[TASK] Filter for news categories

Classes/Controller/BackendController.php

@@ -82,7 +82,7 @@ class BackendController extends ActionController {
 		// retrieve next site root id
 		$siteRootId = Utility::getSiteRoot((int) GeneralUtility::_GP('id'));
 		$categories = Utility::getCategoriesForSiteRoot($siteRootId);
-		$news = Utility::getAllNewsByCategories($categories);
+		$news = Utility::getAllNewsByCategories($categories, $filters);
 
 		$this->view->assign('docHeader', $this->docHeaderComponent->docHeaderContent());
 		$this->view->assign('pageUid', $pageUid);

Classes/Service/Backend/Utility.php

@@ -131,18 +131,39 @@ class Utility {
 	}
 
 	/**
+	 * Get all news for the given categories (all if filter is empty)
+	 *
 	 * @param array $categories
+	 * @param array $filters
 	 * @return array
 	 * @throws \InvalidArgumentException
 	 * @throws \TYPO3\CMS\Extbase\Persistence\Exception\InvalidQueryException
 	 */
-	public static function getAllNewsByCategories(array $categories = []) {
+	public static function getAllNewsByCategories(array $categories = [], array $filters = []) {
 		$objectManager = GeneralUtility::makeInstance(ObjectManager::class);
 		/** @var NewsRepository $newsRepository */
 		$newsRepository = $objectManager->get(NewsRepository::class);
 
+		// filter by category if set
+		if (!empty($filters['filters']['categories'])) {
+			foreach ($categories as $key => $value) {
+				if (is_array($filters['filters']['categories'])) {
+					$unset = TRUE;
+					foreach($filters['filters']['categories'] as $category) {
+						if ($key == (int) $category) {
+							$unset = FALSE;
+						}
+					}
+
+					if ($unset) {
+						unset($categories[$key]);
+					}
+				}
+			}
+		}
+
 		$categoryIds = [];
-		foreach($categories as $key => $value) {
+		foreach ($categories as $key => $value) {
 			$categoryIds[] = $key;
 		}
 

Resources/Private/Partials/Backend/Filter.html

@@ -6,7 +6,7 @@
 					<f:translate key="backend.filters.category" />
 					<small><f:translate key="backend.filters.categories.description" /></small>
 				</label>
-				<f:form.select class="form-control" multiple="1" size="4" property="categories" options="{categories}" id="filter-category" />
+				<f:form.select class="form-control" multiple="1" size="4" property="filters.categories" options="{categories}" id="filter-category" />
 			</div>
 		</div>
 		<div class="col-xs-4">