class.ilFileImporter.php

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<?php
class ilFileImporter extends ilXmlImporter
{
    protected ?ilObjFile $current_obj = null;

    public function importXmlRepresentation(
        string $a_entity,
        string $a_id,
        string $a_xml,
        ilImportMapping $a_mapping
    ): void {
        // case i container
        if ($new_id = $a_mapping->getMapping('Services/Container', 'objs', $a_id)) {
            $newObj = ilObjectFactory::getInstanceByObjId($new_id, false);
            $newObj->setVersion(
                0
            ); // If $version is 0 from database, it will be set to 1 in ilObFile::doRead(). In ilFileXMLParser::handlerBeginTag $version will being increased. So its incorrectly 2. Set $version to 0 like case ii, non container
        } else {    // case ii, non container
            $newObj = new ilObjFile();
            $newObj->setNoMetaDataCreation(true); // #16545
            $newObj->create(true);
        }

        $parser = new ilFileXMLParser($newObj, $a_xml);
        $parser->setImportDirectory($this->getImportDirectory());
        $parser->startParsing();

        $newObj->createProperties();

        $parser->setFileContents();
        $this->current_obj = $newObj;

        $newObj->update();        // this is necessary for case ii (e.g. wiki import)

        $a_mapping->addMapping("Modules/File", "file", $a_id, $newObj->getId());
        $a_mapping->addMapping(
            "Services/MetaData",
            "md",
            $a_id . ":0:file",
            $newObj->getId() . ":0:file"
        );
    }
}