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<?php
namespace MediaWiki\Extension\Notifications;
use MediaWiki\MediaWikiServices;
use MediaWiki\User\UserIdentity;
use MediaWiki\Utils\MWTimestamp;
use MediaWiki\WikiMap\WikiMap;
/**
* Caches the result of UnreadWikis::getUnreadCounts() and interprets the results in various useful ways.
*
* If the user has disabled cross-wiki notifications in their preferences
* (see {@see ForeignNotifications::isEnabledByUser}), this class
* won't do anything and will behave as if the user has no foreign notifications. For example, getCount() will
* return 0. If you need to get foreign notification information for a user even though they may not have
* enabled the preference, set $forceEnable=true in the constructor.
*/
class ForeignNotifications {
/**
* @var UserIdentity
*/
protected $user;
/**
* @var bool
*/
protected $enabled = false;
/**
* @var array<string,int> [ section => count ]
*/
protected $counts = [ AttributeManager::ALERT => 0, AttributeManager::MESSAGE => 0 ];
/**
* @var array<string,string[]> [ section => wikis ]
*/
protected $wikis = [ AttributeManager::ALERT => [], AttributeManager::MESSAGE => [] ];
/**
* @var array<string,MWTimestamp|false> [ section => timestamp ]
*/
protected $timestamps = [ AttributeManager::ALERT => false, AttributeManager::MESSAGE => false ];
/**
* @var array<string,array<string,MWTimestamp|false>> [ wiki => [ section => timestamp ] ]
*/
protected $wikiTimestamps = [];
/**
* @var bool
*/
protected $populated = false;
/**
* @param UserIdentity $user
* @param bool $forceEnable Ignore the user's preferences and act as if they've enabled cross-wiki notifications
*/
public function __construct( UserIdentity $user, $forceEnable = false ) {
$this->user = $user;
$this->enabled = $forceEnable || $this->isEnabledByUser();
}
/**
* Whether the user has enabled cross-wiki notifications.
* @return bool
*/
public function isEnabledByUser() {
$userOptionsLookup = MediaWikiServices::getInstance()->getUserOptionsLookup();
return (bool)$userOptionsLookup->getOption( $this->user, 'echo-cross-wiki-notifications' );
}
/**
* @param string $section Name of section
* @return int
*/
public function getCount( $section = AttributeManager::ALL ) {
$this->populate();
if ( $section === AttributeManager::ALL ) {
$count = array_sum( $this->counts );
} else {
$count = $this->counts[$section] ?? 0;
}
return NotifUser::capNotificationCount( $count );
}
/**
* @param string $section Name of section
* @return MWTimestamp|false
*/
public function getTimestamp( $section = AttributeManager::ALL ) {
$this->populate();
if ( $section === AttributeManager::ALL ) {
$max = false;
/** @var MWTimestamp $timestamp */
foreach ( $this->timestamps as $timestamp ) {
// $timestamp < $max = invert 0
// $timestamp > $max = invert 1
if ( $timestamp !== false && ( $max === false || $timestamp->diff( $max )->invert === 1 ) ) {
$max = $timestamp;
}
}
return $max;
}
return $this->timestamps[$section] ?? false;
}
/**
* @param string $section Name of section
* @return string[]
*/
public function getWikis( $section = AttributeManager::ALL ): array {
$this->populate();
if ( $section === AttributeManager::ALL ) {
$all = [];
foreach ( $this->wikis as $wikis ) {
$all = array_merge( $all, $wikis );
}
return array_unique( $all );
}
return $this->wikis[$section] ?? [];
}
/**
* @param string $wiki
* @param string $section
* @return MWTimestamp|false
*/
public function getWikiTimestamp( $wiki, $section = AttributeManager::ALL ) {
$this->populate();
if ( !isset( $this->wikiTimestamps[$wiki] ) ) {
return false;
}
if ( $section === AttributeManager::ALL ) {
$max = false;
foreach ( $this->wikiTimestamps[$wiki] as $section => $ts ) {
// $ts < $max = invert 0
// $ts > $max = invert 1
if ( $max === false || $ts->diff( $max )->invert === 1 ) {
$max = $ts;
}
}
return $max;
}
return $this->wikiTimestamps[$wiki][$section] ?? false;
}
protected function populate() {
if ( $this->populated ) {
return;
}
if ( !$this->enabled ) {
return;
}
$unreadWikis = UnreadWikis::newFromUser( $this->user );
if ( !$unreadWikis ) {
return;
}
$unreadCounts = $unreadWikis->getUnreadCounts();
if ( !$unreadCounts ) {
return;
}
foreach ( $unreadCounts as $wiki => $sections ) {
// exclude current wiki
if ( $wiki === WikiMap::getCurrentWikiId() ) {
continue;
}
foreach ( $sections as $section => $data ) {
if ( $data['count'] > 0 ) {
$this->counts[$section] += $data['count'];
$this->wikis[$section][] = $wiki;
$timestamp = new MWTimestamp( $data['ts'] );
$this->wikiTimestamps[$wiki][$section] = $timestamp;
// We need $this->timestamp[$section] to be the max timestamp
// across all wikis.
// $timestamp < $this->timestamps[$section] = invert 0
// $timestamp > $this->timestamps[$section] = invert 1
if (
$this->timestamps[$section] === false ||
$timestamp->diff( $this->timestamps[$section] )->invert === 1
) {
$this->timestamps[$section] = new MWTimestamp( $data['ts'] );
}
}
}
}
$this->populated = true;
}
/**
* @param string[] $wikis
* @return array[] [(string) wiki => (array) data]
*/
public static function getApiEndpoints( array $wikis ): array {
global $wgConf;
$wgConf->loadFullData();
$urlUtils = MediaWikiServices::getInstance()->getUrlUtils();
$data = [];
foreach ( $wikis as $wiki ) {
$siteFromDB = $wgConf->siteFromDB( $wiki );
[ $major, $minor ] = $siteFromDB;
$server = $wgConf->get( 'wgServer', $wiki, $major, [ 'lang' => $minor, 'site' => $major ] );
$scriptPath = $wgConf->get( 'wgScriptPath', $wiki, $major, [ 'lang' => $minor, 'site' => $major ] );
$articlePath = $wgConf->get( 'wgArticlePath', $wiki, $major, [ 'lang' => $minor, 'site' => $major ] );
$data[$wiki] = [
'title' => static::getWikiTitle( $wiki, $siteFromDB ),
'url' => $urlUtils->expand( $server . $scriptPath . '/api.php', PROTO_INTERNAL ),
// We need this to link to Special:Notifications page
'base' => $urlUtils->expand( $server . $articlePath, PROTO_INTERNAL ),
];
}
return $data;
}
/**
* @param string $wikiId
* @param array|null $siteFromDB $wgConf->siteFromDB( $wikiId ) result
* @return mixed|string
*/
protected static function getWikiTitle( $wikiId, ?array $siteFromDB = null ) {
global $wgConf, $wgLang;
$msg = wfMessage( 'project-localized-name-' . $wikiId );
// check if WikimediaMessages localized project names are available
if ( $msg->exists() ) {
return $msg->text();
} else {
// Don't fetch [ $site, $langCode ] if known already
[ $site, $langCode ] = $siteFromDB ?? $wgConf->siteFromDB( $wikiId );
// try to fetch site name for this specific wiki, or fallback to the
// general project's sitename if there is no override
$wikiName = $wgConf->get( 'wgSitename', $wikiId ) ?: $wgConf->get( 'wgSitename', (string)$site );
$langName = MediaWikiServices::getInstance()->getLanguageNameUtils()
->getLanguageName( $langCode ?? '', $wgLang->getCode() );
if ( !$langName ) {
// if we can't find a language name (in language-agnostic
// project like mediawikiwiki), including the language name
// doesn't make much sense
return $wikiName;
}
// ... or use generic fallback
return wfMessage( 'echo-foreign-wiki-lang', $wikiName, $langName )->text();
}
}
}