/**
* Add XML archive
*
* @param array selection array: key is ref_id, value is "last_file", "omit" or "create"
*/
function addXML($a_selection = "")
{
$this->setType($this->ARCHIVE_XML);
$this->setName(time() . '__' . $this->ilias->getSetting('inst_id') . '__crs_' . $this->course_obj->getId());
$this->setDate(time());
// Step one create folder
$this->initCourseFilesObject();
$this->course_files_obj->addArchiveSubDirectory($this->getName());
// Step two create course xml
$this->initCourseXMLWriter();
$this->course_xml_writer->start();
$this->course_files_obj->writeArchiveFile($this->course_xml_writer->getXML(), $this->getName() . '/' . $this->getName() . '.xml');
// Step three create child object xml
// add objects directory
$this->course_files_obj->addArchiveSubDirectory($this->getName() . '/objects');
$this->copied_files = array();
$this->__addZipFiles($this->course_obj->getRefId(), $a_selection);
// Step four: Write index file
include_once "./Services/Export/classes/class.ilExport.php";
ilExport::_generateIndexFile($this->course_files_obj->getArchiveDirectory() . '/' . $this->getName() . '/index.html', $this->course_obj->getId(), $this->copied_files);
// Step five zip
$this->setSize($this->course_files_obj->zipArchive($this->getName(), $this->getName() . '.zip'));
// Finally add entry in crs_archives table
$this->add();
return true;
}