fix : 오류 발생시 json으로 값 전달 및 Swagger 문서 수정

app/Exceptions/Handler.php

@@ -2,7 +2,14 @@
 
 namespace App\Exceptions;
 
+use Illuminate\Auth\AuthenticationException;
 use Illuminate\Foundation\Exceptions\Handler as ExceptionHandler;
+use Illuminate\Validation\ValidationException;
+use Symfony\Component\HttpKernel\Exception\AccessDeniedHttpException;
+use Symfony\Component\HttpKernel\Exception\BadRequestHttpException;
+use Symfony\Component\HttpKernel\Exception\HttpException;
+use Symfony\Component\HttpKernel\Exception\MethodNotAllowedHttpException;
+use Symfony\Component\HttpKernel\Exception\NotFoundHttpException;
 use Throwable;
 use Illuminate\Support\Facades\Http;
 
@@ -37,4 +44,79 @@ protected function sendSlackException(Throwable $e): void
             logger()->error('슬랙 전송 실패', ['message' => $ex->getMessage()]);
         }
     }
+
+    public function render($request, Throwable $exception)
+    {
+
+        if ($request->expectsJson()) {
+            // 400 Bad Request (예: ValidationException)
+            if (
+                $exception instanceof ValidationException ||
+                $exception instanceof BadRequestHttpException
+            ) {
+                return response()->json([
+                    'success' => false,
+                    'message' => '필수 파라미터 누락',
+                    'data' => null,
+                ], 400);
+            }
+
+            // 401 Unauthorized
+            if ($exception instanceof AuthenticationException) {
+                return response()->json([
+                    'success' => false,
+                    'message' => '인증 실패',
+                    'data' => null,
+                ], 401);
+            }
+
+            // 403 Forbidden
+            if ($exception instanceof AccessDeniedHttpException) {
+                return response()->json([
+                    'success' => false,
+                    'message' => '권한 없음',
+                    'data' => null,
+                ], 403);
+            }
+
+            // 404 Not Found
+            if ($exception instanceof NotFoundHttpException) {
+                return response()->json([
+                    'success' => false,
+                    'message' => '존재하지 않는 URI 또는 데이터',
+                    'data' => null,
+                ], 404);
+            }
+
+            // 405 Method Not Allowed
+            if ($exception instanceof MethodNotAllowedHttpException) {
+                return response()->json([
+                    'success' => false,
+                    'message' => '허용되지 않는 메서드',
+                    'data' => null,
+                ], 405);
+            }
+
+            // 500 Internal Server Error (기타 모든 에러)
+            if (
+                $exception instanceof HttpException &&
+                $exception->getStatusCode() === 500
+            ) {
+                return response()->json([
+                    'success' => false,
+                    'message' => '서버 에러',
+                    'data' => null,
+                ], 500);
+            }
+
+            // 그 외 모든 예외
+            return response()->json([
+                'success' => false,
+                'message' => '서버 에러',
+                'data' => null,
+            ], 500);
+        }
+
+        return parent::render($request, $exception);
+    }
 }