Add meeting inactivity safeguards

MeetingAssistant/Recording/WindowsMeetingInactivityPromptService.Windows.cs

@@ -4,7 +4,7 @@ using CommunityToolkit.WinUI.Notifications;
 
 namespace MeetingAssistant.Recording;
 
-public sealed class WindowsMeetingInactivityPromptService : IMeetingInactivityPromptService, IDisposable
+public sealed class WindowsMeetingInactivityPromptService : IMeetingInactivityPromptService, IHostedService, IDisposable
 {
     private const string NotificationSource = "meeting-inactivity-safeguard";
     private const string NotificationGroup = "meeting-inactivity";
@@ -39,6 +39,10 @@ public sealed class WindowsMeetingInactivityPromptService : IMeetingInactivityPr
             EnsureRegistered();
             var promptId = Guid.NewGuid().ToString("N");
             pendingPrompts[promptId] = new PendingPrompt(handleResponseAsync);
+            logger.LogInformation(
+                "Registered native Windows inactivity notification {PromptId} response callback at threshold {Threshold}",
+                promptId,
+                request.Threshold);
             var notification = BuildNotification(promptId, request);
             notification.Show(toast =>
             {
@@ -59,6 +63,23 @@ public sealed class WindowsMeetingInactivityPromptService : IMeetingInactivityPr
         return Task.CompletedTask;
     }
 
+    public Task StartAsync(CancellationToken cancellationToken)
+    {
+        if (!OperatingSystem.IsWindowsVersionAtLeast(10, 0, 17763))
+        {
+            logger.LogWarning("Windows app notifications require Windows 10 version 1809 or later");
+            return Task.CompletedTask;
+        }
+
+        EnsureRegistered();
+        return Task.CompletedTask;
+    }
+
+    public Task StopAsync(CancellationToken cancellationToken)
+    {
+        return Task.CompletedTask;
+    }
+
     public void Dispose()
     {
         if (!registered)
@@ -69,11 +90,10 @@ public sealed class WindowsMeetingInactivityPromptService : IMeetingInactivityPr
         try
         {
             ToastNotificationManagerCompat.OnActivated -= OnNotificationInvoked;
-            ToastNotificationManagerCompat.Uninstall();
         }
         catch (Exception exception)
         {
-            logger.LogWarning(exception, "Failed to unregister native Windows toast notifications");
+            logger.LogWarning(exception, "Failed to detach native Windows toast notification activation handler");
         }
     }
 
@@ -126,12 +146,31 @@ public sealed class WindowsMeetingInactivityPromptService : IMeetingInactivityPr
 
     private void OnNotificationInvoked(ToastNotificationActivatedEventArgsCompat args)
     {
-        var arguments = ParseArguments(args.Argument);
+        logger.LogInformation(
+            "Native Windows inactivity notification activation received with arguments {Arguments}",
+            args.Argument);
+
+        var arguments = NotificationActivationArguments.Parse(args.Argument);
         if (!TryGetArgument(arguments, "source", out var source) ||
-            !string.Equals(source, NotificationSource, StringComparison.OrdinalIgnoreCase) ||
-            !TryGetArgument(arguments, "promptId", out var promptId) ||
-            !pendingPrompts.TryRemove(promptId, out var pendingPrompt))
+            !string.Equals(source, NotificationSource, StringComparison.OrdinalIgnoreCase))
         {
+            logger.LogDebug(
+                "Ignoring native Windows notification activation for unrelated source {Source}",
+                source);
+            return;
+        }
+
+        if (!TryGetArgument(arguments, "promptId", out var promptId))
+        {
+            logger.LogWarning("Ignoring native Windows inactivity notification activation without prompt id");
+            return;
+        }
+
+        if (!pendingPrompts.TryRemove(promptId, out var pendingPrompt))
+        {
+            logger.LogWarning(
+                "Ignoring native Windows inactivity notification {PromptId} activation because no pending prompt callback exists",
+                promptId);
             return;
         }
 
@@ -159,31 +198,6 @@ public sealed class WindowsMeetingInactivityPromptService : IMeetingInactivityPr
         });
     }
 
-    private static IReadOnlyDictionary<string, string> ParseArguments(string argumentText)
-    {
-        if (string.IsNullOrWhiteSpace(argumentText))
-        {
-            return new Dictionary<string, string>();
-        }
-
-        var arguments = new Dictionary<string, string>(StringComparer.OrdinalIgnoreCase);
-        foreach (var pair in argumentText.Split('&', StringSplitOptions.RemoveEmptyEntries))
-        {
-            var separatorIndex = pair.IndexOf('=');
-            if (separatorIndex < 0)
-            {
-                arguments[Uri.UnescapeDataString(pair)] = "";
-                continue;
-            }
-
-            var key = Uri.UnescapeDataString(pair[..separatorIndex]);
-            var value = Uri.UnescapeDataString(pair[(separatorIndex + 1)..]);
-            arguments[key] = value;
-        }
-
-        return arguments;
-    }
-
     private static bool TryGetArgument(
         IReadOnlyDictionary<string, string> arguments,
         string key,