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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 |
| 14 | * along with this program; if not, write to the Free Software |
| 15 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA |
| 16 | * |
| 17 | * @file |
| 18 | */ |
| 19 | |
| 20 | namespace MediaWiki\Actions; |
| 21 | |
| 22 | use Action; |
| 23 | use Article; |
| 24 | use CreditsAction; |
| 25 | use InfoAction; |
| 26 | use MarkpatrolledAction; |
| 27 | use McrRestoreAction; |
| 28 | use McrUndoAction; |
| 29 | use MediaWiki\Context\IContextSource; |
| 30 | use MediaWiki\Context\RequestContext; |
| 31 | use MediaWiki\HookContainer\HookContainer; |
| 32 | use MediaWiki\HookContainer\HookRunner; |
| 33 | use MediaWiki\Page\PageIdentity; |
| 34 | use MediaWiki\Title\Title; |
| 35 | use Psr\Log\LoggerInterface; |
| 36 | use RawAction; |
| 37 | use RevertAction; |
| 38 | use RollbackAction; |
| 39 | use UnwatchAction; |
| 40 | use WatchAction; |
| 41 | use Wikimedia\ObjectFactory\ObjectFactory; |
| 42 | |
| 43 | /** |
| 44 | * @since 1.37 |
| 45 | * @author DannyS712 |
| 46 | */ |
| 47 | class ActionFactory { |
| 48 | |
| 49 | /** |
| 50 | * @var array |
| 51 | * Configured actions (eg those added by extensions to $wgActions) that overrides CORE_ACTIONS |
| 52 | */ |
| 53 | private $actionsConfig; |
| 54 | |
| 55 | private LoggerInterface $logger; |
| 56 | private ObjectFactory $objectFactory; |
| 57 | private HookContainer $hookContainer; |
| 58 | private HookRunner $hookRunner; |
| 59 | |
| 60 | /** |
| 61 | * Core default action specifications |
| 62 | * |
| 63 | * 'foo' => 'ClassName' Load the specified class which subclasses Action |
| 64 | * 'foo' => a callable Load the class returned by the callable |
| 65 | * 'foo' => true Load the class FooAction which subclasses Action |
| 66 | * 'foo' => false The action is disabled; show an error message |
| 67 | * 'foo' => an object Use the specified object, which subclasses Action, useful for tests. |
| 68 | * 'foo' => an array Slowly being used to replace the first three. The array |
| 69 | * is treated as a specification for an ObjectFactory. |
| 70 | */ |
| 71 | private const CORE_ACTIONS = [ |
| 72 | 'delete' => true, |
| 73 | 'edit' => true, |
| 74 | 'history' => true, |
| 75 | 'protect' => true, |
| 76 | 'purge' => true, |
| 77 | 'render' => true, |
| 78 | 'submit' => true, |
| 79 | 'unprotect' => true, |
| 80 | 'view' => true, |
| 81 | |
| 82 | // Beginning of actions switched to using DI with an ObjectFactory spec |
| 83 | 'credits' => [ |
| 84 | 'class' => CreditsAction::class, |
| 85 | 'services' => [ |
| 86 | 'LinkRenderer', |
| 87 | 'UserFactory', |
| 88 | ], |
| 89 | ], |
| 90 | 'info' => [ |
| 91 | 'class' => InfoAction::class, |
| 92 | 'services' => [ |
| 93 | 'ContentLanguage', |
| 94 | 'LanguageNameUtils', |
| 95 | 'LinkBatchFactory', |
| 96 | 'LinkRenderer', |
| 97 | 'DBLoadBalancerFactory', |
| 98 | 'MagicWordFactory', |
| 99 | 'NamespaceInfo', |
| 100 | 'PageProps', |
| 101 | 'RepoGroup', |
| 102 | 'RevisionLookup', |
| 103 | 'MainWANObjectCache', |
| 104 | 'WatchedItemStore', |
| 105 | 'RedirectLookup', |
| 106 | 'RestrictionStore', |
| 107 | 'LinksMigration', |
| 108 | 'UserFactory', |
| 109 | ], |
| 110 | ], |
| 111 | 'markpatrolled' => [ |
| 112 | 'class' => MarkpatrolledAction::class, |
| 113 | 'services' => [ |
| 114 | 'LinkRenderer', |
| 115 | ], |
| 116 | ], |
| 117 | 'mcrundo' => [ |
| 118 | 'class' => McrUndoAction::class, |
| 119 | 'services' => [ |
| 120 | // Same as for McrRestoreAction |
| 121 | 'ReadOnlyMode', |
| 122 | 'RevisionLookup', |
| 123 | 'RevisionRenderer', |
| 124 | 'CommentFormatter', |
| 125 | 'MainConfig', |
| 126 | ], |
| 127 | ], |
| 128 | 'mcrrestore' => [ |
| 129 | 'class' => McrRestoreAction::class, |
| 130 | 'services' => [ |
| 131 | // Same as for McrUndoAction |
| 132 | 'ReadOnlyMode', |
| 133 | 'RevisionLookup', |
| 134 | 'RevisionRenderer', |
| 135 | 'CommentFormatter', |
| 136 | 'MainConfig', |
| 137 | ], |
| 138 | ], |
| 139 | 'raw' => [ |
| 140 | 'class' => RawAction::class, |
| 141 | 'services' => [ |
| 142 | 'Parser', |
| 143 | 'PermissionManager', |
| 144 | 'RevisionLookup', |
| 145 | 'RestrictionStore', |
| 146 | 'UserFactory', |
| 147 | ], |
| 148 | ], |
| 149 | 'revert' => [ |
| 150 | 'class' => RevertAction::class, |
| 151 | 'services' => [ |
| 152 | 'ContentLanguage', |
| 153 | 'RepoGroup', |
| 154 | ], |
| 155 | ], |
| 156 | 'rollback' => [ |
| 157 | 'class' => RollbackAction::class, |
| 158 | 'services' => [ |
| 159 | 'ContentHandlerFactory', |
| 160 | 'RollbackPageFactory', |
| 161 | 'UserOptionsLookup', |
| 162 | 'WatchlistManager', |
| 163 | 'CommentFormatter' |
| 164 | ], |
| 165 | ], |
| 166 | 'unwatch' => [ |
| 167 | 'class' => UnwatchAction::class, |
| 168 | 'services' => [ |
| 169 | 'WatchlistManager', |
| 170 | 'WatchedItemStore', |
| 171 | ], |
| 172 | ], |
| 173 | 'watch' => [ |
| 174 | 'class' => WatchAction::class, |
| 175 | 'services' => [ |
| 176 | 'WatchlistManager', |
| 177 | 'WatchedItemStore', |
| 178 | ], |
| 179 | ], |
| 180 | ]; |
| 181 | |
| 182 | /** |
| 183 | * @param array $actionsConfig Configured actions (eg those added by extensions to $wgActions) |
| 184 | * @param LoggerInterface $logger |
| 185 | * @param ObjectFactory $objectFactory |
| 186 | * @param HookContainer $hookContainer |
| 187 | */ |
| 188 | public function __construct( |
| 189 | array $actionsConfig, |
| 190 | LoggerInterface $logger, |
| 191 | ObjectFactory $objectFactory, |
| 192 | HookContainer $hookContainer |
| 193 | ) { |
| 194 | $this->actionsConfig = $actionsConfig; |
| 195 | $this->logger = $logger; |
| 196 | $this->objectFactory = $objectFactory; |
| 197 | $this->hookContainer = $hookContainer; |
| 198 | $this->hookRunner = new HookRunner( $hookContainer ); |
| 199 | } |
| 200 | |
| 201 | /** |
| 202 | * @param string $actionName should already be in all lowercase |
| 203 | * @return class-string|callable|false|Action|array|null The spec for the action, in any valid form, |
| 204 | * based on $this->actionsConfig, or if not included there, CORE_ACTIONS, or null if the |
| 205 | * action does not exist. |
| 206 | */ |
| 207 | private function getActionSpec( string $actionName ) { |
| 208 | if ( isset( $this->actionsConfig[ $actionName ] ) ) { |
| 209 | $this->logger->debug( |
| 210 | '{actionName} is being set in configuration rather than CORE_ACTIONS', |
| 211 | [ |
| 212 | 'actionName' => $actionName |
| 213 | ] |
| 214 | ); |
| 215 | return $this->actionsConfig[ $actionName ]; |
| 216 | } |
| 217 | return ( self::CORE_ACTIONS[ $actionName ] ?? null ); |
| 218 | } |
| 219 | |
| 220 | /** |
| 221 | * Get an appropriate Action subclass for the given action, |
| 222 | * taking into account Article-specific overrides |
| 223 | * |
| 224 | * @param string $actionName |
| 225 | * @param Article|PageIdentity $article The target on which the action is to be performed. |
| 226 | * @param IContextSource $context |
| 227 | * @return Action|false|null False if the action is disabled, null if not recognized |
| 228 | */ |
| 229 | public function getAction( |
| 230 | string $actionName, |
| 231 | $article, |
| 232 | IContextSource $context |
| 233 | ) { |
| 234 | // Normalize to lowercase |
| 235 | $actionName = strtolower( $actionName ); |
| 236 | |
| 237 | $spec = $this->getActionSpec( $actionName ); |
| 238 | if ( $spec === false ) { |
| 239 | // The action is disabled |
| 240 | return $spec; |
| 241 | } |
| 242 | |
| 243 | if ( $article instanceof PageIdentity ) { |
| 244 | if ( !$article->canExist() ) { |
| 245 | // Encountered a non-proper PageIdentity (e.g. a special page). |
| 246 | // We can't construct an Article object for a SpecialPage, |
| 247 | // so give up here. Actions are only defined for proper pages anyway. |
| 248 | // See T348451. |
| 249 | return null; |
| 250 | } |
| 251 | |
| 252 | $article = Article::newFromTitle( |
| 253 | Title::newFromPageIdentity( $article ), |
| 254 | $context |
| 255 | ); |
| 256 | } |
| 257 | |
| 258 | // Check action overrides even for nonexistent actions, so that actions |
| 259 | // can exist just for a single content type. For Flow's convenience. |
| 260 | $overrides = $article->getActionOverrides(); |
| 261 | if ( isset( $overrides[ $actionName ] ) ) { |
| 262 | // The Article class wants to override the action |
| 263 | $spec = $overrides[ $actionName ]; |
| 264 | $this->logger->debug( |
| 265 | 'Overriding normal handler for {actionName}', |
| 266 | [ 'actionName' => $actionName ] |
| 267 | ); |
| 268 | } |
| 269 | |
| 270 | if ( !$spec ) { |
| 271 | // Either no such action exists (null) or the action is disabled |
| 272 | // based on the article overrides (false) |
| 273 | return $spec; |
| 274 | } |
| 275 | |
| 276 | if ( $spec === true ) { |
| 277 | // Old-style: use Action subclass based on name |
| 278 | $spec = ucfirst( $actionName ) . 'Action'; |
| 279 | } |
| 280 | |
| 281 | // $spec is either a class name, a callable, a specific object to use, or an |
| 282 | // ObjectFactory spec. Convert to ObjectFactory spec, or return the specific object. |
| 283 | if ( is_string( $spec ) ) { |
| 284 | if ( !class_exists( $spec ) ) { |
| 285 | $this->logger->info( |
| 286 | 'Missing action class {actionClass}, treating as disabled', |
| 287 | [ 'actionClass' => $spec ] |
| 288 | ); |
| 289 | return false; |
| 290 | } |
| 291 | // Class exists, can be used by ObjectFactory |
| 292 | $spec = [ 'class' => $spec ]; |
| 293 | } elseif ( is_callable( $spec ) ) { |
| 294 | $spec = [ 'factory' => $spec ]; |
| 295 | } elseif ( !is_array( $spec ) ) { |
| 296 | // $spec is an object to use directly |
| 297 | return $spec; |
| 298 | } |
| 299 | |
| 300 | // ObjectFactory::createObject accepts an array, not just a callable (phan bug) |
| 301 | // @phan-suppress-next-line PhanTypeInvalidCallableArrayKey |
| 302 | $actionObj = $this->objectFactory->createObject( |
| 303 | $spec, |
| 304 | [ |
| 305 | 'extraArgs' => [ $article, $context ], |
| 306 | 'assertClass' => Action::class |
| 307 | ] |
| 308 | ); |
| 309 | $actionObj->setHookContainer( $this->hookContainer ); |
| 310 | return $actionObj; |
| 311 | } |
| 312 | |
| 313 | /** |
| 314 | * Returns an object containing information about the given action, or null if the action is not |
| 315 | * known. Currently, this will also return null if the action is known but disabled. This may |
| 316 | * change in the future. |
| 317 | * |
| 318 | * @note If $target refers to a non-proper page (such as a special page), this method will |
| 319 | * currently return null due to limitations in the way it is implemented (T346036). This |
| 320 | * will also happen when $target is null if the wiki's main page is not a proper page |
| 321 | * (e.g. Special:MyLanguage/Main_Page, see T348451). |
| 322 | * |
| 323 | * @param string $name |
| 324 | * @param Article|PageIdentity|null $target The target on which the action is to be performed, |
| 325 | * if known. This is used to apply page-specific action overrides. |
| 326 | * |
| 327 | * @return ?ActionInfo |
| 328 | * @since 1.41 |
| 329 | */ |
| 330 | public function getActionInfo( string $name, $target = null ): ?ActionInfo { |
| 331 | $context = RequestContext::getMain(); |
| 332 | |
| 333 | if ( !$target ) { |
| 334 | // If no target is given, check if the action is even defined before |
| 335 | // falling back to the main page. If $target is given, we can't |
| 336 | // exit early, since there may be action overrides defined for the page. |
| 337 | $spec = $this->getActionSpec( $name ); |
| 338 | if ( !$spec ) { |
| 339 | return null; |
| 340 | } |
| 341 | |
| 342 | $target = Title::newMainPage(); |
| 343 | } |
| 344 | |
| 345 | // TODO: In the future, this information should be taken directly from the action spec, |
| 346 | // without the need to instantiate an action object. However, action overrides will have |
| 347 | // to be taken into account if a target is given. (T346036) |
| 348 | $actionObj = $this->getAction( $name, $target, $context ); |
| 349 | |
| 350 | // TODO: When we no longer need to instantiate the action in order to determine the info, |
| 351 | // we will be able to return info for disabled actions as well. |
| 352 | if ( !$actionObj ) { |
| 353 | return null; |
| 354 | } |
| 355 | |
| 356 | return new ActionInfo( [ |
| 357 | 'name' => $actionObj->getName(), |
| 358 | 'restriction' => $actionObj->getRestriction(), |
| 359 | 'needsReadRights' => $actionObj->needsReadRights(), |
| 360 | 'requiresWrite' => $actionObj->requiresWrite(), |
| 361 | 'requiresUnblock' => $actionObj->requiresUnblock(), |
| 362 | ] ); |
| 363 | } |
| 364 | |
| 365 | /** |
| 366 | * Get the name of the action that will be executed, not necessarily the one |
| 367 | * passed through the "action" request parameter. Actions disabled in |
| 368 | * $wgActions will be replaced by "nosuchaction". |
| 369 | * |
| 370 | * @param IContextSource $context |
| 371 | * @return string Action name |
| 372 | */ |
| 373 | public function getActionName( IContextSource $context ): string { |
| 374 | // Trying to get a WikiPage for NS_SPECIAL etc. will result |
| 375 | // in WikiPageFactory::newFromTitle throwing "Invalid or virtual namespace -1 given." |
| 376 | // For SpecialPages et al, default to action=view. |
| 377 | if ( !$context->canUseWikiPage() ) { |
| 378 | return 'view'; |
| 379 | } |
| 380 | |
| 381 | $request = $context->getRequest(); |
| 382 | $actionName = $request->getRawVal( 'action' ) ?? 'view'; |
| 383 | |
| 384 | // Normalize to lowercase |
| 385 | $actionName = strtolower( $actionName ); |
| 386 | |
| 387 | // Check for disabled actions |
| 388 | if ( $this->getActionSpec( $actionName ) === false ) { |
| 389 | // We could just set the action to 'nosuchaction' here and proceed, |
| 390 | // but there should never be an action with the name 'nosuchaction' |
| 391 | // and so getAction will return null, and then we would return |
| 392 | // 'nosuchaction' anyway, so lets just return now |
| 393 | return 'nosuchaction'; |
| 394 | } |
| 395 | |
| 396 | if ( $actionName === 'historysubmit' ) { |
| 397 | // Compatibility with old URLs for no-JS form submissions from action=history (T323338, T22966). |
| 398 | // (This is needed to handle diff links; other uses of 'historysubmit' are handled in MediaWiki.php.) |
| 399 | $actionName = 'view'; |
| 400 | } elseif ( $actionName === 'editredlink' ) { |
| 401 | $actionName = 'edit'; |
| 402 | } |
| 403 | |
| 404 | $this->hookRunner->onGetActionName( $context, $actionName ); |
| 405 | |
| 406 | $action = $this->getAction( |
| 407 | $actionName, |
| 408 | $this->getArticle( $context ), |
| 409 | $context |
| 410 | ); |
| 411 | |
| 412 | // Might not be an Action object if the action is not recognized (so $action could |
| 413 | // be null) but should never be false because we already handled disabled actions |
| 414 | // above. |
| 415 | if ( $action instanceof Action ) { |
| 416 | return $action->getName(); |
| 417 | } |
| 418 | |
| 419 | return 'nosuchaction'; |
| 420 | } |
| 421 | |
| 422 | /** |
| 423 | * Protected to allow overriding with a partial mock in unit tests |
| 424 | * |
| 425 | * @codeCoverageIgnore |
| 426 | * |
| 427 | * @param IContextSource $context |
| 428 | * @return Article |
| 429 | */ |
| 430 | protected function getArticle( IContextSource $context ): Article { |
| 431 | return Article::newFromWikiPage( $context->getWikiPage(), $context ); |
| 432 | } |
| 433 | |
| 434 | } |