feat: generate jwt on login

src/auth/auth.controller.ts

@@ -1,14 +1,17 @@
 import { Controller, Post, UseGuards, Request } from '@nestjs/common';
 import { LocalAuthGuard } from './local-auth.guard';
+import { AuthService } from './auth.service';
 
 @Controller({
   path: 'auth',
   version: '1',
 })
 export class AuthController {
+  constructor(private authService: AuthService) {}
+
   @UseGuards(LocalAuthGuard)
   @Post('login')
   async login(@Request() req) {
-    return req.user;
+    return this.authService.login(req.user);
   }
 }

src/auth/auth.module.ts

@@ -4,9 +4,24 @@ import { UsersModule } from '../users/users.module';
 import { PassportModule } from '@nestjs/passport';
 import { LocalStrategy } from './local.strategy';
 import { AuthController } from './auth.controller';
+import { JwtModule } from '@nestjs/jwt';
+import { ConfigModule, ConfigService } from '@nestjs/config';
 
 @Module({
-  imports: [UsersModule, PassportModule],
+  imports: [
+    UsersModule,
+    PassportModule,
+    JwtModule.registerAsync({
+      imports: [ConfigModule],
+      inject: [ConfigService],
+      useFactory: (configService: ConfigService) => {
+        return {
+          secret: configService.get<string>('secret'),
+          signOptions: { expiresIn: '1d' },
+        };
+      },
+    }),
+  ],
   providers: [AuthService, LocalStrategy],
   controllers: [AuthController],
 })

src/auth/auth.service.ts

@@ -1,10 +1,14 @@
 import { Injectable } from '@nestjs/common';
 import { UsersService } from '../users/users.service';
 import { hashPassword } from '../helper/hash_password';
+import { JwtService } from '@nestjs/jwt';
 
 @Injectable()
 export class AuthService {
-  constructor(private usersService: UsersService) {}
+  constructor(
+    private usersService: UsersService,
+    private jwtService: JwtService,
+  ) {}
 
   async validateUser(username: string, pass: string): Promise<any> {
     const user = await this.usersService.findOneByUsername(username);
@@ -17,4 +21,15 @@ export class AuthService {
 
     return null;
   }
+
+  async login(user: any) {
+    const payload = {
+      username: user.username,
+      sub: user.userId,
+    };
+
+    return {
+      access_token: this.jwtService.sign(payload),
+    };
+  }
 }