getRemoveStream () : Observable<any> {
return this.notesstream
.filter(change => {return change.deleted})
.map (change => { return change.id; });
}
export function observeCurrentValueFor<T>(changes$: Observable<{ [key: string]: SimpleChange }>, propertyName: string) {
return changes$
.filter(changes => !!changes[propertyName])
.map<T>(changes => changes[propertyName].currentValue);
}
getUserNotesstream ( username : string ) : Observable<any> {
return this.notesstream
.filter(change => {return change.doc.type === 'note' && change.doc.username === username})
.map (change => { return change.doc });
}
subscribe(eventName, callback) {
let subscriber: Subscription = this.observable.filter((event) => {
return event.name === eventName;
}).subscribe(callback);
return subscriber;
}