fix: restore oauth callback validation type

Author: blankirigaya

apps/backend/src/routes/auth.ts

@@ -5,7 +5,7 @@ import { generateRefreshToken, hashIp, hashRefreshToken } from '../utils/refresh
 import { oAuthStartSchema } from '../validations/auth.validation.js';
 
 import type { GitHubTokenErrorResponse, GitHubTokenResponse } from '../utils/error.util.js';
-import type { OAuthStartQuery } from '../validations/auth.validation.js';
+import type { OAuthCallbackQuery, OAuthStartQuery } from '../validations/auth.validation.js';
 import type { FastifyInstance, FastifyRequest, FastifyReply } from 'fastify';
 
 interface GitHubEmailResponse {
@@ -21,11 +21,6 @@ const GOOGLE_AUTH_URL = 'https://accounts.google.com/o/oauth2/v2/auth';
 const GOOGLE_TOKEN_URL = 'https://oauth2.googleapis.com/token';
 const GOOGLE_USER_URL = 'https://www.googleapis.com/oauth2/v2/userinfo';
 
-interface OAuthCallbackQuery {
-  code: string;
-  state?: string;
-}
-
 interface GoogleUser {
   id: string;
   email: string;

apps/backend/src/validations/auth.validation.ts

@@ -12,4 +12,11 @@ export const oAuthStartSchema = z.object({
     ),
 });
 
-export type OAuthStartQuery = z.infer<typeof oAuthStartSchema>;
+export type OAuthStartQuery = z.infer<typeof oAuthStartSchema>;
+
+export const oAuthCallbackSchema = z.object({
+  code: z.string().trim().min(1, 'Authorization code is required'),
+  state: z.string().trim().min(1, 'State parameter is required'),
+});
+
+export type OAuthCallbackQuery = z.infer<typeof oAuthCallbackSchema>;