refactor: 서버 사이드에서 Auth가 제거되면 자동으로 Firestore 데이터가 제거되도록 개선

Author: opficdev

DevLog/Data/Repository/AuthenticationRepositoryImpl.swift

@@ -80,7 +80,6 @@ final class AuthenticationRepositoryImpl: AuthenticationRepository {
             }
         }
 
-        try await authService.deleteFirestoreUserData()
         try await authService.deleteCurrentUser()
         try await authService.clearCurrentSession()
     }

DevLog/Infra/Service/AuthService.swift

@@ -7,12 +7,10 @@
 
 import FirebaseAuth
 import FirebaseFirestore
-import FirebaseFunctions
 import FirebaseMessaging
 
 final class AuthService {
     private let store = Firestore.firestore()
-    private let functions = Functions.functions(region: "asia-northeast3")
     private let messaging = Messaging.messaging()
     private let logger = Logger(category: "AuthService")
 
@@ -47,18 +45,6 @@ final class AuthService {
         }
     }
 
-    func deleteFirestoreUserData() async throws {
-        logger.info("Deleting Firestore user data")
-
-        do {
-            let deleteFunction = functions.httpsCallable("deleteUserFirestoreData")
-            _ = try await deleteFunction.call()
-        } catch {
-            logger.error("Failed to delete Firestore user data", error: error)
-            throw error
-        }
-    }
-
     func deleteCurrentUser() async throws {
         logger.info("Deleting FirebaseAuth current user")
 

Firebase/functions/src/index.ts

@@ -21,7 +21,7 @@ import {
 // } from "./auth/google";
 
 import {
-    deleteUserFirestoreData
+    cleanupDeletedUserFirestoreData
 } from "./user/delete";
 
 import {
@@ -65,7 +65,7 @@ export {
 // Google 인증 함수들 (나중에 구현되면 추가)
 
 export {
-    deleteUserFirestoreData
+    cleanupDeletedUserFirestoreData
 };
 
 // FCM 관련 함수들 내보내기

Firebase/functions/src/user/delete.ts

@@ -1,33 +1,24 @@
-import { onCall, HttpsError } from "firebase-functions/v2/https";
+import * as functions from "firebase-functions/v1";
 import * as admin from "firebase-admin";
 import * as logger from "firebase-functions/logger";
 
-export const deleteUserFirestoreData = onCall({
-        cors: true,
-        maxInstances: 10,
-        region: "asia-northeast3"
-    },
-    async (request) => {
-        if (!request.auth?.uid) {
-            logger.error("deleteUserFirestoreData called without authenticated uid", {
-                auth: request.auth ?? null
-            });
-            throw new HttpsError("unauthenticated", "로그인 필요");
-        }
-
-        const uid = request.auth.uid;
+export const cleanupDeletedUserFirestoreData = functions
+    .region("asia-northeast3")
+    .auth
+    .user()
+    .onDelete(async (user) => {
+        const uid = user.uid;
 
         try {
             const userDocRef = admin.firestore().doc(`users/${uid}`);
             await admin.firestore().recursiveDelete(userDocRef);
-
-            // Firestore의 recursiveDelete API 사용 (firebase-tools v9.12.0+)
-            // 실제로는 admin SDK엔 없고, 아래처럼 functions에서 사용할 수 있음
-            // https://firebase.google.com/docs/firestore/solutions/delete-collections?hl=ko#cloud-functions
-            // @ts-ignore
-            return { success: true }
-        } catch (err: any) {
-            throw new HttpsError("internal", `삭제 중 오류: ${err.message || err}`);
+            logger.info("Deleted Firestore user data after Auth user deletion", { uid });
+        } catch (error) {
+            logger.error("Failed to delete Firestore user data after Auth user deletion", {
+                uid,
+                error
+            });
+            throw error;
         }
     }
 );