Nyaa extsearch Engine

<?php

class NyaaEngine extends commonEngine
{
    public $defaults = array( "public"=>true, "page_size"=>25 );
    public $categories = array( 'All categories'=>'0_0', 'Anime'=>'1_0', 'Anime - Anime Music Video'=>'1_32', 'Anime - English-translated Anime'=>'1_37', 'Anime - Non-English-translated Anime'=>'1_38', 'Anime - Raw Anime'=>'1_11',
        'Audio'=>'3_0', 'Audio - Lossless Audio'=>'3_14', 'Audio - Lossy Audio'=>'3_15',
        'Literature'=>'2_0', 'Literature - English-translated Literature'=>'2_12', 'Literature - Non-English-translated Literature'=>'2_39', 'Literature - Raw Literature'=>'2_13',
        'Live Action'=>'5_0', 'Live Action - English-translated Live Action'=>'5_19', 'Live Action - Live Action Promotional Video'=>'5_22', 'Live Action - Non-English-translated Live Action'=>'5_21', 'Live Action - Raw Live Action'=>'5_20',
        'Pictures'=>'4_0', 'Pictures - Graphics'=>'4_18', 'Pictures - Photos'=>'4_17',
        'Software'=>'6_0', 'Software - Applications'=>'6_23', 'Software - Games'=>'6_24' );

    public function action($what,$cat,&$ret,$limit,$useGlobalCats)
    {
        $added = 0;
        $url = 'http://www.nyaa.se';
        if($useGlobalCats)
            $categories = array( 'all'=>'0_0', 'movies'=>'0_0', 'tv'=>'5_0', 'music'=>'3_0', 'games'=>'6_23', 'anime'=>'1_0', 'software'=>'6_0', 'pictures'=>'4_0', 'books'=>'2_0' );
        else
            $categories = &$this->categories;
        if(!array_key_exists($cat,$categories))
            $cat = $categories['All categories'];
        else
            $cat = $categories[$cat];

        for($pg = 1; $pg<11; $pg++)
        {
            $cli = $this->fetch( $url.'/?page=search&cats='.$cat.'&filter=0&sort=1&order=1&term='.$what.'&offset='.$pg );
            if( ($cli==false) || (strpos($cli->results, "<b>No torrents found.</b>")!==false) )
                break;
            $res = preg_match_all('`<td class="tlisticon"><a.* title="(?P<cat>.*)"><img.*</a></td>.*'.
                '<td class="tlistname"><a href="http://www.nyaa.se/\?page=view&#38;#38;tid=(?P<id>.*)">(?P<name>.*)</a></td>.*'.
                '<td class=".*">.*</td>'.
                '<td class="tlistsize">(?P<size>.*)</td>.*'.
                '(<td class="tlistsn">(?P<seeds>.*)</td><td class="tlistln">(?P<leech>.*)</td>.*|<td class="tlistfailed" colspan="2">Status unknown</td>)'.
                '<td class=".*">.*</td>.*'.
                '<td class=".*">.*</td>'.
                '`siU', $cli->results, $matches);
            if($res)
            {
                for($i=0; $i<$res; $i++)
                {
                    $link = $url."/?page=download&tid=".$matches["id"][$i];
                    if(!array_key_exists($link,$ret))
                    {
                        $item = $this->getNewEntry();
                        $item["desc"] = $url."/?page=view&tid=".$matches["id"][$i];
                        $item["name"] = self::removeTags($matches["name"][$i]);
                        $item["cat"] = self::removeTags($matches["cat"][$i]);
                        $item["size"] = self::formatSize($matches["size"][$i]);
                        $item["seeds"] = intval(self::removeTags($matches["seeds"][$i]));
                        $item["peers"] = intval(self::removeTags($matches["leech"][$i]));
                        $ret[$link] = $item;
                        $added++;
                        if($added>=$limit)
                            return;
                    }
                }
            }
            else
                break;
        }
    }
}