NSString validator

NSString+Validator.h

//
//  NSString+Validator.h
//  IRedmine
//
//  Created by Jeremy on 29/08/12.
//  Copyright (c) 2012 opsone. All rights reserved.
//

#import <Foundation/Foundation.h>

@interface NSString (Validator)

- (BOOL)isEmail;
- (BOOL)isPhoneNumber;
- (BOOL)isDigit;
- (BOOL)isNumeric;
- (BOOL)isUrl;
- (BOOL)isLengthMin:(NSUInteger)length;
- (BOOL)isLengthMax:(NSUInteger)length;
- (BOOL)isLengthMin:(NSUInteger)min andMax:(NSUInteger)max;
- (BOOL)isEmpty;
- (NSString *)toSlug;

@end

NSStringValidator.m

//
//  NSString+Validator.m
//  IRedmine
//
//  Created by Jeremy on 29/08/12.
//  Copyright (c) 2012 opsone. All rights reserved.
//

#import "NSString+Validator.h"

@implementation NSString (Validator)

- (BOOL)isEmail {
    NSString *regex = @"[a-zA-Z0-9.\\-_]{2,32}@[a-zA-Z0-9.\\-_]{2,32}\\.[A-Za-z]{2,4}";
    NSPredicate *regExPredicate = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", regex];

    return [regExPredicate evaluateWithObject:self];
}

- (BOOL)isPhoneNumber {
    NSDataDetector *detector = [NSDataDetector dataDetectorWithTypes:NSTextCheckingTypeLink|NSTextCheckingTypePhoneNumber error:nil];

    return [detector numberOfMatchesInString:self options:0 range:NSMakeRange(0, [self length])];
}

- (BOOL)isDigit {
    NSCharacterSet *alphaNums = [NSCharacterSet decimalDigitCharacterSet];
    NSCharacterSet *inStringSet = [NSCharacterSet characterSetWithCharactersInString:self];

    return [alphaNums isSupersetOfSet:inStringSet];
}

- (BOOL)isNumeric {
    NSString *regex = @"([0-9])+((\\.|,)([0-9])+)?";
    NSPredicate *regExPredicate = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", regex];

    return [regExPredicate evaluateWithObject:self];
}

- (BOOL)isUrl {
    NSString *regex = @"(http|https)://((\\w)*|([0-9]*)|([-|_])*)+([\\.|/](([0-9a-zA-Z_-]*)*|([0-9]*)|([-|_])*))+";
    NSPredicate *regExPredicate = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", regex];

    return [regExPredicate evaluateWithObject:self];
}

- (BOOL)isLengthMin:(NSUInteger)length {
    return (self.length >= length);
}

- (BOOL)isLengthMax:(NSUInteger)length {
    return (self.length <= length);
}

- (BOOL)isLengthMin:(NSUInteger)min andMax:(NSUInteger)max {
    return ([self isLengthMin:min] && [self isLengthMax:max]);
}

- (BOOL)isEmpty {
    return (!self.length);
}

- (NSString *)toSlug {
    NSString *value = [self  lowercaseString];
    NSCharacterSet *doNotWant = [NSCharacterSet characterSetWithCharactersInString:@"/:=.;,!?\\$#@&§%£¥€*^¨°'\"{}()[]<>+"];
    value = [[value componentsSeparatedByCharactersInSet: doNotWant] componentsJoinedByString: @""];
    
    doNotWant = [NSCharacterSet characterSetWithCharactersInString:@" "];
    value = [[value componentsSeparatedByCharactersInSet: doNotWant] componentsJoinedByString: @"-"];
    
    doNotWant = [NSCharacterSet characterSetWithCharactersInString:@"àáâãäå"];
    value = [[value componentsSeparatedByCharactersInSet: doNotWant] componentsJoinedByString: @"a"];
    
    doNotWant = [NSCharacterSet characterSetWithCharactersInString:@"èéêë"];
    value = [[value componentsSeparatedByCharactersInSet: doNotWant] componentsJoinedByString: @"e"];
    
    doNotWant = [NSCharacterSet characterSetWithCharactersInString:@"òóôõöø"];
    value = [[value componentsSeparatedByCharactersInSet: doNotWant] componentsJoinedByString: @"o"];
    
    doNotWant = [NSCharacterSet characterSetWithCharactersInString:@"ìíîï"];
    value = [[value componentsSeparatedByCharactersInSet: doNotWant] componentsJoinedByString: @"i"];
    
    doNotWant = [NSCharacterSet characterSetWithCharactersInString:@"ùúûü"];
    value = [[value componentsSeparatedByCharactersInSet: doNotWant] componentsJoinedByString: @"u"];
    
    doNotWant = [NSCharacterSet characterSetWithCharactersInString:@"ÿ"];
    value = [[value componentsSeparatedByCharactersInSet: doNotWant] componentsJoinedByString: @"y"];

    doNotWant = [NSCharacterSet characterSetWithCharactersInString:@"ñ"];
    value = [[value componentsSeparatedByCharactersInSet: doNotWant] componentsJoinedByString: @"n"];
    
    doNotWant = [NSCharacterSet characterSetWithCharactersInString:@"ç"];
    value = [[value componentsSeparatedByCharactersInSet: doNotWant] componentsJoinedByString: @"c"];

    return value;
}

@end