feat: add likes to posts

app/Http/Controllers/MealPostController.php

@@ -9,6 +9,7 @@ use App\Http\Resources\MealPostsResource;
 use App\Models\MealPosts;
 use Carbon\CarbonImmutable;
 use Carbon\CarbonInterface;
+use Illuminate\Database\Eloquent\Builder;
 use Illuminate\Http\JsonResponse;
 use Illuminate\Http\Request;
 use Illuminate\Http\Resources\Json\AnonymousResourceCollection;
@@ -24,6 +25,10 @@ class MealPostController extends Controller
 
         $mealPosts = MealPosts::query()
             ->with('user:id,name,avatar_url')
+            ->withCount('likedByUsers')
+            ->withExists([
+                'likedByUsers as liked_by_current_user' => fn (Builder $query): Builder => $query->whereKey($request->user()->getKey()),
+            ])
             ->latest('eaten_at')
             ->paginate($perPage)
             ->withQueryString();
@@ -116,17 +121,15 @@ class MealPostController extends Controller
         });
 
         $mealPost->setRelation('user', $request->user());
-        $mealPost->loadMissing('ingredients');
 
-        return (new MealPostsResource($mealPost))
+        return (new MealPostsResource($this->loadMealPostForResponse($mealPost, $request)))
             ->response()
             ->setStatusCode(201);
     }
 
     public function show(Request $request, MealPosts $mealPost): MealPostsResource
     {
-
-        return new MealPostsResource($mealPost->loadMissing('user:id,name,avatar_url', 'ingredients'));
+        return new MealPostsResource($this->loadMealPostForResponse($mealPost, $request));
     }
 
     public function update(MealPostsRequest $request, MealPosts $mealPost): MealPostsResource
@@ -155,7 +158,21 @@ class MealPostController extends Controller
             return $mealPost->refresh();
         });
 
-        return new MealPostsResource($mealPost->loadMissing('user:id,name,avatar_url', 'ingredients'));
+        return new MealPostsResource($this->loadMealPostForResponse($mealPost, $request));
+    }
+
+    public function like(Request $request, MealPosts $mealPost): MealPostsResource
+    {
+        $mealPost->likedByUsers()->syncWithoutDetaching([$request->user()->getKey()]);
+
+        return new MealPostsResource($this->loadMealPostForResponse($mealPost, $request));
+    }
+
+    public function unlike(Request $request, MealPosts $mealPost): MealPostsResource
+    {
+        $mealPost->likedByUsers()->detach($request->user()->getKey());
+
+        return new MealPostsResource($this->loadMealPostForResponse($mealPost, $request));
     }
 
     public function destroy(Request $request, MealPosts $mealPost): Response
@@ -173,6 +190,16 @@ class MealPostController extends Controller
         abort_unless($mealPost->user_id === $request->user()->getKey(), 404);
     }
 
+    private function loadMealPostForResponse(MealPosts $mealPost, Request $request): MealPosts
+    {
+        return $mealPost
+            ->loadMissing('user:id,name,avatar_url', 'ingredients')
+            ->loadCount('likedByUsers')
+            ->loadExists([
+                'likedByUsers as liked_by_current_user' => fn (Builder $query): Builder => $query->whereKey($request->user()->getKey()),
+            ]);
+    }
+
     private function getValidatedDataWithImageUrl(MealPostsRequest $request): array
     {
         $data = $request->validated();