feat(ui): add current-launch logs tab

Add Live Chat and Logs tabs to the non-edit left panel. Expose a bounded process-local AppLog feed so the newest messages appear first without importing earlier startup.log contents or changing file logging. Ref: https://obsproject.com/forum/resources/understanding-obs-studio-log.473
2026-11-02 11:06:43 -08:00
parent 20f059422b
commit 9fa06c67c2
11 changed files with 305 additions and 77 deletions
@@ -0,0 +1,95 @@
+using System.Collections.ObjectModel;
+using System.Linq;
+using System.Windows.Threading;
+using ytLive.Helpers;
+
+namespace ytLive.ViewModels;
+
+public partial class MainViewModel
+{
+    private const int VisibleLogEntryLimit = 500;
+    private readonly ObservableCollection<AppLogEntry> _currentLaunchLogEntries = new();
+    private DispatcherTimer? _currentLaunchLogTimer;
+    private long _lastCurrentLaunchLogSequence;
+    private bool _isLogsTabSelected;
+
+    public ObservableCollection<AppLogEntry> CurrentLaunchLogEntries => _currentLaunchLogEntries;
+
+    public bool IsLiveChatTabSelected
+    {
+        get => !_isLogsTabSelected;
+        set
+        {
+            if (value)
+                SelectLogsTab(false);
+            else if (!_isLogsTabSelected)
+                OnPropertyChanged(nameof(IsLiveChatTabSelected));
+        }
+    }
+
+    public bool IsLogsTabSelected
+    {
+        get => _isLogsTabSelected;
+        set
+        {
+            if (value)
+                SelectLogsTab(true);
+            else if (_isLogsTabSelected)
+                OnPropertyChanged(nameof(IsLogsTabSelected));
+        }
+    }
+
+    private void InitializeCurrentLaunchLogs()
+    {
+        foreach (var entry in AppLog.SnapshotCurrentLaunch()
+                     .OrderByDescending(entry => entry.Sequence)
+                     .Take(VisibleLogEntryLimit))
+            _currentLaunchLogEntries.Add(entry);
+
+        _lastCurrentLaunchLogSequence = _currentLaunchLogEntries.FirstOrDefault()?.Sequence ?? 0;
+        _currentLaunchLogTimer = new DispatcherTimer { Interval = TimeSpan.FromMilliseconds(250) };
+        _currentLaunchLogTimer.Tick += (_, _) => RefreshCurrentLaunchLogs();
+    }
+
+    private void SelectLogsTab(bool selected)
+    {
+        if (_isLogsTabSelected == selected)
+        {
+            OnPropertyChanged(nameof(IsLiveChatTabSelected));
+            OnPropertyChanged(nameof(IsLogsTabSelected));
+            return;
+        }
+
+        _isLogsTabSelected = selected;
+        OnPropertyChanged(nameof(IsLiveChatTabSelected));
+        OnPropertyChanged(nameof(IsLogsTabSelected));
+        if (selected)
+        {
+            RefreshCurrentLaunchLogs();
+            _currentLaunchLogTimer?.Start();
+        }
+        else
+        {
+            _currentLaunchLogTimer?.Stop();
+        }
+    }
+
+    internal void RefreshCurrentLaunchLogs()
+    {
+        var newEntries = AppLog.SnapshotCurrentLaunch()
+            .Where(entry => entry.Sequence > _lastCurrentLaunchLogSequence)
+            .OrderBy(entry => entry.Sequence)
+            .ToArray();
+
+        foreach (var entry in newEntries)
+        {
+            _currentLaunchLogEntries.Insert(0, entry);
+            if (_currentLaunchLogEntries.Count > VisibleLogEntryLimit)
+                _currentLaunchLogEntries.RemoveAt(_currentLaunchLogEntries.Count - 1);
+            _lastCurrentLaunchLogSequence = entry.Sequence;
+        }
+    }
+
+    private void StopCurrentLaunchLogFeed()
+        => _currentLaunchLogTimer?.Stop();
+}