class.ilQuestionpoolExport.php

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<?php
 
class ilQuestionpoolExport
{
    public ilErrorHandling $err;                        // error object
    public ilDBInterface $db;                   // database object
    public ILIAS $ilias;                        // ilias object
    public string $inst_id;             // installation id
    public ilLanguage $lng;
 
    private string $export_dir = '';
    private string $subdir = '';
    private string $filename = '';
    private string $zipfilename = '';
    private string $qti_filename = '';
    private ilXmlWriter $xml;
 
    public function __construct(
        protected ilObjQuestionPool $qpl_obj,
        protected string $mode = "xml",
        protected ?array $questions = null
    ) {
        global $DIC;
        $this->err = $DIC['ilErr'];
        $this->db = $DIC['ilDB'];
        $this->ilias = $DIC['ilias'];
        $this->lng = $DIC['lng'];
 
        if (!is_array($this->questions)) {
            $this->questions = $this->qpl_obj->getAllQuestionIds();
        }
 
        $this->inst_id = IL_INST_ID;
        $date = time();
 
        $this->qpl_obj->createExportDirectory();
        switch ($this->mode) {
            case "xml":
                $this->export_dir = $this->qpl_obj->getExportDirectory('xml');
                $this->subdir = $date . "__" . $this->inst_id . "__" .
                    "qpl" . "_" . $this->qpl_obj->getId();
                $this->filename = $this->subdir . ".xml";
                $this->qti_filename = $date . "__" . $this->inst_id . "__" .
                    "qti" . "_" . $this->qpl_obj->getId() . ".xml";
                break;
            case "xlsx":
                $this->export_dir = $this->qpl_obj->getExportDirectory('xlsx');
                $this->filename = $date . "__" . $this->inst_id . "__" .
                    "qpl" . "_" . $this->qpl_obj->getId() . ".xlsx";
                $this->zipfilename = $date . "__" . $this->inst_id . "__" .
                    "qpl" . "_" . $this->qpl_obj->getId() . ".zip";
                break;
            default:
                $this->export_dir = $this->qpl_obj->getExportDirectory('zip');
                $this->subdir = $date . "__" . $this->inst_id . "__" .
                    "qpl" . "_" . $this->qpl_obj->getId();
                $this->filename = $this->subdir . ".xml";
                $this->qti_filename = $date . "__" . $this->inst_id . "__" .
                    "qti" . "_" . $this->qpl_obj->getId() . ".xml";
                break;
        }
    }
 
    public function getInstId()
    {
        return $this->inst_id;
    }
 
 
    public function buildExportFile(): string
    {
        switch ($this->mode) {
            case "xlsx":
                return $this->buildExportFileXLSX();
            case "xml":
            default:
                return $this->buildExportFileXML();
        }
    }
 
    public function buildExportFileXML(): string
    {
        global $DIC;
        $ilBench = $DIC['ilBench'];
 
        $ilBench->start("QuestionpoolExport", "buildExportFile");
 
        $this->xml = new ilXmlWriter();
        $this->xml->xmlSetDtdDef("<!DOCTYPE Test SYSTEM \"http://www.ilias.uni-koeln.de/download/dtd/ilias_co.dtd\">");
        $this->xml->xmlSetGenCmt("Export of ILIAS Test Questionpool " .
            $this->qpl_obj->getId() . " of installation " . $this->inst_id);
        $this->xml->xmlHeader();
 
        ilFileUtils::makeDir($this->export_dir . "/" . $this->subdir);
        ilFileUtils::makeDir($this->export_dir . "/" . $this->subdir . "/objects");
 
        $expDir = $this->qpl_obj->getExportDirectory();
        ilFileUtils::makeDirParents($expDir);
 
        $expLog = new ilLog($expDir, "export.log");
        $expLog->delete();
        $expLog->setLogFormat("");
        $expLog->write(date("[y-m-d H:i:s] ") . "Start Export");
 
        $qti_file = fopen($this->export_dir . "/" . $this->subdir . "/" . $this->qti_filename, "w");
        fwrite($qti_file, $this->qpl_obj->questionsToXML($this->questions));
        fclose($qti_file);
 
        $ilBench->start("QuestionpoolExport", "buildExportFile_getXML");
        $this->qpl_obj->objectToXmlWriter(
            $this->xml,
            $this->inst_id,
            $this->export_dir . "/" . $this->subdir,
            $expLog,
            $this->questions
        );
        $ilBench->stop("QuestionpoolExport", "buildExportFile_getXML");
 
        $ilBench->start("QuestionpoolExport", "buildExportFile_dumpToFile");
        $this->xml->xmlDumpFile($this->export_dir . "/" . $this->subdir . "/" . $this->filename, false);
        $ilBench->stop("QuestionpoolExport", "buildExportFile_dumpToFile");
 
        $ilBench->start("QuestionpoolExport", "buildExportFile_saveAdditionalMobs");
        $this->exportXHTMLMediaObjects($this->export_dir . "/" . $this->subdir);
        $ilBench->stop("QuestionpoolExport", "buildExportFile_saveAdditionalMobs");
 
        $ilBench->start("QuestionpoolExport", "buildExportFile_zipFile");
        ilFileUtils::zip($this->export_dir . "/" . $this->subdir, $this->export_dir . "/" . $this->subdir . ".zip");
 
        $ilBench->stop("QuestionpoolExport", "buildExportFile_zipFile");
 
        $expLog->write(date("[y-m-d H:i:s] ") . "Finished Export");
        $ilBench->stop("QuestionpoolExport", "buildExportFile");
 
        return $this->export_dir . "/" . $this->subdir . ".zip";
    }
 
    public function exportXHTMLMediaObjects($a_export_dir): void
    {
        foreach ($this->questions as $question_id) {
            $mobs = ilObjMediaObject::_getMobsOfObject("qpl:html", $question_id);
            foreach ($mobs as $mob) {
                if (ilObjMediaObject::_exists($mob)) {
                    $mob_obj = new ilObjMediaObject($mob);
                    $mob_obj->exportFiles($a_export_dir);
                    unset($mob_obj);
                }
            }
        }
    }
}