2009-03-13 18:43:16 +01:00
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/*
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2016-02-26 17:54:05 +01:00
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* Copyright 2003-2016 The Music Player Daemon Project
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2009-03-13 18:43:16 +01:00
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* http://www.musicpd.org
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2006-07-31 01:32:47 +02:00
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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2009-03-13 18:43:16 +01:00
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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2006-07-31 01:32:47 +02:00
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*/
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2009-11-12 09:12:38 +01:00
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#include "config.h"
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2013-01-02 19:52:57 +01:00
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#include "StateFile.hxx"
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2014-01-23 23:49:50 +01:00
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#include "output/OutputState.hxx"
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2014-02-27 17:12:42 +01:00
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#include "queue/PlaylistState.hxx"
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2014-08-07 18:35:57 +02:00
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#include "fs/io/TextFile.hxx"
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#include "fs/io/FileOutputStream.hxx"
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#include "fs/io/BufferedOutputStream.hxx"
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2013-01-04 22:42:05 +01:00
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#include "Partition.hxx"
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2014-02-01 00:26:34 +01:00
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#include "Instance.hxx"
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2014-01-24 16:25:21 +01:00
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#include "mixer/Volume.hxx"
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2014-02-03 22:25:54 +01:00
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#include "SongLoader.hxx"
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2013-09-27 22:31:24 +02:00
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#include "util/Domain.hxx"
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#include "Log.hxx"
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2013-10-02 08:11:58 +02:00
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2015-12-15 22:26:26 +01:00
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#include <exception>
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2008-10-08 10:49:29 +02:00
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#include <string.h>
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2006-07-31 01:32:47 +02:00
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2013-09-27 22:31:24 +02:00
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static constexpr Domain state_file_domain("state_file");
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2008-12-29 17:29:23 +01:00
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2016-12-27 23:06:34 +01:00
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constexpr std::chrono::steady_clock::duration StateFile::DEFAULT_INTERVAL;
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StateFile::StateFile(AllocatedPath &&_path,
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std::chrono::steady_clock::duration _interval,
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2013-08-07 19:54:38 +02:00
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Partition &_partition, EventLoop &_loop)
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:TimeoutMonitor(_loop),
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path(std::move(_path)), path_utf8(path.ToUTF8()),
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2014-08-24 12:59:45 +02:00
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interval(_interval),
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2016-12-27 23:13:03 +01:00
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partition(_partition)
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2006-07-31 01:32:47 +02:00
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{
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2013-01-14 11:00:22 +01:00
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}
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2009-01-18 18:09:50 +01:00
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2013-04-08 22:34:44 +02:00
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void
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StateFile::RememberVersions()
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{
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prev_volume_version = sw_volume_state_get_hash();
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prev_output_version = audio_output_state_get_version();
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2013-10-19 18:48:38 +02:00
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prev_playlist_version = playlist_state_get_hash(partition.playlist,
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partition.pc);
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2013-04-08 22:34:44 +02:00
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}
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bool
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StateFile::IsModified() const
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{
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return prev_volume_version != sw_volume_state_get_hash() ||
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prev_output_version != audio_output_state_get_version() ||
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2013-10-19 18:48:38 +02:00
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prev_playlist_version != playlist_state_get_hash(partition.playlist,
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partition.pc);
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2013-04-08 22:34:44 +02:00
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}
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2014-07-30 20:58:14 +02:00
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inline void
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StateFile::Write(BufferedOutputStream &os)
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{
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save_sw_volume_state(os);
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audio_output_state_save(os, partition.outputs);
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playlist_state_save(os, partition.playlist, partition.pc);
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}
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2015-12-16 10:24:43 +01:00
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inline void
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StateFile::Write(OutputStream &os)
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2014-07-30 20:58:14 +02:00
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{
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BufferedOutputStream bos(os);
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Write(bos);
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2015-12-16 10:24:43 +01:00
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bos.Flush();
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2014-07-30 20:58:14 +02:00
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}
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2013-01-14 11:00:22 +01:00
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void
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StateFile::Write()
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{
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2013-09-27 22:31:24 +02:00
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FormatDebug(state_file_domain,
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"Saving state file %s", path_utf8.c_str());
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2009-07-15 14:29:30 +02:00
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2015-12-15 22:26:26 +01:00
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try {
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FileOutputStream fos(path);
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2015-12-16 10:24:43 +01:00
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Write(fos);
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2015-12-16 00:24:41 +01:00
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fos.Commit();
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2015-12-15 22:26:26 +01:00
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} catch (const std::exception &e) {
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LogError(e);
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2006-07-31 01:32:47 +02:00
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}
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2013-04-08 22:34:44 +02:00
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RememberVersions();
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2006-07-31 01:32:47 +02:00
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}
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2013-01-14 11:00:22 +01:00
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void
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StateFile::Read()
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2015-12-16 11:05:33 +01:00
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try {
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2009-07-15 16:57:37 +02:00
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bool success;
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2006-07-31 01:32:47 +02:00
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2013-09-27 22:31:24 +02:00
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FormatDebug(state_file_domain, "Loading state file %s", path_utf8.c_str());
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2006-07-31 01:32:47 +02:00
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2015-12-16 11:05:33 +01:00
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TextFile file(path);
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2009-07-14 21:15:12 +02:00
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2014-02-01 00:26:34 +01:00
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#ifdef ENABLE_DATABASE
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2014-02-07 00:29:07 +01:00
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const SongLoader song_loader(partition.instance.database,
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partition.instance.storage);
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2014-02-01 00:26:34 +01:00
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#else
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2014-02-07 00:29:07 +01:00
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const SongLoader song_loader(nullptr, nullptr);
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2014-02-01 00:26:34 +01:00
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#endif
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2014-02-03 22:25:54 +01:00
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2010-07-25 11:01:05 +02:00
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const char *line;
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2014-07-30 18:45:14 +02:00
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while ((line = file.ReadLine()) != nullptr) {
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2014-01-27 08:20:25 +01:00
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success = read_sw_volume_state(line, partition.outputs) ||
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audio_output_state_read(line, partition.outputs) ||
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2014-02-03 22:25:54 +01:00
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playlist_state_restore(line, file, song_loader,
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partition.playlist,
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2013-10-19 18:48:38 +02:00
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partition.pc);
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2009-07-15 16:57:37 +02:00
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if (!success)
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2013-09-27 22:31:24 +02:00
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FormatError(state_file_domain,
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"Unrecognized line in state file: %s",
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line);
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2009-07-15 16:57:37 +02:00
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}
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2006-07-31 01:32:47 +02:00
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2013-04-08 22:34:44 +02:00
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RememberVersions();
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2015-12-16 11:05:33 +01:00
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} catch (const std::exception &e) {
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LogError(e);
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2006-07-31 01:32:47 +02:00
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}
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2009-01-18 18:09:50 +01:00
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2013-04-08 22:31:51 +02:00
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void
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StateFile::CheckModified()
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2009-01-18 18:10:15 +01:00
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{
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2013-04-08 22:31:51 +02:00
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if (!IsActive() && IsModified())
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2016-12-27 23:06:34 +01:00
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Schedule(interval);
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2009-01-18 18:09:50 +01:00
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}
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2013-04-08 23:14:07 +02:00
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void
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2013-01-10 19:08:42 +01:00
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StateFile::OnTimeout()
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2009-01-18 18:09:50 +01:00
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{
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2013-04-08 22:31:51 +02:00
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Write();
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2009-01-18 18:09:50 +01:00
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}
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