@tendrock/lib/dist/event/EventBus.js

A lib under the Tendrock system for Minecraft Bedrock Script API

import { EventSignal } from "./EventSignal";
import { SetMap } from "@tenolib/map";
export class EventBus {
    constructor() {
        this._eventSignalMap = new Map();
        this.callbackSetMap = new SetMap();
    }
    registerSignal(eventType) {
        const eventSignal = new EventSignal(this, eventType);
        this._eventSignalMap.set(eventType, eventSignal);
        return eventSignal;
    }
    subscribe(eventType, callback) {
        const eventSignal = this._getEventSignal(eventType);
        this.callbackSetMap.addValue(eventSignal, callback);
    }
    unsubscribe(eventType, callback) {
        const eventSignal = this._getEventSignal(eventType);
        this.callbackSetMap.deleteValue(eventSignal, callback);
    }
    _getEventSignal(eventTypeOrSignal) {
        if (typeof eventTypeOrSignal !== "string") {
            return eventTypeOrSignal;
        }
        const eventSignal = this._eventSignalMap.get(eventTypeOrSignal);
        if (!eventSignal) {
            throw new Error(`Event type ${eventTypeOrSignal} not registered`);
        }
        return eventSignal;
    }
    trigger(eventTypeOrSignal, eventData) {
        var _a;
        const eventSignal = this._getEventSignal(eventTypeOrSignal);
        if (!eventSignal)
            return;
        (_a = this.callbackSetMap.get(eventSignal)) === null || _a === void 0 ? void 0 : _a.forEach((callback) => {
            callback(eventData);
        });
    }
}
EventBus.Instance = new EventBus();
export const eventBus = EventBus.Instance;