Restore SEBPatch

SafeExamBrowser.Server/Requests/AvailableExamsRequest.cs

@@ -0,0 +1,63 @@
+/*
+ * 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.Collections.Generic;
+using System.Net.Http;
+using SafeExamBrowser.Configuration.Contracts;
+using SafeExamBrowser.Logging.Contracts;
+using SafeExamBrowser.Server.Contracts.Data;
+using SafeExamBrowser.Server.Data;
+using SafeExamBrowser.Settings.Server;
+using SafeExamBrowser.SystemComponents.Contracts;
+
+namespace SafeExamBrowser.Server.Requests
+{
+	internal class AvailableExamsRequest : BaseRequest
+	{
+		private readonly AppConfig appConfig;
+		private readonly ISystemInfo systemInfo;
+		private readonly IUserInfo userInfo;
+
+		internal AvailableExamsRequest(
+			ApiVersion1 api,
+			AppConfig appConfig,
+			HttpClient httpClient,
+			ILogger logger,
+			Parser parser,
+			ServerSettings settings,
+			ISystemInfo systemInfo,
+			IUserInfo userInfo) : base(api, httpClient, logger, parser, settings)
+		{
+			this.appConfig = appConfig;
+			this.systemInfo = systemInfo;
+			this.userInfo = userInfo;
+		}
+
+		internal bool TryExecute(string examId, out IEnumerable<Exam> exams, out string message)
+		{
+			var clientInfo = $"client_id={userInfo.GetUserName()}&seb_machine_name={systemInfo.Name}";
+			var versionInfo = $"seb_os_name={systemInfo.OperatingSystemInfo}&seb_version={appConfig.ProgramInformationalVersion}";
+			var content = $"institutionId={settings.Institution}&{clientInfo}&{versionInfo}{(examId == default ? "" : $"&examId={examId}")}";
+
+			var success = TryExecute(HttpMethod.Post, api.HandshakeEndpoint, out var response, content, ContentType.URL_ENCODED, Authorization);
+
+			exams = default;
+			message = response.ToLogString();
+
+			if (success)
+			{
+				var hasExams = parser.TryParseExams(response.Content, out exams);
+				var hasToken = TryRetrieveConnectionToken(response);
+
+				success = hasExams && hasToken;
+			}
+
+			return success;
+		}
+	}
+}