1 files changed, 31 insertions, 0 deletions
diff --git a/tooling/danger/user_types.rb b/tooling/danger/user_types.rb
new file mode 100644
index 00000000000..8320c43ae93
--- /dev/null
+++ b/tooling/danger/user_types.rb
@@ -0,0 +1,31 @@
+# frozen_string_literal: true
+
+module Tooling
+  module Danger
+    module UserTypes
+      FILE_PATH = "app/models/concerns/has_user_type.rb"
+      BOT_USER_TYPES_CHANGE_INDICATOR_REGEX = %r{BOT_USER_TYPES}.freeze
+      BOT_USER_TYPES_CHANGED_WARNING = <<~MSG
+        You are changing BOT_USER_TYPES in `app/models/concerns/has_user_type.rb`.
+        If you are adding or removing new bots, remember to update the `active_billable_users` index with the new value.
+        If the bot is not billable, remember to make sure that it's not counted as a billable user.
+      MSG
+
+      def bot_user_types_change_warning
+        return unless impacted?
+
+        warn BOT_USER_TYPES_CHANGED_WARNING if bot_user_types_impacted?
+      end
+
+      private
+
+      def impacted?
+        helper.modified_files.include?(FILE_PATH)
+      end
+
+      def bot_user_types_impacted?
+        helper.changed_lines(FILE_PATH).any? { |change| change =~ BOT_USER_TYPES_CHANGE_INDICATOR_REGEX }
+      end
+    end
+  end
+end