taskon/dist/message-hub.js

A simple JavaScript/TypeScript tasks queue that supports dynamic concurrency control

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.MessageHub = void 0;
class MessageHub {
    constructor() {
        this.listenerLookup = {};
    }
    subscribe(key, listener) {
        if (!this.listenerLookup[key]) {
            this.listenerLookup[key] = [];
        }
        this.listenerLookup[key].push(listener);
        return () => this.unsubscribe(key, listener);
    }
    unsubscribe(key, listener) {
        const index = this.listenerLookup[key].indexOf(listener);
        this.listenerLookup[key].splice(index, 1);
    }
    publish(key, ...params) {
        if (this.listenerLookup[key]) {
            return Promise.all(this.listenerLookup[key].map((listener) => listener(...params)));
        }
    }
}
exports.MessageHub = MessageHub;
exports.default = MessageHub;
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