/**
* Merges an observable sequence of observables into an observable sequence.
*
* @param ObservableInterface $observables
*
* @return ObserverInterface
*/
public static function mergeAll(ObservableInterface $sources)
{
// todo: add scheduler
return new AnonymousObservable(function ($observer, $scheduler) use($sources) {
$group = new CompositeDisposable();
$isStopped = false;
$sourceSubscription = new SingleAssignmentDisposable();
$group->add($sourceSubscription);
$sourceSubscription->setDisposable($sources->subscribeCallback(function ($innerSource) use(&$group, &$isStopped, $observer, &$scheduler) {
$innerSubscription = new SingleAssignmentDisposable();
$group->add($innerSubscription);
$innerSubscription->setDisposable($innerSource->subscribeCallback(function ($nextValue) use($observer) {
$observer->onNext($nextValue);
}, function ($error) use($observer) {
$observer->onError($error);
}, function () use(&$group, &$innerSubscription, &$isStopped, $observer) {
$group->remove($innerSubscription);
if ($isStopped && $group->count() === 1) {
$observer->onCompleted();
}
}, $scheduler));
}, function ($error) use($observer) {
$observer->onError($error);
}, function () use(&$group, &$isStopped, $observer) {
$isStopped = true;
if ($group->count() === 1) {
$observer->onCompleted();
}
}, $scheduler));
return $group;
});
}
