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<?php
/**
* Move user's data directories from using username to registration date
*/
/**
* Generates a file matrix like Elgg 1.0 did
*
* @param string $username Username of user
*
* @return string File matrix path
*/
function file_matrix_1_0($username) {
$matrix = "";
$len = strlen($username);
if ($len > 5) {
$len = 5;
}
for ($n = 0; $n < $len; $n++) {
if (ctype_alnum($username[$n])) {
$matrix .= $username[$n] . "/";
}
}
return $matrix . $username . "/";
}
/**
* Generate a file matrix like Elgg 1.1, 1.2 and 1.5
*
* @param string $filename The filename
*
* @return string
*/
function file_matrix_1_1($filename) {
$matrix = "";
$name = $filename;
$filename = mb_str_split($filename);
if (!$filename) {
return false;
}
$len = count($filename);
if ($len > 5) {
$len = 5;
}
for ($n = 0; $n < $len; $n++) {
$matrix .= $filename[$n] . "/";
}
return $matrix . $name . "/";
}
/**
* Handle splitting multibyte strings
*
* @param string $string String to split.
* @param string $charset Charset to use.
*
* @return array|false
*/
function mb_str_split($string, $charset = 'UTF8') {
if (is_callable('mb_substr')) {
$length = mb_strlen($string);
$array = array();
while ($length) {
$array[] = mb_substr($string, 0, 1, $charset);
$string = mb_substr($string, 1, $length, $charset);
$length = mb_strlen($string);
}
return $array;
} else {
return str_split($string);
}
return false;
}
/**
* 1.6 style file matrix
*
* @param string $filename The filename
*
* @return string
*/
function file_matrix_1_6($filename) {
$invalid_fs_chars = '*\'\\/"!$%^&*.%(){}[]#~?<>;|¬`@-+=';
$matrix = "";
$name = $filename;
$filename = mb_str_split($filename);
if (!$filename) {
return false;
}
$len = count($filename);
if ($len > 5) {
$len = 5;
}
for ($n = 0; $n < $len; $n++) {
// Prevent a matrix being formed with unsafe characters
$char = $filename[$n];
if (strpos($invalid_fs_chars, $char) !== false) {
$char = '_';
}
$matrix .= $char . "/";
}
return $matrix . $name . "/";
}
/**
* Scans a directory and moves any files from $from to $to
* preserving structure and handling existing paths.
* Will no overwrite files in $to.
*
* TRAILING SLASHES REQUIRED.
*
* @param string $from From dir.
* @param string $to To dir.
* @param bool $move True to move, false to copy.
* @param string $preference to|from If file collisions, which dir has preference.
*
* @return bool
*/
function merge_directories($from, $to, $move = false, $preference = 'to') {
if (!$entries = scandir($from)) {
return false;
}
// character filtering needs to be elsewhere.
if (!is_dir($to)) {
mkdir($to, 0700, true);
}
if ($move === true) {
$f = 'rename';
} else {
$f = 'copy';
}
foreach ($entries as $entry) {
if ($entry == '.' || $entry == '..') {
continue;
}
$from_path = $from . $entry;
$to_path = $to . $entry;
// check to see if the path exists and is a dir, if so, recurse.
if (is_dir($from_path) && is_dir($to_path)) {
$from_path .= '/';
$to_path .= '/';
merge_directories($from_path, $to_path, $move, $preference);
// since it's a dir that already exists we don't need to move it
continue;
}
// only move if target doesn't exist or if preference is for the from dir
if (!file_exists($to_path) || $preference == 'from') {
if ($f($from_path, $to_path)) {
//elgg_dump("Moved/Copied $from_path to $to_path");
}
} else {
//elgg_dump("Ignoring $from_path -> $to_path");
}
}
}
/**
* Create a 1.7 style user file matrix based upon date.
*
* @param int $guid Guid of owner
*
* @return string File matrix path
*/
function user_file_matrix($guid) {
// lookup the entity
$user = get_entity($guid);
if ($user->type != 'user') {
// only to be used for user directories
return FALSE;
}
$time_created = date('Y/m/d', $user->time_created);
return "$time_created/$user->guid/";
}
global $DB_QUERY_CACHE, $ENTITY_CACHE, $CONFIG;
/**
* Upgrade file locations
*/
$users = mysql_query("SELECT guid, username
FROM {$CONFIG->dbprefix}users_entity WHERE username != ''");
while ($user = mysql_fetch_object($users)) {
$DB_QUERY_CACHE = $ENTITY_CACHE = array();
$to = $CONFIG->dataroot . user_file_matrix($user->guid);
foreach (array('1_0', '1_1', '1_6') as $version) {
$function = "file_matrix_$version";
$from = $CONFIG->dataroot . $function($user->username);
merge_directories($from, $to, $move = TRUE, $preference = 'from');
}
}
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