@synet/patterns/dist/patterns/observer.js

Robust, battle-tested collection of stable patterns used in Synet packages

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.Subject = void 0;
/**
 * Subject that maintains a list of observers and notifies them of changes
 */
class Subject {
    constructor() {
        this.observers = [];
    }
    /**
     * Add an observer to be notified of changes
     */
    subscribe(observer) {
        if (!this.observers.includes(observer)) {
            this.observers.push(observer);
        }
    }
    /**
     * Remove an observer from the notification list
     */
    unsubscribe(observer) {
        const index = this.observers.indexOf(observer);
        if (index !== -1) {
            this.observers.splice(index, 1);
        }
    }
    /**
     * Notify all observers of a change
     */
    notify(data) {
        for (const observer of this.observers) {
            observer.update(data);
        }
    }
}
exports.Subject = Subject;