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<?php
/**
* Class which performs the actual renaming of users
*/
class RenameuserSQL {
/**
* The old username
*
* @var string
* @access private
*/
var $old;
/**
* The new username
*
* @var string
* @access private
*/
var $new;
/**
* The user ID
*
* @var integer
* @access private
*/
var $uid;
/**
* The the tables => fields to be updated
*
* @var array
* @access private
*/
var $tables;
/**
* Flag that can be set to false, in case another process has already started
* the updates and the old username may have already been renamed in the user table.
*
* @var bool
* @access private
*/
var $checkIfUserExists;
/**
* Constructor
*
* @param $old string The old username
* @param $new string The new username
* @param $uid
* @param $options Array of options
* 'checkIfUserExists' - bool, whether to update the user table
*/
function __construct( $old, $new, $uid, $options = array() ) {
$this->old = $old;
$this->new = $new;
$this->uid = $uid;
$this->checkIfUserExists = true;
if ( isset ( $options['checkIfUserExists'] ) ) {
$this->checkIfUserExists = $options['checkIfUserExists'];
}
$this->tables = array(); // Immediate updates
$this->tables['image'] = array( 'img_user_text', 'img_user' );
$this->tables['oldimage'] = array( 'oi_user_text', 'oi_user' );
$this->tables['filearchive'] = array('fa_user_text','fa_user');
$this->tablesJob = array(); // Slow updates
// If this user has a large number of edits, use the jobqueue
if ( User::newFromId( $uid )->getEditCount() > RENAMEUSER_CONTRIBJOB ) {
$this->tablesJob['revision'] = array( 'rev_user_text', 'rev_user', 'rev_timestamp' );
$this->tablesJob['archive'] = array( 'ar_user_text', 'ar_user', 'ar_timestamp' );
$this->tablesJob['logging'] = array( 'log_user_text', 'log_user', 'log_timestamp' );
} else {
$this->tables['revision'] = array( 'rev_user_text', 'rev_user' );
$this->tables['archive'] = array( 'ar_user_text', 'ar_user' );
$this->tables['logging'] = array( 'log_user_text', 'log_user' );
}
// Recent changes is pretty hot, deadlocks occur if done all at once
if ( wfQueriesMustScale() ) {
$this->tablesJob['recentchanges'] = array( 'rc_user_text', 'rc_user', 'rc_timestamp' );
} else {
$this->tables['recentchanges'] = array( 'rc_user_text', 'rc_user' );
}
wfRunHooks( 'RenameUserSQL', array( $this ) );
}
/**
* Do the rename operation
*/
function rename() {
global $wgMemc, $wgAuth, $wgUpdateRowsPerJob;
wfProfileIn( __METHOD__ );
$dbw = wfGetDB( DB_MASTER );
$dbw->begin();
wfRunHooks( 'RenameUserPreRename', array( $this->uid, $this->old, $this->new ) );
// Rename and touch the user before re-attributing edits,
// this avoids users still being logged in and making new edits while
// being renamed, which leaves edits at the old name.
$dbw->update( 'user',
array( 'user_name' => $this->new, 'user_touched' => $dbw->timestamp() ),
array( 'user_name' => $this->old, 'user_id' => $this->uid ),
__METHOD__
);
if ( !$dbw->affectedRows() && $this->checkIfUserExists ) {
$dbw->rollback();
return false;
}
// Reset token to break login with central auth systems.
// Again, avoids user being logged in with old name.
$user = User::newFromId( $this->uid );
$authUser = $wgAuth->getUserInstance( $user );
$authUser->resetAuthToken();
// Delete from memcached.
$wgMemc->delete( wfMemcKey( 'user', 'id', $this->uid ) );
// Update ipblock list if this user has a block in there.
$dbw->update( 'ipblocks',
array( 'ipb_address' => $this->new ),
array( 'ipb_user' => $this->uid, 'ipb_address' => $this->old ),
__METHOD__ );
// Update this users block/rights log. Ideally, the logs would be historical,
// but it is really annoying when users have "clean" block logs by virtue of
// being renamed, which makes admin tasks more of a pain...
$oldTitle = Title::makeTitle( NS_USER, $this->old );
$newTitle = Title::makeTitle( NS_USER, $this->new );
$dbw->update( 'logging',
array( 'log_title' => $newTitle->getDBkey() ),
array( 'log_type' => array( 'block', 'rights' ),
'log_namespace' => NS_USER,
'log_title' => $oldTitle->getDBkey() ),
__METHOD__ );
// Do immediate updates!
foreach ( $this->tables as $table => $fieldSet ) {
list( $nameCol, $userCol ) = $fieldSet;
$dbw->update( $table,
array( $nameCol => $this->new ),
array( $nameCol => $this->old, $userCol => $this->uid ),
__METHOD__
);
}
// Increase time limit (like CheckUser); this can take a while...
if ( $this->tablesJob ) {
wfSuppressWarnings();
set_time_limit( 120 );
wfRestoreWarnings();
}
$jobs = array(); // jobs for all tables
// Construct jobqueue updates...
// FIXME: if a bureaucrat renames a user in error, he/she
// must be careful to wait until the rename finishes before
// renaming back. This is due to the fact the the job "queue"
// is not really FIFO, so we might end up with a bunch of edits
// randomly mixed between the two new names. Some sort of rename
// lock might be in order...
foreach ( $this->tablesJob as $table => $params ) {
$userTextC = $params[0]; // some *_user_text column
$userIDC = $params[1]; // some *_user column
$timestampC = $params[2]; // some *_timestamp column
$res = $dbw->select( $table,
array( $timestampC ),
array( $userTextC => $this->old, $userIDC => $this->uid ),
__METHOD__,
array( 'ORDER BY' => "$timestampC ASC" )
);
$jobParams = array();
$jobParams['table'] = $table;
$jobParams['column'] = $userTextC;
$jobParams['uidColumn'] = $userIDC;
$jobParams['timestampColumn'] = $timestampC;
$jobParams['oldname'] = $this->old;
$jobParams['newname'] = $this->new;
$jobParams['userID'] = $this->uid;
// Timestamp column data for index optimizations
$jobParams['minTimestamp'] = '0';
$jobParams['maxTimestamp'] = '0';
$jobParams['count'] = 0;
// Insert jobs into queue!
while ( true ) {
$row = $dbw->fetchObject( $res );
if ( !$row ) {
# If there are any job rows left, add it to the queue as one job
if ( $jobParams['count'] > 0 ) {
$jobs[] = Job::factory( 'renameUser', $oldTitle, $jobParams );
}
break;
}
# Since the ORDER BY is ASC, set the min timestamp with first row
if ( $jobParams['count'] == 0 ) {
$jobParams['minTimestamp'] = $row->$timestampC;
}
# Keep updating the last timestamp, so it should be correct
# when the last item is added.
$jobParams['maxTimestamp'] = $row->$timestampC;
# Update row counter
$jobParams['count']++;
# Once a job has $wgUpdateRowsPerJob rows, add it to the queue
if ( $jobParams['count'] >= $wgUpdateRowsPerJob ) {
$jobs[] = Job::factory( 'renameUser', $oldTitle, $jobParams );
$jobParams['minTimestamp'] = '0';
$jobParams['maxTimestamp'] = '0';
$jobParams['count'] = 0;
}
}
$dbw->freeResult( $res );
}
if ( count( $jobs ) > 0 ) {
Job::safeBatchInsert( $jobs ); // don't commit yet
}
// Commit the transaction
$dbw->commit();
// Delete from memcached again to make sure
$wgMemc->delete( wfMemcKey( 'user', 'id', $this->uid ) );
// Clear caches and inform authentication plugins
$user = User::newFromId( $this->uid );
$wgAuth->updateExternalDB( $user );
wfRunHooks( 'RenameUserComplete', array( $this->uid, $this->old, $this->new ) );
wfProfileOut( __METHOD__ );
return true;
}
}