Implement tender workflows and dashboard integration

lib/view_models/home_view_model.dart

@@ -4,6 +4,8 @@ import 'package:tm_app/data/services/model/recommended_tenders_response/recommen
 import 'package:tm_app/data/services/model/tender_approvals_response/tender_approvals_response.dart';
 import 'package:tm_app/data/services/model/tender_approvals_stats_response/tender_approvals_stats_response.dart';
 import 'package:tm_app/data/services/model/tender_data/tender_data.dart';
+import 'package:tm_app/data/services/model/feedback_stats_response/feedback_stat_response.dart';
+import 'package:tm_app/data/services/model/tender_submission/tender_submission.dart';
 
 import '../data/repositories/home_repository.dart';
 import '../data/services/model/home/home_response/home_response_model.dart';
@@ -44,6 +46,7 @@ class HomeViewModel with ChangeNotifier {
 
   RecommendedTendersResponse? _recommendedTendersResponse;
   TenderApprovalsStatsResponse? tenderApprovalsStateResponse;
+  TenderSubmissionStats? tenderSubmissionStats;
   int userLikedTendersCount = 0;
   final List<TenderData> _tenders = [];
   final int _pageSize = 10;
@@ -71,11 +74,15 @@ class HomeViewModel with ChangeNotifier {
     _isRecommendedMode = false;
     data = null;
     tenderApprovalsStateResponse = null;
+    tenderSubmissionStats = null;
     notifyListeners();
 
-    await getApprovedStates();
-    await getYourTenders(reset: true);
-    await loadUserLikedTendersCount();
+    await Future.wait([
+      getApprovedStates(),
+      getYourTenders(reset: true),
+      loadUserLikedTendersCount(),
+      loadSubmissionStats(),
+    ]);
 
     if (_errorMessage != null) {
       _isLoading = false;
@@ -199,19 +206,38 @@ class HomeViewModel with ChangeNotifier {
   }
 
   Future<void> loadUserLikedTendersCount() async {
-    final result = await _homeRepository.getUserLikedTendersCount();
+    final result = await _homeRepository.getCustomerFeedbackStats();
 
     switch (result) {
-      case Ok<int>():
-        userLikedTendersCount = result.value;
+      case Ok<FeedbackStatResponse>():
+        userLikedTendersCount = result.value.data?.totalLikes ?? 0;
         break;
-      case Error<int>():
+      case Error<FeedbackStatResponse>():
         userLikedTendersCount = 0;
         break;
     }
     notifyListeners();
   }
 
+  Future<void> loadSubmissionStats() async {
+    final result = await _homeRepository.getSubmissionStats();
+    switch (result) {
+      case Ok<TenderSubmissionStatsResponse>():
+        tenderSubmissionStats = result.value.data;
+        break;
+      case Error<TenderSubmissionStatsResponse>():
+        tenderSubmissionStats = null;
+        break;
+    }
+    notifyListeners();
+  }
+
+  int get approvedTendersCount =>
+      tenderApprovalsStateResponse?.data?.submittedTenders ?? 0;
+
+  int get submittedTendersCount =>
+      tenderSubmissionStats?.byStage['submitted'] ?? 0;
+
   double get partnershipCount {
     return tenderApprovalsStateResponse?.data?.partnershipCount?.toDouble() ??
         0.0;

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();

lib/view_models/your_tenders_view_model.dart

@@ -3,9 +3,11 @@ import 'package:intl/intl.dart';
 import 'package:tm_app/core/theme/colors.dart';
 import 'package:tm_app/core/utils/error_utils.dart';
 import 'package:tm_app/core/utils/result.dart';
+import 'package:tm_app/core/network/app_exceptions.dart';
 import 'package:tm_app/data/repositories/your_tenders_repository.dart';
 import 'package:tm_app/data/services/model/liked_tenders_response/liked_tenders_response.dart';
 import 'package:tm_app/data/services/model/tender_approvals_response/tender_approvals_response.dart';
+import 'package:tm_app/data/services/model/tender_submission/tender_submission.dart';
 import 'package:tm_app/views/your_tenders/strings/your_tenders_strings.dart';
 
 import '../core/constants/assets.dart';
@@ -22,6 +24,21 @@ class YourTendersViewModel with ChangeNotifier {
   String? errorMessage;
   TenderApprovalsResponse? data;
   LikedTendersResponse? likedTendersData;
+  TenderSubmissionsResponse? submissionsData;
+  TenderSubmissionStats? submissionStats;
+  String selectedSubmissionStage = 'opportunity';
+  String? updatingSubmissionId;
+  String? submissionActionError;
+
+  bool get isSubmissionWorkflow =>
+      selectedStatus == TenderApprovalStatus.submitted.value;
+
+  static const submissionStages = <String>[
+    'opportunity',
+    'in_progress',
+    'submitted',
+    'not_applied',
+  ];
 
   // Pagination state for feedback lists
   bool isLoadingMore = false;
@@ -247,6 +264,8 @@ class YourTendersViewModel with ChangeNotifier {
     // Clear main data
     data = null;
     likedTendersData = null;
+    submissionsData = null;
+    submissionStats = null;
 
     // Clear loading states
     isLoading = false;
@@ -269,6 +288,7 @@ class YourTendersViewModel with ChangeNotifier {
   Future<void> callWithFilter() async {
     likedTendersData = null;
     data = null;
+    submissionsData = null;
     isLoading = true;
     notifyListeners();
 
@@ -282,14 +302,8 @@ class YourTendersViewModel with ChangeNotifier {
       );
       await getTenders(requestModel: requestModel, reset: true);
     } else if (selectedStatus == TenderApprovalStatus.submitted.value) {
-      final requestModel = GetTendersRequestModel(
-        status: TenderApprovalStatus.submitted.value,
-        createdFrom: startDateUnix,
-        createdTo: endDateUnix,
-        limit: _tendersLimit,
-        offset: _tendersOffset,
-      );
-      await getTenders(requestModel: requestModel, reset: true);
+      selectedSubmissionStage = 'submitted';
+      await loadSubmissions();
     } else if (selectedStatus == TenderFeedback.liked.value) {
       await getTendersFeedback(
         feedbackType: TenderFeedback.liked.value,
@@ -318,6 +332,11 @@ class YourTendersViewModel with ChangeNotifier {
   int currentPage = 1;
 
   int get totalPages {
+    if (isSubmissionWorkflow && submissionsData?.meta != null) {
+      return submissionsData!.meta!.pages == 0
+          ? 1
+          : submissionsData!.meta!.pages;
+    }
     if (likedTendersData?.data?.meta?.pages != null) {
       return likedTendersData!.data!.meta!.pages!;
     }
@@ -329,6 +348,10 @@ class YourTendersViewModel with ChangeNotifier {
 
   Future<void> jumpToPage(int page) async {
     currentPage = page;
+    if (isSubmissionWorkflow) {
+      await loadSubmissions(offset: (page - 1) * 20);
+      return;
+    }
     _offset = (page - 1) * _limit;
     _tendersOffset = (page - 1) * _tendersLimit;
 
@@ -340,6 +363,94 @@ class YourTendersViewModel with ChangeNotifier {
     await callWithFilter();
   }
 
+  Future<void> selectSubmissionStage(String stage) async {
+    if (!submissionStages.contains(stage) || stage == selectedSubmissionStage) {
+      return;
+    }
+    selectedSubmissionStage = stage;
+    submissionActionError = null;
+    currentPage = 1;
+    notifyListeners();
+    await loadSubmissions();
+  }
+
+  Future<void> loadSubmissions({int offset = 0}) async {
+    isLoading = true;
+    errorMessage = null;
+    notifyListeners();
+
+    final result = await yourTendersRepository.getSubmissions(
+      stage: selectedSubmissionStage,
+      limit: 20,
+      offset: offset,
+    );
+    switch (result) {
+      case Ok<TenderSubmissionsResponse>():
+        submissionsData = result.value;
+        currentPage = result.value.meta?.page ?? 1;
+      case Error<TenderSubmissionsResponse>():
+        errorMessage = ErrorUtils.getErrorMessage(result.error);
+    }
+
+    final statsResult = await yourTendersRepository.getSubmissionStats();
+    switch (statsResult) {
+      case Ok<TenderSubmissionStatsResponse>():
+        submissionStats = statsResult.value.data;
+      case Error<TenderSubmissionStatsResponse>():
+        // The list remains useful when stats are temporarily unavailable.
+        break;
+    }
+
+    isLoading = false;
+    notifyListeners();
+  }
+
+  Future<bool> updateSubmissionStatus({
+    required TenderSubmission submission,
+    required String status,
+    String? reason,
+    String? description,
+  }) async {
+    if (submission.id.isEmpty || submission.isTerminal) {
+      return false;
+    }
+
+    updatingSubmissionId = submission.id;
+    submissionActionError = null;
+    notifyListeners();
+    final result = await yourTendersRepository.updateSubmissionStatus(
+      id: submission.id,
+      status: status,
+      reason: reason,
+      description: description,
+    );
+
+    switch (result) {
+      case Ok<TenderSubmissionResponse>():
+        updatingSubmissionId = null;
+        await loadSubmissions();
+        return true;
+      case Error<TenderSubmissionResponse>():
+        updatingSubmissionId = null;
+        if (result.error is AppException &&
+            (result.error as AppException).statusCode == 409) {
+          await loadSubmissions();
+          submissionActionError =
+              'This submission changed elsewhere. The latest state has been loaded; please try again.';
+          notifyListeners();
+          return false;
+        }
+        submissionActionError = ErrorUtils.getErrorMessage(result.error);
+        notifyListeners();
+        return false;
+    }
+  }
+
+  void dismissSubmissionActionError() {
+    submissionActionError = null;
+    notifyListeners();
+  }
+
   Color getBackGroundColorByStatus(String status) {
     if (status == TenderFeedback.liked.value ||
         status == TenderApprovalStatus.submitted.value) {