notification-subscription.js

_showNotification(client, newState, oldState) {
    if(!client.subscribed || newState != SENSOR_STATE_FREE)
      return false;
      
    this._clearAllAlertsSubscriptions();
    let message = {    
      title: `Restroom available`,
      body: `Restroom just become available at floor ${client.floor.replace('floor-', '')} in ${client.area} wing`,
      media: '/media/favicon-160x160.png',
      timeout: 30000 
    };

    return this._sendBrowserNotification(message)
      .then((wasClicked) => {
        this._logger.info(`Notification was sent via NotificationAPI and return result was ${wasClicked}`);
        // TODO: do something on click?
      })
      .catch((reason) => {
        this._logger.error(`Failed to use NotificationAPI due to ${reason}`);
        setTimeout(() => alert(message.title + '\n' + message.body), 0);
      });
  }

  _sendBrowserNotification(message) {
    return new Promise((resolve, reject) => {
    
      if(!browserNotifications.isSupported())
        reject('Browser doesn\'t support NotificationAPI');
        
      browserNotifications.requestPermissions()
        .then((isPermitted) => {
          if(!isPermitted)
            reject('User didn\'t give permissions');
            
          browserNotifications
            .send(message.title, message.body, message.media, message.timeout)
            .then((wasClicked) => resolve(wasClicked))
            .catch((error) => reject(error));         
        })
        .catch((error) => reject(error));
    });
  }