<?php

function deleteItemsDirectory($dir) {
    if ($handle = opendir($dir)) {
        $array = array();
        while (false !== ($file = readdir($handle))) {
            if ($file != "." && $file != "..") {
                if(is_dir($dir.$file)) {
                    if(!@rmdir($dir.$file)) {
                        deleteItemsDirectory($dir.$file.'/');
                    }
                } else {
                    @unlink($dir.$file);
                }
            }
        }
        closedir($handle);
        @rmdir($dir);
    }
}

function extractFile($file, $dir) {
    $tmp_file = $file['tmp_name'];
    if (is_uploaded_file($tmp_file)) {
        $zip = new ZipArchive;
        $res = $zip->open($tmp_file);
        if ($res === TRUE) {
            $zip->extractTo($dir);
            $zip->close();
            //$result = $this->readZipContents();
            return $result;
        }
    }
    return false;
}

function readZipContents($dir) {
    if ($handle = opendir($dir)) {
        $this->setManifestFile();
        if ($this->manifest_dom) {
            $result = $this->readManifestFile();
        }
        if (is_dir($dir)) {
            $this->delete_directory($dir);
        }
        return $result;
    }
    return false;
}

function getManifestFileDOM($dir) {
    if ($handle = opendir($dir)) {
        while (false !== ($f = readdir($handle))) {
            if (!substr_compare($f, ".xml", -4, 4)) {
                $fc = file_get_contents($dir."/".$f);
                if (!empty($fc)) {
                    $manifest = isManifestFile($fc);
                    if ($manifest) {
                        return $manifest;
                        break;
                    }
                }
            }
        }
        closedir($handle);
    } 
}

function isManifestFile($xml) {
    $dom = new DOMDocument();
    $dom->loadXML($xml);
    $dom->preserveWhiteSpace = false;
    $dom->normalizeDocument();
    $manifest = $dom->getElementsByTagName("manifest");
    if ($manifest->length != 0) {
        return $dom;
    }
    return false;
}

function readManifestFile($dir, $manifest_dom) {
    $success = true;
    $resources = $manifest_dom->getElementsByTagName("resource");
    for ($i=0; $i<$resources->length; $i++) {
        $resource = $resources->item($i);
        $item_href = $resource->getAttribute("href");
        $fc = file_get_contents($dir."/".$item_href);
        if (!empty($fc)) {
            $obj_id = readItemXML($resource, $fc);
            if (!$obj_id) {
                $success = false;
            }
        }
    }
    return $success;
}

function readItemXML($resource, $xml) {
    $dom = new DOMDocument();
    $dom->loadXML($xml);
    $dom->preserveWhiteSpace = false;
    $dom->normalizeDocument();
    $assessmentItem = $dom->getElementsByTagName("assessmentItem");
    if ($assessmentItem->length != 0) {
        $choiceInteraction = $assessmentItem->item(0)->getElementsByTagName("choiceInteraction");
        if ($choiceInteraction->length != 0) {
            importChoiceInteraction($resource, $dom);
        }
        $extendedTextInteraction = $assessmentItem->item(0)->getElementsByTagName("extendedTextInteraction");
        if ($extendedTextInteraction->length != 0) {
            createDigiMinaItemExtendedText($resource, $dom);
        }
    }
    return true;
}

function importChoiceInteraction($resource, $dom) {
    $responseDeclaration = $dom->getElementsByTagName("responseDeclaration");
    $cardinality = $responseDeclaration->item(0)->getAttribute("cardinality");
    if ($cardinality == "single") {
        createDigiMinaItemMultipleChoice($resource, $dom);
    } else if ($cardinality == "multiple") {
        createDigiMinaItemMultipleResponse($resource, $dom);
    }
    return false;
}

function createDigiMinaItemMultipleChoice($resource_dom, $item_dom) {
    $item = new DigiMinaItemMultipleChoice();
    $item->buildFromXML($resource_dom, $item_dom);
    $item->save();
}
 
function createDigiMinaItemMultipleResponse($resource_dom, $item_dom) {
    $item = new DigiMinaItemMultipleResponse();
    $item->buildFromXML($resource_dom, $item_dom);
    $item->save();
}
 
function createDigiMinaItemExtendedText($resource_dom, $item_dom) {
    $item = new DigiMinaItemExtendedText();
    $item->buildFromXML($resource_dom, $item_dom);
    $item->save();
}