Laravel Middleware - Set Locale from request and session

SetLocale.php

<?php

namespace App\Http\Middleware;

use Closure;
use Illuminate\Http\Request;

class SetLocale
{
    /**
     * Handle an incoming request.
     *
     * @param  \Illuminate\Http\Request  $request
     * @param  \Closure  $next
     * @return mixed
     */
    public function handle(Request $request, Closure $next)
    {
        /* set locale from request param */
        if ($request->has('locale')) {

            $locale = in_array(strtolower($request->locale), ['en', 'id']) ? strtolower($request->locale) : 'id';

            session()->put('locale', $locale );
        }

        /* set locale from session */
        if (session()->has('locale')) {

            app()->setLocale(session('locale'));
        }

        return $next($request);
    }
}