user.rb

# == Schema Information
#
# Table name: users
#
#  id                     :integer          not null, primary key
#  email                  :string(255)      default(""), not null
#  encrypted_password     :string(255)      default("")
#  reset_password_token   :string(255)
#  reset_password_sent_at :datetime
#  remember_created_at    :datetime
#  sign_in_count          :integer          default(0)
#  current_sign_in_at     :datetime
#  last_sign_in_at        :datetime
#  current_sign_in_ip     :string(255)
#  last_sign_in_ip        :string(255)
#  confirmation_token     :string(255)
#  confirmed_at           :datetime
#  confirmation_sent_at   :datetime
#  unconfirmed_email      :string(255)
#  failed_attempts        :integer          default(0)
#  unlock_token           :string(255)
#  locked_at              :datetime
#  authentication_token   :string(255)
#  deleted_at             :datetime
#  created_at             :datetime
#  updated_at             :datetime
#  name                   :string(255)
#  invitation_token       :string(60)
#  invitation_sent_at     :datetime
#  invitation_accepted_at :datetime
#  invitation_limit       :integer
#  invited_by_id          :integer
#  invited_by_type        :string(255)
#  tenant_id              :integer
#  locale                 :string(255)
#  channel                :string(255)
#

class User < ActiveRecord::Base
  include Gravtastic

  # Include default devise modules. Others available are:
  # :omniauthable, :registerable,
  devise :invitable, :database_authenticatable,  :confirmable,
         :recoverable, :rememberable, :trackable, :validatable,
         :lockable, :timeoutable, :token_authenticatable

  #has_and_belongs_to_many :tenants
  belongs_to :tenant

  has_paper_trail
  rolify

  before_create :generate_channel
  before_save :ensure_authentication_token

  validates :email, presence: true, uniqueness: true

  private

  def generate_channel
    self.channel = loop do
      random_token = SecureRandom.urlsafe_base64(nil, false)
      break random_token unless self.class.exists?(channel: random_token)
    end
  end

end