Basic Class for Yahoo! Chat / Messenger Interface

<?php

/************ Example ************

This example will send an instant message

$connection = new YahooConnection("yshoo_id","password");

$pm = new YahooPacket(3);

$pm->addContent("Yahoo_id_from");
$pm->addContent($pm->del1);
$pm->addContent("yahoo_id_to_send_to");
$pm->addContent($pm->del1);
$pm->addContent("This is a test!!");

$connection->openConnection("cs7.chat.yahoo.com",8002);
$connection->sendLoginPacket();
$connection->sendPacket($pm);
$connection->closeConnection();

************ Example ************/

/********************** Class Yahoo Connection *************************/

class YahooConnection
{
	var	$yahoosocket;
	var	$username;
	var	$password;
	var	$cookie;

	function YahooConnection($username,$password)
	{
		$this->username = $username;
		$this->password = $password;
		$this->cookie = $this->getCookie($username,$password);
	}

	function getCookie($username,$password)
	{
		$urltext = "/config/ncclogin?.src=bl&login=".$username."&passwd=".$password."&n=1";

		$fp = fsockopen ("edit.my.yahoo.com",80,$errno,$errstr,30);

		$data = "";

		if(!$fp)
		{
		return "Error: ".$errno." ".$errstr;
		}
		else
		{
			fputs($fp, "GET ".$urltext." HTTP/1.0rnrn");
			while (!feof($fp))
			{
			$data.=fgets($fp,128);
			}
			fclose($fp);
		}
	
		$response = split("n",$data);

		while(list($num,$line) = each($response))
		{
			if(strpos($line,"Set-Cookie: ") !== false)
			{
				$cookie = substr($line,12,-1);
				if(substr($cookie,0,2) == "Y=")
				{
				$cookie = substr($cookie,2,strpos($cookie,";"));
				return $cookie;
				}
			}
		}
		return "";
	}

	function openConnection($host,$port)
	{
		$this->yahoosocket = fsockopen($host,$port,$errno,$errstr,30);
	}

	function closeConnection()
	{
		fclose($this->yahoosocket);
	}

	function sendLoginPacket()
	{
		$yp=new YahooPacket(1);

		$yp->content = $this->username;
		$yp->addContent($yp->del1);
		$yp->addContent($this->cookie);

		$this->sendPacket($yp);
		$yp = $this->receivePacket();
	}

	function receivePacket()
	{
		$buffer = fread($this->yahoosocket,16);

		$rcvd = new YahooPacket();
		$rcvd->packetType = substr($buffer,8,4);
		$rcvd->flags = substr($buffer,12,2);

		$length = $buffer{15} + ( $buffer{14}*256 );

		$rcvd->content = fread($this->yahoosocket,$length);
	}

	function sendPacket($sendthis)
	{
		$buffer = chr(0x59).chr(0x43).chr(0x48).chr(0x54).chr(0x00).chr(0x00).chr(0x01).chr(0x00);

		$buffer .= $sendthis->packetType;
		$buffer .= $sendthis->flags;
		$buffer .= chr(strlen($sendthis->content) / 256);
		$buffer .= chr(strlen($sendthis->content) % 256);
		$buffer .= $sendthis->content;
		$error = fwrite($this->yahoosocket,$buffer);
	}
}

/********************** Class Yahoo Packet *************************/

class YahooPacket
{
	var	$packetType;
	var	$flags;
	var	$content;

	var	$strings;

	var	$del1;
	var	$del2;

	var	$LOGIN;
	var	$LOGOUT;
	var	$PM;

	var	$types;

	function YahooPacket($type = 0)
	{
		$this->del1 = chr(0x01);
		$this->del2 = chr(0xC0).chr(0x80);

		$this->NEW = 1;
		$this->LOGIN = 1;
		$this->LOGOUT = 2;
		$this->PM = 3;

		$this->types = array();

		$packstart = chr(0x00).chr(0x00).chr(0x00);

		$this->types[0] = $packstart.chr(0x00);
		$this->types[1] = $packstart.chr(0x01);
		$this->types[2] = $packstart.chr(0x02);
		$this->types[3] = $packstart.chr(0x45);

		$this->packetType = $this->types[$type];
		$this->flags = chr(0x00).chr(0x00);
		$this->content = "";
		
		$this->strings = array();
	}

	function addContent($toadd)
	{
		$this->content .= $toadd;
	}


	function parseType()
	{
		for($i=0; $i < sizeof($this->types); $i++)
		{
			if($this->packetType == $this->content)
			{
			return $i;
			}
		}
		return -1;
	}

    	function parseContent()
	{
		$type = $this->parseType();
	}
}

?>