podchat-browser/src/lib/call/multitrack/midManager.js

Javascript SDK to use POD's Chat Service - Browser Only

class MidManager {
    constructor(props) {
        this._app = props.app;
        this._mids = {};
    }

    pushMidToList(topic, mids) {
        this._mids[topic] = mids;
    }

    removeTopic(topic){
        if(this._mids[topic]) {
            delete this._mids[topic]
        }
    }

    getTopicsOfMids(midList) {
        let topics = [];
        for(let topic in this._mids) {
            for(let mid of midList) {
                if(this._mids[topic].includes(mid)) {
                    topics.push(topic);
                }
            }
        }

        return topics;
    }

    /**
     * We must close existing topic streams and open a new stream with the new mid
     */
    async reOpenExistingDuplicateMids(list) {
        /**
         * If mid of a new track in the list, already exists, we should open that topic again
         */
        let topics = this.getTopicsOfMids(list.flatMap(item => item.mids));
        let call = this._app.call.currentCall();
        for(let topic of topics) {
            let userId = call.users().findUserIdByTopic(topic);
            let userObj = call.users().get(userId);
            if(topic.startsWith('Vi') || topic.startsWith('screen')) {
                await userObj.destroyVideo();
                // let obj = list.find(it => it.topic == topic);
                // await userObj.startVideo(topic.replace("Vi-", ""), {...obj, version: userObj.getReceiveVideoVersion()});
            } else {
                await userObj.destroyAudio();
                // let obj = list.find(it => it.topic == topic);
                // await userObj.startAudio(topic.replace("Vi-", ""), {...obj, version: userObj.getReceiveAudioVersion()});
            }

            delete this._mids[topic];
        }

        for(let i in list) {
            this.pushMidToList(list[i].topic, list[i].mids);
        }

        call.requestReceivingMedia();
    }
}

export default MidManager;