partey_workadventure/front/src/Api/iframe/chat.ts

import type { ChatEvent } from '../Events/ChatEvent'
import { isUserInputChatEvent, UserInputChatEvent } from '../Events/UserInputChatEvent'
import { IframeApiContribution, sendToWorkadventure } from './IframeApiContribution'
import { apiCallback } from "./registeredCallbacks";
import {Subject} from "rxjs";

const chatStream = new Subject<string>();

class WorkadventureChatCommands extends IframeApiContribution<WorkadventureChatCommands> {

    callbacks = [apiCallback({
        callback: (event: UserInputChatEvent) => {
            chatStream.next(event.message);
        },
        type: "userInputChat",
        typeChecker: isUserInputChatEvent
    })]


    sendChatMessage(message: string, author: string) {
        sendToWorkadventure({
            type: 'chat',
            data: {
                'message': message,
                'author': author
            } as ChatEvent
        })
    }

    /**
     * Listen to messages sent by the local user, in the chat.
     */
    onChatMessage(callback: (message: string) => void) {
        chatStream.subscribe(callback);
    }
}

export default new WorkadventureChatCommands()