<?

class parse_name
{
	function split_string($original_string){
		$pattern = '/({(?:[^{}]+(?:"[^"]*"|\'[^\']*\')?)+})/';
		return preg_split($pattern, $original_string, -1, PREG_SPLIT_DELIM_CAPTURE | PREG_SPLIT_NO_EMPTY);
	}
	
	function process_string($original_string, $variables){
		$md5 = false;
		$crc = false;
		
		if(substr($original_string,0,5) == '[MD5]'){
			$md5 = true;
			$original_string = substr($original_string,5);
		}
		elseif(substr($original_string,0,5) == '[CRC]'){
			$crc = true;
			$original_string = substr($original_string,5);
		}
		
		$breakdown = $this->split_string($original_string);
		$return_string = "";
		foreach($breakdown as $tmp_str){
			if($this->is_variable($tmp_str)){
				$tmp_str = trim($tmp_str, '{');
				$tmp_str = trim($tmp_str, '}');
				list($var_name, $len_vars) = explode("(",$tmp_str);
				
				$var_value = $variables[$var_name];
				if(strlen($len_vars) == 0)
					$return_string .= $var_value;
				else {
					$len_vars = trim($len_vars,")");
					
					$len_vars_arr = explode(',', $len_vars);
					if(count($len_vars_arr) == 1)
						$return_string .= sprintf("%0{$len_vars_arr[0]}s",$var_value);
					else {
						$return_string .= substr($var_value,$len_vars_arr[0], $len_vars_arr[1]);
					}
				}
					
			}
			else 
				$return_string .= $tmp_str;
		}
		if($md5) {
			$return_string = md5($return_string);
		}
		elseif ($crc) {
			$return_string = crc32($return_string);
		}
		
		return $return_string;
	}
	
	function is_variable($string){
		$pattern = "/{.*}$/";
		$pos = preg_match($pattern, $string);
		if($pos > 0)
			return true;
		else 
			return false;
	}
}
?>