pub-sub-topic-ts/dist/lib/pub-sub.js

PubSub Library Typescript Implementation

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.PubSub = void 0;
const uuid_1 = require("uuid");
const subscriber_1 = require("./subscriber");
const topic_1 = require("./topic");
class PubSub {
    constructor() {
        this._topics = [];
    }
    publish(topicName, data) {
        const topic = this._topics.find(t => {
            return t.name === topicName;
        });
        if (topic) {
            topic.publish(data);
        }
    }
    getTopics() {
        return this._topics.map(t => t.name);
    }
    deleteTopic(name) {
        this._topics = this._topics.filter(topic => {
            return topic.name !== name;
        });
    }
    subscribe(name, callback) {
        const topic = this._topics.find(t => {
            return t.name === name;
        });
        const subscriber = new subscriber_1.Subscriber(name, (0, uuid_1.v4)(), callback);
        if (topic) {
            topic.subscribe(subscriber);
        }
        else {
            const topic = this.createTopic(name);
            topic.subscribe(subscriber);
        }
        return subscriber;
    }
    createTopic(topic) {
        const newTopic = new topic_1.Topic(topic);
        this._topics.push(newTopic);
        return newTopic;
    }
    unsubscribe(subscriber) {
        const topic = this._topics.find(t => {
            return t.name === subscriber.topicName;
        });
        if (topic) {
            topic.unsubscribe(subscriber);
        }
    }
}
exports.PubSub = PubSub;