make word meaning activity refetch new definition if cache expires (#1779)

* make word meaning activity refetch new definition if cache expires

* generated

* bake expire at into response json

* generated

* add expire at in to and from json method

---------

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>
Co-authored-by: ggurdin <46800240+ggurdin@users.noreply.github.com>

lib/pangea/lemmas/lemma_info_repo.dart

@@ -1,39 +1,50 @@
 import 'dart:convert';
-import 'dart:developer';
-
-import 'package:flutter/foundation.dart';
 
 import 'package:get_storage/get_storage.dart';
 import 'package:http/http.dart';
 
+import 'package:fluffychat/pangea/common/config/environment.dart';
+import 'package:fluffychat/pangea/common/network/requests.dart';
 import 'package:fluffychat/pangea/common/network/urls.dart';
-import 'package:fluffychat/pangea/common/utils/error_handler.dart';
 import 'package:fluffychat/pangea/events/models/content_feedback.dart';
 import 'package:fluffychat/pangea/lemmas/lemma_info_request.dart';
 import 'package:fluffychat/pangea/lemmas/lemma_info_response.dart';
 import 'package:fluffychat/widgets/matrix.dart';
-import '../common/config/environment.dart';
-import '../common/network/requests.dart';
 
 class LemmaInfoRepo {
   static final GetStorage _lemmaStorage = GetStorage('lemma_storage');
 
   static void set(LemmaInfoRequest request, LemmaInfoResponse response) {
+    // set expireAt if not set
+    response.expireAt ??= DateTime.now().add(const Duration(minutes: 1));
     _lemmaStorage.write(request.storageKey, response.toJson());
   }
 
   static Future<LemmaInfoResponse> get(
     LemmaInfoRequest request, [
     String? feedback,
+    bool useExpireAt = false,
   ]) async {
     final cachedJson = _lemmaStorage.read(request.storageKey);
 
-    if (cachedJson != null) {
+    final cached =
-      final cached = LemmaInfoResponse.fromJson(cachedJson);
+        cachedJson == null ? null : LemmaInfoResponse.fromJson(cachedJson);
 
+    if (cached != null) {
       if (feedback == null) {
-        // in this case, we just return the cached response
+        // at this point we have a cache without feedback
-        return cached;
+        if (!useExpireAt) {
+          // return cache as is if we're not using expireAt
+          return cached;
+        } else if (cached.expireAt != null) {
+          if (DateTime.now().isBefore(cached.expireAt!)) {
+            // return cache as is if we're using expireAt and it's set but not expired
+            return cached;
+          }
+        }
+        // we intentionally do not handle the case of expired at not set because
+        // old caches won't have them set, and we want to trigger a new
+        // choreo call
       } else {
         // we're adding this within the service to avoid needing to have the widgets
         // save state including the bad response
@@ -42,16 +53,6 @@ class LemmaInfoRepo {
           feedback,
         );
       }
-    } else if (feedback != null) {
-      // the cache should have the request in order for the user to provide feedback
-      // this would be a strange situation and indicate some error in our logic
-      debugger(when: kDebugMode);
-      ErrorHandler.logError(
-        m: 'Feedback provided for a non-cached request',
-        data: request.toJson(),
-      );
-    } else {
-      debugPrint('No cached response for lemma ${request.lemma}, calling API');
     }
 
     final Requests req = Requests(

lib/pangea/lemmas/lemma_info_response.dart

@@ -3,16 +3,21 @@ import 'package:fluffychat/pangea/events/models/content_feedback.dart';
 class LemmaInfoResponse implements JsonSerializable {
   final List<String> emoji;
   final String meaning;
+  DateTime? expireAt;
 
   LemmaInfoResponse({
     required this.emoji,
     required this.meaning,
+    this.expireAt,
   });
 
   factory LemmaInfoResponse.fromJson(Map<String, dynamic> json) {
     return LemmaInfoResponse(
       emoji: (json['emoji'] as List<dynamic>).map((e) => e as String).toList(),
       meaning: json['meaning'] as String,
+      expireAt: json['expireAt'] == null
+          ? null
+          : DateTime.parse(json['expireAt'] as String),
     );
   }
 
@@ -21,6 +26,7 @@ class LemmaInfoResponse implements JsonSerializable {
     return {
       'emoji': emoji,
       'meaning': meaning,
+      'expireAt': expireAt?.toIso8601String(),
     };
   }
 

lib/pangea/toolbar/repo/lemma_meaning_activity_generator.dart

@@ -38,7 +38,7 @@ class LemmaMeaningActivityGenerator {
       userL1: req.userL1,
     );
 
-    final res = await LemmaInfoRepo.get(lemmaDefReq);
+    final res = await LemmaInfoRepo.get(lemmaDefReq, null, true);
 
     final choices = await getDistractorMeanings(lemmaDefReq, 3);