--- /dev/null
+<?php
+
+namespace Drupal\redirect\Plugin\migrate\process;
+
+use Drupal\migrate\MigrateExecutableInterface;
+use Drupal\migrate\ProcessPluginBase;
+use Drupal\migrate\Row;
+
+/**
+ * @MigrateProcessPlugin(
+ * id = "d6_path_redirect"
+ * )
+ */
+class PathRedirect extends ProcessPluginBase {
+
+ /**
+ * {@inheritdoc}
+ *
+ * Transform the field as required for an iFrame field.
+ */
+ public function transform($value, MigrateExecutableInterface $migrate_executable, Row $row, $destination_property) {
+
+ // Check if the url begins with http.
+ if (preg_match('#^http#', $value[0])) {
+ // Use it as is.
+ $uri = $value[0];
+ }
+ else {
+ // Make the link internal.
+ $uri = 'internal:/' . $value[0];
+ }
+
+ // Check if there is a query.
+ if (!empty($value[1])) {
+ // Add it to the end of the url.
+ $uri .= '?' . $value[1];
+ }
+
+ return $uri;
+ }
+
+}