Add top-level warnings key to performance bar response

This key is useful to reduce the amount of logic needed on the frontend:
if `has_warnings` is true, then the frontend knows that the request in
question has warnings for some metric.

1 files changed, 19 insertions, 0 deletions

diff --git a/lib/gitlab/performance_bar/with_top_level_warnings.rb b/lib/gitlab/performance_bar/with_top_level_warnings.rb
new file mode 100644
index 00000000000..fb5c5c5959d
--- /dev/null
+++ b/lib/gitlab/performance_bar/with_top_level_warnings.rb
@@ -0,0 +1,19 @@
+# frozen_string_literal: true
+
+module Gitlab
+  module PerformanceBar
+    module WithTopLevelWarnings
+      def results
+        results = super
+
+        results.merge(has_warnings: has_warnings?(results))
+      end
+
+      def has_warnings?(results)
+        results[:data].any? do |_, value|
+          value[:warnings].present?
+        end
+      end
+    end
+  end
+end