module Doorkeeper::OAuth::Helpers::UniqueToken

def self.default_generator_method
  Doorkeeper.config.default_generator_method
end

def self.generate(options = {})
  # Access Token value must be 1*VSCHAR or
  # 1*( ALPHA / DIGIT / "-" / "." / "_" / "~" / "+" / "/" ) *"="
  #
  # @see https://datatracker.ietf.org/doc/html/rfc6749#appendix-A.12
  # @see https://datatracker.ietf.org/doc/html/rfc6750#section-2.1
  #
  generator = options.delete(:generator) || SecureRandom.method(default_generator_method)
  token_size = options.delete(:size) || 32
  generator.call(token_size)
end