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| 1 | <?php |
| 2 | |
| 3 | /** |
| 4 | * Composes attachment filenames from an original name and an optional custom base name. |
| 5 | * |
| 6 | * This Source Code Form is subject to the terms of the Mozilla Public License, |
| 7 | * v. 2.0. If a copy of the MPL was not distributed with this file, You can |
| 8 | * obtain one at https://mozilla.org/MPL/2.0/. |
| 9 | * |
| 10 | * @package phpMyFAQ |
| 11 | * @author Thorsten Rinne <thorsten@phpmyfaq.de> |
| 12 | * @copyright 2026 phpMyFAQ Team |
| 13 | * @license https://www.mozilla.org/MPL/2.0/ Mozilla Public License Version 2.0 |
| 14 | * @link https://www.phpmyfaq.de |
| 15 | * @since 2026-06-22 |
| 16 | */ |
| 17 | |
| 18 | declare(strict_types=1); |
| 19 | |
| 20 | namespace phpMyFAQ\Attachment; |
| 21 | |
| 22 | final class Filename |
| 23 | { |
| 24 | /** |
| 25 | * Builds the filename to store for an uploaded attachment. |
| 26 | * |
| 27 | * When no custom name is given (null or whitespace-only), the original name |
| 28 | * is kept unchanged. Otherwise the custom name is reduced to a safe base name |
| 29 | * and the original extension is always re-applied so the file ending never |
| 30 | * changes. |
| 31 | * |
| 32 | * Following PHP's pathinfo() semantics, a leading dot in the original name is NOT |
| 33 | * treated as solely a name prefix: ".htaccess" yields extension "htaccess", so |
| 34 | * a custom name will be returned with that extension appended. |
| 35 | */ |
| 36 | public static function compose(string $originalName, ?string $customName): string |
| 37 | { |
| 38 | $customName = trim($customName ?? ''); |
| 39 | if ($customName === '') { |
| 40 | return $originalName; |
| 41 | } |
| 42 | |
| 43 | $base = pathinfo(basename($customName), PATHINFO_FILENAME); |
| 44 | if ($base === '') { |
| 45 | return $originalName; |
| 46 | } |
| 47 | |
| 48 | $extension = pathinfo($originalName, PATHINFO_EXTENSION); |
| 49 | |
| 50 | return $extension === '' ? $base : $base . '.' . $extension; |
| 51 | } |
| 52 | } |