/* * Copyright (c) 2021 ETH Zürich, Educational Development and Technology (LET) * * 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 SafeExamBrowser.Core.Contracts.OperationModel; using SafeExamBrowser.Core.Contracts.OperationModel.Events; using SafeExamBrowser.I18n.Contracts; using SafeExamBrowser.Logging.Contracts; using SafeExamBrowser.Monitoring.Contracts.Display; using SafeExamBrowser.Runtime.Operations.Events; using SafeExamBrowser.UserInterface.Contracts.MessageBox; namespace SafeExamBrowser.Runtime.Operations { internal class DisplayMonitorOperation : SessionOperation { private readonly IDisplayMonitor displayMonitor; private readonly ILogger logger; public override event ActionRequiredEventHandler ActionRequired; public override event StatusChangedEventHandler StatusChanged; public DisplayMonitorOperation(IDisplayMonitor displayMonitor, ILogger logger, SessionContext context) : base(context) { this.displayMonitor = displayMonitor; this.logger = logger; } public override OperationResult Perform() { return CheckDisplayConfiguration(); } public override OperationResult Repeat() { return CheckDisplayConfiguration(); } public override OperationResult Revert() { return OperationResult.Success; } private OperationResult CheckDisplayConfiguration() { var args = new MessageEventArgs { Action = MessageBoxAction.Ok, Icon = MessageBoxIcon.Error, Message = TextKey.MessageBox_DisplayConfigurationError, Title = TextKey.MessageBox_DisplayConfigurationErrorTitle }; var result = OperationResult.Aborted; logger.Info("Validating display configuration..."); StatusChanged?.Invoke(TextKey.OperationStatus_ValidateDisplayConfiguration); if (displayMonitor.IsAllowedConfiguration(Context.Next.Settings.Display)) { logger.Info("Display configuration is allowed."); result = OperationResult.Success; } else { logger.Error("Display configuration is not allowed!"); ActionRequired?.Invoke(args); } return result; } } }