diff options
Diffstat (limited to 'includes/specials/SpecialUndelete.php')
| -rw-r--r-- | includes/specials/SpecialUndelete.php | 1276 |
1 files changed, 1276 insertions, 0 deletions
diff --git a/includes/specials/SpecialUndelete.php b/includes/specials/SpecialUndelete.php new file mode 100644 index 00000000..fbbf89d6 --- /dev/null +++ b/includes/specials/SpecialUndelete.php @@ -0,0 +1,1276 @@ +<?php + +/** + * Special page allowing users with the appropriate permissions to view + * and restore deleted content + * + * @file + * @ingroup SpecialPage + */ + +/** + * Constructor + */ +function wfSpecialUndelete( $par ) { + global $wgRequest; + + $form = new UndeleteForm( $wgRequest, $par ); + $form->execute(); +} + +/** + * Used to show archived pages and eventually restore them. + * @ingroup 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', 'ar_deleted' ), + 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_archive_name', + 'fa_storage_key', + 'fa_storage_group', + 'fa_size', + 'fa_width', + 'fa_height', + 'fa_bits', + 'fa_metadata', + 'fa_media_type', + 'fa_major_mime', + 'fa_minor_mime', + 'fa_description', + 'fa_user', + 'fa_user_text', + 'fa_timestamp', + 'fa_deleted' ), + 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_deleted', + '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, + 'deleted' => $row->ar_deleted, + 'len' => $row->ar_len) ); + } else { + return null; + } + } + + /** + * Return the most-previous revision, either live or deleted, against + * the deleted revision given by timestamp. + * + * May produce unexpected results in case of history merges or other + * unusual time issues. + * + * @param string $timestamp + * @return Revision or null + */ + function getPreviousRevision( $timestamp ) { + $dbr = wfGetDB( DB_SLAVE ); + + // Check the previous deleted revision... + $row = $dbr->selectRow( 'archive', + 'ar_timestamp', + array( 'ar_namespace' => $this->title->getNamespace(), + 'ar_title' => $this->title->getDBkey(), + 'ar_timestamp < ' . + $dbr->addQuotes( $dbr->timestamp( $timestamp ) ) ), + __METHOD__, + array( + 'ORDER BY' => 'ar_timestamp DESC', + 'LIMIT' => 1 ) ); + $prevDeleted = $row ? wfTimestamp( TS_MW, $row->ar_timestamp ) : false; + + $row = $dbr->selectRow( array( 'page', 'revision' ), + array( 'rev_id', 'rev_timestamp' ), + array( + 'page_namespace' => $this->title->getNamespace(), + 'page_title' => $this->title->getDBkey(), + 'page_id = rev_page', + 'rev_timestamp < ' . + $dbr->addQuotes( $dbr->timestamp( $timestamp ) ) ), + __METHOD__, + array( + 'ORDER BY' => 'rev_timestamp DESC', + 'LIMIT' => 1 ) ); + $prevLive = $row ? wfTimestamp( TS_MW, $row->rev_timestamp ) : false; + $prevLiveId = $row ? intval( $row->rev_id ) : null; + + if( $prevLive && $prevLive > $prevDeleted ) { + // Most prior revision was live + return Revision::newFromId( $prevLiveId ); + } elseif( $prevDeleted ) { + // Most prior revision was deleted + return $this->getRevision( $prevDeleted ); + } else { + // No prior revision on this page. + 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 + * @param bool $unsuppress + * + * @return array(number of file revisions restored, number of image revisions restored, log message) + * on success, false on failure + */ + function undelete( $timestamps, $comment = '', $fileVersions = array(), $unsuppress = false ) { + // 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, $unsuppress ); + $filesRestored = $this->fileStatus->successCount; + } else { + $filesRestored = 0; + } + + if( $restoreText ) { + $textRestored = $this->undeleteRevisions( $timestamps, $unsuppress ); + if($textRestored === false) // It must be one of UNDELETE_* + return false; + } else { + $textRestored = 0; + } + + // Touch the log! + global $wgContLang; + $log = new LogPage( 'delete' ); + + if( $textRestored && $filesRestored ) { + $reason = wfMsgExt( 'undeletedrevisions-files', array( 'content', 'parsemag' ), + $wgContLang->formatNum( $textRestored ), + $wgContLang->formatNum( $filesRestored ) ); + } elseif( $textRestored ) { + $reason = wfMsgExt( 'undeletedrevisions', array( 'content', 'parsemag' ), + $wgContLang->formatNum( $textRestored ) ); + } elseif( $filesRestored ) { + $reason = wfMsgExt( 'undeletedfiles', array( 'content', 'parsemag' ), + $wgContLang->formatNum( $filesRestored ) ); + } else { + wfDebug( "Undelete: nothing undeleted...\n" ); + return false; + } + + if( trim( $comment ) != '' ) + $reason .= ": {$comment}"; + $log->addEntry( 'restore', $this->title, $reason ); + + return array($textRestored, $filesRestored, $reason); + } + + /** + * 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 + * @param bool $unsuppress, remove all ar_deleted/fa_deleted restrictions of seletected revs + * + * @return mixed number of revisions restored or false on failure + */ + private function undeleteRevisions( $timestamps, $unsuppress = false ) { + if ( wfReadOnly() ) + return false; + $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 ) { + $makepage = false; + # 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; + # Get the time span of this page + $previousTimestamp = $dbw->selectField( 'revision', 'rev_timestamp', + array( 'rev_id' => $previousRevId ), + __METHOD__ ); + if( $previousTimestamp === false ) { + wfDebug( __METHOD__.": existing page refers to a page_latest that does not exist\n" ); + return 0; + } + } else { + # Have to create a new article... + $makepage = true; + $previousRevId = 0; + $previousTimestamp = 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} )"; + } + + /** + * Select each archived 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_deleted', + 'ar_page_id', + 'ar_len' ), + /* WHERE */ array( + 'ar_namespace' => $this->title->getNamespace(), + 'ar_title' => $this->title->getDBkey(), + $oldones ), + __METHOD__, + /* options */ array( + 'ORDER BY' => 'ar_timestamp' ) + ); + $ret = $dbw->resultObject( $result ); + + $rev_count = $dbw->numRows( $result ); + if( $rev_count ) { + # We need to seek around as just using DESC in the ORDER BY + # would leave the revisions inserted in the wrong order + $first = $ret->fetchObject(); + $ret->seek( $rev_count - 1 ); + $last = $ret->fetchObject(); + // We don't handle well changing the top revision's settings + if( !$unsuppress && $last->ar_deleted && $last->ar_timestamp > $previousTimestamp ) { + wfDebug( __METHOD__.": restoration would result in a deleted top revision\n" ); + return false; + } + $ret->seek( 0 ); + } + + if( $makepage ) { + $newid = $article->insertOn( $dbw ); + $pageId = $newid; + } + + $revision = null; + $restored = 0; + + while( $row = $ret->fetchObject() ) { + 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, + 'deleted' => $unsuppress ? 0 : $row->ar_deleted, + 'len' => $row->ar_len + ) ); + $revision->insertOn( $dbw ); + $restored++; + + wfRunHooks( 'ArticleRevisionUndeleted', array( &$this->title, $revision, $row->ar_page_id ) ); + } + // Was anything restored at all? + if($restored == 0) + return 0; + + 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 ); + } + + if( $this->title->getNamespace() == NS_IMAGE ) { + $update = new HTMLCacheUpdate( $this->title, 'imagelinks' ); + $update->doUpdate(); + } + } else { + // Revision couldn't be created. This is very weird + return self::UNDELETE_UNKNOWNERR; + } + + # 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. + * @ingroup 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->mDiff = $request->getCheck( 'diff' ); + $this->mComment = $request->getText( 'wpComment' ); + $this->mUnsuppress = $request->getVal( 'wpUnsuppress' ) && $wgUser->isAllowed( 'suppressrevision' ); + + if( $par != "" ) { + $this->mTarget = $par; + } + if ( $wgUser->isAllowed( 'undelete' ) && !$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, $wgUser; + if ( $this->mAllowed ) { + $wgOut->setPagetitle( wfMsg( "undeletepage" ) ); + } else { + $wgOut->setPagetitle( wfMsg( "viewdeletedpage" ) ); + } + + if( is_null( $this->mTargetObj ) ) { + # Not all users can just browse every deleted page from the list + if( $wgUser->isAllowed( 'browsearchive' ) ) { + $this->showSearchForm(); + + # List undeletable articles + if( $this->mSearchPrefix ) { + $result = PageArchive::listPagesByPrefix( $this->mSearchPrefix ); + $this->showList( $result ); + } + } else { + $wgOut->addWikiText( wfMsgHtml( 'undelete-header' ) ); + } + return; + } + if( $this->mTimestamp !== '' ) { + return $this->showRevision( $this->mTimestamp ); + } + if( $this->mFile !== null ) { + $file = new ArchivedFile( $this->mTargetObj, '', $this->mFile ); + // Check if user is allowed to see this file + if( !$file->userCan( File::DELETED_FILE ) ) { + $wgOut->permissionRequired( 'suppressrevision' ); + return false; + } else { + return $this->showFile( $this->mFile ); + } + } + if( $this->mRestore && $this->mAction == "submit" ) { + return $this->undelete(); + } + return $this->showHistory(); + } + + function showSearchForm() { + global $wgOut, $wgScript; + $wgOut->addWikiMsg( 'undelete-header' ); + + $wgOut->addHtml( + Xml::openElement( 'form', array( + 'method' => 'get', + 'action' => $wgScript ) ) . + '<fieldset>' . + Xml::element( 'legend', array(), + wfMsg( 'undelete-search-box' ) ) . + Xml::hidden( 'title', + SpecialPage::getTitleFor( 'Undelete' )->getPrefixedDbKey() ) . + Xml::inputLabel( wfMsg( 'undelete-search-prefix' ), + 'prefix', 'prefix', 20, + $this->mSearchPrefix ) . + Xml::submitButton( wfMsg( 'undelete-search-submit' ) ) . + '</fieldset>' . + '</form>' ); + } + + // Generic list of deleted pages + private function showList( $result ) { + global $wgLang, $wgContLang, $wgUser, $wgOut; + + if( $result->numRows() == 0 ) { + $wgOut->addWikiMsg( 'undelete-no-results' ); + return; + } + + $wgOut->addWikiMsg( "undeletepagetext" ); + + $sk = $wgUser->getSkin(); + $undelete = SpecialPage::getTitleFor( 'Undelete' ); + $wgOut->addHTML( "<ul>\n" ); + while( $row = $result->fetchObject() ) { + $title = Title::makeTitleSafe( $row->ar_namespace, $row->ar_title ); + $link = $sk->makeKnownLinkObj( $undelete, htmlspecialchars( $title->getPrefixedText() ), + 'target=' . $title->getPrefixedUrl() ); + #$revs = wfMsgHtml( 'undeleterevisions', $wgLang->formatNum( $row->count ) ); + $revs = wfMsgExt( 'undeleterevisions', + array( 'parseinline' ), + $wgLang->formatNum( $row->count ) ); + $wgOut->addHtml( "<li>{$link} ({$revs})</li>\n" ); + } + $result->free(); + $wgOut->addHTML( "</ul>\n" ); + + return true; + } + + private function showRevision( $timestamp ) { + global $wgLang, $wgUser, $wgOut; + $self = SpecialPage::getTitleFor( 'Undelete' ); + $skin = $wgUser->getSkin(); + + if(!preg_match("/[0-9]{14}/",$timestamp)) return 0; + + $archive = new PageArchive( $this->mTargetObj ); + $rev = $archive->getRevision( $timestamp ); + + if( !$rev ) { + $wgOut->addWikiMsg( 'undeleterevision-missing' ); + return; + } + + if( $rev->isDeleted(Revision::DELETED_TEXT) ) { + if( !$rev->userCan(Revision::DELETED_TEXT) ) { + $wgOut->addWikiText( wfMsg( 'rev-deleted-text-permission' ) ); + return; + } else { + $wgOut->addWikiText( wfMsg( 'rev-deleted-text-view' ) ); + $wgOut->addHTML( '<br/>' ); + // and we are allowed to see... + } + } + + $wgOut->setPageTitle( wfMsg( 'undeletepage' ) ); + + $link = $skin->makeKnownLinkObj( + SpecialPage::getTitleFor( 'Undelete', $this->mTargetObj->getPrefixedDBkey() ), + htmlspecialchars( $this->mTargetObj->getPrefixedText() ) + ); + $time = htmlspecialchars( $wgLang->timeAndDate( $timestamp, true ) ); + $user = $skin->revUserTools( $rev ); + + if( $this->mDiff ) { + $previousRev = $archive->getPreviousRevision( $timestamp ); + if( $previousRev ) { + $this->showDiff( $previousRev, $rev ); + if( $wgUser->getOption( 'diffonly' ) ) { + return; + } else { + $wgOut->addHtml( '<hr />' ); + } + } else { + $wgOut->addHtml( wfMsgHtml( 'undelete-nodiff' ) ); + } + } + + $wgOut->addHtml( '<p>' . wfMsgHtml( 'undelete-revision', $link, $time, $user ) . '</p>' ); + + wfRunHooks( 'UndeleteShowRevision', array( $this->mTargetObj, $rev ) ); + + if( $this->mPreview ) { + $wgOut->addHtml( "<hr />\n" ); + + //Hide [edit]s + $popts = $wgOut->parserOptions(); + $popts->setEditSection( false ); + $wgOut->parserOptions( $popts ); + $wgOut->addWikiTextTitleTidy( $rev->revText(), $this->mTargetObj, true ); + } + + $wgOut->addHtml( + wfElement( 'textarea', array( + 'readonly' => 'readonly', + 'cols' => intval( $wgUser->getOption( 'cols' ) ), + 'rows' => intval( $wgUser->getOption( 'rows' ) ) ), + $rev->revText() . "\n" ) . + wfOpenElement( 'div' ) . + wfOpenElement( 'form', array( + 'method' => 'post', + 'action' => $self->getLocalURL( "action=submit" ) ) ) . + wfElement( 'input', array( + 'type' => 'hidden', + 'name' => 'target', + 'value' => $this->mTargetObj->getPrefixedDbKey() ) ) . + wfElement( 'input', array( + 'type' => 'hidden', + 'name' => 'timestamp', + 'value' => $timestamp ) ) . + wfElement( 'input', array( + 'type' => 'hidden', + 'name' => 'wpEditToken', + 'value' => $wgUser->editToken() ) ) . + wfElement( 'input', array( + 'type' => 'submit', + 'name' => 'preview', + 'value' => wfMsg( 'showpreview' ) ) ) . + wfElement( 'input', array( + 'name' => 'diff', + 'type' => 'submit', + 'value' => wfMsg( 'showdiff' ) ) ) . + wfCloseElement( 'form' ) . + wfCloseElement( 'div' ) ); + } + + /** + * Build a diff display between this and the previous either deleted + * or non-deleted edit. + * @param Revision $previousRev + * @param Revision $currentRev + * @return string HTML + */ + function showDiff( $previousRev, $currentRev ) { + global $wgOut, $wgUser; + + $diffEngine = new DifferenceEngine(); + $diffEngine->showDiffStyle(); + $wgOut->addHtml( + "<div>" . + "<table border='0' width='98%' cellpadding='0' cellspacing='4' class='diff'>" . + "<col class='diff-marker' />" . + "<col class='diff-content' />" . + "<col class='diff-marker' />" . + "<col class='diff-content' />" . + "<tr>" . + "<td colspan='2' width='50%' align='center' class='diff-otitle'>" . + $this->diffHeader( $previousRev ) . + "</td>" . + "<td colspan='2' width='50%' align='center' class='diff-ntitle'>" . + $this->diffHeader( $currentRev ) . + "</td>" . + "</tr>" . + $diffEngine->generateDiffBody( + $previousRev->getText(), $currentRev->getText() ) . + "</table>" . + "</div>\n" ); + + } + + private function diffHeader( $rev ) { + global $wgUser, $wgLang, $wgLang; + $sk = $wgUser->getSkin(); + $isDeleted = !( $rev->getId() && $rev->getTitle() ); + if( $isDeleted ) { + /// @fixme $rev->getTitle() is null for deleted revs...? + $targetPage = SpecialPage::getTitleFor( 'Undelete' ); + $targetQuery = 'target=' . + $this->mTargetObj->getPrefixedUrl() . + '×tamp=' . + wfTimestamp( TS_MW, $rev->getTimestamp() ); + } else { + /// @fixme getId() may return non-zero for deleted revs... + $targetPage = $rev->getTitle(); + $targetQuery = 'oldid=' . $rev->getId(); + } + return + '<div id="mw-diff-otitle1"><strong>' . + $sk->makeLinkObj( $targetPage, + wfMsgHtml( 'revisionasof', + $wgLang->timeanddate( $rev->getTimestamp(), true ) ), + $targetQuery ) . + ( $isDeleted ? ' ' . wfMsgHtml( 'deletedrev' ) : '' ) . + '</strong></div>' . + '<div id="mw-diff-otitle2">' . + $sk->revUserTools( $rev ) . '<br/>' . + '</div>' . + '<div id="mw-diff-otitle3">' . + $sk->revComment( $rev ) . '<br/>' . + '</div>'; + } + + /** + * Show a deleted file version requested by the visitor. + */ + private function showFile( $key ) { + global $wgOut, $wgRequest; + $wgOut->disable(); + + # We mustn't allow the output to be Squid cached, otherwise + # if an admin previews a deleted image, and it's cached, then + # a user without appropriate permissions can toddle off and + # nab the image, and Squid will serve it + $wgRequest->response()->header( 'Expires: ' . gmdate( 'D, d M Y H:i:s', 0 ) . ' GMT' ); + $wgRequest->response()->header( 'Cache-Control: no-cache, no-store, max-age=0, must-revalidate' ); + $wgRequest->response()->header( 'Pragma: no-cache' ); + + $store = FileStore::get( 'deleted' ); + $store->stream( $key ); + } + + private function showHistory() { + global $wgLang, $wgUser, $wgOut; + + $sk = $wgUser->getSkin(); + if( $this->mAllowed ) { + $wgOut->setPagetitle( wfMsg( "undeletepage" ) ); + } else { + $wgOut->setPagetitle( wfMsg( 'viewdeletedpage' ) ); + } + + $wgOut->addWikiText( wfMsgHtml( 'undeletepagetitle', $this->mTargetObj->getPrefixedText()) ); + + $archive = new PageArchive( $this->mTargetObj ); + /* + $text = $archive->getLastRevisionText(); + if( is_null( $text ) ) { + $wgOut->addWikiMsg( "nohistory" ); + return; + } + */ + if ( $this->mAllowed ) { + $wgOut->addWikiMsg( "undeletehistory" ); + $wgOut->addWikiMsg( "undeleterevdel" ); + } else { + $wgOut->addWikiMsg( "undeletehistorynoadmin" ); + } + + # List all stored revisions + $revisions = $archive->listRevisions(); + $files = $archive->listFiles(); + + $haveRevisions = $revisions && $revisions->numRows() > 0; + $haveFiles = $files && $files->numRows() > 0; + + # Batch existence check on user and talk pages + if( $haveRevisions ) { + $batch = new LinkBatch(); + while( $row = $revisions->fetchObject() ) { + $batch->addObj( Title::makeTitleSafe( NS_USER, $row->ar_user_text ) ); + $batch->addObj( Title::makeTitleSafe( NS_USER_TALK, $row->ar_user_text ) ); + } + $batch->execute(); + $revisions->seek( 0 ); + } + if( $haveFiles ) { + $batch = new LinkBatch(); + while( $row = $files->fetchObject() ) { + $batch->addObj( Title::makeTitleSafe( NS_USER, $row->fa_user_text ) ); + $batch->addObj( Title::makeTitleSafe( NS_USER_TALK, $row->fa_user_text ) ); + } + $batch->execute(); + $files->seek( 0 ); + } + + if ( $this->mAllowed ) { + $titleObj = SpecialPage::getTitleFor( "Undelete" ); + $action = $titleObj->getLocalURL( "action=submit" ); + # Start the form here + $top = Xml::openElement( 'form', array( 'method' => 'post', 'action' => $action, 'id' => 'undelete' ) ); + $wgOut->addHtml( $top ); + } + + # Show relevant lines from the deletion log: + $wgOut->addHTML( Xml::element( 'h2', null, LogPage::logName( 'delete' ) ) . "\n" ); + LogEventsList::showLogExtract( $wgOut, 'delete', $this->mTargetObj->getPrefixedText() ); + + if( $this->mAllowed && ( $haveRevisions || $haveFiles ) ) { + # Format the user-visible controls (comment field, submission button) + # in a nice little table + if( $wgUser->isAllowed( 'suppressrevision' ) ) { + $unsuppressBox = + "<tr> + <td> </td> + <td class='mw-input'>" . + Xml::checkLabel( wfMsg('revdelete-unsuppress'), 'wpUnsuppress', + 'mw-undelete-unsuppress', $this->mUnsuppress ). + "</td> + </tr>"; + } else { + $unsuppressBox = ""; + } + $table = + Xml::openElement( 'fieldset' ) . + Xml::element( 'legend', null, wfMsg( 'undelete-fieldset-title' ) ). + Xml::openElement( 'table', array( 'id' => 'mw-undelete-table' ) ) . + "<tr> + <td colspan='2'>" . + wfMsgWikiHtml( 'undeleteextrahelp' ) . + "</td> + </tr> + <tr> + <td class='mw-label'>" . + Xml::label( wfMsg( 'undeletecomment' ), 'wpComment' ) . + "</td> + <td class='mw-input'>" . + Xml::input( 'wpComment', 50, $this->mComment, array( 'id' => 'wpComment' ) ) . + "</td> + </tr> + <tr> + <td> </td> + <td class='mw-submit'>" . + Xml::submitButton( wfMsg( 'undeletebtn' ), array( 'name' => 'restore', 'id' => 'mw-undelete-submit' ) ) . + Xml::element( 'input', array( 'type' => 'reset', 'value' => wfMsg( 'undeletereset' ), 'id' => 'mw-undelete-reset' ) ) . + "</td> + </tr>" . + $unsuppressBox . + Xml::closeElement( 'table' ) . + Xml::closeElement( 'fieldset' ); + + $wgOut->addHtml( $table ); + } + + $wgOut->addHTML( Xml::element( 'h2', null, wfMsg( 'history' ) ) . "\n" ); + + if( $haveRevisions ) { + # The page's stored (deleted) history: + $wgOut->addHTML("<ul>"); + $target = urlencode( $this->mTarget ); + $remaining = $revisions->numRows(); + $earliestLiveTime = $this->getEarliestTime( $this->mTargetObj ); + + while( $row = $revisions->fetchObject() ) { + $remaining--; + $wgOut->addHTML( $this->formatRevisionRow( $row, $earliestLiveTime, $remaining, $sk ) ); + } + $revisions->free(); + $wgOut->addHTML("</ul>"); + } else { + $wgOut->addWikiMsg( "nohistory" ); + } + + if( $haveFiles ) { + $wgOut->addHtml( Xml::element( 'h2', null, wfMsg( 'filehist' ) ) . "\n" ); + $wgOut->addHtml( "<ul>" ); + while( $row = $files->fetchObject() ) { + $wgOut->addHTML( $this->formatFileRow( $row, $sk ) ); + } + $files->free(); + $wgOut->addHTML( "</ul>" ); + } + + if ( $this->mAllowed ) { + # Slip in the hidden controls here + $misc = Xml::hidden( 'target', $this->mTarget ); + $misc .= Xml::hidden( 'wpEditToken', $wgUser->editToken() ); + $misc .= Xml::closeElement( 'form' ); + $wgOut->addHtml( $misc ); + } + + return true; + } + + private function formatRevisionRow( $row, $earliestLiveTime, $remaining, $sk ) { + global $wgUser, $wgLang; + + $rev = new Revision( array( + 'page' => $this->mTargetObj->getArticleId(), + 'comment' => $row->ar_comment, + 'user' => $row->ar_user, + 'user_text' => $row->ar_user_text, + 'timestamp' => $row->ar_timestamp, + 'minor_edit' => $row->ar_minor_edit, + 'deleted' => $row->ar_deleted, + 'len' => $row->ar_len ) ); + + $stxt = ''; + $ts = wfTimestamp( TS_MW, $row->ar_timestamp ); + if( $this->mAllowed ) { + $checkBox = Xml::check( "ts$ts" ); + $titleObj = SpecialPage::getTitleFor( "Undelete" ); + $pageLink = $this->getPageLink( $rev, $titleObj, $ts, $sk ); + # Last link + if( !$rev->userCan( Revision::DELETED_TEXT ) ) { + $last = wfMsgHtml('diff'); + } else if( $remaining > 0 || ($earliestLiveTime && $ts > $earliestLiveTime) ) { + $last = $sk->makeKnownLinkObj( $titleObj, wfMsgHtml('diff'), + "target=" . $this->mTargetObj->getPrefixedUrl() . "×tamp=$ts&diff=prev" ); + } else { + $last = wfMsgHtml('diff'); + } + } else { + $checkBox = ''; + $pageLink = $wgLang->timeanddate( $ts, true ); + $last = wfMsgHtml('diff'); + } + $userLink = $sk->revUserTools( $rev ); + + if(!is_null($size = $row->ar_len)) { + $stxt = $sk->formatRevisionSize( $size ); + } + $comment = $sk->revComment( $rev ); + $revdlink = ''; + if( $wgUser->isAllowed( 'deleterevision' ) ) { + $revdel = SpecialPage::getTitleFor( 'Revisiondelete' ); + if( !$rev->userCan( Revision::DELETED_RESTRICTED ) ) { + // If revision was hidden from sysops + $del = wfMsgHtml('rev-delundel'); + } else { + $ts = wfTimestamp( TS_MW, $row->ar_timestamp ); + $del = $sk->makeKnownLinkObj( $revdel, + wfMsgHtml('rev-delundel'), + 'target=' . $this->mTargetObj->getPrefixedUrl() . "&artimestamp=$ts" ); + // Bolden oversighted content + if( $rev->isDeleted( Revision::DELETED_RESTRICTED ) ) + $del = "<strong>$del</strong>"; + } + $revdlink = "<tt>(<small>$del</small>)</tt>"; + } + + return "<li>$checkBox $revdlink ($last) $pageLink . . $userLink $stxt $comment</li>"; + } + + private function formatFileRow( $row, $sk ) { + global $wgUser, $wgLang; + + $file = ArchivedFile::newFromRow( $row ); + + $ts = wfTimestamp( TS_MW, $row->fa_timestamp ); + if( $this->mAllowed && $row->fa_storage_key ) { + $checkBox = Xml::check( "fileid" . $row->fa_id ); + $key = urlencode( $row->fa_storage_key ); + $target = urlencode( $this->mTarget ); + $titleObj = SpecialPage::getTitleFor( "Undelete" ); + $pageLink = $this->getFileLink( $file, $titleObj, $ts, $key, $sk ); + } else { + $checkBox = ''; + $pageLink = $wgLang->timeanddate( $ts, true ); + } + $userLink = $this->getFileUser( $file, $sk ); + $data = + wfMsg( 'widthheight', + $wgLang->formatNum( $row->fa_width ), + $wgLang->formatNum( $row->fa_height ) ) . + ' (' . + wfMsg( 'nbytes', $wgLang->formatNum( $row->fa_size ) ) . + ')'; + $data = htmlspecialchars( $data ); + $comment = $this->getFileComment( $file, $sk ); + $revdlink = ''; + if( $wgUser->isAllowed( 'deleterevision' ) ) { + $revdel = SpecialPage::getTitleFor( 'Revisiondelete' ); + if( !$file->userCan(File::DELETED_RESTRICTED ) ) { + // If revision was hidden from sysops + $del = wfMsgHtml('rev-delundel'); + } else { + $del = $sk->makeKnownLinkObj( $revdel, + wfMsgHtml('rev-delundel'), + 'target=' . $this->mTargetObj->getPrefixedUrl() . + '&fileid=' . $row->fa_id ); + // Bolden oversighted content + if( $file->isDeleted( File::DELETED_RESTRICTED ) ) + $del = "<strong>$del</strong>"; + } + $revdlink = "<tt>(<small>$del</small>)</tt>"; + } + return "<li>$checkBox $revdlink $pageLink . . $userLink $data $comment</li>\n"; + } + + private function getEarliestTime( $title ) { + $dbr = wfGetDB( DB_SLAVE ); + if( $title->exists() ) { + $min = $dbr->selectField( 'revision', + 'MIN(rev_timestamp)', + array( 'rev_page' => $title->getArticleId() ), + __METHOD__ ); + return wfTimestampOrNull( TS_MW, $min ); + } + return null; + } + + /** + * Fetch revision text link if it's available to all users + * @return string + */ + function getPageLink( $rev, $titleObj, $ts, $sk ) { + global $wgLang; + + if( !$rev->userCan(Revision::DELETED_TEXT) ) { + return '<span class="history-deleted">' . $wgLang->timeanddate( $ts, true ) . '</span>'; + } else { + $link = $sk->makeKnownLinkObj( $titleObj, $wgLang->timeanddate( $ts, true ), + "target=".$this->mTargetObj->getPrefixedUrl()."×tamp=$ts" ); + if( $rev->isDeleted(Revision::DELETED_TEXT) ) + $link = '<span class="history-deleted">' . $link . '</span>'; + return $link; + } + } + + /** + * Fetch image view link if it's available to all users + * @return string + */ + function getFileLink( $file, $titleObj, $ts, $key, $sk ) { + global $wgLang; + + if( !$file->userCan(File::DELETED_FILE) ) { + return '<span class="history-deleted">' . $wgLang->timeanddate( $ts, true ) . '</span>'; + } else { + $link = $sk->makeKnownLinkObj( $titleObj, $wgLang->timeanddate( $ts, true ), + "target=".$this->mTargetObj->getPrefixedUrl()."&file=$key" ); + if( $file->isDeleted(File::DELETED_FILE) ) + $link = '<span class="history-deleted">' . $link . '</span>'; + return $link; + } + } + + /** + * Fetch file's user id if it's available to this user + * @return string + */ + function getFileUser( $file, $sk ) { + if( !$file->userCan(File::DELETED_USER) ) { + return '<span class="history-deleted">' . wfMsgHtml( 'rev-deleted-user' ) . '</span>'; + } else { + $link = $sk->userLink( $file->getRawUser(), $file->getRawUserText() ) . + $sk->userToolLinks( $file->getRawUser(), $file->getRawUserText() ); + if( $file->isDeleted(File::DELETED_USER) ) + $link = '<span class="history-deleted">' . $link . '</span>'; + return $link; + } + } + + /** + * Fetch file upload comment if it's available to this user + * @return string + */ + function getFileComment( $file, $sk ) { + if( !$file->userCan(File::DELETED_COMMENT) ) { + return '<span class="history-deleted"><span class="comment">' . wfMsgHtml( 'rev-deleted-comment' ) . '</span></span>'; + } else { + $link = $sk->commentBlock( $file->getRawDescription() ); + if( $file->isDeleted(File::DELETED_COMMENT) ) + $link = '<span class="history-deleted">' . $link . '</span>'; + return $link; + } + } + + function undelete() { + global $wgOut, $wgUser; + if ( wfReadOnly() ) { + $wgOut->readOnlyPage(); + return; + } + if( !is_null( $this->mTargetObj ) ) { + $archive = new PageArchive( $this->mTargetObj ); + $ok = $archive->undelete( + $this->mTargetTimestamp, + $this->mComment, + $this->mFileVersions, + $this->mUnsuppress ); + + if( is_array($ok) ) { + if ( $ok[1] ) // Undeleted file count + wfRunHooks( 'FileUndeleteComplete', array( + $this->mTargetObj, $this->mFileVersions, + $wgUser, $this->mComment) ); + + $skin = $wgUser->getSkin(); + $link = $skin->makeKnownLinkObj( $this->mTargetObj ); + $wgOut->addHtml( wfMsgWikiHtml( 'undeletedpage', $link ) ); + } else { + $wgOut->showFatalError( wfMsg( "cannotundelete" ) ); + $wgOut->addHtml( '<p>' . wfMsgHtml( "undeleterevdel" ) . '</p>' ); + } + + // Show file deletion warnings and errors + $status = $archive->getFileStatus(); + if( $status && !$status->isGood() ) { + $wgOut->addWikiText( $status->getWikiText( 'undelete-error-short', 'undelete-error-long' ) ); + } + } else { + $wgOut->showFatalError( wfMsg( "cannotundelete" ) ); + } + return false; + } +} |