feat: add get user by id endpoint

api.http

@@ -36,3 +36,9 @@ Content-Type: application/json
   "lastName": "Doe",
   "password": "secret"
 }
+
+### Get user by id
+GET {{baseUrl}}/user/1 HTTP/1.1
+Accept: application/json
+Content-Type: application/json
+Authorization: Bearer {{token}}

src/common/dto/req/find-user-by-id.req.dto.ts

@@ -1,7 +1,7 @@
-import { IsNotEmpty, IsNumber } from 'class-validator';
+import { IsNotEmpty, IsNumberString } from 'class-validator';
 
 export class FindUserByIdReqDto {
-  @IsNumber()
+  @IsNumberString()
   @IsNotEmpty()
-  readonly id!: number;
+  readonly id!: number | string;
 }

src/user/user.controller.ts

@@ -1,10 +1,22 @@
 import * as express from 'express';
 
-import { LoginReqDto, RegisterUserReqDto, UserResDto } from '@/common/dto';
+import { FindUserByIdReqDto, LoginReqDto, RegisterUserReqDto, UserResDto } from '@/common/dto';
 import { validationMiddleware } from '@/middleware/validation.middleware';
-import { login, register } from '@/user/user.service';
+import { findUserById, login, register } from '@/user/user.service';
 import { safe } from '@/utils/express.utils';
 
+/**
+ * GET /user/:id
+ *
+ * @param req The http request.
+ * @param res The http response.
+ */
+async function getUserById(req: express.Request, res: express.Response) {
+  const { id } = req.params;
+  const user = await findUserById({ id });
+  res.status(200).json(new UserResDto(user));
+}
+
 /**
  * POST /user/login
  *
@@ -34,6 +46,11 @@ async function postRegister(req: express.Request, res: express.Response) {
 /** The /user routes. */
 export default express
   .Router()
+  .get(
+    '/:id',
+    validationMiddleware(FindUserByIdReqDto, 'Invalid user id provided.', 'params'),
+    safe(getUserById)
+  )
   .post(
     '/login',
     validationMiddleware(LoginReqDto, 'Invalid email address or password.'),

src/user/user.service.ts

@@ -1,14 +1,19 @@
 import Boom from 'boom';
 import { getCustomRepository } from 'typeorm';
 
-import { LoginReqDto, RegisterUserReqDto } from '@/common/dto';
+import { FindUserByIdReqDto, LoginReqDto, RegisterUserReqDto } from '@/common/dto';
 import { CookieUser } from '@/common/models/cookie-user.model';
 import { User } from '@/db/entities/user.entity';
 import { UserRepository } from '@/db/repositories/user.repository';
 import { createCookie } from '@/utils/cookie.utils';
 import { encryptPassword, validatePassword } from '@/utils/password.utils';
 import { createTokenPayload } from '@/utils/token.utils';
 
+export async function findUserById(findUserByIdReqDto: FindUserByIdReqDto): Promise<User> {
+  const userRepository = getCustomRepository(UserRepository);
+  return userRepository.findByIdOrFail(Number(findUserByIdReqDto.id));
+}
+
 export async function login(loginReqDto: LoginReqDto): Promise<CookieUser> {
   const userRepository = getCustomRepository(UserRepository);
   const user: User = await userRepository.findByEmailOrFail(loginReqDto.email);