CodeSprint-iOS/CodeSprint/ErrorCheckUtil.m at master · chauvincent/CodeSprint-iOS · GitHub

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//
//  ErrorCheckUtil.m
//  CodeSprint
//
//  Created by Vincent Chau on 7/24/16.
//  Copyright © 2016 Vincent Chau. All rights reserved.
//

#import "ErrorCheckUtil.h"

@implementation ErrorCheckUtil

- (instancetype)initWith
{
    if (self = [super init]) {

    }

    return self;
}

- (UIAlertController *)checkBadInput:(NSString *)inputText withMessage:(NSString *)message andDismiss:(NSString *)dismissTitle withSuccessMessage:(NSString *)successMessage title:(NSString *)sucessTitle
{

    if ([inputText isEqualToString:@""]) {
        return [self showAlertWithTitle:@"Error: Blank Input" andMessage:message
                 andDismissNamed:dismissTitle];
    }
    NSCharacterSet *charSet = [NSCharacterSet
                               characterSetWithCharactersInString:@"abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890_- "];
    charSet = [charSet invertedSet];
    NSRange range = [inputText rangeOfCharacterFromSet:charSet];

    if (range.location != NSNotFound) {
        return [self showAlertWithTitle:@"Invalid Characters" andMessage:@"Please enter a name containing only: [A-Z], [a-z], [0-9], -, _"
                 andDismissNamed:@"Dismiss"];
    }

    UIAlertController *success = [self showAlertWithTitle:sucessTitle andMessage:successMessage
                                          andDismissNamed:@"OK"];

    return success; // returns nil if valid input
}

- (UIAlertController *)checkBadInputForTextViews:(NSString *)inputText withMessage:(NSString *)message andDismiss:(NSString *)dismissTitle withSuccessMessage:(NSString *)successMessage title:(NSString *)sucessTitle
{

    if ([inputText isEqualToString:@""]) {
        return [self showAlertWithTitle:@"Error: Blank Input" andMessage:message
                        andDismissNamed:dismissTitle];
    }
    NSCharacterSet *charSet = [NSCharacterSet
                               characterSetWithCharactersInString:@"abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890_-:!@#$%^&*()-=+{}[];:'/., "];
    charSet = [charSet invertedSet];
    NSRange range = [inputText rangeOfCharacterFromSet:charSet];

    if (range.location != NSNotFound) {
        return [self showAlertWithTitle:@"Invalid Characters" andMessage:@"Some invalid characters may have been detected."
                        andDismissNamed:@"Dismiss"];
    }

    UIAlertController *success = [self showAlertWithTitle:sucessTitle andMessage:successMessage
                                          andDismissNamed:@"OK"];

    return success; // returns nil if valid input
}

- (UIAlertController *)showAlertWithTitle:(NSString *)title andMessage:(NSString *)message andDismissNamed:(NSString *)dismiss
{
    UIAlertController *alert = [UIAlertController alertControllerWithTitle:title message:message preferredStyle:UIAlertControllerStyleAlert];
    UIAlertAction *cancel = [UIAlertAction actionWithTitle:dismiss style:UIAlertActionStyleCancel handler:nil];
    [alert addAction:cancel];

    return alert;
}

@end