class.ilAsqService.php

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<?php

class ilAsqService
{
    public function fetchNextAuthoringCommandClass($nextClass): string
    {
        global $DIC; /* @var ILIAS\DI\Container $DIC */

        $row = $DIC->database()->fetchAssoc($DIC->database()->queryF(
            "SELECT COUNT(question_type_id) cnt FROM qpl_qst_type WHERE ctrl_class = %s",
            array('text'),
            array($nextClass)
        ));

        if ($row['cnt']) {
            // current next class is indeed an authoring ctrl class,
            // return it to have the switch(nextclass) case matching
            return $nextClass;
        }

        // the interface that NOT represents a valid ctrl class,
        // this will lead to a non matching switch(nextclass) case
        return 'ilasqquestionauthoring';
    }

    public function determineQuestionTypeByQtiItem(ilQTIItem $qtiItem): string
    {
        // the qti service parses ILIAS question types, so use it
        // although this may get changed in the future
        return $qtiItem->getQuestiontype();
    }

    public function questionTitleExists($parentObjectId, $questionTitle): bool
    {
        global $DIC; /* @var ILIAS\DI\Container $DIC */

        $row = $DIC->database()->fetchAssoc($DIC->database()->queryF(
            "SELECT COUNT(question_id) cnt FROM qpl_questions WHERE obj_fi = %s AND title = %s",
            array('integer', 'text'),
            array($parentObjectId, $questionTitle)
        ));

        return $row['cnt'] > 0;
    }
}