Restore SEBPatch

SafeExamBrowser.Configuration/DataResources/FileResourceLoader.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 System.IO;
+using SafeExamBrowser.Configuration.Contracts;
+using SafeExamBrowser.Configuration.Contracts.DataResources;
+using SafeExamBrowser.Logging.Contracts;
+
+namespace SafeExamBrowser.Configuration.DataResources
+{
+	public class FileResourceLoader : IResourceLoader
+	{
+		private ILogger logger;
+
+		public FileResourceLoader(ILogger logger)
+		{
+			this.logger = logger;
+		}
+
+		public bool CanLoad(Uri resource)
+		{
+			var exists = resource.IsFile && File.Exists(resource.LocalPath);
+
+			if (exists)
+			{
+				logger.Debug($"Can load '{resource}' as it is an existing file.");
+			}
+			else
+			{
+				logger.Debug($"Can't load '{resource}' as it isn't an existing file.");
+			}
+
+			return exists;
+		}
+
+		public LoadStatus TryLoad(Uri resource, out Stream data)
+		{
+			logger.Debug($"Loading data from '{resource}'...");
+			data = new FileStream(resource.LocalPath, FileMode.Open, FileAccess.Read);
+			logger.Debug($"Created '{data}' for {data.Length / 1000.0} KB data in '{resource}'.");
+
+			return LoadStatus.Success;
+		}
+	}
+}