class <%= @model_name %>

include Mongoid::Document
attr_accessor :password, :password_confirmation

# Fields
field :name,             :type => String
field :surname,          :type => String
field :email,            :type => String
field :crypted_password, :type => String
field :role,             :type => String

# Validations
validates_presence_of     :email, :role
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       :email,    :within => 3..100
validates_uniqueness_of   :email,    :case_sensitive => false
validates_format_of       :email,    :with => /\A([^@\s]+)@((?:[-a-z0-9]+\.)+[a-z]{2,})\Z/i
validates_format_of       :role,     :with => /[A-Za-z]/

# Callbacks
before_save :encrypt_password, :if => :password_required

##
# This method is for authentication purpose.
#
def self.authenticate(email, password)
  account = where(:email => /#{Object::Regexp.escape(email)}/i).first if email.present?
  account && account.has_password?(password) ? account : nil
end

##
# This method is used by AuthenticationHelper.
#
def self.find_by_id(id)
  find(id) rescue nil
end

def has_password?(password)
  ::BCrypt::Password.new(crypted_password) == password
end

private

def encrypt_password
  self.crypted_password = ::BCrypt::Password.create(self.password)
end

def password_required
  crypted_password.blank? || self.password.present?
end

end