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<?php
namespace ipl\Scheduler\Common;
use ArrayObject;
use InvalidArgumentException;
use Ramsey\Uuid\UuidInterface;
use React\Promise\PromiseInterface;
use SplObjectStorage;
trait Promises
{
/** @var SplObjectStorage<UuidInterface, ArrayObject<int, PromiseInterface>> */
protected $promises;
/**
* Add the given promise for the specified UUID
*
* **Example Usage:**
*
* ```php
* $promise = work();
* $promises->addPromise($uuid, $promise);
* ```
*
* @param UuidInterface $uuid
* @param PromiseInterface $promise
*
* @return $this
*/
protected function addPromise(UuidInterface $uuid, PromiseInterface $promise): self
{
if (! $this->promises->contains($uuid)) {
$this->promises->attach($uuid, new ArrayObject());
}
$this->promises[$uuid][] = $promise;
return $this;
}
/**
* Remove the given promise for the specified UUID
*
* **Example Usage:**
*
* ```php
* $promise->always(function () use ($uuid, $promise) {
* $promises->removePromise($uuid, $promise);
* })
* ```
*
* @param UuidInterface $uuid
* @param PromiseInterface $promise
*
* @return $this
*
* @throws InvalidArgumentException If the given UUID doesn't have any registered promises or when the specified
* UUID promises doesn't contain the provided promise
*/
protected function removePromise(UuidInterface $uuid, PromiseInterface $promise): self
{
if (! $this->promises->contains($uuid)) {
throw new InvalidArgumentException(
sprintf('There are no registered promises for UUID %s', $uuid->toString())
);
}
foreach ($this->promises[$uuid] as $k => $v) {
if ($v === $promise) {
unset($this->promises[$uuid][$k]);
return $this;
}
}
throw new InvalidArgumentException(
sprintf('There is no such promise for UUID %s', $uuid->toString())
);
}
/**
* Detach and return promises for the given UUID, if any
*
* **Example Usage:**
*
* ```php
* foreach ($promises->detachPromises($uuid) as $promise) {
* $promise->cancel();
* }
* ```
*
* @param UuidInterface $uuid
*
* @return PromiseInterface[]
*/
protected function detachPromises(UuidInterface $uuid): array
{
if (! $this->promises->contains($uuid)) {
return [];
}
$promises = $this->promises[$uuid];
$this->promises->detach($uuid);
return $promises->getArrayCopy();
}
}
|
