<?php
/**
 * Created by PhpStorm.
 * User: Andreas
 * Date: 07.03.2017
 * Time: 12:30
 */
$filename = "/home/andauhApps/examParser/hasChanged.txt";
$filename2 = "/home/andauhApps/examParser/hasChangedOld.txt";
//$filename = "D:/Dev/xampp/htdocs/examParser/hasChanged.txt";

$feed = simplexml_load_file('http://jexam.inf.tu-dresden.de/rss.xml');

$index = 0;
$toCompare = '';
while($index < count($feed->channel[0]->item)){
    $toCompare = (string)$feed->channel[0]->item[$index]->title[0];
    if(preg_match('/Prüfungsergebnisse/', $toCompare) && preg_match('/SS 2017/', $toCompare)){
        break;
    }
    $index++;
}


$feedElement = (string) $feed->channel[0]->item[$index]->description[0];
$feedElementStripped = substr($feedElement, 0, strpos($feedElement, '<b><span style'));

$file = fopen($filename,"r+");
$fileContent = fgets($file, 10000);

file_put_contents($filename2, $fileContent);

if(strcmp($fileContent, $feedElementStripped) != 0){
    file_put_contents($filename, '');
    rewind($file);
    fwrite($file, $feedElementStripped);
    sendMyselfMail($feedElementStripped);
}
else{
    echo "isEqual, do nothing\n";
}

fclose($file);

function notify(){
    sendMyselfMail();
}

function sendMyselfMail($feedElement){
    include_once 'phpmailer/PHPMailerAutoload.php';
    $oMailer = new PHPMailer;
    $oMailer->CharSet = 'UTF-8';

    $oMailer->isSMTP();
    $oMailer->Host = 'smtp.web.de';
    $oMailer->SMTPAuth = true;
    $oMailer->Username = 'andhub_spam';
    $oMailer->Password = '********';
    $oMailer->SMTPSecure = 'tls';
    $oMailer->Port = 587;

    $oMailer->From = 'andhub_spam@web.de';
    $oMailer->FromName = 'andhub';
    $oMailer->addAddress( 'andreas.huber2@mailbox.tu-dresden.de', 'Andreas Huber' );

    $oMailer->isHTML( true );
    $oMailer->Subject = 'jExam';
    $oMailer->Body = '<h1>Änderung in XML-Feed von <a href ="https://jexam.inf.tu-dresden.de/de.jexam.web.v4.5/spring/welcome">jExam</a></h1> <h2> Eingepflegt: </h2> <p>' .$feedElement. '</p>';
    $oMailer->AltBody = strip_tags( $oMailer->Body );


    if ( !$oMailer->send() ) {

        echo 'Something\'s went wrong!\n';
        exit;

    }

    echo 'Mail sent!\n';
}


?>