=begin rdoc
iCookWare User model class: doing some user management here. This class is automatically generated using Login Generator
Author::Ana Kovatcheva
Copyright:: iCookWare Team 2005
=end
require 'digest/sha1'

# this model expects a certain database layout and its based on the name/login pattern. 
class User < ActiveRecord::Base

  #AK: trying to refer to settings and queries
	has_one :setting
	has_many :queries

  # Please change the salt to something else, 
  # Every application should use a different one 
  @@salt = 'change-me'
  cattr_accessor :salt

  # Authenticate a user. 
  #
  # Example:
  #   @user = User.authenticate('bob', 'bobpass')
  #
  def self.authenticate(login, pass)
    find_first(["login = ? AND password = ?", login, sha1(pass)])
  end  
  

  protected

  # Apply SHA1 encryption to the supplied password. 
  # We will additionally surround the password with a salt 
  # for additional security. 
  def self.sha1(pass)
    Digest::SHA1.hexdigest("#{salt}--#{pass}--")
  end
    
  before_create :crypt_password

 # after_create: Create a setting for a user after he has signed up and map the the setting to the user_id
	
 	def after_create 
		create_setting
	end
	
 # before_destroy: get the current user id
 	def before_destroy 
     	#Setting.find(:first,:conditions => ["user_id = ?", self.id]).destroy
      setting.destroy 
			queries.delete
	end	
 
  # Before saving the record to database we will crypt the password 
  # using SHA1. 
  # We never store the actual password in the DB.
  def crypt_password
    write_attribute "password", self.class.sha1(password)
  end
  
  before_update :crypt_unless_empty
  
  # If the record is updated we will check if the password is empty.
  # If its empty we assume that the user didn't want to change his
  # password and just reset it to the old value.
  def crypt_unless_empty
    if password.empty?      
      user = self.class.find(self.id)
      self.password = user.password
    else
      write_attribute "password", self.class.sha1(password)
    end        
  end  
  
  validates_uniqueness_of :login, :on => :create

  validates_confirmation_of :password
  validates_length_of :login, :within => 3..40
  validates_length_of :password, :within => 5..40
  validates_presence_of :login, :password, :password_confirmation
end