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PageArchive.php
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1 <?php
27 
31 class PageArchive {
33  protected $title;
34 
36  protected $fileStatus;
37 
39  protected $revisionStatus;
40 
42  protected $config;
43 
44  public function __construct( $title, Config $config = null ) {
45  if ( is_null( $title ) ) {
46  throw new MWException( __METHOD__ . ' given a null title.' );
47  }
48  $this->title = $title;
49  if ( $config === null ) {
50  wfDebug( __METHOD__ . ' did not have a Config object passed to it' );
51  $config = MediaWikiServices::getInstance()->getMainConfig();
52  }
53  $this->config = $config;
54  }
55 
59  private function getRevisionStore() {
60  // TODO: Refactor: delete()/undelete() should live in a PageStore service;
61  // Methods in PageArchive and RevisionStore that deal with archive revisions
62  // should move into an ArchiveStore service (but could still be implemented
63  // together with RevisionStore).
64  return MediaWikiServices::getInstance()->getRevisionStore();
65  }
66 
67  public function doesWrites() {
68  return true;
69  }
70 
79  public static function listPagesBySearch( $term ) {
81  if ( $title ) {
82  $ns = $title->getNamespace();
83  $termMain = $title->getText();
84  $termDb = $title->getDBkey();
85  } else {
86  // Prolly won't work too good
87  // @todo handle bare namespace names cleanly?
88  $ns = 0;
89  $termMain = $termDb = $term;
90  }
91 
92  // Try search engine first
93  $engine = MediaWikiServices::getInstance()->newSearchEngine();
94  $engine->setLimitOffset( 100 );
95  $engine->setNamespaces( [ $ns ] );
96  $results = $engine->searchArchiveTitle( $termMain );
97  if ( !$results->isOK() ) {
98  $results = [];
99  } else {
100  $results = $results->getValue();
101  }
102 
103  if ( !$results ) {
104  // Fall back to regular prefix search
105  return self::listPagesByPrefix( $term );
106  }
107 
108  $dbr = wfGetDB( DB_REPLICA );
109  $condTitles = array_unique( array_map( function ( Title $t ) {
110  return $t->getDBkey();
111  }, $results ) );
112  $conds = [
113  'ar_namespace' => $ns,
114  $dbr->makeList( [ 'ar_title' => $condTitles ], LIST_OR ) . " OR ar_title " .
115  $dbr->buildLike( $termDb, $dbr->anyString() )
116  ];
117 
118  return self::listPages( $dbr, $conds );
119  }
120 
129  public static function listPagesByPrefix( $prefix ) {
130  $dbr = wfGetDB( DB_REPLICA );
131 
132  $title = Title::newFromText( $prefix );
133  if ( $title ) {
134  $ns = $title->getNamespace();
135  $prefix = $title->getDBkey();
136  } else {
137  // Prolly won't work too good
138  // @todo handle bare namespace names cleanly?
139  $ns = 0;
140  }
141 
142  $conds = [
143  'ar_namespace' => $ns,
144  'ar_title' . $dbr->buildLike( $prefix, $dbr->anyString() ),
145  ];
146 
147  return self::listPages( $dbr, $conds );
148  }
149 
155  protected static function listPages( $dbr, $condition ) {
156  return $dbr->select(
157  [ 'archive' ],
158  [
159  'ar_namespace',
160  'ar_title',
161  'count' => 'COUNT(*)'
162  ],
163  $condition,
164  __METHOD__,
165  [
166  'GROUP BY' => [ 'ar_namespace', 'ar_title' ],
167  'ORDER BY' => [ 'ar_namespace', 'ar_title' ],
168  'LIMIT' => 100,
169  ]
170  );
171  }
172 
179  public function listRevisions() {
180  $revisionStore = $this->getRevisionStore();
181  $queryInfo = $revisionStore->getArchiveQueryInfo();
182 
183  $conds = [
184  'ar_namespace' => $this->title->getNamespace(),
185  'ar_title' => $this->title->getDBkey(),
186  ];
187 
188  // NOTE: ordering by ar_timestamp and ar_id, to remove ambiguity.
189  // XXX: Ideally, we would be ordering by ar_timestamp and ar_rev_id, but since we
190  // don't have an index on ar_rev_id, that causes a file sort.
191  $options = [ 'ORDER BY' => 'ar_timestamp DESC, ar_id DESC' ];
192 
194  $queryInfo['tables'],
195  $queryInfo['fields'],
196  $conds,
197  $queryInfo['joins'],
198  $options,
199  ''
200  );
201 
202  $dbr = wfGetDB( DB_REPLICA );
203  return $dbr->select(
204  $queryInfo['tables'],
205  $queryInfo['fields'],
206  $conds,
207  __METHOD__,
208  $options,
209  $queryInfo['joins']
210  );
211  }
212 
221  public function listFiles() {
222  if ( $this->title->getNamespace() != NS_FILE ) {
223  return null;
224  }
225 
226  $dbr = wfGetDB( DB_REPLICA );
227  $fileQuery = ArchivedFile::getQueryInfo();
228  return $dbr->select(
229  $fileQuery['tables'],
230  $fileQuery['fields'],
231  [ 'fa_name' => $this->title->getDBkey() ],
232  __METHOD__,
233  [ 'ORDER BY' => 'fa_timestamp DESC' ],
234  $fileQuery['joins']
235  );
236  }
237 
246  public function getRevision( $timestamp ) {
247  $dbr = wfGetDB( DB_REPLICA );
248  $rec = $this->getRevisionByConditions(
249  [ 'ar_timestamp' => $dbr->timestamp( $timestamp ) ]
250  );
251  return $rec ? new Revision( $rec ) : null;
252  }
253 
260  public function getArchivedRevision( $revId ) {
261  // Protect against code switching from getRevision() passing in a timestamp.
262  Assert::parameterType( 'integer', $revId, '$revId' );
263 
264  $rec = $this->getRevisionByConditions( [ 'ar_rev_id' => $revId ] );
265  return $rec ? new Revision( $rec ) : null;
266  }
267 
274  private function getRevisionByConditions( array $conditions, array $options = [] ) {
275  $dbr = wfGetDB( DB_REPLICA );
276  $arQuery = $this->getRevisionStore()->getArchiveQueryInfo();
277 
278  $conditions = $conditions + [
279  'ar_namespace' => $this->title->getNamespace(),
280  'ar_title' => $this->title->getDBkey(),
281  ];
282 
283  $row = $dbr->selectRow(
284  $arQuery['tables'],
285  $arQuery['fields'],
286  $conditions,
287  __METHOD__,
288  $options,
289  $arQuery['joins']
290  );
291 
292  if ( $row ) {
293  return $this->getRevisionStore()->newRevisionFromArchiveRow( $row, 0, $this->title );
294  }
295 
296  return null;
297  }
298 
309  public function getPreviousRevision( $timestamp ) {
310  $dbr = wfGetDB( DB_REPLICA );
311 
312  // Check the previous deleted revision...
313  $row = $dbr->selectRow( 'archive',
314  [ 'ar_rev_id', 'ar_timestamp' ],
315  [ 'ar_namespace' => $this->title->getNamespace(),
316  'ar_title' => $this->title->getDBkey(),
317  'ar_timestamp < ' .
318  $dbr->addQuotes( $dbr->timestamp( $timestamp ) ) ],
319  __METHOD__,
320  [
321  'ORDER BY' => 'ar_timestamp DESC',
322  'LIMIT' => 1 ] );
323  $prevDeleted = $row ? wfTimestamp( TS_MW, $row->ar_timestamp ) : false;
324  $prevDeletedId = $row ? intval( $row->ar_rev_id ) : null;
325 
326  $row = $dbr->selectRow( [ 'page', 'revision' ],
327  [ 'rev_id', 'rev_timestamp' ],
328  [
329  'page_namespace' => $this->title->getNamespace(),
330  'page_title' => $this->title->getDBkey(),
331  'page_id = rev_page',
332  'rev_timestamp < ' .
333  $dbr->addQuotes( $dbr->timestamp( $timestamp ) ) ],
334  __METHOD__,
335  [
336  'ORDER BY' => 'rev_timestamp DESC',
337  'LIMIT' => 1 ] );
338  $prevLive = $row ? wfTimestamp( TS_MW, $row->rev_timestamp ) : false;
339  $prevLiveId = $row ? intval( $row->rev_id ) : null;
340 
341  if ( $prevLive && $prevLive > $prevDeleted ) {
342  // Most prior revision was live
343  $rec = $this->getRevisionStore()->getRevisionById( $prevLiveId );
344  $rec = $rec ? new Revision( $rec ) : null;
345  } elseif ( $prevDeleted ) {
346  // Most prior revision was deleted
347  $rec = $this->getArchivedRevision( $prevDeletedId );
348  } else {
349  $rec = null;
350  }
351 
352  return $rec;
353  }
354 
360  public function getLastRevisionId() {
361  $dbr = wfGetDB( DB_REPLICA );
362  $revId = $dbr->selectField(
363  'archive',
364  'ar_rev_id',
365  [ 'ar_namespace' => $this->title->getNamespace(),
366  'ar_title' => $this->title->getDBkey() ],
367  __METHOD__,
368  [ 'ORDER BY' => 'ar_timestamp DESC, ar_id DESC' ]
369  );
370 
371  return $revId ? intval( $revId ) : false;
372  }
373 
380  public function isDeleted() {
381  $dbr = wfGetDB( DB_REPLICA );
382  $row = $dbr->selectRow(
383  [ 'archive' ],
384  '1', // We don't care about the value. Allow the database to optimize.
385  [ 'ar_namespace' => $this->title->getNamespace(),
386  'ar_title' => $this->title->getDBkey() ],
387  __METHOD__
388  );
389 
390  return (bool)$row;
391  }
392 
412  public function undelete( $timestamps, $comment = '', $fileVersions = [],
413  $unsuppress = false, User $user = null, $tags = null
414  ) {
415  // If both the set of text revisions and file revisions are empty,
416  // restore everything. Otherwise, just restore the requested items.
417  $restoreAll = empty( $timestamps ) && empty( $fileVersions );
418 
419  $restoreText = $restoreAll || !empty( $timestamps );
420  $restoreFiles = $restoreAll || !empty( $fileVersions );
421 
422  if ( $restoreFiles && $this->title->getNamespace() == NS_FILE ) {
424  $img = MediaWikiServices::getInstance()->getRepoGroup()->getLocalRepo()
425  ->newFile( $this->title );
426  $img->load( File::READ_LATEST );
427  $this->fileStatus = $img->restore( $fileVersions, $unsuppress );
428  if ( !$this->fileStatus->isOK() ) {
429  return false;
430  }
431  $filesRestored = $this->fileStatus->successCount;
432  } else {
433  $filesRestored = 0;
434  }
435 
436  if ( $restoreText ) {
437  $this->revisionStatus = $this->undeleteRevisions( $timestamps, $unsuppress, $comment );
438  if ( !$this->revisionStatus->isOK() ) {
439  return false;
440  }
441 
442  $textRestored = $this->revisionStatus->getValue();
443  } else {
444  $textRestored = 0;
445  }
446 
447  // Touch the log!
448 
449  if ( !$textRestored && !$filesRestored ) {
450  wfDebug( "Undelete: nothing undeleted...\n" );
451 
452  return false;
453  }
454 
455  if ( $user === null ) {
456  global $wgUser;
457  $user = $wgUser;
458  }
459 
460  $logEntry = new ManualLogEntry( 'delete', 'restore' );
461  $logEntry->setPerformer( $user );
462  $logEntry->setTarget( $this->title );
463  $logEntry->setComment( $comment );
464  $logEntry->setTags( $tags );
465  $logEntry->setParameters( [
466  ':assoc:count' => [
467  'revisions' => $textRestored,
468  'files' => $filesRestored,
469  ],
470  ] );
471 
472  Hooks::run( 'ArticleUndeleteLogEntry', [ $this, &$logEntry, $user ] );
473 
474  $logid = $logEntry->insert();
475  $logEntry->publish( $logid );
476 
477  return [ $textRestored, $filesRestored, $comment ];
478  }
479 
491  private function undeleteRevisions( $timestamps, $unsuppress = false, $comment = '' ) {
492  if ( wfReadOnly() ) {
493  throw new ReadOnlyError();
494  }
495 
496  $dbw = wfGetDB( DB_MASTER );
497  $dbw->startAtomic( __METHOD__ );
498 
499  $restoreAll = empty( $timestamps );
500 
501  # Does this page already exist? We'll have to update it...
502  $article = WikiPage::factory( $this->title );
503  # Load latest data for the current page (T33179)
504  $article->loadPageData( 'fromdbmaster' );
505  $oldcountable = $article->isCountable();
506 
507  $page = $dbw->selectRow( 'page',
508  [ 'page_id', 'page_latest' ],
509  [ 'page_namespace' => $this->title->getNamespace(),
510  'page_title' => $this->title->getDBkey() ],
511  __METHOD__,
512  [ 'FOR UPDATE' ] // lock page
513  );
514 
515  if ( $page ) {
516  $makepage = false;
517  # Page already exists. Import the history, and if necessary
518  # we'll update the latest revision field in the record.
519 
520  # Get the time span of this page
521  $previousTimestamp = $dbw->selectField( 'revision', 'rev_timestamp',
522  [ 'rev_id' => $page->page_latest ],
523  __METHOD__ );
524 
525  if ( $previousTimestamp === false ) {
526  wfDebug( __METHOD__ . ": existing page refers to a page_latest that does not exist\n" );
527 
528  $status = Status::newGood( 0 );
529  $status->warning( 'undeleterevision-missing' );
530  $dbw->endAtomic( __METHOD__ );
531 
532  return $status;
533  }
534  } else {
535  # Have to create a new article...
536  $makepage = true;
537  $previousTimestamp = 0;
538  }
539 
540  $oldWhere = [
541  'ar_namespace' => $this->title->getNamespace(),
542  'ar_title' => $this->title->getDBkey(),
543  ];
544  if ( !$restoreAll ) {
545  $oldWhere['ar_timestamp'] = array_map( [ &$dbw, 'timestamp' ], $timestamps );
546  }
547 
548  $revisionStore = $this->getRevisionStore();
549  $queryInfo = $revisionStore->getArchiveQueryInfo();
550  $queryInfo['tables'][] = 'revision';
551  $queryInfo['fields'][] = 'rev_id';
552  $queryInfo['joins']['revision'] = [ 'LEFT JOIN', 'ar_rev_id=rev_id' ];
553 
557  $result = $dbw->select(
558  $queryInfo['tables'],
559  $queryInfo['fields'],
560  $oldWhere,
561  __METHOD__,
562  /* options */
563  [ 'ORDER BY' => 'ar_timestamp' ],
564  $queryInfo['joins']
565  );
566 
567  $rev_count = $result->numRows();
568  if ( !$rev_count ) {
569  wfDebug( __METHOD__ . ": no revisions to restore\n" );
570 
571  $status = Status::newGood( 0 );
572  $status->warning( "undelete-no-results" );
573  $dbw->endAtomic( __METHOD__ );
574 
575  return $status;
576  }
577 
578  // We use ar_id because there can be duplicate ar_rev_id even for the same
579  // page. In this case, we may be able to restore the first one.
580  $restoreFailedArIds = [];
581 
582  // Map rev_id to the ar_id that is allowed to use it. When checking later,
583  // if it doesn't match, the current ar_id can not be restored.
584 
585  // Value can be an ar_id or -1 (-1 means no ar_id can use it, since the
586  // rev_id is taken before we even start the restore).
587  $allowedRevIdToArIdMap = [];
588 
589  $latestRestorableRow = null;
590 
591  foreach ( $result as $row ) {
592  if ( $row->ar_rev_id ) {
593  // rev_id is taken even before we start restoring.
594  if ( $row->ar_rev_id === $row->rev_id ) {
595  $restoreFailedArIds[] = $row->ar_id;
596  $allowedRevIdToArIdMap[$row->ar_rev_id] = -1;
597  } else {
598  // rev_id is not taken yet in the DB, but it might be taken
599  // by a prior revision in the same restore operation. If
600  // not, we need to reserve it.
601  if ( isset( $allowedRevIdToArIdMap[$row->ar_rev_id] ) ) {
602  $restoreFailedArIds[] = $row->ar_id;
603  } else {
604  $allowedRevIdToArIdMap[$row->ar_rev_id] = $row->ar_id;
605  $latestRestorableRow = $row;
606  }
607  }
608  } else {
609  // If ar_rev_id is null, there can't be a collision, and a
610  // rev_id will be chosen automatically.
611  $latestRestorableRow = $row;
612  }
613  }
614 
615  $result->seek( 0 ); // move back
616 
617  $oldPageId = 0;
618  if ( $latestRestorableRow !== null ) {
619  $oldPageId = (int)$latestRestorableRow->ar_page_id; // pass this to ArticleUndelete hook
620 
621  // Grab the content to check consistency with global state before restoring the page.
622  // XXX: The only current use case is Wikibase, which tries to enforce uniqueness of
623  // certain things across all pages. There may be a better way to do that.
624  $revision = $revisionStore->newRevisionFromArchiveRow(
625  $latestRestorableRow,
626  0,
627  $this->title
628  );
629 
630  // TODO: use User::newFromUserIdentity from If610c68f4912e
631  // TODO: The User isn't used for anything in prepareSave()! We should drop it.
632  $user = User::newFromName( $revision->getUser( RevisionRecord::RAW )->getName(), false );
633 
634  foreach ( $revision->getSlotRoles() as $role ) {
635  $content = $revision->getContent( $role, RevisionRecord::RAW );
636 
637  // NOTE: article ID may not be known yet. prepareSave() should not modify the database.
638  $status = $content->prepareSave( $article, 0, -1, $user );
639  if ( !$status->isOK() ) {
640  $dbw->endAtomic( __METHOD__ );
641 
642  return $status;
643  }
644  }
645  }
646 
647  $newid = false; // newly created page ID
648  $restored = 0; // number of revisions restored
650  $revision = null;
651  $restoredPages = [];
652  // If there are no restorable revisions, we can skip most of the steps.
653  if ( $latestRestorableRow === null ) {
654  $failedRevisionCount = $rev_count;
655  } else {
656  if ( $makepage ) {
657  // Check the state of the newest to-be version...
658  if ( !$unsuppress
659  && ( $latestRestorableRow->ar_deleted & RevisionRecord::DELETED_TEXT )
660  ) {
661  $dbw->endAtomic( __METHOD__ );
662 
663  return Status::newFatal( "undeleterevdel" );
664  }
665  // Safe to insert now...
666  $newid = $article->insertOn( $dbw, $latestRestorableRow->ar_page_id );
667  if ( $newid === false ) {
668  // The old ID is reserved; let's pick another
669  $newid = $article->insertOn( $dbw );
670  }
671  $pageId = $newid;
672  } else {
673  // Check if a deleted revision will become the current revision...
674  if ( $latestRestorableRow->ar_timestamp > $previousTimestamp ) {
675  // Check the state of the newest to-be version...
676  if ( !$unsuppress
677  && ( $latestRestorableRow->ar_deleted & RevisionRecord::DELETED_TEXT )
678  ) {
679  $dbw->endAtomic( __METHOD__ );
680 
681  return Status::newFatal( "undeleterevdel" );
682  }
683  }
684 
685  $newid = false;
686  $pageId = $article->getId();
687  }
688 
689  foreach ( $result as $row ) {
690  // Check for key dupes due to needed archive integrity.
691  if ( $row->ar_rev_id && $allowedRevIdToArIdMap[$row->ar_rev_id] !== $row->ar_id ) {
692  continue;
693  }
694  // Insert one revision at a time...maintaining deletion status
695  // unless we are specifically removing all restrictions...
696  $revision = $revisionStore->newRevisionFromArchiveRow(
697  $row,
698  0,
699  $this->title,
700  [
701  'page_id' => $pageId,
702  'deleted' => $unsuppress ? 0 : $row->ar_deleted
703  ]
704  );
705 
706  // This will also copy the revision to ip_changes if it was an IP edit.
707  $revisionStore->insertRevisionOn( $revision, $dbw );
708 
709  $restored++;
710 
711  $legacyRevision = new Revision( $revision );
712  Hooks::run( 'ArticleRevisionUndeleted',
713  [ &$this->title, $legacyRevision, $row->ar_page_id ] );
714  $restoredPages[$row->ar_page_id] = true;
715  }
716 
717  // Now that it's safely stored, take it out of the archive
718  // Don't delete rows that we failed to restore
719  $toDeleteConds = $oldWhere;
720  $failedRevisionCount = count( $restoreFailedArIds );
721  if ( $failedRevisionCount > 0 ) {
722  $toDeleteConds[] = 'ar_id NOT IN ( ' . $dbw->makeList( $restoreFailedArIds ) . ' )';
723  }
724 
725  $dbw->delete( 'archive',
726  $toDeleteConds,
727  __METHOD__ );
728  }
729 
730  $status = Status::newGood( $restored );
731 
732  if ( $failedRevisionCount > 0 ) {
733  $status->warning(
734  wfMessage( 'undeleterevision-duplicate-revid', $failedRevisionCount ) );
735  }
736 
737  // Was anything restored at all?
738  if ( $restored ) {
739  $created = (bool)$newid;
740  // Attach the latest revision to the page...
741  // XXX: updateRevisionOn should probably move into a PageStore service.
742  $wasnew = $article->updateIfNewerOn( $dbw, $legacyRevision );
743  if ( $created || $wasnew ) {
744  // Update site stats, link tables, etc
745  // TODO: use DerivedPageDataUpdater from If610c68f4912e!
746  $article->doEditUpdates(
747  $legacyRevision,
748  User::newFromName( $revision->getUser( RevisionRecord::RAW )->getName(), false ),
749  [
750  'created' => $created,
751  'oldcountable' => $oldcountable,
752  'restored' => true
753  ]
754  );
755  }
756 
757  Hooks::run( 'ArticleUndelete',
758  [ &$this->title, $created, $comment, $oldPageId, $restoredPages ] );
759  if ( $this->title->getNamespace() == NS_FILE ) {
761  new HTMLCacheUpdate( $this->title, 'imagelinks', 'file-restore' )
762  );
763  }
764  }
765 
766  $dbw->endAtomic( __METHOD__ );
767 
768  return $status;
769  }
770 
774  public function getFileStatus() {
775  return $this->fileStatus;
776  }
777 
781  public function getRevisionStatus() {
782  return $this->revisionStatus;
783  }
784 }
static factory(Title $title)
Create a WikiPage object of the appropriate class for the given title.
Definition: WikiPage.php:138
static modifyDisplayQuery(&$tables, &$fields, &$conds, &$join_conds, &$options, $filter_tag='')
Applies all tags-related changes to a query.
Definition: ChangeTags.php:772
whereas SearchGetNearMatch runs after $term
Definition: hooks.txt:2863
getText()
Get the text form (spaces not underscores) of the main part.
Definition: Title.php:1003
processing should stop and the error should be shown to the user * false
Definition: hooks.txt:187
static getQueryInfo()
Return the tables, fields, and join conditions to be selected to create a new archivedfile object...
Show an error when the wiki is locked/read-only and the user tries to do something that requires writ...
Apache License January AND DISTRIBUTION Definitions License shall mean the terms and conditions for use
wfGetDB( $db, $groups=[], $wiki=false)
Get a Database object.
static listPages( $dbr, $condition)
injection txt This is an overview of how MediaWiki makes use of dependency injection The design described here grew from the discussion of RFC T384 The term dependency this means that anything an object needs to operate should be injected from the the object itself should only know narrow no concrete implementation of the logic it relies on The requirement to inject everything typically results in an architecture that based on two main types of and essentially stateless service objects that use other service objects to operate on the value objects As of the beginning MediaWiki is only starting to use the DI approach Much of the code still relies on global state or direct resulting in a highly cyclical dependency MediaWikiServices
Definition: injection.txt:23
static listPagesBySearch( $term)
List deleted pages recorded in the archive matching the given term, using search engine archive...
Definition: PageArchive.php:79
static listPagesByPrefix( $prefix)
List deleted pages recorded in the archive table matching the given title prefix. ...
title
listRevisions()
List the revisions of the given page.
const DB_MASTER
Definition: defines.php:26
Status $revisionStatus
Definition: PageArchive.php:39
The index of the header message $result[1]=The index of the body text message $result[2 through n]=Parameters passed to body text message. Please note the header message cannot receive/use parameters. 'ImgAuthModifyHeaders':Executed just before a file is streamed to a user via img_auth.php, allowing headers to be modified beforehand. $title:LinkTarget object & $headers:HTTP headers(name=> value, names are case insensitive). Two headers get special handling:If-Modified-Since(value must be a valid HTTP date) and Range(must be of the form "bytes=(\*-\*)") will be honored when streaming the file. 'ImportHandleLogItemXMLTag':When parsing a XML tag in a log item. Return false to stop further processing of the tag $reader:XMLReader object $logInfo:Array of information 'ImportHandlePageXMLTag':When parsing a XML tag in a page. Return false to stop further processing of the tag $reader:XMLReader object & $pageInfo:Array of information 'ImportHandleRevisionXMLTag':When parsing a XML tag in a page revision. Return false to stop further processing of the tag $reader:XMLReader object $pageInfo:Array of page information $revisionInfo:Array of revision information 'ImportHandleToplevelXMLTag':When parsing a top level XML tag. Return false to stop further processing of the tag $reader:XMLReader object 'ImportHandleUnknownUser':When a user doesn 't exist locally, this hook is called to give extensions an opportunity to auto-create it. If the auto-creation is successful, return false. $name:User name 'ImportHandleUploadXMLTag':When parsing a XML tag in a file upload. Return false to stop further processing of the tag $reader:XMLReader object $revisionInfo:Array of information 'ImportLogInterwikiLink':Hook to change the interwiki link used in log entries and edit summaries for transwiki imports. & $fullInterwikiPrefix:Interwiki prefix, may contain colons. & $pageTitle:String that contains page title. 'ImportSources':Called when reading from the $wgImportSources configuration variable. Can be used to lazy-load the import sources list. & $importSources:The value of $wgImportSources. Modify as necessary. See the comment in DefaultSettings.php for the detail of how to structure this array. 'InfoAction':When building information to display on the action=info page. $context:IContextSource object & $pageInfo:Array of information 'InitializeArticleMaybeRedirect':MediaWiki check to see if title is a redirect. & $title:Title object for the current page & $request:WebRequest & $ignoreRedirect:boolean to skip redirect check & $target:Title/string of redirect target & $article:Article object 'InternalParseBeforeLinks':during Parser 's internalParse method before links but after nowiki/noinclude/includeonly/onlyinclude and other processings. & $parser:Parser object & $text:string containing partially parsed text & $stripState:Parser 's internal StripState object 'InternalParseBeforeSanitize':during Parser 's internalParse method just before the parser removes unwanted/dangerous HTML tags and after nowiki/noinclude/includeonly/onlyinclude and other processings. Ideal for syntax-extensions after template/parser function execution which respect nowiki and HTML-comments. & $parser:Parser object & $text:string containing partially parsed text & $stripState:Parser 's internal StripState object 'InterwikiLoadPrefix':When resolving if a given prefix is an interwiki or not. Return true without providing an interwiki to continue interwiki search. $prefix:interwiki prefix we are looking for. & $iwData:output array describing the interwiki with keys iw_url, iw_local, iw_trans and optionally iw_api and iw_wikiid. 'InvalidateEmailComplete':Called after a user 's email has been invalidated successfully. $user:user(object) whose email is being invalidated 'IRCLineURL':When constructing the URL to use in an IRC notification. Callee may modify $url and $query, URL will be constructed as $url . $query & $url:URL to index.php & $query:Query string $rc:RecentChange object that triggered url generation 'IsFileCacheable':Override the result of Article::isFileCacheable()(if true) & $article:article(object) being checked 'IsTrustedProxy':Override the result of IP::isTrustedProxy() & $ip:IP being check & $result:Change this value to override the result of IP::isTrustedProxy() 'IsUploadAllowedFromUrl':Override the result of UploadFromUrl::isAllowedUrl() $url:URL used to upload from & $allowed:Boolean indicating if uploading is allowed for given URL 'isValidEmailAddr':Override the result of Sanitizer::validateEmail(), for instance to return false if the domain name doesn 't match your organization. $addr:The e-mail address entered by the user & $result:Set this and return false to override the internal checks 'isValidPassword':Override the result of User::isValidPassword() $password:The password entered by the user & $result:Set this and return false to override the internal checks $user:User the password is being validated for 'Language::getMessagesFileName':$code:The language code or the language we 're looking for a messages file for & $file:The messages file path, you can override this to change the location. 'LanguageGetNamespaces':Provide custom ordering for namespaces or remove namespaces. Do not use this hook to add namespaces. Use CanonicalNamespaces for that. & $namespaces:Array of namespaces indexed by their numbers 'LanguageGetTranslatedLanguageNames':Provide translated language names. & $names:array of language code=> language name $code:language of the preferred translations 'LanguageLinks':Manipulate a page 's language links. This is called in various places to allow extensions to define the effective language links for a page. $title:The page 's Title. & $links:Array with elements of the form "language:title" in the order that they will be output. & $linkFlags:Associative array mapping prefixed links to arrays of flags. Currently unused, but planned to provide support for marking individual language links in the UI, e.g. for featured articles. 'LanguageSelector':Hook to change the language selector available on a page. $out:The output page. $cssClassName:CSS class name of the language selector. 'LinkBegin':DEPRECATED since 1.28! Use HtmlPageLinkRendererBegin instead. Used when generating internal and interwiki links in Linker::link(), before processing starts. Return false to skip default processing and return $ret. See documentation for Linker::link() for details on the expected meanings of parameters. $skin:the Skin object $target:the Title that the link is pointing to & $html:the contents that the< a > tag should have(raw HTML) $result
Definition: hooks.txt:1970
Config $config
Definition: PageArchive.php:42
The User object encapsulates all of the user-specific settings (user_id, name, rights, email address, options, last login time).
Definition: User.php:51
static newFatal( $message)
Factory function for fatal errors.
Definition: StatusValue.php:68
Status::newGood()` to allow deletion, and then `return false` from the hook function. Ensure you consume the 'ChangeTagAfterDelete' hook to carry out custom deletion actions. $tag:name of the tag $user:user initiating the action & $status:Status object. See above. 'ChangeTagsListActive':Allows you to nominate which of the tags your extension uses are in active use. & $tags:list of all active tags. Append to this array. 'ChangeTagsAfterUpdateTags':Called after tags have been updated with the ChangeTags::updateTags function. Params:$addedTags:tags effectively added in the update $removedTags:tags effectively removed in the update $prevTags:tags that were present prior to the update $rc_id:recentchanges table id $rev_id:revision table id $log_id:logging table id $params:tag params $rc:RecentChange being tagged when the tagging accompanies the action, or null $user:User who performed the tagging when the tagging is subsequent to the action, or null 'ChangeTagsAllowedAdd':Called when checking if a user can add tags to a change. & $allowedTags:List of all the tags the user is allowed to add. Any tags the user wants to add( $addTags) that are not in this array will cause it to fail. You may add or remove tags to this array as required. $addTags:List of tags user intends to add. $user:User who is adding the tags. 'ChangeUserGroups':Called before user groups are changed. $performer:The User who will perform the change $user:The User whose groups will be changed & $add:The groups that will be added & $remove:The groups that will be removed 'Collation::factory':Called if $wgCategoryCollation is an unknown collation. $collationName:Name of the collation in question & $collationObject:Null. Replace with a subclass of the Collation class that implements the collation given in $collationName. 'ConfirmEmailComplete':Called after a user 's email has been confirmed successfully. $user:user(object) whose email is being confirmed 'ContentAlterParserOutput':Modify parser output for a given content object. Called by Content::getParserOutput after parsing has finished. Can be used for changes that depend on the result of the parsing but have to be done before LinksUpdate is called(such as adding tracking categories based on the rendered HTML). $content:The Content to render $title:Title of the page, as context $parserOutput:ParserOutput to manipulate 'ContentGetParserOutput':Customize parser output for a given content object, called by AbstractContent::getParserOutput. May be used to override the normal model-specific rendering of page content. $content:The Content to render $title:Title of the page, as context $revId:The revision ID, as context $options:ParserOptions for rendering. To avoid confusing the parser cache, the output can only depend on parameters provided to this hook function, not on global state. $generateHtml:boolean, indicating whether full HTML should be generated. If false, generation of HTML may be skipped, but other information should still be present in the ParserOutput object. & $output:ParserOutput, to manipulate or replace 'ContentHandlerDefaultModelFor':Called when the default content model is determined for a given title. May be used to assign a different model for that title. $title:the Title in question & $model:the model name. Use with CONTENT_MODEL_XXX constants. 'ContentHandlerForModelID':Called when a ContentHandler is requested for a given content model name, but no entry for that model exists in $wgContentHandlers. Note:if your extension implements additional models via this hook, please use GetContentModels hook to make them known to core. $modeName:the requested content model name & $handler:set this to a ContentHandler object, if desired. 'ContentModelCanBeUsedOn':Called to determine whether that content model can be used on a given page. This is especially useful to prevent some content models to be used in some special location. $contentModel:ID of the content model in question $title:the Title in question. & $ok:Output parameter, whether it is OK to use $contentModel on $title. Handler functions that modify $ok should generally return false to prevent further hooks from further modifying $ok. 'ContribsPager::getQueryInfo':Before the contributions query is about to run & $pager:Pager object for contributions & $queryInfo:The query for the contribs Pager 'ContribsPager::reallyDoQuery':Called before really executing the query for My Contributions & $data:an array of results of all contribs queries $pager:The ContribsPager object hooked into $offset:Index offset, inclusive $limit:Exact query limit $descending:Query direction, false for ascending, true for descending 'ContributionsLineEnding':Called before a contributions HTML line is finished $page:SpecialPage object for contributions & $ret:the HTML line $row:the DB row for this line & $classes:the classes to add to the surrounding< li > & $attribs:associative array of other HTML attributes for the< li > element. Currently only data attributes reserved to MediaWiki are allowed(see Sanitizer::isReservedDataAttribute). 'ContributionsToolLinks':Change tool links above Special:Contributions $id:User identifier $title:User page title & $tools:Array of tool links $specialPage:SpecialPage instance for context and services. Can be either SpecialContributions or DeletedContributionsPage. Extensions should type hint against a generic SpecialPage though. 'ConvertContent':Called by AbstractContent::convert when a conversion to another content model is requested. Handler functions that modify $result should generally return false to disable further attempts at conversion. $content:The Content object to be converted. $toModel:The ID of the content model to convert to. $lossy:boolean indicating whether lossy conversion is allowed. & $result:Output parameter, in case the handler function wants to provide a converted Content object. Note that $result->getContentModel() must return $toModel. 'ContentSecurityPolicyDefaultSource':Modify the allowed CSP load sources. This affects all directives except for the script directive. If you want to add a script source, see ContentSecurityPolicyScriptSource hook. & $defaultSrc:Array of Content-Security-Policy allowed sources $policyConfig:Current configuration for the Content-Security-Policy header $mode:ContentSecurityPolicy::REPORT_ONLY_MODE or ContentSecurityPolicy::FULL_MODE depending on type of header 'ContentSecurityPolicyDirectives':Modify the content security policy directives. Use this only if ContentSecurityPolicyDefaultSource and ContentSecurityPolicyScriptSource do not meet your needs. & $directives:Array of CSP directives $policyConfig:Current configuration for the CSP header $mode:ContentSecurityPolicy::REPORT_ONLY_MODE or ContentSecurityPolicy::FULL_MODE depending on type of header 'ContentSecurityPolicyScriptSource':Modify the allowed CSP script sources. Note that you also have to use ContentSecurityPolicyDefaultSource if you want non-script sources to be loaded from whatever you add. & $scriptSrc:Array of CSP directives $policyConfig:Current configuration for the CSP header $mode:ContentSecurityPolicy::REPORT_ONLY_MODE or ContentSecurityPolicy::FULL_MODE depending on type of header 'CustomEditor':When invoking the page editor Return true to allow the normal editor to be used, or false if implementing a custom editor, e.g. for a special namespace, etc. $article:Article being edited $user:User performing the edit 'DeletedContribsPager::reallyDoQuery':Called before really executing the query for Special:DeletedContributions Similar to ContribsPager::reallyDoQuery & $data:an array of results of all contribs queries $pager:The DeletedContribsPager object hooked into $offset:Index offset, inclusive $limit:Exact query limit $descending:Query direction, false for ascending, true for descending 'DeletedContributionsLineEnding':Called before a DeletedContributions HTML line is finished. Similar to ContributionsLineEnding $page:SpecialPage object for DeletedContributions & $ret:the HTML line $row:the DB row for this line & $classes:the classes to add to the surrounding< li > & $attribs:associative array of other HTML attributes for the< li > element. Currently only data attributes reserved to MediaWiki are allowed(see Sanitizer::isReservedDataAttribute). 'DeleteUnknownPreferences':Called by the cleanupPreferences.php maintenance script to build a WHERE clause with which to delete preferences that are not known about. This hook is used by extensions that have dynamically-named preferences that should not be deleted in the usual cleanup process. For example, the Gadgets extension creates preferences prefixed with 'gadget-', and so anything with that prefix is excluded from the deletion. &where:An array that will be passed as the $cond parameter to IDatabase::select() to determine what will be deleted from the user_properties table. $db:The IDatabase object, useful for accessing $db->buildLike() etc. 'DifferenceEngineAfterLoadNewText':called in DifferenceEngine::loadNewText() after the new revision 's content has been loaded into the class member variable $differenceEngine->mNewContent but before returning true from this function. $differenceEngine:DifferenceEngine object 'DifferenceEngineLoadTextAfterNewContentIsLoaded':called in DifferenceEngine::loadText() after the new revision 's content has been loaded into the class member variable $differenceEngine->mNewContent but before checking if the variable 's value is null. This hook can be used to inject content into said class member variable. $differenceEngine:DifferenceEngine object 'DifferenceEngineMarkPatrolledLink':Allows extensions to change the "mark as patrolled" link which is shown both on the diff header as well as on the bottom of a page, usually wrapped in a span element which has class="patrollink". $differenceEngine:DifferenceEngine object & $markAsPatrolledLink:The "mark as patrolled" link HTML(string) $rcid:Recent change ID(rc_id) for this change(int) 'DifferenceEngineMarkPatrolledRCID':Allows extensions to possibly change the rcid parameter. For example the rcid might be set to zero due to the user being the same as the performer of the change but an extension might still want to show it under certain conditions. & $rcid:rc_id(int) of the change or 0 $differenceEngine:DifferenceEngine object $change:RecentChange object $user:User object representing the current user 'DifferenceEngineNewHeader':Allows extensions to change the $newHeader variable, which contains information about the new revision, such as the revision 's author, whether the revision was marked as a minor edit or not, etc. $differenceEngine:DifferenceEngine object & $newHeader:The string containing the various #mw-diff-otitle[1-5] divs, which include things like revision author info, revision comment, RevisionDelete link and more $formattedRevisionTools:Array containing revision tools, some of which may have been injected with the DiffRevisionTools hook $nextlink:String containing the link to the next revision(if any) $status
Definition: hooks.txt:1244
wfTimestamp( $outputtype=TS_UNIX, $ts=0)
Get a timestamp string in one of various formats.
listFiles()
List the deleted file revisions for this page, if it&#39;s a file page.
wfReadOnly()
Check whether the wiki is in read-only mode.
either a unescaped string or a HtmlArmor object after in associative array form externallinks including delete and has completed for all link tables whether this was an auto creation use $formDescriptor instead default is conds Array Extra conditions for the No matching items in log is displayed if loglist is empty msgKey Array If you want a nice box with a set this to the key of the message First element is the message additional optional elements are parameters for the key that are processed with wfMessage() -> params() ->parseAsBlock() - offset Set to overwrite offset parameter in $wgRequest set to '' to unset offset - wrap String Wrap the message in html(usually something like "&lt
Interface for configuration instances.
Definition: Config.php:28
Status $fileStatus
Definition: PageArchive.php:36
Class to invalidate the HTML cache of all the pages linking to a given title.
getDBkey()
Get the main part with underscores.
Definition: Title.php:1021
static newGood( $value=null)
Factory function for good results.
Definition: StatusValue.php:81
wfDebug( $text, $dest='all', array $context=[])
Sends a line to the debug log if enabled or, optionally, to a comment in output.
isDeleted()
Quick check if any archived revisions are present for the page.
undeleteRevisions( $timestamps, $unsuppress=false, $comment='')
This is the meaty bit – It restores archived revisions of the given page to the revision table...
null means default in associative array with keys and values unescaped Should be merged with default with a value of false meaning to suppress the attribute in associative array with keys and values unescaped & $options
Definition: hooks.txt:1972
this hook is for auditing only or null if authentication failed before getting that far or null if we can t even determine that When $user is not null
Definition: hooks.txt:767
getNamespace()
Get the namespace index, i.e.
Definition: Title.php:1045
const NS_FILE
Definition: Defines.php:66
This document is intended to provide useful advice for parties seeking to redistribute MediaWiki to end users It s targeted particularly at maintainers for Linux since it s been observed that distribution packages of MediaWiki often break We ve consistently had to recommend that users seeking support use official tarballs instead of their distribution s and this often solves whatever problem the user is having It would be nice if this could such as
Definition: distributors.txt:9
the value to return A Title object or null for latest all implement SearchIndexField $engine
Definition: hooks.txt:2886
const LIST_OR
Definition: Defines.php:42
getLastRevisionId()
Returns the ID of the latest deleted revision.
getRevision( $timestamp)
Return a Revision object containing data for the deleted revision.
injection txt This is an overview of how MediaWiki makes use of dependency injection The design described here grew from the discussion of RFC T384 The term dependency this means that anything an object needs to operate should be injected from the the object itself should only know narrow no concrete implementation of the logic it relies on The requirement to inject everything typically results in an architecture that based on two main types of and essentially stateless service objects that use other service objects to operate on the value objects As of the beginning MediaWiki is only starting to use the DI approach Much of the code still relies on global state or direct resulting in a highly cyclical dependency which acts as the top level factory for services in MediaWiki which can be used to gain access to default instances of various services MediaWikiServices however also allows new services to be defined and default services to be redefined Services are defined or redefined by providing a callback the instantiator that will return a new instance of the service When it will create an instance of MediaWikiServices and populate it with the services defined in the files listed by thereby bootstrapping the DI framework Per $wgServiceWiringFiles lists includes ServiceWiring php
Definition: injection.txt:35
static addUpdate(DeferrableUpdate $update, $stage=self::POSTSEND)
Add an update to the deferred list to be run later by execute()
getArchivedRevision( $revId)
Return the archived revision with the given ID.
__construct( $title, Config $config=null)
Definition: PageArchive.php:44
Title $title
Definition: PageArchive.php:33
Used to show archived pages and eventually restore them.
Definition: PageArchive.php:31
getPreviousRevision( $timestamp)
Return the most-previous revision, either live or deleted, against the deleted revision given by time...
const DB_REPLICA
Definition: defines.php:25
static newFromName( $name, $validate='valid')
Static factory method for creation from username.
Definition: User.php:535
getRevisionByConditions(array $conditions, array $options=[])
$content
Definition: pageupdater.txt:72
undelete( $timestamps, $comment='', $fileVersions=[], $unsuppress=false, User $user=null, $tags=null)
Restore the given (or all) text and file revisions for the page.
return true to allow those checks to and false if checking is done & $user
Definition: hooks.txt:1454
static run( $event, array $args=[], $deprecatedVersion=null)
Call hook functions defined in Hooks::register and $wgHooks.
Definition: Hooks.php:200
static newFromText( $text, $defaultNamespace=NS_MAIN)
Create a new Title from text, such as what one would find in a link.
Definition: Title.php:322