PhabricatorProjectColumnNameTransaction.php
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	<?php

	final class PhabricatorProjectColumnNameTransaction
	extends PhabricatorProjectColumnTransactionType {

	const TRANSACTIONTYPE = 'project:col:name';

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

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

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

	if (!strlen($old)) {
	return pht(
	'%s named this column %s.',
	$this->renderAuthor(),
	$this->renderNewValue());
	} else if (strlen($new)) {
	return pht(
	'%s renamed this column from %s to %s.',
	$this->renderAuthor(),
	$this->renderOldValue(),
	$this->renderNewValue());
	} else {
	return pht(
	'%s removed the custom name of this column.',
	$this->renderAuthor());
	}
	}

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

	if ($this->isEmptyTextTransaction($object->getName(), $xactions)) {
	// The default "Backlog" column is allowed to be unnamed, which
	// means we use the default name.
	if (!$object->isDefaultColumn()) {
	$errors[] = $this->newRequiredError(
	pht('Columns must have a name.'));
	}
	}

	$max_length = $object->getColumnMaximumByteLength('name');
	foreach ($xactions as $xaction) {
	$new_value = $xaction->getNewValue();
	$new_length = strlen($new_value);
	if ($new_length > $max_length) {
	$errors[] = $this->newInvalidError(
	pht(
	'Column names must not be longer than %s characters.',
	new PhutilNumber($max_length)),
	$xaction);
	}
	}

	return $errors;
	}

	}