@crossed/sheet/src/eventmanager.ts

A Cross Platform(Android & iOS) ActionSheet with a robust and flexible api, native performance and zero dependency code for react native. Create anything you want inside ActionSheet.

/**
 * Copyright (c) Paymium.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root of this projects source tree.
 */

export type EventHandler = (..._args: any[]) => void;
export type EventHandlerSubscription = {
  unsubscribe: () => void;
};

class EventManager {
  _registry: Map<
    EventHandler,
    {
      name: string;
      once: boolean;
    }
  >;
  constructor() {
    this._registry = new Map();
  }

  unsubscribeAll() {
    this._registry.clear();
  }

  subscribe(name: string, handler: EventHandler, once = false) {
    if (!name || !handler) throw new Error('name and handler are required.');
    this._registry.set(handler, { name, once });
    return { unsubscribe: () => this.unsubscribe(name, handler) };
  }

  unsubscribe(_name: string, handler: EventHandler) {
    return this._registry.delete(handler);
  }

  publish(name: string, ...args: any[]) {
    this._registry.forEach((props, handler) => {
      if (props.name === name) handler(...args);
      if (props.once) this._registry.delete(handler);
    });
  }

  remove(...names: string[]) {
    this._registry.forEach((props, handler) => {
      if (names.includes(props.name)) this._registry.delete(handler);
    });
  }
}
export default EventManager;

export const actionSheetEventManager = new EventManager();