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/*
* Copyright 2003-2021 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 "QueueSave.hxx"
#include "Queue.hxx"
#include "PlaylistError.hxx"
#include "song/DetachedSong.hxx"
#include "SongSave.hxx"
#include "playlist/PlaylistSong.hxx"
#include "fs/io/TextFile.hxx"
#include "fs/io/BufferedOutputStream.hxx"
#include "util/StringCompare.hxx"
#include "Log.hxx"
#include <exception>
#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.GetStartTime().IsZero() && song.GetEndTime().IsZero())
/* 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));
}
}
static DetachedSong
LoadQueueSong(TextFile &file, const char *line)
{
std::unique_ptr<DetachedSong> song;
if (const char *p = StringAfterPrefix(line, SONG_BEGIN)) {
const char *uri = p;
return song_load(file, uri);
} else {
char *endptr;
long ret = strtol(line, &endptr, 10);
if (ret < 0 || *endptr != ':' || endptr[1] == 0)
throw std::runtime_error("Malformed playlist line in state file");
const char *uri = endptr + 1;
return DetachedSong(uri);
}
}
void
queue_load_song(TextFile &file, const SongLoader &loader,
const char *line, Queue &queue)
{
if (queue.IsFull())
return;
uint8_t priority = 0;
const char *p;
if ((p = StringAfterPrefix(line, PRIO_LABEL))) {
priority = strtoul(p, nullptr, 10);
line = file.ReadLine();
if (line == nullptr)
return;
}
auto song = LoadQueueSong(file, line);
if (!playlist_check_translate_song(song, {}, loader))
return;
queue.Append(std::move(song), priority);
}
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