Enhancing string matching with transliteration

Closes #3484939

src/Plugin/views/query/ViewsJsonQuery.php

@@ -4,6 +4,7 @@ namespace Drupal\views_json_source\Plugin\views\query;
 
 use Drupal\Component\Datetime\TimeInterface;
 use Drupal\Component\Serialization\Json;
+use Drupal\Component\Transliteration\TransliterationInterface;
 use Drupal\Component\Utility\NestedArray;
 use Drupal\Core\Cache\CacheBackendInterface;
 use Drupal\Core\Config\ConfigFactoryInterface;
@@ -123,10 +124,17 @@ class ViewsJsonQuery extends QueryPluginBase {
    */
   public $filter = [];
 
+  /**
+   * Transliteration service.
+   *
+   * @var \Drupal\Component\Transliteration\TransliterationInterface
+   */
+  protected $transliteration;
+
   /**
    * {@inheritdoc}
    */
-  public function __construct(array $configuration, $plugin_id, $plugin_definition, ConfigFactoryInterface $config, CacheBackendInterface $cache, TimeInterface $time, EventDispatcherInterface $event_dispatcher, ClientInterface $http_client, Token $token, LoggerInterface $logger) {
+  public function __construct(array $configuration, $plugin_id, $plugin_definition, ConfigFactoryInterface $config, CacheBackendInterface $cache, TimeInterface $time, EventDispatcherInterface $event_dispatcher, ClientInterface $http_client, Token $token, LoggerInterface $logger, TransliterationInterface $transliteration) {
     parent::__construct($configuration, $plugin_id, $plugin_definition);
 
     $this->config = $config;
@@ -136,6 +144,7 @@ class ViewsJsonQuery extends QueryPluginBase {
     $this->httpClient = $http_client;
     $this->token = $token;
     $this->logger = $logger;
+    $this->transliteration = $transliteration;
   }
 
   /**
@@ -152,7 +161,8 @@ class ViewsJsonQuery extends QueryPluginBase {
       $container->get('event_dispatcher'),
       $container->get('http_client'),
       $container->get('token'),
-      $container->get('logger.channel.views_json_source')
+      $container->get('logger.channel.views_json_source'),
+      $container->get('transliteration')
     );
   }
 
@@ -347,6 +357,10 @@ class ViewsJsonQuery extends QueryPluginBase {
    * Define ops for using in filter.
    */
   public function ops($op, $l, $r) {
+    // Transliterate values before comparison.
+    $l = $this->transliterateValue($l);
+    $r = $this->transliterateValue($r);
+
     $table = [
       '=' => function ($l, $r) {
         return $l == $r;
@@ -388,6 +402,13 @@ class ViewsJsonQuery extends QueryPluginBase {
     return array_key_exists($op, $table) ? call_user_func($table[$op], $l, $r) : FALSE;
   }
 
+  /**
+   * Transliterate.
+   */
+  protected function transliterateValue($value) {
+    return $this->transliteration->transliterate($value);
+  }
+
   /**
    * Parse.
    */