PhabricatorCalendarExportModeTransaction.php
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	<?php

	final class PhabricatorCalendarExportModeTransaction
	extends PhabricatorCalendarExportTransactionType {

	const TRANSACTIONTYPE = 'calendar.export.mode';

	public function generateOldValue($object) {
	return $object->getPolicyMode();
	}

	public function applyInternalEffects($object, $value) {
	$object->setPolicyMode($value);
	}

	public function getTitle() {
	$old_value = $this->getOldValue();
	$new_value = $this->getNewValue();

	$old_name = PhabricatorCalendarExport::getPolicyModeName($old_value);
	$new_name = PhabricatorCalendarExport::getPolicyModeName($new_value);

	return pht(
	'%s changed the policy mode for this export from %s to %s.',
	$this->renderAuthor(),
	$this->renderValue($old_name),
	$this->renderValue($new_name));
	}

	public function validateTransactions($object, array $xactions) {
	$errors = array();

	$valid = PhabricatorCalendarExport::getPolicyModes();
	$valid = array_fuse($valid);

	foreach ($xactions as $xaction) {
	$value = $xaction->getNewValue();

	if (isset($valid[$value])) {
	continue;
	}

	$errors[] = $this->newInvalidError(
	pht(
	'Mode "%s" is not a valid policy mode. Valid modes are: %s.',
	$value,
	implode(', ', $valid)),
	$xaction);
	}

	return $errors;
	}

	}