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<?php
/** ******************************************
* LiteSpeed Web Server Cache Manager
*
* @author LiteSpeed Technologies, Inc. (https://www.litespeedtech.com)
* @copyright (c) 2018-2020
* ******************************************* */
namespace Lsc\Wp\Context;
use \Lsc\Wp\LSCMException;
use \Lsc\Wp\Logger;
/**
* Context is a singleton
*/
class Context
{
const LOCAL_PLUGIN_DIR = '/usr/src/litespeed-wp-plugin';
/**
* @var int
*/
protected $isRoot;
/**
* @var ContextOption
*/
protected $options;
/**
* @var string
*/
protected $dataDir;
/**
* @var string
*/
protected $dataFile;
/**
* @var string
*/
protected $customDataFile;
/**
* @var null|string
*/
protected $flagContent;
/**
*
* @var null|Context
*/
protected static $instance;
/**
*
* @param ContextOption $contextOption
*/
protected function __construct( ContextOption $contextOption )
{
$this->options = $contextOption;
$this->init();
}
protected function init()
{
$this->dataDir = realpath(__DIR__ . '/../../../..') . '/admin/lscdata';
$this->dataFile = $this->dataDir . '/lscm.data';
$this->customDataFile = $this->dataDir . '/lscm.data.cust';
$this->isRoot = $this->options->isRoot();
}
/**
*
* @since 1.9
*
* @return null
*/
protected function checkLocalPluginDirInCageFS()
{
$mpFile = '/etc/cagefs/cagefs.mp';
$mountFile = '/proc/mounts';
if ( !file_exists($mpFile) ) {
return;
}
Logger::debug('Detected cagefs.mp file.');
$localPluginDir = self::LOCAL_PLUGIN_DIR;
$pattern = "=^((?!deleted).)*{$localPluginDir}((?!deleted).)*$=m";
$result = preg_grep($pattern, file($mountFile));
$procMountSet = ! empty($result);
if ( ! $procMountSet ) {
Logger::debug("Data dir not set in {$mountFile}.");
$pattern="=^.*{$localPluginDir}.*$=m";
$result = preg_grep($pattern, file($mpFile));
$setInMpFile = ! empty($result);
if ( ! $setInMpFile ) {
file_put_contents(
$mpFile,
"\n{$localPluginDir}",
FILE_APPEND
);
Logger::notice('Added data dir to cagefs.mp.');
}
exec('/usr/sbin/cagefsctl --remount-all', $output, $return_var);
Logger::notice('Remounted CageFS.');
}
else {
Logger::debug('Data dir already added to CageFS.');
}
}
/**
*
* @throws LSCMException
*/
protected function createDataDir()
{
if ( !file_exists($this->dataDir) && !mkdir($this->dataDir, 0755) ) {
throw new LSCMException(
"Fail to create data directory {$this->dataDir}.",
LSCMException::E_PERMISSION
);
}
}
/**
*
* @since 1.9
*
* @throws LSCMException
*/
protected function createLocalPluginDir()
{
if ( !file_exists(Context::LOCAL_PLUGIN_DIR)
&& !mkdir(Context::LOCAL_PLUGIN_DIR, 0755) ) {
throw new LSCMException(
"Fail to create local plugin directory "
. Context::LOCAL_PLUGIN_DIR . '.',
LSCMException::E_PERMISSION
);
}
}
/**
*
* @return ContextOption
* @throws LSCMException Thrown indirectly.
*/
public static function getOption()
{
return self::me(true)->options;
}
/**
*
* @since 1.9.1 Added optional parameter $loggerObj.
*
* @param ContextOption $contextOption
* @param object $loggerObj Object implementing all public
* Logger class functions.
* @throws LSCMException
*/
public static function initialize( ContextOption $contextOption,
$loggerObj = null )
{
if ( self::$instance != null ) {
/**
* Do not allow, must initialize first.
*/
throw new LSCMException(
'Context cannot be initialized twice.',
LSCMException::E_PROGRAM
);
}
self::$instance = new self($contextOption);
if ( $loggerObj != null ) {
Logger::setInstance($loggerObj);
}
else {
$loggerClass = $contextOption->getLoggerClass();
$loggerClass::Initialize($contextOption);
}
if ( self::$instance->isRoot == ContextOption::IS_ROOT ) {
self::$instance->createDataDir();
self::$instance->createLocalPluginDir();
self::$instance->checkLocalPluginDirInCageFS();
}
}
/**
* Checks if the current instance is lacking the expected level of
* permissions.
*
* @return boolean
*/
protected function hasInsufficentPermissions()
{
$expectedPermissions =
self::$instance->options->getExpectedPermissions();
return (self::$instance->isRoot < $expectedPermissions);
}
/**
*
* @param boolean $checkPerms
* @return Context
* @throws LSCMException
*/
protected static function me( $checkPerms = false )
{
if ( self::$instance == null ) {
/**
* Do not allow, must initialize first.
*/
throw new LSCMException(
'Uninitialized context.',
LSCMException::E_NON_FATAL
);
}
if ( $checkPerms && self::$instance->hasInsufficentPermissions() ) {
throw new LSCMException(
'Access denied: Insufficient permissions.',
LSCMException::E_NON_FATAL
);
}
return self::$instance;
}
/**
*
* @return string
* @throws LSCMException
*/
public static function getLSCMDataDir()
{
return self::me()->dataDir;
}
/**
* Deprecated 06/19/19. Shift to using getLSCMDataFiles() instead.
*
* @deprecated
* @return string
*/
public static function getLSCMDataFile()
{
$dataFiles = self::getLSCMDataFiles();
return $dataFiles['dataFile'];
}
/**
*
* @return string[]
* @throws LSCMException Thrown indirectly.
*/
public static function getLSCMDataFiles()
{
try {
$dataFile = self::me(true)->dataFile;
$custDataFile = self::me(true)->customDataFile;
}
catch ( LSCMException $e ) {
$msg = $e->getMessage() . ' Could not get data file paths.';
Logger::debug($msg);
throw new LSCMException($msg);
}
return array(
'dataFile' => $dataFile,
'custDataFile' => $custDataFile
);
}
/**
*
* @return int
*/
public static function isRoot()
{
return self::me()->isRoot;
}
/**
*
* @return boolean
* @throws LSCMException Thrown indirectly.
*/
public static function isPrivileged()
{
return (self::me()->isRoot > ContextOption::IS_NOT_ROOT);
}
/**
*
* @return int
* @throws LSCMException Thrown indirectly.
*/
public static function getScanDepth()
{
return self::me()->options->getScanDepth();
}
/**
*
* @return int
* @throws LSCMException Thrown indirectly.
*/
public static function getActionTimeout()
{
$timeout = self::me()->options->getBatchTimeout();
if ( $timeout > 1 ) {
return time() + $timeout;
}
/**
* No timeout.
*/
return 0;
}
/**
*
* @return string
* @throws LSCMException Thrown indirectly.
*/
public static function getFlagFileContent()
{
$m = self::me();
if ( $m->flagContent == null ) {
$m->flagContent = <<<CONTENT
This file was created by LiteSpeed Web Cache Manager
When this file exists, your LiteSpeed Cache plugin for WordPress will NOT be affected
by Mass Enable/Disable operations performed through LiteSpeed Web Cache Manager.
Please DO NOT ATTEMPT to remove this file unless you understand the above.
CONTENT;
}
return $m->flagContent;
}
}