@obsidize/rx-map/maps/rx-entity-map.js

ES6 Map with rxjs extensions for change detection

import { map, filter, startWith } from 'rxjs/operators';
import { forKey, forKeyIn, pluckValue } from '../common/operators';
import { identity } from '../common/utility';
import { EntityMap } from './entity-map';
import { RxMap } from './rx-map';
/**
 * Combinatory entity map that uses an RxMap as the store.
 */
export class RxEntityMap extends EntityMap {
    constructor(selectKey, store) {
        super(store, selectKey);
    }
    /**
     * Generate an RxEntityMap instance with a standard (mutable) Map store.
     */
    static mutable(selectKey) {
        return new RxEntityMap(selectKey, RxMap.mutable());
    }
    /**
     * Generate an RxEntityMap instance with an immutable backend store.
     */
    static immutable(selectKey) {
        return new RxEntityMap(selectKey, RxMap.immutable());
    }
    get allChanges() {
        return this.store.allChanges;
    }
    get changes() {
        return this.store.changes;
    }
    destroy() {
        this.store.destroy();
    }
    watchOne(key) {
        return this.changes.pipe(forKey(key), pluckValue(), startWith(this.getOne(key)), filter(identity));
    }
    watchMany(keys) {
        return this.changes.pipe(forKeyIn(keys), map(() => this.getManyExisting(keys)), startWith(this.getManyExisting(keys)));
    }
    watchAll() {
        return this.changes.pipe(map(() => this.values()), startWith(this.values()));
    }
}