friendica/src/Util/BasePath.php

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2019-02-03 22:22:04 +01:00
<?php
namespace Friendica\Util;
use Friendica\Core;
class BasePath
{
/**
* @brief Returns the base filesystem path of the App
*
* It first checks for the internal variable, then for DOCUMENT_ROOT and
* finally for PWD
*
* @param string|null $basepath
*
* @return string
*
* @throws \Exception if directory isn't usable
*/
public static function create($basepath)
{
if (!$basepath && !empty($_SERVER['DOCUMENT_ROOT'])) {
$basepath = $_SERVER['DOCUMENT_ROOT'];
}
if (!$basepath && !empty($_SERVER['PWD'])) {
$basepath = $_SERVER['PWD'];
}
return self::getRealPath($basepath);
}
/**
* @brief Returns a normalized file path
*
* This is a wrapper for the "realpath" function.
* That function cannot detect the real path when some folders aren't readable.
* Since this could happen with some hosters we need to handle this.
*
* @param string $path The path that is about to be normalized
* @return string normalized path - when possible
*/
public static function getRealPath($path)
{
$normalized = realpath($path);
if (!is_bool($normalized)) {
return $normalized;
} else {
return $path;
}
}
/**
* @brief Checks if a given directory is usable for the system
*
* @param $directory
* @param bool $check_writable
*
* @return boolean the directory is usable
*/
public static function isDirectoryUsable($directory, $check_writable = true)
{
if ($directory == '') {
Core\Logger::log('Directory is empty. This shouldn\'t happen.', Core\Logger::DEBUG);
return false;
}
if (!file_exists($directory)) {
Core\Logger::log('Path "' . $directory . '" does not exist for user ' . Core\System::getUser(), Core\Logger::DEBUG);
return false;
}
if (is_file($directory)) {
Core\Logger::log('Path "' . $directory . '" is a file for user ' . Core\System::getUser(), Core\Logger::DEBUG);
return false;
}
if (!is_dir($directory)) {
Core\Logger::log('Path "' . $directory . '" is not a directory for user ' . Core\System::getUser(), Core\Logger::DEBUG);
return false;
}
if ($check_writable && !is_writable($directory)) {
Core\Logger::log('Path "' . $directory . '" is not writable for user ' . Core\System::getUser(), Core\Logger::DEBUG);
return false;
}
return true;
}
}