Class NotificationManager

app/core/NotificationManager.js:85–423

* Singleton class responsible for managing all the * related notifications, which could be in-app or push * depending on the state of the app

 * depending on the state of the app
 */
class NotificationManager {
  /**
   * Navigation object from react-navigation
   */
  _navigation;
  /**
   * Array containing the id of the transaction that should be
   * displayed while interacting with a notification
   */
  _transactionToView;
  /**
   * Boolean based on the current state of the app
   */
  _backgroundMode;

  /**
   * Object containing watched transaction ids list by transaction nonce
   */
  _transactionsWatchTable = {};

  _handleAppStateChange = (appState) => {
    this._backgroundMode = appState === 'background';
  };

  _viewTransaction = (id) => {
    this._transactionToView.push(id);
    this.goTo('TransactionsHome');
  };

  _removeListeners = (transactionId) => {
    const { TransactionController } = Engine.context;
    TransactionController.hub.removeAllListeners(`${transactionId}:confirmed`);
    TransactionController.hub.removeAllListeners(`${transactionId}:finished`);
  };

  // TODO: Refactor this method to use notifee's channels in combination with MM auth
  _showNotification(data, channelId = 'default') {
    if (this._backgroundMode) {
      const { title, message } = constructTitleAndMessage(data);
      const id = data?.transaction?.id || '';
      if (id) {
        this._transactionToView.push(id);
      }

      const pushData = {
        title,
        body: message,
        android: {
          lightUpScreen: false,
          channelId,
          smallIcon: 'ic_notification_small',
          largeIcon: 'ic_notification',
          pressAction: {
            id: 'default',
            launchActivity: 'com.metamask.ui.MainActivity',
          },
        },
        ios: {