Don’t allow editing cancelled/reversed invoices

lib/data/models/entities.dart

@@ -259,6 +259,8 @@ abstract class BaseEntity implements SelectableEntity {
   bool get isArchived =>
       archivedAt != null && archivedAt > 0 && !(isDeleted ?? false);
 
+  bool get isEditable => !isDeleted;
+
   bool userCanAccess(String userId) =>
       createdUserId == userId || assignedUserId == userId;
 

lib/data/models/invoice_model.dart

@@ -337,6 +337,21 @@ abstract class InvoiceEntity extends Object
 
   bool get hasInvoice => '${invoiceId ?? ''}'.isNotEmpty;
 
+  @override
+  bool get isEditable {
+    if (isDeleted) {
+      return false;
+    }
+
+    if (entityType == EntityType.invoice) {
+      if (isCancelledOrReversed) {
+        return false;
+      }
+    }
+
+    return true;
+  }
+
   int get age {
     int ageInDays = 0;
     if (isPastDue) {

lib/redux/app/app_actions.dart

@@ -740,7 +740,7 @@ void editEntityById(
   final map = store.state.getEntityMap(entityType);
   final entity = map[entityId] as BaseEntity;
 
-  if (entity.isDeleted) {
+  if (!entity.isEditable) {
     return;
   }
 

lib/ui/app/view_scaffold.dart

@@ -87,7 +87,7 @@ class ViewScaffold extends StatelessWidget {
                   userCompany.canEditEntity(entity)
                       ? Builder(builder: (context) {
                           return EditIconButton(
-                            isVisible: !(entity.isDeleted ?? false),
+                            isVisible: entity.isEditable,
                             onPressed: () =>
                                 editEntity(context: context, entity: entity),
                           );