Initial Nest.js backend

2024-03-26 00:44:28 +02:00
parent 652894fcc9
commit 8a947d5831
35 changed files with 11307 additions and 1 deletions
--- a/backend/.eslintrc.js
+++ b/backend/.eslintrc.js
@@ -0,0 +1,25 @@
+module.exports = {
+  parser: '@typescript-eslint/parser',
+  parserOptions: {
+    project: 'tsconfig.json',
+    tsconfigRootDir: __dirname,
+    sourceType: 'module',
+  },
+  plugins: ['@typescript-eslint/eslint-plugin'],
+  extends: [
+    'plugin:@typescript-eslint/recommended',
+    'plugin:prettier/recommended',
+  ],
+  root: true,
+  env: {
+    node: true,
+    jest: true,
+  },
+  ignorePatterns: ['.eslintrc.js'],
+  rules: {
+    '@typescript-eslint/interface-name-prefix': 'off',
+    '@typescript-eslint/explicit-function-return-type': 'off',
+    '@typescript-eslint/explicit-module-boundary-types': 'off',
+    '@typescript-eslint/no-explicit-any': 'off',
+  },
+};
--- a/backend/.gitignore
+++ b/backend/.gitignore
@@ -0,0 +1,58 @@
+# compiled output
+/dist
+/node_modules
+/build
+
+# Logs
+logs
+*.log
+npm-debug.log*
+pnpm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+lerna-debug.log*
+
+# OS
+.DS_Store
+
+# Tests
+/coverage
+/.nyc_output
+
+# IDEs and editors
+/.idea
+.project
+.classpath
+.c9/
+*.launch
+.settings/
+*.sublime-workspace
+
+# IDE - VSCode
+.vscode/*
+!.vscode/settings.json
+!.vscode/tasks.json
+!.vscode/launch.json
+!.vscode/extensions.json
+
+# dotenv environment variable files
+.env
+.env.development.local
+.env.test.local
+.env.production.local
+.env.local
+
+# temp directory
+.temp
+.tmp
+
+# Runtime data
+pids
+*.pid
+*.seed
+*.pid.lock
+
+# Diagnostic reports (https://nodejs.org/api/report.html)
+report.[0-9]*.[0-9]*.[0-9]*.[0-9]*.json
+
+*.sqlite
--- a/backend/.prettierrc
+++ b/backend/.prettierrc
@@ -0,0 +1,4 @@
+{
+  "singleQuote": true,
+  "trailingComma": "all"
+}
--- a/backend/README.md
+++ b/backend/README.md
@@ -0,0 +1,73 @@
+<p align="center">
+  <a href="http://nestjs.com/" target="blank"><img src="https://nestjs.com/img/logo-small.svg" width="200" alt="Nest Logo" /></a>
+</p>
+
+[circleci-image]: https://img.shields.io/circleci/build/github/nestjs/nest/master?token=abc123def456
+[circleci-url]: https://circleci.com/gh/nestjs/nest
+
+  <p align="center">A progressive <a href="http://nodejs.org" target="_blank">Node.js</a> framework for building efficient and scalable server-side applications.</p>
+    <p align="center">
+<a href="https://www.npmjs.com/~nestjscore" target="_blank"><img src="https://img.shields.io/npm/v/@nestjs/core.svg" alt="NPM Version" /></a>
+<a href="https://www.npmjs.com/~nestjscore" target="_blank"><img src="https://img.shields.io/npm/l/@nestjs/core.svg" alt="Package License" /></a>
+<a href="https://www.npmjs.com/~nestjscore" target="_blank"><img src="https://img.shields.io/npm/dm/@nestjs/common.svg" alt="NPM Downloads" /></a>
+<a href="https://circleci.com/gh/nestjs/nest" target="_blank"><img src="https://img.shields.io/circleci/build/github/nestjs/nest/master" alt="CircleCI" /></a>
+<a href="https://coveralls.io/github/nestjs/nest?branch=master" target="_blank"><img src="https://coveralls.io/repos/github/nestjs/nest/badge.svg?branch=master#9" alt="Coverage" /></a>
+<a href="https://discord.gg/G7Qnnhy" target="_blank"><img src="https://img.shields.io/badge/discord-online-brightgreen.svg" alt="Discord"/></a>
+<a href="https://opencollective.com/nest#backer" target="_blank"><img src="https://opencollective.com/nest/backers/badge.svg" alt="Backers on Open Collective" /></a>
+<a href="https://opencollective.com/nest#sponsor" target="_blank"><img src="https://opencollective.com/nest/sponsors/badge.svg" alt="Sponsors on Open Collective" /></a>
+  <a href="https://paypal.me/kamilmysliwiec" target="_blank"><img src="https://img.shields.io/badge/Donate-PayPal-ff3f59.svg"/></a>
+    <a href="https://opencollective.com/nest#sponsor"  target="_blank"><img src="https://img.shields.io/badge/Support%20us-Open%20Collective-41B883.svg" alt="Support us"></a>
+  <a href="https://twitter.com/nestframework" target="_blank"><img src="https://img.shields.io/twitter/follow/nestframework.svg?style=social&label=Follow"></a>
+</p>
+  <!--[![Backers on Open Collective](https://opencollective.com/nest/backers/badge.svg)](https://opencollective.com/nest#backer)
+  [![Sponsors on Open Collective](https://opencollective.com/nest/sponsors/badge.svg)](https://opencollective.com/nest#sponsor)-->
+
+## Description
+
+[Nest](https://github.com/nestjs/nest) framework TypeScript starter repository.
+
+## Installation
+
+```bash
+$ npm install
+```
+
+## Running the app
+
+```bash
+# development
+$ npm run start
+
+# watch mode
+$ npm run start:dev
+
+# production mode
+$ npm run start:prod
+```
+
+## Test
+
+```bash
+# unit tests
+$ npm run test
+
+# e2e tests
+$ npm run test:e2e
+
+# test coverage
+$ npm run test:cov
+```
+
+## Support
+
+Nest is an MIT-licensed open source project. It can grow thanks to the sponsors and support by the amazing backers. If you'd like to join them, please [read more here](https://docs.nestjs.com/support).
+
+## Stay in touch
+
+- Author - [Kamil Myśliwiec](https://kamilmysliwiec.com)
+- Website - [https://nestjs.com](https://nestjs.com/)
+- Twitter - [@nestframework](https://twitter.com/nestframework)
+
+## License
+
+Nest is [MIT licensed](LICENSE).
--- a/backend/nest-cli.json
+++ b/backend/nest-cli.json
@@ -0,0 +1,8 @@
+{
+  "$schema": "https://json.schemastore.org/nest-cli",
+  "collection": "@nestjs/schematics",
+  "sourceRoot": "src",
+  "compilerOptions": {
+    "deleteOutDir": true
+  }
+}
--- a/backend/package-lock.json
+++ b/backend/package-lock.json
--- a/backend/package.json
+++ b/backend/package.json
@@ -0,0 +1,72 @@
+{
+  "name": "backend",
+  "version": "0.0.1",
+  "description": "",
+  "author": "",
+  "private": true,
+  "license": "UNLICENSED",
+  "scripts": {
+    "build": "nest build",
+    "format": "prettier --write \"src/**/*.ts\" \"test/**/*.ts\"",
+    "start": "nest start",
+    "start:dev": "nest start --watch",
+    "start:debug": "nest start --debug --watch",
+    "start:prod": "node dist/main",
+    "lint": "eslint \"{src,apps,libs,test}/**/*.ts\" --fix",
+    "test": "jest",
+    "test:watch": "jest --watch",
+    "test:cov": "jest --coverage",
+    "test:debug": "node --inspect-brk -r tsconfig-paths/register -r ts-node/register node_modules/.bin/jest --runInBand",
+    "test:e2e": "jest --config ./test/jest-e2e.json"
+  },
+  "dependencies": {
+    "@nestjs/common": "^10.0.0",
+    "@nestjs/core": "^10.0.0",
+    "@nestjs/jwt": "^10.2.0",
+    "@nestjs/platform-express": "^10.0.0",
+    "reflect-metadata": "^0.2.1",
+    "rxjs": "^7.8.1",
+    "sqlite3": "^5.1.7",
+    "typeorm": "^0.3.20"
+  },
+  "devDependencies": {
+    "@nestjs/cli": "^10.0.0",
+    "@nestjs/schematics": "^10.0.0",
+    "@nestjs/testing": "^10.0.0",
+    "@types/express": "^4.17.17",
+    "@types/jest": "^29.5.2",
+    "@types/node": "^20.3.1",
+    "@types/supertest": "^6.0.0",
+    "@typescript-eslint/eslint-plugin": "^6.0.0",
+    "@typescript-eslint/parser": "^6.0.0",
+    "eslint": "^8.42.0",
+    "eslint-config-prettier": "^9.0.0",
+    "eslint-plugin-prettier": "^5.0.0",
+    "jest": "^29.5.0",
+    "prettier": "^3.0.0",
+    "source-map-support": "^0.5.21",
+    "supertest": "^6.3.3",
+    "ts-jest": "^29.1.0",
+    "ts-loader": "^9.4.3",
+    "ts-node": "^10.9.1",
+    "tsconfig-paths": "^4.2.0",
+    "typescript": "^5.1.3"
+  },
+  "jest": {
+    "moduleFileExtensions": [
+      "js",
+      "json",
+      "ts"
+    ],
+    "rootDir": "src",
+    "testRegex": ".*\\.spec\\.ts$",
+    "transform": {
+      "^.+\\.(t|j)s$": "ts-jest"
+    },
+    "collectCoverageFrom": [
+      "**/*.(t|j)s"
+    ],
+    "coverageDirectory": "../coverage",
+    "testEnvironment": "node"
+  }
+}
--- a/backend/src/app.controller.spec.ts
+++ b/backend/src/app.controller.spec.ts
@@ -0,0 +1,22 @@
+import { Test, TestingModule } from '@nestjs/testing';
+import { AppController } from './app.controller';
+import { AppService } from './app.service';
+
+describe('AppController', () => {
+  let appController: AppController;
+
+  beforeEach(async () => {
+    const app: TestingModule = await Test.createTestingModule({
+      controllers: [AppController],
+      providers: [AppService],
+    }).compile();
+
+    appController = app.get<AppController>(AppController);
+  });
+
+  describe('root', () => {
+    it('should return "Hello World!"', () => {
+      expect(appController.getHello()).toBe('Hello World!');
+    });
+  });
+});
--- a/backend/src/app.controller.ts
+++ b/backend/src/app.controller.ts
@@ -0,0 +1,12 @@
+import { Controller, Get } from '@nestjs/common';
+import { AppService } from './app.service';
+
+@Controller()
+export class AppController {
+  constructor(private readonly appService: AppService) {}
+
+  @Get()
+  getHello(): string {
+    return this.appService.getHello();
+  }
+}
--- a/backend/src/app.module.ts
+++ b/backend/src/app.module.ts
@@ -0,0 +1,13 @@
+import { Module } from '@nestjs/common';
+import { AppController } from './app.controller';
+import { AppService } from './app.service';
+import { DatabaseModule } from './database/database.module';
+import { UserModule } from './user/user.module';
+import { AuthModule } from './auth/auth.module';
+
+@Module({
+  imports: [DatabaseModule, UserModule, AuthModule],
+  controllers: [AppController],
+  providers: [AppService],
+})
+export class AppModule {}
--- a/backend/src/app.service.ts
+++ b/backend/src/app.service.ts
@@ -0,0 +1,8 @@
+import { Injectable } from '@nestjs/common';
+
+@Injectable()
+export class AppService {
+  getHello(): string {
+    return 'Hello World!';
+  }
+}
--- a/backend/src/auth/auth.controller.spec.ts
+++ b/backend/src/auth/auth.controller.spec.ts
@@ -0,0 +1,18 @@
+import { Test, TestingModule } from '@nestjs/testing';
+import { AuthController } from './auth.controller';
+
+describe('AuthController', () => {
+  let controller: AuthController;
+
+  beforeEach(async () => {
+    const module: TestingModule = await Test.createTestingModule({
+      controllers: [AuthController],
+    }).compile();
+
+    controller = module.get<AuthController>(AuthController);
+  });
+
+  it('should be defined', () => {
+    expect(controller).toBeDefined();
+  });
+});
--- a/backend/src/auth/auth.controller.ts
+++ b/backend/src/auth/auth.controller.ts
@@ -0,0 +1,34 @@
+import {
+  Body,
+  Controller,
+  Get,
+  HttpCode,
+  HttpStatus,
+  Post,
+  UseGuards,
+  Request,
+} from '@nestjs/common';
+import { AuthService } from './auth.service';
+import { AuthGuard } from './auth.guard';
+
+@Controller('auth')
+export class AuthController {
+  constructor(private authService: AuthService) {}
+  @HttpCode(HttpStatus.OK)
+  @Post()
+  async signIn(@Body() signInDto: { name: string; password: string }) {
+    const { token } = await this.authService.signIn(
+      signInDto.name,
+      signInDto.password,
+    );
+    return {
+      accessToken: token,
+    };
+  }
+
+  @UseGuards(AuthGuard)
+  @Get('profile')
+  getProfile(@Request() req) {
+    return req.user;
+  }
+}
--- a/backend/src/auth/auth.guard.spec.ts
+++ b/backend/src/auth/auth.guard.spec.ts
@@ -0,0 +1,7 @@
+import { AuthGuard } from './auth.guard';
+
+describe('AuthGuard', () => {
+  it('should be defined', () => {
+    expect(new AuthGuard()).toBeDefined();
+  });
+});
--- a/backend/src/auth/auth.guard.ts
+++ b/backend/src/auth/auth.guard.ts
@@ -0,0 +1,39 @@
+import {
+  CanActivate,
+  ExecutionContext,
+  Injectable,
+  UnauthorizedException,
+} from '@nestjs/common';
+import { JwtService } from '@nestjs/jwt';
+import { JWT_SECRET } from '../consts';
+import { AuthUser } from './auth.service';
+
+@Injectable()
+export class AuthGuard implements CanActivate {
+  constructor(private jwtService: JwtService) {}
+
+  async canActivate(context: ExecutionContext): Promise<boolean> {
+    const request = context.switchToHttp().getRequest();
+    const token = this.extractTokenFromHeader(request);
+    if (!token) {
+      throw new UnauthorizedException();
+    }
+    try {
+      const payload = await this.jwtService.verifyAsync(token, {
+        secret: JWT_SECRET,
+      });
+      // 💡 We're assigning the payload to the request object here
+      // so that we can access it in our route handlers
+      request['user'] = payload as AuthUser;
+    } catch {
+      throw new UnauthorizedException();
+    }
+    return true;
+  }
+
+  private extractTokenFromHeader(request: Request): string | undefined {
+    const [type, token] =
+      (request.headers as any).authorization?.split(' ') ?? [];
+    return type === 'Bearer' ? token : undefined;
+  }
+}
--- a/backend/src/auth/auth.module.ts
+++ b/backend/src/auth/auth.module.ts
@@ -0,0 +1,20 @@
+import { Module } from '@nestjs/common';
+import { AuthController } from './auth.controller';
+import { AuthService } from './auth.service';
+import { UserModule } from '../user/user.module';
+import { JwtModule } from '@nestjs/jwt';
+import { JWT_SECRET } from 'src/consts';
+
+@Module({
+  imports: [
+    UserModule,
+    JwtModule.register({
+      global: true,
+      secret: JWT_SECRET,
+      signOptions: { expiresIn: '1d' },
+    }),
+  ],
+  controllers: [AuthController],
+  providers: [AuthService],
+})
+export class AuthModule {}
--- a/backend/src/auth/auth.service.spec.ts
+++ b/backend/src/auth/auth.service.spec.ts
@@ -0,0 +1,18 @@
+import { Test, TestingModule } from '@nestjs/testing';
+import { AuthService } from './auth.service';
+
+describe('AuthService', () => {
+  let service: AuthService;
+
+  beforeEach(async () => {
+    const module: TestingModule = await Test.createTestingModule({
+      providers: [AuthService],
+    }).compile();
+
+    service = module.get<AuthService>(AuthService);
+  });
+
+  it('should be defined', () => {
+    expect(service).toBeDefined();
+  });
+});
--- a/backend/src/auth/auth.service.ts
+++ b/backend/src/auth/auth.service.ts
@@ -0,0 +1,45 @@
+import { Injectable, UnauthorizedException } from '@nestjs/common';
+import { UserService } from '../user/user.service';
+import { JwtService } from '@nestjs/jwt';
+
+interface AccessTokenPayload {
+  sub: string;
+  name: string;
+  isAdmin: boolean;
+}
+
+@Injectable()
+export class AuthService {
+  constructor(
+    private userService: UserService,
+    private jwtService: JwtService,
+  ) {}
+
+  async signIn(
+    name: string,
+    password: string,
+  ): Promise<{
+    token: string;
+  }> {
+    const user = await this.userService.findOneByName(name);
+
+    if (!(user && user.password === password)) {
+      throw new UnauthorizedException();
+    }
+
+    const payload: AccessTokenPayload = {
+      sub: user.id,
+      name: user.name,
+      isAdmin: user.isAdmin,
+    };
+
+    return {
+      token: await this.jwtService.signAsync(payload),
+    };
+  }
+}
+export type AuthUser = {
+  id: string;
+  name: string;
+  isAdmin: boolean;
+};
--- a/backend/src/consts.ts
+++ b/backend/src/consts.ts
@@ -0,0 +1 @@
+export const JWT_SECRET = 'secret';
--- a/backend/src/database/database.module.ts
+++ b/backend/src/database/database.module.ts
@@ -0,0 +1,8 @@
+import { Module } from '@nestjs/common';
+import { databaseProviders } from './database.providers';
+
+@Module({
+  providers: [...databaseProviders],
+  exports: [...databaseProviders],
+})
+export class DatabaseModule {}
--- a/backend/src/database/database.providers.ts
+++ b/backend/src/database/database.providers.ts
@@ -0,0 +1,19 @@
+import { DataSource } from 'typeorm';
+
+export const DATA_SOURCE = 'DATA_SOURCE';
+
+export const databaseProviders = [
+  {
+    provide: DATA_SOURCE,
+    useFactory: async () => {
+      const dataSource = new DataSource({
+        type: 'sqlite',
+        database: './reiverr.sqlite',
+        entities: [__dirname + '/../**/*.entity{.ts,.js}'],
+        synchronize: true,
+      });
+
+      return dataSource.initialize();
+    },
+  },
+];
--- a/backend/src/main.ts
+++ b/backend/src/main.ts
@@ -0,0 +1,9 @@
+import { NestFactory } from '@nestjs/core';
+import { AppModule } from './app.module';
+import 'reflect-metadata';
+
+async function bootstrap() {
+  const app = await NestFactory.create(AppModule);
+  await app.listen(3000);
+}
+bootstrap();
--- a/backend/src/user/user.controller.spec.ts
+++ b/backend/src/user/user.controller.spec.ts
@@ -0,0 +1,18 @@
+import { Test, TestingModule } from '@nestjs/testing';
+import { UserController } from './user.controller';
+
+describe('UserController', () => {
+  let controller: UserController;
+
+  beforeEach(async () => {
+    const module: TestingModule = await Test.createTestingModule({
+      controllers: [UserController],
+    }).compile();
+
+    controller = module.get<UserController>(UserController);
+  });
+
+  it('should be defined', () => {
+    expect(controller).toBeDefined();
+  });
+});
--- a/backend/src/user/user.controller.ts
+++ b/backend/src/user/user.controller.ts
@@ -0,0 +1,62 @@
+import {
+  Body,
+  Controller,
+  Get,
+  HttpCode,
+  HttpStatus,
+  NotFoundException,
+  Param,
+  Post,
+  UseGuards,
+  Request,
+} from '@nestjs/common';
+import { UserService } from './user.service';
+import { AuthGuard } from '../auth/auth.guard';
+import { AuthUser } from 'src/auth/auth.service';
+
+@Controller('user')
+export class UserController {
+  constructor(private userService: UserService) {}
+
+  @UseGuards(AuthGuard)
+  @Get()
+  async getProfile(@Request() req) {
+    const user = await this.userService.findOne((req.user as AuthUser).id);
+
+    if (!user) {
+      throw new NotFoundException();
+    }
+
+    return user;
+  }
+
+  @Get(':id')
+  async findById(@Param('id') id: string) {
+    const user = await this.userService.findOne(id);
+
+    if (!user) {
+      throw new NotFoundException();
+    }
+
+    return user;
+  }
+
+  @HttpCode(HttpStatus.OK)
+  @Post()
+  async create(
+    @Body()
+    userCreateDto: {
+      name: string;
+      password: string;
+      isAdmin?: boolean;
+    },
+  ) {
+    const canCreateAdmin = await this.userService.noPreviousAdmins();
+
+    return this.userService.create(
+      userCreateDto.name,
+      userCreateDto.password,
+      canCreateAdmin && userCreateDto.isAdmin,
+    );
+  }
+}
--- a/backend/src/user/user.entity.ts
+++ b/backend/src/user/user.entity.ts
@@ -0,0 +1,75 @@
+import { Column, Entity, PrimaryGeneratedColumn } from 'typeorm';
+
+const DEFAULT_SETTINGS = {
+  autoplayTrailers: true,
+  language: 'en',
+  animationDuration: 300,
+  // discover: {
+  // 	region: 'US',
+  // 	excludeLibraryItems: true,
+  // 	includedLanguages: 'en'
+  // },
+  sonarr: {
+    apiKey: '',
+    baseUrl: '',
+    qualityProfileId: 0,
+    rootFolderPath: '',
+    languageProfileId: 0,
+  },
+  radarr: {
+    apiKey: '',
+    baseUrl: '',
+    qualityProfileId: 0,
+    rootFolderPath: '',
+  },
+  jellyfin: {
+    apiKey: '',
+    baseUrl: '',
+    userId: '',
+  },
+};
+
+@Entity()
+export class User {
+  @PrimaryGeneratedColumn('uuid')
+  id: string;
+
+  @Column({ unique: true })
+  name: string;
+
+  @Column()
+  password: string;
+
+  @Column()
+  isAdmin: boolean = false;
+
+  @Column('json', { default: JSON.stringify(DEFAULT_SETTINGS) })
+  settings: {
+    autoplayTrailers: boolean;
+    language: string;
+    animationDuration: number;
+    // discover: {
+    // 	region: string,
+    // 	excludeLibraryItems: true,
+    // 	includedLanguages: 'en'
+    // },
+    sonarr: {
+      apiKey: string;
+      baseUrl: string;
+      qualityProfileId: number;
+      rootFolderPath: string;
+      languageProfileId: number;
+    };
+    radarr: {
+      apiKey: string;
+      baseUrl: string;
+      qualityProfileId: number;
+      rootFolderPath: string;
+    };
+    jellyfin: {
+      apiKey: string;
+      baseUrl: string;
+      userId: string;
+    };
+  } = DEFAULT_SETTINGS;
+}
--- a/backend/src/user/user.module.ts
+++ b/backend/src/user/user.module.ts
@@ -0,0 +1,13 @@
+import { Module } from '@nestjs/common';
+import { UserService } from './user.service';
+import { userProviders } from './user.providers';
+import { DatabaseModule } from 'src/database/database.module';
+import { UserController } from './user.controller';
+
+@Module({
+  imports: [DatabaseModule],
+  providers: [...userProviders, UserService],
+  controllers: [UserController],
+  exports: [UserService],
+})
+export class UserModule {}
--- a/backend/src/user/user.providers.ts
+++ b/backend/src/user/user.providers.ts
@@ -0,0 +1,13 @@
+import { DATA_SOURCE } from 'src/database/database.providers';
+import { DataSource } from 'typeorm';
+import { User } from './user.entity';
+
+export const USER_REPOSITORY = 'USER_REPOSITORY';
+
+export const userProviders = [
+  {
+    provide: USER_REPOSITORY,
+    useFactory: (dataSource: DataSource) => dataSource.getRepository(User),
+    inject: [DATA_SOURCE],
+  },
+];
--- a/backend/src/user/user.service.spec.ts
+++ b/backend/src/user/user.service.spec.ts
@@ -0,0 +1,18 @@
+import { Test, TestingModule } from '@nestjs/testing';
+import { UserService } from './user.service';
+
+describe('UserService', () => {
+  let service: UserService;
+
+  beforeEach(async () => {
+    const module: TestingModule = await Test.createTestingModule({
+      providers: [UserService],
+    }).compile();
+
+    service = module.get<UserService>(UserService);
+  });
+
+  it('should be defined', () => {
+    expect(service).toBeDefined();
+  });
+});
--- a/backend/src/user/user.service.ts
+++ b/backend/src/user/user.service.ts
@@ -0,0 +1,48 @@
+import { Inject, Injectable } from '@nestjs/common';
+import { Repository } from 'typeorm';
+import { User } from './user.entity';
+
+@Injectable()
+export class UserService {
+  constructor(
+    @Inject('USER_REPOSITORY')
+    private readonly userRepository: Repository<User>,
+  ) {}
+
+  async findAll(): Promise<User[]> {
+    return this.userRepository.find();
+  }
+
+  async findOne(id: string): Promise<User> {
+    return this.userRepository.findOne({ where: { id } });
+  }
+
+  async findOneByName(name: string): Promise<User> {
+    return this.userRepository.findOne({ where: { name } });
+  }
+
+  async create(name: string, password: string, isAdmin = false): Promise<User> {
+    const user = this.userRepository.create();
+    user.name = name;
+    // TODO: Hash password
+    user.password = password;
+    user.isAdmin = isAdmin;
+    return this.userRepository.save(user);
+  }
+
+  async update(user: User): Promise<User> {
+    return this.userRepository.save(user);
+  }
+
+  async remove(id: number): Promise<void> {
+    await this.userRepository.delete(id);
+  }
+
+  async noPreviousAdmins(): Promise<boolean> {
+    const adminCount = await this.userRepository.count({
+      where: { isAdmin: true },
+    });
+
+    return adminCount === 0;
+  }
+}
--- a/backend/test/app.e2e-spec.ts
+++ b/backend/test/app.e2e-spec.ts
@@ -0,0 +1,24 @@
+import { Test, TestingModule } from '@nestjs/testing';
+import { INestApplication } from '@nestjs/common';
+import * as request from 'supertest';
+import { AppModule } from './../src/app.module';
+
+describe('AppController (e2e)', () => {
+  let app: INestApplication;
+
+  beforeEach(async () => {
+    const moduleFixture: TestingModule = await Test.createTestingModule({
+      imports: [AppModule],
+    }).compile();
+
+    app = moduleFixture.createNestApplication();
+    await app.init();
+  });
+
+  it('/ (GET)', () => {
+    return request(app.getHttpServer())
+      .get('/')
+      .expect(200)
+      .expect('Hello World!');
+  });
+});
--- a/backend/test/jest-e2e.json
+++ b/backend/test/jest-e2e.json
@@ -0,0 +1,9 @@
+{
+  "moduleFileExtensions": ["js", "json", "ts"],
+  "rootDir": ".",
+  "testEnvironment": "node",
+  "testRegex": ".e2e-spec.ts$",
+  "transform": {
+    "^.+\\.(t|j)s$": "ts-jest"
+  }
+}
--- a/backend/tsconfig.build.json
+++ b/backend/tsconfig.build.json
@@ -0,0 +1,4 @@
+{
+  "extends": "./tsconfig.json",
+  "exclude": ["node_modules", "test", "dist", "**/*spec.ts"]
+}
--- a/backend/tsconfig.json
+++ b/backend/tsconfig.json
@@ -0,0 +1,22 @@
+{
+  "compilerOptions": {
+    "module": "commonjs",
+    "declaration": true,
+    "removeComments": true,
+    "emitDecoratorMetadata": true,
+    "experimentalDecorators": true,
+    "allowSyntheticDefaultImports": true,
+    "target": "ES2021",
+    "sourceMap": true,
+    "outDir": "./dist",
+    "baseUrl": "./",
+    "incremental": true,
+    "skipLibCheck": true,
+    "strictNullChecks": false,
+    "noImplicitAny": false,
+    "strictBindCallApply": false,
+    "forceConsistentCasingInFileNames": false,
+    "noFallthroughCasesInSwitch": false,
+    "lib": ["es6"]
+  },
+}