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/*
* Copyright (C) 2003-2015 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 "UniqueTags.hxx"
#include "Interface.hxx"
#include "LightSong.hxx"
#include "tag/Set.hxx"
#include <functional>
#include <assert.h>
static bool
CollectTags(TagSet &set, TagType tag_type, tag_mask_t group_mask,
const LightSong &song)
{
assert(song.tag != nullptr);
const Tag &tag = *song.tag;
set.InsertUnique(tag, tag_type, group_mask);
return true;
}
bool
VisitUniqueTags(const Database &db, const DatabaseSelection &selection,
TagType tag_type, tag_mask_t group_mask,
VisitTag visit_tag,
Error &error)
{
TagSet set;
using namespace std::placeholders;
const auto f = std::bind(CollectTags, std::ref(set),
tag_type, group_mask, _1);
if (!db.Visit(selection, f, error))
return false;
for (const auto &value : set)
if (!visit_tag(value, error))
return false;
return true;
}
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