jandl-taskmanager-app/be/app/Observers/SubTaskObserver.php

<?php

namespace App\Observers;

use App\Events\SubTaskCreated;
use App\Events\SubTaskDeleted;
use App\Models\SubTask;

class SubTaskObserver
{
    /**
     * Handle the SubTask "created" event.
     *
     * @param  \App\Models\SubTask  $subTask
     * @return void
     */
    public function created(SubTask $subTask)
    {
        SubTaskCreated::dispatch($subTask);
    }

    public function updating(SubTask $subTask)
    {
        // to prevent updating created_by field. this field cannot be updated once created.
        $subTask->created_by = $subTask->getOriginal('created_by');

        $subTask->tracked_time = $subTask->timesheets->sum('time');
    }

    /**
     * Handle the SubTask "updated" event.
     *
     * @param  \App\Models\SubTask  $subTask
     * @return void
     */
    public function updated(SubTask $subTask)
    {
        $subTask->mastertask->recalculateEstimatedTime();
        $subTask->mastertask->recalculateTrackedTime();
    }

    /**
     * Handle the SubTask "deleted" event.
     *
     * @param  \App\Models\SubTask  $subTask
     * @return void
     */
    public function deleted(SubTask $subTask)
    {
        SubTaskDeleted::dispatch($subTask);
    }

    /**
     * Handle the SubTask "restored" event.
     *
     * @param  \App\Models\SubTask  $subTask
     * @return void
     */
    public function restored(SubTask $subTask)
    {
        //
    }

    /**
     * Handle the SubTask "force deleted" event.
     *
     * @param  \App\Models\SubTask  $subTask
     * @return void
     */
    public function forceDeleted(SubTask $subTask)
    {
        //
    }
}