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phorge/src/applications/subscriptions/engineextension/PhabricatorSubscriptionsCurtainExtension.php
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PhabricatorSubscriptionsCurtainExtension.php
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<?php
final class PhabricatorSubscriptionsCurtainExtension
extends PHUICurtainExtension {
const EXTENSIONKEY = 'subscriptions.subscribers';
public function shouldEnableForObject($object) {
return ($object instanceof PhabricatorSubscribableInterface);
}
public function getExtensionApplication() {
return new PhabricatorSubscriptionsApplication();
}
public function buildCurtainPanel($object) {
$viewer = $this->getViewer();
$viewer_phid = $viewer->getPHID();
$object_phid = $object->getPHID();
$max_handles = 100;
$max_visible = 8;
// TODO: We should limit the number of subscriber PHIDs we'll load, so
// we degrade gracefully when objects have thousands of subscribers.
$subscriber_phids = PhabricatorSubscribersQuery::loadSubscribersForPHID(
$object_phid);
$subscriber_count = count($subscriber_phids);
$subscriber_phids = $this->sortSubscriberPHIDs(
$subscriber_phids,
null);
// If we have fewer subscribers than the maximum number of handles we're
// willing to load, load all the handles and then sort the list based on
// complete handle data.
// If we have too many PHIDs, we'll skip this step and accept a less
// useful ordering.
$handles = null;
if ($subscriber_count <= $max_handles) {
$handles = $viewer->loadHandles($subscriber_phids);
$subscriber_phids = $this->sortSubscriberPHIDs(
$subscriber_phids,
$handles);
}
// If we have more PHIDs to show than visible slots, slice the list.
if ($subscriber_count > $max_visible) {
$visible_phids = array_slice($subscriber_phids, 0, $max_visible - 1);
$show_all = true;
} else {
$visible_phids = $subscriber_phids;
$show_all = false;
}
// If we didn't load handles earlier because we had too many PHIDs,
// load them now.
if ($handles === null) {
$handles = $viewer->loadHandles($visible_phids);
}
PhabricatorPolicyFilterSet::loadHandleViewCapabilities(
$viewer,
$handles,
array($object));
$ref_list = id(new PHUICurtainObjectRefListView())
->setViewer($viewer)
->setEmptyMessage(pht('None'));
foreach ($visible_phids as $phid) {
$handle = $handles[$phid];
$ref = $ref_list->newObjectRefView()
->setHandle($handle);
if ($phid === $viewer_phid) {
$ref->setHighlighted(true);
}
if ($handle->hasCapabilities()) {
if (!$handle->hasViewCapability($object)) {
$ref->setExiled(true);
}
}
}
if ($show_all) {
$view_all_uri = urisprintf(
'/subscriptions/list/%s/',
$object_phid);
$ref_list->newTailLink()
->setURI($view_all_uri)
->setText(pht('View All %d Subscriber(s)', $subscriber_count))
->setWorkflow(true);
}
return $this->newPanel()
->setHeaderText(pht('Subscribers'))
->setOrder(20000)
->appendChild($ref_list);
}
private function sortSubscriberPHIDs(array $subscriber_phids, $handles) {
// Sort subscriber PHIDs with or without handle data. If we have handles,
// we can sort results more comprehensively.
$viewer = $this->getViewer();
$user_type = PhabricatorPeopleUserPHIDType::TYPECONST;
$viewer_phid = $viewer->getPHID();
$type_order_map = array(
PhabricatorPeopleUserPHIDType::TYPECONST => 0,
PhabricatorProjectProjectPHIDType::TYPECONST => 1,
PhabricatorOwnersPackagePHIDType::TYPECONST => 2,
);
$default_type_order = count($type_order_map);
$subscriber_map = array();
foreach ($subscriber_phids as $subscriber_phid) {
$is_viewer = ($viewer_phid === $subscriber_phid);
$subscriber_type = phid_get_type($subscriber_phid);
$type_order = idx($type_order_map, $subscriber_type, $default_type_order);
$sort_name = '';
$is_complete = false;
if ($handles) {
if (isset($handles[$subscriber_phid])) {
$handle = $handles[$subscriber_phid];
if ($handle->isComplete()) {
$is_complete = true;
$sort_name = $handle->getLinkName();
$sort_name = phutil_utf8_strtolower($sort_name);
}
}
}
$subscriber_map[$subscriber_phid] = id(new PhutilSortVector())
->addInt($is_viewer ? 0 : 1)
->addInt($is_complete ? 0 : 1)
->addInt($type_order)
->addString($sort_name);
}
$subscriber_map = msortv($subscriber_map, 'getSelf');
return array_keys($subscriber_map);
}
}

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