Resolves #151 Group visibility support

lib/card_class.dart

@@ -1,11 +1,11 @@
 part of 'main.dart';
 
-class HACard extends StatelessWidget {
+class CardWidget extends StatelessWidget {
 
   final List<Entity> entities;
   final String friendlyName;
 
-  const HACard({
+  const CardWidget({
     Key key,
     this.entities,
     this.friendlyName
@@ -13,6 +13,13 @@ class HACard extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
+    final entityModel = EntityModel.of(context);
+    if (entityModel != null) {
+      final groupEntity = entityModel.entity;
+      if (groupEntity.isHidden) {
+        return Container(width: 0.0, height: 0.0,);
+      }
+    }
     List<Widget> body = [];
     body.add(_buildCardHeader());
     body.addAll(_buildCardBody(context));

lib/entity_class/entity.class.dart

@@ -62,6 +62,7 @@ class Entity {
   String get unitOfMeasurement => attributes["unit_of_measurement"] ?? "";
   List get childEntityIds => attributes["entity_id"] ?? [];
   String get lastUpdated => _getLastUpdatedFormatted();
+  bool get isHidden => attributes["hidden"] ?? false;
 
   Entity(Map rawData) {
     update(rawData);

lib/view_class.dart

@@ -41,6 +41,7 @@ class View {
       } else {
         childEntitiesAsCards[entity.entityId] = CardSkeleton(
           displayName: entity.displayName,
+          groupEntity: entity
         );
         childEntitiesAsCards[entity.entityId].childEntities = entity.childEntities;
       }
@@ -111,10 +112,14 @@ class ViewWidgetState extends State<ViewWidget> {
 
     widget.cards.forEach((String id, CardSkeleton skeleton){
       result.add(
-          HACard(
+        EntityModel(
+            entity: skeleton.groupEntity,
+            handleTap: false,
+            child: CardWidget(
               entities: skeleton.childEntities,
               friendlyName: skeleton.displayName,
             )
+        )
       );
     });
 
@@ -151,8 +156,13 @@ class ViewWidgetState extends State<ViewWidget> {
 class CardSkeleton {
   String displayName;
   List<Entity> childEntities;
+  Entity groupEntity;
 
-  CardSkeleton({Key key, this.displayName, this.childEntities}) {
+  CardSkeleton({
+    Key key,
+    this.displayName,
+    this.childEntities,
+    this.groupEntity}) {
     childEntities = [];
   }
 }