1 files changed, 30 insertions, 0 deletions
diff --git a/src/IOL.Helpers/InMemoryZipArchive.cs b/src/IOL.Helpers/InMemoryZipArchive.cs
new file mode 100644
index 0000000..8d3fc94
--- /dev/null
+++ b/src/IOL.Helpers/InMemoryZipArchive.cs
@@ -0,0 +1,30 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.IO.Compression;
+
+namespace IOL.Helpers
+{
+	public static class InMemoryZipArchive
+	{
+		public static byte[] Create(IEnumerable<InMemoryFile> files, string unixPermissionString = "664") {
+			using var archiveStream = new MemoryStream();
+			using (var archive = new ZipArchive(archiveStream, ZipArchiveMode.Create, true)) {
+				foreach (var file in files) {
+					var zipArchiveEntry = archive.CreateEntry(file.FileName, CompressionLevel.Fastest);
+					zipArchiveEntry.ExternalAttributes |= Convert.ToInt32(unixPermissionString, 8) << 16;
+					using var zipStream = zipArchiveEntry.Open();
+					zipStream.Write(file.Content, 0, file.Content.Length);
+				}
+			}
+
+			return archiveStream.ToArray();
+		}
+
+		public class InMemoryFile
+		{
+			public string FileName { get; set; }
+			public byte[] Content { get; set; }
+		}
+	}
+}