Installing from CD reimplemented

OpenRA.FileFormats/InstallUtils.cs

@@ -0,0 +1,97 @@
+#region Copyright & License Information
+/*
+ * Copyright 2007-2011 The OpenRA Developers (see AUTHORS)
+ * This file is part of OpenRA, which is free software. It is made 
+ * available to you under the terms of the GNU General Public License
+ * as published by the Free Software Foundation. For more information,
+ * see COPYING.
+ */
+#endregion
+
+using System;
+using System.Collections.Generic;
+using System.IO;
+using ICSharpCode.SharpZipLib;
+using ICSharpCode.SharpZipLib.Zip;
+
+namespace OpenRA.FileFormats
+{
+	public static class InstallUtils
+	{
+		static IEnumerable<ZipEntry> GetEntries(this ZipInputStream z)
+		{
+			for (; ; )
+			{
+				var e = z.GetNextEntry();
+				if (e != null) yield return e; else break;
+			}
+		}
+			
+		public static void ExtractZip(this ZipInputStream z, string destPath, List<string> extracted, Action<string> Extracting)
+		{
+			foreach (var entry in z.GetEntries())
+			{
+				if (!entry.IsFile) continue;
+				
+				Extracting(entry.Name);
+				Directory.CreateDirectory(Path.Combine(destPath, Path.GetDirectoryName(entry.Name)));
+				var path = Path.Combine(destPath, entry.Name);
+				extracted.Add(path);
+				
+				using (var f = File.Create(path))
+				{
+					int bufSize = 2048;
+					byte[] buf = new byte[bufSize];
+					while ((bufSize = z.Read(buf, 0, buf.Length)) > 0)
+					f.Write(buf, 0, bufSize);
+				}
+			}
+			
+			z.Close();
+		}
+		
+		// TODO: The package should be mounted into its own context to avoid name collisions with installed files
+		public static bool ExtractFromPackage(string srcPath, string package, string[] files, string destPath, Action<string> onProgress, Action<string> onError)
+		{
+			if (!Directory.Exists(destPath))
+				Directory.CreateDirectory(destPath);
+			
+			if (!Directory.Exists(srcPath)) { onError("Cannot find "+package); return false; }
+			FileSystem.Mount(srcPath);
+			if (!FileSystem.Exists(package)) { onError("Cannot find "+package); return false; }
+			FileSystem.Mount(package);
+
+			foreach (string s in files)
+			{
+				var destFile = Path.Combine(destPath, s);
+				using (var sourceStream = FileSystem.Open(s))
+				using (var destStream = File.Create(destFile))
+				{
+					onProgress("Extracting "+s);
+					destStream.Write(sourceStream.ReadAllBytes());
+				}
+			}
+			
+			onProgress("Extraction complete");
+			return true;
+		}
+		
+		public static bool CopyFiles(string srcPath, string[] files, string destPath, Action<string> onProgress, Action<string> onError)
+		{
+			foreach (var file in files)
+			{
+				var fromPath = Path.Combine(srcPath, file);
+				if (!File.Exists(fromPath))
+				{
+					onError("Cannot find "+file);
+					return false;
+				}
+				var destFile = Path.GetFileName(file).ToLowerInvariant();
+				onProgress("Extracting "+destFile);
+				File.Copy(fromPath,	Path.Combine(destPath, destFile), true);
+			}
+			onProgress("Extraction complete");
+			return true;
+		}
+	}
+}