Added the BeyondFacts Lab as a prototype (#1175)

app/MindWork AI Studio/Tools/AppResources.cs

@@ -0,0 +1,64 @@
+using System.Text;
+
+using Microsoft.Extensions.FileProviders;
+
+#if RELEASE
+using System.Reflection;
+#endif
+
+namespace AIStudio.Tools;
+
+/// <summary>
+/// Reads files which come with AI Studio, such as prompts, guides, or the built-in plugins.
+/// </summary>
+/// <remarks>
+/// The files lie below the project folder and are listed as EmbeddedResource in the project file. A development
+/// build reads them from the disk, so that a change shows without building again; a release reads them from the
+/// resources embedded into the app. Paths are relative to the project folder and use forward slashes.
+/// </remarks>
+public static class AppResources
+{
+    /// <summary>
+    /// Gets a file provider for a folder of the app.
+    /// </summary>
+    /// <param name="relativeFolder">The folder, relative to the project folder, e.g., "Plugins".</param>
+    /// <returns>The file provider, whose paths are relative to that folder.</returns>
+    public static IFileProvider FolderProvider(string relativeFolder)
+    {
+        var folder = Normalize(relativeFolder);
+#if DEBUG
+        return new PhysicalFileProvider(Path.Join(Environment.CurrentDirectory, folder));
+#else
+        return new ManifestEmbeddedFileProvider(Assembly.GetAssembly(typeof(Program))!, folder);
+#endif
+    }
+
+    /// <summary>
+    /// Reads a text file of the app.
+    /// </summary>
+    /// <param name="relativePath">The file, relative to the project folder, e.g., "Assistants/PromptOptimizer/prompting_guideline.md".</param>
+    /// <param name="token">The cancellation token.</param>
+    /// <returns>The text, or an empty string when the app has no such file.</returns>
+    public static async Task<string> ReadTextAsync(string relativePath, CancellationToken token = default)
+    {
+        var path = Normalize(relativePath);
+#if DEBUG
+        var filePath = Path.Join(Environment.CurrentDirectory, path);
+        return File.Exists(filePath) ? await File.ReadAllTextAsync(filePath, Encoding.UTF8, token) : string.Empty;
+#else
+        var file = new ManifestEmbeddedFileProvider(Assembly.GetAssembly(typeof(Program))!).GetFileInfo(path);
+        if (!file.Exists || file.IsDirectory)
+            return string.Empty;
+
+        await using var stream = file.CreateReadStream();
+        using var reader = new StreamReader(stream, Encoding.UTF8);
+        return await reader.ReadToEndAsync(token);
+#endif
+    }
+
+    /// <summary>
+    /// Turns a path into the form both kinds of builds understand: forward slashes, without a slash at either end.
+    /// </summary>
+    /// <param name="relativePath">The path.</param>
+    private static string Normalize(string relativePath) => relativePath.Replace('\\', '/').Trim('/');
+}