String.to_permalink

Converts a string to a URL style permalink.

class String
  def to_permalink
    s = self
    s = Iconv.iconv('ascii//ignore//translit', 'utf-8', s).to_s
    s.gsub!(/^W+|W+$/, '')
    s.gsub!(/W+/, '-')
    s.strip!
    s.downcase!
    s.squeeze!(' ')
    s.gsub(/ +/, '-')
  end
end