.org + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#ifndef MPD_PLAYLIST_VECTOR_HXX +#define MPD_PLAYLIST_VECTOR_HXX + +#include "db/PlaylistInfo.hxx" +#include "Compiler.h" + +#include <list> + +class PlaylistVector : protected std::list<PlaylistInfo> { +protected: + /** + * Caller must lock the #db_mutex. + */ + gcc_pure + iterator find(const char *name); + +public: + using std::list<PlaylistInfo>::empty; + using std::list<PlaylistInfo>::begin; + using std::list<PlaylistInfo>::end; + using std::list<PlaylistInfo>::push_back; + using std::list<PlaylistInfo>::erase; + + /** + * Caller must lock the #db_mutex. + * + * @return true if the vector or one of its items was modified + */ + bool UpdateOrInsert(PlaylistInfo &&pi); + + /** + * Caller must lock the #db_mutex. + */ + bool erase(const char *name); +}; + +#endif /* SONGVEC_H */ diff --git a/src/db/Registry.cxx b/src/db/Registry.cxx new file mode 100644 index 000000000..5681a9b82 --- /dev/null +++ b/src/db/Registry.cxx @@ -0,0 +1,48 @@ +/* + * Copyright (C) 2003-2014 The Music Player Daemon Project + * http://www.musicpd.org + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#include "config.h" +#include "Registry.hxx" +#include "DatabasePlugin.hxx" +#include "plugins/simple/SimpleDatabasePlugin.hxx" +#include "plugins/ProxyDatabasePlugin.hxx" +#include "plugins/upnp/UpnpDatabasePlugin.hxx" + +#include <string.h> + +const DatabasePlugin *const database_plugins[] = { + &simple_db_plugin, +#ifdef HAVE_LIBMPDCLIENT + &proxy_db_plugin, +#endif +#ifdef HAVE_LIBUPNP + &upnp_db_plugin, +#endif + nullptr +}; + +const DatabasePlugin * +GetDatabasePluginByName(const char *name) +{ + for (auto i = database_plugins; *i != nullptr; ++i) + if (strcmp((*i)->name, name) == 0) + return *i; + + return nullptr; +} diff --git a/src/db/Registry.hxx b/src/db/Registry.hxx new file mode 100644 index 000000000..050842e21 --- /dev/null +++ b/src/db/Registry.hxx @@ -0,0 +1,37 @@ +/* + * Copyright (C) 2003-2014 The Music Player Daemon Project + * http://www.musicpd.org + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#ifndef MPD_DATABASE_REGISTRY_HXX +#define MPD_DATABASE_REGISTRY_HXX + +#include "Compiler.h" + +struct DatabasePlugin; + +/** + * nullptr terminated list of all database plugins which were enabled at + * compile time. + */ +extern const DatabasePlugin *const database_plugins[]; + +gcc_pure +const DatabasePlugin * +GetDatabasePluginByName(const char *name); + +#endif diff --git a/src/db/Selection.cxx b/src/db/Selection.cxx new file mode 100644 index 000000000..a886916cb --- /dev/null +++ b/src/db/Selection.cxx @@ -0,0 +1,49 @@ +/* + * Copyright (C) 2003-2014 The Music Player Daemon Project + * http://www.musicpd.org + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#include "Selection.hxx" +#include "SongFilter.hxx" + +DatabaseSelection::DatabaseSelection(const char *_uri, bool _recursive, + const SongFilter *_filter) + :uri(_uri), recursive(_recursive), filter(_filter) +{ + /* optimization: if the caller didn't specify a base URI, pick + the one from SongFilter */ + if (uri.empty() && filter != nullptr) + uri = filter->GetBase(); +} + +bool +DatabaseSelection::IsEmpty() const +{ + return uri.empty() && (filter == nullptr || filter->IsEmpty()); +} + +bool +DatabaseSelection::HasOtherThanBase() const +{ + return filter != nullptr && filter->HasOtherThanBase(); +} + +bool +DatabaseSelection::Match(const LightSong &song) const +{ + return filter == nullptr || filter->Match(song); +} diff --git a/src/db/Selection.hxx b/src/db/Selection.hxx new file mode 100644 index 000000000..9802603fc --- /dev/null +++ b/src/db/Selection.hxx @@ -0,0 +1,60 @@ +/* + * Copyright (C) 2003-2014 The Music Player Daemon Project + * http://www.musicpd.org + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#ifndef MPD_DATABASE_SELECTION_HXX +#define MPD_DATABASE_SELECTION_HXX + +#include "Compiler.h" + +#include <string> + +class SongFilter; +struct LightSong; + +struct DatabaseSelection { + /** + * The base URI of the search (UTF-8). Must not begin or end + * with a slash. An empty string searches the whole database. + */ + std::string uri; + + /** + * Recursively search all sub directories? + */ + bool recursive; + + const SongFilter *filter; + + DatabaseSelection(const char *_uri, bool _recursive, + const SongFilter *_filter=nullptr); + + gcc_pure + bool IsEmpty() const; + + /** + * Does this selection contain constraints other than "base"? + */ + gcc_pure + bool HasOtherThanBase() const; + + gcc_pure + bool Match(const LightSong &song) const; +}; + +#endif diff --git a/src/db/SimpleDatabasePlugin.cxx b/src/db/SimpleDatabasePlugin.cxx deleted file mode 100644 index e7ea7a62d..000000000 --- a/src/db/SimpleDatabasePlugin.cxx +++ /dev/null @@ -1,323 +0,0 @@ -/* - * Copyright (C) 2003-2013 The Music Player Daemon Project - * http://www.musicpd.org - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License along - * with this program; if not, write to the Free Software Foundation, Inc., - * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. - */ - -#include "config.h" -#include "SimpleDatabasePlugin.hxx" -#include "DatabaseSelection.hxx" -#include "DatabaseHelpers.hxx" -#include "Directory.hxx" -#include "SongFilter.hxx" -#include "DatabaseSave.hxx" -#include "DatabaseLock.hxx" -#include "DatabaseError.hxx" -#include "TextFile.hxx" -#include "ConfigData.hxx" -#include "fs/FileSystem.hxx" -#include "util/Error.hxx" -#include "util/Domain.hxx" -#include "Log.hxx" - -#include <sys/types.h> -#include <errno.h> - -static constexpr Domain simple_db_domain("simple_db"); - -Database * -SimpleDatabase::Create(const config_param ¶m, Error &error) -{ - SimpleDatabase *db = new SimpleDatabase(); - if (!db->Configure(param, error)) { - delete db; - db = nullptr; - } - - return db; -} - -bool -SimpleDatabase::Configure(const config_param ¶m, Error &error) -{ - path = param.GetBlockPath("path", error); - if (path.IsNull()) { - if (!error.IsDefined()) - error.Set(simple_db_domain, - "No \"path\" parameter specified"); - return false; - } - - path_utf8 = path.ToUTF8(); - - return true; -} - -bool -SimpleDatabase::Check(Error &error) const -{ - assert(!path.IsNull()); - - /* Check if the file exists */ - if (!CheckAccess(path, F_OK)) { - /* If the file doesn't exist, we can't check if we can write - * it, so we are going to try to get the directory path, and - * see if we can write a file in that */ - const auto dirPath = path.GetDirectoryName(); - - /* Check that the parent part of the path is a directory */ - struct stat st; - if (!StatFile(dirPath, st)) { - error.FormatErrno("Couldn't stat parent directory of db file " - "\"%s\"", - path_utf8.c_str()); - return false; - } - - if (!S_ISDIR(st.st_mode)) { - error.Format(simple_db_domain, - "Couldn't create db file \"%s\" because the " - "parent path is not a directory", - path_utf8.c_str()); - return false; - } - - /* Check if we can write to the directory */ - if (!CheckAccess(dirPath, X_OK | W_OK)) { - const int e = errno; - const std::string dirPath_utf8 = dirPath.ToUTF8(); - error.FormatErrno(e, "Can't create db file in \"%s\"", - dirPath_utf8.c_str()); - return false; - } - - return true; - } - - /* Path exists, now check if it's a regular file */ - struct stat st; - if (!StatFile(path, st)) { - error.FormatErrno("Couldn't stat db file \"%s\"", - path_utf8.c_str()); - return false; - } - - if (!S_ISREG(st.st_mode)) { - error.Format(simple_db_domain, - "db file \"%s\" is not a regular file", - path_utf8.c_str()); - return false; - } - - /* And check that we can write to it */ - if (!CheckAccess(path, R_OK | W_OK)) { - error.FormatErrno("Can't open db file \"%s\" for reading/writing", - path_utf8.c_str()); - return false; - } - - return true; -} - -bool -SimpleDatabase::Load(Error &error) -{ - assert(!path.IsNull()); - assert(root != nullptr); - - TextFile file(path); - if (file.HasFailed()) { - error.FormatErrno("Failed to open database file \"%s\"", - path_utf8.c_str()); - return false; - } - - if (!db_load_internal(file, *root, error)) - return false; - - struct stat st; - if (StatFile(path, st)) - mtime = st.st_mtime; - - return true; -} - -bool -SimpleDatabase::Open(Error &error) -{ - root = Directory::NewRoot(); - mtime = 0; - -#ifndef NDEBUG - borrowed_song_count = 0; -#endif - - if (!Load(error)) { - root->Free(); - - LogError(error); - error.Clear(); - - if (!Check(error)) - return false; - - root = Directory::NewRoot(); - } - - return true; -} - -void -SimpleDatabase::Close() -{ - assert(root != nullptr); - assert(borrowed_song_count == 0); - - root->Free(); -} - -Song * -SimpleDatabase::GetSong(const char *uri, Error &error) const -{ - assert(root != nullptr); - - db_lock(); - Song *song = root->LookupSong(uri); - db_unlock(); - if (song == nullptr) - error.Format(db_domain, DB_NOT_FOUND, - "No such song: %s", uri); -#ifndef NDEBUG - else - ++const_cast<unsigned &>(borrowed_song_count); -#endif - - return song; -} - -void -SimpleDatabase::ReturnSong(gcc_unused Song *song) const -{ - assert(song != nullptr); - -#ifndef NDEBUG - assert(borrowed_song_count > 0); - --const_cast<unsigned &>(borrowed_song_count); -#endif -} - -gcc_pure -const Directory * -SimpleDatabase::LookupDirectory(const char *uri) const -{ - assert(root != nullptr); - assert(uri != nullptr); - - ScopeDatabaseLock protect; - return root->LookupDirectory(uri); -} - -bool -SimpleDatabase::Visit(const DatabaseSelection &selection, - VisitDirectory visit_directory, - VisitSong visit_song, - VisitPlaylist visit_playlist, - Error &error) const -{ - ScopeDatabaseLock protect; - - const Directory *directory = root->LookupDirectory(selection.uri.c_str()); - if (directory == nullptr) { - if (visit_song) { - Song *song = root->LookupSong(selection.uri.c_str()); - if (song != nullptr) - return !selection.Match(*song) || - visit_song(*song, error); - } - - error.Set(db_domain, DB_NOT_FOUND, "No such directory"); - return false; - } - - if (selection.recursive && visit_directory && - !visit_directory(*directory, error)) - return false; - - return directory->Walk(selection.recursive, selection.filter, - visit_directory, visit_song, visit_playlist, - error); -} - -bool -SimpleDatabase::VisitUniqueTags(const DatabaseSelection &selection, - TagType tag_type, - VisitString visit_string, - Error &error) const -{ - return ::VisitUniqueTags(*this, selection, tag_type, visit_string, - error); -} - -bool -SimpleDatabase::GetStats(const DatabaseSelection &selection, - DatabaseStats &stats, Error &error) const -{ - return ::GetStats(*this, selection, stats, error); -} - -bool -SimpleDatabase::Save(Error &error) -{ - db_lock(); - - LogDebug(simple_db_domain, "removing empty directories from DB"); - root->PruneEmpty(); - - LogDebug(simple_db_domain, "sorting DB"); - root->Sort(); - - db_unlock(); - - LogDebug(simple_db_domain, "writing DB"); - - FILE *fp = FOpen(path, FOpenMode::WriteText); - if (!fp) { - error.FormatErrno("unable to write to db file \"%s\"", - path_utf8.c_str()); - return false; - } - - db_save_internal(fp, *root); - - if (ferror(fp)) { - error.SetErrno("Failed to write to database file"); - fclose(fp); - return false; - } - - fclose(fp); - - struct stat st; - if (StatFile(path, st)) - mtime = st.st_mtime; - - return true; -} - -const DatabasePlugin simple_db_plugin = { - "simple", - SimpleDatabase::Create, -}; diff --git a/src/db/Stats.hxx b/src/db/Stats.hxx new file mode 100644 index 000000000..107af9d5f --- /dev/null +++ b/src/db/Stats.hxx @@ -0,0 +1,51 @@ +/* + * Copyright (C) 2003-2014 The Music Player Daemon Project + * http://www.musicpd.org + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#ifndef MPD_DATABASE_STATS_HXX +#define MPD_DATABASE_STATS_HXX + +struct DatabaseStats { + /** + * Number of songs. + */ + unsigned song_count; + + /** + * Total duration of all songs (in seconds). + */ + unsigned long total_duration; + + /** + * Number of distinct artist names. + */ + unsigned artist_count; + + /** + * Number of distinct album names. + */ + unsigned album_count; + + void Clear() { + song_count = 0; + total_duration = 0; + artist_count = album_count = 0; + } +}; + +#endif diff --git a/src/db/UniqueTags.cxx b/src/db/UniqueTags.cxx new file mode 100644 index 000000000..589dc936d --- /dev/null +++ b/src/db/UniqueTags.cxx @@ -0,0 +1,59 @@ +/* + * Copyright (C) 2003-2014 The Music Player Daemon Project + * http://www.musicpd.org + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#include "UniqueTags.hxx" +#include "Interface.hxx" +#include "LightSong.hxx" +#include "tag/Set.hxx" + +#include <functional> + +#include <assert.h> + +static bool +CollectTags(TagSet &set, TagType tag_type, uint32_t group_mask, + const LightSong &song) +{ + assert(song.tag != nullptr); + const Tag &tag = *song.tag; + + set.InsertUnique(tag, tag_type, group_mask); + return true; +} + +bool +VisitUniqueTags(const Database &db, const DatabaseSelection &selection, + TagType tag_type, uint32_t group_mask, + VisitTag visit_tag, + Error &error) +{ + TagSet set; + + using namespace std::placeholders; + const auto f = std::bind(CollectTags, std::ref(set), + tag_type, group_mask, _1); + if (!db.Visit(selection, f, error)) + return false; + + for (const auto &value : set) + if (!visit_tag(value, error)) + return false; + + return true; +} diff --git a/src/db/UniqueTags.hxx b/src/db/UniqueTags.hxx new file mode 100644 index 000000000..61004fc56 --- /dev/null +++ b/src/db/UniqueTags.hxx @@ -0,0 +1,38 @@ +/* + * Copyright (C) 2003-2014 The Music Player Daemon Project + * http://www.musicpd.org + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#ifndef MPD_DB_UNIQUE_TAGS_HXX +#define MPD_DB_UNIQUE_TAGS_HXX + +#include "Visitor.hxx" +#include "tag/TagType.h" + +#include <stdint.h> + +class Error; +class Database; +struct DatabaseSelection; + +bool +VisitUniqueTags(const Database &db, const DatabaseSelection &selection, + TagType tag_type, uint32_t group_mask, + VisitTag visit_tag, + Error &error); + +#endif diff --git a/src/db/Uri.hxx b/src/db/Uri.hxx new file mode 100644 index 000000000..04960ba80 --- /dev/null +++ b/src/db/Uri.hxx @@ -0,0 +1,29 @@ +/* + * Copyright (C) 2003-2014 The Music Player Daemon Project + * http://www.musicpd.org + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#ifndef MPD_DB_URI_HXX +#define MPD_DB_URI_HXX + +static inline bool +isRootDirectory(const char *name) +{ + return name[0] == 0 || (name[0] == '/' && name[1] == 0); +} + +#endif diff --git a/src/db/Visitor.hxx b/src/db/Visitor.hxx new file mode 100644 index 000000000..c524f1722 --- /dev/null +++ b/src/db/Visitor.hxx @@ -0,0 +1,38 @@ +/* + * Copyright (C) 2003-2014 The Music Player Daemon Project + * http://www.musicpd.org + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#ifndef MPD_DATABASE_VISITOR_HXX +#define MPD_DATABASE_VISITOR_HXX + +#include <functional> + +struct LightDirectory; +struct LightSong; +struct PlaylistInfo; +struct Tag; +class Error; + +typedef std::function<bool(const LightDirectory &, Error &)> VisitDirectory; +typedef std::function<bool(const LightSong &, Error &)> VisitSong; +typedef std::function<bool(const PlaylistInfo &, const LightDirectory &, + Error &)> VisitPlaylist; + +typedef std::function<bool(const Tag &, Error &)> VisitTag; + +#endif diff --git a/src/db/plugins/LazyDatabase.cxx b/src/db/plugins/LazyDatabase.cxx new file mode 100644 index 000000000..bc52395c5 --- /dev/null +++ b/src/db/plugins/LazyDatabase.cxx @@ -0,0 +1,108 @@ +/* + * Copyright (C) 2003-2014 The Music Player Daemon Project + * http://www.musicpd.org + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#include "config.h" +#include "LazyDatabase.hxx" +#include "db/Interface.hxx" + +#include <assert.h> + +LazyDatabase::LazyDatabase(Database *_db) + :Database(_db->GetPlugin()), db(_db), open(false) {} + +LazyDatabase::~LazyDatabase() +{ + assert(!open); + + delete db; +} + +bool +LazyDatabase::EnsureOpen(Error &error) const +{ + if (open) + return true; + + if (!db->Open(error)) + return false; + + open = true; + return true; +} + +void +LazyDatabase::Close() +{ + if (open) { + open = false; + db->Close(); + } +} + +const LightSong * +LazyDatabase::GetSong(const char *uri, Error &error) const +{ + return EnsureOpen(error) + ? db->GetSong(uri, error) + : nullptr; +} + +void +LazyDatabase::ReturnSong(const LightSong *song) const +{ + assert(open); + + db->ReturnSong(song); +} + +bool +LazyDatabase::Visit(const DatabaseSelection &selection, + VisitDirectory visit_directory, + VisitSong visit_song, + VisitPlaylist visit_playlist, + Error &error) const +{ + return EnsureOpen(error) && + db->Visit(selection, visit_directory, visit_song, + visit_playlist, error); +} + +bool +LazyDatabase::VisitUniqueTags(const DatabaseSelection &selection, + TagType tag_type, uint32_t group_mask, + VisitTag visit_tag, + Error &error) const +{ + return EnsureOpen(error) && + db->VisitUniqueTags(selection, tag_type, group_mask, visit_tag, + error); +} + +bool +LazyDatabase::GetStats(const DatabaseSelection &selection, + DatabaseStats &stats, Error &error) const +{ + return EnsureOpen(error) && db->GetStats(selection, stats, error); +} + +time_t +LazyDatabase::GetUpdateStamp() const +{ + return open ? db->GetUpdateStamp() : 0; +} diff --git a/src/db/plugins/LazyDatabase.hxx b/src/db/plugins/LazyDatabase.hxx new file mode 100644 index 000000000..ae1b961d0 --- /dev/null +++ b/src/db/plugins/LazyDatabase.hxx @@ -0,0 +1,69 @@ +/* + * Copyright (C) 2003-2014 The Music Player Daemon Project + * http://www.musicpd.org + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#ifndef MPD_LAZY_DATABASE_PLUGIN_HXX +#define MPD_LAZY_DATABASE_PLUGIN_HXX + +#include "db/Interface.hxx" +#include "Compiler.h" + +/** + * A wrapper for a #Database object that gets opened on the first + * database access. This works around daemonization problems with + * some plugins. + */ +class LazyDatabase final : public Database { + Database *const db; + + mutable bool open; + +public: + gcc_nonnull_all + LazyDatabase(Database *_db); + + virtual ~LazyDatabase(); + + virtual void Close() override; + + virtual const LightSong *GetSong(const char *uri_utf8, + Error &error) const override; + virtual void ReturnSong(const LightSong *song) const; + + virtual bool Visit(const DatabaseSelection &selection, + VisitDirectory visit_directory, + VisitSong visit_song, + VisitPlaylist visit_playlist, + Error &error) const override; + + virtual bool VisitUniqueTags(const DatabaseSelection &selection, + TagType tag_type, uint32_t group_mask, + VisitTag visit_tag, + Error &error) const override; + + virtual bool GetStats(const DatabaseSelection &selection, + DatabaseStats &stats, + Error &error) const override; + + virtual time_t GetUpdateStamp() const override; + +private: + bool EnsureOpen(Error &error) const; +}; + +#endif diff --git a/src/db/ProxyDatabasePlugin.cxx b/src/db/plugins/ProxyDatabasePlugin.cxx index cb1bcdc6b..0b358c0ba 100644 --- a/src/db/ProxyDatabasePlugin.cxx +++ b/src/db/plugins/ProxyDatabasePlugin.cxx @@ -1,5 +1,5 @@ /* - * Copyright (C) 2003-2013 The Music Player Daemon Project + * Copyright (C) 2003-2014 The Music Player Daemon Project * http://www.musicpd.org * * This program is free software; you can redistribute it and/or modify @@ -19,45 +19,91 @@ #include "config.h" #include "ProxyDatabasePlugin.hxx" -#include "DatabasePlugin.hxx" -#include "DatabaseSelection.hxx" -#include "DatabaseError.hxx" -#include "PlaylistVector.hxx" -#include "Directory.hxx" -#include "Song.hxx" +#include "db/Interface.hxx" +#include "db/DatabasePlugin.hxx" +#include "db/DatabaseListener.hxx" +#include "db/Selection.hxx" +#include "db/DatabaseError.hxx" +#include "db/PlaylistInfo.hxx" +#include "db/LightDirectory.hxx" +#include "db/LightSong.hxx" +#include "db/Stats.hxx" #include "SongFilter.hxx" #include "Compiler.h" -#include "ConfigData.hxx" +#include "config/ConfigData.hxx" #include "tag/TagBuilder.hxx" +#include "tag/Tag.hxx" #include "util/Error.hxx" #include "util/Domain.hxx" #include "protocol/Ack.hxx" +#include "event/SocketMonitor.hxx" +#include "event/IdleMonitor.hxx" +#include "Log.hxx" #include <mpd/client.h> +#include <mpd/async.h> #include <cassert> #include <string> #include <list> -class ProxyDatabase : public Database { +class ProxySong : public LightSong { + Tag tag2; + +public: + explicit ProxySong(const mpd_song *song); +}; + +class AllocatedProxySong : public ProxySong { + mpd_song *const song; + +public: + explicit AllocatedProxySong(mpd_song *_song) + :ProxySong(_song), song(_song) {} + + ~AllocatedProxySong() { + mpd_song_free(song); + } +}; + +class ProxyDatabase final : public Database, SocketMonitor, IdleMonitor { + DatabaseListener &listener; + std::string host; unsigned port; struct mpd_connection *connection; - Directory *root; /* this is mutable because GetStats() must be "const" */ mutable time_t update_stamp; + /** + * The libmpdclient idle mask that was removed from the other + * MPD. This will be handled by the next OnIdle() call. + */ + unsigned idle_received; + + /** + * Is the #connection currently "idle"? That is, did we send + * the "idle" command to it? + */ + bool is_idle; + public: - static Database *Create(const config_param ¶m, + ProxyDatabase(EventLoop &_loop, DatabaseListener &_listener) + :Database(proxy_db_plugin), + SocketMonitor(_loop), IdleMonitor(_loop), + listener(_listener) {} + + static Database *Create(EventLoop &loop, DatabaseListener &listener, + const config_param ¶m, Error &error); virtual bool Open(Error &error) override; virtual void Close() override; - virtual Song *GetSong(const char *uri_utf8, + virtual const LightSong *GetSong(const char *uri_utf8, Error &error) const override; - virtual void ReturnSong(Song *song) const; + virtual void ReturnSong(const LightSong *song) const; virtual bool Visit(const DatabaseSelection &selection, VisitDirectory visit_directory, @@ -66,14 +112,17 @@ public: Error &error) const override; virtual bool VisitUniqueTags(const DatabaseSelection &selection, - TagType tag_type, - VisitString visit_string, + TagType tag_type, uint32_t group_mask, + VisitTag visit_tag, Error &error) const override; virtual bool GetStats(const DatabaseSelection &selection, DatabaseStats &stats, Error &error) const override; + virtual unsigned Update(const char *uri_utf8, bool discard, + Error &error) override; + virtual time_t GetUpdateStamp() const override { return update_stamp; } @@ -84,6 +133,14 @@ private: bool Connect(Error &error); bool CheckConnection(Error &error); bool EnsureConnected(Error &error); + + void Disconnect(); + + /* virtual methods from SocketMonitor */ + virtual bool OnSocketReady(unsigned flags) override; + + /* virtual methods from IdleMonitor */ + virtual void OnIdle() override; }; static constexpr Domain libmpdclient_domain("libmpdclient"); @@ -112,6 +169,44 @@ static constexpr struct { { TAG_NUM_OF_ITEM_TYPES, MPD_TAG_COUNT } }; +static void +Copy(TagBuilder &tag, TagType d_tag, + const struct mpd_song *song, enum mpd_tag_type s_tag) +{ + + for (unsigned i = 0;; ++i) { + const char *value = mpd_song_get_tag(song, s_tag, i); + if (value == nullptr) + break; + + tag.AddItem(d_tag, value); + } +} + +ProxySong::ProxySong(const mpd_song *song) +{ + directory = nullptr; + uri = mpd_song_get_uri(song); + real_uri = nullptr; + tag = &tag2; + mtime = mpd_song_get_last_modified(song); + +#if LIBMPDCLIENT_CHECK_VERSION(2,3,0) + start_ms = mpd_song_get_start(song) * 1000; + end_ms = mpd_song_get_end(song) * 1000; +#else + start_ms = end_ms = 0; +#endif + + TagBuilder tag_builder; + tag_builder.SetTime(mpd_song_get_duration(song)); + + for (const auto *i = &tag_table[0]; i->d != TAG_NUM_OF_ITEM_TYPES; ++i) + Copy(tag_builder, i->d, song, i->s); + + tag_builder.Commit(tag2); +} + gcc_const static enum mpd_tag_type Convert(TagType tag_type) @@ -217,9 +312,10 @@ SendConstraints(mpd_connection *connection, const DatabaseSelection &selection) } Database * -ProxyDatabase::Create(const config_param ¶m, Error &error) +ProxyDatabase::Create(EventLoop &loop, DatabaseListener &listener, + const config_param ¶m, Error &error) { - ProxyDatabase *db = new ProxyDatabase(); + ProxyDatabase *db = new ProxyDatabase(loop, listener); if (!db->Configure(param, error)) { delete db; db = nullptr; @@ -243,7 +339,6 @@ ProxyDatabase::Open(Error &error) if (!Connect(error)) return false; - root = Directory::NewRoot(); update_stamp = 0; return true; @@ -252,10 +347,8 @@ ProxyDatabase::Open(Error &error) void ProxyDatabase::Close() { - root->Free(); - if (connection != nullptr) - mpd_connection_free(connection); + Disconnect(); } bool @@ -270,14 +363,18 @@ ProxyDatabase::Connect(Error &error) } if (!CheckError(connection, error)) { - if (connection != nullptr) { - mpd_connection_free(connection); - connection = nullptr; - } + mpd_connection_free(connection); + connection = nullptr; return false; } + idle_received = unsigned(-1); + is_idle = false; + + SocketMonitor::Open(mpd_async_get_fd(mpd_connection_get_async(connection))); + IdleMonitor::Schedule(); + return true; } @@ -287,10 +384,22 @@ ProxyDatabase::CheckConnection(Error &error) assert(connection != nullptr); if (!mpd_connection_clear_error(connection)) { - mpd_connection_free(connection); + Disconnect(); return Connect(error); } + if (is_idle) { + unsigned idle = mpd_run_noidle(connection); + if (idle == 0 && !CheckError(connection, error)) { + Disconnect(); + return false; + } + + idle_received |= idle; + is_idle = false; + IdleMonitor::Schedule(); + } + return true; } @@ -302,10 +411,80 @@ ProxyDatabase::EnsureConnected(Error &error) : Connect(error); } -static Song * -Convert(const struct mpd_song *song); +void +ProxyDatabase::Disconnect() +{ + assert(connection != nullptr); + + IdleMonitor::Cancel(); + SocketMonitor::Steal(); + + mpd_connection_free(connection); + connection = nullptr; +} + +bool +ProxyDatabase::OnSocketReady(gcc_unused unsigned flags) +{ + assert(connection != nullptr); + + if (!is_idle) { + // TODO: can this happen? + IdleMonitor::Schedule(); + return false; + } + + unsigned idle = (unsigned)mpd_recv_idle(connection, false); + if (idle == 0) { + Error error; + if (!CheckError(connection, error)) { + LogError(error); + Disconnect(); + return false; + } + } + + /* let OnIdle() handle this */ + idle_received |= idle; + is_idle = false; + IdleMonitor::Schedule(); + return false; +} + +void +ProxyDatabase::OnIdle() +{ + assert(connection != nullptr); + + /* handle previous idle events */ + + if (idle_received & MPD_IDLE_DATABASE) + listener.OnDatabaseModified(); + + idle_received = 0; -Song * + /* send a new idle command to the other MPD */ + + if (is_idle) + // TODO: can this happen? + return; + + if (!mpd_send_idle_mask(connection, MPD_IDLE_DATABASE)) { + Error error; + if (!CheckError(connection, error)) + LogError(error); + + SocketMonitor::Steal(); + mpd_connection_free(connection); + connection = nullptr; + return; + } + + is_idle = true; + SocketMonitor::ScheduleRead(); +} + +const LightSong * ProxyDatabase::GetSong(const char *uri, Error &error) const { // TODO: eliminate the const_cast @@ -318,33 +497,29 @@ ProxyDatabase::GetSong(const char *uri, Error &error) const } struct mpd_song *song = mpd_recv_song(connection); - Song *song2 = song != nullptr - ? Convert(song) - : nullptr; - if (song != nullptr) - mpd_song_free(song); - if (!mpd_response_finish(connection)) { - if (song2 != nullptr) - song2->Free(); - - CheckError(connection, error); + if (!mpd_response_finish(connection) && + !CheckError(connection, error)) { + if (song != nullptr) + mpd_song_free(song); return nullptr; } - if (song2 == nullptr) + if (song == nullptr) { error.Format(db_domain, DB_NOT_FOUND, "No such song: %s", uri); + return nullptr; + } - return song2; + return new AllocatedProxySong(song); } void -ProxyDatabase::ReturnSong(Song *song) const +ProxyDatabase::ReturnSong(const LightSong *_song) const { - assert(song != nullptr); - assert(song->IsInDatabase()); - assert(song->IsDetached()); + assert(_song != nullptr); - song->Free(); + AllocatedProxySong *song = (AllocatedProxySong *) + const_cast<LightSong *>(_song); + delete song; } static bool @@ -361,14 +536,15 @@ Visit(struct mpd_connection *connection, VisitPlaylist visit_playlist, Error &error) { const char *path = mpd_directory_get_path(directory); +#if LIBMPDCLIENT_CHECK_VERSION(2,9,0) + time_t mtime = mpd_directory_get_last_modified(directory); +#else + time_t mtime = 0; +#endif - if (visit_directory) { - Directory *d = Directory::NewGeneric(path, &detached_root); - bool success = visit_directory(*d, error); - d->Free(); - if (!success) - return false; - } + if (visit_directory && + !visit_directory(LightDirectory(path, mtime), error)) + return false; if (recursive && !Visit(connection, path, recursive, filter, @@ -378,65 +554,23 @@ Visit(struct mpd_connection *connection, return true; } -static void -Copy(TagBuilder &tag, TagType d_tag, - const struct mpd_song *song, enum mpd_tag_type s_tag) -{ - - for (unsigned i = 0;; ++i) { - const char *value = mpd_song_get_tag(song, s_tag, i); - if (value == nullptr) - break; - - tag.AddItem(d_tag, value); - } -} - -static Song * -Convert(const struct mpd_song *song) -{ - Song *s = Song::NewDetached(mpd_song_get_uri(song)); - - s->mtime = mpd_song_get_last_modified(song); - -#if LIBMPDCLIENT_CHECK_VERSION(2,3,0) - s->start_ms = mpd_song_get_start(song) * 1000; - s->end_ms = mpd_song_get_end(song) * 1000; -#else - s->start_ms = s->end_ms = 0; -#endif - - TagBuilder tag; - tag.SetTime(mpd_song_get_duration(song)); - - for (const auto *i = &tag_table[0]; i->d != TAG_NUM_OF_ITEM_TYPES; ++i) - Copy(tag, i->d, song, i->s); - - s->tag = tag.Commit(); - - return s; -} - gcc_pure static bool -Match(const SongFilter *filter, const Song &song) +Match(const SongFilter *filter, const LightSong &song) { return filter == nullptr || filter->Match(song); } static bool Visit(const SongFilter *filter, - const struct mpd_song *song, + const mpd_song *_song, VisitSong visit_song, Error &error) { if (!visit_song) return true; - Song *s = Convert(song); - bool success = !Match(filter, *s) || visit_song(*s, error); - s->Free(); - - return success; + const ProxySong song(_song); + return !Match(filter, song) || visit_song(song, error); } static bool @@ -449,7 +583,7 @@ Visit(const struct mpd_playlist *playlist, PlaylistInfo p(mpd_playlist_get_path(playlist), mpd_playlist_get_last_modified(playlist)); - return visit_playlist(p, detached_root, error); + return visit_playlist(p, LightDirectory::Root(), error); } class ProxyEntity { @@ -554,12 +688,10 @@ SearchSongs(struct mpd_connection *connection, bool result = true; struct mpd_song *song; while (result && (song = mpd_recv_song(connection)) != nullptr) { - Song *song2 = Convert(song); - mpd_song_free(song); + AllocatedProxySong song2(song); - result = !Match(selection.filter, *song2) || - visit_song(*song2, error); - song2->Free(); + result = !Match(selection.filter, song2) || + visit_song(song2, error); } mpd_response_finish(connection); @@ -612,7 +744,8 @@ ProxyDatabase::Visit(const DatabaseSelection &selection, bool ProxyDatabase::VisitUniqueTags(const DatabaseSelection &selection, TagType tag_type, - VisitString visit_string, + gcc_unused uint32_t group_mask, + VisitTag visit_tag, Error &error) const { // TODO: eliminate the const_cast @@ -631,6 +764,8 @@ ProxyDatabase::VisitUniqueTags(const DatabaseSelection &selection, if (!SendConstraints(connection, selection)) return CheckError(connection, error); + // TODO: use group_mask + if (!mpd_search_commit(connection)) return CheckError(connection, error); @@ -639,7 +774,9 @@ ProxyDatabase::VisitUniqueTags(const DatabaseSelection &selection, struct mpd_pair *pair; while (result && (pair = mpd_recv_pair_tag(connection, tag_type2)) != nullptr) { - result = visit_string(pair->value, error); + TagBuilder tag; + tag.AddItem(tag_type, pair->value); + result = visit_tag(tag.Commit(), error); mpd_return_pair(connection, pair); } @@ -675,7 +812,24 @@ ProxyDatabase::GetStats(const DatabaseSelection &selection, return true; } +unsigned +ProxyDatabase::Update(const char *uri_utf8, bool discard, + Error &error) +{ + if (!EnsureConnected(error)) + return 0; + + unsigned id = discard + ? mpd_run_rescan(connection, uri_utf8) + : mpd_run_update(connection, uri_utf8); + if (id == 0) + CheckError(connection, error); + + return id; +} + const DatabasePlugin proxy_db_plugin = { "proxy", + DatabasePlugin::FLAG_REQUIRE_STORAGE, ProxyDatabase::Create, }; diff --git a/src/db/ProxyDatabasePlugin.hxx b/src/db/plugins/ProxyDatabasePlugin.hxx index 576c01c69..699d374b5 100644 --- a/src/db/ProxyDatabasePlugin.hxx +++ b/src/db/plugins/ProxyDatabasePlugin.hxx @@ -1,5 +1,5 @@ /* - * Copyright (C) 2003-2013 The Music Player Daemon Project + * Copyright (C) 2003-2014 The Music Player Daemon Project * http://www.musicpd.org * * This program is free software; you can redistribute it and/or modify diff --git a/src/db/plugins/simple/DatabaseSave.cxx b/src/db/plugins/simple/DatabaseSave.cxx new file mode 100644 index 000000000..c766843b6 --- /dev/null +++ b/src/db/plugins/simple/DatabaseSave.cxx @@ -0,0 +1,160 @@ +/* + * Copyright (C) 2003-2014 The Music Player Daemon Project + * http://www.musicpd.org + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#include "config.h" +#include "DatabaseSave.hxx" +#include "db/DatabaseLock.hxx" +#include "db/DatabaseError.hxx" +#include "Directory.hxx" +#include "DirectorySave.hxx" +#include "fs/io/BufferedOutputStream.hxx" +#include "fs/io/TextFile.hxx" +#include "tag/Tag.hxx" +#include "tag/TagSettings.h" +#include "fs/Charset.hxx" +#include "util/StringUtil.hxx" +#include "util/Error.hxx" +#include "Log.hxx" + +#include <string.h> +#include <stdlib.h> + +#define DIRECTORY_INFO_BEGIN "info_begin" +#define DIRECTORY_INFO_END "info_end" +#define DB_FORMAT_PREFIX "format: " +#define DIRECTORY_MPD_VERSION "mpd_version: " +#define DIRECTORY_FS_CHARSET "fs_charset: " +#define DB_TAG_PREFIX "tag: " + +static constexpr unsigned DB_FORMAT = 2; + +/** + * The oldest database format understood by this MPD version. + */ +static constexpr unsigned OLDEST_DB_FORMAT = 1; + +void +db_save_internal(BufferedOutputStream &os, const Directory &music_root) +{ + os.Format("%s\n", DIRECTORY_INFO_BEGIN); + os.Format(DB_FORMAT_PREFIX "%u\n", DB_FORMAT); + os.Format("%s%s\n", DIRECTORY_MPD_VERSION, VERSION); + os.Format("%s%s\n", DIRECTORY_FS_CHARSET, GetFSCharset()); + + for (unsigned i = 0; i < TAG_NUM_OF_ITEM_TYPES; ++i) + if (!ignore_tag_items[i]) + os.Format(DB_TAG_PREFIX "%s\n", tag_item_names[i]); + + os.Format("%s\n", DIRECTORY_INFO_END); + + directory_save(os, music_root); +} + +bool +db_load_internal(TextFile &file, Directory &music_root, Error &error) +{ + char *line; + unsigned format = 0; + bool found_charset = false, found_version = false; + bool success; + bool tags[TAG_NUM_OF_ITEM_TYPES]; + + /* get initial info */ + line = file.ReadLine(); + if (line == nullptr || strcmp(DIRECTORY_INFO_BEGIN, line) != 0) { + error.Set(db_domain, "Database corrupted"); + return false; + } + + memset(tags, false, sizeof(tags)); + + while ((line = file.ReadLine()) != nullptr && + strcmp(line, DIRECTORY_INFO_END) != 0) { + if (StringStartsWith(line, DB_FORMAT_PREFIX)) { + format = atoi(line + sizeof(DB_FORMAT_PREFIX) - 1); + } else if (StringStartsWith(line, DIRECTORY_MPD_VERSION)) { + if (found_version) { + error.Set(db_domain, "Duplicate version line"); + return false; + } + + found_version = true; + } else if (StringStartsWith(line, DIRECTORY_FS_CHARSET)) { + const char *new_charset; + + if (found_charset) { + error.Set(db_domain, "Duplicate charset line"); + return false; + } + + found_charset = true; + + new_charset = line + sizeof(DIRECTORY_FS_CHARSET) - 1; + const char *const old_charset = GetFSCharset(); + if (*old_charset != 0 + && strcmp(new_charset, old_charset) != 0) { + error.Format(db_domain, + "Existing database has charset " + "\"%s\" instead of \"%s\"; " + "discarding database file", + new_charset, old_charset); + return false; + } + } else if (StringStartsWith(line, DB_TAG_PREFIX)) { + const char *name = line + sizeof(DB_TAG_PREFIX) - 1; + TagType tag = tag_name_parse(name); + if (tag == TAG_NUM_OF_ITEM_TYPES) { + error.Format(db_domain, + "Unrecognized tag '%s', " + "discarding database file", + name); + return false; + } + + tags[tag] = true; + } else { + error.Format(db_domain, "Malformed line: %s", line); + return false; + } + } + + if (format < OLDEST_DB_FORMAT || format > DB_FORMAT) { + error.Set(db_domain, + "Database format mismatch, " + "discarding database file"); + return false; + } + + for (unsigned i = 0; i < TAG_NUM_OF_ITEM_TYPES; ++i) { + if (!ignore_tag_items[i] && !tags[i]) { + error.Set(db_domain, + "Tag list mismatch, " + "discarding database file"); + return false; + } + } + + LogDebug(db_domain, "reading DB"); + + db_lock(); + success = directory_load(file, music_root, error); + db_unlock(); + + return success; +} diff --git a/src/db/plugins/simple/DatabaseSave.hxx b/src/db/plugins/simple/DatabaseSave.hxx new file mode 100644 index 000000000..bb7f57115 --- /dev/null +++ b/src/db/plugins/simple/DatabaseSave.hxx @@ -0,0 +1,34 @@ +/* + * Copyright (C) 2003-2014 The Music Player Daemon Project + * http://www.musicpd.org + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#ifndef MPD_DATABASE_SAVE_HXX +#define MPD_DATABASE_SAVE_HXX + +struct Directory; +class BufferedOutputStream; +class TextFile; +class Error; + +void +db_save_internal(BufferedOutputStream &os, const Directory &root); + +bool +db_load_internal(TextFile &file, Directory &root, Error &error); + +#endif diff --git a/src/db/plugins/simple/Directory.cxx b/src/db/plugins/simple/Directory.cxx new file mode 100644 index 000000000..218652b03 --- /dev/null +++ b/src/db/plugins/simple/Directory.cxx @@ -0,0 +1,277 @@ +/* + * Copyright (C) 2003-2014 The Music Player Daemon Project + * http://www.musicpd.org + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#include "config.h" +#include "Directory.hxx" +#include "SongSort.hxx" +#include "Song.hxx" +#include "Mount.hxx" +#include "db/LightDirectory.hxx" +#include "db/LightSong.hxx" +#include "db/Uri.hxx" +#include "db/DatabaseLock.hxx" +#include "db/Interface.hxx" +#include "SongFilter.hxx" +#include "lib/icu/Collate.hxx" +#include "fs/Traits.hxx" +#include "util/Alloc.hxx" +#include "util/Error.hxx" + +#include <assert.h> +#include <string.h> +#include <stdlib.h> + +Directory::Directory(std::string &&_path_utf8, Directory *_parent) + :parent(_parent), + mtime(0), + inode(0), device(0), + path(std::move(_path_utf8)), + mounted_database(nullptr) +{ +} + +Directory::~Directory() +{ + delete mounted_database; + + songs.clear_and_dispose(Song::Disposer()); + children.clear_and_dispose(Disposer()); +} + +void +Directory::Delete() +{ + assert(holding_db_lock()); + assert(parent != nullptr); + + parent->children.erase_and_dispose(parent->children.iterator_to(*this), + Disposer()); +} + +const char * +Directory::GetName() const +{ + assert(!IsRoot()); + + return PathTraitsUTF8::GetBase(path.c_str()); +} + +Directory * +Directory::CreateChild(const char *name_utf8) +{ + assert(holding_db_lock()); + assert(name_utf8 != nullptr); + assert(*name_utf8 != 0); + + std::string path_utf8 = IsRoot() + ? std::string(name_utf8) + : PathTraitsUTF8::Build(GetPath(), name_utf8); + + Directory *child = new Directory(std::move(path_utf8), this); + children.push_back(*child); + return child; +} + +const Directory * +Directory::FindChild(const char *name) const +{ + assert(holding_db_lock()); + + for (const auto &child : children) + if (strcmp(child.GetName(), name) == 0) + return &child; + + return nullptr; +} + +void +Directory::PruneEmpty() +{ + assert(holding_db_lock()); + + for (auto child = children.begin(), end = children.end(); + child != end;) { + child->PruneEmpty(); + + if (child->IsEmpty()) + child = children.erase_and_dispose(child, Disposer()); + else + ++child; + } +} + +Directory::LookupResult +Directory::LookupDirectory(const char *uri) +{ + assert(holding_db_lock()); + assert(uri != nullptr); + + if (isRootDirectory(uri)) + return { this, nullptr }; + + char *duplicated = xstrdup(uri), *name = duplicated; + + Directory *d = this; + while (true) { + char *slash = strchr(name, '/'); + if (slash == name) + break; + + if (slash != nullptr) + *slash = '\0'; + + Directory *tmp = d->FindChild(name); + if (tmp == nullptr) + /* not found */ + break; + + d = tmp; + + if (slash == nullptr) { + /* found everything */ + name = nullptr; + break; + } + + name = slash + 1; + } + + free(duplicated); + + const char *rest = name == nullptr + ? nullptr + : uri + (name - duplicated); + + return { d, rest }; +} + +void +Directory::AddSong(Song *song) +{ + assert(holding_db_lock()); + assert(song != nullptr); + assert(song->parent == this); + + songs.push_back(*song); +} + +void +Directory::RemoveSong(Song *song) +{ + assert(holding_db_lock()); + assert(song != nullptr); + assert(song->parent == this); + + songs.erase(songs.iterator_to(*song)); +} + +const Song * +Directory::FindSong(const char *name_utf8) const +{ + assert(holding_db_lock()); + assert(name_utf8 != nullptr); + + for (auto &song : songs) { + assert(song.parent == this); + + if (strcmp(song.uri, name_utf8) == 0) + return &song; + } + + return nullptr; +} + +gcc_pure +static bool +directory_cmp(const Directory &a, const Directory &b) +{ + return IcuCollate(a.path.c_str(), b.path.c_str()) < 0; +} + +void +Directory::Sort() +{ + assert(holding_db_lock()); + + children.sort(directory_cmp); + song_list_sort(songs); + + for (auto &child : children) + child.Sort(); +} + +bool +Directory::Walk(bool recursive, const SongFilter *filter, + VisitDirectory visit_directory, VisitSong visit_song, + VisitPlaylist visit_playlist, + Error &error) const +{ + assert(!error.IsDefined()); + + if (IsMount()) { + assert(IsEmpty()); + + /* TODO: eliminate this unlock/lock; it is necessary + because the child's SimpleDatabasePlugin::Visit() + call will lock it again */ + db_unlock(); + bool result = WalkMount(GetPath(), *mounted_database, + recursive, filter, + visit_directory, visit_song, + visit_playlist, + error); + db_lock(); + return result; + } + + if (visit_song) { + for (auto &song : songs){ + const LightSong song2 = song.Export(); + if ((filter == nullptr || filter->Match(song2)) && + !visit_song(song2, error)) + return false; + } + } + + if (visit_playlist) { + for (const PlaylistInfo &p : playlists) + if (!visit_playlist(p, Export(), error)) + return false; + } + + for (auto &child : children) { + if (visit_directory && + !visit_directory(child.Export(), error)) + return false; + + if (recursive && + !child.Walk(recursive, filter, + visit_directory, visit_song, visit_playlist, + error)) + return false; + } + + return true; +} + +LightDirectory +Directory::Export() const +{ + return LightDirectory(GetPath(), mtime); +} diff --git a/src/db/plugins/simple/Directory.hxx b/src/db/plugins/simple/Directory.hxx new file mode 100644 index 000000000..acef62143 --- /dev/null +++ b/src/db/plugins/simple/Directory.hxx @@ -0,0 +1,285 @@ +/* + * Copyright (C) 2003-2014 The Music Player Daemon Project + * http://www.musicpd.org + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#ifndef MPD_DIRECTORY_HXX +#define MPD_DIRECTORY_HXX + +#include "check.h" +#include "Compiler.h" +#include "db/Visitor.hxx" +#include "db/PlaylistVector.hxx" +#include "Song.hxx" + +#include <boost/intrusive/list.hpp> + +#include <string> + +/** + * Virtual directory that is really an archive file or a folder inside + * the archive (special value for Directory::device). + */ +static constexpr unsigned DEVICE_INARCHIVE = -1; + +/** + * Virtual directory that is really a song file with one or more "sub" + * songs as specified by DecoderPlugin::container_scan() (special + * value for Directory::device). + */ +static constexpr unsigned DEVICE_CONTAINER = -2; + +struct db_visitor; +class SongFilter; +class Error; +class Database; + +struct Directory { + static constexpr auto link_mode = boost::intrusive::normal_link; + typedef boost::intrusive::link_mode<link_mode> LinkMode; + typedef boost::intrusive::list_member_hook<LinkMode> Hook; + + struct Disposer { + void operator()(Directory *directory) const { + delete directory; + } + }; + + /** + * Pointers to the siblings of this directory within the + * parent directory. It is unused (undefined) in the root + * directory. + * + * This attribute is protected with the global #db_mutex. + * Read access in the update thread does not need protection. + */ + Hook siblings; + + typedef boost::intrusive::member_hook<Directory, Hook, + &Directory::siblings> SiblingsHook; + typedef boost::intrusive::list<Directory, SiblingsHook, + boost::intrusive::constant_time_size<false>> List; + + /** + * A doubly linked list of child directories. + * + * This attribute is protected with the global #db_mutex. + * Read access in the update thread does not need protection. + */ + List children; + + /** + * A doubly linked list of songs within this directory. + * + * This attribute is protected with the global #db_mutex. + * Read access in the update thread does not need protection. + */ + SongList songs; + + PlaylistVector playlists; + + Directory *parent; + time_t mtime; + unsigned inode, device; + + std::string path; + + /** + * If this is not nullptr, then this directory does not really + * exist, but is a mount point for another #Database. + */ + Database *mounted_database; + +public: + Directory(std::string &&_path_utf8, Directory *_parent); + ~Directory(); + + /** + * Create a new root #Directory object. + */ + gcc_malloc + static Directory *NewRoot() { + return new Directory(std::string(), nullptr); + } + + bool IsMount() const { + return mounted_database != nullptr; + } + + /** + * Remove this #Directory object from its parent and free it. This + * must not be called with the root Directory. + * + * Caller must lock the #db_mutex. + */ + void Delete(); + + /** + * Create a new #Directory object as a child of the given one. + * + * Caller must lock the #db_mutex. + * + * @param name_utf8 the UTF-8 encoded name of the new sub directory + */ + gcc_malloc + Directory *CreateChild(const char *name_utf8); + + /** + * Caller must lock the #db_mutex. + */ + gcc_pure + const Directory *FindChild(const char *name) const; + + gcc_pure + Directory *FindChild(const char *name) { + const Directory *cthis = this; + return const_cast<Directory *>(cthis->FindChild(name)); + } + + /** + * Look up a sub directory, and create the object if it does not + * exist. + * + * Caller must lock the #db_mutex. + */ + Directory *MakeChild(const char *name_utf8) { + Directory *child = FindChild(name_utf8); + if (child == nullptr) + child = CreateChild(name_utf8); + return child; + } + + struct LookupResult { + /** + * The last directory that was found. If the given + * URI could not be resolved at all, then this is the + * root directory. + */ + Directory *directory; + + /** + * The remaining URI part (without leading slash) or + * nullptr if the given URI was consumed completely. + */ + const char *uri; + }; + + /** + * Looks up a directory by its relative URI. + * + * @param uri the relative URI + * @return the Directory, or nullptr if none was found + */ + gcc_pure + LookupResult LookupDirectory(const char *uri); + + gcc_pure + bool IsEmpty() const { + return children.empty() && + songs.empty() && + playlists.empty(); + } + + gcc_pure + const char *GetPath() const { + return path.c_str(); + } + + /** + * Returns the base name of the directory. + */ + gcc_pure + const char *GetName() const; + + /** + * Is this the root directory of the music database? + */ + gcc_pure + bool IsRoot() const { + return parent == nullptr; + } + + template<typename T> + void ForEachChildSafe(T &&t) { + const auto end = children.end(); + for (auto i = children.begin(), next = i; i != end; i = next) { + next = std::next(i); + t(*i); + } + } + + template<typename T> + void ForEachSongSafe(T &&t) { + const auto end = songs.end(); + for (auto i = songs.begin(), next = i; i != end; i = next) { + next = std::next(i); + t(*i); + } + } + + /** + * Look up a song in this directory by its name. + * + * Caller must lock the #db_mutex. + */ + gcc_pure + const Song *FindSong(const char *name_utf8) const; + + gcc_pure + Song *FindSong(const char *name_utf8) { + const Directory *cthis = this; + return const_cast<Song *>(cthis->FindSong(name_utf8)); + } + + /** + * Add a song object to this directory. Its "parent" attribute must + * be set already. + */ + void AddSong(Song *song); + + /** + * Remove a song object from this directory (which effectively + * invalidates the song object, because the "parent" attribute becomes + * stale), but does not free it. + */ + void RemoveSong(Song *song); + + /** + * Caller must lock the #db_mutex. + */ + void PruneEmpty(); + + /** + * Sort all directory entries recursively. + * + * Caller must lock the #db_mutex. + */ + void Sort(); + + /** + * Caller must lock #db_mutex. + */ + bool Walk(bool recursive, const SongFilter *match, + VisitDirectory visit_directory, VisitSong visit_song, + VisitPlaylist visit_playlist, + Error &error) const; + + gcc_pure + LightDirectory Export() const; +}; + +#endif diff --git a/src/db/plugins/simple/DirectorySave.cxx b/src/db/plugins/simple/DirectorySave.cxx new file mode 100644 index 000000000..e1650cbe8 --- /dev/null +++ b/src/db/plugins/simple/DirectorySave.cxx @@ -0,0 +1,207 @@ +/* + * Copyright (C) 2003-2014 The Music Player Daemon Project + * http://www.musicpd.org + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#include "config.h" +#include "DirectorySave.hxx" +#include "Directory.hxx" +#include "Song.hxx" +#include "SongSave.hxx" +#include "DetachedSong.hxx" +#include "PlaylistDatabase.hxx" +#include "fs/io/TextFile.hxx" +#include "fs/io/BufferedOutputStream.hxx" +#include "util/StringUtil.hxx" +#include "util/NumberParser.hxx" +#include "util/Error.hxx" +#include "util/Domain.hxx" + +#include <stddef.h> +#include <string.h> + +#define DIRECTORY_DIR "directory: " +#define DIRECTORY_TYPE "type: " +#define DIRECTORY_MTIME "mtime: " +#define DIRECTORY_BEGIN "begin: " +#define DIRECTORY_END "end: " + +static constexpr Domain directory_domain("directory"); + +gcc_const +static const char * +DeviceToTypeString(unsigned device) +{ + switch (device) { + case DEVICE_INARCHIVE: + return "archive"; + + case DEVICE_CONTAINER: + return "container"; + + default: + return nullptr; + } +} + +gcc_pure +static unsigned +ParseTypeString(const char *type) +{ + if (strcmp(type, "archive") == 0) + return DEVICE_INARCHIVE; + else if (strcmp(type, "container") == 0) + return DEVICE_CONTAINER; + else + return 0; +} + +void +directory_save(BufferedOutputStream &os, const Directory &directory) +{ + if (!directory.IsRoot()) { + const char *type = DeviceToTypeString(directory.device); + if (type != nullptr) + os.Format(DIRECTORY_TYPE "%s\n", type); + + if (directory.mtime != 0) + os.Format(DIRECTORY_MTIME "%lu\n", + (unsigned long)directory.mtime); + + os.Format("%s%s\n", DIRECTORY_BEGIN, directory.GetPath()); + } + + for (const auto &child : directory.children) { + os.Format(DIRECTORY_DIR "%s\n", child.GetName()); + + if (!child.IsMount()) + directory_save(os, child); + + if (!os.Check()) + return; + } + + for (const auto &song : directory.songs) + song_save(os, song); + + playlist_vector_save(os, directory.playlists); + + if (!directory.IsRoot()) + os.Format(DIRECTORY_END "%s\n", directory.GetPath()); +} + +static bool +ParseLine(Directory &directory, const char *line) +{ + if (StringStartsWith(line, DIRECTORY_MTIME)) { + directory.mtime = + ParseUint64(line + sizeof(DIRECTORY_MTIME) - 1); + } else if (StringStartsWith(line, DIRECTORY_TYPE)) { + directory.device = + ParseTypeString(line + sizeof(DIRECTORY_TYPE) - 1); + } else + return false; + + return true; +} + +static Directory * +directory_load_subdir(TextFile &file, Directory &parent, const char *name, + Error &error) +{ + bool success; + + if (parent.FindChild(name) != nullptr) { + error.Format(directory_domain, + "Duplicate subdirectory '%s'", name); + return nullptr; + } + + Directory *directory = parent.CreateChild(name); + + while (true) { + const char *line = file.ReadLine(); + if (line == nullptr) { + error.Set(directory_domain, "Unexpected end of file"); + directory->Delete(); + return nullptr; + } + + if (StringStartsWith(line, DIRECTORY_BEGIN)) + break; + + if (!ParseLine(*directory, line)) { + error.Format(directory_domain, + "Malformed line: %s", line); + directory->Delete(); + return nullptr; + } + } + + success = directory_load(file, *directory, error); + if (!success) { + directory->Delete(); + return nullptr; + } + + return directory; +} + +bool +directory_load(TextFile &file, Directory &directory, Error &error) +{ + const char *line; + + while ((line = file.ReadLine()) != nullptr && + !StringStartsWith(line, DIRECTORY_END)) { + if (StringStartsWith(line, DIRECTORY_DIR)) { + Directory *subdir = + directory_load_subdir(file, directory, + line + sizeof(DIRECTORY_DIR) - 1, + error); + if (subdir == nullptr) + return false; + } else if (StringStartsWith(line, SONG_BEGIN)) { + const char *name = line + sizeof(SONG_BEGIN) - 1; + + if (directory.FindSong(name) != nullptr) { + error.Format(directory_domain, + "Duplicate song '%s'", name); + return false; + } + + DetachedSong *song = song_load(file, name, error); + if (song == nullptr) + return false; + + directory.AddSong(Song::NewFrom(std::move(*song), + directory)); + delete song; + } else if (StringStartsWith(line, PLAYLIST_META_BEGIN)) { + const char *name = line + sizeof(PLAYLIST_META_BEGIN) - 1; + if (!playlist_metadata_load(file, directory.playlists, + name, error)) + return false; + } else { + error.Format(directory_domain, + "Malformed line: %s", line); + return false; + } + } + + return true; +} diff --git a/src/db/plugins/simple/DirectorySave.hxx b/src/db/plugins/simple/DirectorySave.hxx new file mode 100644 index 000000000..f464f9946 --- /dev/null +++ b/src/db/plugins/simple/DirectorySave.hxx @@ -0,0 +1,34 @@ +/* + * Copyright (C) 2003-2014 The Music Player Daemon Project + * http://www.musicpd.org + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#ifndef MPD_DIRECTORY_SAVE_HXX +#define MPD_DIRECTORY_SAVE_HXX + +struct Directory; +class TextFile; +class BufferedOutputStream; +class Error; + +void +directory_save(BufferedOutputStream &os, const Directory &directory); + +bool +directory_load(TextFile &file, Directory &directory, Error &error); + +#endif diff --git a/src/db/plugins/simple/Mount.cxx b/src/db/plugins/simple/Mount.cxx new file mode 100644 index 000000000..96c7bbb5c --- /dev/null +++ b/src/db/plugins/simple/Mount.cxx @@ -0,0 +1,96 @@ +/* + * Copyright (C) 2003-2014 The Music Player Daemon Project + * http://www.musicpd.org + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#include "config.h" +#include "Mount.hxx" +#include "PrefixedLightSong.hxx" +#include "db/Selection.hxx" +#include "db/LightDirectory.hxx" +#include "db/LightSong.hxx" +#include "db/Interface.hxx" +#include "fs/Traits.hxx" +#include "util/Error.hxx" + +#include <string> + +struct PrefixedLightDirectory : LightDirectory { + std::string buffer; + + PrefixedLightDirectory(const LightDirectory &directory, + const char *base) + :LightDirectory(directory), + buffer(IsRoot() + ? std::string(base) + : PathTraitsUTF8::Build(base, uri)) { + uri = buffer.c_str(); + } +}; + +static bool +PrefixVisitDirectory(const char *base, const VisitDirectory &visit_directory, + const LightDirectory &directory, Error &error) +{ + return visit_directory(PrefixedLightDirectory(directory, base), error); +} + +static bool +PrefixVisitSong(const char *base, const VisitSong &visit_song, + const LightSong &song, Error &error) +{ + return visit_song(PrefixedLightSong(song, base), error); +} + +static bool +PrefixVisitPlaylist(const char *base, const VisitPlaylist &visit_playlist, + const PlaylistInfo &playlist, + const LightDirectory &directory, + Error &error) +{ + return visit_playlist(playlist, + PrefixedLightDirectory(directory, base), + error); +} + +bool +WalkMount(const char *base, const Database &db, + bool recursive, const SongFilter *filter, + const VisitDirectory &visit_directory, const VisitSong &visit_song, + const VisitPlaylist &visit_playlist, + Error &error) +{ + using namespace std::placeholders; + + VisitDirectory vd; + if (visit_directory) + vd = std::bind(PrefixVisitDirectory, + base, std::ref(visit_directory), _1, _2); + + VisitSong vs; + if (visit_song) + vs = std::bind(PrefixVisitSong, + base, std::ref(visit_song), _1, _2); + + VisitPlaylist vp; + if (visit_playlist) + vp = std::bind(PrefixVisitPlaylist, + base, std::ref(visit_playlist), _1, _2, _3); + + return db.Visit(DatabaseSelection("", recursive, filter), + vd, vs, vp, error); +} diff --git a/src/db/plugins/simple/Mount.hxx b/src/db/plugins/simple/Mount.hxx new file mode 100644 index 000000000..a4690114c --- /dev/null +++ b/src/db/plugins/simple/Mount.hxx @@ -0,0 +1,36 @@ +/* + * Copyright (C) 2003-2014 The Music Player Daemon Project + * http://www.musicpd.org + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#ifndef MPD_DB_SIMPLE_MOUNT_HXX +#define MPD_DB_SIMPLE_MOUNT_HXX + +#include "db/Visitor.hxx" + +class Database; +class SongFilter; +class Error; + +bool +WalkMount(const char *base, const Database &db, + bool recursive, const SongFilter *filter, + const VisitDirectory &visit_directory, const VisitSong &visit_song, + const VisitPlaylist &visit_playlist, + Error &error); + +#endif diff --git a/src/db/plugins/simple/PrefixedLightSong.hxx b/src/db/plugins/simple/PrefixedLightSong.hxx new file mode 100644 index 000000000..3664de001 --- /dev/null +++ b/src/db/plugins/simple/PrefixedLightSong.hxx @@ -0,0 +1,41 @@ +/* + * Copyright (C) 2003-2014 The Music Player Daemon Project + * http://www.musicpd.org + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#ifndef MPD_DB_SIMPLE_PREFIXED_LIGHT_SONG_HXX +#define MPD_DB_SIMPLE_PREFIXED_LIGHT_SONG_HXX + +#include "check.h" +#include "db/LightSong.hxx" +#include "fs/Traits.hxx" + +#include <string> + +class PrefixedLightSong : public LightSong { + std::string buffer; + +public: + PrefixedLightSong(const LightSong &song, const char *base) + :LightSong(song), + buffer(PathTraitsUTF8::Build(base, GetURI().c_str())) { + uri = buffer.c_str(); + directory = nullptr; + } +}; + +#endif diff --git a/src/db/plugins/simple/SimpleDatabasePlugin.cxx b/src/db/plugins/simple/SimpleDatabasePlugin.cxx new file mode 100644 index 000000000..9fd88ab83 --- /dev/null +++ b/src/db/plugins/simple/SimpleDatabasePlugin.cxx @@ -0,0 +1,538 @@ +/* + * Copyright (C) 2003-2014 The Music Player Daemon Project + * http://www.musicpd.org + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#include "config.h" +#include "SimpleDatabasePlugin.hxx" +#include "PrefixedLightSong.hxx" +#include "db/DatabasePlugin.hxx" +#include "db/Selection.hxx" +#include "db/Helpers.hxx" +#include "db/UniqueTags.hxx" +#include "db/LightDirectory.hxx" +#include "Directory.hxx" +#include "Song.hxx" +#include "SongFilter.hxx" +#include "DatabaseSave.hxx" +#include "db/DatabaseLock.hxx" +#include "db/DatabaseError.hxx" +#include "fs/io/TextFile.hxx" +#include "fs/io/BufferedOutputStream.hxx" +#include "fs/io/FileOutputStream.hxx" +#include "fs/io/GzipOutputStream.hxx" +#include "config/ConfigData.hxx" +#include "fs/FileSystem.hxx" +#include "util/CharUtil.hxx" +#include "util/Error.hxx" +#include "util/Domain.hxx" +#include "Log.hxx" + +#include <errno.h> + +static constexpr Domain simple_db_domain("simple_db"); + +inline SimpleDatabase::SimpleDatabase() + :Database(simple_db_plugin), + path(AllocatedPath::Null()), +#ifdef HAVE_ZLIB + compress(true), +#endif + cache_path(AllocatedPath::Null()), + prefixed_light_song(nullptr) {} + +inline SimpleDatabase::SimpleDatabase(AllocatedPath &&_path, +#ifndef HAVE_ZLIB + gcc_unused +#endif + bool _compress) + :Database(simple_db_plugin), + path(std::move(_path)), + path_utf8(path.ToUTF8()), +#ifdef HAVE_ZLIB + compress(_compress), +#endif + cache_path(AllocatedPath::Null()), + prefixed_light_song(nullptr) { +} + +Database * +SimpleDatabase::Create(gcc_unused EventLoop &loop, + gcc_unused DatabaseListener &listener, + const config_param ¶m, Error &error) +{ + SimpleDatabase *db = new SimpleDatabase(); + if (!db->Configure(param, error)) { + delete db; + db = nullptr; + } + + return db; +} + +bool +SimpleDatabase::Configure(const config_param ¶m, Error &error) +{ + path = param.GetBlockPath("path", error); + if (path.IsNull()) { + if (!error.IsDefined()) + error.Set(simple_db_domain, + "No \"path\" parameter specified"); + return false; + } + + path_utf8 = path.ToUTF8(); + + cache_path = param.GetBlockPath("cache_directory", error); + if (path.IsNull() && error.IsDefined()) + return false; + +#ifdef HAVE_ZLIB + compress = param.GetBlockValue("compress", compress); +#endif + + return true; +} + +bool +SimpleDatabase::Check(Error &error) const +{ + assert(!path.IsNull()); + + /* Check if the file exists */ + if (!CheckAccess(path)) { + /* If the file doesn't exist, we can't check if we can write + * it, so we are going to try to get the directory path, and + * see if we can write a file in that */ + const auto dirPath = path.GetDirectoryName(); + + /* Check that the parent part of the path is a directory */ + struct stat st; + if (!StatFile(dirPath, st)) { + error.FormatErrno("Couldn't stat parent directory of db file " + "\"%s\"", + path_utf8.c_str()); + return false; + } + + if (!S_ISDIR(st.st_mode)) { + error.Format(simple_db_domain, + "Couldn't create db file \"%s\" because the " + "parent path is not a directory", + path_utf8.c_str()); + return false; + } + +#ifndef WIN32 + /* Check if we can write to the directory */ + if (!CheckAccess(dirPath, X_OK | W_OK)) { + const int e = errno; + const std::string dirPath_utf8 = dirPath.ToUTF8(); + error.FormatErrno(e, "Can't create db file in \"%s\"", + dirPath_utf8.c_str()); + return false; + } +#endif + return true; + } + + /* Path exists, now check if it's a regular file */ + struct stat st; + if (!StatFile(path, st)) { + error.FormatErrno("Couldn't stat db file \"%s\"", + path_utf8.c_str()); + return false; + } + + if (!S_ISREG(st.st_mode)) { + error.Format(simple_db_domain, + "db file \"%s\" is not a regular file", + path_utf8.c_str()); + return false; + } + +#ifndef WIN32 + /* And check that we can write to it */ + if (!CheckAccess(path, R_OK | W_OK)) { + error.FormatErrno("Can't open db file \"%s\" for reading/writing", + path_utf8.c_str()); + return false; + } +#endif + + return true; +} + +bool +SimpleDatabase::Load(Error &error) +{ + assert(!path.IsNull()); + assert(root != nullptr); + + TextFile file(path, error); + if (file.HasFailed()) + return false; + + if (!db_load_internal(file, *root, error) || !file.Check(error)) + return false; + + struct stat st; + if (StatFile(path, st)) + mtime = st.st_mtime; + + return true; +} + +bool +SimpleDatabase::Open(Error &error) +{ + assert(prefixed_light_song == nullptr); + + root = Directory::NewRoot(); + mtime = 0; + +#ifndef NDEBUG + borrowed_song_count = 0; +#endif + + if (!Load(error)) { + delete root; + + LogError(error); + error.Clear(); + + if (!Check(error)) + return false; + + root = Directory::NewRoot(); + } + + return true; +} + +void +SimpleDatabase::Close() +{ + assert(root != nullptr); + assert(prefixed_light_song == nullptr); + assert(borrowed_song_count == 0); + + delete root; +} + +const LightSong * +SimpleDatabase::GetSong(const char *uri, Error &error) const +{ + assert(root != nullptr); + assert(prefixed_light_song == nullptr); + assert(borrowed_song_count == 0); + + db_lock(); + + auto r = root->LookupDirectory(uri); + + if (r.directory->IsMount()) { + /* pass the request to the mounted database */ + db_unlock(); + + const LightSong *song = + r.directory->mounted_database->GetSong(r.uri, error); + if (song == nullptr) + return nullptr; + + prefixed_light_song = + new PrefixedLightSong(*song, r.directory->GetPath()); + return prefixed_light_song; + } + + if (r.uri == nullptr) { + /* it's a directory */ + db_unlock(); + error.Format(db_domain, DB_NOT_FOUND, + "No such song: %s", uri); + return nullptr; + } + + if (strchr(r.uri, '/') != nullptr) { + /* refers to a URI "below" the actual song */ + db_unlock(); + error.Format(db_domain, DB_NOT_FOUND, + "No such song: %s", uri); + return nullptr; + } + + const Song *song = r.directory->FindSong(r.uri); + db_unlock(); + if (song == nullptr) { + error.Format(db_domain, DB_NOT_FOUND, + "No such song: %s", uri); + return nullptr; + } + + light_song = song->Export(); + +#ifndef NDEBUG + ++borrowed_song_count; +#endif + + return &light_song; +} + +void +SimpleDatabase::ReturnSong(gcc_unused const LightSong *song) const +{ + assert(song != nullptr); + assert(song == &light_song || song == prefixed_light_song); + + delete prefixed_light_song; + prefixed_light_song = nullptr; + +#ifndef NDEBUG + if (song == &light_song) { + assert(borrowed_song_count > 0); + --borrowed_song_count; + } +#endif +} + +bool +SimpleDatabase::Visit(const DatabaseSelection &selection, + VisitDirectory visit_directory, + VisitSong visit_song, + VisitPlaylist visit_playlist, + Error &error) const +{ + ScopeDatabaseLock protect; + + auto r = root->LookupDirectory(selection.uri.c_str()); + if (r.uri == nullptr) { + /* it's a directory */ + + if (selection.recursive && visit_directory && + !visit_directory(r.directory->Export(), error)) + return false; + + return r.directory->Walk(selection.recursive, selection.filter, + visit_directory, visit_song, + visit_playlist, + error); + } + + if (strchr(r.uri, '/') == nullptr) { + if (visit_song) { + Song *song = r.directory->FindSong(r.uri); + if (song != nullptr) { + const LightSong song2 = song->Export(); + return !selection.Match(song2) || + visit_song(song2, error); + } + } + } + + error.Set(db_domain, DB_NOT_FOUND, "No such directory"); + return false; +} + +bool +SimpleDatabase::VisitUniqueTags(const DatabaseSelection &selection, + TagType tag_type, uint32_t group_mask, + VisitTag visit_tag, + Error &error) const +{ + return ::VisitUniqueTags(*this, selection, tag_type, group_mask, + visit_tag, + error); +} + +bool +SimpleDatabase::GetStats(const DatabaseSelection &selection, + DatabaseStats &stats, Error &error) const +{ + return ::GetStats(*this, selection, stats, error); +} + +bool +SimpleDatabase::Save(Error &error) +{ + db_lock(); + + LogDebug(simple_db_domain, "removing empty directories from DB"); + root->PruneEmpty(); + + LogDebug(simple_db_domain, "sorting DB"); + root->Sort(); + + db_unlock(); + + LogDebug(simple_db_domain, "writing DB"); + + FileOutputStream fos(path, error); + if (!fos.IsDefined()) + return false; + + OutputStream *os = &fos; + +#ifdef HAVE_ZLIB + GzipOutputStream *gzip = nullptr; + if (compress) { + gzip = new GzipOutputStream(*os, error); + if (!gzip->IsDefined()) { + delete gzip; + return false; + } + + os = gzip; + } +#endif + + BufferedOutputStream bos(*os); + + db_save_internal(bos, *root); + + if (!bos.Flush(error)) { +#ifdef HAVE_ZLIB + delete gzip; +#endif + return false; + } + +#ifdef HAVE_ZLIB + if (gzip != nullptr) { + bool success = gzip->Flush(error); + delete gzip; + if (!success) + return false; + } +#endif + + if (!fos.Commit(error)) + return false; + + struct stat st; + if (StatFile(path, st)) + mtime = st.st_mtime; + + return true; +} + +bool +SimpleDatabase::Mount(const char *uri, Database *db, Error &error) +{ + assert(uri != nullptr); + assert(*uri != 0); + assert(db != nullptr); + + ScopeDatabaseLock protect; + + auto r = root->LookupDirectory(uri); + if (r.uri == nullptr) { + error.Format(db_domain, DB_CONFLICT, + "Already exists: %s", uri); + return nullptr; + } + + if (strchr(r.uri, '/') != nullptr) { + error.Format(db_domain, DB_NOT_FOUND, + "Parent not found: %s", uri); + return nullptr; + } + + Directory *mnt = r.directory->CreateChild(r.uri); + mnt->mounted_database = db; + return true; +} + +static constexpr bool +IsSafeChar(char ch) +{ + return IsAlphaNumericASCII(ch) || ch == '-' || ch == '_' || ch == '%'; +} + +static constexpr bool +IsUnsafeChar(char ch) +{ + return !IsSafeChar(ch); +} + +bool +SimpleDatabase::Mount(const char *local_uri, const char *storage_uri, + Error &error) +{ + if (cache_path.IsNull()) { + error.Format(db_domain, DB_NOT_FOUND, + "No 'cache_directory' configured"); + return nullptr; + } + + std::string name(storage_uri); + std::replace_if(name.begin(), name.end(), IsUnsafeChar, '_'); + +#ifndef HAVE_ZLIB + constexpr bool compress = false; +#endif + auto db = new SimpleDatabase(AllocatedPath::Build(cache_path, + name.c_str()), + compress); + if (!db->Open(error)) { + delete db; + return false; + } + + // TODO: update the new database instance? + + if (!Mount(local_uri, db, error)) { + db->Close(); + delete db; + return false; + } + + return true; +} + +Database * +SimpleDatabase::LockUmountSteal(const char *uri) +{ + ScopeDatabaseLock protect; + + auto r = root->LookupDirectory(uri); + if (r.uri != nullptr || !r.directory->IsMount()) + return nullptr; + + Database *db = r.directory->mounted_database; + r.directory->mounted_database = nullptr; + r.directory->Delete(); + + return db; +} + +bool +SimpleDatabase::Unmount(const char *uri) +{ + Database *db = LockUmountSteal(uri); + if (db == nullptr) + return false; + + db->Close(); + delete db; + return true; +} + +const DatabasePlugin simple_db_plugin = { + "simple", + DatabasePlugin::FLAG_REQUIRE_STORAGE, + SimpleDatabase::Create, +}; diff --git a/src/db/SimpleDatabasePlugin.hxx b/src/db/plugins/simple/SimpleDatabasePlugin.hxx index dfe981dd8..7ba71e272 100644 --- a/src/db/SimpleDatabasePlugin.hxx +++ b/src/db/plugins/simple/SimpleDatabasePlugin.hxx @@ -1,5 +1,5 @@ /* - * Copyright (C) 2003-2013 The Music Player Daemon Project + * Copyright (C) 2003-2014 The Music Player Daemon Project * http://www.musicpd.org * * This program is free software; you can redistribute it and/or modify @@ -20,48 +20,99 @@ #ifndef MPD_SIMPLE_DATABASE_PLUGIN_HXX #define MPD_SIMPLE_DATABASE_PLUGIN_HXX -#include "DatabasePlugin.hxx" +#include "check.h" +#include "db/Interface.hxx" #include "fs/AllocatedPath.hxx" +#include "db/LightSong.hxx" #include "Compiler.h" #include <cassert> +struct config_param; struct Directory; +struct DatabasePlugin; +class EventLoop; +class DatabaseListener; +class PrefixedLightSong; class SimpleDatabase : public Database { AllocatedPath path; std::string path_utf8; +#ifdef HAVE_ZLIB + bool compress; +#endif + + /** + * The path where cache files for Mount() are located. + */ + AllocatedPath cache_path; + Directory *root; time_t mtime; + /** + * A buffer for GetSong() when prefixing the #LightSong + * instance from a mounted #Database. + */ + mutable PrefixedLightSong *prefixed_light_song; + + /** + * A buffer for GetSong(). + */ + mutable LightSong light_song; + #ifndef NDEBUG - unsigned borrowed_song_count; + mutable unsigned borrowed_song_count; #endif - SimpleDatabase() - :path(AllocatedPath::Null()) {} + SimpleDatabase(); + + SimpleDatabase(AllocatedPath &&_path, bool _compress); public: + static Database *Create(EventLoop &loop, DatabaseListener &listener, + const config_param ¶m, + Error &error); + gcc_pure - Directory *GetRoot() { + Directory &GetRoot() { assert(root != NULL); - return root; + return *root; } bool Save(Error &error); - static Database *Create(const config_param ¶m, - Error &error); + /** + * Returns true if there is a valid database file on the disk. + */ + bool FileExists() const { + return mtime > 0; + } + + /** + * @param db the #Database to be mounted; must be "open"; on + * success, this object gains ownership of the given #Database + */ + gcc_nonnull_all + bool Mount(const char *uri, Database *db, Error &error); + + gcc_nonnull_all + bool Mount(const char *local_uri, const char *storage_uri, + Error &error); + gcc_nonnull_all + bool Unmount(const char *uri); + + /* virtual methods from class Database */ virtual bool Open(Error &error) override; virtual void Close() override; - virtual Song *GetSong(const char *uri_utf8, - Error &error) const override; - virtual void ReturnSong(Song *song) const; + virtual const LightSong *GetSong(const char *uri_utf8, + Error &error) const override; + virtual void ReturnSong(const LightSong *song) const; virtual bool Visit(const DatabaseSelection &selection, VisitDirectory visit_directory, @@ -70,8 +121,8 @@ public: Error &error) const override; virtual bool VisitUniqueTags(const DatabaseSelection &selection, - TagType tag_type, - VisitString visit_string, + TagType tag_type, uint32_t group_mask, + VisitTag visit_tag, Error &error) const override; virtual bool GetStats(const DatabaseSelection &selection, @@ -82,7 +133,7 @@ public: return mtime; } -protected: +private: bool Configure(const config_param ¶m, Error &error); gcc_pure @@ -90,8 +141,7 @@ protected: bool Load(Error &error); - gcc_pure - const Directory *LookupDirectory(const char *uri) const; + Database *LockUmountSteal(const char *uri); }; extern const DatabasePlugin simple_db_plugin; diff --git a/src/db/plugins/simple/Song.cxx b/src/db/plugins/simple/Song.cxx new file mode 100644 index 000000000..3bd3d8316 --- /dev/null +++ b/src/db/plugins/simple/Song.cxx @@ -0,0 +1,111 @@ +/* + * Copyright (C) 2003-2014 The Music Player Daemon Project + * http://www.musicpd.org + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#include "config.h" +#include "Song.hxx" +#include "Directory.hxx" +#include "tag/Tag.hxx" +#include "util/VarSize.hxx" +#include "DetachedSong.hxx" +#include "db/LightSong.hxx" + +#include <assert.h> +#include <string.h> +#include <stdlib.h> + +inline Song::Song(const char *_uri, size_t uri_length, Directory &_parent) + :parent(&_parent), mtime(0), start_ms(0), end_ms(0) +{ + memcpy(uri, _uri, uri_length + 1); +} + +inline Song::~Song() +{ +} + +static Song * +song_alloc(const char *uri, Directory &parent) +{ + size_t uri_length; + + assert(uri); + uri_length = strlen(uri); + assert(uri_length); + + return NewVarSize<Song>(sizeof(Song::uri), + uri_length + 1, + uri, uri_length, parent); +} + +Song * +Song::NewFrom(DetachedSong &&other, Directory &parent) +{ + Song *song = song_alloc(other.GetURI(), parent); + song->tag = std::move(other.WritableTag()); + song->mtime = other.GetLastModified(); + song->start_ms = other.GetStartMS(); + song->end_ms = other.GetEndMS(); + return song; +} + +Song * +Song::NewFile(const char *path, Directory &parent) +{ + return song_alloc(path, parent); +} + +void +Song::Free() +{ + DeleteVarSize(this); +} + +std::string +Song::GetURI() const +{ + assert(*uri); + + if (parent->IsRoot()) + return std::string(uri); + else { + const char *path = parent->GetPath(); + + std::string result; + result.reserve(strlen(path) + 1 + strlen(uri)); + result.assign(path); + result.push_back('/'); + result.append(uri); + return result; + } +} + +LightSong +Song::Export() const +{ + LightSong dest; + dest.directory = parent->IsRoot() + ? nullptr : parent->GetPath(); + dest.uri = uri; + dest.real_uri = nullptr; + dest.tag = &tag; + dest.mtime = mtime; + dest.start_ms = start_ms; + dest.end_ms = end_ms; + return dest; +} diff --git a/src/db/plugins/simple/Song.hxx b/src/db/plugins/simple/Song.hxx new file mode 100644 index 000000000..b2e85aa6b --- /dev/null +++ b/src/db/plugins/simple/Song.hxx @@ -0,0 +1,129 @@ +/* + * Copyright (C) 2003-2014 The Music Player Daemon Project + * http://www.musicpd.org + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#ifndef MPD_SONG_HXX +#define MPD_SONG_HXX + +#include "tag/Tag.hxx" +#include "Compiler.h" + +#include <boost/intrusive/list.hpp> + +#include <string> + +#include <assert.h> +#include <time.h> + +struct LightSong; +struct Directory; +class DetachedSong; +class Storage; + +/** + * A song file inside the configured music directory. Internal + * #SimpleDatabase class. + */ +struct Song { + static constexpr auto link_mode = boost::intrusive::normal_link; + typedef boost::intrusive::link_mode<link_mode> LinkMode; + typedef boost::intrusive::list_member_hook<LinkMode> Hook; + + struct Disposer { + void operator()(Song *song) const { + song->Free(); + } + }; + + /** + * Pointers to the siblings of this directory within the + * parent directory. It is unused (undefined) if this song is + * not in the database. + * + * This attribute is protected with the global #db_mutex. + * Read access in the update thread does not need protection. + */ + Hook siblings; + + Tag tag; + + /** + * The #Directory that contains this song. Must be + * non-nullptr. directory this way. + */ + Directory *const parent; + + time_t mtime; + + /** + * Start of this sub-song within the file in milliseconds. + */ + unsigned start_ms; + + /** + * End of this sub-song within the file in milliseconds. + * Unused if zero. + */ + unsigned end_ms; + + /** + * The file name. + */ + char uri[sizeof(int)]; + + Song(const char *_uri, size_t uri_length, Directory &parent); + ~Song(); + + gcc_malloc + static Song *NewFrom(DetachedSong &&other, Directory &parent); + + /** allocate a new song with a local file name */ + gcc_malloc + static Song *NewFile(const char *path_utf8, Directory &parent); + + /** + * allocate a new song structure with a local file name and attempt to + * load its metadata. If all decoder plugin fail to read its meta + * data, nullptr is returned. + */ + gcc_malloc + static Song *LoadFile(Storage &storage, const char *name_utf8, + Directory &parent); + + void Free(); + + bool UpdateFile(Storage &storage); + bool UpdateFileInArchive(const Storage &storage); + + /** + * Returns the URI of the song in UTF-8 encoding, including its + * location within the music directory. + */ + gcc_pure + std::string GetURI() const; + + gcc_pure + LightSong Export() const; +}; + +typedef boost::intrusive::list<Song, + boost::intrusive::member_hook<Song, Song::Hook, + &Song::siblings>, + boost::intrusive::constant_time_size<false>> SongList; + +#endif diff --git a/src/db/plugins/simple/SongSort.cxx b/src/db/plugins/simple/SongSort.cxx new file mode 100644 index 000000000..4b7144937 --- /dev/null +++ b/src/db/plugins/simple/SongSort.cxx @@ -0,0 +1,108 @@ +/* + * Copyright (C) 2003-2014 The Music Player Daemon Project + * http://www.musicpd.org + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#include "config.h" +#include "SongSort.hxx" +#include "Song.hxx" +#include "tag/Tag.hxx" +#include "lib/icu/Collate.hxx" + +#include <stdlib.h> + +static int +compare_utf8_string(const char *a, const char *b) +{ + if (a == nullptr) + return b == nullptr ? 0 : -1; + + if (b == nullptr) + return 1; + + return IcuCollate(a, b); +} + +/** + * Compare two string tag values, ignoring case. Either one may be + * nullptr. + */ +static int +compare_string_tag_item(const Tag &a, const Tag &b, + TagType type) +{ + return compare_utf8_string(a.GetValue(type), + b.GetValue(type)); +} + +/** + * Compare two tag values which should contain an integer value + * (e.g. disc or track number). Either one may be nullptr. + */ +static int +compare_number_string(const char *a, const char *b) +{ + long ai = a == nullptr ? 0 : strtol(a, nullptr, 10); + long bi = b == nullptr ? 0 : strtol(b, nullptr, 10); + + if (ai <= 0) + return bi <= 0 ? 0 : -1; + + if (bi <= 0) + return 1; + + return ai - bi; +} + +static int +compare_tag_item(const Tag &a, const Tag &b, TagType type) +{ + return compare_number_string(a.GetValue(type), + b.GetValue(type)); +} + +/* Only used for sorting/searchin a songvec, not general purpose compares */ +gcc_pure +static bool +song_cmp(const Song &a, const Song &b) +{ + int ret; + + /* first sort by album */ + ret = compare_string_tag_item(a.tag, b.tag, TAG_ALBUM); + if (ret != 0) + return ret < 0; + + /* then sort by disc */ + ret = compare_tag_item(a.tag, b.tag, TAG_DISC); + if (ret != 0) + return ret < 0; + + /* then by track number */ + ret = compare_tag_item(a.tag, b.tag, TAG_TRACK); + if (ret != 0) + return ret < 0; + + /* still no difference? compare file name */ + return IcuCollate(a.uri, b.uri) < 0; +} + +void +song_list_sort(SongList &songs) +{ + songs.sort(song_cmp); +} diff --git a/src/db/plugins/simple/SongSort.hxx b/src/db/plugins/simple/SongSort.hxx new file mode 100644 index 000000000..2a0c4383b --- /dev/null +++ b/src/db/plugins/simple/SongSort.hxx @@ -0,0 +1,30 @@ +/* + * Copyright (C) 2003-2014 The Music Player Daemon Project + * http://www.musicpd.org + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#ifndef MPD_SONG_SORT_HXX +#define MPD_SONG_SORT_HXX + +#include "Song.hxx" + +struct list_head; + +void +song_list_sort(SongList &songs); + +#endif diff --git a/src/db/plugins/upnp/ContentDirectoryService.cxx b/src/db/plugins/upnp/ContentDirectoryService.cxx new file mode 100644 index 000000000..c097f7644 --- /dev/null +++ b/src/db/plugins/upnp/ContentDirectoryService.cxx @@ -0,0 +1,204 @@ +/* + * Copyright (C) 2003-2014 The Music Player Daemon Project + * http://www.musicpd.org + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#include "config.h" +#include "lib/upnp/ContentDirectoryService.hxx" +#include "lib/upnp/Domain.hxx" +#include "lib/upnp/ixmlwrap.hxx" +#include "lib/upnp/Action.hxx" +#include "Directory.hxx" +#include "util/NumberParser.hxx" +#include "util/Error.hxx" + +#include <stdio.h> + +static bool +ReadResultTag(UPnPDirContent &dirbuf, IXML_Document *response, Error &error) +{ + const char *p = ixmlwrap::getFirstElementValue(response, "Result"); + if (p == nullptr) + p = ""; + + return dirbuf.parse(p, error); +} + +inline bool +ContentDirectoryService::readDirSlice(UpnpClient_Handle hdl, + const char *objectId, unsigned offset, + unsigned count, UPnPDirContent &dirbuf, + unsigned &didreadp, unsigned &totalp, + Error &error) const +{ + // Create request + char ofbuf[100], cntbuf[100]; + sprintf(ofbuf, "%u", offset); + sprintf(cntbuf, "%u", count); + // Some devices require an empty SortCriteria, else bad params + IXML_Document *request = + MakeActionHelper("Browse", m_serviceType.c_str(), + "ObjectID", objectId, + "BrowseFlag", "BrowseDirectChildren", + "Filter", "*", + "SortCriteria", "", + "StartingIndex", ofbuf, + "RequestedCount", cntbuf); + if (request == nullptr) { + error.Set(upnp_domain, "UpnpMakeAction() failed"); + return false; + } + + IXML_Document *response; + int code = UpnpSendAction(hdl, m_actionURL.c_str(), m_serviceType.c_str(), + 0 /*devUDN*/, request, &response); + ixmlDocument_free(request); + if (code != UPNP_E_SUCCESS) { + error.Format(upnp_domain, code, + "UpnpSendAction() failed: %s", + UpnpGetErrorMessage(code)); + return false; + } + + const char *value = ixmlwrap::getFirstElementValue(response, "NumberReturned"); + didreadp = value != nullptr + ? ParseUnsigned(value) + : 0; + + value = ixmlwrap::getFirstElementValue(response, "TotalMatches"); + if (value != nullptr) + totalp = ParseUnsigned(value); + + bool success = ReadResultTag(dirbuf, response, error); + ixmlDocument_free(response); + return success; +} + +bool +ContentDirectoryService::readDir(UpnpClient_Handle handle, + const char *objectId, + UPnPDirContent &dirbuf, + Error &error) const +{ + unsigned offset = 0, total = -1, count; + + do { + if (!readDirSlice(handle, objectId, offset, m_rdreqcnt, dirbuf, + count, total, error)) + return false; + + offset += count; + } while (count > 0 && offset < total); + + return true; +} + +bool +ContentDirectoryService::search(UpnpClient_Handle hdl, + const char *objectId, + const char *ss, + UPnPDirContent &dirbuf, + Error &error) const +{ + unsigned offset = 0, total = -1, count; + + do { + char ofbuf[100]; + sprintf(ofbuf, "%d", offset); + + IXML_Document *request = + MakeActionHelper("Search", m_serviceType.c_str(), + "ContainerID", objectId, + "SearchCriteria", ss, + "Filter", "*", + "SortCriteria", "", + "StartingIndex", ofbuf, + "RequestedCount", "0"); // Setting a value here gets twonky into fits + if (request == 0) { + error.Set(upnp_domain, "UpnpMakeAction() failed"); + return false; + } + + IXML_Document *response; + auto code = UpnpSendAction(hdl, m_actionURL.c_str(), + m_serviceType.c_str(), + 0 /*devUDN*/, request, &response); + ixmlDocument_free(request); + if (code != UPNP_E_SUCCESS) { + error.Format(upnp_domain, code, + "UpnpSendAction() failed: %s", + UpnpGetErrorMessage(code)); + return false; + } + + const char *value = + ixmlwrap::getFirstElementValue(response, "NumberReturned"); + count = value != nullptr + ? ParseUnsigned(value) + : 0; + + offset += count; + + value = ixmlwrap::getFirstElementValue(response, "TotalMatches"); + if (value != nullptr) + total = ParseUnsigned(value); + + bool success = ReadResultTag(dirbuf, response, error); + ixmlDocument_free(response); + if (!success) + return false; + } while (count > 0 && offset < total); + + return true; +} + +bool +ContentDirectoryService::getMetadata(UpnpClient_Handle hdl, + const char *objectId, + UPnPDirContent &dirbuf, + Error &error) const +{ + // Create request + IXML_Document *request = + MakeActionHelper("Browse", m_serviceType.c_str(), + "ObjectID", objectId, + "BrowseFlag", "BrowseMetadata", + "Filter", "*", + "SortCriteria", "", + "StartingIndex", "0", + "RequestedCount", "1"); + if (request == nullptr) { + error.Set(upnp_domain, "UpnpMakeAction() failed"); + return false; + } + + IXML_Document *response; + auto code = UpnpSendAction(hdl, m_actionURL.c_str(), + m_serviceType.c_str(), + 0 /*devUDN*/, request, &response); + ixmlDocument_free(request); + if (code != UPNP_E_SUCCESS) { + error.Format(upnp_domain, code, + "UpnpSendAction() failed: %s", + UpnpGetErrorMessage(code)); + return false; + } + + bool success = ReadResultTag(dirbuf, response, error); + ixmlDocument_free(response); + return success; +} diff --git a/src/db/plugins/upnp/Directory.cxx b/src/db/plugins/upnp/Directory.cxx new file mode 100644 index 000000000..e43cd48a6 --- /dev/null +++ b/src/db/plugins/upnp/Directory.cxx @@ -0,0 +1,262 @@ +/* + * Copyright (C) 2003-2014 The Music Player Daemon Project + * http://www.musicpd.org + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#include "config.h" +#include "Directory.hxx" +#include "lib/upnp/Util.hxx" +#include "lib/expat/ExpatParser.hxx" +#include "Tags.hxx" +#include "tag/TagBuilder.hxx" +#include "tag/TagTable.hxx" +#include "util/NumberParser.hxx" + +#include <algorithm> +#include <string> + +#include <string.h> + +UPnPDirContent::~UPnPDirContent() +{ + /* this destructor exists here just so it won't get inlined */ +} + +gcc_pure gcc_nonnull_all +static bool +CompareStringLiteral(const char *literal, const char *value, size_t length) +{ + return length == strlen(literal) && + memcmp(literal, value, length) == 0; +} + +gcc_pure +static UPnPDirObject::ItemClass +ParseItemClass(const char *name, size_t length) +{ + if (CompareStringLiteral("object.item.audioItem.musicTrack", + name, length)) + return UPnPDirObject::ItemClass::MUSIC; + else if (CompareStringLiteral("object.item.playlistItem", + name, length)) + return UPnPDirObject::ItemClass::PLAYLIST; + else + return UPnPDirObject::ItemClass::UNKNOWN; +} + +gcc_pure +static int +ParseDuration(const char *duration) +{ + char *endptr; + + unsigned result = ParseUnsigned(duration, &endptr); + if (endptr == duration || *endptr != ':') + return 0; + + result *= 60; + duration = endptr + 1; + result += ParseUnsigned(duration, &endptr); + if (endptr == duration || *endptr != ':') + return 0; + + result *= 60; + duration = endptr + 1; + result += ParseUnsigned(duration, &endptr); + if (endptr == duration || *endptr != 0) + return 0; + + return result; +} + +/** + * Transform titles to turn '/' into '_' to make them acceptable path + * elements. There is a very slight risk of collision in doing + * this. Twonky returns directory names (titles) like 'Artist/Album'. + */ +gcc_pure +static std::string +titleToPathElt(std::string &&s) +{ + std::replace(s.begin(), s.end(), '/', '_'); + return s; +} + +/** + * An XML parser which builds directory contents from DIDL lite input. + */ +class UPnPDirParser final : public CommonExpatParser { + UPnPDirContent &m_dir; + + enum { + NONE, + RES, + CLASS, + } state; + + /** + * If not equal to #TAG_NUM_OF_ITEM_TYPES, then we're + * currently reading an element containing a tag value. The + * value is being constructed in #value. + */ + TagType tag_type; + + /** + * The text inside the current element. + */ + std::string value; + + UPnPDirObject m_tobj; + TagBuilder tag; + +public: + UPnPDirParser(UPnPDirContent& dir) + :m_dir(dir), + state(NONE), + tag_type(TAG_NUM_OF_ITEM_TYPES) + { + } + +protected: + virtual void StartElement(const XML_Char *name, const XML_Char **attrs) + { + if (m_tobj.type != UPnPDirObject::Type::UNKNOWN && + tag_type == TAG_NUM_OF_ITEM_TYPES) { + tag_type = tag_table_lookup(upnp_tags, name); + if (tag_type != TAG_NUM_OF_ITEM_TYPES) + return; + } else { + assert(tag_type == TAG_NUM_OF_ITEM_TYPES); + } + + switch (name[0]) { + case 'c': + if (!strcmp(name, "container")) { + m_tobj.clear(); + m_tobj.type = UPnPDirObject::Type::CONTAINER; + + const char *id = GetAttribute(attrs, "id"); + if (id != nullptr) + m_tobj.m_id = id; + + const char *pid = GetAttribute(attrs, "parentID"); + if (pid != nullptr) + m_tobj.m_pid = pid; + } + break; + + case 'i': + if (!strcmp(name, "item")) { + m_tobj.clear(); + m_tobj.type = UPnPDirObject::Type::ITEM; + + const char *id = GetAttribute(attrs, "id"); + if (id != nullptr) + m_tobj.m_id = id; + + const char *pid = GetAttribute(attrs, "parentID"); + if (pid != nullptr) + m_tobj.m_pid = pid; + } + break; + + case 'r': + if (!strcmp(name, "res")) { + // <res protocolInfo="http-get:*:audio/mpeg:*" size="5171496" + // bitrate="24576" duration="00:03:35" sampleFrequency="44100" + // nrAudioChannels="2"> + + const char *duration = + GetAttribute(attrs, "duration"); + if (duration != nullptr) + tag.SetTime(ParseDuration(duration)); + + state = RES; + } + + break; + + case 'u': + if (strcmp(name, "upnp:class") == 0) + state = CLASS; + } + } + + bool checkobjok() { + if (m_tobj.m_id.empty() || m_tobj.m_pid.empty() || + m_tobj.name.empty() || + (m_tobj.type == UPnPDirObject::Type::ITEM && + m_tobj.item_class == UPnPDirObject::ItemClass::UNKNOWN)) + return false; + + return true; + } + + virtual void EndElement(const XML_Char *name) + { + if (tag_type != TAG_NUM_OF_ITEM_TYPES) { + assert(m_tobj.type != UPnPDirObject::Type::UNKNOWN); + + tag.AddItem(tag_type, value.c_str()); + + if (tag_type == TAG_TITLE) + m_tobj.name = titleToPathElt(std::move(value)); + + value.clear(); + tag_type = TAG_NUM_OF_ITEM_TYPES; + return; + } + + if ((!strcmp(name, "container") || !strcmp(name, "item")) && + checkobjok()) { + tag.Commit(m_tobj.tag); + m_dir.objects.emplace_back(std::move(m_tobj)); + } + + state = NONE; + } + + virtual void CharacterData(const XML_Char *s, int len) + { + if (tag_type != TAG_NUM_OF_ITEM_TYPES) { + assert(m_tobj.type != UPnPDirObject::Type::UNKNOWN); + + value.append(s, len); + return; + } + + switch (state) { + case NONE: + break; + + case RES: + m_tobj.url.assign(s, len); + break; + + case CLASS: + m_tobj.item_class = ParseItemClass(s, len); + break; + } + } +}; + +bool +UPnPDirContent::parse(const char *input, Error &error) +{ + UPnPDirParser parser(*this); + return parser.Parse(input, strlen(input), true, error); +} diff --git a/src/db/plugins/upnp/Directory.hxx b/src/db/plugins/upnp/Directory.hxx new file mode 100644 index 000000000..433979900 --- /dev/null +++ b/src/db/plugins/upnp/Directory.hxx @@ -0,0 +1,66 @@ +/* + * Copyright (C) 2003-2014 The Music Player Daemon Project + * http://www.musicpd.org + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#ifndef MPD_UPNP_DIRECTORY_HXX +#define MPD_UPNP_DIRECTORY_HXX + +#include "Object.hxx" +#include "Compiler.h" + +#include <string> +#include <vector> + +class Error; + +/** + * Image of a MediaServer Directory Service container (directory), + * possibly containing items and subordinate containers. + */ +class UPnPDirContent { +public: + std::vector<UPnPDirObject> objects; + + ~UPnPDirContent(); + + gcc_pure + UPnPDirObject *FindObject(const char *name) { + for (auto &o : objects) + if (o.name == name) + return &o; + + return nullptr; + } + + /** + * Parse from DIDL-Lite XML data. + * + * Normally only used by ContentDirectoryService::readDir() + * This is cumulative: in general, the XML data is obtained in + * several documents corresponding to (offset,count) slices of the + * directory (container). parse() can be called repeatedly with + * the successive XML documents and will accumulate entries in the item + * and container vectors. This makes more sense if the different + * chunks are from the same container, but given that UPnP Ids are + * actually global, nothing really bad will happen if you mix + * up... + */ + bool parse(const char *didltext, Error &error); +}; + +#endif /* _UPNPDIRCONTENT_H_X_INCLUDED_ */ diff --git a/src/db/plugins/upnp/Object.cxx b/src/db/plugins/upnp/Object.cxx new file mode 100644 index 000000000..703fb0be4 --- /dev/null +++ b/src/db/plugins/upnp/Object.cxx @@ -0,0 +1,25 @@ +/* + * Copyright (C) 2003-2014 The Music Player Daemon Project + * http://www.musicpd.org + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#include "Object.hxx" + +UPnPDirObject::~UPnPDirObject() +{ + /* this destructor exists here just so it won't get inlined */ +} diff --git a/src/db/plugins/upnp/Object.hxx b/src/db/plugins/upnp/Object.hxx new file mode 100644 index 000000000..16a66c774 --- /dev/null +++ b/src/db/plugins/upnp/Object.hxx @@ -0,0 +1,85 @@ +/* + * Copyright (C) 2003-2014 The Music Player Daemon Project + * http://www.musicpd.org + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#ifndef MPD_UPNP_OBJECT_HXX +#define MPD_UPNP_OBJECT_HXX + +#include "tag/Tag.hxx" + +#include <string> + +/** + * UpnP Media Server directory entry, converted from XML data. + * + * This is a dumb data holder class, a struct with helpers. + */ +class UPnPDirObject { +public: + enum class Type { + UNKNOWN, + ITEM, + CONTAINER, + }; + + // There are actually several kinds of containers: + // object.container.storageFolder, object.container.person, + // object.container.playlistContainer etc., but they all seem to + // behave the same as far as we're concerned. Otoh, musicTrack + // items are special to us, and so should playlists, but I've not + // seen one of the latter yet (servers seem to use containers for + // playlists). + enum class ItemClass { + UNKNOWN, + MUSIC, + PLAYLIST, + }; + + std::string m_id; // ObjectId + std::string m_pid; // Parent ObjectId + std::string url; + + /** + * A copy of "dc:title" sanitized as a file name. + */ + std::string name; + + Type type; + ItemClass item_class; + + Tag tag; + + UPnPDirObject() = default; + UPnPDirObject(UPnPDirObject &&) = default; + + ~UPnPDirObject(); + + UPnPDirObject &operator=(UPnPDirObject &&) = default; + + void clear() + { + m_id.clear(); + m_pid.clear(); + url.clear(); + type = Type::UNKNOWN; + item_class = ItemClass::UNKNOWN; + tag.Clear(); + } +}; + +#endif /* _UPNPDIRCONTENT_H_X_INCLUDED_ */ diff --git a/src/db/plugins/upnp/Tags.cxx b/src/db/plugins/upnp/Tags.cxx new file mode 100644 index 000000000..fd65df4d0 --- /dev/null +++ b/src/db/plugins/upnp/Tags.cxx @@ -0,0 +1,33 @@ +/* + * Copyright (C) 2003-2014 The Music Player Daemon Project + * http://www.musicpd.org + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#include "config.h" +#include "Tags.hxx" +#include "tag/TagTable.hxx" + +const struct tag_table upnp_tags[] = { + { "upnp:artist", TAG_ARTIST }, + { "upnp:album", TAG_ALBUM }, + { "upnp:originalTrackNumber", TAG_TRACK }, + { "upnp:genre", TAG_GENRE }, + { "dc:title", TAG_TITLE }, + + /* sentinel */ + { nullptr, TAG_NUM_OF_ITEM_TYPES } +}; diff --git a/src/db/plugins/upnp/Tags.hxx b/src/db/plugins/upnp/Tags.hxx new file mode 100644 index 000000000..ec6d18478 --- /dev/null +++ b/src/db/plugins/upnp/Tags.hxx @@ -0,0 +1,28 @@ +/* + * Copyright (C) 2003-2014 The Music Player Daemon Project + * http://www.musicpd.org + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#ifndef MPD_UPNP_TAGS_HXX +#define MPD_UPNP_TAGS_HXX + +/** + * Map UPnP property names to MPD tags. + */ +extern const struct tag_table upnp_tags[]; + +#endif diff --git a/src/db/plugins/upnp/UpnpDatabasePlugin.cxx b/src/db/plugins/upnp/UpnpDatabasePlugin.cxx new file mode 100644 index 000000000..66951f402 --- /dev/null +++ b/src/db/plugins/upnp/UpnpDatabasePlugin.cxx @@ -0,0 +1,786 @@ +/* + * Copyright (C) 2003-2014 The Music Player Daemon Project + * http://www.musicpd.org + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#include "config.h" +#include "UpnpDatabasePlugin.hxx" +#include "Directory.hxx" +#include "Tags.hxx" +#include "lib/upnp/Domain.hxx" +#include "lib/upnp/ClientInit.hxx" +#include "lib/upnp/Discovery.hxx" +#include "lib/upnp/ContentDirectoryService.hxx" +#include "lib/upnp/Util.hxx" +#include "db/Interface.hxx" +#include "db/DatabasePlugin.hxx" +#include "db/Selection.hxx" +#include "db/DatabaseError.hxx" +#include "db/LightDirectory.hxx" +#include "db/LightSong.hxx" +#include "db/Stats.hxx" +#include "config/ConfigData.hxx" +#include "tag/TagBuilder.hxx" +#include "tag/TagTable.hxx" +#include "util/Error.hxx" +#include "util/Domain.hxx" +#include "fs/Traits.hxx" +#include "Log.hxx" +#include "SongFilter.hxx" + +#include <string> +#include <vector> +#include <set> + +#include <assert.h> +#include <string.h> + +static const char *const rootid = "0"; + +class UpnpSong : public LightSong { + std::string uri2, real_uri2; + + Tag tag2; + +public: + UpnpSong(UPnPDirObject &&object, std::string &&_uri) + :uri2(std::move(_uri)), + real_uri2(std::move(object.url)), + tag2(std::move(object.tag)) { + directory = nullptr; + uri = uri2.c_str(); + real_uri = real_uri2.c_str(); + tag = &tag2; + mtime = 0; + start_ms = end_ms = 0; + } +}; + +class UpnpDatabase : public Database { + UpnpClient_Handle handle; + UPnPDeviceDirectory *discovery; + +public: + UpnpDatabase():Database(upnp_db_plugin) {} + + static Database *Create(EventLoop &loop, DatabaseListener &listener, + const config_param ¶m, + Error &error); + + virtual bool Open(Error &error) override; + virtual void Close() override; + virtual const LightSong *GetSong(const char *uri_utf8, + Error &error) const override; + virtual void ReturnSong(const LightSong *song) const; + + virtual bool Visit(const DatabaseSelection &selection, + VisitDirectory visit_directory, + VisitSong visit_song, + VisitPlaylist visit_playlist, + Error &error) const override; + + virtual bool VisitUniqueTags(const DatabaseSelection &selection, + TagType tag_type, uint32_t group_mask, + VisitTag visit_tag, + Error &error) const override; + + virtual bool GetStats(const DatabaseSelection &selection, + DatabaseStats &stats, + Error &error) const override; + virtual time_t GetUpdateStamp() const {return 0;} + +protected: + bool Configure(const config_param ¶m, Error &error); + +private: + bool VisitServer(const ContentDirectoryService &server, + const std::list<std::string> &vpath, + const DatabaseSelection &selection, + VisitDirectory visit_directory, + VisitSong visit_song, + VisitPlaylist visit_playlist, + Error &error) const; + + /** + * Run an UPnP search according to MPD parameters, and + * visit_song the results. + */ + bool SearchSongs(const ContentDirectoryService &server, + const char *objid, + const DatabaseSelection &selection, + VisitSong visit_song, + Error &error) const; + + bool SearchSongs(const ContentDirectoryService &server, + const char *objid, + const DatabaseSelection &selection, + UPnPDirContent& dirbuf, + Error &error) const; + + bool Namei(const ContentDirectoryService &server, + const std::list<std::string> &vpath, + UPnPDirObject &dirent, + Error &error) const; + + /** + * Take server and objid, return metadata. + */ + bool ReadNode(const ContentDirectoryService &server, + const char *objid, UPnPDirObject& dirent, + Error &error) const; + + /** + * Get the path for an object Id. This works much like pwd, + * except easier cause our inodes have a parent id. Not used + * any more actually (see comments in SearchSongs). + */ + bool BuildPath(const ContentDirectoryService &server, + const UPnPDirObject& dirent, std::string &idpath, + Error &error) const; +}; + +Database * +UpnpDatabase::Create(gcc_unused EventLoop &loop, + gcc_unused DatabaseListener &listener, + const config_param ¶m, Error &error) +{ + UpnpDatabase *db = new UpnpDatabase(); + if (!db->Configure(param, error)) { + delete db; + return nullptr; + } + + /* libupnp loses its ability to receive multicast messages + apparently due to daemonization; using the LazyDatabase + wrapper works around this problem */ + return db; +} + +inline bool +UpnpDatabase::Configure(const config_param &, Error &) +{ + return true; +} + +bool +UpnpDatabase::Open(Error &error) +{ + if (!UpnpClientGlobalInit(handle, error)) + return false; + + discovery = new UPnPDeviceDirectory(handle); + if (!discovery->Start(error)) { + delete discovery; + UpnpClientGlobalFinish(); + return false; + } + + return true; +} + +void +UpnpDatabase::Close() +{ + delete discovery; + UpnpClientGlobalFinish(); +} + +void +UpnpDatabase::ReturnSong(const LightSong *_song) const +{ + assert(_song != nullptr); + + UpnpSong *song = (UpnpSong *)const_cast<LightSong *>(_song); + delete song; +} + +// Get song info by path. We can receive either the id path, or the titles +// one +const LightSong * +UpnpDatabase::GetSong(const char *uri, Error &error) const +{ + auto vpath = stringToTokens(uri, "/", true); + if (vpath.size() < 2) { + error.Format(db_domain, DB_NOT_FOUND, "No such song: %s", uri); + return nullptr; + } + + ContentDirectoryService server; + if (!discovery->getServer(vpath.front().c_str(), server, error)) + return nullptr; + + vpath.pop_front(); + + UPnPDirObject dirent; + if (vpath.front() != rootid) { + if (!Namei(server, vpath, dirent, error)) + return nullptr; + } else { + if (!ReadNode(server, vpath.back().c_str(), dirent, + error)) + return nullptr; + } + + return new UpnpSong(std::move(dirent), uri); +} + +/** + * Double-quote a string, adding internal backslash escaping. + */ +static void +dquote(std::string &out, const char *in) +{ + out.push_back('"'); + + for (; *in != 0; ++in) { + switch(*in) { + case '\\': + case '"': + out.push_back('\\'); + break; + } + + out.push_back(*in); + } + + out.push_back('"'); +} + +// Run an UPnP search, according to MPD parameters. Return results as +// UPnP items +bool +UpnpDatabase::SearchSongs(const ContentDirectoryService &server, + const char *objid, + const DatabaseSelection &selection, + UPnPDirContent &dirbuf, + Error &error) const +{ + const SongFilter *filter = selection.filter; + if (selection.filter == nullptr) + return true; + + std::list<std::string> searchcaps; + if (!server.getSearchCapabilities(handle, searchcaps, error)) + return false; + + if (searchcaps.empty()) + return true; + + std::string cond; + for (const auto &item : filter->GetItems()) { + switch (auto tag = item.GetTag()) { + case LOCATE_TAG_ANY_TYPE: + { + if (!cond.empty()) { + cond += " and "; + } + cond += '('; + bool first(true); + for (const auto& cap : searchcaps) { + if (first) + first = false; + else + cond += " or "; + cond += cap; + if (item.GetFoldCase()) { + cond += " contains "; + } else { + cond += " = "; + } + dquote(cond, item.GetValue().c_str()); + } + cond += ')'; + } + break; + + default: + /* Unhandled conditions like + LOCATE_TAG_BASE_TYPE or + LOCATE_TAG_FILE_TYPE won't have a + corresponding upnp prop, so they will be + skipped */ + if (tag == TAG_ALBUM_ARTIST) + tag = TAG_ARTIST; + + // TODO: support LOCATE_TAG_ANY_TYPE etc. + const char *name = tag_table_lookup(upnp_tags, + TagType(tag)); + if (name == nullptr) + continue; + + if (!cond.empty()) { + cond += " and "; + } + cond += name; + + /* FoldCase doubles up as contains/equal + switch. UpNP search is supposed to be + case-insensitive, but at least some servers + have the same convention as mpd (e.g.: + minidlna) */ + if (item.GetFoldCase()) { + cond += " contains "; + } else { + cond += " = "; + } + dquote(cond, item.GetValue().c_str()); + } + } + + return server.search(handle, + objid, cond.c_str(), dirbuf, + error); +} + +static bool +visitSong(const UPnPDirObject &meta, const char *path, + const DatabaseSelection &selection, + VisitSong visit_song, Error& error) +{ + if (!visit_song) + return true; + + LightSong song; + song.directory = nullptr; + song.uri = path; + song.real_uri = meta.url.c_str(); + song.tag = &meta.tag; + song.mtime = 0; + song.start_ms = song.end_ms = 0; + + return !selection.Match(song) || visit_song(song, error); +} + +/** + * Build synthetic path based on object id for search results. The use + * of "rootid" is arbitrary, any name that is not likely to be a top + * directory name would fit. + */ +static std::string +songPath(const std::string &servername, + const std::string &objid) +{ + return servername + "/" + rootid + "/" + objid; +} + +bool +UpnpDatabase::SearchSongs(const ContentDirectoryService &server, + const char *objid, + const DatabaseSelection &selection, + VisitSong visit_song, + Error &error) const +{ + UPnPDirContent dirbuf; + if (!visit_song) + return true; + if (!SearchSongs(server, objid, selection, dirbuf, error)) + return false; + + for (auto &dirent : dirbuf.objects) { + if (dirent.type != UPnPDirObject::Type::ITEM || + dirent.item_class != UPnPDirObject::ItemClass::MUSIC) + continue; + + // We get song ids as the result of the UPnP search. But our + // client expects paths (e.g. we get 1$4$3788 from minidlna, + // but we need to translate to /Music/All_Music/Satisfaction). + // We can do this in two ways: + // - Rebuild a normal path using BuildPath() which is a kind of pwd + // - Build a bogus path based on the song id. + // The first method is nice because the returned paths are pretty, but + // it has two big problems: + // - The song paths are ambiguous: e.g. minidlna returns all search + // results as being from the "All Music" directory, which can + // contain several songs with the same title (but different objids) + // - The performance of BuildPath() is atrocious on very big + // directories, even causing timeouts in clients. And of + // course, 'All Music' is very big. + // So we return synthetic and ugly paths based on the object id, + // which we later have to detect. + const std::string path = songPath(server.getFriendlyName(), + dirent.m_id); + if (!visitSong(std::move(dirent), path.c_str(), + selection, visit_song, + error)) + return false; + } + + return true; +} + +bool +UpnpDatabase::ReadNode(const ContentDirectoryService &server, + const char *objid, UPnPDirObject &dirent, + Error &error) const +{ + UPnPDirContent dirbuf; + if (!server.getMetadata(handle, objid, dirbuf, error)) + return false; + + if (dirbuf.objects.size() == 1) { + dirent = std::move(dirbuf.objects.front()); + } else { + error.Format(upnp_domain, "Bad resource"); + return false; + } + + return true; +} + +bool +UpnpDatabase::BuildPath(const ContentDirectoryService &server, + const UPnPDirObject& idirent, + std::string &path, + Error &error) const +{ + const char *pid = idirent.m_id.c_str(); + path.clear(); + UPnPDirObject dirent; + while (strcmp(pid, rootid) != 0) { + if (!ReadNode(server, pid, dirent, error)) + return false; + pid = dirent.m_pid.c_str(); + + if (path.empty()) + path = dirent.name; + else + path = PathTraitsUTF8::Build(dirent.name.c_str(), + path.c_str()); + } + + path = PathTraitsUTF8::Build(server.getFriendlyName(), + path.c_str()); + return true; +} + +// Take server and internal title pathname and return objid and metadata. +bool +UpnpDatabase::Namei(const ContentDirectoryService &server, + const std::list<std::string> &vpath, + UPnPDirObject &odirent, + Error &error) const +{ + if (vpath.empty()) { + // looking for root info + if (!ReadNode(server, rootid, odirent, error)) + return false; + + return true; + } + + std::string objid(rootid); + + // Walk the path elements, read each directory and try to find the next one + for (auto i = vpath.begin(), last = std::prev(vpath.end());; ++i) { + UPnPDirContent dirbuf; + if (!server.readDir(handle, objid.c_str(), dirbuf, error)) + return false; + + // Look for the name in the sub-container list + UPnPDirObject *child = dirbuf.FindObject(i->c_str()); + if (child == nullptr) { + error.Format(db_domain, DB_NOT_FOUND, + "No such object"); + return false; + } + + if (i == last) { + odirent = std::move(*child); + return true; + } + + if (child->type != UPnPDirObject::Type::CONTAINER) { + error.Format(db_domain, DB_NOT_FOUND, + "Not a container"); + return false; + } + + objid = std::move(child->m_id); + } +} + +static bool +VisitItem(const UPnPDirObject &object, const char *uri, + const DatabaseSelection &selection, + VisitSong visit_song, VisitPlaylist visit_playlist, + Error &error) +{ + assert(object.type == UPnPDirObject::Type::ITEM); + + switch (object.item_class) { + case UPnPDirObject::ItemClass::MUSIC: + return !visit_song || + visitSong(object, uri, + selection, visit_song, error); + + case UPnPDirObject::ItemClass::PLAYLIST: + if (visit_playlist) { + /* Note: I've yet to see a + playlist item (playlists + seem to be usually handled + as containers, so I'll + decide what to do when I + see one... */ + } + + return true; + + case UPnPDirObject::ItemClass::UNKNOWN: + return true; + } + + assert(false); + gcc_unreachable(); +} + +static bool +VisitObject(const UPnPDirObject &object, const char *uri, + const DatabaseSelection &selection, + VisitDirectory visit_directory, + VisitSong visit_song, + VisitPlaylist visit_playlist, + Error &error) +{ + switch (object.type) { + case UPnPDirObject::Type::UNKNOWN: + assert(false); + gcc_unreachable(); + + case UPnPDirObject::Type::CONTAINER: + return !visit_directory || + visit_directory(LightDirectory(uri, 0), error); + + case UPnPDirObject::Type::ITEM: + return VisitItem(object, uri, selection, + visit_song, visit_playlist, + error); + } + + assert(false); + gcc_unreachable(); +} + +// vpath is a parsed and writeable version of selection.uri. There is +// really just one path parameter. +bool +UpnpDatabase::VisitServer(const ContentDirectoryService &server, + const std::list<std::string> &vpath, + const DatabaseSelection &selection, + VisitDirectory visit_directory, + VisitSong visit_song, + VisitPlaylist visit_playlist, + Error &error) const +{ + /* If the path begins with rootid, we know that this is a + song, not a directory (because that's how we set things + up). Just visit it. Note that the choice of rootid is + arbitrary, any value not likely to be the name of a top + directory would be ok. */ + /* !Note: this *can't* be handled by Namei further down, + because the path is not valid for traversal. Besides, it's + just faster to access the target node directly */ + if (!vpath.empty() && vpath.front() == rootid) { + switch (vpath.size()) { + case 1: + return true; + + case 2: + break; + + default: + error.Format(db_domain, DB_NOT_FOUND, + "Not found"); + return false; + } + + if (visit_song) { + UPnPDirObject dirent; + if (!ReadNode(server, vpath.back().c_str(), dirent, + error)) + return false; + + if (dirent.type != UPnPDirObject::Type::ITEM || + dirent.item_class != UPnPDirObject::ItemClass::MUSIC) { + error.Format(db_domain, DB_NOT_FOUND, + "Not found"); + return false; + } + + std::string path = songPath(server.getFriendlyName(), + dirent.m_id); + if (!visitSong(std::move(dirent), path.c_str(), + selection, + visit_song, error)) + return false; + } + return true; + } + + // Translate the target path into an object id and the associated metadata. + UPnPDirObject tdirent; + if (!Namei(server, vpath, tdirent, error)) + return false; + + /* If recursive is set, this is a search... No use sending it + if the filter is empty. In this case, we implement limited + recursion (1-deep) here, which will handle the "add dir" + case. */ + if (selection.recursive && selection.filter) + return SearchSongs(server, tdirent.m_id.c_str(), selection, + visit_song, error); + + const char *const base_uri = selection.uri.empty() + ? server.getFriendlyName() + : selection.uri.c_str(); + + if (tdirent.type == UPnPDirObject::Type::ITEM) { + return VisitItem(tdirent, base_uri, + selection, + visit_song, visit_playlist, + error); + } + + /* Target was a a container. Visit it. We could read slices + and loop here, but it's not useful as mpd will only return + data to the client when we're done anyway. */ + UPnPDirContent dirbuf; + if (!server.readDir(handle, tdirent.m_id.c_str(), dirbuf, + error)) + return false; + + for (auto &dirent : dirbuf.objects) { + const std::string uri = PathTraitsUTF8::Build(base_uri, + dirent.name.c_str()); + if (!VisitObject(dirent, uri.c_str(), + selection, + visit_directory, + visit_song, visit_playlist, + error)) + return false; + } + + return true; +} + +// Deal with the possibly multiple servers, call VisitServer if needed. +bool +UpnpDatabase::Visit(const DatabaseSelection &selection, + VisitDirectory visit_directory, + VisitSong visit_song, + VisitPlaylist visit_playlist, + Error &error) const +{ + auto vpath = stringToTokens(selection.uri, "/", true); + if (vpath.empty()) { + std::vector<ContentDirectoryService> servers; + if (!discovery->getDirServices(servers, error)) + return false; + + for (const auto &server : servers) { + if (visit_directory) { + const LightDirectory d(server.getFriendlyName(), 0); + if (!visit_directory(d, error)) + return false; + } + + if (selection.recursive && + !VisitServer(server, vpath, selection, + visit_directory, visit_song, visit_playlist, + error)) + return false; + } + + return true; + } + + // We do have a path: the first element selects the server + std::string servername(std::move(vpath.front())); + vpath.pop_front(); + + ContentDirectoryService server; + if (!discovery->getServer(servername.c_str(), server, error)) + return false; + + return VisitServer(server, vpath, selection, + visit_directory, visit_song, visit_playlist, error); +} + +bool +UpnpDatabase::VisitUniqueTags(const DatabaseSelection &selection, + TagType tag, gcc_unused uint32_t group_mask, + VisitTag visit_tag, + Error &error) const +{ + // TODO: use group_mask + + if (!visit_tag) + return true; + + std::vector<ContentDirectoryService> servers; + if (!discovery->getDirServices(servers, error)) + return false; + + std::set<std::string> values; + for (auto& server : servers) { + UPnPDirContent dirbuf; + if (!SearchSongs(server, rootid, selection, dirbuf, error)) + return false; + + for (const auto &dirent : dirbuf.objects) { + if (dirent.type != UPnPDirObject::Type::ITEM || + dirent.item_class != UPnPDirObject::ItemClass::MUSIC) + continue; + + const char *value = dirent.tag.GetValue(tag); + if (value != nullptr) { +#if defined(__clang__) || GCC_CHECK_VERSION(4,8) + values.emplace(value); +#else + values.insert(value); +#endif + } + } + } + + for (const auto& value : values) { + TagBuilder builder; + builder.AddItem(tag, value.c_str()); + if (!visit_tag(builder.Commit(), error)) + return false; + } + + return true; +} + +bool +UpnpDatabase::GetStats(const DatabaseSelection &, + DatabaseStats &stats, Error &) const +{ + /* Note: this gets called before the daemonizing so we can't + reallyopen this would be a problem if we had real stats */ + stats.song_count = 0; + stats.total_duration = 0; + stats.artist_count = 0; + stats.album_count = 0; + return true; +} + +const DatabasePlugin upnp_db_plugin = { + "upnp", + 0, + UpnpDatabase::Create, +}; diff --git a/src/db/plugins/upnp/UpnpDatabasePlugin.hxx b/src/db/plugins/upnp/UpnpDatabasePlugin.hxx new file mode 100644 index 000000000..0228405cd --- /dev/null +++ b/src/db/plugins/upnp/UpnpDatabasePlugin.hxx @@ -0,0 +1,27 @@ +/* + * Copyright (C) 2003-2014 The Music Player Daemon Project + * http://www.musicpd.org + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#ifndef MPD_UPNP_DATABASE_PLUGIN_HXX +#define MPD_UPNP_DATABASE_PLUGIN_HXX + +struct DatabasePlugin; + +extern const DatabasePlugin upnp_db_plugin; + +#endif diff --git a/src/db/update/Archive.cxx b/src/db/update/Archive.cxx new file mode 100644 index 000000000..fc8f1fcbf --- /dev/null +++ b/src/db/update/Archive.cxx @@ -0,0 +1,167 @@ +/* + * Copyright (C) 2003-2014 The Music Player Daemon Project + * http://www.musicpd.org + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#include "config.h" /* must be first for large file support */ +#include "Walk.hxx" +#include "UpdateDomain.hxx" +#include "db/DatabaseLock.hxx" +#include "db/plugins/simple/Directory.hxx" +#include "db/plugins/simple/Song.hxx" +#include "storage/StorageInterface.hxx" +#include "fs/AllocatedPath.hxx" +#include "storage/FileInfo.hxx" +#include "archive/ArchiveList.hxx" +#include "archive/ArchivePlugin.hxx" +#include "archive/ArchiveFile.hxx" +#include "archive/ArchiveVisitor.hxx" +#include "util/Error.hxx" +#include "Log.hxx" + +#include <string> + +#include <sys/stat.h> +#include <string.h> + +void +UpdateWalk::UpdateArchiveTree(Directory &directory, const char *name) +{ + const char *tmp = strchr(name, '/'); + if (tmp) { + const std::string child_name(name, tmp); + //add dir is not there already + db_lock(); + Directory *subdir = + directory.MakeChild(child_name.c_str()); + subdir->device = DEVICE_INARCHIVE; + db_unlock(); + + //create directories first + UpdateArchiveTree(*subdir, tmp + 1); + } else { + if (strlen(name) == 0) { + LogWarning(update_domain, + "archive returned directory only"); + return; + } + + //add file + db_lock(); + Song *song = directory.FindSong(name); + db_unlock(); + if (song == nullptr) { + song = Song::LoadFile(storage, name, directory); + if (song != nullptr) { + db_lock(); + directory.AddSong(song); + db_unlock(); + + modified = true; + FormatDefault(update_domain, "added %s/%s", + directory.GetPath(), name); + } + } + } +} + +class UpdateArchiveVisitor final : public ArchiveVisitor { + UpdateWalk &walk; + Directory *directory; + + public: + UpdateArchiveVisitor(UpdateWalk &_walk, Directory *_directory) + :walk(_walk), directory(_directory) {} + + virtual void VisitArchiveEntry(const char *path_utf8) override { + FormatDebug(update_domain, + "adding archive file: %s", path_utf8); + walk.UpdateArchiveTree(*directory, path_utf8); + } +}; + +/** + * Updates the file listing from an archive file. + * + * @param parent the parent directory the archive file resides in + * @param name the UTF-8 encoded base name of the archive file + * @param st stat() information on the archive file + * @param plugin the archive plugin which fits this archive type + */ +void +UpdateWalk::UpdateArchiveFile(Directory &parent, const char *name, + const FileInfo &info, + const ArchivePlugin &plugin) +{ + db_lock(); + Directory *directory = parent.FindChild(name); + db_unlock(); + + if (directory != nullptr && directory->mtime == info.mtime && + !walk_discard) + /* MPD has already scanned the archive, and it hasn't + changed since - don't consider updating it */ + return; + + const auto path_fs = storage.MapChildFS(parent.GetPath(), name); + if (path_fs.IsNull()) + /* not a local file: skip, because the archive API + supports only local files */ + return; + + /* open archive */ + Error error; + ArchiveFile *file = archive_file_open(&plugin, path_fs, error); + if (file == nullptr) { + LogError(error); + if (directory != nullptr) + editor.LockDeleteDirectory(directory); + return; + } + + FormatDebug(update_domain, "archive %s opened", path_fs.c_str()); + + if (directory == nullptr) { + FormatDebug(update_domain, + "creating archive directory: %s", name); + db_lock(); + directory = parent.CreateChild(name); + /* mark this directory as archive (we use device for + this) */ + directory->device = DEVICE_INARCHIVE; + db_unlock(); + } + + directory->mtime = info.mtime; + + UpdateArchiveVisitor visitor(*this, directory); + file->Visit(visitor); + file->Close(); +} + +bool +UpdateWalk::UpdateArchiveFile(Directory &directory, + const char *name, const char *suffix, + const FileInfo &info) +{ + const ArchivePlugin *plugin = archive_plugin_from_suffix(suffix); + if (plugin == nullptr) + return false; + + UpdateArchiveFile(directory, name, info, *plugin); + return true; +} diff --git a/src/db/update/Container.cxx b/src/db/update/Container.cxx new file mode 100644 index 000000000..1c420fa99 --- /dev/null +++ b/src/db/update/Container.cxx @@ -0,0 +1,132 @@ +/* + * Copyright (C) 2003-2014 The Music Player Daemon Project + * http://www.musicpd.org + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#include "config.h" /* must be first for large file support */ +#include "Walk.hxx" +#include "UpdateDomain.hxx" +#include "db/DatabaseLock.hxx" +#include "db/plugins/simple/Directory.hxx" +#include "db/plugins/simple/Song.hxx" +#include "storage/StorageInterface.hxx" +#include "decoder/DecoderPlugin.hxx" +#include "decoder/DecoderList.hxx" +#include "fs/AllocatedPath.hxx" +#include "storage/FileInfo.hxx" +#include "tag/TagHandler.hxx" +#include "tag/TagBuilder.hxx" +#include "Log.hxx" + +#include <sys/stat.h> + +Directory * +UpdateWalk::MakeDirectoryIfModified(Directory &parent, const char *name, + const FileInfo &info) +{ + Directory *directory = parent.FindChild(name); + + // directory exists already + if (directory != nullptr) { + if (directory->IsMount()) + return nullptr; + + if (directory->mtime == info.mtime && !walk_discard) { + /* not modified */ + return nullptr; + } + + editor.DeleteDirectory(directory); + modified = true; + } + + directory = parent.MakeChild(name); + directory->mtime = info.mtime; + return directory; +} + +static bool +SupportsContainerSuffix(const DecoderPlugin &plugin, const char *suffix) +{ + return plugin.container_scan != nullptr && + plugin.SupportsSuffix(suffix); +} + +bool +UpdateWalk::UpdateContainerFile(Directory &directory, + const char *name, const char *suffix, + const FileInfo &info) +{ + const DecoderPlugin *_plugin = decoder_plugins_find([suffix](const DecoderPlugin &plugin){ + return SupportsContainerSuffix(plugin, suffix); + }); + if (_plugin == nullptr) + return false; + const DecoderPlugin &plugin = *_plugin; + + db_lock(); + Directory *contdir = MakeDirectoryIfModified(directory, name, info); + if (contdir == nullptr) { + /* not modified */ + db_unlock(); + return true; + } + + contdir->device = DEVICE_CONTAINER; + db_unlock(); + + const auto pathname = storage.MapFS(contdir->GetPath()); + if (pathname.IsNull()) { + /* not a local file: skip, because the container API + supports only local files */ + editor.LockDeleteDirectory(contdir); + return false; + } + + char *vtrack; + unsigned int tnum = 0; + TagBuilder tag_builder; + while ((vtrack = plugin.container_scan(pathname, ++tnum)) != nullptr) { + Song *song = Song::NewFile(vtrack, *contdir); + + // shouldn't be necessary but it's there.. + song->mtime = info.mtime; + + const auto child_path_fs = AllocatedPath::Build(pathname, + vtrack); + plugin.ScanFile(child_path_fs, + add_tag_handler, &tag_builder); + + tag_builder.Commit(song->tag); + + db_lock(); + contdir->AddSong(song); + db_unlock(); + + modified = true; + + FormatDefault(update_domain, "added %s/%s", + directory.GetPath(), vtrack); + delete[] vtrack; + } + + if (tnum == 1) { + editor.LockDeleteDirectory(contdir); + return false; + } else + return true; +} diff --git a/src/db/update/Editor.cxx b/src/db/update/Editor.cxx new file mode 100644 index 000000000..4136ccdad --- /dev/null +++ b/src/db/update/Editor.cxx @@ -0,0 +1,119 @@ +/* + * Copyright (C) 2003-2014 The Music Player Daemon Project + * http://www.musicpd.org + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#include "config.h" /* must be first for large file support */ +#include "Editor.hxx" +#include "Remove.hxx" +#include "db/PlaylistVector.hxx" +#include "db/DatabaseLock.hxx" +#include "db/plugins/simple/Directory.hxx" +#include "db/plugins/simple/Song.hxx" + +#include <assert.h> +#include <stddef.h> + +void +DatabaseEditor::DeleteSong(Directory &dir, Song *del) +{ + assert(del->parent == &dir); + + /* first, prevent traversers in main task from getting this */ + dir.RemoveSong(del); + + db_unlock(); /* temporary unlock, because update_remove_song() blocks */ + + /* now take it out of the playlist (in the main_task) */ + remove.Remove(del); + + /* finally, all possible references gone, free it */ + del->Free(); + + db_lock(); +} + +void +DatabaseEditor::LockDeleteSong(Directory &parent, Song *song) +{ + db_lock(); + DeleteSong(parent, song); + db_unlock(); +} + +/** + * Recursively remove all sub directories and songs from a directory, + * leaving an empty directory. + * + * Caller must lock the #db_mutex. + */ +inline void +DatabaseEditor::ClearDirectory(Directory &directory) +{ + directory.ForEachChildSafe([this](Directory &child){ + DeleteDirectory(&child); + }); + + directory.ForEachSongSafe([this, &directory](Song &song){ + assert(song.parent == &directory); + DeleteSong(directory, &song); + }); +} + +void +DatabaseEditor::DeleteDirectory(Directory *directory) +{ + assert(directory->parent != nullptr); + + ClearDirectory(*directory); + + directory->Delete(); +} + +void +DatabaseEditor::LockDeleteDirectory(Directory *directory) +{ + db_lock(); + DeleteDirectory(directory); + db_unlock(); +} + +bool +DatabaseEditor::DeleteNameIn(Directory &parent, const char *name) +{ + bool modified = false; + + db_lock(); + Directory *directory = parent.FindChild(name); + + if (directory != nullptr) { + DeleteDirectory(directory); + modified = true; + } + + Song *song = parent.FindSong(name); + if (song != nullptr) { + DeleteSong(parent, song); + modified = true; + } + + parent.playlists.erase(name); + + db_unlock(); + + return modified; +} diff --git a/src/db/update/Editor.hxx b/src/db/update/Editor.hxx new file mode 100644 index 000000000..fc08c2659 --- /dev/null +++ b/src/db/update/Editor.hxx @@ -0,0 +1,70 @@ +/* + * Copyright (C) 2003-2014 The Music Player Daemon Project + * http://www.musicpd.org + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#ifndef MPD_UPDATE_DATABASE_HXX +#define MPD_UPDATE_DATABASE_HXX + +#include "check.h" +#include "Remove.hxx" + +struct Directory; +struct Song; +class UpdateRemoveService; + +class DatabaseEditor final { + UpdateRemoveService remove; + +public: + DatabaseEditor(EventLoop &_loop, DatabaseListener &_listener) + :remove(_loop, _listener) {} + + /** + * Caller must lock the #db_mutex. + */ + void DeleteSong(Directory &parent, Song *song); + + /** + * DeleteSong() with automatic locking. + */ + void LockDeleteSong(Directory &parent, Song *song); + + /** + * Recursively free a directory and all its contents. + * + * Caller must lock the #db_mutex. + */ + void DeleteDirectory(Directory *directory); + + /** + * DeleteDirectory() with automatic locking. + */ + void LockDeleteDirectory(Directory *directory); + + /** + * Caller must NOT lock the #db_mutex. + * + * @return true if the database was modified + */ + bool DeleteNameIn(Directory &parent, const char *name); + +private: + void ClearDirectory(Directory &directory); +}; + +#endif diff --git a/src/db/update/ExcludeList.cxx b/src/db/update/ExcludeList.cxx new file mode 100644 index 000000000..cf92ac8f7 --- /dev/null +++ b/src/db/update/ExcludeList.cxx @@ -0,0 +1,93 @@ +/* + * Copyright (C) 2003-2014 The Music Player Daemon Project + * http://www.musicpd.org + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +/* + * The .mpdignore backend code. + * + */ + +#include "config.h" +#include "ExcludeList.hxx" +#include "fs/Path.hxx" +#include "fs/FileSystem.hxx" +#include "util/StringUtil.hxx" +#include "util/Domain.hxx" +#include "Log.hxx" + +#include <assert.h> +#include <string.h> +#include <errno.h> + +static constexpr Domain exclude_list_domain("exclude_list"); + +bool +ExcludeList::LoadFile(Path path_fs) +{ +#ifdef HAVE_GLIB + FILE *file = FOpen(path_fs, FOpenMode::ReadText); + if (file == nullptr) { + const int e = errno; + if (e != ENOENT) { + const auto path_utf8 = path_fs.ToUTF8(); + FormatErrno(exclude_list_domain, + "Failed to open %s", + path_utf8.c_str()); + } + + return false; + } + + char line[1024]; + while (fgets(line, sizeof(line), file) != nullptr) { + char *p = strchr(line, '#'); + if (p != nullptr) + *p = 0; + + p = Strip(line); + if (*p != 0) + patterns.emplace_front(p); + } + + fclose(file); +#else + // TODO: implement + (void)path_fs; +#endif + + return true; +} + +bool +ExcludeList::Check(Path name_fs) const +{ + assert(!name_fs.IsNull()); + + /* XXX include full path name in check */ + +#ifdef HAVE_GLIB + for (const auto &i : patterns) + if (i.Check(name_fs.c_str())) + return true; +#else + // TODO: implement + (void)name_fs; +#endif + + return false; +} diff --git a/src/db/update/ExcludeList.hxx b/src/db/update/ExcludeList.hxx new file mode 100644 index 000000000..ef6c4d53e --- /dev/null +++ b/src/db/update/ExcludeList.hxx @@ -0,0 +1,92 @@ +/* + * Copyright (C) 2003-2014 The Music Player Daemon Project + * http://www.musicpd.org + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +/* + * The .mpdignore backend code. + * + */ + +#ifndef MPD_EXCLUDE_H +#define MPD_EXCLUDE_H + +#include "check.h" +#include "Compiler.h" + +#include <forward_list> + +#ifdef HAVE_GLIB +#include <glib.h> +#endif + +class Path; + +class ExcludeList { +#ifdef HAVE_GLIB + class Pattern { + GPatternSpec *pattern; + + public: + Pattern(const char *_pattern) + :pattern(g_pattern_spec_new(_pattern)) {} + + Pattern(Pattern &&other) + :pattern(other.pattern) { + other.pattern = nullptr; + } + + ~Pattern() { + g_pattern_spec_free(pattern); + } + + gcc_pure + bool Check(const char *name_fs) const { + return g_pattern_match_string(pattern, name_fs); + } + }; + + std::forward_list<Pattern> patterns; +#else + // TODO: implement +#endif + +public: + gcc_pure + bool IsEmpty() const { +#ifdef HAVE_GLIB + return patterns.empty(); +#else + // TODO: implement + return true; +#endif + } + + /** + * Loads and parses a .mpdignore file. + */ + bool LoadFile(Path path_fs); + + /** + * Checks whether one of the patterns in the .mpdignore file matches + * the specified file name. + */ + bool Check(Path name_fs) const; +}; + + +#endif diff --git a/src/db/update/InotifyDomain.cxx b/src/db/update/InotifyDomain.cxx new file mode 100644 index 000000000..4a3ab2d79 --- /dev/null +++ b/src/db/update/InotifyDomain.cxx @@ -0,0 +1,23 @@ +/* + * Copyright (C) 2003-2014 The Music Player Daemon Project + * http://www.musicpd.org + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#include "InotifyDomain.hxx" +#include "util/Domain.hxx" + +const Domain inotify_domain("inotify"); diff --git a/src/db/update/InotifyDomain.hxx b/src/db/update/InotifyDomain.hxx new file mode 100644 index 000000000..ad6202361 --- /dev/null +++ b/src/db/update/InotifyDomain.hxx @@ -0,0 +1,25 @@ +/* + * Copyright (C) 2003-2014 The Music Player Daemon Project + * http://www.musicpd.org + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#ifndef MPD_INOTIFY_DOMAIN_HXX +#define MPD_INOTIFY_DOMAIN_HXX + +extern const class Domain inotify_domain; + +#endif diff --git a/src/db/update/InotifyQueue.cxx b/src/db/update/InotifyQueue.cxx new file mode 100644 index 000000000..013200f98 --- /dev/null +++ b/src/db/update/InotifyQueue.cxx @@ -0,0 +1,89 @@ +/* + * Copyright (C) 2003-2014 The Music Player Daemon Project + * http://www.musicpd.org + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#include "config.h" +#include "InotifyQueue.hxx" +#include "InotifyDomain.hxx" +#include "Service.hxx" +#include "Log.hxx" + +#include <string.h> + +/** + * Wait this long after the last change before calling + * update_enqueue(). This increases the probability that updates can + * be bundled. + */ +static constexpr unsigned INOTIFY_UPDATE_DELAY_S = 5; + +void +InotifyQueue::OnTimeout() +{ + unsigned id; + + while (!queue.empty()) { + const char *uri_utf8 = queue.front().c_str(); + + id = update.Enqueue(uri_utf8, false); + if (id == 0) { + /* retry later */ + ScheduleSeconds(INOTIFY_UPDATE_DELAY_S); + return; + } + + FormatDebug(inotify_domain, "updating '%s' job=%u", + uri_utf8, id); + + queue.pop_front(); + } +} + +static bool +path_in(const char *path, const char *possible_parent) +{ + size_t length = strlen(possible_parent); + + return path[0] == 0 || + (memcmp(possible_parent, path, length) == 0 && + (path[length] == 0 || path[length] == '/')); +} + +void +InotifyQueue::Enqueue(const char *uri_utf8) +{ + ScheduleSeconds(INOTIFY_UPDATE_DELAY_S); + + for (auto i = queue.begin(), end = queue.end(); i != end;) { + const char *current_uri = i->c_str(); + + if (path_in(uri_utf8, current_uri)) + /* already enqueued */ + return; + + if (path_in(current_uri, uri_utf8)) + /* existing path is a sub-path of the new + path; we can dequeue the existing path and + update the new path instead */ + i = queue.erase(i); + else + ++i; + } + + queue.emplace_back(uri_utf8); +} diff --git a/src/db/update/InotifyQueue.hxx b/src/db/update/InotifyQueue.hxx new file mode 100644 index 000000000..a9abc2969 --- /dev/null +++ b/src/db/update/InotifyQueue.hxx @@ -0,0 +1,46 @@ +/* + * Copyright (C) 2003-2014 The Music Player Daemon Project + * http://www.musicpd.org + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#ifndef MPD_INOTIFY_QUEUE_HXX +#define MPD_INOTIFY_QUEUE_HXX + +#include "event/TimeoutMonitor.hxx" +#include "Compiler.h" + +#include <list> +#include <string> + +class UpdateService; + +class InotifyQueue final : private TimeoutMonitor { + UpdateService &update; + + std::list<std::string> queue; + +public: + InotifyQueue(EventLoop &_loop, UpdateService &_update) + :TimeoutMonitor(_loop), update(_update) {} + + void Enqueue(const char *uri_utf8); + +private: + virtual void OnTimeout() override; +}; + +#endif diff --git a/src/db/update/InotifySource.cxx b/src/db/update/InotifySource.cxx new file mode 100644 index 000000000..233504ad6 --- /dev/null +++ b/src/db/update/InotifySource.cxx @@ -0,0 +1,116 @@ +/* + * Copyright (C) 2003-2014 The Music Player Daemon Project + * http://www.musicpd.org + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#include "config.h" +#include "InotifySource.hxx" +#include "InotifyDomain.hxx" +#include "util/Error.hxx" +#include "system/fd_util.h" +#include "system/FatalError.hxx" +#include "Log.hxx" + +#include <algorithm> + +#include <sys/inotify.h> +#include <unistd.h> +#include <errno.h> +#include <stdint.h> +#include <limits.h> + +bool +InotifySource::OnSocketReady(gcc_unused unsigned flags) +{ + uint8_t buffer[4096]; + static_assert(sizeof(buffer) >= sizeof(struct inotify_event) + NAME_MAX + 1, + "inotify buffer too small"); + + ssize_t nbytes = read(Get(), buffer, sizeof(buffer)); + if (nbytes < 0) + FatalSystemError("Failed to read from inotify"); + if (nbytes == 0) + FatalError("end of file from inotify"); + + const uint8_t *p = buffer, *const end = p + nbytes; + + while (true) { + const size_t remaining = end - p; + const struct inotify_event *event = + (const struct inotify_event *)p; + if (remaining < sizeof(*event) || + remaining < sizeof(*event) + event->len) + break; + + const char *name; + if (event->len > 0 && event->name[event->len - 1] == 0) + name = event->name; + else + name = nullptr; + + callback(event->wd, event->mask, name, callback_ctx); + p += sizeof(*event) + event->len; + } + + return true; +} + +inline +InotifySource::InotifySource(EventLoop &_loop, + mpd_inotify_callback_t _callback, void *_ctx, + int _fd) + :SocketMonitor(_fd, _loop), + callback(_callback), callback_ctx(_ctx) +{ + ScheduleRead(); + +} + +InotifySource * +InotifySource::Create(EventLoop &loop, + mpd_inotify_callback_t callback, void *callback_ctx, + Error &error) +{ + int fd = inotify_init_cloexec(); + if (fd < 0) { + error.SetErrno("inotify_init() has failed"); + return nullptr; + } + + return new InotifySource(loop, callback, callback_ctx, fd); +} + +int +InotifySource::Add(const char *path_fs, unsigned mask, Error &error) +{ + int wd = inotify_add_watch(Get(), path_fs, mask); + if (wd < 0) + error.SetErrno("inotify_add_watch() has failed"); + + return wd; +} + +void +InotifySource::Remove(unsigned wd) +{ + int ret = inotify_rm_watch(Get(), wd); + if (ret < 0 && errno != EINVAL) + LogErrno(inotify_domain, "inotify_rm_watch() has failed"); + + /* EINVAL may happen here when the file has been deleted; the + kernel seems to auto-unregister deleted files */ +} diff --git a/src/db/update/InotifySource.hxx b/src/db/update/InotifySource.hxx new file mode 100644 index 000000000..081ce10f3 --- /dev/null +++ b/src/db/update/InotifySource.hxx @@ -0,0 +1,71 @@ +/* + * Copyright (C) 2003-2014 The Music Player Daemon Project + * http://www.musicpd.org + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#ifndef MPD_INOTIFY_SOURCE_HXX +#define MPD_INOTIFY_SOURCE_HXX + +#include "event/SocketMonitor.hxx" + +class Error; + +typedef void (*mpd_inotify_callback_t)(int wd, unsigned mask, + const char *name, void *ctx); + +class InotifySource final : private SocketMonitor { + mpd_inotify_callback_t callback; + void *callback_ctx; + + InotifySource(EventLoop &_loop, + mpd_inotify_callback_t callback, void *ctx, int fd); + +public: + ~InotifySource() { + Close(); + } + + /** + * Creates a new inotify source and registers it in the GLib main + * loop. + * + * @param a callback invoked for events received from the kernel + */ + static InotifySource *Create(EventLoop &_loop, + mpd_inotify_callback_t callback, + void *ctx, + Error &error); + + /** + * Adds a path to the notify list. + * + * @return a watch descriptor or -1 on error + */ + int Add(const char *path_fs, unsigned mask, Error &error); + + /** + * Removes a path from the notify list. + * + * @param wd the watch descriptor returned by mpd_inotify_source_add() + */ + void Remove(unsigned wd); + +private: + virtual bool OnSocketReady(unsigned flags) override; +}; + +#endif diff --git a/src/db/update/InotifyUpdate.cxx b/src/db/update/InotifyUpdate.cxx new file mode 100644 index 000000000..26bdddf8d --- /dev/null +++ b/src/db/update/InotifyUpdate.cxx @@ -0,0 +1,344 @@ +/* + * Copyright (C) 2003-2014 The Music Player Daemon Project + * http://www.musicpd.org + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#include "config.h" /* must be first for large file support */ +#include "InotifyUpdate.hxx" +#include "InotifySource.hxx" +#include "InotifyQueue.hxx" +#include "InotifyDomain.hxx" +#include "storage/StorageInterface.hxx" +#include "fs/AllocatedPath.hxx" +#include "fs/FileSystem.hxx" +#include "util/Error.hxx" +#include "Log.hxx" + +#include <string> +#include <map> +#include <forward_list> + +#include <assert.h> +#include <sys/inotify.h> +#include <sys/stat.h> +#include <string.h> +#include <dirent.h> + +static constexpr unsigned IN_MASK = +#ifdef IN_ONLYDIR + IN_ONLYDIR| +#endif + IN_ATTRIB|IN_CLOSE_WRITE|IN_CREATE|IN_DELETE|IN_DELETE_SELF + |IN_MOVE|IN_MOVE_SELF; + +struct WatchDirectory { + WatchDirectory *parent; + + AllocatedPath name; + + int descriptor; + + std::forward_list<WatchDirectory> children; + + template<typename N> + WatchDirectory(WatchDirectory *_parent, N &&_name, + int _descriptor) + :parent(_parent), name(std::forward<N>(_name)), + descriptor(_descriptor) {} + + WatchDirectory(const WatchDirectory &) = delete; + WatchDirectory &operator=(const WatchDirectory &) = delete; + + gcc_pure + unsigned GetDepth() const; + + gcc_pure + AllocatedPath GetUriFS() const; +}; + +static InotifySource *inotify_source; +static InotifyQueue *inotify_queue; + +static unsigned inotify_max_depth; +static WatchDirectory *inotify_root; +static std::map<int, WatchDirectory *> inotify_directories; + +static void +tree_add_watch_directory(WatchDirectory *directory) +{ + inotify_directories.insert(std::make_pair(directory->descriptor, + directory)); +} + +static void +tree_remove_watch_directory(WatchDirectory *directory) +{ + auto i = inotify_directories.find(directory->descriptor); + assert(i != inotify_directories.end()); + inotify_directories.erase(i); +} + +static WatchDirectory * +tree_find_watch_directory(int wd) +{ + auto i = inotify_directories.find(wd); + if (i == inotify_directories.end()) + return nullptr; + + return i->second; +} + +static void +disable_watch_directory(WatchDirectory &directory) +{ + tree_remove_watch_directory(&directory); + + for (WatchDirectory &child : directory.children) + disable_watch_directory(child); + + inotify_source->Remove(directory.descriptor); +} + +static void +remove_watch_directory(WatchDirectory *directory) +{ + assert(directory != nullptr); + + if (directory->parent == nullptr) { + LogWarning(inotify_domain, + "music directory was removed - " + "cannot continue to watch it"); + return; + } + + disable_watch_directory(*directory); + + /* remove it from the parent, which effectively deletes it */ + directory->parent->children.remove_if([directory](const WatchDirectory &child){ + return &child == directory; + }); +} + +AllocatedPath +WatchDirectory::GetUriFS() const +{ + if (parent == nullptr) + return AllocatedPath::Null(); + + const auto uri = parent->GetUriFS(); + if (uri.IsNull()) + return name; + + return AllocatedPath::Build(uri, name); +} + +/* we don't look at "." / ".." nor files with newlines in their name */ +static bool skip_path(const char *path) +{ + return (path[0] == '.' && path[1] == 0) || + (path[0] == '.' && path[1] == '.' && path[2] == 0) || + strchr(path, '\n') != nullptr; +} + +static void +recursive_watch_subdirectories(WatchDirectory *directory, + const AllocatedPath &path_fs, unsigned depth) +{ + Error error; + DIR *dir; + struct dirent *ent; + + assert(directory != nullptr); + assert(depth <= inotify_max_depth); + assert(!path_fs.IsNull()); + + ++depth; + + if (depth > inotify_max_depth) + return; + + dir = opendir(path_fs.c_str()); + if (dir == nullptr) { + FormatErrno(inotify_domain, + "Failed to open directory %s", path_fs.c_str()); + return; + } + + while ((ent = readdir(dir))) { + struct stat st; + int ret; + + if (skip_path(ent->d_name)) + continue; + + const auto child_path_fs = + AllocatedPath::Build(path_fs, ent->d_name); + ret = StatFile(child_path_fs, st); + if (ret < 0) { + FormatErrno(inotify_domain, + "Failed to stat %s", + child_path_fs.c_str()); + continue; + } + + if (!S_ISDIR(st.st_mode)) + continue; + + ret = inotify_source->Add(child_path_fs.c_str(), IN_MASK, + error); + if (ret < 0) { + FormatError(error, + "Failed to register %s", + child_path_fs.c_str()); + error.Clear(); + continue; + } + + WatchDirectory *child = tree_find_watch_directory(ret); + if (child != nullptr) + /* already being watched */ + continue; + + directory->children.emplace_front(directory, + AllocatedPath::FromFS(ent->d_name), + ret); + child = &directory->children.front(); + + tree_add_watch_directory(child); + + recursive_watch_subdirectories(child, child_path_fs, depth); + } + + closedir(dir); +} + +gcc_pure +unsigned +WatchDirectory::GetDepth() const +{ + const WatchDirectory *d = this; + unsigned depth = 0; + while ((d = d->parent) != nullptr) + ++depth; + + return depth; +} + +static void +mpd_inotify_callback(int wd, unsigned mask, + gcc_unused const char *name, gcc_unused void *ctx) +{ + WatchDirectory *directory; + + /*FormatDebug(inotify_domain, "wd=%d mask=0x%x name='%s'", wd, mask, name);*/ + + directory = tree_find_watch_directory(wd); + if (directory == nullptr) + return; + + const auto uri_fs = directory->GetUriFS(); + + if ((mask & (IN_DELETE_SELF|IN_MOVE_SELF)) != 0) { + remove_watch_directory(directory); + return; + } + + if ((mask & (IN_ATTRIB|IN_CREATE|IN_MOVE)) != 0 && + (mask & IN_ISDIR) != 0) { + /* a sub directory was changed: register those in + inotify */ + const auto &root = inotify_root->name; + + const auto path_fs = uri_fs.IsNull() + ? root + : AllocatedPath::Build(root, uri_fs.c_str()); + + recursive_watch_subdirectories(directory, path_fs, + directory->GetDepth()); + } + + if ((mask & (IN_CLOSE_WRITE|IN_MOVE|IN_DELETE)) != 0 || + /* at the maximum depth, we watch out for newly created + directories */ + (directory->GetDepth() == inotify_max_depth && + (mask & (IN_CREATE|IN_ISDIR)) == (IN_CREATE|IN_ISDIR))) { + /* a file was changed, or a directory was + moved/deleted: queue a database update */ + + if (!uri_fs.IsNull()) { + const std::string uri_utf8 = uri_fs.ToUTF8(); + if (!uri_utf8.empty()) + inotify_queue->Enqueue(uri_utf8.c_str()); + } + else + inotify_queue->Enqueue(""); + } +} + +void +mpd_inotify_init(EventLoop &loop, Storage &storage, UpdateService &update, + unsigned max_depth) +{ + LogDebug(inotify_domain, "initializing inotify"); + + const auto path = storage.MapFS(""); + if (path.IsNull()) { + LogDebug(inotify_domain, "no music directory configured"); + return; + } + + Error error; + inotify_source = InotifySource::Create(loop, + mpd_inotify_callback, nullptr, + error); + if (inotify_source == nullptr) { + LogError(error); + return; + } + + inotify_max_depth = max_depth; + + int descriptor = inotify_source->Add(path.c_str(), IN_MASK, error); + if (descriptor < 0) { + LogError(error); + delete inotify_source; + inotify_source = nullptr; + return; + } + + inotify_root = new WatchDirectory(nullptr, path, descriptor); + + tree_add_watch_directory(inotify_root); + + recursive_watch_subdirectories(inotify_root, path, 0); + + inotify_queue = new InotifyQueue(loop, update); + + LogDebug(inotify_domain, "watching music directory"); +} + +void +mpd_inotify_finish(void) +{ + if (inotify_source == nullptr) + return; + + delete inotify_queue; + delete inotify_source; + delete inotify_root; + inotify_directories.clear(); +} diff --git a/src/db/update/InotifyUpdate.hxx b/src/db/update/InotifyUpdate.hxx new file mode 100644 index 000000000..0f78db71f --- /dev/null +++ b/src/db/update/InotifyUpdate.hxx @@ -0,0 +1,37 @@ +/* + * Copyright (C) 2003-2014 The Music Player Daemon Project + * http://www.musicpd.org + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#ifndef MPD_INOTIFY_UPDATE_HXX +#define MPD_INOTIFY_UPDATE_HXX + +#include "check.h" +#include "Compiler.h" + +class EventLoop; +class Storage; +class UpdateService; + +void +mpd_inotify_init(EventLoop &loop, Storage &storage, UpdateService &update, + unsigned max_depth); + +void +mpd_inotify_finish(void); + +#endif diff --git a/src/db/update/Queue.cxx b/src/db/update/Queue.cxx new file mode 100644 index 000000000..6d6d80131 --- /dev/null +++ b/src/db/update/Queue.cxx @@ -0,0 +1,67 @@ +/* + * Copyright (C) 2003-2014 The Music Player Daemon Project + * http://www.musicpd.org + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#include "config.h" +#include "Queue.hxx" + +bool +UpdateQueue::Push(SimpleDatabase &db, Storage &storage, + const char *path, bool discard, unsigned id) +{ + if (update_queue.size() >= MAX_UPDATE_QUEUE_SIZE) + return false; + + update_queue.emplace_back(db, storage, path, discard, id); + return true; +} + +UpdateQueueItem +UpdateQueue::Pop() +{ + if (update_queue.empty()) + return UpdateQueueItem(); + + auto i = std::move(update_queue.front()); + update_queue.pop_front(); + return i; +} + +void +UpdateQueue::Erase(SimpleDatabase &db) +{ + for (auto i = update_queue.begin(), end = update_queue.end(); + i != end;) { + if (i->db == &db) + i = update_queue.erase(i); + else + ++i; + } +} + +void +UpdateQueue::Erase(Storage &storage) +{ + for (auto i = update_queue.begin(), end = update_queue.end(); + i != end;) { + if (i->storage == &storage) + i = update_queue.erase(i); + else + ++i; + } +} diff --git a/src/db/update/Queue.hxx b/src/db/update/Queue.hxx new file mode 100644 index 000000000..9064ea481 --- /dev/null +++ b/src/db/update/Queue.hxx @@ -0,0 +1,77 @@ +/* + * Copyright (C) 2003-2014 The Music Player Daemon Project + * http://www.musicpd.org + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#ifndef MPD_UPDATE_QUEUE_HXX +#define MPD_UPDATE_QUEUE_HXX + +#include "check.h" +#include "Compiler.h" + +#include <string> +#include <list> + +class SimpleDatabase; +class Storage; + +struct UpdateQueueItem { + SimpleDatabase *db; + Storage *storage; + + std::string path_utf8; + unsigned id; + bool discard; + + UpdateQueueItem():id(0) {} + + UpdateQueueItem(SimpleDatabase &_db, + Storage &_storage, + const char *_path, bool _discard, + unsigned _id) + :db(&_db), storage(&_storage), path_utf8(_path), + id(_id), discard(_discard) {} + + bool IsDefined() const { + return id != 0; + } +}; + +class UpdateQueue { + static constexpr unsigned MAX_UPDATE_QUEUE_SIZE = 32; + + std::list<UpdateQueueItem> update_queue; + +public: + gcc_nonnull_all + bool Push(SimpleDatabase &db, Storage &storage, + const char *path, bool discard, unsigned id); + + UpdateQueueItem Pop(); + + void Clear() { + update_queue.clear(); + } + + gcc_nonnull_all + void Erase(SimpleDatabase &db); + + gcc_nonnull_all + void Erase(Storage &storage); +}; + +#endif diff --git a/src/db/update/Remove.cxx b/src/db/update/Remove.cxx new file mode 100644 index 000000000..dfada05b2 --- /dev/null +++ b/src/db/update/Remove.cxx @@ -0,0 +1,68 @@ +/* + * Copyright (C) 2003-2014 The Music Player Daemon Project + * http://www.musicpd.org + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#include "config.h" /* must be first for large file support */ +#include "Remove.hxx" +#include "UpdateDomain.hxx" +#include "db/plugins/simple/Song.hxx" +#include "db/LightSong.hxx" +#include "db/DatabaseListener.hxx" +#include "Log.hxx" + +#include <assert.h> + +/** + * Safely remove a song from the database. This must be done in the + * main task, to be sure that there is no pointer left to it. + */ +void +UpdateRemoveService::RunDeferred() +{ + assert(removed_song != nullptr); + + { + const auto uri = removed_song->GetURI(); + FormatDefault(update_domain, "removing %s", uri.c_str()); + } + + listener.OnDatabaseSongRemoved(removed_song->Export()); + + /* clear "removed_song" and send signal to update thread */ + remove_mutex.lock(); + removed_song = nullptr; + remove_cond.signal(); + remove_mutex.unlock(); +} + +void +UpdateRemoveService::Remove(const Song *song) +{ + assert(removed_song == nullptr); + + removed_song = song; + + DeferredMonitor::Schedule(); + + remove_mutex.lock(); + + while (removed_song != nullptr) + remove_cond.wait(remove_mutex); + + remove_mutex.unlock(); +} diff --git a/src/db/update/Remove.hxx b/src/db/update/Remove.hxx new file mode 100644 index 000000000..f0457efa1 --- /dev/null +++ b/src/db/update/Remove.hxx @@ -0,0 +1,61 @@ +/* + * Copyright (C) 2003-2014 The Music Player Daemon Project + * http://www.musicpd.org + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#ifndef MPD_UPDATE_REMOVE_HXX +#define MPD_UPDATE_REMOVE_HXX + +#include "check.h" +#include "event/DeferredMonitor.hxx" +#include "thread/Mutex.hxx" +#include "thread/Cond.hxx" + +struct Song; +class DatabaseListener; + +/** + * This class handles #Song removal. It defers the action to the main + * thread to ensure that all references to the #Song are gone. + */ +class UpdateRemoveService final : DeferredMonitor { + DatabaseListener &listener; + + Mutex remove_mutex; + Cond remove_cond; + + const Song *removed_song; + +public: + UpdateRemoveService(EventLoop &_loop, DatabaseListener &_listener) + :DeferredMonitor(_loop), listener(_listener), + removed_song(nullptr){} + + /** + * Sends a signal to the main thread which will in turn remove + * the song: from the sticker database and from the playlist. + * This serialized access is implemented to avoid excessive + * locking. + */ + void Remove(const Song *song); + +private: + /* virtual methods from class DeferredMonitor */ + virtual void RunDeferred() override; +}; + +#endif diff --git a/src/db/update/Service.cxx b/src/db/update/Service.cxx new file mode 100644 index 000000000..e8a1f6b02 --- /dev/null +++ b/src/db/update/Service.cxx @@ -0,0 +1,279 @@ +/* + * Copyright (C) 2003-2014 The Music Player Daemon Project + * http://www.musicpd.org + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#include "config.h" +#include "Service.hxx" +#include "Walk.hxx" +#include "UpdateDomain.hxx" +#include "db/DatabaseListener.hxx" +#include "db/DatabaseLock.hxx" +#include "db/plugins/simple/SimpleDatabasePlugin.hxx" +#include "db/plugins/simple/Directory.hxx" +#include "storage/CompositeStorage.hxx" +#include "Idle.hxx" +#include "util/Error.hxx" +#include "Log.hxx" +#include "Instance.hxx" +#include "system/FatalError.hxx" +#include "thread/Id.hxx" +#include "thread/Thread.hxx" +#include "thread/Util.hxx" + +#ifndef NDEBUG +#include "event/Loop.hxx" +#endif + +#include <assert.h> + +UpdateService::UpdateService(EventLoop &_loop, SimpleDatabase &_db, + CompositeStorage &_storage, + DatabaseListener &_listener) + :DeferredMonitor(_loop), + db(_db), storage(_storage), + listener(_listener), + progress(UPDATE_PROGRESS_IDLE), + update_task_id(0), + walk(nullptr) +{ +} + +UpdateService::~UpdateService() +{ + CancelAllAsync(); + + if (update_thread.IsDefined()) + update_thread.Join(); + + delete walk; +} + +void +UpdateService::CancelAllAsync() +{ + assert(GetEventLoop().IsInsideOrNull()); + + queue.Clear(); + + if (walk != nullptr) + walk->Cancel(); +} + +void +UpdateService::CancelMount(const char *uri) +{ + /* determine which (mounted) database will be updated and what + storage will be scanned */ + + db_lock(); + const auto lr = db.GetRoot().LookupDirectory(uri); + db_unlock(); + + if (!lr.directory->IsMount()) + return; + + bool cancel_current = false; + + Storage *storage2 = storage.GetMount(uri); + if (storage2 != nullptr) { + queue.Erase(*storage2); + cancel_current = next.IsDefined() && next.storage == storage2; + } + + Database &_db2 = *lr.directory->mounted_database; + if (_db2.IsPlugin(simple_db_plugin)) { + SimpleDatabase &db2 = static_cast<SimpleDatabase &>(_db2); + queue.Erase(db2); + cancel_current |= next.IsDefined() && next.db == &db2; + } + + if (cancel_current && walk != nullptr) { + walk->Cancel(); + + if (update_thread.IsDefined()) + update_thread.Join(); + } +} + +inline void +UpdateService::Task() +{ + assert(walk != nullptr); + + if (!next.path_utf8.empty()) + FormatDebug(update_domain, "starting: %s", + next.path_utf8.c_str()); + else + LogDebug(update_domain, "starting"); + + SetThreadIdlePriority(); + + modified = walk->Walk(next.db->GetRoot(), next.path_utf8.c_str(), + next.discard); + + if (modified || !next.db->FileExists()) { + Error error; + if (!next.db->Save(error)) + LogError(error, "Failed to save database"); + } + + if (!next.path_utf8.empty()) + FormatDebug(update_domain, "finished: %s", + next.path_utf8.c_str()); + else + LogDebug(update_domain, "finished"); + + progress = UPDATE_PROGRESS_DONE; + DeferredMonitor::Schedule(); +} + +void +UpdateService::Task(void *ctx) +{ + UpdateService &service = *(UpdateService *)ctx; + return service.Task(); +} + +void +UpdateService::StartThread(UpdateQueueItem &&i) +{ + assert(GetEventLoop().IsInsideOrNull()); + assert(walk == nullptr); + + progress = UPDATE_PROGRESS_RUNNING; + modified = false; + + next = std::move(i); + walk = new UpdateWalk(GetEventLoop(), listener, *next.storage); + + Error error; + if (!update_thread.Start(Task, this, error)) + FatalError(error); + + FormatDebug(update_domain, + "spawned thread for update job id %i", next.id); +} + +unsigned +UpdateService::GenerateId() +{ + unsigned id = update_task_id + 1; + if (id > update_task_id_max) + id = 1; + return id; +} + +unsigned +UpdateService::Enqueue(const char *path, bool discard) +{ + assert(GetEventLoop().IsInsideOrNull()); + + /* determine which (mounted) database will be updated and what + storage will be scanned */ + SimpleDatabase *db2; + Storage *storage2; + + db_lock(); + const auto lr = db.GetRoot().LookupDirectory(path); + db_unlock(); + if (lr.directory->IsMount()) { + /* follow the mountpoint, update the mounted + database */ + + Database &_db2 = *lr.directory->mounted_database; + if (!_db2.IsPlugin(simple_db_plugin)) + /* cannot update this type of database */ + return 0; + + db2 = static_cast<SimpleDatabase *>(&_db2); + + if (lr.uri == nullptr) { + storage2 = storage.GetMount(path); + path = ""; + } else { + assert(lr.uri > path); + assert(lr.uri < path + strlen(path)); + assert(lr.uri[-1] == '/'); + + const std::string mountpoint(path, lr.uri - 1); + storage2 = storage.GetMount(mountpoint.c_str()); + path = lr.uri; + } + } else { + /* use the "root" database/storage */ + + db2 = &db; + storage2 = storage.GetMount(""); + } + + if (storage2 == nullptr) + /* no storage found at this mount point - should not + happen */ + return 0; + + if (progress != UPDATE_PROGRESS_IDLE) { + const unsigned id = GenerateId(); + if (!queue.Push(*db2, *storage2, path, discard, id)) + return 0; + + update_task_id = id; + return id; + } + + const unsigned id = update_task_id = GenerateId(); + StartThread(UpdateQueueItem(*db2, *storage2, path, discard, id)); + + idle_add(IDLE_UPDATE); + + return id; +} + +/** + * Called in the main thread after the database update is finished. + */ +void +UpdateService::RunDeferred() +{ + assert(progress == UPDATE_PROGRESS_DONE); + assert(next.IsDefined()); + assert(walk != nullptr); + + /* wait for thread to finish only if it wasn't cancelled by + CancelMount() */ + if (update_thread.IsDefined()) + update_thread.Join(); + + delete walk; + walk = nullptr; + + next = UpdateQueueItem(); + + idle_add(IDLE_UPDATE); + + if (modified) + /* send "idle" events */ + listener.OnDatabaseModified(); + + auto i = queue.Pop(); + if (i.IsDefined()) { + /* schedule the next path */ + StartThread(std::move(i)); + } else { + progress = UPDATE_PROGRESS_IDLE; + } +} diff --git a/src/db/update/Service.hxx b/src/db/update/Service.hxx new file mode 100644 index 000000000..cbb4a3f9d --- /dev/null +++ b/src/db/update/Service.hxx @@ -0,0 +1,115 @@ +/* + * Copyright (C) 2003-2014 The Music Player Daemon Project + * http://www.musicpd.org + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#ifndef MPD_UPDATE_SERVICE_HXX +#define MPD_UPDATE_SERVICE_HXX + +#include "check.h" +#include "Queue.hxx" +#include "event/DeferredMonitor.hxx" +#include "thread/Thread.hxx" + +class SimpleDatabase; +class DatabaseListener; +class UpdateWalk; +class CompositeStorage; + +/** + * This class manages the update queue and runs the update thread. + */ +class UpdateService final : DeferredMonitor { + enum Progress { + UPDATE_PROGRESS_IDLE = 0, + UPDATE_PROGRESS_RUNNING = 1, + UPDATE_PROGRESS_DONE = 2 + }; + + SimpleDatabase &db; + CompositeStorage &storage; + + DatabaseListener &listener; + + Progress progress; + + bool modified; + + Thread update_thread; + + static const unsigned update_task_id_max = 1 << 15; + + unsigned update_task_id; + + UpdateQueue queue; + + UpdateQueueItem next; + + UpdateWalk *walk; + +public: + UpdateService(EventLoop &_loop, SimpleDatabase &_db, + CompositeStorage &_storage, + DatabaseListener &_listener); + + ~UpdateService(); + + /** + * Returns a non-zero job id when we are currently updating + * the database. + */ + unsigned GetId() const { + return next.id; + } + + /** + * Add this path to the database update queue. + * + * @param path a path to update; if an empty string, + * the whole music directory is updated + * @return the job id, or 0 on error + */ + gcc_nonnull_all + unsigned Enqueue(const char *path, bool discard); + + /** + * Clear the queue and cancel the current update. Does not + * wait for the thread to exit. + */ + void CancelAllAsync(); + + /** + * Cancel all updates for the given mount point. If an update + * is already running for it, the method will wait for + * cancellation to complete. + */ + void CancelMount(const char *uri); + +private: + /* virtual methods from class DeferredMonitor */ + virtual void RunDeferred() override; + + /* the update thread */ + void Task(); + static void Task(void *ctx); + + void StartThread(UpdateQueueItem &&i); + + unsigned GenerateId(); +}; + +#endif diff --git a/src/db/update/UpdateDomain.cxx b/src/db/update/UpdateDomain.cxx new file mode 100644 index 000000000..80ad4fd22 --- /dev/null +++ b/src/db/update/UpdateDomain.cxx @@ -0,0 +1,23 @@ +/* + * Copyright (C) 2003-2014 The Music Player Daemon Project + * http://www.musicpd.org + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#include "UpdateDomain.hxx" +#include "util/Domain.hxx" + +const Domain update_domain("update"); diff --git a/src/db/update/UpdateDomain.hxx b/src/db/update/UpdateDomain.hxx new file mode 100644 index 000000000..a6e994390 --- /dev/null +++ b/src/db/update/UpdateDomain.hxx @@ -0,0 +1,25 @@ +/* + * Copyright (C) 2003-2014 The Music Player Daemon Project + * http://www.musicpd.org + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#ifndef MPD_UPDATE_DOMAIN_HXX +#define MPD_UPDATE_DOMAIN_HXX + +extern const class Domain update_domain; + +#endif diff --git a/src/db/update/UpdateIO.cxx b/src/db/update/UpdateIO.cxx new file mode 100644 index 000000000..fa19a8b5a --- /dev/null +++ b/src/db/update/UpdateIO.cxx @@ -0,0 +1,106 @@ +/* + * Copyright (C) 2003-2014 The Music Player Daemon Project + * http://www.musicpd.org + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#include "config.h" /* must be first for large file support */ +#include "UpdateIO.hxx" +#include "UpdateDomain.hxx" +#include "db/plugins/simple/Directory.hxx" +#include "storage/FileInfo.hxx" +#include "storage/StorageInterface.hxx" +#include "fs/Traits.hxx" +#include "fs/FileSystem.hxx" +#include "util/Error.hxx" +#include "Log.hxx" + +#include <errno.h> +#include <unistd.h> + +bool +GetInfo(Storage &storage, const char *uri_utf8, FileInfo &info) +{ + Error error; + bool success = storage.GetInfo(uri_utf8, true, info, error); + if (!success) + LogError(error); + return success; +} + +bool +GetInfo(StorageDirectoryReader &reader, FileInfo &info) +{ + Error error; + bool success = reader.GetInfo(true, info, error); + if (!success) + LogError(error); + return success; +} + +bool +DirectoryExists(Storage &storage, const Directory &directory) +{ + FileInfo info; + if (!storage.GetInfo(directory.GetPath(), true, info, IgnoreError())) + return false; + + return directory.device == DEVICE_INARCHIVE || + directory.device == DEVICE_CONTAINER + ? info.IsRegular() + : info.IsDirectory(); +} + +static bool +GetDirectoryChildInfo(Storage &storage, const Directory &directory, + const char *name_utf8, FileInfo &info, Error &error) +{ + const auto uri_utf8 = PathTraitsUTF8::Build(directory.GetPath(), + name_utf8); + return storage.GetInfo(uri_utf8.c_str(), true, info, error); +} + +bool +directory_child_is_regular(Storage &storage, const Directory &directory, + const char *name_utf8) +{ + FileInfo info; + return GetDirectoryChildInfo(storage, directory, name_utf8, info, + IgnoreError()) && + info.IsRegular(); +} + +bool +directory_child_access(Storage &storage, const Directory &directory, + const char *name, int mode) +{ +#ifdef WIN32 + /* CheckAccess() is useless on WIN32 */ + (void)storage; + (void)directory; + (void)name; + (void)mode; + return true; +#else + const auto path = storage.MapChildFS(directory.GetPath(), name); + if (path.IsNull()) + /* does not point to local file: silently ignore the + check */ + return true; + + return CheckAccess(path, mode) || errno != EACCES; +#endif +} diff --git a/src/db/update/UpdateIO.hxx b/src/db/update/UpdateIO.hxx new file mode 100644 index 000000000..2dbb4ae83 --- /dev/null +++ b/src/db/update/UpdateIO.hxx @@ -0,0 +1,62 @@ +/* + * Copyright (C) 2003-2014 The Music Player Daemon Project + * http://www.musicpd.org + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#ifndef MPD_UPDATE_IO_HXX +#define MPD_UPDATE_IO_HXX + +#include "check.h" +#include "Compiler.h" + +struct Directory; +struct FileInfo; +class Storage; +class StorageDirectoryReader; + +/** + * Wrapper for Storage::GetInfo() that logs errors instead of + * returning them. + */ +bool +GetInfo(Storage &storage, const char *uri_utf8, FileInfo &info); + +/** + * Wrapper for LocalDirectoryReader::GetInfo() that logs errors + * instead of returning them. + */ +bool +GetInfo(StorageDirectoryReader &reader, FileInfo &info); + +gcc_pure +bool +DirectoryExists(Storage &storage, const Directory &directory); + +gcc_pure +bool +directory_child_is_regular(Storage &storage, const Directory &directory, + const char *name_utf8); + +/** + * Checks if the given permissions on the mapped file are given. + */ +gcc_pure +bool +directory_child_access(Storage &storage, const Directory &directory, + const char *name, int mode); + +#endif diff --git a/src/db/update/UpdateSong.cxx b/src/db/update/UpdateSong.cxx new file mode 100644 index 000000000..005bf8992 --- /dev/null +++ b/src/db/update/UpdateSong.cxx @@ -0,0 +1,103 @@ +/* + * Copyright (C) 2003-2014 The Music Player Daemon Project + * http://www.musicpd.org + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#include "config.h" /* must be first for large file support */ +#include "Walk.hxx" +#include "UpdateIO.hxx" +#include "UpdateDomain.hxx" +#include "db/DatabaseLock.hxx" +#include "db/plugins/simple/Directory.hxx" +#include "db/plugins/simple/Song.hxx" +#include "decoder/DecoderList.hxx" +#include "storage/FileInfo.hxx" +#include "Log.hxx" + +#include <unistd.h> + +inline void +UpdateWalk::UpdateSongFile2(Directory &directory, + const char *name, const char *suffix, + const FileInfo &info) +{ + db_lock(); + Song *song = directory.FindSong(name); + db_unlock(); + + if (!directory_child_access(storage, directory, name, R_OK)) { + FormatError(update_domain, + "no read permissions on %s/%s", + directory.GetPath(), name); + if (song != nullptr) + editor.LockDeleteSong(directory, song); + + return; + } + + if (!(song != nullptr && info.mtime == song->mtime && + !walk_discard) && + UpdateContainerFile(directory, name, suffix, info)) { + if (song != nullptr) + editor.LockDeleteSong(directory, song); + + return; + } + + if (song == nullptr) { + FormatDebug(update_domain, "reading %s/%s", + directory.GetPath(), name); + song = Song::LoadFile(storage, name, directory); + if (song == nullptr) { + FormatDebug(update_domain, + "ignoring unrecognized file %s/%s", + directory.GetPath(), name); + return; + } + + db_lock(); + directory.AddSong(song); + db_unlock(); + + modified = true; + FormatDefault(update_domain, "added %s/%s", + directory.GetPath(), name); + } else if (info.mtime != song->mtime || walk_discard) { + FormatDefault(update_domain, "updating %s/%s", + directory.GetPath(), name); + if (!song->UpdateFile(storage)) { + FormatDebug(update_domain, + "deleting unrecognized file %s/%s", + directory.GetPath(), name); + editor.LockDeleteSong(directory, song); + } + + modified = true; + } +} + +bool +UpdateWalk::UpdateSongFile(Directory &directory, + const char *name, const char *suffix, + const FileInfo &info) +{ + if (!decoder_plugins_supports_suffix(suffix)) + return false; + + UpdateSongFile2(directory, name, suffix, info); + return true; +} diff --git a/src/db/update/Walk.cxx b/src/db/update/Walk.cxx new file mode 100644 index 000000000..f71faa86d --- /dev/null +++ b/src/db/update/Walk.cxx @@ -0,0 +1,491 @@ +/* + * Copyright (C) 2003-2014 The Music Player Daemon Project + * http://www.musicpd.org + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#include "config.h" /* must be first for large file support */ +#include "Walk.hxx" +#include "UpdateIO.hxx" +#include "Editor.hxx" +#include "UpdateDomain.hxx" +#include "db/DatabaseLock.hxx" +#include "db/PlaylistVector.hxx" +#include "db/Uri.hxx" +#include "db/plugins/simple/Directory.hxx" +#include "db/plugins/simple/Song.hxx" +#include "storage/StorageInterface.hxx" +#include "playlist/PlaylistRegistry.hxx" +#include "ExcludeList.hxx" +#include "config/ConfigGlobal.hxx" +#include "config/ConfigOption.hxx" +#include "fs/AllocatedPath.hxx" +#include "fs/Traits.hxx" +#include "fs/FileSystem.hxx" +#include "fs/Charset.hxx" +#include "storage/FileInfo.hxx" +#include "util/Alloc.hxx" +#include "util/UriUtil.hxx" +#include "util/Error.hxx" +#include "Log.hxx" + +#include <assert.h> +#include <sys/stat.h> +#include <string.h> +#include <stdlib.h> +#include <errno.h> +#include <memory> + +UpdateWalk::UpdateWalk(EventLoop &_loop, DatabaseListener &_listener, + Storage &_storage) + :cancel(false), + storage(_storage), + editor(_loop, _listener) +{ +#ifndef WIN32 + follow_inside_symlinks = + config_get_bool(CONF_FOLLOW_INSIDE_SYMLINKS, + DEFAULT_FOLLOW_INSIDE_SYMLINKS); + + follow_outside_symlinks = + config_get_bool(CONF_FOLLOW_OUTSIDE_SYMLINKS, + DEFAULT_FOLLOW_OUTSIDE_SYMLINKS); +#endif +} + +static void +directory_set_stat(Directory &dir, const FileInfo &info) +{ + dir.inode = info.inode; + dir.device = info.device; +} + +inline void +UpdateWalk::RemoveExcludedFromDirectory(Directory &directory, + const ExcludeList &exclude_list) +{ + db_lock(); + + directory.ForEachChildSafe([&](Directory &child){ + const auto name_fs = + AllocatedPath::FromUTF8(child.GetName()); + + if (name_fs.IsNull() || exclude_list.Check(name_fs)) { + editor.DeleteDirectory(&child); + modified = true; + } + }); + + directory.ForEachSongSafe([&](Song &song){ + assert(song.parent == &directory); + + const auto name_fs = AllocatedPath::FromUTF8(song.uri); + if (name_fs.IsNull() || exclude_list.Check(name_fs)) { + editor.DeleteSong(directory, &song); + modified = true; + } + }); + + db_unlock(); +} + +inline void +UpdateWalk::PurgeDeletedFromDirectory(Directory &directory) +{ + directory.ForEachChildSafe([&](Directory &child){ + if (DirectoryExists(storage, child)) + return; + + editor.LockDeleteDirectory(&child); + + modified = true; + }); + + directory.ForEachSongSafe([&](Song &song){ + if (!directory_child_is_regular(storage, directory, + song.uri)) { + editor.LockDeleteSong(directory, &song); + + modified = true; + } + }); + + for (auto i = directory.playlists.begin(), + end = directory.playlists.end(); + i != end;) { + if (!directory_child_is_regular(storage, directory, + i->name.c_str())) { + db_lock(); + i = directory.playlists.erase(i); + db_unlock(); + } else + ++i; + } +} + +#ifndef WIN32 +static bool +update_directory_stat(Storage &storage, Directory &directory) +{ + FileInfo info; + if (!GetInfo(storage, directory.GetPath(), info)) + return false; + + directory_set_stat(directory, info); + return true; +} +#endif + +/** + * Check the ancestors of the given #Directory and see if there's one + * with the same device/inode number, building a loop. + * + * @return 1 if a loop was found, 0 if not, -1 on I/O error + */ +static int +FindAncestorLoop(Storage &storage, Directory *parent, + unsigned inode, unsigned device) +{ +#ifndef WIN32 + if (device == 0 && inode == 0) + /* can't detect loops if the Storage does not support + these numbers */ + return 0; + + while (parent) { + if (parent->device == 0 && parent->inode == 0 && + !update_directory_stat(storage, *parent)) + return -1; + + if (parent->inode == inode && parent->device == device) { + LogDebug(update_domain, "recursive directory found"); + return 1; + } + + parent = parent->parent; + } +#else + (void)storage; + (void)parent; + (void)inode; + (void)device; +#endif + + return 0; +} + +inline bool +UpdateWalk::UpdatePlaylistFile(Directory &directory, + const char *name, const char *suffix, + const FileInfo &info) +{ + if (!playlist_suffix_supported(suffix)) + return false; + + PlaylistInfo pi(name, info.mtime); + + db_lock(); + if (directory.playlists.UpdateOrInsert(std::move(pi))) + modified = true; + db_unlock(); + return true; +} + +inline bool +UpdateWalk::UpdateRegularFile(Directory &directory, + const char *name, const FileInfo &info) +{ + const char *suffix = uri_get_suffix(name); + if (suffix == nullptr) + return false; + + return UpdateSongFile(directory, name, suffix, info) || + UpdateArchiveFile(directory, name, suffix, info) || + UpdatePlaylistFile(directory, name, suffix, info); +} + +void +UpdateWalk::UpdateDirectoryChild(Directory &directory, + const char *name, const FileInfo &info) +{ + assert(strchr(name, '/') == nullptr); + + if (info.IsRegular()) { + UpdateRegularFile(directory, name, info); + } else if (info.IsDirectory()) { + if (FindAncestorLoop(storage, &directory, + info.inode, info.device)) + return; + + db_lock(); + Directory *subdir = directory.MakeChild(name); + db_unlock(); + + assert(&directory == subdir->parent); + + if (!UpdateDirectory(*subdir, info)) + editor.LockDeleteDirectory(subdir); + } else { + FormatDebug(update_domain, + "%s is not a directory, archive or music", name); + } +} + +/* we don't look at "." / ".." nor files with newlines in their name */ +gcc_pure +static bool +skip_path(const char *name_utf8) +{ + return strchr(name_utf8, '\n') != nullptr; +} + +gcc_pure +bool +UpdateWalk::SkipSymlink(const Directory *directory, + const char *utf8_name) const +{ +#ifndef WIN32 + const auto path_fs = storage.MapChildFS(directory->GetPath(), + utf8_name); + if (path_fs.IsNull()) + /* not a local file: don't skip */ + return false; + + const auto target = ReadLink(path_fs); + if (target.IsNull()) + /* don't skip if this is not a symlink */ + return errno != EINVAL; + + if (!follow_inside_symlinks && !follow_outside_symlinks) { + /* ignore all symlinks */ + return true; + } else if (follow_inside_symlinks && follow_outside_symlinks) { + /* consider all symlinks */ + return false; + } + + const char *target_str = target.c_str(); + + if (PathTraitsFS::IsAbsolute(target_str)) { + /* if the symlink points to an absolute path, see if + that path is inside the music directory */ + const auto target_utf8 = PathToUTF8(target_str); + if (target_utf8.empty()) + return true; + + const char *relative = + storage.MapToRelativeUTF8(target_utf8.c_str()); + return relative != nullptr + ? !follow_inside_symlinks + : !follow_outside_symlinks; + } + + const char *p = target_str; + while (*p == '.') { + if (p[1] == '.' && PathTraitsFS::IsSeparator(p[2])) { + /* "../" moves to parent directory */ + directory = directory->parent; + if (directory == nullptr) { + /* we have moved outside the music + directory - skip this symlink + if such symlinks are not allowed */ + return !follow_outside_symlinks; + } + p += 3; + } else if (PathTraitsFS::IsSeparator(p[1])) + /* eliminate "./" */ + p += 2; + else + break; + } + + /* we are still in the music directory, so this symlink points + to a song which is already in the database - skip according + to the follow_inside_symlinks param*/ + return !follow_inside_symlinks; +#else + /* no symlink checking on WIN32 */ + + (void)directory; + (void)utf8_name; + + return false; +#endif +} + +bool +UpdateWalk::UpdateDirectory(Directory &directory, const FileInfo &info) +{ + assert(info.IsDirectory()); + + directory_set_stat(directory, info); + + Error error; + const std::auto_ptr<StorageDirectoryReader> reader(storage.OpenDirectory(directory.GetPath(), error)); + if (reader.get() == nullptr) { + LogError(error); + return false; + } + + ExcludeList exclude_list; + + { + const auto exclude_path_fs = + storage.MapChildFS(directory.GetPath(), ".mpdignore"); + if (!exclude_path_fs.IsNull()) + exclude_list.LoadFile(exclude_path_fs); + } + + if (!exclude_list.IsEmpty()) + RemoveExcludedFromDirectory(directory, exclude_list); + + PurgeDeletedFromDirectory(directory); + + const char *name_utf8; + while (!cancel && (name_utf8 = reader->Read()) != nullptr) { + if (skip_path(name_utf8)) + continue; + + { + const auto name_fs = AllocatedPath::FromUTF8(name_utf8); + if (name_fs.IsNull() || exclude_list.Check(name_fs)) + continue; + } + + if (SkipSymlink(&directory, name_utf8)) { + modified |= editor.DeleteNameIn(directory, name_utf8); + continue; + } + + FileInfo info2; + if (!GetInfo(*reader, info2)) { + modified |= editor.DeleteNameIn(directory, name_utf8); + continue; + } + + UpdateDirectoryChild(directory, name_utf8, info2); + } + + directory.mtime = info.mtime; + + return true; +} + +inline Directory * +UpdateWalk::DirectoryMakeChildChecked(Directory &parent, + const char *uri_utf8, + const char *name_utf8) +{ + db_lock(); + Directory *directory = parent.FindChild(name_utf8); + db_unlock(); + + if (directory != nullptr) { + if (directory->IsMount()) + directory = nullptr; + + return directory; + } + + FileInfo info; + if (!GetInfo(storage, uri_utf8, info) || + FindAncestorLoop(storage, &parent, info.inode, info.device)) + return nullptr; + + if (SkipSymlink(&parent, name_utf8)) + return nullptr; + + /* if we're adding directory paths, make sure to delete filenames + with potentially the same name */ + db_lock(); + Song *conflicting = parent.FindSong(name_utf8); + if (conflicting) + editor.DeleteSong(parent, conflicting); + + directory = parent.CreateChild(name_utf8); + db_unlock(); + + directory_set_stat(*directory, info); + return directory; +} + +inline Directory * +UpdateWalk::DirectoryMakeUriParentChecked(Directory &root, const char *uri) +{ + Directory *directory = &root; + char *duplicated = xstrdup(uri); + char *name_utf8 = duplicated, *slash; + + while ((slash = strchr(name_utf8, '/')) != nullptr) { + *slash = 0; + + if (*name_utf8 == 0) + continue; + + directory = DirectoryMakeChildChecked(*directory, + duplicated, + name_utf8); + if (directory == nullptr) + break; + + name_utf8 = slash + 1; + } + + free(duplicated); + return directory; +} + +inline void +UpdateWalk::UpdateUri(Directory &root, const char *uri) +{ + Directory *parent = DirectoryMakeUriParentChecked(root, uri); + if (parent == nullptr) + return; + + const char *name = PathTraitsUTF8::GetBase(uri); + + if (SkipSymlink(parent, name)) { + modified |= editor.DeleteNameIn(*parent, name); + return; + } + + FileInfo info; + if (!GetInfo(storage, uri, info)) { + modified |= editor.DeleteNameIn(*parent, name); + return; + } + + UpdateDirectoryChild(*parent, name, info); +} + +bool +UpdateWalk::Walk(Directory &root, const char *path, bool discard) +{ + walk_discard = discard; + modified = false; + + if (path != nullptr && !isRootDirectory(path)) { + UpdateUri(root, path); + } else { + FileInfo info; + if (!GetInfo(storage, "", info)) + return false; + + UpdateDirectory(root, info); + } + + return modified; +} diff --git a/src/db/update/Walk.hxx b/src/db/update/Walk.hxx new file mode 100644 index 000000000..cce276ab0 --- /dev/null +++ b/src/db/update/Walk.hxx @@ -0,0 +1,156 @@ +/* + * Copyright (C) 2003-2014 The Music Player Daemon Project + * http://www.musicpd.org + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#ifndef MPD_UPDATE_WALK_HXX +#define MPD_UPDATE_WALK_HXX + +#include "check.h" +#include "Editor.hxx" + +#include <sys/stat.h> + +struct stat; +struct FileInfo; +struct Directory; +struct ArchivePlugin; +class Storage; +class ExcludeList; + +class UpdateWalk final { +#ifdef ENABLE_ARCHIVE + friend class UpdateArchiveVisitor; +#endif + +#ifndef WIN32 + static constexpr bool DEFAULT_FOLLOW_INSIDE_SYMLINKS = true; + static constexpr bool DEFAULT_FOLLOW_OUTSIDE_SYMLINKS = true; + + bool follow_inside_symlinks; + bool follow_outside_symlinks; +#endif + + bool walk_discard; + bool modified; + + /** + * Set to true by the main thread when the update thread shall + * cancel as quickly as possible. Access to this flag is + * unprotected. + */ + volatile bool cancel; + + Storage &storage; + + DatabaseEditor editor; + +public: + UpdateWalk(EventLoop &_loop, DatabaseListener &_listener, + Storage &_storage); + + /** + * Cancel the current update and quit the Walk() method as + * soon as possible. + */ + void Cancel() { + cancel = true; + } + + /** + * Returns true if the database was modified. + */ + bool Walk(Directory &root, const char *path, bool discard); + +private: + gcc_pure + bool SkipSymlink(const Directory *directory, + const char *utf8_name) const; + + void RemoveExcludedFromDirectory(Directory &directory, + const ExcludeList &exclude_list); + + void PurgeDeletedFromDirectory(Directory &directory); + + void UpdateSongFile2(Directory &directory, + const char *name, const char *suffix, + const FileInfo &info); + + bool UpdateSongFile(Directory &directory, + const char *name, const char *suffix, + const FileInfo &info); + + bool UpdateContainerFile(Directory &directory, + const char *name, const char *suffix, + const FileInfo &info); + + +#ifdef ENABLE_ARCHIVE + void UpdateArchiveTree(Directory &parent, const char *name); + + bool UpdateArchiveFile(Directory &directory, + const char *name, const char *suffix, + const FileInfo &info); + + void UpdateArchiveFile(Directory &directory, const char *name, + const FileInfo &info, + const ArchivePlugin &plugin); + + +#else + bool UpdateArchiveFile(gcc_unused Directory &directory, + gcc_unused const char *name, + gcc_unused const char *suffix, + gcc_unused const FileInfo &info) { + return false; + } +#endif + + bool UpdatePlaylistFile(Directory &directory, + const char *name, const char *suffix, + const FileInfo &info); + + bool UpdateRegularFile(Directory &directory, + const char *name, const FileInfo &info); + + void UpdateDirectoryChild(Directory &directory, + const char *name, const FileInfo &info); + + bool UpdateDirectory(Directory &directory, const FileInfo &info); + + /** + * Create the specified directory object if it does not exist + * already or if the #stat object indicates that it has been + * modified since the last update. Returns nullptr when it + * exists already and is unmodified. + * + * The caller must lock the database. + */ + Directory *MakeDirectoryIfModified(Directory &parent, const char *name, + const FileInfo &info); + + Directory *DirectoryMakeChildChecked(Directory &parent, + const char *uri_utf8, + const char *name_utf8); + + Directory *DirectoryMakeUriParentChecked(Directory &root, + const char *uri); + + void UpdateUri(Directory &root, const char *uri); +}; + +#endif |