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<?php |
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declare(strict_types=1); |
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/* |
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* This file is part of the Packagist Mirror. |
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* |
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* For the full license information, please view the LICENSE.md |
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* file that was distributed with this source code. |
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*/ |
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namespace Webs\Mirror; |
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use League\Flysystem\Filesystem as FlyFilesystem; |
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use League\Flysystem\Adapter\Local; |
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use Exception; |
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/** |
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* Middleware to access filesystem with transparent gz encode/decode. |
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* |
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* @author Webysther Nunes <[email protected]> |
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*/ |
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class Filesystem |
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{ |
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use GZip; |
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use IO; |
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/** |
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* @var FlyFilesystem |
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*/ |
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protected $filesystem; |
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/** |
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* Ephemeral cache for folder files count. |
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* |
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* @var array |
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*/ |
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protected $countedFolder = []; |
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/** |
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* @param string $dir Base directory |
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* @param bool $initialize If true initialize the filesystem access |
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*/ |
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public function __construct($baseDirectory) |
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{ |
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$this->directory = $baseDirectory.'/'; |
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// Create the adapter |
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$localAdapter = new Local($this->directory); |
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// And use that to create the file system |
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$this->filesystem = new FlyFilesystem($localAdapter); |
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} |
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/** |
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* @param FlyFilesystem $filesystem |
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*/ |
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public function setFilesystem(FlyFilesystem $filesystem):Filesystem |
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{ |
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$this->filesystem = $filesystem; |
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return $this; |
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} |
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/** |
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* Add suffix gz to json file. |
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* |
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* @param string $path |
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* |
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* @return string |
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*/ |
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public function getGzName(string $path):string |
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{ |
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$fullPath = $this->getFullPath($path); |
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$extension = pathinfo($fullPath, PATHINFO_EXTENSION); |
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if ($extension == 'json') { |
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return $path.'.gz'; |
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} |
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return $path; |
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} |
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/** |
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* Get link name from gz. |
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* |
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* @param string $path |
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* |
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* @return string |
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*/ |
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protected function getLink(string $path):string |
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{ |
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$fullPath = $this->getFullPath($path); |
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$extension = pathinfo($fullPath, PATHINFO_EXTENSION); |
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if ($extension == 'gz') { |
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return substr($path, 0, -3); |
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} |
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return $path; |
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} |
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/** |
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* Decode from gz after read from disk. |
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* |
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* @see FlyFilesystem::read |
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*/ |
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public function read(string $path):string |
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{ |
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$path = $this->getGzName($path); |
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$file = $this->filesystem->read($path); |
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if ($file === false) { |
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return ''; |
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} |
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return (string) $this->decode($file); |
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} |
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/** |
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* Encode to gz before write to disk with hash checking. |
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* |
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* @see FlyFilesystem::write |
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*/ |
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public function write(string $path, string $contents):Filesystem |
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{ |
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$file = $this->getGzName($path); |
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$this->filesystem->put($file, $this->encode($contents)); |
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$decoded = $this->decode($contents); |
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if ($this->getHash($decoded) != $this->getHashFile($file)) { |
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$this->filesystem->delete($file); |
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throw new Exception("Write file $path hash failed"); |
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} |
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$this->symlink($file); |
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return $this; |
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} |
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/** |
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* Simple touch. |
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* |
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* @param string $path |
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* |
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* @return Filesystem |
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*/ |
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public function touch(string $path):Filesystem |
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{ |
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if ($this->has($path)) { |
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return $this; |
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} |
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touch($this->getFullPath($path)); |
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return $this; |
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} |
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/** |
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* @param string $file |
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* |
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* @return bool |
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*/ |
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protected function isGzFile(string $file):bool |
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{ |
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if (substr($this->getGzName($file), -3) == '.gz') { |
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return true; |
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} |
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return false; |
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} |
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/** |
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* Create a symlink. |
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* |
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* @param string $file |
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* |
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* @return Filesystem |
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*/ |
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protected function symlink(string $file):Filesystem |
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{ |
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if (!$this->hasFile($file) || !$this->isGzFile($file)) { |
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return $this; |
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} |
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$path = $this->getGzName($file); |
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$link = $this->getFullPath($this->getLink($path)); |
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if ($this->hasLink($link)) { |
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return $this; |
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} |
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if (strpos($link, 'vfs://') !== false) { |
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return $this; |
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} |
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symlink(basename($path), $link); |
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return $this; |
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} |
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/** |
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* @see FlyFilesystem::has |
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*/ |
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public function has(string $path):bool |
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{ |
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return $this->hasFile($path) && $this->hasLink($path); |
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} |
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/** |
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* @see FlyFilesystem::has |
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*/ |
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public function hasFile(string $path):bool |
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{ |
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return file_exists($this->getFullPath($this->getGzName($path))); |
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} |
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/** |
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* @see FlyFilesystem::has |
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*/ |
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protected function hasLink(string $path):bool |
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{ |
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return is_link($this->getFullPath($this->getLink($path))); |
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} |
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/** |
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* Move to not dot name of file. |
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* |
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* @param string $from |
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* |
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* @return Filesystem |
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*/ |
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public function move(string $from):Filesystem |
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{ |
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if (!$this->has($from)) { |
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return $this; |
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} |
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$file = $this->getGzName($from); |
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$target = substr($file, 1); |
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if ($this->has($target)) { |
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$this->delete($target); |
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} |
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retry(8, function() use ($from, $target) { |
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$this->filesystem->rename($this->getGzName($from), $target); |
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}, 250); |
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$this->symlink($target); |
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// remove old symlink |
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$this->delete($from); |
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return $this; |
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} |
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/** |
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* @see FlyFilesystem::delete |
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* @see FlyFilesystem::deleteDir |
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*/ |
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public function delete(string $fileOrDirectory):Filesystem |
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{ |
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$path = $this->getFullPath($fileOrDirectory); |
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if (is_dir($path)) { |
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$this->filesystem->deleteDir($fileOrDirectory); |
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return $this; |
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} |
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$file = $this->getGzName($path); |
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if (file_exists($file)) { |
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unlink($file); |
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} |
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$link = $this->getLink($path); |
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if (is_link($link)) { |
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unlink($link); |
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} |
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return $this; |
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} |
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/** |
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* Calculates SHA256. |
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* |
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* @param string $string |
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* |
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* @return string |
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*/ |
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public function getHash(string $string):string |
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{ |
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return hash('sha256', $string); |
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} |
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/** |
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* Calculates SHA256 for file. |
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* |
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* @param string $path |
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* |
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* @return string |
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*/ |
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public function getHashFile(string $path):string |
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{ |
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// dont use hash_file because content is saved with gz |
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return $this->getHash($this->read($path)); |
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} |
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} |
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