lik/dist/lik.observablemap.js

"use strict";
const plugins = require("./lik.plugins");
const lik_objectmap_1 = require("./lik.objectmap");
/**
 * manages observables by making sure that only one observable is regsitered per event
 */
class Observablemap {
    constructor() {
        this.ObservableEmitterBundleObjectmap = new lik_objectmap_1.Objectmap();
    }
    /**
     * creates a new observable if not yet registered for the same event.
     * In case event has been registered before the same observable is returned.
     */
    getObservableForEmitterEvent(emitterArg, eventArg) {
        let existingBundle = this.ObservableEmitterBundleObjectmap.find((bundleArg) => {
            return (bundleArg.emitter === emitterArg && bundleArg.event === eventArg);
        });
        if (existingBundle) {
            return existingBundle.observable;
        }
        else {
            let emitterObservable = plugins.rx.Observable.fromEvent(emitterArg, eventArg);
            this.ObservableEmitterBundleObjectmap.add({
                observable: emitterObservable,
                emitter: emitterArg,
                event: eventArg
            });
            return emitterObservable;
        }
    }
}
exports.Observablemap = Observablemap;
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