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phab/src/applications/system/engine/PhabricatorDestructionEngine.php
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PhabricatorDestructionEngine.php
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<?php
final class PhabricatorDestructionEngine extends Phobject {
private $rootLogID;
public function destroyObject(PhabricatorDestructableInterface $object) {
$log = id(new PhabricatorSystemDestructionLog())
->setEpoch(time())
->setObjectClass(get_class($object));
if ($this->rootLogID) {
$log->setRootLogID($this->rootLogID);
}
$object_phid = null;
if (method_exists($object, 'getPHID')) {
try {
$object_phid = $object->getPHID();
$log->setObjectPHID($object_phid);
} catch (Exception $ex) {
// Ignore.
}
}
if (method_exists($object, 'getMonogram')) {
try {
$log->setObjectMonogram($object->getMonogram());
} catch (Exception $ex) {
// Ignore.
}
}
$log->save();
if (!$this->rootLogID) {
$this->rootLogID = $log->getID();
}
$object->destroyObjectPermanently($this);
if ($object_phid) {
$this->destroyEdges($object_phid);
if ($object instanceof PhabricatorApplicationTransactionInterface) {
$template = $object->getApplicationTransactionTemplate();
$this->destroyTransactions($template, $object_phid);
}
}
// TODO: PhabricatorFlaggableInterface
// TODO: PhabricatorTokenReceiverInterface
}
private function destroyEdges($src_phid) {
try {
$edges = id(new PhabricatorEdgeQuery())
->withSourcePHIDs(array($src_phid))
->execute();
} catch (Exception $ex) {
// This is (presumably) a "no edges for this PHID type" exception.
return;
}
$editor = new PhabricatorEdgeEditor();
foreach ($edges as $type => $type_edges) {
foreach ($type_edges as $src => $src_edges) {
foreach ($src_edges as $dst => $edge) {
$editor->removeEdge($edge['src'], $edge['type'], $edge['dst']);
}
}
}
$editor->save();
}
private function destroyTransactions(
PhabricatorApplicationTransaction $template,
$object_phid) {
$xactions = $template->loadAllWhere('objectPHID = %s', $object_phid);
foreach ($xactions as $xaction) {
$this->destroyObject($xaction);
}
}
}
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