add tags automatically

covas_mobile/lib/pages/UpdateEventImage.dart

@@ -58,6 +58,7 @@ class _UpdateeventImageState extends State<UpdateeventImage>
   TextEditingController endDatepicker = TextEditingController();
   TextEditingController endTimepicker = TextEditingController();
   final _stringTagController = StringTagController();
+  List<String> initialTags = [];
 
   onTapFunctionDatePicker(
       {required BuildContext context, required String position}) async {
@@ -97,6 +98,13 @@ class _UpdateeventImageState extends State<UpdateeventImage>
     return check;
   }
 
+  convertNulltoArray(List<String> check) {
+    if (check == null) {
+      return [];
+    }
+    return check;
+  }
+
   String formatDate(String date) {
     var splitedDate = date.split("-");
     var day = splitedDate[0];
@@ -248,6 +256,7 @@ class _UpdateeventImageState extends State<UpdateeventImage>
     endDatepicker.text = DateFormat("dd-MM-yyyy").format(pickedEndDate);
     startTimepicker.text = DateFormat("HH-mm").format(pickedStartDate);
     endTimepicker.text = DateFormat("HH-mm").format(pickedEndDate);
+    initialTags = List<String>.from(widget.events['tags'] as List);
   }
 
   @override
@@ -396,7 +405,7 @@ class _UpdateeventImageState extends State<UpdateeventImage>
             ),
             TextFieldTags<String>(
                 textfieldTagsController: _stringTagController,
-                initialTags: [],
+                initialTags: initialTags,
                 textSeparators: const [' ', ','],
                 validator: (String tag) {
                   if (_stringTagController.getTags!.contains(tag)) {