<?php

/**
 * Last.fm to Twitter/Blip class
 *
 * Display your favorite songs from Last.fm list on Twitter of Blip.
 *
 * @author Harv - http://harv.pl adapted to OOP by cypherq - http://cypherq.wordpress.com
 * @license Beerware - http://pl.wikipedia.org/wiki/Beerware
 * @version 1.0
 * @example /example.php Simple example
 */
class Blitter
{

    /**
     * User, password. For Twitter and Blip both
     */
    private $user;
    private $pass;

    /**
     * Set service to use (Capital letter at first)
     * Ex. private $service = 'Blip';
     */
    private $service;

    /**
     * Last.fm user name
     */
    private $lfm_user;

    /**
     * Various support variables
     */
    private $tmp_fn = 'lsfm_tw';
	private $xml_file_name = 'class.xml.php';
    private $buffer;
    private $message;

    /**
     *  API's, URL's
     */
    private $tw_url  = 'http://twitter.com/statuses/update.xml';
    private $bl_url  = 'http://api.blip.pl/updates';

    /**
     * Constructor - only for assign variables passed by params
     *
     * @param string $user Blip/Twitter user name
     * @param string $pass Blip/Twitter password
     * @param string $lfm_user Last.fm username
     * @param string $service Service name (where we want post)
     */
    public function __construct($user, $pass, $lfm_user, $service)
    {
        $this -> user = $user;
        $this -> pass = $pass;
        $this -> lfm_user = $lfm_user;
        $this -> service = $service;
    }

    public function post()
    {
        $this -> service = 'post'.$this -> service;
        if(is_callable($this -> service, true, $callablename)) { call_user_func(array(get_class($this), $this -> service)); }
    }

    /**
      * Method send message to Twitter
      *
      * @param string $message Prepared message to send
      */
    public function postTwitter()
    {
        $curl_handle = curl_init();
        curl_setopt($curl_handle, CURLOPT_URL, $this -> tw_url);
        curl_setopt($curl_handle, CURLOPT_CONNECTTIMEOUT,2);
        curl_setopt($curl_handle, CURLOPT_RETURNTRANSFER,1);
        curl_setopt($curl_handle, CURLOPT_POST,1);
        curl_setopt($curl_handle, CURLOPT_POSTFIELDS, 'status='.$this -> message);
        curl_setopt($curl_handle, CURLOPT_USERPWD, $this -> user.':'.$this -> pass);
        $this -> buffer = curl_exec($curl_handle);
        curl_close($curl_handle);

        if ($this -> buffer)
        {
            return TRUE;
        }
        else
        {
            return $this -> buffer;
        }
    }

    /**
     * Method send message to Blip
     *
     * @param string $message Prepared message to send
     */
    public function postBlip()
    {
        $curl_handle = curl_init();
        curl_setopt($curl_handle, CURLOPT_URL, $this -> bl_url);
        curl_setopt($curl_handle, CURLOPT_CONNECTTIMEOUT,2);
        curl_setopt($curl_handle, CURLOPT_RETURNTRANSFER,1);
        curl_setopt($curl_handle, CURLOPT_POST,1);
        curl_setopt($curl_handle, CURLOPT_POSTFIELDS, 'body='.$this -> message);
        curl_setopt($curl_handle, CURLOPT_USERPWD, $this -> user.':'.$this -> pass);
        $this -> buffer = curl_exec($curl_handle);
        curl_close($curl_handle);

        if($this -> buffer)
        {
            return TRUE;
        }
        else
        {
            return $this -> buffer;
        }
    }

    /**
     * Model method
     *
     * Parsing XML, preparing data, for post, updating tmp file
     *
     * @todo Kick tmp file operating lines to other method (needed?)
     */
    public function getList()
    {
        $lfm_url = 'http://ws.audioscrobbler.com/1.0/user/'.$this -> lfm_user.'/recentlovedtracks.xml';

        include_once($this -> xml_file_name);
        $raw = new xx_xml($lfm_url ,'url');

        $last_url = $raw -> data ['recentlovedtracks|track|url']['data'][0] ;
        $last_artist = $raw -> data ['recentlovedtracks|track|artist']['data'][0] ;
        $last_track = $raw -> data ['recentlovedtracks|track|name']['data'][0] ;
        $lat_date = $raw -> data ['recentlovedtracks|track|date']['data'][0] ;

        //Skroc URL
        $sh_url = 'http://is.gd/api.php?longurl='.$last_url;
        $short_url = file_get_contents($sh_url);

        //Wiadomosc
        $this -> message = 'Last.fm: '.$last_artist.' - '.$last_track.' '.$short_url ;

        //Pierwszy raz ?
        if(file_exists($this -> tmp_fn))
        {

            $fh = fopen($this -> tmp_fn, 'r') or die("Can't open file");
            $tmp_data = fread($fh, filesize($this -> tmp_fn));
            fclose($fh);

            if($tmp_data != $last_url)
            {
                $this -> post();

                $fh = fopen($this -> tmp_fn, 'w+') or die("Can't open file");
                fwrite($fh, $last_url);
                fclose($fh);
            }
            else
            echo 'Bez zmian';
        }
        //Pliku nie ma, pierwsze odpalenie
        else
        {
            $this -> post();

            $fh = fopen($this -> tmp_fn, 'w+') or die("Can't open file");
            fwrite($fh, $last_url);
            fclose($fh);
            echo 'First Run';
        }
    }
}
?>