auth checkpoint

auth dependecies not instaled in dev container

backend/src/modules/auth/auth.service.ts

@@ -0,0 +1,80 @@
+import { Injectable } from '@nestjs/common';
+import { JwtService } from '@nestjs/jwt';
+import { UserService } from '../users/user.service';
+import { CreateUserDto, LoginUserDto } from '../users/user.dto';
+import { AuthResponse, JwtPayload } from './types';
+import { UserRole } from '../entities';
+
+@Injectable()
+export class AuthService {
+  constructor(
+    private userService: UserService,
+    private jwtService: JwtService,
+  ) {}
+
+  async validateUser(
+    username: string,
+    password: string,
+  ): Promise<{
+    id: string;
+    username: string;
+    email: string;
+    role: string;
+  } | null> {
+    return this.userService.validateUser(username, password);
+  }
+
+  async login(loginUserDto: LoginUserDto): Promise<AuthResponse> {
+    const user = await this.validateUser(
+      loginUserDto.username,
+      loginUserDto.password,
+    );
+    if (!user) {
+      throw new Error('Invalid credentials');
+    }
+
+    const payload: JwtPayload = {
+      sub: user.id,
+      username: user.username,
+      email: user.email,
+      role: user.role as UserRole,
+    };
+
+    return {
+      access_token: this.jwtService.sign(payload),
+      user: {
+        id: user.id,
+        username: user.username,
+        email: user.email,
+        role: user.role as UserRole,
+      },
+    };
+  }
+
+  async register(createUserDto: CreateUserDto): Promise<AuthResponse> {
+    // Default new users to USER role
+    const userDto = {
+      ...createUserDto,
+      role: UserRole.USER,
+    };
+
+    const user = await this.userService.create(userDto);
+
+    const payload: JwtPayload = {
+      sub: user.id,
+      username: user.username,
+      email: user.email,
+      role: user.role,
+    };
+
+    return {
+      access_token: this.jwtService.sign(payload),
+      user: {
+        id: user.id,
+        username: user.username,
+        email: user.email,
+        role: user.role,
+      },
+    };
+  }
+}