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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
*/
/**
* Static accessor class for site_stats and related things
*/
class SiteStats {
/** @var bool|ResultWrapper */
private static $row;
/** @var bool */
private static $loaded = false;
/** @var int */
private static $jobs;
/** @var int[] */
private static $pageCount = [];
static function recache() {
self::load( true );
}
/**
* @param bool $recache
*/
static function load( $recache = false ) {
if ( self::$loaded && !$recache ) {
return;
}
self::$row = self::loadAndLazyInit();
# This code is somewhat schema-agnostic, because I'm changing it in a minor release -- TS
if ( !isset( self::$row->ss_total_pages ) && self::$row->ss_total_pages == -1 ) {
# Update schema
$u = new SiteStatsUpdate( 0, 0, 0 );
$u->doUpdate();
self::$row = self::doLoad( wfGetDB( DB_SLAVE ) );
}
self::$loaded = true;
}
/**
* @return bool|ResultWrapper
*/
static function loadAndLazyInit() {
global $wgMiserMode;
wfDebug( __METHOD__ . ": reading site_stats from slave\n" );
$row = self::doLoad( wfGetDB( DB_SLAVE ) );
if ( !self::isSane( $row ) ) {
// Might have just been initialized during this request? Underflow?
wfDebug( __METHOD__ . ": site_stats damaged or missing on slave\n" );
$row = self::doLoad( wfGetDB( DB_MASTER ) );
}
if ( !$wgMiserMode && !self::isSane( $row ) ) {
// 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\n" );
SiteStatsInit::doAllAndCommit( wfGetDB( DB_SLAVE ) );
$row = self::doLoad( wfGetDB( DB_MASTER ) );
}
if ( !self::isSane( $row ) ) {
wfDebug( __METHOD__ . ": site_stats persistently nonsensical o_O\n" );
}
return $row;
}
/**
* @param IDatabase $db
* @return bool|ResultWrapper
*/
static function doLoad( $db ) {
return $db->selectRow( 'site_stats', [
'ss_row_id',
'ss_total_edits',
'ss_good_articles',
'ss_total_pages',
'ss_users',
'ss_active_users',
'ss_images',
], false, __METHOD__ );
}
/**
* Return the total number of page views. Except we don't track those anymore.
* Stop calling this function, it will be removed some time in the future. It's
* kept here simply to prevent fatal errors.
*
* @deprecated since 1.25
* @return int
*/
static function views() {
wfDeprecated( __METHOD__, '1.25' );
return 0;
}
/**
* @return int
*/
static function edits() {
self::load();
return self::$row->ss_total_edits;
}
/**
* @return int
*/
static function articles() {
self::load();
return self::$row->ss_good_articles;
}
/**
* @return int
*/
static function pages() {
self::load();
return self::$row->ss_total_pages;
}
/**
* @return int
*/
static function users() {
self::load();
return self::$row->ss_users;
}
/**
* @return int
*/
static function activeUsers() {
self::load();
return self::$row->ss_active_users;
}
/**
* @return int
*/
static function images() {
self::load();
return self::$row->ss_images;
}
/**
* Find the number of users in a given user group.
* @param string $group Name of group
* @return int
*/
static function numberingroup( $group ) {
$cache = ObjectCache::getMainWANInstance();
return $cache->getWithSetCallback(
wfMemcKey( 'SiteStats', 'groupcounts', $group ),
$cache::TTL_HOUR,
function ( $oldValue, &$ttl, array &$setOpts ) use ( $group ) {
$dbr = wfGetDB( DB_SLAVE );
$setOpts += Database::getCacheSetOptions( $dbr );
return $dbr->selectField(
'user_groups',
'COUNT(*)',
[ 'ug_group' => $group ],
__METHOD__
);
},
[ 'pcTTL' => 10 ]
);
}
/**
* @return int
*/
static function jobs() {
if ( !isset( self::$jobs ) ) {
try{
self::$jobs = array_sum( JobQueueGroup::singleton()->getQueueSizes() );
} catch ( JobQueueError $e ) {
self::$jobs = 0;
}
/**
* Zero rows still do single row read for row that doesn't exist,
* but people are annoyed by that
*/
if ( self::$jobs == 1 ) {
self::$jobs = 0;
}
}
return self::$jobs;
}
/**
* @param int $ns
*
* @return int
*/
static function pagesInNs( $ns ) {
if ( !isset( self::$pageCount[$ns] ) ) {
$dbr = wfGetDB( DB_SLAVE );
self::$pageCount[$ns] = (int)$dbr->selectField(
'page',
'COUNT(*)',
[ 'page_namespace' => $ns ],
__METHOD__
);
}
return self::$pageCount[$ns];
}
/**
* Is the provided row of site stats sane, or should it be regenerated?
*
* Checks only fields which are filled by SiteStatsInit::refresh.
*
* @param bool|object $row
*
* @return bool
*/
private static function isSane( $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 > 2000000000 || $row->$member < 0 ) {
return false;
}
}
return true;
}
}
/**
* Class designed for counting of stats.
*/
class SiteStatsInit {
// Database connection
private $db;
// Various stats
private $mEdits = null, $mArticles = null, $mPages = null;
private $mUsers = null, $mFiles = null;
/**
* Constructor
* @param bool|IDatabase $database
* - boolean: Whether to use the master DB
* - IDatabase: Database connection to use
*/
public function __construct( $database = false ) {
if ( $database instanceof IDatabase ) {
$this->db = $database;
} elseif ( $database ) {
$this->db = wfGetDB( DB_MASTER );
} else {
$this->db = wfGetDB( DB_SLAVE, 'vslow' );
}
}
/**
* Count the total number of edits
* @return int
*/
public function edits() {
$this->mEdits = $this->db->selectField( 'revision', 'COUNT(*)', '', __METHOD__ );
$this->mEdits += $this->db->selectField( 'archive', 'COUNT(*)', '', __METHOD__ );
return $this->mEdits;
}
/**
* Count pages in article space(s)
* @return int
*/
public function articles() {
global $wgArticleCountMethod;
$tables = [ 'page' ];
$conds = [
'page_namespace' => MWNamespace::getContentNamespaces(),
'page_is_redirect' => 0,
];
if ( $wgArticleCountMethod == 'link' ) {
$tables[] = 'pagelinks';
$conds[] = 'pl_from=page_id';
} elseif ( $wgArticleCountMethod == 'comma' ) {
// To make a correct check for this, we would need, for each page,
// to load the text, maybe uncompress it, maybe decode it and then
// check if there's one comma.
// But one thing we are sure is that if the page is empty, it can't
// contain a comma :)
$conds[] = 'page_len > 0';
}
$this->mArticles = $this->db->selectField( $tables, 'COUNT(DISTINCT page_id)',
$conds, __METHOD__ );
return $this->mArticles;
}
/**
* Count total pages
* @return int
*/
public function pages() {
$this->mPages = $this->db->selectField( 'page', 'COUNT(*)', '', __METHOD__ );
return $this->mPages;
}
/**
* Count total users
* @return int
*/
public function users() {
$this->mUsers = $this->db->selectField( 'user', 'COUNT(*)', '', __METHOD__ );
return $this->mUsers;
}
/**
* Count total files
* @return int
*/
public function files() {
$this->mFiles = $this->db->selectField( 'image', 'COUNT(*)', '', __METHOD__ );
return $this->mFiles;
}
/**
* Do all updates and commit them. More or less a replacement
* for the original initStats, but without output.
*
* @param IDatabase|bool $database
* - boolean: Whether to use the master DB
* - IDatabase: Database connection to use
* @param array $options Array of options, may contain the following values
* - activeUsers boolean: Whether to update the number of active users (default: false)
*/
public static function doAllAndCommit( $database, array $options = [] ) {
$options += [ 'update' => false, 'activeUsers' => false ];
// Grab the object and count everything
$counter = new SiteStatsInit( $database );
$counter->edits();
$counter->articles();
$counter->pages();
$counter->users();
$counter->files();
$counter->refresh();
// Count active users if need be
if ( $options['activeUsers'] ) {
SiteStatsUpdate::cacheUpdate( wfGetDB( DB_MASTER ) );
}
}
/**
* Refresh site_stats
*/
public function refresh() {
$values = [
'ss_row_id' => 1,
'ss_total_edits' => ( $this->mEdits === null ? $this->edits() : $this->mEdits ),
'ss_good_articles' => ( $this->mArticles === null ? $this->articles() : $this->mArticles ),
'ss_total_pages' => ( $this->mPages === null ? $this->pages() : $this->mPages ),
'ss_users' => ( $this->mUsers === null ? $this->users() : $this->mUsers ),
'ss_images' => ( $this->mFiles === null ? $this->files() : $this->mFiles ),
];
$dbw = wfGetDB( DB_MASTER );
$dbw->upsert( 'site_stats', $values, [ 'ss_row_id' ], $values, __METHOD__ );
}
}