src.app.shared.event-manager.service.ts Maven / Gradle / Ivy

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/*
 * SPDX-FileCopyrightText: 2017-2024 Enedis
 *
 * SPDX-License-Identifier: Apache-2.0
 *
 */

import { Observable, Observer, Subscription } from 'rxjs';
import { Injectable } from '@angular/core';
import { filter, share } from 'rxjs/operators';

@Injectable({
    providedIn: 'root'
})
export class EventManagerService {

    observable: Observable;
    observer: Observer;

    constructor() {
        this.observable = Observable.create((observer: Observer) => {
            this.observer = observer;
        }).pipe(share());
    }

    /**
     * Method to broadcast the event to observer
     */
    broadcast(event) {
        if (this.observer != null) {
            this.observer.next(event);
        }
    }

    /**
     * Method to subscribe to an event with callback
     */
    subscribe(eventName, callback) {
        return this.observable.pipe(filter((event) => {
            return event.name === eventName;
        })).subscribe(callback);
    }

    /**
     * Method to unsubscribe the subscription
     */
    destroy(subscriber: Subscription) {
        subscriber && subscriber.unsubscribe();
    }
}