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wiki.techinc.nl/includes/SpecialUndelete.php

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<?php
/**
* @todo document
* @package MediaWiki
* @subpackage SpecialPage
*/
/** */
require_once( 'Revision.php' );
/**
*
*/
function wfSpecialUndelete( $par ) {
global $wgRequest;
$form = new UndeleteForm( $wgRequest, $par );
$form->execute();
}
/**
*
* @package MediaWiki
* @subpackage SpecialPage
*/
class PageArchive {
var $title;
function PageArchive( &$title ) {
if( is_null( $title ) ) {
wfDebugDieBacktrace( '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. Can be called staticaly.
*
* @return ResultWrapper
*/
/* static */ function listAllPages() {
$dbr =& wfGetDB( DB_SLAVE );
$archive = $dbr->tableName( 'archive' );
$sql = "SELECT ar_namespace,ar_title, COUNT(*) AS count FROM $archive " .
"GROUP BY ar_namespace,ar_title ORDER BY ar_namespace,ar_title";
return $dbr->resultObject( $dbr->query( $sql, 'PageArchive::listAllPages' ) );
}
/**
* 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' ),
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;
}
/**
* Fetch (and decompress if necessary) the stored text for the deleted
* revision of the page with the given timestamp.
*
* @return string
*/
function getRevisionText( $timestamp ) {
$fname = 'PageArchive::getRevisionText';
$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(),
'ar_timestamp' => $dbr->timestamp( $timestamp ) ),
$fname );
return $this->getTextFromRow( $row );
}
/**
* Get the text from an archive row containing ar_text, ar_flags and ar_text_id
*/
function getTextFromRow( $row ) {
$fname = 'PageArchive::getTextFromRow';
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 ),
$fname );
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);
}
/**
* 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.
* The deletion log will be updated with an undeletion notice.
*
* Returns true on success.
*
* @param array $timestamps Pass an empty array to restore all revisions, otherwise list the ones to undelete.
* @return bool
*/
function undelete( $timestamps ) {
global $wgParser, $wgDBtype;
$fname = "doUndeleteArticle";
$restoreAll = empty( $timestamps );
$restoreRevisions = count( $timestamps );
$dbw =& wfGetDB( DB_MASTER );
extract( $dbw->tableNames( 'page', 'archive' ) );
# Does this page already exist? We'll have to update it...
$article = new Article( $this->title );
$options = ( $wgDBtype == 'PostgreSQL' )
? '' // pg doesn't support this?
: 'FOR UPDATE';
$page = $dbw->selectRow( 'page',
array( 'page_id', 'page_latest' ),
array( 'page_namespace' => $this->title->getNamespace(),
'page_title' => $this->title->getDBkey() ),
$fname,
$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' ),
/* WHERE */ array(
'ar_namespace' => $this->title->getNamespace(),
'ar_title' => $this->title->getDBkey(),
$oldones ),
$fname,
/* options */ array(
'ORDER BY' => 'ar_timestamp' )
);
$revision = null;
$newRevId = $previousRevId;
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,
) );
$newRevId = $revision->insertOn( $dbw );
}
if( $revision ) {
# FIXME: Update latest if newer as well...
if( $newid ) {
# FIXME: update article count if changed...
$article->updateRevisionOn( $dbw, $revision, $previousRevId );
# Finally, clean up the link tables
$options = new ParserOptions;
$parserOutput = $wgParser->parse( $revision->getText(), $this->title, $options,
true, true, $newRevId );
$u = new LinksUpdate( $this->title, $parserOutput );
$u->doUpdate();
#TODO: SearchUpdate, etc.
}
if( $newid ) {
Article::onArticleCreate( $this->title );
} else {
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 ),
$fname );
# Touch the log!
$log = new LogPage( 'delete' );
if( $restoreAll ) {
$reason = '';
} else {
$reason = wfMsgForContent( 'undeletedrevisions', $restoreRevisions );
}
$log->addEntry( 'restore', $this->title, $reason );
return true;
}
}
/**
*
* @package MediaWiki
* @subpackage SpecialPage
*/
class UndeleteForm {
var $mAction, $mTarget, $mTimestamp, $mRestore, $mTargetObj;
var $mTargetTimestamp, $mAllowed;
function UndeleteForm( &$request, $par = "" ) {
global $wgUser;
$this->mAction = $request->getText( 'action' );
$this->mTarget = $request->getText( 'target' );
$this->mTimestamp = $request->getText( 'timestamp' );
$posted = $request->wasPosted() &&
$wgUser->matchEditToken( $request->getVal( 'wpEditToken' ) );
$this->mRestore = $request->getCheck( 'restore' ) && $posted;
$this->mPreview = $request->getCheck( 'preview' ) && $posted;
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();
foreach( $_REQUEST as $key => $val ) {
if( preg_match( '/^ts(\d{14})$/', $key, $matches ) ) {
array_push( $timestamps, $matches[1] );
}
}
rsort( $timestamps );
$this->mTargetTimestamp = $timestamps;
}
}
function execute() {
if( is_null( $this->mTargetObj ) ) {
return $this->showList();
}
if( $this->mTimestamp !== '' ) {
return $this->showRevision( $this->mTimestamp );
}
if( $this->mRestore && $this->mAction == "submit" ) {
return $this->undelete();
}
return $this->showHistory();
}
/* private */ function showList() {
global $wgLang, $wgContLang, $wgUser, $wgOut;
$fname = "UndeleteForm::showList";
# List undeletable articles
$result = PageArchive::listAllPages();
if ( $this->mAllowed ) {
$wgOut->setPagetitle( wfMsg( "undeletepage" ) );
} else {
$wgOut->setPagetitle( wfMsg( "viewdeletedpage" ) );
}
$wgOut->addWikiText( wfMsg( "undeletepagetext" ) );
$sk = $wgUser->getSkin();
$undelete =& Title::makeTitle( NS_SPECIAL, 'Undelete' );
$wgOut->addHTML( "<ul>\n" );
while( $row = $result->fetchObject() ) {
$n = ($row->ar_namespace ?
($wgContLang->getNsText( $row->ar_namespace ) . ":") : "").
$row->ar_title;
$link = $sk->makeKnownLinkObj( $undelete,
htmlspecialchars( $n ), "target=" . urlencode( $n ) );
$revisions = htmlspecialchars( wfMsg( "undeleterevisions",
$wgLang->formatNum( $row->count ) ) );
$wgOut->addHTML( "<li>$link $revisions</li>\n" );
}
$result->free();
$wgOut->addHTML( "</ul>\n" );
return true;
}
/* private */ function showRevision( $timestamp ) {
global $wgLang, $wgUser, $wgOut;
$fname = "UndeleteForm::showRevision";
if(!preg_match("/[0-9]{14}/",$timestamp)) return 0;
$archive =& new PageArchive( $this->mTargetObj );
$text = $archive->getRevisionText( $timestamp );
$wgOut->setPagetitle( wfMsg( "undeletepage" ) );
$wgOut->addWikiText( "(" . wfMsg( "undeleterevision",
$wgLang->date( $timestamp ) ) . ")\n" );
if( $this->mPreview ) {
$wgOut->addHtml( "<hr />\n" );
$wgOut->addWikiText( $text );
}
$self = Title::makeTitle( NS_SPECIAL, "Undelete" );
$wgOut->addHtml(
wfElement( 'textarea', array(
'readonly' => true,
'cols' => intval( $wgUser->getOption( 'cols' ) ),
'rows' => intval( $wgUser->getOption( 'rows' ) ) ),
$text . "\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' => 'hidden',
'name' => 'preview',
'value' => '1' ) ) .
wfElement( 'input', array(
'type' => 'submit',
'value' => wfMsg( 'showpreview' ) ) ) .
wfCloseElement( 'form' ) .
wfCloseElement( 'div' ) );
}
/* private */ function showHistory() {
global $wgLang, $wgUser, $wgOut;
$sk = $wgUser->getSkin();
if ( $this->mAllowed ) {
$wgOut->setPagetitle( wfMsg( "undeletepage" ) );
} else {
$wgOut->setPagetitle( wfMsg( 'viewdeletedpage' ) );
}
$archive = new PageArchive( $this->mTargetObj );
$text = $archive->getLastRevisionText();
if( is_null( $text ) ) {
$wgOut->addWikiText( wfMsg( "nohistory" ) );
return;
}
if ( $this->mAllowed ) {
$wgOut->addWikiText( wfMsg( "undeletehistory" ) );
} else {
$wgOut->addWikiText( wfMsg( "undeletehistorynoadmin" ) );
}
# List all stored revisions
$revisions = $archive->listRevisions();
if ( $this->mAllowed ) {
$titleObj = Title::makeTitle( NS_SPECIAL, "Undelete" );
$action = $titleObj->escapeLocalURL( "action=submit" );
$encTarget = htmlspecialchars( $this->mTarget );
$button = htmlspecialchars( wfMsg("undeletebtn") );
$token = htmlspecialchars( $wgUser->editToken() );
$wgOut->addHTML("
<form id=\"undelete\" method=\"post\" action=\"{$action}\">
<input type=\"hidden\" name=\"target\" value=\"{$encTarget}\" />
<input type=\"submit\" name=\"restore\" value=\"{$button}\" />
<input type='hidden' name='wpEditToken' value=\"{$token}\" />
");
}
# Show relevant lines from the deletion log:
$wgOut->addHTML( "<h2>" . htmlspecialchars( LogPage::logName( 'delete' ) ) . "</h2>\n" );
require_once( 'SpecialLog.php' );
$logViewer =& new LogViewer(
new LogReader(
new FauxRequest(
array( 'page' => $this->mTargetObj->getPrefixedText(),
'type' => 'delete' ) ) ) );
$logViewer->showList( $wgOut );
# The page's stored (deleted) history:
$wgOut->addHTML( "<h2>" . htmlspecialchars( wfMsg( "history" ) ) . "</h2>\n" );
$wgOut->addHTML("<ul>");
$target = urlencode( $this->mTarget );
while( $row = $revisions->fetchObject() ) {
$ts = wfTimestamp( TS_MW, $row->ar_timestamp );
if ( $this->mAllowed ) {
$checkBox = "<input type=\"checkbox\" name=\"ts$ts\" value=\"1\" />";
$pageLink = $sk->makeKnownLinkObj( $titleObj,
$wgLang->timeanddate( $ts, true ),
"target=$target&timestamp=$ts" );
} else {
$checkBox = '';
$pageLink = $wgLang->timeanddate( $ts, true );
}
$userLink = htmlspecialchars( $row->ar_user_text );
if( $row->ar_user ) {
$userLink = $sk->makeKnownLinkObj(
Title::makeTitle( NS_USER, $row->ar_user_text ),
$userLink );
} else {
$userLink = $sk->makeKnownLinkObj(
Title::makeTitle( NS_SPECIAL, 'Contributions' ),
$userLink, 'target=' . $row->ar_user_text );
}
$comment = $sk->commentBlock( $row->ar_comment );
$wgOut->addHTML( "<li>$checkBox $pageLink . . $userLink $comment</li>\n" );
}
$revisions->free();
$wgOut->addHTML("</ul>");
if ( $this->mAllowed ) {
$wgOut->addHTML( "\n</form>" );
}
return true;
}
function undelete() {
global $wgOut;
if( !is_null( $this->mTargetObj ) ) {
$archive = new PageArchive( $this->mTargetObj );
if( $archive->undelete( $this->mTargetTimestamp ) ) {
$wgOut->addWikiText( wfMsg( "undeletedtext", $this->mTarget ) );
if (NS_IMAGE == $this->mTargetObj->getNamespace()) {
/* refresh image metadata cache */
new Image( $this->mTargetObj );
}
return true;
}
}
$wgOut->fatalError( wfMsg( "cannotundelete" ) );
return false;
}
}
?>
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