/**

 * 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:

 * Manasij Roy, Nalina Hariharan

 * 

 * Description:

 * SmfPostProvider

 *

 */

#ifndef SMFPOSTPROVIDER_H

#define SMFPOSTPROVIDER_H

#include <QObject>

#include <qmobilityglobal.h>

#include <qgeopositioninfo.h>

#include <QTextDocument>

#include "smfglobal.h"

#include "smfclientglobal.h"

#include "smfprovider.h"

#include "smfcontact.h"

#include "smflocation.h"

#include "smfpost.h"

#include "smfpostprovider_p.h"

/**

 * @ingroup smf_client_group 

 * Interface to post scrap/tweet like info.

 * Note that branding information for the particular service implementation

 * is available from getProvider() API. See also:

 * SmfProvider::serviceName(), SmfProvider::serviceIcon(), SmfProvider::description()

 *

 * Interface name for SmfPostProvider is org.symbian.smf.client.contact.posts

 */

class SMFCLIENT_EXPORT SmfPostProvider : public QObject

	{

	Q_OBJECT

public:

	/**

	 * Constructs SmfPostProvider.

	 * @param baseProvider The base provider info

	 * Seeing as this is a plug-in implementation, these will realistically

	 * be generated by SMF factory of some kind

	 */

	SmfPostProvider(SmfProvider* baseProvider);

	~SmfPostProvider();

public:

	/**

	 * returns maximum no of chars (unicode) that service provider can post without truncation

	 * negative value means no limit

	 */

	qint32 maxCharsInPost() const;

	/**

	 * returns maximum no of items that can be returned in a single query to getPosts

	 * negative value means feature not supported.

	 */

	qint32 maxItems() const;

	/**

	 * returns all the formatting of posts that this service provider supports.

	 * May return 0 items to mean only QString is supported.

	 */

	QVector<QTextFormat> supportedFormats () const;

	/**

	 * returns whether this SP supports Appearence @see SmfAppearenceInfo

	 */

	bool supportsAppearence () const;

public slots:

	/**

	 * Gets the posts asynchronously. The signal postsAvailable()with SmfPostList is emitted

	 * once the post lists are available

	 * @param user user's contact in this SP, omit for self contact

	 * @param pageNum Page number to download, SMF_FIRST_PAGE denotes fresh query.

     * @param perPage Item per page, default is SMF_ITEMS_PER_PAGE 

	 * @see postsAvailable()

	 */

	void posts(SmfContact* user = 0,int pageNum=SMF_FIRST_PAGE,int perPage=SMF_ITEMS_PER_PAGE);

	/**

	 * Updates a post to own area, the success of the post can be checked with signal

	 * updatePostFinished() signal

	 * @param postData data to be posted

	 * @param location location data

	 */

	void post(SmfPost& postData,SmfLocation& location) ; 

	/**

	 * Updates the last post to own area with new data, the success of the post can be checked with signal

	 * updatePostFinished() signal

	 * @param postData edited/new data to be posted

	 * @param location location data

	 */

	void updatePost(SmfPost& postData); 

	/**

	 * Updates a post to a particular Smf contact. the success of the post can be checked with signal

	 * updatePostFinished() signal.

	 * @param postData data to be posted

	 * @param contact contact to which the post is to be directed

	 * @param location location data

	 */

	void postDirected(SmfPost& postData,SmfContact& contact,SmfLocation* location=0);

	/**

	 * Posts appearance info of the user.e.g. appear offline, busy, do-not-disturb

	 * @param appearence user appearance

	 * @see SmfPresenceInfo

	 * @return False on Failure/Not supported 

	 */

	bool postAppearence(SmfAppearenceInfo appearence); 

	/**

	 * Share /a contact's post to user's friends and followers (e.g. retweet in twitter, share on facebook)

	 * emits updatePostFinished() signal when done.

	 * @param postData data to be posted

	 * @param contact contact to which the post belonged

	 * @param bool whether user changed items within the post

	 */

	void sharePost(SmfPost& postData,SmfContact& contact,bool edited);

   /**

	* Request for a custom operation.

	* @param operationId OperationId

	* @param customData Custom data to be sent

	* Note:-Interpretation of operationId and customData is upto the concerned

	* plugin and client application. service provider should provide some

	* serializing-deserializing utilities for these custom data

	*/

   void customRequest(const int& operationId,QByteArray* customData){/*to be implemented*/};

	//APIs to get/set base provider info (SmfProvider)

	/**

	 * Gets the base provider info

	 */

	SmfProvider* getProvider() const;

signals:

	/**

	 * Emitted when a request to  getPosts() is finished

	 * Note if number of posts is large, then it can download the list page by page

	 * In that case this signal is emitted multiple times.

	 * @param list list of posts

	 * @param error error string

	 * @param resultPage Page number info

	 */

	void postsAvailable(SmfPostList* list, SmfError error, SmfResultPage resultPage);

	/**

	 * Emitted when update post is finished.

	 * @param success the success of the update

	 */

	void postFinished(SmfError success);

	/**

	 * Emitted when custom data is available

	 * @param operationId Requested operation id

	 * @param customData Custom data received, interpretation is not the responsibility of Smf

	 */

	void customDataAvailable(int operationId, QByteArray* customData);

	//friend so that it can directly emit SmfPostProvider's signal

	friend class SmfPostProviderPrivate;

private:

	SmfProvider* m_baseProvider;

	//private impl wrapper

	SmfPostProviderPrivate* m_private;

};

SMF_SERVICE_NAME(SmfPostProvider, "org.symbian.smf.client.contact.posts\0.2")

#endif // SMFPOSTPROVIDER_H