<?php

namespace Providers;

require_once('XmlFeed.php');
require_once('../lib/querypath/src/qp.php');

abstract class HtmlFeed extends \Providers\XmlFeed {

    const HTML_FEED_USER_AGENT = 'Mozilla/5.0 (Windows; U; Windows NT 6.0; en-US; rv:1.9.0.11) Gecko/2009060215 Firefox/3.0.11 (.NET CLR 3.5.30729)';

    private $_encoding;

    private function __getHttpContent($feedUrl) {
        $header = array();
        $header[] = 'Accept: text/xml,application/xml,application/xhtml+xml,text/html;q=0.9,text/plain;q=0.8,image/png,*/*;q=0.5';
        $header[] = 'Cache-Control: max-age=0';
        $header[] = 'Connection: keep-alive';
        $header[] = 'Keep-Alive: 300';
        $header[] = 'Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7';
        $header[] = 'Pragma: ';
        $ch = curl_init($feedUrl);
        curl_setopt($ch, CURLOPT_USERAGENT, self::HTML_FEED_USER_AGENT);
        curl_setopt($ch, CURLOPT_HTTPHEADER, $header);
        curl_setopt($ch, CURLOPT_AUTOREFERER, TRUE);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
        curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
        curl_setopt($ch, CURLOPT_ENCODING, '');
        curl_setopt($ch, CURLOPT_TIMEOUT, 20);
        $page = curl_exec($ch);
        curl_close ($ch);
        $this->_encoding = mb_detect_encoding($page);
        return $page;
    }

    protected function _fetchItems() {
        $page = $this->__getHttpContent($this->_feedUrl);
        $this->_feedXml = htmlqp($page, NULL, ['convert_from_encoding' => $this->_encoding, 'convert_to_encoding' => $this->_encoding]);
        return $this->_parseFeedContent($this->_feedXml);
    }

}

?>