404 lines
20 KiB
Dart
404 lines
20 KiB
Dart
// Import necessary packages and widgets for the application.
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import 'package:cheminova/widgets/common_app_bar.dart';
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import 'package:cheminova/widgets/common_background.dart';
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import 'package:cheminova/widgets/common_drawer.dart';
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import 'package:cheminova/widgets/common_elevated_button.dart';
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import 'package:flutter/material.dart';
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import 'package:flutter/services.dart';
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import 'package:provider/provider.dart';
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import '../provider/products_provider.dart';
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// Stateful widget for the Add Products screen.
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class AddProductsScreen extends StatefulWidget {
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final String distributorType; // Type of distributor (e.g., Retailer, Wholesaler)
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final String tradeName; // Trade name of the distributor
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final String pdRdId; // Principal distributor/retailer ID
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final String? inventoryId; // Optional inventory ID
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// Constructor for AddProductsScreen, with required parameters.
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const AddProductsScreen({
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super.key,
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required this.distributorType,
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required this.tradeName,
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required this.pdRdId,
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this.inventoryId,
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});
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@override
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State<AddProductsScreen> createState() => _AddProductsScreenState();
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}
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class _AddProductsScreenState extends State<AddProductsScreen> {
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// Controller for the search input field.
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final searchController = TextEditingController();
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// ProductProvider for managing product-related logic.
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late ProductProvider productProvider;
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@override
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void initState() {
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// Initialize the productProvider and fetch the products after the widget is built.
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productProvider = Provider.of<ProductProvider>(context, listen: false);
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WidgetsBinding.instance.addPostFrameCallback((timeStamp) {
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productProvider.getProducts();
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});
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super.initState();
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}
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@override
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void dispose() {
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// Reset the products list when the screen is disposed.
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if (context.mounted) {
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productProvider.resetProducts();
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}
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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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// Build the main UI for the screen.
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return CommonBackground(
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child: Scaffold(
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backgroundColor: Colors.transparent,
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appBar: CommonAppBar(
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actions: [
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IconButton(
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onPressed: () => Navigator.pop(context),
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icon: Image.asset('assets/Back_attendance.png'),
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padding: const EdgeInsets.only(right: 20)
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)
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],
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title: Text(
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'${widget.distributorType}\n${widget.tradeName}',
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textAlign: TextAlign.center,
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style: const TextStyle(
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fontSize: 20,
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color: Colors.black,
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fontWeight: FontWeight.w400,
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fontFamily: 'Anek'
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)
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),
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backgroundColor: Colors.transparent,
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elevation: 0
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),
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drawer: const CommonDrawer(),
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// BottomNavigationBar which holds the "Add Products" and "Submit" button.
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bottomNavigationBar: Consumer<ProductProvider>(
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builder: (context, value, child) => Column(
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mainAxisSize: MainAxisSize.min,
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children: [
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Align(
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alignment: value.selectedProducts.isEmpty
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? Alignment.center
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: Alignment.bottomCenter,
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child: Padding(
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padding: const EdgeInsets.all(16.0),
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child: Column(
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mainAxisSize: MainAxisSize.min,
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children: [
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// Floating Action Button to add products
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FloatingActionButton.extended(
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onPressed: () {
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showModalBottomSheet(
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isScrollControlled: true,
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constraints: BoxConstraints(
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maxHeight: MediaQuery.of(context).size.height * 0.9
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),
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context: context,
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builder: (BuildContext context) {
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// Display list of products with a search bar in the modal sheet.
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return Consumer<ProductProvider>(
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builder: (context, value, child) => StatefulBuilder(
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builder: (context, setState) {
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return Column(
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children: [
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// Search bar to filter products
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Padding(
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padding: const EdgeInsets.all(18.0),
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child: TextField(
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controller: searchController,
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decoration: const InputDecoration(
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labelText: 'Search by name or SKU',
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border: OutlineInputBorder(),
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prefixIcon: Icon(Icons.search)
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),
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onChanged: (val) {
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value.filterProducts(val);
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setState(() {});
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}
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)
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),
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// List of products (filtered or all)
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Expanded(
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child: ListView.builder(
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itemCount: searchController.text.isEmpty
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? value.productList.length
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: value.searchList.length,
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itemBuilder: (context, index) {
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// Check if the product is already selected.
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bool isAlreadySelected = value.selectedProducts.any(
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(selectedProduct) => selectedProduct.sku == value.productList[index].sku
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);
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final data = searchController.text.isEmpty
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? value.productList[index]
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: value.searchList[index];
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// Product tile with name, SKU, and selection functionality.
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return Card(
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child: ListTile(
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title: Text(
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data.productName,
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style: TextStyle(color: isAlreadySelected ? Colors.grey : Colors.black)
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),
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subtitle: Text(
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data.sku,
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style: TextStyle(color: isAlreadySelected ? Colors.grey : Colors.black)
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),
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onTap: isAlreadySelected
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? null
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: () {
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setState(() => value.selectedProducts.add(data));
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Navigator.pop(context);
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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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);
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},
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).whenComplete(() => setState(() {}));
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},
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backgroundColor: Colors.white,
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icon: const Icon(Icons.add, color: Colors.black),
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label: const Text('Add Products', style: TextStyle(color: Colors.black))
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),
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// Display Submit button if products are selected.
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if (value.selectedProducts.isNotEmpty) ...[
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const SizedBox(height: 16.0),
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Consumer<ProductProvider>(
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builder: (context, value, child) => CommonElevatedButton(
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borderRadius: 30,
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width: double.infinity,
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height: kToolbarHeight - 10,
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text: 'SUBMIT',
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backgroundColor: const Color(0xff004791),
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// Submit selected products, but first validate the data.
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onPressed: () {
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if (value.selectedProducts.isNotEmpty &&
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value.selectedProducts.every((product) =>
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product.sku.isNotEmpty &&
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product.productName.isNotEmpty &&
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product.sale != null &&
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product.inventory != null)) {
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value.submitProducts(
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distributorType: widget.distributorType,
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pdRdId: widget.pdRdId, inventoryId: widget.inventoryId
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);
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} else {
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// Show error message if data is incomplete.
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ScaffoldMessenger.of(context).showSnackBar(
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const SnackBar(
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content: Text('Please fill out all product details, including sale and inventory.')
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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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),
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],
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),
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),
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// Main body of the screen that shows the selected products and the loader.
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body: Consumer<ProductProvider>(
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builder: (context, value, child) {
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return Stack(
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children: [
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Column(
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children: [
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// Display the selected products in a list.
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if (value.selectedProducts.isNotEmpty)
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Expanded(
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child: ListView.builder(
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itemCount: value.selectedProducts.length,
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itemBuilder: (context, index) {
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// Display individual product blocks.
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return ProductBlock(
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onUpdate: (updatedProduct) {
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debugPrint('selected product length: ${value.selectedProducts.length}');
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setState(() {
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value.selectedProducts[index] = updatedProduct;
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});
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},
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onRemove: () {
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setState(() {
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value.selectedProducts.removeAt(index);
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});
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},
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product: value.selectedProducts[index]
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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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// Show loader when products are being fetched.
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(value.isLoading)
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? Container(
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color: Colors.black12,
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child: const Center(child: CircularProgressIndicator())
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)
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: const SizedBox()
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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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// Widget to represent individual product blocks in the selected products list.
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class ProductBlock extends StatefulWidget {
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final ProductModel product; // The product model to be displayed.
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final ValueChanged<ProductModel> onUpdate; // Callback when product data is updated.
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final VoidCallback onRemove; // Callback to remove the product.
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const ProductBlock({
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super.key,
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required this.product,
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required this.onUpdate,
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required this.onRemove,
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});
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@override
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State<ProductBlock> createState() => _ProductBlockState();
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}
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class _ProductBlockState extends State<ProductBlock> {
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// Controllers for sale and inventory text fields.
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final saleController = TextEditingController();
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final inventoryController = TextEditingController();
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String? errorMessage; // Error message for input validation.
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@override
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void initState() {
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super.initState();
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// Initialize controllers with existing product data.
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saleController.text = (widget.product.sale ?? '').toString();
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inventoryController.text = (widget.product.inventory ?? '').toString();
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}
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// Validate the inputs for sale and inventory fields.
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void validateInput() {
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setState(() {
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String? saleError;
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String? inventoryError;
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if (saleController.text.isEmpty) {
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saleError = 'Sale cannot be empty.';
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}
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if (inventoryController.text.isEmpty) {
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inventoryError = 'Inventory cannot be empty.';
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}
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errorMessage = null;
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if (saleError == null && inventoryError == null) {
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int sale = int.parse(saleController.text);
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int inventory = int.parse(inventoryController.text);
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// Update the product with validated data.
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widget.onUpdate(ProductModel(
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sku: widget.product.sku,
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productName: widget.product.productName,
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sale: sale,
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inventory: inventory,
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));
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} else {
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errorMessage = saleError ?? inventoryError;
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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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return Card(
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color: Colors.white,
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margin: const EdgeInsets.all(8),
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child: Stack(
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children: [
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Padding(
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padding: const EdgeInsets.all(16),
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child: Column(
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crossAxisAlignment: CrossAxisAlignment.start,
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children: [
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Text('Product: ${widget.product.productName}',
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style: const TextStyle(fontSize: 16)),
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Text('SKU: ${widget.product.sku}',
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style: const TextStyle(fontSize: 15)),
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const SizedBox(height: 8),
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Column(
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crossAxisAlignment: CrossAxisAlignment.start,
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children: [
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// Text field for sale input.
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TextField(
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controller: saleController,
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onTapOutside: (event) => FocusScope.of(context).unfocus(),
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inputFormatters: [FilteringTextInputFormatter.digitsOnly],
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decoration: InputDecoration(
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labelText: 'Sale',
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errorText: saleController.text.isEmpty
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? 'Sale cannot be empty.'
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: null
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),
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keyboardType: TextInputType.number,
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enabled: true,
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onChanged: (_) => validateInput()
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),
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// Text field for inventory input.
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TextField(
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controller: inventoryController,
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onTapOutside: (event) => FocusScope.of(context).unfocus(),
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inputFormatters: [FilteringTextInputFormatter.digitsOnly],
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decoration: InputDecoration(
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labelText: 'Inventory',
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errorText: inventoryController.text.isEmpty
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? 'Inventory cannot be empty.'
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: null
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),
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keyboardType: TextInputType.number,
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enabled: true,
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onChanged: (_) => validateInput()
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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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// Remove button for the product block.
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Positioned(
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top: 4,
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right: 4,
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child: IconButton(
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icon: const Icon(Icons.delete_outline, color: Colors.red),
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onPressed: widget.onRemove,
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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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