URLParser

//HEADER

#import <Foundation/Foundation.h>

@interface URLParser : NSObject {
    NSArray *variables;
}

@property (nonatomic, retain) NSArray * variables;

- (id) initWithURLString:(NSString *) url;
- (NSString *) valueForVariable:(NSString *) varName;

@end

//IMPLEMENTATION

#import "URLParser.h"

@implementation URLParser
@synthesize variables;

- (id) initWithURLString:(NSString *) url{
    self = [super init];
    if(self != nil) {
        NSString * string = url;
        NSScanner * scanner = [NSScanner scannerWithString:string];
        [scanner setCharactersToBeSkipped:[NSCharacterSet characterSetWithCharactersInString:@"&?"]];
        NSString * tempString = nil;
        NSMutableArray * vars = [NSMutableArray new];
        [scanner scanUpToString:@"?" intoString:nil];
        while([scanner scanUpToString:@"&" intoString:&tempString]) {
            [vars addObject:[tempString copy]];
        }
        self.variables = vars;
    }
    return self;
}

- (NSString *) valueForVariable:(NSString *) varName {
    for (NSString * var in self.variables) {
        if ([var length] > [varName length]+1 && [[var substringWithRange:NSMakeRange(0, [varName length]+1)] isEqualToString:[varName stringByAppendingString:@"="]]) {
            NSString * varValue = [var substringFromIndex:[varName length]+1];
            return varValue;
        }
    }
    return nil;
}

@end