146 lines
4.1 KiB
Dart
146 lines
4.1 KiB
Dart
// Label StoreMAX
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//
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// Created by Anthony Gordon.
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// Copyright © 2020 WooSignal. All rights reserved.
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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import 'package:flutter/material.dart';
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import 'package:label_storemax/helpers/tools.dart';
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import 'package:label_storemax/widgets/app_loader.dart';
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import 'package:woosignal/models/response/product_category.dart';
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import 'package:woosignal/models/response/products.dart' as WS;
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import 'package:label_storemax/widgets/woosignal_ui.dart';
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class BrowseCategoryPage extends StatefulWidget {
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final ProductCategory productCategory;
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const BrowseCategoryPage({Key key, @required this.productCategory})
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: super(key: key);
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@override
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_BrowseCategoryPageState createState() =>
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_BrowseCategoryPageState(productCategory);
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}
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class _BrowseCategoryPageState extends State<BrowseCategoryPage> {
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_BrowseCategoryPageState(this._selectedCategory);
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List<WS.Product> _products = [];
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var _productsController = ScrollController();
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ProductCategory _selectedCategory;
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bool _isLoading;
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int _page;
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bool _shouldStopRequests;
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bool waitForNextRequest;
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@override
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void initState() {
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super.initState();
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_isLoading = true;
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_page = 1;
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_shouldStopRequests = false;
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waitForNextRequest = false;
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_fetchProductsForCategory();
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_addScrollListener();
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}
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_addScrollListener() async {
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_productsController.addListener(() {
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double maxScroll = _productsController.position.maxScrollExtent;
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double currentScroll = _productsController.position.pixels;
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double delta = 50.0;
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if (maxScroll - currentScroll <= delta) {
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if (_shouldStopRequests) {
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return;
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}
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if (waitForNextRequest) {
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return;
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}
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_fetchMoreProducts();
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}
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});
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}
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_fetchMoreProducts() async {
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waitForNextRequest = true;
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List<WS.Product> products = await appWooSignal((api) {
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return api.getProducts(perPage: 50, page: _page, status: "publish");
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});
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_products.addAll(products);
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waitForNextRequest = false;
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_page = _page + 1;
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waitForNextRequest = false;
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if (products.length == 0) {
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_shouldStopRequests = true;
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}
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}
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_fetchProductsForCategory() async {
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_products = await appWooSignal((api) {
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return api.getProducts(
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category: _selectedCategory.id.toString(), perPage: 50);
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});
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setState(() {
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_isLoading = false;
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});
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}
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@override
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void 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 Scaffold(
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appBar: AppBar(
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backgroundColor: Colors.transparent,
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title: Column(
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crossAxisAlignment: CrossAxisAlignment.center,
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mainAxisAlignment: MainAxisAlignment.center,
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children: <Widget>[
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Text(trans(context, "Browse"),
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style: Theme.of(context).primaryTextTheme.subhead),
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Text(_selectedCategory.name,
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style: Theme.of(context).primaryTextTheme.title)
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],
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),
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),
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body: SafeArea(
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minimum: safeAreaDefault(),
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child: _isLoading
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? Center(
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child: showAppLoader(),
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)
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: Column(
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mainAxisAlignment: MainAxisAlignment.spaceEvenly,
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crossAxisAlignment: CrossAxisAlignment.start,
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children: <Widget>[
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Expanded(
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child: (_products.length != null && _products.length > 0
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? GridView.count(
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crossAxisCount: 2,
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controller: _productsController,
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children: List.generate(_products.length, (index) {
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return wsCardProductItem(context,
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index: index, product: _products[index]);
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}))
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: wsNoResults(context)),
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flex: 1,
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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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