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-rw-r--r--src/queue/QueueSave.cxx126
1 files changed, 126 insertions, 0 deletions
diff --git a/src/queue/QueueSave.cxx b/src/queue/QueueSave.cxx
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+++ b/src/queue/QueueSave.cxx
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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.
+ */
+
+#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;
+}