TranslateEditAddons.php

<?php
declare( strict_types = 1 );
 
namespace MediaWiki\Extension\Translate\TranslatorInterface;
 
use MediaWiki\CommentStore\CommentStoreComment;
use MediaWiki\Content\TextContent;
use MediaWiki\Deferred\DeferredUpdates;
use MediaWiki\Extension\Translate\MessageGroupProcessing\MessageGroupStatesUpdaterJob;
use MediaWiki\Extension\Translate\MessageGroupProcessing\RevTagStore;
use MediaWiki\Extension\Translate\MessageLoading\MessageHandle;
use MediaWiki\Extension\Translate\PageTranslation\Hooks as PageTranslationHooks;
use MediaWiki\Extension\Translate\Services;
use MediaWiki\Extension\Translate\Statistics\MessageGroupStats;
use MediaWiki\Extension\Translate\TtmServer\TtmServer;
use MediaWiki\Logging\ManualLogEntry;
use MediaWiki\MediaWikiServices;
use MediaWiki\Page\PageIdentity;
use MediaWiki\Page\WikiPage;
use MediaWiki\Parser\ParserOptions;
use MediaWiki\Revision\RevisionRecord;
use MediaWiki\Storage\EditResult;
use MediaWiki\Title\Title;
use MediaWiki\User\User;
use MediaWiki\User\UserIdentity;
 
class TranslateEditAddons {
    public static function disallowLangTranslations(
        Title $title,
        User $user,
        string $action,
        &$result
    ): bool {
        if ( $action !== 'edit' ) {
            return true;
        }
 
        $handle = new MessageHandle( $title );
        if ( !$handle->isValid() ) {
            return true;
        }
 
        if ( $user->isAllowed( 'translate-manage' ) ) {
            return true;
        }
 
        $langCode = $handle->getCode();
        if ( $langCode === '' ) {
            return true;
        }
 
        $group = $handle->getGroup();
        if ( !$group ) {
            return true;
        }
 
        $configHelper = Services::getInstance()->getConfigHelper();
        $isDisabled = $configHelper->isTargetLanguageDisabled( $group, $langCode, $reason );
        if ( !$isDisabled ) {
            return true;
        }
 
        if ( $reason === null ) {
            $result = [ 'translate-language-disabled' ];
        } else {
            $result = [ 'translate-page-disabled', $reason ];
        }
 
        return false;
    }
 
    public static function onSaveComplete(
        WikiPage $wikiPage,
        UserIdentity $userIdentity,
        string $summary,
        int $flags,
        RevisionRecord $revisionRecord,
        EditResult $editResult
    ): void {
        global $wgEnablePageTranslation;
 
        $content = $wikiPage->getContent();
 
        if ( !$content instanceof TextContent ) {
            // Screw it, not interested
            return;
        }
 
        $text = $content->getText();
        $handle = new MessageHandle( $wikiPage->getTitle() );
 
        if ( !$handle->isValid() ) {
            return;
        }
 
        // TODO: Convert this method to a listener for PageLatestRevisionChangedEvent,
        // which provides a better way to detect dummy revisions and null edits.
        $isDummyRevision = !$editResult->isNew()
            && ( $editResult->getOriginalRevisionId() === $revisionRecord->getParentId() );
 
        if ( $isDummyRevision ) {
            // Dummy revisions should not unfuzzy the page, see T392321.
            // Fuzziness propagation for dummy revisions is handled in
            // HookHandler::onRevisionRecordInserted.
            // Returning here also protects against infinite recursion
            // when we insert a dummy revision below.
            return;
        }
 
        // Check if this is a null edit, i.e. no revision was created,
        // or a dummy revision, i.e. the content didn't change.
        // NOTE: $editResult->isNullEdit() does not distinguish between null
        // edits and dummy revisions (T392333). We need that distinction though,
        // since we want to create a dummy revision when we are informed about a
        // null edit.
        $isNullEdit = $editResult->getOriginalRevisionId() === $revisionRecord->getId();
 
        // Update it.
        $revId = $revisionRecord->getId();
        $mwServices = MediaWikiServices::getInstance();
 
        $fuzzy = $handle->needsFuzzy( $text );
        $parentId = $revisionRecord->getParentId();
        $revTagStore = Services::getInstance()->getRevTagStore();
        if ( $isNullEdit || $parentId == 0 ) {
            // In this case the page_latest hasn't changed so we can rely on its fuzzy status
            $wasFuzzy = $handle->isFuzzy();
        } else {
            // In this case the page_latest will (probably) have changed. The above might work by chance
            // since it reads from a replica database which might not have gotten the update yet, but
            // don't trust it and read the fuzzy status of the parent ID from the database instead
            $wasFuzzy = $revTagStore->isRevIdFuzzy( $wikiPage->getId(), $parentId );
        }
        if ( !$fuzzy && $wasFuzzy ) {
            $user = $mwServices->getUserFactory()->newFromUserIdentity( $userIdentity );
 
            if ( !$mwServices->getPermissionManager()->userCan( 'unfuzzy', $user, $wikiPage->getTitle() ) ) {
                // No permission to unfuzzy this unit so leave it fuzzy
                $fuzzy = true;
            } elseif ( $isNullEdit ) {
                $entry = new ManualLogEntry( 'translationreview', 'unfuzzy' );
                // Generate a log entry and null revision for the otherwise
                // invisible unfuzzying
                // NOTE: This will trigger onSaveComplete again! We have to be
                //       careful to avoid infinite recursion!
                $nullRevision = $mwServices->getPageUpdaterFactory()
                    ->newPageUpdater( $wikiPage, $userIdentity )
                    ->saveDummyRevision(
                        CommentStoreComment::newUnsavedComment(
                            $summary !== '' ? $summary : wfMessage( "translate-unfuzzy-comment" )
                        ),
                        EDIT_SILENT
                    );
 
                // Set $revId to the revision ID of the dummy revision so it (rather than the previous revision)
                // has the fuzzy and transver tags updated below.
                $revId = $nullRevision->getId();
                $entry->setAssociatedRevId( $revId );
                $entry->setPerformer( $userIdentity );
                $entry->setTarget( $wikiPage );
                $logId = $entry->insert();
                $entry->publish( $logId );
            }
        }
        // If the edit is already fuzzy due to validation, !!FUZZY!!, or lacking permissions to unfuzzy
        // then don't do revert checking (and don't set a transver below)
        // Otherwise, if the edit undoes or rolls back (but not manually reverts) to a fuzzy revision
        // then set the fuzzy status
        $revertedTo = null;
        if ( !$fuzzy && $editResult->isExactRevert() ) {
            $method = $editResult->getRevertMethod();
            if ( $method !== EditResult::REVERT_MANUAL ) {
                $revertedTo = $editResult->getOriginalRevisionId();
                // This is a paranoia check - if somehow getOriginalRevisionId returns null despite isExactRevert
                // being true just handle it like it wasn't a revert rather than crashing
                if ( $revertedTo !== null ) {
                    $fuzzy = $revTagStore->isRevIdFuzzy( $wikiPage->getId(), $revertedTo );
                }
            }
        }
 
        self::updateFuzzyTag( $wikiPage, $revId, $fuzzy );
 
        $group = $handle->getGroup();
        // Update translation stats - source language should always be up to date
        if ( $handle->getCode() !== $group->getSourceLanguage() ) {
            // This will update in-process cache immediately, but the value is saved
            // to the database in a deferred update. See MessageGroupStats::queueUpdates.
            // In case an error happens before that, the stats may be stale, but that
            // would be fixed by the next update or purge.
            MessageGroupStats::clear( $handle );
        }
 
        // This job asks for stats, however the updated stats are written in a deferred update.
        // To make it less likely that the job would be executed before the updated stats are
        // written, create the job inside a deferred update too.
        DeferredUpdates::addCallableUpdate(
            static function () use ( $handle ) {
                MessageGroupStatesUpdaterJob::onChange( $handle );
            }
        );
        $user = $mwServices->getUserFactory()
            ->newFromId( $userIdentity->getId() );
 
        if ( !$fuzzy ) {
            Services::getInstance()->getHookRunner()
                ->onTranslate_newTranslation( $handle, $revId, $text, $user );
        } elseif ( $revertedTo !== null ) {
            // If a revert sets fuzzy status then also set tp:transver
            // to the tp:transver of the version being reverted to
            $oldTransver = $revTagStore->getTransver( $wikiPage, $revertedTo );
            if ( $oldTransver !== null ) {
                $revTagStore->setTransver( $wikiPage, $revId, $oldTransver );
            }
        }
 
        TtmServer::onChange( $handle );
 
        if ( $wgEnablePageTranslation && $handle->isPageTranslation() ) {
            // Updates for translatable pages only
            $minor = (bool)( $flags & EDIT_MINOR );
            PageTranslationHooks::onSectionSave( $wikiPage, $user, $content,
                $summary, $minor, $flags, $handle );
        }
    }
 
    private static function updateFuzzyTag( PageIdentity $page, int $revision, bool $fuzzy ): void {
        $dbw = MediaWikiServices::getInstance()->getConnectionProvider()->getPrimaryDatabase();
 
        $conds = [
            'rt_page' => $page->getId(),
            'rt_type' => RevTagStore::FUZZY_TAG,
            'rt_revision' => $revision
        ];
 
        // Replace the existing fuzzy tag, if any
        if ( $fuzzy ) {
            $index = array_keys( $conds );
            $dbw->newReplaceQueryBuilder()
                ->replaceInto( 'revtag' )
                ->uniqueIndexFields( $index )
                ->row( $conds )
                ->caller( __METHOD__ )
                ->execute();
        } else {
            $dbw->newDeleteQueryBuilder()
                ->deleteFrom( 'revtag' )
                ->where( $conds )
                ->caller( __METHOD__ )
                ->execute();
        }
    }
 
    public static function updateTransverTag(
        MessageHandle $handle,
        int $revision,
        string $text,
        User $user
    ): bool {
        if ( $user->isAllowed( 'bot' ) ) {
            return false;
        }
 
        $group = $handle->getGroup();
 
        $title = $handle->getTitle();
        $name = $handle->getKey() . '/' . $group->getSourceLanguage();
        $definitionTitle = Title::makeTitleSafe( $title->getNamespace(), $name );
        if ( !$definitionTitle || !$definitionTitle->exists() ) {
            return true;
        }
 
        $definitionRevision = $definitionTitle->getLatestRevID();
        $revTagStore = Services::getInstance()->getRevTagStore();
        $revTagStore->setTransver( $title, $revision, $definitionRevision );
 
        return true;
    }
 
    public static function disablePreSaveTransform(
        WikiPage $wikiPage,
        ParserOptions $popts
    ): void {
        global $wgTranslateUsePreSaveTransform;
 
        if ( !$wgTranslateUsePreSaveTransform ) {
            $handle = new MessageHandle( $wikiPage->getTitle() );
            if ( $handle->isMessageNamespace() && !$handle->isDoc() ) {
                $popts->setPreSaveTransform( false );
            }
        }
    }
}