Restore SEBPatch

SafeExamBrowser.Proctoring/ProctoringController.cs

@@ -0,0 +1,211 @@
+/*
+ * 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.Collections.Generic;
+using KGySoft.CoreLibraries;
+using SafeExamBrowser.Browser.Contracts;
+using SafeExamBrowser.Configuration.Contracts;
+using SafeExamBrowser.Core.Contracts.Notifications;
+using SafeExamBrowser.I18n.Contracts;
+using SafeExamBrowser.Logging.Contracts;
+using SafeExamBrowser.Monitoring.Contracts.Applications;
+using SafeExamBrowser.Proctoring.Contracts;
+using SafeExamBrowser.Proctoring.Contracts.Events;
+using SafeExamBrowser.Server.Contracts;
+using SafeExamBrowser.Server.Contracts.Events.Proctoring;
+using SafeExamBrowser.Settings.Proctoring;
+using SafeExamBrowser.SystemComponents.Contracts;
+using SafeExamBrowser.UserInterface.Contracts;
+using SafeExamBrowser.WindowsApi.Contracts;
+
+namespace SafeExamBrowser.Proctoring
+{
+	public class ProctoringController : IProctoringController
+	{
+		private readonly ProctoringFactory factory;
+		private readonly IModuleLogger logger;
+		private readonly IServerProxy server;
+
+		private IEnumerable<ProctoringImplementation> implementations;
+
+		public bool IsHandRaised { get; private set; }
+		public IEnumerable<INotification> Notifications => new List<INotification>(implementations);
+
+		public event ProctoringEventHandler HandLowered;
+		public event ProctoringEventHandler HandRaised;
+		public event RemainingWorkUpdatedEventHandler RemainingWorkUpdated
+		{
+			add { implementations.ForEach(i => i.RemainingWorkUpdated += value); }
+			remove { implementations.ForEach(i => i.RemainingWorkUpdated -= value); }
+		}
+
+		public ProctoringController(
+			AppConfig appConfig,
+			IApplicationMonitor applicationMonitor,
+			IBrowserApplication browser,
+			IFileSystem fileSystem,
+			IModuleLogger logger,
+			INativeMethods nativeMethods,
+			IServerProxy server,
+			IText text,
+			IUserInterfaceFactory uiFactory)
+		{
+			this.logger = logger;
+			this.server = server;
+
+			factory = new ProctoringFactory(appConfig, applicationMonitor, browser, fileSystem, logger, nativeMethods, text, uiFactory);
+			implementations = new List<ProctoringImplementation>();
+		}
+
+		public void ExecuteRemainingWork()
+		{
+			foreach (var implementation in implementations)
+			{
+				try
+				{
+					implementation.ExecuteRemainingWork();
+				}
+				catch (Exception e)
+				{
+					logger.Error($"Failed to execute remaining work for '{implementation.Name}'!", e);
+				}
+			}
+		}
+
+		public bool HasRemainingWork()
+		{
+			var hasWork = false;
+
+			foreach (var implementation in implementations)
+			{
+				try
+				{
+					if (implementation.HasRemainingWork())
+					{
+						hasWork = true;
+					}
+				}
+				catch (Exception e)
+				{
+					logger.Error($"Failed to check whether has remaining work for '{implementation.Name}'!", e);
+				}
+			}
+
+			return hasWork;
+		}
+
+		public void Initialize(ProctoringSettings settings)
+		{
+			implementations = factory.CreateAllActive(settings);
+
+			server.HandConfirmed += Server_HandConfirmed;
+			server.ProctoringConfigurationReceived += Server_ProctoringConfigurationReceived;
+			server.ProctoringInstructionReceived += Server_ProctoringInstructionReceived;
+
+			foreach (var implementation in implementations)
+			{
+				try
+				{
+					implementation.Initialize();
+				}
+				catch (Exception e)
+				{
+					logger.Error($"Failed to initialize proctoring implementation '{implementation.Name}'!", e);
+				}
+			}
+		}
+
+		public void LowerHand()
+		{
+			var response = server.LowerHand();
+
+			if (response.Success)
+			{
+				IsHandRaised = false;
+				HandLowered?.Invoke();
+
+				logger.Info("Hand lowered.");
+			}
+			else
+			{
+				logger.Error($"Failed to send lower hand notification to server! Message: {response.Message}.");
+			}
+		}
+
+		public void RaiseHand(string message = null)
+		{
+			var response = server.RaiseHand(message);
+
+			if (response.Success)
+			{
+				IsHandRaised = true;
+				HandRaised?.Invoke();
+
+				logger.Info("Hand raised.");
+			}
+			else
+			{
+				logger.Error($"Failed to send raise hand notification to server! Message: {response.Message}.");
+			}
+		}
+
+		public void Terminate()
+		{
+			foreach (var implementation in implementations)
+			{
+				try
+				{
+					implementation.Terminate();
+				}
+				catch (Exception e)
+				{
+					logger.Error($"Failed to terminate proctoring implementation '{implementation.Name}'!", e);
+				}
+			}
+		}
+
+		private void Server_HandConfirmed()
+		{
+			logger.Info("Hand confirmation received.");
+
+			IsHandRaised = false;
+			HandLowered?.Invoke();
+		}
+
+		private void Server_ProctoringConfigurationReceived(bool allowChat, bool receiveAudio, bool receiveVideo)
+		{
+			foreach (var implementation in implementations)
+			{
+				try
+				{
+					implementation.ProctoringConfigurationReceived(allowChat, receiveAudio, receiveVideo);
+				}
+				catch (Exception e)
+				{
+					logger.Error($"Failed to update proctoring configuration for '{implementation.Name}'!", e);
+				}
+			}
+		}
+
+		private void Server_ProctoringInstructionReceived(InstructionEventArgs args)
+		{
+			foreach (var implementation in implementations)
+			{
+				try
+				{
+					implementation.ProctoringInstructionReceived(args);
+				}
+				catch (Exception e)
+				{
+					logger.Error($"Failed to process proctoring instruction for '{implementation.Name}'!", e);
+				}
+			}
+		}
+	}
+}