checker/lib/screens/purchase_success.dart

import 'package:checker/base/base_state.dart';
import 'package:checker/common.dart';
import 'package:checker/consts.dart';
import 'package:checker/db.dart';
import 'package:checker/strings.dart';
import 'package:flutter/material.dart';

/// Экран проведения покупки.
class PurchaseSuccessScreen extends StatefulWidget {

  PurchaseSuccessScreen(this.val, this.name, this.helper, this.app, this.details, this.coupons);

  final String val;
  final String name;
  final String app;
  final SqliteHelper helper;
  final Map details;
  final List<Map> coupons;

  @override State createState() =>
    new PurchaseSuccessScreenState(val, name, helper, app, details, coupons);
}

class PurchaseSuccessScreenState<T> extends BaseState<PurchaseSuccessScreen> {

  PurchaseSuccessScreenState(
    String sum, String username, SqliteHelper helper,
    String app, Map details, List<Map> coupons
  ){
    this.sum = sum;
    this.username = username;
    this.helper = helper;
    this.app = app;
    this.details = details;
    this.coupons = coupons;
  }

  String sum, username;
  Map details;
  List<Map> coupons;
  int bonusPlus = 0;
  int bonusMinus = 0;
  int currency;
  bool showBonus;
  String flavor;

  @override String getTitle() {
    return StringsLocalization.carryingPurchase();
  }

  @override String getHintString() {
    return null;
  }

  @override Widget build(BuildContext context) {
    if (currency == null) {
      helper.getCurrency().then((currency) {
        setState(() {
          this.currency = currency;
        });
      });
    }
    if (this.flavor == null) {
      platform.invokeMethod('getFlavor').then((flavor) {
        setState(() {
          this.flavor = flavor;

          if (this.details['sum_bonus'] is String) {
            String regexString = r'(\d+) начислено, (\d+).*';
            RegExp regExp = new RegExp(regexString);
            var matches = regExp.allMatches(this.details['sum_bonus']);
            if(matches.length != 0) {
              var match = matches.elementAt(0); // => extract the first (and only) match
              this.bonusPlus = int.parse(match.group(1));
              this.bonusMinus = int.parse(match.group(2));
            }
          }

          if (this.details['sum_bonus'] is int) {
            this.bonusPlus = this.details['sum_bonus'];
          }
        });
      });
    }

    return getMainWidget();
  }

  @override Widget getScreenContent() {

    List <Widget> widgetList = <Widget>[];
    widgetList.add(getValueWithDescription(StringsLocalization.buyer(), username));
    widgetList.add(getSuccessMessage());

    if (bonusPlus > 0) {
      widgetList.add(getValueWithDescription(StringsLocalization.bonusPlus(), bonusPlus.toString()));
    }
    if (bonusMinus > 0) {
      widgetList.add(getValueWithDescription(StringsLocalization.bonusMinus(), bonusMinus.toString()));
    }

    if (this.flavor != 'autobonus') {
      widgetList.add(getValueWithDescription(StringsLocalization.discountRate(), '${details['discount']}%'));
      widgetList.add(getValueWithDescription(StringsLocalization.discountSum(), '${details['sum_discount']}'));
    }

//    widgetList.add( new Expanded(child: new Center()));
    if (this.coupons.length > 0) {
      widgetList.add(getItemTitle(StringsLocalization.couponsUsed()));
      this.coupons.forEach((couponItem) {
        widgetList.add(getItemToggle(
          couponItem['offer_name'],
          couponItem['coupon_condition']
        ));
      });
    }

    widgetList.add(wrapButton(getScreenMargins(174.0), getScanButton()));

    return new ListView.builder(
      itemBuilder: (BuildContext context, int index) => widgetList[index],
      itemCount: widgetList.length
    );

  }

  getScreenMargins(double bottom) {
    double side = 42.0;
    return new EdgeInsets.only(bottom: bottom, left: side, right: side);
  }

  getScanButton() {
    String title = StringsLocalization.scan();
    return buildRaisedButton(title, () => startScanner(context, app, helper));
  }


  ExpansionPanelHeaderBuilder get headerBuilder {
    return (BuildContext context, bool isExpanded) {
      return new Text('Purchase details');
    };
  }



  getSuccessMessage() {
    return new Row(
      children: <Widget>[
        new Expanded(child: new Container(
          margin: new EdgeInsets.only(top: 20.0), height: 64.0,
          decoration: new BoxDecoration(color: greenBackground),
          child: new Center(
            child: new Text(
              getMessageTitle(), textAlign: TextAlign.center,
              style: new TextStyle(
                fontWeight: FontWeight.bold,
                color: tokenActiveTextColor
              )
            )
          )
        ))
      ]);
  }

  getMessageTitle() {
    if (currency != null) {
      return StringsLocalization.purchaseCompleted(sum, currency);
    } else {
      return '';
    }
  }

}