multiple payout page and small fixes

frontend/pshared/lib/provider/payment/multiple/quotation.dart

@@ -1,3 +1,5 @@
+import 'dart:async';
+
 import 'package:flutter/foundation.dart';
 
 import 'package:uuid/uuid.dart';
@@ -17,11 +19,13 @@ class MultiQuotationProvider extends ChangeNotifier {
   String? _loadedOrganizationRef;
 
   Resource<PaymentQuotes> _quotation = Resource(data: null);
-  bool _isLoaded = false;
 
   List<PaymentIntent>? _lastIntents;
   bool _lastPreviewOnly = false;
   Map<String, String>? _lastMetadata;
+  Timer? _autoRefreshTimer;
+
+  static const Duration _autoRefreshLead = Duration(seconds: 5);
 
   Resource<PaymentQuotes> get resource => _quotation;
   PaymentQuotes? get quotation => _quotation.data;
@@ -29,7 +33,7 @@ class MultiQuotationProvider extends ChangeNotifier {
   Exception? get error => _quotation.error;
   bool get canRefresh => _lastIntents != null && _lastIntents!.isNotEmpty;
   bool get isReady =>
-      _isLoaded && !_quotation.isLoading && _quotation.error == null;
+      quotation != null && !_quotation.isLoading && _quotation.error == null;
 
   DateTime? get quoteExpiresAt {
     final quotes = quotation?.quotes;
@@ -82,6 +86,7 @@ class MultiQuotationProvider extends ChangeNotifier {
         ? null
         : Map<String, String>.from(metadata);
 
+    _cancelAutoRefresh();
     _setResource(_quotation.copyWith(isLoading: true, error: null));
     try {
       final response = await MultiplePaymentsService.getQuotation(
@@ -94,10 +99,10 @@ class MultiQuotationProvider extends ChangeNotifier {
         ),
       );
 
-      _isLoaded = true;
       _setResource(
         _quotation.copyWith(data: response, isLoading: false, error: null),
       );
+      _scheduleAutoRefresh();
     } catch (e) {
       _setResource(
         _quotation.copyWith(
@@ -123,10 +128,10 @@ class MultiQuotationProvider extends ChangeNotifier {
   }
 
   void reset() {
-    _isLoaded = false;
     _lastIntents = null;
     _lastPreviewOnly = false;
     _lastMetadata = null;
+    _cancelAutoRefresh();
     _quotation = Resource(data: null);
     notifyListeners();
   }
@@ -135,4 +140,37 @@ class MultiQuotationProvider extends ChangeNotifier {
     _quotation = quotation;
     notifyListeners();
   }
+
+  void _scheduleAutoRefresh() {
+    _autoRefreshTimer?.cancel();
+    final expiresAt = quoteExpiresAt;
+    if (expiresAt == null) return;
+
+    final now = DateTime.now().toUtc();
+    var delay = expiresAt.difference(now) - _autoRefreshLead;
+    if (delay.isNegative) delay = Duration.zero;
+    _autoRefreshTimer = Timer(delay, _triggerAutoRefresh);
+  }
+
+  Future<void> _triggerAutoRefresh() async {
+    if (_quotation.isLoading) return;
+    final intents = _lastIntents;
+    if (intents == null || intents.isEmpty) return;
+    await quotePayments(
+      intents,
+      previewOnly: _lastPreviewOnly,
+      metadata: _lastMetadata,
+    );
+  }
+
+  void _cancelAutoRefresh() {
+    _autoRefreshTimer?.cancel();
+    _autoRefreshTimer = null;
+  }
+
+  @override
+  void dispose() {
+    _cancelAutoRefresh();
+    super.dispose();
+  }
 }