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<?php
/**
* Rebuild recent changes from scratch. This takes several hours,
* depending on the database size and server configuration.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
* http://www.gnu.org/copyleft/gpl.html
*
* @file
* @ingroup Maintenance
* @todo Document
*/
require_once __DIR__ . '/Maintenance.php';
/**
* Maintenance script that rebuilds recent changes from scratch.
*
* @ingroup Maintenance
*/
class RebuildRecentchanges extends Maintenance {
/** @var integer UNIX timestamp */
private $cutoffFrom;
/** @var integer UNIX timestamp */
private $cutoffTo;
public function __construct() {
parent::__construct();
$this->addDescription( 'Rebuild recent changes' );
$this->addOption(
'from',
"Only rebuild rows in requested time range (in YYYYMMDDHHMMSS format)",
false,
true
);
$this->addOption(
'to',
"Only rebuild rows in requested time range (in YYYYMMDDHHMMSS format)",
false,
true
);
$this->setBatchSize( 200 );
}
public function execute() {
if (
( $this->hasOption( 'from' ) && !$this->hasOption( 'to' ) ) ||
( !$this->hasOption( 'from' ) && $this->hasOption( 'to' ) )
) {
$this->error( "Both 'from' and 'to' must be given, or neither", 1 );
}
$this->rebuildRecentChangesTablePass1();
$this->rebuildRecentChangesTablePass2();
$this->rebuildRecentChangesTablePass3();
$this->rebuildRecentChangesTablePass4();
$this->rebuildRecentChangesTablePass5();
if ( !( $this->hasOption( 'from' ) && $this->hasOption( 'to' ) ) ) {
$this->purgeFeeds();
}
$this->output( "Done.\n" );
}
/**
* Rebuild pass 1: Insert `recentchanges` entries for page revisions.
*/
private function rebuildRecentChangesTablePass1() {
$dbw = $this->getDB( DB_MASTER );
if ( $this->hasOption( 'from' ) && $this->hasOption( 'to' ) ) {
$this->cutoffFrom = wfTimestamp( TS_UNIX, $this->getOption( 'from' ) );
$this->cutoffTo = wfTimestamp( TS_UNIX, $this->getOption( 'to' ) );
$sec = $this->cutoffTo - $this->cutoffFrom;
$days = $sec / 24 / 3600;
$this->output( "Rebuilding range of $sec seconds ($days days)\n" );
} else {
global $wgRCMaxAge;
$days = $wgRCMaxAge / 24 / 3600;
$this->output( "Rebuilding \$wgRCMaxAge=$wgRCMaxAge seconds ($days days)\n" );
$this->cutoffFrom = time() - $wgRCMaxAge;
$this->cutoffTo = time();
}
$this->output( "Clearing recentchanges table for time range...\n" );
$rcids = $dbw->selectFieldValues(
'recentchanges',
'rc_id',
[
'rc_timestamp > ' . $dbw->addQuotes( $dbw->timestamp( $this->cutoffFrom ) ),
'rc_timestamp < ' . $dbw->addQuotes( $dbw->timestamp( $this->cutoffTo ) )
]
);
foreach ( array_chunk( $rcids, $this->mBatchSize ) as $rcidBatch ) {
$dbw->delete( 'recentchanges', [ 'rc_id' => $rcidBatch ], __METHOD__ );
wfGetLBFactory()->waitForReplication();
}
$this->output( "Loading from page and revision tables...\n" );
$res = $dbw->select(
[ 'page', 'revision' ],
[
'rev_timestamp',
'rev_user',
'rev_user_text',
'rev_comment',
'rev_minor_edit',
'rev_id',
'rev_deleted',
'page_namespace',
'page_title',
'page_is_new',
'page_id'
],
[
'rev_timestamp > ' . $dbw->addQuotes( $dbw->timestamp( $this->cutoffFrom ) ),
'rev_timestamp < ' . $dbw->addQuotes( $dbw->timestamp( $this->cutoffTo ) ),
'rev_page=page_id'
],
__METHOD__,
[ 'ORDER BY' => 'rev_timestamp DESC' ]
);
$this->output( "Inserting from page and revision tables...\n" );
$inserted = 0;
foreach ( $res as $row ) {
$dbw->insert(
'recentchanges',
[
'rc_timestamp' => $row->rev_timestamp,
'rc_user' => $row->rev_user,
'rc_user_text' => $row->rev_user_text,
'rc_namespace' => $row->page_namespace,
'rc_title' => $row->page_title,
'rc_comment' => $row->rev_comment,
'rc_minor' => $row->rev_minor_edit,
'rc_bot' => 0,
'rc_new' => $row->page_is_new,
'rc_cur_id' => $row->page_id,
'rc_this_oldid' => $row->rev_id,
'rc_last_oldid' => 0, // is this ok?
'rc_type' => $row->page_is_new ? RC_NEW : RC_EDIT,
'rc_source' => $row->page_is_new
? $dbw->addQuotes( RecentChange::SRC_NEW )
: $dbw->addQuotes( RecentChange::SRC_EDIT )
,
'rc_deleted' => $row->rev_deleted
],
__METHOD__
);
if ( ( ++$inserted % $this->mBatchSize ) == 0 ) {
wfGetLBFactory()->waitForReplication();
}
}
}
/**
* Rebuild pass 2: Enhance entries for page revisions with references to the previous revision
* (rc_last_oldid, rc_new etc.) and size differences (rc_old_len, rc_new_len).
*/
private function rebuildRecentChangesTablePass2() {
$dbw = $this->getDB( DB_MASTER );
$this->output( "Updating links and size differences...\n" );
# Fill in the rc_last_oldid field, which points to the previous edit
$res = $dbw->select(
'recentchanges',
[ 'rc_cur_id', 'rc_this_oldid', 'rc_timestamp' ],
[
"rc_timestamp > " . $dbw->addQuotes( $dbw->timestamp( $this->cutoffFrom ) ),
"rc_timestamp < " . $dbw->addQuotes( $dbw->timestamp( $this->cutoffTo ) )
],
__METHOD__,
[ 'ORDER BY' => 'rc_cur_id,rc_timestamp' ]
);
$lastCurId = 0;
$lastOldId = 0;
$lastSize = null;
$updated = 0;
foreach ( $res as $obj ) {
$new = 0;
if ( $obj->rc_cur_id != $lastCurId ) {
# Switch! Look up the previous last edit, if any
$lastCurId = intval( $obj->rc_cur_id );
$emit = $obj->rc_timestamp;
$row = $dbw->selectRow(
'revision',
[ 'rev_id', 'rev_len' ],
[ 'rev_page' => $lastCurId, "rev_timestamp < " . $dbw->addQuotes( $emit ) ],
__METHOD__,
[ 'ORDER BY' => 'rev_timestamp DESC' ]
);
if ( $row ) {
$lastOldId = intval( $row->rev_id );
# Grab the last text size if available
$lastSize = !is_null( $row->rev_len ) ? intval( $row->rev_len ) : null;
} else {
# No previous edit
$lastOldId = 0;
$lastSize = null;
$new = 1; // probably true
}
}
if ( $lastCurId == 0 ) {
$this->output( "Uhhh, something wrong? No curid\n" );
} else {
# Grab the entry's text size
$size = (int)$dbw->selectField(
'revision',
'rev_len',
[ 'rev_id' => $obj->rc_this_oldid ],
__METHOD__
);
$dbw->update(
'recentchanges',
[
'rc_last_oldid' => $lastOldId,
'rc_new' => $new,
'rc_type' => $new ? RC_NEW : RC_EDIT,
'rc_source' => $new === 1
? $dbw->addQuotes( RecentChange::SRC_NEW )
: $dbw->addQuotes( RecentChange::SRC_EDIT ),
'rc_old_len' => $lastSize,
'rc_new_len' => $size,
],
[
'rc_cur_id' => $lastCurId,
'rc_this_oldid' => $obj->rc_this_oldid,
'rc_timestamp' => $obj->rc_timestamp // index usage
],
__METHOD__
);
$lastOldId = intval( $obj->rc_this_oldid );
$lastSize = $size;
if ( ( ++$updated % $this->mBatchSize ) == 0 ) {
wfGetLBFactory()->waitForReplication();
}
}
}
}
/**
* Rebuild pass 3: Insert `recentchanges` entries for action logs.
*/
private function rebuildRecentChangesTablePass3() {
global $wgLogTypes, $wgLogRestrictions;
$dbw = $this->getDB( DB_MASTER );
$this->output( "Loading from user, page, and logging tables...\n" );
$res = $dbw->select(
[ 'user', 'logging', 'page' ],
[
'log_timestamp',
'log_user',
'user_name',
'log_namespace',
'log_title',
'log_comment',
'page_id',
'log_type',
'log_action',
'log_id',
'log_params',
'log_deleted'
],
[
'log_timestamp > ' . $dbw->addQuotes( $dbw->timestamp( $this->cutoffFrom ) ),
'log_timestamp < ' . $dbw->addQuotes( $dbw->timestamp( $this->cutoffTo ) ),
'log_user=user_id',
// Some logs don't go in RC since they are private.
// @FIXME: core/extensions also have spammy logs that don't go in RC.
'log_type' => array_diff( $wgLogTypes, array_keys( $wgLogRestrictions ) ),
],
__METHOD__,
[ 'ORDER BY' => 'log_timestamp DESC' ],
[
'page' =>
[ 'LEFT JOIN', [ 'log_namespace=page_namespace', 'log_title=page_title' ] ]
]
);
$inserted = 0;
foreach ( $res as $row ) {
$dbw->insert(
'recentchanges',
[
'rc_timestamp' => $row->log_timestamp,
'rc_user' => $row->log_user,
'rc_user_text' => $row->user_name,
'rc_namespace' => $row->log_namespace,
'rc_title' => $row->log_title,
'rc_comment' => $row->log_comment,
'rc_minor' => 0,
'rc_bot' => 0,
'rc_patrolled' => 1,
'rc_new' => 0,
'rc_this_oldid' => 0,
'rc_last_oldid' => 0,
'rc_type' => RC_LOG,
'rc_source' => $dbw->addQuotes( RecentChange::SRC_LOG ),
'rc_cur_id' => $dbw->cascadingDeletes()
? $row->page_id
: (int)$row->page_id, // NULL => 0,
'rc_log_type' => $row->log_type,
'rc_log_action' => $row->log_action,
'rc_logid' => $row->log_id,
'rc_params' => $row->log_params,
'rc_deleted' => $row->log_deleted
],
__METHOD__
);
if ( ( ++$inserted % $this->mBatchSize ) == 0 ) {
wfGetLBFactory()->waitForReplication();
}
}
}
/**
* Rebuild pass 4: Mark bot and autopatrolled entries.
*/
private function rebuildRecentChangesTablePass4() {
global $wgUseRCPatrol, $wgMiserMode;
$dbw = $this->getDB( DB_MASTER );
list( $recentchanges, $usergroups, $user ) =
$dbw->tableNamesN( 'recentchanges', 'user_groups', 'user' );
# @FIXME: recognize other bot account groups (not the same as users with 'bot' rights)
# @NOTE: users with 'bot' rights choose when edits are bot edits or not. That information
# may be lost at this point (aside from joining on the patrol log table entries).
$botgroups = [ 'bot' ];
$autopatrolgroups = $wgUseRCPatrol ? User::getGroupsWithPermission( 'autopatrol' ) : [];
# Flag our recent bot edits
if ( $botgroups ) {
$botwhere = $dbw->makeList( $botgroups );
$this->output( "Flagging bot account edits...\n" );
# Find all users that are bots
$sql = "SELECT DISTINCT user_name FROM $usergroups, $user " .
"WHERE ug_group IN($botwhere) AND user_id = ug_user";
$res = $dbw->query( $sql, __METHOD__ );
$botusers = [];
foreach ( $res as $obj ) {
$botusers[] = $obj->user_name;
}
# Fill in the rc_bot field
if ( $botusers ) {
$rcids = $dbw->selectFieldValues(
'recentchanges',
'rc_id',
[
'rc_user_text' => $botusers,
"rc_timestamp > " . $dbw->addQuotes( $dbw->timestamp( $this->cutoffFrom ) ),
"rc_timestamp < " . $dbw->addQuotes( $dbw->timestamp( $this->cutoffTo ) )
],
__METHOD__
);
foreach ( array_chunk( $rcids, $this->mBatchSize ) as $rcidBatch ) {
$dbw->update(
'recentchanges',
[ 'rc_bot' => 1 ],
[ 'rc_id' => $rcidBatch ],
__METHOD__
);
wfGetLBFactory()->waitForReplication();
}
}
}
# Flag our recent autopatrolled edits
if ( !$wgMiserMode && $autopatrolgroups ) {
$patrolwhere = $dbw->makeList( $autopatrolgroups );
$patrolusers = [];
$this->output( "Flagging auto-patrolled edits...\n" );
# Find all users in RC with autopatrol rights
$sql = "SELECT DISTINCT user_name FROM $usergroups, $user " .
"WHERE ug_group IN($patrolwhere) AND user_id = ug_user";
$res = $dbw->query( $sql, __METHOD__ );
foreach ( $res as $obj ) {
$patrolusers[] = $dbw->addQuotes( $obj->user_name );
}
# Fill in the rc_patrolled field
if ( $patrolusers ) {
$patrolwhere = implode( ',', $patrolusers );
$sql2 = "UPDATE $recentchanges SET rc_patrolled=1 " .
"WHERE rc_user_text IN($patrolwhere) " .
"AND rc_timestamp > " . $dbw->addQuotes( $dbw->timestamp( $this->cutoffFrom ) ) . ' ' .
"AND rc_timestamp < " . $dbw->addQuotes( $dbw->timestamp( $this->cutoffTo ) );
$dbw->query( $sql2 );
}
}
}
/**
* Rebuild pass 5: Delete duplicate entries where we generate both a page revision and a log entry
* for a single action (upload only, at the moment, but potentially also move, protect, ...).
*/
private function rebuildRecentChangesTablePass5() {
$dbw = wfGetDB( DB_MASTER );
$this->output( "Removing duplicate revision and logging entries...\n" );
$res = $dbw->select(
[ 'logging', 'log_search' ],
[ 'ls_value', 'ls_log_id' ],
[
'ls_log_id = log_id',
'ls_field' => 'associated_rev_id',
'log_type' => 'upload',
'log_timestamp > ' . $dbw->addQuotes( $dbw->timestamp( $this->cutoffFrom ) ),
'log_timestamp < ' . $dbw->addQuotes( $dbw->timestamp( $this->cutoffTo ) ),
],
__METHOD__
);
$updates = 0;
foreach ( $res as $obj ) {
$rev_id = $obj->ls_value;
$log_id = $obj->ls_log_id;
// Mark the logging row as having an associated rev id
$dbw->update(
'recentchanges',
/*SET*/ [ 'rc_this_oldid' => $rev_id ],
/*WHERE*/ [ 'rc_logid' => $log_id ],
__METHOD__
);
// Delete the revision row
$dbw->delete(
'recentchanges',
/*WHERE*/ [ 'rc_this_oldid' => $rev_id, 'rc_logid' => 0 ],
__METHOD__
);
if ( ( ++$updates % $this->mBatchSize ) == 0 ) {
wfGetLBFactory()->waitForReplication();
}
}
}
/**
* Purge cached feeds in $messageMemc
*/
private function purgeFeeds() {
global $wgFeedClasses, $messageMemc;
$this->output( "Deleting feed timestamps.\n" );
foreach ( $wgFeedClasses as $feed => $className ) {
$messageMemc->delete( wfMemcKey( 'rcfeed', $feed, 'timestamp' ) ); # Good enough for now.
}
}
}
$maintClass = "RebuildRecentchanges";
require_once RUN_MAINTENANCE_IF_MAIN;