96 lines
3.2 KiB
C#
96 lines
3.2 KiB
C#
/*
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* Copyright (c) 2022 ETH Zürich, Educational Development and Technology (LET)
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*/
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using System;
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using System.Threading.Tasks;
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using Microsoft.Win32;
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using SafeExamBrowser.Logging.Contracts;
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using SafeExamBrowser.Monitoring.Contracts.System;
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using SafeExamBrowser.Monitoring.Contracts.System.Events;
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namespace SafeExamBrowser.Monitoring.System
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{
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public class SystemMonitor : ISystemMonitor
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{
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private readonly ILogger logger;
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public event SessionSwitchedEventHandler SessionSwitched;
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public SystemMonitor(ILogger logger)
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{
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this.logger = logger;
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}
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public void Start()
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{
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SystemEvents.EventsThreadShutdown += SystemEvents_EventsThreadShutdown;
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SystemEvents.InstalledFontsChanged += SystemEvents_InstalledFontsChanged;
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SystemEvents.PowerModeChanged += SystemEvents_PowerModeChanged;
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SystemEvents.SessionEnded += SystemEvents_SessionEnded;
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SystemEvents.SessionEnding += SystemEvents_SessionEnding;
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SystemEvents.SessionSwitch += SystemEvents_SessionSwitch;
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SystemEvents.TimeChanged += SystemEvents_TimeChanged;
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SystemEvents.UserPreferenceChanged += SystemEvents_UserPreferenceChanged;
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logger.Info("Started monitoring the operating system.");
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}
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public void Stop()
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{
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SystemEvents.EventsThreadShutdown -= SystemEvents_EventsThreadShutdown;
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SystemEvents.InstalledFontsChanged -= SystemEvents_InstalledFontsChanged;
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SystemEvents.PowerModeChanged -= SystemEvents_PowerModeChanged;
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SystemEvents.SessionEnded -= SystemEvents_SessionEnded;
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SystemEvents.SessionEnding -= SystemEvents_SessionEnding;
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SystemEvents.SessionSwitch -= SystemEvents_SessionSwitch;
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SystemEvents.TimeChanged -= SystemEvents_TimeChanged;
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SystemEvents.UserPreferenceChanged -= SystemEvents_UserPreferenceChanged;
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logger.Info("Stopped monitoring the operating system.");
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}
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private void SystemEvents_EventsThreadShutdown(object sender, EventArgs e)
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{
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logger.Warn("System event thread is about to be terminated!");
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}
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private void SystemEvents_InstalledFontsChanged(object sender, EventArgs e)
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{
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logger.Info("Installed fonts changed.");
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}
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private void SystemEvents_PowerModeChanged(object sender, PowerModeChangedEventArgs e)
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{
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logger.Info($"Power mode changed: {e.Mode}");
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}
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private void SystemEvents_SessionEnded(object sender, SessionEndedEventArgs e)
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{
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logger.Warn($"User session ended! Reason: {e.Reason}");
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}
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private void SystemEvents_SessionEnding(object sender, SessionEndingEventArgs e)
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{
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logger.Warn($"User session is ending! Reason: {e.Reason}");
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}
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private void SystemEvents_SessionSwitch(object sender, SessionSwitchEventArgs e)
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{
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logger.Info($"User session switch detected! Reason: {e.Reason}");
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Task.Run(() => SessionSwitched?.Invoke());
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}
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private void SystemEvents_TimeChanged(object sender, EventArgs e)
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{
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logger.Info("Time changed.");
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}
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private void SystemEvents_UserPreferenceChanged(object sender, UserPreferenceChangedEventArgs e)
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{
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logger.Info($"User preference changed. Category: {e.Category}");
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}
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}
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}
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