Move server-side functions from viewerbase to worklist. Split multi-frame and single-image modalities into separate display sets (OHIF-36)

Packages/viewerbase/lib/helpers/isDisplaySetActive.js

@@ -0,0 +1,28 @@
+/**
+ * Boolean helper to identify if a series instance is active in some viewport
+ */
+Template.registerHelper('isDisplaySetActive', (displaySetInstanceUid, viewportIndex) => {
+    // Run this computation every time the viewports are updated
+    Session.get('LayoutManagerUpdated');
+
+    // Stop here if layoutManager is not defined yet
+    if (!layoutManager) {
+        return;
+    }
+
+    let viewportData;
+    if (_.isUndefined(viewportIndex)) {
+        viewportData = layoutManager.viewportData;
+    } else {
+        viewportData = [layoutManager.viewportData[viewportIndex]];
+    }
+
+    let result = false;
+    _.each(viewportData, data => {
+        if (data && data.displaySetInstanceUid === displaySetInstanceUid) {
+            result = true;
+        }
+    });
+
+    return result;
+});