Implement tender workflows and dashboard integration

lib/view_models/tenders_view_model.dart

@@ -2,6 +2,7 @@ import 'package:flutter/material.dart';
 import 'package:intl/intl.dart';
 import 'package:tm_app/core/utils/device_utils.dart';
 import 'package:tm_app/core/utils/logger.dart';
+import 'package:tm_app/core/network/app_exceptions.dart';
 import 'package:tm_app/data/repositories/tenders_repository.dart';
 import 'package:tm_app/data/services/model/feedback_data/feedback_data.dart';
 import 'package:tm_app/data/services/model/feedback_response/feedback_response.dart';
@@ -36,6 +37,12 @@ class TendersViewModel with ChangeNotifier {
   String? get searchQuery => _searchQuery;
 
   List<FeedbackData> feedbacks = [];
+  final Set<String> _hydratedFeedbackTenderIds = <String>{};
+  final Set<String> _feedbackHydrationsInFlight = <String>{};
+  final Set<String> _feedbackRequestsInFlight = <String>{};
+
+  bool isFeedbackLoading(String tenderId) =>
+      _feedbackRequestsInFlight.contains(tenderId);
 
   static const int _pageSize = 10;
 
@@ -207,8 +214,7 @@ class TendersViewModel with ChangeNotifier {
           _currentOffset = meta!.offset!;
         }
         final tenders = _tendersResponse?.data?.tenders ?? [];
-        _hasMoreData =
-            meta?.hasMore ?? (tenders.length >= _pageSize);
+        _hasMoreData = meta?.hasMore ?? (tenders.length >= _pageSize);
         if (tenders.isNotEmpty) {
           if (fetchAllFeedbacks) {
             for (final tender in tenders) {
@@ -263,8 +269,13 @@ class TendersViewModel with ChangeNotifier {
             data: result.value.data?.copyWith(tenders: combined),
           );
           final newMeta = result.value.meta;
-          _hasMoreData =
-              newMeta?.hasMore ?? (newTenders.length >= _pageSize);
+          _hasMoreData = newMeta?.hasMore ?? (newTenders.length >= _pageSize);
+          for (final tender in newTenders) {
+            final id = tender.id;
+            if (id != null && !_hydratedFeedbackTenderIds.contains(id)) {
+              getTenderFeedback(id);
+            }
+          }
         } else {
           _hasMoreData = false;
         }
@@ -283,14 +294,18 @@ class TendersViewModel with ChangeNotifier {
   }
 
   Future<void> getTenderFeedback(String tenderId) async {
-    _errorMessage = null;
-    notifyListeners();
+    if (_hydratedFeedbackTenderIds.contains(tenderId) ||
+        _feedbackHydrationsInFlight.contains(tenderId)) {
+      return;
+    }
+    _feedbackHydrationsInFlight.add(tenderId);
 
     final result = await _tendersRepository.getTenderFeedback(
       tenderId: tenderId,
     );
     switch (result) {
       case Ok<FeedbackResponse>():
+        _hydratedFeedbackTenderIds.add(tenderId);
         _feedbackData = result.value.data;
         if (_feedbackData != null) {
           final index = feedbacks.indexWhere(
@@ -311,19 +326,33 @@ class TendersViewModel with ChangeNotifier {
         }
         break;
       case Error<FeedbackResponse>():
-        _errorMessage = result.error.toString();
+        if (result.error is NotFoundException) {
+          // A 404 is the expected representation of neutral feedback state.
+          feedbacks.removeWhere((feedback) => feedback.tenderId == tenderId);
+          _hydratedFeedbackTenderIds.add(tenderId);
+        } else {
+          _feedbackErrorMessage = result.error.toString();
+        }
         break;
     }
+    _feedbackHydrationsInFlight.remove(tenderId);
     notifyListeners();
-    _errorMessage = null;
-    notifyListeners();
+    if (_feedbackErrorMessage != null) {
+      _feedbackErrorMessage = null;
+      notifyListeners();
+    }
   }
 
-  Future<void> toogleFeedback({
+  Future<void> toggleFeedback({
     required String tenderId,
     required String feedbackType,
   }) async {
+    if (_feedbackRequestsInFlight.contains(tenderId)) {
+      return;
+    }
+
     _feedbackErrorMessage = null;
+    _feedbackRequestsInFlight.add(tenderId);
 
     final existingFeedback = getFeedbackForTender(tenderId);
     final existingFeedbackIndex = feedbacks.indexWhere(
@@ -335,13 +364,13 @@ class TendersViewModel with ChangeNotifier {
     if (existingFeedback == null) {
       optimisticFeedback = FeedbackData(
         companyId: null,
-        createdAt: DateTime.now().millisecondsSinceEpoch,
+        createdAt: DateTime.now().millisecondsSinceEpoch ~/ 1000,
         customerId: null,
         feedbackType: feedbackType,
         id: null,
         tenderId: tenderId,
         tender: null,
-        updatedAt: DateTime.now().millisecondsSinceEpoch,
+        updatedAt: DateTime.now().millisecondsSinceEpoch ~/ 1000,
       );
       feedbacks.add(optimisticFeedback);
     } else {
@@ -353,7 +382,7 @@ class TendersViewModel with ChangeNotifier {
       } else {
         optimisticFeedback = existingFeedback.copyWith(
           feedbackType: feedbackType,
-          updatedAt: DateTime.now().millisecondsSinceEpoch,
+          updatedAt: DateTime.now().millisecondsSinceEpoch ~/ 1000,
         );
         if (existingFeedbackIndex != -1) {
           feedbacks[existingFeedbackIndex] = optimisticFeedback;
@@ -371,9 +400,13 @@ class TendersViewModel with ChangeNotifier {
     switch (result) {
       case Ok<FeedbackResponse>():
         _feedbackData = result.value.data;
-        if (_feedbackData != null) {
+        final responseType = _feedbackData?.feedbackType;
+        if (responseType == 'unlike' || responseType == 'undislike') {
+          feedbacks.removeWhere((feedback) => feedback.tenderId == tenderId);
+          _feedbackData = null;
+        } else if (_feedbackData != null) {
           final index = feedbacks.indexWhere(
-            (f) => f.tender == _feedbackData!.tender,
+            (feedback) => feedback.tenderId == tenderId,
           );
           if (index != -1) {
             feedbacks[index] = _feedbackData!;
@@ -383,6 +416,7 @@ class TendersViewModel with ChangeNotifier {
         } else {
           feedbacks.removeWhere((f) => f.tenderId == tenderId);
         }
+        _hydratedFeedbackTenderIds.add(tenderId);
         break;
       case Error<FeedbackResponse>():
         if (existingFeedback == null) {
@@ -401,13 +435,24 @@ class TendersViewModel with ChangeNotifier {
         break;
     }
 
+    _feedbackRequestsInFlight.remove(tenderId);
     notifyListeners();
     _feedbackErrorMessage = null;
     notifyListeners();
   }
 
+  /// Kept temporarily for callers compiled against the old misspelled API.
+  @Deprecated('Use toggleFeedback')
+  Future<void> toogleFeedback({
+    required String tenderId,
+    required String feedbackType,
+  }) => toggleFeedback(tenderId: tenderId, feedbackType: feedbackType);
+
   void clearFeedbacks() {
     feedbacks.clear();
+    _hydratedFeedbackTenderIds.clear();
+    _feedbackHydrationsInFlight.clear();
+    _feedbackRequestsInFlight.clear();
     _feedbackData = null;
     _feedbackErrorMessage = null;
     notifyListeners();