LT-249: Implementing behavior for 'comparison' and 'key timepoints' switch

Packages/viewerbase/lib/helpers/blaze.js

@@ -0,0 +1,33 @@
+// Return the current template instance
+Template.registerHelper('instance', () => {
+    return Template.instance();
+});
+
+// Create a new object and extends it with the argument objects
+Template.registerHelper('extend', (...argsArray) => {
+    // Create the resulting object
+    const result = {};
+
+    // Extract the Spacebars kw hash
+    const kwHash = _.last(argsArray).hash;
+
+    // Extract the given objects
+    const objects = _.initial(argsArray);
+
+    // Iterate over the given objects
+    _.each(objects, current => {
+        // Stop here if the current argument is not an object
+        if (typeof current !== 'object') {
+            return;
+        }
+
+        // Extend the resulting object with the current argument object
+        _.extend(result, current);
+    });
+
+    // Extend the resulting object with the Spacebars kw hash
+    _.extend(result, kwHash);
+
+    // Return the resulting object
+    return result;
+});

Packages/viewerbase/package.js

@@ -175,6 +175,7 @@ Package.onUse(function(api) {
     // UI Helpers
     api.addFiles([
         'lib/helpers/formatDA.js',
+        'lib/helpers/blaze.js',
         'lib/helpers/logical.js',
         'lib/helpers/formatJSDate.js',
         'lib/helpers/jsDateFromNow.js',