Initial commit: Penyerahan final Source code Tugas Akhir

lib/providers/stream_invoice_provider.dart

@@ -0,0 +1,61 @@
+import 'dart:async';
+
+import 'package:flutter/material.dart';
+import 'package:initial_folder/models/detail_invoice_model.dart';
+import 'package:initial_folder/services/detail_invoice_service.dart';
+import 'package:provider/provider.dart';
+
+enum ResultState { loading, noData, hasData, error }
+
+class StreamInvoiceProvider extends ChangeNotifier {
+  final DetailInvoiceService _detailInvoiceService = DetailInvoiceService();
+  List<DataDetailInvoiceModel>? _detailInvoice;
+  String? _message;
+  String? _thumbnail;
+  ResultState? _state;
+  final StreamController<String> _transactionStatusController =
+      StreamController<String>.broadcast();
+
+  Stream<String> get transactionStatusStream =>
+      _transactionStatusController.stream;
+  String? get message => _message;
+  String? get thumbnail => _thumbnail;
+  List<DataDetailInvoiceModel>? get detailInvoice => _detailInvoice;
+  ResultState? get state => _state;
+
+  set selectedThumbnail(String? value) {
+    _thumbnail = value;
+    notifyListeners();
+  }
+
+  Future<void> fetchDetailInvoice(String? orderId) async {
+    print("Fetching detail invoice for order ID: $orderId");
+    try {
+      _state = ResultState.loading;
+      notifyListeners();
+      final data = await _detailInvoiceService.detailInvoice(orderId);
+      if (data.isEmpty) {
+        _state = ResultState.noData;
+        _message = 'Invoice Detail is Empty';
+        print("Invoice detail is empty");
+      } else {
+        _state = ResultState.hasData;
+        _detailInvoice = data;
+        print(
+            "Invoice detail fetched, updating transaction status to: ${data[0].transactionStatus}");
+        _transactionStatusController.sink.add(data[0].transactionStatus!);
+      }
+    } catch (e) {
+      _state = ResultState.error;
+      _message = 'Error -> $e';
+      print("Error fetching invoice detail: $e");
+    }
+    notifyListeners();
+  }
+
+  @override
+  void dispose() {
+    _transactionStatusController.close();
+    super.dispose();
+  }
+}