fab-manager/app/services/generate_token_service.rb

# frozen_string_literal: true

# Generate a unique token
class GenerateTokenService
  def call(model_class = Order)
    loop do
      token = "#{random_token}#{unique_ending}"
      break token unless model_class.exists?(token: token)
    end
  end

  private

  def random_token
    SecureRandom.urlsafe_base64(nil, false)
  end

  def unique_ending
    (Time.now.to_f * 1000).to_i
  end
end