@epicgames-ps/lib-pixelstreamingfrontend-ue5.4/src/UeInstanceMessage/ResponseController.ts

Frontend library for Unreal Engine 5.4 Pixel Streaming

// Copyright Epic Games, Inc. All Rights Reserved.

import { Logger } from '../Logger/Logger';

export class ResponseController {
    responseEventListeners: Map<string, (response: string) => void> = new Map();

    /**
     * Add a response event listener to the response map
     * @param name - The name of the response
     * @param listener - The method to be activated when the response is selected
     */
    addResponseEventListener(
        name: string,
        listener: (response: string) => void
    ) {
        this.responseEventListeners.set(name, listener);
    }

    /**
     * Remove a response event listener to the response map
     * @param name - The name of the response
     */
    removeResponseEventListener(name: string) {
        this.responseEventListeners.delete(name);
    }

    /**
     * Handle a response when receiving one form the streamer
     * @param message - Data received from the data channel with the command in question
     */
    onResponse(message: ArrayBuffer) {
        Logger.Log(
            Logger.GetStackTrace(),
            'DataChannelReceiveMessageType.Response',
            6
        );
        const responses = new TextDecoder('utf-16').decode(message.slice(1));

        Logger.Log(Logger.GetStackTrace(), responses, 6);
        this.responseEventListeners.forEach(
            (listener: (response: string) => void) => {
                listener(responses);
            }
        );
    }
}