(bug 18019) Warn users when moving a file to a name in use on a shared repo.

Allow only users with the 'reupload-shared' right to complete the move.

RELEASE-NOTES

@@ -591,6 +591,9 @@ it from source control: http://www.mediawiki.org/wiki/Download_from_SVN
 * (bug 21006) maintenance/updateArticleCount.php now works again on PostgreSQL
 * (bug 19319) Add activeusers-intro message at top of SpecialActiveUsers page
 * (bug 21255) Fixed hostname construction for DNSBL checking
+* (bug 18019) Users are now warned when moving a file to a name in use on a
+  shared repository and only users with the 'reupload-shared' permission can
+  complete the move.
 
 == API changes in 1.16 ==
 

includes/api/ApiBase.php

@@ -846,6 +846,8 @@ abstract class ApiBase {
 		'import-noarticle' => array('code' => 'badinterwiki', 'info' => 'Invalid interwiki title specified'),
 		'importbadinterwiki' => array('code' => 'badinterwiki', 'info' => 'Invalid interwiki title specified'),
 		'import-unknownerror' => array('code' => 'import-unknownerror', 'info' => "Unknown error on import: ``\$1''"),
+		'cantoverwrite-sharedfile' => array('code' => 'cantoverwrite-sharedfile', 'info' => 'The target file exists on a shared repository and you do not have permission to override it'),
+		'sharedfile-exists' => array('code' => 'fileexists-sharedrepo-perm', 'info' => 'The target file exists on a shared repository. Use the ignorewarnings parameter to override it.'),
 
 		// ApiEditPage messages
 		'noimageredirect-anon' => array('code' => 'noimageredirect-anon', 'info' => "Anonymous users can't create image redirects"),

includes/api/ApiMove.php

@@ -71,7 +71,18 @@ class ApiMove extends ApiBase {
 		if(!$toTitle)
 			$this->dieUsageMsg(array('invalidtitle', $params['to']));
 		$toTalk = $toTitle->getTalkPage();
-
+		
+		if ( $toTitle->getNamespace() == NS_FILE 
+			&& !RepoGroup::singleton()->getLocalRepo()->findFile( $toTitle ) 
+			&& wfFindFile( $toTitle ) )
+		{
+			if ( !$params['ignorewarnings'] && $wgUser->isAllowed( 'reupload-shared' ) ) {
+				$this->dieUsageMsg(array('sharedfile-exists'));
+			} elseif ( !$wgUser->isAllowed( 'reupload-shared' ) ) {
+				$this->dieUsageMsg(array('cantoverwrite-sharedfile'));
+			}
+		}
+		
 		# Move the page
 		$hookErr = null;
 		$retval = $fromTitle->moveTo($toTitle, true, $params['reason'], !$params['noredirect']);
@@ -171,7 +182,8 @@ class ApiMove extends ApiBase {
 			'movesubpages' => false,
 			'noredirect' => false,
 			'watch' => false,
-			'unwatch' => false
+			'unwatch' => false,
+			'ignorewarnings' => false
 		);
 	}
 
@@ -186,7 +198,8 @@ class ApiMove extends ApiBase {
 			'movesubpages' => 'Move subpages, if applicable',
 			'noredirect' => 'Don\'t create a redirect',
 			'watch' => 'Add the page and the redirect to your watchlist',
-			'unwatch' => 'Remove the page and the redirect from your watchlist'
+			'unwatch' => 'Remove the page and the redirect from your watchlist',
+			'ignorewarnings' => 'Ignore any warnings'
 		);
 	}
 

includes/specials/SpecialMovepage.php

@@ -58,7 +58,7 @@ function wfSpecialMovepage( $par = null ) {
 class MovePageForm {
 	var $oldTitle, $newTitle; # Objects
 	var $reason; # Text input
-	var $moveTalk, $deleteAndMove, $moveSubpages, $fixRedirects, $leaveRedirect; # Checks
+	var $moveTalk, $deleteAndMove, $moveSubpages, $fixRedirects, $leaveRedirect, $moveOverShared; # Checks
 
 	private $watch = false;
 
@@ -79,6 +79,7 @@ class MovePageForm {
 		}
 		$this->moveSubpages = $wgRequest->getBool( 'wpMovesubpages', false );
 		$this->deleteAndMove = $wgRequest->getBool( 'wpDeleteAndMove' ) && $wgRequest->getBool( 'wpConfirm' );
+		$this->moveOverShared = $wgRequest->getBool( 'wpMoveOverSharedFile', false );
 		$this->watch = $wgRequest->getCheck( 'wpWatch' );
 	}
 
@@ -136,6 +137,12 @@ class MovePageForm {
 			$confirm = false;
 		}
 
+		if ( !empty($err) && $err[0] == 'file-exists-sharedrepo' && $wgUser->isAllowed( 'reupload-shared' ) ) {
+			$wgOut->addWikiMsg( 'move-over-sharedrepo', $newTitle->getPrefixedText() );
+			$submitVar = 'wpMoveOverSharedFile';
+			$err = '';
+		}
+		
 		$oldTalk = $this->oldTitle->getTalkPage();
 		$considerTalk = ( !$this->oldTitle->isTalkPage() && $oldTalk->exists() );
 
@@ -351,6 +358,17 @@ class MovePageForm {
 			return;
 		}
 
+		# Show a warning if the target file exists on a shared repo
+		if ( $nt->getNamespace() == NS_FILE 
+			&& !( $this->moveOverShared && $wgUser->isAllowed( 'reupload-shared' ) )
+			&& !RepoGroup::singleton()->getLocalRepo()->findFile( $nt ) 
+			&& wfFindFile( $nt ) )
+		{
+			$this->showForm( array('file-exists-sharedrepo') );
+			return;
+			
+		}
+		
 		if ( $wgUser->isAllowed( 'suppressredirect' ) ) {
 			$createRedirect = $this->leaveRedirect;
 		} else {

languages/messages/MessagesEn.php

@@ -3109,6 +3109,10 @@ cannot move a page over itself.',
 'move-leave-redirect'          => 'Leave a redirect behind',
 'protectedpagemovewarning'     => "'''Warning:''' This page has been locked so that only users with administrator privileges can move it.",
 'semiprotectedpagemovewarning' => "'''Note:''' This page has been locked so that only registered users can move it.",
+'move-over-sharedrepo'         => '==File exists==
+[[:$1]] exists on a shared repository. Moving a file to this title will override the shared file.',
+'file-exists-sharedrepo'       => 'The file name chosen is already in use on a shared repository.
+Please choose another name.',
 
 # Export
 'export'            => 'Export pages',