e662614f95
Implicitly marking parameter $... as nullable is deprecated in php8.4, the explicit nullable type must be used instead Created with autofix from Ide15839e98a6229c22584d1c1c88c690982e1d7a Break one long line in SpecialPage.php Bug: T376276 Change-Id: I807257b2ba1ab2744ab74d9572c9c3d3ac2a968e
121 lines
3.7 KiB
PHP
121 lines
3.7 KiB
PHP
<?php
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/**
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* A RevisionStoreRecord loaded from the cache.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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* http://www.gnu.org/copyleft/gpl.html
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*
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* @file
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*/
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namespace MediaWiki\Revision;
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use MediaWiki\CommentStore\CommentStoreComment;
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use MediaWiki\Page\PageIdentity;
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use MediaWiki\Permissions\Authority;
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use MediaWiki\User\UserIdentity;
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/**
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* A cached RevisionStoreRecord. Ensures that changes performed "behind the back"
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* of the cache do not cause the revision record to deliver stale data.
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*
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* @internal
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* @since 1.33
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*/
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class RevisionStoreCacheRecord extends RevisionStoreRecord {
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/**
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* @var null|callable ( int $revId ): [ int $rev_deleted, UserIdentity $user ]
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*/
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private $mCallback;
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/**
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* @note Avoid calling this constructor directly. Use the appropriate methods
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* in RevisionStore instead.
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*
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* @param callable $callback Callback for loading data.
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* Signature: function ( int $revId ): [ int $rev_deleted, UserIdentity $user ]
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* @param PageIdentity $page The page this RevisionRecord is associated with.
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* @param UserIdentity $user
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* @param CommentStoreComment $comment
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* @param \stdClass $row A row from the revision table. Use RevisionStore::getQueryInfo() to build
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* a query that yields the required fields.
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* @param RevisionSlots $slots The slots of this revision.
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* @param false|string $wikiID Relevant wiki id or self::LOCAL for the current one.
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*/
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public function __construct(
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callable $callback,
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PageIdentity $page,
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UserIdentity $user,
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CommentStoreComment $comment,
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$row,
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RevisionSlots $slots,
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$wikiID = self::LOCAL
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) {
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parent::__construct( $page, $user, $comment, $row, $slots, $wikiID );
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$this->mCallback = $callback;
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}
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/**
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* Overridden to ensure that we return a fresh value and not a cached one.
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*
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* @return int
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*/
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public function getVisibility() {
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if ( $this->mCallback ) {
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$this->loadFreshRow();
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}
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return parent::getVisibility();
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}
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/**
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* Overridden to ensure that we return a fresh value and not a cached one.
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*
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* @param int $audience
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* @param Authority|null $performer
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*
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* @return UserIdentity The identity of the revision author, null if access is forbidden.
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*/
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public function getUser( $audience = self::FOR_PUBLIC, ?Authority $performer = null ) {
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if ( $this->mCallback ) {
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$this->loadFreshRow();
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}
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return parent::getUser( $audience, $performer );
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}
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/**
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* Load a fresh row from the database to ensure we return updated information
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*
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* @throws RevisionAccessException if the row could not be loaded
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*/
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private function loadFreshRow() {
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[ $freshRevDeleted, $freshUser ] = call_user_func( $this->mCallback, $this->mId );
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// Set to null to ensure we do not make unnecessary queries for subsequent getter calls,
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// and to allow the closure to be freed.
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$this->mCallback = null;
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if ( $freshRevDeleted !== null && $freshUser !== null ) {
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$this->mDeleted = intval( $freshRevDeleted );
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$this->mUser = $freshUser;
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} else {
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throw new RevisionAccessException(
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'Unable to load fresh row for rev_id: {rev_id}',
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[ 'rev_id' => $this->mId ]
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);
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}
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}
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}
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