fcs/lib/pages/storage/storage_addition.dart

import 'package:flutter/material.dart';
import 'package:provider/provider.dart';
import 'package:fcs/model/language_model.dart';
import 'package:fcs/model/storage_model.dart';
import 'package:fcs/pages/util.dart';
import 'package:fcs/theme/theme.dart';
import 'package:fcs/vo/storage.dart';
import 'package:fcs/widget/local_text.dart';
import 'package:fcs/widget/localization/app_translations.dart';
import 'package:fcs/widget/progress.dart';

class StorageAddition extends StatefulWidget {
  final Storage storage;

  const StorageAddition({Key key, this.storage}) : super(key: key);
  @override
  _StorageAdditionState createState() => _StorageAdditionState();
}

class _StorageAdditionState extends State<StorageAddition> {
  final _formKey = GlobalKey<FormState>();
  TextEditingController nameController = new TextEditingController();
  bool _isLoading = false;

  @override
  void initState() {
    super.initState();
    if (widget.storage != null) {
      nameController.text = widget.storage.name;
    }
  }

  @override
  Widget build(BuildContext context) {
    var languageModel = Provider.of<LanguageModel>(context);

    return LocalProgress(
      inAsyncCall: _isLoading,
      child: Scaffold(
          appBar: AppBar(
            backgroundColor: primaryColor,
            title: LocalText(context, "storage.item.title",color: Colors.white,fontSize: 20,),
            actions: <Widget>[
              widget.storage == null
                  ? Container()
                  : IconButton(
                      icon: Icon(Icons.delete),
                      onPressed: () {
                        showConfirmDialog(context, "storage.delete_confirm", () {
                          _delete(context);
                        });
                      },
                    ),
              IconButton(
                icon: Icon(Icons.save),
                onPressed: () {
                  _save(context);
                },
              )
            ],
          ),
          body: Form(
            key: _formKey,
            child: Column(
              children: <Widget>[
                Expanded(
                  child: ListView(
                    shrinkWrap: true,
                    padding: EdgeInsets.only(left: 24.0, right: 24.0),
                    children: <Widget>[
                      Container(
                        padding: EdgeInsets.only(top: 10),
                        child: TextFormField(
                          controller: nameController,
                          autofocus: false,
                          cursorColor: primaryColor,
                          decoration: new InputDecoration(
                            labelText: AppTranslations.of(context)
                                .text("storage.name"),
                            labelStyle:
                                languageModel.isEng ? labelStyle : labelStyleMM,
                            icon: Image.asset(
                              "assets/inventory.png",
                              color: primaryColor,
                              width: 25,
                            ),
                            enabledBorder: UnderlineInputBorder(
                                borderSide: BorderSide(
                                    color: primaryColor, width: 1.0)),
                            focusedBorder: UnderlineInputBorder(
                                borderSide: BorderSide(
                                    color: primaryColor, width: 1.0)),
                          ),
                          validator: (value) {
                            if (value.isEmpty) {
                              return AppTranslations.of(context)
                                  .text("storage.form.name");
                            }
                            return null;
                          },
                        ),
                      )
                    ],
                  ),
                ),
              ],
            ),
          )),
    );
  }

  void _save(BuildContext context) async {
    if (!_formKey.currentState.validate()) return;
    setState(() {
      _isLoading = true;
    });
    try {
      if (widget.storage != null) {
        widget.storage.name = nameController.text;
        await Provider.of<StorageModel>(context, listen: false)
            .updateStorage(widget.storage);
      } else {
        await Provider.of<StorageModel>(context, listen: false)
            .createStorage(Storage(name: nameController.text));
      }

      Navigator.pop(context);
    } catch (e) {
      showMsgDialog(context, "Error", e.toString());
    } finally {
      setState(() {
        _isLoading = false;
      });
    }
  }

  void _delete(BuildContext context) async {
    setState(() {
      _isLoading = true;
    });
    try {
      if (widget.storage != null) {
        await Provider.of<StorageModel>(context, listen: false)
            .deleteStorage(widget.storage.id);
      }
      Navigator.pop(context);
    } catch (e) {
      showMsgDialog(context, "Error", e.toString());
    } finally {
      setState(() {
        _isLoading = false;
      });
    }
  }
}