- add: Service think

Nebula.Launcher/FileApis/HashApi.cs

@@ -0,0 +1,32 @@
+using System.Collections.Generic;
+using System.IO;
+using Nebula.Launcher.Utils;
+using Robust.LoaderApi;
+
+namespace Nebula.Launcher.FileApis;
+
+public class HashApi : IFileApi
+{
+    private readonly IFileApi _fileApi;
+    public Dictionary<string, RobustManifestItem> Manifest;
+
+    public HashApi(List<RobustManifestItem> manifest, IFileApi fileApi)
+    {
+        _fileApi = fileApi;
+        Manifest = new Dictionary<string, RobustManifestItem>();
+        foreach (var item in manifest) Manifest.TryAdd(item.Path, item);
+    }
+
+    public bool TryOpen(string path, out Stream? stream)
+    {
+        if (path[0] == '/') path = path.Substring(1);
+
+        if (Manifest.TryGetValue(path, out var a) && _fileApi.TryOpen(a.Hash, out stream))
+            return true;
+
+        stream = null;
+        return false;
+    }
+
+    public IEnumerable<string> AllFiles => Manifest.Keys;
+}