AlmanacInterfacePortTransaction.php
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	<?php

	final class AlmanacInterfacePortTransaction
	extends AlmanacInterfaceTransactionType {

	const TRANSACTIONTYPE = 'almanac:interface:port';

	public function generateOldValue($object) {
	$port = $object->getPort();

	if ($port !== null) {
	$port = (int)$port;
	}

	return $port;
	}

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

	public function getTitle() {
	return pht(
	'%s changed the port for this interface from %s to %s.',
	$this->renderAuthor(),
	$this->renderOldValue(),
	$this->renderNewValue());
	}

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

	if ($this->isEmptyTextTransaction($object->getPort(), $xactions)) {
	$errors[] = $this->newRequiredError(
	pht('Interfaces must have a port number.'));
	}

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

	$port = (int)$port;
	if ($port < 1 \|\| $port > 65535) {
	$errors[] = $this->newInvalidError(
	pht('Port numbers must be between 1 and 65535, inclusive.'),
	$xaction);
	continue;
	}
	}

	return $errors;
	}

	}