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<?php
namespace League\Flysystem;
use League\Flysystem\Util\MimeType;
use LogicException;
class Util
{
/**
* Get normalized pathinfo.
*
* @param string $path
*
* @return array pathinfo
*/
public static function pathinfo($path)
{
$pathinfo = pathinfo($path) + compact('path');
$pathinfo['dirname'] = array_key_exists('dirname', $pathinfo)
? static::normalizeDirname($pathinfo['dirname']) : '';
return $pathinfo;
}
/**
* Normalize a dirname return value.
*
* @param string $dirname
*
* @return string normalized dirname
*/
public static function normalizeDirname($dirname)
{
return $dirname === '.' ? '' : $dirname;
}
/**
* Get a normalized dirname from a path.
*
* @param string $path
*
* @return string dirname
*/
public static function dirname($path)
{
return static::normalizeDirname(dirname($path));
}
/**
* Map result arrays.
*
* @param array $object
* @param array $map
*
* @return array mapped result
*/
public static function map(array $object, array $map)
{
$result = [];
foreach ($map as $from => $to) {
if ( ! isset($object[$from])) {
continue;
}
$result[$to] = $object[$from];
}
return $result;
}
/**
* Normalize path.
*
* @param string $path
*
* @throws LogicException
*
* @return string
*/
public static function normalizePath($path)
{
// Remove any kind of funky unicode whitespace
$normalized = preg_replace('#\p{C}+|^\./#u', '', $path);
$normalized = static::normalizeRelativePath($normalized);
if (preg_match('#/\.{2}|^\.{2}/|^\.{2}$#', $normalized)) {
throw new LogicException(
'Path is outside of the defined root, path: [' . $path . '], resolved: [' . $normalized . ']'
);
}
$normalized = preg_replace('#\\\{2,}#', '\\', trim($normalized, '\\'));
$normalized = preg_replace('#/{2,}#', '/', trim($normalized, '/'));
return $normalized;
}
/**
* Normalize relative directories in a path.
*
* @param string $path
*
* @return string
*/
public static function normalizeRelativePath($path)
{
// Path remove self referring paths ("/./").
$path = preg_replace('#/\.(?=/)|^\./|(/|^)\./?$#', '', $path);
// Regex for resolving relative paths
$regex = '#/*[^/\.]+/\.\.#Uu';
while (preg_match($regex, $path)) {
$path = preg_replace($regex, '', $path);
}
return $path;
}
/**
* Normalize prefix.
*
* @param string $prefix
* @param string $separator
*
* @return string normalized path
*/
public static function normalizePrefix($prefix, $separator)
{
return rtrim($prefix, $separator) . $separator;
}
/**
* Get content size.
*
* @param string $contents
*
* @return int content size
*/
public static function contentSize($contents)
{
return defined('MB_OVERLOAD_STRING') ? mb_strlen($contents, '8bit') : strlen($contents);
}
/**
* Guess MIME Type based on the path of the file and it's content.
*
* @param string $path
* @param string|resource $content
*
* @return string|null MIME Type or NULL if no extension detected
*/
public static function guessMimeType($path, $content)
{
$mimeType = MimeType::detectByContent($content);
if ( ! (empty($mimeType) || in_array($mimeType, ['application/x-empty', 'text/plain', 'text/x-asm']))) {
return $mimeType;
}
return MimeType::detectByFilename($path);
}
/**
* Emulate directories.
*
* @param array $listing
*
* @return array listing with emulated directories
*/
public static function emulateDirectories(array $listing)
{
$directories = [];
$listedDirectories = [];
foreach ($listing as $object) {
list($directories, $listedDirectories) = static::emulateObjectDirectories(
$object,
$directories,
$listedDirectories
);
}
$directories = array_diff(array_unique($directories), array_unique($listedDirectories));
foreach ($directories as $directory) {
$listing[] = static::pathinfo($directory) + ['type' => 'dir'];
}
return $listing;
}
/**
* Ensure a Config instance.
*
* @param null|array|Config $config
*
* @return Config config instance
*
* @throw LogicException
*/
public static function ensureConfig($config)
{
if ($config === null) {
return new Config();
}
if ($config instanceof Config) {
return $config;
}
if (is_array($config)) {
return new Config($config);
}
throw new LogicException('A config should either be an array or a Flysystem\Config object.');
}
/**
* Rewind a stream.
*
* @param resource $resource
*/
public static function rewindStream($resource)
{
if (ftell($resource) !== 0 && static::isSeekableStream($resource)) {
rewind($resource);
}
}
public static function isSeekableStream($resource)
{
$metadata = stream_get_meta_data($resource);
return $metadata['seekable'];
}
/**
* Get the size of a stream.
*
* @param resource $resource
*
* @return int stream size
*/
public static function getStreamSize($resource)
{
$stat = fstat($resource);
return $stat['size'];
}
/**
* Emulate the directories of a single object.
*
* @param array $object
* @param array $directories
* @param array $listedDirectories
*
* @return array
*/
protected static function emulateObjectDirectories(array $object, array $directories, array $listedDirectories)
{
if ($object['type'] === 'dir') {
$listedDirectories[] = $object['path'];
}
if (empty($object['dirname'])) {
return [$directories, $listedDirectories];
}
$parent = $object['dirname'];
while ( ! empty($parent) && ! in_array($parent, $directories)) {
$directories[] = $parent;
$parent = static::dirname($parent);
}
if (isset($object['type']) && $object['type'] === 'dir') {
$listedDirectories[] = $object['path'];
return [$directories, $listedDirectories];
}
return [$directories, $listedDirectories];
}
}
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