Chris@0: <?php
Chris@0: 
Chris@0: namespace Drupal\system;
Chris@0: 
Chris@0: use Drupal\Component\Transliteration\TransliterationInterface;
Chris@0: use Drupal\Core\Access\CsrfTokenGenerator;
Chris@0: use Drupal\Core\DependencyInjection\ContainerInjectionInterface;
Chris@0: use Symfony\Component\HttpFoundation\JsonResponse;
Chris@0: use Symfony\Component\HttpFoundation\Request;
Chris@0: use Symfony\Component\HttpKernel\Exception\AccessDeniedHttpException;
Chris@0: use Symfony\Component\DependencyInjection\ContainerInterface;
Chris@0: 
Chris@0: /**
Chris@0:  * Controller routines for machine name transliteration routes.
Chris@0:  */
Chris@0: class MachineNameController implements ContainerInjectionInterface {
Chris@0: 
Chris@0:   /**
Chris@0:    * The transliteration helper.
Chris@0:    *
Chris@0:    * @var \Drupal\Component\Transliteration\TransliterationInterface
Chris@0:    */
Chris@0:   protected $transliteration;
Chris@0: 
Chris@0:   /**
Chris@0:    * The token generator.
Chris@0:    *
Chris@0:    * @var \Drupal\Core\Access\CsrfTokenGenerator
Chris@0:    */
Chris@0:   protected $tokenGenerator;
Chris@0: 
Chris@0:   /**
Chris@0:    * Constructs a MachineNameController object.
Chris@0:    *
Chris@0:    * @param \Drupal\Component\Transliteration\TransliterationInterface $transliteration
Chris@0:    *   The transliteration helper.
Chris@0:    * @param \Drupal\Core\Access\CsrfTokenGenerator $token_generator
Chris@0:    *   The token generator.
Chris@0:    */
Chris@0:   public function __construct(TransliterationInterface $transliteration, CsrfTokenGenerator $token_generator) {
Chris@0:     $this->transliteration = $transliteration;
Chris@0:     $this->tokenGenerator = $token_generator;
Chris@0:   }
Chris@0: 
Chris@0:   /**
Chris@0:    * {@inheritdoc}
Chris@0:    */
Chris@0:   public static function create(ContainerInterface $container) {
Chris@0:     return new static(
Chris@0:       $container->get('transliteration'),
Chris@0:       $container->get('csrf_token')
Chris@0:     );
Chris@0:   }
Chris@0: 
Chris@0:   /**
Chris@0:    * Transliterates a string in given language. Various postprocessing possible.
Chris@0:    *
Chris@0:    * @param \Symfony\Component\HttpFoundation\Request $request
Chris@0:    *   The input string and language for the transliteration.
Chris@0:    *   Optionally may contain the replace_pattern, replace, lowercase parameters.
Chris@0:    *
Chris@0:    * @return \Symfony\Component\HttpFoundation\JsonResponse
Chris@0:    *   The transliterated string.
Chris@0:    */
Chris@0:   public function transliterate(Request $request) {
Chris@0:     $text = $request->query->get('text');
Chris@0:     $langcode = $request->query->get('langcode');
Chris@0:     $replace_pattern = $request->query->get('replace_pattern');
Chris@0:     $replace_token = $request->query->get('replace_token');
Chris@0:     $replace = $request->query->get('replace');
Chris@0:     $lowercase = $request->query->get('lowercase');
Chris@0: 
Chris@0:     $transliterated = $this->transliteration->transliterate($text, $langcode, '_');
Chris@0:     if ($lowercase) {
Chris@17:       $transliterated = mb_strtolower($transliterated);
Chris@0:     }
Chris@0: 
Chris@0:     if (isset($replace_pattern) && isset($replace)) {
Chris@0:       if (!isset($replace_token)) {
Chris@0:         throw new AccessDeniedHttpException("Missing 'replace_token' query parameter.");
Chris@0:       }
Chris@0:       elseif (!$this->tokenGenerator->validate($replace_token, $replace_pattern)) {
Chris@0:         throw new AccessDeniedHttpException("Invalid 'replace_token' query parameter.");
Chris@0:       }
Chris@0: 
Chris@0:       // Quote the pattern delimiter and remove null characters to avoid the e
Chris@0:       // or other modifiers being injected.
Chris@0:       $transliterated = preg_replace('@' . strtr($replace_pattern, ['@' => '\@', chr(0) => '']) . '@', $replace, $transliterated);
Chris@0:     }
Chris@0:     return new JsonResponse($transliterated);
Chris@0:   }
Chris@0: 
Chris@0: }