hobo cents rich type

class HoboType::Cents < DelegateClass(Fixnum)

  COLUMN_TYPE = :integer

  HoboFields.register_type(:cents, self)

  def initialize(value)
    super(centsify value)
  end

  def to_s
    sprintf("%.2f", self.to_f / 100)
  end

  def to_microformat
    '<span class="money">' +
      '<abbr class="currency" title="USD">$</abbr>' +
      '<span class="amount">' + to_s + '</span>' +
    '</span>'
  end

  def to_rdfa
    '<span property="commerce:currency" content="USD">$</span>' +
    '<span property="commerce:amount" datatype="xsd:decimal">' + to_s + '</span>'
  end

  def to_html(xmldoctype = true)
    to_microformat
  end

  private

  def centsify(value)
    case value
    when String
      # string to cents stolen from the money gem
      value.insert(0,'0') if value =~ /^\./
      matches = value.scan /(\-?[\d,]+(\.(\d+))?)/
      matches[0] ? (matches[0][0].gsub(',', '').to_f * 100).round : 0
    when Float
      (value * 100).round
    when Fixnum
      value
    end
  end

end