Restore SEBPatch

SafeExamBrowser.Monitoring/System/Components/SystemEvents.cs

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+/*
+ * Copyright (c) 2024 ETH Zürich, IT Services
+ * 
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+using System;
+using System.Threading.Tasks;
+using Microsoft.Win32;
+using SafeExamBrowser.Logging.Contracts;
+using SafeExamBrowser.Monitoring.Contracts.System.Events;
+
+namespace SafeExamBrowser.Monitoring.System.Components
+{
+	internal class SystemEvents
+	{
+		private readonly ILogger logger;
+
+		internal event SessionChangedEventHandler SessionChanged;
+
+		internal SystemEvents(ILogger logger)
+		{
+			this.logger = logger;
+		}
+
+		internal void StartMonitoring()
+		{
+			Microsoft.Win32.SystemEvents.EventsThreadShutdown += SystemEvents_EventsThreadShutdown;
+			Microsoft.Win32.SystemEvents.InstalledFontsChanged += SystemEvents_InstalledFontsChanged;
+			Microsoft.Win32.SystemEvents.PowerModeChanged += SystemEvents_PowerModeChanged;
+			Microsoft.Win32.SystemEvents.SessionEnded += SystemEvents_SessionEnded;
+			Microsoft.Win32.SystemEvents.SessionEnding += SystemEvents_SessionEnding;
+			Microsoft.Win32.SystemEvents.SessionSwitch += SystemEvents_SessionChanged;
+			Microsoft.Win32.SystemEvents.TimeChanged += SystemEvents_TimeChanged;
+			Microsoft.Win32.SystemEvents.UserPreferenceChanged += SystemEvents_UserPreferenceChanged;
+
+			logger.Info("Started monitoring system events.");
+		}
+
+		internal void StopMonitoring()
+		{
+			Microsoft.Win32.SystemEvents.EventsThreadShutdown -= SystemEvents_EventsThreadShutdown;
+			Microsoft.Win32.SystemEvents.InstalledFontsChanged -= SystemEvents_InstalledFontsChanged;
+			Microsoft.Win32.SystemEvents.PowerModeChanged -= SystemEvents_PowerModeChanged;
+			Microsoft.Win32.SystemEvents.SessionEnded -= SystemEvents_SessionEnded;
+			Microsoft.Win32.SystemEvents.SessionEnding -= SystemEvents_SessionEnding;
+			Microsoft.Win32.SystemEvents.SessionSwitch -= SystemEvents_SessionChanged;
+			Microsoft.Win32.SystemEvents.TimeChanged -= SystemEvents_TimeChanged;
+			Microsoft.Win32.SystemEvents.UserPreferenceChanged -= SystemEvents_UserPreferenceChanged;
+
+			logger.Info("Stopped monitoring system events.");
+		}
+
+		private void SystemEvents_EventsThreadShutdown(object sender, EventArgs e)
+		{
+			
+		}
+
+		private void SystemEvents_InstalledFontsChanged(object sender, EventArgs e)
+		{
+			
+		}
+
+		private void SystemEvents_PowerModeChanged(object sender, PowerModeChangedEventArgs e)
+		{
+			
+		}
+
+		private void SystemEvents_SessionEnded(object sender, SessionEndedEventArgs e)
+		{
+			
+		}
+
+		private void SystemEvents_SessionEnding(object sender, SessionEndingEventArgs e)
+		{
+			
+		}
+
+		private void SystemEvents_SessionChanged(object sender, SessionSwitchEventArgs e)
+		{
+			
+		}
+
+		private void SystemEvents_TimeChanged(object sender, EventArgs e)
+		{
+			
+		}
+
+		private void SystemEvents_UserPreferenceChanged(object sender, UserPreferenceChangedEventArgs e)
+		{
+			
+		}
+	}
+}