refact: Fully refactor the conceptional structure and functional behaviour.

YaeBlog.Core/Extensions/WebApplicationExtensions.cs

@@ -0,0 +1,33 @@
+using Microsoft.AspNetCore.Builder;
+using Microsoft.Extensions.DependencyInjection;
+using YaeBlog.Core.Abstractions;
+using YaeBlog.Core.Processors;
+using YaeBlog.Core.Services;
+
+namespace YaeBlog.Core.Extensions;
+
+public static class WebApplicationExtensions
+{
+    public static WebApplication UseMiddleRenderProcessors(this WebApplication application)
+    {
+        application.UsePostRenderProcessor<ImagePostRenderProcessor>();
+
+        return application;
+    }
+
+    private static void UsePreRenderProcessor<T>(this WebApplication application) where T : IPreRenderProcessor
+    {
+        RendererService rendererService = application.Services.GetRequiredService<RendererService>();
+        T preRenderProcessor = application.Services.GetRequiredService<T>();
+
+        rendererService.AddPreRenderProcessor(preRenderProcessor);
+    }
+
+    private static void UsePostRenderProcessor<T>(this WebApplication application) where T : IPostRenderProcessor
+    {
+        RendererService rendererService = application.Services.GetRequiredService<RendererService>();
+        T postRenderProcessor = application.Services.GetRequiredService<T>();
+
+        rendererService.AddPostRenderProcessor(postRenderProcessor);
+    }
+}