* Added DbCmd_PlaybackCharts - currently only supports artists, more to come.

src/libtomahawk/CMakeLists.txt

@@ -267,6 +267,7 @@ set( libSources
     database/DatabaseCommand_CollectionAttributes.cpp
     database/DatabaseCommand_TrackAttributes.cpp
     database/DatabaseCommand_SetTrackAttributes.cpp
+    database/DatabaseCommand_PlaybackCharts.cpp
     database/Database.cpp
     database/TomahawkSqlQuery.cpp
     database/IdThreadWorker.cpp

src/libtomahawk/database/DatabaseCommand_PlaybackCharts.cpp

@@ -0,0 +1,76 @@
+/* === This file is part of Tomahawk Player - <http://tomahawk-player.org> ===
+ *
+ *   Copyright 2010-2011, Christian Muehlhaeuser <muesli@tomahawk-player.org>
+ *
+ *   Tomahawk 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.
+ *
+ *   Tomahawk 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 Tomahawk. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "DatabaseCommand_PlaybackCharts.h"
+
+#include <QSqlQuery>
+
+#include "Artist.h"
+#include "DatabaseImpl.h"
+#include "Source.h"
+#include "utils/TomahawkUtils.h"
+#include "utils/Logger.h"
+
+
+DatabaseCommand_PlaybackCharts::DatabaseCommand_PlaybackCharts( const Tomahawk::source_ptr& source, QObject* parent )
+    : DatabaseCommand( parent )
+    , m_amount( 0 )
+{
+    setSource( source );
+}
+
+
+DatabaseCommand_PlaybackCharts::~DatabaseCommand_PlaybackCharts()
+{
+}
+
+
+void
+DatabaseCommand_PlaybackCharts::exec( DatabaseImpl* dbi )
+{
+    TomahawkSqlQuery query = dbi->newquery();
+    QString sourceToken;
+
+    if ( source() )
+        sourceToken = QString( "AND playback_log.source %1" ).arg( source()->isLocal() ? "IS NULL" : QString( "= %1" ).arg( source()->id() ) );
+
+    QString sql = QString(
+            "SELECT artist.id, artist.name, COUNT(*) AS counter "
+            "FROM playback_log, artist, track "
+            "WHERE playback_log.track = track.id "
+            "AND artist.id = track.artist "
+            "%1 "
+            "GROUP BY artist.id "
+            "ORDER BY counter DESC "
+            "%2"
+            ).arg( sourceToken )
+             .arg( m_amount > 0 ? QString( "LIMIT 0, %1" ).arg( m_amount ) : QString() );
+
+    query.prepare( sql );
+    query.exec();
+
+    QList<Tomahawk::artist_ptr> al;
+    while ( query.next() )
+    {
+        Tomahawk::artist_ptr artist = Tomahawk::Artist::get( query.value( 0 ).toUInt(), query.value( 1 ).toString() );
+        al << artist;
+    }
+
+    emit artists( al );
+    emit done();
+}

src/libtomahawk/database/DatabaseCommand_PlaybackCharts.h

@@ -0,0 +1,54 @@
+/* === This file is part of Tomahawk Player - <http://tomahawk-player.org> ===
+ *
+ *   Copyright 2010-2011, Christian Muehlhaeuser <muesli@tomahawk-player.org>
+ *
+ *   Tomahawk 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.
+ *
+ *   Tomahawk 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 Tomahawk. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef DATABASECOMMAND_PLAYBACKCHARTS_H
+#define DATABASECOMMAND_PLAYBACKCHARTS_H
+
+#include <QObject>
+#include <QVariantMap>
+
+#include "Artist.h"
+#include "Collection.h"
+#include "Typedefs.h"
+#include "DatabaseCommand.h"
+
+#include "DllMacro.h"
+
+class DLLEXPORT DatabaseCommand_PlaybackCharts : public DatabaseCommand
+{
+Q_OBJECT
+public:
+    explicit DatabaseCommand_PlaybackCharts( const Tomahawk::source_ptr& source, QObject* parent = 0 );
+    virtual ~DatabaseCommand_PlaybackCharts();
+
+    virtual void exec( DatabaseImpl* );
+
+    virtual bool doesMutates() const { return false; }
+    virtual QString commandname() const { return "playbackcharts"; }
+
+    void setLimit( unsigned int amount ) { m_amount = amount; }
+
+signals:
+    void artists( const QList<Tomahawk::artist_ptr>& );
+    void done();
+
+private:
+    unsigned int m_amount;
+};
+
+#endif // DATABASECOMMAND_PLAYBACKCHARTS_H