<?php

/**
 * @param $obj
 * @return array
 */
function addObjectElementsToArray($obj)
{
    $arrAllFile = array();
    foreach ($obj->children() as $child) {
        $arrAllFile[] = $child;

    }
    return $arrAllFile;
}

/**
 * @param $obj1
 * @param $obj2
 * @return array
 */
function getDifference ($obj1, $obj2)
{
    $arrDiff = array();

    if (json_encode($obj1['id']) != json_encode($obj2['id'])) {
        if (isset($arrDiff['Catalog']) && !is_array($arrDiff['Catalog'])) {
            $arrDiff['Catalog'] = array();
        }
        $arrDiff['Catalog']['f1-id'] = $obj1['id'];
        $arrDiff['Catalog']['f2-id'] = $obj2['id'];
    }

    //check version
    if (json_encode($obj1['version']) != json_encode($obj2['version'])) {
        if (isset($arrDiff['Catalog']) && !is_array($arrDiff['Catalog'])) {
            $arrDiff['Catalog'] = array();
        }
        $arrDiff['Catalog']['f1-version'] = $obj1['version'];
        $arrDiff['Catalog']['f2-version'] = $obj2['version'];
    }
    $c = count($obj1->children());

    // prüf parameter
    for ($j = 0; $j <= $c; $j++) {
        if (isset($arrDiff['Parameter']) && !is_array($arrDiff['Parameter'])) {
            $arrDiff['Parameter'] = array();
        }

        if(json_encode($obj1->children()[$j]['name']) != json_encode($obj2->children()[$j]['name'])) {
            $arrDiff['Parameter']['f1-name-'.$j] = $obj1->children()[$j]['name'];
            $arrDiff['Parameter']['f2-name-'.$j] = $obj2->children()[$j]['name'];
        }

        if(json_encode($obj1->children()[$j]['value']) != json_encode($obj2->children()[$j]['value'])) {
            $arrDiff['Parameter']['f1-value-'.$j] = $obj1->children()[$j]['value'];
            $arrDiff['Parameter']['f2-value-'.$j] = $obj2->children()[$j]['value'];
        }
    }

    if (empty($arrDiff['Catalog']) && empty($arrDiff['Parameter'])) {
        return [];
    }

    return $arrDiff;
}




$arrFile1 =simplexml_load_file("default_sysdumpdev_150319.txt") or die("Error: Cannot create object");
$arrFile2 =simplexml_load_file("d100spuptl25e0_sysdumpdev.txt") or die("Error: Cannot create object");


$arrAllFile1 = addObjectElementsToArray ($arrFile1);
$arrAllFile2 = addObjectElementsToArray ($arrFile2);


$arrDifferences = array();
if (count($arrAllFile1) != count($arrAllFile2)) {
    $arrDifferences['differentSize'] =  "Die Anzahl der Elemente in beide Dateien Stimmen nicht überein";
    //exit
} else if (count($arrAllFile1 != count($arrAllFile2))) {
    //loop and compare step step by step
    $arrDifferenceList = array();
    for ($i = 0; $i < count($arrAllFile1); $i++) {
        if (json_encode($arrAllFile1[$i]) != json_encode($arrAllFile2[$i])) {
            //pruf jeder element des nicht gleiche obj element
            $diff = getDifference($arrAllFile1[$i], $arrAllFile2[$i]);
            if (!empty($diff)) {
                $arrDifferenceList[] = $diff;
            }
        }
    }

    echo "<pre>";
    $arrDifferences['differences'] = $arrDifferenceList;
}


// Schreibe die unterschieden in eine result Datei
$content = '';
if (isset($arrDifferences['differentSize'])) {
    $content = $arrDifferences['differentSize'] . '\n';
}

if (isset($arrDifferences['differences'])) {
    print_r($arrDifferences);
    foreach ($arrDifferences['differences'] as $diff) {
        foreach($diff as $key => $arr) {
            if ($key == 'Catalog') {
                $content .= 'CATALOG:' . PHP_EOL;
                foreach ($arr as $key => $value) {
                    $content .= $key . ' = '.$value . PHP_EOL;
                }
            }

            if ($key == 'Parameter') {
                $content .= PHP_EOL . 'PARAMETER:' . PHP_EOL;
                foreach ($arr as $key => $value) {
                    $content .= $key . ' = '.$value . PHP_EOL;
                }
            }
        }
    }

}

if ($content == '') {
    $content = 'Es git keine Unterschied in Beide Dateien';
}
// erstellt die datei result.txt oder lösche die inhalte der bereit existierende
$file = fopen("result.txt","w+");
fwrite($file,$content ,strlen($content));
fclose($file);