// Include files

#include <QtPlugin>

#include <QCryptographicHash>

#include <QTextFormat>

#include <QTextStream>

#include <QFile>

#include <QNetworkReply>

#include <QXmlStreamReader>

#include "fbpostproviderplugin.h"

// Added for flickr testing - start - put your registered app's  keys here

static const QString apiKey = "";

static const QString apiSecret = "";

static const QString sessionKey = "";

static const QString sessionSecret = "";

/**

 * 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 FBPostProviderPlugin::generateSignature(const QString aBaseString)

	{

	writeLog("FBPostProviderPlugin::generateSignature");

	// Create md5 hash of the signature string

    QByteArray byteArray;

    byteArray.insert(0, aBaseString.toAscii());

    QByteArray md5Hash = QCryptographicHash::hash(byteArray,QCryptographicHash::Md5 ).toHex();

    QString returnString (md5Hash);

    return returnString;

	}

/**

 * Method called by plugins for logging

 * @param log string to be logged

 */

void FBPostProviderPlugin::writeLog(QString log) const

	{

	QFile file("c:\\data\\PluginLogs.txt");

    if (!file.open(QIODevice::Append | QIODevice::Text))

	         ;

    QTextStream out(&file);

    out << log << "\n";

    file.close();

	}

/**

 * Destructor

 */

FBPostProviderPlugin::~FBPostProviderPlugin( )

	{

	if(m_provider)

		delete m_provider;

	}

/**

 * Method that returns maximum no of chars (unicode) that service

 * provider can post without truncation. Negative value means

 * no limit

 * @return Max characters that can be posted without truncation

 */

qint32 FBPostProviderPlugin::maxCharsInPost( ) const

		{

	qint32 maxCharsInPost = 256;

	return maxCharsInPost;

		}

/**

 * Method that returns maximum no of items that can be returned

 * in a single query to getPosts. Negative value means feature

 * not supported.

 * @return Max items that can be returned in a single query

 */

qint32 FBPostProviderPlugin::maxItems( ) const

		{

	qint32 maxItems = 10;

	return maxItems;

		}

/**

 * <Method that returns all the formatting of posts that this

 * service provider supports. May return 0 items to mean

 * only QString is supported.

 * @return Supported formats of posts

 */

QVector<QTextFormat> FBPostProviderPlugin::supportedFormats ( ) const

		{

	QVector<QTextFormat> data;

	return data;

		}

/**

 * Method that returns whether this SP supports Appearence

 * @return Returns true if Appearance is supported, else false.

 * @see SmfAppearenceInfo

 */

bool FBPostProviderPlugin::supportsAppearence ( ) const

		{

	return false;

		}

/**

 * Method to get the latest posts

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

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

 * @param aPageNum The page to be extracted

 * @param aItemsPerPage Number of items per page

 * @return SmfPluginError Plugin error if any, else SmfPluginErrNone

 */

SmfPluginError FBPostProviderPlugin::retrieve( SmfPluginRequestData &aRequest,

		const SmfContact *aUser,

		const int aPageNum ,

		const int aItemsPerPage  )

	{

	Q_UNUSED(aUser)

	writeLog("Inside FBPostProviderPlugin::retrieve");

	SmfPluginError error = SmfPluginErrInvalidRequest;

	//// Currently considering for self contatc , ie, omitting aUser

	// invalid arguments

	if( aPageNum < 0 || aItemsPerPage < 0 )

		return error;

	else

		{

		// Get the current date and time and convert it to sec as a string

		QString call_id = QString::number(QDateTime::currentDateTime().toTime_t(), 10);

		// Create the API signature string

		QString baseString;

		baseString.append("api_key="+apiKey);

		baseString.append("call_id="+call_id);

		baseString.append("format=XML");

		baseString.append("method=stream.get");

		baseString.append("session_key="+sessionKey);

		baseString.append("ss=1");

		baseString.append("v=1.0");

		baseString.append(sessionSecret);

		// Create the url

		QUrl url("http://api.facebook.com/restserver.php?");

		url.addQueryItem("api_key", apiKey);

		url.addQueryItem("call_id", call_id);

		url.addQueryItem("format", "XML");

		url.addQueryItem("method", "stream.get");

		url.addQueryItem("session_key", sessionKey);

		url.addQueryItem("ss", "1");

		url.addQueryItem("v", "1.0");

		url.addQueryItem("sig", generateSignature(baseString));

		// Create the request, set the url

		aRequest.iNetworkRequest.setUrl(url);

		aRequest.iRequestType = SmfContactRetrievePosts;

		aRequest.iPostData = NULL;

		aRequest.iHttpOperationType = QNetworkAccessManager::GetOperation;

		error = SmfPluginErrNone;

		}

	writeLog("Url string is : "+aRequest.iNetworkRequest.url().toString());

	return error;

	}

/**

 * Method to update a post to own area.

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

 * @param aPostData The post data to be posted

 * @param aLocation The location

 * @return SmfPluginError Plugin error if any, else SmfPluginErrNone

 */

SmfPluginError FBPostProviderPlugin::post( SmfPluginRequestData &aRequest,

		const SmfPost &aPostData,

		const SmfLocation &aLocation )

	{

	Q_UNUSED(aRequest)

Q_UNUSED(aPostData)

Q_UNUSED(aLocation)

	SmfPluginError error = SmfPluginErrInvalidRequest;

	return error;

	}

/**

 * Method to update the last post to own area with new data

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

 * @param aPostData The edited/new data to be posted

 * @return SmfPluginError Plugin error if any, else SmfPluginErrNone

 */

SmfPluginError FBPostProviderPlugin::updatePost( SmfPluginRequestData &aRequest,

		const SmfPost &aPostData )

	{

	Q_UNUSED(aRequest)

Q_UNUSED(aPostData)

	SmfPluginError error = SmfPluginErrInvalidRequest;

	return error;

	}

/**

 * Method to update a post to a particular contact

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

 * @param aPostData The post data to be posted

 * @param aContact The contact where the data has to be posted

 * @param aLocation The location

 * @return SmfPluginError Plugin error if any, else SmfPluginErrNone

 */

SmfPluginError FBPostProviderPlugin::postDirected( SmfPluginRequestData &aRequest,

		const SmfPost &aPostData,

		const SmfContact &aContact,

		const SmfLocation *aLocation  )

	{

	Q_UNUSED(aRequest)

Q_UNUSED(aPostData)

Q_UNUSED(aContact)

Q_UNUSED(aLocation)

	SmfPluginError error = SmfPluginErrInvalidRequest;

	return error;

	}

/**

 * Method to post a comment on a post.

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

 * @param aTarget Post on which comment has to be posted

 * @param aComment comment to be posted

 * @param aLocation location data

 */

SmfPluginError FBPostProviderPlugin::commentOnAPost(SmfPluginRequestData &aRequest,

		const SmfPost &aTarget,

		const SmfPost &aComment,

		const SmfLocation *aLocation )

	{

	Q_UNUSED(aRequest)

Q_UNUSED(aTarget)

Q_UNUSED(aComment)

Q_UNUSED(aLocation)

	SmfPluginError error = SmfPluginErrInvalidRequest;

	return error;

	}

/**

 * Method to update the presence information of the user

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

 * @param aAppearence The appearence information

 * @param aStatus The status string

 * @return SmfPluginError Plugin error if any, else SmfPluginErrNone

 */

SmfPluginError FBPostProviderPlugin::postAppearence( SmfPluginRequestData &aRequest,

		const SmfPresenceInfo &aAppearence,

		const QString &aStatus )

	{

	Q_UNUSED(aRequest)

Q_UNUSED(aAppearence)

Q_UNUSED(aStatus)

	SmfPluginError error = SmfPluginErrInvalidRequest;

	return error;

	}

/**

 * Share a contact's post to user's friends and followers

 * (e.g. retweet in twitter, share on facebook)

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

 * @param aPostData data to be posted

 * @param aContact contact to which the post belonged

 * @param aEdited whether user changed items within the post

 * @return SmfPluginError Plugin error if any, else SmfPluginErrNone

 */

SmfPluginError FBPostProviderPlugin::sharePost( SmfPluginRequestData &aRequest,

		const SmfPost &aPostData,

		const SmfContact &aContact,

		const bool &aEdited)

	{

	Q_UNUSED(aRequest)

Q_UNUSED(aPostData)

Q_UNUSED(aContact)

Q_UNUSED(aEdited)

	SmfPluginError error = SmfPluginErrInvalidRequest;

	return error;

	}

/**

 * Customised method for SmfPostProviderPlugin 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 FBPostProviderPlugin::customRequest( SmfPluginRequestData &aRequest,

		const int &aOperation, QByteArray *aData )

	{

	Q_UNUSED(aRequest)

Q_UNUSED(aOperation)

Q_UNUSED(aData)

	SmfPluginError error = SmfPluginErrInvalidRequest;

	return error;

	}

/**

 * 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.

 * Plugins are expected to save the aUtil handle and use and when required.

 * @param aUtil The instance of SmfPluginUtil

 */

void FBPostProviderPlugin::initialize( SmfPluginUtil *aUtil )

	{

	// Save the SmfPluginUtil handle

	m_util = aUtil;

	// Create an instance of FlickrProviderBase

	m_provider = new FBProviderBase;

	m_provider->initialize();

	}

/**

 * Method to get the provider information

 * @return Instance of SmfProviderBase

 */

SmfProviderBase* FBPostProviderPlugin::getProviderInfo( )

	{

	return m_provider;

	}

/**

 * Method to get the result for a network request.

 * @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 SmfPostProviderPlugin: If last operation was retrieve(), aResult will be

 * of type QList<SmfPost>. If last operation was post() or updatePost() or

 * postDirected() or commentOnAPost() or postAppearence() or sharePost(),

 * aResult will be of type bool

 * @param aRetType [out] SmfPluginRetType

 * @param aPageResult [out] The SmfResultPage structure variable

 */

SmfPluginError FBPostProviderPlugin::responseAvailable(

		const SmfTransportResult &aTransportResult,

		QByteArray *aResponse,

		QVariant* aResult,

		SmfPluginRetType &aRetType,

		SmfResultPage &aPageResult )

	{

	writeLog("FBPostProviderPlugin::::responseAvailable");

	Q_UNUSED(aPageResult)

	//This API is slightly changed by Manasij

	SmfPluginError error;

	if(SmfTransportOpNoError == aTransportResult)

		{

		writeLog("No transport error");

		// Write the response to a file

		QFile file("c:\\data\\fbresponse.txt");

		writeLog("response data written to c:\\data\\fbresponse.txt");

		if (!file.open(QIODevice::Append | QIODevice::Text))

				 ;

		file.write(aResponse->data());

		file.close();

		QList<SmfPost> list;

		// For getting contacts

		QXmlStreamReader xml(aResponse->data());

		while (!xml.atEnd())

			{

			xml.readNext();

			if (xml.tokenType() == QXmlStreamReader::StartElement)

				{

				// If the tag is contact

				if (xml.name() == "message")

					{

					writeLog("message tag found");

					SmfPost post;

					QString descStr(xml.readElementText());

					post.setDescription(descStr);

                    list.append(post);

					}

				}

			}

		aResult->setValue(list);

		aRetType = SmfRequestComplete;

		error = SmfPluginErrNone;

		}

	else

		{

		error = SmfPluginErrInvalidRequest;

		aRetType = SmfRequestError;

		}

	delete aResponse;

	return error;

	}

/**

 * Destructor

 */

FBProviderBase::~FBProviderBase( )

	{

	}

/**

 * Method to get the Localisable name of the service.

 * @return The Localisable name of the service.

 */

QString FBProviderBase::serviceName( ) const

	{

	return m_serviceName;

	}

/**

 * Method to get the Logo of the service

 * @return The Logo of the service

 */

QImage FBProviderBase::serviceIcon( ) const

	{

	return m_serviceIcon;

	}

/**

 * Method to get the Readable service description

 * @return The Readable service description

 */

QString FBProviderBase::description( ) const

	{

	return m_description;

	}

/**

 * Method to get the Website of the service

 * @return The Website of the service

 */

QUrl FBProviderBase::serviceUrl( ) const

	{

	return m_serviceUrl;

	}

/**

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

 * @return The URL of the Application providing this service

 */

QUrl FBProviderBase::applicationUrl( ) const

	{

	return m_applicationUrl;

	}

/**

 * Method to get the Icon of the application

 * @return The Icon of the application

 */

QImage FBProviderBase::applicationIcon( ) const

	{

	return m_applicationIcon;

	}

/**

 * Method to get the Plugin specific ID

 * @return The Plugin specific ID

 */

QString FBProviderBase::pluginId( ) const

	{

	return m_pluginId;

	}

/**

 * 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 FBProviderBase::authenticationApp( QString &aProgram,

		QStringList & aArguments,

		QIODevice::OpenModeFlag aMode ) const

	{

	Q_UNUSED(aProgram)

Q_UNUSED(aArguments)

Q_UNUSED(aMode)

	return m_authAppId;

	}

/**

 * 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 FBProviderBase::smfRegistrationId( ) const

	{

	return m_smfRegToken;

	}

void FBProviderBase::initialize()

	{

	m_serviceName = "Facebook";

	m_description = "Facebook plugin description";

	m_serviceUrl = QUrl(QString("http://api.facebook.com"));

	m_pluginId = "fbpostproviderplugin.qtplugin";

	m_authAppId = "Facebook AuthAppId";

	m_smfRegToken = "Facebook RegToken";

	}

/*

 * Export Macro

 * plugin name : fbpostproviderplugin

 * plugin class : FBPostProviderPlugin

 */

Q_EXPORT_PLUGIN2( fbpostproviderplugin, FBPostProviderPlugin )