1 files changed, 47 insertions, 0 deletions
diff --git a/app/services/analytics/cycle_analytics/stages/base_service.rb b/app/services/analytics/cycle_analytics/stages/base_service.rb
new file mode 100644
index 00000000000..b676eff0a0b
--- /dev/null
+++ b/app/services/analytics/cycle_analytics/stages/base_service.rb
@@ -0,0 +1,47 @@
+# frozen_string_literal: true
+
+module Analytics
+  module CycleAnalytics
+    module Stages
+      class BaseService
+        include Gitlab::Allowable
+
+        DEFAULT_VALUE_STREAM_NAME = 'default'
+
+        def initialize(parent:, current_user:, params: {})
+          @parent = parent
+          @current_user = current_user
+          @params = params
+        end
+
+        def execute
+          raise NotImplementedError
+        end
+
+        private
+
+        attr_reader :parent, :current_user, :params
+
+        def success(stage, http_status = :created)
+          ServiceResponse.success(payload: { stage: stage }, http_status: http_status)
+        end
+
+        def forbidden
+          ServiceResponse.error(message: 'Forbidden', payload: {}, http_status: :forbidden)
+        end
+
+        def build_default_stages
+          Gitlab::Analytics::CycleAnalytics::DefaultStages.all.map do |stage_params|
+            parent.cycle_analytics_stages.build(stage_params.merge(value_stream: value_stream))
+          end
+        end
+
+        def value_stream
+          @value_stream ||= params[:value_stream]
+        end
+      end
+    end
+  end
+end
+
+Analytics::CycleAnalytics::Stages::BaseService.prepend_mod_with('Analytics::CycleAnalytics::Stages::BaseService')