app/models/authorization.rb


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# frozen_string_literal: true

class Authorization < ApplicationRecord
  audited associated_with: :user
  has_secure_token :code
  belongs_to :user
  belongs_to :client
  has_many :tokens, dependent: :delete_all
  enum challenge_method: { plain: 0, sha256: 1 }

  scope :active, -> { where.not(id: revoked.or(where(id: expired))) }
  scope :revoked, -> { where('revoked_at < ?', Time.current) }
  scope :expired, -> { where('expired_at < ?', Time.current) }

  after_initialize do
    self.expired_at = 10.minutes.from_now if expired_at.blank?
  end

  def valid_verifier?(code_verifier)
    return true if challenge.blank?

    challenge ==
      if sha256?
        Base64.urlsafe_encode64(Digest::SHA256.hexdigest(code_verifier))
      else
        code_verifier
      end
  end

  def issue_tokens_to(client, token_types: [:access, :refresh])
    transaction do
      revoke!
      token_types.map do |x|
        tokens.create!(subject: user, audience: client, token_type: x)
      end
    end
  end

  def revoke!
    raise 'already revoked' if revoked?

    now = Time.current
    update!(revoked_at: now)
    tokens.update_all(revoked_at: now)
  end

  def revoked?
    revoked_at.present?
  end
end