module Danger
  module Changelog
    module Config
      extend self

      attr_accessor :placeholder_line

      def placeholder_line=(value)
        if value
          new_value = value
          new_value = "* #{new_value}" unless new_value.start_with?('* ')
          new_value = "#{new_value}\n" unless new_value.end_with?("\n")
          @placeholder_line = new_value
        else
          @placeholder_line = nil
        end
      end

      def placeholder_line?
        !@placeholder_line.nil?
      end

      def reset
        self.placeholder_line = "* Your contribution here.\n"
      end

      reset
    end

    class << self
      def configure
        block_given? ? yield(Config) : Config
      end

      def config
        Config
      end
    end
  end
end