Phred/src/Http/Support/DefaultRequestIdProvider.php

<?php
declare(strict_types=1);

namespace Phred\Http\Support;

use Nyholm\Psr7\Response;
use Phred\Http\Contracts\RequestIdProviderInterface;
use Psr\Http\Message\ServerRequestInterface;

final class DefaultRequestIdProvider implements RequestIdProviderInterface
{
    public function provide(ServerRequestInterface $request): string
    {
        $incoming = $request->getHeaderLine('X-Request-Id');
        if ($incoming !== '') {
            return $incoming;
        }
        return bin2hex(random_bytes(8));
    }
}