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PhabricatorSubscriptionsSubscribersPolicyRule.php
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Wed, Jan 8, 08:32

PhabricatorSubscriptionsSubscribersPolicyRule.php
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<?php
final class PhabricatorSubscriptionsSubscribersPolicyRule
extends PhabricatorPolicyRule {
private $subscribed = array();
private $sourcePHIDs = array();
public function getObjectPolicyKey() {
return 'subscriptions.subscribers';
}
public function getObjectPolicyName() {
return pht('Subscribers');
}
public function getPolicyExplanation() {
return pht('Subscribers can take this action.');
}
public function getRuleDescription() {
return pht('subscribers');
}
public function canApplyToObject(PhabricatorPolicyInterface $object) {
return ($object instanceof PhabricatorSubscribableInterface);
}
public function willApplyRules(
PhabricatorUser $viewer,
array $values,
array $objects) {
// We want to let the user see the object if they're a subscriber or
// a member of any project which is a subscriber. Additionally, because
// subscriber state is complex, we need to read hints passed from
// the TransactionEditor to predict policy state after transactions apply.
$viewer_phid = $viewer->getPHID();
if (!$viewer_phid) {
return;
}
if (empty($this->subscribed[$viewer_phid])) {
$this->subscribed[$viewer_phid] = array();
}
// Load the project PHIDs the user is a member of. We use the omnipotent
// user here because projects may themselves have "Subscribers" visibility
// policies and we don't want to get stuck in an infinite stack of
// recursive policy checks. See T13106.
if (!isset($this->sourcePHIDs[$viewer_phid])) {
$projects = id(new PhabricatorProjectQuery())
->setViewer(PhabricatorUser::getOmnipotentUser())
->withMemberPHIDs(array($viewer_phid))
->execute();
$source_phids = mpull($projects, 'getPHID');
$source_phids[] = $viewer_phid;
$this->sourcePHIDs[$viewer_phid] = $source_phids;
}
// Look for transaction hints.
foreach ($objects as $key => $object) {
$cache = $this->getTransactionHint($object);
if ($cache === null) {
// We don't have a hint for this object, so we'll deal with it below.
continue;
}
// We have a hint, so use that as the source of truth.
unset($objects[$key]);
foreach ($this->sourcePHIDs[$viewer_phid] as $source_phid) {
if (isset($cache[$source_phid])) {
$this->subscribed[$viewer_phid][$object->getPHID()] = true;
break;
}
}
}
$phids = mpull($objects, 'getPHID');
if (!$phids) {
return;
}
$edge_query = id(new PhabricatorEdgeQuery())
->withSourcePHIDs($this->sourcePHIDs[$viewer_phid])
->withEdgeTypes(
array(
PhabricatorSubscribedToObjectEdgeType::EDGECONST,
))
->withDestinationPHIDs($phids);
$edge_query->execute();
$subscribed = $edge_query->getDestinationPHIDs();
if (!$subscribed) {
return;
}
$this->subscribed[$viewer_phid] += array_fill_keys($subscribed, true);
}
public function applyRule(
PhabricatorUser $viewer,
$value,
PhabricatorPolicyInterface $object) {
$viewer_phid = $viewer->getPHID();
if (!$viewer_phid) {
return false;
}
if ($object->isAutomaticallySubscribed($viewer_phid)) {
return true;
}
$subscribed = idx($this->subscribed, $viewer_phid);
return isset($subscribed[$object->getPHID()]);
}
public function getValueControlType() {
return self::CONTROL_TYPE_NONE;
}
}

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