3 * Job to fix double redirects after moving a page.
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25 * Job to fix double redirects after moving a page
29 class DoubleRedirectJob
extends Job
{
30 var $reason, $redirTitle, $destTitleText;
38 * Insert jobs into the job queue to fix redirects to the given title
39 * @param $reason String: the reason for the fix, see message "double-redirect-fixed-<reason>"
40 * @param $redirTitle Title: the title which has changed, redirects pointing to this title are fixed
41 * @param $destTitle bool Not used
43 public static function fixRedirects( $reason, $redirTitle, $destTitle = false ) {
44 # Need to use the master to get the redirect table updated in the same transaction
45 $dbw = wfGetDB( DB_MASTER
);
47 array( 'redirect', 'page' ),
48 array( 'page_namespace', 'page_title' ),
51 'rd_namespace' => $redirTitle->getNamespace(),
52 'rd_title' => $redirTitle->getDBkey()
54 if ( !$res->numRows() ) {
58 foreach ( $res as $row ) {
59 $title = Title
::makeTitle( $row->page_namespace
, $row->page_title
);
64 $jobs[] = new self( $title, array(
66 'redirTitle' => $redirTitle->getPrefixedDBkey() ) );
67 # Avoid excessive memory usage
68 if ( count( $jobs ) > 10000 ) {
69 Job
::batchInsert( $jobs );
73 Job
::batchInsert( $jobs );
76 function __construct( $title, $params = false, $id = 0 ) {
77 parent
::__construct( 'fixDoubleRedirect', $title, $params, $id );
78 $this->reason
= $params['reason'];
79 $this->redirTitle
= Title
::newFromText( $params['redirTitle'] );
80 $this->destTitleText
= !empty( $params['destTitle'] ) ?
$params['destTitle'] : '';
87 if ( !$this->redirTitle
) {
88 $this->setLastError( 'Invalid title' );
92 $targetRev = Revision
::newFromTitle( $this->title
);
94 wfDebug( __METHOD__
.": target redirect already deleted, ignoring\n" );
97 $content = $targetRev->getContent();
98 $currentDest = $content->getRedirectTarget();
99 if ( !$currentDest ||
!$currentDest->equals( $this->redirTitle
) ) {
100 wfDebug( __METHOD__
.": Redirect has changed since the job was queued\n" );
104 # Check for a suppression tag (used e.g. in periodically archived discussions)
105 $text = ContentHandler
::getContentText( $content );
106 $mw = MagicWord
::get( 'staticredirect' );
107 if ( $mw->match( $text ) ) { #FIXME: add support for this to ContentHandler/Content
108 wfDebug( __METHOD__
.": skipping: suppressed with __STATICREDIRECT__\n" );
112 # Find the current final destination
113 $newTitle = self
::getFinalDestination( $this->redirTitle
);
115 wfDebug( __METHOD__
.": skipping: single redirect, circular redirect or invalid redirect destination\n" );
118 if ( $newTitle->equals( $this->redirTitle
) ) {
119 # The redirect is already right, no need to change it
120 # This can happen if the page was moved back (say after vandalism)
121 wfDebug( __METHOD__
.": skipping, already good\n" );
124 # Preserve fragment (bug 14904)
125 $newTitle = Title
::makeTitle( $newTitle->getNamespace(), $newTitle->getDBkey(),
126 $currentDest->getFragment() );
129 # Remember that redirect pages can have categories, templates, etc.,
130 # so the regex has to be fairly general
131 $newText = preg_replace( '/ \[ \[ [^\]]* \] \] /x',
132 '[[' . $newTitle->getFullText() . ']]',
133 $text, 1 ); #FIXME: need a way to do this via ContentHandler!
135 if ( $newText === $text ) {
136 $this->setLastError( 'Text unchanged???' );
143 $wgUser = $this->getUser();
144 $article = WikiPage
::factory( $this->title
);
145 $reason = wfMsgForContent( 'double-redirect-fixed-' . $this->reason
,
146 $this->redirTitle
->getPrefixedText(), $newTitle->getPrefixedText() );
147 $article->doEdit( $newText, $reason, EDIT_UPDATE | EDIT_SUPPRESS_RC
, false, $this->getUser() );
154 * Get the final destination of a redirect
156 * @param $title Title
158 * @return bool if the specified title is not a redirect, or if it is a circular redirect
160 public static function getFinalDestination( $title ) {
161 $dbw = wfGetDB( DB_MASTER
);
163 $seenTitles = array(); # Circular redirect check
167 $titleText = $title->getPrefixedDBkey();
168 if ( isset( $seenTitles[$titleText] ) ) {
169 wfDebug( __METHOD__
, "Circular redirect detected, aborting\n" );
172 $seenTitles[$titleText] = true;
174 $row = $dbw->selectRow(
175 array( 'redirect', 'page' ),
176 array( 'rd_namespace', 'rd_title' ),
179 'page_namespace' => $title->getNamespace(),
180 'page_title' => $title->getDBkey()
183 # No redirect from here, chain terminates
186 $dest = $title = Title
::makeTitle( $row->rd_namespace
, $row->rd_title
);
193 * Get a user object for doing edits, from a request-lifetime cache
197 if ( !self
::$user ) {
198 self
::$user = User
::newFromName( wfMsgForContent( 'double-redirect-fixer' ), false );
199 # FIXME: newFromName could return false on a badly configured wiki.
200 if ( !self
::$user->isLoggedIn() ) {
201 self
::$user->addToDatabase();