Normalized String

- (NSString *)normalizeString:(NSString *)string
{
	NSString *normalizedString = [[string copy] stringByStandardizingPath]; // copy to keep thread-safe;
	if ([normalizedString hasPrefix:@".."]) {
		normalizedString = [normalizedString substringFromIndex:2];
	}

	if ([normalizedString containsString:@"/../"]) {
		NSArray *components = [normalizedString componentsSeparatedByString:@"/../"];
		NSMutableArray *tempComponents = [components mutableCopy];
		for (NSString *component in components) {
			if (![component containsString:@"/"]) {
				continue;
			}
			NSRange range = [component rangeOfString:@"/"];
			NSString *string = [component substringToIndex:range.location];
			[tempComponents replaceObjectAtIndex:[components indexOfObject:component] withObject:string];
		}
		components = [tempComponents copy];
		normalizedString = [components componentsJoinedByString:@"/"];
	}
	return normalizedString;
}

@end