eZ\Bundle\EzPublishMigrationBundle\Command\LegacyStorage\RegenerateUrlAliasesCommand::doBackupCustomLocationAliases PHP Method

    protected function doBackupCustomLocationAliases()
    {
        $totalCount = $this->getTotalLocationCount();
        $passCount = ceil($totalCount / $this->bulkCount);
        $customAliasCount = 0;
        $customAliasPathCount = 0;
        if ($totalCount === 0) {
            $this->output->writeln('Could not find any Locations, nothing to backup.');
            $this->output->writeln('');
            return;
        }
        $queryBuilder = $this->connection->createQueryBuilder();
        $queryBuilder->select('node_id', 'parent_node_id', 'contentobject_id')->from('ezcontentobject_tree')->where($queryBuilder->expr()->neq('node_id', 1))->orderBy('depth', 'ASC')->orderBy('node_id', 'ASC');
        $this->output->writeln("Backing up custom URL alias(es) for {$totalCount} Location(s).");
        $progressBar = $this->getProgressBar($totalCount);
        $progressBar->start();
        for ($pass = 0; $pass <= $passCount; ++$pass) {
            $rows = $this->loadLocationData($queryBuilder, $pass);
            foreach ($rows as $row) {
                $customAliases = $this->urlAliasHandler->listURLAliasesForLocation($row['node_id'], true);
                $customAliasCount += count($customAliases);
                $customAliasPathCount += $this->storeCustomAliases($customAliases);
            }
            $progressBar->advance(count($rows));
        }
        $progressBar->finish();
        $this->output->writeln('');
        $this->output->writeln("Done. Backed up {$customAliasCount} custom URL alias(es) " . "with {$customAliasPathCount} path(s).");
        $this->output->writeln('');
    }