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<?php
/**
* Accessors and mutators for the site-wide statistics.
*
* 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
*/
namespace MediaWiki\SiteStats;
use MediaWiki\JobQueue\Exceptions\JobQueueError;
use MediaWiki\MainConfigNames;
use MediaWiki\MediaWikiServices;
use stdClass;
use Wikimedia\Rdbms\Database;
use Wikimedia\Rdbms\ILoadBalancer;
use Wikimedia\Rdbms\IReadableDatabase;
/**
* Static accessor class for site_stats and related things
*/
class SiteStats {
/** @var stdClass|null */
private static $row;
/**
* Trigger a reload next time a field is accessed
*/
public static function unload() {
self::$row = null;
}
protected static function load() {
if ( self::$row === null ) {
self::$row = self::loadAndLazyInit();
}
}
/**
* @return stdClass
*/
protected static function loadAndLazyInit() {
$config = MediaWikiServices::getInstance()->getMainConfig();
$lb = self::getLB();
$dbr = $lb->getConnection( DB_REPLICA );
wfDebug( __METHOD__ . ": reading site_stats from replica DB" );
$row = self::doLoadFromDB( $dbr );
if ( !self::isRowSensible( $row ) && $lb->hasOrMadeRecentPrimaryChanges() ) {
// Might have just been initialized during this request? Underflow?
wfDebug( __METHOD__ . ": site_stats damaged or missing on replica DB" );
$row = self::doLoadFromDB( $lb->getConnection( DB_PRIMARY ) );
}
if ( !self::isRowSensible( $row ) ) {
if ( $config->get( MainConfigNames::MiserMode ) ) {
// Start off with all zeroes, assuming that this is a new wiki or any
// repopulations where done manually via script.
SiteStatsInit::doPlaceholderInit();
} else {
// Normally the site_stats table is initialized at install time.
// Some manual construction scenarios may leave the table empty or
// broken, however, for instance when importing from a dump into a
// clean schema with mwdumper.
wfDebug( __METHOD__ . ": initializing damaged or missing site_stats" );
SiteStatsInit::doAllAndCommit( $dbr );
}
$row = self::doLoadFromDB( $lb->getConnection( DB_PRIMARY ) );
}
return $row;
}
/**
* @return int
*/
public static function edits() {
self::load();
return (int)self::$row->ss_total_edits;
}
/**
* @return int
*/
public static function articles() {
self::load();
return (int)self::$row->ss_good_articles;
}
/**
* @return int
*/
public static function pages() {
self::load();
return (int)self::$row->ss_total_pages;
}
/**
* @return int
*/
public static function users() {
self::load();
return (int)self::$row->ss_users;
}
/**
* @return int
*/
public static function activeUsers() {
self::load();
return (int)self::$row->ss_active_users;
}
/**
* @return int
*/
public static function images() {
self::load();
return (int)self::$row->ss_images;
}
/**
* Find the number of users in a given user group.
* @param string $group Name of group
* @return int
*/
public static function numberingroup( $group ) {
$cache = MediaWikiServices::getInstance()->getMainWANObjectCache();
$fname = __METHOD__;
return $cache->getWithSetCallback(
$cache->makeKey( 'SiteStats', 'groupcounts', $group ),
$cache::TTL_HOUR,
static function ( $oldValue, &$ttl, array &$setOpts ) use ( $group, $fname ) {
$dbr = self::getLB()->getConnection( DB_REPLICA );
$setOpts += Database::getCacheSetOptions( $dbr );
return (int)$dbr->newSelectQueryBuilder()
->select( 'COUNT(*)' )
->from( 'user_groups' )
->where(
[
'ug_group' => $group,
$dbr->expr( 'ug_expiry', '=', null )->or( 'ug_expiry', '>=', $dbr->timestamp() )
]
)
->caller( $fname )
->fetchField();
},
[ 'pcTTL' => $cache::TTL_PROC_LONG ]
);
}
/**
* Total number of jobs in the job queue.
* @return int
*/
public static function jobs() {
$cache = MediaWikiServices::getInstance()->getMainWANObjectCache();
return $cache->getWithSetCallback(
$cache->makeKey( 'SiteStats', 'jobscount' ),
$cache::TTL_MINUTE,
static function ( $oldValue, &$ttl, array &$setOpts ) {
try {
$jobs = array_sum( MediaWikiServices::getInstance()->getJobQueueGroup()->getQueueSizes() );
} catch ( JobQueueError $e ) {
$jobs = 0;
}
return $jobs;
},
[ 'pcTTL' => $cache::TTL_PROC_LONG ]
);
}
/**
* @param int $ns
* @return int
*/
public static function pagesInNs( $ns ) {
$cache = MediaWikiServices::getInstance()->getMainWANObjectCache();
$fname = __METHOD__;
return $cache->getWithSetCallback(
$cache->makeKey( 'SiteStats', 'page-in-namespace', $ns ),
$cache::TTL_HOUR,
static function ( $oldValue, &$ttl, array &$setOpts ) use ( $ns, $fname ) {
$dbr = self::getLB()->getConnection( DB_REPLICA );
$setOpts += Database::getCacheSetOptions( $dbr );
return (int)$dbr->newSelectQueryBuilder()
->select( 'COUNT(*)' )
->from( 'page' )
->where( [ 'page_namespace' => $ns ] )
->caller( $fname )->fetchField();
},
[ 'pcTTL' => $cache::TTL_PROC_LONG ]
);
}
/**
* @return array
*/
public static function selectFields() {
return [
'ss_total_edits',
'ss_good_articles',
'ss_total_pages',
'ss_users',
'ss_active_users',
'ss_images',
];
}
/**
* @param IReadableDatabase $db
* @return stdClass|false
*/
private static function doLoadFromDB( IReadableDatabase $db ) {
$fields = self::selectFields();
$rows = $db->newSelectQueryBuilder()
->select( $fields )
->from( 'site_stats' )
->caller( __METHOD__ )
->fetchResultSet();
if ( !$rows->numRows() ) {
return false;
}
$finalRow = new stdClass();
foreach ( $rows as $row ) {
foreach ( $fields as $field ) {
$finalRow->$field ??= 0;
if ( $row->$field ) {
$finalRow->$field += $row->$field;
}
}
}
return $finalRow;
}
/**
* Is the provided row of site stats sensible, or should it be regenerated?
*
* Checks only fields which are filled by SiteStatsInit::refresh.
*
* @param stdClass|false $row
* @return bool
*/
private static function isRowSensible( $row ) {
if ( $row === false
|| $row->ss_total_pages < $row->ss_good_articles
|| $row->ss_total_edits < $row->ss_total_pages
) {
return false;
}
// Now check for underflow/overflow
foreach ( [
'ss_total_edits',
'ss_good_articles',
'ss_total_pages',
'ss_users',
'ss_images',
] as $member ) {
if ( $row->$member < 0 ) {
return false;
}
}
return true;
}
/**
* @return ILoadBalancer
*/
private static function getLB() {
return MediaWikiServices::getInstance()->getDBLoadBalancer();
}
}
/** @deprecated class alias since 1.41 */
class_alias( SiteStats::class, 'SiteStats' );