diff options
Diffstat (limited to '')
88 files changed, 8944 insertions, 1105 deletions
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..1485a21b6 --- /dev/null +++ b/src/db/DatabaseError.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_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, +}; + +extern const Domain db_domain; + +#endif diff --git a/src/db/DatabaseGlue.cxx b/src/db/DatabaseGlue.cxx new file mode 100644 index 000000000..30c244334 --- /dev/null +++ b/src/db/DatabaseGlue.cxx @@ -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. + */ + +#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, bool &is_simple, Error &error) +{ + const char *plugin_name = + param.GetBlockValue("plugin", "simple"); + is_simple = strcmp(plugin_name, "simple") == 0; + + 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..f562b6d41 --- /dev/null +++ b/src/db/DatabaseGlue.hxx @@ -0,0 +1,42 @@ +/* + * 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 + * @param is_simple returns whether this is the "simple" database + * plugin + */ +Database * +DatabaseGlobalInit(EventLoop &loop, DatabaseListener &listener, + const config_param ¶m, bool &is_simple, 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..814901227 --- /dev/null +++ b/src/db/DatabasePlaylist.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 "config.h" +#include "DatabasePlaylist.hxx" +#include "Selection.hxx" +#include "PlaylistFile.hxx" +#include "DatabasePlugin.hxx" +#include "DetachedSong.hxx" +#include "Mapper.hxx" + +#include <functional> + +static bool +AddSong(const char *playlist_path_utf8, + const LightSong &song, Error &error) +{ + return spl_append_song(playlist_path_utf8, map_song_detach(song), + error); +} + +bool +search_add_to_playlist(const Database &db, + 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, 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..5feafa190 --- /dev/null +++ b/src/db/DatabasePlaylist.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_DATABASE_PLAYLIST_HXX +#define MPD_DATABASE_PLAYLIST_HXX + +#include "Compiler.h" + +class Database; +class SongFilter; +class Error; + +gcc_nonnull(2,3) +bool +search_add_to_playlist(const Database &db, + 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..b0cb41502 --- /dev/null +++ b/src/db/DatabasePlugin.hxx @@ -0,0 +1,159 @@ +/* + * 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 + +#include "Visitor.hxx" +#include "tag/TagType.h" +#include "Compiler.h" + +#include <time.h> + +struct config_param; +struct DatabaseSelection; +struct db_visitor; +struct LightSong; +class Error; +class EventLoop; +class DatabaseListener; + +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; + } +}; + +class Database { +public: + /** + * Free instance data. + */ + virtual ~Database() {} + + /** + * 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, + VisitString visit_string, + Error &error) const = 0; + + virtual bool GetStats(const DatabaseSelection &selection, + DatabaseStats &stats, + Error &error) const = 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; +}; + +struct DatabasePlugin { + const char *name; + + /** + * Allocates and configures a database. + */ + Database *(*create)(EventLoop &loop, DatabaseListener &listener, + const config_param ¶m, + Error &error); +}; + +#endif diff --git a/src/db/DatabasePrint.cxx b/src/db/DatabasePrint.cxx new file mode 100644 index 000000000..669a804be --- /dev/null +++ b/src/db/DatabasePrint.cxx @@ -0,0 +1,249 @@ +/* + * 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 "DatabasePlugin.hxx" + +#include <functional> + +static bool +PrintDirectoryBrief(Client &client, const LightDirectory &directory) +{ + if (!directory.IsRoot()) + client_printf(client, "directory: %s\n", directory.GetPath()); + + return true; +} + +static bool +PrintDirectoryFull(Client &client, const LightDirectory &directory) +{ + if (!directory.IsRoot()) { + client_printf(client, "directory: %s\n", directory.GetPath()); + + if (directory.mtime > 0) + time_print(client, "Last-Modified", directory.mtime); + } + + return true; +} + +static void +print_playlist_in_directory(Client &client, + const char *directory, + const char *name_utf8) +{ + if (directory == nullptr) + client_printf(client, "playlist: %s\n", name_utf8); + else + client_printf(client, "playlist: %s/%s\n", + directory, name_utf8); +} + +static void +print_playlist_in_directory(Client &client, + const LightDirectory *directory, + const char *name_utf8) +{ + if (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, const LightSong &song) +{ + song_print_uri(client, song); + + if (song.tag->has_playlist) + /* this song file has an embedded CUE sheet */ + print_playlist_in_directory(client, song.directory, song.uri); + + return true; +} + +static bool +PrintSongFull(Client &client, const LightSong &song) +{ + song_print_info(client, song); + + if (song.tag->has_playlist) + /* this song file has an embedded CUE sheet */ + print_playlist_in_directory(client, song.directory, song.uri); + + return true; +} + +static bool +PrintPlaylistBrief(Client &client, + const PlaylistInfo &playlist, + const LightDirectory &directory) +{ + print_playlist_in_directory(client, &directory, playlist.name.c_str()); + return true; +} + +static bool +PrintPlaylistFull(Client &client, + const PlaylistInfo &playlist, + const LightDirectory &directory) +{ + print_playlist_in_directory(client, &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, 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), _1) + : VisitDirectory(); + const auto s = std::bind(full ? PrintSongFull : PrintSongBrief, + std::ref(client), _1); + const auto p = selection.filter == nullptr + ? std::bind(full ? PrintPlaylistFull : PrintPlaylistBrief, + std::ref(client), _1, _2) + : VisitPlaylist(); + + return db->Visit(selection, d, s, p, error); +} + +struct SearchStats { + int numberOfSongs; + unsigned long playTime; +}; + +static void printSearchStats(Client &client, SearchStats *stats) +{ + client_printf(client, "songs: %i\n", stats->numberOfSongs); + client_printf(client, "playtime: %li\n", stats->playTime); +} + +static bool +stats_visitor_song(SearchStats &stats, const LightSong &song) +{ + stats.numberOfSongs++; + stats.playTime += song.GetDuration(); + + return true; +} + +bool +searchStatsForSongsIn(Client &client, const char *name, + const SongFilter *filter, + Error &error) +{ + const Database *db = client.GetDatabase(error); + if (db == nullptr) + return false; + + const DatabaseSelection selection(name, true, filter); + + SearchStats stats; + stats.numberOfSongs = 0; + stats.playTime = 0; + + 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); + return true; +} + +bool +printAllIn(Client &client, const char *uri_utf8, Error &error) +{ + const DatabaseSelection selection(uri_utf8, true); + return db_selection_print(client, selection, false, error); +} + +bool +printInfoForAllIn(Client &client, const char *uri_utf8, + Error &error) +{ + const DatabaseSelection selection(uri_utf8, true); + return db_selection_print(client, selection, true, 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 char *value) +{ + client_printf(client, "%s: %s\n", tag_item_names[tag_type], value); + return true; +} + +bool +listAllUniqueTags(Client &client, int type, + 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 { + using namespace std::placeholders; + const auto f = std::bind(PrintUniqueTag, std::ref(client), + (TagType)type, _1); + return db->VisitUniqueTags(selection, (TagType)type, + f, error); + } +} diff --git a/src/db/DatabasePrint.hxx b/src/db/DatabasePrint.hxx new file mode 100644 index 000000000..2007e256b --- /dev/null +++ b/src/db/DatabasePrint.hxx @@ -0,0 +1,54 @@ +/* + * 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" + +class SongFilter; +struct DatabaseSelection; +class Client; +class Error; + +bool +db_selection_print(Client &client, const DatabaseSelection &selection, + bool full, Error &error); + +gcc_nonnull(2) +bool +printAllIn(Client &client, const char *uri_utf8, Error &error); + +gcc_nonnull(2) +bool +printInfoForAllIn(Client &client, const char *uri_utf8, + Error &error); + +gcc_nonnull(2) +bool +searchStatsForSongsIn(Client &client, const char *name, + const SongFilter *filter, + Error &error); + +bool +listAllUniqueTags(Client &client, int type, + const SongFilter *filter, + Error &error); + +#endif diff --git a/src/db/DatabaseQueue.cxx b/src/db/DatabaseQueue.cxx new file mode 100644 index 000000000..f2a0951a6 --- /dev/null +++ b/src/db/DatabaseQueue.cxx @@ -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. + */ + +#include "config.h" +#include "DatabaseQueue.hxx" +#include "DatabaseGlue.hxx" +#include "DatabasePlugin.hxx" +#include "Partition.hxx" +#include "Instance.hxx" +#include "util/Error.hxx" +#include "DetachedSong.hxx" +#include "Mapper.hxx" + +#include <functional> + +static bool +AddToQueue(Partition &partition, const LightSong &song, Error &error) +{ + PlaylistResult result = + partition.playlist.AppendSong(partition.pc, + map_song_detach(song), + nullptr); + if (result != PlaylistResult::SUCCESS) { + error.Set(playlist_domain, int(result), "Playlist error"); + return false; + } + + return true; +} + +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/DatabaseSave.cxx b/src/db/DatabaseSave.cxx new file mode 100644 index 000000000..e9c81442b --- /dev/null +++ b/src/db/DatabaseSave.cxx @@ -0,0 +1,154 @@ +/* + * 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 "DatabaseLock.hxx" +#include "DatabaseError.hxx" +#include "Directory.hxx" +#include "DirectorySave.hxx" +#include "fs/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 = 1; + +void +db_save_internal(FILE *fp, const Directory &music_root) +{ + fprintf(fp, "%s\n", DIRECTORY_INFO_BEGIN); + fprintf(fp, DB_FORMAT_PREFIX "%u\n", DB_FORMAT); + fprintf(fp, "%s%s\n", DIRECTORY_MPD_VERSION, VERSION); + fprintf(fp, "%s%s\n", DIRECTORY_FS_CHARSET, GetFSCharset()); + + for (unsigned i = 0; i < TAG_NUM_OF_ITEM_TYPES; ++i) + if (!ignore_tag_items[i]) + fprintf(fp, DB_TAG_PREFIX "%s\n", tag_item_names[i]); + + fprintf(fp, "%s\n", DIRECTORY_INFO_END); + + directory_save(fp, 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 != 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/DatabaseSave.hxx b/src/db/DatabaseSave.hxx new file mode 100644 index 000000000..3bd3377ae --- /dev/null +++ b/src/db/DatabaseSave.hxx @@ -0,0 +1,35 @@ +/* + * 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 + +#include <stdio.h> + +struct Directory; +class TextFile; +class Error; + +void +db_save_internal(FILE *file, const Directory &root); + +bool +db_load_internal(TextFile &file, Directory &root, Error &error); + +#endif diff --git a/src/db/DatabaseSimple.hxx b/src/db/DatabaseSimple.hxx new file mode 100644 index 000000000..1e527958f --- /dev/null +++ b/src/db/DatabaseSimple.hxx @@ -0,0 +1,47 @@ +/* + * 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_SIMPLE_HXX +#define MPD_DATABASE_SIMPLE_HXX + +#include "Compiler.h" + +struct config_param; +struct Directory; +class SimpleDatabase; +class Error; + +/** + * Check whether the default #SimpleDatabasePlugin is used. This + * allows using db_get_root(), db_save(), db_get_mtime() and + * db_exists(). + */ +bool +db_is_simple(void); + +/** + * Returns true if there is a valid database file on the disk. + * + * May only be used if db_is_simple() returns true. + */ +gcc_pure +bool +db_exists(); + +#endif diff --git a/src/db/DatabaseSong.cxx b/src/db/DatabaseSong.cxx new file mode 100644 index 000000000..f6229194b --- /dev/null +++ b/src/db/DatabaseSong.cxx @@ -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. + */ + +#include "config.h" +#include "DatabaseSong.hxx" +#include "DatabasePlugin.hxx" +#include "DetachedSong.hxx" +#include "Mapper.hxx" + +DetachedSong * +DatabaseDetachSong(const Database &db, const char *uri, Error &error) +{ + const LightSong *tmp = db.GetSong(uri, error); + if (tmp == nullptr) + return nullptr; + + DetachedSong *song = new DetachedSong(map_song_detach(*tmp)); + db.ReturnSong(tmp); + return song; +} diff --git a/src/db/DatabaseSong.hxx b/src/db/DatabaseSong.hxx new file mode 100644 index 000000000..1197068bc --- /dev/null +++ b/src/db/DatabaseSong.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_DATABASE_SONG_HXX +#define MPD_DATABASE_SONG_HXX + +#include "Compiler.h" + +class Database; +class DetachedSong; +class Error; + +/** + * 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 char *uri, Error &error); + +#endif diff --git a/src/db/Directory.cxx b/src/db/Directory.cxx new file mode 100644 index 000000000..9c7c83314 --- /dev/null +++ b/src/db/Directory.cxx @@ -0,0 +1,301 @@ +/* + * 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 "LightDirectory.hxx" +#include "Uri.hxx" +#include "SongFilter.hxx" +#include "PlaylistVector.hxx" +#include "db/DatabaseLock.hxx" +#include "SongSort.hxx" +#include "Song.hxx" +#include "LightSong.hxx" +#include "fs/Traits.hxx" +#include "util/Alloc.hxx" +#include "util/Error.hxx" + +extern "C" { +#include "util/list_sort.h" +} + +#include <glib.h> + +#include <assert.h> +#include <string.h> +#include <stdlib.h> + +Directory::Directory(const char *_path_utf8, Directory *_parent) + :parent(_parent), + mtime(0), have_stat(false), + path(_path_utf8) +{ + INIT_LIST_HEAD(&children); + INIT_LIST_HEAD(&songs); +} + +Directory::~Directory() +{ + Song *song, *ns; + directory_for_each_song_safe(song, ns, *this) + song->Free(); + + Directory *child, *n; + directory_for_each_child_safe(child, n, *this) + delete child; +} + +void +Directory::Delete() +{ + assert(holding_db_lock()); + assert(parent != nullptr); + + list_del(&siblings); + delete this; +} + +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); + + char *allocated; + const char *path_utf8; + if (IsRoot()) { + allocated = nullptr; + path_utf8 = name_utf8; + } else { + allocated = g_strconcat(GetPath(), + "/", name_utf8, nullptr); + path_utf8 = allocated; + } + + Directory *child = new Directory(path_utf8, this); + g_free(allocated); + + list_add_tail(&child->siblings, &children); + return child; +} + +const Directory * +Directory::FindChild(const char *name) const +{ + assert(holding_db_lock()); + + const Directory *child; + directory_for_each_child(child, *this) + if (strcmp(child->GetName(), name) == 0) + return child; + + return nullptr; +} + +void +Directory::PruneEmpty() +{ + assert(holding_db_lock()); + + Directory *child, *n; + directory_for_each_child_safe(child, n, *this) { + child->PruneEmpty(); + + if (child->IsEmpty()) + child->Delete(); + } +} + +Directory * +Directory::LookupDirectory(const char *uri) +{ + assert(holding_db_lock()); + assert(uri != nullptr); + + if (isRootDirectory(uri)) + return this; + + char *duplicated = xstrdup(uri), *name = duplicated; + + Directory *d = this; + while (1) { + char *slash = strchr(name, '/'); + if (slash == name) { + d = nullptr; + break; + } + + if (slash != nullptr) + *slash = '\0'; + + d = d->FindChild(name); + if (d == nullptr || slash == nullptr) + break; + + name = slash + 1; + } + + free(duplicated); + + return d; +} + +void +Directory::AddSong(Song *song) +{ + assert(holding_db_lock()); + assert(song != nullptr); + assert(song->parent == this); + + list_add_tail(&song->siblings, &songs); +} + +void +Directory::RemoveSong(Song *song) +{ + assert(holding_db_lock()); + assert(song != nullptr); + assert(song->parent == this); + + list_del(&song->siblings); +} + +const Song * +Directory::FindSong(const char *name_utf8) const +{ + assert(holding_db_lock()); + assert(name_utf8 != nullptr); + + Song *song; + directory_for_each_song(song, *this) { + assert(song->parent == this); + + if (strcmp(song->uri, name_utf8) == 0) + return song; + } + + return nullptr; +} + +Song * +Directory::LookupSong(const char *uri) +{ + char *duplicated, *base; + + assert(holding_db_lock()); + assert(uri != nullptr); + + duplicated = xstrdup(uri); + base = strrchr(duplicated, '/'); + + Directory *d = this; + if (base != nullptr) { + *base++ = 0; + d = d->LookupDirectory(duplicated); + if (d == nullptr) { + free(duplicated); + return nullptr; + } + } else + base = duplicated; + + Song *song = d->FindSong(base); + assert(song == nullptr || song->parent == d); + + free(duplicated); + return song; + +} + +static int +directory_cmp(gcc_unused void *priv, + struct list_head *_a, struct list_head *_b) +{ + const Directory *a = (const Directory *)_a; + const Directory *b = (const Directory *)_b; + return g_utf8_collate(a->path.c_str(), b->path.c_str()); +} + +void +Directory::Sort() +{ + assert(holding_db_lock()); + + list_sort(nullptr, &children, directory_cmp); + song_list_sort(&songs); + + Directory *child; + directory_for_each_child(child, *this) + 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 (visit_song) { + Song *song; + directory_for_each_song(song, *this) { + 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; + } + + Directory *child; + directory_for_each_child(child, *this) { + 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/Directory.hxx b/src/db/Directory.hxx new file mode 100644 index 000000000..705826a65 --- /dev/null +++ b/src/db/Directory.hxx @@ -0,0 +1,242 @@ +/* + * 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 "util/list.h" +#include "Compiler.h" +#include "db/Visitor.hxx" +#include "PlaylistVector.hxx" + +#include <string> + +#include <sys/types.h> + +#define DEVICE_INARCHIVE (dev_t)(-1) +#define DEVICE_CONTAINER (dev_t)(-2) + +#define directory_for_each_child(pos, directory) \ + list_for_each_entry(pos, &(directory).children, siblings) + +#define directory_for_each_child_safe(pos, n, directory) \ + list_for_each_entry_safe(pos, n, &(directory).children, siblings) + +#define directory_for_each_song(pos, directory) \ + list_for_each_entry(pos, &(directory).songs, siblings) + +#define directory_for_each_song_safe(pos, n, directory) \ + list_for_each_entry_safe(pos, n, &(directory).songs, siblings) + +struct Song; +struct db_visitor; +class SongFilter; +class Error; + +struct 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. + */ + struct list_head siblings; + + /** + * 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. + */ + struct list_head 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. + */ + struct list_head songs; + + PlaylistVector playlists; + + Directory *parent; + time_t mtime; + ino_t inode; + dev_t device; + bool have_stat; /* not needed if ino_t == dev_t == 0 is impossible */ + + std::string path; + +public: + Directory(const char *_path_utf8, Directory *_parent); + ~Directory(); + + /** + * Create a new root #Directory object. + */ + gcc_malloc + static Directory *NewRoot() { + return new Directory("", 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; + } + + /** + * Looks up a directory by its relative URI. + * + * @param uri the relative URI + * @return the Directory, or nullptr if none was found + */ + gcc_pure + Directory *LookupDirectory(const char *uri); + + gcc_pure + bool IsEmpty() const { + return list_empty(&children) && + list_empty(&songs) && + 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; + } + + /** + * 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)); + } + + /** + * Looks up a song by its relative URI. + * + * Caller must lock the #db_mutex. + * + * @param uri the relative URI + * @return the song, or nullptr if none was found + */ + gcc_pure + Song *LookupSong(const char *uri); + + /** + * 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/DirectorySave.cxx b/src/db/DirectorySave.cxx new file mode 100644 index 000000000..499f84734 --- /dev/null +++ b/src/db/DirectorySave.cxx @@ -0,0 +1,163 @@ +/* + * 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/TextFile.hxx" +#include "util/StringUtil.hxx" +#include "util/NumberParser.hxx" +#include "util/Error.hxx" +#include "util/Domain.hxx" + +#include <stddef.h> + +#define DIRECTORY_DIR "directory: " +#define DIRECTORY_MTIME "mtime: " +#define DIRECTORY_BEGIN "begin: " +#define DIRECTORY_END "end: " + +static constexpr Domain directory_domain("directory"); + +void +directory_save(FILE *fp, const Directory &directory) +{ + if (!directory.IsRoot()) { + fprintf(fp, DIRECTORY_MTIME "%lu\n", + (unsigned long)directory.mtime); + + fprintf(fp, "%s%s\n", DIRECTORY_BEGIN, directory.GetPath()); + } + + Directory *cur; + directory_for_each_child(cur, directory) { + fprintf(fp, DIRECTORY_DIR "%s\n", cur->GetName()); + + directory_save(fp, *cur); + + if (ferror(fp)) + return; + } + + Song *song; + directory_for_each_song(song, directory) + song_save(fp, *song); + + playlist_vector_save(fp, directory.playlists); + + if (!directory.IsRoot()) + fprintf(fp, DIRECTORY_END "%s\n", directory.GetPath()); +} + +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); + + const char *line = file.ReadLine(); + if (line == nullptr) { + error.Set(directory_domain, "Unexpected end of file"); + directory->Delete(); + return nullptr; + } + + if (StringStartsWith(line, DIRECTORY_MTIME)) { + directory->mtime = + ParseUint64(line + sizeof(DIRECTORY_MTIME) - 1); + + line = file.ReadLine(); + if (line == nullptr) { + error.Set(directory_domain, "Unexpected end of file"); + directory->Delete(); + return nullptr; + } + } + + if (!StringStartsWith(line, DIRECTORY_BEGIN)) { + 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/DirectorySave.hxx b/src/db/DirectorySave.hxx new file mode 100644 index 000000000..07e9e158b --- /dev/null +++ b/src/db/DirectorySave.hxx @@ -0,0 +1,35 @@ +/* + * 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 + +#include <stdio.h> + +struct Directory; +class TextFile; +class Error; + +void +directory_save(FILE *fp, const Directory &directory); + +bool +directory_load(TextFile &file, Directory &directory, Error &error); + +#endif diff --git a/src/db/Helpers.cxx b/src/db/Helpers.cxx new file mode 100644 index 000000000..579b83e15 --- /dev/null +++ b/src/db/Helpers.cxx @@ -0,0 +1,131 @@ +/* + * 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 "DatabasePlugin.hxx" +#include "LightSong.hxx" +#include "tag/Tag.hxx" + +#include <functional> +#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 bool +CollectTags(StringSet &set, TagType tag_type, const LightSong &song) +{ + const Tag *tag = song.tag; + + bool found = false; + for (unsigned i = 0; i < tag->num_items; ++i) { + if (tag->items[i]->type == tag_type) { + set.insert(tag->items[i]->value); + found = true; + } + } + + if (!found) + set.insert(""); + + return true; +} + +bool +VisitUniqueTags(const Database &db, const DatabaseSelection &selection, + TagType tag_type, + VisitString visit_string, + Error &error) +{ + StringSet set; + + using namespace std::placeholders; + const auto f = std::bind(CollectTags, std::ref(set), tag_type, _1); + if (!db.Visit(selection, f, error)) + return false; + + for (auto value : set) + if (!visit_string(value, error)) + return false; + + return true; +} + +static void +StatsVisitTag(DatabaseStats &stats, StringSet &artists, StringSet &albums, + const Tag &tag) +{ + if (tag.time > 0) + stats.total_duration += tag.time; + + for (unsigned i = 0; i < tag.num_items; ++i) { + const TagItem &item = *tag.items[i]; + + switch (item.type) { + case TAG_ARTIST: + artists.insert(item.value); + break; + + case TAG_ALBUM: + albums.insert(item.value); + 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..24db260c0 --- /dev/null +++ b/src/db/Helpers.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_MEMORY_DATABASE_PLUGIN_HXX +#define MPD_MEMORY_DATABASE_PLUGIN_HXX + +#include "Visitor.hxx" +#include "tag/TagType.h" + +class Error; +class Database; +struct DatabaseSelection; +struct DatabaseStats; + +bool +VisitUniqueTags(const Database &db, const DatabaseSelection &selection, + TagType tag_type, + VisitString visit_string, + Error &error); + +bool +GetStats(const Database &db, const DatabaseSelection &selection, + DatabaseStats &stats, Error &error); + +#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..8820ead5c --- /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 "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/ProxyDatabasePlugin.cxx b/src/db/ProxyDatabasePlugin.cxx deleted file mode 100644 index 00b5d445f..000000000 --- a/src/db/ProxyDatabasePlugin.cxx +++ /dev/null @@ -1,656 +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 "ProxyDatabasePlugin.hxx" -#include "DatabasePlugin.hxx" -#include "DatabaseSelection.hxx" -#include "DatabaseError.hxx" -#include "PlaylistVector.hxx" -#include "Directory.hxx" -#include "Song.hxx" -#include "SongFilter.hxx" -#include "Compiler.h" -#include "ConfigData.hxx" -#include "tag/TagBuilder.hxx" -#include "util/Error.hxx" -#include "util/Domain.hxx" -#include "protocol/Ack.hxx" - -#include <mpd/client.h> - -#include <cassert> -#include <string> -#include <list> - -class ProxyDatabase : public Database { - std::string host; - unsigned port; - - struct mpd_connection *connection; - Directory *root; - - /* this is mutable because GetStats() must be "const" */ - mutable time_t update_stamp; - -public: - static Database *Create(const config_param ¶m, - Error &error); - - 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 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, - VisitString visit_string, - Error &error) const override; - - virtual bool GetStats(const DatabaseSelection &selection, - DatabaseStats &stats, - Error &error) const override; - - virtual time_t GetUpdateStamp() const override { - return update_stamp; - } - -private: - bool Configure(const config_param ¶m, Error &error); - - bool Connect(Error &error); - bool CheckConnection(Error &error); - bool EnsureConnected(Error &error); -}; - -static constexpr Domain libmpdclient_domain("libmpdclient"); - -static constexpr struct { - TagType d; - enum mpd_tag_type s; -} tag_table[] = { - { TAG_ARTIST, MPD_TAG_ARTIST }, - { TAG_ALBUM, MPD_TAG_ALBUM }, - { TAG_ALBUM_ARTIST, MPD_TAG_ALBUM_ARTIST }, - { TAG_TITLE, MPD_TAG_TITLE }, - { TAG_TRACK, MPD_TAG_TRACK }, - { TAG_NAME, MPD_TAG_NAME }, - { TAG_GENRE, MPD_TAG_GENRE }, - { TAG_DATE, MPD_TAG_DATE }, - { TAG_COMPOSER, MPD_TAG_COMPOSER }, - { TAG_PERFORMER, MPD_TAG_PERFORMER }, - { TAG_COMMENT, MPD_TAG_COMMENT }, - { TAG_DISC, MPD_TAG_DISC }, - { TAG_MUSICBRAINZ_ARTISTID, MPD_TAG_MUSICBRAINZ_ARTISTID }, - { TAG_MUSICBRAINZ_ALBUMID, MPD_TAG_MUSICBRAINZ_ALBUMID }, - { TAG_MUSICBRAINZ_ALBUMARTISTID, - MPD_TAG_MUSICBRAINZ_ALBUMARTISTID }, - { TAG_MUSICBRAINZ_TRACKID, MPD_TAG_MUSICBRAINZ_TRACKID }, - { TAG_NUM_OF_ITEM_TYPES, MPD_TAG_COUNT } -}; - -gcc_const -static enum mpd_tag_type -Convert(TagType tag_type) -{ - for (auto i = &tag_table[0]; i->d != TAG_NUM_OF_ITEM_TYPES; ++i) - if (i->d == tag_type) - return i->s; - - return MPD_TAG_COUNT; -} - -static bool -CheckError(struct mpd_connection *connection, Error &error) -{ - const auto code = mpd_connection_get_error(connection); - if (code == MPD_ERROR_SUCCESS) - return true; - - if (code == MPD_ERROR_SERVER) { - /* libmpdclient's "enum mpd_server_error" is the same - as our "enum ack" */ - const auto server_error = - mpd_connection_get_server_error(connection); - error.Set(ack_domain, (int)server_error, - mpd_connection_get_error_message(connection)); - } else { - error.Set(libmpdclient_domain, (int)code, - mpd_connection_get_error_message(connection)); - } - - mpd_connection_clear_error(connection); - return false; -} - -static bool -SendConstraints(mpd_connection *connection, const SongFilter::Item &item) -{ - switch (item.GetTag()) { - mpd_tag_type tag; - -#if LIBMPDCLIENT_CHECK_VERSION(2,9,0) - case LOCATE_TAG_BASE_TYPE: - if (mpd_connection_cmp_server_version(connection, 0, 18, 0) < 0) - /* requires MPD 0.18 */ - return true; - - return mpd_search_add_base_constraint(connection, - MPD_OPERATOR_DEFAULT, - item.GetValue().c_str()); -#endif - - case LOCATE_TAG_FILE_TYPE: - return mpd_search_add_uri_constraint(connection, - MPD_OPERATOR_DEFAULT, - item.GetValue().c_str()); - - case LOCATE_TAG_ANY_TYPE: - return mpd_search_add_any_tag_constraint(connection, - MPD_OPERATOR_DEFAULT, - item.GetValue().c_str()); - - default: - tag = Convert(TagType(item.GetTag())); - if (tag == MPD_TAG_COUNT) - return true; - - return mpd_search_add_tag_constraint(connection, - MPD_OPERATOR_DEFAULT, - tag, - item.GetValue().c_str()); - } -} - -static bool -SendConstraints(mpd_connection *connection, const SongFilter &filter) -{ - for (const auto &i : filter.GetItems()) - if (!SendConstraints(connection, i)) - return false; - - return true; -} - -static bool -SendConstraints(mpd_connection *connection, const DatabaseSelection &selection) -{ -#if LIBMPDCLIENT_CHECK_VERSION(2,9,0) - if (!selection.uri.empty() && - mpd_connection_cmp_server_version(connection, 0, 18, 0) >= 0) { - /* requires MPD 0.18 */ - if (!mpd_search_add_base_constraint(connection, - MPD_OPERATOR_DEFAULT, - selection.uri.c_str())) - return false; - } -#endif - - if (selection.filter != nullptr && - !SendConstraints(connection, *selection.filter)) - return false; - - return true; -} - -Database * -ProxyDatabase::Create(const config_param ¶m, Error &error) -{ - ProxyDatabase *db = new ProxyDatabase(); - if (!db->Configure(param, error)) { - delete db; - db = nullptr; - } - - return db; -} - -bool -ProxyDatabase::Configure(const config_param ¶m, gcc_unused Error &error) -{ - host = param.GetBlockValue("host", ""); - port = param.GetBlockValue("port", 0u); - - return true; -} - -bool -ProxyDatabase::Open(Error &error) -{ - if (!Connect(error)) - return false; - - root = Directory::NewRoot(); - update_stamp = 0; - - return true; -} - -void -ProxyDatabase::Close() -{ - root->Free(); - - if (connection != nullptr) - mpd_connection_free(connection); -} - -bool -ProxyDatabase::Connect(Error &error) -{ - const char *_host = host.empty() ? nullptr : host.c_str(); - connection = mpd_connection_new(_host, port, 0); - if (connection == nullptr) { - error.Set(libmpdclient_domain, (int)MPD_ERROR_OOM, - "Out of memory"); - return false; - } - - if (!CheckError(connection, error)) { - if (connection != nullptr) { - mpd_connection_free(connection); - connection = nullptr; - } - - return false; - } - - return true; -} - -bool -ProxyDatabase::CheckConnection(Error &error) -{ - assert(connection != nullptr); - - if (!mpd_connection_clear_error(connection)) { - mpd_connection_free(connection); - return Connect(error); - } - - return true; -} - -bool -ProxyDatabase::EnsureConnected(Error &error) -{ - return connection != nullptr - ? CheckConnection(error) - : Connect(error); -} - -static Song * -Convert(const struct mpd_song *song); - -Song * -ProxyDatabase::GetSong(const char *uri, Error &error) const -{ - // TODO: eliminate the const_cast - if (!const_cast<ProxyDatabase *>(this)->EnsureConnected(error)) - return nullptr; - - if (!mpd_send_list_meta(connection, uri)) { - CheckError(connection, error); - return nullptr; - } - - 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); - return nullptr; - } - - if (song2 == nullptr) - error.Format(db_domain, DB_NOT_FOUND, "No such song: %s", uri); - - return song2; -} - -void -ProxyDatabase::ReturnSong(Song *song) const -{ - assert(song != nullptr); - assert(song->IsInDatabase()); - assert(song->IsDetached()); - - song->Free(); -} - -static bool -Visit(struct mpd_connection *connection, const char *uri, - bool recursive, const SongFilter *filter, - VisitDirectory visit_directory, VisitSong visit_song, - VisitPlaylist visit_playlist, Error &error); - -static bool -Visit(struct mpd_connection *connection, - bool recursive, const SongFilter *filter, - const struct mpd_directory *directory, - VisitDirectory visit_directory, VisitSong visit_song, - VisitPlaylist visit_playlist, Error &error) -{ - const char *path = mpd_directory_get_path(directory); - - if (visit_directory) { - Directory *d = Directory::NewGeneric(path, &detached_root); - bool success = visit_directory(*d, error); - d->Free(); - if (!success) - return false; - } - - if (recursive && - !Visit(connection, path, recursive, filter, - visit_directory, visit_song, visit_playlist, error)) - return false; - - 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); - s->start_ms = mpd_song_get_start(song) * 1000; - s->end_ms = mpd_song_get_end(song) * 1000; - - 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) -{ - return filter == nullptr || filter->Match(song); -} - -static bool -Visit(const SongFilter *filter, - const struct 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; -} - -static bool -Visit(const struct mpd_playlist *playlist, - VisitPlaylist visit_playlist, Error &error) -{ - if (!visit_playlist) - return true; - - PlaylistInfo p(mpd_playlist_get_path(playlist), - mpd_playlist_get_last_modified(playlist)); - - return visit_playlist(p, detached_root, error); -} - -class ProxyEntity { - struct mpd_entity *entity; - -public: - explicit ProxyEntity(struct mpd_entity *_entity) - :entity(_entity) {} - - ProxyEntity(const ProxyEntity &other) = delete; - - ProxyEntity(ProxyEntity &&other) - :entity(other.entity) { - other.entity = nullptr; - } - - ~ProxyEntity() { - if (entity != nullptr) - mpd_entity_free(entity); - } - - ProxyEntity &operator=(const ProxyEntity &other) = delete; - - operator const struct mpd_entity *() const { - return entity; - } -}; - -static std::list<ProxyEntity> -ReceiveEntities(struct mpd_connection *connection) -{ - std::list<ProxyEntity> entities; - struct mpd_entity *entity; - while ((entity = mpd_recv_entity(connection)) != nullptr) - entities.push_back(ProxyEntity(entity)); - - mpd_response_finish(connection); - return entities; -} - -static bool -Visit(struct mpd_connection *connection, const char *uri, - bool recursive, const SongFilter *filter, - VisitDirectory visit_directory, VisitSong visit_song, - VisitPlaylist visit_playlist, Error &error) -{ - if (!mpd_send_list_meta(connection, uri)) - return CheckError(connection, error); - - std::list<ProxyEntity> entities(ReceiveEntities(connection)); - if (!CheckError(connection, error)) - return false; - - for (const auto &entity : entities) { - switch (mpd_entity_get_type(entity)) { - case MPD_ENTITY_TYPE_UNKNOWN: - break; - - case MPD_ENTITY_TYPE_DIRECTORY: - if (!Visit(connection, recursive, filter, - mpd_entity_get_directory(entity), - visit_directory, visit_song, visit_playlist, - error)) - return false; - break; - - case MPD_ENTITY_TYPE_SONG: - if (!Visit(filter, - mpd_entity_get_song(entity), visit_song, - error)) - return false; - break; - - case MPD_ENTITY_TYPE_PLAYLIST: - if (!Visit(mpd_entity_get_playlist(entity), - visit_playlist, error)) - return false; - break; - } - } - - return CheckError(connection, error); -} - -static bool -SearchSongs(struct mpd_connection *connection, - const DatabaseSelection &selection, - VisitSong visit_song, - Error &error) -{ - assert(selection.recursive); - assert(visit_song); - - const bool exact = selection.filter == nullptr || - !selection.filter->HasFoldCase(); - - if (!mpd_search_db_songs(connection, exact) || - !SendConstraints(connection, selection) || - !mpd_search_commit(connection)) - return CheckError(connection, error); - - bool result = true; - struct mpd_song *song; - while (result && (song = mpd_recv_song(connection)) != nullptr) { - Song *song2 = Convert(song); - mpd_song_free(song); - - result = !Match(selection.filter, *song2) || - visit_song(*song2, error); - song2->Free(); - } - - mpd_response_finish(connection); - return result && CheckError(connection, error); -} - -bool -ProxyDatabase::Visit(const DatabaseSelection &selection, - VisitDirectory visit_directory, - VisitSong visit_song, - VisitPlaylist visit_playlist, - Error &error) const -{ - // TODO: eliminate the const_cast - if (!const_cast<ProxyDatabase *>(this)->EnsureConnected(error)) - return nullptr; - - if (!visit_directory && !visit_playlist && selection.recursive) - /* this optimized code path can only be used under - certain conditions */ - return ::SearchSongs(connection, selection, visit_song, error); - - /* fall back to recursive walk (slow!) */ - return ::Visit(connection, selection.uri.c_str(), - selection.recursive, selection.filter, - visit_directory, visit_song, visit_playlist, - error); -} - -bool -ProxyDatabase::VisitUniqueTags(const DatabaseSelection &selection, - TagType tag_type, - VisitString visit_string, - Error &error) const -{ - // TODO: eliminate the const_cast - if (!const_cast<ProxyDatabase *>(this)->EnsureConnected(error)) - return nullptr; - - enum mpd_tag_type tag_type2 = Convert(tag_type); - if (tag_type2 == MPD_TAG_COUNT) { - error.Set(libmpdclient_domain, "Unsupported tag"); - return false; - } - - if (!mpd_search_db_tags(connection, tag_type2)) - return CheckError(connection, error); - - if (!SendConstraints(connection, selection)) - return CheckError(connection, error); - - if (!mpd_search_commit(connection)) - return CheckError(connection, error); - - bool result = true; - - struct mpd_pair *pair; - while (result && - (pair = mpd_recv_pair_tag(connection, tag_type2)) != nullptr) { - result = visit_string(pair->value, error); - mpd_return_pair(connection, pair); - } - - return mpd_response_finish(connection) && - CheckError(connection, error) && - result; -} - -bool -ProxyDatabase::GetStats(const DatabaseSelection &selection, - DatabaseStats &stats, Error &error) const -{ - // TODO: match - (void)selection; - - // TODO: eliminate the const_cast - if (!const_cast<ProxyDatabase *>(this)->EnsureConnected(error)) - return nullptr; - - struct mpd_stats *stats2 = - mpd_run_stats(connection); - if (stats2 == nullptr) - return CheckError(connection, error); - - update_stamp = (time_t)mpd_stats_get_db_update_time(stats2); - - stats.song_count = mpd_stats_get_number_of_songs(stats2); - stats.total_duration = mpd_stats_get_db_play_time(stats2); - stats.artist_count = mpd_stats_get_number_of_artists(stats2); - stats.album_count = mpd_stats_get_number_of_albums(stats2); - mpd_stats_free(stats2); - - return true; -} - -const DatabasePlugin proxy_db_plugin = { - "proxy", - ProxyDatabase::Create, -}; diff --git a/src/db/ProxyDatabasePlugin.hxx b/src/db/ProxyDatabasePlugin.hxx deleted file mode 100644 index 576c01c69..000000000 --- a/src/db/ProxyDatabasePlugin.hxx +++ /dev/null @@ -1,27 +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. - */ - -#ifndef MPD_PROXY_DATABASE_PLUGIN_HXX -#define MPD_PROXY_DATABASE_PLUGIN_HXX - -struct DatabasePlugin; - -extern const DatabasePlugin proxy_db_plugin; - -#endif diff --git a/src/db/Registry.cxx b/src/db/Registry.cxx new file mode 100644 index 000000000..295d3cf2a --- /dev/null +++ b/src/db/Registry.cxx @@ -0,0 +1,47 @@ +/* + * 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 "plugins/SimpleDatabasePlugin.hxx" +#include "plugins/ProxyDatabasePlugin.hxx" +#include "plugins/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..96382eed7 --- /dev/null +++ b/src/db/Selection.cxx @@ -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. + */ + +#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::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..a39ce7afe --- /dev/null +++ b/src/db/Selection.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_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 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/SimpleDatabasePlugin.hxx b/src/db/SimpleDatabasePlugin.hxx deleted file mode 100644 index dfe981dd8..000000000 --- a/src/db/SimpleDatabasePlugin.hxx +++ /dev/null @@ -1,99 +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. - */ - -#ifndef MPD_SIMPLE_DATABASE_PLUGIN_HXX -#define MPD_SIMPLE_DATABASE_PLUGIN_HXX - -#include "DatabasePlugin.hxx" -#include "fs/AllocatedPath.hxx" -#include "Compiler.h" - -#include <cassert> - -struct Directory; - -class SimpleDatabase : public Database { - AllocatedPath path; - std::string path_utf8; - - Directory *root; - - time_t mtime; - -#ifndef NDEBUG - unsigned borrowed_song_count; -#endif - - SimpleDatabase() - :path(AllocatedPath::Null()) {} - -public: - gcc_pure - Directory *GetRoot() { - assert(root != NULL); - - return root; - } - - bool Save(Error &error); - - static Database *Create(const config_param ¶m, - Error &error); - - 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 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, - VisitString visit_string, - Error &error) const override; - - virtual bool GetStats(const DatabaseSelection &selection, - DatabaseStats &stats, - Error &error) const override; - - virtual time_t GetUpdateStamp() const override { - return mtime; - } - -protected: - bool Configure(const config_param ¶m, Error &error); - - gcc_pure - bool Check(Error &error) const; - - bool Load(Error &error); - - gcc_pure - const Directory *LookupDirectory(const char *uri) const; -}; - -extern const DatabasePlugin simple_db_plugin; - -#endif diff --git a/src/db/Song.cxx b/src/db/Song.cxx new file mode 100644 index 000000000..1c3fa0b64 --- /dev/null +++ b/src/db/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 "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/Song.hxx b/src/db/Song.hxx new file mode 100644 index 000000000..616a566eb --- /dev/null +++ b/src/db/Song.hxx @@ -0,0 +1,114 @@ +/* + * 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 "util/list.h" +#include "tag/Tag.hxx" +#include "Compiler.h" + +#include <string> + +#include <assert.h> +#include <time.h> + +struct LightSong; +struct Directory; +class DetachedSong; +class Storage; + +/** + * A song file inside the configured music directory. + */ +struct Song { + /** + * 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. + */ + struct list_head siblings; + + Tag tag; + + /** + * The #Directory that contains this song. May be nullptr if + * the current database plugin does not manage the parent + * 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. If #parent is nullptr, then this is the URI + * relative to the music directory. + */ + 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(); + + /** + * 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; +}; + +#endif diff --git a/src/db/SongSort.cxx b/src/db/SongSort.cxx new file mode 100644 index 000000000..dcea033b6 --- /dev/null +++ b/src/db/SongSort.cxx @@ -0,0 +1,114 @@ +/* + * 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" + +extern "C" { +#include "util/list_sort.h" +} + +#include <glib.h> + +#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 g_utf8_collate(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 */ +static int +song_cmp(gcc_unused void *priv, struct list_head *_a, struct list_head *_b) +{ + const Song *a = (const Song *)_a; + const Song *b = (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; + + /* then sort by disc */ + ret = compare_tag_item(a->tag, b->tag, TAG_DISC); + if (ret != 0) + return ret; + + /* then by track number */ + ret = compare_tag_item(a->tag, b->tag, TAG_TRACK); + if (ret != 0) + return ret; + + /* still no difference? compare file name */ + return g_utf8_collate(a->uri, b->uri); +} + +void +song_list_sort(struct list_head *songs) +{ + list_sort(nullptr, songs, song_cmp); +} diff --git a/src/db/SongSort.hxx b/src/db/SongSort.hxx new file mode 100644 index 000000000..28b903532 --- /dev/null +++ b/src/db/SongSort.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_SONG_SORT_HXX +#define MPD_SONG_SORT_HXX + +struct list_head; + +void +song_list_sort(list_head *songs); + +#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..0ec29bf49 --- /dev/null +++ b/src/db/Visitor.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_VISITOR_HXX +#define MPD_DATABASE_VISITOR_HXX + +#include <functional> + +struct LightDirectory; +struct LightSong; +struct PlaylistInfo; +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 char *, Error &)> VisitString; + +#endif diff --git a/src/db/plugins/LazyDatabase.cxx b/src/db/plugins/LazyDatabase.cxx new file mode 100644 index 000000000..6a01ffb82 --- /dev/null +++ b/src/db/plugins/LazyDatabase.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" +#include "LazyDatabase.hxx" + +#include <assert.h> + +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, + VisitString visit_string, + Error &error) const +{ + return EnsureOpen(error) && + db->VisitUniqueTags(selection, tag_type, visit_string, 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..336b8558f --- /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/DatabasePlugin.hxx" + +/** + * 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) + :db(_db), open(false) {} + + 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, + VisitString visit_string, + 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/plugins/ProxyDatabasePlugin.cxx b/src/db/plugins/ProxyDatabasePlugin.cxx new file mode 100644 index 000000000..cfd90fc5c --- /dev/null +++ b/src/db/plugins/ProxyDatabasePlugin.cxx @@ -0,0 +1,781 @@ +/* + * 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 "ProxyDatabasePlugin.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 "SongFilter.hxx" +#include "Compiler.h" +#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 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; + + /* 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: + ProxyDatabase(EventLoop &_loop, DatabaseListener &_listener) + :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 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, + VisitString visit_string, + Error &error) const override; + + virtual bool GetStats(const DatabaseSelection &selection, + DatabaseStats &stats, + Error &error) const override; + + virtual time_t GetUpdateStamp() const override { + return update_stamp; + } + +private: + bool Configure(const config_param ¶m, Error &error); + + 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"); + +static constexpr struct { + TagType d; + enum mpd_tag_type s; +} tag_table[] = { + { TAG_ARTIST, MPD_TAG_ARTIST }, + { TAG_ALBUM, MPD_TAG_ALBUM }, + { TAG_ALBUM_ARTIST, MPD_TAG_ALBUM_ARTIST }, + { TAG_TITLE, MPD_TAG_TITLE }, + { TAG_TRACK, MPD_TAG_TRACK }, + { TAG_NAME, MPD_TAG_NAME }, + { TAG_GENRE, MPD_TAG_GENRE }, + { TAG_DATE, MPD_TAG_DATE }, + { TAG_COMPOSER, MPD_TAG_COMPOSER }, + { TAG_PERFORMER, MPD_TAG_PERFORMER }, + { TAG_COMMENT, MPD_TAG_COMMENT }, + { TAG_DISC, MPD_TAG_DISC }, + { TAG_MUSICBRAINZ_ARTISTID, MPD_TAG_MUSICBRAINZ_ARTISTID }, + { TAG_MUSICBRAINZ_ALBUMID, MPD_TAG_MUSICBRAINZ_ALBUMID }, + { TAG_MUSICBRAINZ_ALBUMARTISTID, + MPD_TAG_MUSICBRAINZ_ALBUMARTISTID }, + { TAG_MUSICBRAINZ_TRACKID, MPD_TAG_MUSICBRAINZ_TRACKID }, + { 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); + tag = &tag2; + mtime = mpd_song_get_last_modified(song); + start_ms = mpd_song_get_start(song) * 1000; + end_ms = mpd_song_get_end(song) * 1000; + + 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) +{ + for (auto i = &tag_table[0]; i->d != TAG_NUM_OF_ITEM_TYPES; ++i) + if (i->d == tag_type) + return i->s; + + return MPD_TAG_COUNT; +} + +static bool +CheckError(struct mpd_connection *connection, Error &error) +{ + const auto code = mpd_connection_get_error(connection); + if (code == MPD_ERROR_SUCCESS) + return true; + + if (code == MPD_ERROR_SERVER) { + /* libmpdclient's "enum mpd_server_error" is the same + as our "enum ack" */ + const auto server_error = + mpd_connection_get_server_error(connection); + error.Set(ack_domain, (int)server_error, + mpd_connection_get_error_message(connection)); + } else { + error.Set(libmpdclient_domain, (int)code, + mpd_connection_get_error_message(connection)); + } + + mpd_connection_clear_error(connection); + return false; +} + +static bool +SendConstraints(mpd_connection *connection, const SongFilter::Item &item) +{ + switch (item.GetTag()) { + mpd_tag_type tag; + +#if LIBMPDCLIENT_CHECK_VERSION(2,9,0) + case LOCATE_TAG_BASE_TYPE: + if (mpd_connection_cmp_server_version(connection, 0, 18, 0) < 0) + /* requires MPD 0.18 */ + return true; + + return mpd_search_add_base_constraint(connection, + MPD_OPERATOR_DEFAULT, + item.GetValue().c_str()); +#endif + + case LOCATE_TAG_FILE_TYPE: + return mpd_search_add_uri_constraint(connection, + MPD_OPERATOR_DEFAULT, + item.GetValue().c_str()); + + case LOCATE_TAG_ANY_TYPE: + return mpd_search_add_any_tag_constraint(connection, + MPD_OPERATOR_DEFAULT, + item.GetValue().c_str()); + + default: + tag = Convert(TagType(item.GetTag())); + if (tag == MPD_TAG_COUNT) + return true; + + return mpd_search_add_tag_constraint(connection, + MPD_OPERATOR_DEFAULT, + tag, + item.GetValue().c_str()); + } +} + +static bool +SendConstraints(mpd_connection *connection, const SongFilter &filter) +{ + for (const auto &i : filter.GetItems()) + if (!SendConstraints(connection, i)) + return false; + + return true; +} + +static bool +SendConstraints(mpd_connection *connection, const DatabaseSelection &selection) +{ +#if LIBMPDCLIENT_CHECK_VERSION(2,9,0) + if (!selection.uri.empty() && + mpd_connection_cmp_server_version(connection, 0, 18, 0) >= 0) { + /* requires MPD 0.18 */ + if (!mpd_search_add_base_constraint(connection, + MPD_OPERATOR_DEFAULT, + selection.uri.c_str())) + return false; + } +#endif + + if (selection.filter != nullptr && + !SendConstraints(connection, *selection.filter)) + return false; + + return true; +} + +Database * +ProxyDatabase::Create(EventLoop &loop, DatabaseListener &listener, + const config_param ¶m, Error &error) +{ + ProxyDatabase *db = new ProxyDatabase(loop, listener); + if (!db->Configure(param, error)) { + delete db; + db = nullptr; + } + + return db; +} + +bool +ProxyDatabase::Configure(const config_param ¶m, gcc_unused Error &error) +{ + host = param.GetBlockValue("host", ""); + port = param.GetBlockValue("port", 0u); + + return true; +} + +bool +ProxyDatabase::Open(Error &error) +{ + if (!Connect(error)) + return false; + + update_stamp = 0; + + return true; +} + +void +ProxyDatabase::Close() +{ + if (connection != nullptr) + Disconnect(); +} + +bool +ProxyDatabase::Connect(Error &error) +{ + const char *_host = host.empty() ? nullptr : host.c_str(); + connection = mpd_connection_new(_host, port, 0); + if (connection == nullptr) { + error.Set(libmpdclient_domain, (int)MPD_ERROR_OOM, + "Out of memory"); + return false; + } + + idle_received = unsigned(-1); + is_idle = false; + + SocketMonitor::Open(mpd_async_get_fd(mpd_connection_get_async(connection))); + IdleMonitor::Schedule(); + + if (!CheckError(connection, error)) { + if (connection != nullptr) + Disconnect(); + + return false; + } + + return true; +} + +bool +ProxyDatabase::CheckConnection(Error &error) +{ + assert(connection != nullptr); + + if (!mpd_connection_clear_error(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; +} + +bool +ProxyDatabase::EnsureConnected(Error &error) +{ + return connection != nullptr + ? CheckConnection(error) + : Connect(error); +} + +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; + + /* 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 + if (!const_cast<ProxyDatabase *>(this)->EnsureConnected(error)) + return nullptr; + + if (!mpd_send_list_meta(connection, uri)) { + CheckError(connection, error); + return nullptr; + } + + struct mpd_song *song = mpd_recv_song(connection); + if (!mpd_response_finish(connection) && + !CheckError(connection, error)) { + if (song != nullptr) + mpd_song_free(song); + return nullptr; + } + + if (song == nullptr) { + error.Format(db_domain, DB_NOT_FOUND, "No such song: %s", uri); + return nullptr; + } + + return new AllocatedProxySong(song); +} + +void +ProxyDatabase::ReturnSong(const LightSong *_song) const +{ + assert(_song != nullptr); + + AllocatedProxySong *song = (AllocatedProxySong *) + const_cast<LightSong *>(_song); + delete song; +} + +static bool +Visit(struct mpd_connection *connection, const char *uri, + bool recursive, const SongFilter *filter, + VisitDirectory visit_directory, VisitSong visit_song, + VisitPlaylist visit_playlist, Error &error); + +static bool +Visit(struct mpd_connection *connection, + bool recursive, const SongFilter *filter, + const struct mpd_directory *directory, + VisitDirectory visit_directory, VisitSong visit_song, + 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 && + !visit_directory(LightDirectory(path, mtime), error)) + return false; + + if (recursive && + !Visit(connection, path, recursive, filter, + visit_directory, visit_song, visit_playlist, error)) + return false; + + return true; +} + +gcc_pure +static bool +Match(const SongFilter *filter, const LightSong &song) +{ + return filter == nullptr || filter->Match(song); +} + +static bool +Visit(const SongFilter *filter, + const mpd_song *_song, + VisitSong visit_song, Error &error) +{ + if (!visit_song) + return true; + + const ProxySong song(_song); + return !Match(filter, song) || visit_song(song, error); +} + +static bool +Visit(const struct mpd_playlist *playlist, + VisitPlaylist visit_playlist, Error &error) +{ + if (!visit_playlist) + return true; + + PlaylistInfo p(mpd_playlist_get_path(playlist), + mpd_playlist_get_last_modified(playlist)); + + return visit_playlist(p, LightDirectory::Root(), error); +} + +class ProxyEntity { + struct mpd_entity *entity; + +public: + explicit ProxyEntity(struct mpd_entity *_entity) + :entity(_entity) {} + + ProxyEntity(const ProxyEntity &other) = delete; + + ProxyEntity(ProxyEntity &&other) + :entity(other.entity) { + other.entity = nullptr; + } + + ~ProxyEntity() { + if (entity != nullptr) + mpd_entity_free(entity); + } + + ProxyEntity &operator=(const ProxyEntity &other) = delete; + + operator const struct mpd_entity *() const { + return entity; + } +}; + +static std::list<ProxyEntity> +ReceiveEntities(struct mpd_connection *connection) +{ + std::list<ProxyEntity> entities; + struct mpd_entity *entity; + while ((entity = mpd_recv_entity(connection)) != nullptr) + entities.push_back(ProxyEntity(entity)); + + mpd_response_finish(connection); + return entities; +} + +static bool +Visit(struct mpd_connection *connection, const char *uri, + bool recursive, const SongFilter *filter, + VisitDirectory visit_directory, VisitSong visit_song, + VisitPlaylist visit_playlist, Error &error) +{ + if (!mpd_send_list_meta(connection, uri)) + return CheckError(connection, error); + + std::list<ProxyEntity> entities(ReceiveEntities(connection)); + if (!CheckError(connection, error)) + return false; + + for (const auto &entity : entities) { + switch (mpd_entity_get_type(entity)) { + case MPD_ENTITY_TYPE_UNKNOWN: + break; + + case MPD_ENTITY_TYPE_DIRECTORY: + if (!Visit(connection, recursive, filter, + mpd_entity_get_directory(entity), + visit_directory, visit_song, visit_playlist, + error)) + return false; + break; + + case MPD_ENTITY_TYPE_SONG: + if (!Visit(filter, + mpd_entity_get_song(entity), visit_song, + error)) + return false; + break; + + case MPD_ENTITY_TYPE_PLAYLIST: + if (!Visit(mpd_entity_get_playlist(entity), + visit_playlist, error)) + return false; + break; + } + } + + return CheckError(connection, error); +} + +static bool +SearchSongs(struct mpd_connection *connection, + const DatabaseSelection &selection, + VisitSong visit_song, + Error &error) +{ + assert(selection.recursive); + assert(visit_song); + + const bool exact = selection.filter == nullptr || + !selection.filter->HasFoldCase(); + + if (!mpd_search_db_songs(connection, exact) || + !SendConstraints(connection, selection) || + !mpd_search_commit(connection)) + return CheckError(connection, error); + + bool result = true; + struct mpd_song *song; + while (result && (song = mpd_recv_song(connection)) != nullptr) { + AllocatedProxySong song2(song); + + result = !Match(selection.filter, song2) || + visit_song(song2, error); + } + + mpd_response_finish(connection); + return result && CheckError(connection, error); +} + +bool +ProxyDatabase::Visit(const DatabaseSelection &selection, + VisitDirectory visit_directory, + VisitSong visit_song, + VisitPlaylist visit_playlist, + Error &error) const +{ + // TODO: eliminate the const_cast + if (!const_cast<ProxyDatabase *>(this)->EnsureConnected(error)) + return nullptr; + + if (!visit_directory && !visit_playlist && selection.recursive) + /* this optimized code path can only be used under + certain conditions */ + return ::SearchSongs(connection, selection, visit_song, error); + + /* fall back to recursive walk (slow!) */ + return ::Visit(connection, selection.uri.c_str(), + selection.recursive, selection.filter, + visit_directory, visit_song, visit_playlist, + error); +} + +bool +ProxyDatabase::VisitUniqueTags(const DatabaseSelection &selection, + TagType tag_type, + VisitString visit_string, + Error &error) const +{ + // TODO: eliminate the const_cast + if (!const_cast<ProxyDatabase *>(this)->EnsureConnected(error)) + return nullptr; + + enum mpd_tag_type tag_type2 = Convert(tag_type); + if (tag_type2 == MPD_TAG_COUNT) { + error.Set(libmpdclient_domain, "Unsupported tag"); + return false; + } + + if (!mpd_search_db_tags(connection, tag_type2)) + return CheckError(connection, error); + + if (!SendConstraints(connection, selection)) + return CheckError(connection, error); + + if (!mpd_search_commit(connection)) + return CheckError(connection, error); + + bool result = true; + + struct mpd_pair *pair; + while (result && + (pair = mpd_recv_pair_tag(connection, tag_type2)) != nullptr) { + result = visit_string(pair->value, error); + mpd_return_pair(connection, pair); + } + + return mpd_response_finish(connection) && + CheckError(connection, error) && + result; +} + +bool +ProxyDatabase::GetStats(const DatabaseSelection &selection, + DatabaseStats &stats, Error &error) const +{ + // TODO: match + (void)selection; + + // TODO: eliminate the const_cast + if (!const_cast<ProxyDatabase *>(this)->EnsureConnected(error)) + return nullptr; + + struct mpd_stats *stats2 = + mpd_run_stats(connection); + if (stats2 == nullptr) + return CheckError(connection, error); + + update_stamp = (time_t)mpd_stats_get_db_update_time(stats2); + + stats.song_count = mpd_stats_get_number_of_songs(stats2); + stats.total_duration = mpd_stats_get_db_play_time(stats2); + stats.artist_count = mpd_stats_get_number_of_artists(stats2); + stats.album_count = mpd_stats_get_number_of_albums(stats2); + mpd_stats_free(stats2); + + return true; +} + +const DatabasePlugin proxy_db_plugin = { + "proxy", + ProxyDatabase::Create, +}; diff --git a/src/db/plugins/ProxyDatabasePlugin.hxx b/src/db/plugins/ProxyDatabasePlugin.hxx new file mode 100644 index 000000000..699d374b5 --- /dev/null +++ b/src/db/plugins/ProxyDatabasePlugin.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_PROXY_DATABASE_PLUGIN_HXX +#define MPD_PROXY_DATABASE_PLUGIN_HXX + +struct DatabasePlugin; + +extern const DatabasePlugin proxy_db_plugin; + +#endif diff --git a/src/db/plugins/SimpleDatabasePlugin.cxx b/src/db/plugins/SimpleDatabasePlugin.cxx new file mode 100644 index 000000000..55e08b6d7 --- /dev/null +++ b/src/db/plugins/SimpleDatabasePlugin.cxx @@ -0,0 +1,336 @@ +/* + * 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 "db/Selection.hxx" +#include "db/Helpers.hxx" +#include "db/LightDirectory.hxx" +#include "db/Directory.hxx" +#include "db/Song.hxx" +#include "SongFilter.hxx" +#include "db/DatabaseSave.hxx" +#include "db/DatabaseLock.hxx" +#include "db/DatabaseError.hxx" +#include "fs/TextFile.hxx" +#include "config/ConfigData.hxx" +#include "fs/FileSystem.hxx" +#include "util/Error.hxx" +#include "util/Domain.hxx" +#include "Log.hxx" + +#include <errno.h> + +static constexpr Domain simple_db_domain("simple_db"); + +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(); + + 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); + 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)) { + delete root; + + 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); + + delete root; +} + +const LightSong * +SimpleDatabase::GetSong(const char *uri, Error &error) const +{ + assert(root != nullptr); + assert(borrowed_song_count == 0); + + db_lock(); + const Song *song = root->LookupSong(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 == &light_song); + +#ifndef NDEBUG + assert(borrowed_song_count > 0); + --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) { + 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; + } + + if (selection.recursive && visit_directory && + !visit_directory(directory->Export(), 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/plugins/SimpleDatabasePlugin.hxx b/src/db/plugins/SimpleDatabasePlugin.hxx new file mode 100644 index 000000000..83434393c --- /dev/null +++ b/src/db/plugins/SimpleDatabasePlugin.hxx @@ -0,0 +1,113 @@ +/* + * 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_SIMPLE_DATABASE_PLUGIN_HXX +#define MPD_SIMPLE_DATABASE_PLUGIN_HXX + +#include "db/DatabasePlugin.hxx" +#include "fs/AllocatedPath.hxx" +#include "db/LightSong.hxx" +#include "Compiler.h" + +#include <cassert> + +struct Directory; + +class SimpleDatabase : public Database { + AllocatedPath path; + std::string path_utf8; + + Directory *root; + + time_t mtime; + + /** + * A buffer for GetSong(). + */ + mutable LightSong light_song; + +#ifndef NDEBUG + mutable unsigned borrowed_song_count; +#endif + + SimpleDatabase() + :path(AllocatedPath::Null()) {} + +public: + gcc_pure + Directory *GetRoot() { + assert(root != NULL); + + return root; + } + + bool Save(Error &error); + + /** + * Returns true if there is a valid database file on the disk. + */ + bool FileExists() const { + return mtime > 0; + } + + 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, + VisitString visit_string, + Error &error) const override; + + virtual bool GetStats(const DatabaseSelection &selection, + DatabaseStats &stats, + Error &error) const override; + + virtual time_t GetUpdateStamp() const override { + return mtime; + } + +protected: + bool Configure(const config_param ¶m, Error &error); + + gcc_pure + bool Check(Error &error) const; + + bool Load(Error &error); + + gcc_pure + const Directory *LookupDirectory(const char *uri) const; +}; + +extern const DatabasePlugin simple_db_plugin; + +#endif diff --git a/src/db/plugins/UpnpDatabasePlugin.cxx b/src/db/plugins/UpnpDatabasePlugin.cxx new file mode 100644 index 000000000..c921d5460 --- /dev/null +++ b/src/db/plugins/UpnpDatabasePlugin.cxx @@ -0,0 +1,776 @@ +/* + * 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 "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 "upnp/Directory.hxx" +#include "upnp/Tags.hxx" +#include "db/DatabasePlugin.hxx" +#include "db/Selection.hxx" +#include "db/DatabaseError.hxx" +#include "db/LightDirectory.hxx" +#include "db/LightSong.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: + 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, + VisitString visit_string, + 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, + VisitString visit_string, + Error &error) const +{ + if (!visit_string) + 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) + if (!visit_string(value.c_str(), 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", + UpnpDatabase::Create, +}; diff --git a/src/db/plugins/UpnpDatabasePlugin.hxx b/src/db/plugins/UpnpDatabasePlugin.hxx new file mode 100644 index 000000000..0228405cd --- /dev/null +++ b/src/db/plugins/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/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/update/Archive.cxx b/src/db/update/Archive.cxx new file mode 100644 index 000000000..940448921 --- /dev/null +++ b/src/db/update/Archive.cxx @@ -0,0 +1,168 @@ +/* + * 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/Directory.hxx" +#include "db/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 archive_plugin &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.c_str(), 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 struct archive_plugin *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..0a3f7f2f8 --- /dev/null +++ b/src/db/update/Container.cxx @@ -0,0 +1,131 @@ +/* + * 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/Directory.hxx" +#include "db/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> + +#include <glib.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->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.c_str(), ++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.c_str(), + 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); + g_free(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..c8f58931f --- /dev/null +++ b/src/db/update/Editor.cxx @@ -0,0 +1,120 @@ +/* + * 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/Directory.hxx" +#include "db/Song.hxx" +#include "db/DatabaseLock.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 *child, *n; + directory_for_each_child_safe(child, n, directory) + DeleteDirectory(child); + + Song *song, *ns; + directory_for_each_song_safe(song, ns, directory) { + 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..7b691b36b --- /dev/null +++ b/src/db/update/ExcludeList.cxx @@ -0,0 +1,83 @@ + +/* + * 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/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) +{ + 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 = g_strstrip(line); + if (*p != 0) + patterns.emplace_front(p); + } + + fclose(file); + + return true; +} + +bool +ExcludeList::Check(Path name_fs) const +{ + assert(!name_fs.IsNull()); + + /* XXX include full path name in check */ + + for (const auto &i : patterns) + if (i.Check(name_fs.c_str())) + return true; + + return false; +} diff --git a/src/db/update/ExcludeList.hxx b/src/db/update/ExcludeList.hxx new file mode 100644 index 000000000..8870664b0 --- /dev/null +++ b/src/db/update/ExcludeList.hxx @@ -0,0 +1,80 @@ +/* + * 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 "Compiler.h" + +#include <forward_list> + +#include <glib.h> + +class Path; + +class ExcludeList { + 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; + +public: + gcc_pure + bool IsEmpty() const { + return patterns.empty(); + } + + /** + * 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..c2783690e --- /dev/null +++ b/src/db/update/InotifySource.cxx @@ -0,0 +1,114 @@ +/* + * 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 <sys/inotify.h> +#include <unistd.h> +#include <errno.h> + +bool +InotifySource::OnSocketReady(gcc_unused unsigned flags) +{ + const auto dest = buffer.Write(); + if (dest.IsEmpty()) + FatalError("buffer full"); + + ssize_t nbytes = read(Get(), dest.data, dest.size); + if (nbytes < 0) + FatalSystemError("Failed to read from inotify"); + if (nbytes == 0) + FatalError("end of file from inotify"); + + buffer.Append(nbytes); + + while (true) { + const char *name; + + auto range = buffer.Read(); + const struct inotify_event *event = + (const struct inotify_event *) + range.data; + if (range.size < sizeof(*event) || + range.size < sizeof(*event) + event->len) + break; + + if (event->len > 0 && event->name[event->len - 1] == 0) + name = event->name; + else + name = nullptr; + + callback(event->wd, event->mask, name, callback_ctx); + buffer.Consume(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..77c11093c --- /dev/null +++ b/src/db/update/InotifySource.hxx @@ -0,0 +1,74 @@ +/* + * 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" +#include "util/FifoBuffer.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; + + FifoBuffer<uint8_t, 4096> buffer; + + 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..3ba92ebf0 --- /dev/null +++ b/src/db/update/InotifyUpdate.cxx @@ -0,0 +1,338 @@ +/* + * 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 "Mapper.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; +}; + +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; + }); +} + +static AllocatedPath +watch_directory_get_uri_fs(const WatchDirectory *directory) +{ + if (directory->parent == nullptr) + return AllocatedPath::Null(); + + const auto uri = watch_directory_get_uri_fs(directory->parent); + if (uri.IsNull()) + return directory->name; + + return AllocatedPath::Build(uri, directory->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 +static unsigned +watch_directory_depth(const WatchDirectory *d) +{ + assert(d != nullptr); + + 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 = watch_directory_get_uri_fs(directory); + + 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 = mapper_get_music_directory_fs(); + + const auto path_fs = uri_fs.IsNull() + ? root + : AllocatedPath::Build(root, uri_fs.c_str()); + + recursive_watch_subdirectories(directory, path_fs, + watch_directory_depth(directory)); + } + + if ((mask & (IN_CLOSE_WRITE|IN_MOVE|IN_DELETE)) != 0 || + /* at the maximum depth, we watch out for newly created + directories */ + (watch_directory_depth(directory) == 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, UpdateService &update, unsigned max_depth) +{ + LogDebug(inotify_domain, "initializing inotify"); + + const auto &path = mapper_get_music_directory_fs(); + 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..0260a4ff5 --- /dev/null +++ b/src/db/update/InotifyUpdate.hxx @@ -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. + */ + +#ifndef MPD_INOTIFY_UPDATE_HXX +#define MPD_INOTIFY_UPDATE_HXX + +#include "check.h" +#include "Compiler.h" + +class EventLoop; +class UpdateService; + +#ifdef HAVE_INOTIFY_INIT + +void +mpd_inotify_init(EventLoop &loop, UpdateService &update, unsigned max_depth); + +void +mpd_inotify_finish(void); + +#else /* !HAVE_INOTIFY_INIT */ + +static inline void +mpd_inotify_init(gcc_unused EventLoop &loop, + gcc_unused UpdateService &update, + gcc_unused unsigned max_depth) +{ +} + +static inline void +mpd_inotify_finish(void) +{ +} + +#endif /* !HAVE_INOTIFY_INIT */ + +#endif diff --git a/src/db/update/Queue.cxx b/src/db/update/Queue.cxx new file mode 100644 index 000000000..4bb0ae725 --- /dev/null +++ b/src/db/update/Queue.cxx @@ -0,0 +1,42 @@ +/* + * 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(const char *path, bool discard, unsigned id) +{ + if (update_queue.size() >= MAX_UPDATE_QUEUE_SIZE) + return false; + + update_queue.emplace(path, discard, id); + return true; +} + +UpdateQueueItem +UpdateQueue::Pop() +{ + if (update_queue.empty()) + return UpdateQueueItem(); + + auto i = std::move(update_queue.front()); + update_queue.pop(); + return i; +} diff --git a/src/db/update/Queue.hxx b/src/db/update/Queue.hxx new file mode 100644 index 000000000..a5b2aa9ac --- /dev/null +++ b/src/db/update/Queue.hxx @@ -0,0 +1,55 @@ +/* + * 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 <string> +#include <queue> +#include <list> + +struct UpdateQueueItem { + std::string path_utf8; + unsigned id; + bool discard; + + UpdateQueueItem():id(0) {} + UpdateQueueItem(const char *_path, bool _discard, + unsigned _id) + :path_utf8(_path), id(_id), discard(_discard) {} + + bool IsDefined() const { + return id != 0; + } +}; + +class UpdateQueue { + static constexpr unsigned MAX_UPDATE_QUEUE_SIZE = 32; + + std::queue<UpdateQueueItem, std::list<UpdateQueueItem>> update_queue; + +public: + bool Push(const char *path, bool discard, unsigned id); + + UpdateQueueItem Pop(); +}; + +#endif diff --git a/src/db/update/Remove.cxx b/src/db/update/Remove.cxx new file mode 100644 index 000000000..102347905 --- /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/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..cc2a86968 --- /dev/null +++ b/src/db/update/Service.cxx @@ -0,0 +1,21 @@ +/* + * 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" diff --git a/src/db/update/Service.hxx b/src/db/update/Service.hxx new file mode 100644 index 000000000..936c2bb55 --- /dev/null +++ b/src/db/update/Service.hxx @@ -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. + */ + +#ifndef MPD_UPDATE_SERVICE_HXX +#define MPD_UPDATE_SERVICE_HXX + +#include "check.h" +#include "Queue.hxx" +#include "Walk.hxx" +#include "event/DeferredMonitor.hxx" +#include "thread/Thread.hxx" + +class SimpleDatabase; +class DatabaseListener; + +/** + * 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; + + 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, + Storage &_storage, + DatabaseListener &_listener); + + /** + * 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); + +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/UpdateGlue.cxx b/src/db/update/UpdateGlue.cxx new file mode 100644 index 000000000..c1d563ffd --- /dev/null +++ b/src/db/update/UpdateGlue.cxx @@ -0,0 +1,161 @@ +/* + * 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 "UpdateDomain.hxx" +#include "db/DatabaseListener.hxx" +#include "db/plugins/SimpleDatabasePlugin.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> + +inline void +UpdateService::Task() +{ + if (!next.path_utf8.empty()) + FormatDebug(update_domain, "starting: %s", + next.path_utf8.c_str()); + else + LogDebug(update_domain, "starting"); + + SetThreadIdlePriority(); + + modified = walk.Walk(*db.GetRoot(), next.path_utf8.c_str(), + next.discard); + + if (modified || !db.FileExists()) { + Error error; + if (!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()); + + progress = UPDATE_PROGRESS_RUNNING; + modified = false; + + next = std::move(i); + + 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()); + + if (progress != UPDATE_PROGRESS_IDLE) { + const unsigned id = GenerateId(); + if (!queue.Push(path, discard, id)) + return 0; + + update_task_id = id; + return id; + } + + const unsigned id = update_task_id = GenerateId(); + StartThread(UpdateQueueItem(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()); + + update_thread.Join(); + 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; + } +} + +UpdateService::UpdateService(EventLoop &_loop, SimpleDatabase &_db, + Storage &_storage, + DatabaseListener &_listener) + :DeferredMonitor(_loop), db(_db), listener(_listener), + progress(UPDATE_PROGRESS_IDLE), + update_task_id(0), + walk(_loop, _listener, _storage) +{ +} diff --git a/src/db/update/UpdateIO.cxx b/src/db/update/UpdateIO.cxx new file mode 100644 index 000000000..73295cb02 --- /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/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..804aea952 --- /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 "Service.hxx" +#include "UpdateIO.hxx" +#include "UpdateDomain.hxx" +#include "db/DatabaseLock.hxx" +#include "db/Directory.hxx" +#include "db/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..0ea1eb450 --- /dev/null +++ b/src/db/update/Walk.cxx @@ -0,0 +1,474 @@ +/* + * 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/Directory.hxx" +#include "db/Song.hxx" +#include "db/PlaylistVector.hxx" +#include "db/Uri.hxx" +#include "storage/StorageInterface.hxx" +#include "playlist/PlaylistRegistry.hxx" +#include "Mapper.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 "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) + :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; + dir.have_stat = true; +} + +inline void +UpdateWalk::RemoveExcludedFromDirectory(Directory &directory, + const ExcludeList &exclude_list) +{ + db_lock(); + + Directory *child, *n; + directory_for_each_child_safe(child, n, directory) { + const auto name_fs = AllocatedPath::FromUTF8(child->GetName()); + + if (name_fs.IsNull() || exclude_list.Check(name_fs)) { + editor.DeleteDirectory(child); + modified = true; + } + } + + Song *song, *ns; + directory_for_each_song_safe(song, ns, directory) { + 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 *child, *n; + directory_for_each_child_safe(child, n, directory) { + if (DirectoryExists(storage, *child)) + continue; + + editor.LockDeleteDirectory(child); + + modified = true; + } + + Song *song, *ns; + directory_for_each_song_safe(song, ns, directory) { + 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 + +static int +find_inode_ancestor(Storage &storage, Directory *parent, + unsigned inode, unsigned device) +{ +#ifndef WIN32 + while (parent) { + if (!parent->have_stat && + !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 (find_inode_ancestor(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 char *relative = map_to_relative_path(target_str); + return relative > target_str + ? !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 ((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) + return directory; + + FileInfo info; + if (!GetInfo(storage, uri_utf8, info) || + find_inode_ancestor(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..2bd56b067 --- /dev/null +++ b/src/db/update/Walk.hxx @@ -0,0 +1,141 @@ +/* + * 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 archive_plugin; +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; + + Storage &storage; + + DatabaseEditor editor; + +public: + UpdateWalk(EventLoop &_loop, DatabaseListener &_listener, + Storage &_storage); + + /** + * 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 archive_plugin &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 |