#
# = clothesline.rb
#
# *Cloth chainer.
#
# Copyright (c) 2004  Christian Neukirchen <chneukirchen@gmail.com>
#
# Written & maintained by Christian Neukirchen
# <http://purl.org/net/chneukirchen>
#
# This program is free software. You can re-distribute and/or
# modify this program under the same terms of ruby itself ---
# Ruby Distribution License or GNU General Public License.
#

class ClothesLine
  def self.parse(string, override=Object)
    instance = new *string.strip.split(/[ ,|]+/).map { |klass|
      unless override.constants.include? klass
        require klass.downcase.gsub(/::/, '/')
      end
      override.const_get(klass)
    }
    instance.instance_eval { @override = override }
    instance
  end

  attr_reader :classes

  def initialize(*classes)
    @classes = classes
    @override = Object
  end

  def new(str)                  # Fake instantiation!
    @result = @classes.inject(str) { |result, klass|
      if klass.kind_of? Array
        klass.first.new(result).to_html(*klass[1..-1])
      else
        klass.new(result).to_html
      end
    }
    self
  end

  def to_html
    @result
  end

  def to_clothesline
    @classes.map { |c| c.to_s.gsub(/#{@override}::/, '') }.join(" ")
  end

  def ==(other)
    @classes == other.classes
  end
end