add constructor property promotion

add return type of methods

lib/Service/CategoryRepository.php

@@ -15,51 +15,19 @@ use OCP\L10N\IFactory;
  */
 class CategoryRepository
 {
-    /**
-     * @var CategoryFetcher
-     */
-    protected $categoryFetcher;
-
-    /**
-     * @var IFactory
-     */
-    protected $l10nFactory;
-
-    /**
-     * @var ConfigProxy
-     */
-    protected $config;
-
-    /**
-     * @var IConfig
-     */
-    protected $iConfig;
-
-    /**
-     * @var IUserSession
-     */
-    protected $userSession;
-
     public function __construct(
-        CategoryFetcher $categoryFetcher,
-        ConfigProxy $config,
-        IConfig $iConfig,
-        IFactory $l10nFactory,
-        IUserSession $userSession
+        protected CategoryFetcher $categoryFetcher,
+        protected ConfigProxy $config,
+        protected IConfig $iConfig,
+        protected IFactory $l10nFactory,
+        protected IUserSession $userSession
     ) {
-        $this->categoryFetcher = $categoryFetcher;
-        $this->l10nFactory = $l10nFactory;
-        $this->config = $config;
-        $this->iConfig = $iConfig;
-        $this->userSession = $userSession;
     }
 
     /**
      * Retrieves categories.
-     *
-     * @return array
      */
-    public function getOrderedCategories()
+    public function getOrderedCategories(): array
     {
         $currentLanguage = substr($this->l10nFactory->findLanguage(), 0, 2);
         $type = $this->config->getAppValue('categories-order-type', 'default');