<?php
error_reporting(E_ALL);

class FacebookChat {
 public $ua    = "Firefox/3.5.3 (lzyc)";
 public $cookiefile  = "cookie.txt";
 public $logged  = 0;
 
 private $email;
 private $password;
 private $attempt  = 0;
 private $html;
 
 private $uid;
 private $channel;
 private $post_form_id;
 
  function __construct($email = NULL, $password = NULL){
   
   if(!extension_loaded('curl')) die("Install curl\r\n");
   if(!extension_loaded('json')) die("Install json\r\n");
   if(version_compare(PHP_VERSION, '5.3', '<')) die("Update php to 5.3\r\n");
   
   $this->email = $email;
   $this->password = $password;
   
   $this->resetcookie();
  }

  public function login(){
   
   
   $data = array
      (
      "charset_test"  => "%E2%82%AC%2C%C2%B4%2C%E2%82%AC%2C%C2%B4%2C%E6%B0%B4%2C%D0%94%2C%D0%84",
      "locale"   => "en_US",
      "non_com_login" => "",
      "persistent"  => "1",
      "email"   => urlencode($this->email),
      "pass"   => urlencode($this->password),
      "charset_test" => "%E2%82%AC%2C%C2%B4%2C%E2%82%AC%2C%C2%B4%2C%E6%B0%B4%2C%D0%94%2C%D0%84",
      "lsd"   => "str7a"
      );
      
   $this->html = $this->postreq("http://www.facebook.com/login.php?login_attempt=1", $data, 1);
      
    
    preg_match("/<title>(.+?)<\/title>/", $this->html, $out);

    if(preg_match("/Home/", $out[1])){
        preg_match("/c_user=(.+?);/", $this->html, $out);
        $this->uid = $out[1];
      
        #preg_match("/channel(\d+)/", $this->html, $out);
        #$this->channel = $out[1];
   
        preg_match("/name=\"post_form_id\" value=\"(.+?)\"/", $this->html, $out);
        $this->post_form_id = $out[1];
   
       goto a;
     
    } else {

     $this->attempt++;
      if($this->attempt > 3){
       goto b;
      }
     $this->login();
    }
    
    a: {
     $this->logged = 1;
     return true;
    }
    
    b: return false;
  }
  
  public function buddylist()
  {
   
   if(!$this->logged) die("Are you logged?");
      
   $buddies = $this->postreq("http://www.facebook.com/ajax/chat/buddy_list.php" , array(
      "user"     => $this->uid,
      "popped_out"   => "false",
      "force_render"   => "true",
      "buddy_list"   => "1",
      "notifications"   => "0",
      "post_form_id"   => $this->post_form_id,
      "fb_dtsg"    => "90rZa",
      "post_form_id_source" => "AsyncRequest",
      "__a"     => "1"
     ));

   
    $buddies = $this->json($buddies);
    
    if(!$buddies['payload']['buddy_list']['userInfos']) die("Error\r\n");
        
    function delenableVC(&$val)
    {
     unset($val['enableVC']);
    }
    
    array_walk($buddies['payload']['buddy_list']['userInfos'], 'delenableVC');
    
    return $buddies['payload']['buddy_list']['userInfos'];

  }
  
  public function sendmsg($msg, $friend){
      
   $data = array(
      "msg_text"  => $msg,
      "msg_id"  => rand(99999, 999999),
      "to"   => $friend,
      "client_time" => time(),
      "post_form_id" => $this->post_form_id
     );
   
   print $this->postreq("http://www.facebook.com/ajax/chat/send.php", $data);
   
  }
  
  
  private function resetcookie(){
    $f = fopen($this->cookiefile, "wb");
    fclose($f); 
    
   return $f;
  }
  
  
  private function postreq($url, $postdata, $header = 0){
    $ch = curl_init($url);
    
     $opt =  curl_setopt_array ($ch, array (
        CURLOPT_REFERER   => "http://www.facebook.com",
        CURLOPT_HEADER   => $header,
        CURLOPT_FOLLOWLOCATION => 1,
        CURLOPT_RETURNTRANSFER => 1,
        CURLOPT_POST   => 1,
        CURLOPT_POSTFIELDS  => $this->postdata($postdata),
        CURLOPT_USERAGENT  => $this->ua,
        CURLOPT_COOKIEFILE  => $this->cookiefile,
        CURLOPT_COOKIEJAR  => $this->cookiefile,
        CURLOPT_SSL_VERIFYPEER => 0,
        CURLOPT_SSL_VERIFYHOST => 0
       ));

    $html = curl_exec($ch);
    curl_close($ch);
    
   return $html;
  }
  
  private function json($json)
  {
   return json_decode(substr($json, 9, strlen($json)), true);
  }
  
  private function postdata($array)
  {
   $final = NULL;
   foreach($array as $key => $val) $final .= $key."=".$val."&";
   return rtrim($final, "&");
  }
}

?>.