111

2026-04-21 08:12:17 +08:00
parent 5264043c21
commit 685202dd55
247 changed files with 18661 additions and 0 deletions
--- a/flutter_monisuo/lib/providers/trade_provider.dart
+++ b/flutter_monisuo/lib/providers/trade_provider.dart
@@ -0,0 +1,92 @@
+import 'dart:async';
+import 'package:flutter/material.dart';
+import '../data/models/coin.dart';
+import '../data/models/order_book.dart';
+import '../data/services/market_service.dart';
+import '../data/services/trade_service.dart';
+
+/// 交易頁狀態管理 — 輪詢價格 + 訂單簿
+class TradeProvider extends ChangeNotifier {
+  final MarketService _marketService;
+  // ignore: unused_field
+  final TradeService _tradeService;
+
+  TradeProvider(this._marketService, this._tradeService);
+
+  Coin? _selectedCoin;
+  OrderBookDepth _depth = const OrderBookDepth(asks: [], bids: [], spread: 0, spreadPercent: 0);
+  bool _isLoadingDepth = false;
+  String? _error;
+
+  Timer? _pollTimer;
+  static const _pollInterval = Duration(seconds: 5);
+
+  Coin? get selectedCoin => _selectedCoin;
+  OrderBookDepth get depth => _depth;
+  bool get isLoadingDepth => _isLoadingDepth;
+  String? get error => _error;
+
+  /// 实时模拟价格（从 depth 轮询获取）
+  double get currentPrice => _depth.currentPrice;
+  double get change24h => _depth.change24h;
+  double get high24h => _depth.high24h;
+  double get low24h => _depth.low24h;
+  double get volume24h => _depth.volume24h;
+
+  /// 交易时段状态
+  String get tradingStatus => _depth.tradingStatus;
+  double? get targetLow => _depth.targetLow;
+  double? get targetHigh => _depth.targetHigh;
+  double? get targetClose => _depth.targetClose;
+  bool get isTradable => tradingStatus == 'trading';
+
+  void selectCoin(Coin coin) {
+    if (_selectedCoin?.code == coin.code) return;
+    _selectedCoin = coin;
+    _depth = const OrderBookDepth(asks: [], bids: [], spread: 0, spreadPercent: 0);
+    _error = null;
+    notifyListeners();
+    startPolling();
+  }
+
+  void clearSelection() {
+    _selectedCoin = null;
+    _depth = const OrderBookDepth(asks: [], bids: [], spread: 0, spreadPercent: 0);
+    stopPolling();
+    notifyListeners();
+  }
+
+  void startPolling() {
+    stopPolling();
+    _fetchDepth();
+    _pollTimer = Timer.periodic(_pollInterval, (_) => _fetchDepth());
+  }
+
+  void stopPolling() {
+    _pollTimer?.cancel();
+    _pollTimer = null;
+  }
+
+  Future<void> _fetchDepth() async {
+    if (_selectedCoin == null) return;
+    final response = await _marketService.getDepth(_selectedCoin!.code);
+    if (!response.success || response.data == null) return;
+
+    _depth = OrderBookDepth.fromJson(response.data!);
+    notifyListeners();
+  }
+
+  /// 刷新幣種價格（從 MarketProvider 的列表中找到最新價）
+  void updateCoinPrice(Coin updatedCoin) {
+    if (_selectedCoin?.code == updatedCoin.code) {
+      _selectedCoin = updatedCoin;
+      notifyListeners();
+    }
+  }
+
+  @override
+  void dispose() {
+    stopPolling();
+    super.dispose();
+  }
+}