execute(); } /** * Used to show archived pages and eventually restore them. * @addtogroup SpecialPage */ class PageArchive { protected $title; var $fileStatus; function __construct( $title ) { if( is_null( $title ) ) { throw new MWException( 'Archiver() given a null title.'); } $this->title = $title; } /** * List all deleted pages recorded in the archive table. Returns result * wrapper with (ar_namespace, ar_title, count) fields, ordered by page * namespace/title. * * @return ResultWrapper */ public static function listAllPages() { $dbr = wfGetDB( DB_SLAVE ); return self::listPages( $dbr, '' ); } /** * List deleted pages recorded in the archive table matching the * given title prefix. * Returns result wrapper with (ar_namespace, ar_title, count) fields. * * @return ResultWrapper */ public static function listPagesByPrefix( $prefix ) { $dbr = wfGetDB( DB_SLAVE ); $title = Title::newFromText( $prefix ); if( $title ) { $ns = $title->getNamespace(); $encPrefix = $dbr->escapeLike( $title->getDbKey() ); } else { // Prolly won't work too good // @todo handle bare namespace names cleanly? $ns = 0; $encPrefix = $dbr->escapeLike( $prefix ); } $conds = array( 'ar_namespace' => $ns, "ar_title LIKE '$encPrefix%'", ); return self::listPages( $dbr, $conds ); } protected static function listPages( $dbr, $condition ) { return $dbr->resultObject( $dbr->select( array( 'archive' ), array( 'ar_namespace', 'ar_title', 'COUNT(*) AS count', ), $condition, __METHOD__, array( 'GROUP BY' => 'ar_namespace,ar_title', 'ORDER BY' => 'ar_namespace,ar_title', 'LIMIT' => 100, ) ) ); } /** * List the revisions of the given page. Returns result wrapper with * (ar_minor_edit, ar_timestamp, ar_user, ar_user_text, ar_comment) fields. * * @return ResultWrapper */ function listRevisions() { $dbr = wfGetDB( DB_SLAVE ); $res = $dbr->select( 'archive', array( 'ar_minor_edit', 'ar_timestamp', 'ar_user', 'ar_user_text', 'ar_comment', 'ar_len' ), array( 'ar_namespace' => $this->title->getNamespace(), 'ar_title' => $this->title->getDBkey() ), 'PageArchive::listRevisions', array( 'ORDER BY' => 'ar_timestamp DESC' ) ); $ret = $dbr->resultObject( $res ); return $ret; } /** * List the deleted file revisions for this page, if it's a file page. * Returns a result wrapper with various filearchive fields, or null * if not a file page. * * @return ResultWrapper * @todo Does this belong in Image for fuller encapsulation? */ function listFiles() { if( $this->title->getNamespace() == NS_IMAGE ) { $dbr = wfGetDB( DB_SLAVE ); $res = $dbr->select( 'filearchive', array( 'fa_id', 'fa_name', 'fa_storage_key', 'fa_size', 'fa_width', 'fa_height', 'fa_description', 'fa_user', 'fa_user_text', 'fa_timestamp' ), array( 'fa_name' => $this->title->getDbKey() ), __METHOD__, array( 'ORDER BY' => 'fa_timestamp DESC' ) ); $ret = $dbr->resultObject( $res ); return $ret; } return null; } /** * Fetch (and decompress if necessary) the stored text for the deleted * revision of the page with the given timestamp. * * @return string * @deprecated Use getRevision() for more flexible information */ function getRevisionText( $timestamp ) { $rev = $this->getRevision( $timestamp ); return $rev ? $rev->getText() : null; } /** * Return a Revision object containing data for the deleted revision. * Note that the result *may* or *may not* have a null page ID. * @param string $timestamp * @return Revision */ function getRevision( $timestamp ) { $dbr = wfGetDB( DB_SLAVE ); $row = $dbr->selectRow( 'archive', array( 'ar_rev_id', 'ar_text', 'ar_comment', 'ar_user', 'ar_user_text', 'ar_timestamp', 'ar_minor_edit', 'ar_flags', 'ar_text_id', 'ar_len' ), array( 'ar_namespace' => $this->title->getNamespace(), 'ar_title' => $this->title->getDbkey(), 'ar_timestamp' => $dbr->timestamp( $timestamp ) ), __METHOD__ ); if( $row ) { return new Revision( array( 'page' => $this->title->getArticleId(), 'id' => $row->ar_rev_id, 'text' => ($row->ar_text_id ? null : Revision::getRevisionText( $row, 'ar_' ) ), 'comment' => $row->ar_comment, 'user' => $row->ar_user, 'user_text' => $row->ar_user_text, 'timestamp' => $row->ar_timestamp, 'minor_edit' => $row->ar_minor_edit, 'text_id' => $row->ar_text_id ) ); } else { return null; } } /** * Get the text from an archive row containing ar_text, ar_flags and ar_text_id */ function getTextFromRow( $row ) { if( is_null( $row->ar_text_id ) ) { // An old row from MediaWiki 1.4 or previous. // Text is embedded in this row in classic compression format. return Revision::getRevisionText( $row, "ar_" ); } else { // New-style: keyed to the text storage backend. $dbr = wfGetDB( DB_SLAVE ); $text = $dbr->selectRow( 'text', array( 'old_text', 'old_flags' ), array( 'old_id' => $row->ar_text_id ), __METHOD__ ); return Revision::getRevisionText( $text ); } } /** * Fetch (and decompress if necessary) the stored text of the most * recently edited deleted revision of the page. * * If there are no archived revisions for the page, returns NULL. * * @return string */ function getLastRevisionText() { $dbr = wfGetDB( DB_SLAVE ); $row = $dbr->selectRow( 'archive', array( 'ar_text', 'ar_flags', 'ar_text_id' ), array( 'ar_namespace' => $this->title->getNamespace(), 'ar_title' => $this->title->getDBkey() ), 'PageArchive::getLastRevisionText', array( 'ORDER BY' => 'ar_timestamp DESC' ) ); if( $row ) { return $this->getTextFromRow( $row ); } else { return NULL; } } /** * Quick check if any archived revisions are present for the page. * @return bool */ function isDeleted() { $dbr = wfGetDB( DB_SLAVE ); $n = $dbr->selectField( 'archive', 'COUNT(ar_title)', array( 'ar_namespace' => $this->title->getNamespace(), 'ar_title' => $this->title->getDBkey() ) ); return ($n > 0); } /** * Restore the given (or all) text and file revisions for the page. * Once restored, the items will be removed from the archive tables. * The deletion log will be updated with an undeletion notice. * * @param array $timestamps Pass an empty array to restore all revisions, otherwise list the ones to undelete. * @param string $comment * @param array $fileVersions * * @return true on success. */ function undelete( $timestamps, $comment = '', $fileVersions = array() ) { // If both the set of text revisions and file revisions are empty, // restore everything. Otherwise, just restore the requested items. $restoreAll = empty( $timestamps ) && empty( $fileVersions ); $restoreText = $restoreAll || !empty( $timestamps ); $restoreFiles = $restoreAll || !empty( $fileVersions ); if( $restoreFiles && $this->title->getNamespace() == NS_IMAGE ) { $img = wfLocalFile( $this->title ); $this->fileStatus = $img->restore( $fileVersions ); $filesRestored = $this->fileStatus->successCount; } else { $filesRestored = 0; } if( $restoreText ) { $textRestored = $this->undeleteRevisions( $timestamps ); } else { $textRestored = 0; } // Touch the log! global $wgContLang; $log = new LogPage( 'delete' ); if( $textRestored && $filesRestored ) { $reason = wfMsgForContent( 'undeletedrevisions-files', $wgContLang->formatNum( $textRestored ), $wgContLang->formatNum( $filesRestored ) ); } elseif( $textRestored ) { $reason = wfMsgForContent( 'undeletedrevisions', $wgContLang->formatNum( $textRestored ) ); } elseif( $filesRestored ) { $reason = wfMsgForContent( 'undeletedfiles', $wgContLang->formatNum( $filesRestored ) ); } else { wfDebug( "Undelete: nothing undeleted...\n" ); return false; } if( trim( $comment ) != '' ) $reason .= ": {$comment}"; $log->addEntry( 'restore', $this->title, $reason ); if ( $this->fileStatus && !$this->fileStatus->ok ) { return false; } else { return true; } } /** * This is the meaty bit -- restores archived revisions of the given page * to the cur/old tables. If the page currently exists, all revisions will * be stuffed into old, otherwise the most recent will go into cur. * * @param array $timestamps Pass an empty array to restore all revisions, otherwise list the ones to undelete. * @param string $comment * @param array $fileVersions * * @return int number of revisions restored */ private function undeleteRevisions( $timestamps ) { $restoreAll = empty( $timestamps ); $dbw = wfGetDB( DB_MASTER ); # Does this page already exist? We'll have to update it... $article = new Article( $this->title ); $options = 'FOR UPDATE'; $page = $dbw->selectRow( 'page', array( 'page_id', 'page_latest' ), array( 'page_namespace' => $this->title->getNamespace(), 'page_title' => $this->title->getDBkey() ), __METHOD__, $options ); if( $page ) { # Page already exists. Import the history, and if necessary # we'll update the latest revision field in the record. $newid = 0; $pageId = $page->page_id; $previousRevId = $page->page_latest; } else { # Have to create a new article... $newid = $article->insertOn( $dbw ); $pageId = $newid; $previousRevId = 0; } if( $restoreAll ) { $oldones = '1 = 1'; # All revisions... } else { $oldts = implode( ',', array_map( array( &$dbw, 'addQuotes' ), array_map( array( &$dbw, 'timestamp' ), $timestamps ) ) ); $oldones = "ar_timestamp IN ( {$oldts} )"; } /** * Restore each revision... */ $result = $dbw->select( 'archive', /* fields */ array( 'ar_rev_id', 'ar_text', 'ar_comment', 'ar_user', 'ar_user_text', 'ar_timestamp', 'ar_minor_edit', 'ar_flags', 'ar_text_id', 'ar_len' ), /* WHERE */ array( 'ar_namespace' => $this->title->getNamespace(), 'ar_title' => $this->title->getDBkey(), $oldones ), __METHOD__, /* options */ array( 'ORDER BY' => 'ar_timestamp' ) ); if( $dbw->numRows( $result ) < count( $timestamps ) ) { wfDebug( __METHOD__.": couldn't find all requested rows\n" ); return false; } $revision = null; $restored = 0; while( $row = $dbw->fetchObject( $result ) ) { if( $row->ar_text_id ) { // Revision was deleted in 1.5+; text is in // the regular text table, use the reference. // Specify null here so the so the text is // dereferenced for page length info if needed. $revText = null; } else { // Revision was deleted in 1.4 or earlier. // Text is squashed into the archive row, and // a new text table entry will be created for it. $revText = Revision::getRevisionText( $row, 'ar_' ); } $revision = new Revision( array( 'page' => $pageId, 'id' => $row->ar_rev_id, 'text' => $revText, 'comment' => $row->ar_comment, 'user' => $row->ar_user, 'user_text' => $row->ar_user_text, 'timestamp' => $row->ar_timestamp, 'minor_edit' => $row->ar_minor_edit, 'text_id' => $row->ar_text_id, 'len' => $row->ar_len ) ); $revision->insertOn( $dbw ); $restored++; } if( $revision ) { // Attach the latest revision to the page... $wasnew = $article->updateIfNewerOn( $dbw, $revision, $previousRevId ); if( $newid || $wasnew ) { // Update site stats, link tables, etc $article->createUpdates( $revision ); } if( $newid ) { wfRunHooks( 'ArticleUndelete', array( &$this->title, true ) ); Article::onArticleCreate( $this->title ); } else { wfRunHooks( 'ArticleUndelete', array( &$this->title, false ) ); Article::onArticleEdit( $this->title ); } } else { # Something went terribly wrong! } # Now that it's safely stored, take it out of the archive $dbw->delete( 'archive', /* WHERE */ array( 'ar_namespace' => $this->title->getNamespace(), 'ar_title' => $this->title->getDBkey(), $oldones ), __METHOD__ ); return $restored; } function getFileStatus() { return $this->fileStatus; } } /** * The HTML form for Special:Undelete, which allows users with the appropriate * permissions to view and restore deleted content. * @addtogroup SpecialPage */ class UndeleteForm { var $mAction, $mTarget, $mTimestamp, $mRestore, $mTargetObj; var $mTargetTimestamp, $mAllowed, $mComment; function UndeleteForm( $request, $par = "" ) { global $wgUser; $this->mAction = $request->getVal( 'action' ); $this->mTarget = $request->getVal( 'target' ); $this->mSearchPrefix = $request->getText( 'prefix' ); $time = $request->getVal( 'timestamp' ); $this->mTimestamp = $time ? wfTimestamp( TS_MW, $time ) : ''; $this->mFile = $request->getVal( 'file' ); $posted = $request->wasPosted() && $wgUser->matchEditToken( $request->getVal( 'wpEditToken' ) ); $this->mRestore = $request->getCheck( 'restore' ) && $posted; $this->mPreview = $request->getCheck( 'preview' ) && $posted; $this->mComment = $request->getText( 'wpComment' ); if( $par != "" ) { $this->mTarget = $par; } if ( $wgUser->isAllowed( 'delete' ) && !$wgUser->isBlocked() ) { $this->mAllowed = true; } else { $this->mAllowed = false; $this->mTimestamp = ''; $this->mRestore = false; } if ( $this->mTarget !== "" ) { $this->mTargetObj = Title::newFromURL( $this->mTarget ); } else { $this->mTargetObj = NULL; } if( $this->mRestore ) { $timestamps = array(); $this->mFileVersions = array(); foreach( $_REQUEST as $key => $val ) { $matches = array(); if( preg_match( '/^ts(\d{14})$/', $key, $matches ) ) { array_push( $timestamps, $matches[1] ); } if( preg_match( '/^fileid(\d+)$/', $key, $matches ) ) { $this->mFileVersions[] = intval( $matches[1] ); } } rsort( $timestamps ); $this->mTargetTimestamp = $timestamps; } } function execute() { global $wgOut; if ( $this->mAllowed ) { $wgOut->setPagetitle( wfMsg( "undeletepage" ) ); } else { $wgOut->setPagetitle( wfMsg( "viewdeletedpage" ) ); } if( is_null( $this->mTargetObj ) ) { $this->showSearchForm(); # List undeletable articles if( $this->mSearchPrefix ) { $result = PageArchive::listPagesByPrefix( $this->mSearchPrefix ); $this->showList( $result ); } return; } if( $this->mTimestamp !== '' ) { return $this->showRevision( $this->mTimestamp ); } if( $this->mFile !== null ) { return $this->showFile( $this->mFile ); } if( $this->mRestore && $this->mAction == "submit" ) { return $this->undelete(); } return $this->showHistory(); } function showSearchForm() { global $wgOut, $wgScript; $wgOut->addWikiText( wfMsg( 'undelete-header' ) ); $wgOut->addHtml( Xml::openElement( 'form', array( 'method' => 'get', 'action' => $wgScript ) ) . '
' . '' ); } /* private */ function showList( $result ) { global $wgLang, $wgContLang, $wgUser, $wgOut; if( $result->numRows() == 0 ) { $wgOut->addWikiText( wfMsg( 'undelete-no-results' ) ); return; } $wgOut->addWikiText( wfMsg( "undeletepagetext" ) ); $sk = $wgUser->getSkin(); $undelete = SpecialPage::getTitleFor( 'Undelete' ); $wgOut->addHTML( "' . wfMsgHtml( 'undelete-revision', $link, $time, $user ) . '
' ); wfRunHooks( 'UndeleteShowRevision', array( $this->mTargetObj, $rev ) ); if( $this->mPreview ) { $wgOut->addHtml( "