.-.-.-.-.-

<?php
namespace Bitrix\Landing;

class Folder extends \Bitrix\Landing\Internals\BaseTable
{
	/**
	 * Internal class.
	 * @var string
	 */
	public static $internalClass = 'FolderTable';

/**
	 * Deletes all folders for site.
	 * @param int $siteId Site id.
	 * @return void
	 */
	public static function deleteForSite(int $siteId): void
	{
		$res = self::getList([
			'select' => [
				'ID'
			],
			'filter' => [
				'SITE_ID' => $siteId
			]
		]);
		while ($row = $res->fetch())
		{
			parent::delete($row['ID']);
		}
	}

/**
	 * Returns breadcrumbs for folder of site.
	 * @param int $folderId Folder id.
	 * @param int|null $siteId Site id (optional, but desirable for optimisation).
	 * @return array
	 */
	public static function getBreadCrumbs(int $folderId, ?int $siteId = null): array
	{
		static $cacheFolders = [];
		$crumbs = [];

if (!$siteId)
		{
			$res = self::getList([
				'select' => [
					'SITE_ID'
				],
				'filter' => [
					'ID' => $folderId
				],
				'limit' => 1
			]);
			if ($row = $res->fetch())
			{
				$siteId = $row['SITE_ID'];
			}
		}

if (!$siteId)
		{
			return $crumbs;
		}

// get all folder's chunks for the site
		if (!array_key_exists($siteId, $cacheFolders))
		{
			$cacheFolders[$siteId] = [];
			$res = self::getList([
				'select' => [
					'ID', 'TITLE', 'INDEX_ID', 'CODE',
					'PARENT_ID', 'ACTIVE', 'DELETED'
				],
				'filter' => [
					'SITE_ID' => $siteId
				]
			]);
			while ($row = $res->fetch())
			{
				$cacheFolders[$siteId][$row['ID']] = $row;
			}
		}

if (!$cacheFolders[$siteId])
		{
			return $crumbs;
		}

// build recursively
		$folders = $cacheFolders[$siteId];
		do
		{
			if (!isset($folders[$folderId]))
			{
				break;
			}
			$crumbs[] = $folders[$folderId];
			$folderId = $folders[$folderId]['PARENT_ID'];
		}
		while ($folderId);

return array_reverse($crumbs);
	}

/**
	 * Returns breadcrumbs for folder of site as string.
	 * @param int $folderId Folder id.
	 * @param string $glue Glue for implode breadcrumbs.
	 * @param int|null $siteId Site id (optional, but desirable for optimisation).
	 * @return string
	 */
	public static function getBreadCrumbsString(int $folderId, string $glue, ?int $siteId = null): string
	{
		$path = [];
		$crumbs = self::getBreadCrumbs($folderId, $siteId);
		foreach ($crumbs as $crumb)
		{
			$path[] = $crumb['TITLE'];
		}
		return implode($glue, $path);
	}

/**
	 * Returns folder's full path with parents folders.
	 * @param int $folderId Folder id.
	 * @param int|null $siteId Site id (optional, but desirable for optimisation).
	 * @param array &$lastFolder Last folder item.
	 * @return string
	 */
	public static function getFullPath(int $folderId, ?int $siteId = null, array &$lastFolder = []): string
	{
		$codes = [];

foreach (self::getBreadCrumbs($folderId, $siteId) as $folder)
		{
			$lastFolder = $folder;
			$codes[] = $folder['CODE'];
		}

return '/' . implode('/', $codes) . '/';
	}
}

/var/www/axolotl/data/www/b24.axolotl.ru/./public_html/bitrix/modules/landing/lib/folder.php