modify: token 고정 길이 값 명시 & exception 재사용

Author: Jihyun3478

src/controllers/qr.controller.ts

@@ -2,6 +2,10 @@ import { NextFunction, Request, RequestHandler, Response } from 'express';
 import logger from '@/configs/logger.config';
 import { QRLoginTokenService } from "@/services/qr.service";
 import { QRLoginTokenResponseDto } from "@/types/dto/responses/qrResponse.type";
+import { InvalidTokenError, TokenExpiredError } from '@/exception/token.exception';
+
+// TODO: randomUUID() 기반으로 길이 36
+type Token32 = string & { __lengthBrand: 32 };
 
 export class QRLoginController {
   constructor(private qrService: QRLoginTokenService) {}
@@ -18,10 +22,12 @@ export class QRLoginController {
 
       const token = await this.qrService.create(user.id, ip, userAgent);
 
+      const typedToken = token as Token32;
+
       const response = new QRLoginTokenResponseDto(
         true,
         'QR 토큰 생성 완료',
-        { token: token },
+        { token: typedToken },
         null
       );
       res.status(200).json(response);
@@ -36,13 +42,13 @@ export class QRLoginController {
       const token = req.query.token as string;
 
       if (!token) {
-        res.status(400).json({ success: false, message: '토큰이 필요합니다.' });
+        throw new InvalidTokenError('토큰이 필요합니다.');
       }
 
       const found = await this.qrService.getByToken(token);
 
       if (!found) {
-        res.status(404).json({ success: false, message: '유효하지 않거나 만료된 토큰입니다.' });
+        throw new TokenExpiredError();
       }
 
       res.status(200).json({ success: true, message: '유효한 QR 토큰입니다.', token: found });
@@ -51,4 +57,4 @@ export class QRLoginController {
       next(error);
     }
   };
-}
+}

src/types/dto/responses/qrResponse.type.ts

@@ -1,7 +1,9 @@
 import { BaseResponseDto } from '@/types/dto/responses/baseResponse.type';
 
-interface QRLoginTokenResponseData {
-    token: string;
-  }
-  
-export class QRLoginTokenResponseDto extends BaseResponseDto<QRLoginTokenResponseData> { }
+type Token32 = string & { __lengthBrand: 32 };
+
+export interface QRLoginTokenResponseData {
+  token: Token32;
+}
+
+export class QRLoginTokenResponseDto extends BaseResponseDto<QRLoginTokenResponseData> {}