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| 1 | <?php |
| 2 | /** |
| 3 | * |
| 4 | * This file is part of the phpBB Forum Software package. |
| 5 | * |
| 6 | * @copyright (c) phpBB Limited <https://www.phpbb.com> |
| 7 | * @license GNU General Public License, version 2 (GPL-2.0) |
| 8 | * |
| 9 | * For full copyright and license information, please see |
| 10 | * the docs/CREDITS.txt file. |
| 11 | * |
| 12 | */ |
| 13 | |
| 14 | namespace phpbb\storage; |
| 15 | |
| 16 | use phpbb\cache\driver\driver_interface as cache; |
| 17 | use phpbb\db\driver\driver_interface as db; |
| 18 | use phpbb\storage\adapter\adapter_interface; |
| 19 | use phpbb\storage\exception\storage_exception; |
| 20 | |
| 21 | /** |
| 22 | * Experimental |
| 23 | */ |
| 24 | class storage |
| 25 | { |
| 26 | /** |
| 27 | * @var adapter_interface |
| 28 | */ |
| 29 | protected $adapter; |
| 30 | |
| 31 | /** |
| 32 | * @var db |
| 33 | */ |
| 34 | protected $db; |
| 35 | |
| 36 | /** |
| 37 | * Cache driver |
| 38 | * @var cache |
| 39 | */ |
| 40 | protected $cache; |
| 41 | |
| 42 | /** |
| 43 | * @var adapter_factory |
| 44 | */ |
| 45 | protected $factory; |
| 46 | |
| 47 | /** |
| 48 | * @var string |
| 49 | */ |
| 50 | protected $storage_name; |
| 51 | |
| 52 | /** |
| 53 | * @var string |
| 54 | */ |
| 55 | protected $storage_table; |
| 56 | |
| 57 | /** |
| 58 | * Constructor |
| 59 | * |
| 60 | * @param db $db |
| 61 | * @param cache $cache |
| 62 | * @param adapter_factory $factory |
| 63 | * @param string $storage_name |
| 64 | * @param string $storage_table |
| 65 | */ |
| 66 | public function __construct(db $db, cache $cache, adapter_factory $factory, $storage_name, $storage_table) |
| 67 | { |
| 68 | $this->db = $db; |
| 69 | $this->cache = $cache; |
| 70 | $this->factory = $factory; |
| 71 | $this->storage_name = $storage_name; |
| 72 | $this->storage_table = $storage_table; |
| 73 | } |
| 74 | |
| 75 | /** |
| 76 | * Returns storage name |
| 77 | * |
| 78 | * @return string |
| 79 | */ |
| 80 | public function get_name() |
| 81 | { |
| 82 | return $this->storage_name; |
| 83 | } |
| 84 | |
| 85 | /** |
| 86 | * Returns an adapter instance |
| 87 | * |
| 88 | * @return adapter_interface |
| 89 | */ |
| 90 | protected function get_adapter() |
| 91 | { |
| 92 | if ($this->adapter === null) |
| 93 | { |
| 94 | $this->adapter = $this->factory->get($this->storage_name); |
| 95 | } |
| 96 | |
| 97 | return $this->adapter; |
| 98 | } |
| 99 | |
| 100 | /** |
| 101 | * Dumps content into a file |
| 102 | * |
| 103 | * @param string $path The file to be written to. |
| 104 | * @param string $content The data to write into the file. |
| 105 | * |
| 106 | * @throws storage_exception When the file already exists |
| 107 | * When the file cannot be written |
| 108 | */ |
| 109 | public function put_contents($path, $content) |
| 110 | { |
| 111 | if ($this->exists($path)) |
| 112 | { |
| 113 | throw new storage_exception('STORAGE_FILE_EXISTS', $path); |
| 114 | } |
| 115 | |
| 116 | $this->get_adapter()->put_contents($path, $content); |
| 117 | $this->track_file($path); |
| 118 | } |
| 119 | |
| 120 | /** |
| 121 | * Read the contents of a file |
| 122 | * |
| 123 | * @param string $path The file to read |
| 124 | * |
| 125 | * @return string Returns file contents |
| 126 | * |
| 127 | * @throws storage_exception When the file doesn't exist |
| 128 | * When cannot read file contents |
| 129 | * |
| 130 | */ |
| 131 | public function get_contents($path) |
| 132 | { |
| 133 | if (!$this->exists($path)) |
| 134 | { |
| 135 | throw new storage_exception('STORAGE_FILE_NO_EXIST', $path); |
| 136 | } |
| 137 | |
| 138 | return $this->get_adapter()->get_contents($path); |
| 139 | } |
| 140 | |
| 141 | /** |
| 142 | * Checks the existence of files or directories |
| 143 | * |
| 144 | * @param string $path file/directory to check |
| 145 | * @param bool $full_check check in the filesystem too |
| 146 | * |
| 147 | * @return bool Returns true if the file/directory exist, false otherwise |
| 148 | */ |
| 149 | public function exists($path, $full_check = false) |
| 150 | { |
| 151 | return ($this->is_tracked($path) && (!$full_check || $this->get_adapter()->exists($path))); |
| 152 | } |
| 153 | |
| 154 | /** |
| 155 | * Removes files or directories |
| 156 | * |
| 157 | * @param string $path file/directory to remove |
| 158 | * |
| 159 | * @throws storage_exception When removal fails |
| 160 | * When the file doesn't exist |
| 161 | */ |
| 162 | public function delete($path) |
| 163 | { |
| 164 | if (!$this->exists($path)) |
| 165 | { |
| 166 | throw new storage_exception('STORAGE_FILE_NO_EXIST', $path); |
| 167 | } |
| 168 | |
| 169 | $this->get_adapter()->delete($path); |
| 170 | $this->untrack_file($path); |
| 171 | } |
| 172 | |
| 173 | /** |
| 174 | * Rename a file or a directory |
| 175 | * |
| 176 | * @param string $path_orig The original file/direcotry |
| 177 | * @param string $path_dest The target file/directory |
| 178 | * |
| 179 | * @throws storage_exception When the file doesn't exist |
| 180 | * When target exists |
| 181 | * When file/directory cannot be renamed |
| 182 | */ |
| 183 | public function rename($path_orig, $path_dest) |
| 184 | { |
| 185 | if (!$this->exists($path_orig)) |
| 186 | { |
| 187 | throw new storage_exception('STORAGE_FILE_NO_EXIST', $path_orig); |
| 188 | } |
| 189 | |
| 190 | if ($this->exists($path_dest)) |
| 191 | { |
| 192 | throw new storage_exception('STORAGE_FILE_EXISTS', $path_dest); |
| 193 | } |
| 194 | |
| 195 | $this->get_adapter()->rename($path_orig, $path_dest); |
| 196 | $this->track_rename($path_orig, $path_dest); |
| 197 | } |
| 198 | |
| 199 | /** |
| 200 | * Copies a file |
| 201 | * |
| 202 | * @param string $path_orig The original filename |
| 203 | * @param string $path_dest The target filename |
| 204 | * |
| 205 | * @throws storage_exception When the file doesn't exist |
| 206 | * When target exists |
| 207 | * When the file cannot be copied |
| 208 | */ |
| 209 | public function copy($path_orig, $path_dest) |
| 210 | { |
| 211 | if (!$this->exists($path_orig)) |
| 212 | { |
| 213 | throw new storage_exception('STORAGE_FILE_NO_EXIST', $path_orig); |
| 214 | } |
| 215 | |
| 216 | if ($this->exists($path_dest)) |
| 217 | { |
| 218 | throw new storage_exception('STORAGE_FILE_EXISTS', $path_dest); |
| 219 | } |
| 220 | |
| 221 | $this->get_adapter()->copy($path_orig, $path_dest); |
| 222 | $this->track_file($path_dest); |
| 223 | } |
| 224 | |
| 225 | /** |
| 226 | * Reads a file as a stream |
| 227 | * |
| 228 | * @param string $path File to read |
| 229 | * |
| 230 | * @return resource Returns a file pointer |
| 231 | * @throws storage_exception When the file doesn't exist |
| 232 | * When unable to open file |
| 233 | * |
| 234 | */ |
| 235 | public function read_stream($path) |
| 236 | { |
| 237 | if (!$this->exists($path)) |
| 238 | { |
| 239 | throw new storage_exception('STORAGE_FILE_NO_EXIST', $path); |
| 240 | } |
| 241 | |
| 242 | $stream = null; |
| 243 | $adapter = $this->get_adapter(); |
| 244 | |
| 245 | if ($adapter instanceof stream_interface) |
| 246 | { |
| 247 | $stream = $adapter->read_stream($path); |
| 248 | } |
| 249 | else |
| 250 | { |
| 251 | // Simulate the stream |
| 252 | $stream = fopen('php://temp', 'w+b'); |
| 253 | fwrite($stream, $adapter->get_contents($path)); |
| 254 | rewind($stream); |
| 255 | } |
| 256 | |
| 257 | return $stream; |
| 258 | } |
| 259 | |
| 260 | /** |
| 261 | * Writes a new file using a stream |
| 262 | * |
| 263 | * @param string $path The target file |
| 264 | * @param resource $resource The resource |
| 265 | * |
| 266 | * @throws storage_exception When the file exist |
| 267 | * When target file cannot be created |
| 268 | */ |
| 269 | public function write_stream($path, $resource) |
| 270 | { |
| 271 | if ($this->exists($path)) |
| 272 | { |
| 273 | throw new storage_exception('STORAGE_FILE_EXISTS', $path); |
| 274 | } |
| 275 | |
| 276 | if (!is_resource($resource)) |
| 277 | { |
| 278 | throw new storage_exception('STORAGE_INVALID_RESOURCE'); |
| 279 | } |
| 280 | |
| 281 | $adapter = $this->get_adapter(); |
| 282 | |
| 283 | if ($adapter instanceof stream_interface) |
| 284 | { |
| 285 | $adapter->write_stream($path, $resource); |
| 286 | $this->track_file($path); |
| 287 | } |
| 288 | else |
| 289 | { |
| 290 | // Simulate the stream |
| 291 | $adapter->put_contents($path, stream_get_contents($resource)); |
| 292 | } |
| 293 | } |
| 294 | |
| 295 | /** |
| 296 | * Track file in database |
| 297 | * |
| 298 | * @param string $path The target file |
| 299 | * @param bool $update Update file size when already tracked |
| 300 | */ |
| 301 | public function track_file($path, $update = false) |
| 302 | { |
| 303 | if (!$this->get_adapter()->exists($path)) |
| 304 | { |
| 305 | throw new storage_exception('STORAGE_FILE_NO_EXIST', $path); |
| 306 | } |
| 307 | |
| 308 | $sql_ary = array( |
| 309 | 'file_path' => $path, |
| 310 | 'storage' => $this->get_name(), |
| 311 | ); |
| 312 | |
| 313 | // Get file, if exist update filesize, if not add new record |
| 314 | $sql = 'SELECT * FROM ' . $this->storage_table . ' |
| 315 | WHERE ' . $this->db->sql_build_array('SELECT', $sql_ary); |
| 316 | $result = $this->db->sql_query($sql); |
| 317 | $row = $this->db->sql_fetchrow($result); |
| 318 | $this->db->sql_freeresult($result); |
| 319 | |
| 320 | if (!$row) |
| 321 | { |
| 322 | // Don't call the file_info method, because it check's if the file is tracked |
| 323 | // and is not (for now). This method check if the file exists using the adapter |
| 324 | // at the beginning. |
| 325 | $file = new file_info($this->get_adapter(), $path); |
| 326 | $sql_ary['filesize'] = $file->size; |
| 327 | |
| 328 | $sql = 'INSERT INTO ' . $this->storage_table . $this->db->sql_build_array('INSERT', $sql_ary); |
| 329 | $this->db->sql_query($sql); |
| 330 | } |
| 331 | else if ($update) |
| 332 | { |
| 333 | $file = $this->file_info($path); |
| 334 | $sql = 'UPDATE ' . $this->storage_table . ' |
| 335 | SET filesize = ' . $file->size . ' |
| 336 | WHERE ' . $this->db->sql_build_array('SELECT', $sql_ary); |
| 337 | $this->db->sql_query($sql); |
| 338 | } |
| 339 | |
| 340 | $this->cache->destroy('_storage_' . $this->get_name() . '_totalsize'); |
| 341 | $this->cache->destroy('_storage_' . $this->get_name() . '_numfiles'); |
| 342 | } |
| 343 | |
| 344 | /** |
| 345 | * Untrack file |
| 346 | * |
| 347 | * @param string $path The target file |
| 348 | */ |
| 349 | public function untrack_file($path) |
| 350 | { |
| 351 | $sql_ary = array( |
| 352 | 'file_path' => $path, |
| 353 | 'storage' => $this->get_name(), |
| 354 | ); |
| 355 | |
| 356 | $sql = 'DELETE FROM ' . $this->storage_table . ' |
| 357 | WHERE ' . $this->db->sql_build_array('DELETE', $sql_ary); |
| 358 | $this->db->sql_query($sql); |
| 359 | |
| 360 | $this->cache->destroy('_storage_' . $this->get_name() . '_totalsize'); |
| 361 | $this->cache->destroy('_storage_' . $this->get_name() . '_numfiles'); |
| 362 | } |
| 363 | |
| 364 | /** |
| 365 | * Check if a file is tracked |
| 366 | * |
| 367 | * @param string $path The file |
| 368 | * |
| 369 | * @return bool True if file is tracked |
| 370 | */ |
| 371 | public function is_tracked($path) |
| 372 | { |
| 373 | $sql_ary = array( |
| 374 | 'file_path' => $path, |
| 375 | 'storage' => $this->get_name(), |
| 376 | ); |
| 377 | |
| 378 | $sql = 'SELECT file_id FROM ' . $this->storage_table . ' |
| 379 | WHERE ' . $this->db->sql_build_array('SELECT', $sql_ary); |
| 380 | $result = $this->db->sql_query($sql); |
| 381 | $row = $this->db->sql_fetchrow($result); |
| 382 | $this->db->sql_freeresult($result); |
| 383 | |
| 384 | return ($row) ? true : false; |
| 385 | } |
| 386 | |
| 387 | /** |
| 388 | * Rename tracked file |
| 389 | * |
| 390 | * @param string $path_orig The original file/direcotry |
| 391 | * @param string $path_dest The target file/directory |
| 392 | */ |
| 393 | protected function track_rename($path_orig, $path_dest) |
| 394 | { |
| 395 | $sql = 'UPDATE ' . $this->storage_table . " |
| 396 | SET file_path = '" . $this->db->sql_escape($path_dest) . "' |
| 397 | WHERE file_path = '" . $this->db->sql_escape($path_orig) . "' |
| 398 | AND storage = '" . $this->db->sql_escape($this->get_name()) . "'"; |
| 399 | $this->db->sql_query($sql); |
| 400 | } |
| 401 | |
| 402 | /** |
| 403 | * Get file info |
| 404 | * |
| 405 | * @param string $path The file |
| 406 | * |
| 407 | * @return \phpbb\storage\file_info Returns file_info object |
| 408 | * @throws storage_exception When the adapter doesn't implement the method |
| 409 | * When the file doesn't exist |
| 410 | * |
| 411 | */ |
| 412 | public function file_info($path) |
| 413 | { |
| 414 | if (!$this->exists($path)) |
| 415 | { |
| 416 | throw new storage_exception('STORAGE_FILE_NO_EXIST', $path); |
| 417 | } |
| 418 | |
| 419 | return new file_info($this->get_adapter(), $path); |
| 420 | } |
| 421 | |
| 422 | /** |
| 423 | * Get direct link |
| 424 | * |
| 425 | * @param string $path The file |
| 426 | * |
| 427 | * @return string Returns link. |
| 428 | * |
| 429 | */ |
| 430 | public function get_link($path) |
| 431 | { |
| 432 | return $this->get_adapter()->get_link($path); |
| 433 | } |
| 434 | |
| 435 | /** |
| 436 | * Get total storage size |
| 437 | * |
| 438 | * @return int Size in bytes |
| 439 | */ |
| 440 | public function get_size() |
| 441 | { |
| 442 | $total_size = $this->cache->get('_storage_' . $this->get_name() . '_totalsize'); |
| 443 | |
| 444 | if ($total_size === false) |
| 445 | { |
| 446 | $sql = 'SELECT SUM(filesize) AS totalsize |
| 447 | FROM ' . $this->storage_table . " |
| 448 | WHERE storage = '" . $this->db->sql_escape($this->get_name()) . "'"; |
| 449 | $result = $this->db->sql_query($sql); |
| 450 | |
| 451 | $total_size = (int) $this->db->sql_fetchfield('totalsize'); |
| 452 | $this->cache->put('_storage_' . $this->get_name() . '_totalsize', $total_size); |
| 453 | |
| 454 | $this->db->sql_freeresult($result); |
| 455 | } |
| 456 | |
| 457 | return (int) $total_size; |
| 458 | } |
| 459 | |
| 460 | /** |
| 461 | * Get number of storage files |
| 462 | * |
| 463 | * @return int Number of files |
| 464 | */ |
| 465 | public function get_num_files() |
| 466 | { |
| 467 | $number_files = $this->cache->get('_storage_' . $this->get_name() . '_numfiles'); |
| 468 | |
| 469 | if ($number_files === false) |
| 470 | { |
| 471 | $sql = 'SELECT COUNT(file_id) AS numfiles |
| 472 | FROM ' . $this->storage_table . " |
| 473 | WHERE storage = '" . $this->db->sql_escape($this->get_name()) . "'"; |
| 474 | $result = $this->db->sql_query($sql); |
| 475 | |
| 476 | $number_files = (int) $this->db->sql_fetchfield('numfiles'); |
| 477 | $this->cache->put('_storage_' . $this->get_name() . '_numfiles', $number_files); |
| 478 | |
| 479 | $this->db->sql_freeresult($result); |
| 480 | } |
| 481 | |
| 482 | return (int) $number_files; |
| 483 | } |
| 484 | |
| 485 | /** |
| 486 | * Get space available in bytes |
| 487 | * |
| 488 | * @return float Returns available space |
| 489 | * @throws storage_exception When unable to retrieve available storage space |
| 490 | * |
| 491 | */ |
| 492 | public function free_space() |
| 493 | { |
| 494 | return $this->get_adapter()->free_space(); |
| 495 | } |
| 496 | } |