balena-sdk/es2017/util/pubsub.js

The Balena JavaScript SDK

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.PubSub = void 0;
class PubSub {
    constructor() {
        this.subscriptions = [];
        this.subscribe = (eventName, fn) => {
            const subscriptionInfo = {
                eventName,
                fn,
            };
            this.subscriptions.push(subscriptionInfo);
            // an unsubscribe function
            return () => {
                const indexOfFn = this.subscriptions.indexOf(subscriptionInfo);
                return this.subscriptions.splice(indexOfFn, 1);
            };
        };
        this.publish = (eventName) => {
            this.subscriptions.forEach((subscription) => {
                if (eventName === subscription.eventName) {
                    subscription.fn();
                }
            });
        };
    }
}
exports.PubSub = PubSub;