PhabricatorPackagesVersionPackageTransaction.php
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PhabricatorPackagesVersionPackageTransaction.php
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	<?php

	final class PhabricatorPackagesVersionPackageTransaction
	extends PhabricatorPackagesVersionTransactionType {

	const TRANSACTIONTYPE = 'packages.version.package';

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

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

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

	if ($this->isEmptyTextTransaction($object->getPackagePHID(), $xactions)) {
	$errors[] = $this->newRequiredError(
	pht(
	'You must select a package when creating a version'));
	return $errors;
	}

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

	$viewer = $this->getActor();
	foreach ($xactions as $xaction) {
	$package_phid = $xaction->getNewValue();

	$package = id(new PhabricatorPackagesPackageQuery())
	->setViewer($viewer)
	->withPHIDs(array($package_phid))
	->setRaisePolicyExceptions(false)
	->requireCapabilities(
	array(
	PhabricatorPolicyCapability::CAN_VIEW,
	PhabricatorPolicyCapability::CAN_EDIT,
	))
	->executeOne();

	if (!$package) {
	$errors[] = $this->newInvalidError(
	pht(
	'Package "%s" is invalid: the package must exist and you '.
	'must have permission to edit it in order to create a new '.
	'package.',
	$package_phid),
	$xaction);
	continue;
	}

	$object->attachPackage($package);
	}

	return $errors;
	}

	}