Resolves #501 Entities card header toggle

lib/cards/card.class.dart

@@ -10,6 +10,7 @@ class HACard {
   bool showName;
   bool showState;
   bool showEmpty;
+  bool showHeaderToggle;
   int columnsCount;
   List stateFilter;
   List states;
@@ -26,6 +27,7 @@ class HACard {
     this.linkedEntityWrapper,
     this.columnsCount: 4,
     this.showName: true,
+    this.showHeaderToggle: true,
     this.showState: true,
     this.stateFilter: const [],
     this.showEmpty: true,

lib/cards/card_widget.dart

@@ -132,7 +132,33 @@ class CardWidget extends StatelessWidget {
       return Container(height: 0.0, width: 0.0,);
     }
     List<Widget> body = [];
-    body.add(CardHeader(name: card.name));
+    Widget headerSwitch;
+    if (card.showHeaderToggle) {
+      bool headerToggleVal = entitiesToShow.any((EntityWrapper en){ return en.entity.state == EntityState.on; });
+      List<String> entitiesToToggle = entitiesToShow.where((EntityWrapper enw) {
+        return <String>["switch", "light", "automation", "input_boolean"].contains(enw.entity.domain);
+      }).map((EntityWrapper en) {
+          return en.entity.entityId;
+      }).toList();
+      headerSwitch = Switch(
+            value: headerToggleVal,
+            onChanged: (val) {
+              if (entitiesToToggle.isNotEmpty) {
+                ConnectionManager().callService(
+                  domain: "homeassistant",
+                  service: val ? "turn_on" : "turn_off",
+                  entityId: entitiesToToggle
+                );
+              }
+            },
+          );
+    }
+    body.add(
+      CardHeader(
+        name: card.name,
+        trailing: headerSwitch 
+      )
+    );
     entitiesToShow.forEach((EntityWrapper entity) {
       body.add(
           Padding(
@@ -329,7 +355,11 @@ class CardWidget extends StatelessWidget {
 
   Widget _buildUnsupportedCard(BuildContext context) {
     List<Widget> body = [];
-    body.add(CardHeader(name: card.name ?? ""));
+    body.add(
+      CardHeader(
+        name: card.name ?? ""
+      )
+    );
     List<Widget> result = [];
     if (card.linkedEntityWrapper != null) {
       result.addAll(<Widget>[

lib/home_assistant.class.dart

@@ -221,6 +221,7 @@ class HomeAssistant {
             type: rawCardInfo['type'] ?? CardType.ENTITIES,
             columnsCount: rawCardInfo['columns'] ?? 4,
             showName: (rawCardInfo['show_name'] ?? rawCard['show_name']) ?? true,
+            showHeaderToggle: (rawCardInfo['show_header_toggle'] ?? rawCard['show_header_toggle']) ?? true, 
             showState: (rawCardInfo['show_state'] ?? rawCard['show_state']) ?? true,
             showEmpty: (rawCardInfo['show_empty'] ?? rawCard['show_empty']) ?? true,
             stateFilter: (rawCard['state_filter'] ?? rawCardInfo['state_filter']) ?? [],

lib/managers/connection_manager.class.dart

@@ -352,7 +352,7 @@ class ConnectionManager {
     _currentMessageId += 1;
   }
 
-  Future callService({@required String domain, @required String service, String entityId, Map data}) {
+  Future callService({@required String domain, @required String service, entityId, Map data}) {
     eventBus.fire(NotifyServiceCallEvent(domain, service, entityId));
     Logger.d("Service call: $domain.$service, $entityId, $data");
     Completer completer = Completer();

lib/pages/main/main.page.dart

@@ -278,7 +278,7 @@ class _MainPageState extends State<MainPage> with WidgetsBindingObserver, Ticker
     );
   }
 
-  void _notifyServiceCalled(String domain, String service, String entityId) {
+  void _notifyServiceCalled(String domain, String service, entityId) {
     _showInfoBottomBar(
         message: "Calling $domain.$service",
         duration: Duration(seconds: 4)

lib/types/event_bus_events.dart

@@ -36,7 +36,7 @@ class StartAuthEvent {
 class NotifyServiceCallEvent {
   String domain;
   String service;
-  String entityId;
+  var entityId;
 
   NotifyServiceCallEvent(this.domain, this.service, this.entityId);
 }