fcs/lib/pages/rates/discount_by_weight_editor.dart

import 'package:fcs/domain/entities/discount_by_weight.dart';
import 'package:fcs/helpers/theme.dart';
import 'package:fcs/pages/main/util.dart';
import 'package:fcs/pages/rates/model/shipment_rate_model.dart';
import 'package:fcs/pages/widgets/input_text.dart';
import 'package:fcs/pages/widgets/local_app_bar.dart';
import 'package:fcs/pages/widgets/progress.dart';
import 'package:flutter/material.dart';
import 'package:font_awesome_flutter/font_awesome_flutter.dart';
import 'package:provider/provider.dart';

class DiscountByWeightEditor extends StatefulWidget {
  final DiscountByWeight? discountByWeight;
  DiscountByWeightEditor({this.discountByWeight});

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

class _DiscountByWeightEditorState extends State<DiscountByWeightEditor> {
  TextEditingController _weightController = new TextEditingController();
  TextEditingController _discountController = new TextEditingController();

  bool _isLoading = false;
  bool _isNew = false;
  DiscountByWeight _discountByWeight = new DiscountByWeight();
  final _discountFormKey = GlobalKey<FormState>();

  @override
  void initState() {
    super.initState();
    if (widget.discountByWeight != null) {
      _discountByWeight = widget.discountByWeight!;
      _weightController.text = _discountByWeight.weight.toStringAsFixed(2);
      _discountController.text = _discountByWeight.discount.toString();
      _isNew = false;
    } else {
      _isNew = true;
    }
  }

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

  @override
  Widget build(BuildContext context) {
    final weightBox = InputText(
      labelTextKey: 'rate.discount.weight',
      iconData: FontAwesomeIcons.weightHanging,
      controller: _weightController,
      autovalidateMode: AutovalidateMode.onUserInteraction,
      validator: (value) {
        if (value == null || value.isEmpty) {
          return "Please inset weight";
        }
        return null;
      },
    );
    final discountRateBox = InputText(
      labelTextKey: 'rate.discount.rate',
      iconData: Icons.attach_money,
      controller: _discountController,
      autovalidateMode: AutovalidateMode.onUserInteraction,
      validator: (value) {
        if (value == null || value.isEmpty) {
          return "Please insert discount rate";
        }
        return null;
      },
    );

    return LocalProgress(
      inAsyncCall: _isLoading,
      child: Scaffold(
        appBar: LocalAppBar(
          labelKey: 'discount.new',
          backgroundColor: Colors.white,
          labelColor: primaryColor,
          arrowColor: primaryColor,
          onBack: () {
            if (isDataChanged()) {
              showConfirmDialog(context, "back.button_confirm", () {
                Navigator.of(context).pop();
              });
            } else {
              Navigator.of(context).pop();
            }
          },
          actions: [
            _isNew
                ? Container()
                : IconButton(
                    icon: Icon(Icons.delete, color: primaryColor),
                    onPressed: _delete,
                  )
          ],
        ),
        body: Form(
          key: _discountFormKey,
          child: Container(
            padding: EdgeInsets.all(18),
            child: Column(
              children: <Widget>[
                Expanded(
                  child: ListView(
                    children: <Widget>[
                      weightBox,
                      discountRateBox,
                      SizedBox(height: 30),
                    ],
                  ),
                ),
                fcsButton(context, getLocalString(context, "btn.save"),
                    callack: _save),
                SizedBox(height: 10)
              ],
            ),
          ),
        ),
      ),
    );
  }

  _save() async {
    if (!_discountFormKey.currentState!.validate()) {
      return;
    }

    setState(() {
      _isLoading = true;
    });
    try {
      var shipmentRateModel =
          Provider.of<ShipmentRateModel>(context, listen: false);
      DiscountByWeight _discount = DiscountByWeight(
          weight: double.parse(_weightController.text),
          discount: double.parse(_discountController.text));
      if (_isNew) {
        await shipmentRateModel.addDiscountByWeight(_discount);
      } else {
        _discount.id = this._discountByWeight.id;
        await shipmentRateModel.updateDiscountByWeight(_discount);
      }
      Navigator.pop(context);
    } catch (e) {
      showMsgDialog(context, "Error", e.toString());
    } finally {
      setState(() {
        _isLoading = false;
      });
    }
  }

  _delete() {
    showConfirmDialog(context, "rate.discount_by_weight.edit.delete.confirm",
        _deleteDiscountByWeight);
  }

  _deleteDiscountByWeight() async {
    setState(() {
      _isLoading = true;
    });
    try {
      var shipmentRateModel =
          Provider.of<ShipmentRateModel>(context, listen: false);
      await shipmentRateModel
          .deleteDiscountByWeight(this._discountByWeight.id!);
      Navigator.pop(context);
    } catch (e) {
      showMsgDialog(context, "Error", e.toString());
    } finally {
      setState(() {
        _isLoading = false;
      });
    }
  }

  isDataChanged() {
    if (_isNew) {
      return _weightController.text != "" || _discountController.text != "";
    } else {
      DiscountByWeight _discount = DiscountByWeight(
          weight: double.parse(_weightController.text),
          discount: double.parse(_discountController.text));
      return this._discountByWeight.isChangedForEdit(_discount);
    }
  }
}