Sometimes you just need objects that spew placeholder strings

supplant_template.rb

# Sometimes you just need objects that spew placeholder strings
#
# Regular supplant style http://javascript.crockford.com/remedial.html
# >> x = SupplantTemplate.new
# => ""
# >> x.client.company_name
# => "{client_company_name}"
# >> x.client
# => "{client}"
# >> x.id
# => "{id}"
# >> x.description
# => "{description}"
#
# or Mustache style http://mustache.github.com/
# >> x = SupplantTemplate.new('', '{{', '}}')
# => ""
# >> x.client.company_name
# => "{{client_company_name}}"
# >> x.client
# => "{{client}}"
# >> x.id
# => "{{id}}"
#

class SupplantTemplate < String
  def initialize(string = '', lquo = '{', rquo = '}')
    @lquo = lquo
    @rquo = rquo
    super(string)
  end
  def id
    method_missing(:id)
  end
  def method_missing(symbol, *args)
    parts = (self == '' ? [symbol] : [self.gsub(@lquo, '').gsub(@rquo, ''), symbol])
    self.class.new("#{@lquo}#{parts.join('_')}#{@rquo}", @lquo, @rquo)
  end
end