firefly-iii/app/Http/Middleware/Reminders.php

<?php

namespace FireflyIII\Http\Middleware;

use App;
use Carbon\Carbon;
use Closure;
use FireflyIII\Models\PiggyBank;
use FireflyIII\Models\Reminder;
use FireflyIII\Support\CacheProperties;
use FireflyIII\User;
use Illuminate\Contracts\Auth\Guard;
use Illuminate\Http\Request;
use View;

/**
 * Class Reminders
 *
 * @package FireflyIII\Http\Middleware
 */
class Reminders
{
    /**
     * The Guard implementation.
     *
     * @var Guard
     */
    protected $auth;

    /**
     * Create a new filter instance.
     *
     * @param  Guard $auth
     *
     */
    public function __construct(Guard $auth)
    {
        $this->auth = $auth;
    }

    /**
     * Handle an incoming request.
     *
     * @param  \Illuminate\Http\Request $request
     * @param  \Closure                 $next
     *
     * @return mixed
     */
    public function handle(Request $request, Closure $next)
    {


        $user = $this->auth->user();
        if ($this->auth->check() && !$request->isXmlHttpRequest() && $user instanceof User) {
            // do reminders stuff.

            // abuse CacheProperties to find out if we need to do this:
            $cache = new CacheProperties;

            $cache->addProperty('reminders');
            if ($cache->has()) {
                $reminders = $cache->get();
                View::share('reminders', $reminders);

                return $next($request);
            }

            $piggyBanks = $user->piggyBanks()->where('remind_me', 1)->get();

            /** @var \FireflyIII\Helpers\Reminders\ReminderHelperInterface $helper */
            $helper = App::make('FireflyIII\Helpers\Reminders\ReminderHelperInterface');

            /** @var PiggyBank $piggyBank */
            foreach ($piggyBanks as $piggyBank) {
                $helper->createReminders($piggyBank, new Carbon);
            }
            // delete invalid reminders
            // this is a construction SQLITE cannot handle :(
            if (env('DB_CONNECTION') != 'sqlite') {
                Reminder::whereUserId($user->id)->leftJoin('piggy_banks', 'piggy_banks.id', '=', 'remindersable_id')->whereNull('piggy_banks.id')->delete();
            }

            // get and list active reminders:
            $reminders = $user->reminders()->today()->get();
            $reminders->each(
                function (Reminder $reminder) use ($helper) {
                    $reminder->description = $helper->getReminderText($reminder);
                }
            );
            $cache->store($reminders);
            View::share('reminders', $reminders);
        }

        return $next($request);
    }
}