<?php

namespace App\Exception\Handler;

use Hyperf\ExceptionHandler\ExceptionHandler;
use Hyperf\HttpMessage\Stream\SwooleStream;
use Hyperf\Validation\ValidationException;
use Psr\Http\Message\ResponseInterface;
use Throwable;

/**
 * 自定义验证器输出
 */
class ValidationExceptionHandler extends ExceptionHandler
{
    /**
     * handle.
     * @param Throwable $throwable
     * @param ResponseInterface $response
     * @return ResponseInterface
     */
    public function handle(Throwable $throwable, ResponseInterface $response)
    {
        $this->stopPropagation();
        /** @var \Hyperf\Validation\ValidationException $throwable */
        $keys = $throwable->validator->errors()->keys();
        if (count($keys) > 0) {
            $msg = $keys[0] . str_replace("validation", "", $throwable->validator->errors()->first($keys[0]));
        } else {
            $msg = $throwable->validator->errors()->first();
        }
        if (!$response->hasHeader('content-type')) {
            $response = $response->withAddedHeader('content-type', 'application/json; charset=utf-8');
        }
        return $response->withStatus(200)->withBody(new SwooleStream(json_encode(['code'=>1,'msg'=>$msg])));
    }

    /**
     * 验证之后
     * @param Throwable $throwable
     * @return bool
     */
    public function isValid(Throwable $throwable): bool
    {
        return $throwable instanceof ValidationException;
    }
}