PhabricatorProjectColumnTriggerTransaction.php
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PhabricatorProjectColumnTriggerTransaction.php
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	<?php

	final class PhabricatorProjectColumnTriggerTransaction
	extends PhabricatorProjectColumnTransactionType {

	const TRANSACTIONTYPE = 'trigger';

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

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

	public function applyExternalEffects($object, $value) {
	// After we change the trigger attached to a column, update the search
	// indexes for the old and new triggers so we update the usage index.
	$old = $this->getOldValue();
	$new = $this->getNewValue();

	$column_phids = array();
	if ($old) {
	$column_phids[] = $old;
	}
	if ($new) {
	$column_phids[] = $new;
	}

	foreach ($column_phids as $phid) {
	PhabricatorSearchWorker::queueDocumentForIndexing($phid);
	}
	}

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

	if (!$old) {
	return pht(
	'%s set the column trigger to %s.',
	$this->renderAuthor(),
	$this->renderNewHandle());
	} else if (!$new) {
	return pht(
	'%s removed the trigger for this column (was %s).',
	$this->renderAuthor(),
	$this->renderOldHandle());
	} else {
	return pht(
	'%s changed the trigger for this column from %s to %s.',
	$this->renderAuthor(),
	$this->renderOldHandle(),
	$this->renderNewHandle());
	}
	}

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

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

	// You can always remove a trigger.
	if (!$trigger_phid) {
	continue;
	}

	// You can't put a trigger on a column that can't have triggers, like
	// a backlog column or a proxy column.
	if (!$object->canHaveTrigger()) {
	$errors[] = $this->newInvalidError(
	pht('This column can not have a trigger.'),
	$xaction);
	continue;
	}

	$trigger = id(new PhabricatorProjectTriggerQuery())
	->setViewer($actor)
	->withPHIDs(array($trigger_phid))
	->execute();
	if (!$trigger) {
	$errors[] = $this->newInvalidError(
	pht(
	'Trigger "%s" is not a valid trigger, or you do not have '.
	'permission to view it.',
	$trigger_phid),
	$xaction);
	continue;
	}
	}

	return $errors;
	}

	}

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