Update to MediaWiki 1.24.1

1 files changed, 250 insertions, 0 deletions

diff --git a/includes/jobqueue/jobs/DoubleRedirectJob.php b/includes/jobqueue/jobs/DoubleRedirectJob.php
new file mode 100644
index 00000000..2561f2f1
--- /dev/null
+++ b/includes/jobqueue/jobs/DoubleRedirectJob.php
@@ -0,0 +1,250 @@
+<?php
+/**
+ * Job to fix double redirects after moving a page.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ * http://www.gnu.org/copyleft/gpl.html
+ *
+ * @file
+ * @ingroup JobQueue
+ */
+
+/**
+ * Job to fix double redirects after moving a page
+ *
+ * @ingroup JobQueue
+ */
+class DoubleRedirectJob extends Job {
+	/** @var string Reason for the change, 'maintenance' or 'move'. Suffix fo
+	 *    message key 'double-redirect-fixed-'.
+	 */
+	private $reason;
+
+	/** @var Title The title which has changed, redirects pointing to this
+	 *    title are fixed
+	 */
+	private $redirTitle;
+
+	/** @var User */
+	private static $user;
+
+	/**
+	 * Insert jobs into the job queue to fix redirects to the given title
+	 * @param string $reason The reason for the fix, see message
+	 *   "double-redirect-fixed-<reason>"
+	 * @param Title $redirTitle The title which has changed, redirects
+	 *   pointing to this title are fixed
+	 * @param bool $destTitle Not used
+	 */
+	public static function fixRedirects( $reason, $redirTitle, $destTitle = false ) {
+		# Need to use the master to get the redirect table updated in the same transaction
+		$dbw = wfGetDB( DB_MASTER );
+		$res = $dbw->select(
+			array( 'redirect', 'page' ),
+			array( 'page_namespace', 'page_title' ),
+			array(
+				'page_id = rd_from',
+				'rd_namespace' => $redirTitle->getNamespace(),
+				'rd_title' => $redirTitle->getDBkey()
+			), __METHOD__ );
+		if ( !$res->numRows() ) {
+			return;
+		}
+		$jobs = array();
+		foreach ( $res as $row ) {
+			$title = Title::makeTitle( $row->page_namespace, $row->page_title );
+			if ( !$title ) {
+				continue;
+			}
+
+			$jobs[] = new self( $title, array(
+				'reason' => $reason,
+				'redirTitle' => $redirTitle->getPrefixedDBkey() ) );
+			# Avoid excessive memory usage
+			if ( count( $jobs ) > 10000 ) {
+				JobQueueGroup::singleton()->push( $jobs );
+				$jobs = array();
+			}
+		}
+		JobQueueGroup::singleton()->push( $jobs );
+	}
+
+	/**
+	 * @param Title $title
+	 * @param array|bool $params
+	 */
+	function __construct( $title, $params = false ) {
+		parent::__construct( 'fixDoubleRedirect', $title, $params );
+		$this->reason = $params['reason'];
+		$this->redirTitle = Title::newFromText( $params['redirTitle'] );
+	}
+
+	/**
+	 * @return bool
+	 */
+	function run() {
+		if ( !$this->redirTitle ) {
+			$this->setLastError( 'Invalid title' );
+
+			return false;
+		}
+
+		$targetRev = Revision::newFromTitle( $this->title, false, Revision::READ_LATEST );
+		if ( !$targetRev ) {
+			wfDebug( __METHOD__ . ": target redirect already deleted, ignoring\n" );
+
+			return true;
+		}
+		$content = $targetRev->getContent();
+		$currentDest = $content ? $content->getRedirectTarget() : null;
+		if ( !$currentDest || !$currentDest->equals( $this->redirTitle ) ) {
+			wfDebug( __METHOD__ . ": Redirect has changed since the job was queued\n" );
+
+			return true;
+		}
+
+		// Check for a suppression tag (used e.g. in periodically archived discussions)
+		$mw = MagicWord::get( 'staticredirect' );
+		if ( $content->matchMagicWord( $mw ) ) {
+			wfDebug( __METHOD__ . ": skipping: suppressed with __STATICREDIRECT__\n" );
+
+			return true;
+		}
+
+		// Find the current final destination
+		$newTitle = self::getFinalDestination( $this->redirTitle );
+		if ( !$newTitle ) {
+			wfDebug( __METHOD__ .
+				": skipping: single redirect, circular redirect or invalid redirect destination\n" );
+
+			return true;
+		}
+		if ( $newTitle->equals( $this->redirTitle ) ) {
+			// The redirect is already right, no need to change it
+			// This can happen if the page was moved back (say after vandalism)
+			wfDebug( __METHOD__ . " : skipping, already good\n" );
+		}
+
+		// Preserve fragment (bug 14904)
+		$newTitle = Title::makeTitle( $newTitle->getNamespace(), $newTitle->getDBkey(),
+			$currentDest->getFragment(), $newTitle->getInterwiki() );
+
+		// Fix the text
+		$newContent = $content->updateRedirect( $newTitle );
+
+		if ( $newContent->equals( $content ) ) {
+			$this->setLastError( 'Content unchanged???' );
+
+			return false;
+		}
+
+		$user = $this->getUser();
+		if ( !$user ) {
+			$this->setLastError( 'Invalid user' );
+
+			return false;
+		}
+
+		// Save it
+		global $wgUser;
+		$oldUser = $wgUser;
+		$wgUser = $user;
+		$article = WikiPage::factory( $this->title );
+
+		// Messages: double-redirect-fixed-move, double-redirect-fixed-maintenance
+		$reason = wfMessage( 'double-redirect-fixed-' . $this->reason,
+			$this->redirTitle->getPrefixedText(), $newTitle->getPrefixedText()
+		)->inContentLanguage()->text();
+		$article->doEditContent( $newContent, $reason, EDIT_UPDATE | EDIT_SUPPRESS_RC, false, $user );
+		$wgUser = $oldUser;
+
+		return true;
+	}
+
+	/**
+	 * Get the final destination of a redirect
+	 *
+	 * @param Title $title
+	 *
+	 * @return bool If the specified title is not a redirect, or if it is a circular redirect
+	 */
+	public static function getFinalDestination( $title ) {
+		$dbw = wfGetDB( DB_MASTER );
+
+		// Circular redirect check
+		$seenTitles = array();
+		$dest = false;
+
+		while ( true ) {
+			$titleText = $title->getPrefixedDBkey();
+			if ( isset( $seenTitles[$titleText] ) ) {
+				wfDebug( __METHOD__, "Circular redirect detected, aborting\n" );
+
+				return false;
+			}
+			$seenTitles[$titleText] = true;
+
+			if ( $title->isExternal() ) {
+				// If the target is interwiki, we have to break early (bug 40352).
+				// Otherwise it will look up a row in the local page table
+				// with the namespace/page of the interwiki target which can cause
+				// unexpected results (e.g. X -> foo:Bar -> Bar -> .. )
+				break;
+			}
+
+			$row = $dbw->selectRow(
+				array( 'redirect', 'page' ),
+				array( 'rd_namespace', 'rd_title', 'rd_interwiki' ),
+				array(
+					'rd_from=page_id',
+					'page_namespace' => $title->getNamespace(),
+					'page_title' => $title->getDBkey()
+				), __METHOD__ );
+			if ( !$row ) {
+				# No redirect from here, chain terminates
+				break;
+			} else {
+				$dest = $title = Title::makeTitle(
+					$row->rd_namespace,
+					$row->rd_title,
+					'',
+					$row->rd_interwiki
+				);
+			}
+		}
+
+		return $dest;
+	}
+
+	/**
+	 * Get a user object for doing edits, from a request-lifetime cache
+	 * False will be returned if the user name specified in the
+	 * 'double-redirect-fixer' message is invalid.
+	 *
+	 * @return User|bool
+	 */
+	function getUser() {
+		if ( !self::$user ) {
+			$username = wfMessage( 'double-redirect-fixer' )->inContentLanguage()->text();
+			self::$user = User::newFromName( $username );
+			# User::newFromName() can return false on a badly configured wiki.
+			if ( self::$user && !self::$user->isLoggedIn() ) {
+				self::$user->addToDatabase();
+			}
+		}
+
+		return self::$user;
+	}
+}