issue # 이메일 인증 코드 발송 로직 구현

.env

@@ -19,7 +19,7 @@ GMAIL_USER=bkd.scheduler@gmail.com
 GMAIL_PASS= # 앱 비밀번호 또는 OAuth2 토큰
 GMAIL_CLIENT_ID=688417162908-iqvnj4ceb8t1dkbjr70dtcafo27m8kqe.apps.googleusercontent.com
 GMAIL_CLIENT_SECRET=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
-GMAIL_REFRESH_TOKEN=1//04_pSivNoGpPUCgYIARAAGAQSNwF-L9IrO0Kx6jSzq_eQNjdl65f0O2iqKSNpFeZ3gtIGMhOk0oiZsnKrPfWs8jvuEic1NhUoZ0g
+GMAIL_REFRESH_TOKEN=1//04P8ekVQmkdtnCgYIARAAGAQSNwF-L9IrqPOyH8oYB-mdjUqw9jGHienVLBTWFdiZgpRnPgFmYnAdbjnstd9RkRVeJErB0NRAwg4
 
 # SMTP 추가 옵션
 SMTP_AUTH=true

package.json

@@ -28,7 +28,9 @@
     "dotenv": "^17.2.3",
     "drizzle-kit": "^0.31.7",
     "drizzle-orm": "^0.44.7",
+    "googleapis": "^166.0.0",
     "ioredis": "^5.8.2",
+    "nodemailer": "^7.0.10",
     "pg": "^8.16.3",
     "reflect-metadata": "^0.2.2",
     "rxjs": "^7.8.1"
@@ -43,6 +45,7 @@
     "@types/ioredis": "^5.0.0",
     "@types/jest": "^30.0.0",
     "@types/node": "^22.10.7",
+    "@types/nodemailer": "^7.0.4",
     "@types/pg": "^8.15.6",
     "@types/supertest": "^6.0.2",
     "eslint": "^9.18.0",

src/app.module.ts

@@ -3,9 +3,11 @@ import { AppController } from './app.controller';
 import { AppService } from './app.service';
 import { DbModule } from './db/db.module';
 import { RedisModule } from './redis/redis.module';
+import { AccountModule } from './modules/account/account.module';
+import { MailerModule } from './util/mailer/mailer.module';
 
 @Module({
-  imports: [DbModule, RedisModule],
+  imports: [DbModule, RedisModule, MailerModule, AccountModule],
   controllers: [AppController],
   providers: [AppService],
 })

src/main.ts

@@ -1,5 +1,8 @@
 import { NestFactory } from '@nestjs/core';
 import { AppModule } from './app.module';
+import dotenv from 'dotenv';
+
+dotenv.config();
 
 async function bootstrap() {
   const app = await NestFactory.create(AppModule);

src/modules/account/account.controller.ts

@@ -1,14 +1,27 @@
-import { Controller, Get, Post, Query } from "@nestjs/common";
+import { Body, Controller, Get, Post, Query } from "@nestjs/common";
 import { CheckDuplicationRequestDto } from "./dto/checkDuplication/check-duplication-request.dto";
 import { CheckDuplicationResponseDto } from "./dto/checkDuplication/check-duplication-response.dto";
 import { AccountService } from "./account.service";
+import { SendVerificationCodeRequestDto } from "./dto/checkDuplication/send-verification-code-request.dto";
+import { SendVerificationCodeResponseDto } from "./dto/checkDuplication/send-verification-code-response.dto";
 
 @Controller('account')
 export class AccountController {
   constructor(private readonly accountService: AccountService) {}
 
+  @Get('/')
+  async test() {
+    return "Test"
+  }
+
   @Get('check-duplication')
   async checkDuplication(@Query() query: CheckDuplicationRequestDto): Promise<CheckDuplicationResponseDto> {
-    return this.accountService.checkDuplication(query);
+    return await this.accountService.checkDuplication(query);
+  }
+
+  @Post('send-verification-code')
+  async sendVerificationCode(@Body() body: SendVerificationCodeRequestDto): Promise<SendVerificationCodeResponseDto> {
+    const result = await this.accountService.sendVerificationCode(body);
+    return result;
   }
 }

src/modules/account/account.module.ts

@@ -5,6 +5,7 @@ import { AccountService } from "./account.service";
 
 @Module({
   controllers: [AccountController],
-  providers: [AccountService, AccountRepo]
+  providers: [AccountService, AccountRepo],
+  exports: [AccountService, AccountRepo]
 })
 export class AccountModule {}

src/modules/account/account.service.ts

@@ -2,14 +2,33 @@ import { Injectable } from "@nestjs/common";
 import { AccountRepo } from "./account.repo";
 import { CheckDuplicationRequestDto } from "./dto/checkDuplication/check-duplication-request.dto";
 import { CheckDuplicationResponseDto } from "./dto/checkDuplication/check-duplication-response.dto";
+import { SendVerificationCodeRequestDto } from "./dto/checkDuplication/send-verification-code-request.dto";
+import { MailerService } from "src/util/mailer/mailer.service";
+import { Generator } from "src/util/generator";
+import { SendVerificationCodeResponseDto } from "./dto/checkDuplication/send-verification-code-response.dto";
 
 @Injectable()
 export class AccountService {
-  constructor(private readonly accountRepo: AccountRepo) {}
+  constructor(
+    private readonly accountRepo: AccountRepo
+    , private readonly mailerService: MailerService
+  ) {}
 
   async checkDuplication(data: CheckDuplicationRequestDto): Promise<CheckDuplicationResponseDto> {
     const count = await this.accountRepo.checkDuplication(data.type, data.value);
 
     return { isDuplicated: count > 0 };
   }
+
+  async sendVerificationCode(data: SendVerificationCodeRequestDto): Promise<SendVerificationCodeResponseDto> {
+    const code = Generator.getVerificationCode();
+    const html = `<p>Your verification code is: <strong style="font-size:16px;">${code}</strong></p>`;
+    const result = await this.mailerService.sendMail(data.email, "<Scheduler> 이메일 인증 코드", html);
+
+    if (result.rejected.length > 0) {
+      return { success: false, error: result.response }
+    } else {
+      return { success: true, message: "이메일 발송 완료" };
+    }
+  }
 }

src/modules/account/dto/checkDuplication/send-verification-code-request.dto.ts

@@ -0,0 +1,6 @@
+import { IsEmail } from "@nestjs/class-validator";
+
+export class SendVerificationCodeRequestDto {
+  @IsEmail()
+  email: string;
+}

src/modules/account/dto/checkDuplication/send-verification-code-response.dto.ts

@@ -0,0 +1,5 @@
+export class SendVerificationCodeResponseDto {
+  success: boolean;
+  message?: string;
+  error?: string;
+}

src/util/generator.ts

@@ -0,0 +1,5 @@
+export class Generator {
+  static getVerificationCode() {
+    return Math.random().toString().slice(2, 8);
+  }
+}

src/util/mailer/mailer.module.ts

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

src/util/mailer/mailer.service.ts

@@ -0,0 +1,46 @@
+import { Injectable } from '@nestjs/common';
+import nodemailer from 'nodemailer';
+import { google } from 'googleapis';
+import SMTPTransport from 'nodemailer/lib/smtp-transport';
+
+@Injectable()
+export class MailerService {
+  private oauth2Client = new google.auth.OAuth2(
+    process.env.GMAIL_CLIENT_ID,
+    process.env.GMAIL_CLIENT_SECRET,
+    'https://developers.google.com/oauthplayground'
+  );
+
+  constructor() {
+    this.oauth2Client.setCredentials({
+      refresh_token: process.env.GMAIL_REFRESH_TOKEN
+    });
+  }
+
+  async sendMail(to: string, subject: string, html: string) {
+    const accessToken = await this.oauth2Client.getAccessToken();
+    console.log(accessToken);
+    const options: SMTPTransport.Options = {
+      host: "smtp.gmail.com",
+      port: 465,
+      secure: true,
+      auth: {
+        type: "OAuth2",
+        user: process.env.GMAIL_USER,
+        clientId: process.env.GMAIL_CLIENT_ID,
+        clientSecret: process.env.GMAIL_CLIENT_SECRET,
+        refreshToken: process.env.GMAIL_REFRESH_TOKEN,
+        accessToken: accessToken?.token || ''
+      }
+    }
+
+    const transporter = nodemailer.createTransport(options);
+
+    return transporter.sendMail({
+      from: `Scheduler ${process.env.GMAIL_USER}>`,
+      to,
+      subject,
+      html
+    })
+  }
+}