1 files changed, 126 insertions, 0 deletions
diff --git a/src/queue/QueueSave.cxx b/src/queue/QueueSave.cxx
new file mode 100644
index 000000000..6d871ac19
--- /dev/null
+++ b/src/queue/QueueSave.cxx
@@ -0,0 +1,126 @@
+/*
+ * 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 "QueueSave.hxx"
+#include "Queue.hxx"
+#include "PlaylistError.hxx"
+#include "DetachedSong.hxx"
+#include "SongSave.hxx"
+#include "SongLoader.hxx"
+#include "playlist/PlaylistSong.hxx"
+#include "fs/io/TextFile.hxx"
+#include "fs/io/BufferedOutputStream.hxx"
+#include "util/StringUtil.hxx"
+#include "util/Error.hxx"
+#include "fs/Traits.hxx"
+#include "Log.hxx"
+
+#include <stdlib.h>
+
+#define PRIO_LABEL "Prio: "
+
+static void
+queue_save_database_song(BufferedOutputStream &os,
+			 int idx, const DetachedSong &song)
+{
+	os.Format("%i:%s\n", idx, song.GetURI());
+}
+
+static void
+queue_save_full_song(BufferedOutputStream &os, const DetachedSong &song)
+{
+	song_save(os, song);
+}
+
+static void
+queue_save_song(BufferedOutputStream &os, int idx, const DetachedSong &song)
+{
+	if (song.IsInDatabase() &&
+	    song.GetStartMS() == 0 && song.GetEndMS() == 0)
+		/* use the brief format (just the URI) for "full"
+		   database songs */
+		queue_save_database_song(os, idx, song);
+	else
+		/* use the long format (URI, range, tags) for the
+		   rest, so all metadata survives a MPD restart */
+		queue_save_full_song(os, song);
+}
+
+void
+queue_save(BufferedOutputStream &os, const Queue &queue)
+{
+	for (unsigned i = 0; i < queue.GetLength(); i++) {
+		uint8_t prio = queue.GetPriorityAtPosition(i);
+		if (prio != 0)
+			os.Format(PRIO_LABEL "%u\n", prio);
+
+		queue_save_song(os, i, queue.Get(i));
+	}
+}
+
+void
+queue_load_song(TextFile &file, const SongLoader &loader,
+		const char *line, Queue &queue)
+{
+	if (queue.IsFull())
+		return;
+
+	uint8_t priority = 0;
+	if (StringStartsWith(line, PRIO_LABEL)) {
+		priority = strtoul(line + sizeof(PRIO_LABEL) - 1, nullptr, 10);
+
+		line = file.ReadLine();
+		if (line == nullptr)
+			return;
+	}
+
+	DetachedSong *song;
+
+	if (StringStartsWith(line, SONG_BEGIN)) {
+		const char *uri = line + sizeof(SONG_BEGIN) - 1;
+
+		Error error;
+		song = song_load(file, uri, error);
+		if (song == nullptr) {
+			LogError(error);
+			return;
+		}
+	} else {
+		char *endptr;
+		long ret = strtol(line, &endptr, 10);
+		if (ret < 0 || *endptr != ':' || endptr[1] == 0) {
+			LogError(playlist_domain,
+				 "Malformed playlist line in state file");
+			return;
+		}
+
+		const char *uri = endptr + 1;
+
+		song = new DetachedSong(uri);
+	}
+
+	if (!playlist_check_translate_song(*song, nullptr, loader)) {
+		delete song;
+		return;
+	}
+
+	queue.Append(std::move(*song), priority);
+	delete song;
+}