1 files changed, 42 insertions, 0 deletions
diff --git a/lib/gitlab/usage_data_counters/designs_counter.rb b/lib/gitlab/usage_data_counters/designs_counter.rb
new file mode 100644
index 00000000000..801fb8f3b3d
--- /dev/null
+++ b/lib/gitlab/usage_data_counters/designs_counter.rb
@@ -0,0 +1,42 @@
+# frozen_string_literal: true
+
+module Gitlab::UsageDataCounters
+  class DesignsCounter
+    extend Gitlab::UsageDataCounters::RedisCounter
+
+    KNOWN_EVENTS = %w[create update delete].map(&:freeze).freeze
+
+    UnknownEvent = Class.new(StandardError)
+
+    class << self
+      # Each event gets a unique Redis key
+      def redis_key(event)
+        raise UnknownEvent, event unless KNOWN_EVENTS.include?(event.to_s)
+
+        "USAGE_DESIGN_MANAGEMENT_DESIGNS_#{event}".upcase
+      end
+
+      def count(event)
+        increment(redis_key(event))
+      end
+
+      def read(event)
+        total_count(redis_key(event))
+      end
+
+      def totals
+        KNOWN_EVENTS.map { |event| [counter_key(event), read(event)] }.to_h
+      end
+
+      def fallback_totals
+        KNOWN_EVENTS.map { |event| [counter_key(event), -1] }.to_h
+      end
+
+      private
+
+      def counter_key(event)
+        "design_management_designs_#{event}".to_sym
+      end
+    end
+  end
+end