PhabricatorPackagesPackageKeyTransaction.php
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	<?php

	final class PhabricatorPackagesPackageKeyTransaction
	extends PhabricatorPackagesPackageTransactionType {

	const TRANSACTIONTYPE = 'packages.package.key';

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

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

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

	if ($this->isEmptyTextTransaction($object->getName(), $xactions)) {
	$errors[] = $this->newRequiredError(
	pht(
	'Each package provided by a publisher must have a '.
	'unique package key.'));
	return $errors;
	}

	if (!$this->isNewObject()) {
	foreach ($xactions as $xaction) {
	$errors[] = $this->newInvalidError(
	pht('Once a package is created, its key can not be changed.'),
	$xaction);
	}
	}

	foreach ($xactions as $xaction) {
	$value = $xaction->getNewValue();
	try {
	PhabricatorPackagesPackage::assertValidPackageKey($value);
	} catch (Exception $ex) {
	$errors[] = $this->newInvalidError($ex->getMessage(), $xaction);
	}
	}

	return $errors;
	}

	}