[frontend] Track result of login attempts

This allows us more fine grained graphs.

src/api/app/controllers/webui/session_controller.rb

@@ -9,18 +9,21 @@ def create
     user = User.find_with_credentials(params[:username], params[:password])
 
     unless user
+      RabbitmqBus.send_to_bus('metrics', 'user.login,access_point=webui,result=failed,failure_reason=unauthenticated id=0')
       redirect_to(session_new_path, error: 'Authentication failed')
       return
     end
 
     unless user.is_active?
+      RabbitmqBus.send_to_bus('metrics', "user.login,access_point=webui,result=failed,failure_reason=inactive id=#{user.id}")
       redirect_to(root_path, error: 'Your account is disabled. Please contact the administrator for details.')
       return
     end
 
     User.current = user
     session[:login] = user.login
     Rails.logger.debug "Authenticated as user '#{user.login}'"
+    RabbitmqBus.send_to_bus('metrics', "user.login,access_point=webui,result=succeeded id=#{user.id}")
 
     redirect_on_login
   end

src/api/app/models/user.rb

@@ -855,7 +855,6 @@ def combined_rss_feed_items
 
   def mark_login!
     update_attributes(last_logged_in_at: Time.now, login_failure_count: 0)
-    RabbitmqBus.send_to_bus('metrics', "user.login id=#{id}")
   end
 
   private