firefly-iii/app/controllers/ReminderController.php

<?php

/**
 * Class ReminderController
 *
 */
class ReminderController extends BaseController
{

    public function __construct()
    {
        View::share('title', 'Reminders');
        View::share('mainTitleIcon', 'fa-lightbulb-o');
    }

    /**
     * @param Reminder $reminder
     */
    public function show(Reminder $reminder)
    {
        //        $subTitle = $reminder->title;
        //        $model = null; // related model.
        //
        //        if(isset($reminder->data->model) && isset($reminder->data->type)) {
        //            switch($reminder->data->type) {
        //                case 'Test':
        //                    break;
        //                case 'Piggybank':
        //                    break;
        //                default:
        //                    throw new FireflyException('Cannot handle model of type '.$reminder->data->model);
        //                    break;
        //            }
        //        } else {
        //
        //        }
        //
        $amount = null;
        if (get_class($reminder->remindersable) == 'Piggybank') {
            /** @var \FireflyIII\Shared\Toolkit\Reminders $toolkit */
            $reminderKit = App::make('FireflyIII\Shared\Toolkit\Reminders');

            $amount = $reminderKit->amountForReminder($reminder);
        }

        return View::make('reminders.show', compact('reminder', 'amount'));
    }
}