Imap::syncMailbox

public function syncMailbox()
{
	if (!$this->client->authenticate($error))
	{
		return false;
	}

	$syncReport = [
		'syncCount'=>0,
		'reSyncCount' => 0,
		'reSyncStatus' => false,
	];

	$this->cacheDirs();

	$currentDir = null;

	if (!empty($this->syncParams['currentDir']))
	{
		$currentDir = $this->syncParams['currentDir'];
	}

	$dirsSync = $this->getDirsHelper()->getSyncDirsOrderByTime($currentDir);

	if (empty($dirsSync))
	{
		return $syncReport;
	}

	$lastDir = $this->getDirsHelper()->getLastSyncDirByDefault($currentDir);

	foreach ($dirsSync as $item)
	{
		MailboxDirectoryHelper::setCurrentSyncDir($item->getPath());

		$syncReport['syncCount'] += $this->syncDir($item->getPath());

		if ($this->isTimeQuotaExceeded())
		{
			break;
		}

		MailboxDirectory::updateSyncTime($item->getId(), time());

		if ($lastDir != null && $item->getPath() == $lastDir->getPath())
		{
			MailboxDirectoryHelper::setCurrentSyncDir('');
			break;
		}
	}

	$this->setLastSyncResult(['updatedMessages' => 0, 'deletedMessages' => 0]);

	if (!$this->isTimeQuotaExceeded())
	{
		/*	Mark emails from unsynchronized folders (unchecked) for deletion

			It is impossible to check these filters for the legality of deleting messages,
			since:
			1) messages do not disappear from the original mailbox
			2) messages that fall under filters are in different folders,
			and the check goes through one folder.
		*/
		$result = $this->unregisterMessages([
			'!@DIR_MD5' => array_map(
				'md5',
				$this->getDirsHelper()->getSyncDirsPath(true)
			),
		],
		[
			'info' => 'disabled directory synchronization in Bitrix',
		],
		true);

		$countDeleted = $result ? $result->getCount() : 0;

		$this->lastSyncResult['deletedMessages'] += $countDeleted;

		$successfulReSyncCount = 0;

		if (!empty($this->syncParams['full']))
		{
			foreach ($dirsSync as $item)
			{
				$reSyncReport = $this->resyncDir($item->getPath());

				if($reSyncReport['complete'])
				{
					$syncReport['reSyncCount']++;
				}
				if ($this->isTimeQuotaExceeded())
				{
					break;
				}
			}

			if($syncReport['reSyncCount'] === count($dirsSync))
			{
				$syncReport['reSyncStatus'] = true;
			}
		}
	}

	return $syncReport;
}