Send a zap card

gistfile1.txt

            PFObject *recipient;
            recipient = [selectedRecipient objectForKey:@"cardOwner"];
            //send card to recipient
            PFQuery *checkExisting = [PFQuery queryWithClassName:@"exchangedCards"];
            [checkExisting whereKey:@"cardRecipient" equalTo:recipient];
            [checkExisting whereKey:@"zapCard" equalTo:selectedCardToSend];
            [checkExisting findObjectsInBackgroundWithBlock:^(NSArray *objects, NSError *error) {
                if (objects.count == 0) {
                    //send your card to person
                    PFObject *exchangeCard = [PFObject objectWithClassName:@"exchangedCards"];
                    [exchangeCard setObject:[PFUser currentUser] forKey:@"user"];
                    [exchangeCard setObject:recipient forKey:@"cardRecipient"];
                    [exchangeCard setObject:selectedCardToSend forKey:@"zapCard"];
                    [exchangeCard setObject:@"0" forKey:@"cardAccepted"];
                    if (point) {
                        [exchangeCard setObject:point forKey:@"locationExchanged"];
                    }
                    [exchangeCard saveInBackgroundWithBlock:^(BOOL succeeded, NSError *error) { 
                        if (!error) {
                            
                            [PFPush sendPushMessageToChannelInBackground:[recipient objectId]
                                                             withMessage:[NSString stringWithFormat:@"%@ %@", [selectedCardToSend objectForKey:@"name"], @"would like to send you a ZAP card"]];
                            UIAlertView *alert = [[UIAlertView alloc]initWithTitle:@"Zap Card Sent" message:@"Zap Card has been sent to the selected user" delegate:self cancelButtonTitle:@"OK" otherButtonTitles:nil, nil];
                            [alert show];
                        }
                        else {
                            UIAlertView *alert = [[UIAlertView alloc]initWithTitle:@"Error" message:[[error userInfo] objectForKey:@"error"] delegate:self cancelButtonTitle:@"OK" otherButtonTitles:nil, nil];
                            [alert show];
                        }
                    }];
                    
                }
                else {
                    UIAlertView *alert = [[UIAlertView alloc]initWithTitle:@"Error" message:@"This user already has the Zap Card which you are trying to send" delegate:self cancelButtonTitle:@"OK" otherButtonTitles:nil, nil];
                    [alert show];
                }
            }];
            //get recipient's card
            //check if the user already has this card
            PFQuery *crossCheckExisting = [PFQuery queryWithClassName:@"exchangedCards"];
            [crossCheckExisting whereKey:@"cardRecipient" equalTo:[PFUser currentUser]];
            [crossCheckExisting whereKey:@"zapCard" equalTo:selectedRecipient];
            [crossCheckExisting findObjectsInBackgroundWithBlock:^(NSArray *objects, NSError *error) {
                if (objects.count == 0) {
                    //Get person's card
                    PFObject *exchangeCard = [PFObject objectWithClassName:@"exchangedCards"];
                    [exchangeCard setObject:[PFUser currentUser] forKey:@"cardRecipient"];
                    [exchangeCard setObject:recipient forKey:@"user"];
                    [exchangeCard setObject:selectedRecipient forKey:@"zapCard"];
                    [exchangeCard setObject:@"1" forKey:@"cardAccepted"];
                    if (point) {
                        [exchangeCard setObject:point forKey:@"locationExchanged"];
                    }
                    [exchangeCard saveInBackgroundWithBlock:^(BOOL succeeded, NSError *error) { 
                        if (!error) {
  
                        }
                        else {
                            UIAlertView *alert = [[UIAlertView alloc]initWithTitle:@"Error" message:[[error userInfo] objectForKey:@"error"] delegate:self cancelButtonTitle:@"OK" otherButtonTitles:nil, nil];
                            [alert show];
                        }
                    }];
                    
                }
            }];