<?php
/**
 * Contains logic for special page Special:ImportTranslations.
 *
 * @file
 * @author Niklas Laxström
 * @author Siebrand Mazeland
 * @license GPL-2.0-or-later
 */

/**
 * A special page for marking revisions of pages for translation.
 *
 * This page is the main tool for translation administrators in the wiki.
 * It will list all pages in their various states and provides actions
 * that are suitable for given translatable page.
 *
 * @ingroup SpecialPage PageTranslation
 */
class SpecialPageTranslation extends SpecialPage {
	public function __construct() {
		parent::__construct( 'PageTranslation' );
	}

	public function doesWrites() {
		return true;
	}

	protected function getGroupName() {
		return 'pagetools';
	}

	public function execute( $parameters ) {
		$this->setHeaders();

		$user = $this->getUser();
		$request = $this->getRequest();

		$target = $request->getText( 'target', $parameters );
		$revision = $request->getInt( 'revision', 0 );
		$action = $request->getVal( 'do' );
		$out = $this->getOutput();
		$out->addModules( 'ext.translate.special.pagetranslation' );
		$out->addHelpLink( 'Help:Extension:Translate/Page_translation_example' );

		if ( $target === '' ) {
			$this->listPages();

			return;
		}

		// Anything else than listing the pages need permissions
		if ( !$user->isAllowed( 'pagetranslation' ) ) {
			throw new PermissionsError( 'pagetranslation' );
		}

		$title = Title::newFromText( $target );
		if ( !$title ) {
			$out->addWikiMsg( 'tpt-badtitle' );

			return;
		} elseif ( !$title->exists() ) {
			$out->addWikiMsg( 'tpt-nosuchpage', $title->getPrefixedText() );

			return;
		}

		// Check token for all POST actions here
		if ( $request->wasPosted() && !$user->matchEditToken( $request->getText( 'token' ) ) ) {
			throw new PermissionsError( 'pagetranslation' );
		}

		if ( $action === 'mark' ) {
			// Has separate form
			$this->onActionMark( $title, $revision );

			return;
		}

		// On GET requests, show form which has token
		if ( !$request->wasPosted() ) {
			if ( $action === 'unlink' ) {
				$this->showUnlinkConfirmation( $title, $target );
			} else {
				$params = [
					'do' => $action,
					'target' => $title->getPrefixedText(),
					'revision' => $revision
				];
				$this->showGenericConfirmation( $params );
			}

			return;
		}

		if ( $action === 'discourage' || $action === 'encourage' ) {
			$id = TranslatablePage::getMessageGroupIdFromTitle( $title );
			$current = MessageGroups::getPriority( $id );

			if ( $action === 'encourage' ) {
				$new = '';
			} else {
				$new = 'discouraged';
			}

			if ( $new !== $current ) {
				MessageGroups::setPriority( $id, $new );
				$entry = new ManualLogEntry( 'pagetranslation', $action );
				$entry->setPerformer( $user );
				$entry->setTarget( $title );
				$logid = $entry->insert();
				$entry->publish( $logid );
			}

			$this->listPages();

			$group = MessageGroups::getGroup( $id );
			$parents = MessageGroups::getSharedGroups( $group );
			MessageGroupStats::clearGroup( $parents );

			return;
		}

		if ( $action === 'unlink' ) {
			$page = TranslatablePage::newFromTitle( $title );
			$content = ContentHandler::makeContent(
				self::getStrippedSourcePageText( $page->getParse() ),
				$title
			);

			$status = WikiPage::factory( $title )->doEditContent(
				$content,
				$this->msg( 'tpt-unlink-summary' )->inContentLanguage()->text(),
				EDIT_FORCE_BOT | EDIT_UPDATE
			);

			if ( !$status->isOK() ) {
				$out->wrapWikiMsg(
					'<div class="errorbox">$1</div>',
					[ 'tpt-edit-failed', $status->getWikiText() ]
				);

				return;
			}

			$page = TranslatablePage::newFromTitle( $title );
			$this->unmarkPage( $page, $user );
			$out->wrapWikiMsg(
				'<div class="successbox">$1</div>',
				[ 'tpt-unmarked', $title->getPrefixedText() ]
			);
			$this->listPages();

			return;
		}

		if ( $action === 'unmark' ) {
			$page = TranslatablePage::newFromTitle( $title );
			$this->unmarkPage( $page, $user );
			$out->wrapWikiMsg(
				'<div class="successbox">$1</div>',
				[ 'tpt-unmarked', $title->getPrefixedText() ]
			);
			$this->listPages();

			return;
		}
	}

	protected function onActionMark( Title $title, $revision ) {
		$request = $this->getRequest();
		$out = $this->getOutput();

		$out->addModuleStyles( 'ext.translate.special.pagetranslation.styles' );

		if ( $revision === 0 ) {
			// Get the latest revision
			$revision = (int)$title->getLatestRevID();
		}

		$page = TranslatablePage::newFromRevision( $title, $revision );
		if ( !$page instanceof TranslatablePage ) {
			$out->wrapWikiMsg(
				'<div class="errorbox">$1</div>',
				[ 'tpt-notsuitable', $title->getPrefixedText(), $revision ]
			);

			return;
		}

		if ( $revision !== (int)$title->getLatestRevID() ) {
			// We do want to notify the reviewer if the underlying page changes during review
			$target = $title->getFullURL( [ 'oldid' => $revision ] );
			$link = "<span class='plainlinks'>[$target $revision]</span>";
			$out->wrapWikiMsg(
				'<div class="warningbox">$1</div>',
				[ 'tpt-oldrevision', $title->getPrefixedText(), $link ]
			);
			$this->listPages();

			return;
		}

		$lastRev = $page->getMarkedTag();
		$firstMark = $lastRev === false;
		if ( !$firstMark && $lastRev === $revision ) {
			$out->wrapWikiMsg(
				'<div class="warningbox">$1</div>',
				[ 'tpt-already-marked' ]
			);
			$this->listPages();

			return;
		}

		// This will modify the sections to include name property
		$error = false;
		$sections = $this->checkInput( $page, $error );

		// Non-fatal error which prevents saving
		if ( $error === false && $request->wasPosted() ) {
			// Check if user wants to translate title
			// If not, remove it from the list of sections
			if ( !$request->getCheck( 'translatetitle' ) ) {
				$sections = array_filter( $sections, function ( $s ) {
					return $s->id !== 'Page display title';
				} );
			}

			$err = $this->markForTranslation( $page, $sections );

			if ( $err ) {
				call_user_func_array( [ $out, 'addWikiMsg' ], $err );
			} else {
				$this->showSuccess( $page, $firstMark );
				$this->listPages();
			}

			return;
		}

		$this->showPage( $page, $sections );
	}

	/**
	 * Displays success message and other instructions after a page has been marked for translation.
	 * @param TranslatablePage $page
	 * @param bool $firstMark true if it is the first time the page is being marked for translation.
	 */
	public function showSuccess( TranslatablePage $page, $firstMark = false ) {
		$titleText = $page->getTitle()->getPrefixedText();
		$num = $this->getLanguage()->formatNum( $page->getParse()->countSections() );
		$link = SpecialPage::getTitleFor( 'Translate' )->getFullURL( [
			'group' => $page->getMessageGroupId(),
			'action' => 'page',
			'filter' => '',
		] );

		$this->getOutput()->wrapWikiMsg(
			'<div class="successbox">$1</div>',
			[ 'tpt-saveok', $titleText, $num, $link ]
		);

		// If the page is being marked for translation for the first time
		// add a link to Special:PageMigration.
		if ( $firstMark ) {
			$this->getOutput()->addWikiMsg( 'tpt-saveok-first' );
		}

		// If TranslationNotifications is installed, and the user can notify
		// translators, add a convenience link.
		if ( method_exists( 'SpecialNotifyTranslators', 'execute' ) &&
			$this->getUser()->isAllowed( SpecialNotifyTranslators::$right )
		) {
			$link = SpecialPage::getTitleFor( 'NotifyTranslators' )->getFullURL(
				[ 'tpage' => $page->getTitle()->getArticleID() ] );
			$this->getOutput()->addWikiMsg( 'tpt-offer-notify', $link );
		}
	}

	protected function showGenericConfirmation( array $params ) {
		$formParams = [
			'method' => 'post',
			'action' => $this->getPageTitle()->getFullURL(),
		];

		$params['title'] = $this->getPageTitle()->getPrefixedText();
		$params['token'] = $this->getUser()->getEditToken();

		$hidden = '';
		foreach ( $params as $key => $value ) {
			$hidden .= Html::hidden( $key, $value );
		}

		$this->getOutput()->addHTML(
			Html::openElement( 'form', $formParams ) .
			$hidden .
			$this->msg( 'tpt-generic-confirm' )->parseAsBlock() .
			Xml::submitButton(
				$this->msg( 'tpt-generic-button' )->text(),
				[ 'class' => 'mw-ui-button mw-ui-progressive' ]
			) .
			Html::closeElement( 'form' )
		);
	}

	protected function showUnlinkConfirmation( Title $target ) {
		$formParams = [
			'method' => 'post',
			'action' => $this->getPageTitle()->getFullURL(),
		];

		$this->getOutput()->addHTML(
			Html::openElement( 'form', $formParams ) .
			Html::hidden( 'do', 'unlink' ) .
			Html::hidden( 'title', $this->getPageTitle()->getPrefixedText() ) .
			Html::hidden( 'target', $target->getPrefixedText() ) .
			Html::hidden( 'token', $this->getUser()->getEditToken() ) .
			$this->msg( 'tpt-unlink-confirm', $target->getPrefixedText() )->parseAsBlock() .
			Xml::submitButton(
				$this->msg( 'tpt-unlink-button' )->text(),
				[ 'class' => 'mw-ui-button mw-ui-destructive' ]
			) .
			Html::closeElement( 'form' )
		);
	}

	protected function unmarkPage( TranslatablePage $page, $user ) {
		$page->unmarkTranslatablePage();
		$page->getTitle()->invalidateCache();

		$entry = new ManualLogEntry( 'pagetranslation', 'unmark' );
		$entry->setPerformer( $user );
		$entry->setTarget( $page->getTitle() );
		$logid = $entry->insert();
		$entry->publish( $logid );
	}

	public function loadPagesFromDB() {
		$dbr = TranslateUtils::getSafeReadDB();
		$tables = [ 'page', 'revtag' ];
		$vars = [
			'page_id',
			'page_title',
			'page_namespace',
			'page_latest',
			'MAX(rt_revision) AS rt_revision',
			'rt_type'
		];
		$conds = [
			'page_id=rt_page',
			'rt_type' => [ RevTag::getType( 'tp:mark' ), RevTag::getType( 'tp:tag' ) ],
		];
		$options = [
			'ORDER BY' => 'page_namespace, page_title',
			'GROUP BY' => 'page_id, rt_type',
		];
		$res = $dbr->select( $tables, $vars, $conds, __METHOD__, $options );

		return $res;
	}

	protected function buildPageArray( /*db result*/$res ) {
		$pages = [];
		foreach ( $res as $r ) {
			// We have multiple rows for same page, because of different tags
			if ( !isset( $pages[$r->page_id] ) ) {
				$pages[$r->page_id] = [];
				$title = Title::newFromRow( $r );
				$pages[$r->page_id]['title'] = $title;
				$pages[$r->page_id]['latest'] = (int)$title->getLatestRevID();
			}

			$tag = RevTag::typeToTag( $r->rt_type );
			$pages[$r->page_id][$tag] = (int)$r->rt_revision;
		}

		return $pages;
	}

	/**
	 * @param array $in
	 * @return array
	 */
	protected function classifyPages( array $in ) {
		$out = [
			'proposed' => [],
			'active' => [],
			'broken' => [],
			'discouraged' => [],
		];

		foreach ( $in as $index => $page ) {
			if ( !isset( $page['tp:mark'] ) ) {
				// Never marked, check that the latest version is ready
				if ( $page['tp:tag'] === $page['latest'] ) {
					$out['proposed'][$index] = $page;
				} // Otherwise ignore such pages
			} elseif ( $page['tp:tag'] === $page['latest'] ) {
				// Marked and latest version if fine
				$out['active'][$index] = $page;
			} else {
				// Marked but latest version if not fine
				$out['broken'][$index] = $page;
			}
		}

		// broken and proposed take preference over discouraged status
		foreach ( $out['active'] as $index => $page ) {
			$id = TranslatablePage::getMessageGroupIdFromTitle( $page['title'] );
			$group = MessageGroups::getGroup( $id );
			if ( MessageGroups::getPriority( $group ) === 'discouraged' ) {
				$out['discouraged'][$index] = $page;
				unset( $out['active'][$index] );
			}
		}

		return $out;
	}

	public function listPages() {
		$out = $this->getOutput();

		$res = $this->loadPagesFromDB();
		$allPages = $this->buildPageArray( $res );
		if ( !count( $allPages ) ) {
			$out->addWikiMsg( 'tpt-list-nopages' );

			return;
		}

		$lb = new LinkBatch();
		$lb->setCaller( __METHOD__ );
		foreach ( $allPages as $page ) {
			$lb->addObj( $page['title'] );
		}
		$lb->execute();

		$types = $this->classifyPages( $allPages );

		$pages = $types['proposed'];
		if ( count( $pages ) ) {
			$out->wrapWikiMsg( '== $1 ==', 'tpt-new-pages-title' );
			$out->addWikiMsg( 'tpt-new-pages', count( $pages ) );
			$out->addHTML( '<ol>' );
			foreach ( $pages as $page ) {
				$link = Linker::link( $page['title'] );
				$acts = $this->actionLinks( $page, 'proposed' );
				$out->addHTML( "<li>$link $acts</li>" );
			}
			$out->addHTML( '</ol>' );
		}

		$pages = $types['active'];
		if ( count( $pages ) ) {
			$out->wrapWikiMsg( '== $1 ==', 'tpt-old-pages-title' );
			$out->addWikiMsg( 'tpt-old-pages', count( $pages ) );
			$out->addHTML( '<ol>' );
			foreach ( $pages as $page ) {
				$link = Linker::link( $page['title'] );
				if ( $page['tp:mark'] !== $page['tp:tag'] ) {
					$link = "<strong>$link</strong>";
				}

				$acts = $this->actionLinks( $page, 'active' );
				$out->addHTML( "<li>$link $acts</li>" );
			}
			$out->addHTML( '</ol>' );
		}

		$pages = $types['broken'];
		if ( count( $pages ) ) {
			$out->wrapWikiMsg( '== $1 ==', 'tpt-other-pages-title' );
			$out->addWikiMsg( 'tpt-other-pages', count( $pages ) );
			$out->addHTML( '<ol>' );
			foreach ( $pages as $page ) {
				$link = Linker::link( $page['title'] );
				$acts = $this->actionLinks( $page, 'broken' );
				$out->addHTML( "<li>$link $acts</li>" );
			}
			$out->addHTML( '</ol>' );
		}

		$pages = $types['discouraged'];
		if ( count( $pages ) ) {
			$out->wrapWikiMsg( '== $1 ==', 'tpt-discouraged-pages-title' );
			$out->addWikiMsg( 'tpt-discouraged-pages', count( $pages ) );
			$out->addHTML( '<ol>' );
			foreach ( $pages as $page ) {
				$link = Linker::link( $page['title'] );
				if ( $page['tp:mark'] !== $page['tp:tag'] ) {
					$link = "<strong>$link</strong>";
				}

				$acts = $this->actionLinks( $page, 'discouraged' );
				$out->addHTML( "<li>$link $acts</li>" );
			}
			$out->addHTML( '</ol>' );
		}
	}

	/**
	 * @param array $page
	 * @param string $type
	 * @return string
	 */
	protected function actionLinks( array $page, $type ) {
		$actions = [];
		/**
		 * @var Title $title
		 */
		$title = $page['title'];
		$user = $this->getUser();

		// Class to allow one-click POSTs
		$js = [ 'class' => 'mw-translate-jspost' ];

		if ( $user->isAllowed( 'pagetranslation' ) ) {
			$pending = $type === 'active' && $page['latest'] !== $page['tp:mark'];
			if ( $type === 'proposed' || $pending ) {
				$actions[] = Linker::linkKnown(
					$this->getPageTitle(),
					$this->msg( 'tpt-rev-mark' )->escaped(),
					[ 'title' => $this->msg( 'tpt-rev-mark-tooltip' )->text() ],
					[
						'do' => 'mark',
						'target' => $title->getPrefixedText(),
						'revision' => $title->getLatestRevID(),
					]
				);
			}

			if ( $type === 'active' ) {
				$actions[] = Linker::linkKnown(
					$this->getPageTitle(),
					$this->msg( 'tpt-rev-discourage' )->escaped(),
					[ 'title' => $this->msg( 'tpt-rev-discourage-tooltip' )->text() ] + $js,
					[
						'do' => 'discourage',
						'target' => $title->getPrefixedText(),
						'revision' => -1,
					]
				);
			} elseif ( $type === 'discouraged' ) {
				$actions[] = Linker::linkKnown(
					$this->getPageTitle(),
					$this->msg( 'tpt-rev-encourage' )->escaped(),
					[ 'title' => $this->msg( 'tpt-rev-encourage-tooltip' )->text() ] + $js,
					[
						'do' => 'encourage',
						'target' => $title->getPrefixedText(),
						'revision' => -1,
					]
				);
			}

			if ( $type !== 'proposed' ) {
				$actions[] = Linker::linkKnown(
					$this->getPageTitle(),
					$this->msg( 'tpt-rev-unmark' )->escaped(),
					[ 'title' => $this->msg( 'tpt-rev-unmark-tooltip' )->text() ],
					[
						'do' => $type === 'broken' ? 'unmark' : 'unlink',
						'target' => $title->getPrefixedText(),
						'revision' => -1,
					]
				);
			}
		}

		if ( !count( $actions ) ) {
			return '';
		}

		$flattened = $this->getLanguage()->semicolonList( $actions );

		return Html::rawElement(
			'span',
			[ 'class' => 'mw-tpt-actions' ],
			$this->msg( 'parentheses' )->rawParams( $flattened )->escaped()
		);
	}

	/**
	 * @param TranslatablePage $page
	 * @param bool &$error
	 * @return TPSection[] The array has string keys.
	 */
	public function checkInput( TranslatablePage $page, &$error ) {
		$usedNames = [];
		$highest = (int)TranslateMetadata::get( $page->getMessageGroupId(), 'maxid' );
		$parse = $page->getParse();
		$sections = $parse->getSectionsForSave( $highest );

		foreach ( $sections as $s ) {
			// We need to do checks for both new and existing sections.
			// Someone might have tampered with the page source adding
			// duplicate or invalid markers.
			if ( isset( $usedNames[$s->id] ) ) {
				$this->getOutput()->addWikiMsg( 'tpt-duplicate', $s->id );
				$error = true;
			}
			$usedNames[$s->id] = true;
			$s->name = $s->id;
		}

		return $sections;
	}

	/**
	 * Displays the sections and changes for the user to review
	 * @param TranslatablePage $page
	 * @param TPSection[] $sections
	 */
	public function showPage( TranslatablePage $page, array $sections ) {
		$out = $this->getOutput();

		$out->setSubtitle( Linker::link( $page->getTitle() ) );

		$out->addWikiMsg( 'tpt-showpage-intro' );

		$formParams = [
			'method' => 'post',
			'action' => $this->getPageTitle()->getFullURL(),
			'class' => 'mw-tpt-sp-markform',
		];

		$out->addHTML(
			Xml::openElement( 'form', $formParams ) .
			Html::hidden( 'do', 'mark' ) .
			Html::hidden( 'title', $this->getPageTitle()->getPrefixedText() ) .
			Html::hidden( 'revision', $page->getRevision() ) .
			Html::hidden( 'target', $page->getTitle()->getPrefixedText() ) .
			Html::hidden( 'token', $this->getUser()->getEditToken() )
		);

		$out->wrapWikiMsg( '==$1==', 'tpt-sections-oldnew' );

		$diffOld = $this->msg( 'tpt-diff-old' )->escaped();
		$diffNew = $this->msg( 'tpt-diff-new' )->escaped();
		$hasChanges = false;

		// Check whether page title was previously marked for translation.
		// If the page is marked for translation the first time, default to checked.
		$defaultChecked = $page->hasPageDisplayTitle();

		$sourceLanguage = Language::factory( $page->getSourceLanguageCode() );

		foreach ( $sections as $s ) {
			if ( $s->name === 'Page display title' ) {
				// Set section type as new if title previously unchecked
				$s->type = $defaultChecked ? $s->type : 'new';

				// Checkbox for page title optional translation
				$this->getOutput()->addHTML( Xml::checkLabel(
					$this->msg( 'tpt-translate-title' )->text(),
					'translatetitle',
					'mw-translate-title',
					$defaultChecked
				) );
			}

			if ( $s->type === 'new' ) {
				$hasChanges = true;
				$name = $this->msg( 'tpt-section-new', $s->name )->escaped();
			} else {
				$name = $this->msg( 'tpt-section', $s->name )->escaped();
			}

			if ( $s->type === 'changed' ) {
				$hasChanges = true;
				$diff = new DifferenceEngine;
				$diff->setTextLanguage( $sourceLanguage );
				$diff->setReducedLineNumbers();

				$oldContent = ContentHandler::makeContent( $s->getOldText(), $diff->getTitle() );
				$newContent = ContentHandler::makeContent( $s->getText(), $diff->getTitle() );

				$diff->setContent( $oldContent, $newContent );

				$text = $diff->getDiff( $diffOld, $diffNew );
				$diffOld = $diffNew = null;
				$diff->showDiffStyle();

				$id = "tpt-sect-{$s->id}-action-nofuzzy";
				$checkLabel = Xml::checkLabel(
					$this->msg( 'tpt-action-nofuzzy' )->text(),
					$id,
					$id,
					false
				);
				$text = $checkLabel . $text;
			} else {
				$text = TranslateUtils::convertWhiteSpaceToHTML( $s->getText() );
			}

			# For changed text, the language is set by $diff->setTextLanguage()
			$lang = $s->type === 'changed' ? null : $sourceLanguage;
			$out->addHTML( MessageWebImporter::makeSectionElement(
				$name,
				$s->type,
				$text,
				$lang
			) );
		}

		$deletedSections = $page->getParse()->getDeletedSections();
		if ( count( $deletedSections ) ) {
			$hasChanges = true;
			$out->wrapWikiMsg( '==$1==', 'tpt-sections-deleted' );

			/**
			 * @var TPSection $s
			 */
			foreach ( $deletedSections as $s ) {
				$name = $this->msg( 'tpt-section-deleted', $s->id )->escaped();
				$text = TranslateUtils::convertWhiteSpaceToHTML( $s->getText() );
				$out->addHTML( MessageWebImporter::makeSectionElement(
					$name,
					$s->type,
					$text,
					$sourceLanguage
				) );
			}
		}

		// Display template changes if applicable
		if ( $page->getMarkedTag() !== false ) {
			$hasChanges = true;
			$newTemplate = $page->getParse()->getTemplatePretty();
			$oldPage = TranslatablePage::newFromRevision(
				$page->getTitle(),
				$page->getMarkedTag()
			);
			$oldTemplate = $oldPage->getParse()->getTemplatePretty();

			if ( $oldTemplate !== $newTemplate ) {
				$out->wrapWikiMsg( '==$1==', 'tpt-sections-template' );

				$diff = new DifferenceEngine;
				$diff->setTextLanguage( $sourceLanguage );

				$oldContent = ContentHandler::makeContent( $oldTemplate, $diff->getTitle() );
				$newContent = ContentHandler::makeContent( $newTemplate, $diff->getTitle() );

				$diff->setContent( $oldContent, $newContent );

				$text = $diff->getDiff(
					$this->msg( 'tpt-diff-old' )->escaped(),
					$this->msg( 'tpt-diff-new' )->escaped()
				);
				$diff->showDiffStyle();
				$diff->setReducedLineNumbers();

				$contentParams = [ 'class' => 'mw-tpt-sp-content' ];
				$out->addHTML( Xml::tags( 'div', $contentParams, $text ) );
			}
		}

		if ( !$hasChanges ) {
			$out->wrapWikiMsg( '<div class="successbox">$1</div>', 'tpt-mark-nochanges' );
		}

		$this->priorityLanguagesForm( $page );

		$out->addHTML(
			Xml::submitButton( $this->msg( 'tpt-submit' )->text() ) .
			Xml::closeElement( 'form' )
		);
	}

	/**
	 * @param TranslatablePage $page
	 */
	protected function priorityLanguagesForm( TranslatablePage $page ) {
		global $wgContLang;

		$groupId = $page->getMessageGroupId();
		$this->getOutput()->wrapWikiMsg( '==$1==', 'tpt-sections-prioritylangs' );

		$langSelector = Xml::languageSelector(
			$wgContLang->getCode(),
			false,
			$this->getLanguage()->getCode()
		);

		$hLangs = Xml::inputLabelSep(
			$this->msg( 'tpt-select-prioritylangs' )->text(),
			'prioritylangs', // name
			'tpt-prioritylangs', // id
			50,
			TranslateMetadata::get( $groupId, 'prioritylangs' )
		);

		$hForce = Xml::checkLabel(
			$this->msg( 'tpt-select-prioritylangs-force' )->text(),
			'forcelimit', // name
			'tpt-priority-forcelimit', // id
			TranslateMetadata::get( $groupId, 'priorityforce' ) === 'on'
		);

		$hReason = Xml::inputLabelSep(
			$this->msg( 'tpt-select-prioritylangs-reason' )->text(),
			'priorityreason', // name
			'tpt-priority-reason', // id
			50, // size
			TranslateMetadata::get( $groupId, 'priorityreason' )
		);

		$this->getOutput()->addHTML(
			'<table>' .
			'<tr>' .
			"<td class='mw-label'>$hLangs[0]</td>" .
			"<td class='mw-input'>$hLangs[1]$langSelector[1]</td>" .
			'</tr>' .
			"<tr><td></td><td class='mw-inout'>$hForce</td></tr>" .
			'<tr>' .
			"<td class='mw-label'>$hReason[0]</td>" .
			"<td class='mw-input'>$hReason[1]</td>" .
			'</tr>' .
			'</table>'
		);
	}

	/**
	 * This function does the heavy duty of marking a page.
	 * - Updates the source page with section markers.
	 * - Updates translate_sections table
	 * - Updates revtags table
	 * - Setups renderjobs to update the translation pages
	 * - Invalidates caches
	 * @param TranslatablePage $page
	 * @param TPSection[] $sections
	 * @return array|bool
	 */
	public function markForTranslation( TranslatablePage $page, array $sections ) {
		// Add the section markers to the source page
		$wikiPage = WikiPage::factory( $page->getTitle() );
		$content = ContentHandler::makeContent(
			$page->getParse()->getSourcePageText(),
			$page->getTitle()
		);

		$status = $wikiPage->doEditContent(
			$content,
			$this->msg( 'tpt-mark-summary' )->inContentLanguage()->text(),
			EDIT_FORCE_BOT | EDIT_UPDATE
		);

		if ( !$status->isOK() ) {
			return [ 'tpt-edit-failed', $status->getWikiText() ];
		}

		$newrevision = $status->value['revision'];

		// In theory it is either null or Revision object,
		// never revision object with null id, but who knows
		if ( $newrevision instanceof Revision ) {
			$newrevision = $newrevision->getId();
		}

		if ( $newrevision === null ) {
			// Probably a no-change edit, so no new revision was assigned.
			// Get the latest revision manually
			$newrevision = $page->getTitle()->getLatestRevID();
		}

		$inserts = [];
		$changed = [];
		$maxid = (int)TranslateMetadata::get( $page->getMessageGroupId(), 'maxid' );

		$pageId = $page->getTitle()->getArticleID();
		/**
		 * @var TPSection $s
		 */
		foreach ( array_values( $sections ) as $index => $s ) {
			$maxid = max( $maxid, (int)$s->name );
			$changed[] = $s->name;

			if ( $this->getRequest()->getCheck( "tpt-sect-{$s->id}-action-nofuzzy" ) ) {
				// TranslationsUpdateJob will only fuzzy when type is changed
				$s->type = 'old';
			}

			$inserts[] = [
				'trs_page' => $pageId,
				'trs_key' => $s->name,
				'trs_text' => $s->getText(),
				'trs_order' => $index
			];
		}

		$dbw = wfGetDB( DB_MASTER );
		$dbw->delete(
			'translate_sections',
			[ 'trs_page' => $page->getTitle()->getArticleID() ],
			__METHOD__
		);
		$dbw->insert( 'translate_sections', $inserts, __METHOD__ );
		TranslateMetadata::set( $page->getMessageGroupId(), 'maxid', $maxid );

		$page->addMarkedTag( $newrevision );
		MessageGroups::singleton()->recache();

		$job = TranslationsUpdateJob::newFromPage( $page, $sections );
		JobQueueGroup::singleton()->push( $job );

		// Logging
		$this->handlePriorityLanguages( $this->getRequest(), $page );

		$entry = new ManualLogEntry( 'pagetranslation', 'mark' );
		$entry->setPerformer( $this->getUser() );
		$entry->setTarget( $page->getTitle() );
		$entry->setParameters( [
			'revision' => $newrevision,
			'changed' => count( $changed ),
		] );
		$logid = $entry->insert();
		$entry->publish( $logid );

		// Clear more caches
		$page->getTitle()->invalidateCache();

		return false;
	}

	/**
	 * @param WebRequest $request
	 * @param TranslatablePage $page
	 */
	protected function handlePriorityLanguages( WebRequest $request, TranslatablePage $page ) {
		// new priority languages
		$npLangs = rtrim( trim( $request->getVal( 'prioritylangs' ) ), ',' );
		$npForce = $request->getCheck( 'forcelimit' ) ? 'on' : 'off';
		$npReason = trim( $request->getText( 'priorityreason' ) );

		// Normalize
		$npLangs = array_map( 'trim', explode( ',', $npLangs ) );
		$npLangs = array_unique( $npLangs );
		// Remove invalid language codes.
		$languages = Language::fetchLanguageNames();
		foreach ( $npLangs as $index => $language ) {
			if ( !array_key_exists( $language, $languages ) ) {
				unset( $npLangs[$index] );
			}
		}
		$npLangs = implode( ',', $npLangs );
		if ( $npLangs === '' ) {
			$npLangs = false;
			$npForce = false;
			$npReason = false;
		}

		$groupId = $page->getMessageGroupId();
		// old priority languages
		$opLangs = TranslateMetadata::get( $groupId, 'prioritylangs' );
		$opForce = TranslateMetadata::get( $groupId, 'priorityforce' );
		$opReason = TranslateMetadata::get( $groupId, 'priorityreason' );

		TranslateMetadata::set( $groupId, 'prioritylangs', $npLangs );
		TranslateMetadata::set( $groupId, 'priorityforce', $npForce );
		TranslateMetadata::set( $groupId, 'priorityreason', $npReason );

		if ( $opLangs !== $npLangs || $opForce !== $npForce || $opReason !== $npReason ) {
			$params = [
				'languages' => $npLangs,
				'force' => $npForce,
				'reason' => $npReason,
			];

			$entry = new ManualLogEntry( 'pagetranslation', 'prioritylanguages' );
			$entry->setPerformer( $this->getUser() );
			$entry->setTarget( $page->getTitle() );
			$entry->setParameters( $params );
			$entry->setComment( $npReason );
			$logid = $entry->insert();
			$entry->publish( $logid );
		}
	}

	/**
	 * Returns the source page without any translation markup.
	 *
	 * @param TPParse $parse
	 * @return string
	 * @since 2014.09
	 */
	public static function getStrippedSourcePageText( TPParse $parse ) {
		$text = $parse->getTranslationPageText( [] );
		$text = preg_replace( '~<languages\s*/>\n?~s', '', $text );
		return $text;
	}
}
$hLangs[0]	$hLangs[1]$langSelector[1]
	$hForce
$hReason[0]	$hReason[1]