Push Notifications to the Right People and Devices

This article shows how you can write RHMAP Cloud Apps to perform push notifications to:

• All devices subscribed to a ‘category’, enabling the possibility of users choosing the notification categories they find interesting.
• A specific group of users, providing efficient communication with a defined set of users.

With RHMAP, it is simple to deliver a notification to a set of users/devices based on category. For example, if your app reports sports results, you can filter the results to only send notifications relating to your favorite sports categories as follows:

const message = {
  alert: "Hello from Cloud App to sports fans!",
  sound: "default"
};

const options = {
  criteria: {}
};

options.criteria = {
  categories: [“Curling”,”Hockey”]
};

$fh.push(message, options, () => {
  console.log("All Curling and Hockey fans notified!");
});

If you want to deliver a notification to a list of specific recipient aliases, use the following code to send the notification to a group of up to ten recipients at a time:

const listOfAlias = ["ceo@company.com", "cto@company.com", "cfo@company.com", "cio@company.com"];
const message = {
  alert: "Hello from Cloud App to the famous four",
  sound: "default"
};

const options = {
  criteria: {}
};

options.criteria = {
  alias: listOfAliases
};

$fh.push(message, options, () => {
  console.log("All aliases notified!");
});

Note: When registering with the server, Client Apps report an alias, such as a user name or an e-mail representing a single person (with possibly multiple devices).