testing

AlmanacServiceTypeTransaction.php
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			<?php

			final class AlmanacServiceTypeTransaction
			extends AlmanacServiceTransactionType {

			const TRANSACTIONTYPE = 'almanac:service:type';

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

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

			public function getTitle() {
			// This transaction can only be applied during object creation via
			// Conduit and never generates a timeline event.
			return null;
			}

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

			if ($this->isEmptyTextTransaction($object->getServiceType(), $xactions)) {
			$errors[] = $this->newRequiredError(
			pht('You must select a service type when creating a service.'));
			}

			$map = AlmanacServiceType::getAllServiceTypes();

			foreach ($xactions as $xaction) {
			if (!$this->isNewObject()) {
			$errors[] = $this->newInvalidError(
			pht(
			'The type of a service can not be changed once it has '.
			'been created.'),
			$xaction);
			continue;
			}

			$new = $xaction->getNewValue();
			if (!isset($map[$new])) {
			$errors[] = $this->newInvalidError(
			pht(
			'Service type "%s" is not valid. Valid types are: %s.',
			$new,
			implode(', ', array_keys($map))));
			continue;
			}
			}

			return $errors;
			}
			}