class User < ActiveRecord::Base
  
  include PasswordEncryption
  
  # Virtual attribute for the unencrypted password
  attr_accessor :password

  validates_presence_of     :login
  validates_presence_of     :password,                   :if => :password_required?
  validates_presence_of     :password_confirmation,      :if => :password_required?
  validates_length_of       :password, :within => 4..40, :if => :password_required?
  validates_confirmation_of :password,                   :if => :password_required?
  validates_length_of       :login,    :within => 3..40
  validates_uniqueness_of   :login, :case_sensitive => false
  before_save :encrypt_password
  
  # prevents a user from submitting a crafted form that bypasses activation
  # anything else you want your user to change should be added here.
  attr_accessible :login, :password, :password_confirmation, :readwrite
  
  # Authenticates a user by their login name and unencrypted password.  Returns the user or nil.
  def self.authenticate(login, password)
    u = find_by_login(login) # need to get the salt
    u && u.authenticated?(password) ? u : nil
  end
end
