self::selectUserFields()
);
$options = array( 'LIMIT' => 1 );
- if ( $flags & self::READ_LOCKING ) {
+ if ( ( $flags & self::READ_LOCKING ) == self::READ_LOCKING ) {
$options[] = 'FOR UPDATE';
}
return $db->select(
* @return Integer
*/
static function countByPageId( $db, $id ) {
- $row = $db->selectRow( 'revision', 'COUNT(*) AS revCount',
+ $row = $db->selectRow( 'revision', array( 'revCount' => 'COUNT(*)' ),
array( 'rev_page' => $id ), __METHOD__ );
if( $row ) {
return $row->revCount;
}
return 0;
}
-}
+
+ /**
+ * Check if no edits were made by other users since
+ * the time a user started editing the page. Limit to
+ * 50 revisions for the sake of performance.
+ *
+ * @since 1.20
+ *
+ * @param DatabaseBase|int $db the Database to perform the check on. May be given as a Database object or
+ * a database identifier usable with wfGetDB.
+ * @param int $pageId the ID of the page in question
+ * @param int $userId the ID of the user in question
+ * @param string $since look at edits since this time
+ *
+ * @return bool True if the given user was the only one to edit since the given timestamp
+ */
+ public static function userWasLastToEdit( $db, $pageId, $userId, $since ) {
+ if ( !$userId ) return false;
+
+ if ( is_int( $db ) ) {
+ $db = wfGetDB( $db );
+ }
+
+ $res = $db->select( 'revision',
+ 'rev_user',
+ array(
+ 'rev_page' => $pageId,
+ 'rev_timestamp > ' . $db->addQuotes( $db->timestamp( $since ) )
+ ),
+ __METHOD__,
+ array( 'ORDER BY' => 'rev_timestamp ASC', 'LIMIT' => 50 ) );
+ foreach ( $res as $row ) {
+ if ( $row->rev_user != $userId ) {
+ return false;
+ }
+ }
+ return true;
+ }
+}
\ No newline at end of file