/**

 * 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:

 * Nalina Hariharan

 * 

 * Description:

 * The Plugin that fetches activities from the logged in user's facebook account

 *

 */

#ifndef _FBACTIVITYFETCHERPLUGIN_H

#define _FBACTIVITYFETCHERPLUGIN_H

// Include files

#include <QDateTime>

#include <smfactivityfetcherplugin.h>

// Forward declarations

class FBActivityProviderBase;

class QVariant;

/**

 * The Plugin class that fetches activities from the logged in user's 

 * facebook account

 */

class FBActivityFetcherPlugin : public QObject, public SmfActivityFetcherPlugin

	{

	Q_OBJECT

	Q_INTERFACES( SmfActivityFetcherPlugin SmfPluginBase )

public:

	/**

	 * Destructor

	 */

	virtual ~FBActivityFetcherPlugin( );

public: // From SmfActivityFetcherPlugin interface

	/**

	 * Method to get the list of self activities, e.g. shown in own wall

	 * @param aRequest [out] The request data that plugin generates (to be sent to network)

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

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

	 * @return SmfPluginError Plugin error if any, else SmfPluginErrNone

	 */

	SmfPluginError selfActivities( SmfPluginRequestData &aRequest,

			const int aPageNum = SMF_FIRST_PAGE, 

			const int aItemsPerPage = SMF_ITEMS_PER_PAGE );

	/**

	 * Method to get the list of activities for other, e.g. shown in a friends wall

	 * @param aRequest [out] The request data plugin generated (to be sent to network)

	 * @param aContact [in] The contact containing the URI, name or id of the user 

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

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

	 * @return SmfPluginError Plugin error if any, else SmfPluginErrNone

	 */

	SmfPluginError friendsActivities( SmfPluginRequestData &aRequest,

			const SmfContact &aContact,			

			const int aPageNum = SMF_FIRST_PAGE, 

			const int aItemsPerPage = SMF_ITEMS_PER_PAGE );

	/**

	 * Method to get list of self activities filtered by activity type, e.g. only photo updates in own wall

	 * @param aRequest [out] The request data plugin generated (to be sent to network)

	 * @param aFilters [in] The list of activity types to be included in result

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

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

	 * @return SmfPluginError Plugin error if any, else SmfPluginErrNone

	 */

	SmfPluginError filtered( SmfPluginRequestData &aRequest,

			QList<SmfActivityObjectType> &aFilters,

			const int aPageNum = SMF_FIRST_PAGE, 

			const int aItemsPerPage = SMF_ITEMS_PER_PAGE );

	/**

	 * Customised method for SmfActivityFetcherPlugin interface

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

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

	 * the client interface and the plugin)

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

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

	 * @return SmfPluginError Plugin error if any, else SmfPluginErrNone

	 */

	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 SmfActivityFetcherPlugin: If last operation was selfActivities() or 

	 * friendsActivities() or filtered(), aResult will be of type 

	 * QList<SmfActivityEntry>. 

	 * @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 get the user's facebook ID

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

	 * @return SmfPluginError Plugin error if any, else SmfPluginErrNone

	 */

	SmfPluginError getFacebookUserId( SmfPluginRequestData &aRequest );

	/**

	 * Method to get the list of self activities, e.g. shown in own wall

	 * @param aRequest [out] The request data that plugin generates (to be sent to network)

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

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

	 * @return SmfPluginError Plugin error if any, else SmfPluginErrNone

	 */

	SmfPluginError getSelfActivities(  SmfPluginRequestData &aRequest,

			const int aPageNum = SMF_FIRST_PAGE, 

			const int aItemsPerPage = SMF_ITEMS_PER_PAGE );

	/**

	 * Method to convert the Activity verb string obtained from facebook to the 

	 * enum SmfActivityVerb

	 * @param verbStr The activity verb as a string

	 * @return The corresponding enum SmfActivityVerb

	 */

	SmfActivityVerb convertActivityverb( const QString& verbStr );

	/**

	 * Method to convert the Activity object type string obtained from 

	 * facebook to the enum SmfActivityObjectType

	 * @param objType The activity object type as a string

	 * @return The corresponding enum SmfActivityObjectType

	 */

	SmfActivityObjectType convertActivityObjectType( const QString& verbStr );

	/**

	 * 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 aSessionSecret [out] The session secret

	 * @param aAppId [out] The application ID

	 */

	void fetchKeys(	QString &aApiKey, 

			QString &aApiSecret, 

			QString &aSessionKey, 

			QString &aSessionSecret, 

			QString &aAppId);

private:

	FBActivityProviderBase *m_provider;

	};

/**

 * The Plugin class that implements SmfProviderBase for this facebook plugin

 */

class FBActivityProviderBase : public QObject, public SmfProviderBase

	{

	Q_OBJECT

	Q_INTERFACES( SmfProviderBase )

public:

	/**

	 * Destructor

	 */

	virtual ~FBActivityProviderBase( );

	/**

	 * 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 FBActivityFetcherPlugin class

	 */

	void initialize();

private:

	friend class FBActivityFetcherPlugin;

	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 /*_FBACTIVITYFETCHERPLUGIN_H*/