81 lines
2.1 KiB
C++
81 lines
2.1 KiB
C++
/*
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* Copyright (C) 2003-2013 The Music Player Daemon Project
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* http://www.musicpd.org
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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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*
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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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*/
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#include "config.h"
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#include "Playlist.hxx"
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#include "DatabaseGlue.hxx"
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#include "DatabasePlugin.hxx"
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#include "Song.hxx"
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#include "tag/Tag.hxx"
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#include "Idle.hxx"
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#include "util/Error.hxx"
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static bool
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UpdatePlaylistSong(const Database &db, Song &song)
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{
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if (!song.IsInDatabase() || !song.IsDetached())
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/* only update Songs instances that are "detached"
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from the Database */
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return false;
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Song *original = db.GetSong(song.uri, IgnoreError());
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if (original == nullptr)
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/* not found - shouldn't happen, because the update
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thread should ensure that all stale Song instances
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have been purged */
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return false;
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if (original->mtime == song.mtime) {
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/* not modified */
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db.ReturnSong(original);
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return false;
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}
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song.mtime = original->mtime;
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if (original->tag != nullptr)
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song.ReplaceTag(Tag(*original->tag));
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db.ReturnSong(original);
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return true;
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}
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void
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playlist::DatabaseModified()
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{
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const Database *db = GetDatabase();
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if (db == nullptr)
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/* how can this ever happen? */
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return;
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bool modified = false;
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for (unsigned i = 0, n = queue.GetLength(); i != n; ++i) {
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if (UpdatePlaylistSong(*db, queue.Get(i))) {
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queue.ModifyAtPosition(i);
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modified = true;
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}
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}
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if (modified) {
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queue.IncrementVersion();
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idle_add(IDLE_PLAYLIST);
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}
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}
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