File ext-form-field-file/src/MvcCore/Ext/Forms/Validators/Files/Validations/NameAndExtension.php

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<?php

/**
 * MvcCore
 *
 * This source file is subject to the BSD 3 License
 * For the full copyright and license information, please view 
 * the LICENSE.md file that are distributed with this source code.
 *
 * @copyright   Copyright (c) 2016 Tom Flidr (https://github.com/mvccore)
 * @license     https://mvccore.github.io/docs/mvccore/5.0.0/LICENCE.md
 */

namespace MvcCore\Ext\Forms\Validators\Files\Validations;

/**
 * Responsibility: 
 */
trait NameAndExtension {

    /**
     * Sanitize safe file name and sanitize max. file name length
     * and add file extension info `$file` `\stdClass` collection.
     * @param \stdClass & $file
     * @return void
     */
    protected function validateNameAndExtension (& $file) {
        // Sanitize safe file name:
        $allowedFileNameCharsPattern = '#[^' 
            . addcslashes($this->allowedFileNameChars, "#[](){}<>?!=^$.+|:") 
        . ']#';
        $file->name = preg_replace(
            $allowedFileNameCharsPattern, '', $file->name
        );
        $file->name = str_replace('..', '', $file->name);
        // Sanitize max. file name length:
        $pathInfo = pathinfo($file->name);
        $file->name = $pathInfo['basename'];
        $extension = mb_strtolower($pathInfo['extension']);
        $file->extension = $extension;
        if (strtoupper(substr(PHP_OS, 0, 3)) === 'WIN') {
            $winReservedFileNames = explode(',', static::WIN_RESERVED_FILENAMES);
            if (in_array(mb_strtoupper($file->name), $winReservedFileNames, TRUE)) 
                return $this->handleUploadError(
                    static::UPLOAD_ERR_RESERVED_NAME, [$file->name]
                );
            if (in_array(mb_strtoupper($pathInfo['filename']), $winReservedFileNames, TRUE)) 
                return $this->handleUploadError(
                    static::UPLOAD_ERR_RESERVED_NAME, [$pathInfo['filename']]
                );
        }
        if (mb_strlen($file->name) > 255) {
            $extensionLength = mb_strlen($extension);
            if ($extensionLength > 0) {
                $fileName = basename($file->name, '.' . $extension);
                $file->name = mb_substr($fileName, 0, 255 - 1 - $extensionLength) . '.' . $extension;
            } else {
                $file->name = mb_substr($file->name, 0, 255);
            }
        }
    }
}

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