diff -r 000000000000 -r 09774dfdd46b qtinternetradio/irqsonghistory/inc/irqsonghistoryengine.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/qtinternetradio/irqsonghistory/inc/irqsonghistoryengine.h	Mon Apr 19 14:01:53 2010 +0300
@@ -0,0 +1,139 @@
+/*
+* Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies). 
+* All rights reserved.
+* This component and the accompanying materials are made available
+* under the terms of "Eclipse Public License v1.0"
+* which accompanies this distribution, and is available
+* at the URL "http://www.eclipse.org/legal/epl-v10.html".
+*
+* Initial Contributors:
+* Nokia Corporation - initial contribution.
+*
+* Contributors:
+*
+* Description:
+*
+*/
+#ifndef IRQSONGHISTORYENGINE_H_
+#define IRQSONGHISTORYENGINE_H_
+
+#include <QObject>
+
+class IRQMetaData;
+class IRQPreset;
+class IRQSongHistoryInfo;
+class CIRSongHistoryDb;
+class IRQSongInfo;
+
+/**
+* Engine component for Internet Radio SongHistory.
+*/
+class IRQSongHistoryEngine : public QObject
+{
+    Q_OBJECT
+
+public:
+
+    IMPORT_C static IRQSongHistoryEngine* openInstance();
+    IMPORT_C void closeInstance();
+
+    /**
+    * Get all history from daba base
+    * @param    QList<IRQSongHistoryInfo *>
+    */
+    IMPORT_C void getAllHistory(QList<IRQSongHistoryInfo *>& aSongHistoryArr);
+    
+    /**
+     * this is songs' get, the above will be changed to the stations only
+     */
+    IMPORT_C void getAllSongHistory(QList<IRQSongInfo *>& aSongHistoryArr);
+
+    /**
+    * Clear all history in data base
+    */
+    IMPORT_C int clearAllHistory();
+    
+    IMPORT_C int clearAllSongHistory();
+
+    /**
+    * Called by the UI when a particular channel has been removed from the ISDS.
+    */
+    IMPORT_C void syncHistory(int aChannelId);
+
+    /**
+    * Called by the UI when a particular channel has been changed in the ISDS.
+    */
+
+    IMPORT_C void updateSongHistoryDb(int aChannelId,
+                                      const QString& aChannelName,
+                                      const QString& aChannelUrl,
+                                      const QString& aImageUrl,
+                                      const QString& aMusicFlag);
+
+    /**
+    * Connected with play controller with the song name changed.
+    * @param    aMetaData   The meta data contains song name, artist and bitrate.
+    * @param    aPreset     The preset contains other information.
+    */
+    IMPORT_C void handleMetaDataReceived(const IRQMetaData& aMetaData, const IRQPreset& aPreset);
+    /**
+    * Connected with play controller with the song name changed.
+    * @param    aMetaData   The meta data contains song name, artist and bitrate.
+    * @param    aMusicshopStatus     The music shop status of the song
+    */
+    IMPORT_C void handleSongMetaDataReceived(const IRQMetaData& aMetaData, QString& aMusicshopStatus);
+    
+    /*
+     * delete one item from the station history db
+     * @param   aIndex    the index of the item need deleted
+     */
+    IMPORT_C bool deleteOneItem(int aIndex);
+
+private:
+
+    enum TSongHistoryItemChange
+    {
+        ENOCHANGE = 0,
+        ECHANNELCHANGED,
+        EMETADATACHANGED,
+        EBLANKENTRIES
+    };
+
+private:
+
+    /**
+     *  Creates IRQSongHistoryEngine instance
+     */
+    static IRQSongHistoryEngine* createInstanceL();
+    
+    void constructL();
+
+    /**
+    * Constructor.
+    */
+    IRQSongHistoryEngine();
+
+    /**
+    * Destructor.
+    */
+    ~IRQSongHistoryEngine();
+    
+    TSongHistoryItemChange detectSongHistoryItemChangesL(const IRQMetaData& aMetaData, const QString& aChannelName);
+    
+    void handleMetaDataReceivedL(const IRQMetaData& aMetaData, const IRQPreset& aPreset);
+	void getAllHistoryL(QList<IRQSongHistoryInfo *>& aSongHistoryArr);
+	void handleSongMetaDataReceivedL(const IRQMetaData& aMetaData, QString& aMusicshopStatus);
+    void getAllSongHistoryL(QList<IRQSongInfo *>& aSongHistoryArr);
+
+private:
+
+    /** An instance of songhistory database. */
+    CIRSongHistoryDb* iSongHistoryDb;
+
+    /**
+     * Number of objects currently referring to the singleton object IRQSongHistoryEngine
+     */
+    int iSingletonInstances;
+};
+
+#endif //IRQSONGHISTORYENGINE_H_