107 lines
2.8 KiB
Dart
107 lines
2.8 KiB
Dart
import 'package:flutter_riverpod/flutter_riverpod.dart';
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import '../services/wallet_service.dart';
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/// 钱包状态：钱包信息 + 积分明细（biz_type 筛选 + 触底分页）
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class WalletState {
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const WalletState({
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this.wallet,
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this.records = const [],
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this.recordsTotal = 0,
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this.bizType,
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this.isLoading = false,
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this.loadFailed = false,
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this.loadingMore = false,
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});
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final WalletInfo? wallet;
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final List<PointsRecord> records;
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final int recordsTotal;
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/// null = 全部
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final int? bizType;
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final bool isLoading;
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final bool loadFailed;
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final bool loadingMore;
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bool get hasMore => records.length < recordsTotal;
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WalletState copyWith({
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WalletInfo? wallet,
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List<PointsRecord>? records,
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int? recordsTotal,
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int? Function()? bizType,
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bool? isLoading,
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bool? loadFailed,
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bool? loadingMore,
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}) =>
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WalletState(
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wallet: wallet ?? this.wallet,
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records: records ?? this.records,
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recordsTotal: recordsTotal ?? this.recordsTotal,
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bizType: bizType != null ? bizType() : this.bizType,
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isLoading: isLoading ?? this.isLoading,
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loadFailed: loadFailed ?? this.loadFailed,
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loadingMore: loadingMore ?? this.loadingMore,
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);
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}
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class WalletNotifier extends StateNotifier<WalletState> {
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WalletNotifier() : super(const WalletState()) {
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load();
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}
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static const _pageSize = 20;
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Future<void> load() async {
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state = state.copyWith(isLoading: true, loadFailed: false);
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try {
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final wallet = await WalletService.fetchWallet();
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final page = await WalletService.fetchPointsRecords(
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page: 1,
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pageSize: _pageSize,
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bizType: state.bizType,
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);
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state = state.copyWith(
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wallet: wallet,
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records: page.items,
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recordsTotal: page.total,
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isLoading: false,
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);
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} catch (_) {
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state = state.copyWith(isLoading: false, loadFailed: true);
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}
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}
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/// 切换 biz_type 筛选并重载明细
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Future<void> setBizType(int? bizType) async {
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if (bizType == state.bizType) return;
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state = state.copyWith(bizType: () => bizType);
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await load();
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}
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/// 触底加载下一页
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Future<void> loadMore() async {
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if (state.loadingMore || !state.hasMore || state.isLoading) return;
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state = state.copyWith(loadingMore: true);
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try {
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final page = await WalletService.fetchPointsRecords(
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page: state.records.length ~/ _pageSize + 1,
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pageSize: _pageSize,
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bizType: state.bizType,
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);
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state = state.copyWith(
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records: [...state.records, ...page.items],
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recordsTotal: page.total,
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loadingMore: false,
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);
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} catch (_) {
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state = state.copyWith(loadingMore: false);
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}
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}
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}
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final walletProvider = StateNotifierProvider<WalletNotifier, WalletState>(
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(_) => WalletNotifier(),
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);
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