Port EE System Header And Footer feature to CE

remove EE specific code
remove EE licence checks
move migration from EE to CE folder structure
move specs from EE to CE folder structure
remove EE specific flag specs

1 files changed, 15 insertions, 2 deletions

diff --git a/app/helpers/application_helper.rb b/app/helpers/application_helper.rb
index 9efa84b02f0..ffa5719fefb 100644
--- a/app/helpers/application_helper.rb
+++ b/app/helpers/application_helper.rb
@@ -214,12 +214,19 @@ module ApplicationHelper
     class_names = []
     class_names << 'issue-boards-page' if current_controller?(:boards)
     class_names << 'with-performance-bar' if performance_bar_enabled?
-
+    class_names << system_message_class
     class_names
   end
 
-  # EE feature: System header and footer, unavailable in CE
   def system_message_class
+    class_names = []
+
+    return class_names unless appearance
+
+    class_names << 'with-system-header' if appearance.show_header?
+    class_names << 'with-system-footer' if appearance.show_footer?
+
+    class_names
   end
 
   # Returns active css class when condition returns true
@@ -292,4 +299,10 @@ module ApplicationHelper
       snippets: snippets_project_autocomplete_sources_path(object)
     }
   end
+
+  private
+
+  def appearance
+    ::Appearance.current
+  end
 end