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This commit is contained in:
Valentin Mihai 2022-10-18 15:41:16 +03:00
parent d1fbfd78c9
commit 401e6a047f
1 changed files with 16 additions and 2 deletions
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18
src/lib/services/entities-map.service.ts
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@ -1,6 +1,6 @@
import { Injectable } from '@angular/core';
import { BehaviorSubject, Observable, Subject } from 'rxjs';
import { filter, startWith } from 'rxjs/operators';
import { BehaviorSubject, Observable, Subject, switchMap } from 'rxjs';
import { filter, map, startWith } from 'rxjs/operators';
import { Entity } from '../listing';
import { RequiredParam, shareLast, Validate } from '../utils';
import { Id } from '../listing/models/trackable';
@ -11,6 +11,7 @@ export abstract class EntitiesMapService<Interface, Class extends Entity<Interfa
protected readonly _map = new Map<Id, BehaviorSubject<Class[]>>();
readonly #entityChanged$ = new Subject<Class>();
readonly #entitiesChanged$ = new BehaviorSubject<boolean>(false);
readonly #entityDeleted$ = new Subject<Class>();
get empty(): boolean {
@ -68,6 +69,10 @@ export abstract class EntitiesMapService<Interface, Class extends Entity<Interfa
// Emit observables only after entities have been updated
if(changedEntities.length || deletedEntities.length) {
this.#entitiesChanged$.next(true);
}
for (const entity of changedEntities) {
this.#entityChanged$.next(entity);
}
@ -105,6 +110,15 @@ export abstract class EntitiesMapService<Interface, Class extends Entity<Interfa
);
}
@Validate()
watchChanged$(@RequiredParam() key: Id): Observable<boolean> {
return this.#entityChanged$.pipe(
startWith(this.get(key)),
map(entities => entities as Class[]),
map(entities => !!entities.length)
);
}
watchDeleted$(entityId: Id): Observable<Class> {
return this.#entityDeleted$.pipe(filter(entity => entity.id === entityId));
}