1 files changed, 102 insertions, 0 deletions
diff --git a/www/wiki/maintenance/deleteOrphanedRevisions.php b/www/wiki/maintenance/deleteOrphanedRevisions.php
new file mode 100644
index 00000000..8d3f6b3e
--- /dev/null
+++ b/www/wiki/maintenance/deleteOrphanedRevisions.php
@@ -0,0 +1,102 @@
+<?php
+/**
+ * Delete revisions which refer to a nonexisting page.
+ * Sometimes manual deletion done in a rush leaves crap in the database.
+ *
+ * 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
+ * @ingroup Maintenance
+ * @author Rob Church <robchur@gmail.com>
+ * @todo More efficient cleanup of text records
+ */
+
+require_once __DIR__ . '/Maintenance.php';
+
+use Wikimedia\Rdbms\IDatabase;
+
+/**
+ * Maintenance script that deletes revisions which refer to a nonexisting page.
+ *
+ * @ingroup Maintenance
+ */
+class DeleteOrphanedRevisions extends Maintenance {
+	public function __construct() {
+		parent::__construct();
+		$this->addDescription(
+			'Maintenance script to delete revisions which refer to a nonexisting page' );
+		$this->addOption( 'report', 'Prints out a count of affected revisions but doesn\'t delete them' );
+	}
+
+	public function execute() {
+		$this->output( "Delete Orphaned Revisions\n" );
+
+		$report = $this->hasOption( 'report' );
+
+		$dbw = $this->getDB( DB_MASTER );
+		$this->beginTransaction( $dbw, __METHOD__ );
+		list( $page, $revision ) = $dbw->tableNamesN( 'page', 'revision' );
+
+		# Find all the orphaned revisions
+		$this->output( "Checking for orphaned revisions..." );
+		$sql = "SELECT rev_id FROM {$revision} LEFT JOIN {$page} ON rev_page = page_id "
+			. "WHERE page_namespace IS NULL";
+		$res = $dbw->query( $sql, 'deleteOrphanedRevisions' );
+
+		# Stash 'em all up for deletion (if needed)
+		$revisions = [];
+		foreach ( $res as $row ) {
+			$revisions[] = $row->rev_id;
+		}
+		$count = count( $revisions );
+		$this->output( "found {$count}.\n" );
+
+		# Nothing to do?
+		if ( $report || $count == 0 ) {
+			$this->commitTransaction( $dbw, __METHOD__ );
+			exit( 0 );
+		}
+
+		# Delete each revision
+		$this->output( "Deleting..." );
+		$this->deleteRevs( $revisions, $dbw );
+		$this->output( "done.\n" );
+
+		# Close the transaction and call the script to purge unused text records
+		$this->commitTransaction( $dbw, __METHOD__ );
+		$this->purgeRedundantText( true );
+	}
+
+	/**
+	 * Delete one or more revisions from the database
+	 * Do this inside a transaction
+	 *
+	 * @param array $id Array of revision id values
+	 * @param IDatabase $dbw Master DB handle
+	 */
+	private function deleteRevs( $id, &$dbw ) {
+		if ( !is_array( $id ) ) {
+			$id = [ $id ];
+		}
+		$dbw->delete( 'revision', [ 'rev_id' => $id ], __METHOD__ );
+
+		// Delete from ip_changes should a record exist.
+		$dbw->delete( 'ip_changes', [ 'ipc_rev_id' => $id ], __METHOD__ );
+	}
+}
+
+$maintClass = DeleteOrphanedRevisions::class;
+require_once RUN_MAINTENANCE_IF_MAIN;