91 lines
2.3 KiB
Dart
91 lines
2.3 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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/// 行情狀態管理
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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> _platformCoins = [];
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List<Coin> _nonPlatformCoins = [];
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bool _isLoading = false;
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String? _error;
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bool _coinsLoaded = false;
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MarketProvider(this._marketService);
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// Getters
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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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List<Coin> get platformCoins => _platformCoins;
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List<Coin> get nonPlatformCoins => _nonPlatformCoins;
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/// 加載幣種列表
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Future<void> loadCoins({bool force = false}) async {
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if (_coinsLoaded && !force && _allCoins.isNotEmpty) {
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return;
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}
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final isFirstLoad = !_coinsLoaded || _allCoins.isEmpty;
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if (isFirstLoad) {
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_isLoading = true;
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_error = null;
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notifyListeners();
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}
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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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_platformCoins = _allCoins.where((c) => c.isPlatform == 1 && c.status == 1).toList();
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_nonPlatformCoins = _allCoins.where((c) => c.isPlatform != 1 && c.code != 'USDT').toList();
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_coinsLoaded = true;
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_error = null;
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} else {
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// 非首次加载时保留旧数据，仅记录错误
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if (!isFirstLoad && _allCoins.isNotEmpty) {
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_error = null;
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} else {
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_error = response.message;
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}
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}
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} catch (e) {
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// 非首次加载且有缓存数据时，不覆盖为错误状态
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if (!isFirstLoad && _allCoins.isNotEmpty) {
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_error = null;
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} else {
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_error = '加載失敗: $e';
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}
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}
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_isLoading = false;
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notifyListeners();
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}
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/// 根據代碼獲取幣種
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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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/// 重置加載狀態（用於退出登錄時）
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void resetLoadState() {
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_coinsLoaded = false;
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_allCoins = [];
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_error = null;
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notifyListeners();
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}
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}
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