PermissionManager.php

<?php
 
/*
 *
 *  ____            _        _   __  __ _                  __  __ ____
 * |  _ \ ___   ___| | _____| |_|  \/  (_)_ __   ___      |  \/  |  _ \
 * | |_) / _ \ / __| |/ / _ \ __| |\/| | | '_ \ / _ \_____| |\/| | |_) |
 * |  __/ (_) | (__|   <  __/ |_| |  | | | | | |  __/_____| |  | |  __/
 * |_|   \___/ \___|_|\_\___|\__|_|  |_|_|_| |_|\___|     |_|  |_|_|
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * @author PocketMine Team
 * @link http://www.pocketmine.net/
 *
 *
 */
 
declare(strict_types=1);
 
namespace pocketmine\permission;
 
use function count;
use function spl_object_id;
 
class PermissionManager{
    private static ?self $instance = null;
 
    public static function getInstance() : PermissionManager{
        if(self::$instance === null){
            self::$instance = new self();
        }
 
        return self::$instance;
    }
 
    protected array $permissions = [];
    protected array $permSubs = [];
 
    public function getPermission(string $name) : ?Permission{
        return $this->permissions[$name] ?? null;
    }
 
    public function addPermission(Permission $permission) : bool{
        if(!isset($this->permissions[$permission->getName()])){
            $this->permissions[$permission->getName()] = $permission;
 
            return true;
        }
 
        return false;
    }
 
    public function removePermission(Permission|string $permission) : void{
        if($permission instanceof Permission){
            unset($this->permissions[$permission->getName()]);
        }else{
            unset($this->permissions[$permission]);
        }
    }
 
    public function subscribeToPermission(string $permission, PermissibleInternal $permissible) : void{
        if(!isset($this->permSubs[$permission])){
            $this->permSubs[$permission] = [];
        }
        $this->permSubs[$permission][spl_object_id($permissible)] = $permissible;
    }
 
    public function unsubscribeFromPermission(string $permission, PermissibleInternal $permissible) : void{
        if(isset($this->permSubs[$permission][spl_object_id($permissible)])){
            if(count($this->permSubs[$permission]) === 1){
                unset($this->permSubs[$permission]);
            }else{
                unset($this->permSubs[$permission][spl_object_id($permissible)]);
            }
        }
    }
 
    public function unsubscribeFromAllPermissions(PermissibleInternal $permissible) : void{
        foreach($this->permSubs as $permission => $subs){
            if(count($subs) === 1 && isset($subs[spl_object_id($permissible)])){
                unset($this->permSubs[$permission]);
            }else{
                unset($this->permSubs[$permission][spl_object_id($permissible)]);
            }
        }
    }
 
    public function getPermissionSubscriptions(string $permission) : array{
        return $this->permSubs[$permission] ?? [];
    }
 
    public function getPermissions() : array{
        return $this->permissions;
    }
 
    public function clearPermissions() : void{
        $this->permissions = [];
    }
}