add auth and user handling

src/controllers/AuthController.ts

@@ -0,0 +1,38 @@
+import { UserRepository } from "../repositories/UserRepository";
+import { encrypt } from "../utils/encryptionUtils";
+import { ValidationError, UnauthorizedError } from "../errors/httpErrors";
+import { UserDto } from "../dtos/UserDto";
+import { UserDtoEntityMapper } from "../mappers/UserDtoEntityMapper";
+
+export class AuthController {
+  constructor(
+    private userRepository: UserRepository,
+    private mapper: UserDtoEntityMapper
+  ) {}
+
+  async login(userName: string, password: string): Promise<{ token: string; user: UserDto }> {
+    if (!userName || !password) {
+      throw new ValidationError("Username and password are required");
+    }
+
+    // Find user by userName
+    const user = await this.userRepository.findByUserName(userName);
+    // Compare password
+    const passwordMatches = encrypt.comparepassword(user.password, password);
+    if (!passwordMatches || !user ) {
+      throw new UnauthorizedError("Invalid username or password");
+    }
+
+    // Create JWT
+    const token = encrypt.generateToken({
+      id: user.id,
+      userName: user.userName,
+      role: user.role,
+    });
+
+    return {
+      token,
+      user: this.mapper.toDto(user),
+    };
+  }
+}