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20161004.cal.01.noepoch.php
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Sat, Nov 30, 00:23

20161004.cal.01.noepoch.php
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<?php
$table = new PhabricatorCalendarEvent();
$conn = $table->establishConnection('w');
$table_name = 'calendar_event';
// Long ago, "All Day" events were stored with a start and end date set to
// the earliest possible start and end seconds for the corresponding days. We
// then moved to store all day events with their "date" epochs as UTC, separate
// from individual event times. Both systems were later replaced with use of
// CalendarDateTime.
$zone_min = new DateTimeZone('Pacific/Midway');
$zone_max = new DateTimeZone('Pacific/Kiritimati');
$zone_utc = new DateTimeZone('UTC');
foreach (new LiskRawMigrationIterator($conn, $table_name) as $row) {
$parameters = phutil_json_decode($row['parameters']);
if (isset($parameters['startDateTime'])) {
// This event has already been migrated.
continue;
}
$is_all_day = $row['isAllDay'];
if (empty($row['allDayDateFrom'])) {
// No "allDayDateFrom" means this is an old event which was never migrated
// by the earlier "20160715.event.03.allday.php" migration. The dateFrom
// and dateTo will be minimum and maximum earthly seconds for the event. We
// convert them to UTC if they were in extreme timezones.
$epoch_min = $row['dateFrom'];
$epoch_max = $row['dateTo'];
if ($is_all_day) {
$date_min = new DateTime('@'.$epoch_min);
$date_max = new DateTime('@'.$epoch_max);
$date_min->setTimeZone($zone_min);
$date_min->modify('+2 days');
$date_max->setTimeZone($zone_max);
$date_max->modify('-2 days');
$string_min = $date_min->format('Y-m-d');
$string_max = $date_max->format('Y-m-d 23:59:00');
$utc_min = id(new DateTime($string_min, $zone_utc))->format('U');
$utc_max = id(new DateTime($string_max, $zone_utc))->format('U');
} else {
$utc_min = $epoch_min;
$utc_max = $epoch_max;
}
} else {
// This is an event which was migrated already. We can pick the correct
// epoch timestamps based on the "isAllDay" flag.
if ($is_all_day) {
$utc_min = $row['allDayDateFrom'];
$utc_max = $row['allDayDateTo'];
} else {
$utc_min = $row['dateFrom'];
$utc_max = $row['dateTo'];
}
}
$utc_until = $row['recurrenceEndDate'];
$start_datetime = PhutilCalendarAbsoluteDateTime::newFromEpoch($utc_min);
if ($is_all_day) {
$start_datetime->setIsAllDay(true);
}
$end_datetime = PhutilCalendarAbsoluteDateTime::newFromEpoch($utc_max);
if ($is_all_day) {
$end_datetime->setIsAllDay(true);
}
if ($utc_until) {
$until_datetime = PhutilCalendarAbsoluteDateTime::newFromEpoch($utc_until);
} else {
$until_datetime = null;
}
$parameters['startDateTime'] = $start_datetime->toDictionary();
$parameters['endDateTime'] = $end_datetime->toDictionary();
if ($until_datetime) {
$parameters['untilDateTime'] = $until_datetime->toDictionary();
}
queryfx(
$conn,
'UPDATE %T SET parameters = %s WHERE id = %d',
$table_name,
phutil_json_encode($parameters),
$row['id']);
}
// Generate UTC epochs for all events. We can't readily do this one at a
// time because instance UTC epochs rely on having the parent event.
$viewer = PhabricatorUser::getOmnipotentUser();
$all_events = id(new PhabricatorCalendarEventQuery())
->setViewer($viewer)
->execute();
foreach ($all_events as $event) {
if ($event->getUTCInitialEpoch()) {
// Already migrated.
continue;
}
try {
$event->updateUTCEpochs();
} catch (Exception $ex) {
continue;
}
queryfx(
$conn,
'UPDATE %T SET
utcInitialEpoch = %d,
utcUntilEpoch = %nd,
utcInstanceEpoch = %nd WHERE id = %d',
$table_name,
$event->getUTCInitialEpoch(),
$event->getUTCUntilEpoch(),
$event->getUTCInstanceEpoch(),
$event->getID());
}

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