feat(be): user registration (#31)

* chore: configure linter (#7)

chore: configure linter

* fix: resolve eslint configuration error (#11)

* feat: make register

* feat: error exception handling

* feat: add api prefix

* feat: duplication check api

* fix: resolve conflict error

---------

Co-authored-by: shl0501 <[email protected]>

Author: wlgh1553

Diff for: apps/server/package.json

@@ -22,8 +22,13 @@
   "dependencies": {
     "@nestjs/common": "^10.0.0",
     "@nestjs/core": "^10.0.0",
+    "@nestjs/mapped-types": "*",
     "@nestjs/platform-express": "^10.0.0",
     "@prisma/client": "^5.21.1",
+    "bcrypt": "^5.1.1",
+    "class-transformer": "^0.5.1",
+    "class-validator": "^0.14.1",
+    "express": "^4.21.1",
     "prisma": "^5.21.1",
     "reflect-metadata": "^0.2.0",
     "rxjs": "^7.8.1"
@@ -32,6 +37,7 @@
     "@nestjs/cli": "^10.0.0",
     "@nestjs/schematics": "^10.0.0",
     "@nestjs/testing": "^10.0.0",
+    "@types/bcrypt": "^5.0.2",
     "@types/express": "^5.0.0",
     "@types/jest": "^29.5.2",
     "@types/node": "^20.3.1",

Diff for: apps/server/prisma/schema.prisma

@@ -0,0 +1,16 @@
+generator client {
+  provider = "prisma-client-js"
+}
+
+datasource db {
+  provider = "postgresql"
+  url      = env("DATABASE_URL")
+}
+
+model User {
+  user_id    Int      @id @default(autoincrement())
+  email      String   @unique
+  password   String
+  nickname   String   @unique
+  created_at DateTime @default(now())
+}

Diff for: apps/server/src/app.controller.spec.ts

@@ -1,11 +1,11 @@
 import { Module } from '@nestjs/common';
 
-import { AppController } from './app.controller';
-import { AppService } from './app.service';
+import { PrismaModule } from './prisma/prisma.module';
+import { UsersModule } from './users/users.module';
 
 @Module({
-  imports: [],
-  controllers: [AppController],
-  providers: [AppService],
+  imports: [UsersModule, PrismaModule],
+  controllers: [],
+  providers: [],
 })
 export class AppModule {}

Diff for: apps/server/src/app.controller.ts

@@ -0,0 +1,46 @@
+import { ArgumentsHost, Catch, ExceptionFilter, HttpStatus } from '@nestjs/common';
+import {
+  PrismaClientInitializationError,
+  PrismaClientKnownRequestError,
+  PrismaClientRustPanicError,
+  PrismaClientUnknownRequestError,
+  PrismaClientValidationError,
+} from '@prisma/client/runtime/library';
+import { Response } from 'express';
+
+@Catch(
+  PrismaClientKnownRequestError,
+  PrismaClientUnknownRequestError,
+  PrismaClientRustPanicError,
+  PrismaClientInitializationError,
+  PrismaClientValidationError,
+)
+export class PrismaExceptionFilter implements ExceptionFilter {
+  catch(exception: any, host: ArgumentsHost) {
+    const ctx = host.switchToHttp();
+    const response = ctx.getResponse<Response>();
+    const status = HttpStatus.BAD_REQUEST;
+
+    const errorResponse = {
+      type: 'fail',
+      error: {
+        message: '알 수 없는 오류가 발생했습니다.',
+      },
+    };
+
+    if (exception instanceof PrismaClientKnownRequestError) {
+      if (exception.code === 'P2002') errorResponse.error.message = '이미 존재하는 값입니다. 다른 값을 사용하세요.';
+      else errorResponse.error.message = `Prisma 오류 발생: ${exception.message}`;
+    } else if (exception instanceof PrismaClientUnknownRequestError) {
+      errorResponse.error.message = `알 수 없는 Prisma 오류 발생: ${exception.message}`;
+    } else if (exception instanceof PrismaClientRustPanicError) {
+      errorResponse.error.message = 'Prisma 엔진에서 패닉이 발생했습니다. 관리자에게 문의하세요.';
+    } else if (exception instanceof PrismaClientInitializationError) {
+      errorResponse.error.message = 'Prisma 초기화 오류가 발생했습니다. 설정을 확인하세요.';
+    } else if (exception instanceof PrismaClientValidationError) {
+      errorResponse.error.message = `유효성 검사 오류: ${exception.message}`;
+    }
+
+    response.status(status).json(errorResponse);
+  }
+}

Diff for: apps/server/src/app.module.ts

@@ -0,0 +1,25 @@
+import { ArgumentsHost, BadRequestException, Catch, ExceptionFilter } from '@nestjs/common';
+import { Request, Response } from 'express';
+
+@Catch(BadRequestException)
+export class ValidationExceptionFilter implements ExceptionFilter {
+  catch(exception: BadRequestException, host: ArgumentsHost) {
+    const ctx = host.switchToHttp();
+    const response = ctx.getResponse<Response>();
+    const request = ctx.getRequest<Request>();
+    const status = exception.getStatus();
+    const exceptionResponse = exception.getResponse();
+
+    const errorMessage = typeof exceptionResponse === 'string' ? exceptionResponse : (exceptionResponse as any).message;
+
+    response.status(status).json({
+      type: 'fail',
+      error: {
+        statusCode: status,
+        timestamp: new Date().toISOString(),
+        path: request.url,
+        messages: Array.isArray(errorMessage) ? errorMessage : [errorMessage],
+      },
+    });
+  }
+}

Diff for: apps/server/src/app.service.ts

@@ -1,9 +1,20 @@
+import { ValidationPipe } from '@nestjs/common';
 import { NestFactory } from '@nestjs/core';
 
 import { AppModule } from './app.module';
-
+import { PrismaExceptionFilter } from './filters/prisma-exception.filter';
+import { ValidationExceptionFilter } from './filters/validation-exception.filter';
 async function bootstrap() {
   const app = await NestFactory.create(AppModule);
+
+  app.setGlobalPrefix('api');
+
+  app.useGlobalPipes(new ValidationPipe({ whitelist: true, forbidNonWhitelisted: true }));
+
+  app.useGlobalFilters(new ValidationExceptionFilter());
+
+  app.useGlobalFilters(new PrismaExceptionFilter());
+
   await app.listen(process.env.PORT ?? 3000);
 }
 bootstrap();

Diff for: apps/server/src/filters/prisma-exception.filter.ts

@@ -0,0 +1,9 @@
+import { Module } from '@nestjs/common';
+
+import { PrismaService } from './prisma.service';
+
+@Module({
+  providers: [PrismaService],
+  exports: [PrismaService],
+})
+export class PrismaModule {}

Diff for: apps/server/src/filters/validation-exception.filter.ts

@@ -0,0 +1,13 @@
+import { Injectable, OnModuleDestroy, OnModuleInit } from '@nestjs/common';
+import { PrismaClient } from '@prisma/client';
+
+@Injectable()
+export class PrismaService extends PrismaClient implements OnModuleInit, OnModuleDestroy {
+  async onModuleInit() {
+    await this.$connect();
+  }
+
+  async onModuleDestroy() {
+    await this.$disconnect();
+  }
+}

Diff for: apps/server/src/main.ts

@@ -0,0 +1,21 @@
+import { IsEmail, IsNotEmpty, IsString, MaxLength, MinLength, NotContains } from 'class-validator';
+
+export class CreateUserDto {
+  @IsEmail()
+  @IsNotEmpty()
+  @NotContains(' ')
+  email: string;
+
+  @IsString()
+  @IsNotEmpty()
+  @MinLength(3)
+  @MaxLength(20)
+  @NotContains(' ')
+  nickname: string;
+
+  @IsString()
+  @MinLength(8)
+  @MaxLength(20)
+  @NotContains(' ')
+  password: string;
+}

Diff for: apps/server/src/prisma/prisma.module.ts

@@ -0,0 +1,15 @@
+import { IsEmail, IsOptional, IsString, MaxLength, MinLength, NotContains } from 'class-validator';
+
+export class ValidateUserDto {
+  @IsOptional()
+  @IsEmail()
+  @NotContains(' ')
+  email: string;
+
+  @IsOptional()
+  @IsString()
+  @MinLength(3)
+  @MaxLength(20)
+  @NotContains(' ')
+  nickname: string;
+}

Diff for: apps/server/src/prisma/prisma.service.ts

@@ -0,0 +1,21 @@
+import { Test, TestingModule } from '@nestjs/testing';
+
+import { UsersController } from './users.controller';
+import { UsersService } from './users.service';
+
+describe('UsersController', () => {
+  let controller: UsersController;
+
+  beforeEach(async () => {
+    const module: TestingModule = await Test.createTestingModule({
+      controllers: [UsersController],
+      providers: [UsersService],
+    }).compile();
+
+    controller = module.get<UsersController>(UsersController);
+  });
+
+  it('should be defined', () => {
+    expect(controller).toBeDefined();
+  });
+});

Diff for: apps/server/src/users/dto/create-user.dto.ts

@@ -0,0 +1,32 @@
+import { BadRequestException, Body, Controller, Get, Post, Query } from '@nestjs/common';
+
+import { CreateUserDto } from './dto/create-user.dto';
+import { ValidateUserDto } from './dto/validate-user.dto';
+import { UsersService } from './users.service';
+
+@Controller('users')
+export class UsersController {
+  constructor(private readonly usersService: UsersService) {}
+
+  @Post()
+  async create(@Body() createUserDto: CreateUserDto) {
+    await this.usersService.create(createUserDto);
+    return {
+      type: 'success',
+      data: {},
+    };
+  }
+
+  @Get()
+  async checkDuplication(@Query() validateUserDto: ValidateUserDto) {
+    if (!validateUserDto.email && !validateUserDto.nickname) throw new BadRequestException('중복확인을 위한 email 또는 nickname을 제공해주세요.');
+
+    if (validateUserDto.email && validateUserDto.nickname) throw new BadRequestException('이메일 또는 닉네임 하나만 요청해 주세요.');
+    return {
+      type: 'success',
+      data: {
+        exists: await this.usersService.exist(validateUserDto),
+      },
+    };
+  }
+}

Diff for: apps/server/src/users/dto/validate-user.dto.ts

@@ -0,0 +1,13 @@
+import { Module } from '@nestjs/common';
+
+import { UsersController } from './users.controller';
+import { UserRepository } from './users.repository';
+import { UsersService } from './users.service';
+import { PrismaModule } from '../prisma/prisma.module';
+
+@Module({
+  imports: [PrismaModule],
+  controllers: [UsersController],
+  providers: [UsersService, UserRepository],
+})
+export class UsersModule {}

Diff for: apps/server/src/users/users.controller.spec.ts

@@ -0,0 +1,25 @@
+import { Injectable } from '@nestjs/common';
+
+import { PrismaService } from '../prisma/prisma.service';
+import { CreateUserDto } from './dto/create-user.dto';
+
+@Injectable()
+export class UserRepository {
+  constructor(private readonly prisma: PrismaService) {}
+
+  async create(data: CreateUserDto) {
+    await this.prisma.user.create({ data });
+  }
+
+  async findByEmail(email: string) {
+    return this.prisma.user.findUnique({
+      where: { email },
+    });
+  }
+
+  async findByNickname(nickname: string) {
+    return this.prisma.user.findUnique({
+      where: { nickname },
+    });
+  }
+}

Diff for: apps/server/src/users/users.controller.ts

@@ -0,0 +1,19 @@
+import { Test, TestingModule } from '@nestjs/testing';
+
+import { UsersService } from './users.service';
+
+describe('UsersService', () => {
+  let service: UsersService;
+
+  beforeEach(async () => {
+    const module: TestingModule = await Test.createTestingModule({
+      providers: [UsersService],
+    }).compile();
+
+    service = module.get<UsersService>(UsersService);
+  });
+
+  it('should be defined', () => {
+    expect(service).toBeDefined();
+  });
+});