private function canAuthorViewObject(HeraldRule $rule, HeraldAdapter $adapter)
{
// Authorship is irrelevant for global rules and object rules.
if ($rule->isGlobalRule() || $rule->isObjectRule()) {
return true;
}
// The author must be able to create rules for the adapter's content type.
// In particular, this means that the application must be installed and
// accessible to the user. For example, if a user writes a Differential
// rule and then loses access to Differential, this disables the rule.
$enabled = HeraldAdapter::getEnabledAdapterMap($rule->getAuthor());
if (empty($enabled[$adapter->getAdapterContentType()])) {
return false;
}
// Finally, the author must be able to see the object itself. You can't
// write a personal rule that CC's you on revisions you wouldn't otherwise
// be able to see, for example.
$object = $adapter->getObject();
return PhabricatorPolicyFilter::hasCapability($rule->getAuthor(), $object, PhabricatorPolicyCapability::CAN_VIEW);
}