liwo/app/Listeners/TaskCreateNotif.php

<?php

namespace App\Listeners;

use App\Events\TaskCreate;
use App\Models\Task;
use App\Models\User;
use App\Utilities\HelperClass\NotificationHelper;

class TaskCreateNotif
{
    /**
     * @var NotificationHelper
     */
    public $helper;

    /**
     * Create the event listener.
     *
     * @return void
     */
    public function __construct(NotificationHelper $helper)
    {
        $this->helper = $helper;
    }

    /**
     * Handle the event.
     *
     * @param  TaskCreate  $event
     * @return void
     */
    public function handle(TaskCreate $event)
    {
        $payload = $event->message;

        if ($payload->data->original->assignee_id !== null) {
            $this->assigneeNotifHandler($payload);
        }
        if ($payload->data->original->approver_id !== null) {
            $this->approverNotifHandler($payload);
        }
    }

    public function assigneeNotifHandler($payload) {
        $user = User::findOrFail($payload->data->original->assignee_id);
        $task = Task::findOrFail($payload->data->original->id);

        $this->helper->makeNotif($payload, 'assignee', ['task' => $task->title])
            ->sendNotifications($user, 'critical');
    }

    public function approverNotifHandler($payload) {
        $user = User::findOrFail($payload->data->original->approver_id);
        $task = Task::findOrFail($payload->data->original->id);

        $this->helper->makeNotif($payload, 'approver', ['task' => $task->title])
            ->sendNotifications($user, 'critical');
    }
}