ade1921eca
As far as I can see this is impossible to be null. The getPageId() method that returns this value is documented to "@return int" only. Introduced in I140f43a. That was the patch that introduced this class. Bug: T174025 Change-Id: Iae4fa5410537504e0dd354b463be3b371e4cad76
567 lines
17 KiB
PHP
567 lines
17 KiB
PHP
<?php
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/**
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* Page revision base class.
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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 CommentStoreComment;
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use Content;
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use InvalidArgumentException;
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use LogicException;
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use MediaWiki\Linker\LinkTarget;
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use MediaWiki\User\UserIdentity;
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use MWException;
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use Title;
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use User;
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use Wikimedia\Assert\Assert;
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/**
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* Page revision base class.
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*
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* RevisionRecords are considered value objects, but they may use callbacks for lazy loading.
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* Note that while the base class has no setters, subclasses may offer a mutable interface.
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*
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* @since 1.31
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* @since 1.32 Renamed from MediaWiki\Storage\RevisionRecord
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*/
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abstract class RevisionRecord {
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// RevisionRecord deletion constants
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const DELETED_TEXT = 1;
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const DELETED_COMMENT = 2;
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const DELETED_USER = 4;
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const DELETED_RESTRICTED = 8;
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const SUPPRESSED_USER = self::DELETED_USER | self::DELETED_RESTRICTED; // convenience
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const SUPPRESSED_ALL = self::DELETED_TEXT | self::DELETED_COMMENT | self::DELETED_USER |
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self::DELETED_RESTRICTED; // convenience
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// Audience options for accessors
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const FOR_PUBLIC = 1;
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const FOR_THIS_USER = 2;
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const RAW = 3;
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/** @var string Wiki ID; false means the current wiki */
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protected $mWiki = false;
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/** @var int|null */
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protected $mId;
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/** @var int */
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protected $mPageId;
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/** @var UserIdentity|null */
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protected $mUser;
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/** @var bool */
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protected $mMinorEdit = false;
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/** @var string|null */
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protected $mTimestamp;
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/** @var int using the DELETED_XXX and SUPPRESSED_XXX flags */
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protected $mDeleted = 0;
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/** @var int|null */
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protected $mSize;
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/** @var string|null */
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protected $mSha1;
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/** @var int|null */
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protected $mParentId;
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/** @var CommentStoreComment|null */
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protected $mComment;
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/** @var Title */
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protected $mTitle; // TODO: we only need the title for permission checks!
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/** @var RevisionSlots */
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protected $mSlots;
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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 Title $title The title of the page this Revision is associated with.
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* @param RevisionSlots $slots The slots of this revision.
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* @param bool|string $wikiId the wiki ID of the site this Revision belongs to,
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* or false for the local site.
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*
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* @throws MWException
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*/
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function __construct( Title $title, RevisionSlots $slots, $wikiId = false ) {
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Assert::parameterType( 'string|boolean', $wikiId, '$wikiId' );
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$this->mTitle = $title;
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$this->mSlots = $slots;
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$this->mWiki = $wikiId;
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// XXX: this is a sensible default, but we may not have a Title object here in the future.
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$this->mPageId = $title->getArticleID();
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}
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/**
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* Implemented to defy serialization.
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*
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* @throws LogicException always
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*/
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public function __sleep() {
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throw new LogicException( __CLASS__ . ' is not serializable.' );
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}
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/**
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* @param RevisionRecord $rec
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*
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* @return bool True if this RevisionRecord is known to have same content as $rec.
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* False if the content is different (or not known to be the same).
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*/
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public function hasSameContent( RevisionRecord $rec ) {
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if ( $rec === $this ) {
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return true;
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}
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if ( $this->getId() !== null && $this->getId() === $rec->getId() ) {
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return true;
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}
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// check size before hash, since size is quicker to compute
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if ( $this->getSize() !== $rec->getSize() ) {
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return false;
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}
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// instead of checking the hash, we could also check the content addresses of all slots.
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if ( $this->getSha1() === $rec->getSha1() ) {
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return true;
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}
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return false;
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}
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/**
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* Returns the Content of the given slot of this revision.
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* Call getSlotNames() to get a list of available slots.
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*
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* Note that for mutable Content objects, each call to this method will return a
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* fresh clone.
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*
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* MCR migration note: this replaces Revision::getContent
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*
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* @param string $role The role name of the desired slot
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* @param int $audience
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* @param User|null $user
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*
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* @throws RevisionAccessException if the slot does not exist or slot data
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* could not be lazy-loaded.
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* @return Content|null The content of the given slot, or null if access is forbidden.
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*/
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public function getContent( $role, $audience = self::FOR_PUBLIC, User $user = null ) {
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// XXX: throwing an exception would be nicer, but would a further
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// departure from the signature of Revision::getContent(), and thus
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// more complex and error prone refactoring.
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if ( !$this->audienceCan( self::DELETED_TEXT, $audience, $user ) ) {
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return null;
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}
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$content = $this->getSlot( $role, $audience, $user )->getContent();
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return $content->copy();
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}
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/**
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* Returns meta-data for the given slot.
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*
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* @param string $role The role name of the desired slot
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* @param int $audience
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* @param User|null $user
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*
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* @throws RevisionAccessException if the slot does not exist or slot data
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* could not be lazy-loaded.
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* @return SlotRecord The slot meta-data. If access to the slot content is forbidden,
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* calling getContent() on the SlotRecord will throw an exception.
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*/
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public function getSlot( $role, $audience = self::FOR_PUBLIC, User $user = null ) {
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$slot = $this->mSlots->getSlot( $role );
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if ( !$this->audienceCan( self::DELETED_TEXT, $audience, $user ) ) {
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return SlotRecord::newWithSuppressedContent( $slot );
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}
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return $slot;
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}
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/**
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* Returns whether the given slot is defined in this revision.
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*
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* @param string $role The role name of the desired slot
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*
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* @return bool
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*/
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public function hasSlot( $role ) {
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return $this->mSlots->hasSlot( $role );
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}
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/**
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* Returns the slot names (roles) of all slots present in this revision.
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* getContent() will succeed only for the names returned by this method.
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*
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* @return string[]
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*/
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public function getSlotRoles() {
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return $this->mSlots->getSlotRoles();
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}
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/**
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* Returns the slots defined for this revision.
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*
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* @return RevisionSlots
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*/
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public function getSlots() {
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return $this->mSlots;
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}
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/**
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* Returns the slots that originate in this revision.
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*
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* Note that this does not include any slots inherited from some earlier revision,
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* even if they are different from the slots in the immediate parent revision.
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* This is the case for rollbacks: slots of a rollback revision are inherited from
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* the rollback target, and are different from the slots in the parent revision,
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* which was rolled back.
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*
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* To find all slots modified by this revision against its immediate parent
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* revision, use RevisionSlotsUpdate::newFromRevisionSlots().
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*
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* @return RevisionSlots
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*/
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public function getOriginalSlots() {
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return new RevisionSlots( $this->mSlots->getOriginalSlots() );
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}
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/**
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* Returns slots inherited from some previous revision.
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*
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* "Inherited" slots are all slots that do not originate in this revision.
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* Note that these slots may still differ from the one in the parent revision.
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* This is the case for rollbacks: slots of a rollback revision are inherited from
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* the rollback target, and are different from the slots in the parent revision,
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* which was rolled back.
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*
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* @return RevisionSlots
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*/
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public function getInheritedSlots() {
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return new RevisionSlots( $this->mSlots->getInheritedSlots() );
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}
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/**
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* Get revision ID. Depending on the concrete subclass, this may return null if
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* the revision ID is not known (e.g. because the revision does not yet exist
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* in the database).
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*
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* MCR migration note: this replaces Revision::getId
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*
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* @return int|null
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*/
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public function getId() {
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return $this->mId;
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}
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/**
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* Get parent revision ID (the original previous page revision).
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* If there is no parent revision, this returns 0.
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* If the parent revision is undefined or unknown, this returns null.
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*
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* @note As of MW 1.31, the database schema allows the parent ID to be
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* NULL to indicate that it is unknown.
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*
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* MCR migration note: this replaces Revision::getParentId
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*
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* @return int|null
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*/
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public function getParentId() {
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return $this->mParentId;
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}
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/**
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* Returns the nominal size of this revision, in bogo-bytes.
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* May be calculated on the fly if not known, which may in the worst
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* case may involve loading all content.
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*
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* MCR migration note: this replaces Revision::getSize
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*
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* @throws RevisionAccessException if the size was unknown and could not be calculated.
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* @return int
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*/
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abstract public function getSize();
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/**
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* Returns the base36 sha1 of this revision. This hash is derived from the
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* hashes of all slots associated with the revision.
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* May be calculated on the fly if not known, which may in the worst
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* case may involve loading all content.
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*
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* MCR migration note: this replaces Revision::getSha1
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*
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* @throws RevisionAccessException if the hash was unknown and could not be calculated.
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* @return string
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*/
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abstract public function getSha1();
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/**
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* Get the page ID. If the page does not yet exist, the page ID is 0.
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*
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* MCR migration note: this replaces Revision::getPage
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*
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* @return int
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*/
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public function getPageId() {
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return $this->mPageId;
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}
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/**
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* Get the ID of the wiki this revision belongs to.
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*
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* @return string|false The wiki's logical name, of false to indicate the local wiki.
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*/
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public function getWikiId() {
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return $this->mWiki;
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}
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/**
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* Returns the title of the page this revision is associated with as a LinkTarget object.
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*
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* MCR migration note: this replaces Revision::getTitle
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*
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* @return LinkTarget
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*/
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public function getPageAsLinkTarget() {
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return $this->mTitle;
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}
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/**
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* Fetch revision's author's user identity, if it's available to the specified audience.
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* If the specified audience does not have access to it, null will be
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* returned. Depending on the concrete subclass, null may also be returned if the user is
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* not yet specified.
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*
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* MCR migration note: this replaces Revision::getUser
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*
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* @param int $audience One of:
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* RevisionRecord::FOR_PUBLIC to be displayed to all users
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* RevisionRecord::FOR_THIS_USER to be displayed to the given user
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* RevisionRecord::RAW get the ID regardless of permissions
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* @param User|null $user User object to check for, only if FOR_THIS_USER is passed
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* to the $audience parameter
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* @return UserIdentity|null
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*/
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public function getUser( $audience = self::FOR_PUBLIC, User $user = null ) {
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if ( !$this->audienceCan( self::DELETED_USER, $audience, $user ) ) {
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return null;
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} else {
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return $this->mUser;
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}
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}
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/**
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* Fetch revision comment, if it's available to the specified audience.
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* If the specified audience does not have access to the comment,
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* this will return null. Depending on the concrete subclass, null may also be returned
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* if the comment is not yet specified.
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*
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* MCR migration note: this replaces Revision::getComment
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*
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* @param int $audience One of:
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* RevisionRecord::FOR_PUBLIC to be displayed to all users
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* RevisionRecord::FOR_THIS_USER to be displayed to the given user
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* RevisionRecord::RAW get the text regardless of permissions
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* @param User|null $user User object to check for, only if FOR_THIS_USER is passed
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* to the $audience parameter
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*
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* @return CommentStoreComment|null
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*/
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public function getComment( $audience = self::FOR_PUBLIC, User $user = null ) {
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if ( !$this->audienceCan( self::DELETED_COMMENT, $audience, $user ) ) {
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return null;
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} else {
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return $this->mComment;
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}
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}
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/**
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* MCR migration note: this replaces Revision::isMinor
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*
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* @return bool
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*/
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public function isMinor() {
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return (bool)$this->mMinorEdit;
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}
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/**
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* MCR migration note: this replaces Revision::isDeleted
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*
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* @param int $field One of DELETED_* bitfield constants
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*
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* @return bool
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*/
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public function isDeleted( $field ) {
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return ( $this->getVisibility() & $field ) == $field;
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}
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/**
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* Get the deletion bitfield of the revision
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*
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* MCR migration note: this replaces Revision::getVisibility
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*
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* @return int
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*/
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public function getVisibility() {
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return (int)$this->mDeleted;
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}
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/**
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* MCR migration note: this replaces Revision::getTimestamp.
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*
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* May return null if the timestamp was not specified.
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*
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* @return string|null
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*/
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public function getTimestamp() {
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return $this->mTimestamp;
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}
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/**
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* Check that the given audience has access to the given field.
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*
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* MCR migration note: this corresponds to Revision::userCan
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*
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* @param int $field One of self::DELETED_TEXT,
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* self::DELETED_COMMENT,
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* self::DELETED_USER
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* @param int $audience One of:
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* RevisionRecord::FOR_PUBLIC to be displayed to all users
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* RevisionRecord::FOR_THIS_USER to be displayed to the given user
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* RevisionRecord::RAW get the text regardless of permissions
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* @param User|null $user User object to check. Required if $audience is FOR_THIS_USER,
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* ignored otherwise.
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*
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* @return bool
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*/
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public function audienceCan( $field, $audience, User $user = null ) {
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if ( $audience == self::FOR_PUBLIC && $this->isDeleted( $field ) ) {
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return false;
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} elseif ( $audience == self::FOR_THIS_USER ) {
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if ( !$user ) {
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throw new InvalidArgumentException(
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'A User object must be given when checking FOR_THIS_USER audience.'
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);
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}
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if ( !$this->userCan( $field, $user ) ) {
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return false;
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}
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}
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return true;
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}
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/**
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* Determine if the current user is allowed to view a particular
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* field of this revision, if it's marked as deleted.
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*
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* MCR migration note: this corresponds to Revision::userCan
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*
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* @param int $field One of self::DELETED_TEXT,
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* self::DELETED_COMMENT,
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* self::DELETED_USER
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* @param User $user User object to check
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* @return bool
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*/
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protected function userCan( $field, User $user ) {
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// TODO: use callback for permission checks, so we don't need to know a Title object!
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return self::userCanBitfield( $this->getVisibility(), $field, $user, $this->mTitle );
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}
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/**
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* Determine if the current user is allowed to view a particular
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* field of this revision, if it's marked as deleted. This is used
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* by various classes to avoid duplication.
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*
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* MCR migration note: this replaces Revision::userCanBitfield
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*
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* @param int $bitfield Current field
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* @param int $field One of self::DELETED_TEXT = File::DELETED_FILE,
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* self::DELETED_COMMENT = File::DELETED_COMMENT,
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* self::DELETED_USER = File::DELETED_USER
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* @param User $user User object to check
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* @param Title|null $title A Title object to check for per-page restrictions on,
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* instead of just plain userrights
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* @return bool
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*/
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public static function userCanBitfield( $bitfield, $field, User $user, Title $title = null ) {
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if ( $bitfield & $field ) { // aspect is deleted
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if ( $bitfield & self::DELETED_RESTRICTED ) {
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$permissions = [ 'suppressrevision', 'viewsuppressed' ];
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} elseif ( $field & self::DELETED_TEXT ) {
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$permissions = [ 'deletedtext' ];
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} else {
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$permissions = [ 'deletedhistory' ];
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}
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$permissionlist = implode( ', ', $permissions );
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if ( $title === null ) {
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wfDebug( "Checking for $permissionlist due to $field match on $bitfield\n" );
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return $user->isAllowedAny( ...$permissions );
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} else {
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$text = $title->getPrefixedText();
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wfDebug( "Checking for $permissionlist on $text due to $field match on $bitfield\n" );
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foreach ( $permissions as $perm ) {
|
|
if ( $title->userCan( $perm, $user ) ) {
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
} else {
|
|
return true;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Returns whether this RevisionRecord is ready for insertion, that is, whether it contains all
|
|
* information needed to save it to the database. This should trivially be true for
|
|
* RevisionRecords loaded from the database.
|
|
*
|
|
* Note that this may return true even if getId() or getPage() return null or 0, since these
|
|
* are generally assigned while the revision is saved to the database, and may not be available
|
|
* before.
|
|
*
|
|
* @return bool
|
|
*/
|
|
public function isReadyForInsertion() {
|
|
// NOTE: don't check getSize() and getSha1(), since that may cause the full content to
|
|
// be loaded in order to calculate the values. Just assume these methods will not return
|
|
// null if mSlots is not empty.
|
|
|
|
// NOTE: getId() and getPageId() may return null before a revision is saved, so don't
|
|
//check them.
|
|
|
|
return $this->getTimestamp() !== null
|
|
&& $this->getComment( self::RAW ) !== null
|
|
&& $this->getUser( self::RAW ) !== null
|
|
&& $this->mSlots->getSlotRoles() !== [];
|
|
}
|
|
|
|
}
|
|
|
|
/**
|
|
* Retain the old class name for backwards compatibility.
|
|
* @deprecated since 1.32
|
|
*/
|
|
class_alias( RevisionRecord::class, 'MediaWiki\Storage\RevisionRecord' );
|