as is

StopShopping.FileApi/Services/Extensions.cs

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+
+using FileSignatures;
+using FileSignatures.Formats;
+using StopShopping.FileApi.Services.Implementions;
+
+namespace StopShopping.FileApi.Services;
+
+public static class Extensions
+{
+    public static IServiceCollection AddServices(this IServiceCollection services, IConfiguration appOptions)
+    {
+        services.Configure<AppOptions>(appOptions);
+        services.AddValidation();
+
+        var imageFormats = FileFormatLocator.GetFormats().OfType<Image>();
+        var imageInspector = new FileFormatInspector(imageFormats);
+        services.AddSingleton<IFileFormatInspector>(imageInspector);
+
+        services.AddScoped<IFileService, FileService>();
+
+        return services;
+    }
+
+    public static string GetTargetDirectory(this UploadScences uploadScences)
+    {
+        return uploadScences switch
+        {
+            UploadScences.Avatar => "avatar",
+            UploadScences.Product => "product",
+            UploadScences.Category => "category",
+            _ => throw new ArgumentOutOfRangeException(nameof(uploadScences))
+        };
+    }
+}