better error handling for range errors in span cards

lib/pangea/choreographer/controllers/igc_controller.dart

@@ -113,7 +113,11 @@ class IgcController {
       ),
     );
 
-    igcTextData!.matches[matchIndex].match = response.span;
+    try {
+      igcTextData!.matches[matchIndex].match = response.span;
+    } catch (err, s) {
+      ErrorHandler.logError(e: err, s: s);
+    }
 
     choreographer.setState();
   }

lib/pangea/models/representation_content_model.dart

@@ -1,8 +1,5 @@
-import 'package:fluffychat/pangea/constants/language_keys.dart';
 import 'package:fluffychat/pangea/models/speech_to_text_models.dart';
-import 'package:fluffychat/pangea/utils/error_handler.dart';
 import 'package:matrix/matrix.dart';
-import 'package:sentry_flutter/sentry_flutter.dart';
 
 /// this class is contained within a [RepresentationEvent]
 /// this event is the child of a [EventTypes.Message]
@@ -56,14 +53,6 @@ class PangeaRepresentation {
   });
 
   factory PangeaRepresentation.fromJson(Map<String, dynamic> json) {
-    if (json[_langCodeKey] == LanguageKeys.unknownLanguage) {
-      ErrorHandler.logError(
-        e: Exception("Language code cannot be 'unk'"),
-        s: StackTrace.current,
-        data: {"rep_content": json},
-        level: SentryLevel.warning,
-      );
-    }
     return PangeaRepresentation(
       langCode: json[_langCodeKey],
       text: json[_textKey],

lib/pangea/models/span_card_model.dart

@@ -1,5 +1,6 @@
 import 'package:fluffychat/pangea/choreographer/controllers/choreographer.dart';
 import 'package:fluffychat/pangea/models/pangea_match_model.dart';
+import 'package:fluffychat/pangea/utils/error_handler.dart';
 
 class SpanCardModel {
   // IGCTextData igcTextData;
@@ -21,6 +22,18 @@ class SpanCardModel {
     required this.choreographer,
   });
 
-  PangeaMatch? get pangeaMatch =>
-      choreographer.igc.igcTextData?.matches[matchIndex];
+  PangeaMatch? get pangeaMatch {
+    if (choreographer.igc.igcTextData == null) return null;
+    if (matchIndex >= choreographer.igc.igcTextData!.matches.length) {
+      ErrorHandler.logError(
+        m: "matchIndex out of bounds in span card",
+        data: {
+          "matchIndex": matchIndex,
+          "matchesLength": choreographer.igc.igcTextData?.matches.length,
+        },
+      );
+      return null;
+    }
+    return choreographer.igc.igcTextData?.matches[matchIndex];
+  }
 }

lib/pangea/widgets/igc/span_card.dart

@@ -58,10 +58,14 @@ class SpanCardState extends State<SpanCard> {
   }
 
   //get selected choice
-  SpanChoice? get selectedChoice => selectedChoiceIndex != null &&
-          widget.scm.pangeaMatch?.match.choices != null
-      ? widget.scm.pangeaMatch!.match.choices![selectedChoiceIndex!]
-      : null;
+  SpanChoice? get selectedChoice {
+    if (selectedChoiceIndex == null ||
+        widget.scm.pangeaMatch?.match.choices == null ||
+        widget.scm.pangeaMatch!.match.choices!.length >= selectedChoiceIndex!) {
+      return null;
+    }
+    return widget.scm.pangeaMatch?.match.choices?[selectedChoiceIndex!];
+  }
 
   Future<void> getSpanDetails() async {
     try {