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<?php
/**
* This file contains a class to load aggregate message groups and handle
* the related cache.
*
* @file
* @author Abijeet Patro
* @license GPL-2.0-or-later
*/
use MediaWiki\MediaWikiServices;
use Wikimedia\Rdbms\IDatabase;
/**
* Loads AggregateMessageGroup, and handles the related cache.
* @since 2019.05
*/
class AggregateMessageGroupLoader extends MessageGroupLoader
implements CachedMessageGroupLoader {
private const CACHE_KEY = 'aggregate';
private const CACHE_VERSION = 2;
/** @var MessageGroupWANCache */
protected $cache;
/** @var IDatabase */
protected $db;
/**
* List of groups
* @var array|null
*/
protected $groups;
public function __construct( IDatabase $db, MessageGroupWANCache $cache ) {
$this->db = $db;
$this->cache = $cache;
$this->cache->configure(
[
'key' => self::CACHE_KEY,
'version' => self::CACHE_VERSION,
'regenerator' => [ $this, 'getCacheData' ],
]
);
}
/**
* Fetches the AggregateMessageGroups
*
* @return AggregateMessageGroup[] Key is the MessageGroup ID and value is the corresponding
* AggregateMessageGroup
*/
public function getGroups() {
if ( $this->groups === null ) {
$cacheData = $this->cache->getValue();
$this->groups = $this->initGroupsFromConf( $cacheData );
}
return $this->groups;
}
/**
* Hook: TranslateInitGroupLoaders
*
* @param array &$groupLoader
* @param array $deps Dependencies
*/
public static function registerLoader( array &$groupLoader, array $deps ) {
$groupLoader[] = self::getInstance(
$deps['database'],
$deps['cache']
);
}
/**
* Return an instance of this class using the parameters, if passed,
* else initialize the necessary dependencies and return an instance.
*
* @param IDatabase|null $db
* @param WANObjectCache|null $cache
* @return self
*/
public static function getInstance( IDatabase $db = null, WANObjectCache $cache = null ) {
return new self(
$db ?? TranslateUtils::getSafeReadDB(),
new MessageGroupWANCache(
$cache ?? MediaWikiServices::getInstance()->getMainWANObjectCache()
)
);
}
/**
* Get all the aggregate messages groups defined in translate_metadata table
* and return their configuration
* @return array
*/
public function getCacheData() {
$tables = [ 'translate_metadata' ];
$field = 'tmd_group';
$conds = [ 'tmd_key' => 'subgroups' ];
$groupIds = $this->db->selectFieldValues( $tables, $field, $conds, __METHOD__ );
TranslateMetadata::preloadGroups( $groupIds, __METHOD__ );
$groups = [];
foreach ( $groupIds as $id ) {
$conf = [];
$conf['BASIC'] = [
'id' => $id,
'label' => TranslateMetadata::get( $id, 'name' ),
'description' => TranslateMetadata::get( $id, 'description' ),
'meta' => 1,
'class' => AggregateMessageGroup::class,
'namespace' => NS_TRANSLATIONS,
];
$conf['GROUPS'] = TranslateMetadata::getSubgroups( $id );
$groups[$id] = $conf;
}
return $groups;
}
/**
* Loads AggregateMessageGroup from the database
*
* @return AggregateMessageGroup[]
*/
public function loadAggregateGroups() {
// get the data from the database everytime
$groupConf = $this->getCacheData();
return $this->initGroupsFromConf( $groupConf );
}
protected function initGroupsFromConf( $groups ) {
foreach ( $groups as $id => $conf ) {
$groups[ $id ] = MessageGroupBase::factory( $conf );
}
return $groups;
}
/**
* Clear and refill the cache with the latest values
*/
public function recache() {
$this->clearProcessCache();
$this->cache->touchKey();
$cacheData = $this->cache->getValue( 'recache' );
$this->groups = $this->initGroupsFromConf( $cacheData );
}
/**
* Clear values from the cache
*/
public function clearCache() {
$this->clearProcessCache();
$this->cache->delete();
}
/**
* Clears the process cache, mainly the cached groups property.
*/
protected function clearProcessCache() {
$this->groups = null;
}
}
|
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