PhabricatorCalendarImportDeleteTransaction.php
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	<?php

	final class PhabricatorCalendarImportDeleteTransaction
	extends PhabricatorCalendarImportTransactionType {

	const TRANSACTIONTYPE = 'calendar.import.delete';

	public function generateOldValue($object) {
	return false;
	}

	public function applyExternalEffects($object, $value) {
	$events = id(new PhabricatorCalendarEventQuery())
	->setViewer($this->getActor())
	->withImportSourcePHIDs(array($object->getPHID()))
	->execute();

	$engine = new PhabricatorDestructionEngine();
	foreach ($events as $event) {
	$engine->destroyObject($event);
	}
	}

	public function getTitle() {
	return pht(
	'%s deleted imported events from this source.',
	$this->renderAuthor());
	}

	}