mirror of
https://gerrit.wikimedia.org/r/mediawiki/extensions/Echo
synced 2024-12-11 15:38:37 +00:00
e146e29c81
Comments has been duplicating these methods for quite some time for no real reason other than that they're private here. Duplicating these methods appears to be necessary if and when working with extensions where users can be @mentioned but which are not implemented as ContentHandler subclasses or otherwise related to regular wikitext pages. Change-Id: I9c097bab9c5eed8f2399c86897b1f8968126c765
1283 lines
39 KiB
PHP
1283 lines
39 KiB
PHP
<?php
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use MediaWiki\MediaWikiServices;
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use MediaWiki\Revision\RevisionRecord;
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use MediaWiki\Revision\SlotRecord;
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use MediaWiki\User\UserNameUtils;
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abstract class EchoDiscussionParser {
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private const HEADER_REGEX = '^(==+)\h*([^=].*)\h*\1$';
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public const DEFAULT_SNIPPET_LENGTH = 150;
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/** @var string|null */
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protected static $timestampRegex;
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/** @var array[][] */
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protected static $revisionInterpretationCache = [];
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/** @var EchoDiffParser|null */
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protected static $diffParser;
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/**
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* Given a RevisionRecord object, generates EchoEvent objects for
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* the discussion-related actions that occurred in that Revision.
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*
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* @param RevisionRecord $revision
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* @param bool $isRevert
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*/
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public static function generateEventsForRevision( RevisionRecord $revision, $isRevert ) {
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global $wgEchoMentionsOnMultipleSectionEdits;
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global $wgEchoMentionOnChanges;
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$store = MediaWikiServices::getInstance()->getRevisionStore();
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// use replica database if there is a previous revision
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if ( $store->getPreviousRevision( $revision ) ) {
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$title = Title::newFromID( $revision->getPageId() );
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// use master database for new page
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} else {
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$title = Title::newFromID( $revision->getPageId(), Title::GAID_FOR_UPDATE );
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}
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// not a valid title
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if ( !$title ) {
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return;
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}
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$events = [];
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$interpretation = self::getChangeInterpretationForRevision( $revision );
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$userID = $revision->getUser()->getId();
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$userName = $revision->getUser()->getName();
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$user = $userID !== 0 ? User::newFromId( $userID ) : User::newFromName( $userName, false );
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foreach ( $interpretation as $action ) {
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if ( $action['type'] === 'add-comment' ) {
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$fullSection = $action['full-section'];
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$header = self::extractHeader( $fullSection );
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$userLinks = self::getUserLinks( $action['content'], $title );
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$events = array_merge(
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$events,
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self::collectMentionEvents( $header, $userLinks, $action['content'], $revision, $user )
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);
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} elseif ( $action['type'] === 'new-section-with-comment' ) {
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$content = $action['content'];
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$header = self::extractHeader( $content );
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$userLinks = self::getUserLinks( $content, $title );
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$events = array_merge(
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$events,
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self::collectMentionEvents( $header, $userLinks, $content, $revision, $user )
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);
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} elseif ( $action['type'] === 'add-section-multiple' && $wgEchoMentionsOnMultipleSectionEdits ) {
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$content = self::stripHeader( $action['content'] );
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$content = self::stripSignature( $content );
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$userLinks = self::getUserLinks( $content, $title );
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$events = array_merge(
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$events,
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self::collectMentionEvents( $action['header'], $userLinks, $content, $revision, $user )
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);
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} elseif ( $action['type'] === 'unknown-signed-change' ) {
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$userLinks = array_diff_key(
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self::getUserLinks( $action['new_content'], $title ),
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self::getUserLinks( $action['old_content'], $title )
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);
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$header = self::extractHeader( $action['full-section'] );
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if ( $wgEchoMentionOnChanges ) {
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$events = array_merge(
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$events,
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self::collectMentionEvents( $header, $userLinks, $action['new_content'], $revision, $user )
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);
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}
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}
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}
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if ( $title->getNamespace() === NS_USER_TALK ) {
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$notifyUser = User::newFromName( $title->getText() );
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// If the recipient is a valid non-anonymous user and hasn't turned
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// off their notifications, generate a talk page post Echo notification.
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if ( $notifyUser && $notifyUser->getId() ) {
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$permManager = MediaWikiServices::getInstance()->getPermissionManager();
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// If this is a minor edit, only notify if the agent doesn't have talk page minor
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// edit notification blocked
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if ( !$revision->isMinor() || !$permManager->userHasRight( $user, 'nominornewtalk' ) ) {
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$section = self::detectSectionTitleAndText( $interpretation, $title );
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if ( $section['section-text'] === '' ) {
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$comment = $revision->getComment( RevisionRecord::FOR_PUBLIC, $notifyUser );
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if ( $comment ) {
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$section['section-text'] = $comment->text;
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}
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}
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$events[] = [
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'type' => 'edit-user-talk',
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'title' => $title,
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'extra' => [
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'revid' => $revision->getId(),
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'minoredit' => $revision->isMinor(),
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'section-title' => $section['section-title'],
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'section-text' => $section['section-text'],
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'target-page' => $title->getArticleID(),
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],
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'agent' => $user,
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];
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}
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}
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}
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// Notify users mentioned in edit summary
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global $wgEchoMaxMentionsInEditSummary;
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if ( $wgEchoMaxMentionsInEditSummary > 0 && !$user->isBot() && !$isRevert ) {
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$summaryParser = new EchoSummaryParser();
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$usersInSummary = $summaryParser->parse( $revision->getComment()->text );
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// Don't allow pinging yourself
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unset( $usersInSummary[$userName] );
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$count = 0;
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$mentionedUsers = [];
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foreach ( $usersInSummary as $summaryUser ) {
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if ( $summaryUser->getTalkPage()->equals( $title ) ) {
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// Users already get a ping when their talk page is edited
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continue;
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}
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if ( $count >= $wgEchoMaxMentionsInEditSummary ) {
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break;
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}
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$mentionedUsers[$summaryUser->getId()] = $summaryUser->getId();
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$count++;
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}
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if ( $mentionedUsers ) {
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$events[] = [
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'type' => 'mention-summary',
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'title' => $title,
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'extra' => [
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'revid' => $revision->getId(),
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'mentioned-users' => $mentionedUsers,
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],
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'agent' => $user,
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];
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}
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}
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// Allow extensions to generate more events for a revision, and de-duplicate
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// against the standard events created above.
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Hooks::run( 'EchoGetEventsForRevision', [ &$events, $revision, $isRevert ] );
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// Create events
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foreach ( $events as $event ) {
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EchoEvent::create( $event );
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}
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}
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/**
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* Attempts to determine what section title the edit was performed under (if any)
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*
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* @param array[] $interpretation Results of {@see getChangeInterpretationForRevision}
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* @param Title|null $title
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* @return string[] Array containing section title and text
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*/
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public static function detectSectionTitleAndText( array $interpretation, Title $title = null ) {
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$header = $snippet = '';
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$found = false;
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foreach ( $interpretation as $action ) {
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switch ( $action['type'] ) {
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case 'add-comment':
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$header = self::extractHeader( $action['full-section'] );
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$snippet = self::getTextSnippet(
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self::stripSignature( self::stripHeader( $action['content'] ), $title ),
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RequestContext::getMain()->getLanguage(),
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self::DEFAULT_SNIPPET_LENGTH,
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$title );
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break;
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case 'new-section-with-comment':
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$header = self::extractHeader( $action['content'] );
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$snippet = self::getTextSnippet(
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self::stripSignature( self::stripHeader( $action['content'] ), $title ),
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RequestContext::getMain()->getLanguage(),
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self::DEFAULT_SNIPPET_LENGTH,
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$title );
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break;
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}
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if ( $header ) {
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// If we find a second header within the same change interpretation then
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// we cannot choose just 1 to link to
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if ( $found ) {
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$found = false;
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break;
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}
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$found = true;
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}
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}
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if ( $found === false ) {
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return [ 'section-title' => '', 'section-text' => '' ];
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}
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return [ 'section-title' => $header, 'section-text' => $snippet ];
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}
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/**
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* For an action taken on a talk page, notify users whose user pages
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* are linked.
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* @param string $header The subject line for the discussion.
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* @param int[] $userLinks
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* @param string $content The content of the post, as a wikitext string.
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* @param RevisionRecord $revision
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* @param User $agent The user who made the comment.
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*/
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public static function generateMentionEvents(
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$header,
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array $userLinks,
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$content,
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RevisionRecord $revision,
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User $agent
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) {
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$events = self::collectMentionEvents( $header, $userLinks, $content, $revision, $agent );
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foreach ( $events as $event ) {
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EchoEvent::create( $event );
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}
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}
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/**
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* Generate mention event data for a talk page action
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* @param string $header The subject line for the discussion.
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* @param int[] $userLinks
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* @param string $content The content of the post, as a wikitext string.
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* @param RevisionRecord $revision
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* @param User $agent The user who made the comment.
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* @return array List of event info arrays
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*/
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protected static function collectMentionEvents(
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$header,
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array $userLinks,
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$content,
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RevisionRecord $revision,
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User $agent
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) {
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global $wgEchoMaxMentionsCount, $wgEchoMentionStatusNotifications;
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$title = Title::newFromLinkTarget( $revision->getPageAsLinkTarget() );
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if ( !$title ) {
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return [];
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}
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$content = self::stripHeader( $content );
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$content = self::stripSignature( $content, $title );
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if ( !$userLinks ) {
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return [];
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}
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$userMentions = self::getUserMentions(
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$title, $revision->getUser( RevisionRecord::RAW )->getId(), $userLinks
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);
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$overallMentionsCount = self::getOverallUserMentionsCount( $userMentions );
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if ( $overallMentionsCount === 0 ) {
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return [];
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}
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$events = [];
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$stats = MediaWikiServices::getInstance()->getStatsdDataFactory();
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if ( $overallMentionsCount > $wgEchoMaxMentionsCount ) {
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if ( $wgEchoMentionStatusNotifications ) {
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$events[] = [
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'type' => 'mention-failure-too-many',
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'title' => $title,
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'extra' => [
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'max-mentions' => $wgEchoMaxMentionsCount,
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'section-title' => $header,
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],
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'agent' => $agent,
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];
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$stats->increment( 'echo.event.mention.notification.failure-too-many' );
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}
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return $events;
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}
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if ( $userMentions['validMentions'] ) {
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$events[] = [
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'type' => 'mention',
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'title' => $title,
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'extra' => [
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'content' => $content,
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'section-title' => $header,
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'revid' => $revision->getId(),
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'mentioned-users' => $userMentions['validMentions'],
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],
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'agent' => $agent,
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];
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}
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if ( $wgEchoMentionStatusNotifications ) {
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// TODO batch?
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foreach ( $userMentions['validMentions'] as $mentionedUserId ) {
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$events[] = [
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'type' => 'mention-success',
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'title' => $title,
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'extra' => [
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'subject-name' => User::newFromId( $mentionedUserId )->getName(),
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'section-title' => $header,
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'revid' => $revision->getId(),
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],
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'agent' => $agent,
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];
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$stats->increment( 'echo.event.mention.notification.success' );
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}
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// TODO batch?
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foreach ( $userMentions['anonymousUsers'] as $anonymousUser ) {
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$events[] = [
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'type' => 'mention-failure',
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'title' => $title,
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'extra' => [
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'failure-type' => 'user-anonymous',
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'subject-name' => $anonymousUser,
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'section-title' => $header,
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'revid' => $revision->getId(),
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],
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'agent' => $agent,
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];
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$stats->increment( 'echo.event.mention.notification.failure-user-anonymous' );
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}
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// TODO batch?
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foreach ( $userMentions['unknownUsers'] as $unknownUser ) {
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$events[] = [
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'type' => 'mention-failure',
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'title' => $title,
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'extra' => [
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'failure-type' => 'user-unknown',
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'subject-name' => $unknownUser,
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'section-title' => $header,
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'revid' => $revision->getId(),
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],
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'agent' => $agent,
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];
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$stats->increment( 'echo.event.mention.notification.failure-user-unknown' );
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}
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}
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return $events;
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}
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private static function getOverallUserMentionsCount( array $userMentions ) {
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return count( $userMentions, COUNT_RECURSIVE ) - count( $userMentions );
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}
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/**
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* @param Title $title
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* @param int $revisionUserId
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* @param int[] $userLinks
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* @return array[]
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* Set of arrays containing valid mentions and possible intended but failed mentions.
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* - [validMentions]: An array of valid users to mention with ID => ID.
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* - [unknownUsers]: An array of DBKey strings representing unknown users.
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* - [anonymousUsers]: An array of DBKey strings representing anonymous IP users.
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*/
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public static function getUserMentions( Title $title, $revisionUserId, array $userLinks ) {
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global $wgEchoMaxMentionsCount;
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$userMentions = [
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'validMentions' => [],
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'unknownUsers' => [],
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'anonymousUsers' => [],
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];
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$count = 0;
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$stats = MediaWikiServices::getInstance()->getStatsdDataFactory();
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foreach ( $userLinks as $dbk => $page_id ) {
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// If more users are being pinged this is likely a spam/attack vector
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// Don't send any mention notifications.
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if ( $count > $wgEchoMaxMentionsCount ) {
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$stats->increment( 'echo.event.mention.error.tooMany' );
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break;
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}
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// we should not add user to 'mention' notification list if
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// 1. the user link links to a subpage
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if ( self::hasSubpage( $dbk ) ) {
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continue;
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}
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$userNameUtils = MediaWikiServices::getInstance()->getUserNameUtils();
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// 2. user is an anonymous IP
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if ( $userNameUtils->isIP( $dbk ) ) {
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$userMentions['anonymousUsers'][] = $dbk;
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$count++;
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$stats->increment( 'echo.event.mention.error.anonUser' );
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continue;
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}
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$user = User::newFromName( $dbk );
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// 3. the user name is not valid
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if ( !$user ) {
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$userMentions['unknownUsers'][] = str_replace( '_', ' ', $dbk );
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$count++;
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$stats->increment( 'echo.event.mention.error.invalidUser' );
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continue;
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}
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// 4. the user mentions themselves
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if ( $user->getId() === $revisionUserId ) {
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$stats->increment( 'echo.event.mention.error.sameUser' );
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continue;
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}
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// 5. the user is the owner of the talk page
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if ( $title->getNamespace() === NS_USER_TALK && $title->getDBkey() === $dbk ) {
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$stats->increment( 'echo.event.mention.error.ownPage' );
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continue;
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}
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// 6. user does not exist
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if ( $user->getId() === 0 ) {
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$userMentions['unknownUsers'][] = str_replace( '_', ' ', $dbk );
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$count++;
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$stats->increment( 'echo.event.mention.error.unknownUser' );
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continue;
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}
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$userMentions['validMentions'][$user->getId()] = $user->getId();
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$count++;
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}
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return $userMentions;
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}
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/**
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* @param string $content
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* @param Title $title
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* @return int[]
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* Array of links in the user namespace with DBKey => ID.
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*/
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public static function getUserLinks( $content, Title $title ) {
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$output = self::parseNonEditWikitext( $content, new Article( $title ) );
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$links = $output->getLinks();
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if ( !isset( $links[NS_USER] ) || !is_array( $links[NS_USER] ) ) {
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return [];
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}
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return $links[NS_USER];
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}
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private static function hasSubpage( $dbk ) {
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return strpos( $dbk, '/' ) !== false;
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}
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/**
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* It's like Article::prepareTextForEdit,
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* but not for editing (old wikitext usually)
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* Stolen from AbuseFilterVariableHolder
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*
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* @param string $wikitext
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* @param Article $article
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*
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* @return ParserOutput
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*/
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public static function parseNonEditWikitext( $wikitext, Article $article ) {
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static $cache = [];
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$cacheKey = md5( $wikitext ) . ':' . $article->getTitle()->getPrefixedText();
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if ( isset( $cache[$cacheKey] ) ) {
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return $cache[$cacheKey];
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}
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$parser = MediaWikiServices::getInstance()->getParser();
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$options = new ParserOptions( $article->getContext()->getUser() );
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$output = $parser->parse( $wikitext, $article->getTitle(), $options );
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$cache[$cacheKey] = $output;
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return $output;
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}
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/**
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* Given a Revision object, returns a talk-page-centric interpretation
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* of the changes made in it.
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*
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* @param RevisionRecord $revision
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* @see EchoDiscussionParser::interpretDiff
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* @return array[] See {@see interpretDiff} for details.
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*/
|
|
private static function getChangeInterpretationForRevision( RevisionRecord $revision ) {
|
|
if ( $revision->getId() && isset( self::$revisionInterpretationCache[$revision->getId()] ) ) {
|
|
return self::$revisionInterpretationCache[$revision->getId()];
|
|
}
|
|
|
|
$userIdentity = $revision->getUser();
|
|
$userID = $userIdentity ? $userIdentity->getId() : 0;
|
|
$userName = $userIdentity ? $userIdentity->getName() : '';
|
|
$user = $userID !== 0 ? User::newFromId( $userID ) : User::newFromName( $userName, false );
|
|
|
|
$prevText = '';
|
|
if ( $revision->getParentId() ) {
|
|
$store = MediaWikiServices::getInstance()->getRevisionStore();
|
|
$prevRevision = $store->getRevisionById( $revision->getParentId() );
|
|
if ( $prevRevision ) {
|
|
$prevText = ContentHandler::getContentText( $prevRevision->getContent( SlotRecord::MAIN ) ) ?: '';
|
|
}
|
|
}
|
|
|
|
$changes = self::getMachineReadableDiff(
|
|
$prevText,
|
|
ContentHandler::getContentText( $revision->getContent( SlotRecord::MAIN ) )
|
|
);
|
|
$output = self::interpretDiff(
|
|
$changes,
|
|
$user->getName(),
|
|
Title::newFromLinkTarget( $revision->getPageAsLinkTarget() )
|
|
);
|
|
|
|
self::$revisionInterpretationCache[$revision->getId()] = $output;
|
|
|
|
return $output;
|
|
}
|
|
|
|
/**
|
|
* Given a machine-readable diff, interprets the changes
|
|
* in terms of discussion page actions
|
|
*
|
|
* @todo Expand recognisable actions.
|
|
*
|
|
* @param array[] $changes Output of EchoEvent::getMachineReadableDiff
|
|
* @param string $username
|
|
* @param Title|null $title
|
|
* @return array[] Array of associative arrays.
|
|
*
|
|
* Each entry represents an action, which is classified in the 'action' field.
|
|
* All types contain a 'content' field except 'unknown'
|
|
* (which instead passes through the machine-readable diff in 'details')
|
|
* and 'unknown-change' (which provides 'new_content' and 'old_content')
|
|
* action may be:
|
|
* - add-comment: A comment signed by the user is added to an
|
|
* existing section.
|
|
* - new-section-with-comment: A new section is added, containing
|
|
* a single comment signed by the user in question.
|
|
* - add-section-multiple: A new section or additions to a section
|
|
* while editing multiple sections at once.
|
|
* - unknown-multi-signed-addition: Some signed content is added,
|
|
* but it contains multiple signatures.
|
|
* - unknown-unsigned-addition: Some content is added, but it is
|
|
* unsigned.
|
|
* - unknown-subtraction: Some content was removed. These actions are
|
|
* not currently analysed.
|
|
* - unknown-change: Some content was replaced with other content.
|
|
* - unknown-signed-change: Same as unknown-change, but signed.
|
|
* - unknown-multi-signed-change: Same as unknown-change,
|
|
* but it contains multiple signatures.
|
|
* - unknown: Unrecognised change type.
|
|
*/
|
|
public static function interpretDiff( array $changes, $username, Title $title = null ) {
|
|
// One extra item in $changes for _info
|
|
$actions = [];
|
|
$signedSections = [];
|
|
|
|
foreach ( $changes as $index => $change ) {
|
|
if ( !is_numeric( $index ) ) {
|
|
continue;
|
|
}
|
|
|
|
if ( !$change['action'] ) {
|
|
// Unknown action; skip
|
|
continue;
|
|
}
|
|
|
|
if ( $change['action'] === 'add' ) {
|
|
$content = trim( $change['content'] );
|
|
// The \A means the regex must match at the beginning of the string.
|
|
// This is slightly different than ^ which matches beginning of each
|
|
// line in multiline mode.
|
|
$startSection = preg_match( '/\A' . self::HEADER_REGEX . '/um', $content );
|
|
$sectionCount = self::getSectionCount( $content );
|
|
$signedUsers = array_keys( self::extractSignatures( $content, $title ) );
|
|
|
|
if (
|
|
count( $signedUsers ) === 1 &&
|
|
in_array( $username, $signedUsers )
|
|
) {
|
|
if ( $sectionCount === 0 ) {
|
|
$signedSections[] = self::getSectionSpan( $change['right-pos'], $changes['_info']['rhs'] );
|
|
$fullSection = self::getFullSection( $changes['_info']['rhs'], $change['right-pos'] );
|
|
$actions[] = [
|
|
'type' => 'add-comment',
|
|
'content' => $content,
|
|
'full-section' => $fullSection,
|
|
];
|
|
} elseif ( $startSection && $sectionCount === 1 ) {
|
|
$signedSections[] = self::getSectionSpan( $change['right-pos'], $changes['_info']['rhs'] );
|
|
$actions[] = [
|
|
'type' => 'new-section-with-comment',
|
|
'content' => $content,
|
|
];
|
|
} else {
|
|
$nextSectionStart = $change['right-pos'];
|
|
$sectionData = self::extractSections( $content );
|
|
foreach ( $sectionData as $section ) {
|
|
$sectionSpan = self::getSectionSpan( $nextSectionStart, $changes['_info']['rhs'] );
|
|
$nextSectionStart = $sectionSpan[1] + 1;
|
|
$sectionSignedUsers = self::extractSignatures( $section['content'], $title );
|
|
if ( !empty( $sectionSignedUsers ) ) {
|
|
$signedSections[] = $sectionSpan;
|
|
if ( !$section['header'] ) {
|
|
$fullSection = self::getFullSection(
|
|
$changes['_info']['rhs'],
|
|
$change['right-pos']
|
|
);
|
|
$section['header'] = self::extractHeader( $fullSection );
|
|
}
|
|
$actions[] = [
|
|
'type' => 'add-section-multiple',
|
|
'content' => $section['content'],
|
|
'header' => $section['header'],
|
|
];
|
|
} else {
|
|
$actions[] = [
|
|
'type' => 'unknown-unsigned-addition',
|
|
'content' => $section['content'],
|
|
];
|
|
}
|
|
}
|
|
}
|
|
} elseif ( $signedUsers !== [] ) {
|
|
$actions[] = [
|
|
'type' => 'unknown-multi-signed-addition',
|
|
'content' => $content,
|
|
];
|
|
} else {
|
|
$actions[] = [
|
|
'type' => 'unknown-unsigned-addition',
|
|
'content' => $content,
|
|
];
|
|
}
|
|
} elseif ( $change['action'] === 'subtract' ) {
|
|
$actions[] = [
|
|
'type' => 'unknown-subtraction',
|
|
'content' => $change['content'],
|
|
];
|
|
} elseif ( $change['action'] === 'change' ) {
|
|
$actions[] = [
|
|
'type' => 'unknown-change',
|
|
'old_content' => $change['old_content'],
|
|
'new_content' => $change['new_content'],
|
|
'right-pos' => $change['right-pos'],
|
|
'full-section' => self::getFullSection( $changes['_info']['rhs'], $change['right-pos'] ),
|
|
];
|
|
|
|
if ( self::hasNewSignature(
|
|
$change['old_content'],
|
|
$change['new_content'],
|
|
$username,
|
|
$title
|
|
) ) {
|
|
$signedSections[] = self::getSectionSpan( $change['right-pos'], $changes['_info']['rhs'] );
|
|
}
|
|
} else {
|
|
$actions[] = [
|
|
'type' => 'unknown',
|
|
'details' => $change,
|
|
];
|
|
}
|
|
}
|
|
|
|
if ( !empty( $signedSections ) ) {
|
|
$actions = self::convertToUnknownSignedChanges( $signedSections, $actions );
|
|
}
|
|
|
|
return $actions;
|
|
}
|
|
|
|
private static function getSignedUsers( $content, $title ) {
|
|
return array_keys( self::extractSignatures( $content, $title ) );
|
|
}
|
|
|
|
private static function hasNewSignature( $oldContent, $newContent, $username, $title ) {
|
|
$oldSignedUsers = self::getSignedUsers( $oldContent, $title );
|
|
$newSignedUsers = self::getSignedUsers( $newContent, $title );
|
|
|
|
return !in_array( $username, $oldSignedUsers ) && in_array( $username, $newSignedUsers );
|
|
}
|
|
|
|
/**
|
|
* Converts actions of type "unknown-change" to "unknown-signed-change" if the change is in a signed section.
|
|
*
|
|
* @param array[] $signedSections Array of arrays containing first and last line number of signed sections
|
|
* @param array[] $actions
|
|
* @return array[] Converted actions
|
|
*/
|
|
private static function convertToUnknownSignedChanges( array $signedSections, array $actions ) {
|
|
return array_map( function ( $action ) use( $signedSections ) {
|
|
if (
|
|
$action['type'] === 'unknown-change' &&
|
|
self::isInSignedSection( $action['right-pos'], $signedSections )
|
|
) {
|
|
$signedUsers = self::getSignedUsers( $action['new_content'], null );
|
|
if ( count( $signedUsers ) === 1 ) {
|
|
$action['type'] = 'unknown-signed-change';
|
|
} else {
|
|
$action['type'] = 'unknown-multi-signed-change';
|
|
}
|
|
}
|
|
|
|
return $action;
|
|
}, $actions );
|
|
}
|
|
|
|
/**
|
|
* @param int $line
|
|
* @param array[] $signedSections
|
|
* @return bool
|
|
*/
|
|
private static function isInSignedSection( $line, array $signedSections ) {
|
|
foreach ( $signedSections as $section ) {
|
|
if ( $line > $section[0] && $line <= $section[1] ) {
|
|
return true;
|
|
}
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Finds the section that a given line is in.
|
|
*
|
|
* @param array $lines of lines in the page.
|
|
* @param int $offset The line to find the full section for.
|
|
* @return string Content of the section.
|
|
*/
|
|
public static function getFullSection( array $lines, $offset ) {
|
|
$start = self::getSectionStartIndex( $offset, $lines );
|
|
$end = self::getSectionEndIndex( $offset, $lines );
|
|
$content = implode( "\n", array_slice( $lines, $start, $end - $start ) );
|
|
|
|
return trim( $content, "\n" );
|
|
}
|
|
|
|
/**
|
|
* Given a line number and a text, find the first and last line of the section the line number is in.
|
|
* If there are subsections, the last line index will be the line before the beginning of the first subsection.
|
|
* @param int $offset line number
|
|
* @param string[] $lines
|
|
* @return int[] Tuple [$firstLine, $lastLine]
|
|
*/
|
|
private static function getSectionSpan( $offset, array $lines ) {
|
|
return [
|
|
self::getSectionStartIndex( $offset, $lines ),
|
|
self::getSectionEndIndex( $offset, $lines )
|
|
];
|
|
}
|
|
|
|
/**
|
|
* Finds the line number of the start of the section that $offset is in.
|
|
* @param int $offset
|
|
* @param string[] $lines
|
|
* @return int
|
|
*/
|
|
private static function getSectionStartIndex( $offset, array $lines ) {
|
|
for ( $i = $offset - 1; $i >= 0; $i-- ) {
|
|
if ( self::getSectionCount( $lines[$i] ) ) {
|
|
break;
|
|
}
|
|
}
|
|
|
|
return $i;
|
|
}
|
|
|
|
/**
|
|
* Finds the line number of the end of the section that $offset is in.
|
|
* @param int $offset
|
|
* @param array $lines
|
|
* @return int
|
|
*/
|
|
private static function getSectionEndIndex( $offset, array $lines ) {
|
|
$lastLine = count( $lines );
|
|
for ( $i = $offset; $i < $lastLine; $i++ ) {
|
|
if ( self::getSectionCount( $lines[$i] ) ) {
|
|
break;
|
|
}
|
|
}
|
|
|
|
return $i;
|
|
}
|
|
|
|
/**
|
|
* Gets the number of section headers in a string.
|
|
*
|
|
* @param string $text
|
|
* @return int Number of section headers found.
|
|
*/
|
|
public static function getSectionCount( $text ) {
|
|
$text = trim( $text );
|
|
|
|
return (int)preg_match_all( '/' . self::HEADER_REGEX . '/um', $text );
|
|
}
|
|
|
|
/**
|
|
* Gets the title of a section or sub section
|
|
*
|
|
* @param string $text The text of the section.
|
|
* @return string|false The title of the section or false if not found
|
|
*/
|
|
public static function extractHeader( $text ) {
|
|
$text = trim( $text );
|
|
|
|
$matches = [];
|
|
|
|
if ( !preg_match_all( '/' . self::HEADER_REGEX . '/um', $text, $matches ) ) {
|
|
return false;
|
|
}
|
|
|
|
return trim( end( $matches[2] ) );
|
|
}
|
|
|
|
/**
|
|
* Extracts sections and their contents from text.
|
|
*
|
|
* @param string $text The text to parse.
|
|
* @return array[]
|
|
* Array of arrays containing sections with header and content.
|
|
* - [header]: The full header string of the section or false if there is preceding text without header.
|
|
* - [content]: The content of the section including the header string.
|
|
*/
|
|
private static function extractSections( $text ) {
|
|
$matches = [];
|
|
|
|
if ( !preg_match_all( '/' . self::HEADER_REGEX . '/um', $text, $matches, PREG_OFFSET_CAPTURE ) ) {
|
|
return [ [
|
|
'header' => false,
|
|
'content' => $text
|
|
] ];
|
|
}
|
|
|
|
$sectionNum = count( $matches[0] );
|
|
$sections = [];
|
|
|
|
if ( $matches[0][0][1] > 1 ) { // is there text before the first headline?
|
|
$sections[] = [
|
|
'header' => false,
|
|
'content' => substr( $text, 0, $matches[0][0][1] - 1 )
|
|
];
|
|
}
|
|
for ( $i = 0; $i < $sectionNum; $i++ ) {
|
|
if ( $i + 1 < $sectionNum ) {
|
|
$content = substr( $text, $matches[0][$i][1], $matches[0][$i + 1][1] - $matches[0][$i][1] );
|
|
} else {
|
|
$content = substr( $text, $matches[0][$i][1] );
|
|
}
|
|
$sections[] = [
|
|
'header' => self::extractHeader( $matches[0][$i][0] ),
|
|
'content' => trim( $content )
|
|
];
|
|
}
|
|
|
|
return $sections;
|
|
}
|
|
|
|
/**
|
|
* Strips out a signature if possible.
|
|
*
|
|
* @param string $text The wikitext to strip
|
|
* @param Title|null $title
|
|
* @return string
|
|
*/
|
|
private static function stripSignature( $text, Title $title = null ) {
|
|
$output = self::getUserFromLine( $text, $title );
|
|
if ( $output === false ) {
|
|
$timestampPos = self::getTimestampPosition( $text );
|
|
|
|
return substr( $text, 0, $timestampPos );
|
|
}
|
|
|
|
// Use truncateForDatabase() instead of truncateHTML() because
|
|
// truncateHTML() would not strip signature if the text contains
|
|
// < or &. (And we can't use truncateForVisual() because
|
|
// self::getUserFromLine() returns byte offsets, not character
|
|
// offsets.)
|
|
return MediaWikiServices::getInstance()->getContentLanguage()
|
|
->truncateForDatabase( $text, $output[0], '' );
|
|
}
|
|
|
|
/**
|
|
* Strips out a section header
|
|
* @param string $text The text to strip out the section header from.
|
|
* @return string The same text, with the section header stripped out.
|
|
*/
|
|
private static function stripHeader( $text ) {
|
|
$text = preg_replace( '/' . self::HEADER_REGEX . '/um', '', $text );
|
|
|
|
return $text;
|
|
}
|
|
|
|
/**
|
|
* Determines whether the input is a signed comment.
|
|
*
|
|
* @param string $text The text to check.
|
|
* @param User|bool $user If set, will only return true if the comment is
|
|
* signed by this user.
|
|
* @param Title|null $title
|
|
* @return bool
|
|
*/
|
|
public static function isSignedComment( $text, $user = false, Title $title = null ) {
|
|
$userData = self::getUserFromLine( $text, $title );
|
|
|
|
if ( $userData === false ) {
|
|
return false;
|
|
} elseif ( $user === false ) {
|
|
return true;
|
|
}
|
|
|
|
list( , $foundUser ) = $userData;
|
|
$userNameUtils = MediaWikiServices::getInstance()->getUserNameUtils();
|
|
|
|
return $userNameUtils->getCanonical( $foundUser, UserNameUtils::RIGOR_NONE ) ===
|
|
$userNameUtils->getCanonical( $user, UserNameUtils::RIGOR_NONE );
|
|
}
|
|
|
|
/**
|
|
* Finds the start position, if any, of the timestamp on a line
|
|
*
|
|
* @param string $line The line to search for a signature on
|
|
* @return int|false Integer position
|
|
*/
|
|
public static function getTimestampPosition( $line ) {
|
|
$timestampRegex = self::getTimestampRegex();
|
|
$tsMatches = [];
|
|
if ( !preg_match(
|
|
"/$timestampRegex/mu",
|
|
$line,
|
|
$tsMatches,
|
|
PREG_OFFSET_CAPTURE
|
|
) ) {
|
|
return false;
|
|
}
|
|
|
|
return $tsMatches[0][1];
|
|
}
|
|
|
|
/**
|
|
* Finds differences between $oldText and $newText
|
|
* and returns the result in a machine-readable format.
|
|
*
|
|
* @param string $oldText The "left hand side" of the diff.
|
|
* @param string $newText The "right hand side" of the diff.
|
|
* @throws MWException
|
|
* @return array[] Array of changes.
|
|
* Each change consists of:
|
|
* * An 'action', one of:
|
|
* - add
|
|
* - subtract
|
|
* - change
|
|
* * 'content' that was added or removed, or in the case
|
|
* of a change, 'old_content' and 'new_content'
|
|
* * 'left_pos' and 'right_pos' (in lines) of the change.
|
|
*/
|
|
public static function getMachineReadableDiff( $oldText, $newText ) {
|
|
if ( !isset( self::$diffParser ) ) {
|
|
self::$diffParser = new EchoDiffParser;
|
|
}
|
|
|
|
return self::$diffParser->getChangeSet( $oldText, $newText );
|
|
}
|
|
|
|
/**
|
|
* Finds and extracts signatures in $text
|
|
*
|
|
* @param string $text The text in which to look for signed comments.
|
|
* @param Title|null $title
|
|
* @return string[] Associative array, the key is the username, the value
|
|
* is the last signature that was found.
|
|
*/
|
|
private static function extractSignatures( $text, Title $title = null ) {
|
|
$lines = explode( "\n", $text );
|
|
|
|
$output = [];
|
|
|
|
$lineNumber = 0;
|
|
|
|
foreach ( $lines as $line ) {
|
|
++$lineNumber;
|
|
|
|
// Look for the last user link on the line.
|
|
$userData = self::getUserFromLine( $line, $title );
|
|
if ( $userData === false ) {
|
|
continue;
|
|
}
|
|
|
|
list( $signaturePos, $user ) = $userData;
|
|
|
|
$signature = substr( $line, $signaturePos );
|
|
$output[$user] = $signature;
|
|
}
|
|
|
|
return $output;
|
|
}
|
|
|
|
/**
|
|
* From a line in the signature, extract all the users linked to
|
|
*
|
|
* @param string $line Line of text potentially including linked user, user talk,
|
|
* and contribution pages
|
|
* @return string[] array of usernames, empty array for none detected
|
|
*/
|
|
public static function extractUsersFromLine( $line ) {
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|
/*
|
|
* Signatures can look like anything (as defined by i18n messages
|
|
* "signature" & "signature-anon").
|
|
* A signature can, e.g., be both a link to user & user-talk page.
|
|
*/
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|
// match all title-like excerpts in this line
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|
if ( !preg_match_all( '/\[\[([^\[]+)\]\]/', $line, $matches ) ) {
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|
return [];
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|
}
|
|
|
|
$matches = $matches[1];
|
|
|
|
$usernames = [];
|
|
|
|
foreach ( $matches as $match ) {
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|
/*
|
|
* Create an object out of the link title.
|
|
* In theory, links can be [[text]], [[text|text]] or pipe tricks
|
|
* [[text|]] or [[|text]].
|
|
* In the case of reverse pipe trick, the value we use *could* be
|
|
* empty, but Parser::pstPass2 should have normalized that for us
|
|
* already.
|
|
*/
|
|
$match = explode( '|', $match, 2 );
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|
$title = Title::newFromText( $match[0] );
|
|
|
|
// figure out if we the link is related to a user
|
|
if (
|
|
$title &&
|
|
( $title->getNamespace() === NS_USER || $title->getNamespace() === NS_USER_TALK )
|
|
) {
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|
$usernames[] = $title->getText();
|
|
} elseif ( $title && $title->isSpecial( 'Contributions' ) ) {
|
|
$parts = explode( '/', $title->getText(), 2 );
|
|
$usernames[] = end( $parts );
|
|
} else {
|
|
// move on to next matched title-like excerpt
|
|
continue;
|
|
}
|
|
}
|
|
|
|
return $usernames;
|
|
}
|
|
|
|
/**
|
|
* From a line in a wiki page, determine which user, if any,
|
|
* has signed it.
|
|
*
|
|
* @param string $line
|
|
* @param Title|null $title
|
|
* @return array|false False for none, array for success.
|
|
* - First element is the position of the signature.
|
|
* - Second element is the normalised user name.
|
|
*/
|
|
public static function getUserFromLine( $line, Title $title = null ) {
|
|
$parser = MediaWikiServices::getInstance()->getParser();
|
|
|
|
/*
|
|
* First we call extractUsersFromLine to get all the potential usernames
|
|
* from the line. Then, we loop backwards through them, figure out which
|
|
* match to a user, regenera the signature based on that user, and
|
|
* see if it matches!
|
|
*/
|
|
$usernames = self::extractUsersFromLine( $line );
|
|
$usernames = array_reverse( $usernames );
|
|
foreach ( $usernames as $username ) {
|
|
// generate (dateless) signature from the user we think we've
|
|
// discovered the signature from
|
|
// don't validate the username - anon (IP) is fine!
|
|
$user = User::newFromName( $username, false );
|
|
$sig = $parser->preSaveTransform(
|
|
'~~~',
|
|
$title ?: Title::newMainPage(),
|
|
$user,
|
|
new ParserOptions( $user )
|
|
);
|
|
|
|
// see if we can find this user's generated signature in the content
|
|
$pos = strrpos( $line, $sig );
|
|
if ( $pos !== false ) {
|
|
return [ $pos, $username ];
|
|
}
|
|
// couldn't find sig, move on to next link excerpt and try there
|
|
}
|
|
|
|
// couldn't find any matching signature
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Find the last link beginning with a given prefix on a line.
|
|
*
|
|
* @param string $line The line to search.
|
|
* @param string $linkPrefix The prefix to search for.
|
|
* @param int|false $failureOffset
|
|
* @return array|false False for failure, array for success.
|
|
* - First element is the string offset of the link.
|
|
* - Second element is the user the link refers to.
|
|
*/
|
|
private static function getLinkFromLine( $line, $linkPrefix, $failureOffset = false ) {
|
|
$offset = 0;
|
|
|
|
// If extraction failed at another offset, try again.
|
|
if ( $failureOffset !== false ) {
|
|
$offset = $failureOffset - strlen( $line ) - 1;
|
|
}
|
|
|
|
// Avoid PHP warning: Offset is greater than the length of haystack string
|
|
if ( abs( $offset ) > strlen( $line ) ) {
|
|
return false;
|
|
}
|
|
|
|
$linkPos = strripos( $line, $linkPrefix, $offset );
|
|
|
|
if ( $linkPos === false ) {
|
|
return false;
|
|
}
|
|
|
|
$linkUser = self::extractUserFromLink( $line, $linkPrefix, $linkPos );
|
|
|
|
if ( $linkUser === false ) {
|
|
// Look for another place.
|
|
return self::getLinkFromLine( $line, $linkPrefix, $linkPos );
|
|
} else {
|
|
return [ $linkPos, $linkUser ];
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Given text including a link, gives the user that that link refers to
|
|
*
|
|
* @param string $text The text to extract from.
|
|
* @param string $prefix The link prefix that was used to find the link.
|
|
* @param int $offset Optionally, the offset of the start of the link.
|
|
* @return bool|string Type description
|
|
*/
|
|
private static function extractUserFromLink( $text, $prefix, $offset = 0 ) {
|
|
$userPart = substr( $text, strlen( $prefix ) + $offset );
|
|
|
|
$userMatches = [];
|
|
if ( !preg_match(
|
|
'/^[^\|\]\#]+/u',
|
|
$userPart,
|
|
$userMatches
|
|
) ) {
|
|
// user link is invalid
|
|
return false;
|
|
}
|
|
|
|
$user = $userMatches[0];
|
|
$userNameUtils = MediaWikiServices::getInstance()->getUserNameUtils();
|
|
if (
|
|
!$userNameUtils->isIP( $user ) &&
|
|
$userNameUtils->getCanonical( $user ) === false
|
|
) {
|
|
// Not a real username
|
|
return false;
|
|
}
|
|
|
|
return $userNameUtils->getCanonical( $userMatches[0], UserNameUtils::RIGOR_NONE );
|
|
}
|
|
|
|
/**
|
|
* Gets a regular expression that will match this wiki's
|
|
* timestamps as given by ~~~~.
|
|
*
|
|
* @throws MWException
|
|
* @return string regular expression fragment.
|
|
*/
|
|
public static function getTimestampRegex() {
|
|
if ( self::$timestampRegex !== null ) {
|
|
return self::$timestampRegex;
|
|
}
|
|
|
|
// Step 1: Get an exemplar timestamp
|
|
$title = Title::newMainPage();
|
|
$user = User::newFromName( 'Test' );
|
|
$options = new ParserOptions( $user );
|
|
|
|
$parser = MediaWikiServices::getInstance()->getParser();
|
|
$exemplarTimestamp =
|
|
$parser->preSaveTransform( '~~~~~', $title, $user, $options );
|
|
|
|
// Step 2: Generalise it
|
|
// Trim off the timezone to replace at the end
|
|
$output = $exemplarTimestamp;
|
|
$tzRegex = '/\h*\(\w+\)\h*$/u';
|
|
$tzMatches = [];
|
|
if ( preg_match( $tzRegex, $output, $tzMatches, PREG_OFFSET_CAPTURE ) ) {
|
|
$output = substr( $output, 0, $tzMatches[0][1] );
|
|
}
|
|
$output = preg_quote( $output, '/' );
|
|
$output = preg_replace( '/[^\d\W]+/u', '[^\d\W]+', $output );
|
|
$output = preg_replace( '/\d+/u', '\d+', $output );
|
|
|
|
if ( $tzMatches ) {
|
|
$output .= preg_quote( $tzMatches[0][0] );
|
|
}
|
|
|
|
if ( !preg_match( "/$output/u", $exemplarTimestamp ) ) {
|
|
throw new MWException( "Timestamp regex does not match exemplar" );
|
|
}
|
|
|
|
self::$timestampRegex = $output;
|
|
|
|
return $output;
|
|
}
|
|
|
|
/**
|
|
* Parse wikitext into truncated plain text.
|
|
* @param string $text
|
|
* @param Language $lang
|
|
* @param int $length Length in characters (not bytes); default DEFAULT_SNIPPET_LENGTH
|
|
* @param Title|null $title Page from which the text snippet is being extracted
|
|
* @return string
|
|
*/
|
|
public static function getTextSnippet(
|
|
$text, Language $lang, $length = self::DEFAULT_SNIPPET_LENGTH, $title = null
|
|
) {
|
|
// Parse wikitext
|
|
$html = MediaWikiServices::getInstance()->getMessageCache()->parse( $text, $title )->getText( [
|
|
'enableSectionEditLinks' => false
|
|
] );
|
|
$plaintext = trim( Sanitizer::stripAllTags( $html ) );
|
|
return $lang->truncateForVisual( $plaintext, $length );
|
|
}
|
|
|
|
/**
|
|
* Parse an edit summary into truncated plain text.
|
|
* @param string $text
|
|
* @param Language $lang
|
|
* @param int $length Length in characters (not bytes); default DEFAULT_SNIPPET_LENGTH
|
|
* @return string
|
|
*/
|
|
public static function getTextSnippetFromSummary( $text, Language $lang, $length = self::DEFAULT_SNIPPET_LENGTH ) {
|
|
// Parse wikitext with summary parser
|
|
$html = Linker::formatLinksInComment( Sanitizer::escapeHtmlAllowEntities( $text ) );
|
|
$plaintext = trim( Sanitizer::stripAllTags( $html ) );
|
|
return $lang->truncateForVisual( $plaintext, $length );
|
|
}
|
|
|
|
/**
|
|
* Extract an edit excerpt from a revision
|
|
*
|
|
* @param RevisionRecord $revision
|
|
* @param Language $lang
|
|
* @param int $length Length in characters (not bytes); default DEFAULT_SNIPPET_LENGTH
|
|
* @return string
|
|
*/
|
|
public static function getEditExcerpt(
|
|
RevisionRecord $revision, Language $lang, $length = self::DEFAULT_SNIPPET_LENGTH
|
|
) {
|
|
$interpretation = self::getChangeInterpretationForRevision( $revision );
|
|
$section = self::detectSectionTitleAndText( $interpretation );
|
|
return $lang->truncateForVisual( $section['section-title'] . ' ' . $section['section-text'], $length );
|
|
}
|
|
}
|