PhoneVerificationDeliveryService

phone_verification_delivery_service.rb

class Account::PhoneVerificationDeliveryService
  PHONE_NUMBER = Rails.application.secrets.twilio['phone_number'] if Rails.application.secrets.twilio

  attr_reader :account, :errors

  def initialize(account)
    @account = account
    @errors = []
  end

  def send_verification
    generate_verification_code_if_needed!

    send_verification_code!.tap do |result|
      account.update_column(:phone_verification_sent_at, Time.zone.now) if result
    end
  end

  def force_code_generation!
    @force_code_generation = true
  end

  def force_code_generation?
    !!@force_code_generation
  end

  private

  def send_verification_code!
    twilio_client.messages.create(to: formatted_phone_number, from: PHONE_NUMBER,
                                  body: message)
  rescue Twilio::REST::RequestError => e
    @errors << e.message
    Rails.logger.error(e.message)
    false
  end

  def twilio_client
    @twilio_client ||= Twilio::REST::Client.new
  end

  def formatted_phone_number
    "+1#{account.phone.tr('-', '')}"
  end

  def generate_verification_code_if_needed!
    return if !force_code_generation? &&
        account.phone_verification_code.present? && !verification_code_expired?

    account.update_column(:phone_verification_code, generate_phone_verification_code)
  end

  def verification_code_expired?
    account.phone_verification_sent_at &&
        account.phone_verification_sent_at < Account::PHONE_VERIFICATION_TTL.ago
  end

  def generate_phone_verification_code
    rand(0000..9999).to_s.rjust(4, '0')
  end

  def message
    I18n.t('account.phone_verification.message', code: account.phone_verification_code)
  end
end