Quotation

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

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+import 'package:flutter/foundation.dart';
+
+import 'package:logging/logging.dart';
+import 'dart:convert';
+
+import 'package:uuid/uuid.dart';
+
+import 'package:pshared/api/requests/payment/quote.dart';
+import 'package:pshared/data/mapper/payment/intent/payment.dart';
+import 'package:pshared/models/asset.dart';
+import 'package:pshared/models/payment/intent.dart';
+import 'package:pshared/models/payment/quote/quote.dart';
+import 'package:pshared/models/payment/money.dart';
+import 'package:pshared/provider/organizations.dart';
+import 'package:pshared/provider/payment/amount.dart';
+import 'package:pshared/provider/payment/flow.dart';
+import 'package:pshared/provider/payment/wallets.dart';
+import 'package:pshared/provider/recipient/provider.dart';
+import 'package:pshared/provider/recipient/pmethods.dart';
+import 'package:pshared/provider/resource.dart';
+import 'package:pshared/provider/payment/quotation/intent_builder.dart';
+import 'package:pshared/service/payment/quotation.dart';
+import 'package:pshared/utils/exception.dart';
+
+
+class QuotationProvider extends ChangeNotifier {
+  static final _logger = Logger('provider.payment.quotation');
+  Resource<PaymentQuote> _quotation = Resource(data: null, isLoading: false, error: null);
+  late OrganizationsProvider _organizations;
+  bool _isLoaded = false;
+  PaymentIntent? _lastIntent;
+  final QuotationIntentBuilder _intentBuilder = QuotationIntentBuilder();
+
+  void update(
+    OrganizationsProvider venue, 
+    PaymentAmountProvider payment,
+    WalletsProvider wallets,
+    PaymentFlowProvider flow,
+    RecipientsProvider recipients,
+    PaymentMethodsProvider methods,
+  ) {
+    _organizations = venue;
+    final intent = _intentBuilder.build(
+      payment: payment,
+      wallets: wallets,
+      flow: flow,
+      recipients: recipients,
+      methods: methods,
+    );
+    if (intent == null) return;
+    final intentKey = _buildIntentKey(intent);
+    final lastIntent = _lastIntent;
+    if (lastIntent != null && intentKey == _buildIntentKey(lastIntent)) return;
+    getQuotation(intent, idempotencyKey: intentKey);
+  }
+
+  PaymentQuote? get quotation => _quotation.data;
+  bool get isLoading => _quotation.isLoading;
+  Exception? get error => _quotation.error;
+  bool get canRefresh => _lastIntent != null;
+  bool get isReady => _isLoaded && !_quotation.isLoading && _quotation.error == null;
+
+  DateTime? get quoteExpiresAt {
+    final expiresAtUnixMs = quotation?.fxQuote?.expiresAtUnixMs;
+    if (expiresAtUnixMs == null) return null;
+    return DateTime.fromMillisecondsSinceEpoch(expiresAtUnixMs, isUtc: true);
+  }
+
+
+  Asset? get fee => _assetFromMoney(quotation?.expectedFeeTotal);
+  Asset? get total => _assetFromMoney(quotation?.debitAmount);
+  Asset? get recipientGets => _assetFromMoney(quotation?.expectedSettlementAmount);
+
+  Asset? _assetFromMoney(Money? money) {
+    if (money == null) return null;
+    return createAsset(money.currency, money.amount);
+  }
+
+  void _setResource(Resource<PaymentQuote> quotation) {
+    _quotation = quotation;
+    notifyListeners();
+  }
+
+  Future<PaymentQuote?> refreshQuotation() async {
+    final intent = _lastIntent;
+    if (intent == null) return null;
+    return getQuotation(intent, idempotencyKey: _buildIntentKey(intent));
+  }
+
+  Future<PaymentQuote?> getQuotation(PaymentIntent intent, {String? idempotencyKey}) async {
+    if (!_organizations.isOrganizationSet) throw StateError('Organization is not set');
+    _lastIntent = intent;
+    final intentKey = idempotencyKey ?? _buildIntentKey(intent);
+    try {
+      _setResource(_quotation.copyWith(isLoading: true, error: null));
+      final response = await QuotationService.getQuotation(
+        _organizations.current.id, 
+        QuotePaymentRequest(
+          idempotencyKey: intentKey,
+          intent: intent.toDTO(),
+        ),
+      );
+      _isLoaded = true;
+      _setResource(_quotation.copyWith(data: response, isLoading: false, error: null));
+    } catch (e, st) {
+      _logger.warning('Failed to get quotation', e, st);
+      _setResource(_quotation.copyWith(
+        data: null,
+        error: toException(e),
+        isLoading: false,
+      ));
+    }
+    return _quotation.data;
+  }
+
+  void reset() {
+    _isLoaded = false;
+    _lastIntent = null;
+    _setResource(Resource(data: null, isLoading: false, error: null));
+  }
+
+  String _buildIntentKey(PaymentIntent intent) {
+    final payload = jsonEncode(intent.toDTO().toJson());
+    return Uuid().v5(Namespace.url.value, 'quote:$payload');
+  }
+}