Support cloning

lib/ui/client/view/client_view_vm.dart

@@ -99,7 +99,7 @@ class ClientViewVM {
             store.dispatch(UpdateCurrentRoute(ClientScreen.route)),
         onActionSelected: (BuildContext context, EntityAction action) {
           final Completer<Null> completer = Completer<Null>();
-          var message = '';
+          String message;
           switch (action) {
             case EntityAction.archive:
               store.dispatch(ArchiveClientRequest(completer, client.id));
@@ -114,10 +114,10 @@ class ClientViewVM {
               message = AppLocalization.of(context).successfullyRestoredClient;
               break;
           }
-          return completer.future.then((_) {
+          completer.future.then((_) {
             if ([EntityAction.archive, EntityAction.delete].contains(action)) {
               Navigator.of(context).pop(message);
-            } else {
+            } else if (message != null){
               Scaffold.of(context).showSnackBar(SnackBar(
                   content: SnackBarRow(
                     message: message,

lib/ui/invoice/view/invoice_view.dart

@@ -273,6 +273,11 @@ class _CustomAppBar extends StatelessWidget implements PreferredSizeWidget {
               ),
               ActionMenuButton(
                 customActions: [
+                  ActionMenuChoice(
+                    label: localization.clone,
+                    icon: Icons.control_point_duplicate,
+                    action: EntityAction.clone,
+                  ),
                   !invoice.isPublic
                       ? ActionMenuChoice(
                           action: EntityAction.markSent,

lib/ui/invoice/view/invoice_view_vm.dart

@@ -17,6 +17,7 @@ import 'package:url_launcher/url_launcher.dart';
 
 class InvoiceViewScreen extends StatelessWidget {
   static const String route = '/invoice/view';
+
   const InvoiceViewScreen({Key key}) : super(key: key);
 
   @override
@@ -69,7 +70,7 @@ class InvoiceViewVM {
       store.dispatch(LoadInvoice(completer: completer, invoiceId: invoice.id));
       return completer.future.then((_) {
         Scaffold.of(context).showSnackBar(SnackBar(
-            content: SnackBarRow(
+                content: SnackBarRow(
               message: AppLocalization.of(context).refreshComplete,
             )));
       });
@@ -152,26 +153,27 @@ class InvoiceViewVM {
               store.dispatch(RestoreInvoiceRequest(completer, invoice.id));
               message = AppLocalization.of(context).successfullyRestoredInvoice;
               break;
+            case EntityAction.clone:
+              store.dispatch(
+                  EditInvoice(context: context, invoice: invoice.clone));
+              break;
           }
-          if (message != null) {
-            return completer.future.then((_) {
-              if ([EntityAction.archive, EntityAction.delete]
-                  .contains(action)) {
-                Navigator.of(context).pop(message);
-              } else {
-                Scaffold.of(context).showSnackBar(SnackBar(
-                        content: SnackBarRow(
-                      message: message,
-                    )));
-              }
-            }).catchError((Object error) {
-              showDialog<ErrorDialog>(
-                  context: context,
-                  builder: (BuildContext context) {
-                    return ErrorDialog(error);
-                  });
-            });
-          }
+          completer.future.then((_) {
+            if ([EntityAction.archive, EntityAction.delete].contains(action)) {
+              Navigator.of(context).pop(message);
+            } else if (message != null) {
+              Scaffold.of(context).showSnackBar(SnackBar(
+                      content: SnackBarRow(
+                    message: message,
+                  )));
+            }
+          }).catchError((Object error) {
+            showDialog<ErrorDialog>(
+                context: context,
+                builder: (BuildContext context) {
+                  return ErrorDialog(error);
+                });
+          });
         });
   }
 }

lib/ui/product/edit/product_edit_vm.dart

@@ -92,7 +92,7 @@ class ProductEditVM {
         },
         onActionSelected: (BuildContext context, EntityAction action) {
           final Completer<Null> completer = Completer<Null>();
-          var message = '';
+          String message;
           switch (action) {
             case EntityAction.archive:
               store.dispatch(ArchiveProductRequest(completer, product.id));
@@ -110,10 +110,10 @@ class ProductEditVM {
               store.dispatch(UpdateProduct(product.clone));
               break;
           }
-          return completer.future.then((_) {
+          completer.future.then((_) {
             if ([EntityAction.archive, EntityAction.delete].contains(action)) {
               Navigator.of(context).pop(message);
-            } else if (message.isNotEmpty) {
+            } else if (message != null) {
               Scaffold.of(context).showSnackBar(SnackBar(
                   content: SnackBarRow(
                     message: message,