1 files changed, 82 insertions, 0 deletions
diff --git a/app/models/sidebars/menu.rb b/app/models/sidebars/menu.rb
new file mode 100644
index 00000000000..a5c8be2bb31
--- /dev/null
+++ b/app/models/sidebars/menu.rb
@@ -0,0 +1,82 @@
+# frozen_string_literal: true
+
+module Sidebars
+  class Menu
+    extend ::Gitlab::Utils::Override
+    include ::Gitlab::Routing
+    include GitlabRoutingHelper
+    include Gitlab::Allowable
+    include ::Sidebars::HasPill
+    include ::Sidebars::HasIcon
+    include ::Sidebars::PositionableList
+    include ::Sidebars::Renderable
+    include ::Sidebars::ContainerWithHtmlOptions
+    include ::Sidebars::HasActiveRoutes
+
+    attr_reader :context
+    delegate :current_user, :container, to: :@context
+
+    def initialize(context)
+      @context = context
+      @items = []
+
+      configure_menu_items
+    end
+
+    def configure_menu_items
+      # No-op
+    end
+
+    override :render?
+    def render?
+      @items.empty? || renderable_items.any?
+    end
+
+    # Menus might have or not a link
+    override :link
+    def link
+      nil
+    end
+
+    # This method normalizes the information retrieved from the submenus and this menu
+    # Value from menus is something like: [{ path: 'foo', path: 'bar', controller: :foo }]
+    # This method filters the information and returns: { path: ['foo', 'bar'], controller: :foo }
+    def all_active_routes
+      @all_active_routes ||= begin
+        ([active_routes] + renderable_items.map(&:active_routes)).flatten.each_with_object({}) do |pairs, hash|
+          pairs.each do |k, v|
+            hash[k] ||= []
+            hash[k] += Array(v)
+            hash[k].uniq!
+          end
+
+          hash
+        end
+      end
+    end
+
+    def has_items?
+      @items.any?
+    end
+
+    def add_item(item)
+      add_element(@items, item)
+    end
+
+    def insert_item_before(before_item, new_item)
+      insert_element_before(@items, before_item, new_item)
+    end
+
+    def insert_item_after(after_item, new_item)
+      insert_element_after(@items, after_item, new_item)
+    end
+
+    def has_renderable_items?
+      renderable_items.any?
+    end
+
+    def renderable_items
+      @renderable_items ||= @items.select(&:render?)
+    end
+  end
+end