require 'digest/sha1'

class User < ActiveRecord::Base

  validates_presence_of :name, :email, :password, :password_confirmation
  validates_uniqueness_of :name

  attr_accessor :password_confirmation
  validates_confirmation_of :password

  def validate
    errors.add_to_base("missing password") if hashed_password.blank?
    errors.add_to_base("missing email adress") if email.blank?
  end

  def self.authenticate(name, password)
    user = self.find_by_name(name)
    if user
      if user.hashed_password != encrypted_password(password)
        user = nil
      end
    end
    user
  end

  def password
    @password
  end

  def password=(pwd)
    @password = pwd
    return if pwd.blank?
    self.hashed_password = User.encrypted_password(self.password)
  end

  def name
    self.name
  end

  private

  def self.encrypted_password(password)
    Digest::SHA1.hexdigest(password)
  end

end