phorge-phorge/src/applications/maniphest/policyrule/ManiphestTaskAuthorPolicyRule.php

<?php

final class ManiphestTaskAuthorPolicyRule
  extends PhabricatorPolicyRule {

  public function getRuleDescription() {
    return pht('task author');
  }

  public function canApplyToObject(PhabricatorPolicyInterface $object) {
    return ($object instanceof ManiphestTask);
  }

  public function applyRule(
    PhabricatorUser $viewer,
    $value,
    PhabricatorPolicyInterface $object) {

    $viewer_phid = $viewer->getPHID();
    if (!$viewer_phid) {
      return false;
    }

    return ($object->getAuthorPHID() == $viewer_phid);
  }

  public function getValueControlType() {
    return self::CONTROL_TYPE_NONE;
  }

}