PhabricatorCalendarImportFrequencyTransaction.php
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	<?php

	final class PhabricatorCalendarImportFrequencyTransaction
	extends PhabricatorCalendarImportTransactionType {

	const TRANSACTIONTYPE = 'calendar.import.frequency';

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

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

	public function getTitle() {
	return pht(
	'%s changed the automatic update frequency for this import.',
	$this->renderAuthor());
	}

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

	$frequency_map = PhabricatorCalendarImport::getTriggerFrequencyMap();
	$valid = array_keys($frequency_map);
	$valid = array_fuse($valid);

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

	if (!isset($valid[$value])) {
	$errors[] = $this->newInvalidError(
	pht(
	'Import frequency "%s" is not valid. Valid frequences are: %s.',
	$value,
	implode(', ', $valid)),
	$xaction);
	}
	}

	return $errors;
	}

	}