- tweak: refactor funny

Nebula.Shared/FileApis/ZipFileApi.cs

@@ -0,0 +1,61 @@
+using System.Diagnostics.CodeAnalysis;
+using System.IO.Compression;
+using System.Runtime.InteropServices;
+using Robust.LoaderApi;
+
+namespace Nebula.Shared.FileApis;
+
+public sealed class ZipFileApi : IFileApi
+{
+    private readonly ZipArchive _archive;
+    private readonly string? _prefix;
+
+    public ZipFileApi(ZipArchive archive, string? prefix)
+    {
+        _archive = archive;
+        _prefix = prefix;
+    }
+
+    public bool TryOpen(string path, [NotNullWhen(true)] out Stream? stream)
+    {
+        var entry = _archive.GetEntry(_prefix != null ? _prefix + path : path);
+        if (entry == null)
+        {
+            stream = null;
+            return false;
+        }
+
+        stream = new MemoryStream();
+        lock (_archive)
+        {
+            using var zipStream = entry.Open();
+            zipStream.CopyTo(stream);
+        }
+
+        stream.Position = 0;
+        return true;
+    }
+
+    public IEnumerable<string> AllFiles
+    {
+        get
+        {
+            if (_prefix != null)
+                return _archive.Entries
+                    .Where(e => e.Name != "" && e.FullName.StartsWith(_prefix))
+                    .Select(e => e.FullName[_prefix.Length..]);
+            return _archive.Entries
+                .Where(e => e.Name != "")
+                .Select(entry => entry.FullName);
+        }
+    }
+
+    public static ZipFileApi FromPath(string path)
+    {
+        var zipArchive = new ZipArchive(File.OpenRead(path), ZipArchiveMode.Read);
+
+        var prefix = "";
+        if (RuntimeInformation.IsOSPlatform(OSPlatform.OSX)) prefix = "Space Station 14.app/Contents/Resources/";
+        return new ZipFileApi(zipArchive, prefix);
+    }
+}