88 lines
2.5 KiB
Dart
88 lines
2.5 KiB
Dart
import 'dart:io';
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import 'package:flutter/material.dart';
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import 'package:path/path.dart' as path;
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import '../aves_dialog.dart';
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class RenameAlbumDialog extends StatefulWidget {
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final String album;
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const RenameAlbumDialog(this.album);
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@override
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_RenameAlbumDialogState createState() => _RenameAlbumDialogState();
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}
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class _RenameAlbumDialogState extends State<RenameAlbumDialog> {
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final TextEditingController _nameController = TextEditingController();
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final ValueNotifier<bool> _existsNotifier = ValueNotifier(false);
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final ValueNotifier<bool> _isValidNotifier = ValueNotifier(false);
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String get album => widget.album;
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String get initialValue => path.basename(album);
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@override
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void initState() {
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super.initState();
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_nameController.text = initialValue;
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_validate();
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}
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@override
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void dispose() {
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_nameController.dispose();
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super.dispose();
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}
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@override
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Widget build(BuildContext context) {
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return AvesDialog(
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content: ValueListenableBuilder<bool>(
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valueListenable: _existsNotifier,
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builder: (context, exists, child) {
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return TextField(
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controller: _nameController,
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decoration: InputDecoration(
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labelText: 'New name',
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helperText: exists ? 'Album already exists' : '',
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),
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autofocus: true,
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onChanged: (_) => _validate(),
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onSubmitted: (_) => _submit(context),
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);
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}),
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actions: [
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FlatButton(
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onPressed: () => Navigator.pop(context),
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child: Text('Cancel'.toUpperCase()),
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),
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ValueListenableBuilder<bool>(
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valueListenable: _isValidNotifier,
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builder: (context, isValid, child) {
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return FlatButton(
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onPressed: isValid ? () => _submit(context) : null,
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child: Text('Apply'.toUpperCase()),
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);
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},
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)
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],
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);
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}
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String _buildAlbumPath(String name) {
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if (name == null || name.isEmpty) return '';
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return path.join(path.dirname(album), name);
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}
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Future<void> _validate() async {
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final newName = _nameController.text ?? '';
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final path = _buildAlbumPath(newName);
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final exists = newName.isNotEmpty && await FileSystemEntity.type(path) != FileSystemEntityType.notFound;
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_existsNotifier.value = exists && newName != initialValue;
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_isValidNotifier.value = newName.isNotEmpty && !exists;
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}
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void _submit(BuildContext context) => Navigator.pop(context, _nameController.text);
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}
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