lib/rubocop/cop/metrics/class_length.rb


# frozen_string_literal: true

module RuboCop
  module Cop
    module Metrics
      # This cop checks if the length a class exceeds some maximum value.
      # Comment lines can optionally be ignored.
      # The maximum allowed length is configurable.
      class ClassLength < Cop
        include ClassishLength

        def on_class(node)
          check_code_length(node)
        end

        def on_casgn(node)
          class_definition?(node) do
            check_code_length(node)
          end
        end

        private

        def_node_matcher :class_definition?, <<-PATTERN
          (casgn nil? _ (block (send (const nil? :Class) :new) ...))
        PATTERN

        def message(length, max_length)
          format('Class has too many lines. [%<length>d/%<max>d]',
                 length: length,
                 max: max_length)
        end
      end
    end
  end
end