flutter_hyperswitch 1.1.4

Flutter Hyperswitch: Simplifying payment integration for Flutter apps with seamless API interactions and customizable UI.

example/lib/main.dart

import 'dart:convert';
import 'dart:io';
import 'package:flutter/material.dart' hide Card;
import 'package:flutter/material.dart' as material;
import 'package:flutter_hyperswitch/flutter_hyperswitch.dart';
import 'package:http/http.dart' as http;

void main() {
  runApp(const MyApp());
}

class MyApp extends StatefulWidget {
  const MyApp({super.key});

  @override
  State<MyApp> createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  final String _endpoint =
      Platform.isAndroid ? "http://10.0.2.2:5252" : "http://localhost:5252";
  final _hyper = FlutterHyperswitch();

  Session? _sessionId;
  SavedSession? _savedSessionId;

  String _statusText = '';
  String _defaultPaymentMethodText = '';
  String _confirmStatusText = '';

  bool _isInitialized = false;
  bool _showChangeButton = false;
  int _confirmState = 0;

  @override
  void initState() {
    super.initState();
    _initPlatformState();
  }

  Future<void> _initPlatformState() async {
    final response =
        await http.get(Uri.parse("$_endpoint/create-payment-intent"));
    if (response.statusCode == 200) {
      final responseBody = jsonDecode(response.body) as Map<String, dynamic>;
      _hyper.init(HyperConfig(publishableKey: responseBody['publishableKey']));
      try {
        _sessionId = await _hyper.initPaymentSession(PaymentMethodParams(
            clientSecret: responseBody['clientSecret'],
            configuration: Configuration(
                appearance: Appearance(
                    font: Font(family: "montserrat_regular"),
                    shapes: Shapes(
                        shadow: Shadow(color: "#00000050", intensity: 5)),
                    primaryButton: PrimaryButton(
                        shapes: Shapes(
                            shadow:
                                Shadow(color: "#000000", intensity: 2)))))));
      } catch (ex) {
        print((ex as HyperswitchException).message);
      }
      setState(() {
        _isInitialized = _sessionId != null;
        _statusText =
            _isInitialized ? _statusText : "initPaymentSession failed";
      });
    } else {
      setState(() {
        _statusText = "API Call Failed";
      });
    }
  }

  Future<void> _initializeHeadless() async {
    if (_sessionId == null) {
      setState(() {
        _defaultPaymentMethodText = "SessionId is empty";
        _statusText = "";
      });
      return;
    }
    try {
      _savedSessionId =
          await _hyper.getCustomerSavedPaymentMethods(_sessionId!);
      final paymentMethod = await _hyper
          .getCustomerDefaultSavedPaymentMethodData(_savedSessionId!);
      if (paymentMethod is PaymentMethod) {
        if (paymentMethod is Card) {
          final card = paymentMethod;
          _setDefaultPaymentMethodText(
              "${card.nickName}  ${card.cardNumber}  ${card.expiryDate}", true);
          _showChangeButton = true;
        } else if (paymentMethod is Wallet) {
          final wallet = paymentMethod;
          _setDefaultPaymentMethodText(wallet.walletType, true);
        }
      } else if (paymentMethod is PaymentMethodError) {
        _setDefaultPaymentMethodText(paymentMethod.message, false);
      } else {
        _setDefaultPaymentMethodText(
            "getCustomerDefaultSavedPaymentMethodData failed", false);
      }
    } catch (error) {
      _handleError(error, 1);
    }
  }

  Future<void> _confirmPayment() async {
    setState(() {
      _confirmState = 1;
    });
    try {
      if (_savedSessionId != null) {
        final confirmWithCustomerDefaultPaymentMethodResponse = await _hyper
            .confirmWithCustomerDefaultPaymentMethod(_savedSessionId!);
        final message = confirmWithCustomerDefaultPaymentMethodResponse.message;
        if (message != null) {
          _setConfirmStatusText(
              "${confirmWithCustomerDefaultPaymentMethodResponse.status.name}\n${message.name}");
        } else {
          _setConfirmStatusText(
              "${confirmWithCustomerDefaultPaymentMethodResponse.status.name}\n${confirmWithCustomerDefaultPaymentMethodResponse.error.message}");
        }
      } else {
        _setConfirmStatusText("SavedSession is empty");
      }
    } catch (error) {
      _handleError(error, 2);
    } finally {
      setState(() {
        _showChangeButton = false;
        _defaultPaymentMethodText = '';
        _confirmState = 0;
        _initPlatformState();
      });
    }
  }

  Future<void> _presentPaymentSheet(bool isHeadless) async {
    if (_sessionId == null) {
      _setStatusText("SessionId is empty");
      return;
    }
    try {
      final presentPaymentSheetResponse =
          await _hyper.presentPaymentSheet(_sessionId!);
      if (isHeadless) {
        _setConfirmStatusText(_buildMessage(
            presentPaymentSheetResponse.status.name,
            presentPaymentSheetResponse.message,
            presentPaymentSheetResponse.error.message));
      } else {
        _setStatusText(_buildMessage(
            presentPaymentSheetResponse.status.name,
            presentPaymentSheetResponse.message,
            presentPaymentSheetResponse.error.message));
      }
      if (presentPaymentSheetResponse.status != Status.cancelled) {
        setState(() {
          _showChangeButton = false;
          _defaultPaymentMethodText = '';
          _confirmState = 0;
          _initPlatformState();
        });
      }
    } catch (error) {
      _handleError(error, 0);
    }
  }

  String _buildMessage(String status, Result? message, String error) {
    if (message != null) {
      return "$status\n${message.name}";
    } else {
      return "$status\n$error";
    }
  }

  void _handleError(dynamic error, int flow) {
    final errorMessage =
        error is HyperswitchException ? error.message : error.toString();
    if (flow == 0) {
      _setStatusText(errorMessage);
    } else if (flow == 1) {
      _setDefaultPaymentMethodText(errorMessage, false);
    } else if (flow == 2) {
      _setConfirmStatusText(errorMessage);
    }
  }

  void _setStatusText(String text) {
    setState(() {
      _statusText = text;
    });
  }

  void _setDefaultPaymentMethodText(String text, bool show) {
    setState(() {
      _defaultPaymentMethodText = text;
      _confirmStatusText = '';
      if (show) {
        _confirmState = 2;
      }
    });
  }

  void _setConfirmStatusText(String text) {
    setState(() {
      _confirmStatusText = text;
    });
  }

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      theme: ThemeData(fontFamily: 'montserrat'),
      home: Scaffold(
        appBar: AppBar(
          title: const Text('Plugin example app'),
        ),
        body: Column(
          children: [
            _buildHeadlessSdkExample(),
            _buildPaymentSheetExample(),
          ],
        ),
      ),
    );
  }

  Widget _buildHeadlessSdkExample() {
    return Expanded(
        child: material.Card(
            elevation: 4,
            margin: const EdgeInsets.all(18),
            child: Padding(
                padding: const EdgeInsets.all(36),
                child: Column(
                    mainAxisAlignment: MainAxisAlignment.spaceBetween,
                    crossAxisAlignment: CrossAxisAlignment.center,
                    children: [
                      const Center(
                          child: Text("Headless SDK Example",
                              style: TextStyle(
                                  fontSize: 16, fontWeight: FontWeight.w500))),
                      Center(
                          child: ElevatedButton(
                              onPressed:
                                  _isInitialized ? _initializeHeadless : null,
                              child: Text(_isInitialized
                                  ? "Initialize Headless"
                                  : "Loading ..."))),
                      Row(
                          mainAxisAlignment: MainAxisAlignment.center,
                          children: [
                            Flexible(child: Text(_defaultPaymentMethodText)),
                            if (_showChangeButton)
                              TextButton(
                                  onPressed: () {
                                    _presentPaymentSheet(true);
                                  },
                                  child: const Text("Change"))
                          ]),
                      if (_confirmState > 0)
                        Center(
                            child: ElevatedButton(
                                onPressed:
                                    _confirmState == 2 ? _confirmPayment : null,
                                child: Text(_confirmState == 1
                                    ? "Processing ..."
                                    : "Confirm Payment"))),
                      if (_confirmStatusText.isNotEmpty)
                        Center(child: Text(_confirmStatusText))
                    ]))));
  }

  Widget _buildPaymentSheetExample() {
    return Expanded(
        child: material.Card(
            elevation: 4,
            margin: const EdgeInsets.only(left: 18, right: 18, bottom: 18),
            child: Padding(
                padding: const EdgeInsets.all(36),
                child: Column(
                    mainAxisAlignment: MainAxisAlignment.spaceBetween,
                    crossAxisAlignment: CrossAxisAlignment.center,
                    children: [
                      const Center(
                          child: Text("Payment Sheet Example",
                              style: TextStyle(
                                  fontSize: 16, fontWeight: FontWeight.w500))),
                      Center(
                          child: ElevatedButton(
                              onPressed: _isInitialized
                                  ? () {
                                      _presentPaymentSheet(false);
                                    }
                                  : null,
                              child: Text(_isInitialized
                                  ? "Open Payment Sheet"
                                  : "Loading ..."))),
                      Center(child: Text(_statusText))
                    ]))));
  }
}