ManageGroupsSpecialPage.php

<?php
declare( strict_types = 1 );
 
namespace MediaWiki\Extension\Translate\Synchronization;
 
use ContentHandler;
use DeferredUpdates;
use DifferenceEngine;
use DisabledSpecialPage;
use Exception;
use FileBasedMessageGroup;
use Html;
use JobQueueGroup;
use Language;
use MediaWiki\Cache\LinkBatchFactory;
use MediaWiki\Extension\Translate\MessageGroupProcessing\MessageGroups;
use MediaWiki\Extension\Translate\MessageSync\MessageSourceChange;
use MediaWiki\Extension\Translate\Utilities\Utilities;
use MediaWiki\Logger\LoggerFactory;
use MediaWiki\MediaWikiServices;
use MediaWiki\Revision\RevisionLookup;
use MediaWiki\Revision\SlotRecord;
use MessageChangeStorage;
use MessageGroup;
use MessageHandle;
use MessageIndex;
use MessageUpdateJob;
use NamespaceInfo;
use OOUI\ButtonInputWidget;
use OutputPage;
use PermissionsError;
use RuntimeException;
use Skin;
use SpecialPage;
use TextContent;
use Title;
use UserBlockedError;
use WebRequest;
use Xml;
 
class ManageGroupsSpecialPage extends SpecialPage {
    private const GROUP_SYNC_INFO_WRAPPER_CLASS = 'smg-group-sync-cache-info';
    private const RIGHT = 'translate-manage';
    protected $diff;
    protected $cdb;
    protected $hasRight = false;
    private $contLang;
    private $nsInfo;
    private $revLookup;
    private $synchronizationCache;
    private $displayGroupSyncInfo;
    private $jobQueueGroup;
    private $messageIndex;
    private $linkBatchFactory;
 
    public function __construct(
        Language $contLang,
        NamespaceInfo $nsInfo,
        RevisionLookup $revLookup,
        GroupSynchronizationCache $synchronizationCache,
        JobQueueGroup $jobQueueGroup,
        MessageIndex $messageIndex,
        LinkBatchFactory $linkBatchFactory
    ) {
        // Anyone is allowed to see, but actions are restricted
        parent::__construct( 'ManageMessageGroups' );
        $this->contLang = $contLang;
        $this->nsInfo = $nsInfo;
        $this->revLookup = $revLookup;
        $this->synchronizationCache = $synchronizationCache;
        $this->displayGroupSyncInfo = new DisplayGroupSynchronizationInfo( $this, $this->getLinkRenderer() );
        $this->jobQueueGroup = $jobQueueGroup;
        $this->messageIndex = $messageIndex;
        $this->linkBatchFactory = $linkBatchFactory;
    }
 
    public function doesWrites() {
        return true;
    }
 
    protected function getGroupName() {
        return 'translation';
    }
 
    public function getDescription() {
        return $this->msg( 'managemessagegroups' )->text();
    }
 
    public function execute( $par ) {
        $this->setHeaders();
 
        $out = $this->getOutput();
        $out->addModuleStyles( 'ext.translate.specialpages.styles' );
        $out->addModules( 'ext.translate.special.managegroups' );
        $out->addHelpLink( 'Help:Extension:Translate/Group_management' );
 
        $name = $par ?: MessageChangeStorage::DEFAULT_NAME;
 
        $this->cdb = MessageChangeStorage::getCdbPath( $name );
        if ( !MessageChangeStorage::isValidCdbName( $name ) || !file_exists( $this->cdb ) ) {
            if ( $this->getConfig()->get( 'TranslateGroupSynchronizationCache' ) ) {
                $out->addHTML(
                    $this->displayGroupSyncInfo->getGroupsInSyncHtml(
                        $this->synchronizationCache->getGroupsInSync(),
                        self::GROUP_SYNC_INFO_WRAPPER_CLASS
                    )
                );
 
                $out->addHTML(
                    $this->displayGroupSyncInfo->getHtmlForGroupsWithError(
                        $this->synchronizationCache,
                        self::GROUP_SYNC_INFO_WRAPPER_CLASS,
                        $this->getLanguage()
                    )
                );
            }
 
            // @todo Tell them when changes was last checked/process
            // or how to initiate recheck.
            $out->addWikiMsg( 'translate-smg-nochanges' );
 
            return;
        }
 
        $user = $this->getUser();
        $this->hasRight = $user->isAllowed( self::RIGHT );
 
        $req = $this->getRequest();
        if ( !$req->wasPosted() ) {
            $this->showChanges( $this->getLimit() );
 
            return;
        }
 
        $block = $user->getBlock();
        if ( $block && $block->isSitewide() ) {
            throw new UserBlockedError(
                $block,
                $user,
                $this->getLanguage(),
                $req->getIP()
            );
        }
 
        $csrfTokenSet = $this->getContext()->getCsrfTokenSet();
        if ( !$this->hasRight || !$csrfTokenSet->matchTokenField( 'token' ) ) {
            throw new PermissionsError( self::RIGHT );
        }
 
        $this->processSubmit();
    }
 
    protected function getLimit(): int {
        $limits = [
            1000, // Default max
            ini_get( 'max_input_vars' ),
            ini_get( 'suhosin.post.max_vars' ),
            ini_get( 'suhosin.request.max_vars' )
        ];
        // Ignore things not set
        $limits = array_filter( $limits );
        return (int)min( $limits );
    }
 
    protected function getLegend(): string {
        $text = $this->diff->addHeader(
            '',
            $this->msg( 'translate-smg-left' )->escaped(),
            $this->msg( 'translate-smg-right' )->escaped()
        );
 
        return Html::rawElement( 'div', [ 'class' => 'mw-translate-smg-header' ], $text );
    }
 
    protected function showChanges( int $limit ): void {
        $diff = new DifferenceEngine( $this->getContext() );
        $diff->showDiffStyle();
        $diff->setReducedLineNumbers();
        $this->diff = $diff;
 
        $out = $this->getOutput();
        $out->addHTML(
            Html::openElement( 'form', [ 'method' => 'post' ] ) .
            Html::hidden( 'title', $this->getPageTitle()->getPrefixedText(), [
                'id' => 'smgPageTitle'
            ] ) .
            Html::hidden( 'token', $this->getContext()->getCsrfTokenSet()->getToken() ) .
            Html::hidden( 'changesetModifiedTime',
                MessageChangeStorage::getLastModifiedTime( $this->cdb ) ) .
            $this->getLegend()
        );
 
        // The above count as three
        $limit -= 3;
 
        $groupSyncCacheEnabled = $this->getConfig()->get( 'TranslateGroupSynchronizationCache' );
        if ( $groupSyncCacheEnabled ) {
            $out->addHTML(
                $this->displayGroupSyncInfo->getGroupsInSyncHtml(
                    $this->synchronizationCache->getGroupsInSync(),
                    self::GROUP_SYNC_INFO_WRAPPER_CLASS
                )
            );
 
            $out->addHTML(
                $this->displayGroupSyncInfo->getHtmlForGroupsWithError(
                    $this->synchronizationCache,
                    self::GROUP_SYNC_INFO_WRAPPER_CLASS,
                    $this->getLanguage()
                )
            );
        }
 
        $reader = \Cdb\Reader::open( $this->cdb );
        $groups = $this->getGroupsFromCdb( $reader );
        foreach ( $groups as $id => $group ) {
            $sourceChanges = MessageSourceChange::loadModifications(
                Utilities::deserialize( $reader->get( $id ) )
            );
            $out->addHTML( Html::element( 'h2', [], $group->getLabel() ) );
 
            if ( $groupSyncCacheEnabled && $this->synchronizationCache->groupHasErrors( $id ) ) {
                $out->addHTML(
                    Html::warningBox( $this->msg( 'translate-smg-group-sync-error-warn' )->escaped(), 'center' )
                );
            }
 
            // Reduce page existance queries to one per group
            $lb = $this->linkBatchFactory->newLinkBatch();
            $ns = $group->getNamespace();
            $isCap = $this->nsInfo->isCapitalized( $ns );
            $languages = $sourceChanges->getLanguages();
 
            foreach ( $languages as $language ) {
                $languageChanges = $sourceChanges->getModificationsForLanguage( $language );
                foreach ( $languageChanges as $type => $changes ) {
                    foreach ( $changes as $params ) {
                        // Constructing title objects is way slower
                        $key = $params['key'];
                        if ( $isCap ) {
                            $key = $this->contLang->ucfirst( $key );
                        }
                        $lb->add( $ns, "$key/$language" );
                    }
                }
            }
            $lb->execute();
 
            foreach ( $languages as $language ) {
                // Handle and generate UI for additions, deletions, change
                $changes = [];
                $changes[ MessageSourceChange::ADDITION ] = $sourceChanges->getAdditions( $language );
                $changes[ MessageSourceChange::DELETION ] = $sourceChanges->getDeletions( $language );
                $changes[ MessageSourceChange::CHANGE ] = $sourceChanges->getChanges( $language );
 
                foreach ( $changes as $type => $messages ) {
                    foreach ( $messages as $params ) {
                        $change = $this->formatChange( $group, $sourceChanges, $language, $type, $params, $limit );
                        $out->addHTML( $change );
 
                        if ( $limit <= 0 ) {
                            // We need to restrict the changes per page per form submission
                            // limitations as well as performance.
                            $out->wrapWikiMsg( "<div class=warning>\n$1\n</div>", 'translate-smg-more' );
                            break 4;
                        }
                    }
                }
 
                // Handle and generate UI for renames
                $this->showRenames( $group, $sourceChanges, $out, $language, $limit );
            }
        }
 
        $out->enableOOUI();
        $button = new ButtonInputWidget( [
            'type' => 'submit',
            'label' => $this->msg( 'translate-smg-submit' )->plain(),
            'disabled' => !$this->hasRight ? 'disabled' : null,
            'classes' => [ 'mw-translate-smg-submit' ],
            'title' => !$this->hasRight ? $this->msg( 'translate-smg-notallowed' )->plain() : null,
            'flags' => [ 'primary', 'progressive' ],
        ] );
        $out->addHTML( $button );
        $out->addHTML( Html::closeElement( 'form' ) );
    }
 
    protected function formatChange(
        MessageGroup $group,
        MessageSourceChange $changes,
        string $language,
        string $type,
        array $params,
        int &$limit
    ): string {
        $key = $params['key'];
        $title = Title::makeTitleSafe( $group->getNamespace(), "$key/$language" );
        $id = self::changeId( $group->getId(), $language, $type, $key );
        $noticeHtml = '';
        $isReusedKey = false;
 
        if ( $title && $type === 'addition' && $title->exists() ) {
            // The message has for some reason dropped out from cache
            // or perhaps it is being reused. In any case treat it
            // as a change for display, so the admin can see if
            // action is needed and let the message be processed.
            // Otherwise it will end up in the postponed category
            // forever and will prevent rebuilding the cache, which
            // leads to many other annoying problems.
            $type = 'change';
            $noticeHtml .= Html::warningBox( $this->msg( 'translate-manage-key-reused' )->text() );
            $isReusedKey = true;
        } elseif ( $title && ( $type === 'deletion' || $type === 'change' ) && !$title->exists() ) {
            // This happens if a message key has been renamed
            // The change can be ignored.
            return '';
        }
 
        $text = '';
        $titleLink = $this->getLinkRenderer()->makeLink( $title );
 
        if ( $type === 'deletion' ) {
            $content = $this->revLookup
                ->getRevisionByTitle( $title )
                ->getContent( SlotRecord::MAIN );
            $wiki = ( $content instanceof TextContent ) ? $content->getText() : '';
 
            if ( $wiki === '' ) {
                $noticeHtml .= Html::warningBox(
                    $this->msg( 'translate-manage-empty-content' )->text()
                );
            }
 
            $oldContent = ContentHandler::makeContent( (string)$wiki, $title );
            $newContent = ContentHandler::makeContent( '', $title );
            $this->diff->setContent( $oldContent, $newContent );
            $text = $this->diff->getDiff( $titleLink, '', $noticeHtml );
        } elseif ( $type === 'addition' ) {
            $menu = '';
            $sourceLanguage = $group->getSourceLanguage();
            if ( $sourceLanguage === $language ) {
                if ( $this->hasRight ) {
                    $menu = Html::rawElement(
                        'button',
                        [
                            'class' => 'smg-rename-actions',
                            'type' => 'button',
                            'data-group-id' => $group->getId(),
                            'data-lang' => $language,
                            'data-msgkey' => $key,
                            'data-msgtitle' => $title->getFullText()
                        ],
                        ''
                    );
                }
            } elseif ( !self::isMessageDefinitionPresent( $group, $changes, $key ) ) {
                $noticeHtml .= Html::warningBox(
                    $this->msg( 'translate-manage-source-message-not-found' )->text(),
                    'mw-translate-smg-notice-important'
                );
 
                // Automatically ignore messages that don't have a definitions
                $menu = Html::hidden( "msg/$id", 'ignore', [ 'id' => "i/$id" ] );
                $limit--;
            }
 
            if ( $params['content'] === '' ) {
                $noticeHtml .= Html::warningBox(
                    $this->msg( 'translate-manage-empty-content' )->text()
                );
            }
 
            $oldContent = ContentHandler::makeContent( '', $title );
            $newContent = ContentHandler::makeContent( (string)$params['content'], $title );
            $this->diff->setContent( $oldContent, $newContent );
            $text = $this->diff->getDiff( '', $titleLink . $menu, $noticeHtml );
        } elseif ( $type === 'change' ) {
            $wiki = Utilities::getContentForTitle( $title, true );
 
            $actions = '';
            $sourceLanguage = $group->getSourceLanguage();
 
            // Option to fuzzy is only available for source languages, and should be used
            // if content has changed.
            $shouldFuzzy = $sourceLanguage === $language && $wiki !== $params['content'];
 
            if ( $sourceLanguage === $language ) {
                $label = $this->msg( 'translate-manage-action-fuzzy' )->text();
                $actions .= Xml::radioLabel( $label, "msg/$id", "fuzzy", "f/$id", $shouldFuzzy );
            }
 
            if (
                $sourceLanguage !== $language &&
                $isReusedKey &&
                !self::isMessageDefinitionPresent( $group, $changes, $key )
            ) {
                $noticeHtml .= Html::warningBox(
                    $this->msg( 'translate-manage-source-message-not-found' )->text(),
                    'mw-translate-smg-notice-important'
                );
 
                // Automatically ignore messages that don't have a definitions
                $actions .= Html::hidden( "msg/$id", 'ignore', [ 'id' => "i/$id" ] );
                $limit--;
            } else {
                $label = $this->msg( 'translate-manage-action-import' )->text();
                $actions .= Xml::radioLabel( $label, "msg/$id", "import", "imp/$id", !$shouldFuzzy );
 
                $label = $this->msg( 'translate-manage-action-ignore' )->text();
                $actions .= Xml::radioLabel( $label, "msg/$id", "ignore", "i/$id" );
                $limit--;
            }
 
            $oldContent = ContentHandler::makeContent( (string)$wiki, $title );
            $newContent = ContentHandler::makeContent( (string)$params['content'], $title );
 
            $this->diff->setContent( $oldContent, $newContent );
            $text .= $this->diff->getDiff( $titleLink, $actions, $noticeHtml );
        }
 
        $hidden = Html::hidden( $id, 1 );
        $limit--;
        $text .= $hidden;
        $classes = "mw-translate-smg-change smg-change-$type";
 
        if ( $limit < 0 ) {
            // Don't add if one of the fields might get dropped of at submission
            return '';
        }
 
        return Html::rawElement( 'div', [ 'class' => $classes ], $text );
    }
 
    protected function processSubmit(): void {
        $req = $this->getRequest();
        $out = $this->getOutput();
        $errorGroups = [];
 
        $modificationJobs = $renameJobData = [];
        $lastModifiedTime = intval( $req->getVal( 'changesetModifiedTime' ) );
 
        if ( !MessageChangeStorage::isModifiedSince( $this->cdb, $lastModifiedTime ) ) {
            $out->addWikiMsg( 'translate-smg-changeset-modified' );
            return;
        }
 
        $reader = \Cdb\Reader::open( $this->cdb );
        $groups = $this->getGroupsFromCdb( $reader );
        $groupSyncCacheEnabled = $this->getConfig()->get( 'TranslateGroupSynchronizationCache' );
        $postponed = [];
 
        foreach ( $groups as $groupId => $group ) {
            try {
                if ( !$group instanceof FileBasedMessageGroup ) {
                    throw new RuntimeException( "Expected $groupId to be FileBasedMessageGroup, got "
                        . get_class( $group )
                        . " instead."
                    );
                }
                $changes = Utilities::deserialize( $reader->get( $groupId ) );
                if ( $groupSyncCacheEnabled && $this->synchronizationCache->groupHasErrors( $groupId ) ) {
                    $postponed[$groupId] = $changes;
                    continue;
                }
 
                $sourceChanges = MessageSourceChange::loadModifications( $changes );
                $groupModificationJobs = [];
                $groupRenameJobData = [];
                $languages = $sourceChanges->getLanguages();
                foreach ( $languages as $language ) {
                    // Handle changes, additions, deletions
                    $this->handleModificationsSubmit(
                        $group,
                        $sourceChanges,
                        $req,
                        $language,
                        $postponed,
                        $groupModificationJobs
                    );
 
                    // Handle renames, this might also add modification jobs based on user selection.
                    $this->handleRenameSubmit(
                        $group,
                        $sourceChanges,
                        $req,
                        $language,
                        $postponed,
                        $groupRenameJobData,
                        $groupModificationJobs
                    );
 
                    if ( !isset( $postponed[$groupId][$language] ) ) {
                        $group->getMessageGroupCache( $language )->create();
                    }
                }
 
                if ( $groupSyncCacheEnabled && !isset( $postponed[ $groupId ] ) ) {
                    $this->synchronizationCache->markGroupAsReviewed( $groupId );
                }
 
                $modificationJobs[$groupId] = $groupModificationJobs;
                $renameJobData[$groupId] = $groupRenameJobData;
            } catch ( Exception $e ) {
                error_log(
                    "ManageGroupsSpecialPage: Error in processSubmit. Group: $groupId\n" .
                    "Exception: $e"
                );
 
                $errorGroups[] = $group->getLabel();
            }
        }
 
        $renameJobs = $this->createRenameJobs( $renameJobData );
        $this->startSync( $modificationJobs, $renameJobs );
 
        $reader->close();
        rename( $this->cdb, $this->cdb . '-' . wfTimestamp() );
 
        if ( $errorGroups ) {
            $errorMsg = $this->getProcessingErrorMessage( $errorGroups, count( $groups ) );
            $out->addHTML(
                Html::warningBox(
                    $errorMsg,
                    'mw-translate-smg-submitted'
                )
            );
        }
 
        if ( count( $postponed ) ) {
            $postponedSourceChanges = [];
            foreach ( $postponed as $groupId => $changes ) {
                $postponedSourceChanges[$groupId] = MessageSourceChange::loadModifications( $changes );
            }
            MessageChangeStorage::writeChanges( $postponedSourceChanges, $this->cdb );
 
            $this->showChanges( $this->getLimit() );
        } elseif ( $errorGroups === [] ) {
            $out->addWikiMsg( 'translate-smg-submitted' );
        }
    }
 
    protected static function changeId(
        string $groupId,
        string $language,
        string $type,
        string $key
    ): string {
        return 'smg/' . substr( sha1( "$groupId/$language/$type/$key" ), 0, 7 );
    }
 
    public static function tabify( Skin $skin, array &$tabs ): void {
        $title = $skin->getTitle();
        if ( !$title->isSpecialPage() ) {
            return;
        }
        $specialPageFactory = MediaWikiServices::getInstance()->getSpecialPageFactory();
        [ $alias, ] = $specialPageFactory->resolveAlias( $title->getText() );
 
        $pagesInGroup = [
            'ManageMessageGroups' => 'namespaces',
            'AggregateGroups' => 'namespaces',
            'SupportedLanguages' => 'views',
            'TranslationStats' => 'views',
        ];
        if ( !isset( $pagesInGroup[$alias] ) ) {
            return;
        }
 
        $tabs['namespaces'] = [];
        foreach ( $pagesInGroup as $spName => $section ) {
            $spClass = $specialPageFactory->getPage( $spName );
 
            if ( $spClass === null || $spClass instanceof DisabledSpecialPage ) {
                continue; // Page explicitly disabled
            }
            $spTitle = $spClass->getPageTitle();
 
            $tabs[$section][strtolower( $spName )] = [
                'text' => $spClass->getDescription(),
                'href' => $spTitle->getLocalURL(),
                'class' => $alias === $spName ? 'selected' : '',
            ];
        }
    }
 
    private static function isMessageDefinitionPresent(
        MessageGroup $group,
        MessageSourceChange $changes,
        string $msgKey
    ): bool {
        $sourceLanguage = $group->getSourceLanguage();
        if ( $changes->findMessage( $sourceLanguage, $msgKey, [ MessageSourceChange::ADDITION ] ) ) {
            return true;
        }
 
        $namespace = $group->getNamespace();
        $sourceHandle = new MessageHandle( Title::makeTitle( $namespace, $msgKey ) );
        return $sourceHandle->isValid();
    }
 
    private function showRenames(
        MessageGroup $group,
        MessageSourceChange $sourceChanges,
        OutputPage $out,
        string $language,
        int &$limit
    ): void {
        $changes = $sourceChanges->getRenames( $language );
        foreach ( $changes as $key => $params ) {
            // Since we're removing items from the array within the loop add
            // a check here to ensure that the current key is still set.
            if ( !isset( $changes[ $key ] ) ) {
                continue;
            }
 
            if ( $group->getSourceLanguage() !== $language &&
                $sourceChanges->isEqual( $language, $key ) ) {
                    // This is a translation rename, that does not have any changes.
                    // We can group this along with the source rename.
                    continue;
            }
 
            // Determine added key, and corresponding removed key.
            $firstMsg = $params;
            $secondKey = $sourceChanges->getMatchedKey( $language, $key );
            $secondMsg = $sourceChanges->getMatchedMessage( $language, $key );
 
            if (
                $sourceChanges->isPreviousState(
                    $language,
                    $key,
                    [ MessageSourceChange::ADDITION, MessageSourceChange::CHANGE ]
                )
            ) {
                $addedMsg = $firstMsg;
                $deletedMsg = $secondMsg;
            } else {
                $addedMsg = $secondMsg;
                $deletedMsg = $firstMsg;
            }
 
            $change = $this->formatRename(
                $group,
                $addedMsg,
                $deletedMsg,
                $language,
                $sourceChanges->isEqual( $language, $key ),
                $limit
            );
            $out->addHTML( $change );
 
            // no need to process the second key again.
            unset( $changes[$secondKey] );
 
            if ( $limit <= 0 ) {
                // We need to restrict the changes per page per form submission
                // limitations as well as performance.
                $out->wrapWikiMsg( "<div class=warning>\n$1\n</div>", 'translate-smg-more' );
                break;
            }
        }
    }
 
    private function formatRename(
        MessageGroup $group,
        array $addedMsg,
        array $deletedMsg,
        string $language,
        bool $isEqual,
        int &$limit
    ): string {
        $addedKey = $addedMsg['key'];
        $deletedKey = $deletedMsg['key'];
        $actions = '';
 
        $addedTitle = Title::makeTitleSafe( $group->getNamespace(), "$addedKey/$language" );
        $deletedTitle = Title::makeTitleSafe( $group->getNamespace(), "$deletedKey/$language" );
        $id = self::changeId( $group->getId(), $language, MessageSourceChange::RENAME, $addedKey );
 
        $addedTitleLink = $this->getLinkRenderer()->makeLink( $addedTitle );
        $deletedTitleLink = $this->getLinkRenderer()->makeLink( $deletedTitle );
 
        $renameSelected = true;
        if ( $group->getSourceLanguage() === $language ) {
            if ( !$isEqual ) {
                $renameSelected = false;
                $label = $this->msg( 'translate-manage-action-rename-fuzzy' )->text();
                $actions .= Xml::radioLabel( $label, "msg/$id", "renamefuzzy", "rf/$id", true );
            }
 
            $label = $this->msg( 'translate-manage-action-rename' )->text();
            $actions .= Xml::radioLabel( $label, "msg/$id", "rename", "imp/$id", $renameSelected );
        } else {
            $label = $this->msg( 'translate-manage-action-import' )->text();
            $actions .= Xml::radioLabel( $label, "msg/$id", "import", "imp/$id", true );
        }
 
        if ( $group->getSourceLanguage() !== $language ) {
            // Allow user to ignore changes to non-source languages.
            $label = $this->msg( 'translate-manage-action-ignore-change' )->text();
            $actions .= Xml::radioLabel( $label, "msg/$id", "ignore", "i/$id" );
        }
        $limit--;
 
        $addedContent = ContentHandler::makeContent( (string)$addedMsg['content'], $addedTitle );
        $deletedContent = ContentHandler::makeContent( (string)$deletedMsg['content'], $deletedTitle );
        $this->diff->setContent( $deletedContent, $addedContent );
 
        $menu = '';
        if ( $group->getSourceLanguage() === $language && $this->hasRight ) {
            // Only show rename and add as new option for source language.
            $menu = Html::rawElement(
                'button',
                [
                    'class' => 'smg-rename-actions',
                    'type' => 'button',
                    'data-group-id' => $group->getId(),
                    'data-msgkey' => $addedKey,
                    'data-msgtitle' => $addedTitle->getFullText()
                ], ''
            );
        }
 
        $actions = Html::rawElement( 'div', [ 'class' => 'smg-change-import-options' ], $actions );
 
        $text = $this->diff->getDiff(
            $deletedTitleLink,
            $addedTitleLink . $menu . $actions,
            $isEqual ? htmlspecialchars( $addedMsg['content'] ) : ''
        );
 
        $hidden = Html::hidden( $id, 1 );
        $limit--;
        $text .= $hidden;
 
        return Html::rawElement(
            'div',
            [ 'class' => 'mw-translate-smg-change smg-change-rename' ],
            $text
        );
    }
 
    private function getRenameJobParams(
        array $currentMsg,
        MessageSourceChange $sourceChanges,
        string $languageCode,
        int $groupNamespace,
        string $selectedVal,
        bool $isSourceLang = true
    ): ?array {
        if ( $selectedVal === 'ignore' ) {
            return null;
        }
 
        $params = [];
        $replacementContent = '';
        $currentMsgKey = $currentMsg['key'];
        $matchedMsg = $sourceChanges->getMatchedMessage( $languageCode, $currentMsgKey );
        $matchedMsgKey = $matchedMsg['key'];
 
        if (
            $sourceChanges->isPreviousState(
                $languageCode,
                $currentMsgKey,
                [ MessageSourceChange::ADDITION, MessageSourceChange::CHANGE ]
            )
        ) {
            $params['target'] = $matchedMsgKey;
            $params['replacement'] = $currentMsgKey;
            $replacementContent = $currentMsg['content'];
        } else {
            $params['target'] = $currentMsgKey;
            $params['replacement'] = $matchedMsgKey;
            $replacementContent = $matchedMsg['content'];
        }
 
        $params['fuzzy'] = $selectedVal === 'renamefuzzy';
 
        $params['content'] = $replacementContent;
 
        if ( $isSourceLang ) {
            $params['targetTitle'] = Title::newFromText(
                Utilities::title( $params['target'], $languageCode, $groupNamespace ),
                $groupNamespace
            );
            $params['others'] = [];
        }
 
        return $params;
    }
 
    private function handleRenameSubmit(
        MessageGroup $group,
        MessageSourceChange $sourceChanges,
        WebRequest $req,
        string $language,
        array &$postponed,
        array &$jobData,
        array &$modificationJobs
    ): void {
        $groupId = $group->getId();
        $renames = $sourceChanges->getRenames( $language );
        $isSourceLang = $group->getSourceLanguage() === $language;
        $groupNamespace = $group->getNamespace();
 
        foreach ( $renames as $key => $params ) {
            // Since we're removing items from the array within the loop add
            // a check here to ensure that the current key is still set.
            if ( !isset( $renames[$key] ) ) {
                continue;
            }
 
            $id = self::changeId( $groupId, $language, MessageSourceChange::RENAME, $key );
 
            [ $renameMissing, $isCurrentKeyPresent ] = $this->isRenameMissing(
                $req,
                $sourceChanges,
                $id,
                $key,
                $language,
                $groupId,
                $isSourceLang
            );
 
            if ( $renameMissing ) {
                // we probably hit the limit with number of post parameters since neither
                // addition nor deletion key is present.
                $postponed[$groupId][$language][MessageSourceChange::RENAME][$key] = $params;
                continue;
            }
 
            if ( !$isCurrentKeyPresent ) {
                // still don't process this key, and wait for the matched rename
                continue;
            }
 
            $selectedVal = $req->getVal( "msg/$id" );
            $jobParams = $this->getRenameJobParams(
                $params,
                $sourceChanges,
                $language,
                $groupNamespace,
                $selectedVal,
                $isSourceLang
            );
 
            if ( $jobParams === null ) {
                continue;
            }
 
            $targetStr = $jobParams[ 'target' ];
            if ( $isSourceLang ) {
                $jobData[ $targetStr ] = $jobParams;
            } elseif ( isset( $jobData[ $targetStr ] ) ) {
                // We are grouping the source rename, and content changes in other languages
                // for the message together into a single job in order to avoid race conditions
                // since jobs are not guaranteed to be run in order.
                $jobData[ $targetStr ][ 'others' ][ $language ] = $jobParams[ 'content' ];
            } else {
                // the source was probably ignored, we should add this as a modification instead,
                // since the source is not going to be renamed.
                $title = Title::newFromText(
                    Utilities::title( $targetStr, $language, $groupNamespace ),
                    $groupNamespace
                );
                $modificationJobs[] = MessageUpdateJob::newJob( $title, $jobParams['content'] );
            }
 
            // remove the matched key in order to avoid double processing.
            $matchedKey = $sourceChanges->getMatchedKey( $language, $key );
            unset( $renames[$matchedKey] );
        }
    }
 
    private function handleModificationsSubmit(
        MessageGroup $group,
        MessageSourceChange $sourceChanges,
        WebRequest $req,
        string $language,
        array &$postponed,
        array &$messageUpdateJob
    ): void {
        $groupId = $group->getId();
        $subchanges = $sourceChanges->getModificationsForLanguage( $language );
 
        // Ignore renames
        unset( $subchanges[ MessageSourceChange::RENAME ] );
 
        // Handle additions, deletions, and changes.
        foreach ( $subchanges as $type => $messages ) {
            foreach ( $messages as $index => $params ) {
                $key = $params['key'];
                $id = self::changeId( $groupId, $language, $type, $key );
                $title = Title::makeTitleSafe( $group->getNamespace(), "$key/$language" );
 
                if ( !$this->isTitlePresent( $title, $type ) ) {
                    continue;
                }
 
                if ( !$req->getCheck( $id ) ) {
                    // We probably hit the limit with number of post parameters.
                    $postponed[$groupId][$language][$type][$index] = $params;
                    continue;
                }
 
                $selectedVal = $req->getVal( "msg/$id" );
                if ( $type === MessageSourceChange::DELETION || $selectedVal === 'ignore' ) {
                    continue;
                }
 
                $fuzzy = $selectedVal === 'fuzzy';
                $messageUpdateJob[] = MessageUpdateJob::newJob( $title, $params['content'], $fuzzy );
            }
        }
    }
 
    private function createRenameJobs( array $jobParams ): array {
        $jobs = [];
        foreach ( $jobParams as $groupId => $groupJobParams ) {
            $jobs[$groupId] = $jobs[$groupId] ?? [];
            foreach ( $groupJobParams as $params ) {
                $jobs[$groupId][] = MessageUpdateJob::newRenameJob(
                    $params['targetTitle'],
                    $params['target'],
                    $params['replacement'],
                    $params['fuzzy'],
                    $params['content'],
                    $params['others']
                );
            }
        }
 
        return $jobs;
    }
 
    private function isTitlePresent( Title $title, string $type ): bool {
        // phpcs:ignore SlevomatCodingStandard.ControlStructures.UselessIfConditionWithReturn
        if (
            ( $type === MessageSourceChange::DELETION || $type === MessageSourceChange::CHANGE ) &&
            !$title->exists()
        ) {
            // This means that this change was probably introduced due to a rename
            // which removed the key. No need to process.
            return false;
        }
        return true;
    }
 
    private function isRenameMissing(
        WebRequest $req,
        MessageSourceChange $sourceChanges,
        string $id,
        string $key,
        string $language,
        string $groupId,
        bool $isSourceLang
    ): array {
        if ( $req->getCheck( $id ) ) {
            return [ false, true ];
        }
 
        $isCurrentKeyPresent = false;
 
        // Checked the matched key is also missing to confirm if its truly missing
        $matchedKey = $sourceChanges->getMatchedKey( $language, $key );
        $matchedId = self::changeId( $groupId, $language, MessageSourceChange::RENAME, $matchedKey );
        if ( $req->getCheck( $matchedId ) ) {
            return [ false, $isCurrentKeyPresent ];
        }
 
        // For non source language, if strings are equal, they are not shown on the UI
        // and hence not submitted.
        return [
            $isSourceLang || !$sourceChanges->isEqual( $language, $matchedKey ),
            $isCurrentKeyPresent
        ];
    }
 
    private function getProcessingErrorMessage( array $errorGroups, int $totalGroupCount ): string {
        // Number of error groups, are less than the total groups processed.
        if ( count( $errorGroups ) < $totalGroupCount ) {
            $errorMsg = $this->msg( 'translate-smg-submitted-with-failure' )
                ->numParams( count( $errorGroups ) )
                ->params(
                    $this->getLanguage()->commaList( $errorGroups ),
                    $this->msg( 'translate-smg-submitted-others-processing' )
                )->text();
        } else {
            $errorMsg = trim(
                $this->msg( 'translate-smg-submitted-with-failure' )
                    ->numParams( count( $errorGroups ) )
                    ->params( $this->getLanguage()->commaList( $errorGroups ), '' )
                    ->text()
            );
        }
 
        return $errorMsg;
    }
 
    private function getGroupsFromCdb( \Cdb\Reader $reader ): array {
        $groups = [];
        $groupIds = Utilities::deserialize( $reader->get( '#keys' ) );
        foreach ( $groupIds as $id ) {
            $groups[$id] = MessageGroups::getGroup( $id );
        }
        return array_filter( $groups );
    }
 
    private function startSync( array $modificationJobs, array $renameJobs ): void {
        // We are adding an empty array for groups that have no jobs. This is mainly done to
        // avoid adding unnecessary checks. Remove those using array_filter
        $modificationGroupIds = array_keys( array_filter( $modificationJobs ) );
        $renameGroupIds = array_keys( array_filter( $renameJobs ) );
        $uniqueGroupIds = array_unique( array_merge( $modificationGroupIds, $renameGroupIds ) );
        $jobQueueInstance = $this->jobQueueGroup;
 
        foreach ( $uniqueGroupIds as $groupId ) {
            $messages = [];
            $messageKeys = [];
            $groupJobs = [];
 
            $groupRenameJobs = $renameJobs[$groupId] ?? [];
            foreach ( $groupRenameJobs as $job ) {
                $groupJobs[] = $job;
                $messageUpdateParam = MessageUpdateParameter::createFromJob( $job );
                $messages[] = $messageUpdateParam;
 
                // Build the handle to add the message key in interim cache
                $replacement = $messageUpdateParam->getReplacementValue();
                $targetTitle = Title::makeTitle( $job->getTitle()->getNamespace(), $replacement );
                $messageKeys[] = ( new MessageHandle( $targetTitle ) )->getKey();
            }
 
            $groupModificationJobs = $modificationJobs[$groupId] ?? [];
            foreach ( $groupModificationJobs as $job ) {
                $groupJobs[] = $job;
                $messageUpdateParam = MessageUpdateParameter::createFromJob( $job );
                $messages[] = $messageUpdateParam;
 
                $messageKeys[] = ( new MessageHandle( $job->getTitle() ) )->getKey();
            }
 
            // Store all message keys in the interim cache - we're particularly interested in new
            // and renamed messages, but it's cleaner to just store everything.
            $group = MessageGroups::getGroup( $groupId );
            $this->messageIndex->storeInterim( $group, $messageKeys );
 
            if ( $this->getConfig()->get( 'TranslateGroupSynchronizationCache' ) ) {
                $this->synchronizationCache->addMessages( $groupId, ...$messages );
                $this->synchronizationCache->markGroupForSync( $groupId );
 
                LoggerFactory::getInstance( 'Translate.GroupSynchronization' )->info(
                    '[' . __CLASS__ . '] Synchronization started for {groupId} by {user}',
                    [
                        'groupId' => $groupId,
                        'user' => $this->getUser()->getName()
                    ]
                );
            }
 
            // There is posibility for a race condition here: the translate_cache table / group sync
            // cache is not yet populated with the messages to be processed, but the jobs start
            // running and try to remove the message from the cache. This results in a "Key not found"
            // error. Avoid this condition by using a DeferredUpdate.
            DeferredUpdates::addCallableUpdate(
                static function () use ( $jobQueueInstance, $groupJobs ) {
                    $jobQueueInstance->push( $groupJobs );
                }
            );
 
        }
    }
}