AbstractModifier.php

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

use Magento\Framework\Pricing\PriceCurrencyInterface;
use Magento\Ui\DataProvider\Modifier\ModifierInterface;

abstract class AbstractModifier implements ModifierInterface
{
    const FORM_NAME = 'product_form';
    const DATA_SOURCE_DEFAULT = 'product';
    const DATA_SCOPE_PRODUCT = 'data.product';

    const DEFAULT_GENERAL_PANEL = 'product-details';

    const GENERAL_PANEL_ORDER = 10;

    const CONTAINER_PREFIX = 'container_';

    const META_CONFIG_PATH = '/arguments/data/config';

    protected function getNextGroupSortOrder(array $meta, $groupCodes, $defaultSortOrder, $iteration = 1)
    {
        $groupCodes = (array)$groupCodes;

        foreach ($groupCodes as $groupCode) {
            if (isset($meta[$groupCode]['arguments']['data']['config']['sortOrder'])) {
                return $meta[$groupCode]['arguments']['data']['config']['sortOrder'] + $iteration;
            }
        }

        return $defaultSortOrder;
    }

    protected function getNextAttributeSortOrder(array $meta, $attributeCodes, $defaultSortOrder, $iteration = 1)
    {
        $attributeCodes = (array)$attributeCodes;

        foreach ($meta as $groupMeta) {
            $defaultSortOrder = $this->_getNextAttributeSortOrder(
                $groupMeta,
                $attributeCodes,
                $defaultSortOrder,
                $iteration
            );
        }

        return $defaultSortOrder;
    }

    private function _getNextAttributeSortOrder(array $meta, $attributeCodes, $defaultSortOrder, $iteration = 1)
    {
        if (isset($meta['children'])) {
            foreach ($meta['children'] as $attributeCode => $attributeMeta) {
                if ($this->startsWith($attributeCode, self::CONTAINER_PREFIX)) {
                    $defaultSortOrder = $this->_getNextAttributeSortOrder(
                        $attributeMeta,
                        $attributeCodes,
                        $defaultSortOrder,
                        $iteration
                    );
                } elseif (in_array($attributeCode, $attributeCodes)
                    && isset($attributeMeta['arguments']['data']['config']['sortOrder'])
                ) {
                    $defaultSortOrder = $attributeMeta['arguments']['data']['config']['sortOrder'] + $iteration;
                }
            }
        }

        return $defaultSortOrder;
    }

    protected function startsWith($haystack, $needle)
    {
        return $needle === '' || strrpos($haystack, $needle, -strlen($haystack)) !== false;
    }

    protected function getGeneralPanelName(array $meta)
    {
        if (!$meta) {
            return null;
        }

        if (isset($meta[self::DEFAULT_GENERAL_PANEL])) {
            return self::DEFAULT_GENERAL_PANEL;
        }

        return $this->getFirstPanelCode($meta);
    }

    protected function getFirstPanelCode(array $meta)
    {
        $min = null;
        $name = null;

        foreach ($meta as $fieldSetName => $fieldSetMeta) {
            if (isset($fieldSetMeta['arguments']['data']['config']['sortOrder'])
                && (null === $min || $fieldSetMeta['arguments']['data']['config']['sortOrder'] <= $min)
            ) {
                $min = $fieldSetMeta['arguments']['data']['config']['sortOrder'];
                $name = $fieldSetName;
            }
        }

        return $name;
    }

    protected function getGroupCodeByField(array $meta, $field)
    {
        foreach ($meta as $groupCode => $groupData) {
            if (isset($groupData['children'][$field])
                || isset($groupData['children'][static::CONTAINER_PREFIX . $field])
            ) {
                return $groupCode;
            }
        }

        return false;
    }

    protected function formatPrice($value)
    {
        return $value !== null ? number_format((float)$value, PriceCurrencyInterface::DEFAULT_PRECISION, '.', '') : '';
    }

    protected function formatWeight($value)
    {
        return (float)$value;
    }
}