journaly/dist/source/journaly/publisherSubscriber.js

A simple pub-sub library project

"use strict";
var __importDefault = (this && this.__importDefault) || function (mod) {
    return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.PublisherSubscriber = void 0;
const invalidTopic_1 = __importDefault(require("./invalidTopic"));
const subject_1 = require("./subject");
class PublisherSubscriber extends subject_1.Subject {
    constructor() {
        super();
        this.subscribers = {};
    }
    subscribe(subscriber, topic) {
        this.checkTopic(topic);
        if (this.checkSubscriber(subscriber, topic) !== -1)
            return new Promise((_resolve, reject) => {
                reject(new invalidTopic_1.default(topic));
            });
        this.subscribers[topic].push(subscriber);
        return new Promise((resolve) => {
            resolve([]);
        });
    }
    unsubscribe(subscriber, topic) {
        this.checkTopic(topic);
        const index = this.checkSubscriber(subscriber, topic);
        if (index === -1) {
            return false;
        }
        this.subscribers[topic].splice(index, 1);
        return true;
    }
    // eslint-disable-next-line @typescript-eslint/no-explicit-any
    async publish(topic, ...params) {
        this.checkTopic(topic);
        return Promise.all(this.subscribers[topic].map((subscriber) => {
            return subscriber(...params);
        }));
    }
    checkSubscriber(subscriber, topic) {
        const index = this.subscribers[topic].indexOf(subscriber);
        return index;
    }
}
exports.PublisherSubscriber = PublisherSubscriber;
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