433 lines
13 KiB
PHP
433 lines
13 KiB
PHP
<?php
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/**
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*
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* @package MediaWiki
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* @subpackage SpecialPage
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*/
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/**
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*
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*/
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function wfSpecialUndelete( $par ) {
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global $wgRequest;
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$form = new UndeleteForm( $wgRequest, $par );
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$form->execute();
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}
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/**
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*
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* @package MediaWiki
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* @subpackage SpecialPage
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*/
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class PageArchive {
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var $title;
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function PageArchive( &$title ) {
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if( is_null( $title ) ) {
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wfDebugDieBacktrace( 'Archiver() given a null title.');
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}
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$this->title =& $title;
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}
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/**
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* List all deleted pages recorded in the archive table. Returns result
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* wrapper with (ar_namespace, ar_title, count) fields, ordered by page
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* namespace/title. Can be called staticaly.
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*
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* @return ResultWrapper
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*/
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/* static */ function &listAllPages() {
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$dbr =& wfGetDB( DB_SLAVE );
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$archive = $dbr->tableName( 'archive' );
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$sql = "SELECT ar_namespace,ar_title, COUNT(*) AS count FROM $archive " .
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"GROUP BY ar_namespace,ar_title ORDER BY ar_namespace,ar_title";
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return $dbr->resultObject( $dbr->query( $sql, 'PageArchive::listAllPages' ) );
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}
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/**
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* List the revisions of the given page. Returns result wrapper with
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* (ar_minor_edit, ar_timestamp, ar_user, ar_user_text, ar_comment) fields.
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*
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* @return ResultWrapper
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*/
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function &listRevisions() {
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$dbr =& wfGetDB( DB_SLAVE );
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return $dbr->resultObject( $dbr->select( 'archive',
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array( 'ar_minor_edit', 'ar_timestamp', 'ar_user', 'ar_user_text', 'ar_comment' ),
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array( 'ar_namespace' => $this->title->getNamespace(),
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'ar_title' => $this->title->getDBkey() ),
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'PageArchive::listRevisions',
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array( 'ORDER BY' => 'ar_timestamp DESC' ) ) );
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}
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/**
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* Fetch (and decompress if necessary) the stored text for the deleted
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* revision of the page with the given timestamp.
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*
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* @return string
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*/
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function getRevisionText( $timestamp ) {
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$dbr =& wfGetDB( DB_SLAVE );
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$row = $dbr->selectRow( 'archive',
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array( 'ar_text', 'ar_flags' ),
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array( 'ar_namespace' => $this->title->getNamespace(),
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'ar_title' => $this->title->getDbkey(),
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'ar_timestamp' => $dbr->timestamp( $timestamp ) ) );
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return Article::getRevisionText( $row, "ar_" );
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}
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/**
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* Fetch (and decompress if necessary) the stored text of the most
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* recently edited deleted revision of the page.
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*
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* If there are no archived revisions for the page, returns NULL.
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*
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* @return string
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*/
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function getLastRevisionText() {
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$dbr =& wfGetDB( DB_SLAVE );
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$row = $dbr->selectRow( 'archive',
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array( 'ar_text', 'ar_flags' ),
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array( 'ar_namespace' => $this->title->getNamespace(),
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'ar_title' => $this->title->getDBkey() ),
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'PageArchive::getLastRevisionText',
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'ORDER BY ar_timestamp DESC LIMIT 1' );
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if( $row ) {
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return Article::getRevisionText( $row, "ar_" );
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} else {
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return NULL;
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}
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}
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/**
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* Quick check if any archived revisions are present for the page.
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* @return bool
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*/
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function isDeleted() {
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$dbr =& wfGetDB( DB_SLAVE );
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$n = $dbr->selectField( 'archive', 'COUNT(ar_title)',
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array( 'ar_namespace' => $this->title->getNamespace(),
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'ar_title' => $this->title->getDBkey() ) );
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return ($n > 0);
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}
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/**
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* This is the meaty bit -- restores archived revisions of the given page
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* to the cur/old tables. If the page currently exists, all revisions will
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* be stuffed into old, otherwise the most recent will go into cur.
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* The deletion log will be updated with an undeletion notice.
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*
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* Returns true on success.
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*
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* @param array $timestamps Pass an empty array to restore all revisions, otherwise list the ones to undelete.
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* @return bool
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*/
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function undelete( $timestamps ) {
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global $wgUser, $wgOut, $wgLang, $wgDeferredUpdateList;
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global $wgUseSquid, $wgInternalServer, $wgLinkCache;
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$fname = "doUndeleteArticle";
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$restoreAll = empty( $timestamps );
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$restoreRevisions = count( $timestamps );
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$dbw =& wfGetDB( DB_MASTER );
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extract( $dbw->tableNames( 'cur', 'archive', 'old' ) );
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$namespace = $this->title->getNamespace();
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$ttl = $this->title->getDBkey();
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$t = $dbw->strencode( $ttl );
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# Move article and history from the "archive" table
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$sql = "SELECT COUNT(*) AS count FROM $cur WHERE cur_namespace={$namespace} AND cur_title='{$t}'";
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global $wgDBtype;
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if( $wgDBtype != 'PostgreSQL' ) { # HACKHACKHACKHACK
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$sql .= ' FOR UPDATE';
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}
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$res = $dbw->query( $sql, $fname );
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$row = $dbw->fetchObject( $res );
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$now = wfTimestampNow();
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if( $row->count == 0) {
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# Have to create new article...
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$sql = "SELECT ar_text,ar_comment,ar_user,ar_user_text,ar_timestamp,ar_minor_edit,ar_flags FROM $archive WHERE ar_namespace={$namespace} AND ar_title='{$t}' ";
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if( !$restoreAll ) {
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$max = $dbw->addQuotes( $dbw->timestamp( array_shift( $timestamps ) ) );
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$sql .= "AND ar_timestamp={$max} ";
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}
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$sql .= "ORDER BY ar_timestamp DESC LIMIT 1 FOR UPDATE";
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$res = $dbw->query( $sql, $fname );
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$s = $dbw->fetchObject( $res );
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if( $restoreAll ) {
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$max = $s->ar_timestamp;
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}
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$text = Article::getRevisionText( $s, "ar_" );
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$redirect = MagicWord::get( MAG_REDIRECT );
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$redir = $redirect->matchStart( $text ) ? 1 : 0;
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$rand = wfRandom();
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$dbw->insert( 'cur', array(
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'cur_id' => $dbw->nextSequenceValue( 'cur_cur_id_seq' ),
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'cur_namespace' => $namespace,
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'cur_title' => $ttl,
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'cur_text' => $text,
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'cur_comment' => $s->ar_comment,
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'cur_user' => $s->ar_user,
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'cur_timestamp' => $s->ar_timestamp,
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'cur_minor_edit' => $s->ar_minor_edit,
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'cur_user_text' => $s->ar_user_text,
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'cur_is_redirect' => $redir,
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'cur_random' => $rand,
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'cur_touched' => $dbw->timestamp( $now ),
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'inverse_timestamp' => wfInvertTimestamp( wfTimestamp( TS_MW, $s->ar_timestamp ) ),
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), $fname );
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$newid = $dbw->insertId();
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if( $restoreAll ) {
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$oldones = "AND ar_timestamp<" . $dbw->addQuotes( $dbw->timestamp( $max ) );
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}
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} else {
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# If already exists, put history entirely into old table
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$oldones = "";
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$newid = 0;
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# But to make the history list show up right, we need to touch it.
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$sql = "UPDATE $cur SET cur_touched='{$now}' WHERE cur_namespace={$namespace} AND cur_title='{$t}'";
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$dbw->query( $sql, $fname );
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# FIXME: Sometimes restored entries will be _newer_ than the current version.
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# We should merge.
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}
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if( !$restoreAll ) {
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$oldts = array();
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foreach( $timestamps as $ts ) {
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array_push( $oldts, $dbw->addQuotes( $dbw->timestamp( $ts ) ) );
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}
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$oldts = join( ",", $oldts );
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$oldones = "AND ar_timestamp IN ( {$oldts} )";
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}
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$sql = "INSERT INTO $old (old_namespace,old_title,old_text," .
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"old_comment,old_user,old_user_text,old_timestamp,inverse_timestamp,old_minor_edit," .
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"old_flags) SELECT ar_namespace,ar_title,ar_text,ar_comment," .
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"ar_user,ar_user_text,ar_timestamp,99999999999999-ar_timestamp,ar_minor_edit,ar_flags " .
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"FROM $archive WHERE ar_namespace={$namespace} AND ar_title='{$t}' {$oldones}";
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if( $restoreAll || !empty( $oldts ) ) {
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$dbw->query( $sql, $fname );
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}
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# Finally, clean up the link tables
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if( $newid ) {
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$wgLinkCache = new LinkCache();
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# Select for update
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$wgLinkCache->forUpdate( true );
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# Create a dummy OutputPage to update the outgoing links
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$dummyOut = new OutputPage();
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$dummyOut->addWikiText( $text );
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$u = new LinksUpdate( $newid, $this->title->getPrefixedDBkey() );
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array_push( $wgDeferredUpdateList, $u );
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Article::onArticleCreate( $this->title );
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#TODO: SearchUpdate, etc.
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}
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# Now that it's safely stored, take it out of the archive
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$sql = "DELETE FROM $archive WHERE ar_namespace={$namespace} AND " .
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"ar_title='{$t}'";
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if( !$restoreAll ) {
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$sql .= " AND ar_timestamp IN ( {$oldts}";
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if( $newid ) {
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if( !empty( $oldts ) ) $sql .= ",";
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$sql .= $max;
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}
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$sql .= ")";
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}
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$dbw->query( $sql, $fname );
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# Touch the log?
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$log = new LogPage( 'delete' );
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if( $restoreAll ) {
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$reason = "";
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} else {
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$reason = wfMsg( 'undeletedrevisions', $restoreRevisions );
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}
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$log->addEntry( 'restore', $this->title, $reason );
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return true;
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}
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}
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/**
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*
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* @package MediaWiki
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* @subpackage SpecialPage
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*/
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class UndeleteForm {
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var $mAction, $mTarget, $mTimestamp, $mRestore, $mTargetObj;
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var $mTargetTimestamp;
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function UndeleteForm( &$request, $par = "" ) {
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$this->mAction = $request->getText( 'action' );
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$this->mTarget = $request->getText( 'target' );
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$this->mTimestamp = $request->getText( 'timestamp' );
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$this->mRestore = $request->getCheck( 'restore' ) && $request->wasPosted();
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if( $par != "" ) {
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$this->mTarget = $par;
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}
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if ( $this->mTarget !== "" ) {
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$this->mTargetObj = Title::newFromURL( $this->mTarget );
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} else {
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$this->mTargetObj = NULL;
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}
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if( $this->mRestore ) {
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$timestamps = array();
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foreach( $_REQUEST as $key => $val ) {
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if( preg_match( '/^ts(\d{14})$/', $key, $matches ) ) {
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array_push( $timestamps, $matches[1] );
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}
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}
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rsort( $timestamps );
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$this->mTargetTimestamp = $timestamps;
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}
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}
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function execute() {
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if( is_null( $this->mTargetObj ) ) {
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return $this->showList();
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}
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if( $this->mTimestamp !== "" ) {
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return $this->showRevision( $this->mTimestamp );
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}
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if( $this->mRestore && $this->mAction == "submit" ) {
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return $this->undelete();
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}
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return $this->showHistory();
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}
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/* private */ function showList() {
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global $wgLang, $wgContLang, $wgUser, $wgOut;
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$fname = "UndeleteForm::showList";
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# List undeletable articles
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$result = PageArchive::listAllPages();
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$wgOut->setPagetitle( wfMsg( "undeletepage" ) );
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$wgOut->addWikiText( wfMsg( "undeletepagetext" ) );
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$sk = $wgUser->getSkin();
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$undelete =& Title::makeTitle( NS_SPECIAL, 'Undelete' );
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$wgOut->addHTML( "<ul>\n" );
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while( $row = $result->fetchObject() ) {
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$n = ($row->ar_namespace ?
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($wgContLang->getNsText( $row->ar_namespace ) . ":") : "").
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$row->ar_title;
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$link = $sk->makeKnownLinkObj( $undelete,
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htmlspecialchars( $n ), "target=" . urlencode( $n ) );
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$revisions = htmlspecialchars( wfMsg( "undeleterevisions",
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$wgLang->formatNum( $row->count ) ) );
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$wgOut->addHTML( "<li>$link $revisions</li>\n" );
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}
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$result->free();
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$wgOut->addHTML( "</ul>\n" );
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return true;
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}
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/* private */ function showRevision( $timestamp ) {
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global $wgLang, $wgUser, $wgOut;
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$fname = "UndeleteForm::showRevision";
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if(!preg_match("/[0-9]{14}/",$timestamp)) return 0;
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$archive =& new PageArchive( $this->mTargetObj );
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$text = $archive->getRevisionText( $timestamp );
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$wgOut->setPagetitle( wfMsg( "undeletepage" ) );
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$wgOut->addWikiText( "(" . wfMsg( "undeleterevision",
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$wgLang->date( $timestamp ) ) . ")\n<hr />\n" . $text );
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}
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/* private */ function showHistory() {
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global $wgLang, $wgUser, $wgOut;
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$sk = $wgUser->getSkin();
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$wgOut->setPagetitle( wfMsg( "undeletepage" ) );
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$archive = new PageArchive( $this->mTargetObj );
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$text = $archive->getLastRevisionText();
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if( is_null( $text ) ) {
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$wgOut->addWikiText( wfMsg( "nohistory" ) );
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return;
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}
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$wgOut->addWikiText( wfMsg( "undeletehistory" ) . "\n----\n" . $text );
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# List all stored revisions
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$revisions = $archive->listRevisions();
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$titleObj = Title::makeTitle( NS_SPECIAL, "Undelete" );
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$action = $titleObj->escapeLocalURL( "action=submit" );
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$encTarget = htmlspecialchars( $this->mTarget );
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$button = htmlspecialchars( wfMsg("undeletebtn") );
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$wgOut->addHTML("
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<form id=\"undelete\" method=\"post\" action=\"{$action}\">
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<input type=\"hidden\" name=\"target\" value=\"{$encTarget}\" />
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<input type=\"submit\" name=\"restore\" value=\"{$button}\" />
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");
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# Show relevant lines from the deletion log:
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$wgOut->addHTML( "<h2>" . htmlspecialchars( LogPage::logName( 'delete' ) ) . "</h2>\n" );
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require_once( 'SpecialLog.php' );
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$logViewer =& new LogViewer(
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new LogReader(
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new FauxRequest(
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array( 'page' => $this->mTargetObj->getPrefixedText(),
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'type' => 'delete' ) ) ) );
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$logViewer->showList( $wgOut );
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# The page's stored (deleted) history:
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$wgOut->addHTML( "<h2>" . htmlspecialchars( wfMsg( "history" ) ) . "</h2>\n" );
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$wgOut->addHTML("<ul>");
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$target = urlencode( $this->mTarget );
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while( $row = $revisions->fetchObject() ) {
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$ts = wfTimestamp( TS_MW, $row->ar_timestamp );
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$checkBox = "<input type=\"checkbox\" name=\"ts$ts\" value=\"1\" />";
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$pageLink = $sk->makeKnownLinkObj( $titleObj,
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$wgLang->timeanddate( $row->ar_timestamp, true ),
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"target=$target×tamp=$ts" );
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$userLink = htmlspecialchars( $row->ar_user_text );
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if( $row->ar_user ) {
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$userLink = $sk->makeKnownLinkObj(
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Title::makeTitle( NS_USER, $row->ar_user_text ),
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$userLink );
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}
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$comment = $sk->formatComment( $row->ar_comment );
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$wgOut->addHTML( "<li>$checkBox $pageLink . . $userLink (<i>$comment</i>)</li>\n" );
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}
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$revisions->free();
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$wgOut->addHTML("</ul>\n</form>");
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return true;
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}
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function undelete() {
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global $wgOut;
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if( !is_null( $this->mTargetObj ) ) {
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$archive = new PageArchive( $this->mTargetObj );
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if( $archive->undelete( $this->mTargetTimestamp ) ) {
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$wgOut->addWikiText( wfMsg( "undeletedtext", $this->mTarget ) );
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return true;
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}
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}
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$wgOut->fatalError( wfMsg( "cannotundelete" ) );
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return false;
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}
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}
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?>
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