Restore SEBPatch

SafeExamBrowser.Core/Operations/DelegateOperation.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 SafeExamBrowser.Core.Contracts.OperationModel;
+using SafeExamBrowser.Core.Contracts.OperationModel.Events;
+
+namespace SafeExamBrowser.Core.Operations
+{
+	/// <summary>
+	/// A generic operation to allow for the (inline) definition of an operation via delegates. Useful if implementing a complete
+	/// <see cref="IOperation"/> would be an unnecessary overhead.
+	/// </summary>
+	public class DelegateOperation : IRepeatableOperation
+	{
+		private Action perform;
+		private Action repeat;
+		private Action revert;
+
+		public event ActionRequiredEventHandler ActionRequired { add { } remove { } }
+		public event StatusChangedEventHandler StatusChanged { add { } remove { } }
+
+		public DelegateOperation(Action perform, Action repeat = null, Action revert = null)
+		{
+			this.perform = perform;
+			this.repeat = repeat;
+			this.revert = revert;
+		}
+
+		public OperationResult Perform()
+		{
+			perform?.Invoke();
+
+			return OperationResult.Success;
+		}
+
+		public OperationResult Repeat()
+		{
+			repeat?.Invoke();
+
+			return OperationResult.Success;
+		}
+
+		public OperationResult Revert()
+		{
+			revert?.Invoke();
+
+			return OperationResult.Success;
+		}
+	}
+}