PhabricatorProjectColumnStatusTransaction.php
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	<?php

	final class PhabricatorProjectColumnStatusTransaction
	extends PhabricatorProjectColumnTransactionType {

	const TRANSACTIONTYPE = 'project:col:status';

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

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

	public function applyExternalEffects($object, $value) {
	// Update the trigger usage index, which cares about whether columns are
	// active or not.
	$trigger_phid = $object->getTriggerPHID();
	if ($trigger_phid) {
	PhabricatorSearchWorker::queueDocumentForIndexing($trigger_phid);
	}
	}

	public function getTitle() {
	$new = $this->getNewValue();

	switch ($new) {
	case PhabricatorProjectColumn::STATUS_ACTIVE:
	return pht(
	'%s unhid this column.',
	$this->renderAuthor());
	case PhabricatorProjectColumn::STATUS_HIDDEN:
	return pht(
	'%s hid this column.',
	$this->renderAuthor());
	}
	}

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

	$map = array(
	PhabricatorProjectColumn::STATUS_ACTIVE,
	PhabricatorProjectColumn::STATUS_HIDDEN,
	);
	$map = array_fuse($map);

	foreach ($xactions as $xaction) {
	$value = $xaction->getNewValue();
	if (!isset($map[$value])) {
	$errors[] = $this->newInvalidError(
	pht(
	'Column status "%s" is unrecognized, valid statuses are: %s.',
	$value,
	implode(', ', array_keys($map))),
	$xaction);
	}
	}

	return $errors;
	}

	}