class.ilMDXMLCopier.php

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<?php

/******************************************************************************
 *
 * This file is part of ILIAS, a powerful learning management system.
 *
 * ILIAS is licensed with the GPL-3.0, you should have received a copy
 * of said license along with the source code.
 *
 * If this is not the case or you just want to try ILIAS, you'll find
 * us at:
 * https://www.ilias.de
 * https://github.com/ILIAS-eLearning
 *
 *****************************************************************************/

declare(strict_types=1);

class ilMDXMLCopier extends ilMDSaxParser
{
    private array $filter = [];
    protected bool $in_meta_data = false;

    public function __construct($content, $a_rbac_id, $a_obj_id, $a_obj_type)
    {
        $this->setMDObject(new ilMD($a_rbac_id, $a_obj_id, $a_obj_type));

        parent::__construct();
        $this->setXMLContent($content);

        // set filter of tags which are handled in this class
        $this->__setFilter();
    }

    public function startParsing(): void
    {
        // delete existing entries from creations process
        $clone_md = $this->getMDObject();
        $clone_md->deleteAll();

        // rewrite autogenerated entry
        $identifier = new ilMDIdentifier(
            $clone_md->getRBACId(),
            $clone_md->getObjId(),
            $clone_md->getObjType(),
        );
        $identifier->setEntry('il__' . $clone_md->getObjType() . '_' . $clone_md->getObjId());
        $identifier->update();

        parent::startParsing();
    }

    public function handlerBeginTag($a_xml_parser, string $a_name, array $a_attribs): void
    {
        if ($this->in_meta_data && !$this->__inFilter($a_name)) {
            parent::handlerBeginTag($a_xml_parser, $a_name, $a_attribs);
            return;
        }

        switch ($a_name) {
            case 'MetaData':
                $this->in_meta_data = true;
                parent::handlerBeginTag($a_xml_parser, $a_name, $a_attribs);
                break;

            case 'Identifier':
                $par = $this->__getParent();
                $this->md_ide = $par->addIdentifier();
                $this->md_ide->setCatalog($a_attribs['Catalog'] ?? '');
                $this->md_ide->setEntry('il__' . $this->md->getObjType() . '_' . $this->md->getObjId());
                $this->md_ide->save();
                $this->__pushParent($this->md_ide);
                break;
        }
    }

    public function handlerEndTag($a_xml_parser, string $a_name): void
    {
        if ($this->in_meta_data && !$this->__inFilter($a_name)) {
            parent::handlerEndTag($a_xml_parser, $a_name);
            return;
        }
        switch ($a_name) {
            case 'Identifier':
                $par = $this->__getParent();
                $par->update();
                $this->__popParent();
                break;

            case 'MetaData':
                $this->in_meta_data = false;
                parent::handlerEndTag($a_xml_parser, $a_name);
                break;
        }
    }

    public function handlerCharacterData($a_xml_parser, string $a_data): void
    {
        if ($this->in_meta_data) {
            parent::handlerCharacterData($a_xml_parser, $a_data);
        }
    }

    public function __setFilter(): void
    {
        $this->filter[] = 'Identifier';
    }

    public function __inFilter(string $a_tag_name): bool
    {
        return in_array($a_tag_name, $this->filter, true);
    }
}