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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;
        NSError *dictError;

        //Get project details

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

        [requestForProjectDetails setURL:[NSURL URLWithString:[NSString stringWithFormat:@"%@%@/projects/%@",[CSS getDefaultAPIURL],[CSS getSlug],proj.mID]]];
        [requestForProjectDetails setHTTPMethod:@"GET"];
        [requestForProjectDetails setValue:@"application/json" forHTTPHeaderField:@"Content-Type"];
        [requestForProjectDetails setValue:[CSS getAuthorization] forHTTPHeaderField:@"Authorization"];

        NSData *responseForProjectDetails = [NSURLConnection sendSynchronousRequest:requestForProjectDetails returningResponse:&responseHTTP error:&requestError];
        [requestForProjectDetails release];

        if (responseHTTP.statusCode == 200) {

            // Success, we have a project detail dictionary
            NSDictionary *projectDetails = [NSJSONSerialization JSONObjectWithData:responseForProjectDetails options:NULL error:&dictError];

            // Time to process this project details as you want/need
            [proj processProjectDetails:projectDetails];

        }else{
            // Download Failed
            return;
        }

//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
            }

        }

    Project* proj = [[ProjectManager sharedProjectManager] getProjectbyID:mProjectID];

    maxNodes = [[proj getAllNodesWithoutParents] count];

    // Don't download nodes data if we want to download them dynamically
    // we are still going to need the parents
    if ( ![[[NSUserDefaults standardUserDefaults] valueForKey:kDownloadNodesDynamically] boolValue] ) {

        dispatch_async(dispatch_get_main_queue(), ^(void){

            mDownloadManager = [[DownloadManager alloc] init];
            mDownloadManager.delegate = self;

            //get disciplines
            NSArray *disciplineIds = proj.projectsDisciplineIDs;
            for (int i = 0; i < [disciplineIds count]; i++) {
                [mDownloadManager downloadFiles:[proj getAllNodesWithoutParents] forProject:mProjectID forDiscipline:[disciplineIds objectAtIndex:i]];
            }

            if ([disciplineIds count] < 1) {
                [mDownloadManager downloadFiles:[proj getAllNodesWithoutParents] forProject:mProjectID forDiscipline:NULL];
            }

        });
    }

In "downloadFiles" method there are some logic and data storage operations and for each of the discipline you can call this snippet:


	NodeHeaderDatas *nodeDatas = [mFilesToProcess objectAtIndex:0];
	NSString *nodeidForAPICall = nodeDatas.nodeID;

	CommunicationSingleton *CSS = [CommunicationSingleton sharedSingleton];
	NSMutableURLRequest *requestForNodeData = [[NSMutableURLRequest alloc] init];
	NSString *nodesURL;
        if (nodeDatas.disciplineForDownloading != NULL) {
            nodesURL = [NSString stringWithFormat:
                        @"%@%@/objects/%@/disciplines/%@/geometries/threejs",
                        [CSS getDefaultAPIURL],
                        [CSS getSlug],
                        nodeidForAPICall,
                        nodeDatas.disciplineForDownloading];
        }else{
            nodesURL = [NSString stringWithFormat:
                        @"%@%@/objects/%@/geometries/threejs",
                        [CSS getDefaultAPIURL],
                        [CSS getSlug],
                        nodeidForAPICall];

        }
        [requestForNodeData setURL:[NSURL URLWithString:nodesURL]];
        [requestForNodeData setHTTPMethod:@"GET"];
        [requestForNodeData setValue:@"application/json" forHTTPHeaderField:@"Content-Type"];
        [requestForNodeData setValue:[CSS getAuthorization] forHTTPHeaderField:@"Authorization"];

        if(requestForNodeData){
            mConnection = [[NSURLConnection alloc] initWithRequest:requestForNodeData delegate:self startImmediately:YES];
        }
if (!mConnection)
        {
            // Connection Failed
        }
        else
        {
            [mConnection scheduleInRunLoop:[NSRunLoop currentRunLoop] forMode:NSRunLoopCommonModes];
            [mConnection start

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",
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)
            {
       [CSS getDefaultAPIURL],
        NSDictionary *tempdict = [NSJSONSerialization JSONObjectWithData:response options:NSJSONReadingMutableContainers error:&requestError];
                   [CSS setUpAuthenticationForType:[tempdict valueForKey:@"token_type"] withID:[tempdict valueForKey:@"access_token"]];

CSS getSlug],
                        // authorization was successfull

        self.mID];

    } else {

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

    NSHTTPURLResponse *responseHTTPForCurrentIssue;

    NSData *responseForCurrentIssue = [NSURLConnection sendSynchronousRequest:uploadRequestForCurrentIssue   if (requestError.code == -1012) {
returningResponse:&responseHTTPForCurrentIssue error:&error];
    [uploadRequestForCurrentIssue release];

    if ([responseHTTPForCurrentIssue statusCode] == 201) {
        // Failed because it's an invalid user

Success, issue uploaded
    }else{
        // Error, upload failed
         invalidUser = YES;
}

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

    NSString *urlStringForIssue = [NSString stringWithFormat:@"%@%@/projects/%@/issues",
            // check if project list stored on device.
                    // if yes, start offline mode[CSS getDefaultAPIURL],
                }
            }
        });

    }

CommunicationSingleton *CSS = [CommunicationSingleton sharedSingleton

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]){
                [proj loadTopologyFromData:data];

//succesful uploading
            } else {
                //unsuccesful Downloaduploading store Failedthe +issue Localimage Storagein nota available
    list:
        }

        }

- (BOOL)uploadImage:(UIImage*)image withExtension:(NSString*)ext withFileName:(NSString*)fileName ToURLString:(NSString*)urlString{

    CommunicationSingleton *CSS =                  @"%@%@/objects/%@/disciplines/%@/geometries/threejs",[CommunicationSingleton sharedSingleton];
    NSURL *url                   [CSS getDefaultAPIURL],= [NSURL URLWithString:urlString];
     NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];
    // Method
    [request setHTTPMethod:@"POST"];

    // [CSS getSlug],Set headers
    NSString *boundary = @"AaB03x";
    NSString *contentType = [NSString stringWithFormat:@"multipart/form-data; boundary=%@", boundary];

    [request setValue:[CSS  nodeidForAPICall,getAuthorization] forHTTPHeaderField:@"Authorization"];
    [request addValue:contentType forHTTPHeaderField:@"Content-Type"];

    // FORM
    NSData *dataForTestImage =       nodeDatas.disciplineForDownloading]UIImageJPEGRepresentation(image, 1.0);
    NSMutableData *body =  }else{[NSMutableData data];

            nodesURL = [body appendData:[[NSString stringWithFormat:
       @"--%@--\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
    [body appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"file\"; filename=\"%@.%@\"\r\n", fileName,ext] dataUsingEncoding:NSUTF8StringEncoding]];
    [body  appendData:[@"%@%@/objects/%@/geometries/threejs",Content-Type: application/octet-stream\r\n\r\n" dataUsingEncoding:NSUTF8StringEncoding]];
    [body appendData:dataForTestImage];

    // fileName
    [body appendData:[[NSString stringWithFormat:@"\r\n--%@--\r\n",        [CSS getDefaultAPIURL],boundary] dataUsingEncoding:NSUTF8StringEncoding]];
    [body                    [CSS getSlug],appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"fileName\"\r\n\r\n%@.%@", fileName,ext] dataUsingEncoding:NSUTF8StringEncoding]];

    // type
    [body appendData:[[NSString stringWithFormat:@"\r\n--%@--\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
           nodeidForAPICall[body appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"type\"\r\n\r\nimage/%@", ext] dataUsingEncoding:NSUTF8StringEncoding]];

        }
    // size
    [requestForNodeDatabody setURLappendData:[[NSURLNSString URLWithString:nodesURL]];
        [requestForNodeData setHTTPMethod:@"GET"];
 stringWithFormat:@"\r\n--%@--\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
       [requestForNodeDatabody setValue:@"application/json" forHTTPHeaderFieldappendData:[[NSString stringWithFormat:@"Content-Type"];
        [requestForNodeData setValue:[CSS getAuthorization] forHTTPHeaderField:@"Authorization"];Disposition: form-data; name=\"size\"\r\n\r\n%d", [dataForTestImage length]] dataUsingEncoding:NSUTF8StringEncoding]];


        if(requestForNodeData){// objectIds
    [body appendData:[[NSString stringWithFormat:@"\r\n--%@--\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
    mConnection = [body appendData:[[NSURLConnection alloc] initWithRequest:requestForNodeData delegate:self startImmediately:YES];
        }
if (!mConnection)
        {
            // Connection FailedNSString stringWithFormat:@"Content-Disposition: form-data; name=\"objectIds\"\r\n\r\n%@", @""]
dataUsingEncoding:NSUTF8StringEncoding]];

    // End
    [body appendData:[[NSString stringWithFormat:@"\r\n--%@--\r\n",  }boundary] dataUsingEncoding:NSUTF8StringEncoding]];

        else
  [request setHTTPBody:body];

    NSHTTPURLResponse*  {response;
    NSError* err;
       [mConnectionNSURLConnection scheduleInRunLoop:[NSRunLoop currentRunLoop] forMode:NSRunLoopCommonModes];sendSynchronousRequest:request
            [mConnection start];
        }
        [requestForNodeData release];