require_relative 'arg_loader'

module Squib::Args
  module_function def extract_svg_special(opts, deck)
    SvgSpecial.new.extract! opts, deck
  end
  
  class SvgSpecial
    include ArgLoader

    def self.parameters
      { data: nil, id: nil, force_id: false }
    end

    def self.expanding_parameters
      parameters.keys # all of them
    end

    def self.params_with_units
      []
    end

    def validate_id(arg, _i)
      return nil if arg.to_s.empty?
      arg = '#' << arg unless arg.start_with? '#'
      arg
    end

    # Only render if we have an ID specified, or we are forcing an ID
    def render?(i)
      return false if force_id[i] && id[i].to_s.empty?
      return true
    end

  end

end