Refactor notification logic into a new private method

Moved Pingback and Webmention logic to `NotifyExternalServices`
method in `PostController` for better readability and
maintainability. Removed inline code from the main method and
replaced it with a call to the new method, passing necessary
parameters.

src/Moonglade.Web/Controllers/PostController.cs

@@ -54,16 +54,7 @@ await mediator.Send(new CreatePostCommand(model)) :
             var baseUri = new Uri(Helper.ResolveRootUrl(HttpContext, null, removeTailSlash: true));
             var link = new Uri(baseUri, $"post/{postEntity.RouteLink.ToLower()}");
 
-            if (blogConfig.AdvancedSettings.EnablePingback)
-            {
-                cannonService.FireAsync<IPingbackSender>(async sender => await sender.TrySendPingAsync(link.ToString(), postEntity.PostContent));
-            }
-
-            if (blogConfig.AdvancedSettings.EnableWebmention)
-            {
-                cannonService.FireAsync<IWebmentionSender>(async sender => await sender.SendWebmentionAsync(link.ToString(), postEntity.PostContent));
-            }
-
+            NotifyExternalServices(postEntity.PostContent, link);
             ProcessIndexing(model.LastModifiedUtc, postEntity.LastModifiedUtc == postEntity.PubDateUtc, link);
 
             return Ok(new { PostId = postEntity.Id });
@@ -75,6 +66,19 @@ await mediator.Send(new CreatePostCommand(model)) :
         }
     }
 
+    private void NotifyExternalServices(string postContent, Uri link)
+    {
+        if (blogConfig.AdvancedSettings.EnablePingback)
+        {
+            cannonService.FireAsync<IPingbackSender>(async sender => await sender.TrySendPingAsync(link.ToString(), postContent));
+        }
+
+        if (blogConfig.AdvancedSettings.EnableWebmention)
+        {
+            cannonService.FireAsync<IWebmentionSender>(async sender => await sender.SendWebmentionAsync(link.ToString(), postContent));
+        }
+    }
+
     private void ProcessIndexing(string lastModifiedUtc, bool isNewPublish, Uri link)
     {
         bool indexCoolDown = true;