/**
* Presents a list of blocks to add to the variant.
*
* @param \Symfony\Component\HttpFoundation\Request $request
* The current request.
* @param \Drupal\page_manager\PageVariantInterface $page_variant
* The page entity.
*
* @return array
* The block selection page.
*/
public function selectBlock(Request $request, PageVariantInterface $page_variant)
{
// Add a section containing the available blocks to be added to the variant.
$build = ['#type' => 'container', '#attached' => ['library' => ['core/drupal.ajax']]];
$available_plugins = $this->blockManager->getDefinitionsForContexts($page_variant->getContexts());
// Order by category, and then by admin label.
$available_plugins = $this->blockManager->getSortedDefinitions($available_plugins);
foreach ($available_plugins as $plugin_id => $plugin_definition) {
// Make a section for each region.
$category = $plugin_definition['category'];
$category_key = 'category-' . $category;
if (!isset($build[$category_key])) {
$build[$category_key] = ['#type' => 'fieldgroup', '#title' => $category, 'content' => ['#theme' => 'links']];
}
// Add a link for each available block within each region.
$build[$category_key]['content']['#links'][$plugin_id] = ['title' => $plugin_definition['admin_label'], 'url' => Url::fromRoute('page_manager.variant_add_block', ['page' => $page_variant->get('page'), 'page_variant' => $page_variant->id(), 'block_id' => $plugin_id, 'region' => $request->query->get('region')]), 'attributes' => $this->getAjaxAttributes()];
}
return $build;
}
/**
* {@inheritdoc}
*/
public function getCancelUrl()
{
return new Url('entity.page.edit_form', ['page' => $this->entity->get('page')]);
}
