Fix status code

slices/micropub/actions/posts/handle.rb

@@ -22,12 +22,13 @@ module Micropub
           if action_type
             case resolve_command(req: req, action_type: action_type)
             in Success[command]
-              command.call(params: req.params.to_h)
+              if command.call(params: req.params.to_h).success?
                 res.status = 200
+              else
+                halt 400
+              end
             in Failure[:not_permitted]
               halt 401
-            in Failure[:invalid_request]
-              halt 400
             end
           end
 

slices/micropub/commands/posts/update.rb

@@ -13,7 +13,7 @@ module Micropub
           post = post_repo.fetch!(slug)
 
           if params.key? :replace
-            return Failure(:invalid_request) 400 unless params[:replace].is_a?(Hash)
+            return Failure(:invalid_request) unless params[:replace].is_a?(Hash)
 
             content = params[:replace].delete(:content)
             content = content.is_a?(Array) ? content.first : content