/**
* Creates a list item for one datasource.
*
* @param \Drupal\search_api\Datasource\DatasourceInterface|null $datasource
* The datasource, or NULL for general properties.
*
* @return array
* A render array representing the given datasource and, possibly, its
* attached properties.
*/
protected function getDatasourceListItem(DatasourceInterface $datasource = NULL)
{
$item = array('#type' => 'container', '#attributes' => array('class' => array('container-inline')));
$active = FALSE;
$datasource_id = $datasource ? $datasource->getPluginId() : '';
$active_datasource = $this->getParameter('datasource');
if (isset($active_datasource)) {
$active = $active_datasource == $datasource_id;
}
$url = $this->entity->toUrl('add-fields');
if ($active) {
$expand_link = array('#type' => 'link', '#title' => '(-) ', '#url' => $url);
} else {
$url->setOption('query', array('datasource' => $datasource_id));
$expand_link = array('#type' => 'link', '#title' => '(+) ', '#url' => $url);
}
$item['expand_link'] = $expand_link;
$label = $datasource ? Html::escape($datasource->label()) : $this->t('General');
$item['label']['#markup'] = $label;
if ($active) {
$properties = $this->entity->getPropertyDefinitions($datasource_id ?: NULL);
if ($properties) {
$active_property_path = $this->getParameter('property_path', '');
$base_url = clone $url;
$base_url->setOption('query', array('datasource' => $datasource_id));
$item['properties'] = $this->getPropertiesList($properties, $active_property_path, $base_url);
}
}
return $item;
}
