class.ilDclTextRecordQueryObject.php

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<?php

class ilDclTextRecordQueryObject extends ilDclRecordQueryObject
{
    public function applyCustomSorting(ilDclBaseFieldModel $field, array $all_records, $direction = 'asc'): array
    {
        $sort_array = array();
        foreach ($all_records as $id) {
            $url_field = ilDclCache::getRecordFieldCache(new ilDclBaseRecordModel($id), $field);
            $sort_array[$id] = $url_field->getSortingValue();
        }
        switch (strtolower($direction)) {
            case 'asc':
                asort($sort_array);
                break;
            case 'desc':
                arsort($sort_array);
                break;
        }

        return array_keys($sort_array);
    }
}