elcaribe/source_code/lib/screens/payments/paypal_screen.dart

import 'package:active_ecommerce_seller_app/custom/toast_component.dart';
import 'package:active_ecommerce_seller_app/helpers/shared_value_helper.dart';
import 'package:active_ecommerce_seller_app/my_theme.dart';
import 'package:active_ecommerce_seller_app/repositories/payment_repository.dart';
import 'package:flutter/material.dart';

import 'package:toast/toast.dart';
import 'dart:convert';
import 'package:webview_flutter/webview_flutter.dart';
import 'package:flutter_gen/gen_l10n/app_localizations.dart';


class PaypalScreen extends StatefulWidget {
  double amount;
  String payment_type;
  String? payment_method_key;
  String? package_id;

  PaypalScreen(
      {Key? key,
      this.amount = 0.00,
      this.payment_type = "",
      this.payment_method_key = "",this.package_id})
      : super(key: key);

  @override
  _PaypalScreenState createState() => _PaypalScreenState();
}

class _PaypalScreenState extends State<PaypalScreen> {
  int _combined_order_id = 0;
  bool _order_init = false;
  String? _initial_url = "";
  bool _initial_url_fetched = false;

  late WebViewController _webViewController;

  @override
  void initState() {
    // TODO: implement initState
    super.initState();
    _webViewController = WebViewController()
      ..setJavaScriptMode(JavaScriptMode.unrestricted)
      ..setNavigationDelegate(
        NavigationDelegate(
          onPageFinished: (page) {
            //print(page.toString());

            if (page.contains("/paypal/payment/done")) {
              getData();
            } else if (page.contains("/paypal/payment/cancel")) {
              ToastComponent.showDialog("Payment cancelled",
                  gravity: Toast.center, duration: Toast.lengthLong);
              Navigator.of(context).pop();
              return;
            }
          },
        ),
      );
      // on cart payment need proper order id
      getSetInitialUrl();

  }


  getSetInitialUrl() async {
    var paypalUrlResponse = await PaymentRepository().getPaypalUrlResponse(
        widget.payment_type, _combined_order_id,widget.package_id ,widget.amount);

    if (paypalUrlResponse.result == false) {
      ToastComponent.showDialog(paypalUrlResponse.message!,
          gravity: Toast.center, duration: Toast.lengthLong);
      Navigator.of(context).pop();
      return;
    }

    _initial_url = paypalUrlResponse.url;
    _initial_url_fetched = true;

    _webViewController.loadRequest(Uri.parse(_initial_url!));

    setState(() {});
  }

  @override
  Widget build(BuildContext context) {
    return Directionality(
      textDirection: app_language_rtl.$! ? TextDirection.rtl : TextDirection.ltr,
      child: Scaffold(
        backgroundColor: Colors.white,
        appBar: buildAppBar(context),
        body: buildBody(),
      ),
    );
  }

  void getData() {
    _webViewController
        .runJavaScriptReturningResult("document.body.innerText")
        .then((data) {
      var responseJSON = jsonDecode(data as String);
      if(responseJSON.runtimeType ==String ){
        responseJSON = jsonDecode(responseJSON);
      }
      //print(data.toString());
        ToastComponent.showDialog(responseJSON["message"],
            duration: Toast.lengthLong, gravity: Toast.center);
        Navigator.pop(context);

    });
  }

  buildBody() {
     if (_initial_url_fetched == false) {
      return Container(
        child: Center(
          child: Text(AppLocalizations.of(context)!.fetching_paypal_url),
        ),
      );
    } else {
      return SingleChildScrollView(
        child: Container(
          width: MediaQuery.of(context).size.width,
          height: MediaQuery.of(context).size.height,
          child: WebViewWidget(

            controller: _webViewController,
          ),
        ),
      );
    }
  }

  AppBar buildAppBar(BuildContext context) {
    return AppBar(
backgroundColor: Colors.white,
      centerTitle: true,
      leading: Builder(
        builder: (context) => IconButton(
          icon: Icon(Icons.arrow_back, color: MyTheme.dark_grey),
          onPressed: () => Navigator.of(context).pop(),
        ),
      ),
      title: Text(
          AppLocalizations.of(context)!.pay_with_paypal,
        style: TextStyle(fontSize: 16, color: MyTheme.app_accent_color),
      ),
      elevation: 0.0,
      titleSpacing: 0,
    );
  }
}