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PhabricatorSubscriptionsEditor.php
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Mon, Dec 2, 07:56

PhabricatorSubscriptionsEditor.php
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<?php
final class PhabricatorSubscriptionsEditor extends PhabricatorEditor {
private $object;
private $explicitSubscribePHIDs = array();
private $implicitSubscribePHIDs = array();
private $unsubscribePHIDs = array();
public function setObject(PhabricatorSubscribableInterface $object) {
$this->object = $object;
return $this;
}
/**
* Add explicit subscribers. These subscribers have explicitly subscribed
* (or been subscribed) to the object, and will be added even if they
* had previously unsubscribed.
*
* @param list<phid> List of PHIDs to explicitly subscribe.
* @return this
*/
public function subscribeExplicit(array $phids) {
$this->explicitSubscribePHIDs += array_fill_keys($phids, true);
return $this;
}
/**
* Add implicit subscribers. These subscribers have taken some action which
* implicitly subscribes them (e.g., adding a comment) but it will be
* suppressed if they've previously unsubscribed from the object.
*
* @param list<phid> List of PHIDs to implicitly subscribe.
* @return this
*/
public function subscribeImplicit(array $phids) {
$this->implicitSubscribePHIDs += array_fill_keys($phids, true);
return $this;
}
/**
* Unsubscribe PHIDs and mark them as unsubscribed, so implicit subscriptions
* will not resubscribe them.
*
* @param list<phid> List of PHIDs to unsubscribe.
* @return this
*/
public function unsubscribe(array $phids) {
$this->unsubscribePHIDs += array_fill_keys($phids, true);
return $this;
}
public function save() {
if (!$this->object) {
throw new PhutilInvalidStateException('setObject');
}
$actor = $this->requireActor();
$src = $this->object->getPHID();
if ($this->implicitSubscribePHIDs) {
$unsub = PhabricatorEdgeQuery::loadDestinationPHIDs(
$src,
PhabricatorObjectHasUnsubscriberEdgeType::EDGECONST);
$unsub = array_fill_keys($unsub, true);
$this->implicitSubscribePHIDs = array_diff_key(
$this->implicitSubscribePHIDs,
$unsub);
}
$add = $this->implicitSubscribePHIDs + $this->explicitSubscribePHIDs;
$del = $this->unsubscribePHIDs;
// If a PHID is marked for both subscription and unsubscription, treat
// unsubscription as the stronger action.
$add = array_diff_key($add, $del);
if ($add || $del) {
$u_type = PhabricatorObjectHasUnsubscriberEdgeType::EDGECONST;
$s_type = PhabricatorObjectHasSubscriberEdgeType::EDGECONST;
$editor = new PhabricatorEdgeEditor();
foreach ($add as $phid => $ignored) {
$editor->removeEdge($src, $u_type, $phid);
$editor->addEdge($src, $s_type, $phid);
}
foreach ($del as $phid => $ignored) {
$editor->removeEdge($src, $s_type, $phid);
$editor->addEdge($src, $u_type, $phid);
}
$editor->save();
}
}
}

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