public function then($fulfilledHandler = null, $errorHandler = null, $progressHandler = null)
{
if (null !== $this->completed) {
return $this->completed->then($fulfilledHandler, $errorHandler, $progressHandler);
}
$deferred = new static();
if (is_callable($progressHandler)) {
$progHandler = function ($update) use($deferred, $progressHandler) {
try {
$deferred->progress(call_user_func($progressHandler, $update));
} catch (Exception $e) {
$deferred->progress($e);
}
};
} else {
if (null !== $progressHandler) {
trigger_error('Invalid $progressHandler argument passed to then(), must be null or callable.', E_USER_NOTICE);
}
$progHandler = array($deferred, 'progress');
}
$this->handlers[] = function ($promise) use($fulfilledHandler, $errorHandler, $deferred, $progHandler) {
$promise->then($fulfilledHandler, $errorHandler)->then(array($deferred, 'resolve'), array($deferred, 'reject'), $progHandler);
};
$this->progressHandlers[] = $progHandler;
return $deferred->promise();
}
public function then($fulfilledHandler = null, $errorHandler = null, $progressHandler = null)
{
if (null !== $this->completed) {
return $this->completed->then($fulfilledHandler, $errorHandler, $progressHandler);
}
$deferred = new static();
if ($progressHandler) {
$progHandler = function ($update) use($deferred, $progressHandler) {
try {
$deferred->progress(call_user_func($progressHandler, $update));
} catch (\Exception $e) {
$deferred->progress($e);
}
};
} else {
$progHandler = array($deferred, 'progress');
}
$this->handlers[] = function ($promise) use($fulfilledHandler, $errorHandler, $deferred, $progHandler) {
$promise->then($fulfilledHandler, $errorHandler)->then(array($deferred, 'resolve'), array($deferred, 'reject'), $progHandler);
};
$this->progressHandlers[] = $progHandler;
return $deferred->promise();
}