cssd-back/app/Policies/TransferPolicy.php

<?php

namespace App\Policies;

use App\Models\Item;
use App\Models\Package;
use App\Models\Transfer;
use App\Models\User;

class TransferPolicy
{
    public function changeStatus(User $user, Transfer $transfer)
    {
        if ($user->hasRole('Admin|Supervisor') || $transfer->user_id == $user->id)
            return true;
    }

    public function transferItem(User $user, Item $Item)
    {
        if(is_null($Item->package_id)){
            if ($user->hasRole('Admin')) {
                return true;
            } else {
                if ($user->hasRole('Supervisor')) {
                    if ($Item->user->medical_center_id == $user->medical_center_id) {
                        return true;
                    }
                } else {
                    if ($Item->user_id == $user->id) {
                        return true;
                    }
                }
            }
        } else {
            return false;
        }
    }

    public function transferPackage(User $user, Package $Package)
    {
        if ($user->hasRole('Admin')) {
            return true;
        } else {
            if ($user->hasRole('Supervisor')) {
                if ($Package->user->medical_center_id == $user->medical_center_id) {
                    return true;
                }
            } else {
                if ($Package->user_id == $user->id) {
                    return true;
                }
            }
        }
    }

}