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File: rebuildrecentchanges.php
<?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'; use MediaWiki\User\ActorMigration; use Wikimedia\Rdbms\IDatabase; /** * Maintenance script that rebuilds recent changes from scratch. * * @ingroup Maintenance */ class RebuildRecentchanges extends Maintenance { /** @var int UNIX timestamp */ private $cutoffFrom; /** @var int 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->fatalError( "Both 'from' and 'to' must be given, or neither" ); } $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_PRIMARY ); $commentStore = $this->getServiceContainer()->getCommentStore(); if ( $this->hasOption( 'from' ) && $this->hasOption( 'to' ) ) { $this->cutoffFrom = (int)wfTimestamp( TS_UNIX, $this->getOption( 'from' ) ); $this->cutoffTo = (int)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->newSelectQueryBuilder() ->select( 'rc_id' ) ->from( 'recentchanges' ) ->where( [ 'rc_timestamp > ' . $dbw->addQuotes( $dbw->timestamp( $this->cutoffFrom ) ) ] ) ->andWhere( [ 'rc_timestamp < ' . $dbw->addQuotes( $dbw->timestamp( $this->cutoffTo ) ) ] ) ->caller( __METHOD__ )->fetchFieldValues(); foreach ( array_chunk( $rcids, $this->getBatchSize() ) as $rcidBatch ) { $dbw->delete( 'recentchanges', [ 'rc_id' => $rcidBatch ], __METHOD__ ); $this->waitForReplication(); } $this->output( "Loading from page and revision tables...\n" ); $commentQuery = $commentStore->getJoin( 'rev_comment' ); $actorQuery = ActorMigration::newMigration()->getJoin( 'rev_user' ); $res = $dbw->select( [ 'revision', 'page' ] + $commentQuery['tables'] + $actorQuery['tables'], [ 'rev_timestamp', 'rev_minor_edit', 'rev_id', 'rev_deleted', 'page_namespace', 'page_title', 'page_is_new', 'page_id' ] + $commentQuery['fields'] + $actorQuery['fields'], [ 'rev_timestamp > ' . $dbw->addQuotes( $dbw->timestamp( $this->cutoffFrom ) ), 'rev_timestamp < ' . $dbw->addQuotes( $dbw->timestamp( $this->cutoffTo ) ) ], __METHOD__, [ 'ORDER BY' => 'rev_timestamp DESC' ], [ 'page' => [ 'JOIN', 'rev_page=page_id' ], ] + $commentQuery['joins'] + $actorQuery['joins'] ); $this->output( "Inserting from page and revision tables...\n" ); $inserted = 0; foreach ( $res as $row ) { $comment = $commentStore->getComment( 'rev_comment', $row ); $dbw->insert( 'recentchanges', [ 'rc_timestamp' => $row->rev_timestamp, 'rc_actor' => $row->rev_actor, 'rc_namespace' => $row->page_namespace, 'rc_title' => $row->page_title, '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 ? RecentChange::SRC_NEW : RecentChange::SRC_EDIT, 'rc_deleted' => $row->rev_deleted ] + $commentStore->insert( $dbw, 'rc_comment', $comment ), __METHOD__ ); $rcid = $dbw->insertId(); $dbw->update( 'change_tag', [ 'ct_rc_id' => $rcid ], [ 'ct_rev_id' => $row->rev_id ], __METHOD__ ); if ( ( ++$inserted % $this->getBatchSize() ) == 0 ) { $this->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_PRIMARY ); $this->output( "Updating links and size differences...\n" ); # Fill in the rc_last_oldid field, which points to the previous edit $res = $dbw->newSelectQueryBuilder() ->select( [ 'rc_cur_id', 'rc_this_oldid', 'rc_timestamp' ] ) ->from( 'recentchanges' ) ->where( [ "rc_timestamp > " . $dbw->addQuotes( $dbw->timestamp( $this->cutoffFrom ) ) ] ) ->andWhere( [ "rc_timestamp < " . $dbw->addQuotes( $dbw->timestamp( $this->cutoffTo ) ) ] ) ->orderBy( [ 'rc_cur_id', 'rc_timestamp' ] ) ->caller( __METHOD__ )->fetchResultSet(); $lastCurId = 0; $lastOldId = 0; $lastSize = null; $updated = 0; foreach ( $res as $row ) { $new = 0; if ( $row->rc_cur_id != $lastCurId ) { # Switch! Look up the previous last edit, if any $lastCurId = intval( $row->rc_cur_id ); $emit = $row->rc_timestamp; $revRow = $dbw->newSelectQueryBuilder() ->select( [ 'rev_id', 'rev_len' ] ) ->from( 'revision' ) ->where( [ 'rev_page' => $lastCurId, "rev_timestamp < " . $dbw->addQuotes( $emit ) ] ) ->orderBy( 'rev_timestamp DESC' ) ->caller( __METHOD__ )->fetchRow(); if ( $revRow ) { $lastOldId = intval( $revRow->rev_id ); # Grab the last text size if available $lastSize = $revRow->rev_len !== null ? intval( $revRow->rev_len ) : null; } else { # No previous edit $lastOldId = 0; $lastSize = 0; $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->newSelectQueryBuilder() ->select( 'rev_len' ) ->from( 'revision' ) ->where( [ 'rev_id' => $row->rc_this_oldid ] ) ->caller( __METHOD__ )->fetchField(); $dbw->update( 'recentchanges', [ 'rc_last_oldid' => $lastOldId, 'rc_new' => $new, 'rc_type' => $new ? RC_NEW : RC_EDIT, 'rc_source' => $new === 1 ? RecentChange::SRC_NEW : RecentChange::SRC_EDIT, 'rc_old_len' => $lastSize, 'rc_new_len' => $size, ], [ 'rc_cur_id' => $lastCurId, 'rc_this_oldid' => $row->rc_this_oldid, 'rc_timestamp' => $row->rc_timestamp // index usage ], __METHOD__ ); $lastOldId = intval( $row->rc_this_oldid ); $lastSize = $size; if ( ( ++$updated % $this->getBatchSize() ) == 0 ) { $this->waitForReplication(); } } } } /** * Rebuild pass 3: Insert `recentchanges` entries for action logs. */ private function rebuildRecentChangesTablePass3() { global $wgLogRestrictions, $wgFilterLogTypes; $dbw = $this->getDB( DB_PRIMARY ); $commentStore = $this->getServiceContainer()->getCommentStore(); $nonRCLogs = array_merge( array_keys( $wgLogRestrictions ), array_keys( $wgFilterLogTypes ), [ 'create' ] ); $this->output( "Loading from user and logging tables...\n" ); $commentQuery = $commentStore->getJoin( 'log_comment' ); $res = $dbw->select( [ 'logging' ] + $commentQuery['tables'], [ 'log_timestamp', 'log_actor', 'log_namespace', 'log_title', 'log_page', 'log_type', 'log_action', 'log_id', 'log_params', 'log_deleted' ] + $commentQuery['fields'], [ 'log_timestamp > ' . $dbw->addQuotes( $dbw->timestamp( $this->cutoffFrom ) ), 'log_timestamp < ' . $dbw->addQuotes( $dbw->timestamp( $this->cutoffTo ) ), // Some logs don't go in RC since they are private, or are included in the filterable log types. 'log_type' => array_diff( LogPage::validTypes(), $nonRCLogs ), ], __METHOD__, [ 'ORDER BY' => [ 'log_timestamp DESC', 'log_id DESC' ] ], $commentQuery['joins'] ); $field = $dbw->fieldInfo( 'recentchanges', 'rc_cur_id' ); $inserted = 0; foreach ( $res as $row ) { $comment = $commentStore->getComment( 'log_comment', $row ); $dbw->insert( 'recentchanges', [ 'rc_timestamp' => $row->log_timestamp, 'rc_actor' => $row->log_actor, 'rc_namespace' => $row->log_namespace, 'rc_title' => $row->log_title, 'rc_minor' => 0, 'rc_bot' => 0, 'rc_patrolled' => $row->log_type == 'upload' ? 0 : 2, 'rc_new' => 0, 'rc_this_oldid' => 0, 'rc_last_oldid' => 0, 'rc_type' => RC_LOG, 'rc_source' => RecentChange::SRC_LOG, 'rc_cur_id' => $field->isNullable() ? $row->log_page : (int)$row->log_page, // 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 ] + $commentStore->insert( $dbw, 'rc_comment', $comment ), __METHOD__ ); $rcid = $dbw->insertId(); $dbw->update( 'change_tag', [ 'ct_rc_id' => $rcid ], [ 'ct_log_id' => $row->log_id ], __METHOD__ ); if ( ( ++$inserted % $this->getBatchSize() ) == 0 ) { $this->waitForReplication(); } } } /** * Find rc_id values that have a user with one of the specified groups * * @param IDatabase $db * @param string[] $groups * @param array $conds Extra query conditions * @return int[] */ private function findRcIdsWithGroups( $db, $groups, $conds = [] ) { if ( !count( $groups ) ) { return []; } return $db->newSelectQueryBuilder() ->select( 'rc_id' ) ->distinct() ->from( 'recentchanges' ) ->join( 'actor', null, 'actor_id=rc_actor' ) ->join( 'user_groups', null, 'ug_user=actor_user' ) ->where( $conds ) ->andWhere( [ "rc_timestamp > " . $db->addQuotes( $db->timestamp( $this->cutoffFrom ) ), "rc_timestamp < " . $db->addQuotes( $db->timestamp( $this->cutoffTo ) ), 'ug_group' => $groups ] ) ->caller( __METHOD__ )->fetchFieldValues(); } /** * Rebuild pass 4: Mark bot and autopatrolled entries. */ private function rebuildRecentChangesTablePass4() { global $wgUseRCPatrol, $wgUseNPPatrol, $wgUseFilePatrol, $wgMiserMode; $dbw = $this->getDB( DB_PRIMARY ); # @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 || $wgUseNPPatrol || $wgUseFilePatrol ) ? $this->getServiceContainer()->getGroupPermissionsLookup() ->getGroupsWithPermission( 'autopatrol' ) : []; # Flag our recent bot edits // @phan-suppress-next-line PhanRedundantCondition if ( $botgroups ) { $this->output( "Flagging bot account edits...\n" ); # Fill in the rc_bot field $rcids = $this->findRcIdsWithGroups( $dbw, $botgroups ); foreach ( array_chunk( $rcids, $this->getBatchSize() ) as $rcidBatch ) { $dbw->update( 'recentchanges', [ 'rc_bot' => 1 ], [ 'rc_id' => $rcidBatch ], __METHOD__ ); $this->waitForReplication(); } } # Flag our recent autopatrolled edits if ( !$wgMiserMode && $autopatrolgroups ) { $this->output( "Flagging auto-patrolled edits...\n" ); $conds = [ 'rc_patrolled' => 0 ]; if ( !$wgUseRCPatrol ) { $subConds = []; if ( $wgUseNPPatrol ) { $subConds[] = 'rc_source = ' . $dbw->addQuotes( RecentChange::SRC_NEW ); } if ( $wgUseFilePatrol ) { $subConds[] = 'rc_log_type = ' . $dbw->addQuotes( 'upload' ); } $conds[] = $dbw->makeList( $subConds, IDatabase::LIST_OR ); } $rcids = $this->findRcIdsWithGroups( $dbw, $autopatrolgroups, $conds ); foreach ( array_chunk( $rcids, $this->getBatchSize() ) as $rcidBatch ) { $dbw->update( 'recentchanges', [ 'rc_patrolled' => 2 ], [ 'rc_id' => $rcidBatch ], __METHOD__ ); $this->waitForReplication(); } } } /** * Rebuild pass 5: Delete duplicate entries where we generate both a page revision and a log * entry for a single action (upload, move, protect, import, etc.). */ private function rebuildRecentChangesTablePass5() { $dbw = $this->getDB( DB_PRIMARY ); $this->output( "Removing duplicate revision and logging entries...\n" ); $res = $dbw->newSelectQueryBuilder() ->select( [ 'ls_value', 'ls_log_id' ] ) ->from( 'logging' ) ->join( 'log_search', null, 'ls_log_id = log_id' ) ->where( [ 'ls_field' => 'associated_rev_id', 'log_type != ' . $dbw->addQuotes( 'create' ), 'log_timestamp > ' . $dbw->addQuotes( $dbw->timestamp( $this->cutoffFrom ) ), 'log_timestamp < ' . $dbw->addQuotes( $dbw->timestamp( $this->cutoffTo ) ), ] ) ->caller( __METHOD__ )->fetchResultSet(); $updates = 0; foreach ( $res as $row ) { $rev_id = $row->ls_value; $log_id = $row->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->getBatchSize() ) == 0 ) { $this->waitForReplication(); } } } /** * Purge cached feeds in $wanCache */ private function purgeFeeds() { global $wgFeedClasses; $this->output( "Deleting feed timestamps.\n" ); $wanCache = $this->getServiceContainer()->getMainWANObjectCache(); foreach ( $wgFeedClasses as $feed => $className ) { $wanCache->delete( $wanCache->makeKey( 'rcfeed', $feed, 'timestamp' ) ); # Good enough for now. } } } $maintClass = RebuildRecentchanges::class; require_once RUN_MAINTENANCE_IF_MAIN;
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