ServiceCollectionExtensions.cs

using Microsoft.Extensions.DependencyInjection;
using ShellDocs.Components.Chrome;
using ShellDocs.Components.Content;
using ShellDocs.Core;
using ShellDocs.Markdown;

namespace ShellDocs.Components;

public static class ServiceCollectionExtensions
{
 public static IServiceCollection AddShellDocs(this IServiceCollection services, Action<ShellDocsOptions>? configure = null)
 {
 var options = new ShellDocsOptions();
 configure?.Invoke(options);
 services.AddSingleton(options);

 services.AddScoped<MobileNavState>();
 services.AddScoped<ThemeState>();
 services.AddScoped<SearchState>();
 services.AddScoped<SidebarCollapseState>();
 services.AddScoped<CodeGroupSyncState>();
 services.AddScoped<DocsPageState>();

 /* Auto-register the shipped content primitives so `razor:preview` blocks
 in markdown can reference <Callout>, <Card>, <Steps>, <FileTree> etc.
 without the consumer calling RegisterComponent<T>() themselves.
 Dogfoods RegisterComponentsFromAssembly against our own Content
 namespace — new primitives added under Content/ auto-appear here
 without a maintainer edit to this file. Internal render machinery
 (MarkdownContent, PreviewFrame) opts out via [ShellDocsIgnore]. */
 options.RegisterComponentsFromAssembly<Callout>(t => t.Namespace == "ShellDocs.Components.Content");

 services.AddSingleton<TypeRegistry>(_ => options.BuildTypeRegistry());
 services.AddSingleton<MarkdownRenderer>(sp => new MarkdownRenderer(sp.GetRequiredService<TypeRegistry>()));

 services.AddSingleton<NavigationGraph>(_ =>
 {
 if (!Directory.Exists(options.ContentRoot))
 {
 return new NavigationGraph(new NavigationNode { Url = "/", Kind = NodeKind.Section });
 }
 return NavigationGraphBuilder.Build(options.ContentRoot);
 });
 services.AddSingleton<SearchIndex>(sp => SearchIndex.FromGraph(sp.GetRequiredService<NavigationGraph>()));

 return services;
 }
}