2 class <%= class_name %> < ActiveRecord::Base
3 # Virtual attribute for the unencrypted password
4 attr_accessor :password
6 validates_presence_of :login, :email
7 validates_presence_of :password, :if => :password_required?
8 validates_presence_of :password_confirmation, :if => :password_required?
9 validates_length_of :password, :within => 4..40, :if => :password_required?
10 validates_confirmation_of :password, :if => :password_required?
11 validates_length_of :login, :within => 3..40
12 validates_length_of :email, :within => 3..100
13 validates_uniqueness_of :login, :email, :case_sensitive => false
14 before_save :encrypt_password
16 # Authenticates a user by their login name and unencrypted password. Returns the user or nil.
17 def self.authenticate(login, password)
18 u = find_by_login(login) # need to get the salt
19 u && u.authenticated?(password) ? u : nil
22 # Encrypts some data with the salt.
23 def self.encrypt(password, salt)
24 Digest::SHA1.hexdigest("--#{salt}--#{password}--")
27 # Encrypts the password with the user salt
29 self.class.encrypt(password, salt)
32 def authenticated?(password)
33 crypted_password == encrypt(password)
37 remember_token_expires_at && Time.now.utc < remember_token_expires_at
40 # These create and unset the fields required for remembering users between browser closes
42 self.remember_token_expires_at = 2.weeks.from_now.utc
43 self.remember_token = encrypt("#{email}--#{remember_token_expires_at}")
48 self.remember_token_expires_at = nil
49 self.remember_token = nil
56 return if password.blank?
57 self.salt = Digest::SHA1.hexdigest("--#{Time.now.to_s}--#{login}--") if new_record?
58 self.crypted_password = encrypt(password)
61 def password_required?
62 crypted_password.blank? || !password.blank?