field.php

<?php
namespace Bitrix\Lists\Copy\Implement\Children;
 
use Bitrix\Iblock\Copy\Implement\Children\Field as BaseField;
use Bitrix\Main\Error;
use Bitrix\Main\Localization\Loc;
use Bitrix\Main\Result;
 
Loc::loadMessages(__FILE__);
 
class Field extends BaseField
{
    public function copy($iblockId, $copiedIblockId): Result
    {
        $fields = $this->getFieldsToCopy($iblockId, $copiedIblockId);
        $this->addListsFields($iblockId, $copiedIblockId, $fields);
 
        return $this->result;
    }
 
    private function getFieldsToCopy($iblockId, $copiedIblockId)
    {
        $fields = [];
 
        $object = new \CList($iblockId);
 
        foreach($object->getFields() as $fieldId => $field)
        {
            $copiedField = [
                "ID" => $fieldId,
                "NAME" => $field["NAME"],
                "SORT" => $field["SORT"],
                "MULTIPLE" => $field["MULTIPLE"],
                "IS_REQUIRED" => $field["IS_REQUIRED"],
                "IBLOCK_ID" => $copiedIblockId,
                "SETTINGS" => $field["SETTINGS"],
                "DEFAULT_VALUE" => $field["DEFAULT_VALUE"],
                "TYPE" => $field["TYPE"],
                "PROPERTY_TYPE" => $field["PROPERTY_TYPE"],
            ];
 
            if (!$object->is_field($fieldId))
            {
                if ($field["TYPE"] == "L")
                {
                    $copiedField["VALUES"] = $this->getEnumValues($fieldId);
                }
 
                $copiedField["CODE"] = $field["CODE"];
                $copiedField["LINK_IBLOCK_ID"] = $field["LINK_IBLOCK_ID"];
                if (!empty($field["PROPERTY_USER_TYPE"]["USER_TYPE"]))
                    $copiedField["USER_TYPE"] = $field["PROPERTY_USER_TYPE"]["USER_TYPE"];
                if (!empty($field["ROW_COUNT"]))
                    $copiedField["ROW_COUNT"] = $field["ROW_COUNT"];
                if (!empty($field["COL_COUNT"]))
                    $copiedField["COL_COUNT"] = $field["COL_COUNT"];
                if (!empty($field["USER_TYPE_SETTINGS"]))
                    $copiedField["USER_TYPE_SETTINGS"] = $field["USER_TYPE_SETTINGS"];
            }
            $fields[] = $copiedField;
        }
 
        return $fields;
    }
 
    private function addListsFields($iblockId, $copiedIblockId, array $fields)
    {
        $object = new \CList($copiedIblockId);
 
        foreach ($fields as $field)
        {
            if ($field["ID"] == "NAME")
            {
                $result = $object->updateField("NAME", $field);
            }
            else
            {
                $result = $object->addField($field);
            }
 
            if ($result)
            {
                $object->save();
 
                $this->setEnumRatio($iblockId, $field["ID"], $result);
            }
            else
            {
                $this->result->addError(
                    new Error(
                        Loc::getMessage("COPY_FIELD_ERROR", ["#NAME#" => $field["NAME"]]),
                        self::FIELD_COPY_ERROR
                    )
                );
            }
        }
    }
}