/**

 * 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 manages post operations on the logged in user's facebook account

 *

 */

// Include files

#include <QtPlugin>

#include <QCryptographicHash>

#include <QTextFormat>

#include <QFile>

#include <QVariant>

#include <QListIterator>

#include <QDebug>

#include <QSettings>

#include <smfpluginutil.h>

#ifdef SMF_XMLPARSING

#include <QXmlStreamReader>

#endif

#include "fbpostproviderplugin.h"

static int chance = 0;

QString uid;

#ifdef SMF_XMLPARSING

SmfPost mypost;

SmfContact contact;

QString currentId;

#endif

QMap<QString, QString> idNameMap;

QMap<QString, QString> idPicMap;

// Todo:- Macro added for limiting items fetched to recent 5

// Remove after demo

#define SETLIMITOFFIVEFORSMFDEMO 1

/**

 * 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)

	{

	qDebug()<<"Inside 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 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

 */

void FBPostProviderPlugin::fetchKeys( QString &aApiKey, 

		QString &aApiSecret, 

		QString &aSessionKey, 

		QString &aSessionSecret )

	{

	qDebug()<<"Inside FBPostProviderPlugin::fetchKeys()";

	qDebug()<<"Reg Token = "<<m_provider->m_smfRegToken;

	qDebug()<<"Expiry Date as int = "<<m_provider->m_validity.toTime_t();

	SmfAuthParams keys;

	SmfPluginUtil util;

	util.getAuthKeys(keys, m_provider->m_smfRegToken, 

			m_provider->m_validity, m_provider->m_pluginId);

	qDebug()<<"Number of key-value pairs = "<<keys.count();

    QByteArray keyName;

    keyName.append("ApiKey");

	aApiKey.append(keys.value(keyName));

    keyName.clear();

    keyName.append("ApiSecret");

	aApiSecret.append(keys.value(keyName));

	keyName.clear();

    keyName.append("SessionKey");

	aSessionKey.append(keys.value(keyName));

	keyName.clear();

    keyName.append("SessionSecret");

	aSessionSecret.append(keys.value(keyName));

	qDebug()<<"Api Key = "<<aApiKey;

	qDebug()<<"Api Secret = "<<aApiSecret;

	qDebug()<<"session Key = "<<aSessionKey;

	qDebug()<<"session Secret = "<<aSessionSecret;

	}

/**

 * 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

	{

	qDebug()<<"Inside FBPostProviderPlugin::maxCharsInPost()";

	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

	{

	qDebug()<<"Inside FBPostProviderPlugin::maxItems()";

	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

	{

	qDebug()<<"Inside FBPostProviderPlugin::supportedFormats()";

	QTextFormat f1, f2;

	QVector<QTextFormat> data;

	data.append(f1);

	data.append(f2);

	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

	{

	qDebug()<<"Inside FBPostProviderPlugin::supportsAppearence()";

	return true;

	}

/**

 * 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  )

	{

	qDebug()<<"Inside FBPostProviderPlugin::retrieve()";

	if(0 != aUser->value("Guid").value<QContactGuid>().guid().size())

		chance = 1;

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

	if(0 == chance)

		return getFacebookUserId(aRequest);

	else

		return getPosts(aRequest, aUser, aPageNum , aItemsPerPage);

	}

/**

 * 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 FBPostProviderPlugin::getFacebookUserId( 

		SmfPluginRequestData &aRequest )

	{

	qDebug()<<"Inside FBPostProviderPlugin::getFacebookUserId()";

	SmfPluginError error = SmfPluginErrUserNotLoggedIn;

	// Get the key sets from SMF Plugin Utility class.

	QString apiKey;

	QString apiSecret;

	QString sessionKey;

	QString sessionSecret;

	fetchKeys(apiKey, apiSecret, sessionKey, sessionSecret);

	// 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);

#ifdef SMF_XMLPARSING

	baseString.append("format=XML");

#else

	baseString.append("format=JSON");

#endif

	baseString.append("method=users.getLoggedInUser");

	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);

#ifdef SMF_XMLPARSING

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

#else

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

#endif

	url.addQueryItem("method", "users.getLoggedInUser");

	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;

	qDebug()<<"Url string is : "<<aRequest.iNetworkRequest.url().toString();

	return error;

	}

/**

 * Method to get the user's 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::getPosts( 

		SmfPluginRequestData &aRequest,

		const SmfContact *aUser, 

		const int aPageNum , 

		const int aItemsPerPage  )

	{

	qDebug()<<"Inside FBPostProviderPlugin::getPosts()";

	qDebug()<<"Required guid = "<<aUser->value("Guid").value<QContactGuid>().guid();

	qDebug()<<"aPageNum = "<<aPageNum;

	qDebug()<<"aItemsPerPage = "<<aItemsPerPage;

	SmfPluginError error = SmfPluginErrInvalidArguments;

	// invalid arguments

	if( aPageNum < 0 || aItemsPerPage < 0 )

		{

		qDebug()<<"Invalid arguments";

		return error;

		}

	qDebug()<<"Valid arguments";

	// Get the key sets from SMF Plugin Utility class.

	QString apiKey;

	QString apiSecret;

	QString sessionKey;

	QString sessionSecret;

	fetchKeys(apiKey, apiSecret, sessionKey, sessionSecret);

	// 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);

#ifdef SMF_XMLPARSING

	baseString.append("format=XML");

#else

	baseString.append("format=JSON");

#endif

#ifdef SETLIMITOFFIVEFORSMFDEMO  // Hard coding the number of posts fetched as recent 5

	qDebug()<<"Hardcoding pagenumber and itemperpage to fetch 5 recent posts";

	int val = 5;

	baseString.append("limit="+QString::number(val));

#else

	if(0 == aPageNum)

		baseString.append("limit="+QString::number((aItemsPerPage*(aPageNum+1)), 10));

	else

		baseString.append("limit="+QString::number((aItemsPerPage*aPageNum), 10));

#endif

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

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

	if(0 != aUser->value("Guid").value<QContactGuid>().guid().size())

		baseString.append("source_ids="+aUser->value("Guid").value<QContactGuid>().guid());

	else

	baseString.append("source_ids="+uid);

	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);

#ifdef SMF_XMLPARSING

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

#else

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

#endif

#ifdef SETLIMITOFFIVEFORSMFDEMO  // Hard coding the number of posts fetched as recent 5

	qDebug()<<"Hardcoding pagenumber and itemperpage to fetch 5 recent posts";

	val = 5;

	url.addQueryItem("limit", QString::number(val));

#else

	if(0 == aPageNum)

		url.addQueryItem("limit", QString::number((aItemsPerPage*(aPageNum+1)), 10));

	else

		url.addQueryItem("limit", QString::number((aItemsPerPage*aPageNum), 10));

#endif

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

	url.addQueryItem("session_key", sessionKey);

	if(0 != aUser->value("Guid").value<QContactGuid>().guid().size())

		url.addQueryItem("source_ids",aUser->value("Guid").value<QContactGuid>().guid());

	else

	url.addQueryItem("source_ids",uid);

	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;

	qDebug()<<"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)

	qDebug()<<"Inside FBPostProviderPlugin::post()";

	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)

	qDebug()<<"Inside FBPostProviderPlugin::updatePost()";

	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(aLocation)

	qDebug()<<"Inside FBPostProviderPlugin::postDirected()";

	SmfPluginError error = SmfPluginErrInvalidArguments;

	// invalid arguments

	qDebug()<<"To be Post data = "<<aPostData.description();

	qDebug()<<"To be posted Contact id = "<<aContact.value("Guid").value<QContactGuid>().guid();

	if( (0 == aPostData.description().size()) || (0 == aContact.value("Guid").value<QContactGuid>().guid().size()) )

		{

		qDebug()<<"Invalid arguments";

		return error;

		}

	qDebug()<<"Valid arguments";

	// Get the key sets from SMF Plugin Utility class.

	QString apiKey;

	QString apiSecret;

	QString sessionKey;

	QString sessionSecret;

	fetchKeys(apiKey, apiSecret, sessionKey, sessionSecret);

	// 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);

#ifdef SMF_XMLPARSING

	baseString.append("format=XML");

#else

	baseString.append("format=JSON");

#endif

	baseString.append("message="+aPostData.description());

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

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

	baseString.append("ss=1");

	baseString.append("target_id="+aContact.value("Guid").value<QContactGuid>().guid());

	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);

#ifdef SMF_XMLPARSING

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

#else

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

#endif

	url.addQueryItem("message", aPostData.description());

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

	url.addQueryItem("session_key", sessionKey);

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

	url.addQueryItem("target_id", aContact.value("Guid").value<QContactGuid>().guid());

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

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

	// Create the request, set the url

	aRequest.iNetworkRequest.setUrl(url);

	aRequest.iRequestType = SmfContactPostDirected;

	aRequest.iPostData = NULL;

	aRequest.iHttpOperationType = QNetworkAccessManager::GetOperation;

	error = SmfPluginErrNone;

	qDebug()<<"Url string is : "<<aRequest.iNetworkRequest.url().toString();

	return error;