auth_plugin_authplain::deleteUsers() - Code Metrics - Inspection of "Merge branch 'remoteapiGetversions' of github.com:..." - splitbrain/dokuwiki - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Push — remoteapiGetversions ( b2f4ab...f28a57 )

by Gerrit

created 2016-05-18 22:23 UTC

auth_plugin_authplain::deleteUsers() D

↳ Parent: auth_plugin_authplain

Complexity

Conditions	9
Paths	25

Size

Total Lines	31
Code Lines	19

Duplication

Lines	0
Ratio	0 %

Importance

Changes	1
Bugs	0	Features	1

Metric	Value
c	1
b	0
f	1
dl	0
loc	31
rs	4.909
cc	9
eloc	19
nc	25
nop	1

<?php
// must be run within Dokuwiki
if(!defined('DOKU_INC')) die();

/**
 * Plaintext authentication backend
 *
 * @license    GPL 2 (http://www.gnu.org/licenses/gpl.html)
 * @author     Andreas Gohr <[email protected]>
 * @author     Chris Smith <[email protected]>
 * @author     Jan Schumann <[email protected]>
 */
class auth_plugin_authplain extends DokuWiki_Auth_Plugin {
    /** @var array user cache */
    protected $users = null;

    /** @var array filter pattern */
    protected $_pattern = array();

    /** @var bool safe version of preg_split */
    protected $_pregsplit_safe = false;

    /**
     * Constructor
     *
     * Carry out sanity checks to ensure the object is
     * able to operate. Set capabilities.
     *
     * @author  Christopher Smith <[email protected]>
     */
    public function __construct() {
        parent::__construct();
        global $config_cascade;

        if(!@is_readable($config_cascade['plainauth.users']['default'])) {
            $this->success = false;
        } else {
            if(@is_writable($config_cascade['plainauth.users']['default'])) {
                $this->cando['addUser']   = true;
                $this->cando['delUser']   = true;
                $this->cando['modLogin']  = true;
                $this->cando['modPass']   = true;
                $this->cando['modName']   = true;
                $this->cando['modMail']   = true;
                $this->cando['modGroups'] = true;
            }
            $this->cando['getUsers']     = true;
            $this->cando['getUserCount'] = true;
        }

        $this->_pregsplit_safe = version_compare(PCRE_VERSION,'6.7','>=');
    }

    /**
     * Check user+password
     *
     * Checks if the given user exists and the given
     * plaintext password is correct
     *
     * @author  Andreas Gohr <[email protected]>
     * @param string $user
     * @param string $pass
     * @return  bool
     */
    public function checkPass($user, $pass) {
        $userinfo = $this->getUserData($user);
        if($userinfo === false) return false;

        return auth_verifyPassword($pass, $this->users[$user]['pass']);
    }

    /**
     * Return user info
     *
     * Returns info about the given user needs to contain
     * at least these fields:
     *
     * name string  full name of the user
     * mail string  email addres of the user
     * grps array   list of groups the user is in
     *
     * @author  Andreas Gohr <[email protected]>
     * @param string $user
     * @param bool $requireGroups  (optional) ignored by this plugin, grps info always supplied
     * @return array|false
     */
    public function getUserData($user, $requireGroups=true) {
        if($this->users === null) $this->_loadUserData();
        return isset($this->users[$user]) ? $this->users[$user] : false;
    }

    /**
     * Creates a string suitable for saving as a line
     * in the file database
     * (delimiters escaped, etc.)
     *
     * @param string $user
     * @param string $pass
     * @param string $name
     * @param string $mail
     * @param array  $grps list of groups the user is in
     * @return string
     */
    protected function _createUserLine($user, $pass, $name, $mail, $grps) {
        $groups   = join(',', $grps);
        $userline = array($user, $pass, $name, $mail, $groups);
        $userline = str_replace('\\', '\\\\', $userline); // escape \ as \\
        $userline = str_replace(':', '\\:', $userline); // escape : as \:
        $userline = join(':', $userline)."\n";
        return $userline;
    }

    /**
     * Create a new User
     *
     * Returns false if the user already exists, null when an error
     * occurred and true if everything went well.
     *
     * The new user will be added to the default group by this
     * function if grps are not specified (default behaviour).
     *
     * @author  Andreas Gohr <[email protected]>
     * @author  Chris Smith <[email protected]>
     *
     * @param string $user
     * @param string $pwd
     * @param string $name
     * @param string $mail
     * @param array  $grps
     * @return bool|null|string
     */
    public function createUser($user, $pwd, $name, $mail, $grps = null) {
        global $conf;
        global $config_cascade;

        // user mustn't already exist
        if($this->getUserData($user) !== false) {
            msg($this->getLang('userexists'), -1);
            return false;
        }

        $pass = auth_cryptPassword($pwd);

        // set default group if no groups specified
        if(!is_array($grps)) $grps = array($conf['defaultgroup']);

        // prepare user line
        $userline = $this->_createUserLine($user, $pass, $name, $mail, $grps);

        if(!io_saveFile($config_cascade['plainauth.users']['default'], $userline, true)) {
            msg($this->getLang('writefail'), -1);
            return null;
        }

        $this->users[$user] = compact('pass', 'name', 'mail', 'grps');
        return $pwd;
class Author {
    private $name;

    public function __construct($name) {
        $this->name = $name;
    }

    public function getName() {
        return $this->name;
    }
}

abstract class Post {
    public function getAuthor() {
        return 'Johannes';
    }
}

class BlogPost extends Post {
    public function getAuthor() {
        return new Author('Johannes');
    }
}

class ForumPost extends Post { /* ... */ }

function my_function(Post $post) {
    echo strtoupper($post->getAuthor());
}
    }

    /**
     * Modify user data
     *
     * @author  Chris Smith <[email protected]>
     * @param   string $user      nick of the user to be changed
     * @param   array  $changes   array of field/value pairs to be changed (password will be clear text)
     * @return  bool
     */
    public function modifyUser($user, $changes) {
        global $ACT;
        global $config_cascade;

        // sanity checks, user must already exist and there must be something to change
        if(($userinfo = $this->getUserData($user)) === false) {
            msg($this->getLang('usernotexists'), -1);
            return false;
        }

        // don't modify protected users
        if(!empty($userinfo['protected'])) {
            msg(sprintf($this->getLang('protected'), hsc($user)), -1);
            return false;
        }

        if(!is_array($changes) || !count($changes)) return true;

        // update userinfo with new data, remembering to encrypt any password
        $newuser = $user;
        foreach($changes as $field => $value) {
            if($field == 'user') {
                $newuser = $value;
                continue;
            }
            if($field == 'pass') $value = auth_cryptPassword($value);
            $userinfo[$field] = $value;
        }

        $userline = $this->_createUserLine($newuser, $userinfo['pass'], $userinfo['name'], $userinfo['mail'], $userinfo['grps']);

        if(!io_replaceInFile($config_cascade['plainauth.users']['default'], '/^'.$user.':/', $userline, true)) {
            msg('There was an error modifying your user data. You may need to register again.', -1);
            // FIXME, io functions should be fail-safe so existing data isn't lost
            $ACT = 'register';
            return false;
        }

        $this->users[$newuser] = $userinfo;
        return true;
    }

    /**
     * Remove one or more users from the list of registered users
     *
     * @author  Christopher Smith <[email protected]>
     * @param   array  $users   array of users to be deleted
     * @return  int             the number of users deleted
     */
    public function deleteUsers($users) {
        global $config_cascade;

        if(!is_array($users) || empty($users)) return 0;

        if($this->users === null) $this->_loadUserData();

        $deleted = array();
        foreach($users as $user) {
            // don't delete protected users
            if(!empty($this->users[$user]['protected'])) {
                msg(sprintf($this->getLang('protected'), hsc($user)), -1);
                continue;
            }
            if(isset($this->users[$user])) $deleted[] = preg_quote($user, '/');
        }

        if(empty($deleted)) return 0;

        $pattern = '/^('.join('|', $deleted).'):/';
        if (!io_deleteFromFile($config_cascade['plainauth.users']['default'], $pattern, true)) {
            msg($this->getLang('writefail'), -1);
            return 0;
        }

        // reload the user list and count the difference
        $count = count($this->users);
        $this->_loadUserData();
        $count -= count($this->users);
        return $count;
    }

    /**
     * Return a count of the number of user which meet $filter criteria
     *
     * @author  Chris Smith <[email protected]>
     *
     * @param array $filter
     * @return int
     */
    public function getUserCount($filter = array()) {

        if($this->users === null) $this->_loadUserData();

        if(!count($filter)) return count($this->users);

        $count = 0;
        $this->_constructPattern($filter);

        foreach($this->users as $user => $info) {
            $count += $this->_filter($user, $info);
        }

        return $count;
    }

    /**
     * Bulk retrieval of user data
     *
     * @author  Chris Smith <[email protected]>
     *
     * @param   int   $start index of first user to be returned
     * @param   int   $limit max number of users to be returned
     * @param   array $filter array of field/pattern pairs
     * @return  array userinfo (refer getUserData for internal userinfo details)
     */
    public function retrieveUsers($start = 0, $limit = 0, $filter = array()) {

        if($this->users === null) $this->_loadUserData();

        ksort($this->users);

        $i     = 0;
        $count = 0;
        $out   = array();
        $this->_constructPattern($filter);

        foreach($this->users as $user => $info) {
            if($this->_filter($user, $info)) {
                if($i >= $start) {
                    $out[$user] = $info;
                    $count++;
                    if(($limit > 0) && ($count >= $limit)) break;
                }
                $i++;
            }
        }

        return $out;
    }

    /**
     * Only valid pageid's (no namespaces) for usernames
     *
     * @param string $user
     * @return string
     */
    public function cleanUser($user) {
        global $conf;
        return cleanID(str_replace(':', $conf['sepchar'], $user));
    }

    /**
     * Only valid pageid's (no namespaces) for groupnames
     *
     * @param string $group
     * @return string
     */
    public function cleanGroup($group) {
        global $conf;
        return cleanID(str_replace(':', $conf['sepchar'], $group));
    }

    /**
     * Load all user data
     *
     * loads the user file into a datastructure
     *
     * @author  Andreas Gohr <[email protected]>
     */
    protected function _loadUserData() {
        global $config_cascade;

        $this->users = $this->_readUserFile($config_cascade['plainauth.users']['default']);

        // support protected users
        if(!empty($config_cascade['plainauth.users']['protected'])) {
            $protected = $this->_readUserFile($config_cascade['plainauth.users']['protected']);
            foreach(array_keys($protected) as $key) {
                $protected[$key]['protected'] = true;
            }
            $this->users = array_merge($this->users, $protected);
        }
    }

    /**
     * Read user data from given file
     *
     * ignores non existing files
     *
     * @param string $file the file to load data from
     * @return array
     */
    protected function _readUserFile($file) {
        $users = array();
        if(!file_exists($file)) return $users;

        $lines = file($file);
        foreach($lines as $line) {
            $line = preg_replace('/#.*$/', '', $line); //ignore comments
            $line = trim($line);
            if(empty($line)) continue;

            /* NB: preg_split can be deprecated/replaced with str_getcsv once dokuwiki is min php 5.3 */
            $row = $this->_splitUserData($line);
            $row = str_replace('\\:', ':', $row);
            $row = str_replace('\\\\', '\\', $row);

            $groups = array_values(array_filter(explode(",", $row[4])));

            $users[$row[0]]['pass'] = $row[1];
            $users[$row[0]]['name'] = urldecode($row[2]);
            $users[$row[0]]['mail'] = $row[3];
            $users[$row[0]]['grps'] = $groups;
        }
        return $users;
    }

    protected function _splitUserData($line){
        // due to a bug in PCRE 6.6, preg_split will fail with the regex we use here
        // refer github issues 877 & 885
        if ($this->_pregsplit_safe){
            return preg_split('/(?<![^\\\\]\\\\)\:/', $line, 5);       // allow for : escaped as \:
        }

        $row = array();
        $piece = '';
        $len = strlen($line);
        for($i=0; $i<$len; $i++){
            if ($line[$i]=='\\'){
                $piece .= $line[$i];
                $i++;
                if ($i>=$len) break;
            } else if ($line[$i]==':'){
                $row[] = $piece;
                $piece = '';
                continue;
            }
            $piece .= $line[$i];
        }
        $row[] = $piece;

        return $row;
    }

    /**
     * return true if $user + $info match $filter criteria, false otherwise
     *
     * @author   Chris Smith <[email protected]>
     *
     * @param string $user User login
     * @param array  $info User's userinfo array
     * @return bool
     */
    protected function _filter($user, $info) {
        foreach($this->_pattern as $item => $pattern) {
            if($item == 'user') {
                if(!preg_match($pattern, $user)) return false;
            } else if($item == 'grps') {
                if(!count(preg_grep($pattern, $info['grps']))) return false;
            } else {
                if(!preg_match($pattern, $info[$item])) return false;
            }
        }
        return true;
    }

    /**
     * construct a filter pattern
     *
     * @param array $filter
     */
    protected function _constructPattern($filter) {
        $this->_pattern = array();
        foreach($filter as $item => $pattern) {
            $this->_pattern[$item] = '/'.str_replace('/', '\/', $pattern).'/i'; // allow regex characters
        }
    }
}


1			<?php
2			// must be run within Dokuwiki
3			if(!defined('DOKU_INC')) die();
4
5			/**
6			* Plaintext authentication backend
7			*
8			* @license GPL 2 (http://www.gnu.org/licenses/gpl.html)
9			* @author Andreas Gohr <[email protected]>
10			* @author Chris Smith <[email protected]>
11			* @author Jan Schumann <[email protected]>
12			*/
13			class auth_plugin_authplain extends DokuWiki_Auth_Plugin {
14			/** @var array user cache */
15			protected $users = null;
16
17			/** @var array filter pattern */
18			protected $_pattern = array();
19
20			/** @var bool safe version of preg_split */
21			protected $_pregsplit_safe = false;
22
23			/**
24			* Constructor
25			*
26			* Carry out sanity checks to ensure the object is
27			* able to operate. Set capabilities.
28			*
29			* @author Christopher Smith <[email protected]>
30			*/
31			public function __construct() {
32			parent::__construct();
33			global $config_cascade;
34
35			if(!@is_readable($config_cascade['plainauth.users']['default'])) {
36			$this->success = false;
37			} else {
38			if(@is_writable($config_cascade['plainauth.users']['default'])) {
39			$this->cando['addUser'] = true;
40			$this->cando['delUser'] = true;
41			$this->cando['modLogin'] = true;
42			$this->cando['modPass'] = true;
43			$this->cando['modName'] = true;
44			$this->cando['modMail'] = true;
45			$this->cando['modGroups'] = true;
46			}
47			$this->cando['getUsers'] = true;
48			$this->cando['getUserCount'] = true;
49			}
50
51			$this->_pregsplit_safe = version_compare(PCRE_VERSION,'6.7','>=');
52			}
53
54			/**
55			* Check user+password
56			*
57			* Checks if the given user exists and the given
58			* plaintext password is correct
59			*
60			* @author Andreas Gohr <[email protected]>
61			* @param string $user
62			* @param string $pass
63			* @return bool
64			*/
65			public function checkPass($user, $pass) {
66			$userinfo = $this->getUserData($user);
67			if($userinfo === false) return false;
68
69			return auth_verifyPassword($pass, $this->users[$user]['pass']);
70			}
71
72			/**
73			* Return user info
74			*
75			* Returns info about the given user needs to contain
76			* at least these fields:
77			*
78			* name string full name of the user
79			* mail string email addres of the user
80			* grps array list of groups the user is in
81			*
82			* @author Andreas Gohr <[email protected]>
83			* @param string $user
84			* @param bool $requireGroups (optional) ignored by this plugin, grps info always supplied
85			* @return array\|false
86			*/
87			public function getUserData($user, $requireGroups=true) {
88			if($this->users === null) $this->_loadUserData();
89			return isset($this->users[$user]) ? $this->users[$user] : false;
90			}
91
92			/**
93			* Creates a string suitable for saving as a line
94			* in the file database
95			* (delimiters escaped, etc.)
96			*
97			* @param string $user
98			* @param string $pass
99			* @param string $name
100			* @param string $mail
101			* @param array $grps list of groups the user is in
102			* @return string
103			*/
104			protected function _createUserLine($user, $pass, $name, $mail, $grps) {
105			$groups = join(',', $grps);
106			$userline = array($user, $pass, $name, $mail, $groups);
107			$userline = str_replace('\\', '\\\\', $userline); // escape \ as \\
108			$userline = str_replace(':', '\\:', $userline); // escape : as \:
109			$userline = join(':', $userline)."\n";
110			return $userline;
111			}
112
113			/**
114			* Create a new User
115			*
116			* Returns false if the user already exists, null when an error
117			* occurred and true if everything went well.
118			*
119			* The new user will be added to the default group by this
120			* function if grps are not specified (default behaviour).
121			*
122			* @author Andreas Gohr <[email protected]>
123			* @author Chris Smith <[email protected]>
124			*
125			* @param string $user
126			* @param string $pwd
127			* @param string $name
128			* @param string $mail
129			* @param array $grps
130			* @return bool\|null\|string
131			*/
132			public function createUser($user, $pwd, $name, $mail, $grps = null) {
133			global $conf;
134			global $config_cascade;
135
136			// user mustn't already exist
137			if($this->getUserData($user) !== false) {
138			msg($this->getLang('userexists'), -1);
139			return false;
140			}
141
142			$pass = auth_cryptPassword($pwd);
143
144			// set default group if no groups specified
145			if(!is_array($grps)) $grps = array($conf['defaultgroup']);
146
147			// prepare user line
148			$userline = $this->_createUserLine($user, $pass, $name, $mail, $grps);
149
150			if(!io_saveFile($config_cascade['plainauth.users']['default'], $userline, true)) {
151			msg($this->getLang('writefail'), -1);
152			return null;
153			}
154
155			$this->users[$user] = compact('pass', 'name', 'mail', 'grps');
156			return $pwd;
			0 ignored issues – show Bug Best Practice introduced 2015-11-25 07:06 UTC by Report Bug Copy Issue Report The return type of `return $pwd;` (`string`) is incompatible with the return type of the parent method `DokuWiki_Auth_Plugin::createUser` of type `boolean\|null`. If you return a value from a function or method, it should be a sub-type of the type that is given by the parent type f.e. an interface, or abstract method. This is more formally defined by the Lizkov substitution principle, and guarantees that classes that depend on the parent type can use any instance of a child type interchangably. This principle also belongs to the SOLID principles for object oriented design. Let’s take a look at an example: class Author { private $name; public function __construct($name) { $this->name = $name; } public function getName() { return $this->name; } } abstract class Post { public function getAuthor() { return 'Johannes'; } } class BlogPost extends Post { public function getAuthor() { return new Author('Johannes'); } } class ForumPost extends Post { /* ... */ } function my_function(Post $post) { echo strtoupper($post->getAuthor()); } Our function `my_function` expects a `Post` object, and outputs the author of the post. The base class `Post` returns a simple string and outputting a simple string will work just fine. However, the child class `BlogPost` which is a sub-type of `Post` instead decided to return an `object`, and is therefore violating the SOLID principles. If a `BlogPost` were passed to `my_function`, PHP would not complain, but ultimately fail when executing the `strtoupper` call in its body. Loading history...
157			}
158
159			/**
160			* Modify user data
161			*
162			* @author Chris Smith <[email protected]>
163			* @param string $user nick of the user to be changed
164			* @param array $changes array of field/value pairs to be changed (password will be clear text)
165			* @return bool
166			*/
167			public function modifyUser($user, $changes) {
168			global $ACT;
169			global $config_cascade;
170
171			// sanity checks, user must already exist and there must be something to change
172			if(($userinfo = $this->getUserData($user)) === false) {
173			msg($this->getLang('usernotexists'), -1);
174			return false;
175			}
176
177			// don't modify protected users
178			if(!empty($userinfo['protected'])) {
179			msg(sprintf($this->getLang('protected'), hsc($user)), -1);
180			return false;
181			}
182
183			if(!is_array($changes) \|\| !count($changes)) return true;
184
185			// update userinfo with new data, remembering to encrypt any password
186			$newuser = $user;
187			foreach($changes as $field => $value) {
188			if($field == 'user') {
189			$newuser = $value;
190			continue;
191			}
192			if($field == 'pass') $value = auth_cryptPassword($value);
193			$userinfo[$field] = $value;
194			}
195
196			$userline = $this->_createUserLine($newuser, $userinfo['pass'], $userinfo['name'], $userinfo['mail'], $userinfo['grps']);
197
198			if(!io_replaceInFile($config_cascade['plainauth.users']['default'], '/^'.$user.':/', $userline, true)) {
199			msg('There was an error modifying your user data. You may need to register again.', -1);
200			// FIXME, io functions should be fail-safe so existing data isn't lost
201			$ACT = 'register';
202			return false;
203			}
204
205			$this->users[$newuser] = $userinfo;
206			return true;
207			}
208
209			/**
210			* Remove one or more users from the list of registered users
211			*
212			* @author Christopher Smith <[email protected]>
213			* @param array $users array of users to be deleted
214			* @return int the number of users deleted
215			*/
216			public function deleteUsers($users) {
217			global $config_cascade;
218
219			if(!is_array($users) \|\| empty($users)) return 0;
220
221			if($this->users === null) $this->_loadUserData();
222
223			$deleted = array();
224			foreach($users as $user) {
225			// don't delete protected users
226			if(!empty($this->users[$user]['protected'])) {
227			msg(sprintf($this->getLang('protected'), hsc($user)), -1);
228			continue;
229			}
230			if(isset($this->users[$user])) $deleted[] = preg_quote($user, '/');
231			}
232
233			if(empty($deleted)) return 0;
234
235			$pattern = '/^('.join('\|', $deleted).'):/';
236			if (!io_deleteFromFile($config_cascade['plainauth.users']['default'], $pattern, true)) {
237			msg($this->getLang('writefail'), -1);
238			return 0;
239			}
240
241			// reload the user list and count the difference
242			$count = count($this->users);
243			$this->_loadUserData();
244			$count -= count($this->users);
245			return $count;
246			}
247
248			/**
249			* Return a count of the number of user which meet $filter criteria
250			*
251			* @author Chris Smith <[email protected]>
252			*
253			* @param array $filter
254			* @return int
255			*/
256			public function getUserCount($filter = array()) {
257
258			if($this->users === null) $this->_loadUserData();
259
260			if(!count($filter)) return count($this->users);
261
262			$count = 0;
263			$this->_constructPattern($filter);
264
265			foreach($this->users as $user => $info) {
266			$count += $this->_filter($user, $info);
267			}
268
269			return $count;
270			}
271
272			/**
273			* Bulk retrieval of user data
274			*
275			* @author Chris Smith <[email protected]>
276			*
277			* @param int $start index of first user to be returned
278			* @param int $limit max number of users to be returned
279			* @param array $filter array of field/pattern pairs
280			* @return array userinfo (refer getUserData for internal userinfo details)
281			*/
282			public function retrieveUsers($start = 0, $limit = 0, $filter = array()) {
283
284			if($this->users === null) $this->_loadUserData();
285
286			ksort($this->users);
287
288			$i = 0;
289			$count = 0;
290			$out = array();
291			$this->_constructPattern($filter);
292
293			foreach($this->users as $user => $info) {
294			if($this->_filter($user, $info)) {
295			if($i >= $start) {
296			$out[$user] = $info;
297			$count++;
298			if(($limit > 0) && ($count >= $limit)) break;
299			}
300			$i++;
301			}
302			}
303
304			return $out;
305			}
306
307			/**
308			* Only valid pageid's (no namespaces) for usernames
309			*
310			* @param string $user
311			* @return string
312			*/
313			public function cleanUser($user) {
314			global $conf;
315			return cleanID(str_replace(':', $conf['sepchar'], $user));
316			}
317
318			/**
319			* Only valid pageid's (no namespaces) for groupnames
320			*
321			* @param string $group
322			* @return string
323			*/
324			public function cleanGroup($group) {
325			global $conf;
326			return cleanID(str_replace(':', $conf['sepchar'], $group));
327			}
328
329			/**
330			* Load all user data
331			*
332			* loads the user file into a datastructure
333			*
334			* @author Andreas Gohr <[email protected]>
335			*/
336			protected function _loadUserData() {
337			global $config_cascade;
338
339			$this->users = $this->_readUserFile($config_cascade['plainauth.users']['default']);
340
341			// support protected users
342			if(!empty($config_cascade['plainauth.users']['protected'])) {
343			$protected = $this->_readUserFile($config_cascade['plainauth.users']['protected']);
344			foreach(array_keys($protected) as $key) {
345			$protected[$key]['protected'] = true;
346			}
347			$this->users = array_merge($this->users, $protected);
348			}
349			}
350
351			/**
352			* Read user data from given file
353			*
354			* ignores non existing files
355			*
356			* @param string $file the file to load data from
357			* @return array
358			*/
359			protected function _readUserFile($file) {
360			$users = array();
361			if(!file_exists($file)) return $users;
362
363			$lines = file($file);
364			foreach($lines as $line) {
365			$line = preg_replace('/#.*$/', '', $line); //ignore comments
366			$line = trim($line);
367			if(empty($line)) continue;
368
369			/* NB: preg_split can be deprecated/replaced with str_getcsv once dokuwiki is min php 5.3 */
370			$row = $this->_splitUserData($line);
371			$row = str_replace('\\:', ':', $row);
372			$row = str_replace('\\\\', '\\', $row);
373
374			$groups = array_values(array_filter(explode(",", $row[4])));
375
376			$users[$row[0]]['pass'] = $row[1];
377			$users[$row[0]]['name'] = urldecode($row[2]);
378			$users[$row[0]]['mail'] = $row[3];
379			$users[$row[0]]['grps'] = $groups;
380			}
381			return $users;
382			}
383
384			protected function _splitUserData($line){
385			// due to a bug in PCRE 6.6, preg_split will fail with the regex we use here
386			// refer github issues 877 & 885
387			if ($this->_pregsplit_safe){
388			return preg_split('/(?<![^\\\\]\\\\)\:/', $line, 5); // allow for : escaped as \:
389			}
390
391			$row = array();
392			$piece = '';
393			$len = strlen($line);
394			for($i=0; $i<$len; $i++){
395			if ($line[$i]=='\\'){
396			$piece .= $line[$i];
397			$i++;
398			if ($i>=$len) break;
399			} else if ($line[$i]==':'){
400			$row[] = $piece;
401			$piece = '';
402			continue;
403			}
404			$piece .= $line[$i];
405			}
406			$row[] = $piece;
407
408			return $row;
409			}
410
411			/**
412			* return true if $user + $info match $filter criteria, false otherwise
413			*
414			* @author Chris Smith <[email protected]>
415			*
416			* @param string $user User login
417			* @param array $info User's userinfo array
418			* @return bool
419			*/
420			protected function _filter($user, $info) {
421			foreach($this->_pattern as $item => $pattern) {
422			if($item == 'user') {
423			if(!preg_match($pattern, $user)) return false;
424			} else if($item == 'grps') {
425			if(!count(preg_grep($pattern, $info['grps']))) return false;
426			} else {
427			if(!preg_match($pattern, $info[$item])) return false;
428			}
429			}
430			return true;
431			}
432
433			/**
434			* construct a filter pattern
435			*
436			* @param array $filter
437			*/
438			protected function _constructPattern($filter) {
439			$this->_pattern = array();
440			foreach($filter as $item => $pattern) {
441			$this->_pattern[$item] = '/'.str_replace('/', '\/', $pattern).'/i'; // allow regex characters
442			}
443			}
444			}
445

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