<?php

class ircprotocol{

	private $username;
	private $realname;
	private $nick;

	function __construct($nick, $username, $realname){
		$this -> nick = $nick;
		$this -> username = $username;
		$this -> realname = $realname;
	}

	/*
	 * General Stuff
	 */
	public function auth(){
		return "USER ".$this -> username." as as :".$this -> realname;
	}

	public function nick(){
		return "NICK ".$this -> nick;
	}

	public function setNick($nick){
		if($this -> nick != $nick){
			$this -> nick = $nick;
			return $this -> nick();
		}
	}

	public function join($channel){
		return "JOIN ".$channel;
	}

	public function part($channel, $msg){
		return "PART ".$channel." :".$msg;
	}

	public function away($msg){
		return "AWAY :".$msg;
	}

	public function kick($channel, $nick, $msg=""){
		return "KICK ".$channel." ".$nick." :".$msg;
	}

	public function quit($msg){
		return "QUIT :".$msg;
	}

	public function privmsg($target, $msg){
		return "PRIVMSG ".$target." :".$msg;
	}

	public function notice($target, $msg){
		return "NOTICE ".$target." :".$msg;
	}

	/*
	 * General Mode Stuff
	 */
	public function mode($channel, $detail){
		return "MODE ".$channel." ".$detail;
	}

	public function op($channel, $nick){
		return $this -> mode($channel, "+o ".$nick);
	}

	public function deop($channel, $nick){
		return $this -> mode($channel, "-o ".$nick);
	}

	public function voice($channel, $nick){
		return $this -> mode($channel, "+v ".$nick);
	}

	public function devoice($channel, $nick){
		return $this -> mode($channel, "-v ".$nick);
	}

	public function mute($channel){
		return $this -> mode($channel, "+m");
	}

	public function unmute($channel){
		return $this -> mode($channel, "-m");
	}


	/*
	 * parsing incoming IRC-Lines
	 */
	public function parse($msg){
		if(trim($msg) == "") return false;

		$expl = explode(":", $msg, 3);
		$message = (isset($expl[2])) ? $expl[2] : "";
		if(isset($expl[1])) $data = explode(" ", $expl[1]);

		//Here we need to decide whether it's a SMSG or a usual MSG
		if(isset($data[0]) && preg_match("/!/", $data[0])){
			$nick = explode("!", $data[0]);
			$banhost = (substr($nick[1],1,1) == "=") ? substr($nick[1], 2) : $nick[1];
			$iphost = explode("@", $banhost);
			$iphost = $iphost[1];
			$servermsg = false;
		}
		else{
			if(isset($data[0])) $iphost = $banhost = $data[0];
			$servermsg = true;
		}


		$msgarr = explode(" ", $message);
		$i = 0;
		foreach($msgarr as $key){
			$marr[$i] = $key;
			$i++;
		}
		unset($i);
		unset($msgarr);

		$result['servermsg'] = $servermsg;
		$result['nick'] = (isset($nick[0])) ? $nick[0] : "";
		$result['banhost'] = (isset($banhost)) ? $banhost : "";
		$result['iphost'] = (isset($iphost)) ? $iphost : "";
		$result['action'] = (isset($data[1])) ? $data[1] : "";
		$result['message'] = $message;
		$result['msgarr'] = $marr;
		$result['line'] = $msg;
		$result['target'] = (isset($data[2])) ? $data[2] : "";
		$result['origin'] = ($result['target'] == $this -> nick) ? $result['nick'] : $result['target'];
		$result['param'] = (isset($data[3])) ? $data[3] : "";

		return $result;
	}

	public function getArgs($start, $recv){
		$i = 0;
		while($i < $start){
			if(isset($recv["msgarr"][$i])) unset($recv["msgarr"][$i]);
			$i++;
		}
		return implode(" ", $recv["msgarr"]);
	}
	
	/*
	 * check for certain events
	 */
	public function checkQuery($recv){
		return ($recv["action"] == "PRIVMSG" && strtolower($recv["target"]) == strtolower($this -> nick)) ? true : false;
	}

	public function checkChannel($recv){
		return ($recv["action"] == "PRIVMSG" && strtolower($recv["target"]) != strtolower($this -> nick)) ? true : false;
	}

	public function checkCommand($prefix, $recv){
		return (isset($recv["message"][0]) && $recv["message"][0] == $prefix && $recv["action"] == "PRIVMSG" && strtolower($recv["target"]) != strtolower($this -> nick)) ? true : false;
	}

	public function getCommand($prefix, $recv){
		$expl = explode(" ", $recv["message"], 2);
		return str_replace($prefix, "", $expl[0]);
	}

	/*
	 * reacting to PING Lines...
	 */
	public function checkPing($msg){
		return (preg_match("/^PING :/", $msg)) ? str_replace("PING", "PONG", $msg) : "";
	}

}

?>