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<?php
/**
 * Copyright © Magento, Inc. All rights reserved.
 * See COPYING.txt for license details.
 */
namespace Magento\Customer\Model;

use Magento\Customer\Api\AddressMetadataInterface;
use Magento\Customer\Api\CustomerMetadataInterface;
use Magento\Customer\Api\Data\AttributeMetadataInterface;
use Magento\Customer\Model\FileProcessorFactory;
use Magento\Customer\Model\Metadata\ElementFactory;
use Magento\Framework\Exception\LocalizedException;

class FileUploader
{
    /**
     * @var CustomerMetadataInterface
     */
    private $customerMetadataService;

    /**
     * @var AddressMetadataInterface
     */
    private $addressMetadataService;

    /**
     * @var ElementFactory
     */
    private $elementFactory;

    /**
     * @var FileProcessorFactory
     */
    private $fileProcessorFactory;

    /**
     * @var AttributeMetadataInterface
     */
    private $attributeMetadata;

    /**
     * @var string
     */
    private $entityTypeCode;

    /**
     * @var string
     */
    private $scope;

    /**
     * @param CustomerMetadataInterface $customerMetadataService
     * @param AddressMetadataInterface $addressMetadataService
     * @param ElementFactory $elementFactory
     * @param FileProcessorFactory $fileProcessorFactory
     * @param AttributeMetadataInterface $attributeMetadata
     * @param string $entityTypeCode
     * @param string $scope
     */
    public function __construct(
        CustomerMetadataInterface $customerMetadataService,
        AddressMetadataInterface $addressMetadataService,
        ElementFactory $elementFactory,
        FileProcessorFactory $fileProcessorFactory,
        AttributeMetadataInterface $attributeMetadata,
        $entityTypeCode,
        $scope
    ) {
        $this->customerMetadataService = $customerMetadataService;
        $this->addressMetadataService = $addressMetadataService;
        $this->elementFactory = $elementFactory;
        $this->fileProcessorFactory = $fileProcessorFactory;
        $this->attributeMetadata = $attributeMetadata;
        $this->entityTypeCode = $entityTypeCode;
        $this->scope = $scope;
    }

    /**
     * Validate uploaded file
     *
     * @return array|bool
     */
    public function validate()
    {
        $formElement = $this->elementFactory->create(
            $this->attributeMetadata,
            null,
            $this->entityTypeCode
        );

        $errors = $formElement->validateValue($this->getData());
        return $errors;
    }

    /**
     * Execute file uploading
     *
     * @return \string[]
     * @throws LocalizedException
     */
    public function upload()
    {
        return $this->uploadFile();
    }

    /**
     * File uploading process
     *
     * @param bool $useScope
     * @return string[]
     * @throws LocalizedException
     */
    public function uploadFile($useScope = true)
    {
        /** @var FileProcessor $fileProcessor */
        $fileProcessor = $this->fileProcessorFactory->create(
            [
                'entityTypeCode' => $this->entityTypeCode,
                'allowedExtensions' => $this->getAllowedExtensions(),
            ]
        );

        if ($useScope === true) {
            $fileId = $this->scope . '[' . $this->getAttributeCode() . ']';
        } else {
            $fileId = $this->getAttributeCode();
        }
        $result = $fileProcessor->saveTemporaryFile($fileId);

        // Update tmp_name param. Required for attribute validation!
        $result['tmp_name'] = ltrim($result['file'] ?? '', '/');

        $result['url'] = $fileProcessor->getViewUrl(
            FileProcessor::TMP_DIR . '/' . ltrim($result['name'] ?? '', '/'),
            $this->attributeMetadata->getFrontendInput()
        );

        return $result;
    }

    /**
     * Get attribute code
     *
     * @return string
     */
    private function getAttributeCode()
    {
        // phpcs:disable Magento2.Security.Superglobal
        if (is_array($_FILES[$this->scope]['name'])) {
            $code = key($_FILES[$this->scope]['name']);
        } else {
            $code = $this->scope;
        }
        // phpcs:enable Magento2.Security.Superglobal
        return $code;
    }

    /**
     * Retrieve data from global $_FILES array
     *
     * @return array
     */
    private function getData()
    {
        $data = [];

        // phpcs:disable Magento2.Security.Superglobal
        $fileAttributes = $_FILES[$this->scope];
        foreach ($fileAttributes as $attributeName => $attributeValue) {
            if (is_array($attributeValue)) {
                $data[$attributeName] = $attributeValue[$this->getAttributeCode()];
            } else {
                $data[$attributeName] = $attributeValue;
            }
        }
        // phpcs:enable Magento2.Security.Superglobal

        return $data;
    }

    /**
     * Get allowed extensions
     *
     * @return array
     */
    private function getAllowedExtensions()
    {
        $allowedExtensions = [];

        $validationRules = $this->attributeMetadata->getValidationRules();
        foreach ($validationRules as $validationRule) {
            if ($validationRule->getName() == 'file_extensions') {
                $allowedExtensions = explode(',', $validationRule->getValue() ?? '');
                array_walk(
                    $allowedExtensions,
                    function (&$value) {
                        $value = strtolower(trim($value));
                    }
                );
                break;
            }
        }

        return $allowedExtensions;
    }
}