/**

 * Copyright (c) 2010 Sasken Communication Technologies Ltd.

 * All rights reserved.

 * This component and the accompanying materials are made available

 * under the terms of the "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:

 * Chandradeep Gandhi, Sasken Communication Technologies Ltd - Initial contribution

 *

 * Contributors:

 * Sangeeta Prasad, Nalina Hariharan

 * 

 * Description:

 * The Plugin that does music playlist services related 

 * functionalities from last.fm site

 *

 */

#ifndef _LASTFMPLAYLISTSERVICEPLUGIN_H_

#define _LASTFMPLAYLISTSERVICEPLUGIN_H_

//Include files

#include <smfplaylistserviceplugin.h>

// Forward declarations

class LastFmPlaylistServiceProviderBase;

class QVariant;

// Class declaration

class LastFmPlaylistServicePlugin : public QObject, public SmfPlaylistServicePlugin

{

	Q_OBJECT

	Q_INTERFACES( SmfPlaylistServicePlugin SmfPluginBase )

public:

	/**

	 * Destructor

	 */

	virtual ~LastFmPlaylistServicePlugin ( );

public: // From SmfPlaylistServicePlugin

	/**

	 * Method to get the playlist

	 * @param aRequest [out] The request data to be sent to network

	 * @param aPageNum [in] The page to be extracted

	 * @param aItemsPerPage [in] Number of items per page

	 * @return Appropriate value of the enum SmfPluginError.

	 * Plugin error if any, else SmfPluginErrNone for success

	 */

	SmfPluginError playlists( SmfPluginRequestData &aRequest,

			const int aPageNum = SMF_FIRST_PAGE, 

			const int aItemsPerPage = SMF_ITEMS_PER_PAGE );

	/**

	 * Method to get the playlist of a particular user

	 * @param aRequest [out] The request data to be sent to network

	 * @param aUser [in] The user whose playlists need to be fetched

	 * @param aPageNum [in] The page to be extracted

	 * @param aItemsPerPage [in] Number of items per page

	 * @return Appropriate value of the enum SmfPluginError.

	 * Plugin error if any, else SmfPluginErrNone for success

	 */

	SmfPluginError playlistsOf( SmfPluginRequestData &aRequest,

			const SmfContact &aUser,

			const int aPageNum = SMF_FIRST_PAGE, 

			const int aItemsPerPage = SMF_ITEMS_PER_PAGE );

	/**

	 * Method to add tracks to a playlist

	 * @param aRequest [out] The request data to be sent to network

	 * @param aPlaylist [in] The playlist where tracks should be added

	 * @param aTracks [in] The tracks to be added to the playlist

	 * @return Appropriate value of the enum SmfPluginError.

	 * Plugin error if any, else SmfPluginErrNone for success

	 */

	SmfPluginError addToPlaylist( SmfPluginRequestData &aRequest,

			const SmfPlaylist &aPlaylist, 

			const QList<SmfTrackInfo> &aTracks );

	/**

	 * Method to post the current playing playlist

	 * @param aRequest [out] The request data to be sent to network

	 * @param aPlaylist [in] The current playing playlist which should be posted

	 * @return Appropriate value of the enum SmfPluginError.

	 * Plugin error if any, else SmfPluginErrNone for success

	 */

	SmfPluginError postCurrentPlayingPlaylist(

			SmfPluginRequestData &aRequest, 

			const SmfPlaylist &aPlaylist );

	/**

	 * Customised method for SmfPlaylistServicePlugin interface

	 * @param aRequest [out] The request data to be sent to network

	 * @param aOperation [in] The operation type (should be known between 

	 * the client interface and the plugin)

	 * @param aData [in] The data required to form the request (The type 

	 * of data should be known between client and the plugin)

	 * @return Appropriate value of the enum SmfPluginError.

	 * Plugin error if any, else SmfPluginErrNone for success

	 */

	SmfPluginError customRequest( SmfPluginRequestData &aRequest, 

			const int &aOperation, QByteArray *aData );

public: // From SmfPluginBase interface

	/**

	 * The first method to be called in the plugin that implements this interface.

	 * If this method is not called, plugin may not behave as expected.

	 */

	void initialize( );

	/**

	 * Method to get the provider information

	 * @return Instance of SmfProviderBase

	 */

	SmfProviderBase* getProviderInfo( );

	/**

	 * Method to get the result for a network request.

	 * @param aOperation The type of operation to be requested

	 * @param aTransportResult The result of transport operation

	 * @param aResponse The QByteArray instance containing the network response.

	 * The plugins should delete this instance once they have read the

	 * data from it.

	 * @param aResult [out] An output parameter to the plugin manager.If the

	 * return value is SmfSendRequestAgain, QVariant will be of type

	 * SmfPluginRequestData.

	 * For SmfMusicServicePlugin: If last operation was userMusicInfo(), aResult 

	 * will be of type SmfMusicProfile. If last operation was searchArtist(), 

	 * aResult will be of type QList<SmfArtists>. If last operation was searchAlbum(), 

	 * aResult will be of type QList<SmfAlbum>. If last operation was searchEvents(), 

	 * aResult will be of type QList<SmfEvent>. If last operation was searchVenue(), 

	 * aResult will be of type QList<Smfocation>. If last operation was searchUser(), 

	 * aResult will be of type QList<SmfMusicProfile>. If last operation was 

	 * postCurrentPlaying() or postRating() or postComments(), aResult will be of 

	 * type bool.

	 * @param aRetType [out] SmfPluginRetType

	 * @param aPageResult [out] The SmfResultPage structure variable

	 */

	SmfPluginError responseAvailable(

			const SmfRequestTypeID aOperation,

			const SmfTransportResult &aTransportResult,

			QByteArray *aResponse,

			QVariant* aResult,

			SmfPluginRetType &aRetType,

			SmfResultPage &aPageResult );

private:

	/**

	 * Method called by plugins to generate a signature string from a base string

	 * @param aBaseString The base string

	 * @return The md5 hash of the base string

	 */

	QString generateSignature( const QString aBaseString );

	/**

	 * Method to interpret the key sets obtained from credential manager 

	 * @param aApiKey [out] The api key

	 * @param aApiSecret [out] The api secret

	 * @param aSessionKey [out] The session key

	 * @param aToken [out] The session token

	 * @param aName [out] The user name

	 */

	void fetchKeys( QString &aApiKey, 

			QString &aApiSecret, 

			QString &aToken,

			QString &aName );

private:

	LastFmPlaylistServiceProviderBase *m_provider;

	};

/**

 * The Plugin class that implements SmfProviderBase for this last.fm plugin

 */

class LastFmPlaylistServiceProviderBase : public QObject, public SmfProviderBase

	{

	Q_OBJECT

	Q_INTERFACES( SmfProviderBase )

public:

	/**

	 * Destructor

	 */

	virtual ~LastFmPlaylistServiceProviderBase( );

	/**

	 * Method to get the Localisable name of the service.

	 * @return The Localisable name of the service.

	 */

	QString serviceName( ) const;

	/**

	 * Method to get the Logo of the service

	 * @return The Logo of the service

	 */

	QImage serviceIcon( ) const;

	/**

	 * Method to get the Readable service description

	 * @return The Readable service description

	 */

	QString description( ) const;

	/**

	 * Method to get the Website of the service

	 * @return The Website of the service

	 */

	QUrl serviceUrl( ) const;

	/**

	 * Method to get the URL of the Application providing this service

	 * @return The URL of the Application providing this service

	 */

	QUrl applicationUrl( ) const;

	/**

	 * Method to get the Icon of the application

	 * @return The Icon of the application

	 */

	QImage applicationIcon( ) const;

	/**

	* Method to get the list of interfaces that this provider support

	* @return List of supported Interafces

	*/

	QList<QString> supportedInterfaces( ) const;

	/**

	* Method to get the list of languages supported by this service provider

	* @return a QStringList of languages supported by this service

	* provider in 2 letter ISO 639-1 format.

	*/

	QStringList supportedLanguages( ) const;

	/**

	 * Method to get the Plugin specific ID

	 * @return The Plugin specific ID

	 */

	QString pluginId( ) const;

	/**

	 * Method to get the ID of the authentication application

	 * for this service

	 * @param aProgram The authentication application name

	 * @param aArguments List of arguments required for authentication app

	 * @param aMode Strting mode for authentication application

	 * @return The ID of the authentication application

	 */

	QString authenticationApp( QString &aProgram, QStringList & aArguments,

			QIODevice::OpenModeFlag aMode = QIODevice::ReadWrite ) const;

	/**

	 * Method to get the unique registration ID provided by the

	 * Smf for authorised plugins

	 * @return The unique registration ID/token provided by the Smf for

	 * authorised plugins

	 */

	QString smfRegistrationId( ) const;

private:

	/**

	 * Method that initializes this class. This method should be called

	 * from the initialize() method of the LastFmPlaylistServicePlugin class

	 */

	void initialize();

private:

	friend class LastFmPlaylistServicePlugin;

	QString m_serviceName;

	QImage m_serviceIcon;

	QString m_description;

	QUrl m_serviceUrl;

	QUrl m_applicationUrl;

	QImage m_applicationIcon;

	QString m_pluginId;

	QString m_authAppId;

	QString m_smfRegToken;

	QList<QString> m_supportedInterfaces;

	QStringList m_supportedLangs;

	QDateTime m_validity;

	};

#endif /* _LASTFMPLAYLISTSERVICEPLUGIN_H_ */