Restore SEBPatch

SafeExamBrowser.Proctoring/ScreenProctoring/Service/ServiceProxy.cs

@@ -0,0 +1,129 @@
+/*
+ * 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.Net.Http;
+using SafeExamBrowser.Logging.Contracts;
+using SafeExamBrowser.Proctoring.ScreenProctoring.Data;
+using SafeExamBrowser.Proctoring.ScreenProctoring.Imaging;
+using SafeExamBrowser.Proctoring.ScreenProctoring.Service.Requests;
+
+namespace SafeExamBrowser.Proctoring.ScreenProctoring.Service
+{
+	internal class ServiceProxy
+	{
+		private readonly Api api;
+		private readonly ILogger logger;
+		private readonly Parser parser;
+
+		private HttpClient httpClient;
+
+		internal bool IsConnected => SessionId != default;
+		internal string SessionId { get; set; }
+
+		internal ServiceProxy(ILogger logger)
+		{
+			this.api = new Api();
+			this.logger = logger;
+			this.parser = new Parser(logger);
+		}
+
+		internal ServiceResponse Connect(string clientId, string clientSecret, string serviceUrl)
+		{
+			httpClient = new HttpClient
+			{
+				BaseAddress = new Uri(serviceUrl),
+				Timeout = TimeSpan.FromSeconds(10)
+			};
+
+			var request = new OAuth2TokenRequest(api, httpClient, logger, parser);
+			var success = request.TryExecute(clientId, clientSecret, out var message);
+
+			if (success)
+			{
+				logger.Info("Successfully connected to service.");
+			}
+			else
+			{
+				logger.Error("Failed to connect to service!");
+			}
+
+			return new ServiceResponse(success, message);
+		}
+
+		internal ServiceResponse CreateSession(string groupId)
+		{
+			var request = new CreateSessionRequest(api, httpClient, logger, parser);
+			var success = request.TryExecute(groupId, out var message, out var sessionId);
+
+			if (success)
+			{
+				SessionId = sessionId;
+				logger.Info("Successfully created session.");
+			}
+			else
+			{
+				logger.Error("Failed to create session!");
+			}
+
+			return new ServiceResponse(success, message);
+		}
+
+		internal ServiceResponse<int> GetHealth()
+		{
+			var request = new HealthRequest(api, httpClient, logger, parser);
+			var success = request.TryExecute(out var health, out var message);
+
+			if (success)
+			{
+				logger.Info($"Successfully queried health (value: {health}).");
+			}
+			else
+			{
+				logger.Warn("Failed to query health!");
+			}
+
+			return new ServiceResponse<int>(success, health, message);
+		}
+
+		internal ServiceResponse<int> Send(MetaData metaData, ScreenShot screenShot)
+		{
+			var request = new ScreenShotRequest(api, httpClient, logger, parser);
+			var success = request.TryExecute(metaData, screenShot, SessionId, out var health, out var message);
+
+			if (success)
+			{
+				logger.Info($"Successfully sent screen shot ({screenShot}).");
+			}
+			else
+			{
+				logger.Error("Failed to send screen shot!");
+			}
+
+			return new ServiceResponse<int>(success, health, message);
+		}
+
+		internal ServiceResponse TerminateSession()
+		{
+			var request = new TerminateSessionRequest(api, httpClient, logger, parser);
+			var success = request.TryExecute(SessionId, out var message);
+
+			if (success)
+			{
+				SessionId = default;
+				logger.Info("Successfully terminated session.");
+			}
+			else
+			{
+				logger.Error("Failed to terminate session!");
+			}
+
+			return new ServiceResponse(success, message);
+		}
+	}
+}