src/applications/calendar/xaction/PhabricatorCalendarEventDateTransaction.php

   1 <?php
   2
   3 abstract class PhabricatorCalendarEventDateTransaction
   4   extends PhabricatorCalendarEventTransactionType {
   5
   6   abstract protected function getInvalidDateMessage();
   7
   8   public function isInheritedEdit() {
   9     return false;
  10   }
  11
  12   public function generateNewValue($object, $value) {
  13     $editor = $this->getEditor();
  14
  15     if ($value->isDisabled()) {
  16       return null;
  17     }
  18
  19     return $value->newPhutilDateTime()
  20       ->setIsAllDay($editor->getNewIsAllDay())
  21       ->newAbsoluteDateTime()
  22       ->toDictionary();
  23   }
  24
  25   public function getTransactionHasEffect($object, $old, $new) {
  26     // If either value is `null` (for example, when setting a recurring event
  27     // end date for the first time) and the other value is not `null`, this
  28     // transaction has an effect.
  29     $has_null = (($old === null) || ($new === null));
  30     if ($has_null) {
  31       return ($old !== $new);
  32     }
  33
  34     $editor = $this->getEditor();
  35
  36     $actor = $this->getActor();
  37     $actor_timezone = $actor->getTimezoneIdentifier();
  38
  39     // When an edit only changes the timezone of an event without materially
  40     // changing the absolute time, discard it. This can happen if two users in
  41     // different timezones edit an event without rescheduling it.
  42
  43     // Eventually, after T11073, there may be a UI control to adjust timezones.
  44     // If a user explicitly changed the timezone, we should respect that.
  45     // However, there is no way for users to intentionally apply this kind of
  46     // edit today.
  47
  48     $old_datetime = PhutilCalendarAbsoluteDateTime::newFromDictionary($old)
  49       ->setIsAllDay($editor->getNewIsAllDay())
  50       ->setViewerTimezone($actor_timezone);
  51
  52     $new_datetime = PhutilCalendarAbsoluteDateTime::newFromDictionary($new)
  53       ->setIsAllDay($editor->getNewIsAllDay())
  54       ->setViewerTimezone($actor_timezone);
  55
  56     $old_epoch = $old_datetime->getEpoch();
  57     $new_epoch = $new_datetime->getEpoch();
  58
  59     return ($old_epoch !== $new_epoch);
  60   }
  61
  62   public function validateTransactions($object, array $xactions) {
  63     $errors = array();
  64
  65     foreach ($xactions as $xaction) {
  66       if ($xaction->getNewValue()->isValid()) {
  67         continue;
  68       }
  69
  70       $message = $this->getInvalidDateMessage();
  71       $errors[] = $this->newInvalidError($message, $xaction);
  72     }
  73
  74     return $errors;
  75   }
  76
  77 }