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<?php
/**
* Translation aid code.
*
* @file
* @author Niklas Laxström
* @license GPL-2.0-or-later
*/
use Wikimedia\Rdbms\IDatabase;
/**
* @since 2018.01
*/
class TranslationAidDataProvider {
private $handle;
private $group;
private $definition;
private $translations;
public function __construct( MessageHandle $handle ) {
$this->handle = $handle;
$this->group = $handle->getGroup();
}
/**
* Get the message definition. Cached for performance.
*
* @return string
*/
public function getDefinition() {
if ( $this->definition !== null ) {
return $this->definition;
}
// Optional performance optimization
if ( method_exists( $this->group, 'getMessageContent' ) ) {
$this->definition = $this->group->getMessageContent( $this->handle );
} else {
$this->definition = $this->group->getMessage(
$this->handle->getKey(),
$this->group->getSourceLanguage()
);
}
return $this->definition;
}
/**
* @return Content
*/
public function getDefinitionContent() {
return ContentHandler::makeContent( $this->getDefinition(), $this->handle->getTitle() );
}
/**
* Get the translations in all languages. Cached for performance.
* Fuzzy translation are not included.
*
* @return array Language code => Translation
*/
public function getGoodTranslations() {
if ( $this->translations !== null ) {
return $this->translations;
}
$data = self::loadTranslationData( wfGetDB( DB_REPLICA ), $this->handle );
$translations = [];
$prefixLength = strlen( $this->handle->getTitleForBase()->getDBKey() . '/' );
foreach ( $data as $page => $translation ) {
// Could use MessageHandle here, but that queries the message index.
// Instead we can get away with simple string manipulation.
$code = substr( $page, $prefixLength );
if ( !Language::isKnownLanguageTag( $code ) ) {
continue;
}
$translations[ $code ] = $translation;
}
$this->translations = $translations;
return $translations;
}
private static function loadTranslationData( IDatabase $db, MessageHandle $handle ) {
if ( method_exists( 'Revision', 'getQueryInfo' ) ) {
$queryInfo = Revision::getQueryInfo( [ 'page', 'text' ] );
$tables = $queryInfo[ 'tables' ];
$fields = $queryInfo[ 'fields' ];
$conds = [];
$options = [];
$joins = $queryInfo[ 'joins' ];
} else {
// BC for <= MW 1.31
$tables = [ 'page', 'text', 'revision' ];
$fields = array_merge(
Revision::selectFields(),
Revision::selectPageFields(),
Revision::selectTextFields()
);
$conds = [];
$options = [];
$joins = [
'page' => Revision::pageJoinCond(),
'text' => [ 'INNER JOIN', [ 'rev_text_id=old_id' ] ]
];
}
// The list of pages we want to select, and their latest versions
$conds['page_namespace'] = $handle->getTitle()->getNamespace();
$base = $handle->getKey();
$conds[] = 'page_title ' . $db->buildLike( "$base/", $db->anyString() );
$conds[] = 'rev_id=page_latest';
// For fuzzy tags we also need:
$tables[] = 'revtag';
$conds[ 'rt_type' ] = null;
$joins[ 'revtag' ] = [
'LEFT JOIN',
[ 'page_id=rt_page', 'page_latest=rt_revision', 'rt_type' => 'fuzzy' ]
];
$rows = $db->select( $tables, $fields, $conds, __METHOD__, $options, $joins );
$pages = [];
foreach ( $rows as $row ) {
$pages[$row->page_title] = Revision::getRevisionText( $row );
}
return $pages;
}
}
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