AlmanacInterfaceDestroyTransaction.php
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	<?php

	final class AlmanacInterfaceDestroyTransaction
	extends AlmanacInterfaceTransactionType {

	const TRANSACTIONTYPE = 'almanac:interface:destroy';

	public function generateOldValue($object) {
	return false;
	}

	public function applyExternalEffects($object, $value) {
	id(new PhabricatorDestructionEngine())
	->destroyObject($object);
	}

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

	if ($xactions) {
	if ($object->loadIsInUse()) {
	$errors[] = $this->newInvalidError(
	pht(
	'You can not delete this interface because it is currently in '.
	'use. One or more services are bound to it.'));
	}
	}

	return $errors;
	}

	}