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HeraldWebhookStatusTransaction.php
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			<?php

			final class HeraldWebhookStatusTransaction
			extends HeraldWebhookTransactionType {

			const TRANSACTIONTYPE = 'status';

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

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

			public function getTitle() {
			$old_value = $this->getOldValue();
			$new_value = $this->getNewValue();

			$old_status = HeraldWebhook::getDisplayNameForStatus($old_value);
			$new_status = HeraldWebhook::getDisplayNameForStatus($new_value);

			return pht(
			'%s changed hook status from %s to %s.',
			$this->renderAuthor(),
			$this->renderValue($old_status),
			$this->renderValue($new_status));
			}

			public function getTitleForFeed() {
			$old_value = $this->getOldValue();
			$new_value = $this->getNewValue();

			$old_status = HeraldWebhook::getDisplayNameForStatus($old_value);
			$new_status = HeraldWebhook::getDisplayNameForStatus($new_value);

			return pht(
			'%s changed %s from %s to %s.',
			$this->renderAuthor(),
			$this->renderObject(),
			$this->renderValue($old_status),
			$this->renderValue($new_status));
			}

			public function validateTransactions($object, array $xactions) {
			$errors = array();
			$viewer = $this->getActor();

			$options = HeraldWebhook::getStatusDisplayNameMap();

			foreach ($xactions as $xaction) {
			$new_value = $xaction->getNewValue();

			if (!isset($options[$new_value])) {
			$errors[] = $this->newInvalidError(
			pht(
			'Webhook status "%s" is not valid. Valid statuses are: %s.',
			$new_value,
			implode(', ', array_keys($options))),
			$xaction);
			}
			}

			return $errors;
			}

			}