calorimeter/lib/food_entry/enter_food_widget.dart

/* SPDX-License-Identifier: GPL-3.0-or-later */
/* Copyright (C) 2024 Marco Groß <mgross@sw-gross.de> */

import 'package:flutter/material.dart';
import 'package:calorimeter/food_entry/food_entry_bloc.dart';
import 'package:calorimeter/utils/row_with_spacers_widget.dart';
import 'package:flutter_gen/gen_l10n/app_localizations.dart';

class EnterFoodWidget extends StatefulWidget {
  final Function(BuildContext context, FoodEntryState entry) onAdd;
  final Map<String, int> foodEntryLookupDatabase;

  const EnterFoodWidget(
      {super.key, required this.onAdd, required this.foodEntryLookupDatabase});

  @override
  State<EnterFoodWidget> createState() => _EnterFoodWidgetState();
}

class _EnterFoodWidgetState extends State<EnterFoodWidget> {
  late TextEditingController nameController;
  late TextEditingController massController;
  late TextEditingController kcalPerMassController;
  late bool open;

  @override
  void initState() {
    nameController = TextEditingController();
    massController = TextEditingController();
    kcalPerMassController = TextEditingController();

    open = false;

    super.initState();
  }

  @override
  Widget build(BuildContext context) {
    return Column(
      children: [
        Stack(
          children: [
            if (!open)
              RowWidget(
                showDividers: false,
                null,
                null,
                null,
                ElevatedButton(
                    style: ElevatedButton.styleFrom(
                      padding: EdgeInsets.zero,
                    ),
                    onPressed: () => setState(() => open = true),
                    child: Icon(Icons.add)),
              ),
            Offstage(
              offstage: !open,
              child: AnimatedOpacity(
                duration: Duration(milliseconds: 250),
                opacity: open ? 1.0 : 0.0,
                child: RowWidget(
                  showDividers: true,
                  Autocomplete<String>(
                      optionsViewOpenDirection: OptionsViewOpenDirection.down,
                      fieldViewBuilder:
                          (context, controller, focusNode, onSubmitted) {
                        nameController = controller;
                        return TextFormField(
                          scrollPadding: EdgeInsets.only(bottom: 100),
                          controller: controller,
                          focusNode: focusNode,
                          decoration: InputDecoration(
                            label: Text(AppLocalizations.of(context)!.name),
                          ),
                        );
                      },
                      optionsBuilder: (TextEditingValue textEditingValue) {
                        if (textEditingValue.text == '') {
                          return const Iterable<String>.empty();
                        }

                        return widget.foodEntryLookupDatabase.keys.where(
                          (name) {
                            return name
                                .toLowerCase()
                                .contains(textEditingValue.text.toLowerCase());
                          },
                        );
                      },
                      onSelected: (selectedFood) {
                        int kcalPerMassForSelectedFood =
                            widget.foodEntryLookupDatabase[selectedFood]!;
                        setState(() {
                          nameController.text = selectedFood;
                          kcalPerMassController.text =
                              kcalPerMassForSelectedFood.toString();
                        });
                      }),
                  TextField(
                    scrollPadding: EdgeInsets.only(bottom: 100),
                    textAlign: TextAlign.end,
                    decoration: InputDecoration(
                      label: Directionality(
                        textDirection: TextDirection.rtl,
                        child: Text(AppLocalizations.of(context)!.amount),
                      ),
                    ),
                    keyboardType: TextInputType.number,
                    controller: massController,
                    onSubmitted: (value) => onSubmitAction(),
                  ),
                  TextField(
                    scrollPadding: EdgeInsets.only(bottom: 100),
                    textAlign: TextAlign.end,
                    decoration: InputDecoration(
                        label: Directionality(
                            textDirection: TextDirection.rtl,
                            child: Text(AppLocalizations.of(context)!.kcal))),
                    keyboardType: TextInputType.number,
                    controller: kcalPerMassController,
                    onSubmitted: (value) => onSubmitAction(),
                  ),
                  ElevatedButton(
                      style: ElevatedButton.styleFrom(
                        padding: EdgeInsets.zero,
                      ),
                      onPressed: () => onSubmitAction(),
                      child: const Icon(Icons.check)),
                ),
              ),
            ),
          ],
        ),
        SizedBox(
            height: 200,
            child: GestureDetector(
                onTap: () => setState(() {
                      open = false;
                    }))),
      ],
    );
  }

  void onSubmitAction() {
    int massAsNumber = 0;
    int kcalPerMassAsNumber = 0;

    try {
      massAsNumber = int.parse(massController.text.replaceAll(",", "."));
    } catch (e) {
      var snackbar = SnackBar(
          content: Text(AppLocalizations.of(context)!.errAmountNotANumber));
      ScaffoldMessenger.of(context).clearSnackBars();
      ScaffoldMessenger.of(context).showSnackBar(snackbar);
      return;
    }

    try {
      kcalPerMassAsNumber =
          int.parse(kcalPerMassController.text.replaceAll(",", "."));
    } catch (e) {
      var snackbar = SnackBar(
          content: Text(AppLocalizations.of(context)!.errKcalNotANumber));
      ScaffoldMessenger.of(context).removeCurrentSnackBar();
      ScaffoldMessenger.of(context).showSnackBar(snackbar);
      return;
    }

    var entry = FoodEntryState(
      name: nameController.text,
      mass: massAsNumber,
      kcalPer100: kcalPerMassAsNumber,
      waitingForNetwork: false,
      isSelected: false,
    );

    widget.onAdd(context, entry);
    setState(() {
      nameController.text = "";
      massController.text = "";
      kcalPerMassController.text = "";
      open = false;
    });
  }
}