Sanitize remote html in atom feeds, API (not just UI), use cached mention

relations on Status#mentions

app/helpers/application_helper.rb

@@ -12,6 +12,14 @@ module ApplicationHelper
     id.start_with?("tag:#{Rails.configuration.x.local_domain}")
   end
 
+  def content_for_status(actual_status)
+    if actual_status.local?
+      linkify(actual_status)
+    else
+      sanitize(actual_status.content, tags: %w(a br p), attributes: %w(href rel))
+    end
+  end
+
   def linkify(status)
     mention_hash = {}
     status.mentions.each { |m| mention_hash[m.acct] = m }

app/helpers/atom_builder_helper.rb

@@ -137,13 +137,7 @@ module AtomBuilderHelper
 
   def conditionally_formatted(activity)
     if activity.is_a?(Status)
-      if activity.reblog? && activity.reblog.local?
-        linkify(activity.reblog)
-      elsif !activity.reblog? && activity.local?
-        linkify(activity)
-      else
-        activity.content
-      end
+      content_for_status(activity.reblog? ? activity.reblog : activity)
     elsif activity.nil?
       nil
     else

app/helpers/stream_entries_helper.rb

@@ -27,12 +27,4 @@ module StreamEntriesHelper
   def favourited_by_me_class(status)
     user_signed_in? && current_user.account.favourited?(status) ? 'favourited' : ''
   end
-
-  def content_for_status(actual_status)
-    if actual_status.local?
-      linkify(actual_status)
-    else
-      sanitize(actual_status.content, tags: %w(a br p), attributes: %w(href rel))
-    end
-  end
 end