Pass previous X messages to IGC

lib/pangea/choreographer/controllers/choreographer.dart

@@ -9,16 +9,19 @@ import 'package:fluffychat/pangea/controllers/pangea_controller.dart';
 import 'package:fluffychat/pangea/controllers/subscription_controller.dart';
 import 'package:fluffychat/pangea/enum/assistance_state_enum.dart';
 import 'package:fluffychat/pangea/enum/edit_type.dart';
+import 'package:fluffychat/pangea/matrix_event_wrappers/pangea_message_event.dart';
 import 'package:fluffychat/pangea/models/it_step.dart';
 import 'package:fluffychat/pangea/models/representation_content_model.dart';
 import 'package:fluffychat/pangea/models/space_model.dart';
 import 'package:fluffychat/pangea/models/tokens_event_content_model.dart';
+import 'package:fluffychat/pangea/repo/igc_repo.dart';
 import 'package:fluffychat/pangea/utils/any_state_holder.dart';
 import 'package:fluffychat/pangea/utils/error_handler.dart';
 import 'package:fluffychat/pangea/utils/overlay.dart';
 import 'package:fluffychat/pangea/widgets/igc/paywall_card.dart';
 import 'package:flutter/foundation.dart';
 import 'package:flutter/material.dart';
+import 'package:matrix/matrix.dart';
 import 'package:sentry_flutter/sentry_flutter.dart';
 
 import '../../../widgets/matrix.dart';
@@ -66,6 +69,36 @@ class Choreographer {
     clear();
   }
 
+  List<PreviousMessage> prevMessages() {
+    const int howFarBack = 5;
+    final List<Event> events = chatController.timeline?.events ?? [];
+    final List<PreviousMessage> messages = [];
+    for (final Event event in events) {
+      if (event.messageType == MessageTypes.Text ||
+          event.messageType == MessageTypes.Audio) {
+        final Map<String, Object?>? content =
+            (event.messageType == MessageTypes.Text)
+                ? event.content
+                : (event as PangeaMessageEvent)
+                    .getSpeechToTextLocalOnly(l1LangCode, l2LangCode)
+                    ?.toJson();
+        if (content != null) {
+          messages.add(
+            PreviousMessage(
+              event.content,
+              event.senderId,
+              event.originServerTs,
+            ),
+          );
+          if (messages.length >= howFarBack) {
+            return messages;
+          }
+        }
+      }
+    }
+    return messages;
+  }
+
   void send(BuildContext context) {
     if (isFetching) return;
 

lib/pangea/choreographer/controllers/igc_controller.dart

@@ -43,6 +43,7 @@ class IgcController {
         userL2: choreographer.l2LangCode!,
         enableIGC: choreographer.igcEnabled && !onlyTokensAndLanguageDetection,
         enableIT: choreographer.itEnabled && !onlyTokensAndLanguageDetection,
+        prevMessages: choreographer.prevMessages(),
       );
 
       final IGCTextData igcTextDataResponse = await IgcRepo.getIGC(

lib/pangea/matrix_event_wrappers/pangea_message_event.dart

@@ -269,6 +269,21 @@ class PangeaMessageEvent {
             null;
       }).toSet();
 
+  SpeechToTextModel? getSpeechToTextLocalOnly(
+    String? l1Code,
+    String? l2Code,
+  ) {
+    if (l1Code == null || l2Code == null) {
+      return null;
+    }
+    return representations
+        .firstWhereOrNull(
+          (element) => element.content.speechToText != null,
+        )
+        ?.content
+        .speechToText;
+  }
+
   Future<SpeechToTextModel?> getSpeechToText(
     String l1Code,
     String l2Code,

lib/pangea/repo/igc_repo.dart

@@ -94,12 +94,27 @@ class IgcRepo {
   }
 }
 
+/// Previous text/audio messages sent in chat
+/// Contain message content, sender, and timestamp
+class PreviousMessage {
+  Map<String, Object?> content;
+  String sender;
+  DateTime timestamp;
+
+  PreviousMessage(
+    this.content,
+    this.sender,
+    this.timestamp,
+  );
+}
+
 class IGCRequestBody {
   String fullText;
   String userL1;
   String userL2;
   bool enableIT;
   bool enableIGC;
+  List<PreviousMessage> prevMessages;
 
   IGCRequestBody({
     required this.fullText,
@@ -107,6 +122,7 @@ class IGCRequestBody {
     required this.userL2,
     required this.enableIGC,
     required this.enableIT,
+    required this.prevMessages,
   });
 
   Map<String, dynamic> toJson() => {