I have a service in Angular 5 which exposes a BehaviorSubject. It needs to
track a dynamic array of inner subscriptions, that come and go on the fly
and each, once active, can be "on" or "off" (true/false, whatever). My
exposed subject should return all values (or, well, just an OR of all
values, if any is on, my whole service is on). I'm not sure how to do this
with merge and switchmap and other rx operators.
Example:
@Injectable() class MyService {
results$: BehaviorSubject<any> = new BehaviorSubject<any>(false);
callers: any[] = [];
getSubject() {
const subject = new Subject();
callers.push(subject);
// TODO: Now what? How to tell result$ to listen to this new one too?
subject.finally(() = {
// TODO: Now what? How to kick it out of the array when complete, and
tell results$?
});
return subject;
}
Any pointers on how to achieve this?
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