Restore SEBPatch

SafeExamBrowser.Browser/Content/ContentLoader.cs

@@ -0,0 +1,119 @@
+/*
+ * 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.IO;
+using System.Reflection;
+using SafeExamBrowser.I18n.Contracts;
+
+namespace SafeExamBrowser.Browser.Content
+{
+	internal class ContentLoader
+	{
+		private readonly IText text;
+
+		private string api;
+		private string clipboard;
+		private string pageZoom;
+
+		internal ContentLoader(IText text)
+		{
+			this.text = text;
+		}
+
+		internal string LoadApi(string browserExamKey, string configurationKey, string version)
+		{
+			if (api == default)
+			{
+				var assembly = Assembly.GetAssembly(typeof(ContentLoader));
+				var path = $"{typeof(ContentLoader).Namespace}.Api.js";
+
+				using (var stream = assembly.GetManifestResourceStream(path))
+				using (var reader = new StreamReader(stream))
+				{
+					api = reader.ReadToEnd();
+				}
+			}
+
+			var js = api;
+
+			js = js.Replace("%%_BEK_%%", browserExamKey);
+			js = js.Replace("%%_CK_%%", configurationKey);
+			js = js.Replace("%%_VERSION_%%", version);
+
+			return js;
+		}
+
+		internal string LoadBlockedContent()
+		{
+			var assembly = Assembly.GetAssembly(typeof(ContentLoader));
+			var path = $"{typeof(ContentLoader).Namespace}.BlockedContent.html";
+
+			using (var stream = assembly.GetManifestResourceStream(path))
+			using (var reader = new StreamReader(stream))
+			{
+				var html = reader.ReadToEnd();
+
+				html = html.Replace("%%MESSAGE%%", text.Get(TextKey.Browser_BlockedContentMessage));
+
+				return html;
+			}
+		}
+
+		internal string LoadBlockedPage()
+		{
+			var assembly = Assembly.GetAssembly(typeof(ContentLoader));
+			var path = $"{typeof(ContentLoader).Namespace}.BlockedPage.html";
+
+			using (var stream = assembly.GetManifestResourceStream(path))
+			using (var reader = new StreamReader(stream))
+			{
+				var html = reader.ReadToEnd();
+
+				html = html.Replace("%%BACK_BUTTON%%", text.Get(TextKey.Browser_BlockedPageButton));
+				html = html.Replace("%%MESSAGE%%", text.Get(TextKey.Browser_BlockedPageMessage));
+				html = html.Replace("%%TITLE%%", text.Get(TextKey.Browser_BlockedPageTitle));
+
+				return html;
+			}
+		}
+
+		internal string LoadClipboard()
+		{
+			if (clipboard == default)
+			{
+				var assembly = Assembly.GetAssembly(typeof(ContentLoader));
+				var path = $"{typeof(ContentLoader).Namespace}.Clipboard.js";
+
+				using (var stream = assembly.GetManifestResourceStream(path))
+				using (var reader = new StreamReader(stream))
+				{
+					clipboard = reader.ReadToEnd();
+				}
+			}
+
+			return clipboard;
+		}
+
+		internal string LoadPageZoom()
+		{
+			if (pageZoom == default)
+			{
+				var assembly = Assembly.GetAssembly(typeof(ContentLoader));
+				var path = $"{typeof(ContentLoader).Namespace}.PageZoom.js";
+
+				using (var stream = assembly.GetManifestResourceStream(path))
+				using (var reader = new StreamReader(stream))
+				{
+					pageZoom = reader.ReadToEnd();
+				}
+			}
+
+			return pageZoom;
+		}
+	}
+}