Add cross-platform OPC UA client stack: shared library, CLI tool, and Avalonia UI
Implements Client.Shared (IOpcUaClientService with connection lifecycle, failover, browse, read/write, subscriptions, alarms, history, redundancy), Client.CLI (8 CliFx commands mirroring tools/opcuacli-dotnet), and Client.UI (Avalonia desktop app with tree browser, read/write, subscriptions, alarms, and history tabs). All three target .NET 10 and are covered by 249 unit tests. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
This commit is contained in:
Joseph Doherty
@@ -0,0 +1,38 @@
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using CommunityToolkit.Mvvm.ComponentModel;
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namespace ZB.MOM.WW.LmxOpcUa.Client.UI.ViewModels;
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/// <summary>
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/// Represents a single alarm event row.
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/// </summary>
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public partial class AlarmEventViewModel : ObservableObject
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{
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public string SourceName { get; }
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public string ConditionName { get; }
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public ushort Severity { get; }
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public string Message { get; }
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public bool Retain { get; }
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public bool ActiveState { get; }
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public bool AckedState { get; }
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public DateTime Time { get; }
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public AlarmEventViewModel(
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string sourceName,
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string conditionName,
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ushort severity,
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string message,
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bool retain,
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bool activeState,
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bool ackedState,
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DateTime time)
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{
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SourceName = sourceName;
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ConditionName = conditionName;
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Severity = severity;
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Message = message;
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Retain = retain;
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ActiveState = activeState;
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AckedState = ackedState;
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Time = time;
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}
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}
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128
src/ZB.MOM.WW.LmxOpcUa.Client.UI/ViewModels/AlarmsViewModel.cs
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128
src/ZB.MOM.WW.LmxOpcUa.Client.UI/ViewModels/AlarmsViewModel.cs
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@@ -0,0 +1,128 @@
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using System.Collections.ObjectModel;
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using CommunityToolkit.Mvvm.ComponentModel;
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using CommunityToolkit.Mvvm.Input;
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using Opc.Ua;
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using ZB.MOM.WW.LmxOpcUa.Client.Shared;
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using ZB.MOM.WW.LmxOpcUa.Client.Shared.Models;
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using ZB.MOM.WW.LmxOpcUa.Client.UI.Services;
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namespace ZB.MOM.WW.LmxOpcUa.Client.UI.ViewModels;
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/// <summary>
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/// ViewModel for the alarms panel.
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/// </summary>
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public partial class AlarmsViewModel : ObservableObject
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{
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private readonly IOpcUaClientService _service;
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private readonly IUiDispatcher _dispatcher;
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/// <summary>Received alarm events.</summary>
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public ObservableCollection<AlarmEventViewModel> AlarmEvents { get; } = new();
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[ObservableProperty]
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private string? _monitoredNodeIdText;
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[ObservableProperty]
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private int _interval = 1000;
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[ObservableProperty]
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[NotifyCanExecuteChangedFor(nameof(SubscribeCommand))]
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[NotifyCanExecuteChangedFor(nameof(UnsubscribeCommand))]
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[NotifyCanExecuteChangedFor(nameof(RefreshCommand))]
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private bool _isSubscribed;
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[ObservableProperty]
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[NotifyCanExecuteChangedFor(nameof(SubscribeCommand))]
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[NotifyCanExecuteChangedFor(nameof(UnsubscribeCommand))]
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[NotifyCanExecuteChangedFor(nameof(RefreshCommand))]
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private bool _isConnected;
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public AlarmsViewModel(IOpcUaClientService service, IUiDispatcher dispatcher)
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{
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_service = service;
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_dispatcher = dispatcher;
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_service.AlarmEvent += OnAlarmEvent;
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}
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private void OnAlarmEvent(object? sender, AlarmEventArgs e)
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{
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_dispatcher.Post(() =>
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{
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AlarmEvents.Add(new AlarmEventViewModel(
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e.SourceName,
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e.ConditionName,
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e.Severity,
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e.Message,
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e.Retain,
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e.ActiveState,
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e.AckedState,
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e.Time));
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});
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}
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private bool CanSubscribe() => IsConnected && !IsSubscribed;
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[RelayCommand(CanExecute = nameof(CanSubscribe))]
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private async Task SubscribeAsync()
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{
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try
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{
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NodeId? sourceNodeId = string.IsNullOrWhiteSpace(MonitoredNodeIdText)
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? null
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: NodeId.Parse(MonitoredNodeIdText);
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await _service.SubscribeAlarmsAsync(sourceNodeId, Interval);
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IsSubscribed = true;
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}
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catch
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{
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// Subscribe failed
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}
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}
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private bool CanUnsubscribe() => IsConnected && IsSubscribed;
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[RelayCommand(CanExecute = nameof(CanUnsubscribe))]
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private async Task UnsubscribeAsync()
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{
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try
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{
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await _service.UnsubscribeAlarmsAsync();
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IsSubscribed = false;
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}
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catch
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{
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// Unsubscribe failed
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}
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}
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[RelayCommand(CanExecute = nameof(CanUnsubscribe))]
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private async Task RefreshAsync()
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{
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try
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{
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await _service.RequestConditionRefreshAsync();
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}
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catch
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{
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// Refresh failed
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}
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}
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/// <summary>
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/// Clears alarm events and resets state.
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/// </summary>
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public void Clear()
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{
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AlarmEvents.Clear();
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IsSubscribed = false;
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}
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/// <summary>
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/// Unhooks event handlers from the service.
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/// </summary>
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public void Teardown()
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{
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_service.AlarmEvent -= OnAlarmEvent;
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}
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}
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@@ -0,0 +1,55 @@
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using System.Collections.ObjectModel;
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using CommunityToolkit.Mvvm.ComponentModel;
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using ZB.MOM.WW.LmxOpcUa.Client.Shared;
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using ZB.MOM.WW.LmxOpcUa.Client.UI.Services;
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namespace ZB.MOM.WW.LmxOpcUa.Client.UI.ViewModels;
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/// <summary>
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/// ViewModel for the OPC UA browse tree panel.
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/// </summary>
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public partial class BrowseTreeViewModel : ObservableObject
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{
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private readonly IOpcUaClientService _service;
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private readonly IUiDispatcher _dispatcher;
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/// <summary>Top-level nodes in the browse tree.</summary>
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public ObservableCollection<TreeNodeViewModel> RootNodes { get; } = new();
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public BrowseTreeViewModel(IOpcUaClientService service, IUiDispatcher dispatcher)
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{
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_service = service;
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_dispatcher = dispatcher;
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}
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/// <summary>
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/// Loads root nodes by browsing with a null parent.
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/// </summary>
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public async Task LoadRootsAsync()
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{
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var results = await _service.BrowseAsync(null);
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_dispatcher.Post(() =>
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{
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RootNodes.Clear();
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foreach (var result in results)
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{
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RootNodes.Add(new TreeNodeViewModel(
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result.NodeId,
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result.DisplayName,
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result.NodeClass,
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result.HasChildren,
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_service,
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_dispatcher));
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}
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});
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}
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/// <summary>
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/// Clears all root nodes from the tree.
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/// </summary>
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public void Clear()
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{
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RootNodes.Clear();
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}
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}
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@@ -0,0 +1,22 @@
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using CommunityToolkit.Mvvm.ComponentModel;
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namespace ZB.MOM.WW.LmxOpcUa.Client.UI.ViewModels;
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/// <summary>
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/// Represents a single historical value row.
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/// </summary>
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public partial class HistoryValueViewModel : ObservableObject
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{
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public string Value { get; }
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public string Status { get; }
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public string SourceTimestamp { get; }
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public string ServerTimestamp { get; }
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public HistoryValueViewModel(string value, string status, string sourceTimestamp, string serverTimestamp)
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{
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Value = value;
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Status = status;
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SourceTimestamp = sourceTimestamp;
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ServerTimestamp = serverTimestamp;
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}
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}
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140
src/ZB.MOM.WW.LmxOpcUa.Client.UI/ViewModels/HistoryViewModel.cs
Normal file
140
src/ZB.MOM.WW.LmxOpcUa.Client.UI/ViewModels/HistoryViewModel.cs
Normal file
@@ -0,0 +1,140 @@
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using System.Collections.ObjectModel;
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using CommunityToolkit.Mvvm.ComponentModel;
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using CommunityToolkit.Mvvm.Input;
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using Opc.Ua;
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using ZB.MOM.WW.LmxOpcUa.Client.Shared;
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using ZB.MOM.WW.LmxOpcUa.Client.Shared.Models;
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using ZB.MOM.WW.LmxOpcUa.Client.UI.Services;
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namespace ZB.MOM.WW.LmxOpcUa.Client.UI.ViewModels;
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/// <summary>
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/// ViewModel for the history panel.
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/// </summary>
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public partial class HistoryViewModel : ObservableObject
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{
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private readonly IOpcUaClientService _service;
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private readonly IUiDispatcher _dispatcher;
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[ObservableProperty]
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[NotifyCanExecuteChangedFor(nameof(ReadHistoryCommand))]
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private string? _selectedNodeId;
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[ObservableProperty]
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private DateTimeOffset _startTime = DateTimeOffset.UtcNow.AddHours(-1);
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[ObservableProperty]
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private DateTimeOffset _endTime = DateTimeOffset.UtcNow;
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[ObservableProperty]
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private int _maxValues = 1000;
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[ObservableProperty]
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private AggregateType? _selectedAggregateType;
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/// <summary>Available aggregate types (null means "Raw").</summary>
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public IReadOnlyList<AggregateType?> AggregateTypes { get; } = new AggregateType?[]
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{
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null,
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AggregateType.Average,
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AggregateType.Minimum,
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AggregateType.Maximum,
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AggregateType.Count,
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AggregateType.Start,
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AggregateType.End
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};
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[ObservableProperty]
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private double _intervalMs = 3600000;
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public bool IsAggregateRead => SelectedAggregateType != null;
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[ObservableProperty]
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private bool _isLoading;
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[ObservableProperty]
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[NotifyCanExecuteChangedFor(nameof(ReadHistoryCommand))]
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private bool _isConnected;
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/// <summary>History read results.</summary>
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public ObservableCollection<HistoryValueViewModel> Results { get; } = new();
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public HistoryViewModel(IOpcUaClientService service, IUiDispatcher dispatcher)
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{
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_service = service;
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_dispatcher = dispatcher;
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}
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partial void OnSelectedAggregateTypeChanged(AggregateType? value)
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{
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OnPropertyChanged(nameof(IsAggregateRead));
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}
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private bool CanReadHistory() => IsConnected && !string.IsNullOrEmpty(SelectedNodeId);
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[RelayCommand(CanExecute = nameof(CanReadHistory))]
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private async Task ReadHistoryAsync()
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{
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if (string.IsNullOrEmpty(SelectedNodeId)) return;
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IsLoading = true;
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_dispatcher.Post(() => Results.Clear());
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try
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{
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var nodeId = NodeId.Parse(SelectedNodeId);
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IReadOnlyList<DataValue> values;
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if (SelectedAggregateType != null)
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{
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values = await _service.HistoryReadAggregateAsync(
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nodeId,
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StartTime.UtcDateTime,
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EndTime.UtcDateTime,
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SelectedAggregateType.Value,
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IntervalMs);
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}
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else
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{
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values = await _service.HistoryReadRawAsync(
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nodeId,
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StartTime.UtcDateTime,
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EndTime.UtcDateTime,
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MaxValues);
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}
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_dispatcher.Post(() =>
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{
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foreach (var dv in values)
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{
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Results.Add(new HistoryValueViewModel(
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dv.Value?.ToString() ?? "(null)",
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dv.StatusCode.ToString(),
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dv.SourceTimestamp.ToString("O"),
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dv.ServerTimestamp.ToString("O")));
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}
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});
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}
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catch (Exception ex)
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{
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_dispatcher.Post(() =>
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{
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Results.Add(new HistoryValueViewModel(
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$"Error: {ex.Message}", string.Empty, string.Empty, string.Empty));
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});
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}
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finally
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{
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_dispatcher.Post(() => IsLoading = false);
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}
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}
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/// <summary>
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/// Clears results and resets state.
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/// </summary>
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public void Clear()
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{
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Results.Clear();
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SelectedNodeId = null;
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}
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}
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@@ -0,0 +1,198 @@
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using CommunityToolkit.Mvvm.ComponentModel;
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using CommunityToolkit.Mvvm.Input;
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using ZB.MOM.WW.LmxOpcUa.Client.Shared;
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using ZB.MOM.WW.LmxOpcUa.Client.Shared.Models;
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using ZB.MOM.WW.LmxOpcUa.Client.UI.Services;
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namespace ZB.MOM.WW.LmxOpcUa.Client.UI.ViewModels;
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/// <summary>
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/// Main window ViewModel coordinating all panels.
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/// </summary>
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public partial class MainWindowViewModel : ObservableObject
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{
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private readonly IOpcUaClientService _service;
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private readonly IUiDispatcher _dispatcher;
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[ObservableProperty]
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private string _endpointUrl = "opc.tcp://localhost:4840";
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[ObservableProperty]
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private string? _username;
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[ObservableProperty]
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private string? _password;
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[ObservableProperty]
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private SecurityMode _selectedSecurityMode = SecurityMode.None;
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/// <summary>All available security modes.</summary>
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public IReadOnlyList<SecurityMode> SecurityModes { get; } = Enum.GetValues<SecurityMode>();
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[ObservableProperty]
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[NotifyCanExecuteChangedFor(nameof(ConnectCommand))]
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[NotifyCanExecuteChangedFor(nameof(DisconnectCommand))]
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private ConnectionState _connectionState = ConnectionState.Disconnected;
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public bool IsConnected => ConnectionState == ConnectionState.Connected;
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[ObservableProperty]
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private TreeNodeViewModel? _selectedTreeNode;
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|
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[ObservableProperty]
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private RedundancyInfo? _redundancyInfo;
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[ObservableProperty]
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private string _statusMessage = "Disconnected";
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[ObservableProperty]
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private string _sessionLabel = string.Empty;
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[ObservableProperty]
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private int _subscriptionCount;
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public BrowseTreeViewModel BrowseTree { get; }
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public ReadWriteViewModel ReadWrite { get; }
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public SubscriptionsViewModel Subscriptions { get; }
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public AlarmsViewModel Alarms { get; }
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public HistoryViewModel History { get; }
|
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public MainWindowViewModel(IOpcUaClientServiceFactory factory, IUiDispatcher dispatcher)
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{
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_service = factory.Create();
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_dispatcher = dispatcher;
|
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|
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BrowseTree = new BrowseTreeViewModel(_service, dispatcher);
|
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ReadWrite = new ReadWriteViewModel(_service, dispatcher);
|
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Subscriptions = new SubscriptionsViewModel(_service, dispatcher);
|
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Alarms = new AlarmsViewModel(_service, dispatcher);
|
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History = new HistoryViewModel(_service, dispatcher);
|
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|
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_service.ConnectionStateChanged += OnConnectionStateChanged;
|
||||
}
|
||||
|
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private void OnConnectionStateChanged(object? sender, ConnectionStateChangedEventArgs e)
|
||||
{
|
||||
_dispatcher.Post(() =>
|
||||
{
|
||||
ConnectionState = e.NewState;
|
||||
});
|
||||
}
|
||||
|
||||
partial void OnConnectionStateChanged(ConnectionState value)
|
||||
{
|
||||
OnPropertyChanged(nameof(IsConnected));
|
||||
|
||||
var connected = value == ConnectionState.Connected;
|
||||
ReadWrite.IsConnected = connected;
|
||||
Subscriptions.IsConnected = connected;
|
||||
Alarms.IsConnected = connected;
|
||||
History.IsConnected = connected;
|
||||
|
||||
switch (value)
|
||||
{
|
||||
case ConnectionState.Connected:
|
||||
StatusMessage = $"Connected to {EndpointUrl}";
|
||||
break;
|
||||
case ConnectionState.Reconnecting:
|
||||
StatusMessage = "Reconnecting...";
|
||||
break;
|
||||
case ConnectionState.Connecting:
|
||||
StatusMessage = "Connecting...";
|
||||
break;
|
||||
case ConnectionState.Disconnected:
|
||||
StatusMessage = "Disconnected";
|
||||
SessionLabel = string.Empty;
|
||||
RedundancyInfo = null;
|
||||
BrowseTree.Clear();
|
||||
ReadWrite.Clear();
|
||||
Subscriptions.Clear();
|
||||
Alarms.Clear();
|
||||
History.Clear();
|
||||
SubscriptionCount = 0;
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
partial void OnSelectedTreeNodeChanged(TreeNodeViewModel? value)
|
||||
{
|
||||
ReadWrite.SelectedNodeId = value?.NodeId;
|
||||
History.SelectedNodeId = value?.NodeId;
|
||||
}
|
||||
|
||||
private bool CanConnect() => ConnectionState == ConnectionState.Disconnected;
|
||||
|
||||
[RelayCommand(CanExecute = nameof(CanConnect))]
|
||||
private async Task ConnectAsync()
|
||||
{
|
||||
try
|
||||
{
|
||||
ConnectionState = ConnectionState.Connecting;
|
||||
StatusMessage = "Connecting...";
|
||||
|
||||
var settings = new ConnectionSettings
|
||||
{
|
||||
EndpointUrl = EndpointUrl,
|
||||
Username = Username,
|
||||
Password = Password,
|
||||
SecurityMode = SelectedSecurityMode
|
||||
};
|
||||
settings.Validate();
|
||||
|
||||
var info = await _service.ConnectAsync(settings);
|
||||
|
||||
_dispatcher.Post(() =>
|
||||
{
|
||||
ConnectionState = ConnectionState.Connected;
|
||||
SessionLabel = $"{info.ServerName} | Session: {info.SessionName} ({info.SessionId})";
|
||||
});
|
||||
|
||||
// Load redundancy info
|
||||
try
|
||||
{
|
||||
var redundancy = await _service.GetRedundancyInfoAsync();
|
||||
_dispatcher.Post(() => RedundancyInfo = redundancy);
|
||||
}
|
||||
catch
|
||||
{
|
||||
// Redundancy info not available
|
||||
}
|
||||
|
||||
// Load root nodes
|
||||
await BrowseTree.LoadRootsAsync();
|
||||
}
|
||||
catch (Exception ex)
|
||||
{
|
||||
_dispatcher.Post(() =>
|
||||
{
|
||||
ConnectionState = ConnectionState.Disconnected;
|
||||
StatusMessage = $"Connection failed: {ex.Message}";
|
||||
});
|
||||
}
|
||||
}
|
||||
|
||||
private bool CanDisconnect() => ConnectionState == ConnectionState.Connected
|
||||
|| ConnectionState == ConnectionState.Reconnecting;
|
||||
|
||||
[RelayCommand(CanExecute = nameof(CanDisconnect))]
|
||||
private async Task DisconnectAsync()
|
||||
{
|
||||
try
|
||||
{
|
||||
Subscriptions.Teardown();
|
||||
Alarms.Teardown();
|
||||
await _service.DisconnectAsync();
|
||||
}
|
||||
catch
|
||||
{
|
||||
// Best-effort disconnect
|
||||
}
|
||||
finally
|
||||
{
|
||||
_dispatcher.Post(() =>
|
||||
{
|
||||
ConnectionState = ConnectionState.Disconnected;
|
||||
});
|
||||
}
|
||||
}
|
||||
}
|
||||
@@ -0,0 +1,136 @@
|
||||
using CommunityToolkit.Mvvm.ComponentModel;
|
||||
using CommunityToolkit.Mvvm.Input;
|
||||
using Opc.Ua;
|
||||
using ZB.MOM.WW.LmxOpcUa.Client.Shared;
|
||||
using ZB.MOM.WW.LmxOpcUa.Client.UI.Services;
|
||||
|
||||
namespace ZB.MOM.WW.LmxOpcUa.Client.UI.ViewModels;
|
||||
|
||||
/// <summary>
|
||||
/// ViewModel for the read/write panel.
|
||||
/// </summary>
|
||||
public partial class ReadWriteViewModel : ObservableObject
|
||||
{
|
||||
private readonly IOpcUaClientService _service;
|
||||
private readonly IUiDispatcher _dispatcher;
|
||||
|
||||
[ObservableProperty]
|
||||
[NotifyCanExecuteChangedFor(nameof(ReadCommand))]
|
||||
[NotifyCanExecuteChangedFor(nameof(WriteCommand))]
|
||||
private string? _selectedNodeId;
|
||||
|
||||
[ObservableProperty]
|
||||
private string? _currentValue;
|
||||
|
||||
[ObservableProperty]
|
||||
private string? _currentStatus;
|
||||
|
||||
[ObservableProperty]
|
||||
private string? _sourceTimestamp;
|
||||
|
||||
[ObservableProperty]
|
||||
private string? _serverTimestamp;
|
||||
|
||||
[ObservableProperty]
|
||||
private string? _writeValue;
|
||||
|
||||
[ObservableProperty]
|
||||
private string? _writeStatus;
|
||||
|
||||
[ObservableProperty]
|
||||
[NotifyCanExecuteChangedFor(nameof(ReadCommand))]
|
||||
[NotifyCanExecuteChangedFor(nameof(WriteCommand))]
|
||||
private bool _isConnected;
|
||||
|
||||
public bool IsNodeSelected => !string.IsNullOrEmpty(SelectedNodeId);
|
||||
|
||||
public ReadWriteViewModel(IOpcUaClientService service, IUiDispatcher dispatcher)
|
||||
{
|
||||
_service = service;
|
||||
_dispatcher = dispatcher;
|
||||
}
|
||||
|
||||
partial void OnSelectedNodeIdChanged(string? value)
|
||||
{
|
||||
OnPropertyChanged(nameof(IsNodeSelected));
|
||||
if (!string.IsNullOrEmpty(value) && IsConnected)
|
||||
{
|
||||
_ = ExecuteReadAsync();
|
||||
}
|
||||
}
|
||||
|
||||
private bool CanReadOrWrite() => IsConnected && !string.IsNullOrEmpty(SelectedNodeId);
|
||||
|
||||
[RelayCommand(CanExecute = nameof(CanReadOrWrite))]
|
||||
private async Task ReadAsync()
|
||||
{
|
||||
await ExecuteReadAsync();
|
||||
}
|
||||
|
||||
private async Task ExecuteReadAsync()
|
||||
{
|
||||
if (string.IsNullOrEmpty(SelectedNodeId)) return;
|
||||
|
||||
try
|
||||
{
|
||||
var nodeId = NodeId.Parse(SelectedNodeId);
|
||||
var dataValue = await _service.ReadValueAsync(nodeId);
|
||||
|
||||
_dispatcher.Post(() =>
|
||||
{
|
||||
CurrentValue = dataValue.Value?.ToString() ?? "(null)";
|
||||
CurrentStatus = dataValue.StatusCode.ToString();
|
||||
SourceTimestamp = dataValue.SourceTimestamp.ToString("O");
|
||||
ServerTimestamp = dataValue.ServerTimestamp.ToString("O");
|
||||
});
|
||||
}
|
||||
catch (Exception ex)
|
||||
{
|
||||
_dispatcher.Post(() =>
|
||||
{
|
||||
CurrentValue = null;
|
||||
CurrentStatus = $"Error: {ex.Message}";
|
||||
SourceTimestamp = null;
|
||||
ServerTimestamp = null;
|
||||
});
|
||||
}
|
||||
}
|
||||
|
||||
[RelayCommand(CanExecute = nameof(CanReadOrWrite))]
|
||||
private async Task WriteAsync()
|
||||
{
|
||||
if (string.IsNullOrEmpty(SelectedNodeId) || WriteValue == null) return;
|
||||
|
||||
try
|
||||
{
|
||||
var nodeId = NodeId.Parse(SelectedNodeId);
|
||||
var statusCode = await _service.WriteValueAsync(nodeId, WriteValue);
|
||||
|
||||
_dispatcher.Post(() =>
|
||||
{
|
||||
WriteStatus = statusCode.ToString();
|
||||
});
|
||||
}
|
||||
catch (Exception ex)
|
||||
{
|
||||
_dispatcher.Post(() =>
|
||||
{
|
||||
WriteStatus = $"Error: {ex.Message}";
|
||||
});
|
||||
}
|
||||
}
|
||||
|
||||
/// <summary>
|
||||
/// Clears all displayed values.
|
||||
/// </summary>
|
||||
public void Clear()
|
||||
{
|
||||
SelectedNodeId = null;
|
||||
CurrentValue = null;
|
||||
CurrentStatus = null;
|
||||
SourceTimestamp = null;
|
||||
ServerTimestamp = null;
|
||||
WriteValue = null;
|
||||
WriteStatus = null;
|
||||
}
|
||||
}
|
||||
@@ -0,0 +1,30 @@
|
||||
using CommunityToolkit.Mvvm.ComponentModel;
|
||||
|
||||
namespace ZB.MOM.WW.LmxOpcUa.Client.UI.ViewModels;
|
||||
|
||||
/// <summary>
|
||||
/// Represents a single active subscription row.
|
||||
/// </summary>
|
||||
public partial class SubscriptionItemViewModel : ObservableObject
|
||||
{
|
||||
/// <summary>The monitored NodeId.</summary>
|
||||
public string NodeId { get; }
|
||||
|
||||
/// <summary>The subscription interval in milliseconds.</summary>
|
||||
public int IntervalMs { get; }
|
||||
|
||||
[ObservableProperty]
|
||||
private string? _value;
|
||||
|
||||
[ObservableProperty]
|
||||
private string? _status;
|
||||
|
||||
[ObservableProperty]
|
||||
private string? _timestamp;
|
||||
|
||||
public SubscriptionItemViewModel(string nodeId, int intervalMs)
|
||||
{
|
||||
NodeId = nodeId;
|
||||
IntervalMs = intervalMs;
|
||||
}
|
||||
}
|
||||
@@ -0,0 +1,133 @@
|
||||
using System.Collections.ObjectModel;
|
||||
using CommunityToolkit.Mvvm.ComponentModel;
|
||||
using CommunityToolkit.Mvvm.Input;
|
||||
using Opc.Ua;
|
||||
using ZB.MOM.WW.LmxOpcUa.Client.Shared;
|
||||
using ZB.MOM.WW.LmxOpcUa.Client.Shared.Models;
|
||||
using ZB.MOM.WW.LmxOpcUa.Client.UI.Services;
|
||||
|
||||
namespace ZB.MOM.WW.LmxOpcUa.Client.UI.ViewModels;
|
||||
|
||||
/// <summary>
|
||||
/// ViewModel for the subscriptions panel.
|
||||
/// </summary>
|
||||
public partial class SubscriptionsViewModel : ObservableObject
|
||||
{
|
||||
private readonly IOpcUaClientService _service;
|
||||
private readonly IUiDispatcher _dispatcher;
|
||||
|
||||
/// <summary>Currently active subscriptions.</summary>
|
||||
public ObservableCollection<SubscriptionItemViewModel> ActiveSubscriptions { get; } = new();
|
||||
|
||||
[ObservableProperty]
|
||||
[NotifyCanExecuteChangedFor(nameof(AddSubscriptionCommand))]
|
||||
private string? _newNodeIdText;
|
||||
|
||||
[ObservableProperty]
|
||||
private int _newInterval = 1000;
|
||||
|
||||
[ObservableProperty]
|
||||
[NotifyCanExecuteChangedFor(nameof(AddSubscriptionCommand))]
|
||||
[NotifyCanExecuteChangedFor(nameof(RemoveSubscriptionCommand))]
|
||||
private bool _isConnected;
|
||||
|
||||
[ObservableProperty]
|
||||
private int _subscriptionCount;
|
||||
|
||||
[ObservableProperty]
|
||||
[NotifyCanExecuteChangedFor(nameof(RemoveSubscriptionCommand))]
|
||||
private SubscriptionItemViewModel? _selectedSubscription;
|
||||
|
||||
public SubscriptionsViewModel(IOpcUaClientService service, IUiDispatcher dispatcher)
|
||||
{
|
||||
_service = service;
|
||||
_dispatcher = dispatcher;
|
||||
_service.DataChanged += OnDataChanged;
|
||||
}
|
||||
|
||||
private void OnDataChanged(object? sender, DataChangedEventArgs e)
|
||||
{
|
||||
_dispatcher.Post(() =>
|
||||
{
|
||||
foreach (var item in ActiveSubscriptions)
|
||||
{
|
||||
if (item.NodeId == e.NodeId)
|
||||
{
|
||||
item.Value = e.Value.Value?.ToString() ?? "(null)";
|
||||
item.Status = e.Value.StatusCode.ToString();
|
||||
item.Timestamp = e.Value.SourceTimestamp.ToString("O");
|
||||
}
|
||||
}
|
||||
});
|
||||
}
|
||||
|
||||
private bool CanAddSubscription() => IsConnected && !string.IsNullOrWhiteSpace(NewNodeIdText);
|
||||
|
||||
[RelayCommand(CanExecute = nameof(CanAddSubscription))]
|
||||
private async Task AddSubscriptionAsync()
|
||||
{
|
||||
if (string.IsNullOrWhiteSpace(NewNodeIdText)) return;
|
||||
|
||||
var nodeIdStr = NewNodeIdText;
|
||||
var interval = NewInterval;
|
||||
|
||||
try
|
||||
{
|
||||
var nodeId = NodeId.Parse(nodeIdStr);
|
||||
await _service.SubscribeAsync(nodeId, interval);
|
||||
|
||||
_dispatcher.Post(() =>
|
||||
{
|
||||
ActiveSubscriptions.Add(new SubscriptionItemViewModel(nodeIdStr, interval));
|
||||
SubscriptionCount = ActiveSubscriptions.Count;
|
||||
});
|
||||
}
|
||||
catch
|
||||
{
|
||||
// Subscription failed; no item added
|
||||
}
|
||||
}
|
||||
|
||||
private bool CanRemoveSubscription() => IsConnected && SelectedSubscription != null;
|
||||
|
||||
[RelayCommand(CanExecute = nameof(CanRemoveSubscription))]
|
||||
private async Task RemoveSubscriptionAsync()
|
||||
{
|
||||
if (SelectedSubscription == null) return;
|
||||
|
||||
var item = SelectedSubscription;
|
||||
|
||||
try
|
||||
{
|
||||
var nodeId = NodeId.Parse(item.NodeId);
|
||||
await _service.UnsubscribeAsync(nodeId);
|
||||
|
||||
_dispatcher.Post(() =>
|
||||
{
|
||||
ActiveSubscriptions.Remove(item);
|
||||
SubscriptionCount = ActiveSubscriptions.Count;
|
||||
});
|
||||
}
|
||||
catch
|
||||
{
|
||||
// Unsubscribe failed
|
||||
}
|
||||
}
|
||||
|
||||
/// <summary>
|
||||
/// Clears all subscriptions and resets state.
|
||||
/// </summary>
|
||||
public void Clear()
|
||||
{
|
||||
ActiveSubscriptions.Clear();
|
||||
SubscriptionCount = 0;
|
||||
}
|
||||
|
||||
/// <summary>
|
||||
/// Unhooks event handlers from the service.
|
||||
/// </summary>
|
||||
public void Teardown()
|
||||
{
|
||||
_service.DataChanged -= OnDataChanged;
|
||||
}
|
||||
}
|
||||
122
src/ZB.MOM.WW.LmxOpcUa.Client.UI/ViewModels/TreeNodeViewModel.cs
Normal file
122
src/ZB.MOM.WW.LmxOpcUa.Client.UI/ViewModels/TreeNodeViewModel.cs
Normal file
@@ -0,0 +1,122 @@
|
||||
using System.Collections.ObjectModel;
|
||||
using CommunityToolkit.Mvvm.ComponentModel;
|
||||
using Opc.Ua;
|
||||
using ZB.MOM.WW.LmxOpcUa.Client.Shared;
|
||||
using ZB.MOM.WW.LmxOpcUa.Client.UI.Services;
|
||||
|
||||
namespace ZB.MOM.WW.LmxOpcUa.Client.UI.ViewModels;
|
||||
|
||||
/// <summary>
|
||||
/// Represents a single node in the OPC UA browse tree with lazy-load support.
|
||||
/// </summary>
|
||||
public partial class TreeNodeViewModel : ObservableObject
|
||||
{
|
||||
private static readonly TreeNodeViewModel PlaceholderSentinel = new();
|
||||
|
||||
private readonly IOpcUaClientService? _service;
|
||||
private readonly IUiDispatcher? _dispatcher;
|
||||
private bool _hasLoadedChildren;
|
||||
|
||||
/// <summary>The string NodeId of this node.</summary>
|
||||
public string NodeId { get; }
|
||||
|
||||
/// <summary>The display name shown in the tree.</summary>
|
||||
public string DisplayName { get; }
|
||||
|
||||
/// <summary>The OPC UA node class (Object, Variable, etc.).</summary>
|
||||
public string NodeClass { get; }
|
||||
|
||||
/// <summary>Whether this node has child references.</summary>
|
||||
public bool HasChildren { get; }
|
||||
|
||||
/// <summary>Child nodes (may contain a placeholder sentinel before first expand).</summary>
|
||||
public ObservableCollection<TreeNodeViewModel> Children { get; } = new();
|
||||
|
||||
[ObservableProperty]
|
||||
private bool _isExpanded;
|
||||
|
||||
[ObservableProperty]
|
||||
private bool _isLoading;
|
||||
|
||||
/// <summary>
|
||||
/// Private constructor for the placeholder sentinel only.
|
||||
/// </summary>
|
||||
private TreeNodeViewModel()
|
||||
{
|
||||
NodeId = string.Empty;
|
||||
DisplayName = "Loading...";
|
||||
NodeClass = string.Empty;
|
||||
HasChildren = false;
|
||||
}
|
||||
|
||||
public TreeNodeViewModel(
|
||||
string nodeId,
|
||||
string displayName,
|
||||
string nodeClass,
|
||||
bool hasChildren,
|
||||
IOpcUaClientService service,
|
||||
IUiDispatcher dispatcher)
|
||||
{
|
||||
NodeId = nodeId;
|
||||
DisplayName = displayName;
|
||||
NodeClass = nodeClass;
|
||||
HasChildren = hasChildren;
|
||||
_service = service;
|
||||
_dispatcher = dispatcher;
|
||||
|
||||
if (hasChildren)
|
||||
{
|
||||
Children.Add(PlaceholderSentinel);
|
||||
}
|
||||
}
|
||||
|
||||
partial void OnIsExpandedChanged(bool value)
|
||||
{
|
||||
if (value && !_hasLoadedChildren && HasChildren)
|
||||
{
|
||||
_ = LoadChildrenAsync();
|
||||
}
|
||||
}
|
||||
|
||||
private async Task LoadChildrenAsync()
|
||||
{
|
||||
if (_service == null || _dispatcher == null) return;
|
||||
|
||||
_hasLoadedChildren = true;
|
||||
IsLoading = true;
|
||||
|
||||
try
|
||||
{
|
||||
var nodeId = Opc.Ua.NodeId.Parse(NodeId);
|
||||
var results = await _service.BrowseAsync(nodeId);
|
||||
|
||||
_dispatcher.Post(() =>
|
||||
{
|
||||
Children.Clear();
|
||||
foreach (var result in results)
|
||||
{
|
||||
Children.Add(new TreeNodeViewModel(
|
||||
result.NodeId,
|
||||
result.DisplayName,
|
||||
result.NodeClass,
|
||||
result.HasChildren,
|
||||
_service,
|
||||
_dispatcher));
|
||||
}
|
||||
});
|
||||
}
|
||||
catch
|
||||
{
|
||||
_dispatcher.Post(() => Children.Clear());
|
||||
}
|
||||
finally
|
||||
{
|
||||
_dispatcher.Post(() => IsLoading = false);
|
||||
}
|
||||
}
|
||||
|
||||
/// <summary>
|
||||
/// Returns whether this node instance is the placeholder sentinel.
|
||||
/// </summary>
|
||||
internal bool IsPlaceholder => ReferenceEquals(this, PlaceholderSentinel);
|
||||
}
|
||||
Reference in New Issue
Block a user