<?php
/**
* HTML parsing for the linksys router HTML pages
*
* PHP version 5
*
* @category Tools
* @package  linksys-wrt3g-tools
* @author   Christian Weiske <cweiske@cweiske.de>
* @license  AGPL v3
* @link     http://cweiske.de/linksys-wrt3g-tools.htm
*/
class Wrt3g_HtmlParser
{
    protected static $arTranslations = array(
        'GPRS_MSG.WWBEAR'      => 'type',
        'GPRS_MSG.NNAME'       => 'network',
        'GPRS_MSG.STRENGTH'    => 'signal strength',
        'GPRS_MSG.ACQUIRING'   => 'aquiring',
        'GPRS_MSG.WWBEAR_GPRS' => 'GPRS',
        'GPRS_MSG.WWBEAR_UMTS' => 'UMTS',
        'GPRS_MSG.GOOD'        => 'good',
        'GPRS_MSG.EXCELLENT'   => 'excellent',
    );


    /**
    * Parses the body of /index_wstatus1.asp and returns extracted values.
    *
    * @param string $body HTML document to parse
    *
    * @return array Array of key-value pairs
    */
    public function index_wstatus1($body)
    {
        $doc = new DomDocument();
        $doc->loadHtml($body);
		$xpath = new DOMXPath($doc);
		$entries = $xpath->query('//table/tr/td');

        $arMatches = array();
		foreach ($entries as $entry) {
            $s = $doc->saveXML($entry);
            $s = str_replace(
                array('<![CDATA[', ']]>'),
                '', $s
            );
            $s = strip_tags($s);
            //some strange utf8 space char
            $s = str_replace("\xC2\xA0", ' ', $s);
            $s = trim($s);
            $s = str_replace(
                array('Capture(', ') :'),
                '', $s
            );
            if (substr($s, -1) == ')') {
                $s = substr($s, 0, -1);
            }
            $arMatches[] = $s;
        }


        $arRetval = array();
        $arData = array();
        reset($arMatches);
        while (current($arMatches)) {
            $key   = current($arMatches);
            $value = next($arMatches);
            if (isset(self::$arTranslations[$key])) {
                $key = self::$arTranslations[$key];
            }
            if (isset(self::$arTranslations[$value])) {
                $value = self::$arTranslations[$value];
            }
            $arRetval[$key] = $value;
            next($arMatches);
        }

        return $arRetval;
    }


    /**
    * Parses the body of /index_wstatus2.asp and returns extracted values.
    *
    * @param string $body HTML document to parse
    *
    * @return array Array with "connection" as key and one of "connecting",
    *               "connected" or "disconnected" as value.
    */
    public function index_wstatus2($body)
    {
        preg_match('/var status2 = "(.+)"/', $body, $arMatches);

        $strStatus = $arMatches[1];
        //Connecting
        //Disconnected
        //Connected
        return array('connection' => strtolower($strStatus));
    }
}