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Upload File : current_dir [ Writeable ] document_root [ Writeable ]

<?php
/**
 * Copyright © Extmag. All rights reserved.
 */

namespace Extmag\Shiplab\Model\Config\Backend;

use Exception;
use Extmag\Shiplab\Model\Config\Value;
use Magento\Config\Model\Config\Backend\File\RequestData\RequestDataInterface;
use Magento\Framework\App\Cache\TypeListInterface;
use Magento\Framework\App\Config\ScopeConfigInterface;
use Magento\Framework\App\Filesystem\DirectoryList;
use Magento\Framework\Data\Collection\AbstractDb;
use Magento\Framework\Exception\FileSystemException;
use Magento\Framework\Exception\LocalizedException;
use Magento\Framework\Filesystem;
use Magento\Framework\Filesystem\Directory\WriteInterface;
use Magento\Framework\Model\Context;
use Magento\Framework\Model\ResourceModel\AbstractResource;
use Magento\Framework\Registry;
use Magento\MediaStorage\Model\File\Uploader;
use Magento\MediaStorage\Model\File\UploaderFactory;

/**
 * System config file field backend model
 *
 * @SuppressWarnings(PHPMD.CouplingBetweenObjects)
 * @SuppressWarnings(PHPMD.ExcessiveParameterList)
 * @api
 * @since 100.0.2
 */
class File extends Value
{
    /**
     * @var RequestDataInterface
     */
    protected $_requestData;

    /**
     * Upload max file size in kilobytes
     *
     * @var int
     */
    protected $_maxFileSize = 0;

    /**
     * @var Filesystem
     */
    protected $_filesystem;

    /**
     * @var WriteInterface
     */
    protected $_mediaDirectory;

    /**
     * @var UploaderFactory
     */
    protected $_uploaderFactory;

    /**
     * @param Context $context
     * @param Registry $registry
     * @param ScopeConfigInterface $config
     * @param TypeListInterface $cacheTypeList
     * @param UploaderFactory $uploaderFactory
     * @param RequestDataInterface $requestData
     * @param Filesystem $filesystem
     * @param AbstractResource|null $resource
     * @param AbstractDb|null $resourceCollection
     * @param array $data
     *
     * @throws FileSystemException
     */
    public function __construct(
        Context $context,
        Registry $registry,
        ScopeConfigInterface $config,
        TypeListInterface $cacheTypeList,
        UploaderFactory $uploaderFactory,
        RequestDataInterface $requestData,
        Filesystem $filesystem,
        AbstractResource $resource = null,
        AbstractDb $resourceCollection = null,
        array $data = []
    ) {
        $this->_uploaderFactory = $uploaderFactory;
        $this->_requestData = $requestData;
        $this->_filesystem = $filesystem;
        $this->_mediaDirectory = $filesystem->getDirectoryWrite(DirectoryList::MEDIA);
        parent::__construct($context, $registry, $config, $cacheTypeList, $resource, $resourceCollection, $data);
    }

    /**
     * Save uploaded file before saving config value
     *
     * @return $this
     * @throws LocalizedException
     */
    public function beforeSave()
    {
        $value = $this->getValue();
        $file = $this->getFileData();
        if (!empty($file)) {
            $uploadDir = $this->_getUploadDir();
            try {
                /** @var Uploader $uploader */
                $uploader = $this->_uploaderFactory->create(['fileId' => $file]);
                $uploader->setAllowedExtensions($this->_getAllowedExtensions());
                $uploader->setAllowRenameFiles(true);
                $uploader->addValidateCallback('size', $this, 'validateMaxSize');
                $result = $uploader->save($uploadDir);
            } catch (Exception $e) {
                throw new LocalizedException(__('%1', $e->getMessage()));
            }

            $filename = $result['file'];
            if ($filename) {
                if ($this->_addWhetherScopeInfo()) {
                    $filename = $this->_prependScopeInfo($filename);
                }
                $this->setValue($filename);
            }
        } else {
            $value = explode(",", $value);
            if (is_array($value) && !empty($value[0]) && $value[0] == 1) {
                $this->setValue('');
            } elseif (is_array($value) && !empty($value['value'])) {
                $this->setValue($value['value']);
            } else {
                $this->unsValue();
            }
        }

        return $this;
    }

    /**
     * Receiving uploaded file data
     *
     * @return array
     * @since 100.1.0
     */
    protected function getFileData()
    {
        $file = [];
        $value = $this->getValue();
        $tmpName = $this->_requestData->getTmpName($this->getPath());
        if ($tmpName) {
            $file['tmp_name'] = $tmpName;
            $file['name'] = $this->_requestData->getName($this->getPath());
        } elseif (!empty($value['tmp_name'])) {
            $file['tmp_name'] = $value['tmp_name'];
            $file['name'] = $value['value'] ?? $value['name'];
        }

        return $file;
    }

    /**
     * Validation callback for checking max file size
     *
     * @param string $filePath Path to temporary uploaded file
     *
     * @return void
     * @throws LocalizedException
     */
    public function validateMaxSize($filePath)
    {
        $directory = $this->_filesystem->getDirectoryRead(Filesystem\DirectoryList::SYS_TMP);
        if ($this->_maxFileSize > 0
            && $directory->stat($directory->getRelativePath($filePath))['size'] > $this->_maxFileSize * 1024
        ) {
            throw new LocalizedException(
                __('The file you\'re uploading exceeds the server size limit of %1 kilobytes.', $this->_maxFileSize)
            );
        }
    }

    /**
     * Makes a decision about whether to add info about the scope.
     *
     * @return boolean
     */
    protected function _addWhetherScopeInfo()
    {
        $fieldConfig = $this->getFieldConfig();
        $dirParams = $fieldConfig['upload_dir'] ?? [];

        return is_array($dirParams) && isset($dirParams['scope_info']) && $dirParams['scope_info'];
    }

    /**
     * Return path to directory for upload file
     *
     * @return string
     * @throws LocalizedException
     */
    protected function _getUploadDir()
    {
        $fieldConfig = $this->getFieldConfig();

        if (!isset($fieldConfig['upload_dir'])) {
            throw new LocalizedException(
                __('The base directory to upload file is not specified.')
            );
        }

        if (is_array($fieldConfig['upload_dir'])) {
            $uploadDir = $fieldConfig['upload_dir']['value'];
            if (!empty($fieldConfig['upload_dir']['scope_info'])) {
                $uploadDir = $this->_appendScopeInfo($uploadDir);
            }

            if (isset($fieldConfig['upload_dir']['config'])) {
                $uploadDir = $this->getUploadDirPath($uploadDir);
            }
        } else {
            $uploadDir = (string)$fieldConfig['upload_dir'];
        }

        return $uploadDir;
    }

    /**
     * Retrieve upload directory path
     *
     * @param string $uploadDir
     *
     * @return string
     * @since 100.1.0
     */
    protected function getUploadDirPath($uploadDir)
    {
        return $this->_mediaDirectory->getAbsolutePath($uploadDir);
    }

    /**
     * Prepend path with scope info
     *
     * E.g. 'stores/2/path' , 'websites/3/path', 'default/path'
     *
     * @param string $path
     *
     * @return string
     */
    protected function _prependScopeInfo($path)
    {
        $scopeInfo = $this->getScope();
        if (ScopeConfigInterface::SCOPE_TYPE_DEFAULT != $this->getScope()) {
            $scopeInfo .= '/' . $this->getScopeId();
        }

        return $scopeInfo . '/' . $path;
    }

    /**
     * Add scope info to path
     *
     * E.g. 'path/stores/2' , 'path/websites/3', 'path/default'
     *
     * @param string $path
     *
     * @return string
     */
    protected function _appendScopeInfo($path)
    {
        $path .= '/' . $this->getScope();
        if (ScopeConfigInterface::SCOPE_TYPE_DEFAULT != $this->getScope()) {
            $path .= '/' . $this->getScopeId();
        }

        return $path;
    }

    /**
     * Getter for allowed extensions of uploaded files
     *
     * @return array
     */
    protected function _getAllowedExtensions()
    {
        return [];
    }
}