issue # nestjs 로 초기화

src/modules/account/account.controller.ts

@@ -0,0 +1,14 @@
+import { 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";
+
+@Controller('account')
+export class AccountController {
+  constructor(private readonly accountService: AccountService) {}
+
+  @Get('check-duplication')
+  async checkDuplication(@Query() query: CheckDuplicationRequestDto): Promise<CheckDuplicationResponseDto> {
+    return this.accountService.checkDuplication(query);
+  }
+}

src/modules/account/account.module.ts

@@ -0,0 +1,10 @@
+import { Module } from "@nestjs/common";
+import { AccountController } from "./account.controller";
+import { AccountRepo } from "./account.repo";
+import { AccountService } from "./account.service";
+
+@Module({
+  controllers: [AccountController],
+  providers: [AccountService, AccountRepo]
+})
+export class AccountModule {}

src/modules/account/account.repo.ts

@@ -0,0 +1,21 @@
+import { Inject, Injectable } from "@nestjs/common";
+import * as schema from "drizzle/schema";
+import { countDistinct, and, eq } from 'drizzle-orm';
+import { NodePgDatabase } from "drizzle-orm/node-postgres";
+
+@Injectable()
+export class AccountRepo {
+  constructor(@Inject('DRIZZLE') private readonly db: NodePgDatabase<typeof schema>) {}
+
+  async checkDuplication(type: 'email' | 'accountId', value: string) {
+    const result = await this
+    .db
+    .select({ count: countDistinct(schema.account[type])})
+    .from(schema.account)
+    .where(
+      eq(schema.account[type], value)
+    );
+
+    return result[0].count;
+  }
+}

src/modules/account/account.service.ts

@@ -0,0 +1,15 @@
+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";
+
+@Injectable()
+export class AccountService {
+  constructor(private readonly accountRepo: AccountRepo) {}
+
+  async checkDuplication(data: CheckDuplicationRequestDto): Promise<CheckDuplicationResponseDto> {
+    const count = await this.accountRepo.checkDuplication(data.type, data.value);
+
+    return { isDuplicated: count > 0 };
+  }
+}

src/modules/account/dto/checkDuplication/check-duplication-request.dto.ts

@@ -0,0 +1,9 @@
+import { IsString, IsIn } from '@nestjs/class-validator'
+
+export class CheckDuplicationRequestDto {
+  @IsIn(['email', 'accountId'])
+  type: 'email' | 'accountId';
+
+  @IsString()
+  value: string;
+}

src/modules/account/dto/checkDuplication/check-duplication-response.dto.ts

@@ -0,0 +1,3 @@
+export class CheckDuplicationResponseDto {
+  isDuplicated: boolean;
+}