API request validator concept

APIRequest.php

<?php

class APIRequest extends FormRequest
{
    public function response(array $errors)
    {
        if ($this->ajax() || $this->wantsJson())
        {
            return new JsonResponse($errors, $this->responseCode());
        }
    }
	
    protected function responseCode()
    {
        return 422;
    }
}

SomeEndpointRequest.php

<?php

class SomeEndpointRequest extends APIRequest
{
    protected function responseCode()
    {
        return 417;
    }
    
    public function rules()
    {
        ...
    }
    
    public function messages()
    {
        ...
    }
}