1 files changed, 75 insertions, 0 deletions
diff --git a/app/models/sidebars/panel.rb b/app/models/sidebars/panel.rb
new file mode 100644
index 00000000000..5c8191ebda3
--- /dev/null
+++ b/app/models/sidebars/panel.rb
@@ -0,0 +1,75 @@
+# frozen_string_literal: true
+
+module Sidebars
+  class Panel
+    extend ::Gitlab::Utils::Override
+    include ::Sidebars::PositionableList
+
+    attr_reader :context, :scope_menu, :hidden_menu
+
+    def initialize(context)
+      @context = context
+      @scope_menu = nil
+      @hidden_menu = nil
+      @menus = []
+
+      configure_menus
+    end
+
+    def configure_menus
+      # No-op
+    end
+
+    def add_menu(menu)
+      add_element(@menus, menu)
+    end
+
+    def insert_menu_before(before_menu, new_menu)
+      insert_element_before(@menus, before_menu, new_menu)
+    end
+
+    def insert_menu_after(after_menu, new_menu)
+      insert_element_after(@menus, after_menu, new_menu)
+    end
+
+    def set_scope_menu(scope_menu)
+      @scope_menu = scope_menu
+    end
+
+    def set_hidden_menu(hidden_menu)
+      @hidden_menu = hidden_menu
+    end
+
+    def aria_label
+      raise NotImplementedError
+    end
+
+    def has_renderable_menus?
+      renderable_menus.any?
+    end
+
+    def renderable_menus
+      @renderable_menus ||= @menus.select(&:render?)
+    end
+
+    def container
+      context.container
+    end
+
+    # Auxiliar method that helps with the migration from
+    # regular views to the new logic
+    def render_raw_scope_menu_partial
+      # No-op
+    end
+
+    # Auxiliar method that helps with the migration from
+    # regular views to the new logic.
+    #
+    # Any menu inside this partial will be added after
+    # all the menus added in the `configure_menus`
+    # method.
+    def render_raw_menus_partial
+      # No-op
+    end
+  end
+end