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<?php
declare( strict_types = 1 );
namespace MediaWiki\Extension\Translate\Synchronization;
use FileBasedMessageGroup;
use LogicException;
use MediaWiki\Extension\Translate\FileFormatSupport\GettextFormat;
use MediaWiki\Extension\Translate\MessageGroupProcessing\MessageGroups;
use MediaWiki\Extension\Translate\MessageLoading\MessageCollection;
use MediaWiki\Extension\Translate\MessageLoading\MessageHandle;
use MediaWiki\Extension\Translate\PageTranslation\TranslatablePage;
use MediaWiki\Extension\Translate\Utilities\Utilities;
use MediaWiki\Html\Html;
use MediaWiki\HTMLForm\HTMLForm;
use MediaWiki\Language\FormatterFactory;
use MediaWiki\Message\Message;
use MediaWiki\Parser\ParserFactory;
use MediaWiki\SpecialPage\SpecialPage;
use MediaWiki\Status\Status;
use MediaWiki\Status\StatusFormatter;
use MediaWiki\Title\Title;
use MediaWiki\Title\TitleFormatter;
use MessageGroup;
use WikiPageMessageGroup;
/**
* This special page allows exporting groups for offline translation.
*
* @author Niklas Laxström
* @author Siebrand Mazeland
* @license GPL-2.0-or-later
* @ingroup SpecialPage TranslateSpecialPage
*/
class ExportTranslationsSpecialPage extends SpecialPage {
/** Maximum size of a group until exporting is not allowed due to performance reasons. */
public const MAX_EXPORT_SIZE = 10000;
protected string $language;
protected string $format;
protected string $groupId;
private TitleFormatter $titleFormatter;
private ParserFactory $parserFactory;
private StatusFormatter $statusFormatter;
/** @var string[] */
private const VALID_FORMATS = [ 'export-as-po', 'export-to-file', 'export-as-csv' ];
public function __construct(
TitleFormatter $titleFormatter,
ParserFactory $parserFactory,
FormatterFactory $formatterFactory
) {
parent::__construct( 'ExportTranslations' );
$this->titleFormatter = $titleFormatter;
$this->parserFactory = $parserFactory;
$this->statusFormatter = $formatterFactory->getStatusFormatter( $this );
}
/** @param null|string $par */
public function execute( $par ) {
$out = $this->getOutput();
$request = $this->getRequest();
$lang = $this->getLanguage();
$this->setHeaders();
$this->groupId = $request->getText( 'group', $par ?? '' );
$this->language = $request->getVal( 'language', $lang->getCode() );
$this->format = $request->getText( 'format' );
$this->outputForm();
$out->addModules( 'ext.translate.special.exporttranslations' );
$out->addModuleStyles( 'mediawiki.codex.messagebox.styles' );
if ( $this->groupId ) {
$status = $this->checkInput();
if ( !$status->isGood() ) {
$out->addHTML(
Html::errorBox( $this->statusFormatter->getHTML( $status, [ 'lang' => $lang ] ) )
);
return;
}
$status = $this->doExport();
if ( !$status->isGood() ) {
$out->addHTML(
Html::errorBox( $this->statusFormatter->getHTML( $status, [ 'lang' => $lang ] ) )
);
}
}
}
private function outputForm(): void {
$fields = [
'group' => [
'type' => 'select',
'name' => 'group',
'id' => 'group',
'label-message' => 'translate-page-group',
'options' => $this->getGroupOptions(),
'default' => $this->groupId,
],
'language' => [
// @todo Apply ULS to this field
'type' => 'select',
'name' => 'language',
'id' => 'language',
'label-message' => 'translate-page-language',
'options' => $this->getLanguageOptions(),
'default' => $this->language,
],
'format' => [
'type' => 'radio',
'name' => 'format',
'id' => 'format',
'label-message' => 'translate-export-form-format',
'flatlist' => true,
'options' => $this->getFormatOptions(),
'default' => $this->format,
],
];
HTMLForm::factory( 'ooui', $fields, $this->getContext() )
->setMethod( 'get' )
->setId( 'mw-export-message-group-form' )
->setWrapperLegendMsg( 'translate-page-settings-legend' )
->setSubmitTextMsg( 'translate-submit' )
->prepareForm()
->displayForm( false );
}
private function getGroupOptions(): array {
$groups = MessageGroups::getAllGroups();
uasort( $groups, [ MessageGroups::class, 'groupLabelSort' ] );
$options = [];
foreach ( $groups as $id => $group ) {
if ( !$group->exists() ) {
continue;
}
$options[$group->getLabel()] = $id;
}
return $options;
}
/** @return string[] */
private function getLanguageOptions(): array {
$languages = Utilities::getLanguageNames( 'en' );
$options = [];
foreach ( $languages as $code => $name ) {
$options["$code - $name"] = $code;
}
return $options;
}
/** @return string[] */
private function getFormatOptions(): array {
$options = [];
foreach ( self::VALID_FORMATS as $format ) {
// translate-taskui-export-to-file, translate-taskui-export-as-po
$options[ $this->msg( "translate-taskui-$format" )->escaped() ] = $format;
}
return $options;
}
private function checkInput(): Status {
$status = Status::newGood();
$msgGroup = MessageGroups::getGroup( $this->groupId );
if ( $msgGroup === null ) {
$status->fatal( 'translate-page-no-such-group' );
} elseif ( MessageGroups::isDynamic( $msgGroup ) ) {
$status->fatal( 'translate-export-not-supported' );
}
$langNames = Utilities::getLanguageNames( 'en' );
if ( !isset( $langNames[$this->language] ) ) {
$status->fatal( 'translate-page-no-such-language' );
}
// Do not show this error if invalid format is specified for translatable page
// groups as we can show a textarea box containing the translation page text
// (however it's not currently supported for other groups).
if (
!$msgGroup instanceof WikiPageMessageGroup
&& $this->format
&& !in_array( $this->format, self::VALID_FORMATS )
) {
$status->fatal( 'translate-export-invalid-format' );
}
if ( $this->format === 'export-to-file'
&& !$msgGroup instanceof FileBasedMessageGroup
) {
$status->fatal( 'translate-export-format-notsupported' );
}
if ( $msgGroup && !MessageGroups::isDynamic( $msgGroup ) ) {
$size = count( $msgGroup->getKeys() );
if ( $size > self::MAX_EXPORT_SIZE ) {
$status->fatal(
'translate-export-group-too-large',
Message::numParam( self::MAX_EXPORT_SIZE )
);
}
}
return $status;
}
private function doExport(): Status {
$out = $this->getOutput();
$group = MessageGroups::getGroup( $this->groupId );
$collection = $this->setupCollection( $group );
switch ( $this->format ) {
case 'export-as-po':
$out->disable();
$fileFormat = null;
if ( $group instanceof FileBasedMessageGroup ) {
$fileFormat = $group->getFFS();
}
if ( !$fileFormat instanceof GettextFormat ) {
if ( !$group instanceof FileBasedMessageGroup ) {
$group = FileBasedMessageGroup::newFromMessageGroup( $group );
}
$fileFormat = new GettextFormat( $group );
}
$fileFormat->setOfflineMode( true );
$filename = "{$group->getId()}_{$this->language}.po";
$this->sendExportHeaders( $filename );
echo $fileFormat->writeIntoVariable( $collection );
break;
case 'export-to-file':
// This will never happen since its checked previously but add the check to keep
// phan and IDE happy. See checkInput method
if ( !$group instanceof FileBasedMessageGroup ) {
throw new LogicException(
"'export-to-file' requested for a non FileBasedMessageGroup {$group->getId()}"
);
}
$messages = $group->getFFS()->writeIntoVariable( $collection );
if ( $messages === '' ) {
return Status::newFatal( 'translate-export-format-file-empty' );
}
$out->disable();
$filename = basename( $group->getSourceFilePath( $collection->getLanguage() ) );
$this->sendExportHeaders( $filename );
echo $messages;
break;
case 'export-as-csv':
$out->disable();
$filename = "{$group->getId()}_{$this->language}.csv";
$this->sendExportHeaders( $filename );
$this->exportCSV( $collection, $group->getSourceLanguage() );
break;
default:
// @todo Add web viewing for groups other than WikiPageMessageGroup
if ( !$group instanceof WikiPageMessageGroup ) {
return Status::newFatal( 'translate-export-format-notsupported' );
}
$translatablePage = TranslatablePage::newFromTitle( $group->getTitle() );
$translationPage = $translatablePage->getTranslationPage( $collection->getLanguage() );
$translationPage->filterMessageCollection( $collection );
$text = $translationPage->generateSourceFromMessageCollection(
$this->parserFactory->getInstance(),
$collection
);
$displayTitle = $translatablePage->getPageDisplayTitle( $this->language );
if ( $displayTitle ) {
$text = "{{DISPLAYTITLE:$displayTitle}}$text";
}
$box = Html::element(
'textarea',
[ 'id' => 'wpTextbox', 'rows' => 40, ],
$text
);
$out->addHTML( $box );
}
return Status::newGood();
}
private function setupCollection( MessageGroup $group ): MessageCollection {
$collection = $group->initCollection( $this->language );
// Don't export ignored, unless it is the source language or message documentation
$translateDocCode = $this->getConfig()->get( 'TranslateDocumentationLanguageCode' );
if ( $this->language !== $translateDocCode
&& $this->language !== $group->getSourceLanguage()
) {
$collection->filter( MessageCollection::FILTER_IGNORED, MessageCollection::EXCLUDE_MATCHING );
}
$collection->loadTranslations();
return $collection;
}
/** Send the appropriate response headers for the export */
private function sendExportHeaders( string $fileName ): void {
$response = $this->getRequest()->response();
$response->header( 'Content-Type: text/plain; charset=UTF-8' );
$response->header( "Content-Disposition: attachment; filename=\"$fileName\"" );
}
private function exportCSV( MessageCollection $collection, string $sourceLanguageCode ): void {
$fp = fopen( 'php://output', 'w' );
$exportingSourceLanguage = $sourceLanguageCode === $this->language;
$header = [
$this->msg( 'translate-export-csv-message-title' )->text(),
$this->msg( 'translate-export-csv-definition' )->text()
];
if ( !$exportingSourceLanguage ) {
$header[] = $this->language;
}
fputcsv( $fp, $header, ',', '"', "\\" );
foreach ( $collection->keys() as $messageKey => $titleValue ) {
$message = $collection[ $messageKey ];
$prefixedTitleText = $this->titleFormatter->getPrefixedText( $titleValue );
$handle = new MessageHandle( Title::newFromText( $prefixedTitleText ) );
$sourceLanguageTitle = $handle->getTitleForLanguage( $sourceLanguageCode );
$row = [ $sourceLanguageTitle->getPrefixedText(), $message->definition() ];
if ( !$exportingSourceLanguage ) {
$row[] = $message->translation();
}
fputcsv( $fp, $row, ',', '"', "\\" );
}
fclose( $fp );
}
protected function getGroupName(): string {
return 'translation';
}
}