Restore SEBPatch

SafeExamBrowser.Core.Contracts/OperationModel/IOperation.cs

@@ -0,0 +1,38 @@
+/*
+ * 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 SafeExamBrowser.Core.Contracts.OperationModel.Events;
+
+namespace SafeExamBrowser.Core.Contracts.OperationModel
+{
+	/// <summary>
+	/// Defines an operation which will be executed as part of an <see cref="IOperationSequence"/>.
+	/// </summary>
+	public interface IOperation
+	{
+		/// <summary>
+		/// Event fired when the operation requires user interaction.
+		/// </summary>
+		event ActionRequiredEventHandler ActionRequired;
+
+		/// <summary>
+		/// Event fired when the status of the operation has changed.
+		/// </summary>
+		event StatusChangedEventHandler StatusChanged;
+
+		/// <summary>
+		/// Performs the operation.
+		/// </summary>
+		OperationResult Perform();
+
+		/// <summary>
+		/// Reverts all changes made when executing the operation.
+		/// </summary>
+		OperationResult Revert();
+	}
+}