1 files changed, 34 insertions, 0 deletions
diff --git a/lib/gitlab/performance_bar.rb b/lib/gitlab/performance_bar.rb
new file mode 100644
index 00000000000..56112ec2301
--- /dev/null
+++ b/lib/gitlab/performance_bar.rb
@@ -0,0 +1,34 @@
+module Gitlab
+  module PerformanceBar
+    include Gitlab::CurrentSettings
+
+    ALLOWED_USER_IDS_KEY = 'performance_bar_allowed_user_ids:v2'.freeze
+    EXPIRY_TIME = 5.minutes
+
+    def self.enabled?(user = nil)
+      return false unless user && allowed_group_id
+
+      allowed_user_ids.include?(user.id)
+    end
+
+    def self.allowed_group_id
+      current_application_settings.performance_bar_allowed_group_id
+    end
+
+    def self.allowed_user_ids
+      Rails.cache.fetch(ALLOWED_USER_IDS_KEY, expires_in: EXPIRY_TIME) do
+        group = Group.find_by_id(allowed_group_id)
+
+        if group
+          GroupMembersFinder.new(group).execute.pluck(:user_id)
+        else
+          []
+        end
+      end
+    end
+
+    def self.expire_allowed_user_ids_cache
+      Rails.cache.delete(ALLOWED_USER_IDS_KEY)
+    end
+  end
+end