module Robot
  module Commands
    class Move < Base
      MOVE = 'MOVE'.freeze

      def self.matches?(command)
        command == MOVE
      end

      def self.call(position)
        {
          Robot::Directions::NORTH => position.north,
          Robot::Directions::SOUTH => position.south,
          Robot::Directions::EAST  => position.east,
          Robot::Directions::WEST  => position.west,
        }.fetch(position.direction)
      end
    end
  end
end