init
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import 'dart:io';
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import 'package:flutter/material.dart';
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import 'package:go_router/go_router.dart';
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import 'package:image_picker/image_picker.dart';
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import 'package:path/path.dart' as path;
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import 'package:path_provider/path_provider.dart';
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import 'package:provider/provider.dart';
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import '../models/product.dart';
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import '../viewmodels/product_list_view_model.dart';
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class ProductFormView extends StatefulWidget {
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final String? productId;
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const ProductFormView({
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super.key,
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this.productId,
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});
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bool get isEditing => productId != null;
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@override
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State<ProductFormView> createState() => _ProductFormViewState();
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}
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class _ProductFormViewState extends State<ProductFormView> {
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final _formKey = GlobalKey<FormState>();
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final _nameController = TextEditingController();
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final _priceController = TextEditingController();
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final _stockController = TextEditingController();
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final _lowStockController = TextEditingController();
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String? _selectedCategory;
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final _categoryController = TextEditingController();
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final _imagePicker = ImagePicker();
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Product? _existingProduct;
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String? _imagePath;
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bool _isLoading = true;
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bool _isSaving = false;
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@override
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void initState() {
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super.initState();
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_loadProductIfNeeded();
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}
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Future<void> _loadProductIfNeeded() async {
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if (!widget.isEditing) {
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setState(() => _isLoading = false);
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return;
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}
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final viewModel = context.read<ProductListViewModel>();
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final product = await viewModel.getProductById(widget.productId!);
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if (!mounted) return;
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if (product == null) {
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ScaffoldMessenger.of(context).showSnackBar(
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const SnackBar(
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content: Text('Product not found.'),
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),
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);
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context.go('/products');
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return;
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}
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_existingProduct = product;
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_nameController.text = product.name;
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_selectedCategory = product.category;
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_priceController.text = (product.priceInCents / 100).toStringAsFixed(2);
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_stockController.text = product.stockQuantity.toString();
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_lowStockController.text = product.lowStockThreshold.toString();
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_imagePath = product.imagePath;
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setState(() => _isLoading = false);
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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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_priceController.dispose();
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_stockController.dispose();
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_lowStockController.dispose();
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super.dispose();
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}
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Future<String> _copyImageToAppFolder(XFile pickedFile) async {
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final appDirectory = await getApplicationSupportDirectory();
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final imagesDirectory = Directory(
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path.join(appDirectory.path, 'product_images'),
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);
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if (!await imagesDirectory.exists()) {
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await imagesDirectory.create(recursive: true);
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}
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final extension = path.extension(pickedFile.path);
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final fileName = 'product_${DateTime.now().millisecondsSinceEpoch}$extension';
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final newPath = path.join(imagesDirectory.path, fileName);
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final copiedFile = await File(pickedFile.path).copy(newPath);
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return copiedFile.path;
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}
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Future<void> _pickImage() async {
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final pickedFile = await _imagePicker.pickImage(
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source: ImageSource.gallery,
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imageQuality: 85,
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maxWidth: 1000,
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);
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if (pickedFile == null) return;
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final copiedImagePath = await _copyImageToAppFolder(pickedFile);
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if (!mounted) return;
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setState(() {
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_imagePath = copiedImagePath;
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});
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}
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int _parsePriceToCents(String value) {
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final normalized = value.replaceAll(',', '.');
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final euros = double.tryParse(normalized) ?? 0;
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return (euros * 100).round();
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}
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Future<void> _save() async {
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if (!_formKey.currentState!.validate()) return;
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if (_imagePath == null || _imagePath!.isEmpty) {
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ScaffoldMessenger.of(context).showSnackBar(
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const SnackBar(
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content: Text('Choose a product image.'),
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),
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);
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return;
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}
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if (_selectedCategory == null) {
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ScaffoldMessenger.of(context).showSnackBar(
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const SnackBar(
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content: Text('Please select a category.'),
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),
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);
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return;
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}
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setState(() => _isSaving = true);
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final viewModel = context.read<ProductListViewModel>();
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final name = _nameController.text.trim();
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final category = _selectedCategory!;
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final priceInCents = _parsePriceToCents(_priceController.text);
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final stockQuantity = int.parse(_stockController.text);
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final lowStockThreshold = int.parse(_lowStockController.text);
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if (widget.isEditing) {
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final updatedProduct = _existingProduct!.copyWith(
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name: name,
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category: category,
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priceInCents: priceInCents,
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stockQuantity: stockQuantity,
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lowStockThreshold: lowStockThreshold,
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imagePath: _imagePath,
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);
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await viewModel.updateProduct(updatedProduct);
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} else {
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await viewModel.addProduct(
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name: name,
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category: category,
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priceInCents: priceInCents,
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stockQuantity: stockQuantity,
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lowStockThreshold: lowStockThreshold,
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imagePath: _imagePath,
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);
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}
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if (!mounted) return;
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setState(() => _isSaving = false);
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context.go('/products');
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}
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Future<void> _delete() async {
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if (!widget.isEditing) return;
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final confirmed = await showDialog<bool>(
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context: context,
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builder: (dialogContext) {
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return AlertDialog(
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title: const Text('Delete product?'),
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content: const Text(
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'This will remove the product from the product list.',
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),
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actions: [
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TextButton(
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onPressed: () => Navigator.of(dialogContext).pop(false),
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child: const Text('Cancel'),
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),
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FilledButton(
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onPressed: () => Navigator.of(dialogContext).pop(true),
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child: const Text('Delete'),
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),
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],
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);
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},
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);
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if (confirmed != true) return;
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final viewModel = context.read<ProductListViewModel>();
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await viewModel.deleteProduct(widget.productId!);
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if (!mounted) return;
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context.go('/products');
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}
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Widget _buildImagePicker(BuildContext context) {
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final hasImage = _imagePath != null && File(_imagePath!).existsSync();
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return InkWell(
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onTap: _pickImage,
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borderRadius: BorderRadius.circular(12),
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child: Container(
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height: 220,
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decoration: BoxDecoration(
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borderRadius: BorderRadius.circular(12),
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border: Border.all(
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color: Theme.of(context).colorScheme.outline,
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),
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),
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clipBehavior: Clip.antiAlias,
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child: hasImage
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? Stack(
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fit: StackFit.expand,
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children: [
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Image.file(
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File(_imagePath!),
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fit: BoxFit.fitHeight,
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),
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Positioned(
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right: 12,
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bottom: 12,
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child: FilledButton.icon(
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onPressed: _pickImage,
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icon: const Icon(Icons.image),
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label: const Text('Change image'),
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),
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),
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],
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)
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: Center(
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child: Column(
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mainAxisSize: MainAxisSize.min,
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children: [
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const Icon(Icons.add_photo_alternate_outlined, size: 48),
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const SizedBox(height: 12),
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Text(
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'Choose product image',
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style: Theme.of(context).textTheme.titleMedium,
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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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}
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@override
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Widget build(BuildContext context) {
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final title = widget.isEditing ? 'Edit product' : 'Add product';
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return Scaffold(
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appBar: AppBar(
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title: Text(title),
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leading: IconButton(
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icon: const Icon(Icons.arrow_back),
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onPressed: () => context.go('/products'),
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),
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actions: [
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if (widget.isEditing)
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IconButton(
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onPressed: _delete,
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icon: const Icon(Icons.delete_outline),
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),
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],
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),
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resizeToAvoidBottomInset: false,
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body: _isLoading
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? const Center(
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child: CircularProgressIndicator(),
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)
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: Center(
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child: ConstrainedBox(
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constraints: const BoxConstraints(maxWidth: 720),
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child: Form(
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key: _formKey,
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child: ListView(
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padding: const EdgeInsets.all(24),
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children: [
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_buildImagePicker(context),
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const SizedBox(height: 24),
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TextFormField(
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controller: _nameController,
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decoration: const InputDecoration(
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labelText: 'Product name',
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border: OutlineInputBorder(),
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),
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textInputAction: TextInputAction.next,
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validator: (value) {
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if (value == null || value.trim().isEmpty) {
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return 'Enter a product name.';
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}
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return null;
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},
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),
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const SizedBox(height: 16),
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Consumer<ProductListViewModel>(
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builder: (context, viewModel, child) {
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return LayoutBuilder(
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builder: (context, constraints) {
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return DropdownMenu<String>(
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width: constraints.maxWidth,
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initialSelection: _selectedCategory,
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enableFilter: true,
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enableSearch: true,
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controller: _categoryController,
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requestFocusOnTap: true,
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label: const Text('Category'),
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hintText: 'Select a category',
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dropdownMenuEntries: viewModel.categories
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.map(
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(category) => DropdownMenuEntry<String>(
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value: category,
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label: category,
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),
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)
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.toList(),
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onSelected: (value) {
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setState(() {
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_selectedCategory = value;
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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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),
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const SizedBox(height: 16),
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TextFormField(
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controller: _priceController,
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decoration: const InputDecoration(
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labelText: 'Price',
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prefixText: '€ ',
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border: OutlineInputBorder(),
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),
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keyboardType: const TextInputType.numberWithOptions(
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decimal: true,
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),
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textInputAction: TextInputAction.next,
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validator: (value) {
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if (value == null || value.trim().isEmpty) {
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return 'Enter a price.';
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}
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final normalized = value.replaceAll(',', '.');
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final price = double.tryParse(normalized);
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if (price == null || price < 0) {
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return 'Enter a valid price.';
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}
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return null;
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},
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),
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const SizedBox(height: 16),
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TextFormField(
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controller: _stockController,
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decoration: const InputDecoration(
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labelText: 'Current stock',
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border: OutlineInputBorder(),
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),
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keyboardType: TextInputType.number,
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textInputAction: TextInputAction.next,
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validator: (value) {
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final number = int.tryParse(value ?? '');
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if (number == null || number < 0) {
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return 'Enter a valid stock amount.';
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}
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return null;
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},
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),
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const SizedBox(height: 16),
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TextFormField(
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controller: _lowStockController,
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decoration: const InputDecoration(
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labelText: 'Low stock warning threshold',
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border: OutlineInputBorder(),
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),
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keyboardType: TextInputType.number,
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validator: (value) {
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final number = int.tryParse(value ?? '');
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if (number == null || number < 0) {
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return 'Enter a valid threshold.';
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}
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return null;
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},
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),
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const SizedBox(height: 24),
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FilledButton.icon(
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onPressed: _isSaving ? null : _save,
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icon: _isSaving
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? const SizedBox(
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width: 18,
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height: 18,
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child: CircularProgressIndicator(
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strokeWidth: 2,
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),
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)
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: const Icon(Icons.save),
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label: Text(
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widget.isEditing ? 'Save changes' : 'Add product',
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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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),
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);
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}
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}
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Reference in New Issue
Block a user