lib/rubocop/cop/rails/request_referer.rb


# frozen_string_literal: true

module RuboCop
  module Cop
    module Rails
      # This cop checks for consistent uses of request.referrer or
      # request.referrer, depending on configuration.
      class RequestReferer < Cop
        include ConfigurableEnforcedStyle

        def_node_matcher :referer?, <<-PATTERN
          (send (send nil :request) ${:referer :referrer})
        PATTERN

        def on_send(node)
          referer?(node) do |method_name|
            return unless method_name == wrong_method_name
            add_offense(node.source_range, node.source_range, message)
          end
        end

        def autocorrect(node)
          ->(corrector) { corrector.replace(node, "request.#{style}") }
        end

        private

        def message
          "Use `request.#{style}` instead of `request.#{wrong_method_name}`."
        end

        def wrong_method_name
          style == :referer ? :referrer : :referer
        end
      end
    end
  end
end