109 lines
3.8 KiB
PHP
109 lines
3.8 KiB
PHP
<?php
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namespace Drupal\system\Controller;
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use Drupal\Component\Utility\Crypt;
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use Drupal\Component\Utility\Tags;
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use Drupal\Core\Controller\ControllerBase;
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use Drupal\Core\Entity\EntityAutocompleteMatcher;
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use Drupal\Core\KeyValueStore\KeyValueStoreInterface;
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use Drupal\Core\Site\Settings;
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use Symfony\Component\DependencyInjection\ContainerInterface;
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use Symfony\Component\HttpFoundation\JsonResponse;
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use Symfony\Component\HttpFoundation\Request;
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use Symfony\Component\HttpKernel\Exception\AccessDeniedHttpException;
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/**
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* Defines a route controller for entity autocomplete form elements.
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*/
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class EntityAutocompleteController extends ControllerBase {
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/**
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* The autocomplete matcher for entity references.
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*
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* @var \Drupal\Core\Entity\EntityAutocompleteMatcher
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*/
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protected $matcher;
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/**
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* The key value store.
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*
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* @var \Drupal\Core\KeyValueStore\KeyValueStoreInterface
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*/
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protected $keyValue;
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/**
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* Constructs a EntityAutocompleteController object.
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*
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* @param \Drupal\Core\Entity\EntityAutocompleteMatcher $matcher
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* The autocomplete matcher for entity references.
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* @param \Drupal\Core\KeyValueStore\KeyValueStoreInterface $key_value
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* The key value factory.
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*/
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public function __construct(EntityAutocompleteMatcher $matcher, KeyValueStoreInterface $key_value) {
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$this->matcher = $matcher;
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$this->keyValue = $key_value;
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}
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/**
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* {@inheritdoc}
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*/
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public static function create(ContainerInterface $container) {
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return new static(
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$container->get('entity.autocomplete_matcher'),
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$container->get('keyvalue')->get('entity_autocomplete')
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);
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}
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/**
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* Autocomplete the label of an entity.
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*
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* @param \Symfony\Component\HttpFoundation\Request $request
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* The request object that contains the typed tags.
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* @param string $target_type
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* The ID of the target entity type.
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* @param string $selection_handler
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* The plugin ID of the entity reference selection handler.
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* @param string $selection_settings_key
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* The hashed key of the key/value entry that holds the selection handler
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* settings.
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*
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* @return \Symfony\Component\HttpFoundation\JsonResponse
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* The matched entity labels as a JSON response.
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*
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* @throws \Symfony\Component\HttpKernel\Exception\AccessDeniedHttpException
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* Thrown if the selection settings key is not found in the key/value store
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* or if it does not match the stored data.
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*/
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public function handleAutocomplete(Request $request, $target_type, $selection_handler, $selection_settings_key) {
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$matches = [];
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// Get the typed string from the URL, if it exists.
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if ($input = $request->query->get('q')) {
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$typed_string = Tags::explode($input);
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$typed_string = mb_strtolower(array_pop($typed_string));
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// Selection settings are passed in as a hashed key of a serialized array
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// stored in the key/value store.
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$selection_settings = $this->keyValue->get($selection_settings_key, FALSE);
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if ($selection_settings !== FALSE) {
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$selection_settings_hash = Crypt::hmacBase64(serialize($selection_settings) . $target_type . $selection_handler, Settings::getHashSalt());
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if (!Crypt::hashEquals($selection_settings_hash, $selection_settings_key)) {
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// Disallow access when the selection settings hash does not match the
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// passed-in key.
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throw new AccessDeniedHttpException('Invalid selection settings key.');
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}
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}
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else {
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// Disallow access when the selection settings key is not found in the
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// key/value store.
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throw new AccessDeniedHttpException();
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}
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$matches = $this->matcher->getMatches($target_type, $selection_handler, $selection_settings, $typed_string);
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}
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return new JsonResponse($matches);
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}
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}
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