PhabricatorProjectTriggerRulesetTransaction.php
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	<?php

	final class PhabricatorProjectTriggerRulesetTransaction
	extends PhabricatorProjectTriggerTransactionType {

	const TRANSACTIONTYPE = 'ruleset';

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

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

	public function getTitle() {
	return pht(
	'%s updated the ruleset for this trigger.',
	$this->renderAuthor());
	}

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

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

	try {
	PhabricatorProjectTrigger::newTriggerRulesFromRuleSpecifications(
	$ruleset,
	$allow_invalid = false);
	} catch (PhabricatorProjectTriggerCorruptionException $ex) {
	$errors[] = $this->newInvalidError(
	pht(
	'Ruleset specification is not valid. %s',
	$ex->getMessage()),
	$xaction);
	continue;
	}
	}

	return $errors;
	}

	public function hasChangeDetailView() {
	return true;
	}

	public function newChangeDetailView() {
	$viewer = $this->getViewer();

	$old = $this->getOldValue();
	$new = $this->getNewValue();

	$json = new PhutilJSON();
	$old_json = $json->encodeAsList($old);
	$new_json = $json->encodeAsList($new);

	return id(new PhabricatorApplicationTransactionTextDiffDetailView())
	->setViewer($viewer)
	->setOldText($old_json)
	->setNewText($new_json);
	}

	}