<?php

namespace App\Http\Middleware;

use Closure;
use Carbon\Carbon;

class SetUserTimezone
{
    public function handle($request, Closure $next)
    {
        // Priority:
        // 1. Request header
        // 2. Session
        // 3. Default (UTC)

        $timezone =
            $request->header('timezone')
            ?? session('user_timezone')
            ?? 'UTC'; 

        // Set globally for Carbon
        config(['app.user_timezone' => $timezone]);
        Carbon::setLocale(config('app.locale'));

        return $next($request);
    }
}