Save syndication sources to posts

app/commands/posts/syndicate.rb

@@ -1,12 +1,20 @@
+require "dry/monads"
+require "dry/monads/do"
+
 module Adamantium
   module Commands
     module Posts
       class Syndicate
+        include Dry::Monads[:result]
+        include Dry::Monads::Do.for(:call)
+
         include Deps["settings", "syndication.mastodon"]
 
         def call(post)
           if post[:syndicate_to].any? { |url| settings.mastodon_server.match(/#{url}/) }
-            mastodon.call(post: post)
+            url = yield mastodon.call(post: post)
+
+            Success([:mastodon, url])
           end
         end
       end