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<?php
declare( strict_types = 1 );
namespace MediaWiki\Extension\Translate\MessageGroupProcessing;
use MediaWiki\Cache\LinkBatchFactory;
use MediaWiki\Extension\Translate\Utilities\Utilities;
use MediaWiki\Title\Title;
/**
* Generates list of subpages for the translatable bundle that can be
* moved or deleted
* @author Abijeet Patro
* @license GPL-2.0-or-later
* @since 2022.04
*/
class SubpageListBuilder {
private TranslatableBundleFactory $bundleFactory;
private LinkBatchFactory $linkBatchFactory;
public function __construct(
TranslatableBundleFactory $bundleFactory,
LinkBatchFactory $linkBatchFactory
) {
$this->bundleFactory = $bundleFactory;
$this->linkBatchFactory = $linkBatchFactory;
}
public function getSubpagesPerType( TranslatableBundle $bundle, bool $fetchTalkPages ): array {
$classifiedSubPages = $this->getEmptyResultSet();
$classifiedSubPages['translationPages'] = $bundle->getTranslationPages();
$classifiedSubPages['translationUnitPages'] = $bundle->getTranslationUnitPages();
// It's possible that subpages may not be allowed and getSubpages will return an
// empty array but that's not a problem.
$allSubpages = $bundle->getTitle()->getSubpages();
// Index the subpages
$allSubpagesIndexed = [];
foreach ( $allSubpages as $page ) {
$allSubpagesIndexed[ $page->getPrefixedDBkey() ] = $page;
}
// Remove translation pages from subpages
foreach ( $classifiedSubPages[ 'translationPages' ] as $translationPage ) {
if ( isset( $allSubpagesIndexed[ $translationPage->getPrefixedDBkey() ] ) ) {
unset( $allSubpagesIndexed[ $translationPage->getPrefixedDBkey() ] );
}
}
// Remove subpages that are translatable bundles
foreach ( $allSubpagesIndexed as $index => $subpage ) {
if ( $this->bundleFactory->getBundle( $subpage ) ) {
$classifiedSubPages['translatableSubpages'][] = $subpage;
unset( $allSubpagesIndexed[$index] );
}
}
// Remove translation pages for translatable pages found
$allSubpagesIndexed = $this->filterOtherTranslationPages(
$allSubpagesIndexed, $classifiedSubPages['translatableSubpages']
);
$classifiedSubPages['normalSubpages'] = $allSubpagesIndexed;
if ( $fetchTalkPages && !$bundle->getTitle()->isTalkPage() ) {
// We don't fetch talk pages for translatable subpages
$talkPages = $this->getTalkPages(
array_merge(
[ $bundle->getTitle() ],
$classifiedSubPages['translationPages'],
$classifiedSubPages['translationUnitPages'],
$classifiedSubPages['normalSubpages']
)
);
$translatableTalkPages = [];
foreach ( $talkPages as $key => $talkPage ) {
if ( $talkPage === null ) {
continue;
}
if ( $this->bundleFactory->getBundle( $talkPage ) ) {
$translatableTalkPages[] = $talkPage;
unset( $talkPages[$key] );
}
}
$classifiedSubPages['talkPages'] = $talkPages;
$classifiedSubPages['translatableTalkPages'] = $translatableTalkPages;
}
return $classifiedSubPages;
}
public function getEmptyResultSet(): array {
return [
'translationPages' => [],
'translatableSubpages' => [],
'translationUnitPages' => [],
'normalSubpages' => [],
'talkPages' => [],
'translatableTalkPages' => []
];
}
/**
* Remove translation pages for translatable pages from the list of all pages
* @param Title[] $allPages
* @param Title[] $translatablePages
*/
private function filterOtherTranslationPages( array $allPages, array $translatablePages ): array {
$mappedTranslatablePages = [];
foreach ( $translatablePages as $index => $page ) {
$mappedTranslatablePages[ $page->getText() ] = $index;
}
foreach ( $allPages as $prefixedDbKeyTitle => $subpage ) {
[ $key, ] = Utilities::figureMessage( $subpage->getText() );
if ( isset( $mappedTranslatablePages[ $key ] ) ) {
unset( $allPages[ $prefixedDbKeyTitle ] );
}
}
return $allPages;
}
/**
* To identify the talk pages, we first gather the possible talk pages into an array
* and then check that they exist. Title::exists perform a database check so we gather
* them into LinkBatch to reduce the performance impact.
* @param Title[] $pages
* @return Title[]
*/
private function getTalkPages( array $pages ): array {
$lb = $this->linkBatchFactory->newLinkBatch();
$talkPageList = [];
foreach ( $pages as $page ) {
$talkPage = $page->getTalkPageIfDefined();
$talkPageList[ $page->getPrefixedDBkey() ] = $talkPage;
if ( $talkPage ) {
$lb->addObj( $talkPage );
}
}
$lb->setCaller( __METHOD__ )->execute();
foreach ( $talkPageList as $index => $talkPage ) {
if ( !$talkPage || !$talkPage->exists() ) {
$talkPageList[$index] = null;
}
}
return $talkPageList;
}
}