利用PHP trait DTO构建可测试的数据传输层

trait UserDTO
{
    private $id;
    private $username;
    private $email;
    
    public function getId(): ?int
    {
        return $this->id;
    }
    
    public function setUsername(string $username): void
    {
        $this->username = $username;
    }
    
    public function getUsername(): ?string
    {
        return $this->username;
    }
    
    public function setEmail(string $email): void
    {
        $this->email = $email;
    }
    
    public function getEmail(): ?string
    {
        return $this->email;
    }
}

class UserController
{
    public function register(Request $request)
    {
        // 通过DTO传递数据
        $userDTO = new UserDTO();
        $userDTO->setUsername($request->input('username'));
        $userDTO->setEmail($request->input('email'));
        
        // 验证数据
        $validator = Validator::make($request->all(), [
            'username' => 'required',
            'email' => 'required|email',
        ]);
        
        if ($validator->fails()) {
            // 验证失败，返回错误信息
            return response()->json(['error' => $validator->errors()], 400);
        }
        
        // 数据验证通过，继续处理逻辑
        // ...
    }
}