#-----Model

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




  # ---------------------------------------
  # The following code has been generated by role_requirement.
  # You may wish to modify it to suit your need
  has_and_belongs_to_many  :roles, :join_table => 'roles_users'
  #belongs_to :role
  attr_protected :roles


  # has_role? simply needs to return true or false whether a user has a role or not.
  # It may be a good idea to have "admin" roles return true always
  def has_role?(role_in_question)
    @_list ||= self.roles.collect(&:name)
    return true if @_list.include?("admin")
    (@_list.include?(role_in_question.to_s) )
  end
  # ---------------------------------------




  # 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_confirmation_of :password,                   :if => :password_required?
  validates_length_of       :login,    :within => 3..40
  validates_length_of       :email,    :within => 3..100
  validates_uniqueness_of   :login, :email, :case_sensitive => false
  before_save :encrypt_password

  # 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

  # 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
    self.remember_token_expires_at = 2.weeks.from_now.utc
    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

  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
  def label
  login
end
end




#------controller

class UsersController < ApplicationController
  # Be sure to include AuthenticationSystem in Application Controller instead
require_role "user"
   before_filter :load_user, :login_required
   def load_user
    @user=current_user
    rolearr=@user.roles
    rolearr.each    do |a|
      @role=a.name
    end
  end
  # render new.rhtml
  def new
   @roles=Role.find:all

  end

    active_scaffold :user do |config|

    config.columns = [:id,:login, :email,:created_at, :roles]
    config.update.columns = [:login, :email,:password,:password_confirmation]

  end




  def create

    cookies.delete :auth_token
    # protects against session fixation attacks, wreaks havoc with
    # request forgery protection.
    # uncomment at your own risk
    # reset_session
    @user = User.new(params[:user])
    @user.save


    if @user.errors.empty
      self.current_user = @user
      redirect_back_or_default('/')
      flash[:notice] = "Thanks for signing up!"
    else
      render :action => 'new'
    end


  end

end


#-----View

<%= error_messages_for :user %>
<% form_for :user, :url => users_path do |f| -%>
<p><label for="login">Login</label><br/>
<%= f.text_field :login %></p>

<p><label for="email">Email</label><br/>
<%= f.text_field :email %></p>

<p><label for="password">Password</label><br/>
<%= f.password_field :password %></p>

<p><label for="password_confirmation">Confirm Password</label><br/>
<%= f.password_field :password_confirmation %></p>


 <select id="role" name="role">
<p><label for="role">role</label><br/>
<%= options_from_collection_for_select(@roles,"id","name")  %></p>
</select>
<p><%= submit_tag 'Sign up' %></p>
<% end -%>