demarches-normaliennes/app/models/api_entreprise_token.rb

class APIEntrepriseToken
  TokenError = Class.new(StandardError)

  def initialize(token)
    @token = token
  end

  def token
    raise TokenError, I18n.t("api_entreprise.errors.missing_token") if @token.blank?

    @token
  end

  def expired?
    decoded_token.key?("exp") && decoded_token["exp"] <= Time.zone.now.to_i
  end

  def role?(role)
    roles.include?(role)
  end

  private

  def roles
    Array(decoded_token["roles"] || decoded_token["scopes"])
  end

  def decoded_token
    @decoded_token ||= {}
    @decoded_token[token] ||= JWT.decode(token, nil, false)[0]
  rescue JWT::DecodeError => e
    raise TokenError, e.message
  end
end