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| 1 | <?php |
| 2 | /** |
| 3 | * This program is free software; you can redistribute it and/or modify |
| 4 | * it under the terms of the GNU General Public License as published by |
| 5 | * the Free Software Foundation; either version 2 of the License, or |
| 6 | * (at your option) any later version. |
| 7 | * |
| 8 | * This program is distributed in the hope that it will be useful, |
| 9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 11 | * GNU General Public License for more details. |
| 12 | * |
| 13 | * You should have received a copy of the GNU General Public License along |
| 14 | * with this program; if not, write to the Free Software Foundation, Inc., |
| 15 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
| 16 | * http://www.gnu.org/copyleft/gpl.html |
| 17 | * |
| 18 | * @file |
| 19 | */ |
| 20 | |
| 21 | use MediaWiki\Linker\LinkTarget; |
| 22 | use MediaWiki\Page\PageIdentity; |
| 23 | use MediaWiki\Title\Title; |
| 24 | use Wikimedia\Mime\MimeAnalyzer; |
| 25 | use Wikimedia\ObjectCache\WANObjectCache; |
| 26 | |
| 27 | /** |
| 28 | * Prioritized list of file repositories. |
| 29 | * |
| 30 | * @ingroup FileRepo |
| 31 | */ |
| 32 | class RepoGroup { |
| 33 | /** @var LocalRepo */ |
| 34 | protected $localRepo; |
| 35 | |
| 36 | /** @var FileRepo[] */ |
| 37 | protected $foreignRepos; |
| 38 | |
| 39 | /** @var WANObjectCache */ |
| 40 | protected $wanCache; |
| 41 | |
| 42 | /** @var bool */ |
| 43 | protected $reposInitialised = false; |
| 44 | |
| 45 | /** @var array */ |
| 46 | protected $localInfo; |
| 47 | |
| 48 | /** @var array */ |
| 49 | protected $foreignInfo; |
| 50 | |
| 51 | /** @var MapCacheLRU */ |
| 52 | protected $cache; |
| 53 | |
| 54 | /** Maximum number of cache items */ |
| 55 | private const MAX_CACHE_SIZE = 500; |
| 56 | |
| 57 | /** @var MimeAnalyzer */ |
| 58 | private $mimeAnalyzer; |
| 59 | |
| 60 | /** |
| 61 | * Construct a group of file repositories. Do not call this -- use |
| 62 | * MediaWikiServices::getRepoGroup. |
| 63 | * |
| 64 | * @param array $localInfo Associative array for local repo's info |
| 65 | * @param array $foreignInfo Array of repository info arrays. |
| 66 | * Each info array is an associative array with the 'class' member |
| 67 | * giving the class name. The entire array is passed to the repository |
| 68 | * constructor as the first parameter. |
| 69 | * @param WANObjectCache $wanCache |
| 70 | * @param MimeAnalyzer $mimeAnalyzer |
| 71 | */ |
| 72 | public function __construct( |
| 73 | $localInfo, |
| 74 | $foreignInfo, |
| 75 | WANObjectCache $wanCache, |
| 76 | MimeAnalyzer $mimeAnalyzer |
| 77 | ) { |
| 78 | $this->localInfo = $localInfo; |
| 79 | $this->foreignInfo = $foreignInfo; |
| 80 | $this->cache = new MapCacheLRU( self::MAX_CACHE_SIZE ); |
| 81 | $this->wanCache = $wanCache; |
| 82 | $this->mimeAnalyzer = $mimeAnalyzer; |
| 83 | } |
| 84 | |
| 85 | /** |
| 86 | * Search repositories for an image. |
| 87 | * |
| 88 | * @param PageIdentity|LinkTarget|string $title The file to find |
| 89 | * @param array $options Associative array of options: |
| 90 | * time: requested time for an archived image, or false for the |
| 91 | * current version. An image object will be returned which was |
| 92 | * created at the specified time. |
| 93 | * ignoreRedirect: If true, do not follow file redirects |
| 94 | * private: If Authority object, return restricted (deleted) files if the |
| 95 | * performer is allowed to view them. Otherwise, such files will not |
| 96 | * be found. Authority is only accepted since 1.37, User was required |
| 97 | * before. |
| 98 | * latest: If true, load from the latest available data into File objects |
| 99 | * @phpcs:ignore Generic.Files.LineLength |
| 100 | * @phan-param array{time?:mixed,ignoreRedirect?:bool,private?:bool|MediaWiki\Permissions\Authority,latest?:bool} $options |
| 101 | * @return File|false False if title is not found |
| 102 | */ |
| 103 | public function findFile( $title, $options = [] ) { |
| 104 | if ( !is_array( $options ) ) { |
| 105 | // MW 1.15 compat |
| 106 | $options = [ 'time' => $options ]; |
| 107 | } |
| 108 | if ( isset( $options['bypassCache'] ) ) { |
| 109 | $options['latest'] = $options['bypassCache']; // b/c |
| 110 | } |
| 111 | if ( isset( $options['time'] ) && $options['time'] !== false ) { |
| 112 | $options['time'] = wfTimestamp( TS_MW, $options['time'] ); |
| 113 | } else { |
| 114 | $options['time'] = false; |
| 115 | } |
| 116 | |
| 117 | if ( !$this->reposInitialised ) { |
| 118 | $this->initialiseRepos(); |
| 119 | } |
| 120 | |
| 121 | $title = File::normalizeTitle( $title ); |
| 122 | if ( !$title ) { |
| 123 | return false; |
| 124 | } |
| 125 | |
| 126 | # Check the cache |
| 127 | $dbkey = $title->getDBkey(); |
| 128 | $timeKey = is_string( $options['time'] ) ? $options['time'] : ''; |
| 129 | if ( empty( $options['ignoreRedirect'] ) |
| 130 | && empty( $options['private'] ) |
| 131 | && empty( $options['latest'] ) |
| 132 | ) { |
| 133 | if ( $this->cache->hasField( $dbkey, $timeKey, 60 ) ) { |
| 134 | return $this->cache->getField( $dbkey, $timeKey ); |
| 135 | } |
| 136 | $useCache = true; |
| 137 | } else { |
| 138 | $useCache = false; |
| 139 | } |
| 140 | |
| 141 | # Check the local repo |
| 142 | $image = $this->localRepo->findFile( $title, $options ); |
| 143 | |
| 144 | # Check the foreign repos |
| 145 | if ( !$image ) { |
| 146 | foreach ( $this->foreignRepos as $repo ) { |
| 147 | $image = $repo->findFile( $title, $options ); |
| 148 | if ( $image ) { |
| 149 | break; |
| 150 | } |
| 151 | } |
| 152 | } |
| 153 | |
| 154 | $image = $image instanceof File ? $image : false; // type check |
| 155 | # Cache file existence or non-existence |
| 156 | if ( $useCache && ( !$image || $image->isCacheable() ) ) { |
| 157 | $this->cache->setField( $dbkey, $timeKey, $image ); |
| 158 | } |
| 159 | |
| 160 | return $image; |
| 161 | } |
| 162 | |
| 163 | /** |
| 164 | * Search repositories for many files at once. |
| 165 | * |
| 166 | * @param array $inputItems An array of titles, or an array of findFile() options with |
| 167 | * the "title" option giving the title. Example: |
| 168 | * |
| 169 | * $findItem = [ 'title' => $title, 'private' => true ]; |
| 170 | * $findBatch = [ $findItem ]; |
| 171 | * $repo->findFiles( $findBatch ); |
| 172 | * |
| 173 | * No title should appear in $items twice, as the result use titles as keys |
| 174 | * @param int $flags Supports: |
| 175 | * - FileRepo::NAME_AND_TIME_ONLY : return a (search title => (title,timestamp)) map. |
| 176 | * The search title uses the input titles; the other is the final post-redirect title. |
| 177 | * All titles are returned as string DB keys and the inner array is associative. |
| 178 | * @return array Map of (file name => File objects) for matches or (search title => (title,timestamp)) |
| 179 | */ |
| 180 | public function findFiles( array $inputItems, $flags = 0 ) { |
| 181 | if ( !$this->reposInitialised ) { |
| 182 | $this->initialiseRepos(); |
| 183 | } |
| 184 | |
| 185 | $items = []; |
| 186 | foreach ( $inputItems as $item ) { |
| 187 | if ( !is_array( $item ) ) { |
| 188 | $item = [ 'title' => $item ]; |
| 189 | } |
| 190 | $item['title'] = File::normalizeTitle( $item['title'] ); |
| 191 | if ( $item['title'] ) { |
| 192 | $items[$item['title']->getDBkey()] = $item; |
| 193 | } |
| 194 | } |
| 195 | |
| 196 | $images = $this->localRepo->findFiles( $items, $flags ); |
| 197 | |
| 198 | foreach ( $this->foreignRepos as $repo ) { |
| 199 | // Remove found files from $items |
| 200 | $items = array_diff_key( $items, $images ); |
| 201 | $images = array_merge( $images, $repo->findFiles( $items, $flags ) ); |
| 202 | } |
| 203 | |
| 204 | return $images; |
| 205 | } |
| 206 | |
| 207 | /** |
| 208 | * Interface for FileRepo::checkRedirect() |
| 209 | * @param PageIdentity|LinkTarget|string $title |
| 210 | * @return Title|false |
| 211 | */ |
| 212 | public function checkRedirect( $title ) { |
| 213 | if ( !$this->reposInitialised ) { |
| 214 | $this->initialiseRepos(); |
| 215 | } |
| 216 | |
| 217 | $title = File::normalizeTitle( $title ); |
| 218 | |
| 219 | $redir = $this->localRepo->checkRedirect( $title ); |
| 220 | if ( $redir ) { |
| 221 | return $redir; |
| 222 | } |
| 223 | |
| 224 | foreach ( $this->foreignRepos as $repo ) { |
| 225 | $redir = $repo->checkRedirect( $title ); |
| 226 | if ( $redir ) { |
| 227 | return $redir; |
| 228 | } |
| 229 | } |
| 230 | |
| 231 | return false; |
| 232 | } |
| 233 | |
| 234 | /** |
| 235 | * Find an instance of the file with this key, created at the specified time |
| 236 | * Returns false if the file does not exist. |
| 237 | * |
| 238 | * @param string $hash Base 36 SHA-1 hash |
| 239 | * @param array $options Option array, same as findFile() |
| 240 | * @return File|false File object or false if it is not found |
| 241 | */ |
| 242 | public function findFileFromKey( $hash, $options = [] ) { |
| 243 | if ( !$this->reposInitialised ) { |
| 244 | $this->initialiseRepos(); |
| 245 | } |
| 246 | |
| 247 | $file = $this->localRepo->findFileFromKey( $hash, $options ); |
| 248 | if ( !$file ) { |
| 249 | foreach ( $this->foreignRepos as $repo ) { |
| 250 | $file = $repo->findFileFromKey( $hash, $options ); |
| 251 | if ( $file ) { |
| 252 | break; |
| 253 | } |
| 254 | } |
| 255 | } |
| 256 | |
| 257 | return $file; |
| 258 | } |
| 259 | |
| 260 | /** |
| 261 | * Find all instances of files with this key |
| 262 | * |
| 263 | * @param string $hash Base 36 SHA-1 hash |
| 264 | * @return File[] |
| 265 | */ |
| 266 | public function findBySha1( $hash ) { |
| 267 | if ( !$this->reposInitialised ) { |
| 268 | $this->initialiseRepos(); |
| 269 | } |
| 270 | |
| 271 | $result = $this->localRepo->findBySha1( $hash ); |
| 272 | foreach ( $this->foreignRepos as $repo ) { |
| 273 | $result = array_merge( $result, $repo->findBySha1( $hash ) ); |
| 274 | } |
| 275 | usort( $result, [ File::class, 'compare' ] ); |
| 276 | |
| 277 | return $result; |
| 278 | } |
| 279 | |
| 280 | /** |
| 281 | * Find all instances of files with this keys |
| 282 | * |
| 283 | * @param string[] $hashes Base 36 SHA-1 hashes |
| 284 | * @return File[][] |
| 285 | */ |
| 286 | public function findBySha1s( array $hashes ) { |
| 287 | if ( !$this->reposInitialised ) { |
| 288 | $this->initialiseRepos(); |
| 289 | } |
| 290 | |
| 291 | $result = $this->localRepo->findBySha1s( $hashes ); |
| 292 | foreach ( $this->foreignRepos as $repo ) { |
| 293 | $result = array_merge_recursive( $result, $repo->findBySha1s( $hashes ) ); |
| 294 | } |
| 295 | // sort the merged (and presorted) sublist of each hash |
| 296 | foreach ( $result as $hash => $files ) { |
| 297 | usort( $result[$hash], [ File::class, 'compare' ] ); |
| 298 | } |
| 299 | |
| 300 | return $result; |
| 301 | } |
| 302 | |
| 303 | /** |
| 304 | * Get the repo instance with a given key. |
| 305 | * @param string|int $index |
| 306 | * @return FileRepo|false |
| 307 | */ |
| 308 | public function getRepo( $index ) { |
| 309 | if ( !$this->reposInitialised ) { |
| 310 | $this->initialiseRepos(); |
| 311 | } |
| 312 | if ( $index === 'local' ) { |
| 313 | return $this->localRepo; |
| 314 | } |
| 315 | return $this->foreignRepos[$index] ?? false; |
| 316 | } |
| 317 | |
| 318 | /** |
| 319 | * Get the repo instance by its name |
| 320 | * @param string $name |
| 321 | * @return FileRepo|false |
| 322 | */ |
| 323 | public function getRepoByName( $name ) { |
| 324 | if ( !$this->reposInitialised ) { |
| 325 | $this->initialiseRepos(); |
| 326 | } |
| 327 | foreach ( $this->foreignRepos as $repo ) { |
| 328 | if ( $repo->name == $name ) { |
| 329 | return $repo; |
| 330 | } |
| 331 | } |
| 332 | |
| 333 | return false; |
| 334 | } |
| 335 | |
| 336 | /** |
| 337 | * Get the local repository, i.e. the one corresponding to the local image |
| 338 | * table. Files are typically uploaded to the local repository. |
| 339 | * |
| 340 | * @return LocalRepo |
| 341 | */ |
| 342 | public function getLocalRepo() { |
| 343 | // @phan-suppress-next-line PhanTypeMismatchReturnSuperType |
| 344 | return $this->getRepo( 'local' ); |
| 345 | } |
| 346 | |
| 347 | /** |
| 348 | * Call a function for each foreign repo, with the repo object as the |
| 349 | * first parameter. |
| 350 | * |
| 351 | * @param callable $callback The function to call |
| 352 | * @param array $params Optional additional parameters to pass to the function |
| 353 | * @return bool |
| 354 | */ |
| 355 | public function forEachForeignRepo( $callback, $params = [] ) { |
| 356 | if ( !$this->reposInitialised ) { |
| 357 | $this->initialiseRepos(); |
| 358 | } |
| 359 | foreach ( $this->foreignRepos as $repo ) { |
| 360 | if ( $callback( $repo, ...$params ) ) { |
| 361 | return true; |
| 362 | } |
| 363 | } |
| 364 | |
| 365 | return false; |
| 366 | } |
| 367 | |
| 368 | /** |
| 369 | * Does the installation have any foreign repos set up? |
| 370 | * @return bool |
| 371 | */ |
| 372 | public function hasForeignRepos() { |
| 373 | if ( !$this->reposInitialised ) { |
| 374 | $this->initialiseRepos(); |
| 375 | } |
| 376 | return (bool)$this->foreignRepos; |
| 377 | } |
| 378 | |
| 379 | /** |
| 380 | * Initialise the $repos array |
| 381 | */ |
| 382 | public function initialiseRepos() { |
| 383 | if ( $this->reposInitialised ) { |
| 384 | return; |
| 385 | } |
| 386 | $this->reposInitialised = true; |
| 387 | |
| 388 | $this->localRepo = $this->newRepo( $this->localInfo ); |
| 389 | $this->foreignRepos = []; |
| 390 | foreach ( $this->foreignInfo as $key => $info ) { |
| 391 | $this->foreignRepos[$key] = $this->newRepo( $info ); |
| 392 | } |
| 393 | } |
| 394 | |
| 395 | /** |
| 396 | * Create a local repo with the specified option overrides. |
| 397 | * |
| 398 | * @param array $info |
| 399 | * @return LocalRepo |
| 400 | */ |
| 401 | public function newCustomLocalRepo( $info = [] ) { |
| 402 | // @phan-suppress-next-line PhanTypeMismatchReturnSuperType |
| 403 | return $this->newRepo( $info + $this->localInfo ); |
| 404 | } |
| 405 | |
| 406 | /** |
| 407 | * Create a repo class based on an info structure |
| 408 | * @param array $info |
| 409 | * @return FileRepo |
| 410 | */ |
| 411 | protected function newRepo( $info ) { |
| 412 | $class = $info['class']; |
| 413 | |
| 414 | $info['wanCache'] = $this->wanCache; |
| 415 | |
| 416 | return new $class( $info ); |
| 417 | } |
| 418 | |
| 419 | /** |
| 420 | * Split a virtual URL into repo, zone and rel parts |
| 421 | * @param string $url |
| 422 | * @return string[] Containing repo, zone and rel |
| 423 | */ |
| 424 | private function splitVirtualUrl( $url ) { |
| 425 | if ( !str_starts_with( $url, 'mwrepo://' ) ) { |
| 426 | throw new InvalidArgumentException( __METHOD__ . ': unknown protocol' ); |
| 427 | } |
| 428 | |
| 429 | $bits = explode( '/', substr( $url, 9 ), 3 ); |
| 430 | if ( count( $bits ) != 3 ) { |
| 431 | throw new InvalidArgumentException( __METHOD__ . ": invalid mwrepo URL: $url" ); |
| 432 | } |
| 433 | |
| 434 | return $bits; |
| 435 | } |
| 436 | |
| 437 | /** |
| 438 | * @param string $fileName |
| 439 | * @return array |
| 440 | */ |
| 441 | public function getFileProps( $fileName ) { |
| 442 | if ( FileRepo::isVirtualUrl( $fileName ) ) { |
| 443 | [ $repoName, /* $zone */, /* $rel */ ] = $this->splitVirtualUrl( $fileName ); |
| 444 | if ( $repoName === '' ) { |
| 445 | $repoName = 'local'; |
| 446 | } |
| 447 | $repo = $this->getRepo( $repoName ); |
| 448 | |
| 449 | return $repo->getFileProps( $fileName ); |
| 450 | } else { |
| 451 | $mwProps = new MWFileProps( $this->mimeAnalyzer ); |
| 452 | |
| 453 | return $mwProps->getPropsFromPath( $fileName, true ); |
| 454 | } |
| 455 | } |
| 456 | |
| 457 | /** |
| 458 | * Clear RepoGroup process cache used for finding a file |
| 459 | * @param PageIdentity|string|null $title File page or file name, or null to clear all files |
| 460 | */ |
| 461 | public function clearCache( $title = null ) { |
| 462 | if ( $title == null ) { |
| 463 | $this->cache->clear(); |
| 464 | } elseif ( is_string( $title ) ) { |
| 465 | $this->cache->clear( $title ); |
| 466 | } else { |
| 467 | $this->cache->clear( $title->getDBkey() ); |
| 468 | } |
| 469 | } |
| 470 | } |