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Added currently unused find_iterator which allows less memory intensive file 'find' operations
This commit is contained in:
Andreas Stöckel
parent
58993cfb7b
commit
98383800ae
738
phpgwapi/inc/class.egw_find_iterator.inc.php
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738
phpgwapi/inc/class.egw_find_iterator.inc.php
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@ -0,0 +1,738 @@
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<?php
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/**
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* eGroupWare API: Find Iterator - classes to iterate over large directory trees
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* This is a rewrite of the original egw_vfs::find function, original author
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* Ralf Becker <RalfBecker-AT-outdoor-training.de>
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*
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* @link http://www.egroupware.org
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* @license http://opensource.org/licenses/gpl-license.php GPL - GNU General Public License
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* @package api
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* @subpackage vfs
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* @author Andreas Stoeckel
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* @copyright (c) 2010 by Andreas Stoeckel
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* @version $Id$
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*/
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define("FILTER_NOFOLLOW", 2); //Display the element but do not follow
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define("FILTER_OK", 1); //The filter has passed
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define("FILTER_DISPLAY", -1); //The element filtered should not be returned to the caller of find, it should not be displayed
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define("FILTER_ALL", -2); //The element didn't pass the filter
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function translate_path($path, $isurl) {
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return $isurl ? $path : egw_vfs::PREFIX.parse_url($path, PHP_URL_PATH);
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}
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class egw_find_file
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{
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private $isurl = false;
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private $need_mime = false;
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private $base_path = "";
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private $stat = null;
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private $mime = null;
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private $props = null;
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private $result = null;
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public $filename = ''; //< The filename including the file path, e.g. /home/user/example.file
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public $path = ''; //< The filename, e.g. example.file
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public $name = ''; //< The file path, e.g. /home/user/
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public $isdot = false;
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public $filterstate = FILTER_ALL;
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public function __construct($path, $isurl, $need_mime)
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{
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//Copy the given parameters
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$this->isurl = $isurl;
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$this->need_mime = $need_mime;
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$this->pair_result = $pair_result;
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$this->base_path = $path;
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//Set filename, path and path + name as this information will most likely
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//be needed
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$paths = $this->isurl ? explode('/', $path) : explode('/', parse_url($path, PHP_URL_PATH));
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$this->name = implode('/',$paths);
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$this->filename = array_pop($paths);
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$this->path = implode('/',$paths).'/';
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$this->is_dot = ($this->filename == '.') || ($this->filename == '..');
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}
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public function get_stat()
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{
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//Check whether the stat data has already been created, if not, create it
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if ($this->stat === null)
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{
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$this->stat = $this->isurl ? lstat($this->base_path) :
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egw_vfs::url_stat($this->base_path, STREAM_URL_STAT_LINK);
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//Remove numerical indices 0-12
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$this->stat = array_slice($this->stat, 13);
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};
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return $this->stat;
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}
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public function get_mime()
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{
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//Check if the mime data has already been read, if not, read it
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if ($this->mime === null)
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$res['mime'] = egw_vfs::mime_content_type($this->base_path);
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return $this->mime;
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}
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public function get_props()
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{
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//Check whether props has already been read, if not, read it
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if ($this->props === null)
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{
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$this->props = array(
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"isfile" => is_file($this->base_path),
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"isdir" => is_dir($this->base_path),
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"islink" => is_link($this->base_path),
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);
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if ($this->props['islink'])
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$this->props['linktarget'] = readlink($this->base_path);
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}
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return $this->props;
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}
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public function get_result($pair_result)
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{
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//Check whether the result has already been produced, if not, produce it
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if ($this->result === null)
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{
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//Check whether only the file name/path should be returned or the complete
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//resultset
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if ($pair_result)
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{
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//Copy the state and add some custom information
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$this->result = $this->get_stat();
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$this->result['path'] = $this->name;
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$this->result['name'] = $this->filename;
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if ($this->need_mime)
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$this->result['mime'] = $this->get_mime();
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}
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else
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{
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$this->result = $this->name;
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}
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}
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return $this->result;
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}
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public function translate_path()
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{
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return translate_path($this->name, $this->isurl);
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}
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}
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/*
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* egw_directory_iterator_filter filters files based on the options set supplied during
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* construction. It is used by the RecursiveDirectoryIteratorWrapper and
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* FindIterator classes. Filtering is performed by calling the "filter" function
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* and passing an url_state array.
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*/
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class egw_directory_iterator_filter
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{
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//Parsed options
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private $hidden = false;
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private $type = null;
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private $name_preg = null;
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private $path_preg = null;
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private $curkey = 0;
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private $lcur = null;
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private $uid = null;
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private $gid = null;
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private $ctime = null;
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private $mtime = null;
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private $cmin = null;
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private $mmin = null;
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private $size = null;
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private $empty = true;
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private $follow = false;
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private $mime = null;
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/*
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* check_num is internally used to compare strings/numerical values.
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* @param(value is an integer parameter)
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* @param(argument may be a string or an integer. If argument is an integer
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* the result gets true if argument equals value. If argument is a string, the
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* first char, which may be '+' or '-' defines whether the result gets true if
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* value is greater than argument (+) or when it is smaller than argument (-))
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*/
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private static function check_num($value, $argument)
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{
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if (is_int($argument) && $argument >= 0 || $argument[0] != '-' && $argument[0] != '+')
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return $value == $argument;
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if ($argument < 0)
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return $value < abs($argument);
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return $value > (int) substr($argument,1);
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}
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public function __construct($options)
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{
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//Preprocess the parameters
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$this->hidden = isset($options['hidden']) ? $options['hidden'] : false;
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$this->type = isset($options['type']) ? $options['type'] : null;
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$this->name_preg = isset($options['name_preg']) ? $options['name_preg'] : null;
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$this->path_preg = isset($options['path_preg']) ? $options['path_preg'] : null;
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$this->cmin = isset($options['cmin']) ? $options['cmin'] : null;
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$this->mmin = isset($options['mmin']) ? $options['mmin'] : null;
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$this->ctime = isset($options['ctime']) ? $options['ctime'] : null;
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$this->mtime = isset($options['mtime']) ? $options['mtime'] : null;
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$this->empty = isset($options['empty']) ? $options['empty'] : true;
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$this->size = isset($options['size']) ? $options['size'] : null;
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$this->follow = isset($options['follow']) ? $options['follow'] : false;
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$this->mime = isset($options['mime']) ? $options['mime'] : null;
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//Convert the (probably) given path/name filters to regular expressions
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if (isset($options['name']) && !isset($options['name_preg'])) // change from simple *,? wildcards to preg regular expression once
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$this->name_preg = '/^'.str_replace(array('\\?','\\*'),
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array('.{1}','.*'), preg_quote($options['name'])).'$/i';
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if (isset($options['path']) && !isset($options['preg_path'])) // change from simple *,? wildcards to preg regular expression once
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$this->path_preg = '/^'.str_replace(array('\\?','\\*'),
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array('.{1}','.*'), preg_quote($options['path'])).'$/i';
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//Translate username to uid
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if (!isset($options['uid']))
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{
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if (isset($options['user']))
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{
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$this->uid = $GLOBALS['egw']->accounts->name2id($options['user'],'account_lid','u');
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}
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elseif (isset($options['nouser']))
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{
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$this->uid = 0;
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}
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}
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else
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{
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$this->uid = $options['uid'];
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}
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//Translate groupid to gid
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if (!isset($options['gid']))
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{
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if (isset($options['group']))
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{
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$this->gid = abs($GLOBALS['egw']->accounts->name2id($options['group'],'account_lid','g'));
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}
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elseif (isset($options['nogroup']))
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{
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$this->gid = 0;
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}
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}
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else
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{
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$this->gid = $options['group'];
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}
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}
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public function filter($findfile)
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{
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if ($findfile)
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{
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//Exclude directory and parent directory
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if ($findfile->isdot)
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return FILTER_ALL;
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//Exclude hidden files
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if (!$this->hidden && (($findfile->filename[0] == '.') || ($findfile->filename == 'Thumbs.db')))
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return FILTER_ALL;
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//Read the file properties (like (is link etc.))
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$props = $findfile->get_props();
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//If this is a directory, we probably need to keep this entry to crawl
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//for files inside this directory. That's what FILTER_DISPLAY is for
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if ($props['isdir'] && (!($props['islink']) || $this->follow))
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$dir_filter = FILTER_DISPLAY;
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else
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$dir_filter = FILTER_ALL;
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//Exclude files/directories based on the given regular expression
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if ($this->name_preg && !preg_match($this->name_preg, $findfile->filename) ||
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$this->path_preg && !preg_match($this->path_preg, $findfile->path))
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return $dir_filter;
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//Exclude directories/symlinks/files
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if ($this->type && ($this->type == 'd') == !($props['isdir'] && !$props['islink']) ||
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(($this->type == 'F') && ($props['isdir'] || $props['islink'])))
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return $dir_filter;
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if (($this->cmin !== null) || ($this->mmin !== null) ||
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($this->ctime !== null) || ($this->mtime !== null) ||
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($this->size !== null) || (!$this->empty) ||
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($this->gid !== null) || ($this->uid !== null))
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{
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//Check user/group
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if (($this->gid !== null) && $stat['gid'] != $options['gid'] ||
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($this->uid !== null) && $stat['uid'] != $options['uid'])
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{
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return FILTER_ALL; // wrong user or group
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}
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//Retrieve the file stat
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$stat = $this->get_stat();
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//Excludes files where the creation/last modification timestamps is greater than
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//the given time
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if ($this->cmin && !self::check_num(round((time()-$stat['ctime'])/60), $this->cmin) ||
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$this->mmin && !self::check_num(round((time()-$stat['mtime'])/60), $this->mmin) ||
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$this->ctime && !self::check_num(round((time()-$stat['ctime'])/86400), $this->ctime) ||
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$this->mtime && !self::check_num(round((time()-$stat['mtime'])/86400), $this->mtime))
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{
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return $dir_filter;
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}
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//Check filesize
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if (($this->size !== null) && !self::check_num($stat['size'], $this->size) ||
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(!$this->empty && $stat['size'] <= 0)) //TODO Check this
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{
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return $dir_filter;
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}
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}
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//Check the mime type and subtype. As loading the mime type takes the
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//longest time, it is postponed as long as possible
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if ($this->mime !== null) {
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$mime = $findfile->get_mime();
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if ($options['mime'] != $mime)
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{
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list($type, $subtype) = explode('/', $this->mime);
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// no subtype (eg. 'image') --> check only the main type
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if ($sub_type || substr($this->mime, 0, strlen($type)+1) != $type.'/')
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return $dir_filter; // wrong mime-type
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}
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}
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//Return FILTER_OK, if the filters have passed
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return FILTER_OK;
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}
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else
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{
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return FILTER_ALL;
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}
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}
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}
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class egw_recursive_directory_iterator_wrapper implements RecursiveIterator
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{
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private $base = "";
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private $exec = null;
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private $exec_params = null;
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private $filter = null;
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private $elements = null;
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private $index = 0;
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private $iterator = null;
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private $follow = false;
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private $sortfunc;
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private $sort = false;
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private $url = false;
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private $needmime = false;
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private function fillelemarray()
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{
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//Fill the "elements" array with all filestates
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$this->elements = array();
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//Loop through each element of the recursive directory iterator
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foreach($this->iterator as $key => $value)
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{
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//Create a new egw_find_file class for each entry and filter it
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$findfile = new egw_find_file(
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$this->iterator->getPath().'/'.$this->iterator->getFilename(),
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$this->url, $this->needmime);
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//Filter the element
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$filterresult = $this->filter->filter($findfile);
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if ($filterresult >= FILTER_DISPLAY)
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{
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$findfile->filterstate = $filterresult;
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$this->elements[] = $findfile;
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}
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}
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//Sort the elements
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if ($this->sort)
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{
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usort($this->elements, $this->sortfunc);
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}
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}
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public function __construct($iterator, &$filter, $follow, $url, $needmime,
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$sort, $sortfunc)
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{
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$this->filter = $filter;
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$this->iterator = $iterator;
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if ($this->iterator->valid())
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{
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$this->base = $this->iterator->getPath();
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}
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$this->follow = $follow;
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$this->sortfunc = $sortfunc;
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$this->sort = $sort;
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$this->url = $url;
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$this->needmime = $needmime;
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//Get the element array. As this array only contains the current directory,
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//and subdirectories are first loaded when they are accessed, a lot of memory
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//is saved.
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$this->fillelemarray();
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}
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public function valid()
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{
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return $this->index < count($this->elements);
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}
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public function next()
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{
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$this->index++;
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}
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public function current()
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{
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return $this->elements[$this->index];
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}
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public function key()
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{
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return $this->elements[$this->index]['name'];
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}
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public function hasChildren()
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{
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$props = &$this->elements[$this->index]->get_props();
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//Only follow symlinks if we were ought to do so
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if ($props['isdir'] && !$props['isdot'] && (!$props['islink'] || $this->follow))
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{
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//Check whether the link points on a file
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if ($props['islink'])
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{
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$info = new SplFileInfo($props['linktarget']);
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//Only follow the symlink if the symlink points to a directory.
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//TODO: Recursion prevention?
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return ($info->isDir());
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}
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else
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{
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return true;
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}
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}
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return false;
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}
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public function getChildren()
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{
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$it = new RecursiveDirectoryIterator($this->elements[$this->index]->translate_path());
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return new egw_recursive_directory_iterator_wrapper($it, $this->filter,
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$this->follow, $this->url, $this->needmime, $this->sort,
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$this->sortfunc, false);
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}
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public function rewind()
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{
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$this->index = 0;
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}
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}
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class egw_find_iterator implements Iterator
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{
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private $filter = null;
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private $follow = false;
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private $iterator_stack = array();
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private $base = array();
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private $base_index = 0;
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private $current_cache = null;
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private $needs_next = false;
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private $rewind = false;
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private $pairs = false;
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private $numerical_sort = false;
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private $dirsontop = true;
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private $sort = 1;
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private $order = null;
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private $index = 0;
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private $lower_limit = 0;
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private $upper_limit = null;
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private $mindepth = null;
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private $maxdepth = null;
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private $depth = false;
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private $url = false;
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private $needmime = false;
|
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private function push_root_iterator()
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{
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$root_iterator = new egw_recursive_directory_iterator_wrapper(
|
||||
new RecursiveDirectoryIterator($this->base[$this->base_index]),
|
||||
$this->filter, $this->follow, $this->url, $this->needmime,
|
||||
($this->order !== null) || $this->dirsontop, array($this, "sort"), true);
|
||||
array_push($this->iterator_stack, $root_iterator);
|
||||
}
|
||||
|
||||
public function sort($a, $b)
|
||||
{
|
||||
//TODO restore, make it much faster :-)
|
||||
|
||||
/*if ($this->dirsontop)
|
||||
{
|
||||
if (($a['isdir'] != $b['isdir']) && ($a['isdir'] || $b['isdir']))
|
||||
return $a['isdir'] ? -1:1;
|
||||
}
|
||||
|
||||
if ($this->numerical_sort)
|
||||
{
|
||||
$res = $a[$this->order] == $b[$this->order] ? 0 : ($a[$this->order] > $b[$this->order] ? -1:1);
|
||||
}
|
||||
else
|
||||
{
|
||||
$res = strcasecmp($a[$this->order], $b[$this->order]);
|
||||
}
|
||||
|
||||
//Always use name as second sort criteria
|
||||
if (($res == 0) && ($this->order != 'name'))
|
||||
{
|
||||
$res = strcasecmp($a['name'], $b['name']);
|
||||
}*/
|
||||
|
||||
return 0; //$res * $this->sort;
|
||||
}
|
||||
|
||||
private function cur_iterator()
|
||||
{
|
||||
$s = count($this->iterator_stack);
|
||||
if ($s > 0)
|
||||
{
|
||||
return $this->iterator_stack[$s - 1];
|
||||
}
|
||||
else
|
||||
{
|
||||
return null;
|
||||
}
|
||||
}
|
||||
|
||||
private function output_directory(&$findfile)
|
||||
{
|
||||
//If the element is visible, set $current_cache properly and return
|
||||
if ($findfile->filterstate >= FILTER_OK)
|
||||
{
|
||||
$this->index++;
|
||||
if (($this->index-1 >= $this->lower_limit) &&
|
||||
(($this->mindepth === null) || count($this->iterator_stack) >= $this->mindepth))
|
||||
{
|
||||
$this->current_cache = $findfile->get_result($this->pairs);
|
||||
return true;
|
||||
}
|
||||
}
|
||||
return false;
|
||||
}
|
||||
|
||||
private function prefetch_current()
|
||||
{
|
||||
//If needs_next is true, a new element has been requested by calling the
|
||||
//"next()" function
|
||||
if ($this->needs_next)
|
||||
{
|
||||
//Reset $current_cache
|
||||
$this->needs_next = false;
|
||||
$this->current_cache = null;
|
||||
$this->rewind = false;
|
||||
|
||||
$cur = $this->cur_iterator();
|
||||
while (($cur != null) && (!$this->upper_limit || ($this->index <= $this->upper_limit)))
|
||||
{
|
||||
$skip = false;
|
||||
if ($cur->valid())
|
||||
{
|
||||
//Get a copy of the current file state
|
||||
$findfile = $cur->current();
|
||||
|
||||
//Add the children elements, if some exist
|
||||
if ($cur->hasChildren() && !($findfile->filterstate == FILTER_NOFOLLOW))
|
||||
{
|
||||
if (($this->maxdepth === null) || count($this->iterator_stack) < $this->maxdepth)
|
||||
{
|
||||
array_push($this->iterator_stack, $cur->getChildren());
|
||||
$skip = $this->depth;
|
||||
}
|
||||
}
|
||||
|
||||
//Step the current element one further and get the (probably) new iterator
|
||||
if (!$skip)
|
||||
$cur->next();
|
||||
$cur = $this->cur_iterator();
|
||||
|
||||
if (!$skip && $this->output_directory($findfile))
|
||||
break;
|
||||
}
|
||||
|
||||
//If the current iterator doesn't contain any valid element, we're at the
|
||||
//end of the current directory. Switch to the last directory
|
||||
if (!$cur->valid())
|
||||
{
|
||||
array_pop($this->iterator_stack);
|
||||
$cur = $this->cur_iterator();
|
||||
//If cur = null we're at the end of the current directory tree.
|
||||
//Check whether there was another directory specified
|
||||
if ($cur === null)
|
||||
{
|
||||
//Increment the base dir array index
|
||||
$this->base_index++;
|
||||
if ($this->base_index < count($this->base))
|
||||
{
|
||||
$this->push_root_iterator();
|
||||
$cur = $this->cur_iterator();
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
//If the contents of the directory were listed before the directory itself
|
||||
//output the directory name when it was popped from the iterator stack
|
||||
if ($this->depth && $cur && $cur->valid())
|
||||
{
|
||||
$findfile = $cur->current();
|
||||
$cur->next();
|
||||
if ($this->output_directory($findfile))
|
||||
break;
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
private function parseoptions(&$options)
|
||||
{
|
||||
//If options is not set, make it an empty array
|
||||
if (!$options)
|
||||
$options = array();
|
||||
|
||||
//Create the filter object (passed to other objects by reference) and
|
||||
//parse some other options relevant for this base class
|
||||
$this->filter = new egw_directory_iterator_filter($options);
|
||||
$this->follow = isset($options['follow']) ? $options['follow'] : false;
|
||||
$this->mindepth = isset($options['mindepth']) ? $options['mindepth'] : null;
|
||||
$this->maxdepth = isset($options['maxdepth']) ? $options['maxdepth'] : null;
|
||||
$this->depth = isset($options['depth']) ? $options['depth'] : false;
|
||||
$this->dirsontop = isset($options['dirsontop']) ? (boolean)$options['dirsontop'] :
|
||||
(isset($options['maxdepth']) && $options['maxdepth']>0);
|
||||
$this->sort = isset($options['sort']) ? (($options['sort'] == 'ASC') ? 1 : -1) : 1;
|
||||
$this->order = isset($options['order']) ? $options['order'] : null;
|
||||
|
||||
$this->numerical_sort = ($this->order == 'size' || $this->order == 'uid' ||
|
||||
$this->order == 'gid' || $this->order == 'mode' || $this->order == 'ctime' ||
|
||||
$this->order == 'mtime');
|
||||
|
||||
$this->url = isset($options['url']) ? (boolean)$options['url'] : false;
|
||||
|
||||
$this->needmime = isset($options['need_mime']) ? $options['need_mime'] : false;
|
||||
$this->needmime = $this->needmime || isset($options['mime']) || ($this->order == 'mime');
|
||||
|
||||
//Retrieve the limit parameters
|
||||
if (isset($options['limit']))
|
||||
{
|
||||
$args = explode(',', $options['limit']);
|
||||
$count = $args[0];
|
||||
if (isset($args[1]))
|
||||
{
|
||||
$this->lower_limit = $args[1];
|
||||
}
|
||||
$this->upper_limit = $this->lower_limit + $count;
|
||||
}
|
||||
}
|
||||
|
||||
public function __construct($base, $options=null, $pairs = false)
|
||||
{
|
||||
//_debug_array($options);
|
||||
$this->pairs = $pairs;
|
||||
|
||||
$this->parseoptions($options);
|
||||
|
||||
//Make sure that base is an array with numeric keys
|
||||
if (is_array($base))
|
||||
{
|
||||
$this->base = array_values($base);
|
||||
}
|
||||
else
|
||||
{
|
||||
$this->base[] = $base;
|
||||
}
|
||||
|
||||
//Add the default url prefix to every path if url is not set.
|
||||
foreach($this->base as $key => $path)
|
||||
$this->base[$key] = translate_path($path, $this->url);
|
||||
|
||||
$this->rewind();
|
||||
}
|
||||
|
||||
public function current()
|
||||
{
|
||||
$this->prefetch_current();
|
||||
return $this->current_cache;
|
||||
}
|
||||
|
||||
public function key()
|
||||
{
|
||||
$this->prefetch_current();
|
||||
if ($this->pairs)
|
||||
{
|
||||
return $this->current_cache->path;
|
||||
}
|
||||
else
|
||||
{
|
||||
return $this->index - 1 - $this->lower_limit;
|
||||
}
|
||||
}
|
||||
|
||||
public function next()
|
||||
{
|
||||
$this->needs_next = true;
|
||||
$this->prefetch_current();
|
||||
}
|
||||
|
||||
public function valid()
|
||||
{
|
||||
if (!$this->upper_limit || ($this->index <= $this->upper_limit))
|
||||
{
|
||||
$this->prefetch_current();
|
||||
return $this->current_cache != null;
|
||||
}
|
||||
else
|
||||
{
|
||||
return false;
|
||||
}
|
||||
}
|
||||
|
||||
public function rewind()
|
||||
{
|
||||
if (!$this->rewind)
|
||||
{
|
||||
//Empty the iterator stack
|
||||
$this->iterator_stack = array();
|
||||
$this->current_cache = null;
|
||||
$this->needs_next = true;
|
||||
$this->index = 0;
|
||||
$this->base_index = 0;
|
||||
$this->rewind = true;
|
||||
|
||||
//Create the root directory iterator
|
||||
$this->push_root_iterator();
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue
Block a user