87 lines
2.3 KiB
C++
87 lines
2.3 KiB
C++
/* This file is part of Clementine.
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Copyright 2010, David Sansome <me@davidsansome.com>
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Clementine 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 3 of the License, or
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(at your option) any later version.
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Clementine 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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You should have received a copy of the GNU General Public License
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along with Clementine. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "querygenerator.h"
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#include <QtDebug>
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#include "library/librarybackend.h"
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namespace smart_playlists {
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QueryGenerator::QueryGenerator() : dynamic_(false), current_pos_(0) {}
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QueryGenerator::QueryGenerator(const QString& name, const Search& search,
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bool dynamic)
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: search_(search), dynamic_(dynamic), current_pos_(0) {
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set_name(name);
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}
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void QueryGenerator::Load(const Search& search) {
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search_ = search;
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dynamic_ = false;
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current_pos_ = 0;
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}
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void QueryGenerator::Load(const QByteArray& data) {
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QDataStream s(data);
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s >> search_;
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s >> dynamic_;
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}
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QByteArray QueryGenerator::Save() const {
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QByteArray ret;
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QDataStream s(&ret, QIODevice::WriteOnly);
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s << search_;
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s << dynamic_;
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return ret;
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}
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PlaylistItemList QueryGenerator::Generate() {
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previous_ids_.clear();
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current_pos_ = 0;
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return GenerateMore(0);
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}
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PlaylistItemList QueryGenerator::GenerateMore(int count) {
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Search search_copy = search_;
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search_copy.id_not_in_ = previous_ids_;
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if (count) {
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search_copy.limit_ = count;
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}
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if (search_copy.sort_type_ != Search::Sort_Random) {
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search_copy.first_item_ = current_pos_;
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current_pos_ += search_copy.limit_;
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}
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SongList songs = backend_->FindSongs(search_copy);
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PlaylistItemList items;
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for (const Song& song : songs) {
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items << PlaylistItemPtr(
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PlaylistItem::NewFromSongsTable(backend_->songs_table(), song));
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previous_ids_ << song.id();
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if (previous_ids_.count() > GetDynamicFuture() + GetDynamicHistory())
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previous_ids_.removeFirst();
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}
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return items;
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}
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} // namespace smart_playlists
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