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let onError = function(error) {
  console.log(error.code, error.msg);
};
tuiCallEngine.on(TUICallEvent.ERROR, onError);

let onSDKReady = function(event) {
  console.log(event);
};
tuiCallEngine.on(TUICallEvent.SDK_READY, onSDKReady);

let handleOnKickedOut = function(event) {
  console.log(event);
};
tuiCallEngine.on(TUICallEvent.KICKED_OUT, handleOnKickedOut);

let handleUserAccept = function(event) {
  console.log(event.userID);
};
tuiCallEngine.on(TUICallEvent.USER_ACCEPT, handleUserAccept);

let handleUserEnter = function(event) {
  console.log(event.userID);
};
tuiCallEngine.on(TUICallEvent.USER_ENTER, handleUserEnter);

let handleUserLeave = function(event) {
  console.log(event.userID);
};
tuiCallEngine.on(TUICallEvent.USER_LEAVE, handleUserLeave);

let handleInviteeReject = function(event) {
  console.log(event.userID);
};
tuiCallEngine.on(TUICallEvent.REJECT, handleInviteeReject);

let handleLineBusy = function(event) {
  console.log(event);
};
tuiCallEngine.on(TUICallEvent.LINE_BUSY, handleLineBusy);

let handleUserVideoChange = function(event) {
  console.log(event.userID, event.isVideoAvailable);
};
tuiCallEngine.on(TUICallEvent.USER_VIDEO_AVAILABLE, handleUserVideoChange);

let handleUserAudioChange = function(event) {
  console.log(event.userID, event.isAudioAvailable);
};
tuiCallEngine.on(TUICallEvent.USER_AUDIO_AVAILABLE, handleUserAudioChange);

let handleUserVoiceVolumeChange = function(event) {
  console.log(event.volumeMap);
};
tuiCallEngine.on(TUICallEvent.USER_VOICE_VOLUME, handleUserVoiceVolumeChange);

let handleGroupInviteeListUpdate = function(event) {
  console.log(event.userIDList);
};
tuiCallEngine.on(TUICallEvent.GROUP_CALL_INVITEE_LIST_UPDATE, handleGroupInviteeListUpdate);

let handleOnCallReceived = function(event) {
    console.log(event);
};
tuiCallEngine.on(TUICallEvent.ON_CALL_RECEIVED, handleOnCallReceived);

let handleOnCallCanceled = function(event) {
  console.log(event.userID);
};
tuiCallEngine.on(TUICallEvent.ON_CALL_CANCELED, handleOnCallCanceled);

let handleOnCallBegin = function(event) {
    console.log(event);
};
tuiCallEngine.on(TUICallEvent.ON_CALL_BEGIN, handleOnCallBegin);

let handleCallingEnd = function(event) {
  console.log(event.userID, event.);
};
tuiCallEngine.on(TUICallEvent.CALLING_END, handleCallingEnd);