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PhabricatorEditEngineNameTransaction.php
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			<?php

			final class PhabricatorEditEngineNameTransaction
			extends PhabricatorEditEngineTransactionType {

			const TRANSACTIONTYPE = 'editengine.config.name';

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

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

			public function getTitle() {
			if (strlen($this->getOldValue())) {
			return pht(
			'%s renamed this form from %s to %s.',
			$this->renderAuthor(),
			$this->renderOldValue(),
			$this->renderNewValue());
			} else {
			return pht(
			'%s named this form %s.',
			$this->renderAuthor(),
			$this->renderNewValue());
			}
			}

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

			foreach ($xactions as $xaction) {
			$new = $xaction->getNewValue();
			if (!strlen($new)) {
			$errors[] = $this->newRequiredError(
			pht('Form name is required.'),
			$xaction);
			continue;
			}
			}

			if (!$errors) {
			if ($this->isEmptyTextTransaction($object->getName(), $xactions)) {
			$errors[] = $this->newRequiredError(
			pht('Forms must have a name.'));
			}
			}

			return $errors;
			}

			}