1 files changed, 37 insertions, 0 deletions
diff --git a/app/serializers/analytics/cycle_analytics/event_entity.rb b/app/serializers/analytics/cycle_analytics/event_entity.rb
new file mode 100644
index 00000000000..b9abf722c8d
--- /dev/null
+++ b/app/serializers/analytics/cycle_analytics/event_entity.rb
@@ -0,0 +1,37 @@
+# frozen_string_literal: true
+
+module Analytics
+  module CycleAnalytics
+    class EventEntity < Grape::Entity
+      expose :name
+      expose :identifier
+      expose :type
+      expose :can_be_start_event?, as: :can_be_start_event
+      expose :allowed_end_events
+
+      private
+
+      def type
+        object.label_based? ? 'label' : 'simple'
+      end
+
+      def can_be_start_event?
+        pairing_rules.has_key?(object)
+      end
+
+      def allowed_end_events
+        pairing_rules.fetch(object, []).map do |event|
+          event.identifier unless stage_events.internal_events.include?(event)
+        end.compact
+      end
+
+      def pairing_rules
+        stage_events.pairing_rules
+      end
+
+      def stage_events
+        Gitlab::Analytics::CycleAnalytics::StageEvents
+      end
+    end
+  end
+end