405 lines
15 KiB
C#
405 lines
15 KiB
C#
using FATrace.WPLApp.Core;
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using Prism.Commands;
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using System;
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using System.Collections.ObjectModel;
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using System.Linq;
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using System.Threading.Tasks;
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using System.Windows.Threading;
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using FreeSql;
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using FATrace.Model;
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using FATrace.WPLApp.Services;
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using System.IO;
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using System.Windows;
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using System.Text;
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using Prism.Events;
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using FATrace.WPLApp.Events;
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using System.Threading;
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namespace FATrace.WPLApp.ViewModels
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{
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public class DashboardViewModel : NavigationViewModel
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{
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private readonly IFreeSql _fsql;
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private readonly ILogService _log;
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private readonly DataServices _data;
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private int _dashboardRefreshRequested;
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private int _dashboardRefreshLoopRunning;
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private DispatcherTimer _logTimer;
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private bool _initialized;
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private TextWriter _originalConsoleOut;
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private ConsoleInterceptWriter _consoleInterceptor;
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private readonly IEventAggregator _ea;
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public DashboardViewModel(IFreeSql fsql, ILogService log, DataServices data, IEventAggregator ea)
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{
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_fsql = fsql;
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_log = log;
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_data = data;
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_ea = ea;
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LiveMessages = new ObservableCollection<string>();
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RefreshCommand = new DelegateCommand(async () => await RefreshStatsAsync());
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ClearLogsCommand = new DelegateCommand(() => LiveMessages.Clear());
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PlcConnected = _data.PlcConnected;
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_data.PropertyChanged += (s, e) =>
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{
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if (e.PropertyName == nameof(DataServices.PlcConnected))
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{
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var val = _data.PlcConnected;
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if (Application.Current?.Dispatcher?.CheckAccess() == true)
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PlcConnected = val;
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else
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Application.Current?.Dispatcher?.BeginInvoke(new Action(() => PlcConnected = val));
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}
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};
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// 订阅产线信号事件，生成人类可读的运行消息
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_data.LineSglModel.WeightScanCodeHandle += (s, e) =>
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{
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var code = _data.WeightScanCode;
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if (Application.Current?.Dispatcher?.CheckAccess() == true)
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LatestWeightScanCode = code;
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else
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Application.Current?.Dispatcher?.BeginInvoke(new Action(() => LatestWeightScanCode = code));
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AppendLiveMessage($"称重扫码触发: {code}");
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};
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_data.LineSglModel.BoxSprayCodeReqHandle += (s, e) =>
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{
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var code = _data.BoxSprayCode;
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if (Application.Current?.Dispatcher?.CheckAccess() == true)
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LatestBoxSprayCode = code;
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else
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Application.Current?.Dispatcher?.BeginInvoke(new Action(() => LatestBoxSprayCode = code));
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//AppendLiveMessage("外箱喷码请求: 已向PLC下发喷码数据");
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AppendLiveMessage($"外箱喷码请求: 已向PLC下发喷码数据;{code}");
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};
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_data.LineSglModel.BoxScanCodeReqHandle += (s, e) =>
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{
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var code = _data.BoxScanCode;
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if (Application.Current?.Dispatcher?.CheckAccess() == true)
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LatestBoxScanCode = code;
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else
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Application.Current?.Dispatcher?.BeginInvoke(new Action(() => LatestBoxScanCode = code));
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AppendLiveMessage($"外箱扫码触发: {code}");
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};
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// 订阅外部刷新事件（来自 DataServices 的 BoxScanCode 完成后）
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try
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{
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EnsureDashboardRefreshSubscription();
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}
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catch (Exception ex)
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{
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_log?.Warn($"DashboardRefreshEvent 订阅失败: {ex.Message}");
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}
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}
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private void EnsureDashboardRefreshSubscription()
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{
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if (_dashEventToken != null) return;
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// 注意：Prism 默认 keepSubscriberReferenceAlive=false（弱引用）。
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// 若使用 lambda，目标可能是 closure 对象，存在被 GC 导致订阅失效的风险。
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// 这里使用具名方法 + keepSubscriberReferenceAlive=true，确保订阅稳定。
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_dashEventToken = _ea.GetEvent<DashboardRefreshEvent>()
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.Subscribe(OnDashboardRefreshEvent, ThreadOption.UIThread, true);
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}
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private void OnDashboardRefreshEvent(bool _)
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{
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RequestDashboardRefresh();
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}
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/// <summary>
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/// 触发一次 Dashboard 刷新（合并 + 互斥）：短时间多次触发只会串行执行，并在执行结束后最多再补跑一次。
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/// </summary>
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private void RequestDashboardRefresh()
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{
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// 标记有刷新请求
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Interlocked.Exchange(ref _dashboardRefreshRequested, 1);
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// 若刷新循环已在跑，则仅标记请求即可
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if (Interlocked.Exchange(ref _dashboardRefreshLoopRunning, 1) == 1)
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{
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return;
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}
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var dispatcher = Application.Current?.Dispatcher;
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if (dispatcher == null)
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{
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// 极少数场景（无 UI Dispatcher），直接后台跑
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_ = DashboardRefreshLoopAsync();
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return;
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}
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dispatcher.BeginInvoke(new Action(async () =>
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{
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try
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{
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await DashboardRefreshLoopAsync();
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}
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finally
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{
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Interlocked.Exchange(ref _dashboardRefreshLoopRunning, 0);
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// 如果在执行过程中又来了刷新请求，则再次启动一次循环（确保不漏刷新）
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if (Interlocked.Exchange(ref _dashboardRefreshRequested, 0) == 1)
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{
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RequestDashboardRefresh();
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}
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}
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}));
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}
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/// <summary>
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/// 在 UI 线程串行执行刷新，且合并多次触发。
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/// </summary>
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private async Task DashboardRefreshLoopAsync()
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{
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// 只要存在刷新请求，就执行一次刷新；过程中再来请求，会在下一轮继续跑
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while (Interlocked.Exchange(ref _dashboardRefreshRequested, 0) == 1)
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{
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try
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{
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await RefreshStatsAsync();
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}
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catch (Exception ex)
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{
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_log.Error($"DashboardRefreshEvent 刷新失败: {ex}");
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}
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}
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}
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#region Properties
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private double _todayWeight;
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public double TodayWeight { get => _todayWeight; set { _todayWeight = value; RaisePropertyChanged(); } }
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private double _monthWeight;
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public double MonthWeight { get => _monthWeight; set { _monthWeight = value; RaisePropertyChanged(); } }
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private double _yearWeight;
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public double YearWeight { get => _yearWeight; set { _yearWeight = value; RaisePropertyChanged(); } }
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private double _totalWeight;
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public double TotalWeight { get => _totalWeight; set { _totalWeight = value; RaisePropertyChanged(); } }
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private string _latestWeightScanCode;
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public string LatestWeightScanCode { get => _latestWeightScanCode; set { _latestWeightScanCode = value; RaisePropertyChanged(); } }
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private string _latestBoxScanCode;
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public string LatestBoxScanCode { get => _latestBoxScanCode; set { _latestBoxScanCode = value; RaisePropertyChanged(); } }
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private string _latestBoxSprayCode;
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/// <summary>
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/// 最近一次外箱喷码数据（即下发给 PLC 的源字符串）
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/// </summary>
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public string LatestBoxSprayCode { get => _latestBoxSprayCode; set { _latestBoxSprayCode = value; RaisePropertyChanged(); } }
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private bool _plcConnected;
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public bool PlcConnected { get => _plcConnected; set { _plcConnected = value; RaisePropertyChanged(); } }
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public ObservableCollection<string> LiveMessages { get; }
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#endregion
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#region Commands
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public DelegateCommand RefreshCommand { get; }
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public DelegateCommand ClearLogsCommand { get; }
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#endregion
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private void AppendLiveMessage(string message)
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{
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if (string.IsNullOrWhiteSpace(message)) return;
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var line = $"{DateTime.Now:HH:mm:ss} {message}";
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void add() => LiveMessages.Add(line);
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if (Application.Current?.Dispatcher?.CheckAccess() == true) add();
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else Application.Current?.Dispatcher?.BeginInvoke(new Action(add));
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// 限制最大条数，避免内存增长
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const int max = 500;
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void trim()
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{
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if (LiveMessages.Count > max)
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{
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while (LiveMessages.Count > max)
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LiveMessages.RemoveAt(0);
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}
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}
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if (Application.Current?.Dispatcher?.CheckAccess() == true) trim();
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else Application.Current?.Dispatcher?.BeginInvoke(new Action(trim));
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}
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private async Task RefreshStatsAsync()
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{
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try
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{
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var todayStart = DateTime.Today;
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var todayEnd = todayStart.AddDays(1).AddTicks(-1);
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var monthStart = new DateTime(DateTime.Today.Year, DateTime.Today.Month, 1);
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var monthEnd = monthStart.AddMonths(1).AddTicks(-1);
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var yearStart = new DateTime(DateTime.Today.Year, 1, 1);
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var yearEnd = yearStart.AddYears(1).AddTicks(-1);
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var ret = await Task.Run(() =>
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{
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double t = Convert.ToDouble(
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_fsql.Select<RawProUse>()
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.Where(a => a.WeightTime >= todayStart && a.WeightTime <= todayEnd)
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.Sum(a => a.Weight));
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double m = Convert.ToDouble(
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_fsql.Select<RawProUse>()
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.Where(a => a.WeightTime >= monthStart && a.WeightTime <= monthEnd)
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.Sum(a => a.Weight));
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double y = Convert.ToDouble(
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_fsql.Select<RawProUse>()
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.Where(a => a.WeightTime >= yearStart && a.WeightTime <= yearEnd)
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.Sum(a => a.Weight));
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double all = Convert.ToDouble(_fsql.Select<RawProUse>().Sum(a => a.Weight));
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return (t, m, y, all);
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});
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TodayWeight = ret.t;
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MonthWeight = ret.m;
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YearWeight = ret.y;
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TotalWeight = ret.all;
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}
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catch (Exception ex)
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{
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_log.Error($"Dashboard 统计刷新失败: {ex}");
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}
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}
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public override async void OnNavigatedTo(Prism.Regions.NavigationContext navigationContext)
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{
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try
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{
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EnsureDashboardRefreshSubscription();
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}
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catch (Exception ex)
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{
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_log?.Warn($"DashboardRefreshEvent OnNavigatedTo 订阅失败: {ex.Message}");
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}
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if (!_initialized)
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{
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_initialized = true;
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//StartLogTimer();
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await RefreshStatsAsync();
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// 初始化展示最近一次扫描值
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LatestWeightScanCode = _data.WeightScanCode;
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LatestBoxScanCode = _data.BoxScanCode;
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LatestBoxSprayCode = _data.BoxSprayCode;
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TryHookConsole();
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}
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}
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public override void OnNavigatedFrom(Prism.Regions.NavigationContext navigationContext)
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{
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if (_logTimer != null)
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{
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try { _logTimer.Stop(); } catch { }
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_logTimer = null;
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}
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UnhookConsole();
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try
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{
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if (_dashEventToken != null)
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{
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_ea.GetEvent<DashboardRefreshEvent>().Unsubscribe(_dashEventToken);
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_dashEventToken = null;
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}
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}
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catch (Exception ex)
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{
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_log?.Warn($"DashboardRefreshEvent 退订失败: {ex.Message}");
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}
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}
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private void TryHookConsole()
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{
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try
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{
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if (_consoleInterceptor != null) return;
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_originalConsoleOut = Console.Out;
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_consoleInterceptor = new ConsoleInterceptWriter(_originalConsoleOut, AppendLiveMessage);
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Console.SetOut(_consoleInterceptor);
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}
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catch { }
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}
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private void UnhookConsole()
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{
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try
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{
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if (_consoleInterceptor != null && _originalConsoleOut != null)
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{
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Console.SetOut(_originalConsoleOut);
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}
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}
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catch { }
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finally
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{
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_consoleInterceptor = null;
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_originalConsoleOut = null;
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}
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}
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private class ConsoleInterceptWriter : TextWriter
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{
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private readonly TextWriter _inner;
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private readonly Action<string> _onLine;
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private readonly StringWriter _buffer = new StringWriter();
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public ConsoleInterceptWriter(TextWriter inner, Action<string> onLine)
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{
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_inner = inner;
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_onLine = onLine;
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}
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public override Encoding Encoding => _inner.Encoding;
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public override void Write(char value)
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{
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_inner.Write(value);
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if (value == '\n')
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{
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var line = _buffer.ToString();
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_buffer.GetStringBuilder().Clear();
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if (!string.IsNullOrWhiteSpace(line)) _onLine(line.TrimEnd('\r'));
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}
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else
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{
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_buffer.Write(value);
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}
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}
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public override void Write(string value)
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{
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_inner.Write(value);
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if (value == null) return;
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foreach (var ch in value)
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{
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Write(ch);
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}
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}
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public override void WriteLine(string value)
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{
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_inner.WriteLine(value);
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if (!string.IsNullOrWhiteSpace(value)) _onLine(value);
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}
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}
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private SubscriptionToken _dashEventToken;
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}
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}
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