public function transform($value, MigrateExecutableInterface $migrate_executable, Row $row, $destination_property) {
$type = $row
->getSourceProperty('type');
if ($type == 'paragraphs') {
$bundles = $this->entityTypeBundleInfo
->getBundleInfo('paragraph');
$target_bundles = [];
if (!empty($value['allowed_bundles'])) {
$target_bundles = array_filter($value['allowed_bundles'], function ($a) {
return $a != -1;
});
$value['handler_settings']['negate'] = 0;
if (empty($target_bundles)) {
$value['handler_settings']['target_bundles'] = NULL;
}
else {
$value['handler_settings']['target_bundles'] = $target_bundles;
}
unset($value['allowed_bundles']);
}
if (!empty($value['bundle_weights'])) {
// Copy the existing weights, and add any new bundles (either from
// a field collection migration happening now, or pre-existing on the
// site at the bottom.
foreach ($value['bundle_weights'] as $bundle_name => $weight) {
$value['handler_settings']['target_bundles_drag_drop'][$bundle_name] = [
'enabled' => array_key_exists($bundle_name, $target_bundles),
'weight' => $weight,
];
}
$other_bundles = array_keys(array_diff_key($bundles, $value['bundle_weights']));
$weight = max($value['bundle_weights']);
foreach ($other_bundles as $bundle_name) {
$value['handler_settings']['target_bundles_drag_drop'][$bundle_name] = [
'enabled' => array_key_exists($bundle_name, $target_bundles),
'weight' => ++$weight,
];
}
unset($value['bundle_weights']);
}
}
return $value;
}