Add project files.

RHLauncher/UpdateUnpacker.cs

@@ -0,0 +1,74 @@
+using RHLauncher.Helper;
+
+namespace RHLauncher.RHLauncher
+{
+    public class UpdateUnpacker
+    {
+        public static async Task UnpackDownloadedFilesAsync(string installDir, IProgress<ProgressReport> progress, CancellationToken cancellationToken)
+        {
+            if (installDir == null)
+                throw new ArgumentNullException(nameof(installDir));
+            if (progress == null)
+                throw new ArgumentNullException(nameof(progress));
+
+            string archiveDir = Path.Combine(installDir, "archive");
+            string updateRootFolder = Path.Combine(installDir, "Update");
+
+            if (!Directory.Exists(archiveDir))
+            {
+                return;
+            }
+
+            if (!Directory.Exists(updateRootFolder))
+            {
+                Directory.CreateDirectory(updateRootFolder);
+            }
+
+            List<string> files = Directory.EnumerateFiles(archiveDir, "*.mip", SearchOption.AllDirectories)
+                .OrderBy(f => f, StringComparer.OrdinalIgnoreCase)
+                .ToList();
+            int count = files.Count;
+            int pos = 0;
+
+            await Task.Run(async () =>
+            {
+                foreach (string file in files)
+                {
+                    cancellationToken.ThrowIfCancellationRequested();
+
+                    string relativePath = Path.GetRelativePath(archiveDir, file);
+                    string outputPath = Path.Combine(updateRootFolder, relativePath.Substring(0, relativePath.Length - 4)); // Remove the ".mip" extension
+
+                    try
+                    {
+                        Directory.CreateDirectory(Path.GetDirectoryName(outputPath));
+                        await MIPDecoder.DecompressFileAsync(file, outputPath, cancellationToken);
+
+                        pos++;
+                        ProgressReporter.ReportInstallProgress(progress, LocalizedStrings.Unpacking, file, pos, count, cancellationToken);
+                    }
+                    catch (OperationCanceledException ex)
+                    {
+                        Logger.WriteLog($"Update unpack canceled: {ex.Message}");
+                    }
+                    catch (ArgumentException ex)
+                    {
+                        Logger.WriteLog($"An error occurred while unpacking: {file} {ex}");
+                        ProgressReporter.ReportErrorProgress(progress, ex.Message, cancellationToken);
+                    }
+                    catch (Exception ex)
+                    {
+                        Logger.WriteLog($"Error: {ex.Message} {ex.StackTrace} ");
+                        throw;
+                    }
+                }
+
+                ProgressReporter.ReportFinishedProgress(progress, cancellationToken);
+            }, cancellationToken);
+        }
+
+        
+
+
+    }
+}