surveyor_indonesia_backend/app/Models/UserToActivity.php

<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Model;
use App\Models\Activity;
use Illuminate\Support\Facades\DB;

class UserToActivity extends Model
{
    protected $table = 'assign_hr_to_activity';

    const CREATED_AT = 'created_at';
    const UPDATED_AT = 'updated_at';

    protected $fillable = [
        'user_id',
        'proyek_id',
        'version_gantt_id',
        'role_proyek_id',
        'activity_id',
        'start_date',
        'end_date',
        'created_at',
        'created_by',
        'updated_at',
        'updated_by'
    ];

	public static function boot() {
		parent::boot();

        DB::transaction(function(){
            static::created(function($data) {
                $activity = Activity::find($data->activity_id);
                $getWorkingHours = UserToProyek::where([['user_id', $data->user_id],['proyek_id', $activity->proyek_id]])->first();
                $salary = 0;
                if($getWorkingHours->uom_standart_rate == "Hour") {
                    $salary = (doubleval($getWorkingHours->standart_rate) * 8) * (int)$activity->duration * ($getWorkingHours->max_used / 100);
                } else {
                    $salary = (doubleval($getWorkingHours->standart_rate) * (int)$activity->duration) * ($getWorkingHours->max_used / 100);
                }
                $activity->rencana_biaya += doubleval($salary);
                $activity->save();
            });

            static::deleted(function($data) {
                $activity = Activity::find($data->activity_id);
                $getWorkingHours = UserToProyek::where([['user_id', $data->user_id],['proyek_id', $activity->proyek_id]])->first();
                $salary = 0;
                if($getWorkingHours->uom_standart_rate == "Hour"){
                    $salary = (doubleval($getWorkingHours->standart_rate) * 8) * (int)$activity->duration * ($getWorkingHours->max_used / 100);
                } else {
                    $salary = (doubleval($getWorkingHours->standart_rate) * (int)$activity->duration) * ($getWorkingHours->max_used / 100);
                }
                $activity->rencana_biaya -= doubleval($salary);

                if ($activity->rencana_biaya < 0) {
                    $activity->rencana_biaya = 0;
                }
                $activity->save();
            });
        }, 5);
	}

}