Save timestamp of selected choices

lib/pangea/models/span_data.dart

@@ -4,9 +4,8 @@
 // SpanChoice of text in message from options
 // Call to server for additional/followup info
 
-import 'package:flutter/material.dart';
-
 import 'package:collection/collection.dart';
+import 'package:flutter/material.dart';
 
 import '../enum/span_choice_type.dart';
 import '../enum/span_data_type.dart';
@@ -105,6 +104,7 @@ class SpanChoice {
     required this.type,
     this.feedback,
     this.selected = false,
+    this.timestamp,
   });
   factory SpanChoice.fromJson(Map<String, dynamic> json) {
     return SpanChoice(
@@ -117,6 +117,8 @@ class SpanChoice {
           : SpanChoiceType.bestCorrection,
       feedback: json['feedback'],
       selected: json['selected'] ?? false,
+      timestamp:
+          json['timestamp'] != null ? DateTime.parse(json['timestamp']) : null,
     );
   }
 
@@ -124,12 +126,14 @@ class SpanChoice {
   SpanChoiceType type;
   bool selected;
   String? feedback;
+  DateTime? timestamp;
 
   Map<String, dynamic> toJson() => {
         'value': value,
         'type': type.name,
         'selected': selected,
         'feedback': feedback,
+        'timestamp': timestamp?.toIso8601String(),
       };
 
   String feedbackToDisplay(BuildContext context) {

lib/pangea/widgets/igc/span_card.dart

@@ -55,18 +55,36 @@ class SpanCardState extends State<SpanCard> {
     // debugger(when: kDebugMode);
     super.initState();
     getSpanDetails();
+    // fetchSelected();
   }
 
   //get selected choice
   SpanChoice? get selectedChoice {
     if (selectedChoiceIndex == null ||
         widget.scm.pangeaMatch?.match.choices == null ||
-        widget.scm.pangeaMatch!.match.choices!.length >= selectedChoiceIndex!) {
+        widget.scm.pangeaMatch!.match.choices!.length <= selectedChoiceIndex!) {
       return null;
     }
     return widget.scm.pangeaMatch?.match.choices?[selectedChoiceIndex!];
   }
 
+  void fetchSelected() {
+    if (widget.scm.pangeaMatch?.match.choices == null) {
+      return;
+    }
+    if (selectedChoiceIndex == null) {
+      DateTime? mostRecent;
+      for (int i = 0; i < widget.scm.pangeaMatch!.match.choices!.length; i++) {
+        final choice = widget.scm.pangeaMatch?.match.choices![i];
+        if (choice!.timestamp != null &&
+            (mostRecent == null || choice.timestamp!.isAfter(mostRecent))) {
+          mostRecent = choice.timestamp;
+          selectedChoiceIndex = i;
+        }
+      }
+    }
+  }
+
   Future<void> getSpanDetails() async {
     try {
       if (widget.scm.pangeaMatch?.isITStart ?? false) return;
@@ -110,6 +128,16 @@ class WordMatchContent extends StatelessWidget {
 
   Future<void> onChoiceSelect(int index) async {
     controller.selectedChoiceIndex = index;
+    controller
+        .widget
+        .scm
+        .choreographer
+        .igc
+        .igcTextData
+        ?.matches[controller.widget.scm.matchIndex]
+        .match
+        .choices?[index]
+        .timestamp = DateTime.now();
     controller
         .widget
         .scm
@@ -152,6 +180,7 @@ class WordMatchContent extends StatelessWidget {
         offset: controller.widget.scm.pangeaMatch?.match.offset,
       );
     }
+
     final MatchCopy matchCopy = MatchCopy(
       context,
       controller.widget.scm.pangeaMatch!,