1 files changed, 60 insertions, 0 deletions
diff --git a/www/wiki/extensions/SemanticMediaWiki/src/MediaWiki/Hooks/TitleIsMovable.php b/www/wiki/extensions/SemanticMediaWiki/src/MediaWiki/Hooks/TitleIsMovable.php
new file mode 100644
index 00000000..3a3670d8
--- /dev/null
+++ b/www/wiki/extensions/SemanticMediaWiki/src/MediaWiki/Hooks/TitleIsMovable.php
@@ -0,0 +1,60 @@
+<?php
+
+namespace SMW\MediaWiki\Hooks;
+
+use SMW\DIProperty;
+use Title;
+
+/**
+ * @see https://www.mediawiki.org/wiki/Manual:Hooks/TitleIsMovable
+ *
+ * @license GNU GPL v2+
+ * @since 2.1
+ *
+ * @author mwjames
+ */
+class TitleIsMovable extends HookHandler {
+
+	/**
+	 * @var Title
+	 */
+	private $title;
+
+	/**
+	 * @since  2.1
+	 *
+	 * @param Title $title
+	 */
+	public function __construct( Title $title ) {
+		$this->title = $title;
+	}
+
+	/**
+	 * @since 2.1
+	 *
+	 * @param boolean &$isMovable
+	 *
+	 * @return boolean
+	 */
+	public function process( &$isMovable ) {
+
+		// We don't allow rule pages to be moved as we cannot track JSON content
+		// as redirects and therefore invalidate any rule assignment without a
+		// possibility to automatically reassign IDs
+		if ( $this->title->getNamespace() === SMW_NS_SCHEMA ) {
+			$isMovable = false;
+		}
+
+		if ( $this->title->getNamespace() !== SMW_NS_PROPERTY ) {
+			return true;
+		}
+
+		// Predefined properties cannot be moved!
+		if ( !DIProperty::newFromUserLabel( $this->title->getText() )->isUserDefined() ) {
+			$isMovable = false;
+		}
+
+		return true;
+	}
+
+}