BundleAdvancedPricing.php

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<?php
namespace Magento\Bundle\Ui\DataProvider\Product\Form\Modifier;

use Magento\Catalog\Api\Data\ProductAttributeInterface;
use Magento\Catalog\Ui\DataProvider\Product\Form\Modifier\AbstractModifier;
use Magento\Framework\Stdlib\ArrayManager;

class BundleAdvancedPricing extends AbstractModifier
{
    const CODE_PRICE_TYPE = 'price_type';
    const CODE_MSRP = 'msrp';
    const CODE_MSRP_DISPLAY_ACTUAL_PRICE_TYPE = 'msrp_display_actual_price_type';
    const CODE_ADVANCED_PRICING = 'advanced-pricing';
    const CODE_RECORD = 'record';

    private $arrayManager;

    public function __construct(ArrayManager $arrayManager)
    {
        $this->arrayManager = $arrayManager;
    }

    public function modifyMeta(array $meta)
    {
        $groupCode = $this->getGroupCodeByField($meta, self::CODE_ADVANCED_PRICING);
        if ($groupCode) {
            $parentNode = &$meta[$groupCode]['children'][self::CODE_ADVANCED_PRICING]['children'];
            if (isset($parentNode['container_' . self::CODE_MSRP])
                && isset($parentNode['container_' . self::CODE_MSRP_DISPLAY_ACTUAL_PRICE_TYPE])
            ) {
                $parentNode = $this->modifyMsrpMeta($parentNode);
            }
            if (isset($parentNode['container_' . ProductAttributeInterface::CODE_SPECIAL_PRICE])) {
                $currentNode = &$parentNode['container_' . ProductAttributeInterface::CODE_SPECIAL_PRICE]['children'];
                $currentNode[ProductAttributeInterface::CODE_SPECIAL_PRICE]['arguments']['data']['config']['addbefore']
                    = "%";
            }
            $parentNodeChildren = &$parentNode[ProductAttributeInterface::CODE_TIER_PRICE]['children'];
            if (isset($parentNodeChildren[self::CODE_RECORD]['children'][ProductAttributeInterface::CODE_PRICE])) {
                $currentNode =
                &$parentNodeChildren[self::CODE_RECORD]['children'][ProductAttributeInterface::CODE_PRICE];
                $currentNode['arguments']['data']['config']['label'] = __('Percent Discount');
            }
        }

        return $meta;
    }

    public function modifyData(array $data)
    {
        return $data;
    }

    private function modifyMsrpMeta(array $meta)
    {
        $meta = $this->arrayManager->merge(
            $this->arrayManager->findPath(
                static::CODE_MSRP,
                $meta,
                null,
                'children'
            ) . static::META_CONFIG_PATH,
            $meta,
            [
                'imports' => [
                    'disabled' => 'ns = ${ $.ns }, index = ' . static::CODE_PRICE_TYPE . ':checked'
                ]
            ]
        );

        $meta = $this->arrayManager->merge(
            $this->arrayManager->findPath(
                static::CODE_MSRP_DISPLAY_ACTUAL_PRICE_TYPE,
                $meta,
                null,
                'children'
            ) . static::META_CONFIG_PATH,
            $meta,
            [
                'imports' => [
                    'disabled' => 'ns = ${ $.ns }, index = ' . static::CODE_PRICE_TYPE . ':checked'
                ]
            ]
        );

        return $meta;
    }
}