point 36 improvement.

lib/views/pages/sub_workorder/create_sub_workorder_page.dart

@@ -10,6 +10,7 @@ import 'package:test_sa/controllers/providers/api/status_drop_down/report/servic
 import 'package:test_sa/controllers/providers/api/status_drop_down/report/service_types_provider.dart';
 import 'package:test_sa/extensions/context_extension.dart';
 import 'package:test_sa/extensions/int_extensions.dart';
+import 'package:test_sa/extensions/string_extensions.dart';
 import 'package:test_sa/extensions/text_extensions.dart';
 import 'package:test_sa/extensions/widget_extensions.dart';
 import 'package:test_sa/models/device/asset.dart';
@@ -147,10 +148,7 @@ class _CreateSubWorkOrderPageState extends State<CreateSubWorkOrderPage> {
     if (isCurrentUserIsAssistantEmp) {
       // _subWorkOrders.assistantEmployees = [widget.workOrder.assistantEmployees?.first?.copyWith(id: 0)];
       _subWorkOrders.assistantEmployees = [AssistantEmployees(id: 0, user: AssignedEmployee(id: user.userID, name: user.username))];
-    }
-    else {
-
-    }
+    } else {}
     print("isCurrentUserIsAssistantEmp:$isCurrentUserIsAssistantEmp:${widget.workOrder.assistantEmployees?.length}");
     if (_callRequestForWorkOrder == null) {
       _partsProvider = Provider.of<PartsProvider>(context);
@@ -202,6 +200,11 @@ class _CreateSubWorkOrderPageState extends State<CreateSubWorkOrderPage> {
                                       selectedTime.minute,
                                     );
                                     if (selectedDateTime != null) {
+                                      if (_subWorkOrders.visitDate != null && selectedDateTime.isBefore(DateTime.parse(_subWorkOrders.visitDate))) {
+                                        "Visit Date time must be greater then previous date".showToast;
+                                        return;
+                                      }
+
                                       setState(() {
                                         _subWorkOrders.visitDate = selectedDateTime?.toIso8601String();
                                       });
@@ -257,7 +260,7 @@ class _CreateSubWorkOrderPageState extends State<CreateSubWorkOrderPage> {
                             title: context.translation.reason,
                             initialValue: _subWorkOrders.reason,
                             onSelect: (value) {
-                              if(value!=null) {
+                              if (value != null) {
                                 _subWorkOrders.reason = value;
                               }
                             },
@@ -268,10 +271,9 @@ class _CreateSubWorkOrderPageState extends State<CreateSubWorkOrderPage> {
                             title: context.translation.equipmentStatus,
                             initialValue: _subWorkOrders.equipmentStatus,
                             onSelect: (value) {
-                              if(value!=null) {
+                              if (value != null) {
                                 _subWorkOrders.equipmentStatus = value;
                               }
-
                             },
                           ),
                           8.height,
@@ -392,7 +394,7 @@ class _CreateSubWorkOrderPageState extends State<CreateSubWorkOrderPage> {
                             title: context.translation.assignAssistant,
                             assetId: widget.workOrder?.callRequest?.asset?.id,
 
-                              initialValue: (_subWorkOrders.assistantEmployees?.isNotEmpty ?? false) ? _subWorkOrders.assistantEmployees?.first : null,
+                            initialValue: (_subWorkOrders.assistantEmployees?.isNotEmpty ?? false) ? _subWorkOrders.assistantEmployees?.first : null,
                             // initialValue: !isCurrentAssigned
                             //     ? (widget.workOrder.assistantEmployees?.first)
                             //     : (_subWorkOrders.assistantEmployees?.isNotEmpty ?? false)
@@ -477,7 +479,7 @@ class _CreateSubWorkOrderPageState extends State<CreateSubWorkOrderPage> {
                               if (signature == null || signature.isEmpty) return;
                               _subWorkOrders.localEngSignature = signature;
                               _subWorkOrders.engSignature = signature != null ? "${DateTime.now().toIso8601String()}.png|${base64Encode(signature)}" : null;
-                              },
+                            },
                           ),
                           8.height,
                           ESignature(