iagate-querykit/dist/event-manager.js

QueryKit: lightweight TypeScript query toolkit with models, views, triggers, events, scheduler and adapters (better-sqlite3).

import { QueryKitConfig } from './config';
export class EventManager {
    listeners = {};
    on(eventName, listener) {
        if (!this.listeners[eventName]) {
            this.listeners[eventName] = [];
        }
        this.listeners[eventName].push(listener);
        return () => this.off(eventName, listener);
    }
    off(eventName, listener) {
        if (!this.listeners[eventName])
            return;
        this.listeners[eventName] = this.listeners[eventName].filter(l => l !== listener);
    }
    emit(eventName, ...args) {
        if (this.listeners[eventName]) {
            this.listeners[eventName].forEach(listener => {
                try {
                    listener(...args);
                }
                catch (error) {
                    console.error(`Error in event listener for '${eventName}':`, error);
                }
            });
        }
        if (QueryKitConfig.eventBus) {
            try {
                QueryKitConfig.eventBus.emit(eventName, ...args);
            }
            catch { }
        }
    }
}
export const eventManager = new EventManager();