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| 1 | <?php |
| 2 | |
| 3 | use MediaWiki\Content\IContentHandlerFactory; |
| 4 | use MediaWiki\Context\DerivativeContext; |
| 5 | use MediaWiki\Context\IContextSource; |
| 6 | use MediaWiki\Context\RequestContext; |
| 7 | use MediaWiki\HookContainer\HookContainer; |
| 8 | use MediaWiki\HookContainer\HookRunner; |
| 9 | use MediaWiki\Page\PageIdentity; |
| 10 | use MediaWiki\Permissions\Authority; |
| 11 | use MediaWiki\Permissions\PermissionStatus; |
| 12 | use MediaWiki\Revision\RevisionLookup; |
| 13 | use MediaWiki\Revision\SlotRecord; |
| 14 | use MediaWiki\Status\Status; |
| 15 | use MediaWiki\User\UserFactory; |
| 16 | |
| 17 | /** |
| 18 | * Backend logic for changing the content model of a page. |
| 19 | * |
| 20 | * Note that you can create a new page directly with a desired content |
| 21 | * model and format, e.g. via EditPage or externally from ApiEditPage. |
| 22 | * |
| 23 | * @since 1.35 |
| 24 | * @author DannyS712 |
| 25 | */ |
| 26 | class ContentModelChange { |
| 27 | /** @var IContentHandlerFactory */ |
| 28 | private $contentHandlerFactory; |
| 29 | /** @var HookRunner */ |
| 30 | private $hookRunner; |
| 31 | /** @var RevisionLookup */ |
| 32 | private $revLookup; |
| 33 | /** @var UserFactory */ |
| 34 | private $userFactory; |
| 35 | /** @var Authority making the change */ |
| 36 | private $performer; |
| 37 | /** @var WikiPage */ |
| 38 | private $page; |
| 39 | /** @var string */ |
| 40 | private $newModel; |
| 41 | /** @var string[] tags to add */ |
| 42 | private $tags; |
| 43 | /** @var Content */ |
| 44 | private $newContent; |
| 45 | /** @var int|false latest revision id, or false if creating */ |
| 46 | private $latestRevId; |
| 47 | /** @var string 'new' or 'change' */ |
| 48 | private $logAction; |
| 49 | /** @var string 'apierror-' or empty string, for status messages */ |
| 50 | private $msgPrefix; |
| 51 | |
| 52 | /** |
| 53 | * @internal Create via the ContentModelChangeFactory service. |
| 54 | * @param IContentHandlerFactory $contentHandlerFactory |
| 55 | * @param HookContainer $hookContainer |
| 56 | * @param RevisionLookup $revLookup |
| 57 | * @param UserFactory $userFactory |
| 58 | * @param Authority $performer |
| 59 | * @param WikiPage $page |
| 60 | * @param string $newModel |
| 61 | */ |
| 62 | public function __construct( |
| 63 | IContentHandlerFactory $contentHandlerFactory, |
| 64 | HookContainer $hookContainer, |
| 65 | RevisionLookup $revLookup, |
| 66 | UserFactory $userFactory, |
| 67 | Authority $performer, |
| 68 | WikiPage $page, |
| 69 | string $newModel |
| 70 | ) { |
| 71 | $this->contentHandlerFactory = $contentHandlerFactory; |
| 72 | $this->hookRunner = new HookRunner( $hookContainer ); |
| 73 | $this->revLookup = $revLookup; |
| 74 | $this->userFactory = $userFactory; |
| 75 | |
| 76 | $this->performer = $performer; |
| 77 | $this->page = $page; |
| 78 | $this->newModel = $newModel; |
| 79 | |
| 80 | // SpecialChangeContentModel doesn't support tags |
| 81 | // api can specify tags via ::setTags, which also checks if user can add |
| 82 | // the tags specified |
| 83 | $this->tags = []; |
| 84 | |
| 85 | // Requires createNewContent to be called first |
| 86 | $this->logAction = ''; |
| 87 | |
| 88 | // Defaults to nothing, for special page |
| 89 | $this->msgPrefix = ''; |
| 90 | } |
| 91 | |
| 92 | /** |
| 93 | * @param string $msgPrefix |
| 94 | */ |
| 95 | public function setMessagePrefix( $msgPrefix ) { |
| 96 | $this->msgPrefix = $msgPrefix; |
| 97 | } |
| 98 | |
| 99 | /** |
| 100 | * @param callable $authorizer ( string $action, PageIdentity $target, PermissionStatus $status ) |
| 101 | * @return PermissionStatus |
| 102 | */ |
| 103 | private function authorizeInternal( callable $authorizer ): PermissionStatus { |
| 104 | $current = $this->page->getTitle(); |
| 105 | $titleWithNewContentModel = clone $current; |
| 106 | $titleWithNewContentModel->setContentModel( $this->newModel ); |
| 107 | |
| 108 | $status = PermissionStatus::newEmpty(); |
| 109 | $authorizer( 'editcontentmodel', $current, $status ); |
| 110 | $authorizer( 'edit', $current, $status ); |
| 111 | $authorizer( 'editcontentmodel', $titleWithNewContentModel, $status ); |
| 112 | $authorizer( 'edit', $titleWithNewContentModel, $status ); |
| 113 | return $status; |
| 114 | } |
| 115 | |
| 116 | /** |
| 117 | * Check whether $performer can execute the content model change. |
| 118 | * |
| 119 | * @note this method does not guarantee full permissions check, so it should |
| 120 | * only be used to to decide whether to show a content model change form. |
| 121 | * To authorize the content model change action use {@link self::authorizeChange} instead. |
| 122 | * |
| 123 | * @return PermissionStatus |
| 124 | */ |
| 125 | public function probablyCanChange(): PermissionStatus { |
| 126 | return $this->authorizeInternal( |
| 127 | function ( string $action, PageIdentity $target, PermissionStatus $status ) { |
| 128 | return $this->performer->probablyCan( $action, $target, $status ); |
| 129 | } |
| 130 | ); |
| 131 | } |
| 132 | |
| 133 | /** |
| 134 | * Authorize the content model change by $performer. |
| 135 | * |
| 136 | * @note this method should be used right before the actual content model change is performed. |
| 137 | * To check whether a current performer has the potential to change the content model of the page, |
| 138 | * use {@link self::probablyCanChange} instead. |
| 139 | * |
| 140 | * @return PermissionStatus |
| 141 | */ |
| 142 | public function authorizeChange(): PermissionStatus { |
| 143 | return $this->authorizeInternal( |
| 144 | function ( string $action, PageIdentity $target, PermissionStatus $status ) { |
| 145 | return $this->performer->authorizeWrite( $action, $target, $status ); |
| 146 | } |
| 147 | ); |
| 148 | } |
| 149 | |
| 150 | /** |
| 151 | * Check user can edit and editcontentmodel before and after |
| 152 | * |
| 153 | * @deprecated since 1.36. Use ::probablyCanChange or ::authorizeChange instead. |
| 154 | * @return array from wfMergeErrorArrays |
| 155 | */ |
| 156 | public function checkPermissions() { |
| 157 | wfDeprecated( __METHOD__, '1.36' ); |
| 158 | $status = $this->authorizeInternal( |
| 159 | function ( string $action, PageIdentity $target, PermissionStatus $status ) { |
| 160 | return $this->performer->definitelyCan( $action, $target, $status ); |
| 161 | } ); |
| 162 | return $status->toLegacyErrorArray(); |
| 163 | } |
| 164 | |
| 165 | /** |
| 166 | * Specify the tags the user wants to add, and check permissions |
| 167 | * |
| 168 | * @param string[] $tags |
| 169 | * @return Status |
| 170 | */ |
| 171 | public function setTags( $tags ) { |
| 172 | $tagStatus = ChangeTags::canAddTagsAccompanyingChange( $tags, $this->performer ); |
| 173 | if ( $tagStatus->isOK() ) { |
| 174 | $this->tags = $tags; |
| 175 | return Status::newGood(); |
| 176 | } else { |
| 177 | return $tagStatus; |
| 178 | } |
| 179 | } |
| 180 | |
| 181 | /** |
| 182 | * @return Status |
| 183 | */ |
| 184 | private function createNewContent() { |
| 185 | $contentHandlerFactory = $this->contentHandlerFactory; |
| 186 | |
| 187 | $title = $this->page->getTitle(); |
| 188 | $latestRevRecord = $this->revLookup->getRevisionByTitle( $title ); |
| 189 | |
| 190 | if ( $latestRevRecord ) { |
| 191 | $latestContent = $latestRevRecord->getContent( SlotRecord::MAIN ); |
| 192 | $latestHandler = $latestContent->getContentHandler(); |
| 193 | $latestModel = $latestContent->getModel(); |
| 194 | if ( !$latestHandler->supportsDirectEditing() ) { |
| 195 | // Only reachable via api |
| 196 | return Status::newFatal( |
| 197 | 'apierror-changecontentmodel-nodirectediting', |
| 198 | ContentHandler::getLocalizedName( $latestModel ) |
| 199 | ); |
| 200 | } |
| 201 | |
| 202 | $newModel = $this->newModel; |
| 203 | if ( $newModel === $latestModel ) { |
| 204 | // Only reachable via api |
| 205 | return Status::newFatal( 'apierror-nochanges' ); |
| 206 | } |
| 207 | $newHandler = $contentHandlerFactory->getContentHandler( $newModel ); |
| 208 | if ( !$newHandler->canBeUsedOn( $title ) ) { |
| 209 | // Only reachable via api |
| 210 | return Status::newFatal( |
| 211 | 'apierror-changecontentmodel-cannotbeused', |
| 212 | ContentHandler::getLocalizedName( $newModel ), |
| 213 | Message::plaintextParam( $title->getPrefixedText() ) |
| 214 | ); |
| 215 | } |
| 216 | |
| 217 | try { |
| 218 | $newContent = $newHandler->unserializeContent( |
| 219 | $latestContent->serialize() |
| 220 | ); |
| 221 | } catch ( MWException $e ) { |
| 222 | // Messages: changecontentmodel-cannot-convert, |
| 223 | // apierror-changecontentmodel-cannot-convert |
| 224 | return Status::newFatal( |
| 225 | $this->msgPrefix . 'changecontentmodel-cannot-convert', |
| 226 | Message::plaintextParam( $title->getPrefixedText() ), |
| 227 | ContentHandler::getLocalizedName( $newModel ) |
| 228 | ); |
| 229 | } |
| 230 | $this->latestRevId = $latestRevRecord->getId(); |
| 231 | $this->logAction = 'change'; |
| 232 | } else { |
| 233 | // Page doesn't exist, create an empty content object |
| 234 | $newContent = $contentHandlerFactory |
| 235 | ->getContentHandler( $this->newModel ) |
| 236 | ->makeEmptyContent(); |
| 237 | $this->latestRevId = false; |
| 238 | $this->logAction = 'new'; |
| 239 | } |
| 240 | $this->newContent = $newContent; |
| 241 | return Status::newGood(); |
| 242 | } |
| 243 | |
| 244 | /** |
| 245 | * Handle change and logging after validation |
| 246 | * |
| 247 | * Can still be intercepted by hooks |
| 248 | * |
| 249 | * @param IContextSource $context |
| 250 | * @param string $comment |
| 251 | * @param bool $bot Mark as a bot edit if the user can |
| 252 | * @return Status |
| 253 | */ |
| 254 | public function doContentModelChange( |
| 255 | IContextSource $context, |
| 256 | string $comment, |
| 257 | $bot |
| 258 | ) { |
| 259 | $status = $this->createNewContent(); |
| 260 | if ( !$status->isGood() ) { |
| 261 | return $status; |
| 262 | } |
| 263 | |
| 264 | $page = $this->page; |
| 265 | $title = $page->getTitle(); |
| 266 | $user = $this->userFactory->newFromAuthority( $this->performer ); |
| 267 | |
| 268 | // Create log entry |
| 269 | $log = new ManualLogEntry( 'contentmodel', $this->logAction ); |
| 270 | $log->setPerformer( $this->performer->getUser() ); |
| 271 | $log->setTarget( $title ); |
| 272 | $log->setComment( $comment ); |
| 273 | $log->setParameters( [ |
| 274 | '4::oldmodel' => $title->getContentModel(), |
| 275 | '5::newmodel' => $this->newModel |
| 276 | ] ); |
| 277 | $log->addTags( $this->tags ); |
| 278 | |
| 279 | $formatter = LogFormatter::newFromEntry( $log ); |
| 280 | $formatter->setContext( RequestContext::newExtraneousContext( $title ) ); |
| 281 | $reason = $formatter->getPlainActionText(); |
| 282 | |
| 283 | if ( $comment !== '' ) { |
| 284 | $reason .= wfMessage( 'colon-separator' )->inContentLanguage()->text() . $comment; |
| 285 | } |
| 286 | |
| 287 | // Run edit filters |
| 288 | $derivativeContext = new DerivativeContext( $context ); |
| 289 | $derivativeContext->setTitle( $title ); |
| 290 | $derivativeContext->setWikiPage( $page ); |
| 291 | $status = new Status(); |
| 292 | |
| 293 | $newContent = $this->newContent; |
| 294 | |
| 295 | if ( !$this->hookRunner->onEditFilterMergedContent( $derivativeContext, $newContent, |
| 296 | $status, $reason, $user, false ) |
| 297 | ) { |
| 298 | if ( $status->isGood() ) { |
| 299 | // TODO: extensions should really specify an error message |
| 300 | $status->fatal( 'hookaborted' ); |
| 301 | } |
| 302 | return $status; |
| 303 | } |
| 304 | if ( !$status->isOK() ) { |
| 305 | if ( !$status->getErrors() ) { |
| 306 | $status->fatal( 'hookaborted' ); |
| 307 | } |
| 308 | return $status; |
| 309 | } |
| 310 | |
| 311 | // Make the edit |
| 312 | $flags = $this->latestRevId ? EDIT_UPDATE : EDIT_NEW; |
| 313 | $flags |= EDIT_INTERNAL; |
| 314 | if ( $bot && $this->performer->isAllowed( 'bot' ) ) { |
| 315 | $flags |= EDIT_FORCE_BOT; |
| 316 | } |
| 317 | |
| 318 | $status = $page->doUserEditContent( |
| 319 | $newContent, |
| 320 | $this->performer, |
| 321 | $reason, |
| 322 | $flags, |
| 323 | $this->latestRevId, |
| 324 | $this->tags |
| 325 | ); |
| 326 | |
| 327 | if ( !$status->isOK() ) { |
| 328 | return $status; |
| 329 | } |
| 330 | |
| 331 | $logid = $log->insert(); |
| 332 | $log->publish( $logid ); |
| 333 | |
| 334 | $values = [ |
| 335 | 'logid' => $logid |
| 336 | ]; |
| 337 | |
| 338 | return Status::newGood( $values ); |
| 339 | } |
| 340 | |
| 341 | } |