chrome/browser/resources/app_management/api_listener.js

// Copyright 2018 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
cr.define('app_management.apiListener', function() {
  let initialized = false;

  async function init() {
    assert(!initialized);

    const {apps: initialApps} =
        await app_management.BrowserProxy.getInstance().handler.getApps();
    const initialState = app_management.util.createInitialState(initialApps);
    app_management.Store.getInstance().init(initialState);

    const callbackRouter =
        app_management.BrowserProxy.getInstance().callbackRouter;

    callbackRouter.onAppAdded.addListener(onAppAdded);
    callbackRouter.onAppChanged.addListener(onAppChanged);
    callbackRouter.onAppRemoved.addListener(onAppRemoved);

    initialized = true;
  }

  /**
   * @param {cr.ui.Action} action
   */
  function dispatch(action) {
    app_management.Store.getInstance().dispatch(action);
  }

  /**
   * @param {App} app
   */
  function onAppAdded(app) {
    dispatch(app_management.actions.addApp(app));
  }

  /**
   * @param {App} app
   */
  function onAppChanged(app) {
    dispatch(app_management.actions.changeApp(app));
  }

  /**
   * @param {string} appId
   */
  function onAppRemoved(appId) {
    dispatch(app_management.actions.removeApp(appId));
  }

  init();

  return {};
});