mirror of
https://github.com/pmmp/PocketMine-MP.git
synced 2025-05-24 22:44:45 +00:00
624495f4d3
I anticipate increasing demand for promises, and since all the libraries I could find suck, we'll stick to our own impl for now.
94 lines
2.2 KiB
PHP
94 lines
2.2 KiB
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\utils;
|
|
|
|
use function spl_object_id;
|
|
|
|
/**
|
|
* @phpstan-template TValue
|
|
*/
|
|
final class Promise{
|
|
/**
|
|
* @var \Closure[]
|
|
* @phpstan-var array<int, \Closure(TValue) : void>
|
|
*/
|
|
private array $onSuccess = [];
|
|
|
|
/**
|
|
* @var \Closure[]
|
|
* @phpstan-var array<int, \Closure() : void>
|
|
*/
|
|
private array $onFailure = [];
|
|
|
|
private bool $resolved = false;
|
|
|
|
/**
|
|
* @var mixed
|
|
* @phpstan-var TValue|null
|
|
*/
|
|
private $result = null;
|
|
|
|
/**
|
|
* @phpstan-param \Closure(TValue) : void $onSuccess
|
|
* @phpstan-param \Closure() : void $onFailure
|
|
*/
|
|
public function onCompletion(\Closure $onSuccess, \Closure $onFailure) : void{
|
|
if($this->resolved){
|
|
$this->result === null ? $onFailure() : $onSuccess($this->result);
|
|
}else{
|
|
$this->onSuccess[spl_object_id($onSuccess)] = $onSuccess;
|
|
$this->onFailure[spl_object_id($onFailure)] = $onFailure;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @param mixed $value
|
|
* @phpstan-param TValue $value
|
|
*/
|
|
public function resolve($value) : void{
|
|
if($this->resolved){
|
|
throw new \InvalidStateException("Promise has already been resolved/rejected");
|
|
}
|
|
$this->resolved = true;
|
|
$this->result = $value;
|
|
foreach($this->onSuccess as $c){
|
|
$c($value);
|
|
}
|
|
$this->onSuccess = [];
|
|
$this->onFailure = [];
|
|
}
|
|
|
|
public function reject() : void{
|
|
if($this->resolved){
|
|
throw new \InvalidStateException("Promise has already been resolved/rejected");
|
|
}
|
|
$this->resolved = true;
|
|
foreach($this->onFailure as $c){
|
|
$c();
|
|
}
|
|
$this->onSuccess = [];
|
|
$this->onFailure = [];
|
|
}
|
|
}
|