[BE] kakao 로그인시 회원 가입 기능 추가

BE/src/auth/auth.controller.ts

@@ -53,12 +53,14 @@ export class AuthController {
   @ApiOperation({ summary: 'Kakao 로그인 API' })
   @Get('/kakao')
   @UseGuards(AuthGuard('kakao'))
-  async kakaoLogin(
-    @Body() authCredentialsDto: AuthCredentialsDto,
-    @Res() res: Response,
-  ) {
+  async kakaoLogin(@Req() req: Request, @Res() res: Response) {
+    const authCredentialsDto: AuthCredentialsDto = {
+      email: req.user.email,
+      kakaoId: req.user.kakaoId,
+    };
     const { accessToken, refreshToken } =
       await this.authService.kakaoLoginUser(authCredentialsDto);
+
     res.cookie('accessToken', accessToken, { httpOnly: true });
     res.cookie('refreshToken', refreshToken, { httpOnly: true });
     res.cookie('isRefreshToken', true, { httpOnly: true });

BE/src/auth/auth.service.ts

@@ -39,6 +39,13 @@ export class AuthService {
   async kakaoLoginUser(
     authCredentialsDto: AuthCredentialsDto,
   ): Promise<{ accessToken: string; refreshToken: string }> {
+    const user = await this.userRepository.findOne({
+      where: { kakaoId: authCredentialsDto.kakaoId },
+    });
+
+    if (!user) {
+      await this.userRepository.registerKakaoUser(authCredentialsDto);
+    }
     return this.getJWTToken(authCredentialsDto);
   }
 

BE/src/auth/dto/auth-credentials.dto.ts

@@ -27,13 +27,15 @@ export class AuthCredentialsDto {
 
   @ApiProperty({
     description: '카카오 ID',
+    required: false,
   })
   @IsString()
   @IsOptional()
   kakaoId?: string;
 
   @ApiProperty({
     description: '카카오 액세스 토큰',
+    required: false,
   })
   @IsString()
   @IsOptional()

BE/src/auth/strategy/kakao.strategy.ts

@@ -13,6 +13,9 @@ interface KakaoProfile extends Profile {
   id: number;
   _json: {
     id: number;
+    kakao_account: {
+      email: string;
+    };
   };
 }
 
@@ -44,7 +47,10 @@ export class KakaoStrategy extends PassportStrategy<Strategy>(
     try {
       // eslint-disable-next-line no-underscore-dangle
       const kakaoId = profile._json.id;
+      // eslint-disable-next-line no-underscore-dangle
+      const { email } = profile._json.kakao_account;
       const user = {
+        email,
         kakaoId,
       };
       done(null, user);

BE/src/auth/user.entity.ts

@@ -15,8 +15,8 @@ export class User extends BaseEntity {
   @Column({ default: false })
   tutorial: boolean;
 
-  @Column({ default: -1 })
-  kakaoId: number;
+  @Column({ default: '' })
+  kakaoId: string;
 
   @Column({ default: '' })
   currentRefreshToken: string;
@@ -25,7 +25,7 @@ export class User extends BaseEntity {
   currentRefreshTokenExpiresAt: Date;
 
   toAuthCredentialsDto(): AuthCredentialsDto {
-    if (this.kakaoId === -1) {
+    if (this.kakaoId === '') {
       return {
         email: this.email,
         password: this.password,

BE/src/auth/user.repository.ts

@@ -19,6 +19,14 @@ export class UserRepository extends Repository<User> {
     await this.save(user);
   }
 
+  async registerKakaoUser(authCredentialsDto: AuthCredentialsDto) {
+    const { kakaoId, email } = authCredentialsDto;
+    const salt: string = await bcrypt.genSalt();
+    const hashedPassword: string = await bcrypt.hash(String(kakaoId), salt);
+    const user = this.create({ email, kakaoId, password: hashedPassword });
+    await this.save(user);
+  }
+
   async updateUserWithRefreshToken(
     id: number,
     {

BE/src/stock/order/stock-order.service.ts

@@ -4,7 +4,6 @@ import {
   Injectable,
 } from '@nestjs/common';
 import { NotFoundError } from 'rxjs';
-import { Injectable } from '@nestjs/common';
 import { StockOrderRequestDto } from './dto/stock-order-request.dto';
 import { StockOrderRepository } from './stock-order.repository';
 import { TradeType } from './enum/trade-type';

BE/src/types/express.d.ts

@@ -4,8 +4,9 @@ import { UUID } from 'crypto';
 declare module 'express' {
   interface Request extends Req {
     user: {
-      kakaoId?: number;
+      kakaoId?: string;
       userId?: UUID;
+      email?: string;
     };
   }
 }