Add autocomplete_sources/epics endpoint

Add epics path to autocomplete_data_sources

config/routes/group.rb

@@ -90,6 +90,7 @@ constraints(::Constraints::GroupUrlConstrainer.new) do
     resources :autocomplete_sources, only: [] do
       collection do
         get 'members'
+        get 'epics'
       end
     end
 

ee/app/controllers/groups/autocomplete_sources_controller.rb

 class Groups::AutocompleteSourcesController < Groups::ApplicationController
+  before_action :load_autocomplete_service, except: [:members]
+
   def members
     render json: ::Groups::ParticipantsService.new(@group, current_user).execute(target)
   end
 
+  def epics
+    render json: @autocomplete_service.epics
+  end
+
   private
 
+  def load_autocomplete_service
+    @autocomplete_service = ::Groups::AutocompleteService.new(@group, current_user)
+  end
+
   def target
     case params[:type]&.downcase
     when 'epic'

ee/app/helpers/ee/application_helper.rb

@@ -66,7 +66,8 @@ module EE
       return super unless object.is_a?(Group)
 
       {
-        members: members_group_autocomplete_sources_path(object, type: noteable_type, type_id: params[:id])
+        members: members_group_autocomplete_sources_path(object, type: noteable_type, type_id: params[:id]),
+        epics: epics_group_autocomplete_sources_path(object)
       }
     end