MediaWiki 1.30.2

[autoinstallsdev/mediawiki.git] / includes / title / NaiveForeignTitleFactory.php

diff --git a/includes/title/NaiveForeignTitleFactory.php b/includes/title/NaiveForeignTitleFactory.php
new file mode 100644 (file)
index 0000000..2c2f94b
--- /dev/null
+++ b/includes/title/NaiveForeignTitleFactory.php
@@ -0,0 +1,73 @@
+<?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
+ * @license GPL 2+
+ */
+
+/**
+ * A parser that translates page titles on a foreign wiki into ForeignTitle
+ * objects, with no knowledge of the namespace setup on the foreign site.
+ */
+class NaiveForeignTitleFactory implements ForeignTitleFactory {
+       /**
+        * Creates a ForeignTitle object based on the page title, and optionally the
+        * namespace ID, of a page on a foreign wiki. These values could be, for
+        * example, the <title> and <ns> attributes found in an XML dump.
+        *
+        * Although exported XML dumps have contained a map of namespace IDs to names
+        * since MW 1.5, the importer used to completely ignore the <siteinfo> tag
+        * before MW 1.25.  It is therefore possible that custom XML dumps (i.e. not
+        * generated by Special:Export) have been created without this metadata.
+        * As a result, this code falls back to using namespace data for the local
+        * wiki (similar to buggy pre-1.25 behaviour) if $ns is not supplied.
+        *
+        * @param string $title The page title
+        * @param int|null $ns The namespace ID, or null if this data is not available
+        * @return ForeignTitle
+        */
+       public function createForeignTitle( $title, $ns = null ) {
+               $pieces = explode( ':', $title, 2 );
+
+               global $wgContLang;
+
+               /**
+                * Can we assume that the part of the page title before the colon is a
+                * namespace name?
+                *
+                * XML export schema version 0.5 and earlier (MW 1.18 and earlier) does not
+                * contain a <ns> tag, so we need to be able to handle that case.
+                *
+                * If we know the namespace ID, we assume a non-zero namespace ID means
+                * the ':' sets off a valid namespace name. If we don't know the namespace
+                * ID, we fall back to using the local wiki's namespace names to resolve
+                * this -- better than nothing, and mimics the old crappy behavior
+                */
+               $isNamespacePartValid = is_null( $ns ) ?
+                       ( $wgContLang->getNsIndex( $pieces[0] ) !== false ) :
+                       $ns != 0;
+
+               if ( count( $pieces ) === 2 && $isNamespacePartValid ) {
+                       list( $namespaceName, $pageName ) = $pieces;
+               } else {
+                       $namespaceName = '';
+                       $pageName = $title;
+               }
+
+               return new ForeignTitle( $ns, $namespaceName, $pageName );
+       }
+}