class EmailToken < ActiveRecord::Base belongs_to :user validates_presence_of :token validates_presence_of :user_id validates_presence_of :email before_validation(on: :create) do self.token = EmailToken.generate_token end after_create do # Expire the previous tokens EmailToken.where(['user_id = ? and id != ?', self.user_id, self.id]).update_all 'expired = true' end def self.token_length 16 end def self.valid_after 1.week.ago end def self.unconfirmed where(confirmed: false) end def self.active where(expired: false).where('created_at > ?', valid_after) end def self.generate_token SecureRandom.hex(EmailToken.token_length) end def self.confirm(token) return unless token.present? return unless token.length/2 == EmailToken.token_length email_token = EmailToken.where("token = ? and expired = FALSE and created_at >= ?", token, EmailToken.valid_after).includes(:user).first return if email_token.blank? user = email_token.user User.transaction do row_count = EmailToken.where(id: email_token.id, expired: false).update_all 'confirmed = true' if row_count == 1 # If we are activating the user, send the welcome message user.send_welcome_message = !user.active? user.active = true user.email = email_token.email user.save! end end user rescue ActiveRecord::RecordInvalid # If the user's email is already taken, just return nil (failure) end end # == Schema Information # # Table name: email_tokens # # id :integer not null, primary key # user_id :integer not null # email :string(255) not null # token :string(255) not null # confirmed :boolean default(FALSE), not null # expired :boolean default(FALSE), not null # created_at :datetime not null # updated_at :datetime not null # # Indexes # # index_email_tokens_on_token (token) UNIQUE #