3 * Representation of a page version.
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License along
16 * with this program; if not, write to the Free Software Foundation, Inc.,
17 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
18 * http://www.gnu.org/copyleft/gpl.html
22 use MediaWiki\Linker\LinkTarget
;
27 class Revision
implements IDBAccessObject
{
35 protected $mOrigUserText;
39 protected $mMinorEdit;
41 protected $mTimestamp;
57 protected $mUnpatrolled;
59 /** @var stdClass|null */
62 /** @var null|Title */
67 protected $mContentModel;
69 protected $mContentFormat;
71 /** @var Content|null|bool */
73 /** @var null|ContentHandler */
74 protected $mContentHandler;
77 protected $mQueryFlags = 0;
78 /** @var bool Used for cached values to reload user text and rev_deleted */
79 protected $mRefreshMutableFields = false;
80 /** @var string Wiki ID; false means the current wiki */
81 protected $mWiki = false;
83 // Revision deletion constants
84 const DELETED_TEXT
= 1;
85 const DELETED_COMMENT
= 2;
86 const DELETED_USER
= 4;
87 const DELETED_RESTRICTED
= 8;
88 const SUPPRESSED_USER
= 12; // convenience
90 // Audience options for accessors
92 const FOR_THIS_USER
= 2;
96 * Load a page revision from a given revision ID number.
97 * Returns null if no such revision can be found.
100 * Revision::READ_LATEST : Select the data from the master
101 * Revision::READ_LOCKING : Select & lock the data from the master
104 * @param int $flags (optional)
105 * @return Revision|null
107 public static function newFromId( $id, $flags = 0 ) {
108 return self
::newFromConds( [ 'rev_id' => intval( $id ) ], $flags );
112 * Load either the current, or a specified, revision
113 * that's attached to a given link target. If not attached
114 * to that link target, will return null.
117 * Revision::READ_LATEST : Select the data from the master
118 * Revision::READ_LOCKING : Select & lock the data from the master
120 * @param LinkTarget $linkTarget
121 * @param int $id (optional)
122 * @param int $flags Bitfield (optional)
123 * @return Revision|null
125 public static function newFromTitle( LinkTarget
$linkTarget, $id = 0, $flags = 0 ) {
127 'page_namespace' => $linkTarget->getNamespace(),
128 'page_title' => $linkTarget->getDBkey()
131 // Use the specified ID
132 $conds['rev_id'] = $id;
133 return self
::newFromConds( $conds, $flags );
135 // Use a join to get the latest revision
136 $conds[] = 'rev_id=page_latest';
137 $db = wfGetDB( ( $flags & self
::READ_LATEST
) ? DB_MASTER
: DB_SLAVE
);
138 return self
::loadFromConds( $db, $conds, $flags );
143 * Load either the current, or a specified, revision
144 * that's attached to a given page ID.
145 * Returns null if no such revision can be found.
148 * Revision::READ_LATEST : Select the data from the master (since 1.20)
149 * Revision::READ_LOCKING : Select & lock the data from the master
152 * @param int $revId (optional)
153 * @param int $flags Bitfield (optional)
154 * @return Revision|null
156 public static function newFromPageId( $pageId, $revId = 0, $flags = 0 ) {
157 $conds = [ 'page_id' => $pageId ];
159 $conds['rev_id'] = $revId;
160 return self
::newFromConds( $conds, $flags );
162 // Use a join to get the latest revision
163 $conds[] = 'rev_id = page_latest';
164 $db = wfGetDB( ( $flags & self
::READ_LATEST
) ? DB_MASTER
: DB_SLAVE
);
165 return self
::loadFromConds( $db, $conds, $flags );
170 * Make a fake revision object from an archive table row. This is queried
171 * for permissions or even inserted (as in Special:Undelete)
172 * @todo FIXME: Should be a subclass for RevisionDelete. [TS]
175 * @param array $overrides
177 * @throws MWException
180 public static function newFromArchiveRow( $row, $overrides = [] ) {
181 global $wgContentHandlerUseDB;
183 $attribs = $overrides +
[
184 'page' => isset( $row->ar_page_id
) ?
$row->ar_page_id
: null,
185 'id' => isset( $row->ar_rev_id
) ?
$row->ar_rev_id
: null,
186 'comment' => $row->ar_comment
,
187 'user' => $row->ar_user
,
188 'user_text' => $row->ar_user_text
,
189 'timestamp' => $row->ar_timestamp
,
190 'minor_edit' => $row->ar_minor_edit
,
191 'text_id' => isset( $row->ar_text_id
) ?
$row->ar_text_id
: null,
192 'deleted' => $row->ar_deleted
,
193 'len' => $row->ar_len
,
194 'sha1' => isset( $row->ar_sha1
) ?
$row->ar_sha1
: null,
195 'content_model' => isset( $row->ar_content_model
) ?
$row->ar_content_model
: null,
196 'content_format' => isset( $row->ar_content_format
) ?
$row->ar_content_format
: null,
199 if ( !$wgContentHandlerUseDB ) {
200 unset( $attribs['content_model'] );
201 unset( $attribs['content_format'] );
204 if ( !isset( $attribs['title'] )
205 && isset( $row->ar_namespace
)
206 && isset( $row->ar_title
)
208 $attribs['title'] = Title
::makeTitle( $row->ar_namespace
, $row->ar_title
);
211 if ( isset( $row->ar_text
) && !$row->ar_text_id
) {
212 // Pre-1.5 ar_text row
213 $attribs['text'] = self
::getRevisionText( $row, 'ar_' );
214 if ( $attribs['text'] === false ) {
215 throw new MWException( 'Unable to load text from archive row (possibly bug 22624)' );
218 return new self( $attribs );
227 public static function newFromRow( $row ) {
228 return new self( $row );
232 * Load a page revision from a given revision ID number.
233 * Returns null if no such revision can be found.
235 * @param IDatabase $db
237 * @return Revision|null
239 public static function loadFromId( $db, $id ) {
240 return self
::loadFromConds( $db, [ 'rev_id' => intval( $id ) ] );
244 * Load either the current, or a specified, revision
245 * that's attached to a given page. If not attached
246 * to that page, will return null.
248 * @param IDatabase $db
251 * @return Revision|null
253 public static function loadFromPageId( $db, $pageid, $id = 0 ) {
254 $conds = [ 'rev_page' => intval( $pageid ), 'page_id' => intval( $pageid ) ];
256 $conds['rev_id'] = intval( $id );
258 $conds[] = 'rev_id=page_latest';
260 return self
::loadFromConds( $db, $conds );
264 * Load either the current, or a specified, revision
265 * that's attached to a given page. If not attached
266 * to that page, will return null.
268 * @param IDatabase $db
269 * @param Title $title
271 * @return Revision|null
273 public static function loadFromTitle( $db, $title, $id = 0 ) {
275 $matchId = intval( $id );
277 $matchId = 'page_latest';
279 return self
::loadFromConds( $db,
282 'page_namespace' => $title->getNamespace(),
283 'page_title' => $title->getDBkey()
289 * Load the revision for the given title with the given timestamp.
290 * WARNING: Timestamps may in some circumstances not be unique,
291 * so this isn't the best key to use.
293 * @param IDatabase $db
294 * @param Title $title
295 * @param string $timestamp
296 * @return Revision|null
298 public static function loadFromTimestamp( $db, $title, $timestamp ) {
299 return self
::loadFromConds( $db,
301 'rev_timestamp' => $db->timestamp( $timestamp ),
302 'page_namespace' => $title->getNamespace(),
303 'page_title' => $title->getDBkey()
309 * Given a set of conditions, fetch a revision
311 * This method is used then a revision ID is qualified and
312 * will incorporate some basic slave/master fallback logic
314 * @param array $conditions
315 * @param int $flags (optional)
316 * @return Revision|null
318 private static function newFromConds( $conditions, $flags = 0 ) {
319 $db = wfGetDB( ( $flags & self
::READ_LATEST
) ? DB_MASTER
: DB_SLAVE
);
321 $rev = self
::loadFromConds( $db, $conditions, $flags );
322 // Make sure new pending/committed revision are visibile later on
323 // within web requests to certain avoid bugs like T93866 and T94407.
325 && !( $flags & self
::READ_LATEST
)
326 && wfGetLB()->getServerCount() > 1
327 && wfGetLB()->hasOrMadeRecentMasterChanges()
329 $flags = self
::READ_LATEST
;
330 $db = wfGetDB( DB_MASTER
);
331 $rev = self
::loadFromConds( $db, $conditions, $flags );
335 $rev->mQueryFlags
= $flags;
342 * Given a set of conditions, fetch a revision from
343 * the given database connection.
345 * @param IDatabase $db
346 * @param array $conditions
347 * @param int $flags (optional)
348 * @return Revision|null
350 private static function loadFromConds( $db, $conditions, $flags = 0 ) {
351 $row = self
::fetchFromConds( $db, $conditions, $flags );
353 $rev = new Revision( $row );
354 $rev->mWiki
= $db->getWikiID();
363 * Return a wrapper for a series of database rows to
364 * fetch all of a given page's revisions in turn.
365 * Each row can be fed to the constructor to get objects.
367 * @param LinkTarget $title
368 * @return ResultWrapper
369 * @deprecated Since 1.28
371 public static function fetchRevision( LinkTarget
$title ) {
372 $row = self
::fetchFromConds(
375 'rev_id=page_latest',
376 'page_namespace' => $title->getNamespace(),
377 'page_title' => $title->getDBkey()
381 return new FakeResultWrapper( $row ?
[ $row ] : [] );
385 * Given a set of conditions, return a ResultWrapper
386 * which will return matching database rows with the
387 * fields necessary to build Revision objects.
389 * @param IDatabase $db
390 * @param array $conditions
391 * @param int $flags (optional)
394 private static function fetchFromConds( $db, $conditions, $flags = 0 ) {
395 $fields = array_merge(
396 self
::selectFields(),
397 self
::selectPageFields(),
398 self
::selectUserFields()
401 if ( ( $flags & self
::READ_LOCKING
) == self
::READ_LOCKING
) {
402 $options[] = 'FOR UPDATE';
404 return $db->selectRow(
405 [ 'revision', 'page', 'user' ],
410 [ 'page' => self
::pageJoinCond(), 'user' => self
::userJoinCond() ]
415 * Return the value of a select() JOIN conds array for the user table.
416 * This will get user table rows for logged-in users.
420 public static function userJoinCond() {
421 return [ 'LEFT JOIN', [ 'rev_user != 0', 'user_id = rev_user' ] ];
425 * Return the value of a select() page conds array for the page table.
426 * This will assure that the revision(s) are not orphaned from live pages.
430 public static function pageJoinCond() {
431 return [ 'INNER JOIN', [ 'page_id = rev_page' ] ];
435 * Return the list of revision fields that should be selected to create
439 public static function selectFields() {
440 global $wgContentHandlerUseDB;
457 if ( $wgContentHandlerUseDB ) {
458 $fields[] = 'rev_content_format';
459 $fields[] = 'rev_content_model';
466 * Return the list of revision fields that should be selected to create
467 * a new revision from an archive row.
470 public static function selectArchiveFields() {
471 global $wgContentHandlerUseDB;
489 if ( $wgContentHandlerUseDB ) {
490 $fields[] = 'ar_content_format';
491 $fields[] = 'ar_content_model';
497 * Return the list of text fields that should be selected to read the
501 public static function selectTextFields() {
509 * Return the list of page fields that should be selected from page table
512 public static function selectPageFields() {
524 * Return the list of user fields that should be selected from user table
527 public static function selectUserFields() {
528 return [ 'user_name' ];
532 * Do a batched query to get the parent revision lengths
533 * @param IDatabase $db
534 * @param array $revIds
537 public static function getParentLengths( $db, array $revIds ) {
540 return $revLens; // empty
542 $res = $db->select( 'revision',
543 [ 'rev_id', 'rev_len' ],
544 [ 'rev_id' => $revIds ],
546 foreach ( $res as $row ) {
547 $revLens[$row->rev_id
] = $row->rev_len
;
555 * @param object|array $row Either a database row or an array
556 * @throws MWException
559 function __construct( $row ) {
560 if ( is_object( $row ) ) {
561 $this->mId
= intval( $row->rev_id
);
562 $this->mPage
= intval( $row->rev_page
);
563 $this->mTextId
= intval( $row->rev_text_id
);
564 $this->mComment
= $row->rev_comment
;
565 $this->mUser
= intval( $row->rev_user
);
566 $this->mMinorEdit
= intval( $row->rev_minor_edit
);
567 $this->mTimestamp
= $row->rev_timestamp
;
568 $this->mDeleted
= intval( $row->rev_deleted
);
570 if ( !isset( $row->rev_parent_id
) ) {
571 $this->mParentId
= null;
573 $this->mParentId
= intval( $row->rev_parent_id
);
576 if ( !isset( $row->rev_len
) ) {
579 $this->mSize
= intval( $row->rev_len
);
582 if ( !isset( $row->rev_sha1
) ) {
585 $this->mSha1
= $row->rev_sha1
;
588 if ( isset( $row->page_latest
) ) {
589 $this->mCurrent
= ( $row->rev_id
== $row->page_latest
);
590 $this->mTitle
= Title
::newFromRow( $row );
592 $this->mCurrent
= false;
593 $this->mTitle
= null;
596 if ( !isset( $row->rev_content_model
) ) {
597 $this->mContentModel
= null; # determine on demand if needed
599 $this->mContentModel
= strval( $row->rev_content_model
);
602 if ( !isset( $row->rev_content_format
) ) {
603 $this->mContentFormat
= null; # determine on demand if needed
605 $this->mContentFormat
= strval( $row->rev_content_format
);
608 // Lazy extraction...
610 if ( isset( $row->old_text
) ) {
611 $this->mTextRow
= $row;
613 // 'text' table row entry will be lazy-loaded
614 $this->mTextRow
= null;
617 // Use user_name for users and rev_user_text for IPs...
618 $this->mUserText
= null; // lazy load if left null
619 if ( $this->mUser
== 0 ) {
620 $this->mUserText
= $row->rev_user_text
; // IP user
621 } elseif ( isset( $row->user_name
) ) {
622 $this->mUserText
= $row->user_name
; // logged-in user
624 $this->mOrigUserText
= $row->rev_user_text
;
625 } elseif ( is_array( $row ) ) {
626 // Build a new revision to be saved...
627 global $wgUser; // ugh
629 # if we have a content object, use it to set the model and type
630 if ( !empty( $row['content'] ) ) {
631 // @todo when is that set? test with external store setup! check out insertOn() [dk]
632 if ( !empty( $row['text_id'] ) ) {
633 throw new MWException( "Text already stored in external store (id {$row['text_id']}), " .
634 "can't serialize content object" );
637 $row['content_model'] = $row['content']->getModel();
638 # note: mContentFormat is initializes later accordingly
639 # note: content is serialized later in this method!
640 # also set text to null?
643 $this->mId
= isset( $row['id'] ) ?
intval( $row['id'] ) : null;
644 $this->mPage
= isset( $row['page'] ) ?
intval( $row['page'] ) : null;
645 $this->mTextId
= isset( $row['text_id'] ) ?
intval( $row['text_id'] ) : null;
646 $this->mUserText
= isset( $row['user_text'] )
647 ?
strval( $row['user_text'] ) : $wgUser->getName();
648 $this->mUser
= isset( $row['user'] ) ?
intval( $row['user'] ) : $wgUser->getId();
649 $this->mMinorEdit
= isset( $row['minor_edit'] ) ?
intval( $row['minor_edit'] ) : 0;
650 $this->mTimestamp
= isset( $row['timestamp'] )
651 ?
strval( $row['timestamp'] ) : wfTimestampNow();
652 $this->mDeleted
= isset( $row['deleted'] ) ?
intval( $row['deleted'] ) : 0;
653 $this->mSize
= isset( $row['len'] ) ?
intval( $row['len'] ) : null;
654 $this->mParentId
= isset( $row['parent_id'] ) ?
intval( $row['parent_id'] ) : null;
655 $this->mSha1
= isset( $row['sha1'] ) ?
strval( $row['sha1'] ) : null;
657 $this->mContentModel
= isset( $row['content_model'] )
658 ?
strval( $row['content_model'] ) : null;
659 $this->mContentFormat
= isset( $row['content_format'] )
660 ?
strval( $row['content_format'] ) : null;
662 // Enforce spacing trimming on supplied text
663 $this->mComment
= isset( $row['comment'] ) ?
trim( strval( $row['comment'] ) ) : null;
664 $this->mText
= isset( $row['text'] ) ?
rtrim( strval( $row['text'] ) ) : null;
665 $this->mTextRow
= null;
667 $this->mTitle
= isset( $row['title'] ) ?
$row['title'] : null;
669 // if we have a Content object, override mText and mContentModel
670 if ( !empty( $row['content'] ) ) {
671 if ( !( $row['content'] instanceof Content
) ) {
672 throw new MWException( '`content` field must contain a Content object.' );
675 $handler = $this->getContentHandler();
676 $this->mContent
= $row['content'];
678 $this->mContentModel
= $this->mContent
->getModel();
679 $this->mContentHandler
= null;
681 $this->mText
= $handler->serializeContent( $row['content'], $this->getContentFormat() );
682 } elseif ( $this->mText
!== null ) {
683 $handler = $this->getContentHandler();
684 $this->mContent
= $handler->unserializeContent( $this->mText
);
687 // If we have a Title object, make sure it is consistent with mPage.
688 if ( $this->mTitle
&& $this->mTitle
->exists() ) {
689 if ( $this->mPage
=== null ) {
690 // if the page ID wasn't known, set it now
691 $this->mPage
= $this->mTitle
->getArticleID();
692 } elseif ( $this->mTitle
->getArticleID() !== $this->mPage
) {
693 // Got different page IDs. This may be legit (e.g. during undeletion),
694 // but it seems worth mentioning it in the log.
695 wfDebug( "Page ID " . $this->mPage
. " mismatches the ID " .
696 $this->mTitle
->getArticleID() . " provided by the Title object." );
700 $this->mCurrent
= false;
702 // If we still have no length, see it we have the text to figure it out
703 if ( !$this->mSize
&& $this->mContent
!== null ) {
704 $this->mSize
= $this->mContent
->getSize();
708 if ( $this->mSha1
=== null ) {
709 $this->mSha1
= $this->mText
=== null ?
null : self
::base36Sha1( $this->mText
);
713 $this->getContentModel();
714 $this->getContentFormat();
716 throw new MWException( 'Revision constructor passed invalid row format.' );
718 $this->mUnpatrolled
= null;
726 public function getId() {
731 * Set the revision ID
733 * This should only be used for proposed revisions that turn out to be null edits
738 public function setId( $id ) {
739 $this->mId
= (int)$id;
743 * Set the user ID/name
745 * This should only be used for proposed revisions that turn out to be null edits
748 * @param integer $id User ID
749 * @param string $name User name
751 public function setUserIdAndName( $id, $name ) {
752 $this->mUser
= (int)$id;
753 $this->mUserText
= $name;
754 $this->mOrigUserText
= $name;
762 public function getTextId() {
763 return $this->mTextId
;
767 * Get parent revision ID (the original previous page revision)
771 public function getParentId() {
772 return $this->mParentId
;
776 * Returns the length of the text in this revision, or null if unknown.
780 public function getSize() {
785 * Returns the base36 sha1 of the text in this revision, or null if unknown.
787 * @return string|null
789 public function getSha1() {
794 * Returns the title of the page associated with this entry or null.
796 * Will do a query, when title is not set and id is given.
800 public function getTitle() {
801 if ( $this->mTitle
!== null ) {
802 return $this->mTitle
;
804 // rev_id is defined as NOT NULL, but this revision may not yet have been inserted.
805 if ( $this->mId
!== null ) {
806 $dbr = wfGetLB( $this->mWiki
)->getConnectionRef( DB_SLAVE
, [], $this->mWiki
);
807 $row = $dbr->selectRow(
808 [ 'page', 'revision' ],
809 self
::selectPageFields(),
810 [ 'page_id=rev_page', 'rev_id' => $this->mId
],
814 // @TODO: better foreign title handling
815 $this->mTitle
= Title
::newFromRow( $row );
819 if ( $this->mWiki
=== false ||
$this->mWiki
=== wfWikiID() ) {
820 // Loading by ID is best, though not possible for foreign titles
821 if ( !$this->mTitle
&& $this->mPage
!== null && $this->mPage
> 0 ) {
822 $this->mTitle
= Title
::newFromID( $this->mPage
);
826 return $this->mTitle
;
830 * Set the title of the revision
832 * @param Title $title
834 public function setTitle( $title ) {
835 $this->mTitle
= $title;
843 public function getPage() {
848 * Fetch revision's user id if it's available to the specified audience.
849 * If the specified audience does not have access to it, zero will be
852 * @param int $audience One of:
853 * Revision::FOR_PUBLIC to be displayed to all users
854 * Revision::FOR_THIS_USER to be displayed to the given user
855 * Revision::RAW get the ID regardless of permissions
856 * @param User $user User object to check for, only if FOR_THIS_USER is passed
857 * to the $audience parameter
860 public function getUser( $audience = self
::FOR_PUBLIC
, User
$user = null ) {
861 if ( $audience == self
::FOR_PUBLIC
&& $this->isDeleted( self
::DELETED_USER
) ) {
863 } elseif ( $audience == self
::FOR_THIS_USER
&& !$this->userCan( self
::DELETED_USER
, $user ) ) {
871 * Fetch revision's user id without regard for the current user's permissions
874 * @deprecated since 1.25, use getUser( Revision::RAW )
876 public function getRawUser() {
877 wfDeprecated( __METHOD__
, '1.25' );
878 return $this->getUser( self
::RAW
);
882 * Fetch revision's username if it's available to the specified audience.
883 * If the specified audience does not have access to the username, an
884 * empty string will be returned.
886 * @param int $audience One of:
887 * Revision::FOR_PUBLIC to be displayed to all users
888 * Revision::FOR_THIS_USER to be displayed to the given user
889 * Revision::RAW get the text regardless of permissions
890 * @param User $user User object to check for, only if FOR_THIS_USER is passed
891 * to the $audience parameter
894 public function getUserText( $audience = self
::FOR_PUBLIC
, User
$user = null ) {
895 $this->loadMutableFields();
897 if ( $audience == self
::FOR_PUBLIC
&& $this->isDeleted( self
::DELETED_USER
) ) {
899 } elseif ( $audience == self
::FOR_THIS_USER
&& !$this->userCan( self
::DELETED_USER
, $user ) ) {
902 if ( $this->mUserText
=== null ) {
903 $this->mUserText
= User
::whoIs( $this->mUser
); // load on demand
904 if ( $this->mUserText
=== false ) {
905 # This shouldn't happen, but it can if the wiki was recovered
906 # via importing revs and there is no user table entry yet.
907 $this->mUserText
= $this->mOrigUserText
;
910 return $this->mUserText
;
915 * Fetch revision's username without regard for view restrictions
918 * @deprecated since 1.25, use getUserText( Revision::RAW )
920 public function getRawUserText() {
921 wfDeprecated( __METHOD__
, '1.25' );
922 return $this->getUserText( self
::RAW
);
926 * Fetch revision comment if it's available to the specified audience.
927 * If the specified audience does not have access to the comment, an
928 * empty string will be returned.
930 * @param int $audience One of:
931 * Revision::FOR_PUBLIC to be displayed to all users
932 * Revision::FOR_THIS_USER to be displayed to the given user
933 * Revision::RAW get the text regardless of permissions
934 * @param User $user User object to check for, only if FOR_THIS_USER is passed
935 * to the $audience parameter
938 function getComment( $audience = self
::FOR_PUBLIC
, User
$user = null ) {
939 if ( $audience == self
::FOR_PUBLIC
&& $this->isDeleted( self
::DELETED_COMMENT
) ) {
941 } elseif ( $audience == self
::FOR_THIS_USER
&& !$this->userCan( self
::DELETED_COMMENT
, $user ) ) {
944 return $this->mComment
;
949 * Fetch revision comment without regard for the current user's permissions
952 * @deprecated since 1.25, use getComment( Revision::RAW )
954 public function getRawComment() {
955 wfDeprecated( __METHOD__
, '1.25' );
956 return $this->getComment( self
::RAW
);
962 public function isMinor() {
963 return (bool)$this->mMinorEdit
;
967 * @return int Rcid of the unpatrolled row, zero if there isn't one
969 public function isUnpatrolled() {
970 if ( $this->mUnpatrolled
!== null ) {
971 return $this->mUnpatrolled
;
973 $rc = $this->getRecentChange();
974 if ( $rc && $rc->getAttribute( 'rc_patrolled' ) == 0 ) {
975 $this->mUnpatrolled
= $rc->getAttribute( 'rc_id' );
977 $this->mUnpatrolled
= 0;
979 return $this->mUnpatrolled
;
983 * Get the RC object belonging to the current revision, if there's one
985 * @param int $flags (optional) $flags include:
986 * Revision::READ_LATEST : Select the data from the master
989 * @return RecentChange|null
991 public function getRecentChange( $flags = 0 ) {
992 $dbr = wfGetDB( DB_SLAVE
);
994 list( $dbType, ) = DBAccessObjectUtils
::getDBOptions( $flags );
996 return RecentChange
::newFromConds(
998 'rc_user_text' => $this->getUserText( Revision
::RAW
),
999 'rc_timestamp' => $dbr->timestamp( $this->getTimestamp() ),
1000 'rc_this_oldid' => $this->getId()
1008 * @param int $field One of DELETED_* bitfield constants
1012 public function isDeleted( $field ) {
1013 if ( $this->isCurrent() && $field === self
::DELETED_TEXT
) {
1014 // Current revisions of pages cannot have the content hidden. Skipping this
1015 // check is very useful for Parser as it fetches templates using newKnownCurrent().
1016 // Calling getVisibility() in that case triggers a verification database query.
1017 return false; // no need to check
1020 return ( $this->getVisibility() & $field ) == $field;
1024 * Get the deletion bitfield of the revision
1028 public function getVisibility() {
1029 $this->loadMutableFields();
1031 return (int)$this->mDeleted
;
1035 * Fetch revision text if it's available to the specified audience.
1036 * If the specified audience does not have the ability to view this
1037 * revision, an empty string will be returned.
1039 * @param int $audience One of:
1040 * Revision::FOR_PUBLIC to be displayed to all users
1041 * Revision::FOR_THIS_USER to be displayed to the given user
1042 * Revision::RAW get the text regardless of permissions
1043 * @param User $user User object to check for, only if FOR_THIS_USER is passed
1044 * to the $audience parameter
1046 * @deprecated since 1.21, use getContent() instead
1047 * @todo Replace usage in core
1050 public function getText( $audience = self
::FOR_PUBLIC
, User
$user = null ) {
1051 ContentHandler
::deprecated( __METHOD__
, '1.21' );
1053 $content = $this->getContent( $audience, $user );
1054 return ContentHandler
::getContentText( $content ); # returns the raw content text, if applicable
1058 * Fetch revision content if it's available to the specified audience.
1059 * If the specified audience does not have the ability to view this
1060 * revision, null will be returned.
1062 * @param int $audience One of:
1063 * Revision::FOR_PUBLIC to be displayed to all users
1064 * Revision::FOR_THIS_USER to be displayed to $wgUser
1065 * Revision::RAW get the text regardless of permissions
1066 * @param User $user User object to check for, only if FOR_THIS_USER is passed
1067 * to the $audience parameter
1069 * @return Content|null
1071 public function getContent( $audience = self
::FOR_PUBLIC
, User
$user = null ) {
1072 if ( $audience == self
::FOR_PUBLIC
&& $this->isDeleted( self
::DELETED_TEXT
) ) {
1074 } elseif ( $audience == self
::FOR_THIS_USER
&& !$this->userCan( self
::DELETED_TEXT
, $user ) ) {
1077 return $this->getContentInternal();
1082 * Fetch original serialized data without regard for view restrictions
1087 public function getSerializedData() {
1088 if ( $this->mText
=== null ) {
1089 $this->mText
= $this->loadText();
1092 return $this->mText
;
1096 * Gets the content object for the revision (or null on failure).
1098 * Note that for mutable Content objects, each call to this method will return a
1102 * @return Content|null The Revision's content, or null on failure.
1104 protected function getContentInternal() {
1105 if ( $this->mContent
=== null ) {
1106 // Revision is immutable. Load on demand:
1107 if ( $this->mText
=== null ) {
1108 $this->mText
= $this->loadText();
1111 if ( $this->mText
!== null && $this->mText
!== false ) {
1112 // Unserialize content
1113 $handler = $this->getContentHandler();
1114 $format = $this->getContentFormat();
1116 $this->mContent
= $handler->unserializeContent( $this->mText
, $format );
1120 // NOTE: copy() will return $this for immutable content objects
1121 return $this->mContent ?
$this->mContent
->copy() : null;
1125 * Returns the content model for this revision.
1127 * If no content model was stored in the database, the default content model for the title is
1128 * used to determine the content model to use. If no title is know, CONTENT_MODEL_WIKITEXT
1129 * is used as a last resort.
1131 * @return string The content model id associated with this revision,
1132 * see the CONTENT_MODEL_XXX constants.
1134 public function getContentModel() {
1135 if ( !$this->mContentModel
) {
1136 $title = $this->getTitle();
1138 $this->mContentModel
= ContentHandler
::getDefaultModelFor( $title );
1140 $this->mContentModel
= CONTENT_MODEL_WIKITEXT
;
1143 assert( !empty( $this->mContentModel
) );
1146 return $this->mContentModel
;
1150 * Returns the content format for this revision.
1152 * If no content format was stored in the database, the default format for this
1153 * revision's content model is returned.
1155 * @return string The content format id associated with this revision,
1156 * see the CONTENT_FORMAT_XXX constants.
1158 public function getContentFormat() {
1159 if ( !$this->mContentFormat
) {
1160 $handler = $this->getContentHandler();
1161 $this->mContentFormat
= $handler->getDefaultFormat();
1163 assert( !empty( $this->mContentFormat
) );
1166 return $this->mContentFormat
;
1170 * Returns the content handler appropriate for this revision's content model.
1172 * @throws MWException
1173 * @return ContentHandler
1175 public function getContentHandler() {
1176 if ( !$this->mContentHandler
) {
1177 $model = $this->getContentModel();
1178 $this->mContentHandler
= ContentHandler
::getForModelID( $model );
1180 $format = $this->getContentFormat();
1182 if ( !$this->mContentHandler
->isSupportedFormat( $format ) ) {
1183 throw new MWException( "Oops, the content format $format is not supported for "
1184 . "this content model, $model" );
1188 return $this->mContentHandler
;
1194 public function getTimestamp() {
1195 return wfTimestamp( TS_MW
, $this->mTimestamp
);
1201 public function isCurrent() {
1202 return $this->mCurrent
;
1206 * Get previous revision for this title
1208 * @return Revision|null
1210 public function getPrevious() {
1211 if ( $this->getTitle() ) {
1212 $prev = $this->getTitle()->getPreviousRevisionID( $this->getId() );
1214 return self
::newFromTitle( $this->getTitle(), $prev );
1221 * Get next revision for this title
1223 * @return Revision|null
1225 public function getNext() {
1226 if ( $this->getTitle() ) {
1227 $next = $this->getTitle()->getNextRevisionID( $this->getId() );
1229 return self
::newFromTitle( $this->getTitle(), $next );
1236 * Get previous revision Id for this page_id
1237 * This is used to populate rev_parent_id on save
1239 * @param IDatabase $db
1242 private function getPreviousRevisionId( $db ) {
1243 if ( $this->mPage
=== null ) {
1246 # Use page_latest if ID is not given
1247 if ( !$this->mId
) {
1248 $prevId = $db->selectField( 'page', 'page_latest',
1249 [ 'page_id' => $this->mPage
],
1252 $prevId = $db->selectField( 'revision', 'rev_id',
1253 [ 'rev_page' => $this->mPage
, 'rev_id < ' . $this->mId
],
1255 [ 'ORDER BY' => 'rev_id DESC' ] );
1257 return intval( $prevId );
1261 * Get revision text associated with an old or archive row
1262 * $row is usually an object from wfFetchRow(), both the flags and the text
1263 * field must be included.
1265 * @param stdClass $row The text data
1266 * @param string $prefix Table prefix (default 'old_')
1267 * @param string|bool $wiki The name of the wiki to load the revision text from
1268 * (same as the the wiki $row was loaded from) or false to indicate the local
1269 * wiki (this is the default). Otherwise, it must be a symbolic wiki database
1270 * identifier as understood by the LoadBalancer class.
1271 * @return string Text the text requested or false on failure
1273 public static function getRevisionText( $row, $prefix = 'old_', $wiki = false ) {
1276 $textField = $prefix . 'text';
1277 $flagsField = $prefix . 'flags';
1279 if ( isset( $row->$flagsField ) ) {
1280 $flags = explode( ',', $row->$flagsField );
1285 if ( isset( $row->$textField ) ) {
1286 $text = $row->$textField;
1291 # Use external methods for external objects, text in table is URL-only then
1292 if ( in_array( 'external', $flags ) ) {
1294 $parts = explode( '://', $url, 2 );
1295 if ( count( $parts ) == 1 ||
$parts[1] == '' ) {
1298 $text = ExternalStore
::fetchFromURL( $url, [ 'wiki' => $wiki ] );
1301 // If the text was fetched without an error, convert it
1302 if ( $text !== false ) {
1303 $text = self
::decompressRevisionText( $text, $flags );
1309 * If $wgCompressRevisions is enabled, we will compress data.
1310 * The input string is modified in place.
1311 * Return value is the flags field: contains 'gzip' if the
1312 * data is compressed, and 'utf-8' if we're saving in UTF-8
1315 * @param mixed $text Reference to a text
1318 public static function compressRevisionText( &$text ) {
1319 global $wgCompressRevisions;
1322 # Revisions not marked this way will be converted
1323 # on load if $wgLegacyCharset is set in the future.
1326 if ( $wgCompressRevisions ) {
1327 if ( function_exists( 'gzdeflate' ) ) {
1328 $deflated = gzdeflate( $text );
1330 if ( $deflated === false ) {
1331 wfLogWarning( __METHOD__
. ': gzdeflate() failed' );
1337 wfDebug( __METHOD__
. " -- no zlib support, not compressing\n" );
1340 return implode( ',', $flags );
1344 * Re-converts revision text according to it's flags.
1346 * @param mixed $text Reference to a text
1347 * @param array $flags Compression flags
1348 * @return string|bool Decompressed text, or false on failure
1350 public static function decompressRevisionText( $text, $flags ) {
1351 if ( in_array( 'gzip', $flags ) ) {
1352 # Deal with optional compression of archived pages.
1353 # This can be done periodically via maintenance/compressOld.php, and
1354 # as pages are saved if $wgCompressRevisions is set.
1355 $text = gzinflate( $text );
1357 if ( $text === false ) {
1358 wfLogWarning( __METHOD__
. ': gzinflate() failed' );
1363 if ( in_array( 'object', $flags ) ) {
1364 # Generic compressed storage
1365 $obj = unserialize( $text );
1366 if ( !is_object( $obj ) ) {
1370 $text = $obj->getText();
1373 global $wgLegacyEncoding;
1374 if ( $text !== false && $wgLegacyEncoding
1375 && !in_array( 'utf-8', $flags ) && !in_array( 'utf8', $flags )
1377 # Old revisions kept around in a legacy encoding?
1378 # Upconvert on demand.
1379 # ("utf8" checked for compatibility with some broken
1380 # conversion scripts 2008-12-30)
1382 $text = $wgContLang->iconv( $wgLegacyEncoding, 'UTF-8', $text );
1389 * Insert a new revision into the database, returning the new revision ID
1390 * number on success and dies horribly on failure.
1392 * @param IDatabase $dbw (master connection)
1393 * @throws MWException
1396 public function insertOn( $dbw ) {
1397 global $wgDefaultExternalStore, $wgContentHandlerUseDB;
1399 // Not allowed to have rev_page equal to 0, false, etc.
1400 if ( !$this->mPage
) {
1401 $title = $this->getTitle();
1402 if ( $title instanceof Title
) {
1403 $titleText = ' for page ' . $title->getPrefixedText();
1407 throw new MWException( "Cannot insert revision$titleText: page ID must be nonzero" );
1410 $this->checkContentModel();
1412 $data = $this->mText
;
1413 $flags = self
::compressRevisionText( $data );
1415 # Write to external storage if required
1416 if ( $wgDefaultExternalStore ) {
1417 // Store and get the URL
1418 $data = ExternalStore
::insertToDefault( $data );
1420 throw new MWException( "Unable to store text to external storage" );
1425 $flags .= 'external';
1428 # Record the text (or external storage URL) to the text table
1429 if ( $this->mTextId
=== null ) {
1430 $old_id = $dbw->nextSequenceValue( 'text_old_id_seq' );
1431 $dbw->insert( 'text',
1433 'old_id' => $old_id,
1434 'old_text' => $data,
1435 'old_flags' => $flags,
1438 $this->mTextId
= $dbw->insertId();
1441 if ( $this->mComment
=== null ) {
1442 $this->mComment
= "";
1445 # Record the edit in revisions
1446 $rev_id = $this->mId
!== null
1448 : $dbw->nextSequenceValue( 'revision_rev_id_seq' );
1450 'rev_id' => $rev_id,
1451 'rev_page' => $this->mPage
,
1452 'rev_text_id' => $this->mTextId
,
1453 'rev_comment' => $this->mComment
,
1454 'rev_minor_edit' => $this->mMinorEdit ?
1 : 0,
1455 'rev_user' => $this->mUser
,
1456 'rev_user_text' => $this->mUserText
,
1457 'rev_timestamp' => $dbw->timestamp( $this->mTimestamp
),
1458 'rev_deleted' => $this->mDeleted
,
1459 'rev_len' => $this->mSize
,
1460 'rev_parent_id' => $this->mParentId
=== null
1461 ?
$this->getPreviousRevisionId( $dbw )
1463 'rev_sha1' => $this->mSha1
=== null
1464 ? Revision
::base36Sha1( $this->mText
)
1468 if ( $wgContentHandlerUseDB ) {
1469 // NOTE: Store null for the default model and format, to save space.
1470 // XXX: Makes the DB sensitive to changed defaults.
1471 // Make this behavior optional? Only in miser mode?
1473 $model = $this->getContentModel();
1474 $format = $this->getContentFormat();
1476 $title = $this->getTitle();
1478 if ( $title === null ) {
1479 throw new MWException( "Insufficient information to determine the title of the "
1480 . "revision's page!" );
1483 $defaultModel = ContentHandler
::getDefaultModelFor( $title );
1484 $defaultFormat = ContentHandler
::getForModelID( $defaultModel )->getDefaultFormat();
1486 $row['rev_content_model'] = ( $model === $defaultModel ) ?
null : $model;
1487 $row['rev_content_format'] = ( $format === $defaultFormat ) ?
null : $format;
1490 $dbw->insert( 'revision', $row, __METHOD__
);
1492 $this->mId
= $rev_id !== null ?
$rev_id : $dbw->insertId();
1494 // Assertion to try to catch T92046
1495 if ( (int)$this->mId
=== 0 ) {
1496 throw new UnexpectedValueException(
1497 'After insert, Revision mId is ' . var_export( $this->mId
, 1 ) . ': ' .
1498 var_export( $row, 1 )
1502 Hooks
::run( 'RevisionInsertComplete', [ &$this, $data, $flags ] );
1507 protected function checkContentModel() {
1508 global $wgContentHandlerUseDB;
1510 // Note: may return null for revisions that have not yet been inserted
1511 $title = $this->getTitle();
1513 $model = $this->getContentModel();
1514 $format = $this->getContentFormat();
1515 $handler = $this->getContentHandler();
1517 if ( !$handler->isSupportedFormat( $format ) ) {
1518 $t = $title->getPrefixedDBkey();
1520 throw new MWException( "Can't use format $format with content model $model on $t" );
1523 if ( !$wgContentHandlerUseDB && $title ) {
1524 // if $wgContentHandlerUseDB is not set,
1525 // all revisions must use the default content model and format.
1527 $defaultModel = ContentHandler
::getDefaultModelFor( $title );
1528 $defaultHandler = ContentHandler
::getForModelID( $defaultModel );
1529 $defaultFormat = $defaultHandler->getDefaultFormat();
1531 if ( $this->getContentModel() != $defaultModel ) {
1532 $t = $title->getPrefixedDBkey();
1534 throw new MWException( "Can't save non-default content model with "
1535 . "\$wgContentHandlerUseDB disabled: model is $model, "
1536 . "default for $t is $defaultModel" );
1539 if ( $this->getContentFormat() != $defaultFormat ) {
1540 $t = $title->getPrefixedDBkey();
1542 throw new MWException( "Can't use non-default content format with "
1543 . "\$wgContentHandlerUseDB disabled: format is $format, "
1544 . "default for $t is $defaultFormat" );
1548 $content = $this->getContent( Revision
::RAW
);
1549 $prefixedDBkey = $title->getPrefixedDBkey();
1550 $revId = $this->mId
;
1553 throw new MWException(
1554 "Content of revision $revId ($prefixedDBkey) could not be loaded for validation!"
1557 if ( !$content->isValid() ) {
1558 throw new MWException(
1559 "Content of revision $revId ($prefixedDBkey) is not valid! Content model is $model"
1565 * Get the base 36 SHA-1 value for a string of text
1566 * @param string $text
1569 public static function base36Sha1( $text ) {
1570 return Wikimedia\base_convert
( sha1( $text ), 16, 36, 31 );
1574 * Lazy-load the revision's text.
1575 * Currently hardcoded to the 'text' table storage engine.
1577 * @return string|bool The revision's text, or false on failure
1579 protected function loadText() {
1580 // Caching may be beneficial for massive use of external storage
1581 global $wgRevisionCacheExpiry;
1582 static $processCache = null;
1584 if ( !$processCache ) {
1585 $processCache = new MapCacheLRU( 10 );
1588 $cache = ObjectCache
::getMainWANInstance();
1589 $textId = $this->getTextId();
1590 $key = wfMemcKey( 'revisiontext', 'textid', $textId );
1592 if ( $wgRevisionCacheExpiry ) {
1593 if ( $processCache->has( $key ) ) {
1594 return $processCache->get( $key );
1596 $text = $cache->get( $key );
1597 if ( is_string( $text ) ) {
1598 $processCache->set( $key, $text );
1603 // If we kept data for lazy extraction, use it now...
1604 if ( $this->mTextRow
!== null ) {
1605 $row = $this->mTextRow
;
1606 $this->mTextRow
= null;
1612 // Text data is immutable; check slaves first.
1613 $dbr = wfGetDB( DB_SLAVE
);
1614 $row = $dbr->selectRow( 'text',
1615 [ 'old_text', 'old_flags' ],
1616 [ 'old_id' => $textId ],
1620 // Fallback to the master in case of slave lag. Also use FOR UPDATE if it was
1621 // used to fetch this revision to avoid missing the row due to REPEATABLE-READ.
1622 $forUpdate = ( $this->mQueryFlags
& self
::READ_LOCKING
== self
::READ_LOCKING
);
1623 if ( !$row && ( $forUpdate ||
wfGetLB()->getServerCount() > 1 ) ) {
1624 $dbw = wfGetDB( DB_MASTER
);
1625 $row = $dbw->selectRow( 'text',
1626 [ 'old_text', 'old_flags' ],
1627 [ 'old_id' => $textId ],
1629 $forUpdate ?
[ 'FOR UPDATE' ] : [] );
1633 wfDebugLog( 'Revision', "No text row with ID '$textId' (revision {$this->getId()})." );
1636 $text = self
::getRevisionText( $row );
1637 if ( $row && $text === false ) {
1638 wfDebugLog( 'Revision', "No blob for text row '$textId' (revision {$this->getId()})." );
1641 # No negative caching -- negative hits on text rows may be due to corrupted slave servers
1642 if ( $wgRevisionCacheExpiry && $text !== false ) {
1643 $processCache->set( $key, $text );
1644 $cache->set( $key, $text, $wgRevisionCacheExpiry );
1651 * Create a new null-revision for insertion into a page's
1652 * history. This will not re-save the text, but simply refer
1653 * to the text from the previous version.
1655 * Such revisions can for instance identify page rename
1656 * operations and other such meta-modifications.
1658 * @param IDatabase $dbw
1659 * @param int $pageId ID number of the page to read from
1660 * @param string $summary Revision's summary
1661 * @param bool $minor Whether the revision should be considered as minor
1662 * @param User|null $user User object to use or null for $wgUser
1663 * @return Revision|null Revision or null on error
1665 public static function newNullRevision( $dbw, $pageId, $summary, $minor, $user = null ) {
1666 global $wgContentHandlerUseDB, $wgContLang;
1668 $fields = [ 'page_latest', 'page_namespace', 'page_title',
1669 'rev_text_id', 'rev_len', 'rev_sha1' ];
1671 if ( $wgContentHandlerUseDB ) {
1672 $fields[] = 'rev_content_model';
1673 $fields[] = 'rev_content_format';
1676 $current = $dbw->selectRow(
1677 [ 'page', 'revision' ],
1680 'page_id' => $pageId,
1681 'page_latest=rev_id',
1684 [ 'FOR UPDATE' ] // T51581
1693 // Truncate for whole multibyte characters
1694 $summary = $wgContLang->truncate( $summary, 255 );
1698 'user_text' => $user->getName(),
1699 'user' => $user->getId(),
1700 'comment' => $summary,
1701 'minor_edit' => $minor,
1702 'text_id' => $current->rev_text_id
,
1703 'parent_id' => $current->page_latest
,
1704 'len' => $current->rev_len
,
1705 'sha1' => $current->rev_sha1
1708 if ( $wgContentHandlerUseDB ) {
1709 $row['content_model'] = $current->rev_content_model
;
1710 $row['content_format'] = $current->rev_content_format
;
1713 $row['title'] = Title
::makeTitle( $current->page_namespace
, $current->page_title
);
1715 $revision = new Revision( $row );
1724 * Determine if the current user is allowed to view a particular
1725 * field of this revision, if it's marked as deleted.
1727 * @param int $field One of self::DELETED_TEXT,
1728 * self::DELETED_COMMENT,
1729 * self::DELETED_USER
1730 * @param User|null $user User object to check, or null to use $wgUser
1733 public function userCan( $field, User
$user = null ) {
1734 return self
::userCanBitfield( $this->getVisibility(), $field, $user );
1738 * Determine if the current user is allowed to view a particular
1739 * field of this revision, if it's marked as deleted. This is used
1740 * by various classes to avoid duplication.
1742 * @param int $bitfield Current field
1743 * @param int $field One of self::DELETED_TEXT = File::DELETED_FILE,
1744 * self::DELETED_COMMENT = File::DELETED_COMMENT,
1745 * self::DELETED_USER = File::DELETED_USER
1746 * @param User|null $user User object to check, or null to use $wgUser
1747 * @param Title|null $title A Title object to check for per-page restrictions on,
1748 * instead of just plain userrights
1751 public static function userCanBitfield( $bitfield, $field, User
$user = null,
1754 if ( $bitfield & $field ) { // aspect is deleted
1755 if ( $user === null ) {
1759 if ( $bitfield & self
::DELETED_RESTRICTED
) {
1760 $permissions = [ 'suppressrevision', 'viewsuppressed' ];
1761 } elseif ( $field & self
::DELETED_TEXT
) {
1762 $permissions = [ 'deletedtext' ];
1764 $permissions = [ 'deletedhistory' ];
1766 $permissionlist = implode( ', ', $permissions );
1767 if ( $title === null ) {
1768 wfDebug( "Checking for $permissionlist due to $field match on $bitfield\n" );
1769 return call_user_func_array( [ $user, 'isAllowedAny' ], $permissions );
1771 $text = $title->getPrefixedText();
1772 wfDebug( "Checking for $permissionlist on $text due to $field match on $bitfield\n" );
1773 foreach ( $permissions as $perm ) {
1774 if ( $title->userCan( $perm, $user ) ) {
1786 * Get rev_timestamp from rev_id, without loading the rest of the row
1788 * @param Title $title
1790 * @return string|bool False if not found
1792 static function getTimestampFromId( $title, $id, $flags = 0 ) {
1793 $db = ( $flags & self
::READ_LATEST
)
1794 ?
wfGetDB( DB_MASTER
)
1795 : wfGetDB( DB_SLAVE
);
1796 // Casting fix for databases that can't take '' for rev_id
1800 $conds = [ 'rev_id' => $id ];
1801 $conds['rev_page'] = $title->getArticleID();
1802 $timestamp = $db->selectField( 'revision', 'rev_timestamp', $conds, __METHOD__
);
1804 return ( $timestamp !== false ) ?
wfTimestamp( TS_MW
, $timestamp ) : false;
1808 * Get count of revisions per page...not very efficient
1810 * @param IDatabase $db
1811 * @param int $id Page id
1814 static function countByPageId( $db, $id ) {
1815 $row = $db->selectRow( 'revision', [ 'revCount' => 'COUNT(*)' ],
1816 [ 'rev_page' => $id ], __METHOD__
);
1818 return $row->revCount
;
1824 * Get count of revisions per page...not very efficient
1826 * @param IDatabase $db
1827 * @param Title $title
1830 static function countByTitle( $db, $title ) {
1831 $id = $title->getArticleID();
1833 return self
::countByPageId( $db, $id );
1839 * Check if no edits were made by other users since
1840 * the time a user started editing the page. Limit to
1841 * 50 revisions for the sake of performance.
1844 * @deprecated since 1.24
1846 * @param IDatabase|int $db The Database to perform the check on. May be given as a
1847 * Database object or a database identifier usable with wfGetDB.
1848 * @param int $pageId The ID of the page in question
1849 * @param int $userId The ID of the user in question
1850 * @param string $since Look at edits since this time
1852 * @return bool True if the given user was the only one to edit since the given timestamp
1854 public static function userWasLastToEdit( $db, $pageId, $userId, $since ) {
1859 if ( is_int( $db ) ) {
1860 $db = wfGetDB( $db );
1863 $res = $db->select( 'revision',
1866 'rev_page' => $pageId,
1867 'rev_timestamp > ' . $db->addQuotes( $db->timestamp( $since ) )
1870 [ 'ORDER BY' => 'rev_timestamp ASC', 'LIMIT' => 50 ] );
1871 foreach ( $res as $row ) {
1872 if ( $row->rev_user
!= $userId ) {
1880 * Load a revision based on a known page ID and current revision ID from the DB
1882 * This method allows for the use of caching, though accessing anything that normally
1883 * requires permission checks (aside from the text) will trigger a small DB lookup.
1884 * The title will also be lazy loaded, though setTitle() can be used to preload it.
1886 * @param IDatabase $db
1887 * @param int $pageId Page ID
1888 * @param int $revId Known current revision of this page
1889 * @return Revision|bool Returns false if missing
1892 public static function newKnownCurrent( IDatabase
$db, $pageId, $revId ) {
1893 $cache = ObjectCache
::getMainWANInstance();
1894 return $cache->getWithSetCallback(
1895 // Page/rev IDs passed in from DB to reflect history merges
1896 $cache->makeGlobalKey( 'revision', $db->getWikiID(), $pageId, $revId ),
1898 function ( $curValue, &$ttl, array &$setOpts ) use ( $db, $pageId, $revId ) {
1899 $setOpts +
= Database
::getCacheSetOptions( $db );
1901 $rev = Revision
::loadFromPageId( $db, $pageId, $revId );
1902 // Reflect revision deletion and user renames
1904 $rev->mTitle
= null; // mutable; lazy-load
1905 $rev->mRefreshMutableFields
= true;
1908 return $rev ?
: false; // don't cache negatives
1914 * For cached revisions, make sure the user name and rev_deleted is up-to-date
1916 private function loadMutableFields() {
1917 if ( !$this->mRefreshMutableFields
) {
1918 return; // not needed
1921 $this->mRefreshMutableFields
= false;
1922 $dbr = wfGetLB( $this->mWiki
)->getConnectionRef( DB_SLAVE
, [], $this->mWiki
);
1923 $row = $dbr->selectRow(
1924 [ 'revision', 'user' ],
1925 [ 'rev_deleted', 'user_name' ],
1926 [ 'rev_id' => $this->mId
, 'user_id = rev_user' ],
1929 if ( $row ) { // update values
1930 $this->mDeleted
= (int)$row->rev_deleted
;
1931 $this->mUserText
= $row->user_name
;