1 files changed, 93 insertions, 0 deletions
diff --git a/www/wiki/extensions/SemanticMediaWiki/src/MediaWiki/Deferred/ChangeTitleUpdate.php b/www/wiki/extensions/SemanticMediaWiki/src/MediaWiki/Deferred/ChangeTitleUpdate.php
new file mode 100644
index 00000000..73603655
--- /dev/null
+++ b/www/wiki/extensions/SemanticMediaWiki/src/MediaWiki/Deferred/ChangeTitleUpdate.php
@@ -0,0 +1,93 @@
+<?php
+
+namespace SMW\MediaWiki\Deferred;
+
+use DeferrableUpdate;
+use DeferredUpdates;
+use Title;
+use SMW\ApplicationFactory;
+use SMW\MediaWiki\Jobs\UpdateJob;
+use SMW\Site;
+use SMW\Enum;
+
+/**
+ * Run a deferred update job for a changed title instance to re-parse the content
+ * of those associated titles and make sure that its content (incl. any
+ * self-reference) is correctly represented.
+ *
+ * @license GNU GPL v2+
+ * @since 3.0
+ *
+ * @author mwjames
+ */
+class ChangeTitleUpdate implements DeferrableUpdate {
+
+	/**
+	 * @var Title|null
+	 */
+	private $oldTitle;
+
+	/**
+	 * @var Title|null
+	 */
+	private $newTitle;
+
+	/**
+	 * @since 3.0
+	 *
+	 * @param Title|null $oldTitle
+	 * @param Title|null $newTitle
+	 */
+	public function __construct( Title $oldTitle = null, Title $newTitle = null ) {
+		$this->oldTitle = $oldTitle;
+		$this->newTitle = $newTitle;
+	}
+
+	/**
+	 * @since 3.0
+	 *
+	 * @param Title|null $oldTitle
+	 * @param Title|null $newTitle
+	 */
+	public static function addUpdate( Title $oldTitle = null, Title $newTitle = null ) {
+
+		// Avoid deferring the update on CLI (and the DeferredUpdates::tryOpportunisticExecute)
+		// since we use a Job instance to carry out the change
+		if ( Site::isCommandLineMode() ) {
+			$changeTitleUpdate = new self( $oldTitle, $newTitle );
+			$changeTitleUpdate->doUpdate();
+		} else {
+			DeferredUpdates::addUpdate( new self( $oldTitle, $newTitle ) );
+		}
+	}
+
+	/**
+	 * @see DeferrableUpdate::doUpdate
+	 *
+	 * @since 3.0
+	 */
+	public function doUpdate() {
+
+		$applicationFactory = ApplicationFactory::getInstance();
+		$jobFactory = $applicationFactory->newJobFactory();
+
+		$parameters = [
+			UpdateJob::FORCED_UPDATE => true,
+
+			// Run purge job after the change has happened since no post-edit event
+			// will be triggered on a changed/redirect title
+			Enum::PURGE_ASSOC_PARSERCACHE => true,
+
+			'origin' => 'ChangeTitleUpdate'
+		];
+
+		if ( $this->oldTitle !== null ) {
+			$jobFactory->newUpdateJob( $this->oldTitle, $parameters )->run();
+		}
+
+		if ( $this->newTitle !== null ) {
+			$jobFactory->newUpdateJob( $this->newTitle, $parameters )->run();
+		}
+	}
+
+}