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<?php
/**
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
* http://www.gnu.org/copyleft/gpl.html
*
* @file
*/
/**
* Handles the backend logic of moving a page from one title
* to another.
*
* @since 1.24
*/
class MovePage {
/**
* @var Title
*/
protected $oldTitle;
/**
* @var Title
*/
protected $newTitle;
public function __construct( Title $oldTitle, Title $newTitle ) {
$this->oldTitle = $oldTitle;
$this->newTitle = $newTitle;
}
public function checkPermissions( User $user, $reason ) {
$status = new Status();
$errors = wfMergeErrorArrays(
$this->oldTitle->getUserPermissionsErrors( 'move', $user ),
$this->oldTitle->getUserPermissionsErrors( 'edit', $user ),
$this->newTitle->getUserPermissionsErrors( 'move-target', $user ),
$this->newTitle->getUserPermissionsErrors( 'edit', $user )
);
// Convert into a Status object
if ( $errors ) {
foreach ( $errors as $error ) {
call_user_func_array( [ $status, 'fatal' ], $error );
}
}
if ( EditPage::matchSummarySpamRegex( $reason ) !== false ) {
// This is kind of lame, won't display nice
$status->fatal( 'spamprotectiontext' );
}
$tp = $this->newTitle->getTitleProtection();
if ( $tp !== false && !$user->isAllowed( $tp['permission'] ) ) {
$status->fatal( 'cantmove-titleprotected' );
}
Hooks::run( 'MovePageCheckPermissions',
[ $this->oldTitle, $this->newTitle, $user, $reason, $status ]
);
return $status;
}
/**
* Does various sanity checks that the move is
* valid. Only things based on the two titles
* should be checked here.
*
* @return Status
*/
public function isValidMove() {
global $wgContentHandlerUseDB;
$status = new Status();
if ( $this->oldTitle->equals( $this->newTitle ) ) {
$status->fatal( 'selfmove' );
}
if ( !$this->oldTitle->isMovable() ) {
$status->fatal( 'immobile-source-namespace', $this->oldTitle->getNsText() );
}
if ( $this->newTitle->isExternal() ) {
$status->fatal( 'immobile-target-namespace-iw' );
}
if ( !$this->newTitle->isMovable() ) {
$status->fatal( 'immobile-target-namespace', $this->newTitle->getNsText() );
}
$oldid = $this->oldTitle->getArticleID();
if ( strlen( $this->newTitle->getDBkey() ) < 1 ) {
$status->fatal( 'articleexists' );
}
if (
( $this->oldTitle->getDBkey() == '' ) ||
( !$oldid ) ||
( $this->newTitle->getDBkey() == '' )
) {
$status->fatal( 'badarticleerror' );
}
# The move is allowed only if (1) the target doesn't exist, or
# (2) the target is a redirect to the source, and has no history
# (so we can undo bad moves right after they're done).
if ( $this->newTitle->getArticleID() && !$this->isValidMoveTarget() ) {
$status->fatal( 'articleexists' );
}
// Content model checks
if ( !$wgContentHandlerUseDB &&
$this->oldTitle->getContentModel() !== $this->newTitle->getContentModel() ) {
// can't move a page if that would change the page's content model
$status->fatal(
'bad-target-model',
ContentHandler::getLocalizedName( $this->oldTitle->getContentModel() ),
ContentHandler::getLocalizedName( $this->newTitle->getContentModel() )
);
}
// Image-specific checks
if ( $this->oldTitle->inNamespace( NS_FILE ) ) {
$status->merge( $this->isValidFileMove() );
}
if ( $this->newTitle->inNamespace( NS_FILE ) && !$this->oldTitle->inNamespace( NS_FILE ) ) {
$status->fatal( 'nonfile-cannot-move-to-file' );
}
// Hook for extensions to say a title can't be moved for technical reasons
Hooks::run( 'MovePageIsValidMove', [ $this->oldTitle, $this->newTitle, $status ] );
return $status;
}
/**
* Sanity checks for when a file is being moved
*
* @return Status
*/
protected function isValidFileMove() {
$status = new Status();
$file = wfLocalFile( $this->oldTitle );
$file->load( File::READ_LATEST );
if ( $file->exists() ) {
if ( $this->newTitle->getText() != wfStripIllegalFilenameChars( $this->newTitle->getText() ) ) {
$status->fatal( 'imageinvalidfilename' );
}
if ( !File::checkExtensionCompatibility( $file, $this->newTitle->getDBkey() ) ) {
$status->fatal( 'imagetypemismatch' );
}
}
if ( !$this->newTitle->inNamespace( NS_FILE ) ) {
$status->fatal( 'imagenocrossnamespace' );
}
return $status;
}
/**
* Checks if $this can be moved to a given Title
* - Selects for update, so don't call it unless you mean business
*
* @since 1.25
* @return bool
*/
protected function isValidMoveTarget() {
# Is it an existing file?
if ( $this->newTitle->inNamespace( NS_FILE ) ) {
$file = wfLocalFile( $this->newTitle );
$file->load( File::READ_LATEST );
if ( $file->exists() ) {
wfDebug( __METHOD__ . ": file exists\n" );
return false;
}
}
# Is it a redirect with no history?
if ( !$this->newTitle->isSingleRevRedirect() ) {
wfDebug( __METHOD__ . ": not a one-rev redirect\n" );
return false;
}
# Get the article text
$rev = Revision::newFromTitle( $this->newTitle, false, Revision::READ_LATEST );
if ( !is_object( $rev ) ) {
return false;
}
$content = $rev->getContent();
# Does the redirect point to the source?
# Or is it a broken self-redirect, usually caused by namespace collisions?
$redirTitle = $content ? $content->getRedirectTarget() : null;
if ( $redirTitle ) {
if ( $redirTitle->getPrefixedDBkey() !== $this->oldTitle->getPrefixedDBkey() &&
$redirTitle->getPrefixedDBkey() !== $this->newTitle->getPrefixedDBkey() ) {
wfDebug( __METHOD__ . ": redirect points to other page\n" );
return false;
} else {
return true;
}
} else {
# Fail safe (not a redirect after all. strange.)
wfDebug( __METHOD__ . ": failsafe: database says " . $this->newTitle->getPrefixedDBkey() .
" is a redirect, but it doesn't contain a valid redirect.\n" );
return false;
}
}
/**
* @param User $user
* @param string $reason
* @param bool $createRedirect
* @return Status
*/
public function move( User $user, $reason, $createRedirect ) {
global $wgCategoryCollation;
Hooks::run( 'TitleMove', [ $this->oldTitle, $this->newTitle, $user ] );
// If it is a file, move it first.
// It is done before all other moving stuff is done because it's hard to revert.
$dbw = wfGetDB( DB_MASTER );
if ( $this->oldTitle->getNamespace() == NS_FILE ) {
$file = wfLocalFile( $this->oldTitle );
$file->load( File::READ_LATEST );
if ( $file->exists() ) {
$status = $file->move( $this->newTitle );
if ( !$status->isOK() ) {
return $status;
}
}
// Clear RepoGroup process cache
RepoGroup::singleton()->clearCache( $this->oldTitle );
RepoGroup::singleton()->clearCache( $this->newTitle ); # clear false negative cache
}
$dbw->startAtomic( __METHOD__ );
Hooks::run( 'TitleMoveStarting', [ $this->oldTitle, $this->newTitle, $user ] );
$pageid = $this->oldTitle->getArticleID( Title::GAID_FOR_UPDATE );
$protected = $this->oldTitle->isProtected();
// Do the actual move
$nullRevision = $this->moveToInternal( $user, $this->newTitle, $reason, $createRedirect );
// Refresh the sortkey for this row. Be careful to avoid resetting
// cl_timestamp, which may disturb time-based lists on some sites.
// @todo This block should be killed, it's duplicating code
// from LinksUpdate::getCategoryInsertions() and friends.
$prefixes = $dbw->select(
'categorylinks',
[ 'cl_sortkey_prefix', 'cl_to' ],
[ 'cl_from' => $pageid ],
__METHOD__
);
if ( $this->newTitle->getNamespace() == NS_CATEGORY ) {
$type = 'subcat';
} elseif ( $this->newTitle->getNamespace() == NS_FILE ) {
$type = 'file';
} else {
$type = 'page';
}
foreach ( $prefixes as $prefixRow ) {
$prefix = $prefixRow->cl_sortkey_prefix;
$catTo = $prefixRow->cl_to;
$dbw->update( 'categorylinks',
[
'cl_sortkey' => Collation::singleton()->getSortKey(
$this->newTitle->getCategorySortkey( $prefix ) ),
'cl_collation' => $wgCategoryCollation,
'cl_type' => $type,
'cl_timestamp=cl_timestamp' ],
[
'cl_from' => $pageid,
'cl_to' => $catTo ],
__METHOD__
);
}
$redirid = $this->oldTitle->getArticleID();
if ( $protected ) {
# Protect the redirect title as the title used to be...
$dbw->insertSelect( 'page_restrictions', 'page_restrictions',
[
'pr_page' => $redirid,
'pr_type' => 'pr_type',
'pr_level' => 'pr_level',
'pr_cascade' => 'pr_cascade',
'pr_user' => 'pr_user',
'pr_expiry' => 'pr_expiry'
],
[ 'pr_page' => $pageid ],
__METHOD__,
[ 'IGNORE' ]
);
// Build comment for log
$comment = wfMessage(
'prot_1movedto2',
$this->oldTitle->getPrefixedText(),
$this->newTitle->getPrefixedText()
)->inContentLanguage()->text();
if ( $reason ) {
$comment .= wfMessage( 'colon-separator' )->inContentLanguage()->text() . $reason;
}
// reread inserted pr_ids for log relation
$insertedPrIds = $dbw->select(
'page_restrictions',
'pr_id',
[ 'pr_page' => $redirid ],
__METHOD__
);
$logRelationsValues = [];
foreach ( $insertedPrIds as $prid ) {
$logRelationsValues[] = $prid->pr_id;
}
// Update the protection log
$logEntry = new ManualLogEntry( 'protect', 'move_prot' );
$logEntry->setTarget( $this->newTitle );
$logEntry->setComment( $comment );
$logEntry->setPerformer( $user );
$logEntry->setParameters( [
'4::oldtitle' => $this->oldTitle->getPrefixedText(),
] );
$logEntry->setRelations( [ 'pr_id' => $logRelationsValues ] );
$logId = $logEntry->insert();
$logEntry->publish( $logId );
}
// Update *_from_namespace fields as needed
if ( $this->oldTitle->getNamespace() != $this->newTitle->getNamespace() ) {
$dbw->update( 'pagelinks',
[ 'pl_from_namespace' => $this->newTitle->getNamespace() ],
[ 'pl_from' => $pageid ],
__METHOD__
);
$dbw->update( 'templatelinks',
[ 'tl_from_namespace' => $this->newTitle->getNamespace() ],
[ 'tl_from' => $pageid ],
__METHOD__
);
$dbw->update( 'imagelinks',
[ 'il_from_namespace' => $this->newTitle->getNamespace() ],
[ 'il_from' => $pageid ],
__METHOD__
);
}
# Update watchlists
$oldtitle = $this->oldTitle->getDBkey();
$newtitle = $this->newTitle->getDBkey();
$oldsnamespace = MWNamespace::getSubject( $this->oldTitle->getNamespace() );
$newsnamespace = MWNamespace::getSubject( $this->newTitle->getNamespace() );
if ( $oldsnamespace != $newsnamespace || $oldtitle != $newtitle ) {
$store = WatchedItemStore::getDefaultInstance();
$store->duplicateAllAssociatedEntries( $this->oldTitle, $this->newTitle );
}
Hooks::run(
'TitleMoveCompleting',
[ $this->oldTitle, $this->newTitle,
$user, $pageid, $redirid, $reason, $nullRevision ]
);
$dbw->endAtomic( __METHOD__ );
$params = [
&$this->oldTitle,
&$this->newTitle,
&$user,
$pageid,
$redirid,
$reason,
$nullRevision
];
$dbw->onTransactionIdle( function () use ( $params, $dbw ) {
// Keep each single hook handler atomic
$dbw->setFlag( DBO_TRX ); // flag is automatically reset by DB layer
Hooks::run( 'TitleMoveComplete', $params );
} );
return Status::newGood();
}
/**
* Move page to a title which is either a redirect to the
* source page or nonexistent
*
* @fixme This was basically directly moved from Title, it should be split into smaller functions
* @param User $user the User doing the move
* @param Title $nt The page to move to, which should be a redirect or nonexistent
* @param string $reason The reason for the move
* @param bool $createRedirect Whether to leave a redirect at the old title. Does not check
* if the user has the suppressredirect right
* @return Revision the revision created by the move
* @throws MWException
*/
private function moveToInternal( User $user, &$nt, $reason = '', $createRedirect = true ) {
global $wgContLang;
if ( $nt->exists() ) {
$moveOverRedirect = true;
$logType = 'move_redir';
} else {
$moveOverRedirect = false;
$logType = 'move';
}
if ( $createRedirect ) {
if ( $this->oldTitle->getNamespace() == NS_CATEGORY
&& !wfMessage( 'category-move-redirect-override' )->inContentLanguage()->isDisabled()
) {
$redirectContent = new WikitextContent(
wfMessage( 'category-move-redirect-override' )
->params( $nt->getPrefixedText() )->inContentLanguage()->plain() );
} else {
$contentHandler = ContentHandler::getForTitle( $this->oldTitle );
$redirectContent = $contentHandler->makeRedirectContent( $nt,
wfMessage( 'move-redirect-text' )->inContentLanguage()->plain() );
}
// NOTE: If this page's content model does not support redirects, $redirectContent will be null.
} else {
$redirectContent = null;
}
// Figure out whether the content model is no longer the default
$oldDefault = ContentHandler::getDefaultModelFor( $this->oldTitle );
$contentModel = $this->oldTitle->getContentModel();
$newDefault = ContentHandler::getDefaultModelFor( $nt );
$defaultContentModelChanging = ( $oldDefault !== $newDefault
&& $oldDefault === $contentModel );
// bug 57084: log_page should be the ID of the *moved* page
$oldid = $this->oldTitle->getArticleID();
$logTitle = clone $this->oldTitle;
$logEntry = new ManualLogEntry( 'move', $logType );
$logEntry->setPerformer( $user );
$logEntry->setTarget( $logTitle );
$logEntry->setComment( $reason );
$logEntry->setParameters( [
'4::target' => $nt->getPrefixedText(),
'5::noredir' => $redirectContent ? '0': '1',
] );
$formatter = LogFormatter::newFromEntry( $logEntry );
$formatter->setContext( RequestContext::newExtraneousContext( $this->oldTitle ) );
$comment = $formatter->getPlainActionText();
if ( $reason ) {
$comment .= wfMessage( 'colon-separator' )->inContentLanguage()->text() . $reason;
}
# Truncate for whole multibyte characters.
$comment = $wgContLang->truncate( $comment, 255 );
$dbw = wfGetDB( DB_MASTER );
$oldpage = WikiPage::factory( $this->oldTitle );
$oldcountable = $oldpage->isCountable();
$newpage = WikiPage::factory( $nt );
if ( $moveOverRedirect ) {
$newid = $nt->getArticleID();
$newcontent = $newpage->getContent();
# Delete the old redirect. We don't save it to history since
# by definition if we've got here it's rather uninteresting.
# We have to remove it so that the next step doesn't trigger
# a conflict on the unique namespace+title index...
$dbw->delete( 'page', [ 'page_id' => $newid ], __METHOD__ );
$newpage->doDeleteUpdates( $newid, $newcontent );
}
# Save a null revision in the page's history notifying of the move
$nullRevision = Revision::newNullRevision( $dbw, $oldid, $comment, true, $user );
if ( !is_object( $nullRevision ) ) {
throw new MWException( 'No valid null revision produced in ' . __METHOD__ );
}
$nullRevision->insertOn( $dbw );
# Change the name of the target page:
$dbw->update( 'page',
/* SET */ [
'page_namespace' => $nt->getNamespace(),
'page_title' => $nt->getDBkey(),
],
/* WHERE */ [ 'page_id' => $oldid ],
__METHOD__
);
// clean up the old title before reset article id - bug 45348
if ( !$redirectContent ) {
WikiPage::onArticleDelete( $this->oldTitle );
}
$this->oldTitle->resetArticleID( 0 ); // 0 == non existing
$nt->resetArticleID( $oldid );
$newpage->loadPageData( WikiPage::READ_LOCKING ); // bug 46397
$newpage->updateRevisionOn( $dbw, $nullRevision );
Hooks::run( 'NewRevisionFromEditComplete',
[ $newpage, $nullRevision, $nullRevision->getParentId(), $user ] );
$newpage->doEditUpdates( $nullRevision, $user,
[ 'changed' => false, 'moved' => true, 'oldcountable' => $oldcountable ] );
// If the default content model changes, we need to populate rev_content_model
if ( $defaultContentModelChanging ) {
$dbw->update(
'revision',
[ 'rev_content_model' => $contentModel ],
[ 'rev_page' => $nt->getArticleID(), 'rev_content_model IS NULL' ],
__METHOD__
);
}
if ( !$moveOverRedirect ) {
WikiPage::onArticleCreate( $nt );
}
# Recreate the redirect, this time in the other direction.
if ( $redirectContent ) {
$redirectArticle = WikiPage::factory( $this->oldTitle );
$redirectArticle->loadFromRow( false, WikiPage::READ_LOCKING ); // bug 46397
$newid = $redirectArticle->insertOn( $dbw );
if ( $newid ) { // sanity
$this->oldTitle->resetArticleID( $newid );
$redirectRevision = new Revision( [
'title' => $this->oldTitle, // for determining the default content model
'page' => $newid,
'user_text' => $user->getName(),
'user' => $user->getId(),
'comment' => $comment,
'content' => $redirectContent ] );
$redirectRevision->insertOn( $dbw );
$redirectArticle->updateRevisionOn( $dbw, $redirectRevision, 0 );
Hooks::run( 'NewRevisionFromEditComplete',
[ $redirectArticle, $redirectRevision, false, $user ] );
$redirectArticle->doEditUpdates( $redirectRevision, $user, [ 'created' => true ] );
}
}
# Log the move
$logid = $logEntry->insert();
$logEntry->publish( $logid );
return $nullRevision;
}
}