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| 1 | <?php |
| 2 | |
| 3 | /** |
| 4 | * S3 storage implementation. |
| 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 2026-02-08 |
| 16 | */ |
| 17 | |
| 18 | declare(strict_types=1); |
| 19 | |
| 20 | namespace phpMyFAQ\Storage; |
| 21 | |
| 22 | use ArrayAccess; |
| 23 | use Throwable; |
| 24 | |
| 25 | final readonly class S3Storage implements StorageInterface |
| 26 | { |
| 27 | public function __construct( |
| 28 | private object $client, |
| 29 | private string $bucket, |
| 30 | private string $prefix = '', |
| 31 | private ?string $publicBaseUrl = null, |
| 32 | ) { |
| 33 | } |
| 34 | |
| 35 | public function put(string $path, string $contents): bool |
| 36 | { |
| 37 | $key = $this->buildKey($path); |
| 38 | $this->run(fn(): mixed => $this->client->putObject([ |
| 39 | 'Bucket' => $this->bucket, |
| 40 | 'Key' => $key, |
| 41 | 'Body' => $contents, |
| 42 | ])); |
| 43 | |
| 44 | return true; |
| 45 | } |
| 46 | |
| 47 | public function putStream(string $path, mixed $stream): bool |
| 48 | { |
| 49 | if (!is_resource($stream)) { |
| 50 | throw new StorageException('Stream must be a valid resource.'); |
| 51 | } |
| 52 | |
| 53 | $key = $this->buildKey($path); |
| 54 | $this->run(fn(): mixed => $this->client->putObject([ |
| 55 | 'Bucket' => $this->bucket, |
| 56 | 'Key' => $key, |
| 57 | 'Body' => $stream, |
| 58 | ])); |
| 59 | |
| 60 | return true; |
| 61 | } |
| 62 | |
| 63 | public function get(string $path): string |
| 64 | { |
| 65 | $key = $this->buildKey($path); |
| 66 | $result = $this->run(fn(): mixed => $this->client->getObject([ |
| 67 | 'Bucket' => $this->bucket, |
| 68 | 'Key' => $key, |
| 69 | ])); |
| 70 | |
| 71 | if (!$this->hasResultField($result, 'Body')) { |
| 72 | throw new StorageException('Invalid S3 response while reading object: ' . $key); |
| 73 | } |
| 74 | |
| 75 | return (string) $this->getResultField($result, 'Body'); |
| 76 | } |
| 77 | |
| 78 | public function delete(string $path): bool |
| 79 | { |
| 80 | $key = $this->buildKey($path); |
| 81 | $this->run(fn(): mixed => $this->client->deleteObject([ |
| 82 | 'Bucket' => $this->bucket, |
| 83 | 'Key' => $key, |
| 84 | ])); |
| 85 | |
| 86 | return true; |
| 87 | } |
| 88 | |
| 89 | public function exists(string $path): bool |
| 90 | { |
| 91 | $key = $this->buildKey($path); |
| 92 | |
| 93 | return (bool) $this->run(fn(): mixed => $this->client->doesObjectExistV2($this->bucket, $key)); |
| 94 | } |
| 95 | |
| 96 | public function url(string $path): string |
| 97 | { |
| 98 | $key = $this->buildKey($path); |
| 99 | if ($this->publicBaseUrl !== null && $this->publicBaseUrl !== '') { |
| 100 | return rtrim(string: $this->publicBaseUrl, characters: '/') . '/' . $key; |
| 101 | } |
| 102 | |
| 103 | $result = $this->run(fn(): mixed => $this->client->getObjectUrl($this->bucket, $key)); |
| 104 | |
| 105 | return (string) $result; |
| 106 | } |
| 107 | |
| 108 | public function size(string $path): int |
| 109 | { |
| 110 | $key = $this->buildKey($path); |
| 111 | $result = $this->run(fn(): mixed => $this->client->headObject([ |
| 112 | 'Bucket' => $this->bucket, |
| 113 | 'Key' => $key, |
| 114 | ])); |
| 115 | |
| 116 | if (!$this->hasResultField($result, 'ContentLength')) { |
| 117 | throw new StorageException('Invalid S3 response while reading object size: ' . $key); |
| 118 | } |
| 119 | |
| 120 | return (int) $this->getResultField($result, 'ContentLength'); |
| 121 | } |
| 122 | |
| 123 | /** |
| 124 | * @param callable(): mixed $callback |
| 125 | */ |
| 126 | private function run(callable $callback): mixed |
| 127 | { |
| 128 | try { |
| 129 | return $callback(); |
| 130 | } catch (Throwable $throwable) { |
| 131 | throw new StorageException(message: $throwable->getMessage(), previous: $throwable); |
| 132 | } |
| 133 | } |
| 134 | |
| 135 | private function buildKey(string $path): string |
| 136 | { |
| 137 | $normalizedPath = ltrim(string: str_replace(search: '\\', replace: '/', subject: trim($path)), characters: '/'); |
| 138 | if ($normalizedPath === '') { |
| 139 | throw new StorageException('Invalid storage path.'); |
| 140 | } |
| 141 | |
| 142 | $segments = explode('/', $normalizedPath); |
| 143 | foreach ($segments as $segment) { |
| 144 | if ($segment === '..' || $segment === '') { |
| 145 | throw new StorageException('Invalid storage path.'); |
| 146 | } |
| 147 | } |
| 148 | |
| 149 | if ($this->prefix === '') { |
| 150 | return $normalizedPath; |
| 151 | } |
| 152 | |
| 153 | return trim(string: $this->prefix, characters: '/') . '/' . $normalizedPath; |
| 154 | } |
| 155 | |
| 156 | private function hasResultField(mixed $result, string $field): bool |
| 157 | { |
| 158 | if (is_array($result)) { |
| 159 | return array_key_exists($field, $result); |
| 160 | } |
| 161 | |
| 162 | if ($result instanceof ArrayAccess) { |
| 163 | return $result->offsetExists($field); |
| 164 | } |
| 165 | |
| 166 | return false; |
| 167 | } |
| 168 | |
| 169 | private function getResultField(mixed $result, string $field): mixed |
| 170 | { |
| 171 | if (is_array($result)) { |
| 172 | return $result[$field] ?? null; |
| 173 | } |
| 174 | |
| 175 | if ($result instanceof ArrayAccess) { |
| 176 | return $result->offsetGet($field); |
| 177 | } |
| 178 | |
| 179 | return null; |
| 180 | } |
| 181 | } |