# == Schema Information
#
# Table name: users
#
# id                        | int(11)      | NO   | PRI | NULL    | auto_increment |
# login                     | varchar(255) | YES  |     | NULL    |                |
# email                     | varchar(255) | YES  |     | NULL    |                |
# crypted_password          | varchar(40)  | YES  |     | NULL    |                |
# salt                      | varchar(40)  | YES  |     | NULL    |                |
# created_at                | datetime     | YES  |     | NULL    |                |
# updated_at                | datetime     | YES  |     | NULL    |                |
# remember_token            | varchar(255) | YES  |     | NULL    |                |
# remember_token_expires_at | datetime     | YES  |     | NULL    |                |
# activated_at              | datetime     | YES  |     | NULL    |                |


require 'digest/sha1'
class User < ActiveRecord::Base

  has_many                  :accounts

  # Virtual attribute for the unencrypted password
  attr_accessor :password

  validates_presence_of     :login, :email
  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_length_of       :login,    :within => 3..40
  validates_length_of       :email,    :within => 3..100

  validates_confirmation_of :password,                   :if => :password_required?

  validates_uniqueness_of   :login, :email, :case_sensitive => false

  before_save :encrypt_password
  # before_create :make_activation_code
  # 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, :email, :password, :password_confirmation

  def active?
    # the existence of an activation at means they have been activated
    #puts self.activated_at
    self.activated_at.nil? == false
  end

  # Authenticates a user by their login name and unencrypted password.  Returns the user or nil.
  def self.authenticate(login, password)
    u = find :first, :conditions => ['login = ?', login] # need to get the salt
    u && u.authenticated?(password) ? u : nil
  end

  # Encrypts some data with the salt.
  def self.encrypt(password, salt)
    Digest::SHA1.hexdigest("--#{salt}--#{password}--")
  end

  # Encrypts the password with the user salt
  def encrypt(password)
    self.class.encrypt(password, salt)
  end

  def authenticated?(password)
    crypted_password == encrypt(password)
  end

  def remember_token?
    remember_token_expires_at && Time.now.utc < remember_token_expires_at
  end

  # These create and unset the fields required for remembering users between browser closes
  def remember_me
    remember_me_for 2.weeks
  end

  def remember_me_for(time)
    remember_me_until time.from_now.utc
  end

  def remember_me_until(time)
    self.remember_token_expires_at = time
    self.remember_token            = encrypt("#{email}--#{remember_token_expires_at}")
    save(false)
  end

  def forget_me
    self.remember_token_expires_at = nil
    self.remember_token            = nil
    save(false)
  end

  # Returns true if the user has just been activated.
  def recently_activated?
    @activated
  end

  protected
    # before filter
    def encrypt_password
      return if password.blank?
      self.salt = Digest::SHA1.hexdigest("--#{Time.now.to_s}--#{login}--") if new_record?
      self.crypted_password = encrypt(password)
    end

    def password_required?
      crypted_password.blank? || !password.blank?
    end

end