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+/*
+ * 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/Interface.hxx"
+#include "fs/AllocatedPath.hxx"
+#include "db/LightSong.hxx"
+#include "Compiler.h"
+
+#include <cassert>
+
+struct config_param;
+struct Directory;
+struct DatabasePlugin;
+class EventLoop;
+class DatabaseListener;
+
+class 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();
+
+public:
+ static Database *Create(EventLoop &loop, DatabaseListener &listener,
+ const config_param &param,
+ Error &error);
+
+ 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;
+ }
+
+ /* virtual methods from class Database */
+ 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;
+ }
+
+private:
+ bool Configure(const config_param &param, Error &error);
+
+ gcc_pure
+ bool Check(Error &error) const;
+
+ bool Load(Error &error);
+};
+
+extern const DatabasePlugin simple_db_plugin;
+
+#endif