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import 'package:flutter/material.dart';
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import 'package:test_sa/controllers/api_routes/api_manager.dart';
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import 'package:test_sa/controllers/api_routes/urls.dart';
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import 'package:test_sa/controllers/providers/api/user_provider.dart';
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import 'package:test_sa/modules/site_request_module/models/dropdown_models.dart';
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import 'package:test_sa/modules/site_request_module/models/request_type_model.dart';
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import 'package:test_sa/modules/site_request_module/models/site_request_model.dart';
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import 'package:test_sa/models/lookup.dart';
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import 'dart:convert';
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import 'package:http/http.dart';
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/// Provider for managing site request operations including:
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/// - Fetching request types
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/// - Managing user's current sites
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/// - Submitting site requests
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/// - Fetching and paginating request history
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class SiteRequestProvider extends ChangeNotifier {
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// Constants
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static const int _defaultPageSize = 10;
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static const String _errorFetchFailed = 'Failed to fetch data';
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static const String _errorSubmitFailed = 'Failed to submit request';
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// Loading states
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bool _loading = false;
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bool _isLoadingMore = false;
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// Data
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List<RequestTypeModel> _requestTypes = [];
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List<SiteRequestSiteModel> _userCurrentSites = [];
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List<SiteRequestModel> _requestHistory = [];
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// Pagination
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int _currentPage = 1;
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int _pageSize = _defaultPageSize;
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bool _hasMoreData = true;
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// Error handling
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String? _errorMessage;
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int? stateCode;
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// Getters
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bool get loading => _loading;
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bool get isLoadingMore => _isLoadingMore;
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String? get errorMessage => _errorMessage;
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int get currentPage => _currentPage;
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bool get hasMoreData => _hasMoreData;
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List<RequestTypeModel> get requestTypes => _requestTypes;
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List<SiteRequestSiteModel> get userCurrentSites => _userCurrentSites;
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List<SiteRequestModel> get requestHistory => _requestHistory;
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// User helper methods
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String getCurrentUserEmployeeId(UserProvider userProvider) => userProvider.user?.userID ?? '';
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String getCurrentUserFullName(UserProvider userProvider) => userProvider.user?.username ?? '';
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String getCurrentUserEmail(UserProvider userProvider) => userProvider.user?.email ?? '';
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String getCurrentUserMobile(UserProvider userProvider) => userProvider.user?.phoneNumber ?? '';
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String getCurrentUserExtension(UserProvider userProvider) => userProvider.user?.extensionNo ?? '';
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String getCurrentUserRole(UserProvider userProvider) {
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if (userProvider.user?.userRoles != null && userProvider.user!.userRoles!.isNotEmpty) {
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return userProvider.user!.userRoles!.first.name ?? '';
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}
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return '';
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}
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List<String> getCurrentUserAssignedSites(UserProvider userProvider) => [];
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bool hasAssignedSites(List<String> assignedSites) => assignedSites.isNotEmpty;
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// Setter
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set loading(bool value) {
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_loading = value;
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notifyListeners();
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}
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/// Fetches available request types from the server
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Future<int> fetchRequestTypes() async {
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if (_loading) return -2;
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return _performApiCall(
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apiCall: () => ApiManager.instance.get(URLs.getSiteRequestTypes, enableToastMessage: false),
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onSuccess: (responseData) {
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List listJson = responseData['data'] ?? responseData;
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_requestTypes = listJson
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.map((item) => Lookup.fromJson(item))
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.map((lookup) => RequestTypeModel(
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id: lookup.id?.toString() ?? lookup.value?.toString() ?? '',
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name: lookup.name ?? '',
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value: lookup.value,
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))
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.toList();
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},
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errorMessage: 'Failed to fetch request types',
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);
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}
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/// Fetches user's current sites for Change/Remove Site operations
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Future<int> fetchUserCurrentSites(String userId) async {
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if (_loading) return -2;
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return _performApiCall(
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apiCall: () => ApiManager.instance.post(URLs.getUserSites(userId), showToast: false, body: {}),
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onSuccess: (responseData) {
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List listJson = responseData['data'] ?? [];
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_userCurrentSites = listJson
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.map((item) => SiteRequestSiteModel(
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id: item['siteId']?.toString() ?? '',
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name: item['siteName'] ?? '',
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))
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.toList();
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},
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errorMessage: 'Failed to fetch user sites',
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);
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}
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/// Submits a site request to the server
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Future<bool> submitSiteRequest(SiteRequestModel request, UserProvider userProvider) async {
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loading = true;
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_errorMessage = null;
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notifyListeners();
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try {
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final isChangeSiteRequest = _requestTypes.any((type) =>
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type.identifier == request.requestType && (type.name?.toLowerCase().contains('change') ?? false));
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final requestBody = _buildRequestBody(request, userProvider, isChangeSiteRequest);
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final response = await ApiManager.instance.post(URLs.submitSiteRequest, body: requestBody);
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if (response.statusCode >= 200 && response.statusCode < 300) {
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_handleSubmitSuccess(response, request);
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return true;
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} else {
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_handleSubmitError(response);
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return false;
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}
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} catch (error) {
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_errorMessage = '$_errorSubmitFailed: $error';
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loading = false;
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notifyListeners();
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return false;
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}
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}
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/// Fetches paginated site requests
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Future<void> fetchSiteRequests({
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int? pageSize,
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int? pageNumber,
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bool loadMore = false,
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required UserProvider userProvider,
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}) async {
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final size = pageSize ?? _pageSize;
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final page = pageNumber ?? (loadMore ? _currentPage + 1 : 1);
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if (size <= 0 || page < 1) {
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_errorMessage = 'Invalid pagination parameters';
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notifyListeners();
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return;
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}
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_setLoadingState(loadMore);
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try {
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final response = await ApiManager.instance.post(
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URLs.getSiteRequests,
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body: {
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"pageSize": size,
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"pageNumber": page,
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"userId": getCurrentUserEmployeeId(userProvider),
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},
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);
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if (response.statusCode == 200) {
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_handleFetchSuccess(response, page, size, loadMore);
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} else {
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_errorMessage = _errorFetchFailed;
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}
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} catch (e) {
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_errorMessage = 'Error: ${e.toString()}';
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} finally {
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_resetLoadingState();
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}
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}
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/// Loads more site requests (pagination)
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Future<void> loadMoreSiteRequests({required UserProvider userProvider}) async {
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if (!_hasMoreData || _isLoadingMore) return;
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await fetchSiteRequests(loadMore: true, userProvider: userProvider);
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}
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/// Refreshes site requests (resets to first page)
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Future<void> refreshSiteRequests({required UserProvider userProvider}) async {
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await fetchSiteRequests(pageNumber: 1, pageSize: _pageSize, userProvider: userProvider);
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}
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/// Resets provider state
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void reset() {
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_loading = false;
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_errorMessage = null;
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_requestHistory.clear();
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notifyListeners();
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}
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// Private helper methods
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/// Generic API call handler to reduce duplication
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Future<int> _performApiCall({
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required Future<Response> Function() apiCall,
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required void Function(dynamic) onSuccess,
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required String errorMessage,
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}) async {
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_loading = true;
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_errorMessage = null;
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notifyListeners();
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try {
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final response = await apiCall();
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stateCode = response.statusCode;
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if (response.statusCode >= 200 && response.statusCode < 300) {
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final responseData = json.decode(response.body);
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onSuccess(responseData);
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} else {
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_errorMessage = errorMessage;
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}
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_loading = false;
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notifyListeners();
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return response.statusCode;
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} catch (error) {
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_loading = false;
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stateCode = -1;
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_errorMessage = errorMessage;
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notifyListeners();
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return -1;
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}
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}
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Map<String, dynamic> _buildRequestBody(
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SiteRequestModel request,
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UserProvider userProvider,
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bool isChangeSiteRequest,
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) {
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final siteIdsArray = request.siteIds.asMap().entries.map((entry) {
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final index = entry.key;
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return {
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"id": 0,
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"siteId": int.tryParse(request.siteIds[index]) ?? 0,
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"siteName": request.siteNames[index],
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"oldSiteId": (isChangeSiteRequest &&
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request.oldSiteIds != null &&
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index < request.oldSiteIds!.length)
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? int.tryParse(request.oldSiteIds![index]) ?? 0
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: 0,
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"oldSitName": (isChangeSiteRequest &&
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request.oldSiteNames != null &&
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index < request.oldSiteNames!.length)
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? request.oldSiteNames![index]
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: ""
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};
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}).toList();
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final departmentIdsArray = (request.departmentIds != null && request.departmentIds!.isNotEmpty)
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? request.departmentIds!.asMap().entries.map((entry) {
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return {
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"id": 0,
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"departmentId": int.tryParse(request.departmentIds![entry.key]) ?? 0,
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"departmentName": request.departmentNames![entry.key],
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};
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}).toList()
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: [];
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return {
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"id": 0,
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"userId": getCurrentUserEmployeeId(userProvider),
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"requestTypeId": int.tryParse(request.requestType) ?? 0,
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"siteIds": siteIdsArray,
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"departmentIds": departmentIdsArray,
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};
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}
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void _handleSubmitSuccess(Response response, SiteRequestModel request) {
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try {
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final responseData = json.decode(response.body);
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final requestWithId = request.copyWith(
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id: responseData['id']?.toString() ?? 'REQ_${DateTime.now().millisecondsSinceEpoch}',
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status: responseData['status']?.toString() ?? 'Pending',
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requestDate: DateTime.now(),
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);
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_requestHistory.insert(0, requestWithId);
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} catch (e) {
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_errorMessage = 'Request submitted but failed to parse response';
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} finally {
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loading = false;
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notifyListeners();
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}
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}
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void _handleSubmitError(Response response) {
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try {
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final errorData = json.decode(response.body);
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_errorMessage = errorData['message'] ?? _errorSubmitFailed;
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} catch (e) {
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_errorMessage = _errorSubmitFailed;
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}
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loading = false;
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notifyListeners();
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}
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void _setLoadingState(bool loadMore) {
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if (loadMore) {
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_isLoadingMore = true;
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} else {
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loading = true;
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_currentPage = 1;
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_hasMoreData = true;
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_requestHistory.clear();
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}
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_errorMessage = null;
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notifyListeners();
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}
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void _handleFetchSuccess(Response response, int page, int size, bool loadMore) {
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final data = json.decode(response.body);
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if (data['isSuccess'] == true) {
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final siteRequests = (data['data'] as List?)
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?.map((item) => SiteRequestModel.fromJson(item))
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.toList() ?? [];
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if (loadMore) {
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_requestHistory.addAll(siteRequests);
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} else {
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_requestHistory.clear();
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_requestHistory.addAll(siteRequests);
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}
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_currentPage = page;
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_hasMoreData = siteRequests.length >= size;
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} else {
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_errorMessage = data['message'] ?? _errorFetchFailed;
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|
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|
}
|
|
|
|
|
}
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|
|
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|
|
|
void _resetLoadingState() {
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|
|
|
|
loading = false;
|
|
|
|
|
_isLoadingMore = false;
|
|
|
|
|
notifyListeners();
|
|
|
|
|
}
|
|
|
|
|
}
|