Tester.php

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<?php


namespace BristolSU\Support\Permissions\Contracts;


use BristolSU\ControlDB\Contracts\Models\Group;
use BristolSU\ControlDB\Contracts\Models\Role;
use BristolSU\ControlDB\Contracts\Models\User;
use BristolSU\Support\Permissions\Contracts\Models\Permission;

abstract class Tester
{

    private $successor = null;
    

    public function setNext(?Tester $tester = null)
    {
        $this->successor = $tester;
    }

    public function handle(Permission $permission, ?User $user, ?Group $group, ?Role $role)
    {
        $result = $this->can($permission, $user, $group, $role);
        if ($result === null && $this->successor !== null) {
            return $this->successor->handle($permission, $user, $group, $role);
        }
        return $result;
    }

    abstract public function can(Permission $permission, ?User $user, ?Group $group, ?Role $role): ?bool;
}