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PhabricatorCalendarImportEngine.php
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Tue, Oct 15, 02:49

PhabricatorCalendarImportEngine.php
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<?php
abstract class PhabricatorCalendarImportEngine
extends Phobject {
final public function getImportEngineType() {
return $this->getPhobjectClassConstant('ENGINETYPE', 64);
}
abstract public function getImportEngineName();
abstract public function getImportEngineTypeName();
abstract public function getImportEngineHint();
public function appendImportProperties(
PhabricatorUser $viewer,
PhabricatorCalendarImport $import,
PHUIPropertyListView $properties) {
return;
}
abstract public function newEditEngineFields(
PhabricatorEditEngine $engine,
PhabricatorCalendarImport $import);
abstract public function getDisplayName(PhabricatorCalendarImport $import);
abstract public function importEventsFromSource(
PhabricatorUser $viewer,
PhabricatorCalendarImport $import);
abstract public function canDisable(
PhabricatorUser $viewer,
PhabricatorCalendarImport $import);
public function explainCanDisable(
PhabricatorUser $viewer,
PhabricatorCalendarImport $import) {
throw new PhutilMethodNotImplementedException();
}
final public static function getAllImportEngines() {
return id(new PhutilClassMapQuery())
->setAncestorClass(__CLASS__)
->setUniqueMethod('getImportEngineType')
->setSortMethod('getImportEngineName')
->execute();
}
final protected function importEventDocument(
PhabricatorUser $viewer,
PhabricatorCalendarImport $import,
PhutilCalendarRootNode $root = null) {
$event_type = PhutilCalendarEventNode::NODETYPE;
$nodes = array();
if ($root) {
foreach ($root->getChildren() as $document) {
foreach ($document->getChildren() as $node) {
$node_type = $node->getNodeType();
if ($node_type != $event_type) {
$import->newLogMessage(
PhabricatorCalendarImportIgnoredNodeLogType::LOGTYPE,
array(
'node.type' => $node_type,
));
continue;
}
$nodes[] = $node;
}
}
}
// Reject events which have dates outside of the range of a signed
// 32-bit integer. We'll need to accommodate a wider range of events
// eventually, but have about 20 years until it's an issue and we'll
// all be dead by then.
foreach ($nodes as $key => $node) {
$dates = array();
$dates[] = $node->getStartDateTime();
$dates[] = $node->getEndDateTime();
$dates[] = $node->getCreatedDateTime();
$dates[] = $node->getModifiedDateTime();
$rrule = $node->getRecurrenceRule();
if ($rrule) {
$dates[] = $rrule->getUntil();
}
$bad_date = false;
foreach ($dates as $date) {
if ($date === null) {
continue;
}
$year = $date->getYear();
if ($year < 1970 || $year > 2037) {
$bad_date = true;
break;
}
}
if ($bad_date) {
$import->newLogMessage(
PhabricatorCalendarImportEpochLogType::LOGTYPE,
array());
unset($nodes[$key]);
}
}
// Reject events which occur too frequently. Users do not normally define
// these events and the UI and application make many assumptions which are
// incompatible with events recurring once per second.
foreach ($nodes as $key => $node) {
$rrule = $node->getRecurrenceRule();
if (!$rrule) {
// This is not a recurring event, so we don't need to check the
// frequency.
continue;
}
$scale = $rrule->getFrequencyScale();
if ($scale >= PhutilCalendarRecurrenceRule::SCALE_DAILY) {
// This is a daily, weekly, monthly, or yearly event. These are
// supported.
} else {
// This is an hourly, minutely, or secondly event.
$import->newLogMessage(
PhabricatorCalendarImportFrequencyLogType::LOGTYPE,
array(
'frequency' => $rrule->getFrequency(),
));
unset($nodes[$key]);
}
}
$node_map = array();
foreach ($nodes as $node) {
$full_uid = $this->getFullNodeUID($node);
if (isset($node_map[$full_uid])) {
$import->newLogMessage(
PhabricatorCalendarImportDuplicateLogType::LOGTYPE,
array(
'uid.full' => $full_uid,
));
continue;
}
$node_map[$full_uid] = $node;
}
// If we already know about some of these events and they were created
// here, we're not going to import it again. This can happen if a user
// exports an event and then tries to import it again. This is probably
// not what they meant to do and this pathway generally leads to madness.
$likely_phids = array();
foreach ($node_map as $full_uid => $node) {
$uid = $node->getUID();
$matches = null;
if (preg_match('/^(PHID-.*)@(.*)\z/', $uid, $matches)) {
$likely_phids[$full_uid] = $matches[1];
}
}
if ($likely_phids) {
// NOTE: We're using the omnipotent viewer here because we don't want
// to collide with events that already exist, even if you can't see
// them.
$events = id(new PhabricatorCalendarEventQuery())
->setViewer(PhabricatorUser::getOmnipotentUser())
->withPHIDs($likely_phids)
->execute();
$events = mpull($events, null, 'getPHID');
foreach ($node_map as $full_uid => $node) {
$phid = idx($likely_phids, $full_uid);
if (!$phid) {
continue;
}
$event = idx($events, $phid);
if (!$event) {
continue;
}
$import->newLogMessage(
PhabricatorCalendarImportOriginalLogType::LOGTYPE,
array(
'phid' => $event->getPHID(),
));
unset($node_map[$full_uid]);
}
}
if ($node_map) {
$events = id(new PhabricatorCalendarEventQuery())
->setViewer($viewer)
->withImportAuthorPHIDs(array($viewer->getPHID()))
->withImportUIDs(array_keys($node_map))
->execute();
$events = mpull($events, null, 'getImportUID');
} else {
$events = null;
}
$xactions = array();
$update_map = array();
foreach ($node_map as $full_uid => $node) {
$event = idx($events, $full_uid);
if (!$event) {
$event = PhabricatorCalendarEvent::initializeNewCalendarEvent($viewer);
}
$event
->setImportAuthorPHID($viewer->getPHID())
->setImportSourcePHID($import->getPHID())
->setImportUID($full_uid)
->attachImportSource($import);
$this->updateEventFromNode($viewer, $event, $node);
$xactions[$full_uid] = $this->newUpdateTransactions($event, $node);
$update_map[$full_uid] = $event;
}
// Reorder events so we create parents first. This allows us to populate
// "instanceOfEventPHID" correctly.
$insert_order = array();
foreach ($update_map as $full_uid => $event) {
$parent_uid = $this->getParentNodeUID($node_map[$full_uid]);
if ($parent_uid === null) {
$insert_order[$full_uid] = $full_uid;
continue;
}
if (empty($update_map[$parent_uid])) {
// The parent was not present in this import, which means it either
// does not exist or we're going to delete it anyway. We just drop
// this node.
$import->newLogMessage(
PhabricatorCalendarImportOrphanLogType::LOGTYPE,
array(
'uid.full' => $full_uid,
'uid.parent' => $parent_uid,
));
continue;
}
// Otherwise, we're going to insert the parent first, then insert
// the child.
$insert_order[$parent_uid] = $parent_uid;
$insert_order[$full_uid] = $full_uid;
}
// TODO: Define per-engine content sources so this can say "via Upload" or
// whatever.
$content_source = PhabricatorContentSource::newForSource(
PhabricatorWebContentSource::SOURCECONST);
// NOTE: We're using the omnipotent user here because imported events are
// otherwise immutable.
$edit_actor = PhabricatorUser::getOmnipotentUser();
$update_map = array_select_keys($update_map, $insert_order);
foreach ($update_map as $full_uid => $event) {
$parent_uid = $this->getParentNodeUID($node_map[$full_uid]);
if ($parent_uid) {
$parent_phid = $update_map[$full_uid]->getPHID();
} else {
$parent_phid = null;
}
$event->setInstanceOfEventPHID($parent_phid);
$event_xactions = $xactions[$full_uid];
$editor = id(new PhabricatorCalendarEventEditor())
->setActor($edit_actor)
->setActingAsPHID($import->getPHID())
->setContentSource($content_source)
->setContinueOnNoEffect(true)
->setContinueOnMissingFields(true);
$is_new = !$event->getID();
$editor->applyTransactions($event, $event_xactions);
$import->newLogMessage(
PhabricatorCalendarImportUpdateLogType::LOGTYPE,
array(
'new' => $is_new,
'phid' => $event->getPHID(),
));
}
if (!$update_map) {
$import->newLogMessage(
PhabricatorCalendarImportEmptyLogType::LOGTYPE,
array());
}
// TODO: When the source is a subscription-based ICS file or some other
// similar source, we should load all events from the source here and
// destroy the ones we didn't update. These are events that have been
// deleted.
}
private function getFullNodeUID(PhutilCalendarEventNode $node) {
$uid = $node->getUID();
$instance_epoch = $this->getNodeInstanceEpoch($node);
$full_uid = $uid.'/'.$instance_epoch;
return $full_uid;
}
private function getParentNodeUID(PhutilCalendarEventNode $node) {
$recurrence_id = $node->getRecurrenceID();
if (!strlen($recurrence_id)) {
return null;
}
return $node->getUID().'/';
}
private function getNodeInstanceEpoch(PhutilCalendarEventNode $node) {
$instance_iso = $node->getRecurrenceID();
if (strlen($instance_iso)) {
$instance_datetime = PhutilCalendarAbsoluteDateTime::newFromISO8601(
$instance_iso);
$instance_epoch = $instance_datetime->getEpoch();
} else {
$instance_epoch = null;
}
return $instance_epoch;
}
private function newUpdateTransactions(
PhabricatorCalendarEvent $event,
PhutilCalendarEventNode $node) {
$xactions = array();
$uid = $node->getUID();
$name = $node->getName();
if (!strlen($name)) {
if (strlen($uid)) {
$name = pht('Unnamed Event "%s"', $uid);
} else {
$name = pht('Unnamed Imported Event');
}
}
$xactions[] = id(new PhabricatorCalendarEventTransaction())
->setTransactionType(
PhabricatorCalendarEventNameTransaction::TRANSACTIONTYPE)
->setNewValue($name);
$description = $node->getDescription();
$xactions[] = id(new PhabricatorCalendarEventTransaction())
->setTransactionType(
PhabricatorCalendarEventDescriptionTransaction::TRANSACTIONTYPE)
->setNewValue((string)$description);
$is_recurring = (bool)$node->getRecurrenceRule();
$xactions[] = id(new PhabricatorCalendarEventTransaction())
->setTransactionType(
PhabricatorCalendarEventRecurringTransaction::TRANSACTIONTYPE)
->setNewValue($is_recurring);
return $xactions;
}
private function updateEventFromNode(
PhabricatorUser $actor,
PhabricatorCalendarEvent $event,
PhutilCalendarEventNode $node) {
$instance_epoch = $this->getNodeInstanceEpoch($node);
$event->setUTCInstanceEpoch($instance_epoch);
$timezone = $actor->getTimezoneIdentifier();
// TODO: These should be transactional, but the transaction only accepts
// epoch timestamps right now.
$start_datetime = $node->getStartDateTime()
->setViewerTimezone($timezone);
$end_datetime = $node->getEndDateTime()
->setViewerTimezone($timezone);
$event
->setStartDateTime($start_datetime)
->setEndDateTime($end_datetime);
// TODO: This should be transactional, but the transaction only accepts
// simple frequency rules right now.
$rrule = $node->getRecurrenceRule();
if ($rrule) {
$event->setRecurrenceRule($rrule);
$until_datetime = $rrule->getUntil();
if ($until_datetime) {
$until_datetime->setViewerTimezone($timezone);
$event->setUntilDateTime($until_datetime);
}
$count = $rrule->getCount();
$event->setParameter('recurrenceCount', $count);
}
return $event;
}
public function canDeleteAnyEvents(
PhabricatorUser $viewer,
PhabricatorCalendarImport $import) {
$any_event = id(new PhabricatorCalendarEventQuery())
->setViewer($viewer)
->withImportSourcePHIDs(array($import->getPHID()))
->setLimit(1)
->execute();
return (bool)$any_event;
}
}

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