122 lines
2.7 KiB
Dart
122 lines
2.7 KiB
Dart
import 'package:flutter/material.dart';
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import '../data/models/coin.dart';
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import '../data/services/market_service.dart';
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/// 行情状态管理
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class MarketProvider extends ChangeNotifier {
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final MarketService _marketService;
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List<Coin> _allCoins = [];
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List<Coin> _filteredCoins = [];
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String _activeTab = 'all';
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String _searchKeyword = '';
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bool _isLoading = false;
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String? _error;
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bool _coinsLoaded = false; // 标记是否已加载
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MarketProvider(this._marketService);
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// Getters
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List<Coin> get coins => _filteredCoins;
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List<Coin> get allCoins => _allCoins;
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bool get isLoading => _isLoading;
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String? get error => _error;
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String get activeTab => _activeTab;
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String get searchKeyword => _searchKeyword;
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/// 加载币种列表
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Future<void> loadCoins({bool force = false}) async {
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// 如果已经加载过且不是强制刷新，则跳过
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if (_coinsLoaded && !force && _allCoins.isNotEmpty) {
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return;
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}
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_isLoading = true;
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_error = null;
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notifyListeners();
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try {
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final response = await _marketService.getCoinList();
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if (response.success) {
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_allCoins = response.data ?? [];
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_filterCoins();
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_coinsLoaded = true;
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} else {
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_error = response.message;
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}
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} catch (e) {
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_error = '加载失败: $e';
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}
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_isLoading = false;
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notifyListeners();
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}
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/// 设置分类标签
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void setTab(String tab) {
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_activeTab = tab;
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_filterCoins();
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notifyListeners();
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}
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/// 搜索
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void search(String keyword) {
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_searchKeyword = keyword;
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_filterCoins();
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notifyListeners();
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}
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/// 清除搜索
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void clearSearch() {
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_searchKeyword = '';
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_filterCoins();
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notifyListeners();
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}
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/// 筛选币种
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void _filterCoins() {
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List<Coin> result = List.from(_allCoins);
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// 按分类筛选
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if (_activeTab == 'realtime') {
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result = result.where((c) => c.isRealtime).toList();
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} else if (_activeTab == 'hot') {
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result = result.take(6).toList();
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}
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// 按关键词筛选
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if (_searchKeyword.isNotEmpty) {
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final kw = _searchKeyword.toLowerCase();
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result = result.where((c) =>
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c.code.toLowerCase().contains(kw) ||
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c.name.toLowerCase().contains(kw)).toList();
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}
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_filteredCoins = result;
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}
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/// 根据代码获取币种
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Coin? getCoinByCode(String code) {
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try {
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return _allCoins.firstWhere((c) => c.code == code);
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} catch (_) {
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return null;
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}
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}
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/// 刷新
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Future<void> refresh() async {
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await loadCoins(force: true);
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}
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/// 重置加载状态（用于退出登录时）
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void resetLoadState() {
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_coinsLoaded = false;
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_allCoins = [];
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_filteredCoins = [];
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_error = null;
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notifyListeners();
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}
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}
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