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PhabricatorOwnersPackageNameTransaction.php
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			<?php

			final class PhabricatorOwnersPackageNameTransaction
			extends PhabricatorOwnersPackageTransactionType {

			const TRANSACTIONTYPE = 'owners.name';

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

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

			$missing = $this->isEmptyTextTransaction(
			$object->getName(),
			$xactions);

			if ($missing) {
			$errors[] = $this->newRequiredError(
			pht('Package name is required.'),
			nonempty(last($xactions), null));
			}

			foreach ($xactions as $xaction) {
			$new = $xaction->getNewValue();
			if (preg_match('([,!])', $new)) {
			$errors[] = $this->newInvalidError(
			pht(
			'Package names may not contain commas (",") or exclamation '.
			'marks ("!"). These characters are ambiguous when package '.
			'names are parsed from the command line.'),
			$xaction);
			}
			}

			return $errors;
			}

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

			public function getTitle() {
			return pht(
			'%s renamed this package from %s to %s.',
			$this->renderAuthor(),
			$this->renderOldValue(),
			$this->renderNewValue());
			}

			}