class Mail::PartsList

def attachments
  Mail::AttachmentsList.new(self)
end

def collect
  if block_given?
    ary = PartsList.new
    each { |o| ary << yield(o) }
    ary
  else
    to_a
  end
end

def sort!(order)
  sorted = self.sort do |a, b|
    # OK, 10000 is arbitrary... if anyone actually wants to explicitly sort 10000 parts of a
    # single email message... please show me a use case and I'll put more work into this method,
    # in the meantime, it works :)
    a_order = order.index(a[:content_type].string.downcase) || 10000
    b_order = order.index(b[:content_type].string.downcase) || 10000
    a_order <=> b_order
  end
  self.clear
  sorted.each { |p| self << p }
end