JsonErrorHandler

JsonErrorHandler.php

<?php

declare(strict_types = 1);

namespace Application\ErrorHandler;

use Psr\Http\Message\ResponseInterface as Response;
use Psr\Http\Message\ServerRequestInterface as Request;
use Psr\Log\LoggerInterface;
use Zend\Diactoros\Response\JsonResponse;
use Zend\Stratigility\ErrorMiddlewareInterface;

class JsonErrorHandler implements ErrorMiddlewareInterface
{
    private $logger;

    public function __construct(LoggerInterface $logger)
    {
        $this->logger = $logger;
    }

    public function __invoke($error, Request $request, Response $response, callable $out = null) : Response
    {
        if ($error instanceof \Throwable) {
            $status = $response->getReasonPhrase() ? $error->getCode() : 400;

            // Ensure a valid HTTP status
            if (! is_numeric($status)
                || ($status < 400)
                || ($status > 599)
            ) {
                $status = 500;
            }

            $response = new JsonResponse([], $status);
            $errors   = [
                'errors' => [
                    'status' => $status,
                    'title'  => $response->getReasonPhrase() ?: 'Bad Request',
                    'detail' => $error->getMessage(),
                    'links'  => [
                        'related' => 'http://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html'
                    ]
                ]
            ];

            $this->logger->critical('Error ({code}): {message} in {file}:{line}', [
                'code'    => $error->getCode(),
                'message' => $error->getMessage(),
                'file'    => $error->getFile(),
                'line'    => $error->getLine(),
            ]);

            return new JsonResponse($errors, $response->getStatusCode());
        }

        return $out($request, $response, $error);
    }
}