PassphraseCredentialUsernameTransaction.php
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	<?php

	final class PassphraseCredentialUsernameTransaction
	extends PassphraseCredentialTransactionType {

	const TRANSACTIONTYPE = 'passphrase:username';

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

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

	public function getTitle() {
	return pht(
	'%s set the username for this credential to %s.',
	$this->renderAuthor(),
	$this->renderNewValue());
	}

	public function getTitleForFeed() {
	return pht(
	'%s set the username for credential %s to %s.',
	$this->renderAuthor(),
	$this->renderObject(),
	$this->renderNewValue());
	}

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

	$credential_type = $object->getImplementation();
	if ($credential_type->shouldRequireUsername()) {
	if ($this->isEmptyTextTransaction($object->getUsername(), $xactions)) {
	$errors[] = $this->newRequiredError(
	pht('This credential must have a username.'));
	}
	}

	$max_length = $object->getColumnMaximumByteLength('username');
	foreach ($xactions as $xaction) {
	$new_value = $xaction->getNewValue();
	$new_length = strlen($new_value);
	if ($new_length > $max_length) {
	$errors[] = $this->newInvalidError(
	pht('The username can be no longer than %s characters.',
	new PhutilNumber($max_length)));
	}
	}

	return $errors;
	}

	}