adds roles

client/app.jsx

@@ -6,6 +6,8 @@ import { AuthContext } from './utils/auth_context';
 import { useApi } from './utils/use_api';
 import { useJwtRefresh } from './utils/use_jwt_refresh';
 import './app.css';
+import { RolesContext } from './utils/roles_context';
+import { parseJwt } from './utils/parse_jwt';
 
 export const App = () => {
   const [authToken, setAuthToken] = useState(null);
@@ -26,16 +28,21 @@ export const App = () => {
     setLoading(false);
   }, []);
 
-  // before displaying anything try getting a token using cookies,
+  const jwtPayload = parseJwt(authToken);
+  console.log(jwtPayload);
+
+  // don't display anything while trying to get user token
   // can display a loading screen here if desired
   if (loading) return null;
 
   return (
     <AuthContext.Provider value={[authToken, setAuthToken]}>
       <ApiContext.Provider value={api}>
+        <RolesContext.Provider value={jwtPayload.roles}>
           <HashRouter>
             <Router />
           </HashRouter>
+        </RolesContext.Provider>
       </ApiContext.Provider>
     </AuthContext.Provider>
   );

client/components/admin/_admin.jsx

@@ -0,0 +1,21 @@
+import { useState, useContext, useEffect } from 'react';
+import { ApiContext } from '../../utils/api_context';
+
+export const Admin = () => {
+  const [users, setUsers] = useState([]);
+  const api = useContext(ApiContext);
+
+  useEffect(async () => {
+    const { users } = await api.get('/users');
+    setUsers(users);
+  }, []);
+
+  return (
+    <div className="p-4">
+      <h2 className="text-3xl">Users</h2>
+      {users.map((user) => (
+        <div>{user.name}</div>
+      ))}
+    </div>
+  );
+};

client/components/home/_home.jsx

@@ -1,10 +1,16 @@
 import { useContext, useEffect, useState } from 'react';
+import { useNavigate } from 'react-router';
 import { ApiContext } from '../../utils/api_context';
 import { AuthContext } from '../../utils/auth_context';
+import { RolesContext } from '../../utils/roles_context';
+import { Button } from '../common/button';
 
 export const Home = () => {
   const [, setAuthToken] = useContext(AuthContext);
   const api = useContext(ApiContext);
+  const roles = useContext(RolesContext);
+
+  const navigate = useNavigate();
 
   const [loading, setLoading] = useState(true);
   const [user, setUser] = useState(null);
@@ -26,11 +32,16 @@ export const Home = () => {
   }
 
   return (
-    <div>
+    <div className="p-4">
       <h1>Welcome {user.name}</h1>
-      <button type="button" onClick={logout}>
+      <Button type="button" onClick={logout}>
         Logout
-      </button>
+      </Button>
+      {roles.includes('admin') && (
+        <Button type="button" onClick={() => navigate('/admin')}>
+          Admin
+        </Button>
+      )}
     </div>
   );
 };

client/components/router.jsx

@@ -4,6 +4,7 @@ import { Home } from './home/_home';
 import { AuthContext } from '../utils/auth_context';
 import { SignIn } from './sign_in/_sign_in';
 import { SignUp } from './sign_up/_sign_up';
+import { Admin } from './admin/_admin';
 
 export const Router = () => {
   const [authToken] = useContext(AuthContext);
@@ -14,6 +15,7 @@ export const Router = () => {
         path="/"
         element={authToken ? <Home /> : <Navigate replace to="signin" />} // no token means not logged in
       />
+      <Route path="admin" element={<Admin />} />
       <Route path="signin" element={<SignIn />} />
       <Route path="signup" element={<SignUp />} />
     </Routes>

client/utils/parse_jwt.js

@@ -0,0 +1,5 @@
+export const parseJwt = (token) => {
+  if (!token) return {};
+  const jwtPayload = JSON.parse(window.atob(token.split('.')[1]));
+  return jwtPayload;
+};

client/utils/roles_context.js

@@ -0,0 +1,3 @@
+import { createContext } from 'react';
+
+export const RolesContext = createContext({});

package.json

@@ -36,11 +36,13 @@
     "@nestjs/platform-express": "^8.0.0",
     "@nestjs/serve-static": "^2.2.2",
     "@nestjs/typeorm": "^8.0.2",
+    "@types/lodash": "^4.14.177",
     "bcrypt": "^5.0.1",
     "cookie-parser": "^1.4.6",
     "dotenv": "^10.0.0",
     "hbs": "^4.1.2",
     "jsonwebtoken": "^8.5.1",
+    "lodash": "^4.17.21",
     "morgan": "^1.10.0",
     "pg": "^8.7.1",
     "reflect-metadata": "^0.1.13",

server/app.controller.ts

@@ -1,8 +1,11 @@
 import { Controller, Get, Render } from '@nestjs/common';
+import { Skip } from './decorators/skip.decorator';
+import { AuthGuard } from './providers/guards/auth.guard';
 
 @Controller()
 export class AppController {
   @Get()
   @Render('index')
+  @Skip(AuthGuard)
   index() {}
 }

server/app.module.ts

@@ -1,13 +1,24 @@
 import { Module } from '@nestjs/common';
+import { APP_GUARD } from '@nestjs/core';
 import { TypeOrmModule } from '@nestjs/typeorm';
 import { AppController } from './app.controller';
 import { config } from './database/config';
 import { UsersModule } from './modules/users.module';
+import { AuthGuard } from './providers/guards/auth.guard';
+import { RolesGuard } from './providers/guards/roles.guard';
 import { JwtService } from './providers/services/jwt.service';
+import { RolesService } from './providers/services/roles.service';
+import { UsersService } from './providers/services/users.service';
 
 @Module({
   imports: [TypeOrmModule.forRoot(config), UsersModule],
   controllers: [AppController],
-  providers: [JwtService],
+  providers: [
+    UsersService,
+    RolesService,
+    JwtService,
+    { provide: APP_GUARD, useClass: AuthGuard }, // auth guard should come before roles guard
+    { provide: APP_GUARD, useClass: RolesGuard }, // otherwise users won't be authenticated before roles check
+  ],
 })
 export class AppModule {}

server/controllers/refresh_tokens.controller.ts

@@ -4,14 +4,18 @@ import { UsersService } from 'server/providers/services/users.service';
 import { SignInDto } from 'server/dto/sign_in.dto';
 import { RefreshTokenBody } from 'server/dto/refresh_token_body.dto';
 import { JwtService } from 'server/providers/services/jwt.service';
+import { Skip } from 'server/decorators/skip.decorator';
+import { AuthGuard } from 'server/providers/guards/auth.guard';
+import { RolesService } from 'server/providers/services/roles.service';
 
 // this is kind of a misnomer because we are doing token based auth
 // instead of session based auth
 @Controller()
 export class RefreshTokensController {
-  constructor(private usersService: UsersService, private jwtService: JwtService) {}
+  constructor(private usersService: UsersService, private rolesService: RolesService, private jwtService: JwtService) {}
 
   @Get('/refresh_token')
+  @Skip(AuthGuard)
   async get(@Body() body: SignInDto, @Req() req: Request) {
     const refreshToken: string = req.cookies['_refresh_token'];
     if (!refreshToken) {
@@ -20,13 +24,15 @@ export class RefreshTokensController {
 
     const tokenBody = this.jwtService.parseRefreshToken(refreshToken) as RefreshTokenBody;
 
-    const user = await this.usersService.find(tokenBody.userId, ['refreshTokens']);
+    const user = await this.usersService.find(tokenBody.userId, ['refreshTokens', 'userRoles']);
+    const userRoles = await this.rolesService.findByIds(user.userRoles.map((ur) => ur.roleId));
+
     const userRefreshToken = user.refreshTokens.find((t) => t.id === tokenBody.id);
     if (!userRefreshToken) {
       throw new HttpException('User refresh token not found', 401);
     }
 
-    const token = this.jwtService.issueToken({ userId: user.id });
+    const token = this.jwtService.issueToken({ userId: user.id, roles: userRoles.map((r) => r.key) });
     return { token };
   }
 }

server/controllers/sessions.controller.ts

@@ -5,6 +5,9 @@ import { SignInDto } from 'server/dto/sign_in.dto';
 import { JwtService } from 'server/providers/services/jwt.service';
 import { RefreshTokensService } from 'server/providers/services/refresh_tokens.service';
 import { RefreshToken } from 'server/entities/refresh_token.entity';
+import { Skip } from 'server/decorators/skip.decorator';
+import { AuthGuard } from 'server/providers/guards/auth.guard';
+import { RolesService } from 'server/providers/services/roles.service';
 
 // this is kind of a misnomer because we are doing token based auth
 // instead of session based auth
@@ -13,10 +16,12 @@ export class SessionsController {
   constructor(
     private usersService: UsersService,
     private jwtService: JwtService,
+    private rolesService: RolesService,
     private refreshTokenService: RefreshTokensService,
   ) {}
 
   @Post('/sessions')
+  @Skip(AuthGuard)
   async create(@Body() body: SignInDto, @Res({ passthrough: true }) res: Response) {
     const { verified, user } = await this.usersService.verify(body.email, body.password);
 
@@ -32,8 +37,10 @@ export class SessionsController {
       // generate new refresh token
     }
 
+    const userRoles = await this.rolesService.findByIds(user.userRoles.map((ur) => ur.roleId));
+
     // JWT gets sent with response
-    const token = this.jwtService.issueToken({ userId: user.id });
+    const token = this.jwtService.issueToken({ userId: user.id, roles: userRoles.map((r) => r.key) });
 
     const refreshJwtToken = this.jwtService.issueRefreshToken({ id: refreshToken.id, userId: user.id });
 

server/controllers/users.controller.ts

@@ -2,36 +2,53 @@ import { Body, Controller, Get, HttpException, HttpStatus, Post, Res, UseGuards
 import * as bcrypt from 'bcrypt';
 import { Response } from 'express';
 import { JwtBody } from 'server/decorators/jwt_body.decorator';
+import { Roles } from 'server/decorators/roles.decorator';
+import { Skip } from 'server/decorators/skip.decorator';
 import { CreateUserDto } from 'server/dto/create_user.dto';
 import { JwtBodyDto } from 'server/dto/jwt_body.dto';
 import { RefreshToken } from 'server/entities/refresh_token.entity';
+import { RoleKey } from 'server/entities/role.entity';
 import { User } from 'server/entities/user.entity';
+import { UserRole } from 'server/entities/user_role.entity';
 import { AuthGuard } from 'server/providers/guards/auth.guard';
 import { JwtService } from 'server/providers/services/jwt.service';
 import { RefreshTokensService } from 'server/providers/services/refresh_tokens.service';
+import { RolesService } from 'server/providers/services/roles.service';
 import { UsersService } from 'server/providers/services/users.service';
 
 @Controller()
 export class UsersController {
   constructor(
     private usersService: UsersService,
+    private rolesService: RolesService,
     private jwtService: JwtService,
     private refreshTokenService: RefreshTokensService,
   ) {}
 
+  @Get('/users')
+  @Roles(RoleKey.ADMIN)
+  async index() {
+    const users = await this.usersService.findAll();
+    return { users };
+  }
+
   @Get('/users/me')
-  @UseGuards(AuthGuard)
   async getCurrentUser(@JwtBody() jwtBody: JwtBodyDto) {
     const user = await this.usersService.find(jwtBody.userId);
     return { user };
   }
 
   @Post('/users')
+  @Skip(AuthGuard)
   async create(@Body() userPayload: CreateUserDto, @Res({ passthrough: true }) res: Response) {
     const newUser = new User();
     newUser.email = userPayload.email;
     newUser.name = userPayload.name;
     newUser.passwordHash = await bcrypt.hash(userPayload.password, 10);
+    const [role] = await this.rolesService.findByKey(RoleKey.USER);
+    const userRole = new UserRole();
+    userRole.role = role;
+    newUser.userRoles = [userRole];
 
     try {
       const user = await this.usersService.create(newUser);
@@ -39,9 +56,11 @@ export class UsersController {
       const newRefreshToken = new RefreshToken();
       newRefreshToken.user = user;
       const refreshToken = await this.refreshTokenService.create(newRefreshToken);
-
       // issue jwt and refreshJwtToken
-      const token = this.jwtService.issueToken({ userId: user.id });
+      // note the roles hard coded to just USER.
+      // If you want to allow users to sign up as different roles then
+      // you will need to update this here.
+      const token = this.jwtService.issueToken({ userId: user.id, roles: [RoleKey.USER] });
       const refreshJwtToken = this.jwtService.issueRefreshToken({ id: refreshToken.id, userId: user.id });
 
       // only refresh token should go in the cookie

server/database/seeds.ts

@@ -1,7 +1,7 @@
 import { Factory, Seeder } from 'typeorm-seeding';
-import { Connection, Db } from 'typeorm';
+import { Connection } from 'typeorm';
 import { User } from '../entities/user.entity';
-import { Role } from '../entities/role.entity';
+import { Role, RoleKey } from '../entities/role.entity';
 import * as dotenv from 'dotenv';
 import * as bcrypt from 'bcrypt';
 import { UserRole } from '../entities/user_role.entity';
@@ -11,6 +11,7 @@ export default class Seeds implements Seeder {
   public async run(factory: Factory, connection: Connection): Promise<any> {
     // CREATE ROLES
     console.log('\nCreating Roles');
+
     const roleObjects = Role.ROLES.map((key) => ({ key }));
     const roleRepository = connection.getRepository(Role);
     for (const roleObj of roleObjects) {
@@ -26,10 +27,9 @@ export default class Seeds implements Seeder {
 
     // CREATE ADMIN USER
     const userRepository = connection.getRepository(User);
-    const userRoleRepository = connection.getRepository(UserRole);
     let adminUser = await userRepository.findOne({ email: process.env.ADMIN_EMAIL });
     if (!adminUser) {
-      const adminRole = await roleRepository.findOne({ key: Role.ADMIN });
+      const adminRole = await roleRepository.findOne({ key: RoleKey.ADMIN });
       console.log(`\nCreating Admin User with email ${process.env.ADMIN_EMAIL}`);
       console.log(adminRole);
       const passwordHash = await bcrypt.hash(process.env.ADMIN_PASSWORD, 10);

server/decorators/roles.decorator.ts

@@ -0,0 +1,5 @@
+import { SetMetadata } from '@nestjs/common';
+import { RoleKey } from 'server/entities/role.entity';
+
+export const ROLES_CONTEXT_KEY = 'roles';
+export const Roles = (...roles: RoleKey[]) => SetMetadata(ROLES_CONTEXT_KEY, roles);

server/decorators/skip.decorator.ts

@@ -0,0 +1,5 @@
+import { CanActivate, SetMetadata } from '@nestjs/common';
+import { Class } from 'server/dto/class.dto';
+
+export const SKIP_KEY = 'skip';
+export const Skip = (...guards: Class<CanActivate>[]) => SetMetadata(SKIP_KEY, guards);

server/dto/class.dto.ts

@@ -0,0 +1 @@
+export type Class<T> = { new (...args: any[]): T };

server/dto/jwt_body.dto.ts

@@ -1,3 +1,6 @@
+import { RoleKey } from 'server/entities/role.entity';
+
 export interface JwtBodyDto {
   userId: number;
+  roles: RoleKey[];
 }

server/entities/role.entity.ts

@@ -1,20 +1,21 @@
 import { Entity, PrimaryGeneratedColumn, OneToMany, Column } from 'typeorm';
 import { UserRole } from './user_role.entity';
 
+// Make sure to add aditional roles here then reseed
+export enum RoleKey {
+  ADMIN = 'admin',
+  USER = 'user',
+}
+
 @Entity()
 export class Role {
-  static ADMIN = 'admin';
-  static USER = 'user';
-
-  // make sure add additional roles to this arraylist as it
-  // will be used during seeds to initiallize all roles.
-  static ROLES = [Role.ADMIN, Role.USER];
+  static ROLES = [RoleKey.ADMIN, RoleKey.USER];
 
   @PrimaryGeneratedColumn()
   id: number;
 
   @Column()
-  key: string;
+  key: RoleKey;
 
   @OneToMany(() => UserRole, (userRole) => userRole.role)
   userRoles: UserRole[];

server/entities/user_role.entity.ts

@@ -1,4 +1,4 @@
-import { Entity, PrimaryGeneratedColumn, ManyToOne } from 'typeorm';
+import { Entity, PrimaryGeneratedColumn, ManyToOne, Column } from 'typeorm';
 import { Role } from './role.entity';
 import { User } from './user.entity';
 
@@ -7,6 +7,12 @@ export class UserRole {
   @PrimaryGeneratedColumn()
   id: number;
 
+  @Column()
+  roleId: number;
+
+  @Column()
+  userId: number;
+
   @ManyToOne(() => Role, (role) => role.userRoles)
   role: Role;
 

server/modules/users.module.ts

@@ -8,10 +8,14 @@ import { RefreshTokensService } from '../providers/services/refresh_tokens.servi
 import { RefreshToken } from 'server/entities/refresh_token.entity';
 import { JwtService } from 'server/providers/services/jwt.service';
 import { RefreshTokensController } from 'server/controllers/refresh_tokens.controller';
+import { Role } from 'server/entities/role.entity';
+import { RolesService } from 'server/providers/services/roles.service';
+import { UserRole } from 'server/entities/user_role.entity';
 
 @Module({
-  imports: [TypeOrmModule.forFeature([User, RefreshToken])],
+  imports: [TypeOrmModule.forFeature([User, RefreshToken, Role, UserRole])],
   controllers: [SessionsController, UsersController, RefreshTokensController],
-  providers: [UsersService, RefreshTokensService, JwtService],
+  providers: [UsersService, RolesService, RefreshTokensService, JwtService],
+  exports: [TypeOrmModule],
 })
 export class UsersModule {}

server/providers/guards/auth.guard.ts

@@ -1,13 +1,28 @@
 import { Injectable, CanActivate, ExecutionContext } from '@nestjs/common';
 import { JwtService } from '../services/jwt.service';
+import { SKIP_KEY } from 'server/decorators/skip.decorator';
+import { Reflector } from '@nestjs/core';
+import { Class } from 'server/dto/class.dto';
 
 @Injectable()
 export class AuthGuard implements CanActivate {
-  constructor(private jwtService: JwtService) {}
+  constructor(private reflector: Reflector, private jwtService: JwtService) {}
 
   canActivate(context: ExecutionContext) {
+    const skippedGuards = this.reflector.getAllAndOverride<Class<CanActivate>[]>(SKIP_KEY, [
+      context.getHandler(),
+      context.getClass(),
+    ]);
+    if (skippedGuards) {
+      const skippedGuard = skippedGuards.find((guard) => this instanceof guard);
+      if (skippedGuard) {
+        return true;
+      }
+    }
     const req = context.switchToHttp().getRequest();
     const authHeader = req.headers.authorization;
+    if (!authHeader) return false;
+
     const jwt = authHeader.split(' ')[1];
     try {
       req.jwtBody = this.jwtService.parseToken(jwt);

server/providers/guards/roles.guard.ts

@@ -0,0 +1,37 @@
+import { Injectable, CanActivate, ExecutionContext } from '@nestjs/common';
+import { Reflector } from '@nestjs/core';
+import { ROLES_CONTEXT_KEY } from 'server/decorators/roles.decorator';
+import { JwtBodyDto } from 'server/dto/jwt_body.dto';
+import { RoleKey } from 'server/entities/role.entity';
+import { RolesService } from '../services/roles.service';
+import { UsersService } from '../services/users.service';
+import { some } from 'lodash';
+
+@Injectable()
+export class RolesGuard implements CanActivate {
+  constructor(private reflector: Reflector, private usersService: UsersService, private rolesService: RolesService) {}
+
+  async canActivate(context: ExecutionContext): Promise<boolean> {
+    const requiredRoles = this.reflector.getAllAndOverride<RoleKey[]>(ROLES_CONTEXT_KEY, [
+      context.getHandler(),
+      context.getClass(),
+    ]);
+    console.log(requiredRoles);
+
+    if (!requiredRoles) {
+      return true;
+    }
+
+    const jwtBody: JwtBodyDto = context.switchToHttp().getRequest().jwtBody;
+
+    if (!jwtBody) return false; // unauthenticated users are not authorized
+
+    const user = await this.usersService.find(jwtBody.userId, ['userRoles']);
+    const roles = await this.rolesService.findByKey(...requiredRoles);
+    const roleMatches = user.userRoles.map((userRole) => {
+      return !!roles.find((role) => role.id === userRole.roleId);
+    });
+
+    return some(roleMatches);
+  }
+}

server/providers/services/roles.service.ts

@@ -0,0 +1,25 @@
+import { Injectable } from '@nestjs/common';
+import { InjectRepository } from '@nestjs/typeorm';
+import { In, Repository } from 'typeorm';
+import * as bcrypt from 'bcrypt';
+import { Role, RoleKey } from 'server/entities/role.entity';
+
+@Injectable()
+export class RolesService {
+  constructor(
+    @InjectRepository(Role)
+    private rolesRepository: Repository<Role>,
+  ) {}
+
+  findByKey(...keys: RoleKey[]) {
+    return this.rolesRepository.find({ where: { key: In(keys) } });
+  }
+
+  findByIds(ids: number[]) {
+    return this.rolesRepository.findByIds(ids);
+  }
+
+  find(id: number, relations: string[] = []) {
+    return this.rolesRepository.findOne(id, { relations });
+  }
+}

server/providers/services/users.service.ts

@@ -11,6 +11,10 @@ export class UsersService {
     private usersRespository: Repository<User>,
   ) {}
 
+  findAll(relations: string[] = []) {
+    return this.usersRespository.find({ relations });
+  }
+
   findBy(options: Record<string, any>, relations: string[] = []) {
     return this.usersRespository.findOne(options, { relations });
   }
@@ -24,7 +28,7 @@ export class UsersService {
   }
 
   async verify(email: string, password: string) {
-    const user = await this.usersRespository.findOne({ email }, { relations: ['refreshTokens'] });
+    const user = await this.usersRespository.findOne({ email }, { relations: ['refreshTokens', 'userRoles'] });
     if (!user) return { verified: false, user: null };
     const verified: boolean = await bcrypt.compare(password, user.passwordHash);
     return { verified, user: verified ? user : null };

tsconfig.json

@@ -16,6 +16,6 @@
     "noImplicitAny": false,
     "strictBindCallApply": false,
     "forceConsistentCasingInFileNames": false,
-    "noFallthroughCasesInSwitch": false
+    "noFallthroughCasesInSwitch": false,
   }
 }

yarn.lock

@@ -896,6 +896,11 @@
   resolved "https://registry.yarnpkg.com/@types/json5/-/json5-0.0.29.tgz#ee28707ae94e11d2b827bcbe5270bcea7f3e71ee"
   integrity sha1-7ihweulOEdK4J7y+UnC86n8+ce4=
 
+"@types/lodash@^4.14.177":
+  version "4.14.177"
+  resolved "https://registry.yarnpkg.com/@types/lodash/-/lodash-4.14.177.tgz#f70c0d19c30fab101cad46b52be60363c43c4578"
+  integrity sha512-0fDwydE2clKe9MNfvXHBHF9WEahRuj+msTuQqOmAApNORFvhMYZKNGGJdCzuhheVjMps/ti0Ak/iJPACMaevvw==
+
 "@types/mime@^1":
   version "1.3.2"
   resolved "https://registry.yarnpkg.com/@types/mime/-/mime-1.3.2.tgz#93e25bf9ee75fe0fd80b594bc4feb0e862111b5a"