barnstar tag commenting (publiclab#2223)

app/controllers/tag_controller.rb

@@ -255,6 +255,15 @@ def create
         @output[:errors] << I18n.t('tag_controller.tag_already_exists')
       elsif node.can_tag(tagname, current_user) === true || current_user.role == 'admin' # || current_user.role == "moderator"
         saved, tag = node.add_tag(tagname.strip, current_user)
+        if tagname.split(':')[0] == "barnstar"
+          CommentMailer.notify_barnstar(current_user, node)
+          barnstar_info_link = '<a href="//' + request.host.to_s + '/wiki/barnstars">barnstar</a>'
+          node.add_comment(subject: 'barnstar',
+                           uid: current_user.uid,
+                           body: "@#{current_user.username} awards a #{barnstar_info_link} to #{node.drupal_user.name} for their awesome contribution!")
+
+        end
+
         if saved
           @tags << tag
           @output[:saved] << [tag.name, tag.id]