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CommunicationSingleton *CSS = [CommunicationSingleton sharedSingleton];

    // building the json object
    if (([emailString length] != 0) && ([passwordString length] != 0))
    {

        NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init];
        NSString *requestURLString = [NSString stringWithFormat:@"%@authorize",[CSS getDefaultAPIURL]];
        [request setURL:[NSURL URLWithString:requestURLString]];
        [request setHTTPMethod:@"POST"];
        [request setValue:@"application/json" forHTTPHeaderField:@"Content-Type"];

        NSString *requestBodyString = [NSString stringWithFormat:@"{\"user_id\": \"%@\", \"password\": \"%@\", \"client_id\": \"%@\"}",emailString,passwordString,[[NSUserDefaults standardUserDefaults] objectForKey:@"ClientIdentificationForAuthorizationPurposes"]];
        [request setHTTPBody:[requestBodyString dataUsingEncoding:NSUTF8StringEncoding]];
        [request setTimeoutInterval:60];

        __block BOOL loginFailed = NO;

        __block BOOL invalidUser = NO;

        dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_HIGH, 0), ^(void){

            //build an info object and convert to json
            NSError *requestError;
            NSHTTPURLResponse *responseHTTP;

            NSData *response = [NSURLConnection sendSynchronousRequest:request returningResponse:&responseHTTP error:&requestError];

            if ([responseHTTP statusCode] == 200)
            {
                NSDictionary *tempdict = [NSJSONSerialization JSONObjectWithData:response options:NSJSONReadingMutableContainers error:&requestError];
                [CSS setUpAuthenticationForType:[tempdict valueForKey:@"token_type"] withID:[tempdict valueForKey:@"access_token"]];

                // authorization was successfull

            } else {

                loginFailed = YES;

                if (requestError.code == -1012) {

                    // Failed because it's an invalid user

                    invalidUser = YES;

                } else {

                    // check if project list stored on device.
                    // if yes, start offline mode
                }
            }
        });

    }

CommunicationSingleton *CSS = [CommunicationSingleton sharedSingleton];

    //build an info object and convert to json
    NSError *requestError;
    NSHTTPURLResponse *responseHTTP;

    NSMutableURLRequest *requestForSlug = [[NSMutableURLRequest alloc] init];

    NSString *teamRequestString = [NSString stringWithFormat:@"%@teams",[CSS getDefaultAPIURL]];
    [requestForSlug setURL:[NSURL URLWithString:teamRequestString]];
    [requestForSlug setHTTPMethod:@"GET"];
    [requestForSlug setValue:@"application/json" forHTTPHeaderField:@"Content-Type"];
    [requestForSlug setValue:[CSS getAuthorization] forHTTPHeaderField:@"Authorization"];

    NSData *responseForSlug = [NSURLConnection sendSynchronousRequest:requestForSlug returningResponse:&responseHTTP error:&requestError];
    [requestForSlug release];

    if ([responseHTTP statusCode] == 200) {
        // Success. Team names array.
        NSArray *tempdictForSlug = [NSJSONSerialization JSONObjectWithData:responseForSlug options:NSJSONReadingMutableContainers error:&requestError];
        NSLog(@"How many teams I am part of: %d", [tempdictForSlug count]);
    }else{
        // Login Failed.
    }

CommunicationSingleton *CSS = [CommunicationSingleton sharedSingleton];

    //build an info object and convert to json
    NSError *requestError;
    NSHTTPURLResponse *responseHTTP;

    //get projectList
    NSMutableURLRequest *requestForProjectList = [[NSMutableURLRequest alloc] init];

    NSString *projectListRequestString = [NSString stringWithFormat:@"%@%@/projects",[CSS getDefaultAPIURL],[CSS getSlug]];
    [requestForProjectList setURL:[NSURL URLWithString:projectListRequestString]];
    [requestForProjectList setHTTPMethod:@"GET"];
    [requestForProjectList setValue:@"application/json" forHTTPHeaderField:@"Content-Type"];
    [requestForProjectList setValue:[CSS getAuthorization] forHTTPHeaderField:@"Authorization"];

    NSData *responseForProjectList = [NSURLConnection sendSynchronousRequest:requestForProjectList returningResponse:&responseHTTP error:&requestError];

    [requestForProjectList release];

    if (responseForProjectList == NULL) {

            // Login Failed
    }
    else {

        NSError *error;
        NSArray *projectList = [NSJSONSerialization JSONObjectWithData:responseForProjectList options:NSJSONReadingMutableContainers error:&error];

        BOOL success = [[ProjectManager sharedProjectManager] loadProjectsFromData:projectList];

        if (!success){

            // Failed to Load Projects List

        }
    }

//build an info object and convert to json
        NSError *requestError;
        NSHTTPURLResponse *responseHTTP;

        NSString* requestString = [[NSString alloc] initWithFormat:@"%@%@/projects/%@/topology",[CSS getDefaultAPIURL],[CSS getSlug], mProjectID];

        NSMutableURLRequest *requestForProjectsTree = [[NSMutableURLRequest alloc] init];
        [requestForProjectsTree setURL:[NSURL URLWithString:requestString]];
        [requestString release];

        [requestForProjectsTree setHTTPMethod:@"GET"];
        [requestForProjectsTree setValue:@"application/json" forHTTPHeaderField:@"Content-Type"];
        [requestForProjectsTree setValue:[[CommunicationSingleton sharedSingleton] getAuthorization] forHTTPHeaderField:@"Authorization"];

        NSData *response = [NSURLConnection sendSynchronousRequest:requestForProjectsTree returningResponse:&responseHTTP error:&requestError];
        [requestForProjectsTree release];

        NSString *path = [[proj getProjectFolderPath] stringByAppendingPathComponent:[NSString stringWithFormat:@"%@.topology", mProjectID]];

        if ([responseHTTP statusCode] == 200)
        {
            // Save project topology locally.
            [response writeToFile:path atomically:NO];

            // Load project topology to memory.
            [proj loadTopologyFromData:response];

        } else {

            // If Failed

            // Check if we have the last used topology for this project is available offline (rembember that this is could not be the last version)
            if ([[NSFileManager defaultManager] fileExistsAtPath:path]) {
                // Loading project topology offline

                NSData* data = [NSData dataWithContentsOfFile:path];
                [proj loadTopologyFromData:data];

            } else {
                // Download Failed + Local Storage not available
            }

        }

CommunicationSingleton *CSS = [CommunicationSingleton sharedSingleton];
NSString *urlString = [[CSS getDefaultAPIURL] stringByAppendingFormat:@"%@/projects/%@/thumbnail",[CSS getSlug],currentProject.mID];
MultIPartFormCommunication *MPC = [MultIPartFormCommunication sharedSingleton];
if (![MPC uploadImage:imagePlaceholder.image withExtension:@"jpeg" withFileName:@"thumbnail" ToURLString:urlString]){
[[ProjectManager sharedProjectManager] addUnUploadedThumbnailsProjectIdToList:currentProject.mID];
}

CommunicationSingleton *CSS = [CommunicationSingleton sharedSingleton];
//get its dictionary:
    NSMutableDictionary *currentIssueData = [self getIssueInformationForIssueId:ISSUE_ID];

    //create nsdata for uploading:
    NSError *error;
    NSData *dataForCurrentIssue = [NSJSONSerialization dataWithJSONObject:currentIssueData options:NSJSONWritingPrettyPrinted error:&error];

    //create issue request:
    NSMutableURLRequest *uploadRequestForCurrentIssue;
    uploadRequestForCurrentIssue = [[NSMutableURLRequest alloc] init];

    NSString *urlStringForIssue = [NSString stringWithFormat:@"%@%@/projects/%@/issues",
                                   [CSS getDefaultAPIURL],
                                   [CSS getSlug],
                                   self.mID];

    [uploadRequestForCurrentIssue setURL:[NSURL URLWithString:urlStringForIssue]];
    [uploadRequestForCurrentIssue setHTTPMethod:@"POST"];
    [uploadRequestForCurrentIssue setValue:@"application/json" forHTTPHeaderField:@"Content-Type"];
    [uploadRequestForCurrentIssue setValue:[CSS getAuthorization] forHTTPHeaderField:@"Authorization"];
    [uploadRequestForCurrentIssue setHTTPBody:dataForCurrentIssue];

    NSHTTPURLResponse *responseHTTPForCurrentIssue;

    NSData *responseForCurrentIssue = [NSURLConnection sendSynchronousRequest:uploadRequestForCurrentIssue returningResponse:&responseHTTPForCurrentIssue error:&error];
    [uploadRequestForCurrentIssue release];

    if ([responseHTTPForCurrentIssue statusCode] == 201) {
        // Success, issue uploaded
    }else{
        // Error, upload failed
    }

CommunicationSingleton *CSS = [CommunicationSingleton sharedSingleton];
    //create issue request:
    NSMutableURLRequest *issueListRequest;
    issueListRequest = [[NSMutableURLRequest alloc] init];

    NSString *urlStringForIssue = [NSString stringWithFormat:@"%@%@/projects/%@/issues",
                                   [CSS getDefaultAPIURL],
                                   [CSS getSlug],
                                   self.mID];
    DLog(@"%@",urlStringForIssue);
    [issueListRequest setURL:[NSURL URLWithString:urlStringForIssue]];
    [issueListRequest setHTTPMethod:@"GET"];
    [issueListRequest setValue:@"application/json" forHTTPHeaderField:@"Content-Type"];
    [issueListRequest setValue:[CSS getAuthorization] forHTTPHeaderField:@"Authorization"];

    NSHTTPURLResponse *responseHTTPForIssueList;
    NSError *error;

    NSData *rawIssueList = [NSURLConnection sendSynchronousRequest:issueListRequest returningResponse:&responseHTTPForIssueList error:&error];
    [issueListRequest release];

    if ([responseHTTPForIssueList statusCode] == 200) {
        NSMutableArray *issueList = [NSJSONSerialization JSONObjectWithData:rawIssueList options:NSJSONReadingMutableContainers error:&error];
        return  issueList;
    }else{
        return NULL;
    }

//delete it form the server
	CommunicationSingleton *CSS = [CommunicationSingleton sharedSingleton];
	//create issue request:
	NSMutableURLRequest *deleteRequest = [[NSMutableURLRequest alloc] init];

	NSString *urlStringForIssue = [NSString stringWithFormat:@"%@%@/issues/%@",
                                           [CSS getDefaultAPIURL],
                                           [CSS getSlug],
                                           issueid];

	[deleteRequest setURL:[NSURL URLWithString:urlStringForIssue]];
	[deleteRequest setHTTPMethod:@"DELETE"];
	[deleteRequest setValue:@"application/json" forHTTPHeaderField:@"Content-Type"];
	[deleteRequest setValue:[CSS getAuthorization] forHTTPHeaderField:@"Authorization"];

	NSHTTPURLResponse *responseHTTPForDeletion;
	[NSURLConnection sendSynchronousRequest:deleteRequest returningResponse:&responseHTTPForDeletion error:&error];
	[deleteRequest release];

	if ([responseHTTPForDeletion statusCode] == 200) {

		//successful deletion
		return 0;

	} else {

	//add it to a deletion list
	[self addIssueToUnDeletedIssueList:issueid];

	return 1;

	}

CommunicationSingleton *CSS = [CommunicationSingleton sharedSingleton];
    //create issue request:
    NSMutableURLRequest *pinListRequest;
    pinListRequest = [[NSMutableURLRequest alloc] init];

    NSString *urlStringForIssue = [NSString stringWithFormat:@"%@%@/issues/%@/pins",
                                   [CSS getDefaultAPIURL],
                                   [CSS getSlug],
                                   issueid];
    DLog(@"%@",urlStringForIssue);
    [pinListRequest setURL:[NSURL URLWithString:urlStringForIssue]];
    [pinListRequest setHTTPMethod:@"GET"];
    [pinListRequest setValue:@"application/json" forHTTPHeaderField:@"Content-Type"];
    [pinListRequest setValue:[CSS getAuthorization] forHTTPHeaderField:@"Authorization"];

    NSHTTPURLResponse *responseHTTPForPinList;
    NSError *error;

    NSData *rawPinList = [NSURLConnection sendSynchronousRequest:pinListRequest returningResponse:&responseHTTPForPinList error:&error];
    [pinListRequest release];

    if ([responseHTTPForPinList statusCode] == 200) {
        NSMutableArray *pinList = [NSJSONSerialization JSONObjectWithData:rawPinList options:NSJSONReadingMutableContainers error:&error];
        return  pinList;
    }else{
        return NULL;
    }

NSString *attachmentURL = [[CSS getDefaultAPIURL] stringByAppendingFormat:@"%@/issues/%@/attachments", [CSS getSlug],currentIssueId];
	MultIPartFormCommunication *MPC = [MultIPartFormCommunication sharedSingleton];
	NSString *imageName = [NSString stringWithFormat:@"issueImage%f",[[NSDate date] timeIntervalSince1970]];
	if ([MPC uploadImage:issueImage withExtension:@"jpeg" withFileName:imageName ToURLString:attachmentURL]){
                //succesful uploading
            }else{
                //unsuccesful uploading store the issue image in a list:
            }

CommunicationSingleton *CSS = [CommunicationSingleton sharedSingleton];
    NSMutableURLRequest *attachmentsRequest;
    attachmentsRequest = [[NSMutableURLRequest alloc] init];

    NSString *urlStringForIssue = [NSString stringWithFormat:@"%@%@/issues/%@/attachments",
                                   [CSS getDefaultAPIURL],
                                   [CSS getSlug],
                                   issueid];
    DLog(@"%@",urlStringForIssue);
    [attachmentsRequest setURL:[NSURL URLWithString:urlStringForIssue]];
    [attachmentsRequest setHTTPMethod:@"GET"];
    [attachmentsRequest setValue:@"application/json" forHTTPHeaderField:@"Content-Type"];
    [attachmentsRequest setValue:[CSS getAuthorization] forHTTPHeaderField:@"Authorization"];

    NSHTTPURLResponse *responseHTTPForAttachments;
    NSError *error;

    NSData *rawAttachmentsList = [NSURLConnection sendSynchronousRequest:attachmentsRequest returningResponse:&responseHTTPForAttachments error:&error];
    [attachmentsRequest release];

    if ([responseHTTPForAttachments statusCode] == 200) {
        NSMutableArray *attachmentsList = [NSJSONSerialization JSONObjectWithData:rawAttachmentsList options:NSJSONReadingMutableContainers error:&error];
        if ([attachmentsList count] > 0) {
            return attachmentsList;
        }else{
            return NULL;
        }
    }else{
        return NULL;
    }