osem-fcy/app/models/user.rb

class User < ActiveRecord::Base

  # Include default devise modules. Others available are:
  # :token_authenticatable, :confirmable,
  # :lockable, :timeoutable and :omniauthable
  devise :database_authenticatable, :registerable,
         :recoverable, :rememberable, :trackable, :validatable, :confirmable,
         :omniauthable, omniauth_providers: [:novell, :google, :facebook]

  has_and_belongs_to_many :roles
  has_one :person, :inverse_of => :user
  has_many :openids

  attr_accessible :email, :password, :password_confirmation, :remember_me, :role_id, :role_ids,
                  :person_attributes
  accepts_nested_attributes_for :person
  accepts_nested_attributes_for :roles

  before_create :setup_role
  before_create :create_person

  delegate :last_name, :first_name, :public_name, to: :person

  # Searches for user based on email. Returns found user or new user.
  # ====Returns
  # * +User::ActiveRecord_Relation+ -> user
  def self.find_for_auth(auth, current_user = nil)
    user = current_user

    if user.nil? # No current user available, user is not already logged in
      user = User.where(email: auth.info.email).first_or_initialize
    end

    if user.new_record?
      user.email = auth.info.email
      user.password = Devise.friendly_token[0, 20]
      user.skip_confirmation!
    end

    user
  end

  def role?(role)
    Rails.logger.debug("Checking role in user")
    !!roles.find_by_name(role.to_s.downcase.camelize)
  end

  def get_roles
    return self.roles
  end

  def setup_role
    roles << Role.find_by(name: 'Admin') if User.count == 0
    roles << Role.find_by(name: 'Participant') if roles.empty?
  end

  def popup_details
    details = "<b>Sign-in Count</b><br>"
    details += "#{self.sign_in_count}<br>"
    details += "<b>Current Sign-in</b><br>"
    details += "#{self.current_sign_in_at}<br>"
    details += "<b>Last Sign-in</b><br>"
    details += "#{self.last_sign_in_at}<br>"
    details += "<b>Current Sign-in IP</b><br>"
    details += "#{self.current_sign_in_ip}<br>"
    details += "<b>Last Sign-in IP</b><br>"
    details += "#{self.last_sign_in_ip}<br>"
    details += "<b>Created at</b><br>"
    details += "#{self.created_at}<br>"
  end

  def confirmed?
    !confirmed_at.nil?
  end

  private
  def create_person
    # TODO Search people for existing email address, add to their account
    build_person(email: email) if person.nil?
    true
  end
end