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| 1 | <?php |
| 2 | /** |
| 3 | * A RevisionRecord representing an existing revision persisted in the revision table. |
| 4 | * |
| 5 | * @license GPL-2.0-or-later |
| 6 | * @file |
| 7 | */ |
| 8 | |
| 9 | namespace MediaWiki\Revision; |
| 10 | |
| 11 | use InvalidArgumentException; |
| 12 | use MediaWiki\CommentStore\CommentStoreComment; |
| 13 | use MediaWiki\Page\PageIdentity; |
| 14 | use MediaWiki\Page\ProperPageIdentity; |
| 15 | use MediaWiki\Permissions\Authority; |
| 16 | use MediaWiki\User\UserIdentity; |
| 17 | use MediaWiki\Utils\MWTimestamp; |
| 18 | use Wikimedia\Assert\Assert; |
| 19 | |
| 20 | /** |
| 21 | * A RevisionRecord representing an existing revision persisted in the revision table. |
| 22 | * RevisionStoreRecord has no optional fields, getters will never return null. |
| 23 | * |
| 24 | * @since 1.31 |
| 25 | * @since 1.32 Renamed from MediaWiki\Storage\RevisionStoreRecord |
| 26 | */ |
| 27 | class RevisionStoreRecord extends RevisionRecord { |
| 28 | |
| 29 | /** @var bool */ |
| 30 | protected $mCurrent = false; |
| 31 | |
| 32 | /** |
| 33 | * @note Avoid calling this constructor directly. Use the appropriate methods |
| 34 | * in RevisionStore instead. |
| 35 | * |
| 36 | * @param PageIdentity $page The page this RevisionRecord is associated with. |
| 37 | * @param UserIdentity $user |
| 38 | * @param CommentStoreComment $comment |
| 39 | * @param \stdClass $row A row from the revision table. Use RevisionStore::getQueryInfo() to build |
| 40 | * a query that yields the required fields. |
| 41 | * @param RevisionSlots $slots The slots of this revision. |
| 42 | * @param false|string $wikiId Relevant wiki id or self::LOCAL for the current one. |
| 43 | */ |
| 44 | public function __construct( |
| 45 | PageIdentity $page, |
| 46 | UserIdentity $user, |
| 47 | CommentStoreComment $comment, |
| 48 | \stdClass $row, |
| 49 | RevisionSlots $slots, |
| 50 | $wikiId = self::LOCAL |
| 51 | ) { |
| 52 | parent::__construct( $page, $slots, $wikiId ); |
| 53 | $this->mId = intval( $row->rev_id ); |
| 54 | $this->mPageId = intval( $row->rev_page ); |
| 55 | $this->mComment = $comment; |
| 56 | |
| 57 | Assert::parameter( |
| 58 | $page->exists(), |
| 59 | '$page', |
| 60 | 'must represent an existing page' |
| 61 | ); |
| 62 | Assert::parameter( |
| 63 | $page->getId( $wikiId ) === $this->mPageId, |
| 64 | '$page', |
| 65 | 'must match the rev_page field in $row' |
| 66 | ); |
| 67 | Assert::postcondition( |
| 68 | parent::getPage() instanceof ProperPageIdentity, |
| 69 | 'The parent constructor should have ensured that we have a ProperPageIdentity now.' |
| 70 | ); |
| 71 | |
| 72 | // Don't use MWTimestamp::convert, instead let any detailed exception from MWTimestamp |
| 73 | // bubble up (T254210) |
| 74 | $timestamp = ( new MWTimestamp( $row->rev_timestamp ) )->getTimestamp( TS_MW ); |
| 75 | |
| 76 | $this->mUser = $user; |
| 77 | $this->mMinorEdit = (bool)$row->rev_minor_edit; |
| 78 | $this->mTimestamp = $timestamp; |
| 79 | $this->mDeleted = intval( $row->rev_deleted ); |
| 80 | |
| 81 | // NOTE: rev_parent_id = 0 indicates that there is no parent revision, while null |
| 82 | // indicates that the parent revision is unknown. As per MW 1.31, the database schema |
| 83 | // allows rev_parent_id to be NULL. |
| 84 | $this->mParentId = isset( $row->rev_parent_id ) ? intval( $row->rev_parent_id ) : null; |
| 85 | $this->mSize = isset( $row->rev_len ) ? intval( $row->rev_len ) : null; |
| 86 | |
| 87 | // NOTE: we must not call $this->mTitle->getLatestRevID() here, since the state of |
| 88 | // page_latest may be in limbo during revision creation. In that case, calling |
| 89 | // $this->mTitle->getLatestRevID() would cause a bad value to be cached in the Title |
| 90 | // object. During page creation, that bad value would be 0. |
| 91 | if ( isset( $row->page_latest ) ) { |
| 92 | $this->mCurrent = ( $row->rev_id == $row->page_latest ); |
| 93 | } |
| 94 | |
| 95 | $pageIdBasedOnPage = $this->getArticleId( $this->mPage ); |
| 96 | if ( $this->mPageId && $pageIdBasedOnPage && $this->mPageId !== $pageIdBasedOnPage ) { |
| 97 | throw new InvalidArgumentException( |
| 98 | 'The given page (' . $this->mPage . ')' . |
| 99 | ' does not belong to page ID ' . $this->mPageId . |
| 100 | ' but actually belongs to ' . $this->getArticleId( $this->mPage ) |
| 101 | ); |
| 102 | } |
| 103 | } |
| 104 | |
| 105 | /** |
| 106 | * Returns the page this revision belongs to. |
| 107 | * |
| 108 | * @return ProperPageIdentity (before 1.44, this was returning a PageIdentity) |
| 109 | */ |
| 110 | public function getPage(): ProperPageIdentity { |
| 111 | // Override to narrow the return type. |
| 112 | // We checked in the constructor that the page is a proper page. |
| 113 | // @phan-suppress-next-line PhanTypeMismatchReturnSuperType |
| 114 | return parent::getPage(); |
| 115 | } |
| 116 | |
| 117 | /** |
| 118 | * @inheritDoc |
| 119 | */ |
| 120 | public function isCurrent() { |
| 121 | return $this->mCurrent; |
| 122 | } |
| 123 | |
| 124 | /** |
| 125 | * MCR migration note: this replaced Revision::isDeleted |
| 126 | * |
| 127 | * @param int $field One of DELETED_* bitfield constants |
| 128 | * |
| 129 | * @return bool |
| 130 | */ |
| 131 | public function isDeleted( $field ) { |
| 132 | if ( $this->isCurrent() && $field === self::DELETED_TEXT ) { |
| 133 | // Current revisions of pages cannot have the content hidden. Skipping this |
| 134 | // check is very useful for Parser as it fetches templates using newKnownCurrent(). |
| 135 | // Calling getVisibility() in that case triggers a verification database query. |
| 136 | return false; // no need to check |
| 137 | } |
| 138 | |
| 139 | return parent::isDeleted( $field ); |
| 140 | } |
| 141 | |
| 142 | /** @inheritDoc */ |
| 143 | public function userCan( $field, Authority $performer ) { |
| 144 | if ( $this->isCurrent() && $field === self::DELETED_TEXT ) { |
| 145 | // Current revisions of pages cannot have the content hidden. Skipping this |
| 146 | // check is very useful for Parser as it fetches templates using newKnownCurrent(). |
| 147 | // Calling getVisibility() in that case triggers a verification database query. |
| 148 | return true; // no need to check |
| 149 | } |
| 150 | |
| 151 | return parent::userCan( $field, $performer ); |
| 152 | } |
| 153 | |
| 154 | /** |
| 155 | * @param string|false $wikiId The wiki ID expected by the caller. |
| 156 | * @return int|null The revision id, never null. |
| 157 | */ |
| 158 | public function getId( $wikiId = self::LOCAL ) { |
| 159 | // overwritten just to add a guarantee to the contract |
| 160 | return parent::getId( $wikiId ); |
| 161 | } |
| 162 | |
| 163 | /** |
| 164 | * @throws RevisionAccessException if the size was unknown and could not be calculated. |
| 165 | * @return int The nominal revision size, never null. May be computed on the fly. |
| 166 | */ |
| 167 | public function getSize() { |
| 168 | // If length is null, calculate and remember it (potentially SLOW!). |
| 169 | // This is for compatibility with old database rows that don't have the field set. |
| 170 | $this->mSize ??= $this->mSlots->computeSize(); |
| 171 | |
| 172 | return $this->mSize; |
| 173 | } |
| 174 | |
| 175 | /** |
| 176 | * @throws RevisionAccessException if the hash was unknown and could not be calculated. |
| 177 | * @return string The revision hash, never null. May be computed on the fly. |
| 178 | */ |
| 179 | public function getSha1() { |
| 180 | return $this->mSlots->computeSha1(); |
| 181 | } |
| 182 | |
| 183 | /** |
| 184 | * @param int $audience |
| 185 | * @param Authority|null $performer |
| 186 | * |
| 187 | * @return UserIdentity The identity of the revision author, null if access is forbidden. |
| 188 | */ |
| 189 | public function getUser( $audience = self::FOR_PUBLIC, ?Authority $performer = null ) { |
| 190 | // overwritten just to add a guarantee to the contract |
| 191 | return parent::getUser( $audience, $performer ); |
| 192 | } |
| 193 | |
| 194 | /** |
| 195 | * @param int $audience |
| 196 | * @param Authority|null $performer |
| 197 | * |
| 198 | * @return CommentStoreComment The revision comment, null if access is forbidden. |
| 199 | */ |
| 200 | public function getComment( $audience = self::FOR_PUBLIC, ?Authority $performer = null ) { |
| 201 | // overwritten just to add a guarantee to the contract |
| 202 | return parent::getComment( $audience, $performer ); |
| 203 | } |
| 204 | |
| 205 | /** |
| 206 | * @return string timestamp, never null |
| 207 | */ |
| 208 | public function getTimestamp() { |
| 209 | // overwritten just to add a guarantee to the contract |
| 210 | return parent::getTimestamp(); |
| 211 | } |
| 212 | |
| 213 | /** |
| 214 | * @see RevisionStore::isComplete |
| 215 | * |
| 216 | * @return bool always true. |
| 217 | */ |
| 218 | public function isReadyForInsertion() { |
| 219 | return true; |
| 220 | } |
| 221 | |
| 222 | } |