Restore SEBPatch

SafeExamBrowser.Core.Contracts/OperationModel/IRepeatableOperationSequence.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/.
+ */
+
+namespace SafeExamBrowser.Core.Contracts.OperationModel
+{
+	/// <summary>
+	/// A sequence of <see cref="IRepeatableOperation"/> which can be used for repeatable sequential procedures.
+	/// 
+	/// Exemplary execution order for a sequence initialized with operations A, B, C, D:
+	/// 
+	/// <see cref="TryRepeat()"/>: A -> B -> C -> D.
+	/// </summary>
+	public interface IRepeatableOperationSequence : IOperationSequence
+	{
+		/// <summary>
+		/// Tries to repeat the operations of this sequence according to their initialized order. If any operation fails, the already
+		/// repeated operations will not be reverted.
+		/// </summary>
+		OperationResult TryRepeat();
+	}
+}