small fixes for single payout and big chunck for multiple payouts

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

@@ -0,0 +1,81 @@
+import 'package:flutter/foundation.dart';
+
+import 'package:pshared/models/payment/payment.dart';
+import 'package:pshared/provider/organizations.dart';
+import 'package:pshared/provider/payment/multiple/quotation.dart';
+import 'package:pshared/provider/resource.dart';
+import 'package:pshared/service/payment/multiple.dart';
+import 'package:pshared/utils/exception.dart';
+
+
+class MultiPaymentProvider extends ChangeNotifier {
+  late OrganizationsProvider _organization;
+  late MultiQuotationProvider _quotation;
+
+  Resource<List<Payment>> _payments = Resource(data: []);
+  bool _isLoaded = false;
+
+  List<Payment> get payments => _payments.data ?? [];
+  bool get isLoading => _payments.isLoading;
+  Exception? get error => _payments.error;
+  bool get isReady =>
+      _isLoaded && !_payments.isLoading && _payments.error == null;
+
+  void update(
+    OrganizationsProvider organization,
+    MultiQuotationProvider quotation,
+  ) {
+    _organization = organization;
+    _quotation = quotation;
+  }
+
+  Future<List<Payment>> pay({
+    String? idempotencyKey,
+    Map<String, String>? metadata,
+  }) async {
+    if (!_organization.isOrganizationSet) {
+      throw StateError('Organization is not set');
+    }
+
+    final quoteRef = _quotation.quotation?.quoteRef;
+    if (quoteRef == null || quoteRef.isEmpty) {
+      throw StateError('Multiple quotation reference is not set');
+    }
+
+    final expiresAt = _quotation.quoteExpiresAt;
+    if (expiresAt != null && expiresAt.isBefore(DateTime.now().toUtc())) {
+      throw StateError('Multiple quotation is expired');
+    }
+
+    _setResource(_payments.copyWith(isLoading: true, error: null));
+    try {
+      final response = await MultiplePaymentsService.payByQuote(
+        _organization.current.id,
+        quoteRef,
+        idempotencyKey: idempotencyKey,
+        metadata: metadata,
+      );
+
+      _isLoaded = true;
+      _setResource(
+        _payments.copyWith(data: response, isLoading: false, error: null),
+      );
+    } catch (e) {
+      _setResource(
+        _payments.copyWith(data: [], isLoading: false, error: toException(e)),
+      );
+    }
+
+    return _payments.data ?? [];
+  }
+
+  void reset() {
+    _isLoaded = false;
+    _setResource(Resource(data: []));
+  }
+
+  void _setResource(Resource<List<Payment>> payments) {
+    _payments = payments;
+    notifyListeners();
+  }
+}