Cachet/app/Http/Middleware/Timezone.php

<?php

/*
 * This file is part of Cachet.
 *
 * (c) Alt Three Services Limited
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace CachetHQ\Cachet\Http\Middleware;

use Closure;
use Illuminate\Contracts\Config\Repository;
use Illuminate\Http\Request;

/**
 * This is the timezone middleware class.
 *
 * @author James Brooks <james@alt-three.com>
 * @author Graham Campbell <james@alt-three.com>
 */
class Timezone
{
    /**
     * The config repository instance.
     *
     * @var \Illuminate\Contracts\Config\Repository
     */
    protected $config;

    /**
     * Creates a new timezone middleware instance.
     *
     * @param \Illuminate\Contracts\Config\Repository $config
     *
     * @return void
     */
    public function __construct(Repository $config)
    {
        $this->config = $config;
    }

    /**
     * Handle an incoming request.
     *
     * @param \Illuminate\Http\Request $request
     * @param \Closure                 $next
     *
     * @return mixed
     */
    public function handle(Request $request, Closure $next)
    {
        if ($tz = $request->header('Time-Zone')) {
            $this->config->set('cachet.timezone', $tz);
        }

        return $next($request);
    }
}