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| 1 | <?php |
| 2 | |
| 3 | namespace Flow\Model; |
| 4 | |
| 5 | use Flow\Collection\PostCollection; |
| 6 | use Flow\Container; |
| 7 | use Flow\Exception\DataModelException; |
| 8 | use Flow\Exception\FlowException; |
| 9 | use Flow\Repository\TreeRepository; |
| 10 | use MediaWiki\Title\Title; |
| 11 | use MediaWiki\User\User; |
| 12 | |
| 13 | class PostRevision extends AbstractRevision { |
| 14 | public const MAX_TOPIC_LENGTH = 260; |
| 15 | |
| 16 | /** |
| 17 | * @var UUID |
| 18 | */ |
| 19 | protected $postId; |
| 20 | |
| 21 | // The rest of the properties are denormalized data that |
| 22 | // must not change between revisions of same post |
| 23 | |
| 24 | /** |
| 25 | * @var UserTuple |
| 26 | */ |
| 27 | protected $origUser; |
| 28 | |
| 29 | /** |
| 30 | * @var UUID|null |
| 31 | */ |
| 32 | protected $replyToId; |
| 33 | |
| 34 | /** |
| 35 | * @var PostRevision[]|null Optionally loaded list of children for this post. |
| 36 | */ |
| 37 | protected $children; |
| 38 | |
| 39 | /** |
| 40 | * @var int|null Optionally loaded distance of this post from the |
| 41 | * root of this post tree. |
| 42 | */ |
| 43 | protected $depth; |
| 44 | |
| 45 | /** |
| 46 | * @var PostRevision|null Optionally loaded root of this posts tree. |
| 47 | * This is always a topic title. |
| 48 | */ |
| 49 | protected $rootPost; |
| 50 | |
| 51 | /** |
| 52 | * Create a brand new root post for a brand new topic. Creating replies to |
| 53 | * an existing post(incl topic root) should use self::reply. |
| 54 | * |
| 55 | * @param Workflow $topic |
| 56 | * @param User $user |
| 57 | * @param string $content The title of the topic (they are Collection as well), in |
| 58 | * topic-title-wikitext format. |
| 59 | * @return PostRevision |
| 60 | */ |
| 61 | public static function createTopicPost( Workflow $topic, User $user, $content ) { |
| 62 | $format = 'topic-title-wikitext'; |
| 63 | $obj = static::newFromId( $topic->getId(), $user, $content, $format, $topic->getArticleTitle() ); |
| 64 | |
| 65 | $obj->changeType = 'new-post'; |
| 66 | // A newly created post has no children, a depth of 0, and |
| 67 | // is the root of its tree. |
| 68 | $obj->setChildren( [] ); |
| 69 | $obj->setDepth( 0 ); |
| 70 | $obj->rootPost = $obj; |
| 71 | |
| 72 | return $obj; |
| 73 | } |
| 74 | |
| 75 | /** |
| 76 | * DO NOT USE THIS METHOD! |
| 77 | * |
| 78 | * Seriously, you probably don't want to use this method, except from within |
| 79 | * this class. |
| 80 | * |
| 81 | * Although it may seem similar to Title::newFrom* or User::newFrom*, chances are slim to none |
| 82 | * that this will do what you'd expect. |
| 83 | * |
| 84 | * Unlike Title & User etc, a post is not something some object that can be |
| 85 | * used in isolation: a post should always be retrieved via it's parents, |
| 86 | * via a workflow, ... |
| 87 | * |
| 88 | * The only reasons we have this method are for creating root posts |
| 89 | * (called from PostRevision->create). |
| 90 | * |
| 91 | * @param UUID $uuid |
| 92 | * @param User $user |
| 93 | * @param string $content |
| 94 | * @param string $format wikitext|html |
| 95 | * @param Title|null $title |
| 96 | * @return PostRevision |
| 97 | */ |
| 98 | public static function newFromId( UUID $uuid, User $user, $content, $format, ?Title $title = null ) { |
| 99 | $obj = new self; |
| 100 | $obj->revId = UUID::create(); |
| 101 | $obj->postId = $uuid; |
| 102 | |
| 103 | $obj->user = UserTuple::newFromUser( $user ); |
| 104 | $obj->origUser = $obj->user; |
| 105 | |
| 106 | $obj->setReplyToId( null ); // not a reply to anything |
| 107 | $obj->prevRevision = null; // no parent revision |
| 108 | $obj->setContent( $content, $format, $title ); |
| 109 | |
| 110 | return $obj; |
| 111 | } |
| 112 | |
| 113 | /** |
| 114 | * @param string[] $row |
| 115 | * @param PostRevision|null $obj |
| 116 | * @return PostRevision |
| 117 | * @throws DataModelException |
| 118 | */ |
| 119 | public static function fromStorageRow( array $row, $obj = null ) { |
| 120 | /** @var PostRevision $obj */ |
| 121 | $obj = parent::fromStorageRow( $row, $obj ); |
| 122 | '@phan-var PostRevision $obj'; |
| 123 | $treeRevId = UUID::create( $row['tree_rev_id'] ); |
| 124 | |
| 125 | if ( !$obj->revId->equals( $treeRevId ) ) { |
| 126 | $treeRevIdStr = ( $treeRevId !== null ) |
| 127 | ? $treeRevId->getAlphadecimal() |
| 128 | : var_export( $row['tree_rev_id'], true ); |
| 129 | |
| 130 | throw new DataModelException( |
| 131 | 'tree revision doesn\'t match provided revision: treeRevId (' |
| 132 | . $treeRevIdStr . ') != obj->revId (' . $obj->revId->getAlphadecimal() . ')', |
| 133 | 'process-data' |
| 134 | ); |
| 135 | } |
| 136 | $obj->replyToId = $row['tree_parent_id'] ? UUID::create( $row['tree_parent_id'] ) : null; |
| 137 | $obj->postId = UUID::create( $row['rev_type_id'] ); |
| 138 | $obj->origUser = UserTuple::newFromArray( $row, 'tree_orig_user_' ); |
| 139 | if ( !$obj->origUser ) { |
| 140 | throw new DataModelException( 'Could not create UserTuple for tree_orig_user_' ); |
| 141 | } |
| 142 | return $obj; |
| 143 | } |
| 144 | |
| 145 | /** |
| 146 | * @param PostRevision $rev |
| 147 | * @return string[] |
| 148 | * @suppress PhanParamSignatureMismatch It doesn't match |
| 149 | */ |
| 150 | public static function toStorageRow( $rev ) { |
| 151 | return parent::toStorageRow( $rev ) + [ |
| 152 | 'tree_parent_id' => $rev->replyToId ? $rev->replyToId->getAlphadecimal() : null, |
| 153 | 'tree_rev_descendant_id' => $rev->postId->getAlphadecimal(), |
| 154 | 'tree_rev_id' => $rev->revId->getAlphadecimal(), |
| 155 | // rest of tree_ is denormalized data about first post revision |
| 156 | 'tree_orig_user_id' => $rev->origUser->id, |
| 157 | 'tree_orig_user_ip' => $rev->origUser->ip, |
| 158 | 'tree_orig_user_wiki' => $rev->origUser->wiki, |
| 159 | ]; |
| 160 | } |
| 161 | |
| 162 | /** |
| 163 | * @param Workflow $workflow |
| 164 | * @param User $user |
| 165 | * @param string $content |
| 166 | * @param string $format wikitext|html |
| 167 | * @param string $changeType |
| 168 | * @return PostRevision |
| 169 | */ |
| 170 | public function reply( Workflow $workflow, User $user, $content, $format, $changeType = 'reply' ) { |
| 171 | $reply = new self; |
| 172 | |
| 173 | // UUIDs should not be reused for different entities/entity types in the future. |
| 174 | // (It is also inconsistent with newFromId, which uses separate ones.) |
| 175 | // This may be changed here in the future. |
| 176 | $reply->revId = $reply->postId = UUID::create(); |
| 177 | |
| 178 | $reply->user = UserTuple::newFromUser( $user ); |
| 179 | $reply->origUser = $reply->user; |
| 180 | $reply->replyToId = $this->postId; |
| 181 | $reply->setContent( $content, $format, $workflow->getArticleTitle() ); |
| 182 | $reply->changeType = $changeType; |
| 183 | $reply->setChildren( [] ); |
| 184 | $reply->setDepth( $this->getDepth() + 1 ); |
| 185 | $reply->rootPost = $this->rootPost; |
| 186 | |
| 187 | return $reply; |
| 188 | } |
| 189 | |
| 190 | /** |
| 191 | * @return UUID |
| 192 | */ |
| 193 | public function getPostId() { |
| 194 | return $this->postId; |
| 195 | } |
| 196 | |
| 197 | /** |
| 198 | * @return UserTuple |
| 199 | */ |
| 200 | public function getCreatorTuple() { |
| 201 | return $this->origUser; |
| 202 | } |
| 203 | |
| 204 | /** |
| 205 | * @return bool |
| 206 | */ |
| 207 | public function isTopicTitle() { |
| 208 | return $this->replyToId === null; |
| 209 | } |
| 210 | |
| 211 | public function getContentFormat() { |
| 212 | // The canonical format must always be topic-title-wikitext, because we |
| 213 | // can not convert 'topic-title-html' to 'topic-title-wikitext'. |
| 214 | if ( $this->isTopicTitle() ) { |
| 215 | return 'topic-title-wikitext'; |
| 216 | } else { |
| 217 | return parent::getContentFormat(); |
| 218 | } |
| 219 | } |
| 220 | |
| 221 | /** |
| 222 | * Gets the desired storage format. |
| 223 | * |
| 224 | * @return string |
| 225 | */ |
| 226 | protected function getStorageFormat() { |
| 227 | if ( $this->isTopicTitle() ) { |
| 228 | return 'topic-title-wikitext'; |
| 229 | } else { |
| 230 | return parent::getStorageFormat(); |
| 231 | } |
| 232 | } |
| 233 | |
| 234 | /** |
| 235 | * Gets the appropriate wikitext format string for this revision. |
| 236 | * |
| 237 | * @return string 'wikitext' or 'topic-title-wikitext' |
| 238 | */ |
| 239 | public function getWikitextFormat() { |
| 240 | if ( $this->isTopicTitle() ) { |
| 241 | return 'topic-title-wikitext'; |
| 242 | } else { |
| 243 | return parent::getWikitextFormat(); |
| 244 | } |
| 245 | } |
| 246 | |
| 247 | /** |
| 248 | * Gets the appropriate HTML format string for this revision. |
| 249 | * |
| 250 | * @return string 'html' or 'topic-title-html' |
| 251 | */ |
| 252 | public function getHtmlFormat() { |
| 253 | if ( $this->isTopicTitle() ) { |
| 254 | return 'topic-title-html'; |
| 255 | } else { |
| 256 | return parent::getHtmlFormat(); |
| 257 | } |
| 258 | } |
| 259 | |
| 260 | /** |
| 261 | * @param UUID|null $id |
| 262 | */ |
| 263 | public function setReplyToId( ?UUID $id = null ) { |
| 264 | $this->replyToId = $id; |
| 265 | } |
| 266 | |
| 267 | /** |
| 268 | * @return UUID|null Id of the parent post, or null if this is the root |
| 269 | */ |
| 270 | public function getReplyToId() { |
| 271 | return $this->replyToId; |
| 272 | } |
| 273 | |
| 274 | /** |
| 275 | * @param PostRevision[] $children |
| 276 | */ |
| 277 | public function setChildren( array $children ) { |
| 278 | $this->children = $children; |
| 279 | if ( $this->rootPost ) { |
| 280 | // Propagate root post into children. |
| 281 | $this->setRootPost( $this->rootPost ); |
| 282 | } |
| 283 | } |
| 284 | |
| 285 | /** |
| 286 | * @return PostRevision[] |
| 287 | * @throws DataModelException |
| 288 | */ |
| 289 | public function getChildren() { |
| 290 | if ( $this->children === null ) { |
| 291 | throw new DataModelException( 'Children not loaded for post: ' . $this->postId->getAlphadecimal(), 'process-data' ); |
| 292 | } |
| 293 | return $this->children; |
| 294 | } |
| 295 | |
| 296 | /** |
| 297 | * @param int $depth |
| 298 | */ |
| 299 | public function setDepth( $depth ) { |
| 300 | $this->depth = (int)$depth; |
| 301 | } |
| 302 | |
| 303 | /** |
| 304 | * @return int |
| 305 | * @throws DataModelException |
| 306 | */ |
| 307 | public function getDepth() { |
| 308 | if ( $this->depth === null ) { |
| 309 | /** @var TreeRepository $treeRepo */ |
| 310 | $treeRepo = Container::get( 'repository.tree' ); |
| 311 | $rootPath = $treeRepo->findRootPath( $this->getCollectionId() ); |
| 312 | $this->setDepth( count( $rootPath ) - 1 ); |
| 313 | } |
| 314 | |
| 315 | return $this->depth; |
| 316 | } |
| 317 | |
| 318 | /** |
| 319 | * @param PostRevision $root |
| 320 | * @deprecated Use PostCollection::getRoot instead |
| 321 | */ |
| 322 | public function setRootPost( PostRevision $root ) { |
| 323 | $this->rootPost = $root; |
| 324 | if ( $this->children ) { |
| 325 | // Propagate root post into children. |
| 326 | foreach ( $this->children as $child ) { |
| 327 | $child->setRootPost( $root ); |
| 328 | } |
| 329 | } |
| 330 | } |
| 331 | |
| 332 | /** |
| 333 | * @return PostRevision |
| 334 | * @throws DataModelException |
| 335 | * @deprecated Use PostCollection::getRoot instead |
| 336 | */ |
| 337 | public function getRootPost() { |
| 338 | if ( $this->isTopicTitle() ) { |
| 339 | return $this; |
| 340 | } elseif ( $this->rootPost === null ) { |
| 341 | $collection = $this->getCollection(); |
| 342 | $root = $collection->getRoot(); |
| 343 | // @phan-suppress-next-line PhanTypeMismatchReturnSuperType |
| 344 | return $root->getLastRevision(); |
| 345 | } |
| 346 | return $this->rootPost; |
| 347 | } |
| 348 | |
| 349 | /** |
| 350 | * Get the amount of posts in this topic. |
| 351 | * |
| 352 | * @return int |
| 353 | */ |
| 354 | public function getChildCount() { |
| 355 | return count( $this->getChildren() ); |
| 356 | } |
| 357 | |
| 358 | /** |
| 359 | * Finds the provided postId within this posts descendants |
| 360 | * |
| 361 | * @param UUID $postId The id of the post to find. |
| 362 | * @return PostRevision|null |
| 363 | * @throws FlowException |
| 364 | */ |
| 365 | public function getDescendant( UUID $postId ) { |
| 366 | if ( $this->children === null ) { |
| 367 | throw new FlowException( 'Attempted to access post descendant, but children haven\'t yet been loaded.' ); |
| 368 | } |
| 369 | foreach ( $this->children as $child ) { |
| 370 | if ( $child->getPostId()->equals( $postId ) ) { |
| 371 | return $child; |
| 372 | } |
| 373 | $found = $child->getDescendant( $postId ); |
| 374 | if ( $found !== null ) { |
| 375 | return $found; |
| 376 | } |
| 377 | } |
| 378 | |
| 379 | return null; |
| 380 | } |
| 381 | |
| 382 | /** |
| 383 | * @return string |
| 384 | */ |
| 385 | public function getRevisionType() { |
| 386 | return 'post'; |
| 387 | } |
| 388 | |
| 389 | /** |
| 390 | * @param User $user |
| 391 | * @return bool |
| 392 | */ |
| 393 | public function isCreator( User $user ) { |
| 394 | if ( !$user->isRegistered() ) { |
| 395 | return false; |
| 396 | } |
| 397 | return $user->getId() == $this->getCreatorId(); |
| 398 | } |
| 399 | |
| 400 | /** |
| 401 | * @return UUID |
| 402 | */ |
| 403 | public function getCollectionId() { |
| 404 | return $this->getPostId(); |
| 405 | } |
| 406 | |
| 407 | /** |
| 408 | * @return PostCollection |
| 409 | */ |
| 410 | public function getCollection() { |
| 411 | // @phan-suppress-next-line PhanTypeMismatchReturnSuperType |
| 412 | return PostCollection::newFromRevision( $this ); |
| 413 | } |
| 414 | } |