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<?php |
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namespace Twistor\Flysystem\Plugin; |
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use League\Flysystem\AdapterInterface; |
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use Twistor\FlysystemStreamWrapper; |
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use Twistor\PosixUid; |
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use Twistor\Uid; |
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class Stat extends AbstractPlugin |
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{ |
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/** |
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* Default return value of url_stat(). |
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* |
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* @var array |
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*/ |
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protected static $defaultMeta = [ |
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'dev' => 0, |
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'ino' => 0, |
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'mode' => 0, |
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'nlink' => 0, |
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'uid' => 0, |
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'gid' => 0, |
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'rdev' => 0, |
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'size' => 0, |
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'atime' => 0, |
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'mtime' => 0, |
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'ctime' => 0, |
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'blksize' => -1, |
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'blocks' => -1, |
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]; |
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/** |
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* Permission map. |
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* |
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* @var array |
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*/ |
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protected $permissions; |
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/** |
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* Required metadata. |
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* |
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* @var array |
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*/ |
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protected $required; |
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/** |
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* @var \Twistor\Uid |
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*/ |
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protected $uid; |
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/** |
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* Constructs a Stat object. |
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* |
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* @param array $permissions An array of permissions. |
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* @param array $metadata The default required metadata. |
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*/ |
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public function __construct(array $permissions, array $metadata) |
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{ |
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$this->permissions = $permissions; |
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$this->required = array_combine($metadata, $metadata); |
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$this->uid = \extension_loaded('posix') ? new PosixUid() : new Uid(); |
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} |
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/** |
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* @inheritdoc |
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*/ |
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public function getMethod() |
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{ |
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return 'stat'; |
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} |
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/** |
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* Emulates stat(). |
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* |
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* @param string $path |
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* @param int $flags |
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* |
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* @return array Output similar to stat(). |
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* |
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* @throws \League\Flysystem\FileNotFoundException |
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* |
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* @see stat() |
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*/ |
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public function handle($path, $flags) |
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{ |
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if ($path === '') { |
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return $this->mergeMeta(['type' => 'dir', 'visibility' => AdapterInterface::VISIBILITY_PUBLIC]); |
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} |
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$ignore = $flags & FlysystemStreamWrapper::STREAM_URL_IGNORE_SIZE ? ['size'] : []; |
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$metadata = $this->getWithMetadata($path, $ignore); |
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// It's possible for getMetadata() to fail even if a file exists. |
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if (empty($metadata)) { |
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return static::$defaultMeta; |
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} |
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return $this->mergeMeta($metadata + ['visibility' => AdapterInterface::VISIBILITY_PUBLIC]); |
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} |
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/** |
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* Returns metadata. |
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* |
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* @param string $path The path to get metadata for. |
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* @param array $ignore Metadata to ignore. |
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* |
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* @return array The metadata as returned by Filesystem::getMetadata(). |
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* |
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* @throws \League\Flysystem\FileNotFoundException |
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* |
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* @see \League\Flysystem\Filesystem::getMetadata() |
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*/ |
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protected function getWithMetadata($path, array $ignore) |
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{ |
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$metadata = $this->filesystem->getMetadata($path); |
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if (empty($metadata)) { |
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return []; |
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} |
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$keys = array_diff($this->required, array_keys($metadata), $ignore); |
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foreach ($keys as $key) { |
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$method = 'get' . ucfirst($key); |
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try { |
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$metadata[$key] = $this->filesystem->$method($path); |
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} catch (\LogicException $e) { |
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// Some adapters don't support certain metadata. For instance, |
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// the Dropbox adapter throws exceptions when calling |
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// getVisibility(). Remove the required key so we don't keep |
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// calling it. |
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unset($this->required[$key]); |
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} |
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} |
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return $metadata; |
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} |
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/** |
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* Normalize a permissions string. |
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* |
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* @param string $permissions |
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* |
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* @return int |
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*/ |
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protected function normalizePermissions($permissions) |
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{ |
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if (is_numeric($permissions)) { |
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return $permissions & 0777; |
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} |
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// remove the type identifier |
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$permissions = substr($permissions, 1); |
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// map the string rights to the numeric counterparts |
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$map = ['-' => '0', 'r' => '4', 'w' => '2', 'x' => '1']; |
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$permissions = strtr($permissions, $map); |
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// split up the permission groups |
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$parts = str_split($permissions, 3); |
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// convert the groups |
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$mapper = function ($part) { |
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return array_sum(str_split($part)); |
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}; |
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// converts to decimal number |
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return octdec(implode('', array_map($mapper, $parts))); |
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} |
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/** |
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* Merges the available metadata from Filesystem::getMetadata(). |
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* |
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* @param array $metadata The metadata. |
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* |
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* @return array All metadata with default values filled in. |
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*/ |
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protected function mergeMeta(array $metadata) |
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{ |
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$ret = static::$defaultMeta; |
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$ret['uid'] = $this->uid->getUid(); |
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$ret['gid'] = $this->uid->getGid(); |
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$ret['mode'] = $metadata['type'] === 'dir' ? 040000 : 0100000; |
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$visibility = $metadata['visibility']; |
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if ($visibility != AdapterInterface::VISIBILITY_PUBLIC && $visibility != AdapterInterface::VISIBILITY_PRIVATE) { |
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$visibility = $this->normalizePermissions($visibility) & 0044 ? AdapterInterface::VISIBILITY_PUBLIC : AdapterInterface::VISIBILITY_PRIVATE; |
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} |
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$ret['mode'] += $this->permissions[$metadata['type']][$visibility]; |
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if (isset($metadata['size'])) { |
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$ret['size'] = (int) $metadata['size']; |
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} |
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if (isset($metadata['timestamp'])) { |
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$ret['mtime'] = (int) $metadata['timestamp']; |
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$ret['ctime'] = (int) $metadata['timestamp']; |
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} |
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$ret['atime'] = time(); |
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return array_merge(array_values($ret), $ret); |
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} |
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} |
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twistor /
flysystem-stream-wrapper
