require "#{File.dirname(__FILE__)}/abstract_note"

module Footnotes
  module Notes
    class AssignsNote < AbstractNote

      def initialize(controller)
        @assigns = controller.send(:view_assigns)
      end

      def title
        "Assigns (#{assign_keys.size})"
      end

      def valid?
        assign_keys.any?
      end

      def content
        rows = []
        assign_keys.each do |key|
          rows << [ key, escape(@assigns[key].inspect) ]
        end
        mount_table(rows.unshift(['Name', 'Value']), :class => 'name_values', :summary => "Debug information for #{title}")
      end

    protected

      def assign_keys
        @assign_keys ||= (@assigns.keys.reject{|k| k[0] == ?_ } - ignored_assigns)
      end

      def ignored_assigns
        [ "action_has_layout",
          "lookup_context",
          "view_context_class" ]
      end

    end
  end
end