@akala/core/dist/esm/events/event-bus.js

import { AsyncTeardownManager } from "../teardown-manager.js";
/**
 * Wrapper class for EventEmitter to manage subscriptions.
 * @template T
 * @implements {Disposable}
 */
export class EventBusWrapper extends AsyncTeardownManager {
    emitter;
    constructor(emitter) {
        super();
        this.emitter = emitter;
        emitter.once(Symbol.dispose, (() => this[Symbol.dispose]()));
    }
    subscriptions = [];
    /**
     * Checks if there are listeners for a given event.
     * @template TKey
     * @param {TKey} name - The name of the event.
     * @returns {boolean} - True if there are listeners, false otherwise.
     */
    hasListener(name) {
        return this.emitter.hasListener(name);
    }
    /**
     * Gets the defined events.
     * @returns {string[]} - An array of defined event names.
     */
    get definedEvents() {
        return this.emitter.definedEvents;
    }
    /**
     * Emits an event.
     * @template TEvent
     * @param {TEvent} event - The event to emit.
     * @param {...EventArgs<T[TEvent]>} args - The arguments to pass to the event listeners.
     * @returns {false | EventReturnType<T[TEvent]>} - The return value of the event listeners or false if the event does not exist.
     */
    emit(event, ...args) {
        return this.emitter.emit(event, ...args);
    }
    /**
     * Adds a listener for an event.
     * @template TEvent
     * @param {TEvent} event - The event to listen to.
     * @param {EventListener<AllEvents<T>[TEvent]>} handler - The event handler.
     * @param {EventOptions<AllEvents<T>[TEvent]>} [options] - The event options.
     * @returns {Subscription} - The subscription.
     */
    on(event, handler, options) {
        const sub = this.emitter.on(event, handler, options);
        this.subscriptions.push(sub);
        return sub;
    }
    /**
     * Adds a one-time listener for an event.
     * @template TEvent
     * @param {TEvent} event - The event to listen to.
     * @param {EventListener<AllEvents<T>[TEvent]>} handler - The event handler.
     * @param {Omit<EventOptions<AllEvents<T>[TEvent]>, "once">} [options] - The event options.
     * @returns {Subscription} - The subscription.
     */
    once(event, handler, options) {
        const sub = this.emitter.once(event, handler, options);
        this.subscriptions.push(sub);
        return sub;
    }
    /**
     * Removes a listener for an event.
     * @template TEvent
     * @param {TEvent} event - The event to remove the listener from.
     * @param {EventListener<AllEvents<T>[TEvent]>} handler - The event handler.
     * @returns {boolean} - True if the listener was removed, false otherwise.
     */
    off(event, handler) {
        return this.emitter.off(event, handler);
    }
}
/**
 * Wrapper class to make a sync event bus async.
 * @template T
 * @implements {Disposable}
 */
export class EventBus2AsyncEventBus extends AsyncTeardownManager {
    emitter;
    constructor(emitter) {
        super();
        this.emitter = emitter;
        emitter.once(Symbol.dispose, (() => this[Symbol.asyncDispose]()));
    }
    subscriptions = [];
    /**
     * Checks if there are listeners for a given event.
     * @template TKey
     * @param {TKey} name - The name of the event.
     * @returns {boolean} - True if there are listeners, false otherwise.
     */
    hasListener(name) {
        return Promise.resolve(this.emitter.hasListener(name));
    }
    /**
     * Gets the defined events.
     * @returns {string[]} - An array of defined event names.
     */
    get definedEvents() {
        return Promise.resolve(this.emitter.definedEvents);
    }
    /**
     * Emits an event.
     * @template TEvent
     * @param {TEvent} event - The event to emit.
     * @param {...EventArgs<T[TEvent]>} args - The arguments to pass to the event listeners.
     * @returns {false | EventReturnType<T[TEvent]>} - The return value of the event listeners or false if the event does not exist.
     */
    emit(event, ...args) {
        return Promise.resolve(this.emitter.emit(event, ...args));
    }
    /**
     * Adds a listener for an event.
     * @template TEvent
     * @param {TEvent} event - The event to listen to.
     * @param {EventListener<AllEvents<T>[TEvent]>} handler - The event handler.
     * @param {EventOptions<AllEvents<T>[TEvent]>} [options] - The event options.
     * @returns {Subscription} - The subscription.
     */
    on(event, handler, options) {
        const sub = this.emitter.on(event, handler, options);
        this.subscriptions.push(sub);
        return Promise.resolve(() => Promise.resolve(sub()));
    }
    /**
     * Adds a one-time listener for an event.
     * @template TEvent
     * @param {TEvent} event - The event to listen to.
     * @param {EventListener<AllEvents<T>[TEvent]>} handler - The event handler.
     * @param {Omit<EventOptions<AllEvents<T>[TEvent]>, "once">} [options] - The event options.
     * @returns {Subscription} - The subscription.
     */
    once(event, handler, options) {
        const sub = this.emitter.once(event, handler, options);
        this.subscriptions.push(sub);
        return Promise.resolve(() => Promise.resolve(sub()));
    }
    /**
     * Removes a listener for an event.
     * @template TEvent
     * @param {TEvent} event - The event to remove the listener from.
     * @param {EventListener<AllEvents<T>[TEvent]>} handler - The event handler.
     * @returns {boolean} - True if the listener was removed, false otherwise.
     */
    off(event, handler) {
        return Promise.resolve(this.emitter.off(event, handler));
    }
}
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