♻️ Factorise la suppression de tags

Pour #8

app/Http/Controllers/HomeController.php

@@ -75,10 +75,7 @@ class HomeController extends Controller
             'message' => 'required'
         ]);
 
-        $tags_to_delete = PostsTag::where('post_id', $today_post->id)->get();
-        foreach ($tags_to_delete as $tag_to_delete) {
-            $tag_to_delete->delete();
-        }
+        $today_post->deleteTags();
 
         $tags = $tag_detector->detectFrom($data['message']);
 
@@ -112,7 +109,8 @@ class HomeController extends Controller
             $today_post = Post::whereDate('date_post', '=', (new DateTime())->format('Y-m-d'))
                 ->where('user_id', Auth::user()->getAuthIdentifier())
                 ->firstOrFail();
-
+            /** @var Post $today_post */
+            $today_post->deleteTags();
             $today_post->delete();
             return Redirect::to('home')->withSuccess('Great! Your today\'s post is now deleted. You can make a new one!');
         } catch (\ErrorException $e) {