services/api/lib/assign_uuid.rb

   1 module AssignUuid
   2
   3   def self.included(base)
   4     base.extend(ClassMethods)
   5     base.before_create :assign_uuid
   6   end
   7
   8   module ClassMethods
   9     def uuid_prefix
  10       Digest::MD5.hexdigest(self.to_s).to_i(16).to_s(36)[-5..-1]
  11     end
  12     def generate_uuid
  13       [Server::Application.config.uuid_prefix,
  14        self.uuid_prefix,
  15        rand(2**256).to_s(36)[-15..-1]].
  16         join '-'
  17     end
  18   end
  19
  20   protected
  21
  22   def respond_to_uuid?
  23     self.respond_to? :uuid
  24   end
  25
  26   def assign_uuid
  27     return true if !self.respond_to_uuid?
  28     return true if uuid and current_user and current_user.is_admin
  29     self.uuid = self.class.generate_uuid
  30   end
  31 end