journaly/dist/source/journaly/subjectObserver.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.SubjectObserver = void 0;
const invalidSubscriber_1 = __importDefault(require("./invalidSubscriber"));
const subject_1 = require("./subject");
class SubjectObserver extends subject_1.Subject {
    constructor() {
        super();
        this.subscribers = [];
    }
    getTopics() {
        return [];
    }
    subscribe(subscriber) {
        if (this.checkSubscriber(subscriber) !== -1)
            return new Promise((_resolve, reject) => {
                reject(new invalidSubscriber_1.default());
            });
        this.subscribers.push(subscriber);
        return new Promise((resolve) => {
            resolve([]);
        });
    }
    unsubscribe(subscriber) {
        const index = this.checkSubscriber(subscriber);
        if (index === -1) {
            return false;
        }
        this.subscribers.splice(index, 1);
        return true;
    }
    // eslint-disable-next-line @typescript-eslint/no-explicit-any
    async publish(...params) {
        return Promise.all(this.subscribers.map((subscriber) => {
            return subscriber(...params);
        }));
    }
    // eslint-disable-next-line @typescript-eslint/no-empty-function
    checkSubscriber(subscriber) {
        const index = this.subscribers.indexOf(subscriber);
        return index;
    }
}
exports.SubjectObserver = SubjectObserver;
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