Replacing switchToTab with routes

OHIFViewer/client/components/ohifViewer/ohifViewer.js

@@ -5,13 +5,6 @@ import { OHIF } from 'meteor/ohif:core';
 const studylistContentId = 'studylistTab';
 let lastContentId;
 
-// Define the ViewerData global object
-// If there is currently any Session data for this object,
-// use this to repopulate the variable
-Template.ohifViewer.onCreated(() => {
-    ViewerData = Session.get('ViewerData') || {};
-});
-
 Template.ohifViewer.events({
     'click .js-toggle-studyList'() {
         const contentId = Session.get('activeContentId');
@@ -31,11 +24,10 @@ Template.ohifViewer.events({
 Template.ohifViewer.helpers({
     studyListToggleText() {
         const contentId = Session.get('activeContentId');
-        Session.get('ViewerData');
 
         // If the Viewer has not been opened yet, 'Back to viewer' should
         // not be displayed
-        const viewerContentExists = !!Object.keys(ViewerData).length;
+        const viewerContentExists = !!Object.keys(OHIF.viewer.data).length;
         if (!viewerContentExists) {
             return;
         }