nc-photos/app/lib/widget/photo_date_time_edit_dialog.dart

import 'package:flutter/material.dart';
import 'package:logging/logging.dart';
import 'package:nc_photos/app_localizations.dart';
import 'package:nc_photos/num_extension.dart';

class PhotoDateTimeEditDialog extends StatefulWidget {
  const PhotoDateTimeEditDialog({
    Key? key,
    required this.initialDateTime,
  }) : super(key: key);

  @override
  createState() => _PhotoDateTimeEditDialogState();

  final DateTime initialDateTime;
}

class _PhotoDateTimeEditDialogState extends State<PhotoDateTimeEditDialog> {
  @override
  build(BuildContext context) {
    return AlertDialog(
      title: Text(L10n.global().updateDateTimeDialogTitle),
      content: Form(
        key: _formKey,
        child: Column(
          crossAxisAlignment: CrossAxisAlignment.start,
          mainAxisSize: MainAxisSize.min,
          children: [
            Text(
              L10n.global().dateSubtitle,
              style: Theme.of(context).textTheme.subtitle2,
            ),
            Row(
              children: [
                Flexible(
                  child: TextFormField(
                    decoration: InputDecoration(
                      hintText: L10n.global().dateYearInputHint,
                    ),
                    keyboardType: TextInputType.number,
                    validator: (value) {
                      try {
                        int.parse(value!);
                        return null;
                      } catch (_) {
                        return L10n.global().dateTimeInputInvalid;
                      }
                    },
                    onSaved: (value) {
                      _formValue.year = int.parse(value!);
                    },
                    initialValue: "${widget.initialDateTime.year}",
                  ),
                  flex: 1,
                ),
                const SizedBox(width: 4),
                Flexible(
                  child: TextFormField(
                    decoration: InputDecoration(
                      hintText: L10n.global().dateMonthInputHint,
                    ),
                    keyboardType: TextInputType.number,
                    validator: (value) {
                      if (int.tryParse(value!)?.inRange(1, 12) == true) {
                        return null;
                      }
                      return L10n.global().dateTimeInputInvalid;
                    },
                    onSaved: (value) {
                      _formValue.month = int.parse(value!);
                    },
                    initialValue:
                        widget.initialDateTime.month.toString().padLeft(2, "0"),
                  ),
                  flex: 1,
                ),
                const SizedBox(width: 4),
                Flexible(
                  child: TextFormField(
                    decoration: InputDecoration(
                      hintText: L10n.global().dateDayInputHint,
                    ),
                    keyboardType: TextInputType.number,
                    validator: (value) {
                      if (int.tryParse(value!)?.inRange(1, 31) == true) {
                        return null;
                      }
                      return L10n.global().dateTimeInputInvalid;
                    },
                    onSaved: (value) {
                      _formValue.day = int.parse(value!);
                    },
                    initialValue:
                        widget.initialDateTime.day.toString().padLeft(2, "0"),
                  ),
                  flex: 1,
                ),
              ],
            ),
            const SizedBox(height: 16),
            Text(
              L10n.global().timeSubtitle,
              style: Theme.of(context).textTheme.subtitle2,
            ),
            Row(
              children: [
                Flexible(
                  child: TextFormField(
                    decoration: InputDecoration(
                      hintText: L10n.global().timeHourInputHint,
                    ),
                    keyboardType: TextInputType.number,
                    validator: (value) {
                      if (int.tryParse(value!)?.inRange(0, 23) == true) {
                        return null;
                      }
                      return L10n.global().dateTimeInputInvalid;
                    },
                    onSaved: (value) {
                      _formValue.hour = int.parse(value!);
                    },
                    initialValue:
                        widget.initialDateTime.hour.toString().padLeft(2, "0"),
                  ),
                  flex: 1,
                ),
                const SizedBox(width: 4),
                Flexible(
                  child: TextFormField(
                    decoration: InputDecoration(
                      hintText: L10n.global().timeMinuteInputHint,
                    ),
                    keyboardType: TextInputType.number,
                    validator: (value) {
                      if (int.tryParse(value!)?.inRange(0, 59) == true) {
                        return null;
                      }
                      return L10n.global().dateTimeInputInvalid;
                    },
                    onSaved: (value) {
                      _formValue.minute = int.parse(value!);
                    },
                    initialValue: widget.initialDateTime.minute
                        .toString()
                        .padLeft(2, "0"),
                  ),
                  flex: 1,
                ),
                const SizedBox(width: 4),
                const Flexible(
                  child: SizedBox(),
                  flex: 1,
                ),
              ],
            ),
          ],
        ),
      ),
      actions: [
        TextButton(
          onPressed: () => _onSavePressed(context),
          child: Text(MaterialLocalizations.of(context).saveButtonLabel),
        ),
      ],
    );
  }

  void _onSavePressed(BuildContext context) {
    if (_formKey.currentState?.validate() == true) {
      _formKey.currentState!.save();
      final d = DateTime(_formValue.year, _formValue.month, _formValue.day,
          _formValue.hour, _formValue.minute);
      _log.info("[_onSavePressed] Set date time: $d");
      Navigator.of(context).pop(d);
    }
  }

  final _formKey = GlobalKey<FormState>();
  final _formValue = _FormValue();

  static final _log = Logger(
      "widget.photo_date_time_edit_dialog._PhotoDateTimeEditDialogState");
}

class _FormValue {
  late int year;
  late int month;
  late int day;
  late int hour;
  late int minute;
}