Fixes hangup triggering several times

conference.js

@@ -37,6 +37,12 @@ let connectionIsInterrupted = false;
  */
 let DSExternalInstallationInProgress = false;
 
+/**
+ * Indicates whether we have started a hangup process.
+ * @type {boolean}
+ */
+let _hangupInProgress = false;
+
 import {VIDEO_CONTAINER_TYPE} from "./modules/UI/videolayout/LargeVideo";
 
 /**
@@ -232,6 +238,13 @@ function disconnectAndShowFeedback(requestFeedback) {
  * @param {boolean} [requestFeedback=false] if user feedback should be requested
  */
 function hangup (requestFeedback = false) {
+    if (_hangupInProgress) {
+        console.log("Hangup already in progress.");
+        return;
+    }
+
+    _hangupInProgress = true;
+
     const errCallback = (f, err) => {
         console.error('Error occurred during hanging up: ', err);
         return f();
@@ -242,6 +255,8 @@ function hangup (requestFeedback = false) {
     .catch(errCallback.bind(null, disconnect))
     .then(maybeRedirectToWelcomePage)
     .catch(errCallback.bind(null, maybeRedirectToWelcomePage));
+
+    _hangupInProgress = false;
 }
 
 /**

modules/UI/Feedback.js

@@ -134,6 +134,17 @@ var Feedback = {
     isEnabled: function() {
         return this.enabled && APP.conference.isCallstatsEnabled();
     },
+
+    /**
+     * Returns true if the feedback window is currently visible and false
+     * otherwise.
+     * @return {boolean} true if the feedback window is visible, false
+     * otherwise
+     */
+    isVisible: function() {
+        return $(".feedback").is(":visible");
+    },
+
     /**
      * Opens the feedback window.
      */

modules/UI/UI.js

@@ -1063,10 +1063,13 @@ UI.inviteParticipants = function (roomUrl, conferenceName, key, nick) {
  * @returns {Promise} when dialog is closed.
  */
 UI.requestFeedback = function () {
+    if (Feedback.isVisible())
+        return Promise.resolve();
+    else
         return new Promise(function (resolve, reject) {
             if (Feedback.isEnabled()) {
-            // If the user has already entered feedback, we'll show the window and
+                // If the user has already entered feedback, we'll show the
-            // immidiately start the conference dispose timeout.
+                // window and immidiately start the conference dispose timeout.
                 if (Feedback.feedbackScore > 0) {
                     Feedback.openFeedbackWindow();
                     resolve();
@@ -1075,8 +1078,8 @@ UI.requestFeedback = function () {
                     Feedback.openFeedbackWindow(resolve);
                 }
             } else {
-            // If the feedback functionality isn't enabled we show a thank you
+                // If the feedback functionality isn't enabled we show a thank
-            // dialog.
+                // you dialog.
                 messageHandler.openMessageDialog(
                     null, null, null,
                     APP.translation.translateString(