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Clementine-audio-player-Mac.../src/playlist/playlistbackend.cpp

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/* This file is part of Clementine.
Copyright 2010, David Sansome <me@davidsansome.com>
Clementine 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 3 of the License, or
(at your option) any later version.
Clementine 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 Clementine. If not, see <http://www.gnu.org/licenses/>.
*/
#include "playlistbackend.h"
#include "core/application.h"
#include "core/database.h"
#include "core/scopedtransaction.h"
#include "core/song.h"
#include "library/librarybackend.h"
#include "library/sqlrow.h"
#include "playlist/songplaylistitem.h"
#include "playlistparsers/cueparser.h"
#include "smartplaylists/generator.h"
#include <QFile>
#include <QHash>
#include <QMutexLocker>
#include <QSqlQuery>
#include <QtConcurrentMap>
#include <QtDebug>
#include <boost/bind.hpp>
using smart_playlists::GeneratorPtr;
using boost::shared_ptr;
const int PlaylistBackend::kSongTableJoins = 4;
PlaylistBackend::PlaylistBackend(Application* app, QObject* parent)
: QObject(parent),
app_(app),
db_(app_->database())
{
}
PlaylistBackend::PlaylistList PlaylistBackend::GetAllPlaylists() {
QMutexLocker l(db_->Mutex());
QSqlDatabase db(db_->Connect());
PlaylistList ret;
QSqlQuery q("SELECT ROWID, name, last_played, dynamic_playlist_type,"
" dynamic_playlist_data, dynamic_playlist_backend,"
" special_type"
" FROM playlists"
" ORDER BY ui_order", db);
q.exec();
if (db_->CheckErrors(q))
return ret;
while (q.next()) {
Playlist p;
p.id = q.value(0).toInt();
p.name = q.value(1).toString();
p.last_played = q.value(2).toInt();
p.dynamic_type = q.value(3).toString();
p.dynamic_data = q.value(4).toByteArray();
p.dynamic_backend = q.value(5).toString();
p.special_type = q.value(6).toString();
ret << p;
}
return ret;
}
PlaylistBackend::Playlist PlaylistBackend::GetPlaylist(int id) {
QMutexLocker l(db_->Mutex());
QSqlDatabase db(db_->Connect());
QSqlQuery q("SELECT ROWID, name, last_played, dynamic_playlist_type,"
" dynamic_playlist_data, dynamic_playlist_backend,"
" special_type"
" FROM playlists"
" WHERE ROWID=:id", db);
q.bindValue(":id", id);
q.exec();
if (db_->CheckErrors(q))
return Playlist();
q.next();
Playlist p;
p.id = q.value(0).toInt();
p.name = q.value(1).toString();
p.last_played = q.value(2).toInt();
p.dynamic_type = q.value(3).toString();
p.dynamic_data = q.value(4).toByteArray();
p.dynamic_backend = q.value(5).toString();
p.special_type = q.value(6).toString();
return p;
}
QFuture<PlaylistItemPtr> PlaylistBackend::GetPlaylistItems(int playlist) {
QMutexLocker l(db_->Mutex());
QSqlDatabase db(db_->Connect());
QString query = "SELECT songs.ROWID, " + Song::JoinSpec("songs") + ","
" magnatune_songs.ROWID, " + Song::JoinSpec("magnatune_songs") + ","
" jamendo_songs.ROWID, " + Song::JoinSpec("jamendo_songs") + ","
" p.ROWID, " + Song::JoinSpec("p") + ","
" p.type, p.radio_service"
" FROM playlist_items AS p"
" LEFT JOIN songs"
" ON p.library_id = songs.ROWID"
" LEFT JOIN magnatune_songs"
" ON p.library_id = magnatune_songs.ROWID"
" LEFT JOIN jamendo.songs AS jamendo_songs"
" ON p.library_id = jamendo_songs.ROWID"
" WHERE p.playlist = :playlist";
QSqlQuery q(query, db);
q.bindValue(":playlist", playlist);
q.exec();
if (db_->CheckErrors(q))
return QFuture<PlaylistItemPtr>();
QList<SqlRow> rows;
while (q.next()) {
rows << SqlRow(q);
}
// it's probable that we'll have a few songs associated with the
// same CUE so we're caching results of parsing CUEs
boost::shared_ptr<NewSongFromQueryState> state_ptr(new NewSongFromQueryState());
return QtConcurrent::mapped(rows, boost::bind(&PlaylistBackend::NewSongFromQuery, this, _1, state_ptr));
}
PlaylistItemPtr PlaylistBackend::NewSongFromQuery(const SqlRow& row, boost::shared_ptr<NewSongFromQueryState> state) {
// The song tables get joined first, plus one each for the song ROWIDs
const int playlist_row = (Song::kColumns.count() + 1) * kSongTableJoins;
PlaylistItemPtr item(PlaylistItem::NewFromType(row.value(playlist_row).toString()));
if (item) {
item->InitFromQuery(row);
return RestoreCueData(item, state);
} else {
return item;
}
}
// If song had a CUE and the CUE still exists, the metadata from it will
// be applied here.
PlaylistItemPtr PlaylistBackend::RestoreCueData(PlaylistItemPtr item, boost::shared_ptr<NewSongFromQueryState> state) {
// we need library to run a CueParser; also, this method applies only to
// file-type PlaylistItems
if(item->type() != "File") {
return item;
}
CueParser cue_parser(app_->library_backend());
Song song = item->Metadata();
// we're only interested in .cue songs here
if(!song.has_cue()) {
return item;
}
QString cue_path = song.cue_path();
// if .cue was deleted - reload the song
if(!QFile::exists(cue_path)) {
item->Reload();
return item;
}
SongList song_list;
{
QMutexLocker locker(&state->mutex_);
if(!state->cached_cues_.contains(cue_path)) {
QFile cue(cue_path);
cue.open(QIODevice::ReadOnly);
song_list = cue_parser.Load(&cue, cue_path, QDir(cue_path.section('/', 0, -2)));
state->cached_cues_[cue_path] = song_list;
} else {
song_list = state->cached_cues_[cue_path];
}
}
foreach(const Song& from_list, song_list) {
if(from_list.url() == song.url() &&
from_list.beginning_nanosec() == song.beginning_nanosec()) {
// we found a matching section; replace the input
// item with a new one containing CUE metadata
return PlaylistItemPtr(new SongPlaylistItem(from_list));
}
}
// there's no such section in the related .cue -> reload the song
item->Reload();
return item;
}
void PlaylistBackend::SavePlaylistAsync(int playlist, const PlaylistItemList &items,
int last_played, GeneratorPtr dynamic) {
metaObject()->invokeMethod(this, "SavePlaylist", Qt::QueuedConnection,
Q_ARG(int, playlist),
Q_ARG(PlaylistItemList, items),
Q_ARG(int, last_played),
Q_ARG(smart_playlists::GeneratorPtr, dynamic));
}
void PlaylistBackend::SavePlaylist(int playlist, const PlaylistItemList& items,
int last_played, GeneratorPtr dynamic) {
QMutexLocker l(db_->Mutex());
QSqlDatabase db(db_->Connect());
QSqlQuery clear("DELETE FROM playlist_items WHERE playlist = :playlist", db);
QSqlQuery insert("INSERT INTO playlist_items"
" (playlist, type, library_id, radio_service, " +
Song::kColumnSpec + ")"
" VALUES (:playlist, :type, :library_id, :radio_service, " +
Song::kBindSpec + ")", db);
QSqlQuery update("UPDATE playlists SET "
" last_played=:last_played,"
" dynamic_playlist_type=:dynamic_type,"
" dynamic_playlist_data=:dynamic_data,"
" dynamic_playlist_backend=:dynamic_backend"
" WHERE ROWID=:playlist", db);
ScopedTransaction transaction(&db);
// Clear the existing items in the playlist
clear.bindValue(":playlist", playlist);
clear.exec();
if (db_->CheckErrors(clear))
return;
// Save the new ones
foreach (PlaylistItemPtr item, items) {
insert.bindValue(":playlist", playlist);
item->BindToQuery(&insert);
insert.exec();
db_->CheckErrors(insert);
}
// Update the last played track number
update.bindValue(":last_played", last_played);
if (dynamic) {
update.bindValue(":dynamic_type", dynamic->type());
update.bindValue(":dynamic_data", dynamic->Save());
update.bindValue(":dynamic_backend", dynamic->library()->songs_table());
} else {
update.bindValue(":dynamic_type", QString());
update.bindValue(":dynamic_data", QByteArray());
update.bindValue(":dynamic_backend", QString());
}
update.bindValue(":playlist", playlist);
update.exec();
if (db_->CheckErrors(update))
return;
transaction.Commit();
}
int PlaylistBackend::CreatePlaylist(const QString &name,
const QString& special_type) {
QMutexLocker l(db_->Mutex());
QSqlDatabase db(db_->Connect());
QSqlQuery q("INSERT INTO playlists (name, special_type)"
" VALUES (:name, :special_type)", db);
q.bindValue(":name", name);
q.bindValue(":special_type", special_type);
q.exec();
if (db_->CheckErrors(q))
return -1;
return q.lastInsertId().toInt();
}
void PlaylistBackend::RemovePlaylist(int id) {
QMutexLocker l(db_->Mutex());
QSqlDatabase db(db_->Connect());
QSqlQuery delete_playlist("DELETE FROM playlists WHERE ROWID=:id", db);
QSqlQuery delete_items("DELETE FROM playlist_items WHERE playlist=:id", db);
delete_playlist.bindValue(":id", id);
delete_items.bindValue(":id", id);
ScopedTransaction transaction(&db);
delete_playlist.exec();
if (db_->CheckErrors(delete_playlist))
return;
delete_items.exec();
if (db_->CheckErrors(delete_items))
return;
transaction.Commit();
}
void PlaylistBackend::RenamePlaylist(int id, const QString &new_name) {
QMutexLocker l(db_->Mutex());
QSqlDatabase db(db_->Connect());
QSqlQuery q("UPDATE playlists SET name=:name WHERE ROWID=:id", db);
q.bindValue(":name", new_name);
q.bindValue(":id", id);
q.exec();
db_->CheckErrors(q);
}
void PlaylistBackend::SetPlaylistOrder(const QList<int>& ids) {
QMutexLocker l(db_->Mutex());
QSqlDatabase db(db_->Connect());
QSqlQuery q("UPDATE playlists SET ui_order=:index WHERE ROWID=:id", db);
ScopedTransaction transaction(&db);
for (int i=0 ; i<ids.count() ; ++i) {
q.bindValue(":index", i);
q.bindValue(":id", ids[i]);
q.exec();
if (db_->CheckErrors(q))
return;
}
transaction.Commit();
}
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