history_restore_record.php

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<?php
class dataface_actions_history_restore_record {

        function handle(&$params){
        
                if ( !@$_POST['history__id'] ) return PEAR::raiseError("No history id specified", DATAFACE_E_ERROR);
                $historyid = $_POST['history__id'];
                if ( !preg_match('/\d+/', $historyid) ) return PEAR::raiseError("Invalid history id provided.", DATAFACE_E_ERROR);
                
                $app =& Dataface_Application::getInstance();
                $record =& $app->getRecord();
                if ( !$record ) return PEAR::raiseError("No record was specified", DATAFACE_E_ERROR);
                
                import("Dataface/HistoryTool.php");
                $ht = new Dataface_HistoryTool();
                $hrecord = $ht->getRecordById($record->_table->tablename, $historyid);
                
                // make sure that this history record matches the current record.
                $keys = array_keys($record->_table->keys());
                if ( $record->strvals($keys) != $hrecord->strvals($keys) ) 
                        return PEAR::raiseError("Attempt to restore record history from unmatching history record.", DATAFACE_E_ERROR);
                        
                
                // Now that we are convinced that we have the correct record, we can restore it.
                if ( @$_POST['-fieldname'] ) $fieldname = $_POST['-fieldname'];
                else $fieldname = null;
                $res = $ht->restore($record, $historyid, $fieldname, true);
                
                if ( PEAR::isError($res) ) return $res;
                
                $url = false; //$app->getPreviousUrl(true);
                if ( @$_POST['-locationid'] ) $url = DATAFACE_SITE_HREF.'?'.$app->decodeLocation($_POST['-locationid']);

                if ( !$url ){
                        // If the url is not specified we will just create a url to return
                        // to the specified record's history listing.
                        $url = $record->getURL('-action=history');
                
                }
                
                if ( $fieldname ){
                        $msg = "Field '$fieldname' successfully restored to its value from '".$hrecord->strval('history__modified')."'.";
                } else {
                        $msg = "Record successfully restored to its value from '".$hrecord->strval('history__modified')."'.";
                }
                $url .= "&--msg=".urlencode($msg);
                
                $app->redirect($url);
                
        }

}

?>