gistfile1.m

- (void)application:(UIApplication *)application didReceiveRemoteNotification:(NSDictionary *)userInfo
        fetchCompletionHandler:(void (^)(UIBackgroundFetchResult result))completionHandler {
    @weakify(self);
    DDLogDebug(@"application:didReceiveRemoteNotification:fetchCompletionHandler: %@", userInfo);
    if (userInfo[@"layer"]){
        [[[[CAPUserController sharedUserController] layerClient]
                rac_synchronizeWithRemoteNotification:userInfo]
                subscribeNext:^(LYRMessage *message) {
                    if (message){
                        NSString *alertString = userInfo[@"aps"][@"alert"];
                        // get only the NSData from the part that is downloaded completely
                        NSArray *imageParts = [[message.parts.rac_sequence filter:^BOOL(LYRMessagePart *part) {
                            DDLogVerbose(@"part %@", part);
                            return part.transferStatus == LYRContentTransferComplete &&
                                    ([part.MIMEType containsString:@"image"]
                                    || [part.MIMEType containsString:@"png"]);
                        }] array];
                        LYRMessagePart *part = imageParts.firstObject;
                        NSData *data = part.data; // date is not nil

                        if (application.applicationState == UIApplicationStateInactive
                                || application.applicationState == UIApplicationStateActive) {
                            if (data.length > 0){
                                UIImage *im = [UIImage imageWithData:data];
                                CGSize size = im.size;

                                DDLogVerbose(@"metadata %@", NSStringFromCGSize(size));
                                if (size.width == 201 && size.height == 202){
                                    dispatch_async(dispatch_get_main_queue(), ^{
                                        // TODO custom alertview that shows the image and yes/no buttons
                                        UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"Image"
                                                                                            message:alertString
                                                                                           delegate:nil
                                                                                  cancelButtonTitle:@"YesNo"
                                                                                  otherButtonTitles:nil];
                                        [alertView show];
                                    });
                                }
                            }

                            if (alertString.length > 0) {
                                dispatch_async(dispatch_get_main_queue(), ^{
                                    UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"Message"
                                                                                        message:alertString
                                                                                       delegate:nil
                                                                              cancelButtonTitle:@"OK"
                                                                              otherButtonTitles:nil];
                                    [alertView show];
                                });
                            }
                        }

                        completionHandler(UIBackgroundFetchResultNewData);
                    } else {
                        completionHandler(UIBackgroundFetchResultNoData);
                    }
                }];
    } else {
        [PFPush handlePush:userInfo];
    }
}