module Care
  class JwtService
    def decode(token)
      decoded_token = JWT.decode(token, public_key, true, algorithm: 'RS256')
      HashWithIndifferentAccess.new(decoded_token[0])
    end

    def encode(payload)
      JWT.encode(payload, secret_key, 'RS256')
    end

    private

    def public_key
      key = File.read(ENV['JWT_SECRET_PATH'])
      OpenSSL::PKey::RSA.new(key)
    end

    def secret_key
      key = File.read(ENV['JWT_SECRET_PATH'])
      OpenSSL::PKey::RSA.new(key)
    end
  end
end