core/playlists/library: Save playlist flags between sessions

Signed-off-by: Anna Schumaker <Anna@NoWheyCreamery.com>

core/playlists/library.c

@@ -13,7 +13,8 @@ struct scan_data {
 };
 
 static bool __lib_pl_scan_dir(void *);
-static struct queue_ops *lib_ops = NULL;
+static struct queue_ops *lib_ops  = NULL;
+static struct file       lib_file = FILE_INIT("playlist.library", 0, 0);
 
 
 static struct playlist *__lib_pl_alloc(struct library *library)
@@ -35,7 +36,7 @@ static void __lib_pl_free(struct playlist *playlist)
 	}
 }
 
-static bool __lib_pl_load(void *data)
+static bool __lib_pl_add(void *data)
 {
 	struct playlist *playlist = (struct playlist *)data;
 	struct library  *library  = library_lookup(playlist->pl_name);
@@ -57,6 +58,49 @@ static struct playlist *__lib_pl_lookup(const gchar *name)
 	return library ? library->li_playlist : NULL;
 }
 
+static void __lib_pl_save(void)
+{
+	struct db_entry *dbe, *next;
+	struct playlist *playlist;
+
+	if (!file_open(&lib_file, OPEN_WRITE))
+		return;
+
+	file_writef(&lib_file, "%u\n", library_db_get()->db_size);
+	db_for_each(dbe, next, library_db_get()) {
+		playlist = LIBRARY(dbe)->li_playlist;
+		file_writef(&lib_file, "%s\n", playlist->pl_name);
+		queue_save_flags(&playlist->pl_queue, &lib_file, true);
+	}
+
+	file_close(&lib_file);
+}
+
+static bool __lib_pl_load(void *data)
+{
+	struct playlist *playlist;
+	unsigned int i, n;
+	gchar *name;
+
+	if (!file_open(&lib_file, OPEN_READ))
+		return true;
+
+	file_readf(&lib_file, "%u\n", &n);
+	for (i = 0; i < n; i++) {
+		name     = file_readl(&lib_file);
+		playlist = __lib_pl_lookup(name);
+		if (!playlist)
+			continue;
+		queue_load_flags(&playlist->pl_queue, &lib_file, true);
+		queue_iter_set(&playlist->pl_queue, &playlist->pl_queue.q_cur,
+				playlist->pl_queue.q_cur.it_pos);
+		g_free(name);
+	}
+
+	file_close(&lib_file);
+	return true;
+}
+
 static void __lib_pl_scan_dir_idle(struct library *library, const gchar *path)
 {
 	struct scan_data *scan = g_malloc(sizeof(struct scan_data));
@@ -194,6 +238,7 @@ static bool pl_library_delete(const gchar *name)
 
 	track_remove_all(library);
 	library_remove(library);
+	__lib_pl_save();
 	return true;
 }
 
@@ -214,18 +259,22 @@ static void pl_library_set_flag(const gchar *name, enum queue_flags flag,
 {
 	struct playlist *playlist = __lib_pl_lookup(name);
 	playlist_generic_set_flag(playlist, flag, enabled);
+	__lib_pl_save();
 }
 
 static void pl_library_sort(const gchar *name, enum compare_t sort, bool reset)
 {
 	struct playlist *playlist = __lib_pl_lookup(name);
 	playlist_generic_sort(playlist, sort, reset);
+	__lib_pl_save();
 }
 
 static struct track *pl_library_next(const gchar *name)
 {
 	struct playlist *playlist = __lib_pl_lookup(name);
-	return playlist_generic_next(playlist);
+	struct track    *track    = playlist_generic_next(playlist);
+	__lib_pl_save();
+	return track;
 }
 
 
@@ -254,7 +303,7 @@ static bool __lib_pl_init(void *data)
 		playlist = __lib_pl_alloc(LIBRARY(dbe));
 		LIBRARY(dbe)->li_playlist = playlist;
 
-		idle_schedule(IDLE_SYNC, __lib_pl_load, playlist);
+		idle_schedule(IDLE_SYNC, __lib_pl_add, playlist);
 		pl_library_update(playlist->pl_name);
 	}
 
@@ -265,6 +314,7 @@ void pl_library_init(struct queue_ops *ops)
 {
 	lib_ops = ops;
 	idle_schedule(IDLE_SYNC, __lib_pl_init, NULL);
+	idle_schedule(IDLE_SYNC, __lib_pl_load, NULL);
 }
 
 void pl_library_deinit()