getClass(taoItems_models_classes_itemModel::CLASS_URI_MODELS);
$itemModels = $itemModelClass->getInstances();
foreach ($itemModels as $model) {
$impl = taoItems_models_classes_ItemsService::singleton()->getItemModelImplementation($model);
if (in_array('tao_models_classes_export_ExportProvider', class_implements($impl), true)) {
foreach ($impl->getExportHandlers() as $handler) {
array_unshift($returnValue, $handler);
}
}
}
$instances = $this->getClassInstances();
if (!count($instances)) {
$returnValue = array_filter($returnValue,
static function (tao_models_classes_export_ExportHandler $handler) {
return $handler instanceof tao_models_classes_export_RdfExporter;
});
}
return $returnValue;
}
public function getClassInstances(): array
{
$instances = [];
$classUri = $this->hasPostParameter('classUri') ? $this->getPostParameter('classUri') : '';
if ($classUri) {
$class = $this->getClass(tao_helpers_Uri::decode($classUri));
$instances = $class->getInstances(true);
}
return $instances;
}
protected function getFormFactory(
array $handlers,
tao_models_classes_export_ExportHandler $exporter,
core_kernel_classes_Resource $selectedResource,
array $formData
): tao_actions_form_Export {
$formFactory = parent::getFormFactory($handlers, $exporter, $selectedResource, $formData);
$instances = $this->getClassInstances();
if (!count($instances)) {
$formFactory->setInfoBox(__('Note: For empty classes, the RDF format
is the only available format.'));
}
return $formFactory;
}
/**
* Function returns items to export.
* Items that has no content (QTI items without qti.xml file or empty Open Web Items) will be filtered
*
* @return core_kernel_classes_Resource[] An array of items.
*/
protected function getResourcesToExport()
{
$resources = parent::getResourcesToExport();
$service = taoItems_models_classes_ItemsService::singleton();
$resources = array_filter($resources, function ($val) use ($service) {
return $service->hasItemContent($val);
});
return $resources;
}
}