Merge branch 'master' into 'docs/fix-example-dot-net'

# Conflicts:
#   doc/user/project/clusters/serverless/index.md

1 files changed, 46 insertions, 0 deletions

diff --git a/lib/gitlab/metrics/dashboard/processor.rb b/lib/gitlab/metrics/dashboard/processor.rb
new file mode 100644
index 00000000000..dd986020693
--- /dev/null
+++ b/lib/gitlab/metrics/dashboard/processor.rb
@@ -0,0 +1,46 @@
+# frozen_string_literal: true
+
+module Gitlab
+  module Metrics
+    module Dashboard
+      # Responsible for processesing a dashboard hash, inserting
+      # relevant DB records & sorting for proper rendering in
+      # the UI. These includes shared metric info, custom metrics
+      # info, and alerts (only in EE).
+      class Processor
+        SYSTEM_SEQUENCE = [
+          Stages::CommonMetricsInserter,
+          Stages::ProjectMetricsInserter,
+          Stages::Sorter
+        ].freeze
+
+        PROJECT_SEQUENCE = [
+          Stages::CommonMetricsInserter,
+          Stages::Sorter
+        ].freeze
+
+        def initialize(project, environment, dashboard)
+          @project = project
+          @environment = environment
+          @dashboard = dashboard
+        end
+
+        # Returns a new dashboard hash with the results of
+        # running transforms on the dashboard.
+        def process(insert_project_metrics:)
+          @dashboard.deep_symbolize_keys.tap do |dashboard|
+            sequence(insert_project_metrics).each do |stage|
+              stage.new(@project, @environment, dashboard).transform!
+            end
+          end
+        end
+
+        private
+
+        def sequence(insert_project_metrics)
+          insert_project_metrics ? SYSTEM_SEQUENCE : PROJECT_SEQUENCE
+        end
+      end
+    end
+  end
+end