7 const DELETED_TEXT
= 1;
8 const DELETED_COMMENT
= 2;
9 const DELETED_USER
= 4;
10 const DELETED_RESTRICTED
= 8;
12 const SUPPRESSED_USER
= 12;
13 // Audience options for Revision::getText()
15 const FOR_THIS_USER
= 2;
19 * Load a page revision from a given revision ID number.
20 * Returns null if no such revision can be found.
23 * @return Revision or null
25 public static function newFromId( $id ) {
26 return Revision
::newFromConds(
27 array( 'page_id=rev_page',
28 'rev_id' => intval( $id ) ) );
32 * Load either the current, or a specified, revision
33 * that's attached to a given title. If not attached
34 * to that title, will return null.
37 * @param $id Integer (optional)
38 * @return Revision or null
40 public static function newFromTitle( $title, $id = 0 ) {
42 'page_namespace' => $title->getNamespace(),
43 'page_title' => $title->getDBkey()
46 // Use the specified ID
47 $conds['rev_id'] = $id;
48 } elseif ( wfGetLB()->getServerCount() > 1 ) {
49 // Get the latest revision ID from the master
50 $dbw = wfGetDB( DB_MASTER
);
51 $latest = $dbw->selectField( 'page', 'page_latest', $conds, __METHOD__
);
52 if ( $latest === false ) {
53 return null; // page does not exist
55 $conds['rev_id'] = $latest;
57 // Use a join to get the latest revision
58 $conds[] = 'rev_id=page_latest';
60 $conds[] = 'page_id=rev_page';
61 return Revision
::newFromConds( $conds );
65 * Load either the current, or a specified, revision
66 * that's attached to a given page ID.
67 * Returns null if no such revision can be found.
69 * @param $revId Integer
70 * @param $pageId Integer (optional)
71 * @return Revision or null
73 public static function newFromPageId( $pageId, $revId = 0 ) {
74 $conds = array( 'page_id' => $pageId );
76 $conds['rev_id'] = $revId;
77 } elseif ( wfGetLB()->getServerCount() > 1 ) {
78 // Get the latest revision ID from the master
79 $dbw = wfGetDB( DB_MASTER
);
80 $latest = $dbw->selectField( 'page', 'page_latest', $conds, __METHOD__
);
81 if ( $latest === false ) {
82 return null; // page does not exist
84 $conds['rev_id'] = $latest;
86 $conds[] = 'rev_id = page_latest';
88 $conds[] = 'page_id=rev_page';
89 return Revision
::newFromConds( $conds );
93 * Make a fake revision object from an archive table row. This is queried
94 * for permissions or even inserted (as in Special:Undelete)
95 * @todo FIXME: Should be a subclass for RevisionDelete. [TS]
98 * @param $overrides array
102 public static function newFromArchiveRow( $row, $overrides = array() ) {
103 $attribs = $overrides +
array(
104 'page' => isset( $row->ar_page_id
) ?
$row->ar_page_id
: null,
105 'id' => isset( $row->ar_rev_id
) ?
$row->ar_rev_id
: null,
106 'comment' => $row->ar_comment
,
107 'user' => $row->ar_user
,
108 'user_text' => $row->ar_user_text
,
109 'timestamp' => $row->ar_timestamp
,
110 'minor_edit' => $row->ar_minor_edit
,
111 'text_id' => isset( $row->ar_text_id
) ?
$row->ar_text_id
: null,
112 'deleted' => $row->ar_deleted
,
113 'len' => $row->ar_len
);
114 if ( isset( $row->ar_text
) && !$row->ar_text_id
) {
115 // Pre-1.5 ar_text row
116 $attribs['text'] = self
::getRevisionText( $row, 'ar_' );
117 if ( $attribs['text'] === false ) {
118 throw new MWException( 'Unable to load text from archive row (possibly bug 22624)' );
121 return new self( $attribs );
130 public static function newFromRow( $row ) {
131 return new self( $row );
135 * Load a page revision from a given revision ID number.
136 * Returns null if no such revision can be found.
138 * @param $db DatabaseBase
140 * @return Revision or null
142 public static function loadFromId( $db, $id ) {
143 return Revision
::loadFromConds( $db,
144 array( 'page_id=rev_page',
145 'rev_id' => intval( $id ) ) );
149 * Load either the current, or a specified, revision
150 * that's attached to a given page. If not attached
151 * to that page, will return null.
153 * @param $db DatabaseBase
154 * @param $pageid Integer
156 * @return Revision or null
158 public static function loadFromPageId( $db, $pageid, $id = 0 ) {
159 $conds = array( 'page_id=rev_page','rev_page' => intval( $pageid ), 'page_id'=>intval( $pageid ) );
161 $conds['rev_id'] = intval( $id );
163 $conds[] = 'rev_id=page_latest';
165 return Revision
::loadFromConds( $db, $conds );
169 * Stores the origin wiki of a revision in case it is a foreign wiki
171 function setWikiID( $wikiID ) {
172 $this->mWikiID
= $wikiID;
176 * Load the current revision of a given page of a foreign wiki.
177 * The WikiID is stored for further use, such as loadText() and getTimestampFromId()
179 public static function loadFromTitleForeignWiki( $wikiID, $title ) {
180 $dbr = wfGetDB( DB_SLAVE
, array(), $wikiID );
182 $revision = self
::loadFromTitle( $dbr, $title );
185 $revision->setWikiID( $wikiID );
193 * Load either the current, or a specified, revision
194 * that's attached to a given page. If not attached
195 * to that page, will return null.
197 * @param $db DatabaseBase
198 * @param $title Title
200 * @return Revision or null
202 public static function loadFromTitle( $db, $title, $id = 0 ) {
204 $matchId = intval( $id );
206 $matchId = 'page_latest';
208 return Revision
::loadFromConds(
210 array( "rev_id=$matchId",
212 'page_namespace' => $title->getNamespace(),
213 'page_title' => $title->getDBkey() ) );
217 * Load the revision for the given title with the given timestamp.
218 * WARNING: Timestamps may in some circumstances not be unique,
219 * so this isn't the best key to use.
221 * @param $db DatabaseBase
222 * @param $title Title
223 * @param $timestamp String
224 * @return Revision or null
226 public static function loadFromTimestamp( $db, $title, $timestamp ) {
227 return Revision
::loadFromConds(
229 array( 'rev_timestamp' => $db->timestamp( $timestamp ),
231 'page_namespace' => $title->getNamespace(),
232 'page_title' => $title->getDBkey() ) );
236 * Given a set of conditions, fetch a revision.
238 * @param $conditions Array
239 * @return Revision or null
241 public static function newFromConds( $conditions ) {
242 $db = wfGetDB( DB_SLAVE
);
243 $row = Revision
::loadFromConds( $db, $conditions );
244 if( is_null( $row ) && wfGetLB()->getServerCount() > 1 ) {
245 $dbw = wfGetDB( DB_MASTER
);
246 $row = Revision
::loadFromConds( $dbw, $conditions );
252 * Given a set of conditions, fetch a revision from
253 * the given database connection.
255 * @param $db DatabaseBase
256 * @param $conditions Array
257 * @return Revision or null
259 private static function loadFromConds( $db, $conditions ) {
260 $res = Revision
::fetchFromConds( $db, $conditions );
262 $row = $res->fetchObject();
265 $ret = new Revision( $row );
274 * Return a wrapper for a series of database rows to
275 * fetch all of a given page's revisions in turn.
276 * Each row can be fed to the constructor to get objects.
278 * @param $title Title
279 * @return ResultWrapper
281 public static function fetchRevision( $title ) {
282 return Revision
::fetchFromConds(
284 array( 'rev_id=page_latest',
285 'page_namespace' => $title->getNamespace(),
286 'page_title' => $title->getDBkey(),
287 'page_id=rev_page' ) );
291 * Given a set of conditions, return a ResultWrapper
292 * which will return matching database rows with the
293 * fields necessary to build Revision objects.
295 * @param $db DatabaseBase
296 * @param $conditions Array
297 * @return ResultWrapper
299 private static function fetchFromConds( $db, $conditions ) {
300 $fields = self
::selectFields();
301 $fields[] = 'page_namespace';
302 $fields[] = 'page_title';
303 $fields[] = 'page_latest';
305 array( 'page', 'revision' ),
309 array( 'LIMIT' => 1 ) );
313 * Return the list of revision fields that should be selected to create
316 public static function selectFields() {
333 * Return the list of text fields that should be selected to read the
336 static function selectTextFields() {
344 * Return the list of page fields that should be selected from page table
346 static function selectPageFields() {
357 * @param $row Mixed: either a database row or an array
360 function __construct( $row ) {
361 if( is_object( $row ) ) {
362 $this->mId
= intval( $row->rev_id
);
363 $this->mPage
= intval( $row->rev_page
);
364 $this->mTextId
= intval( $row->rev_text_id
);
365 $this->mComment
= $row->rev_comment
;
366 $this->mUserText
= $row->rev_user_text
;
367 $this->mUser
= intval( $row->rev_user
);
368 $this->mMinorEdit
= intval( $row->rev_minor_edit
);
369 $this->mTimestamp
= $row->rev_timestamp
;
370 $this->mDeleted
= intval( $row->rev_deleted
);
372 if( !isset( $row->rev_parent_id
) ) {
373 $this->mParentId
= is_null($row->rev_parent_id
) ?
null : 0;
375 $this->mParentId
= intval( $row->rev_parent_id
);
378 if( !isset( $row->rev_len
) ||
is_null( $row->rev_len
) ) {
381 $this->mSize
= intval( $row->rev_len
);
384 if( isset( $row->page_latest
) ) {
385 $this->mCurrent
= ( $row->rev_id
== $row->page_latest
);
386 $this->mTitle
= Title
::newFromRow( $row );
388 $this->mCurrent
= false;
389 $this->mTitle
= null;
392 // Lazy extraction...
394 if( isset( $row->old_text
) ) {
395 $this->mTextRow
= $row;
397 // 'text' table row entry will be lazy-loaded
398 $this->mTextRow
= null;
400 } elseif( is_array( $row ) ) {
401 // Build a new revision to be saved...
404 $this->mId
= isset( $row['id'] ) ?
intval( $row['id'] ) : null;
405 $this->mPage
= isset( $row['page'] ) ?
intval( $row['page'] ) : null;
406 $this->mTextId
= isset( $row['text_id'] ) ?
intval( $row['text_id'] ) : null;
407 $this->mUserText
= isset( $row['user_text'] ) ?
strval( $row['user_text'] ) : $wgUser->getName();
408 $this->mUser
= isset( $row['user'] ) ?
intval( $row['user'] ) : $wgUser->getId();
409 $this->mMinorEdit
= isset( $row['minor_edit'] ) ?
intval( $row['minor_edit'] ) : 0;
410 $this->mTimestamp
= isset( $row['timestamp'] ) ?
strval( $row['timestamp'] ) : wfTimestamp( TS_MW
);
411 $this->mDeleted
= isset( $row['deleted'] ) ?
intval( $row['deleted'] ) : 0;
412 $this->mSize
= isset( $row['len'] ) ?
intval( $row['len'] ) : null;
413 $this->mParentId
= isset( $row['parent_id'] ) ?
intval( $row['parent_id'] ) : null;
415 // Enforce spacing trimming on supplied text
416 $this->mComment
= isset( $row['comment'] ) ?
trim( strval( $row['comment'] ) ) : null;
417 $this->mText
= isset( $row['text'] ) ?
rtrim( strval( $row['text'] ) ) : null;
418 $this->mTextRow
= null;
420 $this->mTitle
= null; # Load on demand if needed
421 $this->mCurrent
= false;
422 # If we still have no len_size, see it we have the text to figure it out
424 $this->mSize
= is_null( $this->mText
) ?
null : strlen( $this->mText
);
426 throw new MWException( 'Revision constructor passed invalid row format.' );
428 $this->mUnpatrolled
= null;
429 $this->mWikiID
= false;
437 public function getId() {
446 public function getTextId() {
447 return $this->mTextId
;
451 * Get parent revision ID (the original previous page revision)
455 public function getParentId() {
456 return $this->mParentId
;
460 * Returns the length of the text in this revision, or null if unknown.
464 public function getSize() {
469 * Returns the title of the page associated with this entry.
473 public function getTitle() {
474 if( isset( $this->mTitle
) ) {
475 return $this->mTitle
;
477 $dbr = wfGetDB( DB_SLAVE
, array(), $this->mWikiID
);
479 $row = $dbr->selectRow(
480 array( 'page', 'revision' ),
481 array( 'page_namespace', 'page_title' ),
482 array( 'page_id=rev_page',
483 'rev_id' => $this->mId
),
484 'Revision::getTitle' );
486 $this->mTitle
= Title
::makeTitle( $row->page_namespace
, $row->page_title
);
488 return $this->mTitle
;
492 * Set the title of the revision
494 * @param $title Title
496 public function setTitle( $title ) {
497 $this->mTitle
= $title;
505 public function getPage() {
510 * Fetch revision's user id if it's available to the specified audience.
511 * If the specified audience does not have access to it, zero will be
514 * @param $audience Integer: one of:
515 * Revision::FOR_PUBLIC to be displayed to all users
516 * Revision::FOR_THIS_USER to be displayed to $wgUser
517 * Revision::RAW get the ID regardless of permissions
522 public function getUser( $audience = self
::FOR_PUBLIC
) {
523 if( $audience == self
::FOR_PUBLIC
&& $this->isDeleted( self
::DELETED_USER
) ) {
525 } elseif( $audience == self
::FOR_THIS_USER
&& !$this->userCan( self
::DELETED_USER
) ) {
533 * Fetch revision's user id without regard for the current user's permissions
537 public function getRawUser() {
542 * Fetch revision's username if it's available to the specified audience.
543 * If the specified audience does not have access to the username, an
544 * empty string will be returned.
546 * @param $audience Integer: one of:
547 * Revision::FOR_PUBLIC to be displayed to all users
548 * Revision::FOR_THIS_USER to be displayed to $wgUser
549 * Revision::RAW get the text regardless of permissions
553 public function getUserText( $audience = self
::FOR_PUBLIC
) {
554 if( $audience == self
::FOR_PUBLIC
&& $this->isDeleted( self
::DELETED_USER
) ) {
556 } elseif( $audience == self
::FOR_THIS_USER
&& !$this->userCan( self
::DELETED_USER
) ) {
559 return $this->mUserText
;
564 * Fetch revision's username without regard for view restrictions
568 public function getRawUserText() {
569 return $this->mUserText
;
573 * Fetch revision comment if it's available to the specified audience.
574 * If the specified audience does not have access to the comment, an
575 * empty string will be returned.
577 * @param $audience Integer: one of:
578 * Revision::FOR_PUBLIC to be displayed to all users
579 * Revision::FOR_THIS_USER to be displayed to $wgUser
580 * Revision::RAW get the text regardless of permissions
584 function getComment( $audience = self
::FOR_PUBLIC
) {
585 if( $audience == self
::FOR_PUBLIC
&& $this->isDeleted( self
::DELETED_COMMENT
) ) {
587 } elseif( $audience == self
::FOR_THIS_USER
&& !$this->userCan( self
::DELETED_COMMENT
) ) {
590 return $this->mComment
;
595 * Fetch revision comment without regard for the current user's permissions
599 public function getRawComment() {
600 return $this->mComment
;
606 public function isMinor() {
607 return (bool)$this->mMinorEdit
;
611 * @return Integer rcid of the unpatrolled row, zero if there isn't one
613 public function isUnpatrolled() {
614 if( $this->mUnpatrolled
!== null ) {
615 return $this->mUnpatrolled
;
617 $dbr = wfGetDB( DB_SLAVE
, array(), $this->mWikiID
);
618 $this->mUnpatrolled
= $dbr->selectField( 'recentchanges',
620 array( // Add redundant user,timestamp condition so we can use the existing index
621 'rc_user_text' => $this->getRawUserText(),
622 'rc_timestamp' => $dbr->timestamp( $this->getTimestamp() ),
623 'rc_this_oldid' => $this->getId(),
628 return (int)$this->mUnpatrolled
;
632 * @param $field int one of DELETED_* bitfield constants
636 public function isDeleted( $field ) {
637 return ( $this->mDeleted
& $field ) == $field;
641 * Get the deletion bitfield of the revision
645 public function getVisibility() {
646 return (int)$this->mDeleted
;
650 * Fetch revision text if it's available to the specified audience.
651 * If the specified audience does not have the ability to view this
652 * revision, an empty string will be returned.
654 * @param $audience Integer: one of:
655 * Revision::FOR_PUBLIC to be displayed to all users
656 * Revision::FOR_THIS_USER to be displayed to $wgUser
657 * Revision::RAW get the text regardless of permissions
661 public function getText( $audience = self
::FOR_PUBLIC
) {
662 if( $audience == self
::FOR_PUBLIC
&& $this->isDeleted( self
::DELETED_TEXT
) ) {
664 } elseif( $audience == self
::FOR_THIS_USER
&& !$this->userCan( self
::DELETED_TEXT
) ) {
667 return $this->getRawText();
672 * Alias for getText(Revision::FOR_THIS_USER)
674 * @deprecated since 1.17
677 public function revText() {
678 wfDeprecated( __METHOD__
);
679 return $this->getText( self
::FOR_THIS_USER
);
683 * Fetch revision text without regard for view restrictions
687 public function getRawText() {
688 if( is_null( $this->mText
) ) {
689 // Revision text is immutable. Load on demand:
690 $this->mText
= $this->loadText();
698 public function getTimestamp() {
699 return wfTimestamp( TS_MW
, $this->mTimestamp
);
705 public function isCurrent() {
706 return $this->mCurrent
;
710 * Get previous revision for this title
712 * @return Revision or null
714 public function getPrevious() {
715 if( $this->getTitle() ) {
716 $prev = $this->getTitle()->getPreviousRevisionID( $this->getId() );
718 return Revision
::newFromTitle( $this->getTitle(), $prev );
725 * Get next revision for this title
727 * @return Revision or null
729 public function getNext() {
730 if( $this->getTitle() ) {
731 $next = $this->getTitle()->getNextRevisionID( $this->getId() );
733 return Revision
::newFromTitle( $this->getTitle(), $next );
740 * Get previous revision Id for this page_id
741 * This is used to populate rev_parent_id on save
743 * @param $db DatabaseBase
746 private function getPreviousRevisionId( $db ) {
747 if( is_null( $this->mPage
) ) {
750 # Use page_latest if ID is not given
752 $prevId = $db->selectField( 'page', 'page_latest',
753 array( 'page_id' => $this->mPage
),
756 $prevId = $db->selectField( 'revision', 'rev_id',
757 array( 'rev_page' => $this->mPage
, 'rev_id < ' . $this->mId
),
759 array( 'ORDER BY' => 'rev_id DESC' ) );
761 return intval( $prevId );
765 * Get revision text associated with an old or archive row
766 * $row is usually an object from wfFetchRow(), both the flags and the text
767 * field must be included
769 * @param $row Object: the text data
770 * @param $prefix String: table prefix (default 'old_')
771 * @return String: text the text requested or false on failure
773 public static function getRevisionText( $row, $prefix = 'old_' ) {
774 wfProfileIn( __METHOD__
);
777 $textField = $prefix . 'text';
778 $flagsField = $prefix . 'flags';
780 if( isset( $row->$flagsField ) ) {
781 $flags = explode( ',', $row->$flagsField );
786 if( isset( $row->$textField ) ) {
787 $text = $row->$textField;
789 wfProfileOut( __METHOD__
);
793 # Use external methods for external objects, text in table is URL-only then
794 if ( in_array( 'external', $flags ) ) {
796 $parts = explode( '://', $url, 2 );
797 if( count( $parts ) == 1 ||
$parts[1] == '' ) {
798 wfProfileOut( __METHOD__
);
801 $text = ExternalStore
::fetchFromURL( $url );
804 // If the text was fetched without an error, convert it
805 if ( $text !== false ) {
806 if( in_array( 'gzip', $flags ) ) {
807 # Deal with optional compression of archived pages.
808 # This can be done periodically via maintenance/compressOld.php, and
809 # as pages are saved if $wgCompressRevisions is set.
810 $text = gzinflate( $text );
813 if( in_array( 'object', $flags ) ) {
814 # Generic compressed storage
815 $obj = unserialize( $text );
816 if ( !is_object( $obj ) ) {
818 wfProfileOut( __METHOD__
);
821 $text = $obj->getText();
824 global $wgLegacyEncoding;
825 if( $text !== false && $wgLegacyEncoding
826 && !in_array( 'utf-8', $flags ) && !in_array( 'utf8', $flags ) )
828 # Old revisions kept around in a legacy encoding?
829 # Upconvert on demand.
830 # ("utf8" checked for compatibility with some broken
831 # conversion scripts 2008-12-30)
833 $text = $wgContLang->iconv( $wgLegacyEncoding, 'UTF-8', $text );
836 wfProfileOut( __METHOD__
);
841 * If $wgCompressRevisions is enabled, we will compress data.
842 * The input string is modified in place.
843 * Return value is the flags field: contains 'gzip' if the
844 * data is compressed, and 'utf-8' if we're saving in UTF-8
847 * @param $text Mixed: reference to a text
850 public static function compressRevisionText( &$text ) {
851 global $wgCompressRevisions;
854 # Revisions not marked this way will be converted
855 # on load if $wgLegacyCharset is set in the future.
858 if( $wgCompressRevisions ) {
859 if( function_exists( 'gzdeflate' ) ) {
860 $text = gzdeflate( $text );
863 wfDebug( "Revision::compressRevisionText() -- no zlib support, not compressing\n" );
866 return implode( ',', $flags );
870 * Insert a new revision into the database, returning the new revision ID
871 * number on success and dies horribly on failure.
873 * @param $dbw DatabaseBase: (master connection)
876 public function insertOn( $dbw ) {
877 global $wgDefaultExternalStore;
879 wfProfileIn( __METHOD__
);
881 $data = $this->mText
;
882 $flags = Revision
::compressRevisionText( $data );
884 # Write to external storage if required
885 if( $wgDefaultExternalStore ) {
886 // Store and get the URL
887 $data = ExternalStore
::insertToDefault( $data );
889 throw new MWException( "Unable to store text to external storage" );
894 $flags .= 'external';
897 # Record the text (or external storage URL) to the text table
898 if( !isset( $this->mTextId
) ) {
899 $old_id = $dbw->nextSequenceValue( 'text_old_id_seq' );
900 $dbw->insert( 'text',
904 'old_flags' => $flags,
907 $this->mTextId
= $dbw->insertId();
910 if ( $this->mComment
=== null ) $this->mComment
= "";
912 # Record the edit in revisions
913 $rev_id = isset( $this->mId
)
915 : $dbw->nextSequenceValue( 'revision_rev_id_seq' );
916 $dbw->insert( 'revision',
919 'rev_page' => $this->mPage
,
920 'rev_text_id' => $this->mTextId
,
921 'rev_comment' => $this->mComment
,
922 'rev_minor_edit' => $this->mMinorEdit ?
1 : 0,
923 'rev_user' => $this->mUser
,
924 'rev_user_text' => $this->mUserText
,
925 'rev_timestamp' => $dbw->timestamp( $this->mTimestamp
),
926 'rev_deleted' => $this->mDeleted
,
927 'rev_len' => $this->mSize
,
928 'rev_parent_id' => is_null($this->mParentId
) ?
929 $this->getPreviousRevisionId( $dbw ) : $this->mParentId
933 $this->mId
= !is_null( $rev_id ) ?
$rev_id : $dbw->insertId();
935 wfRunHooks( 'RevisionInsertComplete', array( &$this, $data, $flags ) );
937 wfProfileOut( __METHOD__
);
942 * Lazy-load the revision's text.
943 * Currently hardcoded to the 'text' table storage engine.
947 protected function loadText() {
948 wfProfileIn( __METHOD__
);
950 // Caching may be beneficial for massive use of external storage
951 global $wgRevisionCacheExpiry, $wgMemc;
952 $textId = $this->getTextId();
953 if( isset( $this->mWikiID
) && $this->mWikiID
!== false ) {
954 $key = wfForeignMemcKey( $this->mWikiID
, null, 'revisiontext', 'textid', $textId );
956 $key = wfMemcKey( 'revisiontext', 'textid', $textId );
958 if( $wgRevisionCacheExpiry ) {
959 $text = $wgMemc->get( $key );
960 if( is_string( $text ) ) {
961 wfDebug( __METHOD__
. ": got id $textId from cache\n" );
962 wfProfileOut( __METHOD__
);
967 // If we kept data for lazy extraction, use it now...
968 if ( isset( $this->mTextRow
) ) {
969 $row = $this->mTextRow
;
970 $this->mTextRow
= null;
976 // Text data is immutable; check slaves first.
977 $dbr = wfGetDB( DB_SLAVE
, array(), $this->mWikiID
);
978 $row = $dbr->selectRow( 'text',
979 array( 'old_text', 'old_flags' ),
980 array( 'old_id' => $this->getTextId() ),
984 if( !$row && wfGetLB()->getServerCount() > 1 ) {
985 // Possible slave lag!
986 $dbw = wfGetDB( DB_MASTER
, array(), $this->mWikiID
);
987 $row = $dbw->selectRow( 'text',
988 array( 'old_text', 'old_flags' ),
989 array( 'old_id' => $this->getTextId() ),
993 $text = self
::getRevisionText( $row );
995 # No negative caching -- negative hits on text rows may be due to corrupted slave servers
996 if( $wgRevisionCacheExpiry && $text !== false ) {
997 $wgMemc->set( $key, $text, $wgRevisionCacheExpiry );
1000 wfProfileOut( __METHOD__
);
1006 * Create a new null-revision for insertion into a page's
1007 * history. This will not re-save the text, but simply refer
1008 * to the text from the previous version.
1010 * Such revisions can for instance identify page rename
1011 * operations and other such meta-modifications.
1013 * @param $dbw DatabaseBase
1014 * @param $pageId Integer: ID number of the page to read from
1015 * @param $summary String: revision's summary
1016 * @param $minor Boolean: whether the revision should be considered as minor
1017 * @return Revision|null on error
1019 public static function newNullRevision( $dbw, $pageId, $summary, $minor ) {
1020 wfProfileIn( __METHOD__
);
1022 $current = $dbw->selectRow(
1023 array( 'page', 'revision' ),
1024 array( 'page_latest', 'rev_text_id', 'rev_len' ),
1026 'page_id' => $pageId,
1027 'page_latest=rev_id',
1032 $revision = new Revision( array(
1034 'comment' => $summary,
1035 'minor_edit' => $minor,
1036 'text_id' => $current->rev_text_id
,
1037 'parent_id' => $current->page_latest
,
1038 'len' => $current->rev_len
1044 wfProfileOut( __METHOD__
);
1049 * Determine if the current user is allowed to view a particular
1050 * field of this revision, if it's marked as deleted.
1052 * @param $field Integer:one of self::DELETED_TEXT,
1053 * self::DELETED_COMMENT,
1054 * self::DELETED_USER
1057 public function userCan( $field ) {
1058 return self
::userCanBitfield( $this->mDeleted
, $field );
1062 * Determine if the current user is allowed to view a particular
1063 * field of this revision, if it's marked as deleted. This is used
1064 * by various classes to avoid duplication.
1066 * @param $bitfield Integer: current field
1067 * @param $field Integer: one of self::DELETED_TEXT = File::DELETED_FILE,
1068 * self::DELETED_COMMENT = File::DELETED_COMMENT,
1069 * self::DELETED_USER = File::DELETED_USER
1072 public static function userCanBitfield( $bitfield, $field ) {
1073 if( $bitfield & $field ) { // aspect is deleted
1075 if ( $bitfield & self
::DELETED_RESTRICTED
) {
1076 $permission = 'suppressrevision';
1077 } elseif ( $field & self
::DELETED_TEXT
) {
1078 $permission = 'deletedtext';
1080 $permission = 'deletedhistory';
1082 wfDebug( "Checking for $permission due to $field match on $bitfield\n" );
1083 return $wgUser->isAllowed( $permission );
1090 * Get rev_timestamp from rev_id, without loading the rest of the row
1092 * @param $title Title
1093 * @param $id Integer
1096 static function getTimestampFromId( $title, $id ) {
1097 $wikiId = wfWikiID();
1098 $dbr = wfGetDB( DB_SLAVE
, array(), $wikiId );
1099 // Casting fix for DB2
1103 $conds = array( 'rev_id' => $id );
1104 $conds['rev_page'] = $title->getArticleId();
1105 $timestamp = $dbr->selectField( 'revision', 'rev_timestamp', $conds, __METHOD__
);
1106 if ( $timestamp === false && wfGetLB()->getServerCount() > 1 ) {
1107 # Not in slave, try master
1108 $dbw = wfGetDB( DB_MASTER
, array(), $wikiId );
1109 $timestamp = $dbw->selectField( 'revision', 'rev_timestamp', $conds, __METHOD__
);
1111 return wfTimestamp( TS_MW
, $timestamp );
1115 * Get count of revisions per page...not very efficient
1117 * @param $db DatabaseBase
1118 * @param $id Integer: page id
1121 static function countByPageId( $db, $id ) {
1122 $row = $db->selectRow( 'revision', 'COUNT(*) AS revCount',
1123 array( 'rev_page' => $id ), __METHOD__
);
1125 return $row->revCount
;
1131 * Get count of revisions per page...not very efficient
1133 * @param $db DatabaseBase
1134 * @param $title Title
1137 static function countByTitle( $db, $title ) {
1138 $id = $title->getArticleId();
1140 return Revision
::countByPageId( $db, $id );