heartcombo--devise/lib/devise/models/perishable.rb

module Devise
  module Perishable

    def self.included(base)
      base.class_eval do
        extend ClassMethods

        before_create :reset_perishable_token
      end
    end

    # Generates a new random token for confirmation, based on actual Time and salt
    #
    def reset_perishable_token
      self.perishable_token = secure_digest(Time.now.utc, random_string, password)
    end

    # Resets the perishable token with and save the record without validating
    #
    def reset_perishable_token!
      reset_perishable_token and save(false)
    end

    module ClassMethods

      # Attempt to find a user by and incoming perishable_token. If no user is
      # found, initialize a new one and adds an :invalid error to perishable_token
      #
      def find_or_initialize_with_error_by_perishable_token(perishable_token)
        perishable = find_or_initialize_by_perishable_token(perishable_token)
        if perishable.new_record?
          perishable.errors.add(:perishable_token, :invalid, :default => "invalid confirmation")
        end
        perishable
      end
    end
  end
end