cssd/lib/pages/PackagePages/package_update_screen.dart

import 'package:cssd/models/package_model.dart';
import 'package:cssd/providers/packages.dart';
import 'package:cssd/widgets/PackageScreens/Add/package_update_button.dart';
import 'package:flutter/material.dart';
import 'package:font_awesome_flutter/font_awesome_flutter.dart';
import 'package:provider/provider.dart';
import '../../config/routes.dart';
import '../../providers/connectivity.dart';
import '../../widgets/Global/internet_error.dart';

class PackageUpdateScreen extends StatefulWidget {
  @override
  _PackageUpdateScreenState createState() => _PackageUpdateScreenState();
}

class _PackageUpdateScreenState extends State<PackageUpdateScreen> {
  final _udiFocusNode = FocusNode();
  final _descriptionFocusNode = FocusNode();
  TextEditingController nameCTRL = new TextEditingController();
  TextEditingController udiCTRL = new TextEditingController();
  TextEditingController descriptionCTRL = new TextEditingController();
  TextEditingController itemCTRL = new TextEditingController();

  final _form = GlobalKey<FormState>();

  bool isEmpty = false;
  bool isInit = true;
  PackageDetailObject? datas;

  @override
  void didChangeDependencies() async {
    if (isInit) {
      var _id = ModalRoute.of(context)!.settings.arguments;
      await Provider.of<PackageProvider>(context, listen: false)
          .showPackageResult(_id.toString())
          .then(
        (result) {
          setState(
            () {
              datas = result;
              nameCTRL.text = datas!.name;
              udiCTRL.text = datas!.udi;
              descriptionCTRL.text = datas!.description;
              for (String item in datas!.items) {
                itemCTRL.text = item;
              }
            },
          );
        },
      );
      await Provider.of<PackageProvider>(context, listen: false)
          .getItemFilters()
          .then(
        (result) {
          setState(
            () {
              isInit = false;
            },
          );
        },
      );
    }
    super.didChangeDependencies();
  }

  @override
  Widget build(BuildContext context) {
    final _media = MediaQuery.of(context);
    final double _devicewidth = _media.size.width;
    final double _deviceBlockSize = _devicewidth / 100;
    return WillPopScope(
      onWillPop: () async {
        Navigator.pushReplacementNamed(
          context,
          Routes.packageResultScreen,
        );
        return true;
      },
      child: SafeArea(
        child: Scaffold(
          appBar: AppBar(
            titleSpacing: -10,
            backgroundColor: Colors.black,
            title: Text('Packages'),
            leading: IconButton(
              icon: Icon(
                Icons.keyboard_arrow_left,
                size: 35,
              ),
              onPressed: () => Navigator.of(context)
                  .pushReplacementNamed(Routes.packageResultScreen),
            ),
          ),
          body: Consumer<ConnectivityProvider>(
            builder: (ct, connection, _) {
              return connection.conStatus != 'offline'
                  ? isInit
                      ? Center(
                          child: CircularProgressIndicator(color: Colors.black),
                        )
                      : Form(
                          key: _form,
                          child: Padding(
                            padding: EdgeInsets.all(20),
                            child: ListView(
                              children: <Widget>[
                                Text(
                                  'Update a Package',
                                  style: TextStyle(
                                    fontWeight: FontWeight.w700,
                                    fontSize: 6 * _deviceBlockSize,
                                    letterSpacing: 3,
                                  ),
                                ),
                                SizedBox(
                                  height: 20,
                                ),
                                TextFormField(
                                  validator: (val) {
                                    if (val!.isEmpty) {
                                      return 'Name required!';
                                    }
                                    return null;
                                  },
                                  controller: nameCTRL,
                                  decoration: InputDecoration(
                                    icon: Icon(FontAwesomeIcons.alignLeft,
                                        size: 7 * _deviceBlockSize),
                                    isDense: true,
                                    labelText: 'Package Name',
                                    contentPadding: EdgeInsets.symmetric(
                                        vertical: 2, horizontal: 3),
                                    labelStyle: TextStyle(
                                      fontWeight: FontWeight.w100,
                                      fontSize: 4 * _deviceBlockSize,
                                    ),
                                  ),
                                  style: TextStyle(
                                    fontWeight: FontWeight.w700,
                                    fontSize: 5 * _deviceBlockSize,
                                  ),
                                  keyboardType: TextInputType.text,
                                  textInputAction: TextInputAction.next,
                                  onFieldSubmitted: (_) {
                                    FocusScope.of(context)
                                        .requestFocus(_udiFocusNode);
                                  },
                                ),
                                SizedBox(
                                  height: 20,
                                ),
                                TextFormField(
                                  validator: (val) {
                                    if (val!.isEmpty) {
                                      return 'UDI required!';
                                    }
                                    return null;
                                  },
                                  controller: udiCTRL,
                                  decoration: InputDecoration(
                                    icon: Icon(
                                      FontAwesomeIcons.alignLeft,
                                      size: 7 * _deviceBlockSize,
                                    ),
                                    labelStyle: TextStyle(
                                      fontWeight: FontWeight.w100,
                                      fontSize: 4 * _deviceBlockSize,
                                    ),
                                    isDense: true,
                                    labelText: 'UDI',
                                    contentPadding: EdgeInsets.symmetric(
                                        vertical: 2, horizontal: 3),
                                  ),
                                  style: TextStyle(
                                    fontWeight: FontWeight.w700,
                                    fontSize: 5 * _deviceBlockSize,
                                  ),
                                  focusNode: _udiFocusNode,
                                  keyboardType: TextInputType.text,
                                  textInputAction: TextInputAction.done,
                                  onFieldSubmitted: (_) {
                                    FocusScope.of(context)
                                        .requestFocus(_descriptionFocusNode);
                                  },
                                ),
                                SizedBox(
                                  height: 20,
                                ),
                                TextFormField(
                                  controller: descriptionCTRL,
                                  decoration: InputDecoration(
                                    icon: Icon(
                                      FontAwesomeIcons.alignLeft,
                                      size: 7 * _deviceBlockSize,
                                    ),
                                    labelStyle: TextStyle(
                                      fontWeight: FontWeight.w100,
                                      fontSize: 4 * _deviceBlockSize,
                                    ),
                                    isDense: true,
                                    labelText: 'Description',
                                    contentPadding: EdgeInsets.symmetric(
                                        vertical: 2, horizontal: 3),
                                  ),
                                  style: TextStyle(
                                    fontWeight: FontWeight.w700,
                                    fontSize: 5 * _deviceBlockSize,
                                  ),
                                  keyboardType: TextInputType.multiline,
                                  focusNode: _descriptionFocusNode,
                                  minLines: 1,
                                  maxLines: 5,
                                ),
                                SizedBox(
                                  height: 70,
                                ),
                                PackageUpdateButton(
                                  form: _form,
                                  id: datas!.id,
                                  nameCTRL: nameCTRL,
                                  udiCTRL: udiCTRL,
                                  itemCTRL: itemCTRL,
                                  deviceBlockSize: _deviceBlockSize,
                                  descriptionCTRL: descriptionCTRL,
                                ),
                                SizedBox(
                                  height: 100,
                                ),
                              ],
                            ),
                          ),
                        )
                  : ConnectionErrorBox();
            },
          ),
        ),
      ),
    );
  }
}