feat: add multi-language support

Classes/Domain/Model/Document.php

@@ -20,6 +20,7 @@ class Document extends AbstractDomainObject
     protected string $content = '';
     protected string $type = '';
     protected array $_formatted = [];
+    protected int $languageId = 0;
 
     public function getId(): string
     {
@@ -91,6 +92,16 @@ public function setType(string $type): void
         $this->type = strtolower($type);
     }
 
+    public function getLanguageId(): int
+    {
+        return $this->languageId;
+    }
+
+    public function setLanguageId(int $languageId): void
+    {
+        $this->languageId = $languageId;
+    }
+
     public function setFormatted(array $_formatted): void
     {
         if ($_formatted['content']) {
@@ -127,6 +138,7 @@ public static function createFromTSFE(TypoScriptFrontendController $tsfe): Docum
         $document->setTitle($tsfe->page['title'] ?? '');
         $document->setUrl($url);
         $document->setCrdate($tsfe->page['crdate']);
+        $document->setLanguageId($tsfe->getLanguage()->getLanguageId() ?? 0);
 
         return $document;
     }
@@ -141,6 +153,7 @@ public function toArray(): array
             'url' => $this->url,
             'content' => $this->content,
             'type' => $this->type,
+            'languageId' => $this->languageId,
         ];
     }
 }

Classes/Service/IndexService.php

@@ -33,7 +33,7 @@ public function __construct()
         try {
             if ($this->client->isHealthy()) {
                 $this->client->index($this->index)->updateSettings([
-                    'filterableAttributes' => ['rootPageId', 'type'],
+                    'filterableAttributes' => ['rootPageId', 'type', 'languageId'],
                     'sortableAttributes' => ['crdate'],
                 ]);
             }
@@ -106,6 +106,7 @@ public function checkForFiles(TypoScriptFrontendController $tsfe)
             $document->setContent($content);
             $document->setType('pdf');
             $document->setCrdate(filemtime($absolutePath));
+            $document->setLanguageId(-1);
 
             $this->add($document);
         }

Classes/Service/SearchService.php

@@ -46,6 +46,7 @@ public function search(string $query, string $sorting = 'crdate_desc', array $ty
             // Filter by checking the rootPageId is in the rootline
             'filter' => [
                 'rootPageId = ' . $GLOBALS['TSFE']->getSite()->getRootPageId(),
+                'languageId IN [-1,' . $GLOBALS['TSFE']->getLanguage()->getLanguageId() . ']',
                 $typesFilter,
             ],
         ]);