module Wco::Utils

def set_slug
  return if !slug.blank?
  if defined? name
    new_slug = name.downcase.gsub(/[^a-z0-9\s]/i, '').gsub(' ', '-')
  else
    new_slug = '1'
  end
  if self.class.where( slug: new_slug ).first
    loop do
      if new_slug[new_slug.length-1].to_i != 0
        # inrement last digit
        last_digit = new_slug[new_slug.length-1].to_i
        new_slug = "#{new_slug[0...new_slug.length-1]}#{last_digit+1}"
      else
        # add '-1' to the end
        new_slug = "#{new_slug}-1"
      end
      break if !self.class.where( slug: new_slug ).first
    end
  end
  self.slug = new_slug
end