Merge pull request #63 from boostcampwm-2024/be/feature/kakao_oauth

[BE/feature] kakao 로그인 구현

apps/backend/src/auth/auth.controller.ts

@@ -8,6 +8,7 @@ import { signUpResponseDecorator } from './decorator/signup.decorator';
 import { loginResponseDecorator } from './decorator/login.decorator';
 import { AuthGuard } from '@nestjs/passport';
 import { GoogleLoginDto } from './dto/googleLogin.dto';
+import { KakaoLoginDto } from './dto/kakaoLogin.dto';
 import { oauthResponseDecorator } from './decorator/oauth.decorator';
 
 @Controller('api/auth')
@@ -37,10 +38,24 @@ export class AuthController {
 
   @Get('google/redirect')
   @UseGuards(AuthGuard('google'))
+  @ApiOperation({ summary: '구글 로그인 리다이렉션 API' })
   @oauthResponseDecorator()
-  @ApiOperation({ summary: '구글 로그인 후 리다이렉션 API' })
   async googleRedirect(@Req() googleLoginDto: GoogleLoginDto) {
     const tokens = await this.authService.googleLogin(googleLoginDto);
     return successhandler(successMessage.LOGIN_SUCCESS, tokens);
   }
+
+  @Get('kakao')
+  @UseGuards(AuthGuard('kakao'))
+  @ApiOperation({ summary: '카카오 로그인 API' })
+  async kakaoLogin() {}
+
+  @Get('kakao/redirect')
+  @UseGuards(AuthGuard('kakao'))
+  @ApiOperation({ summary: '카카오 로그인 리다이렉션 API' })
+  @oauthResponseDecorator()
+  async kakaoRedirect(@Req() kakaoLoginDto: KakaoLoginDto) {
+    const tokens = await this.authService.kakaoLogin(kakaoLoginDto);
+    return successhandler(successMessage.LOGIN_SUCCESS, tokens);
+  }
 }

apps/backend/src/auth/auth.module.ts

@@ -6,6 +6,7 @@ import { JwtModule } from '@nestjs/jwt';
 import { ConfigModule, ConfigService } from '@nestjs/config';
 import { PassportModule } from '@nestjs/passport';
 import { GoogleStrategy } from './strategies/google.strategy';
+import { KakaoStrategy } from './strategies/kakao.strategy';
 
 @Module({
   imports: [
@@ -21,7 +22,7 @@ import { GoogleStrategy } from './strategies/google.strategy';
       })
     })
   ],
-  providers: [AuthService, GoogleStrategy],
+  providers: [AuthService, GoogleStrategy, KakaoStrategy],
   controllers: [AuthController]
 })
 export class AuthModule {}

apps/backend/src/auth/auth.service.ts

@@ -6,6 +6,7 @@ import { authQueries } from './auth.queries';
 import { LoginDto } from './dto/login.dto';
 import { JwtService } from '@nestjs/jwt';
 import { GoogleLoginDto } from './dto/googleLogin.dto';
+import { KakaoLoginDto } from './dto/kakaoLogin.dto';
 
 @Injectable()
 export class AuthService {
@@ -69,12 +70,12 @@ export class AuthService {
     return { accessToken, refreshToken };
   }
 
-  async googleLogin(googleLoginDto: GoogleLoginDto) {
-    const { email, name } = googleLoginDto;
+  async loginWithSocialMedia(email: string, nickname: string) {
     const existingUser = await this.databaseService.query(authQueries.findByEmailQuery, [email]);
+
     if (!existingUser) {
       const hashedPassword = await bcrypt.hash('default', 10);
-      await this.databaseService.query(authQueries.signUpQuery, [email, hashedPassword, name]);
+      await this.databaseService.query(authQueries.signUpQuery, [email, hashedPassword, nickname]);
     }
     const member = await this.databaseService.query(authQueries.findByEmailQuery, [email]);
     const payload = {
@@ -86,4 +87,14 @@ export class AuthService {
     const refreshToken = this.jwtService.sign(payload, { expiresIn: '7d' });
     return { accessToken, refreshToken };
   }
+
+  async googleLogin(googleLoginDto: GoogleLoginDto) {
+    const { email, name } = googleLoginDto;
+    return this.loginWithSocialMedia(email, name);
+  }
+
+  async kakaoLogin(kakaoLoginDto: KakaoLoginDto) {
+    const { email, nickname } = kakaoLoginDto;
+    return this.loginWithSocialMedia(email, nickname);
+  }
 }

apps/backend/src/auth/dto/kakaoLogin.dto.ts

@@ -0,0 +1,4 @@
+export class KakaoLoginDto {
+  email: string;
+  nickname: string;
+}

apps/backend/src/auth/strategies/kakao.strategy.ts

@@ -0,0 +1,28 @@
+import { Injectable } from '@nestjs/common';
+import { PassportStrategy } from '@nestjs/passport';
+import { Strategy } from 'passport-kakao';
+import { ConfigService } from '@nestjs/config';
+
+@Injectable()
+export class KakaoStrategy extends PassportStrategy(Strategy, 'kakao') {
+  constructor(private configService: ConfigService) {
+    super({
+      clientID: configService.get<string>('KAKAO_REST_API_KEY'),
+      callbackURL: configService.get<string>(
+        'KAKAO_CALLBACK_URL',
+        'http://localhost:3000/auth/kakao/redirect'
+      )
+    });
+  }
+
+  async validate(
+    accessToken: string,
+    refreshToken: string,
+    profile: { nickname: string; email: string }
+  ) {
+    const { nickname, email } = profile;
+
+    const member = { email, nickname };
+    return member;
+  }
+}