Implement tender workflows and dashboard integration

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) {