News creation: Show error on duplicates

resources/lang/de_DE/additional.po

@@ -80,6 +80,9 @@ msgstr "Kommentar gespeichert."
 msgid "news.comment-delete.success"
 msgstr "Kommentar erfolgreich gelöscht."
 
+msgid "news.edit.duplicate"
+msgstr "Diese News wurde bereits erstellt."
+
 msgid "news.edit.success"
 msgstr "News erfolgreich aktualisiert."
 

resources/lang/en_US/additional.po

@@ -78,6 +78,9 @@ msgstr "Comment saved."
 msgid "news.comment-delete.success"
 msgstr "Comment successfully deleted."
 
+msgid "news.edit.duplicate"
+msgstr "Diese News wurde bereits erstellt."
+
 msgid "news.edit.success"
 msgstr "News successfully updated."
 

src/Controllers/Admin/NewsController.php

@@ -6,6 +6,7 @@ namespace Engelsystem\Controllers\Admin;
 
 use Engelsystem\Controllers\BaseController;
 use Engelsystem\Controllers\HasUserNotifications;
+use Engelsystem\Controllers\NotificationType;
 use Engelsystem\Helpers\Authenticator;
 use Engelsystem\Http\Redirector;
 use Engelsystem\Http\Request;
@@ -104,6 +105,10 @@ class NewsController extends BaseController
         }
 
         $isNewNews = !$news->id;
+        if ($isNewNews && News::where('title', $news->title)->where('text', $news->text)->count()) {
+            $this->addNotification('news.edit.duplicate', NotificationType::ERROR);
+            return $this->showEdit($news);
+        }
         $news->save();
 
         if ($isNewNews) {

tests/Unit/Controllers/Admin/NewsControllerTest.php

@@ -228,6 +228,29 @@ class NewsControllerTest extends ControllerTest
         $this->assertHasNotification('news.delete.success');
     }
 
+    /**
+     * @covers \Engelsystem\Controllers\Admin\NewsController::save
+     */
+    public function testSaveDuplicated(): void
+    {
+        $previousNews = News::first();
+        $this->request = $this->request->withParsedBody([
+            'title'  => $previousNews->title,
+            'text'   => $previousNews->text,
+        ]);
+        $this->response->expects($this->once())
+            ->method('withView')
+            ->willReturn($this->response);
+
+        /** @var NewsController $controller */
+        $controller = $this->app->make(NewsController::class);
+        $controller->setValidator(new Validator());
+
+        $controller->save($this->request);
+
+        $this->assertHasNotification('news.edit.duplicate', NotificationType::ERROR);
+    }
+
     /**
      * Creates a new user
      */