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<?php
/**
* A RevisionRecord representing a revision of a deleted page persisted in the archive table.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
* http://www.gnu.org/copyleft/gpl.html
*
* @file
*/
namespace MediaWiki\Revision;
use MediaWiki\CommentStore\CommentStoreComment;
use MediaWiki\Page\PageIdentity;
use MediaWiki\Page\ProperPageIdentity;
use MediaWiki\Permissions\Authority;
use MediaWiki\User\UserIdentity;
use MediaWiki\Utils\MWTimestamp;
use stdClass;
use Wikimedia\Assert\Assert;
/**
* A RevisionRecord representing a revision of a deleted page persisted in the archive table.
* Most getters on RevisionArchiveRecord will never return null. However, getId() and
* getParentId() may indeed return null if this information was not stored when the archive entry
* was created.
*
* @since 1.31
* @since 1.32 Renamed from MediaWiki\Storage\RevisionArchiveRecord
*/
class RevisionArchiveRecord extends RevisionRecord {
/**
* @var int
*/
protected $mArchiveId;
/**
* @note Avoid calling this constructor directly. Use the appropriate methods
* in RevisionStore instead.
*
* @param PageIdentity $page The page this RevisionRecord is associated with.
* @param UserIdentity $user
* @param CommentStoreComment $comment
* @param stdClass $row An archive table row. Use RevisionStore::getArchiveQueryInfo() to build
* a query that yields the required fields.
* @param RevisionSlots $slots The slots of this revision.
* @param false|string $wikiId Relevant wiki or self::LOCAL for the current one.
*/
public function __construct(
PageIdentity $page,
UserIdentity $user,
CommentStoreComment $comment,
stdClass $row,
RevisionSlots $slots,
$wikiId = self::LOCAL
) {
parent::__construct( $page, $slots, $wikiId );
$timestamp = MWTimestamp::convert( TS_MW, $row->ar_timestamp );
Assert::parameter( is_string( $timestamp ), '$row->rev_timestamp', 'must be a valid timestamp' );
$this->mArchiveId = intval( $row->ar_id );
// NOTE: ar_page_id may be different from $this->mPage->getId() in some cases,
// notably when a partially restored page has been moved, and a new page has been created
// with the same title. Archive rows for that title will then have the wrong page id.
$this->mPageId = isset( $row->ar_page_id ) ? intval( $row->ar_page_id ) : $this->getArticleId( $this->mPage );
// NOTE: ar_parent_id = 0 indicates that there is no parent revision, while null
// indicates that the parent revision is unknown. As per MW 1.31, the database schema
// allows ar_parent_id to be NULL.
$this->mParentId = isset( $row->ar_parent_id ) ? intval( $row->ar_parent_id ) : null;
$this->mId = isset( $row->ar_rev_id ) ? intval( $row->ar_rev_id ) : null;
$this->mComment = $comment;
$this->mUser = $user;
$this->mTimestamp = $timestamp;
$this->mMinorEdit = (bool)$row->ar_minor_edit;
$this->mDeleted = intval( $row->ar_deleted );
$this->mSize = isset( $row->ar_len ) ? intval( $row->ar_len ) : null;
$this->mSha1 = !empty( $row->ar_sha1 ) ? $row->ar_sha1 : null;
Assert::parameter(
$page->canExist(),
'$page',
'must represent a proper page'
);
Assert::postcondition(
parent::getPage() instanceof ProperPageIdentity,
'The parent constructor should have ensured that we have a ProperPageIdentity now.'
);
}
/**
* Returns the page this revision belongs to.
*
* @return ProperPageIdentity (before 1.44, this was returning a PageIdentity)
*/
public function getPage(): ProperPageIdentity {
// Override to narrow the return type.
// We checked in the constructor that the page is a proper page.
// @phan-suppress-next-line PhanTypeMismatchReturnSuperType
return parent::getPage();
}
/**
* Get archive row ID
*
* @return int
*/
public function getArchiveId() {
return $this->mArchiveId;
}
/**
* @param string|false $wikiId The wiki ID expected by the caller.
* @return int|null The revision id, or null if the original revision ID
* was not recorded in the archive table.
*/
public function getId( $wikiId = self::LOCAL ) {
// overwritten just to refine the contract specification.
return parent::getId( $wikiId );
}
/**
* @throws RevisionAccessException if the size was unknown and could not be calculated.
* @return int The nominal revision size, never null. May be computed on the fly.
*/
public function getSize() {
// If length is null, calculate and remember it (potentially SLOW!).
// This is for compatibility with old database rows that don't have the field set.
$this->mSize ??= $this->mSlots->computeSize();
return $this->mSize;
}
/**
* @throws RevisionAccessException if the hash was unknown and could not be calculated.
* @return string The revision hash, never null. May be computed on the fly.
*/
public function getSha1() {
// If hash is null, calculate it and remember (potentially SLOW!)
// This is for compatibility with old database rows that don't have the field set.
$this->mSha1 ??= $this->mSlots->computeSha1();
return $this->mSha1;
}
/**
* @param int $audience
* @param Authority|null $performer
*
* @return UserIdentity The identity of the revision author, null if access is forbidden.
*/
public function getUser( $audience = self::FOR_PUBLIC, ?Authority $performer = null ) {
// overwritten just to add a guarantee to the contract
return parent::getUser( $audience, $performer );
}
/**
* @param int $audience
* @param Authority|null $performer
*
* @return CommentStoreComment The revision comment, null if access is forbidden.
*/
public function getComment( $audience = self::FOR_PUBLIC, ?Authority $performer = null ) {
// overwritten just to add a guarantee to the contract
return parent::getComment( $audience, $performer );
}
/**
* @return string never null
*/
public function getTimestamp() {
// overwritten just to add a guarantee to the contract
return parent::getTimestamp();
}
public function userCan( $field, Authority $performer ) {
// This revision belongs to a deleted page, so check the relevant permissions as well. (T345777)
// Viewing the content requires either 'deletedtext' or 'undelete' (for legacy reasons)
if (
$field === self::DELETED_TEXT &&
!$performer->authorizeRead( 'deletedtext', $this->getPage() ) &&
!$performer->authorizeRead( 'undelete', $this->getPage() )
) {
return false;
}
// Viewing the edit summary requires 'deletedhistory'
if (
$field === self::DELETED_COMMENT &&
!$performer->authorizeRead( 'deletedhistory', $this->getPage() )
) {
return false;
}
// Other fields of revisions of deleted pages are public, per T232389 (unless revision-deleted)
return parent::userCan( $field, $performer );
}
public function audienceCan( $field, $audience, ?Authority $performer = null ) {
// This revision belongs to a deleted page, so check the relevant permissions as well. (T345777)
// See userCan().
if (
$audience == self::FOR_PUBLIC &&
( $field === self::DELETED_TEXT || $field === self::DELETED_COMMENT )
) {
// TODO: Should this use PermissionManager::isEveryoneAllowed() or something?
// But RevisionRecord::audienceCan() doesn't do that either…
return false;
}
// This calls userCan(), which checks the user's permissions
return parent::audienceCan( $field, $audience, $performer );
}
/**
* @see RevisionStore::isComplete
*
* @return bool always true.
*/
public function isReadyForInsertion() {
return true;
}
}