glebm/order_query

# frozen_string_literal: true

module OrderQuery
  # Responsible for handling :asc and :desc
  module Direction
    module_function

    DIRECTIONS = %i[asc desc].freeze

    def all
      DIRECTIONS
    end

    # @param [:asc, :desc] direction
    # @return [:asc, :desc]
    def reverse(direction)
      all[(all.index(direction) + 1) % 2].to_sym
    end

    # @param [:asc, :desc] direction
    # @raise [ArgumentError]
    # @return [:asc, :desc]
    def parse!(direction)
      all.include?(direction) && direction or
        fail ArgumentError,
             "sort direction must be in #{all.map(&:inspect).join(', ')}, "\
             "is #{direction.inspect}"
    end
  end
end