Pusher - Webhook - Maintain State of Online Channels inside a global variable

pusher.js

// Pusher Logic inside a Web Hook post api to make a list of connections with channels

// online users stored in a global variable
var onlineUsers = [
  { channel: "23", name: "channel_occupied" },
  { channel: "9421321", name: "channel_occupied" },
  { channel: "941", name: "channel_occupied" }
];

// Pusher web hook fires off the event via webhook
// A connection closes -- user goes offline
var event = { channel: "9421321", name: "channel_vacated" };

// new connection -- user comes online
//var event = { channel: "3123", name: "channel_occupied" };

// Our logic to maintain online users variable in api called by webhook
if (event["name"] == "channel_occupied") {
  onlineUsers.push(event);
} else if (event["name"] == "channel_vacated") {
  onlineUsers = onlineUsers.filter(
    item => item["channel"] !== event["channel"]
  );
}

console.log(onlineUsers);

Actual Web Hook Post API