janky/src/Janky/services/SubscribeEventHandler.ts

Janus Interface

import { JanusJS } from "janus-gateway";
import LocalRTC from "../repositories/LocalRTC";

interface SubscriberEventsHandlerOptions {
    msg: JanusJS.Message;
    jsep: JanusJS.JSEP;
    handleRemoteSDP: () => void;
}

class SubscriberEventsHandler {

    private event: string = '';
    private readonly msg: JanusJS.Message;
    private readonly jsep: JanusJS.JSEP;
    private readonly handleRemoteSDP: () => void;

    constructor({
        msg,
        jsep,
        handleRemoteSDP,
    }: SubscriberEventsHandlerOptions){
        
        this.msg = msg;
        this.jsep = jsep;
        this.handleRemoteSDP = handleRemoteSDP;

        this.event = msg.videoroom;
        this.handleMessageEventHanlder();
        this.messageErrorHandler();
        this.handleMessageJsep();
    }

    private async handleMessageEventHanlder() {
        if(!this.event || this.event === '') return;
        switch(this.event) {
            case 'attached': 
                //handle a user joined
                const { id, private_id: privateID } = this.msg; // To do something with publishers
                LocalRTC.setIDs(id, privateID);
            break;
            // case 'destroyed':
            //     console.log('Room is destroyed', this.msg);
            //     //handle a room destroyed
            // break;
            // case 'talking':
            //     console.log('someone is talking', this.msg);
            //     //handle a user talking
            // break;
            // case 'stopped-talking':
            //     console.log('Someone stopped talking', this.msg);
            //     //handle a user stopped talking
            // break;
            case 'event':
                if(this.msg.substream) {
                    console.log('got sub streams');
                }
                if(this.msg.publishers) {
                    // handle new feeds
                    console.log('Yaaay new feeds', this.msg);
                }
                if(this.msg.leaving) {
                    // handle a user is leaving
                    console.log('Owww, is leaving :(', this.msg);
                }
                if(this.msg.unpublished) {
                    console.log('someone has just shutup', this.msg);
                    // handle a user stopped publishing
                }
            break;

        }
    }

    private messageErrorHandler() {
        if(!this.msg.error) return;
        console.error('ERRROR!', this.msg);
        if(this.msg.error_code === 429) {
            // Handle no room for this session
            console.log('Oh no, joining to an alien room', this.msg);
            return;
        }
        // Normal error handling
        console.error('Dammit!', this.msg);
    }

    private handleMessageJsep () {
        if(!this.jsep) return;
        this.handleRemoteSDP();
    }

};

export default SubscriberEventsHandler;