Merge branch '55057-system-message-to-core' into 'master'

Port EE System Header And Footer feature to CE

Closes #55057

See merge request gitlab-org/gitlab-ce!25241

2 files changed, 47 insertions, 2 deletions

diff --git a/app/helpers/appearances_helper.rb b/app/helpers/appearances_helper.rb
index 7fbbbb04154..023e44258b7 100644
--- a/app/helpers/appearances_helper.rb
+++ b/app/helpers/appearances_helper.rb
@@ -40,4 +40,36 @@ module AppearancesHelper
       render 'shared/logo_type.svg'
     end
   end
+
+  def header_message
+    return unless current_appearance&.show_header?
+
+    class_names = []
+    class_names << 'with-performance-bar' if performance_bar_enabled?
+
+    render_message(:header_message, class_names)
+  end
+
+  def footer_message
+    return unless current_appearance&.show_footer?
+
+    render_message(:footer_message)
+  end
+
+  private
+
+  def render_message(field_sym, class_names = [])
+    class_names << field_sym.to_s.dasherize
+
+    content_tag :div, class: class_names, style: message_style do
+      markdown_field(current_appearance, field_sym)
+    end
+  end
+
+  def message_style
+    style = []
+    style << "background-color: #{current_appearance.message_background_color};"
+    style << "color: #{current_appearance.message_font_color}"
+    style.join
+  end
 end
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