includes/WikiPage.php

   1 <?php
   2 /**
   3  * Abstract class for type hinting (accepts WikiPage, Article, ImagePage, CategoryPage)
   4  */
   5 abstract class Page {}
   6
   7 /**
   8  * Class representing a MediaWiki article and history.
   9  *
  10  * Some fields are public only for backwards-compatibility. Use accessors.
  11  * In the past, this class was part of Article.php and everything was public.
  12  *
  13  * @internal documentation reviewed 15 Mar 2010
  14  */
  15 class WikiPage extends Page {
  16         /**
  17          * @var Title
  18          */
  19         public $mTitle = null;
  20
  21         /**@{{
  22          * @protected
  23          */
  24         public $mDataLoaded = false;         // !< Boolean
  25         public $mIsRedirect = false;         // !< Boolean
  26         public $mLatest = false;             // !< Integer (false means "not loaded")
  27         public $mPreparedEdit = false;       // !< Array
  28         /**@}}*/
  29
  30         /**
  31          * @var Title
  32          */
  33         protected $mRedirectTarget = null;
  34
  35         /**
  36          * @var Revision
  37          */
  38         protected $mLastRevision = null;
  39
  40         /**
  41          * @var string; timestamp of the current revision or empty string if not loaded
  42          */
  43         protected $mTimestamp = '';
  44
  45         /**
  46          * @var string
  47          */
  48         protected $mTouched = '19700101000000';
  49
  50         /**
  51          * Constructor and clear the article
  52          * @param $title Title Reference to a Title object.
  53          */
  54         public function __construct( Title $title ) {
  55                 $this->mTitle = $title;
  56         }
  57
  58         /**
  59          * Create a WikiPage object of the appropriate class for the given title.
  60          *
  61          * @param $title Title
  62          * @return WikiPage object of the appropriate type
  63          */
  64         public static function factory( Title $title ) {
  65                 $ns = $title->getNamespace();
  66
  67                 if ( $ns == NS_MEDIA ) {
  68                         throw new MWException( "NS_MEDIA is a virtual namespace; use NS_FILE." );
  69                 } elseif ( $ns < 0 ) {
  70                         throw new MWException( "Invalid or virtual namespace $ns given." );
  71                 }
  72
  73                 switch ( $ns ) {
  74                         case NS_FILE:
  75                                 $page = new WikiFilePage( $title );
  76                                 break;
  77                         case NS_CATEGORY:
  78                                 $page = new WikiCategoryPage( $title );
  79                                 break;
  80                         default:
  81                                 $page = new WikiPage( $title );
  82                 }
  83
  84                 return $page;
  85         }
  86
  87         /**
  88          * Constructor from a page id
  89          *
  90          * @param $id Int article ID to load
  91          *
  92          * @return WikiPage
  93          */
  94         public static function newFromID( $id ) {
  95                 $t = Title::newFromID( $id );
  96                 if ( $t ) {
  97                         return self::factory( $t );
  98                 }
  99                 return null;
 100         }
 101
 102         /**
 103          * Returns overrides for action handlers.
 104          * Classes listed here will be used instead of the default one when
 105          * (and only when) $wgActions[$action] === true. This allows subclasses
 106          * to override the default behavior.
 107          *
 108          * @todo: move this UI stuff somewhere else
 109          *
 110          * @return Array
 111          */
 112         public function getActionOverrides() {
 113                 return array();
 114         }
 115
 116         /**
 117          * If this page is a redirect, get its target
 118          *
 119          * The target will be fetched from the redirect table if possible.
 120          * If this page doesn't have an entry there, call insertRedirect()
 121          * @return Title|mixed object, or null if this page is not a redirect
 122          */
 123         public function getRedirectTarget() {
 124                 if ( !$this->mTitle->isRedirect() ) {
 125                         return null;
 126                 }
 127
 128                 if ( $this->mRedirectTarget !== null ) {
 129                         return $this->mRedirectTarget;
 130                 }
 131
 132                 # Query the redirect table
 133                 $dbr = wfGetDB( DB_SLAVE );
 134                 $row = $dbr->selectRow( 'redirect',
 135                         array( 'rd_namespace', 'rd_title', 'rd_fragment', 'rd_interwiki' ),
 136                         array( 'rd_from' => $this->getId() ),
 137                         __METHOD__
 138                 );
 139
 140                 // rd_fragment and rd_interwiki were added later, populate them if empty
 141                 if ( $row && !is_null( $row->rd_fragment ) && !is_null( $row->rd_interwiki ) ) {
 142                         return $this->mRedirectTarget = Title::makeTitle(
 143                                 $row->rd_namespace, $row->rd_title,
 144                                 $row->rd_fragment, $row->rd_interwiki );
 145                 }
 146
 147                 # This page doesn't have an entry in the redirect table
 148                 return $this->mRedirectTarget = $this->insertRedirect();
 149         }
 150
 151         /**
 152          * Insert an entry for this page into the redirect table.
 153          *
 154          * Don't call this function directly unless you know what you're doing.
 155          * @return Title object or null if not a redirect
 156          */
 157         public function insertRedirect() {
 158                 // recurse through to only get the final target
 159                 $retval = Title::newFromRedirectRecurse( $this->getRawText() );
 160                 if ( !$retval ) {
 161                         return null;
 162                 }
 163                 $this->insertRedirectEntry( $retval );
 164                 return $retval;
 165         }
 166
 167         /**
 168          * Insert or update the redirect table entry for this page to indicate
 169          * it redirects to $rt .
 170          * @param $rt Title redirect target
 171          */
 172         public function insertRedirectEntry( $rt ) {
 173                 $dbw = wfGetDB( DB_MASTER );
 174                 $dbw->replace( 'redirect', array( 'rd_from' ),
 175                         array(
 176                                 'rd_from'      => $this->getId(),
 177                                 'rd_namespace' => $rt->getNamespace(),
 178                                 'rd_title'     => $rt->getDBkey(),
 179                                 'rd_fragment'  => $rt->getFragment(),
 180                                 'rd_interwiki' => $rt->getInterwiki(),
 181                         ),
 182                         __METHOD__
 183                 );
 184         }
 185
 186         /**
 187          * Get the Title object or URL this page redirects to
 188          *
 189          * @return mixed false, Title of in-wiki target, or string with URL
 190          */
 191         public function followRedirect() {
 192                 return $this->getRedirectURL( $this->getRedirectTarget() );
 193         }
 194
 195         /**
 196          * Get the Title object or URL to use for a redirect. We use Title
 197          * objects for same-wiki, non-special redirects and URLs for everything
 198          * else.
 199          * @param $rt Title Redirect target
 200          * @return mixed false, Title object of local target, or string with URL
 201          */
 202         public function getRedirectURL( $rt ) {
 203                 if ( $rt ) {
 204                         if ( $rt->getInterwiki() != '' ) {
 205                                 if ( $rt->isLocal() ) {
 206                                         // Offsite wikis need an HTTP redirect.
 207                                         //
 208                                         // This can be hard to reverse and may produce loops,
 209                                         // so they may be disabled in the site configuration.
 210                                         $source = $this->mTitle->getFullURL( 'redirect=no' );
 211                                         return $rt->getFullURL( 'rdfrom=' . urlencode( $source ) );
 212                                 }
 213                         } else {
 214                                 if ( $rt->isSpecialPage() ) {
 215                                         // Gotta handle redirects to special pages differently:
 216                                         // Fill the HTTP response "Location" header and ignore
 217                                         // the rest of the page we're on.
 218                                         //
 219                                         // This can be hard to reverse, so they may be disabled.
 220                                         if ( $rt->isSpecial( 'Userlogout' ) ) {
 221                                                 // rolleyes
 222                                         } else {
 223                                                 return $rt->getFullURL();
 224                                         }
 225                                 }
 226
 227                                 return $rt;
 228                         }
 229                 }
 230
 231                 // No or invalid redirect
 232                 return false;
 233         }
 234
 235         /**
 236          * Get the title object of the article
 237          * @return Title object of this page
 238          */
 239         public function getTitle() {
 240                 return $this->mTitle;
 241         }
 242
 243         /**
 244          * Clear the object
 245          */
 246         public function clear() {
 247                 $this->mDataLoaded = false;
 248
 249                 $this->mRedirectTarget = null; # Title object if set
 250                 $this->mLastRevision = null; # Latest revision
 251                 $this->mTouched = '19700101000000';
 252                 $this->mTimestamp = '';
 253                 $this->mIsRedirect = false;
 254                 $this->mLatest = false;
 255                 $this->mPreparedEdit = false;
 256         }
 257
 258         /**
 259          * Get the text that needs to be saved in order to undo all revisions
 260          * between $undo and $undoafter. Revisions must belong to the same page,
 261          * must exist and must not be deleted
 262          * @param $undo Revision
 263          * @param $undoafter Revision Must be an earlier revision than $undo
 264          * @return mixed string on success, false on failure
 265          */
 266         public function getUndoText( Revision $undo, Revision $undoafter = null ) {
 267                 $cur_text = $this->getRawText();
 268                 if ( $cur_text === false ) {
 269                         return false; // no page
 270                 }
 271                 $undo_text = $undo->getText();
 272                 $undoafter_text = $undoafter->getText();
 273
 274                 if ( $cur_text == $undo_text ) {
 275                         # No use doing a merge if it's just a straight revert.
 276                         return $undoafter_text;
 277                 }
 278
 279                 $undone_text = '';
 280
 281                 if ( !wfMerge( $undo_text, $undoafter_text, $cur_text, $undone_text ) ) {
 282                         return false;
 283                 }
 284
 285                 return $undone_text;
 286         }
 287
 288         /**
 289          * Return the list of revision fields that should be selected to create
 290          * a new page.
 291          *
 292          * @return array
 293          */
 294         public static function selectFields() {
 295                 return array(
 296                         'page_id',
 297                         'page_namespace',
 298                         'page_title',
 299                         'page_restrictions',
 300                         'page_counter',
 301                         'page_is_redirect',
 302                         'page_is_new',
 303                         'page_random',
 304                         'page_touched',
 305                         'page_latest',
 306                         'page_len',
 307                 );
 308         }
 309
 310         /**
 311          * Fetch a page record with the given conditions
 312          * @param $dbr DatabaseBase object
 313          * @param $conditions Array
 314          * @return mixed Database result resource, or false on failure
 315          */
 316         protected function pageData( $dbr, $conditions ) {
 317                 $fields = self::selectFields();
 318
 319                 wfRunHooks( 'ArticlePageDataBefore', array( &$this, &$fields ) );
 320
 321                 $row = $dbr->selectRow( 'page', $fields, $conditions, __METHOD__ );
 322
 323                 wfRunHooks( 'ArticlePageDataAfter', array( &$this, &$row ) );
 324
 325                 return $row;
 326         }
 327
 328         /**
 329          * Fetch a page record matching the Title object's namespace and title
 330          * using a sanitized title string
 331          *
 332          * @param $dbr DatabaseBase object
 333          * @param $title Title object
 334          * @return mixed Database result resource, or false on failure
 335          */
 336         public function pageDataFromTitle( $dbr, $title ) {
 337                 return $this->pageData( $dbr, array(
 338                         'page_namespace' => $title->getNamespace(),
 339                         'page_title'     => $title->getDBkey() ) );
 340         }
 341
 342         /**
 343          * Fetch a page record matching the requested ID
 344          *
 345          * @param $dbr DatabaseBase
 346          * @param $id Integer
 347          * @return mixed Database result resource, or false on failure
 348          */
 349         public function pageDataFromId( $dbr, $id ) {
 350                 return $this->pageData( $dbr, array( 'page_id' => $id ) );
 351         }
 352
 353         /**
 354          * Set the general counter, title etc data loaded from
 355          * some source.
 356          *
 357          * @param $data Object|String One of the following:
 358          *              A DB query result object or...
 359          *              "fromdb" to get from a slave DB or...
 360          *              "fromdbmaster" to get from the master DB
 361          * @return void
 362          */
 363         public function loadPageData( $data = 'fromdb' ) {
 364                 if ( $data === 'fromdbmaster' ) {
 365                         $data = $this->pageDataFromTitle( wfGetDB( DB_MASTER ), $this->mTitle );
 366                 } elseif ( $data === 'fromdb' ) { // slave
 367                         $data = $this->pageDataFromTitle( wfGetDB( DB_SLAVE ), $this->mTitle );
 368                         # Use a "last rev inserted" timestamp key to dimish the issue of slave lag.
 369                         # Note that DB also stores the master position in the session and checks it.
 370                         $touched = $this->getCachedLastEditTime();
 371                         if ( $touched ) { // key set
 372                                 if ( !$data || $touched > wfTimestamp( TS_MW, $data->page_touched ) ) {
 373                                         $data = $this->pageDataFromTitle( wfGetDB( DB_MASTER ), $this->mTitle );
 374                                 }
 375                         }
 376                 }
 377
 378                 $lc = LinkCache::singleton();
 379
 380                 if ( $data ) {
 381                         $lc->addGoodLinkObjFromRow( $this->mTitle, $data );
 382
 383                         $this->mTitle->loadFromRow( $data );
 384
 385                         # Old-fashioned restrictions
 386                         $this->mTitle->loadRestrictions( $data->page_restrictions );
 387
 388                         $this->mTouched     = wfTimestamp( TS_MW, $data->page_touched );
 389                         $this->mIsRedirect  = intval( $data->page_is_redirect );
 390                         $this->mLatest      = intval( $data->page_latest );
 391                 } else {
 392                         $lc->addBadLinkObj( $this->mTitle );
 393
 394                         $this->mTitle->loadFromRow( false );
 395                 }
 396
 397                 $this->mDataLoaded = true;
 398         }
 399
 400         /**
 401          * @return int Page ID
 402          */
 403         public function getId() {
 404                 return $this->mTitle->getArticleID();
 405         }
 406
 407         /**
 408          * @return bool Whether or not the page exists in the database
 409          */
 410         public function exists() {
 411                 return $this->mTitle->exists();
 412         }
 413
 414         /**
 415          * Check if this page is something we're going to be showing
 416          * some sort of sensible content for. If we return false, page
 417          * views (plain action=view) will return an HTTP 404 response,
 418          * so spiders and robots can know they're following a bad link.
 419          *
 420          * @return bool
 421          */
 422         public function hasViewableContent() {
 423                 return $this->mTitle->exists() || $this->mTitle->isAlwaysKnown();
 424         }
 425
 426         /**
 427          * Get the number of views of this page
 428          *
 429          * @return int The view count for the page
 430          */
 431         public function getCount() {
 432                 return $this->mTitle->getCount();
 433         }
 434
 435         /**
 436          * Determine whether a page would be suitable for being counted as an
 437          * article in the site_stats table based on the title & its content
 438          *
 439          * @param $editInfo Object or false: object returned by prepareTextForEdit(),
 440          *        if false, the current database state will be used
 441          * @return Boolean
 442          */
 443         public function isCountable( $editInfo = false ) {
 444                 global $wgArticleCountMethod;
 445
 446                 if ( !$this->mTitle->isContentPage() ) {
 447                         return false;
 448                 }
 449
 450                 $text = $editInfo ? $editInfo->pst : false;
 451
 452                 if ( $this->isRedirect( $text ) ) {
 453                         return false;
 454                 }
 455
 456                 switch ( $wgArticleCountMethod ) {
 457                 case 'any':
 458                         return true;
 459                 case 'comma':
 460                         if ( $text === false ) {
 461                                 $text = $this->getRawText();
 462                         }
 463                         return strpos( $text,  ',' ) !== false;
 464                 case 'link':
 465                         if ( $editInfo ) {
 466                                 // ParserOutput::getLinks() is a 2D array of page links, so
 467                                 // to be really correct we would need to recurse in the array
 468                                 // but the main array should only have items in it if there are
 469                                 // links.
 470                                 return (bool)count( $editInfo->output->getLinks() );
 471                         } else {
 472                                 return (bool)wfGetDB( DB_SLAVE )->selectField( 'pagelinks', 1,
 473                                         array( 'pl_from' => $this->getId() ), __METHOD__ );
 474                         }
 475                 }
 476         }
 477
 478         /**
 479          * Tests if the article text represents a redirect
 480          *
 481          * @param $text mixed string containing article contents, or boolean
 482          * @return bool
 483          */
 484         public function isRedirect( $text = false ) {
 485                 if ( $text === false ) {
 486                         if ( !$this->mDataLoaded ) {
 487                                 $this->loadPageData();
 488                         }
 489
 490                         return (bool)$this->mIsRedirect;
 491                 } else {
 492                         return Title::newFromRedirect( $text ) !== null;
 493                 }
 494         }
 495
 496         /**
 497          * Loads page_touched and returns a value indicating if it should be used
 498          * @return boolean true if not a redirect
 499          */
 500         public function checkTouched() {
 501                 if ( !$this->mDataLoaded ) {
 502                         $this->loadPageData();
 503                 }
 504                 return !$this->mIsRedirect;
 505         }
 506
 507         /**
 508          * Get the page_touched field
 509          * @return string containing GMT timestamp
 510          */
 511         public function getTouched() {
 512                 if ( !$this->mDataLoaded ) {
 513                         $this->loadPageData();
 514                 }
 515                 return $this->mTouched;
 516         }
 517
 518         /**
 519          * Get the page_latest field
 520          * @return integer rev_id of current revision
 521          */
 522         public function getLatest() {
 523                 if ( !$this->mDataLoaded ) {
 524                         $this->loadPageData();
 525                 }
 526                 return (int)$this->mLatest;
 527         }
 528
 529         /**
 530          * Loads everything except the text
 531          * This isn't necessary for all uses, so it's only done if needed.
 532          */
 533         protected function loadLastEdit() {
 534                 if ( $this->mLastRevision !== null ) {
 535                         return; // already loaded
 536                 }
 537
 538                 $latest = $this->getLatest();
 539                 if ( !$latest ) {
 540                         return; // page doesn't exist or is missing page_latest info
 541                 }
 542
 543                 $revision = Revision::newFromPageId( $this->getId(), $latest );
 544                 if ( $revision ) { // sanity
 545                         $this->setLastEdit( $revision );
 546                 }
 547         }
 548
 549         /**
 550          * Set the latest revision
 551          */
 552         protected function setLastEdit( Revision $revision ) {
 553                 $this->mLastRevision = $revision;
 554                 $this->mTimestamp = $revision->getTimestamp();
 555         }
 556
 557         /**
 558          * Get the latest revision
 559          * @return Revision|null
 560          */
 561         public function getRevision() {
 562                 $this->loadLastEdit();
 563                 if ( $this->mLastRevision ) {
 564                         return $this->mLastRevision;
 565                 }
 566                 return null;
 567         }
 568
 569         /**
 570          * Get the text of the current revision. No side-effects...
 571          *
 572          * @param $audience Integer: one of:
 573          *      Revision::FOR_PUBLIC       to be displayed to all users
 574          *      Revision::FOR_THIS_USER    to be displayed to $wgUser
 575          *      Revision::RAW              get the text regardless of permissions
 576          * @return String|false The text of the current revision
 577          */
 578         public function getText( $audience = Revision::FOR_PUBLIC ) {
 579                 $this->loadLastEdit();
 580                 if ( $this->mLastRevision ) {
 581                         return $this->mLastRevision->getText( $audience );
 582                 }
 583                 return false;
 584         }
 585
 586         /**
 587          * Get the text of the current revision. No side-effects...
 588          *
 589          * @return String|false The text of the current revision
 590          */
 591         public function getRawText() {
 592                 $this->loadLastEdit();
 593                 if ( $this->mLastRevision ) {
 594                         return $this->mLastRevision->getRawText();
 595                 }
 596                 return false;
 597         }
 598
 599         /**
 600          * @return string MW timestamp of last article revision
 601          */
 602         public function getTimestamp() {
 603                 // Check if the field has been filled by WikiPage::setTimestamp()
 604                 if ( !$this->mTimestamp ) {
 605                         $this->loadLastEdit();
 606                 }
 607                 return wfTimestamp( TS_MW, $this->mTimestamp );
 608         }
 609
 610         /**
 611          * Set the page timestamp (use only to avoid DB queries)
 612          * @param $ts string MW timestamp of last article revision
 613          * @return void
 614          */
 615         public function setTimestamp( $ts ) {
 616                 $this->mTimestamp = wfTimestamp( TS_MW, $ts );
 617         }
 618
 619         /**
 620          * @param $audience Integer: one of:
 621          *      Revision::FOR_PUBLIC       to be displayed to all users
 622          *      Revision::FOR_THIS_USER    to be displayed to $wgUser
 623          *      Revision::RAW              get the text regardless of permissions
 624          * @return int user ID for the user that made the last article revision
 625          */
 626         public function getUser( $audience = Revision::FOR_PUBLIC ) {
 627                 $this->loadLastEdit();
 628                 if ( $this->mLastRevision ) {
 629                         return $this->mLastRevision->getUser( $audience );
 630                 } else {
 631                         return -1;
 632                 }
 633         }
 634
 635         /**
 636          * @param $audience Integer: one of:
 637          *      Revision::FOR_PUBLIC       to be displayed to all users
 638          *      Revision::FOR_THIS_USER    to be displayed to $wgUser
 639          *      Revision::RAW              get the text regardless of permissions
 640          * @return string username of the user that made the last article revision
 641          */
 642         public function getUserText( $audience = Revision::FOR_PUBLIC ) {
 643                 $this->loadLastEdit();
 644                 if ( $this->mLastRevision ) {
 645                         return $this->mLastRevision->getUserText( $audience );
 646                 } else {
 647                         return '';
 648                 }
 649         }
 650
 651         /**
 652          * @param $audience Integer: one of:
 653          *      Revision::FOR_PUBLIC       to be displayed to all users
 654          *      Revision::FOR_THIS_USER    to be displayed to $wgUser
 655          *      Revision::RAW              get the text regardless of permissions
 656          * @return string Comment stored for the last article revision
 657          */
 658         public function getComment( $audience = Revision::FOR_PUBLIC ) {
 659                 $this->loadLastEdit();
 660                 if ( $this->mLastRevision ) {
 661                         return $this->mLastRevision->getComment( $audience );
 662                 } else {
 663                         return '';
 664                 }
 665         }
 666
 667         /**
 668          * Returns true if last revision was marked as "minor edit"
 669          *
 670          * @return boolean Minor edit indicator for the last article revision.
 671          */
 672         public function getMinorEdit() {
 673                 $this->loadLastEdit();
 674                 if ( $this->mLastRevision ) {
 675                         return $this->mLastRevision->isMinor();
 676                 } else {
 677                         return false;
 678                 }
 679         }
 680
 681         /**
 682          * Get the cached timestamp for the last time the page changed.
 683          * This is only used to help handle slave lag by comparing to page_touched.
 684          * @return string MW timestamp
 685          */
 686         protected function getCachedLastEditTime() {
 687                 global $wgMemc;
 688                 $key = wfMemcKey( 'page-lastedit', md5( $this->mTitle->getPrefixedDBkey() ) );
 689                 return $wgMemc->get( $key );
 690         }
 691
 692         /**
 693          * Set the cached timestamp for the last time the page changed.
 694          * This is only used to help handle slave lag by comparing to page_touched.
 695          * @param $timestamp string
 696          * @return void
 697          */
 698         public function setCachedLastEditTime( $timestamp ) {
 699                 global $wgMemc;
 700                 $key = wfMemcKey( 'page-lastedit', md5( $this->mTitle->getPrefixedDBkey() ) );
 701                 $wgMemc->set( $key, wfTimestamp( TS_MW, $timestamp ), 60*15 );
 702         }
 703
 704         /**
 705          * Get a list of users who have edited this article, not including the user who made
 706          * the most recent revision, which you can get from $article->getUser() if you want it
 707          * @return UserArrayFromResult
 708          */
 709         public function getContributors() {
 710                 # @todo FIXME: This is expensive; cache this info somewhere.
 711
 712                 $dbr = wfGetDB( DB_SLAVE );
 713
 714                 if ( $dbr->implicitGroupby() ) {
 715                         $realNameField = 'user_real_name';
 716                 } else {
 717                         $realNameField = 'MIN(user_real_name) AS user_real_name';
 718                 }
 719
 720                 $tables = array( 'revision', 'user' );
 721
 722                 $fields = array(
 723                         'rev_user as user_id',
 724                         'rev_user_text AS user_name',
 725                         $realNameField,
 726                         'MAX(rev_timestamp) AS timestamp',
 727                 );
 728
 729                 $conds = array( 'rev_page' => $this->getId() );
 730
 731                 // The user who made the top revision gets credited as "this page was last edited by
 732                 // John, based on contributions by Tom, Dick and Harry", so don't include them twice.
 733                 $user = $this->getUser();
 734                 if ( $user ) {
 735                         $conds[] = "rev_user != $user";
 736                 } else {
 737                         $conds[] = "rev_user_text != {$dbr->addQuotes( $this->getUserText() )}";
 738                 }
 739
 740                 $conds[] = "{$dbr->bitAnd( 'rev_deleted', Revision::DELETED_USER )} = 0"; // username hidden?
 741
 742                 $jconds = array(
 743                         'user' => array( 'LEFT JOIN', 'rev_user = user_id' ),
 744                 );
 745
 746                 $options = array(
 747                         'GROUP BY' => array( 'rev_user', 'rev_user_text' ),
 748                         'ORDER BY' => 'timestamp DESC',
 749                 );
 750
 751                 $res = $dbr->select( $tables, $fields, $conds, __METHOD__, $options, $jconds );
 752                 return new UserArrayFromResult( $res );
 753         }
 754
 755         /**
 756          * Get the last N authors
 757          * @param $num Integer: number of revisions to get
 758          * @param $revLatest String: the latest rev_id, selected from the master (optional)
 759          * @return array Array of authors, duplicates not removed
 760          */
 761         public function getLastNAuthors( $num, $revLatest = 0 ) {
 762                 wfProfileIn( __METHOD__ );
 763                 // First try the slave
 764                 // If that doesn't have the latest revision, try the master
 765                 $continue = 2;
 766                 $db = wfGetDB( DB_SLAVE );
 767
 768                 do {
 769                         $res = $db->select( array( 'page', 'revision' ),
 770                                 array( 'rev_id', 'rev_user_text' ),
 771                                 array(
 772                                         'page_namespace' => $this->mTitle->getNamespace(),
 773                                         'page_title' => $this->mTitle->getDBkey(),
 774                                         'rev_page = page_id'
 775                                 ), __METHOD__,
 776                                 array(
 777                                         'ORDER BY' => 'rev_timestamp DESC',
 778                                         'LIMIT' => $num
 779                                 )
 780                         );
 781
 782                         if ( !$res ) {
 783                                 wfProfileOut( __METHOD__ );
 784                                 return array();
 785                         }
 786
 787                         $row = $db->fetchObject( $res );
 788
 789                         if ( $continue == 2 && $revLatest && $row->rev_id != $revLatest ) {
 790                                 $db = wfGetDB( DB_MASTER );
 791                                 $continue--;
 792                         } else {
 793                                 $continue = 0;
 794                         }
 795                 } while ( $continue );
 796
 797                 $authors = array( $row->rev_user_text );
 798
 799                 foreach ( $res as $row ) {
 800                         $authors[] = $row->rev_user_text;
 801                 }
 802
 803                 wfProfileOut( __METHOD__ );
 804                 return $authors;
 805         }
 806
 807         /**
 808          * Should the parser cache be used?
 809          *
 810          * @param $parserOptions ParserOptions to check
 811          * @param $oldid int
 812          * @return boolean
 813          */
 814         public function isParserCacheUsed( ParserOptions $parserOptions, $oldid ) {
 815                 global $wgEnableParserCache;
 816
 817                 return $wgEnableParserCache
 818                         && $parserOptions->getStubThreshold() == 0
 819                         && $this->mTitle->exists()
 820                         && ( $oldid === null || $oldid === 0 || $oldid === $this->getLatest() )
 821                         && $this->mTitle->isWikitextPage();
 822         }
 823
 824         /**
 825          * Get a ParserOutput for the given ParserOptions and revision ID.
 826          * The parser cache will be used if possible.
 827          *
 828          * @since 1.19
 829          * @param $parserOptions ParserOptions to use for the parse operation
 830          * @param $oldid Revision ID to get the text from, passing null or 0 will
 831          *               get the current revision (default value)
 832          * @return ParserOutput or false if the revision was not found
 833          */
 834         public function getParserOutput( ParserOptions $parserOptions, $oldid = null ) {
 835                 wfProfileIn( __METHOD__ );
 836
 837                 $useParserCache = $this->isParserCacheUsed( $parserOptions, $oldid );
 838                 wfDebug( __METHOD__ . ': using parser cache: ' . ( $useParserCache ? 'yes' : 'no' ) . "\n" );
 839                 if ( $parserOptions->getStubThreshold() ) {
 840                         wfIncrStats( 'pcache_miss_stub' );
 841                 }
 842
 843                 if ( $useParserCache ) {
 844                         $parserOutput = ParserCache::singleton()->get( $this, $parserOptions );
 845                         if ( $parserOutput !== false ) {
 846                                 wfProfileOut( __METHOD__ );
 847                                 return $parserOutput;
 848                         }
 849                 }
 850
 851                 if ( $oldid === null || $oldid === 0 ) {
 852                         $oldid = $this->getLatest();
 853                 }
 854
 855                 $pool = new PoolWorkArticleView( $this, $parserOptions, $oldid, $useParserCache );
 856                 $pool->execute();
 857
 858                 wfProfileOut( __METHOD__ );
 859
 860                 return $pool->getParserOutput();
 861         }
 862
 863         /**
 864          * Do standard deferred updates after page view
 865          * @param $user User The relevant user
 866          */
 867         public function doViewUpdates( User $user ) {
 868                 global $wgDisableCounters;
 869                 if ( wfReadOnly() ) {
 870                         return;
 871                 }
 872
 873                 # Don't update page view counters on views from bot users (bug 14044)
 874                 if ( !$wgDisableCounters && !$user->isAllowed( 'bot' ) && $this->mTitle->exists() ) {
 875                         DeferredUpdates::addUpdate( new ViewCountUpdate( $this->getId() ) );
 876                         DeferredUpdates::addUpdate( new SiteStatsUpdate( 1, 0, 0 ) );
 877                 }
 878
 879                 # Update newtalk / watchlist notification status
 880                 $user->clearNotification( $this->mTitle );
 881         }
 882
 883         /**
 884          * Perform the actions of a page purging
 885          */
 886         public function doPurge() {
 887                 global $wgUseSquid;
 888
 889                 if( !wfRunHooks( 'ArticlePurge', array( &$this ) ) ){
 890                         return false;
 891                 }
 892
 893                 // Invalidate the cache
 894                 $this->mTitle->invalidateCache();
 895                 $this->clear();
 896
 897                 if ( $wgUseSquid ) {
 898                         // Commit the transaction before the purge is sent
 899                         $dbw = wfGetDB( DB_MASTER );
 900                         $dbw->commit();
 901
 902                         // Send purge
 903                         $update = SquidUpdate::newSimplePurge( $this->mTitle );
 904                         $update->doUpdate();
 905                 }
 906
 907                 if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
 908                         if ( $this->mTitle->exists() ) {
 909                                 $text = $this->getRawText();
 910                         } else {
 911                                 $text = false;
 912                         }
 913
 914                         MessageCache::singleton()->replace( $this->mTitle->getDBkey(), $text );
 915                 }
 916                 return true;
 917         }
 918
 919         /**
 920          * Insert a new empty page record for this article.
 921          * This *must* be followed up by creating a revision
 922          * and running $this->updateRevisionOn( ... );
 923          * or else the record will be left in a funky state.
 924          * Best if all done inside a transaction.
 925          *
 926          * @param $dbw DatabaseBase
 927          * @return int The newly created page_id key, or false if the title already existed
 928          */
 929         public function insertOn( $dbw ) {
 930                 wfProfileIn( __METHOD__ );
 931
 932                 $page_id = $dbw->nextSequenceValue( 'page_page_id_seq' );
 933                 $dbw->insert( 'page', array(
 934                         'page_id'           => $page_id,
 935                         'page_namespace'    => $this->mTitle->getNamespace(),
 936                         'page_title'        => $this->mTitle->getDBkey(),
 937                         'page_counter'      => 0,
 938                         'page_restrictions' => '',
 939                         'page_is_redirect'  => 0, # Will set this shortly...
 940                         'page_is_new'       => 1,
 941                         'page_random'       => wfRandom(),
 942                         'page_touched'      => $dbw->timestamp(),
 943                         'page_latest'       => 0, # Fill this in shortly...
 944                         'page_len'          => 0, # Fill this in shortly...
 945                 ), __METHOD__, 'IGNORE' );
 946
 947                 $affected = $dbw->affectedRows();
 948
 949                 if ( $affected ) {
 950                         $newid = $dbw->insertId();
 951                         $this->mTitle->resetArticleID( $newid );
 952                 }
 953                 wfProfileOut( __METHOD__ );
 954
 955                 return $affected ? $newid : false;
 956         }
 957
 958         /**
 959          * Update the page record to point to a newly saved revision.
 960          *
 961          * @param $dbw DatabaseBase: object
 962          * @param $revision Revision: For ID number, and text used to set
 963          *                  length and redirect status fields
 964          * @param $lastRevision Integer: if given, will not overwrite the page field
 965          *                      when different from the currently set value.
 966          *                      Giving 0 indicates the new page flag should be set
 967          *                      on.
 968          * @param $lastRevIsRedirect Boolean: if given, will optimize adding and
 969          *                           removing rows in redirect table.
 970          * @return bool true on success, false on failure
 971          * @private
 972          */
 973         public function updateRevisionOn( $dbw, $revision, $lastRevision = null, $lastRevIsRedirect = null ) {
 974                 wfProfileIn( __METHOD__ );
 975
 976                 $text = $revision->getText();
 977                 $len = strlen( $text );
 978                 $rt = Title::newFromRedirectRecurse( $text );
 979
 980                 $conditions = array( 'page_id' => $this->getId() );
 981
 982                 if ( !is_null( $lastRevision ) ) {
 983                         # An extra check against threads stepping on each other
 984                         $conditions['page_latest'] = $lastRevision;
 985                 }
 986
 987                 $now = wfTimestampNow();
 988                 $dbw->update( 'page',
 989                         array( /* SET */
 990                                 'page_latest'      => $revision->getId(),
 991                                 'page_touched'     => $dbw->timestamp( $now ),
 992                                 'page_is_new'      => ( $lastRevision === 0 ) ? 1 : 0,
 993                                 'page_is_redirect' => $rt !== null ? 1 : 0,
 994                                 'page_len'         => $len,
 995                         ),
 996                         $conditions,
 997                         __METHOD__ );
 998
 999                 $result = $dbw->affectedRows() != 0;
1000                 if ( $result ) {
1001                         $this->updateRedirectOn( $dbw, $rt, $lastRevIsRedirect );
1002                         $this->setLastEdit( $revision );
1003                         $this->setCachedLastEditTime( $now );
1004                         $this->mLatest = $revision->getId();
1005                         $this->mIsRedirect = (bool)$rt;
1006                         # Update the LinkCache.
1007                         LinkCache::singleton()->addGoodLinkObj( $this->getId(), $this->mTitle, $len, $this->mIsRedirect, $this->mLatest );
1008                 }
1009
1010                 wfProfileOut( __METHOD__ );
1011                 return $result;
1012         }
1013
1014         /**
1015          * Add row to the redirect table if this is a redirect, remove otherwise.
1016          *
1017          * @param $dbw DatabaseBase
1018          * @param $redirectTitle Title object pointing to the redirect target,
1019          *                       or NULL if this is not a redirect
1020          * @param $lastRevIsRedirect If given, will optimize adding and
1021          *                           removing rows in redirect table.
1022          * @return bool true on success, false on failure
1023          * @private
1024          */
1025         public function updateRedirectOn( $dbw, $redirectTitle, $lastRevIsRedirect = null ) {
1026                 // Always update redirects (target link might have changed)
1027                 // Update/Insert if we don't know if the last revision was a redirect or not
1028                 // Delete if changing from redirect to non-redirect
1029                 $isRedirect = !is_null( $redirectTitle );
1030
1031                 if ( !$isRedirect && !is_null( $lastRevIsRedirect ) && $lastRevIsRedirect === $isRedirect ) {
1032                         return true;
1033                 }
1034
1035                 wfProfileIn( __METHOD__ );
1036                 if ( $isRedirect ) {
1037                         $this->insertRedirectEntry( $redirectTitle );
1038                 } else {
1039                         // This is not a redirect, remove row from redirect table
1040                         $where = array( 'rd_from' => $this->getId() );
1041                         $dbw->delete( 'redirect', $where, __METHOD__ );
1042                 }
1043
1044                 if ( $this->getTitle()->getNamespace() == NS_FILE ) {
1045                         RepoGroup::singleton()->getLocalRepo()->invalidateImageRedirect( $this->getTitle() );
1046                 }
1047                 wfProfileOut( __METHOD__ );
1048
1049                 return ( $dbw->affectedRows() != 0 );
1050         }
1051
1052         /**
1053          * If the given revision is newer than the currently set page_latest,
1054          * update the page record. Otherwise, do nothing.
1055          *
1056          * @param $dbw Database object
1057          * @param $revision Revision object
1058          * @return mixed
1059          */
1060         public function updateIfNewerOn( $dbw, $revision ) {
1061                 wfProfileIn( __METHOD__ );
1062
1063                 $row = $dbw->selectRow(
1064                         array( 'revision', 'page' ),
1065                         array( 'rev_id', 'rev_timestamp', 'page_is_redirect' ),
1066                         array(
1067                                 'page_id' => $this->getId(),
1068                                 'page_latest=rev_id' ),
1069                         __METHOD__ );
1070
1071                 if ( $row ) {
1072                         if ( wfTimestamp( TS_MW, $row->rev_timestamp ) >= $revision->getTimestamp() ) {
1073                                 wfProfileOut( __METHOD__ );
1074                                 return false;
1075                         }
1076                         $prev = $row->rev_id;
1077                         $lastRevIsRedirect = (bool)$row->page_is_redirect;
1078                 } else {
1079                         # No or missing previous revision; mark the page as new
1080                         $prev = 0;
1081                         $lastRevIsRedirect = null;
1082                 }
1083
1084                 $ret = $this->updateRevisionOn( $dbw, $revision, $prev, $lastRevIsRedirect );
1085
1086                 wfProfileOut( __METHOD__ );
1087                 return $ret;
1088         }
1089
1090         /**
1091          * @param $section empty/null/false or a section number (0, 1, 2, T1, T2...)
1092          * @param $text String: new text of the section
1093          * @param $sectionTitle String: new section's subject, only if $section is 'new'
1094          * @param $edittime String: revision timestamp or null to use the current revision
1095          * @return string Complete article text, or null if error
1096          */
1097         public function replaceSection( $section, $text, $sectionTitle = '', $edittime = null ) {
1098                 wfProfileIn( __METHOD__ );
1099
1100                 if ( strval( $section ) == '' ) {
1101                         // Whole-page edit; let the whole text through
1102                 } else {
1103                         // Bug 30711: always use current version when adding a new section
1104                         if ( is_null( $edittime ) || $section == 'new' ) {
1105                                 $oldtext = $this->getRawText();
1106                                 if ( $oldtext === false ) {
1107                                         wfDebug( __METHOD__ . ": no page text\n" );
1108                                         return null;
1109                                 }
1110                         } else {
1111                                 $dbw = wfGetDB( DB_MASTER );
1112                                 $rev = Revision::loadFromTimestamp( $dbw, $this->mTitle, $edittime );
1113
1114                                 if ( !$rev ) {
1115                                         wfDebug( "WikiPage::replaceSection asked for bogus section (page: " .
1116                                                 $this->getId() . "; section: $section; edittime: $edittime)\n" );
1117                                         wfProfileOut( __METHOD__ );
1118                                         return null;
1119                                 }
1120
1121                                 $oldtext = $rev->getText();
1122                         }
1123
1124                         if ( $section == 'new' ) {
1125                                 # Inserting a new section
1126                                 $subject = $sectionTitle ? wfMsgForContent( 'newsectionheaderdefaultlevel', $sectionTitle ) . "\n\n" : '';
1127                                 if ( wfRunHooks( 'PlaceNewSection', array( $this, $oldtext, $subject, &$text ) ) ) {
1128                                         $text = strlen( trim( $oldtext ) ) > 0
1129                                                 ? "{$oldtext}\n\n{$subject}{$text}"
1130                                                 : "{$subject}{$text}";
1131                                 }
1132                         } else {
1133                                 # Replacing an existing section; roll out the big guns
1134                                 global $wgParser;
1135
1136                                 $text = $wgParser->replaceSection( $oldtext, $section, $text );
1137                         }
1138                 }
1139
1140                 wfProfileOut( __METHOD__ );
1141                 return $text;
1142         }
1143
1144         /**
1145          * Check flags and add EDIT_NEW or EDIT_UPDATE to them as needed.
1146          * @param $flags Int
1147          * @return Int updated $flags
1148          */
1149         function checkFlags( $flags ) {
1150                 if ( !( $flags & EDIT_NEW ) && !( $flags & EDIT_UPDATE ) ) {
1151                         if ( $this->mTitle->getArticleID() ) {
1152                                 $flags |= EDIT_UPDATE;
1153                         } else {
1154                                 $flags |= EDIT_NEW;
1155                         }
1156                 }
1157
1158                 return $flags;
1159         }
1160
1161         /**
1162          * Change an existing article or create a new article. Updates RC and all necessary caches,
1163          * optionally via the deferred update array.
1164          *
1165          * @param $text String: new text
1166          * @param $summary String: edit summary
1167          * @param $flags Integer bitfield:
1168          *      EDIT_NEW
1169          *          Article is known or assumed to be non-existent, create a new one
1170          *      EDIT_UPDATE
1171          *          Article is known or assumed to be pre-existing, update it
1172          *      EDIT_MINOR
1173          *          Mark this edit minor, if the user is allowed to do so
1174          *      EDIT_SUPPRESS_RC
1175          *          Do not log the change in recentchanges
1176          *      EDIT_FORCE_BOT
1177          *          Mark the edit a "bot" edit regardless of user rights
1178          *      EDIT_DEFER_UPDATES
1179          *          Defer some of the updates until the end of index.php
1180          *      EDIT_AUTOSUMMARY
1181          *          Fill in blank summaries with generated text where possible
1182          *
1183          * If neither EDIT_NEW nor EDIT_UPDATE is specified, the status of the article will be detected.
1184          * If EDIT_UPDATE is specified and the article doesn't exist, the function will return an
1185          * edit-gone-missing error. If EDIT_NEW is specified and the article does exist, an
1186          * edit-already-exists error will be returned. These two conditions are also possible with
1187          * auto-detection due to MediaWiki's performance-optimised locking strategy.
1188          *
1189          * @param $baseRevId the revision ID this edit was based off, if any
1190          * @param $user User the user doing the edit
1191          *
1192          * @return Status object. Possible errors:
1193          *     edit-hook-aborted:       The ArticleSave hook aborted the edit but didn't set the fatal flag of $status
1194          *     edit-gone-missing:       In update mode, but the article didn't exist
1195          *     edit-conflict:           In update mode, the article changed unexpectedly
1196          *     edit-no-change:          Warning that the text was the same as before
1197          *     edit-already-exists:     In creation mode, but the article already exists
1198          *
1199          *  Extensions may define additional errors.
1200          *
1201          *  $return->value will contain an associative array with members as follows:
1202          *     new:                     Boolean indicating if the function attempted to create a new article
1203          *     revision:                The revision object for the inserted revision, or null
1204          *
1205          *  Compatibility note: this function previously returned a boolean value indicating success/failure
1206          */
1207         public function doEdit( $text, $summary, $flags = 0, $baseRevId = false, $user = null ) {
1208                 global $wgUser, $wgDBtransactions, $wgUseAutomaticEditSummaries;
1209
1210                 # Low-level sanity check
1211                 if ( $this->mTitle->getText() === '' ) {
1212                         throw new MWException( 'Something is trying to edit an article with an empty title' );
1213                 }
1214
1215                 wfProfileIn( __METHOD__ );
1216
1217                 $user = is_null( $user ) ? $wgUser : $user;
1218                 $status = Status::newGood( array() );
1219
1220                 # Load $this->mTitle->getArticleID() and $this->mLatest if it's not already
1221                 $this->loadPageData( 'fromdbmaster' );
1222
1223                 $flags = $this->checkFlags( $flags );
1224
1225                 if ( !wfRunHooks( 'ArticleSave', array( &$this, &$user, &$text, &$summary,
1226                         $flags & EDIT_MINOR, null, null, &$flags, &$status ) ) )
1227                 {
1228                         wfDebug( __METHOD__ . ": ArticleSave hook aborted save!\n" );
1229
1230                         if ( $status->isOK() ) {
1231                                 $status->fatal( 'edit-hook-aborted' );
1232                         }
1233
1234                         wfProfileOut( __METHOD__ );
1235                         return $status;
1236                 }
1237
1238                 # Silently ignore EDIT_MINOR if not allowed
1239                 $isminor = ( $flags & EDIT_MINOR ) && $user->isAllowed( 'minoredit' );
1240                 $bot = $flags & EDIT_FORCE_BOT;
1241
1242                 $oldtext = $this->getRawText(); // current revision
1243                 $oldsize = strlen( $oldtext );
1244                 $oldid = $this->getLatest();
1245                 $oldIsRedirect = $this->isRedirect();
1246                 $oldcountable = $this->isCountable();
1247
1248                 # Provide autosummaries if one is not provided and autosummaries are enabled.
1249                 if ( $wgUseAutomaticEditSummaries && $flags & EDIT_AUTOSUMMARY && $summary == '' ) {
1250                         $summary = self::getAutosummary( $oldtext, $text, $flags );
1251                 }
1252
1253                 $editInfo = $this->prepareTextForEdit( $text, null, $user );
1254                 $text = $editInfo->pst;
1255                 $newsize = strlen( $text );
1256
1257                 $dbw = wfGetDB( DB_MASTER );
1258                 $now = wfTimestampNow();
1259                 $this->mTimestamp = $now;
1260
1261                 if ( $flags & EDIT_UPDATE ) {
1262                         # Update article, but only if changed.
1263                         $status->value['new'] = false;
1264
1265                         # Make sure the revision is either completely inserted or not inserted at all
1266                         if ( !$wgDBtransactions ) {
1267                                 $userAbort = ignore_user_abort( true );
1268                         }
1269
1270                         $revision = new Revision( array(
1271                                 'page'       => $this->getId(),
1272                                 'comment'    => $summary,
1273                                 'minor_edit' => $isminor,
1274                                 'text'       => $text,
1275                                 'parent_id'  => $oldid,
1276                                 'user'       => $user->getId(),
1277                                 'user_text'  => $user->getName(),
1278                                 'timestamp'  => $now
1279                         ) );
1280
1281                         $changed = ( strcmp( $text, $oldtext ) != 0 );
1282
1283                         if ( $changed ) {
1284                                 if ( !$this->mLatest ) {
1285                                         # Article gone missing
1286                                         wfDebug( __METHOD__ . ": EDIT_UPDATE specified but article doesn't exist\n" );
1287                                         $status->fatal( 'edit-gone-missing' );
1288
1289                                         wfProfileOut( __METHOD__ );
1290                                         return $status;
1291                                 }
1292
1293                                 $dbw->begin();
1294                                 $revisionId = $revision->insertOn( $dbw );
1295
1296                                 # Update page
1297                                 #
1298                                 # Note that we use $this->mLatest instead of fetching a value from the master DB
1299                                 # during the course of this function. This makes sure that EditPage can detect
1300                                 # edit conflicts reliably, either by $ok here, or by $article->getTimestamp()
1301                                 # before this function is called. A previous function used a separate query, this
1302                                 # creates a window where concurrent edits can cause an ignored edit conflict.
1303                                 $ok = $this->updateRevisionOn( $dbw, $revision, $oldid, $oldIsRedirect );
1304
1305                                 if ( !$ok ) {
1306                                         /* Belated edit conflict! Run away!! */
1307                                         $status->fatal( 'edit-conflict' );
1308
1309                                         # Delete the invalid revision if the DB is not transactional
1310                                         if ( !$wgDBtransactions ) {
1311                                                 $dbw->delete( 'revision', array( 'rev_id' => $revisionId ), __METHOD__ );
1312                                         }
1313
1314                                         $revisionId = 0;
1315                                         $dbw->rollback();
1316                                 } else {
1317                                         global $wgUseRCPatrol;
1318                                         wfRunHooks( 'NewRevisionFromEditComplete', array( $this, $revision, $baseRevId, $user ) );
1319                                         # Update recentchanges
1320                                         if ( !( $flags & EDIT_SUPPRESS_RC ) ) {
1321                                                 # Mark as patrolled if the user can do so
1322                                                 $patrolled = $wgUseRCPatrol && !count(
1323                                                         $this->mTitle->getUserPermissionsErrors( 'autopatrol', $user ) );
1324                                                 # Add RC row to the DB
1325                                                 $rc = RecentChange::notifyEdit( $now, $this->mTitle, $isminor, $user, $summary,
1326                                                         $oldid, $this->getTimestamp(), $bot, '', $oldsize, $newsize,
1327                                                         $revisionId, $patrolled
1328                                                 );
1329
1330                                                 # Log auto-patrolled edits
1331                                                 if ( $patrolled ) {
1332                                                         PatrolLog::record( $rc, true );
1333                                                 }
1334                                         }
1335                                         $user->incEditCount();
1336                                         $dbw->commit();
1337                                 }
1338                         }
1339
1340                         if ( !$wgDBtransactions ) {
1341                                 ignore_user_abort( $userAbort );
1342                         }
1343
1344                         // Now that ignore_user_abort is restored, we can respond to fatal errors
1345                         if ( !$status->isOK() ) {
1346                                 wfProfileOut( __METHOD__ );
1347                                 return $status;
1348                         }
1349
1350                         # Update links tables, site stats, etc.
1351                         $this->doEditUpdates( $revision, $user, array( 'changed' => $changed,
1352                                 'oldcountable' => $oldcountable ) );
1353
1354                         if ( !$changed ) {
1355                                 $status->warning( 'edit-no-change' );
1356                                 $revision = null;
1357                                 // Keep the same revision ID, but do some updates on it
1358                                 $revisionId = $this->getLatest();
1359                                 // Update page_touched, this is usually implicit in the page update
1360                                 // Other cache updates are done in onArticleEdit()
1361                                 $this->mTitle->invalidateCache();
1362                         }
1363                 } else {
1364                         # Create new article
1365                         $status->value['new'] = true;
1366
1367                         $dbw->begin();
1368
1369                         # Add the page record; stake our claim on this title!
1370                         # This will return false if the article already exists
1371                         $newid = $this->insertOn( $dbw );
1372
1373                         if ( $newid === false ) {
1374                                 $dbw->rollback();
1375                                 $status->fatal( 'edit-already-exists' );
1376
1377                                 wfProfileOut( __METHOD__ );
1378                                 return $status;
1379                         }
1380
1381                         # Save the revision text...
1382                         $revision = new Revision( array(
1383                                 'page'       => $newid,
1384                                 'comment'    => $summary,
1385                                 'minor_edit' => $isminor,
1386                                 'text'       => $text,
1387                                 'user'       => $user->getId(),
1388                                 'user_text'  => $user->getName(),
1389                                 'timestamp'  => $now
1390                         ) );
1391                         $revisionId = $revision->insertOn( $dbw );
1392
1393                         # Update the page record with revision data
1394                         $this->updateRevisionOn( $dbw, $revision, 0 );
1395
1396                         wfRunHooks( 'NewRevisionFromEditComplete', array( $this, $revision, false, $user ) );
1397
1398                         # Update recentchanges
1399                         if ( !( $flags & EDIT_SUPPRESS_RC ) ) {
1400                                 global $wgUseRCPatrol, $wgUseNPPatrol;
1401
1402                                 # Mark as patrolled if the user can do so
1403                                 $patrolled = ( $wgUseRCPatrol || $wgUseNPPatrol ) && !count(
1404                                         $this->mTitle->getUserPermissionsErrors( 'autopatrol', $user ) );
1405                                 # Add RC row to the DB
1406                                 $rc = RecentChange::notifyNew( $now, $this->mTitle, $isminor, $user, $summary, $bot,
1407                                         '', strlen( $text ), $revisionId, $patrolled );
1408
1409                                 # Log auto-patrolled edits
1410                                 if ( $patrolled ) {
1411                                         PatrolLog::record( $rc, true );
1412                                 }
1413                         }
1414                         $user->incEditCount();
1415                         $dbw->commit();
1416
1417                         # Update links, etc.
1418                         $this->doEditUpdates( $revision, $user, array( 'created' => true ) );
1419
1420                         wfRunHooks( 'ArticleInsertComplete', array( &$this, &$user, $text, $summary,
1421                                 $flags & EDIT_MINOR, null, null, &$flags, $revision ) );
1422                 }
1423
1424                 # Do updates right now unless deferral was requested
1425                 if ( !( $flags & EDIT_DEFER_UPDATES ) ) {
1426                         DeferredUpdates::doUpdates();
1427                 }
1428
1429                 // Return the new revision (or null) to the caller
1430                 $status->value['revision'] = $revision;
1431
1432                 wfRunHooks( 'ArticleSaveComplete', array( &$this, &$user, $text, $summary,
1433                         $flags & EDIT_MINOR, null, null, &$flags, $revision, &$status, $baseRevId ) );
1434
1435                 # Promote user to any groups they meet the criteria for
1436                 $user->addAutopromoteOnceGroups( 'onEdit' );
1437
1438                 wfProfileOut( __METHOD__ );
1439                 return $status;
1440         }
1441
1442         /**
1443          * Get parser options suitable for rendering the primary article wikitext
1444          * @param User|string $user User object or 'canonical'
1445          * @return ParserOptions
1446          */
1447         public function makeParserOptions( $user ) {
1448                 global $wgContLang;
1449                 if ( $user instanceof User ) { // settings per user (even anons)
1450                         $options = ParserOptions::newFromUser( $user );
1451                 } else { // canonical settings
1452                         $options = ParserOptions::newFromUserAndLang( new User, $wgContLang );
1453                 }
1454                 $options->enableLimitReport(); // show inclusion/loop reports
1455                 $options->setTidy( true ); // fix bad HTML
1456                 return $options;
1457         }
1458
1459         /**
1460          * Prepare text which is about to be saved.
1461          * Returns a stdclass with source, pst and output members
1462          */
1463         public function prepareTextForEdit( $text, $revid = null, User $user = null ) {
1464                 global $wgParser, $wgContLang, $wgUser;
1465                 $user = is_null( $user ) ? $wgUser : $user;
1466                 // @TODO fixme: check $user->getId() here???
1467                 if ( $this->mPreparedEdit
1468                         && $this->mPreparedEdit->newText == $text
1469                         && $this->mPreparedEdit->revid == $revid
1470                 ) {
1471                         // Already prepared
1472                         return $this->mPreparedEdit;
1473                 }
1474
1475                 $popts = ParserOptions::newFromUserAndLang( $user, $wgContLang );
1476                 wfRunHooks( 'ArticlePrepareTextForEdit', array( $this, $popts ) );
1477
1478                 $edit = (object)array();
1479                 $edit->revid = $revid;
1480                 $edit->newText = $text;
1481                 $edit->pst = $wgParser->preSaveTransform( $text, $this->mTitle, $user, $popts );
1482                 $edit->popts = $this->makeParserOptions( 'canonical' );
1483                 $edit->output = $wgParser->parse( $edit->pst, $this->mTitle, $edit->popts, true, true, $revid );
1484                 $edit->oldText = $this->getRawText();
1485
1486                 $this->mPreparedEdit = $edit;
1487
1488                 return $edit;
1489         }
1490
1491         /**
1492          * Do standard deferred updates after page edit.
1493          * Update links tables, site stats, search index and message cache.
1494          * Purges pages that include this page if the text was changed here.
1495          * Every 100th edit, prune the recent changes table.
1496          *
1497          * @private
1498          * @param $revision Revision object
1499          * @param $user User object that did the revision
1500          * @param $options Array of options, following indexes are used:
1501          * - changed: boolean, whether the revision changed the content (default true)
1502          * - created: boolean, whether the revision created the page (default false)
1503          * - oldcountable: boolean or null (default null):
1504          *   - boolean: whether the page was counted as an article before that
1505          *     revision, only used in changed is true and created is false
1506          *   - null: don't change the article count
1507          */
1508         public function doEditUpdates( Revision $revision, User $user, array $options = array() ) {
1509                 global $wgEnableParserCache;
1510
1511                 wfProfileIn( __METHOD__ );
1512
1513                 $options += array( 'changed' => true, 'created' => false, 'oldcountable' => null );
1514                 $text = $revision->getText();
1515
1516                 # Parse the text
1517                 # Be careful not to double-PST: $text is usually already PST-ed once
1518                 if ( !$this->mPreparedEdit || $this->mPreparedEdit->output->getFlag( 'vary-revision' ) ) {
1519                         wfDebug( __METHOD__ . ": No prepared edit or vary-revision is set...\n" );
1520                         $editInfo = $this->prepareTextForEdit( $text, $revision->getId(), $user );
1521                 } else {
1522                         wfDebug( __METHOD__ . ": No vary-revision, using prepared edit...\n" );
1523                         $editInfo = $this->mPreparedEdit;
1524                 }
1525
1526                 # Save it to the parser cache
1527                 if ( $wgEnableParserCache ) {
1528                         $parserCache = ParserCache::singleton();
1529                         $parserCache->save( $editInfo->output, $this, $editInfo->popts );
1530                 }
1531
1532                 # Update the links tables
1533                 $u = new LinksUpdate( $this->mTitle, $editInfo->output );
1534                 $u->doUpdate();
1535
1536                 wfRunHooks( 'ArticleEditUpdates', array( &$this, &$editInfo, $options['changed'] ) );
1537
1538                 if ( wfRunHooks( 'ArticleEditUpdatesDeleteFromRecentchanges', array( &$this ) ) ) {
1539                         if ( 0 == mt_rand( 0, 99 ) ) {
1540                                 // Flush old entries from the `recentchanges` table; we do this on
1541                                 // random requests so as to avoid an increase in writes for no good reason
1542                                 global $wgRCMaxAge;
1543
1544                                 $dbw = wfGetDB( DB_MASTER );
1545                                 $cutoff = $dbw->timestamp( time() - $wgRCMaxAge );
1546                                 $dbw->delete(
1547                                         'recentchanges',
1548                                         array( "rc_timestamp < '$cutoff'" ),
1549                                         __METHOD__
1550                                 );
1551                         }
1552                 }
1553
1554                 if ( !$this->mTitle->exists() ) {
1555                         wfProfileOut( __METHOD__ );
1556                         return;
1557                 }
1558
1559                 $id = $this->getId();
1560                 $title = $this->mTitle->getPrefixedDBkey();
1561                 $shortTitle = $this->mTitle->getDBkey();
1562
1563                 if ( !$options['changed'] ) {
1564                         $good = 0;
1565                         $total = 0;
1566                 } elseif ( $options['created'] ) {
1567                         $good = (int)$this->isCountable( $editInfo );
1568                         $total = 1;
1569                 } elseif ( $options['oldcountable'] !== null ) {
1570                         $good = (int)$this->isCountable( $editInfo ) - (int)$options['oldcountable'];
1571                         $total = 0;
1572                 } else {
1573                         $good = 0;
1574                         $total = 0;
1575                 }
1576
1577                 DeferredUpdates::addUpdate( new SiteStatsUpdate( 0, 1, $good, $total ) );
1578                 DeferredUpdates::addUpdate( new SearchUpdate( $id, $title, $text ) );
1579
1580                 # If this is another user's talk page, update newtalk.
1581                 # Don't do this if $options['changed'] = false (null-edits) nor if
1582                 # it's a minor edit and the user doesn't want notifications for those.
1583                 if ( $options['changed']
1584                         && $this->mTitle->getNamespace() == NS_USER_TALK
1585                         && $shortTitle != $user->getTitleKey()
1586                         && !( $revision->isMinor() && $user->isAllowed( 'nominornewtalk' ) )
1587                 ) {
1588                         if ( wfRunHooks( 'ArticleEditUpdateNewTalk', array( &$this ) ) ) {
1589                                 $other = User::newFromName( $shortTitle, false );
1590                                 if ( !$other ) {
1591                                         wfDebug( __METHOD__ . ": invalid username\n" );
1592                                 } elseif ( User::isIP( $shortTitle ) ) {
1593                                         // An anonymous user
1594                                         $other->setNewtalk( true );
1595                                 } elseif ( $other->isLoggedIn() ) {
1596                                         $other->setNewtalk( true );
1597                                 } else {
1598                                         wfDebug( __METHOD__ . ": don't need to notify a nonexistent user\n" );
1599                                 }
1600                         }
1601                 }
1602
1603                 if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
1604                         MessageCache::singleton()->replace( $shortTitle, $text );
1605                 }
1606
1607                 if( $options['created'] ) {
1608                         self::onArticleCreate( $this->mTitle );
1609                 } else {
1610                         self::onArticleEdit( $this->mTitle );
1611                 }
1612
1613                 wfProfileOut( __METHOD__ );
1614         }
1615
1616         /**
1617          * Edit an article without doing all that other stuff
1618          * The article must already exist; link tables etc
1619          * are not updated, caches are not flushed.
1620          *
1621          * @param $text String: text submitted
1622          * @param $user User The relevant user
1623          * @param $comment String: comment submitted
1624          * @param $minor Boolean: whereas it's a minor modification
1625          */
1626         public function doQuickEdit( $text, User $user, $comment = '', $minor = 0 ) {
1627                 wfProfileIn( __METHOD__ );
1628
1629                 $dbw = wfGetDB( DB_MASTER );
1630                 $revision = new Revision( array(
1631                         'page'       => $this->getId(),
1632                         'text'       => $text,
1633                         'comment'    => $comment,
1634                         'minor_edit' => $minor ? 1 : 0,
1635                 ) );
1636                 $revision->insertOn( $dbw );
1637                 $this->updateRevisionOn( $dbw, $revision );
1638
1639                 wfRunHooks( 'NewRevisionFromEditComplete', array( $this, $revision, false, $user ) );
1640
1641                 wfProfileOut( __METHOD__ );
1642         }
1643
1644         /**
1645          * Update the article's restriction field, and leave a log entry.
1646          * This works for protection both existing and non-existing pages.
1647          *
1648          * @param $limit Array: set of restriction keys
1649          * @param $reason String
1650          * @param &$cascade Integer. Set to false if cascading protection isn't allowed.
1651          * @param $expiry Array: per restriction type expiration
1652          * @param $user User The user updating the restrictions
1653          * @return bool true on success
1654          */
1655         public function doUpdateRestrictions( array $limit, array $expiry, &$cascade, $reason, User $user ) {
1656                 global $wgContLang;
1657
1658                 if ( wfReadOnly() ) {
1659                         return Status::newFatal( 'readonlytext', wfReadOnlyReason() );
1660                 }
1661
1662                 $restrictionTypes = $this->mTitle->getRestrictionTypes();
1663
1664                 $id = $this->mTitle->getArticleID();
1665
1666                 if ( !$cascade ) {
1667                         $cascade = false;
1668                 }
1669
1670                 // Take this opportunity to purge out expired restrictions
1671                 Title::purgeExpiredRestrictions();
1672
1673                 # @todo FIXME: Same limitations as described in ProtectionForm.php (line 37);
1674                 # we expect a single selection, but the schema allows otherwise.
1675                 $isProtected = false;
1676                 $protect = false;
1677                 $changed = false;
1678
1679                 $dbw = wfGetDB( DB_MASTER );
1680
1681                 foreach ( $restrictionTypes as $action ) {
1682                         if ( !isset( $expiry[$action] ) ) {
1683                                 $expiry[$action] = $dbw->getInfinity();
1684                         }
1685                         if ( !isset( $limit[$action] ) ) {
1686                                 $limit[$action] = '';
1687                         } elseif ( $limit[$action] != '' ) {
1688                                 $protect = true;
1689                         }
1690
1691                         # Get current restrictions on $action
1692                         $current = implode( '', $this->mTitle->getRestrictions( $action ) );
1693                         if ( $current != '' ) {
1694                                 $isProtected = true;
1695                         }
1696
1697                         if ( $limit[$action] != $current ) {
1698                                 $changed = true;
1699                         } elseif ( $limit[$action] != '' ) {
1700                                 # Only check expiry change if the action is actually being
1701                                 # protected, since expiry does nothing on an not-protected
1702                                 # action.
1703                                 if ( $this->mTitle->getRestrictionExpiry( $action ) != $expiry[$action] ) {
1704                                         $changed = true;
1705                                 }
1706                         }
1707                 }
1708
1709                 if ( !$changed && $protect && $this->mTitle->areRestrictionsCascading() != $cascade ) {
1710                         $changed = true;
1711                 }
1712
1713                 # If nothing's changed, do nothing
1714                 if ( !$changed ) {
1715                         return Status::newGood();
1716                 }
1717
1718                 if ( !$protect ) { # No protection at all means unprotection
1719                         $revCommentMsg = 'unprotectedarticle';
1720                         $logAction = 'unprotect';
1721                 } elseif ( $isProtected ) {
1722                         $revCommentMsg = 'modifiedarticleprotection';
1723                         $logAction = 'modify';
1724                 } else {
1725                         $revCommentMsg = 'protectedarticle';
1726                         $logAction = 'protect';
1727                 }
1728
1729                 $encodedExpiry = array();
1730                 $protectDescription = '';
1731                 foreach ( $limit as $action => $restrictions ) {
1732                         $encodedExpiry[$action] = $dbw->encodeExpiry( $expiry[$action] );
1733                         if ( $restrictions != '' ) {
1734                                 $protectDescription .= $wgContLang->getDirMark() . "[$action=$restrictions] (";
1735                                 if ( $encodedExpiry[$action] != 'infinity' ) {
1736                                         $protectDescription .= wfMsgForContent( 'protect-expiring',
1737                                                 $wgContLang->timeanddate( $expiry[$action], false, false ) ,
1738                                                 $wgContLang->date( $expiry[$action], false, false ) ,
1739                                                 $wgContLang->time( $expiry[$action], false, false ) );
1740                                 } else {
1741                                         $protectDescription .= wfMsgForContent( 'protect-expiry-indefinite' );
1742                                 }
1743
1744                                 $protectDescription .= ') ';
1745                         }
1746                 }
1747                 $protectDescription = trim( $protectDescription );
1748
1749                 if ( $id ) { # Protection of existing page
1750                         if ( !wfRunHooks( 'ArticleProtect', array( &$this, &$user, $limit, $reason ) ) ) {
1751                                 return Status::newGood();
1752                         }
1753
1754                         # Only restrictions with the 'protect' right can cascade...
1755                         # Otherwise, people who cannot normally protect can "protect" pages via transclusion
1756                         $editrestriction = isset( $limit['edit'] ) ? array( $limit['edit'] ) : $this->mTitle->getRestrictions( 'edit' );
1757
1758                         # The schema allows multiple restrictions
1759                         if ( !in_array( 'protect', $editrestriction ) && !in_array( 'sysop', $editrestriction ) ) {
1760                                 $cascade = false;
1761                         }
1762
1763                         # Update restrictions table
1764                         foreach ( $limit as $action => $restrictions ) {
1765                                 if ( $restrictions != '' ) {
1766                                         $dbw->replace( 'page_restrictions', array( array( 'pr_page', 'pr_type' ) ),
1767                                                 array( 'pr_page' => $id,
1768                                                         'pr_type' => $action,
1769                                                         'pr_level' => $restrictions,
1770                                                         'pr_cascade' => ( $cascade && $action == 'edit' ) ? 1 : 0,
1771                                                         'pr_expiry' => $encodedExpiry[$action]
1772                                                 ),
1773                                                 __METHOD__
1774                                         );
1775                                 } else {
1776                                         $dbw->delete( 'page_restrictions', array( 'pr_page' => $id,
1777                                                 'pr_type' => $action ), __METHOD__ );
1778                                 }
1779                         }
1780
1781                         # Prepare a null revision to be added to the history
1782                         $editComment = $wgContLang->ucfirst( wfMsgForContent( $revCommentMsg, $this->mTitle->getPrefixedText() ) );
1783                         if ( $reason ) {
1784                                 $editComment .= ": $reason";
1785                         }
1786                         if ( $protectDescription ) {
1787                                 $editComment .= " ($protectDescription)";
1788                         }
1789                         if ( $cascade ) {
1790                                 $editComment .= ' [' . wfMsgForContent( 'protect-summary-cascade' ) . ']';
1791                         }
1792
1793                         # Insert a null revision
1794                         $nullRevision = Revision::newNullRevision( $dbw, $id, $editComment, true );
1795                         $nullRevId = $nullRevision->insertOn( $dbw );
1796
1797                         $latest = $this->getLatest();
1798                         # Update page record
1799                         $dbw->update( 'page',
1800                                 array( /* SET */
1801                                         'page_touched' => $dbw->timestamp(),
1802                                         'page_restrictions' => '',
1803                                         'page_latest' => $nullRevId
1804                                 ), array( /* WHERE */
1805                                         'page_id' => $id
1806                                 ), __METHOD__
1807                         );
1808
1809                         wfRunHooks( 'NewRevisionFromEditComplete', array( $this, $nullRevision, $latest, $user ) );
1810                         wfRunHooks( 'ArticleProtectComplete', array( &$this, &$user, $limit, $reason ) );
1811                 } else { # Protection of non-existing page (also known as "title protection")
1812                         # Cascade protection is meaningless in this case
1813                         $cascade = false;
1814
1815                         if ( $limit['create'] != '' ) {
1816                                 $dbw->replace( 'protected_titles',
1817                                         array( array( 'pt_namespace', 'pt_title' ) ),
1818                                         array(
1819                                                 'pt_namespace' => $this->mTitle->getNamespace(),
1820                                                 'pt_title' => $this->mTitle->getDBkey(),
1821                                                 'pt_create_perm' => $limit['create'],
1822                                                 'pt_timestamp' => $dbw->encodeExpiry( wfTimestampNow() ),
1823                                                 'pt_expiry' => $encodedExpiry['create'],
1824                                                 'pt_user' => $user->getId(),
1825                                                 'pt_reason' => $reason,
1826                                         ), __METHOD__
1827                                 );
1828                         } else {
1829                                 $dbw->delete( 'protected_titles',
1830                                         array(
1831                                                 'pt_namespace' => $this->mTitle->getNamespace(),
1832                                                 'pt_title' => $this->mTitle->getDBkey()
1833                                         ), __METHOD__
1834                                 );
1835                         }
1836                 }
1837
1838                 $this->mTitle->flushRestrictions();
1839
1840                 if ( $logAction == 'unprotect' ) {
1841                         $logParams = array();
1842                 } else {
1843                         $logParams = array( $protectDescription, $cascade ? 'cascade' : '' );
1844                 }
1845
1846                 # Update the protection log
1847                 $log = new LogPage( 'protect' );
1848                 $log->addEntry( $logAction, $this->mTitle, trim( $reason ), $logParams, $user );
1849
1850                 return Status::newGood();
1851         }
1852
1853         /**
1854          * Take an array of page restrictions and flatten it to a string
1855          * suitable for insertion into the page_restrictions field.
1856          * @param $limit Array
1857          * @return String
1858          */
1859         protected static function flattenRestrictions( $limit ) {
1860                 if ( !is_array( $limit ) ) {
1861                         throw new MWException( 'WikiPage::flattenRestrictions given non-array restriction set' );
1862                 }
1863
1864                 $bits = array();
1865                 ksort( $limit );
1866
1867                 foreach ( $limit as $action => $restrictions ) {
1868                         if ( $restrictions != '' ) {
1869                                 $bits[] = "$action=$restrictions";
1870                         }
1871                 }
1872
1873                 return implode( ':', $bits );
1874         }
1875
1876         /**
1877          * Back-end article deletion
1878          * Deletes the article with database consistency, writes logs, purges caches
1879          *
1880          * @param $reason string delete reason for deletion log
1881          * @param $suppress bitfield
1882          *      Revision::DELETED_TEXT
1883          *      Revision::DELETED_COMMENT
1884          *      Revision::DELETED_USER
1885          *      Revision::DELETED_RESTRICTED
1886          * @param $id int article ID
1887          * @param $commit boolean defaults to true, triggers transaction end
1888          * @param &$errors Array of errors to append to
1889          * @param $user User The relevant user
1890          * @return boolean true if successful
1891          */
1892         public function doDeleteArticle(
1893                 $reason, $suppress = false, $id = 0, $commit = true, &$error = '', User $user = null
1894         ) {
1895                 global $wgUser;
1896                 $user = is_null( $user ) ? $wgUser : $user;
1897
1898                 wfDebug( __METHOD__ . "\n" );
1899
1900                 if ( ! wfRunHooks( 'ArticleDelete', array( &$this, &$user, &$reason, &$error ) ) ) {
1901                         return false;
1902                 }
1903                 $dbw = wfGetDB( DB_MASTER );
1904                 $t = $this->mTitle->getDBkey();
1905                 $id = $id ? $id : $this->mTitle->getArticleID( Title::GAID_FOR_UPDATE );
1906
1907                 if ( $t === '' || $id == 0 ) {
1908                         return false;
1909                 }
1910
1911                 // Bitfields to further suppress the content
1912                 if ( $suppress ) {
1913                         $bitfield = 0;
1914                         // This should be 15...
1915                         $bitfield |= Revision::DELETED_TEXT;
1916                         $bitfield |= Revision::DELETED_COMMENT;
1917                         $bitfield |= Revision::DELETED_USER;
1918                         $bitfield |= Revision::DELETED_RESTRICTED;
1919                 } else {
1920                         $bitfield = 'rev_deleted';
1921                 }
1922
1923                 $dbw->begin();
1924                 // For now, shunt the revision data into the archive table.
1925                 // Text is *not* removed from the text table; bulk storage
1926                 // is left intact to avoid breaking block-compression or
1927                 // immutable storage schemes.
1928                 //
1929                 // For backwards compatibility, note that some older archive
1930                 // table entries will have ar_text and ar_flags fields still.
1931                 //
1932                 // In the future, we may keep revisions and mark them with
1933                 // the rev_deleted field, which is reserved for this purpose.
1934                 $dbw->insertSelect( 'archive', array( 'page', 'revision' ),
1935                         array(
1936                                 'ar_namespace'  => 'page_namespace',
1937                                 'ar_title'      => 'page_title',
1938                                 'ar_comment'    => 'rev_comment',
1939                                 'ar_user'       => 'rev_user',
1940                                 'ar_user_text'  => 'rev_user_text',
1941                                 'ar_timestamp'  => 'rev_timestamp',
1942                                 'ar_minor_edit' => 'rev_minor_edit',
1943                                 'ar_rev_id'     => 'rev_id',
1944                                 'ar_parent_id'  => 'rev_parent_id',
1945                                 'ar_text_id'    => 'rev_text_id',
1946                                 'ar_text'       => '\'\'', // Be explicit to appease
1947                                 'ar_flags'      => '\'\'', // MySQL's "strict mode"...
1948                                 'ar_len'        => 'rev_len',
1949                                 'ar_page_id'    => 'page_id',
1950                                 'ar_deleted'    => $bitfield,
1951                                 'ar_sha1'       => 'rev_sha1'
1952                         ), array(
1953                                 'page_id' => $id,
1954                                 'page_id = rev_page'
1955                         ), __METHOD__
1956                 );
1957
1958                 # Now that it's safely backed up, delete it
1959                 $dbw->delete( 'page', array( 'page_id' => $id ), __METHOD__ );
1960                 $ok = ( $dbw->affectedRows() > 0 ); // getArticleId() uses slave, could be laggy
1961
1962                 if ( !$ok ) {
1963                         $dbw->rollback();
1964                         return false;
1965                 }
1966
1967                 $this->doDeleteUpdates( $id );
1968
1969                 # Log the deletion, if the page was suppressed, log it at Oversight instead
1970                 $logtype = $suppress ? 'suppress' : 'delete';
1971
1972                 $logEntry = new ManualLogEntry( $logtype, 'delete' );
1973                 $logEntry->setPerformer( $user );
1974                 $logEntry->setTarget( $this->mTitle );
1975                 $logEntry->setComment( $reason );
1976                 $logid = $logEntry->insert();
1977                 $logEntry->publish( $logid );
1978
1979                 if ( $commit ) {
1980                         $dbw->commit();
1981                 }
1982
1983                 wfRunHooks( 'ArticleDeleteComplete', array( &$this, &$user, $reason, $id ) );
1984                 return true;
1985         }
1986
1987         /**
1988          * Do some database updates after deletion
1989          *
1990          * @param $id Int: page_id value of the page being deleted
1991          */
1992         public function doDeleteUpdates( $id ) {
1993                 DeferredUpdates::addUpdate( new SiteStatsUpdate( 0, 1, - (int)$this->isCountable(), -1 ) );
1994
1995                 $dbw = wfGetDB( DB_MASTER );
1996
1997                 # Delete restrictions for it
1998                 $dbw->delete( 'page_restrictions', array ( 'pr_page' => $id ), __METHOD__ );
1999
2000                 # Fix category table counts
2001                 $cats = array();
2002                 $res = $dbw->select( 'categorylinks', 'cl_to', array( 'cl_from' => $id ), __METHOD__ );
2003
2004                 foreach ( $res as $row ) {
2005                         $cats [] = $row->cl_to;
2006                 }
2007
2008                 $this->updateCategoryCounts( array(), $cats );
2009
2010                 # If using cascading deletes, we can skip some explicit deletes
2011                 if ( !$dbw->cascadingDeletes() ) {
2012                         $dbw->delete( 'revision', array( 'rev_page' => $id ), __METHOD__ );
2013
2014                         # Delete outgoing links
2015                         $dbw->delete( 'pagelinks', array( 'pl_from' => $id ), __METHOD__ );
2016                         $dbw->delete( 'imagelinks', array( 'il_from' => $id ), __METHOD__ );
2017                         $dbw->delete( 'categorylinks', array( 'cl_from' => $id ), __METHOD__ );
2018                         $dbw->delete( 'templatelinks', array( 'tl_from' => $id ), __METHOD__ );
2019                         $dbw->delete( 'externallinks', array( 'el_from' => $id ), __METHOD__ );
2020                         $dbw->delete( 'langlinks', array( 'll_from' => $id ), __METHOD__ );
2021                         $dbw->delete( 'iwlinks', array( 'iwl_from' => $id ), __METHOD__ );
2022                         $dbw->delete( 'redirect', array( 'rd_from' => $id ), __METHOD__ );
2023                         $dbw->delete( 'page_props', array( 'pp_page' => $id ), __METHOD__ );
2024                 }
2025
2026                 # If using cleanup triggers, we can skip some manual deletes
2027                 if ( !$dbw->cleanupTriggers() ) {
2028                         # Clean up recentchanges entries...
2029                         $dbw->delete( 'recentchanges',
2030                                 array( 'rc_type != ' . RC_LOG,
2031                                         'rc_namespace' => $this->mTitle->getNamespace(),
2032                                         'rc_title' => $this->mTitle->getDBkey() ),
2033                                 __METHOD__ );
2034                         $dbw->delete( 'recentchanges',
2035                                 array( 'rc_type != ' . RC_LOG, 'rc_cur_id' => $id ),
2036                                 __METHOD__ );
2037                 }
2038
2039                 # Clear caches
2040                 self::onArticleDelete( $this->mTitle );
2041
2042                 # Clear the cached article id so the interface doesn't act like we exist
2043                 $this->mTitle->resetArticleID( 0 );
2044         }
2045
2046         /**
2047          * Roll back the most recent consecutive set of edits to a page
2048          * from the same user; fails if there are no eligible edits to
2049          * roll back to, e.g. user is the sole contributor. This function
2050          * performs permissions checks on $user, then calls commitRollback()
2051          * to do the dirty work
2052          *
2053          * @todo: seperate the business/permission stuff out from backend code
2054          *
2055          * @param $fromP String: Name of the user whose edits to rollback.
2056          * @param $summary String: Custom summary. Set to default summary if empty.
2057          * @param $token String: Rollback token.
2058          * @param $bot Boolean: If true, mark all reverted edits as bot.
2059          *
2060          * @param $resultDetails Array: contains result-specific array of additional values
2061          *    'alreadyrolled' : 'current' (rev)
2062          *    success        : 'summary' (str), 'current' (rev), 'target' (rev)
2063          *
2064          * @param $user User The user performing the rollback
2065          * @return array of errors, each error formatted as
2066          *   array(messagekey, param1, param2, ...).
2067          * On success, the array is empty.  This array can also be passed to
2068          * OutputPage::showPermissionsErrorPage().
2069          */
2070         public function doRollback(
2071                 $fromP, $summary, $token, $bot, &$resultDetails, User $user
2072         ) {
2073                 $resultDetails = null;
2074
2075                 # Check permissions
2076                 $editErrors = $this->mTitle->getUserPermissionsErrors( 'edit', $user );
2077                 $rollbackErrors = $this->mTitle->getUserPermissionsErrors( 'rollback', $user );
2078                 $errors = array_merge( $editErrors, wfArrayDiff2( $rollbackErrors, $editErrors ) );
2079
2080                 if ( !$user->matchEditToken( $token, array( $this->mTitle->getPrefixedText(), $fromP ) ) ) {
2081                         $errors[] = array( 'sessionfailure' );
2082                 }
2083
2084                 if ( $user->pingLimiter( 'rollback' ) || $user->pingLimiter() ) {
2085                         $errors[] = array( 'actionthrottledtext' );
2086                 }
2087
2088                 # If there were errors, bail out now
2089                 if ( !empty( $errors ) ) {
2090                         return $errors;
2091                 }
2092
2093                 return $this->commitRollback( $fromP, $summary, $bot, $resultDetails, $user );
2094         }
2095
2096         /**
2097          * Backend implementation of doRollback(), please refer there for parameter
2098          * and return value documentation
2099          *
2100          * NOTE: This function does NOT check ANY permissions, it just commits the
2101          * rollback to the DB. Therefore, you should only call this function direct-
2102          * ly if you want to use custom permissions checks. If you don't, use
2103          * doRollback() instead.
2104          * @param $fromP String: Name of the user whose edits to rollback.
2105          * @param $summary String: Custom summary. Set to default summary if empty.
2106          * @param $bot Boolean: If true, mark all reverted edits as bot.
2107          *
2108          * @param $resultDetails Array: contains result-specific array of additional values
2109          * @param $guser User The user performing the rollback
2110          */
2111         public function commitRollback( $fromP, $summary, $bot, &$resultDetails, User $guser ) {
2112                 global $wgUseRCPatrol, $wgContLang;
2113
2114                 $dbw = wfGetDB( DB_MASTER );
2115
2116                 if ( wfReadOnly() ) {
2117                         return array( array( 'readonlytext' ) );
2118                 }
2119
2120                 # Get the last editor
2121                 $current = Revision::newFromTitle( $this->mTitle );
2122                 if ( is_null( $current ) ) {
2123                         # Something wrong... no page?
2124                         return array( array( 'notanarticle' ) );
2125                 }
2126
2127                 $from = str_replace( '_', ' ', $fromP );
2128                 # User name given should match up with the top revision.
2129                 # If the user was deleted then $from should be empty.
2130                 if ( $from != $current->getUserText() ) {
2131                         $resultDetails = array( 'current' => $current );
2132                         return array( array( 'alreadyrolled',
2133                                 htmlspecialchars( $this->mTitle->getPrefixedText() ),
2134                                 htmlspecialchars( $fromP ),
2135                                 htmlspecialchars( $current->getUserText() )
2136                         ) );
2137                 }
2138
2139                 # Get the last edit not by this guy...
2140                 # Note: these may not be public values
2141                 $user = intval( $current->getRawUser() );
2142                 $user_text = $dbw->addQuotes( $current->getRawUserText() );
2143                 $s = $dbw->selectRow( 'revision',
2144                         array( 'rev_id', 'rev_timestamp', 'rev_deleted' ),
2145                         array( 'rev_page' => $current->getPage(),
2146                                 "rev_user != {$user} OR rev_user_text != {$user_text}"
2147                         ), __METHOD__,
2148                         array( 'USE INDEX' => 'page_timestamp',
2149                                 'ORDER BY' => 'rev_timestamp DESC' )
2150                         );
2151                 if ( $s === false ) {
2152                         # No one else ever edited this page
2153                         return array( array( 'cantrollback' ) );
2154                 } elseif ( $s->rev_deleted & Revision::DELETED_TEXT || $s->rev_deleted & Revision::DELETED_USER ) {
2155                         # Only admins can see this text
2156                         return array( array( 'notvisiblerev' ) );
2157                 }
2158
2159                 $set = array();
2160                 if ( $bot && $guser->isAllowed( 'markbotedits' ) ) {
2161                         # Mark all reverted edits as bot
2162                         $set['rc_bot'] = 1;
2163                 }
2164
2165                 if ( $wgUseRCPatrol ) {
2166                         # Mark all reverted edits as patrolled
2167                         $set['rc_patrolled'] = 1;
2168                 }
2169
2170                 if ( count( $set ) ) {
2171                         $dbw->update( 'recentchanges', $set,
2172                                 array( /* WHERE */
2173                                         'rc_cur_id' => $current->getPage(),
2174                                         'rc_user_text' => $current->getUserText(),
2175                                         "rc_timestamp > '{$s->rev_timestamp}'",
2176                                 ), __METHOD__
2177                         );
2178                 }
2179
2180                 # Generate the edit summary if necessary
2181                 $target = Revision::newFromId( $s->rev_id );
2182                 if ( empty( $summary ) ) {
2183                         if ( $from == '' ) { // no public user name
2184                                 $summary = wfMsgForContent( 'revertpage-nouser' );
2185                         } else {
2186                                 $summary = wfMsgForContent( 'revertpage' );
2187                         }
2188                 }
2189
2190                 # Allow the custom summary to use the same args as the default message
2191                 $args = array(
2192                         $target->getUserText(), $from, $s->rev_id,
2193                         $wgContLang->timeanddate( wfTimestamp( TS_MW, $s->rev_timestamp ) ),
2194                         $current->getId(), $wgContLang->timeanddate( $current->getTimestamp() )
2195                 );
2196                 $summary = wfMsgReplaceArgs( $summary, $args );
2197
2198                 # Save
2199                 $flags = EDIT_UPDATE;
2200
2201                 if ( $guser->isAllowed( 'minoredit' ) ) {
2202                         $flags |= EDIT_MINOR;
2203                 }
2204
2205                 if ( $bot && ( $guser->isAllowedAny( 'markbotedits', 'bot' ) ) ) {
2206                         $flags |= EDIT_FORCE_BOT;
2207                 }
2208
2209                 # Actually store the edit
2210                 $status = $this->doEdit( $target->getText(), $summary, $flags, $target->getId() );
2211                 if ( !empty( $status->value['revision'] ) ) {
2212                         $revId = $status->value['revision']->getId();
2213                 } else {
2214                         $revId = false;
2215                 }
2216
2217                 wfRunHooks( 'ArticleRollbackComplete', array( $this, $guser, $target, $current ) );
2218
2219                 $resultDetails = array(
2220                         'summary' => $summary,
2221                         'current' => $current,
2222                         'target'  => $target,
2223                         'newid'   => $revId
2224                 );
2225
2226                 return array();
2227         }
2228
2229         /**
2230          * The onArticle*() functions are supposed to be a kind of hooks
2231          * which should be called whenever any of the specified actions
2232          * are done.
2233          *
2234          * This is a good place to put code to clear caches, for instance.
2235          *
2236          * This is called on page move and undelete, as well as edit
2237          *
2238          * @param $title Title object
2239          */
2240         public static function onArticleCreate( $title ) {
2241                 # Update existence markers on article/talk tabs...
2242                 if ( $title->isTalkPage() ) {
2243                         $other = $title->getSubjectPage();
2244                 } else {
2245                         $other = $title->getTalkPage();
2246                 }
2247
2248                 $other->invalidateCache();
2249                 $other->purgeSquid();
2250
2251                 $title->touchLinks();
2252                 $title->purgeSquid();
2253                 $title->deleteTitleProtection();
2254         }
2255
2256         /**
2257          * Clears caches when article is deleted
2258          *
2259          * @param $title Title
2260          */
2261         public static function onArticleDelete( $title ) {
2262                 # Update existence markers on article/talk tabs...
2263                 if ( $title->isTalkPage() ) {
2264                         $other = $title->getSubjectPage();
2265                 } else {
2266                         $other = $title->getTalkPage();
2267                 }
2268
2269                 $other->invalidateCache();
2270                 $other->purgeSquid();
2271
2272                 $title->touchLinks();
2273                 $title->purgeSquid();
2274
2275                 # File cache
2276                 HTMLFileCache::clearFileCache( $title );
2277
2278                 # Messages
2279                 if ( $title->getNamespace() == NS_MEDIAWIKI ) {
2280                         MessageCache::singleton()->replace( $title->getDBkey(), false );
2281                 }
2282
2283                 # Images
2284                 if ( $title->getNamespace() == NS_FILE ) {
2285                         $update = new HTMLCacheUpdate( $title, 'imagelinks' );
2286                         $update->doUpdate();
2287                 }
2288
2289                 # User talk pages
2290                 if ( $title->getNamespace() == NS_USER_TALK ) {
2291                         $user = User::newFromName( $title->getText(), false );
2292                         if ( $user ) {
2293                                 $user->setNewtalk( false );
2294                         }
2295                 }
2296
2297                 # Image redirects
2298                 RepoGroup::singleton()->getLocalRepo()->invalidateImageRedirect( $title );
2299         }
2300
2301         /**
2302          * Purge caches on page update etc
2303          *
2304          * @param $title Title object
2305          * @todo:  verify that $title is always a Title object (and never false or null), add Title hint to parameter $title
2306          */
2307         public static function onArticleEdit( $title ) {
2308                 // Invalidate caches of articles which include this page
2309                 DeferredUpdates::addHTMLCacheUpdate( $title, 'templatelinks' );
2310
2311
2312                 // Invalidate the caches of all pages which redirect here
2313                 DeferredUpdates::addHTMLCacheUpdate( $title, 'redirect' );
2314
2315                 # Purge squid for this page only
2316                 $title->purgeSquid();
2317
2318                 # Clear file cache for this page only
2319                 HTMLFileCache::clearFileCache( $title );
2320         }
2321
2322         /**#@-*/
2323
2324         /**
2325          * Returns a list of hidden categories this page is a member of.
2326          * Uses the page_props and categorylinks tables.
2327          *
2328          * @return Array of Title objects
2329          */
2330         public function getHiddenCategories() {
2331                 $result = array();
2332                 $id = $this->mTitle->getArticleID();
2333
2334                 if ( $id == 0 ) {
2335                         return array();
2336                 }
2337
2338                 $dbr = wfGetDB( DB_SLAVE );
2339                 $res = $dbr->select( array( 'categorylinks', 'page_props', 'page' ),
2340                         array( 'cl_to' ),
2341                         array( 'cl_from' => $id, 'pp_page=page_id', 'pp_propname' => 'hiddencat',
2342                                 'page_namespace' => NS_CATEGORY, 'page_title=cl_to' ),
2343                         __METHOD__ );
2344
2345                 if ( $res !== false ) {
2346                         foreach ( $res as $row ) {
2347                                 $result[] = Title::makeTitle( NS_CATEGORY, $row->cl_to );
2348                         }
2349                 }
2350
2351                 return $result;
2352         }
2353
2354         /**
2355         * Return an applicable autosummary if one exists for the given edit.
2356         * @param $oldtext String: the previous text of the page.
2357         * @param $newtext String: The submitted text of the page.
2358         * @param $flags Int bitmask: a bitmask of flags submitted for the edit.
2359         * @return string An appropriate autosummary, or an empty string.
2360         */
2361         public static function getAutosummary( $oldtext, $newtext, $flags ) {
2362                 global $wgContLang;
2363
2364                 # Decide what kind of autosummary is needed.
2365
2366                 # Redirect autosummaries
2367                 $ot = Title::newFromRedirect( $oldtext );
2368                 $rt = Title::newFromRedirect( $newtext );
2369
2370                 if ( is_object( $rt ) && ( !is_object( $ot ) || !$rt->equals( $ot ) || $ot->getFragment() != $rt->getFragment() ) ) {
2371                         $truncatedtext = $wgContLang->truncate(
2372                                 str_replace( "\n", ' ', $newtext ),
2373                                 max( 0, 250
2374                                         - strlen( wfMsgForContent( 'autoredircomment' ) )
2375                                         - strlen( $rt->getFullText() )
2376                                 ) );
2377                         return wfMsgForContent( 'autoredircomment', $rt->getFullText(), $truncatedtext );
2378                 }
2379
2380                 # New page autosummaries
2381                 if ( $flags & EDIT_NEW && strlen( $newtext ) ) {
2382                         # If they're making a new article, give its text, truncated, in the summary.
2383
2384                         $truncatedtext = $wgContLang->truncate(
2385                                 str_replace( "\n", ' ', $newtext ),
2386                                 max( 0, 200 - strlen( wfMsgForContent( 'autosumm-new' ) ) ) );
2387
2388                         return wfMsgForContent( 'autosumm-new', $truncatedtext );
2389                 }
2390
2391                 # Blanking autosummaries
2392                 if ( $oldtext != '' && $newtext == '' ) {
2393                         return wfMsgForContent( 'autosumm-blank' );
2394                 } elseif ( strlen( $oldtext ) > 10 * strlen( $newtext ) && strlen( $newtext ) < 500 ) {
2395                         # Removing more than 90% of the article
2396
2397                         $truncatedtext = $wgContLang->truncate(
2398                                 $newtext,
2399                                 max( 0, 200 - strlen( wfMsgForContent( 'autosumm-replace' ) ) ) );
2400
2401                         return wfMsgForContent( 'autosumm-replace', $truncatedtext );
2402                 }
2403
2404                 # If we reach this point, there's no applicable autosummary for our case, so our
2405                 # autosummary is empty.
2406                 return '';
2407         }
2408
2409         /**
2410          * Auto-generates a deletion reason
2411          *
2412          * @param &$hasHistory Boolean: whether the page has a history
2413          * @return mixed String containing deletion reason or empty string, or boolean false
2414          *    if no revision occurred
2415          */
2416         public function getAutoDeleteReason( &$hasHistory ) {
2417                 global $wgContLang;
2418
2419                 $dbw = wfGetDB( DB_MASTER );
2420                 // Get the last revision
2421                 $rev = Revision::newFromTitle( $this->getTitle() );
2422
2423                 if ( is_null( $rev ) ) {
2424                         return false;
2425                 }
2426
2427                 // Get the article's contents
2428                 $contents = $rev->getText();
2429                 $blank = false;
2430
2431                 // If the page is blank, use the text from the previous revision,
2432                 // which can only be blank if there's a move/import/protect dummy revision involved
2433                 if ( $contents == '' ) {
2434                         $prev = $rev->getPrevious();
2435
2436                         if ( $prev )    {
2437                                 $contents = $prev->getText();
2438                                 $blank = true;
2439                         }
2440                 }
2441
2442                 // Find out if there was only one contributor
2443                 // Only scan the last 20 revisions
2444                 $res = $dbw->select( 'revision', 'rev_user_text',
2445                         array( 'rev_page' => $this->getID(), $dbw->bitAnd( 'rev_deleted', Revision::DELETED_USER ) . ' = 0' ),
2446                         __METHOD__,
2447                         array( 'LIMIT' => 20 )
2448                 );
2449
2450                 if ( $res === false ) {
2451                         // This page has no revisions, which is very weird
2452                         return false;
2453                 }
2454
2455                 $hasHistory = ( $res->numRows() > 1 );
2456                 $row = $dbw->fetchObject( $res );
2457
2458                 if ( $row ) { // $row is false if the only contributor is hidden
2459                         $onlyAuthor = $row->rev_user_text;
2460                         // Try to find a second contributor
2461                         foreach ( $res as $row ) {
2462                                 if ( $row->rev_user_text != $onlyAuthor ) { // Bug 22999
2463                                         $onlyAuthor = false;
2464                                         break;
2465                                 }
2466                         }
2467                 } else {
2468                         $onlyAuthor = false;
2469                 }
2470
2471                 // Generate the summary with a '$1' placeholder
2472                 if ( $blank ) {
2473                         // The current revision is blank and the one before is also
2474                         // blank. It's just not our lucky day
2475                         $reason = wfMsgForContent( 'exbeforeblank', '$1' );
2476                 } else {
2477                         if ( $onlyAuthor ) {
2478                                 $reason = wfMsgForContent( 'excontentauthor', '$1', $onlyAuthor );
2479                         } else {
2480                                 $reason = wfMsgForContent( 'excontent', '$1' );
2481                         }
2482                 }
2483
2484                 if ( $reason == '-' ) {
2485                         // Allow these UI messages to be blanked out cleanly
2486                         return '';
2487                 }
2488
2489                 // Replace newlines with spaces to prevent uglyness
2490                 $contents = preg_replace( "/[\n\r]/", ' ', $contents );
2491                 // Calculate the maximum amount of chars to get
2492                 // Max content length = max comment length - length of the comment (excl. $1)
2493                 $maxLength = 255 - ( strlen( $reason ) - 2 );
2494                 $contents = $wgContLang->truncate( $contents, $maxLength );
2495                 // Remove possible unfinished links
2496                 $contents = preg_replace( '/\[\[([^\]]*)\]?$/', '$1', $contents );
2497                 // Now replace the '$1' placeholder
2498                 $reason = str_replace( '$1', $contents, $reason );
2499
2500                 return $reason;
2501         }
2502
2503         /**
2504          * Update all the appropriate counts in the category table, given that
2505          * we've added the categories $added and deleted the categories $deleted.
2506          *
2507          * @param $added array   The names of categories that were added
2508          * @param $deleted array The names of categories that were deleted
2509          */
2510         public function updateCategoryCounts( $added, $deleted ) {
2511                 $ns = $this->mTitle->getNamespace();
2512                 $dbw = wfGetDB( DB_MASTER );
2513
2514                 # First make sure the rows exist.  If one of the "deleted" ones didn't
2515                 # exist, we might legitimately not create it, but it's simpler to just
2516                 # create it and then give it a negative value, since the value is bogus
2517                 # anyway.
2518                 #
2519                 # Sometimes I wish we had INSERT ... ON DUPLICATE KEY UPDATE.
2520                 $insertCats = array_merge( $added, $deleted );
2521                 if ( !$insertCats ) {
2522                         # Okay, nothing to do
2523                         return;
2524                 }
2525
2526                 $insertRows = array();
2527
2528                 foreach ( $insertCats as $cat ) {
2529                         $insertRows[] = array(
2530                                 'cat_id' => $dbw->nextSequenceValue( 'category_cat_id_seq' ),
2531                                 'cat_title' => $cat
2532                         );
2533                 }
2534                 $dbw->insert( 'category', $insertRows, __METHOD__, 'IGNORE' );
2535
2536                 $addFields    = array( 'cat_pages = cat_pages + 1' );
2537                 $removeFields = array( 'cat_pages = cat_pages - 1' );
2538
2539                 if ( $ns == NS_CATEGORY ) {
2540                         $addFields[]    = 'cat_subcats = cat_subcats + 1';
2541                         $removeFields[] = 'cat_subcats = cat_subcats - 1';
2542                 } elseif ( $ns == NS_FILE ) {
2543                         $addFields[]    = 'cat_files = cat_files + 1';
2544                         $removeFields[] = 'cat_files = cat_files - 1';
2545                 }
2546
2547                 if ( $added ) {
2548                         $dbw->update(
2549                                 'category',
2550                                 $addFields,
2551                                 array( 'cat_title' => $added ),
2552                                 __METHOD__
2553                         );
2554                 }
2555
2556                 if ( $deleted ) {
2557                         $dbw->update(
2558                                 'category',
2559                                 $removeFields,
2560                                 array( 'cat_title' => $deleted ),
2561                                 __METHOD__
2562                         );
2563                 }
2564         }
2565
2566         /**
2567          * Updates cascading protections
2568          *
2569          * @param $parserOutput ParserOutput object for the current version
2570          */
2571         public function doCascadeProtectionUpdates( ParserOutput $parserOutput ) {
2572                 if ( wfReadOnly() || !$this->mTitle->areRestrictionsCascading() ) {
2573                         return;
2574                 }
2575
2576                 // templatelinks table may have become out of sync,
2577                 // especially if using variable-based transclusions.
2578                 // For paranoia, check if things have changed and if
2579                 // so apply updates to the database. This will ensure
2580                 // that cascaded protections apply as soon as the changes
2581                 // are visible.
2582
2583                 # Get templates from templatelinks
2584                 $id = $this->mTitle->getArticleID();
2585
2586                 $tlTemplates = array();
2587
2588                 $dbr = wfGetDB( DB_SLAVE );
2589                 $res = $dbr->select( array( 'templatelinks' ),
2590                         array( 'tl_namespace', 'tl_title' ),
2591                         array( 'tl_from' => $id ),
2592                         __METHOD__
2593                 );
2594
2595                 foreach ( $res as $row ) {
2596                         $tlTemplates["{$row->tl_namespace}:{$row->tl_title}"] = true;
2597                 }
2598
2599                 # Get templates from parser output.
2600                 $poTemplates = array();
2601                 foreach ( $parserOutput->getTemplates() as $ns => $templates ) {
2602                         foreach ( $templates as $dbk => $id ) {
2603                                 $poTemplates["$ns:$dbk"] = true;
2604                         }
2605                 }
2606
2607                 # Get the diff
2608                 $templates_diff = array_diff_key( $poTemplates, $tlTemplates );
2609
2610                 if ( count( $templates_diff ) > 0 ) {
2611                         # Whee, link updates time.
2612                         $u = new LinksUpdate( $this->mTitle, $parserOutput, false );
2613                         $u->doUpdate();
2614                 }
2615         }
2616
2617         /**
2618          * Return a list of templates used by this article.
2619          * Uses the templatelinks table
2620          *
2621          * @deprecated in 1.19; use Title::getTemplateLinksFrom()
2622          * @return Array of Title objects
2623          */
2624         public function getUsedTemplates() {
2625                 return $this->mTitle->getTemplateLinksFrom();
2626         }
2627
2628         /**
2629          * Perform article updates on a special page creation.
2630          *
2631          * @param $rev Revision object
2632          *
2633          * @todo This is a shitty interface function. Kill it and replace the
2634          * other shitty functions like doEditUpdates and such so it's not needed
2635          * anymore.
2636          * @deprecated since 1.18, use doEditUpdates()
2637          */
2638         public function createUpdates( $rev ) {
2639                 wfDeprecated( __METHOD__, '1.18' );
2640                 global $wgUser;
2641                 $this->doEditUpdates( $rev, $wgUser, array( 'created' => true ) );
2642         }
2643
2644         /**
2645          * This function is called right before saving the wikitext,
2646          * so we can do things like signatures and links-in-context.
2647          *
2648          * @deprecated in 1.19; use Parser::preSaveTransform() instead
2649          * @param $text String article contents
2650          * @param $user User object: user doing the edit
2651          * @param $popts ParserOptions object: parser options, default options for
2652          *               the user loaded if null given
2653          * @return string article contents with altered wikitext markup (signatures
2654          *      converted, {{subst:}}, templates, etc.)
2655          */
2656         public function preSaveTransform( $text, User $user = null, ParserOptions $popts = null ) {
2657                 global $wgParser, $wgUser;
2658
2659                 wfDeprecated( __METHOD__, '1.19' );
2660
2661                 $user = is_null( $user ) ? $wgUser : $user;
2662
2663                 if ( $popts === null ) {
2664                         $popts = ParserOptions::newFromUser( $user );
2665                 }
2666
2667                 return $wgParser->preSaveTransform( $text, $this->mTitle, $user, $popts );
2668         }
2669
2670         /**
2671          * Check whether the number of revisions of this page surpasses $wgDeleteRevisionsLimit
2672          *
2673          * @deprecated in 1.19; use Title::isBigDeletion() instead.
2674          * @return bool
2675          */
2676         public function isBigDeletion() {
2677                 wfDeprecated( __METHOD__, '1.19' );
2678                 return $this->mTitle->isBigDeletion();
2679         }
2680
2681         /**
2682          * Get the  approximate revision count of this page.
2683          *
2684          * @deprecated in 1.19; use Title::estimateRevisionCount() instead.
2685          * @return int
2686          */
2687         public function estimateRevisionCount() {
2688                 wfDeprecated( __METHOD__, '1.19' );
2689                 return $this->mTitle->estimateRevisionCount();
2690         }
2691
2692         /**
2693          * Update the article's restriction field, and leave a log entry.
2694          *
2695          * @deprecated since 1.19
2696          * @param $limit Array: set of restriction keys
2697          * @param $reason String
2698          * @param &$cascade Integer. Set to false if cascading protection isn't allowed.
2699          * @param $expiry Array: per restriction type expiration
2700          * @param $user User The user updating the restrictions
2701          * @return bool true on success
2702          */
2703         public function updateRestrictions(
2704                 $limit = array(), $reason = '', &$cascade = 0, $expiry = array(), User $user = null
2705         ) {
2706                 global $wgUser;
2707
2708                 $user = is_null( $user ) ? $wgUser : $user;
2709
2710                 return $this->doUpdateRestrictions( $limit, $expiry, $cascade, $reason, $user )->isOK();
2711         }
2712
2713         /**
2714          * @deprecated since 1.18
2715          */
2716         public function quickEdit( $text, $comment = '', $minor = 0 ) {
2717                 wfDeprecated( __METHOD__, '1.18' );
2718                 global $wgUser;
2719                 return $this->doQuickEdit( $text, $wgUser, $comment, $minor );
2720         }
2721
2722         /**
2723          * @deprecated since 1.18
2724          */
2725         public function viewUpdates() {
2726                 wfDeprecated( __METHOD__, '1.18' );
2727                 global $wgUser;
2728                 return $this->doViewUpdates( $wgUser );
2729         }
2730
2731         /**
2732          * @deprecated since 1.18
2733          */
2734         public function useParserCache( $oldid ) {
2735                 wfDeprecated( __METHOD__, '1.18' );
2736                 global $wgUser;
2737                 return $this->isParserCacheUsed( ParserOptions::newFromUser( $wgUser ), $oldid );
2738         }
2739 }
2740
2741 class PoolWorkArticleView extends PoolCounterWork {
2742
2743         /**
2744          * @var Page
2745          */
2746         private $page;
2747
2748         /**
2749          * @var string
2750          */
2751         private $cacheKey;
2752
2753         /**
2754          * @var integer
2755          */
2756         private $revid;
2757
2758         /**
2759          * @var ParserOptions
2760          */
2761         private $parserOptions;
2762
2763         /**
2764          * @var string|null
2765          */
2766         private $text;
2767
2768         /**
2769          * @var ParserOutput|false
2770          */
2771         private $parserOutput = false;
2772
2773         /**
2774          * @var bool
2775          */
2776         private $isDirty = false;
2777
2778         /**
2779          * @var Status|false
2780          */
2781         private $error = false;
2782
2783         /**
2784          * Constructor
2785          *
2786          * @param $page Page
2787          * @param $revid Integer: ID of the revision being parsed
2788          * @param $useParserCache Boolean: whether to use the parser cache
2789          * @param $parserOptions parserOptions to use for the parse operation
2790          * @param $text String: text to parse or null to load it
2791          */
2792         function __construct( Page $page, ParserOptions $parserOptions, $revid, $useParserCache, $text = null ) {
2793                 $this->page = $page;
2794                 $this->revid = $revid;
2795                 $this->cacheable = $useParserCache;
2796                 $this->parserOptions = $parserOptions;
2797                 $this->text = $text;
2798                 $this->cacheKey = ParserCache::singleton()->getKey( $page, $parserOptions );
2799                 parent::__construct( 'ArticleView', $this->cacheKey . ':revid:' . $revid );
2800         }
2801
2802         /**
2803          * Get the ParserOutput from this object, or false in case of failure
2804          *
2805          * @return ParserOutput
2806          */
2807         public function getParserOutput() {
2808                 return $this->parserOutput;
2809         }
2810
2811         /**
2812          * Get whether the ParserOutput is a dirty one (i.e. expired)
2813          *
2814          * @return bool
2815          */
2816         public function getIsDirty() {
2817                 return $this->isDirty;
2818         }
2819
2820         /**
2821          * Get a Status object in case of error or false otherwise
2822          *
2823          * @return Status|false
2824          */
2825         public function getError() {
2826                 return $this->error;
2827         }
2828
2829         /**
2830          * @return bool
2831          */
2832         function doWork() {
2833                 global $wgParser, $wgUseFileCache;
2834
2835                 $isCurrent = $this->revid === $this->page->getLatest();
2836
2837                 if ( $this->text !== null ) {
2838                         $text = $this->text;
2839                 } elseif ( $isCurrent ) {
2840                         $text = $this->page->getRawText();
2841                 } else {
2842                         $rev = Revision::newFromTitle( $this->page->getTitle(), $this->revid );
2843                         if ( $rev === null ) {
2844                                 return false;
2845                         }
2846                         $text = $rev->getText();
2847                 }
2848
2849                 $time = - wfTime();
2850                 $this->parserOutput = $wgParser->parse( $text, $this->page->getTitle(),
2851                         $this->parserOptions, true, true, $this->revid );
2852                 $time += wfTime();
2853
2854                 # Timing hack
2855                 if ( $time > 3 ) {
2856                         wfDebugLog( 'slow-parse', sprintf( "%-5.2f %s", $time,
2857                                 $this->page->getTitle()->getPrefixedDBkey() ) );
2858                 }
2859
2860                 if ( $this->cacheable && $this->parserOutput->isCacheable() ) {
2861                         ParserCache::singleton()->save( $this->parserOutput, $this->page, $this->parserOptions );
2862                 }
2863
2864                 // Make sure file cache is not used on uncacheable content.
2865                 // Output that has magic words in it can still use the parser cache
2866                 // (if enabled), though it will generally expire sooner.
2867                 if ( !$this->parserOutput->isCacheable() || $this->parserOutput->containsOldMagic() ) {
2868                         $wgUseFileCache = false;
2869                 }
2870
2871                 if ( $isCurrent ) {
2872                         $this->page->doCascadeProtectionUpdates( $this->parserOutput );
2873                 }
2874
2875                 return true;
2876         }
2877
2878         /**
2879          * @return bool
2880          */
2881         function getCachedWork() {
2882                 $this->parserOutput = ParserCache::singleton()->get( $this->page, $this->parserOptions );
2883
2884                 if ( $this->parserOutput === false ) {
2885                         wfDebug( __METHOD__ . ": parser cache miss\n" );
2886                         return false;
2887                 } else {
2888                         wfDebug( __METHOD__ . ": parser cache hit\n" );
2889                         return true;
2890                 }
2891         }
2892
2893         /**
2894          * @return bool
2895          */
2896         function fallback() {
2897                 $this->parserOutput = ParserCache::singleton()->getDirty( $this->page, $this->parserOptions );
2898
2899                 if ( $this->parserOutput === false ) {
2900                         wfDebugLog( 'dirty', "dirty missing\n" );
2901                         wfDebug( __METHOD__ . ": no dirty cache\n" );
2902                         return false;
2903                 } else {
2904                         wfDebug( __METHOD__ . ": sending dirty output\n" );
2905                         wfDebugLog( 'dirty', "dirty output {$this->cacheKey}\n" );
2906                         $this->isDirty = true;
2907                         return true;
2908                 }
2909         }
2910
2911         /**
2912          * @param $status Status
2913          */
2914         function error( $status ) {
2915                 $this->error = $status;
2916                 return false;
2917         }
2918 }