use JitsiParticipant; add some method implementations

JitsiParticipant.js

     this._conference = conference;
     this._displayName = displayName;
     this._supportsDTMF = false;
+    this._tracks = [];
+    this._isModerator = false;
 }
 
 /**
  * @returns {Array.<JitsiTrack>} The list of media tracks for this participant.
  */
 JitsiParticipant.prototype.getTracks = function() {
-
+    return this._tracks;
 };
 
 /**
  * @returns {Boolean} Whether this participant is a moderator or not.
  */
 JitsiParticipant.prototype.isModerator = function() {
+    return this._isModerator;
 };
 
 // Gets a link to an etherpad instance advertised by the participant?
  * @returns {Boolean} Whether this participant has muted their audio.
  */
 JitsiParticipant.prototype.isAudioMuted = function() {
-
+    return this.getTracks().reduce(function (track, isAudioMuted) {
+        return isAudioMuted && (track.isVideoTrack() || track.isMuted());
+    }, true);
 };
 
 /*
  * @returns {Boolean} Whether this participant has muted their video.
  */
 JitsiParticipant.prototype.isVideoMuted = function() {
-
+    return this.getTracks().reduce(function (track, isVideoMuted) {
+        return isVideoMuted && (track.isAudioTrack() || track.isMuted());
+    }, true);
 };
 
 /*
 
 };
 
-/**
- * @returns {String} The ID for this participant's avatar.
- */
-JitsiParticipant.prototype.getAvatarId = function() {
-
-};
-
 /**
  * @returns {Boolean} Whether this participant is currently sharing their screen.
  */

doc/example/example.js

 function onRemoteTrack(track) {
     if(track.isLocal())
         return;
-    var participant = track.getParitcipantId();
+    var participant = track.getParticipantId();
     if(!remoteTracks[participant])
         remoteTracks[participant] = [];
     var idx = remoteTracks[participant].push(track);

modules/RTC/JitsiRemoteTrack.js

  * Returns the participant id which owns the track.
  * @returns {string} the id of the participants.
  */
-JitsiRemoteTrack.prototype.getParitcipantId = function() {
+JitsiRemoteTrack.prototype.getParticipantId = function() {
     return Strophe.getResourceFromJid(this.peerjid);
 };
 

modules/xmpp/SDPUtil.js

-
 var logger = require("jitsi-meet-logger").getLogger(__filename);
 var RTCBrowserType = require("../RTC/RTCBrowserType");
 
         return line + '\r\n';
     }
 };
+
 module.exports = SDPUtil;