add export

NResLib/NResExporter.cs

@@ -0,0 +1,38 @@
+namespace NResLib;
+
+public class NResExporter
+{
+    public static void Export(NResArchive archive, string directory, string nResPath)
+    {
+        var openedFileName = Path.GetFileName(nResPath)!;
+        var targetDirectoryPath = Path.Combine(directory, openedFileName);
+
+        if (!Directory.Exists(targetDirectoryPath))
+        {
+            Directory.CreateDirectory(targetDirectoryPath);
+        }
+
+        using var fs = new FileStream(nResPath, FileMode.Open);
+
+        foreach (var archiveFile in archive.Files)
+        {
+            fs.Seek(archiveFile.OffsetInFile, SeekOrigin.Begin);
+
+            var buffer = new byte[archiveFile.FileLength];
+            
+            fs.ReadExactly(buffer, 0, archiveFile.FileLength);
+
+            var extension = Path.GetExtension(archiveFile.FileName);
+            var fileName = Path.GetFileNameWithoutExtension(archiveFile.FileName);
+
+            if (extension == "")
+            {
+                extension = ".bin";
+            }
+            
+            var targetFilePath = Path.Combine(targetDirectoryPath, $"{archiveFile.Index}_{fileName}{extension}");
+            
+            File.WriteAllBytes(targetFilePath, buffer);
+        }
+    }
+}