moodle_macaroons/Macaroons/Caveat.php

<?php

namespace Macaroons;

class Caveat
{
  private $caveat_id;
  private $verification_id;
  private $caveat_location;

  public function __construct($caveatId, $verificationId = NULL, $caveatLocation = NULL)
  {
    $this->caveat_id       = $caveatId;
    $this->verification_id = $verificationId;
    $this->caveat_location = $caveatLocation;
  }

  public function getCaveatId()
  {
    return $this->caveat_id;
  }

  public function getCaveatLocation()
  {
    return $this->caveat_location;
  }

  public function getVerificationId()
  {
    return $this->verification_id;
  }

  public function setCaveatLocation($caveatLocation)
  {
    $this->caveat_location = $caveatLocation;
  }

  public function setVerificationId($verificationId)
  {
    $this->verification_id = $verificationId;
  }

  public function isFirstParty()
  {
    return $this->verification_id === NULL;
  }

  public function isThirdParty()
  {
    return !$this->isFirstParty();
  }

  public function toArray()
  {
    $caveatKeys = array('cid' => $this->getCaveatId());
    if ($this->isThirdParty())
    {
      $caveatKeys = array_merge(
                                $caveatKeys,
                                array(
                                      'vid' => $this->getVerificationId(),
                                      'cl' => $this->getCaveatLocation()
                                      )
                                );
    }
    return $caveatKeys;
  }

  public function __toString()
  {
    $caveatAsArray = $this->toArray();
    if ($this->isThirdParty())
      $caveatAsArray['vid'] = Utils::hexlify($caveatAsArray['vid']);
    return join("\n", array_map(function($key, $value) {
      return "$key $value";
    }, array_keys($caveatAsArray), $caveatAsArray));
  }

}