Teso_Mobile/lib/Pages/scannerqr.dart

import 'dart:convert';
import 'package:teso/util/consts.dart';
import 'package:flutter/material.dart';
import 'package:http/http.dart' as http;
import 'package:teso/Classes/API Clasess/CouponDetails.dart';
import 'package:shared_preferences/shared_preferences.dart';
import 'package:flutter/cupertino.dart';
import 'package:teso/Pages/PageWidgets/WalkIn Coupons/ActiveDiscount.dart';
import 'package:teso/Pages/PageWidgets/WalkIn Coupons/ActiveFreebie.dart';

class ScanQR extends StatefulWidget {
  final String shopID;
  const ScanQR({Key key, this.shopID}) : super(key: key);
  @override
  _ScanQRState createState() => _ScanQRState(shopID: this.shopID);
}

class _ScanQRState extends State<ScanQR> with TickerProviderStateMixin {
  String shopID;
  _ScanQRState({this.shopID});

  int flag = 0;
  var _future;
  List<CouponDetails> data;
  List<CouponDetails> selectedData = [];
  double selectedDiscount = 0;

  void initState() {
    super.initState();
    _future = getShopsCoupons();
  }

  @override
  void dispose() {
    super.dispose();
  }

  Future<List<CouponDetails>> getShopsCoupons() async {
    SharedPreferences prefs = await SharedPreferences.getInstance();

    Map<String, String> requestHeaders = {
      'Content-type': 'application/json',
      'Authorization': prefs.getString('tokensTeso')
    };
    var register2 = serverLocation + 'coupons/qrCoupon';
    var client1 = await http.post(Uri.parse(register2),
        body: json.encode(shopID), headers: requestHeaders);

    if (client1.statusCode == 200) {
      try {
        var details = jsonDecode(client1.body);
        data = List<CouponDetails>.from(
            details.map((model) => CouponDetails.fromJSON(model)).toList());
        return data;
      } catch (e) {
        print(e);
        return null;
      }
    } else {
      return null;
    }
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text("Redeem Coupon"),
      ),
      body: FutureBuilder(
        future: _future,
        builder: (context, snapshot) {
          if (snapshot.data == null &&
              snapshot.connectionState == ConnectionState.waiting) {
            return Center(
              child: CupertinoActivityIndicator(
                animating: true,
                radius: 15,
              ),
            );
          } else if ((data == null || data.length == 0) &&
              snapshot.connectionState == ConnectionState.done) {
            return Center(
              child: Text(
                  "Sorry you do not have any coupon from this shop to redeem"),
            );
          } else {
            return ListView.builder(
              scrollDirection: Axis.horizontal,
              itemCount: data.length,
              itemBuilder: (context, index) {
                if (data.elementAt(index).type.contains("FREEBIE")) {
                  return buildActiveFreebieCoupon(
                      data.elementAt(index), 0, context);
                } else {
                  return buildActiveDiscountCoupon(
                      data.elementAt(index), 0, context);
                }
              },
            );
          }
        },
      ),
    );
  }
}