addWikiMsg( 'feed-unavailable' );
return false;
}
if ( !isset( $wgFeedClasses[$type] ) ) {
$wgOut->addWikiMsg( 'feed-invalid' );
return false;
}
return true;
}
/**
* Format a diff for the newsfeed
*
* @param object $row Row from the recentchanges table, including fields as
* appropriate for CommentStore
* @return string
*/
public static function formatDiff( $row ) {
$titleObj = Title::makeTitle( $row->rc_namespace, $row->rc_title );
$timestamp = wfTimestamp( TS_MW, $row->rc_timestamp );
$actiontext = '';
if ( $row->rc_type == RC_LOG ) {
$rcRow = (array)$row; // newFromRow() only accepts arrays for RC rows
$actiontext = LogFormatter::newFromRow( $rcRow )->getActionText();
}
return self::formatDiffRow( $titleObj,
$row->rc_last_oldid, $row->rc_this_oldid,
$timestamp,
$row->rc_deleted & RevisionRecord::DELETED_COMMENT
? wfMessage( 'rev-deleted-comment' )->escaped()
: CommentStore::getStore()->getComment( 'rc_comment', $row )->text,
$actiontext
);
}
/**
* Really format a diff for the newsfeed
*
* @param Title $title
* @param int $oldid Old revision's id
* @param int $newid New revision's id
* @param int $timestamp New revision's timestamp
* @param string $comment New revision's comment
* @param string $actiontext Text of the action; in case of log event
* @return string
*/
public static function formatDiffRow( $title, $oldid, $newid, $timestamp,
$comment, $actiontext = ''
) {
global $wgFeedDiffCutoff, $wgLang;
// log entries
$completeText = '' . implode( ' ',
array_filter(
[
$actiontext,
Linker::formatComment( $comment ) ] ) ) . "
\n";
// NOTE: Check permissions for anonymous users, not current user.
// No "privileged" version should end up in the cache.
// Most feed readers will not log in anyway.
$anon = new User();
$services = MediaWikiServices::getInstance();
$permManager = $services->getPermissionManager();
$accErrors = $permManager->getPermissionErrors(
'read',
$anon,
$title
);
// Can't diff special pages, unreadable pages or pages with no new revision
// to compare against: just return the text.
if ( $title->getNamespace() < 0 || $accErrors || !$newid ) {
return $completeText;
}
$revLookup = $services->getRevisionLookup();
$contentHandlerFactory = $services->getContentHandlerFactory();
if ( $oldid ) {
$diffText = '';
// Don't bother generating the diff if we won't be able to show it
if ( $wgFeedDiffCutoff > 0 ) {
$revRecord = $revLookup->getRevisionById( $oldid );
if ( !$revRecord ) {
$diffText = false;
} else {
$context = clone RequestContext::getMain();
$context->setTitle( $title );
$model = $revRecord->getSlot(
SlotRecord::MAIN,
RevisionRecord::RAW
)->getModel();
$contentHandler = $contentHandlerFactory->getContentHandler( $model );
$de = $contentHandler->createDifferenceEngine( $context, $oldid, $newid );
$diffText = $de->getDiff(
wfMessage( 'previousrevision' )->text(), // hack
wfMessage( 'revisionasof',
$wgLang->timeanddate( $timestamp ),
$wgLang->date( $timestamp ),
$wgLang->time( $timestamp ) )->text() );
}
}
if ( $wgFeedDiffCutoff <= 0 || ( strlen( $diffText ) > $wgFeedDiffCutoff ) ) {
// Omit large diffs
$diffText = self::getDiffLink( $title, $newid, $oldid );
} elseif ( $diffText === false ) {
// Error in diff engine, probably a missing revision
$diffText = "Can't load revision $newid
";
} else {
// Diff output fine, clean up any illegal UTF-8
$diffText = UtfNormal\Validator::cleanUp( $diffText );
$diffText = self::applyDiffStyle( $diffText );
}
} else {
$revRecord = $revLookup->getRevisionById( $newid );
if ( $wgFeedDiffCutoff <= 0 || $revRecord === null ) {
$newContent = $contentHandlerFactory
->getContentHandler( $title->getContentModel() )
->makeEmptyContent();
} else {
$newContent = $revRecord->getContent( SlotRecord::MAIN );
}
if ( $newContent instanceof TextContent ) {
// only textual content has a "source view".
$text = $newContent->getText();
if ( $wgFeedDiffCutoff <= 0 || strlen( $text ) > $wgFeedDiffCutoff ) {
$html = null;
} else {
$html = nl2br( htmlspecialchars( $text ) );
}
} else {
// XXX: we could get an HTML representation of the content via getParserOutput, but that may
// contain JS magic and generally may not be suitable for inclusion in a feed.
// Perhaps Content should have a getDescriptiveHtml method and/or a getSourceText method.
// Compare also ApiFeedContributions::feedItemDesc
$html = null;
}
if ( $html === null ) {
// Omit large new page diffs, T31110
// Also use diff link for non-textual content
$diffText = self::getDiffLink( $title, $newid );
} else {
$diffText = '' . wfMessage( 'newpage' )->text() . '
' .
'' . $html . '
';
}
}
$completeText .= $diffText;
return $completeText;
}
/**
* Generates a diff link. Used when the full diff is not wanted for example
* when $wgFeedDiffCutoff is 0.
*
* @param Title $title Title object: used to generate the diff URL
* @param int $newid Newid for this diff
* @param int|null $oldid Oldid for the diff. Null means it is a new article
* @return string
*/
protected static function getDiffLink( Title $title, $newid, $oldid = null ) {
$queryParameters = [ 'diff' => $newid ];
if ( $oldid != null ) {
$queryParameters['oldid'] = $oldid;
}
$diffUrl = $title->getFullURL( $queryParameters );
$diffLink = Html::element( 'a', [ 'href' => $diffUrl ],
wfMessage( 'showdiff' )->inContentLanguage()->text() );
return $diffLink;
}
/**
* Hacky application of diff styles for the feeds.
* Might be 'cleaner' to use DOM or XSLT or something,
* but *gack* it's a pain in the ass.
*
* @param string $text Diff's HTML output
* @return string Modified HTML
*/
public static function applyDiffStyle( $text ) {
$styles = [
'diff' => 'background-color: #fff; color: #202122;',
'diff-otitle' => 'background-color: #fff; color: #202122; text-align: center;',
'diff-ntitle' => 'background-color: #fff; color: #202122; text-align: center;',
'diff-addedline' => 'color: #202122; font-size: 88%; border-style: solid; '
. 'border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; '
. 'vertical-align: top; white-space: pre-wrap;',
'diff-deletedline' => 'color: #202122; font-size: 88%; border-style: solid; '
. 'border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; '
. 'vertical-align: top; white-space: pre-wrap;',
'diff-context' => 'background-color: #f8f9fa; color: #202122; font-size: 88%; '
. 'border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; '
. 'border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;',
'diffchange' => 'font-weight: bold; text-decoration: none;',
];
foreach ( $styles as $class => $style ) {
$text = preg_replace( "/(<[^>]+)class=(['\"])$class\\2([^>]*>)/",
"\\1style=\"$style\"\\3", $text );
}
return $text;
}
}