106 lines
2.4 KiB
C++
106 lines
2.4 KiB
C++
// SPDX-License-Identifier: GPL-2.0-or-later
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// Copyright The Music Player Daemon Project
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#include "Save.hxx"
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#include "Queue.hxx"
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#include "PlaylistError.hxx"
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#include "song/DetachedSong.hxx"
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#include "SongSave.hxx"
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#include "playlist/PlaylistSong.hxx"
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#include "io/LineReader.hxx"
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#include "io/BufferedOutputStream.hxx"
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#include "util/StringCompare.hxx"
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#include "Log.hxx"
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#include <fmt/format.h>
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#include <exception>
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#include <stdlib.h>
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#define PRIO_LABEL "Prio: "
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static void
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queue_save_database_song(BufferedOutputStream &os,
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int idx, const DetachedSong &song)
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{
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os.Fmt(FMT_STRING("{}:{}\n"), idx, song.GetURI());
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}
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static void
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queue_save_full_song(BufferedOutputStream &os, const DetachedSong &song)
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{
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song_save(os, song);
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}
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static void
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queue_save_song(BufferedOutputStream &os, int idx, const DetachedSong &song)
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{
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if (song.IsInDatabase() &&
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song.GetStartTime().IsZero() && song.GetEndTime().IsZero())
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/* use the brief format (just the URI) for "full"
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database songs */
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queue_save_database_song(os, idx, song);
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else
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/* use the long format (URI, range, tags) for the
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rest, so all metadata survives a MPD restart */
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queue_save_full_song(os, song);
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}
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void
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queue_save(BufferedOutputStream &os, const Queue &queue)
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{
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for (unsigned i = 0; i < queue.GetLength(); i++) {
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uint8_t prio = queue.GetPriorityAtPosition(i);
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if (prio != 0)
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os.Fmt(FMT_STRING(PRIO_LABEL "{}\n"), prio);
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queue_save_song(os, i, queue.Get(i));
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}
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}
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static DetachedSong
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LoadQueueSong(LineReader &file, const char *line)
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{
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std::unique_ptr<DetachedSong> song;
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if (const char *p = StringAfterPrefix(line, SONG_BEGIN)) {
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const char *uri = p;
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return song_load(file, uri);
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} else {
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char *endptr;
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long ret = strtol(line, &endptr, 10);
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if (ret < 0 || *endptr != ':' || endptr[1] == 0)
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throw std::runtime_error("Malformed playlist line in state file");
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const char *uri = endptr + 1;
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return DetachedSong(uri);
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}
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}
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void
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queue_load_song(LineReader &file, const SongLoader &loader,
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const char *line, Queue &queue)
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{
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if (queue.IsFull())
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return;
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uint8_t priority = 0;
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const char *p;
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if ((p = StringAfterPrefix(line, PRIO_LABEL))) {
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priority = strtoul(p, nullptr, 10);
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line = file.ReadLine();
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if (line == nullptr)
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return;
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}
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auto song = LoadQueueSong(file, line);
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if (!playlist_check_translate_song(song, {}, loader))
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return;
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queue.Append(std::move(song), priority);
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}
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