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          * @protected
  19          */
  20         public $mTitle = null;
  21
  22         /**@{{
  23          * @protected
  24          */
  25         public $mCounter = -1;               // !< Integer (-1 means "not loaded")
  26         public $mDataLoaded = false;         // !< Boolean
  27         public $mIsRedirect = false;         // !< Boolean
  28         public $mLatest = false;             // !< Boolean
  29         public $mPreparedEdit = false;           // !< Array
  30         public $mRedirectTarget = null;          // !< Title object
  31         public $mLastRevision = null;            // !< Revision object
  32         public $mTimestamp = '';             // !< String
  33         public $mTouched = '19700101000000'; // !< String
  34         /**@}}*/
  35
  36         /**
  37          * @protected
  38          * @var ParserOptions: ParserOptions object for $wgUser articles
  39          */
  40         public $mParserOptions;
  41
  42         /**
  43          * Constructor and clear the article
  44          * @param $title Title Reference to a Title object.
  45          */
  46         public function __construct( Title $title ) {
  47                 $this->mTitle = $title;
  48         }
  49
  50         /**
  51          * Create a WikiPage object of the appropriate class for the given title.
  52          *
  53          * @param $title Title
  54          * @return WikiPage object of the appropriate type
  55          */
  56         public static function factory( Title $title ) {
  57                 $ns = $title->getNamespace();
  58
  59                 if ( $ns == NS_MEDIA ) {
  60                         throw new MWException( "NS_MEDIA is a virtual namespace; use NS_FILE." );
  61                 } elseif ( $ns < 0 ) {
  62                         throw new MWException( "Invalid or virtual namespace $ns given." );
  63                 }
  64
  65                 switch ( $ns ) {
  66                         case NS_FILE:
  67                                 $page = new WikiFilePage( $title );
  68                                 break;
  69                         case NS_CATEGORY:
  70                                 $page = new WikiCategoryPage( $title );
  71                                 break;
  72                         default:
  73                                 $page = new WikiPage( $title );
  74                 }
  75
  76                 return $page;
  77         }
  78
  79         /**
  80          * Constructor from a page id
  81          *
  82          * Always override this for all subclasses (until we use PHP with LSB)
  83          *
  84          * @param $id Int article ID to load
  85          *
  86          * @return WikiPage
  87          */
  88         public static function newFromID( $id ) {
  89                 $t = Title::newFromID( $id );
  90                 # @todo FIXME: Doesn't inherit right
  91                 return $t == null ? null : new self( $t );
  92                 # return $t == null ? null : new static( $t ); // PHP 5.3
  93         }
  94
  95         /**
  96          * Returns overrides for action handlers.
  97          * Classes listed here will be used instead of the default one when
  98          * (and only when) $wgActions[$action] === true. This allows subclasses
  99          * to override the default behavior.
 100          *
 101          * @return Array
 102          */
 103         public function getActionOverrides() {
 104                 return array();
 105         }
 106
 107         /**
 108          * If this page is a redirect, get its target
 109          *
 110          * The target will be fetched from the redirect table if possible.
 111          * If this page doesn't have an entry there, call insertRedirect()
 112          * @return Title|mixed object, or null if this page is not a redirect
 113          */
 114         public function getRedirectTarget() {
 115                 if ( !$this->mTitle->isRedirect() ) {
 116                         return null;
 117                 }
 118
 119                 if ( $this->mRedirectTarget !== null ) {
 120                         return $this->mRedirectTarget;
 121                 }
 122
 123                 # Query the redirect table
 124                 $dbr = wfGetDB( DB_SLAVE );
 125                 $row = $dbr->selectRow( 'redirect',
 126                         array( 'rd_namespace', 'rd_title', 'rd_fragment', 'rd_interwiki' ),
 127                         array( 'rd_from' => $this->getId() ),
 128                         __METHOD__
 129                 );
 130
 131                 // rd_fragment and rd_interwiki were added later, populate them if empty
 132                 if ( $row && !is_null( $row->rd_fragment ) && !is_null( $row->rd_interwiki ) ) {
 133                         return $this->mRedirectTarget = Title::makeTitle(
 134                                 $row->rd_namespace, $row->rd_title,
 135                                 $row->rd_fragment, $row->rd_interwiki );
 136                 }
 137
 138                 # This page doesn't have an entry in the redirect table
 139                 return $this->mRedirectTarget = $this->insertRedirect();
 140         }
 141
 142         /**
 143          * Insert an entry for this page into the redirect table.
 144          *
 145          * Don't call this function directly unless you know what you're doing.
 146          * @return Title object or null if not a redirect
 147          */
 148         public function insertRedirect() {
 149                 // recurse through to only get the final target
 150                 $retval = Title::newFromRedirectRecurse( $this->getRawText() );
 151                 if ( !$retval ) {
 152                         return null;
 153                 }
 154                 $this->insertRedirectEntry( $retval );
 155                 return $retval;
 156         }
 157
 158         /**
 159          * Insert or update the redirect table entry for this page to indicate
 160          * it redirects to $rt .
 161          * @param $rt Title redirect target
 162          */
 163         public function insertRedirectEntry( $rt ) {
 164                 $dbw = wfGetDB( DB_MASTER );
 165                 $dbw->replace( 'redirect', array( 'rd_from' ),
 166                         array(
 167                                 'rd_from'               => $this->getId(),
 168                                 'rd_namespace'  => $rt->getNamespace(),
 169                                 'rd_title'              => $rt->getDBkey(),
 170                                 'rd_fragment'   => $rt->getFragment(),
 171                                 'rd_interwiki'  => $rt->getInterwiki(),
 172                         ),
 173                         __METHOD__
 174                 );
 175         }
 176
 177         /**
 178          * Get the Title object or URL this page redirects to
 179          *
 180          * @return mixed false, Title of in-wiki target, or string with URL
 181          */
 182         public function followRedirect() {
 183                 return $this->getRedirectURL( $this->getRedirectTarget() );
 184         }
 185
 186         /**
 187          * Get the Title object or URL to use for a redirect. We use Title
 188          * objects for same-wiki, non-special redirects and URLs for everything
 189          * else.
 190          * @param $rt Title Redirect target
 191          * @return mixed false, Title object of local target, or string with URL
 192          */
 193         public function getRedirectURL( $rt ) {
 194                 if ( $rt ) {
 195                         if ( $rt->getInterwiki() != '' ) {
 196                                 if ( $rt->isLocal() ) {
 197                                         // Offsite wikis need an HTTP redirect.
 198                                         //
 199                                         // This can be hard to reverse and may produce loops,
 200                                         // so they may be disabled in the site configuration.
 201                                         $source = $this->mTitle->getFullURL( 'redirect=no' );
 202                                         return $rt->getFullURL( 'rdfrom=' . urlencode( $source ) );
 203                                 }
 204                         } else {
 205                                 if ( $rt->getNamespace() == NS_SPECIAL ) {
 206                                         // Gotta handle redirects to special pages differently:
 207                                         // Fill the HTTP response "Location" header and ignore
 208                                         // the rest of the page we're on.
 209                                         //
 210                                         // This can be hard to reverse, so they may be disabled.
 211                                         if ( $rt->isSpecial( 'Userlogout' ) ) {
 212                                                 // rolleyes
 213                                         } else {
 214                                                 return $rt->getFullURL();
 215                                         }
 216                                 }
 217
 218                                 return $rt;
 219                         }
 220                 }
 221
 222                 // No or invalid redirect
 223                 return false;
 224         }
 225
 226         /**
 227          * Get the title object of the article
 228          * @return Title object of this page
 229          */
 230         public function getTitle() {
 231                 return $this->mTitle;
 232         }
 233
 234         /**
 235          * Clear the object
 236          */
 237         public function clear() {
 238                 $this->mDataLoaded = false;
 239
 240                 $this->mCounter = -1; # Not loaded
 241                 $this->mRedirectTarget = null; # Title object if set
 242                 $this->mLastRevision = null; # Latest revision
 243                 $this->mTimestamp = '';
 244                 $this->mTouched = '19700101000000';
 245                 $this->mIsRedirect = false;
 246                 $this->mLatest = false;
 247                 $this->mPreparedEdit = false;
 248         }
 249
 250         /**
 251          * Get the text that needs to be saved in order to undo all revisions
 252          * between $undo and $undoafter. Revisions must belong to the same page,
 253          * must exist and must not be deleted
 254          * @param $undo Revision
 255          * @param $undoafter Revision Must be an earlier revision than $undo
 256          * @return mixed string on success, false on failure
 257          */
 258         public function getUndoText( Revision $undo, Revision $undoafter = null ) {
 259                 $cur_text = $this->getRawText();
 260                 if ( $cur_text === false ) {
 261                         return false; // no page
 262                 }
 263                 $undo_text = $undo->getText();
 264                 $undoafter_text = $undoafter->getText();
 265
 266                 if ( $cur_text == $undo_text ) {
 267                         # No use doing a merge if it's just a straight revert.
 268                         return $undoafter_text;
 269                 }
 270
 271                 $undone_text = '';
 272
 273                 if ( !wfMerge( $undo_text, $undoafter_text, $cur_text, $undone_text ) ) {
 274                         return false;
 275                 }
 276
 277                 return $undone_text;
 278         }
 279
 280         /**
 281          * Return the list of revision fields that should be selected to create
 282          * a new page.
 283          *
 284          * @return array
 285          */
 286         public static function selectFields() {
 287                 return array(
 288                         'page_id',
 289                         'page_namespace',
 290                         'page_title',
 291                         'page_restrictions',
 292                         'page_counter',
 293                         'page_is_redirect',
 294                         'page_is_new',
 295                         'page_random',
 296                         'page_touched',
 297                         'page_latest',
 298                         'page_len',
 299                 );
 300         }
 301
 302         /**
 303          * Fetch a page record with the given conditions
 304          * @param $dbr DatabaseBase object
 305          * @param $conditions Array
 306          * @return mixed Database result resource, or false on failure
 307          */
 308         protected function pageData( $dbr, $conditions ) {
 309                 $fields = self::selectFields();
 310
 311                 wfRunHooks( 'ArticlePageDataBefore', array( &$this, &$fields ) );
 312
 313                 $row = $dbr->selectRow( 'page', $fields, $conditions, __METHOD__ );
 314
 315                 wfRunHooks( 'ArticlePageDataAfter', array( &$this, &$row ) );
 316
 317                 return $row;
 318         }
 319
 320         /**
 321          * Fetch a page record matching the Title object's namespace and title
 322          * using a sanitized title string
 323          *
 324          * @param $dbr DatabaseBase object
 325          * @param $title Title object
 326          * @return mixed Database result resource, or false on failure
 327          */
 328         public function pageDataFromTitle( $dbr, $title ) {
 329                 return $this->pageData( $dbr, array(
 330                         'page_namespace' => $title->getNamespace(),
 331                         'page_title'     => $title->getDBkey() ) );
 332         }
 333
 334         /**
 335          * Fetch a page record matching the requested ID
 336          *
 337          * @param $dbr DatabaseBase
 338          * @param $id Integer
 339          * @return mixed Database result resource, or false on failure
 340          */
 341         public function pageDataFromId( $dbr, $id ) {
 342                 return $this->pageData( $dbr, array( 'page_id' => $id ) );
 343         }
 344
 345         /**
 346          * Set the general counter, title etc data loaded from
 347          * some source.
 348          *
 349          * @param $data Object|String One of the following:
 350          *              A DB query result object or...
 351          *              "fromdb" to get from a slave DB or...
 352          *              "fromdbmaster" to get from the master DB
 353          * @return void
 354          */
 355         public function loadPageData( $data = 'fromdb' ) {
 356                 if ( $data === 'fromdbmaster' ) {
 357                         $data = $this->pageDataFromTitle( wfGetDB( DB_MASTER ), $this->mTitle );
 358                 } elseif ( $data === 'fromdb' ) { // slave
 359                         $data = $this->pageDataFromTitle( wfGetDB( DB_SLAVE ), $this->mTitle );
 360                         # Use a "last rev inserted" timestamp key to dimish the issue of slave lag.
 361                         # Note that DB also stores the master position in the session and checks it.
 362                         $touched = $this->getCachedLastEditTime();
 363                         if ( $touched ) { // key set
 364                                 if ( !$data || $touched > wfTimestamp( TS_MW, $data->page_touched ) ) {
 365                                         $data = $this->pageDataFromTitle( wfGetDB( DB_MASTER ), $this->mTitle );
 366                                 }
 367                         }
 368                 }
 369
 370                 $lc = LinkCache::singleton();
 371
 372                 if ( $data ) {
 373                         $lc->addGoodLinkObj( $data->page_id, $this->mTitle,
 374                                 $data->page_len, $data->page_is_redirect, $data->page_latest );
 375
 376                         $this->mTitle->loadFromRow( $data );
 377
 378                         # Old-fashioned restrictions
 379                         $this->mTitle->loadRestrictions( $data->page_restrictions );
 380
 381                         $this->mCounter     = intval( $data->page_counter );
 382                         $this->mTouched     = wfTimestamp( TS_MW, $data->page_touched );
 383                         $this->mIsRedirect  = intval( $data->page_is_redirect );
 384                         $this->mLatest      = intval( $data->page_latest );
 385                 } else {
 386                         $lc->addBadLinkObj( $this->mTitle );
 387
 388                         $this->mTitle->loadFromRow( false );
 389                 }
 390
 391                 $this->mDataLoaded = true;
 392         }
 393
 394         /**
 395          * @return int Page ID
 396          */
 397         public function getId() {
 398                 return $this->mTitle->getArticleID();
 399         }
 400
 401         /**
 402          * @return bool Whether or not the page exists in the database
 403          */
 404         public function exists() {
 405                 return $this->getId() > 0;
 406         }
 407
 408         /**
 409          * Check if this page is something we're going to be showing
 410          * some sort of sensible content for. If we return false, page
 411          * views (plain action=view) will return an HTTP 404 response,
 412          * so spiders and robots can know they're following a bad link.
 413          *
 414          * @return bool
 415          */
 416         public function hasViewableContent() {
 417                 return $this->exists() || $this->mTitle->isAlwaysKnown();
 418         }
 419
 420         /**
 421          * @return int The view count for the page
 422          */
 423         public function getCount() {
 424                 if ( -1 == $this->mCounter ) {
 425                         $id = $this->getId();
 426
 427                         if ( $id == 0 ) {
 428                                 $this->mCounter = 0;
 429                         } else {
 430                                 $dbr = wfGetDB( DB_SLAVE );
 431                                 $this->mCounter = $dbr->selectField( 'page',
 432                                         'page_counter',
 433                                         array( 'page_id' => $id ),
 434                                         __METHOD__
 435                                 );
 436                         }
 437                 }
 438
 439                 return $this->mCounter;
 440         }
 441
 442         /**
 443          * Determine whether a page would be suitable for being counted as an
 444          * article in the site_stats table based on the title & its content
 445          *
 446          * @param $editInfo Object or false: object returned by prepareTextForEdit(),
 447          *        if false, the current database state will be used
 448          * @return Boolean
 449          */
 450         public function isCountable( $editInfo = false ) {
 451                 global $wgArticleCountMethod;
 452
 453                 if ( !$this->mTitle->isContentPage() ) {
 454                         return false;
 455                 }
 456
 457                 $text = $editInfo ? $editInfo->pst : false;
 458
 459                 if ( $this->isRedirect( $text ) ) {
 460                         return false;
 461                 }
 462
 463                 switch ( $wgArticleCountMethod ) {
 464                 case 'any':
 465                         return true;
 466                 case 'comma':
 467                         if ( $text === false ) {
 468                                 $text = $this->getRawText();
 469                         }
 470                         return strpos( $text,  ',' ) !== false;
 471                 case 'link':
 472                         if ( $editInfo ) {
 473                                 // ParserOutput::getLinks() is a 2D array of page links, so
 474                                 // to be really correct we would need to recurse in the array
 475                                 // but the main array should only have items in it if there are
 476                                 // links.
 477                                 return (bool)count( $editInfo->output->getLinks() );
 478                         } else {
 479                                 return (bool)wfGetDB( DB_SLAVE )->selectField( 'pagelinks', 1,
 480                                         array( 'pl_from' => $this->getId() ), __METHOD__ );
 481                         }
 482                 }
 483         }
 484
 485         /**
 486          * Tests if the article text represents a redirect
 487          *
 488          * @param $text mixed string containing article contents, or boolean
 489          * @return bool
 490          */
 491         public function isRedirect( $text = false ) {
 492                 if ( $text === false ) {
 493                         if ( !$this->mDataLoaded ) {
 494                                 $this->loadPageData();
 495                         }
 496
 497                         return (bool)$this->mIsRedirect;
 498                 } else {
 499                         return Title::newFromRedirect( $text ) !== null;
 500                 }
 501         }
 502
 503         /**
 504          * Loads everything except the text
 505          * This isn't necessary for all uses, so it's only done if needed.
 506          */
 507         protected function loadLastEdit() {
 508                 if ( $this->mLastRevision !== null ) {
 509                         return; // already loaded
 510                 }
 511
 512                 $latest = $this->getLatest();
 513                 if ( !$latest ) {
 514                         return; // page doesn't exist or is missing page_latest info
 515                 }
 516
 517                 $revision = Revision::newFromPageId( $this->getId(), $latest );
 518                 if ( $revision ) { // sanity
 519                         $this->setLastEdit( $revision );
 520                 }
 521         }
 522
 523         /**
 524          * Set the latest revision
 525          */
 526         protected function setLastEdit( Revision $revision ) {
 527                 $this->mLastRevision = $revision;
 528                 $this->mTimestamp = $revision->getTimestamp();
 529         }
 530
 531         /**
 532          * Get the latest revision
 533          * @return Revision|null
 534          */
 535         public function getRevision() {
 536                 $this->loadLastEdit();
 537                 if ( $this->mLastRevision ) {
 538                         return $this->mLastRevision;
 539                 }
 540                 return null;
 541         }
 542
 543         /**
 544          * Get the text of the current revision. No side-effects...
 545          *
 546          * @param $audience Integer: one of:
 547          *      Revision::FOR_PUBLIC       to be displayed to all users
 548          *      Revision::FOR_THIS_USER    to be displayed to $wgUser
 549          *      Revision::RAW              get the text regardless of permissions
 550          * @return String|false The text of the current revision
 551          */
 552         public function getText( $audience = Revision::FOR_PUBLIC ) {
 553                 $this->loadLastEdit();
 554                 if ( $this->mLastRevision ) {
 555                         return $this->mLastRevision->getText( $audience );
 556                 }
 557                 return false;
 558         }
 559
 560         /**
 561          * Get the text of the current revision. No side-effects...
 562          *
 563          * @return String|false The text of the current revision
 564          */
 565         public function getRawText() {
 566                 $this->loadLastEdit();
 567                 if ( $this->mLastRevision ) {
 568                         return $this->mLastRevision->getRawText();
 569                 }
 570                 return false;
 571         }
 572
 573         /**
 574          * @return string MW timestamp of last article revision
 575          */
 576         public function getTimestamp() {
 577                 // Check if the field has been filled by ParserCache::get()
 578                 if ( !$this->mTimestamp ) {
 579                         $this->loadLastEdit();
 580                 }
 581                 return wfTimestamp( TS_MW, $this->mTimestamp );
 582         }
 583
 584         /**
 585          * Set the page timestamp (use only to avoid DB queries)
 586          * @param $ts string MW timestamp of last article revision
 587          * @return void
 588          */
 589         public function setTimestamp( $ts ) {
 590                 $this->mTimestamp = wfTimestamp( TS_MW, $ts );
 591         }
 592
 593         /**
 594          * @param $audience Integer: one of:
 595          *      Revision::FOR_PUBLIC       to be displayed to all users
 596          *      Revision::FOR_THIS_USER    to be displayed to $wgUser
 597          *      Revision::RAW              get the text regardless of permissions
 598          * @return int user ID for the user that made the last article revision
 599          */
 600         public function getUser( $audience = Revision::FOR_PUBLIC ) {
 601                 $this->loadLastEdit();
 602                 if ( $this->mLastRevision ) {
 603                         return $this->mLastRevision->getUser( $audience );
 604                 } else {
 605                         return -1;
 606                 }
 607         }
 608
 609         /**
 610          * @param $audience Integer: one of:
 611          *      Revision::FOR_PUBLIC       to be displayed to all users
 612          *      Revision::FOR_THIS_USER    to be displayed to $wgUser
 613          *      Revision::RAW              get the text regardless of permissions
 614          * @return string username of the user that made the last article revision
 615          */
 616         public function getUserText( $audience = Revision::FOR_PUBLIC ) {
 617                 $this->loadLastEdit();
 618                 if ( $this->mLastRevision ) {
 619                         return $this->mLastRevision->getUserText( $audience );
 620                 } else {
 621                         return '';
 622                 }
 623         }
 624
 625         /**
 626          * @param $audience Integer: one of:
 627          *      Revision::FOR_PUBLIC       to be displayed to all users
 628          *      Revision::FOR_THIS_USER    to be displayed to $wgUser
 629          *      Revision::RAW              get the text regardless of permissions
 630          * @return string Comment stored for the last article revision
 631          */
 632         public function getComment( $audience = Revision::FOR_PUBLIC ) {
 633                 $this->loadLastEdit();
 634                 if ( $this->mLastRevision ) {
 635                         return $this->mLastRevision->getComment( $audience );
 636                 } else {
 637                         return '';
 638                 }
 639         }
 640
 641         /**
 642          * Returns true if last revision was marked as "minor edit"
 643          *
 644          * @return boolean Minor edit indicator for the last article revision.
 645          */
 646         public function getMinorEdit() {
 647                 $this->loadLastEdit();
 648                 if ( $this->mLastRevision ) {
 649                         return $this->mLastRevision->isMinor();
 650                 } else {
 651                         return false;
 652                 }
 653         }
 654
 655         /**
 656          * Get a list of users who have edited this article, not including the user who made
 657          * the most recent revision, which you can get from $article->getUser() if you want it
 658          * @return UserArrayFromResult
 659          */
 660         public function getContributors() {
 661                 # @todo FIXME: This is expensive; cache this info somewhere.
 662
 663                 $dbr = wfGetDB( DB_SLAVE );
 664
 665                 if ( $dbr->implicitGroupby() ) {
 666                         $realNameField = 'user_real_name';
 667                 } else {
 668                         $realNameField = 'FIRST(user_real_name) AS user_real_name';
 669                 }
 670
 671                 $tables = array( 'revision', 'user' );
 672
 673                 $fields = array(
 674                         'rev_user as user_id',
 675                         'rev_user_text AS user_name',
 676                         $realNameField,
 677                         'MAX(rev_timestamp) AS timestamp',
 678                 );
 679
 680                 $conds = array( 'rev_page' => $this->getId() );
 681
 682                 // The user who made the top revision gets credited as "this page was last edited by
 683                 // John, based on contributions by Tom, Dick and Harry", so don't include them twice.
 684                 $user = $this->getUser();
 685                 if ( $user ) {
 686                         $conds[] = "rev_user != $user";
 687                 } else {
 688                         $conds[] = "rev_user_text != {$dbr->addQuotes( $this->getUserText() )}";
 689                 }
 690
 691                 $conds[] = "{$dbr->bitAnd( 'rev_deleted', Revision::DELETED_USER )} = 0"; // username hidden?
 692
 693                 $jconds = array(
 694                         'user' => array( 'LEFT JOIN', 'rev_user = user_id' ),
 695                 );
 696
 697                 $options = array(
 698                         'GROUP BY' => array( 'rev_user', 'rev_user_text' ),
 699                         'ORDER BY' => 'timestamp DESC',
 700                 );
 701
 702                 $res = $dbr->select( $tables, $fields, $conds, __METHOD__, $options, $jconds );
 703                 return new UserArrayFromResult( $res );
 704         }
 705
 706         /**
 707          * Should the parser cache be used?
 708          *
 709          * @param $user User The relevant user
 710          * @return boolean
 711          */
 712         public function isParserCacheUsed( User $user, $oldid ) {
 713                 global $wgEnableParserCache;
 714
 715                 return $wgEnableParserCache
 716                         && $user->getStubThreshold() == 0
 717                         && $this->exists()
 718                         && empty( $oldid )
 719                         && !$this->mTitle->isCssOrJsPage()
 720                         && !$this->mTitle->isCssJsSubpage();
 721         }
 722
 723         /**
 724          * Perform the actions of a page purging
 725          */
 726         public function doPurge() {
 727                 global $wgUseSquid;
 728
 729                 if( !wfRunHooks( 'ArticlePurge', array( &$this ) ) ){
 730                         return false;
 731                 }
 732
 733                 // Invalidate the cache
 734                 $this->mTitle->invalidateCache();
 735                 $this->clear();
 736
 737                 if ( $wgUseSquid ) {
 738                         // Commit the transaction before the purge is sent
 739                         $dbw = wfGetDB( DB_MASTER );
 740                         $dbw->commit();
 741
 742                         // Send purge
 743                         $update = SquidUpdate::newSimplePurge( $this->mTitle );
 744                         $update->doUpdate();
 745                 }
 746
 747                 if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
 748                         if ( $this->getId() == 0 ) {
 749                                 $text = false;
 750                         } else {
 751                                 $text = $this->getRawText();
 752                         }
 753
 754                         MessageCache::singleton()->replace( $this->mTitle->getDBkey(), $text );
 755                 }
 756         }
 757
 758         /**
 759          * Insert a new empty page record for this article.
 760          * This *must* be followed up by creating a revision
 761          * and running $this->updateRevisionOn( ... );
 762          * or else the record will be left in a funky state.
 763          * Best if all done inside a transaction.
 764          *
 765          * @param $dbw DatabaseBase
 766          * @return int The newly created page_id key, or false if the title already existed
 767          * @private
 768          */
 769         public function insertOn( $dbw ) {
 770                 wfProfileIn( __METHOD__ );
 771
 772                 $page_id = $dbw->nextSequenceValue( 'page_page_id_seq' );
 773                 $dbw->insert( 'page', array(
 774                         'page_id'           => $page_id,
 775                         'page_namespace'    => $this->mTitle->getNamespace(),
 776                         'page_title'        => $this->mTitle->getDBkey(),
 777                         'page_counter'      => 0,
 778                         'page_restrictions' => '',
 779                         'page_is_redirect'  => 0, # Will set this shortly...
 780                         'page_is_new'       => 1,
 781                         'page_random'       => wfRandom(),
 782                         'page_touched'      => $dbw->timestamp(),
 783                         'page_latest'       => 0, # Fill this in shortly...
 784                         'page_len'          => 0, # Fill this in shortly...
 785                 ), __METHOD__, 'IGNORE' );
 786
 787                 $affected = $dbw->affectedRows();
 788
 789                 if ( $affected ) {
 790                         $newid = $dbw->insertId();
 791                         $this->mTitle->resetArticleID( $newid );
 792                 }
 793                 wfProfileOut( __METHOD__ );
 794
 795                 return $affected ? $newid : false;
 796         }
 797
 798         /**
 799          * Update the page record to point to a newly saved revision.
 800          *
 801          * @param $dbw DatabaseBase: object
 802          * @param $revision Revision: For ID number, and text used to set
 803                                                 length and redirect status fields
 804          * @param $lastRevision Integer: if given, will not overwrite the page field
 805          *                      when different from the currently set value.
 806          *                      Giving 0 indicates the new page flag should be set
 807          *                      on.
 808          * @param $lastRevIsRedirect Boolean: if given, will optimize adding and
 809          *                           removing rows in redirect table.
 810          * @return bool true on success, false on failure
 811          * @private
 812          */
 813         public function updateRevisionOn( $dbw, $revision, $lastRevision = null, $lastRevIsRedirect = null ) {
 814                 wfProfileIn( __METHOD__ );
 815
 816                 $text = $revision->getText();
 817                 $rt = Title::newFromRedirectRecurse( $text );
 818
 819                 $conditions = array( 'page_id' => $this->getId() );
 820
 821                 if ( !is_null( $lastRevision ) ) {
 822                         # An extra check against threads stepping on each other
 823                         $conditions['page_latest'] = $lastRevision;
 824                 }
 825
 826                 $now = wfTimestampNow();
 827                 $dbw->update( 'page',
 828                         array( /* SET */
 829                                 'page_latest'      => $revision->getId(),
 830                                 'page_touched'     => $dbw->timestamp( $now ),
 831                                 'page_is_new'      => ( $lastRevision === 0 ) ? 1 : 0,
 832                                 'page_is_redirect' => $rt !== null ? 1 : 0,
 833                                 'page_len'         => strlen( $text ),
 834                         ),
 835                         $conditions,
 836                         __METHOD__ );
 837
 838                 $result = $dbw->affectedRows() != 0;
 839                 if ( $result ) {
 840                         $this->updateRedirectOn( $dbw, $rt, $lastRevIsRedirect );
 841                         $this->setCachedLastEditTime( $now );
 842                 }
 843
 844                 wfProfileOut( __METHOD__ );
 845                 return $result;
 846         }
 847
 848         /**
 849          * Get the cached timestamp for the last time the page changed
 850          * @return string MW timestamp
 851          */
 852         protected function getCachedLastEditTime() {
 853                 global $wgMemc;
 854                 $key = wfMemcKey( 'page-lastedit', md5( $this->mTitle->getPrefixedDBkey() ) );
 855                 return $wgMemc->get( $key );
 856         }
 857
 858         /**
 859          * Set the cached timestamp for the last time the page changed
 860          * @param $timestamp string
 861          * @return void
 862          */
 863         protected function setCachedLastEditTime( $timestamp ) {
 864                 global $wgMemc;
 865                 $key = wfMemcKey( 'page-lastedit', md5( $this->mTitle->getPrefixedDBkey() ) );
 866                 $wgMemc->set( $key, wfTimestamp( TS_MW, $timestamp ), 60*15 );
 867         }
 868
 869         /**
 870          * Add row to the redirect table if this is a redirect, remove otherwise.
 871          *
 872          * @param $dbw DatabaseBase
 873          * @param $redirectTitle Title object pointing to the redirect target,
 874          *                       or NULL if this is not a redirect
 875          * @param $lastRevIsRedirect If given, will optimize adding and
 876          *                           removing rows in redirect table.
 877          * @return bool true on success, false on failure
 878          * @private
 879          */
 880         public function updateRedirectOn( $dbw, $redirectTitle, $lastRevIsRedirect = null ) {
 881                 // Always update redirects (target link might have changed)
 882                 // Update/Insert if we don't know if the last revision was a redirect or not
 883                 // Delete if changing from redirect to non-redirect
 884                 $isRedirect = !is_null( $redirectTitle );
 885
 886                 if ( !$isRedirect && !is_null( $lastRevIsRedirect ) && $lastRevIsRedirect === $isRedirect ) {
 887                         return true;
 888                 }
 889
 890                 wfProfileIn( __METHOD__ );
 891                 if ( $isRedirect ) {
 892                         $this->insertRedirectEntry( $redirectTitle );
 893                 } else {
 894                         // This is not a redirect, remove row from redirect table
 895                         $where = array( 'rd_from' => $this->getId() );
 896                         $dbw->delete( 'redirect', $where, __METHOD__ );
 897                 }
 898
 899                 if ( $this->getTitle()->getNamespace() == NS_FILE ) {
 900                         RepoGroup::singleton()->getLocalRepo()->invalidateImageRedirect( $this->getTitle() );
 901                 }
 902                 wfProfileOut( __METHOD__ );
 903
 904                 return ( $dbw->affectedRows() != 0 );
 905         }
 906
 907         /**
 908          * If the given revision is newer than the currently set page_latest,
 909          * update the page record. Otherwise, do nothing.
 910          *
 911          * @param $dbw Database object
 912          * @param $revision Revision object
 913          * @return mixed
 914          */
 915         public function updateIfNewerOn( $dbw, $revision ) {
 916                 wfProfileIn( __METHOD__ );
 917
 918                 $row = $dbw->selectRow(
 919                         array( 'revision', 'page' ),
 920                         array( 'rev_id', 'rev_timestamp', 'page_is_redirect' ),
 921                         array(
 922                                 'page_id' => $this->getId(),
 923                                 'page_latest=rev_id' ),
 924                         __METHOD__ );
 925
 926                 if ( $row ) {
 927                         if ( wfTimestamp( TS_MW, $row->rev_timestamp ) >= $revision->getTimestamp() ) {
 928                                 wfProfileOut( __METHOD__ );
 929                                 return false;
 930                         }
 931                         $prev = $row->rev_id;
 932                         $lastRevIsRedirect = (bool)$row->page_is_redirect;
 933                 } else {
 934                         # No or missing previous revision; mark the page as new
 935                         $prev = 0;
 936                         $lastRevIsRedirect = null;
 937                 }
 938
 939                 $ret = $this->updateRevisionOn( $dbw, $revision, $prev, $lastRevIsRedirect );
 940
 941                 wfProfileOut( __METHOD__ );
 942                 return $ret;
 943         }
 944
 945         /**
 946          * @param $section empty/null/false or a section number (0, 1, 2, T1, T2...)
 947          * @param $text String: new text of the section
 948          * @param $summary String: new section's subject, only if $section is 'new'
 949          * @param $edittime String: revision timestamp or null to use the current revision
 950          * @return string Complete article text, or null if error
 951          */
 952         public function replaceSection( $section, $text, $summary = '', $edittime = null ) {
 953                 wfProfileIn( __METHOD__ );
 954
 955                 if ( strval( $section ) == '' ) {
 956                         // Whole-page edit; let the whole text through
 957                 } else {
 958                         if ( is_null( $edittime ) ) {
 959                                 $rev = Revision::newFromTitle( $this->mTitle );
 960                         } else {
 961                                 $dbw = wfGetDB( DB_MASTER );
 962                                 $rev = Revision::loadFromTimestamp( $dbw, $this->mTitle, $edittime );
 963                         }
 964
 965                         if ( !$rev ) {
 966                                 wfDebug( "WikiPage::replaceSection asked for bogus section (page: " .
 967                                         $this->getId() . "; section: $section; edittime: $edittime)\n" );
 968                                 wfProfileOut( __METHOD__ );
 969                                 return null;
 970                         }
 971
 972                         $oldtext = $rev->getText();
 973
 974                         if ( $section == 'new' ) {
 975                                 # Inserting a new section
 976                                 $subject = $summary ? wfMsgForContent( 'newsectionheaderdefaultlevel', $summary ) . "\n\n" : '';
 977                                 $text = strlen( trim( $oldtext ) ) > 0
 978                                                 ? "{$oldtext}\n\n{$subject}{$text}"
 979                                                 : "{$subject}{$text}";
 980                         } else {
 981                                 # Replacing an existing section; roll out the big guns
 982                                 global $wgParser;
 983
 984                                 $text = $wgParser->replaceSection( $oldtext, $section, $text );
 985                         }
 986                 }
 987
 988                 wfProfileOut( __METHOD__ );
 989                 return $text;
 990         }
 991
 992         /**
 993          * Check flags and add EDIT_NEW or EDIT_UPDATE to them as needed.
 994          * @param $flags Int
 995          * @return Int updated $flags
 996          */
 997         function checkFlags( $flags ) {
 998                 if ( !( $flags & EDIT_NEW ) && !( $flags & EDIT_UPDATE ) ) {
 999                         if ( $this->mTitle->getArticleID() ) {
1000                                 $flags |= EDIT_UPDATE;
1001                         } else {
1002                                 $flags |= EDIT_NEW;
1003                         }
1004                 }
1005
1006                 return $flags;
1007         }
1008
1009         /**
1010          * Change an existing article or create a new article. Updates RC and all necessary caches,
1011          * optionally via the deferred update array.
1012          *
1013          * @param $text String: new text
1014          * @param $summary String: edit summary
1015          * @param $flags Integer bitfield:
1016          *      EDIT_NEW
1017          *          Article is known or assumed to be non-existent, create a new one
1018          *      EDIT_UPDATE
1019          *          Article is known or assumed to be pre-existing, update it
1020          *      EDIT_MINOR
1021          *          Mark this edit minor, if the user is allowed to do so
1022          *      EDIT_SUPPRESS_RC
1023          *          Do not log the change in recentchanges
1024          *      EDIT_FORCE_BOT
1025          *          Mark the edit a "bot" edit regardless of user rights
1026          *      EDIT_DEFER_UPDATES
1027          *          Defer some of the updates until the end of index.php
1028          *      EDIT_AUTOSUMMARY
1029          *          Fill in blank summaries with generated text where possible
1030          *
1031          * If neither EDIT_NEW nor EDIT_UPDATE is specified, the status of the article will be detected.
1032          * If EDIT_UPDATE is specified and the article doesn't exist, the function will an
1033          * edit-gone-missing error. If EDIT_NEW is specified and the article does exist, an
1034          * edit-already-exists error will be returned. These two conditions are also possible with
1035          * auto-detection due to MediaWiki's performance-optimised locking strategy.
1036          *
1037          * @param $baseRevId the revision ID this edit was based off, if any
1038          * @param $user User the user doing the edit
1039          *
1040          * @return Status object. Possible errors:
1041          *     edit-hook-aborted:       The ArticleSave hook aborted the edit but didn't set the fatal flag of $status
1042          *     edit-gone-missing:       In update mode, but the article didn't exist
1043          *     edit-conflict:           In update mode, the article changed unexpectedly
1044          *     edit-no-change:          Warning that the text was the same as before
1045          *     edit-already-exists:     In creation mode, but the article already exists
1046          *
1047          *  Extensions may define additional errors.
1048          *
1049          *  $return->value will contain an associative array with members as follows:
1050          *     new:                     Boolean indicating if the function attempted to create a new article
1051          *     revision:                The revision object for the inserted revision, or null
1052          *
1053          *  Compatibility note: this function previously returned a boolean value indicating success/failure
1054          */
1055         public function doEdit( $text, $summary, $flags = 0, $baseRevId = false, $user = null ) {
1056                 global $wgUser, $wgDBtransactions, $wgUseAutomaticEditSummaries;
1057
1058                 # Low-level sanity check
1059                 if ( $this->mTitle->getText() === '' ) {
1060                         throw new MWException( 'Something is trying to edit an article with an empty title' );
1061                 }
1062
1063                 wfProfileIn( __METHOD__ );
1064
1065                 $user = is_null( $user ) ? $wgUser : $user;
1066                 $status = Status::newGood( array() );
1067
1068                 # Load $this->mTitle->getArticleID() and $this->mLatest if it's not already
1069                 $this->loadPageData();
1070
1071                 $flags = $this->checkFlags( $flags );
1072
1073                 if ( !wfRunHooks( 'ArticleSave', array( &$this, &$user, &$text, &$summary,
1074                         $flags & EDIT_MINOR, null, null, &$flags, &$status ) ) )
1075                 {
1076                         wfDebug( __METHOD__ . ": ArticleSave hook aborted save!\n" );
1077
1078                         if ( $status->isOK() ) {
1079                                 $status->fatal( 'edit-hook-aborted' );
1080                         }
1081
1082                         wfProfileOut( __METHOD__ );
1083                         return $status;
1084                 }
1085
1086                 # Silently ignore EDIT_MINOR if not allowed
1087                 $isminor = ( $flags & EDIT_MINOR ) && $user->isAllowed( 'minoredit' );
1088                 $bot = $flags & EDIT_FORCE_BOT;
1089
1090                 $oldtext = $this->getRawText(); // current revision
1091                 $oldsize = strlen( $oldtext );
1092                 $oldcountable = $this->isCountable();
1093
1094                 # Provide autosummaries if one is not provided and autosummaries are enabled.
1095                 if ( $wgUseAutomaticEditSummaries && $flags & EDIT_AUTOSUMMARY && $summary == '' ) {
1096                         $summary = $this->getAutosummary( $oldtext, $text, $flags );
1097                 }
1098
1099                 $editInfo = $this->prepareTextForEdit( $text, null, $user );
1100                 $text = $editInfo->pst;
1101                 $newsize = strlen( $text );
1102
1103                 $dbw = wfGetDB( DB_MASTER );
1104                 $now = wfTimestampNow();
1105                 $this->mTimestamp = $now;
1106
1107                 if ( $flags & EDIT_UPDATE ) {
1108                         # Update article, but only if changed.
1109                         $status->value['new'] = false;
1110
1111                         # Make sure the revision is either completely inserted or not inserted at all
1112                         if ( !$wgDBtransactions ) {
1113                                 $userAbort = ignore_user_abort( true );
1114                         }
1115
1116                         $revision = new Revision( array(
1117                                 'page'       => $this->getId(),
1118                                 'comment'    => $summary,
1119                                 'minor_edit' => $isminor,
1120                                 'text'       => $text,
1121                                 'parent_id'  => $this->mLatest,
1122                                 'user'       => $user->getId(),
1123                                 'user_text'  => $user->getName(),
1124                                 'timestamp'  => $now
1125                         ) );
1126
1127                         $changed = ( strcmp( $text, $oldtext ) != 0 );
1128
1129                         if ( $changed ) {
1130                                 if ( !$this->mLatest ) {
1131                                         # Article gone missing
1132                                         wfDebug( __METHOD__ . ": EDIT_UPDATE specified but article doesn't exist\n" );
1133                                         $status->fatal( 'edit-gone-missing' );
1134
1135                                         wfProfileOut( __METHOD__ );
1136                                         return $status;
1137                                 }
1138
1139                                 $dbw->begin();
1140                                 $revisionId = $revision->insertOn( $dbw );
1141
1142                                 # Update page
1143                                 #
1144                                 # Note that we use $this->mLatest instead of fetching a value from the master DB
1145                                 # during the course of this function. This makes sure that EditPage can detect
1146                                 # edit conflicts reliably, either by $ok here, or by $article->getTimestamp()
1147                                 # before this function is called. A previous function used a separate query, this
1148                                 # creates a window where concurrent edits can cause an ignored edit conflict.
1149                                 $ok = $this->updateRevisionOn( $dbw, $revision, $this->mLatest );
1150
1151                                 if ( !$ok ) {
1152                                         /* Belated edit conflict! Run away!! */
1153                                         $status->fatal( 'edit-conflict' );
1154
1155                                         # Delete the invalid revision if the DB is not transactional
1156                                         if ( !$wgDBtransactions ) {
1157                                                 $dbw->delete( 'revision', array( 'rev_id' => $revisionId ), __METHOD__ );
1158                                         }
1159
1160                                         $revisionId = 0;
1161                                         $dbw->rollback();
1162                                 } else {
1163                                         global $wgUseRCPatrol;
1164                                         wfRunHooks( 'NewRevisionFromEditComplete', array( $this, $revision, $baseRevId, $user ) );
1165                                         # Update recentchanges
1166                                         if ( !( $flags & EDIT_SUPPRESS_RC ) ) {
1167                                                 # Mark as patrolled if the user can do so
1168                                                 $patrolled = $wgUseRCPatrol && !count(
1169                                                         $this->mTitle->getUserPermissionsErrors( 'autopatrol', $user ) );
1170                                                 # Add RC row to the DB
1171                                                 $rc = RecentChange::notifyEdit( $now, $this->mTitle, $isminor, $user, $summary,
1172                                                         $this->mLatest, $this->getTimestamp(), $bot, '', $oldsize, $newsize,
1173                                                         $revisionId, $patrolled
1174                                                 );
1175
1176                                                 # Log auto-patrolled edits
1177                                                 if ( $patrolled ) {
1178                                                         PatrolLog::record( $rc, true );
1179                                                 }
1180                                         }
1181                                         $user->incEditCount();
1182                                         $dbw->commit();
1183                                 }
1184                         }
1185
1186                         if ( !$wgDBtransactions ) {
1187                                 ignore_user_abort( $userAbort );
1188                         }
1189
1190                         // Now that ignore_user_abort is restored, we can respond to fatal errors
1191                         if ( !$status->isOK() ) {
1192                                 wfProfileOut( __METHOD__ );
1193                                 return $status;
1194                         }
1195
1196                         # Update links tables, site stats, etc.
1197                         $this->doEditUpdates( $revision, $user, array( 'changed' => $changed,
1198                                 'oldcountable' => $oldcountable ) );
1199
1200                         if ( !$changed ) {
1201                                 $status->warning( 'edit-no-change' );
1202                                 $revision = null;
1203                                 // Keep the same revision ID, but do some updates on it
1204                                 $revisionId = $this->getLatest();
1205                                 // Update page_touched, this is usually implicit in the page update
1206                                 // Other cache updates are done in onArticleEdit()
1207                                 $this->mTitle->invalidateCache();
1208                         }
1209                 } else {
1210                         # Create new article
1211                         $status->value['new'] = true;
1212
1213                         $dbw->begin();
1214
1215                         # Add the page record; stake our claim on this title!
1216                         # This will return false if the article already exists
1217                         $newid = $this->insertOn( $dbw );
1218
1219                         if ( $newid === false ) {
1220                                 $dbw->rollback();
1221                                 $status->fatal( 'edit-already-exists' );
1222
1223                                 wfProfileOut( __METHOD__ );
1224                                 return $status;
1225                         }
1226
1227                         # Save the revision text...
1228                         $revision = new Revision( array(
1229                                 'page'       => $newid,
1230                                 'comment'    => $summary,
1231                                 'minor_edit' => $isminor,
1232                                 'text'       => $text,
1233                                 'user'       => $user->getId(),
1234                                 'user_text'  => $user->getName(),
1235                                 'timestamp'  => $now
1236                         ) );
1237                         $revisionId = $revision->insertOn( $dbw );
1238
1239                         $this->mTitle->resetArticleID( $newid );
1240                         # Update the LinkCache. Resetting the Title ArticleID means it will rely on having that already cached
1241                         # @todo FIXME?
1242                         LinkCache::singleton()->addGoodLinkObj( $newid, $this->mTitle, strlen( $text ), (bool)Title::newFromRedirect( $text ), $revisionId );
1243
1244                         # Update the page record with revision data
1245                         $this->updateRevisionOn( $dbw, $revision, 0 );
1246
1247                         wfRunHooks( 'NewRevisionFromEditComplete', array( $this, $revision, false, $user ) );
1248
1249                         # Update recentchanges
1250                         if ( !( $flags & EDIT_SUPPRESS_RC ) ) {
1251                                 global $wgUseRCPatrol, $wgUseNPPatrol;
1252
1253                                 # Mark as patrolled if the user can do so
1254                                 $patrolled = ( $wgUseRCPatrol || $wgUseNPPatrol ) && !count(
1255                                         $this->mTitle->getUserPermissionsErrors( 'autopatrol', $user ) );
1256                                 # Add RC row to the DB
1257                                 $rc = RecentChange::notifyNew( $now, $this->mTitle, $isminor, $user, $summary, $bot,
1258                                         '', strlen( $text ), $revisionId, $patrolled );
1259
1260                                 # Log auto-patrolled edits
1261                                 if ( $patrolled ) {
1262                                         PatrolLog::record( $rc, true );
1263                                 }
1264                         }
1265                         $user->incEditCount();
1266                         $dbw->commit();
1267
1268                         # Update links, etc.
1269                         $this->doEditUpdates( $revision, $user, array( 'created' => true ) );
1270
1271                         wfRunHooks( 'ArticleInsertComplete', array( &$this, &$user, $text, $summary,
1272                                 $flags & EDIT_MINOR, null, null, &$flags, $revision ) );
1273                 }
1274
1275                 # Do updates right now unless deferral was requested
1276                 if ( !( $flags & EDIT_DEFER_UPDATES ) ) {
1277                         wfDoUpdates();
1278                 }
1279
1280                 // Return the new revision (or null) to the caller
1281                 $status->value['revision'] = $revision;
1282
1283                 wfRunHooks( 'ArticleSaveComplete', array( &$this, &$user, $text, $summary,
1284                         $flags & EDIT_MINOR, null, null, &$flags, $revision, &$status, $baseRevId ) );
1285
1286                 # Promote user to any groups they meet the criteria for
1287                 $user->addAutopromoteOnceGroups( 'onEdit' );
1288
1289                 wfProfileOut( __METHOD__ );
1290                 return $status;
1291         }
1292
1293         /**
1294          * Update the article's restriction field, and leave a log entry.
1295          *
1296          * @param $limit Array: set of restriction keys
1297          * @param $reason String
1298          * @param &$cascade Integer. Set to false if cascading protection isn't allowed.
1299          * @param $expiry Array: per restriction type expiration
1300          * @param $user User The user updating the restrictions
1301          * @return bool true on success
1302          */
1303         public function updateRestrictions(
1304                 $limit = array(), $reason = '', &$cascade = 0, $expiry = array(), User $user = null
1305         ) {
1306                 global $wgUser, $wgContLang;
1307                 $user = is_null( $user ) ? $wgUser : $user;
1308
1309                 $restrictionTypes = $this->mTitle->getRestrictionTypes();
1310
1311                 $id = $this->mTitle->getArticleID();
1312
1313                 if ( $id <= 0 ) {
1314                         wfDebug( "updateRestrictions failed: article id $id <= 0\n" );
1315                         return false;
1316                 }
1317
1318                 if ( wfReadOnly() ) {
1319                         wfDebug( "updateRestrictions failed: read-only\n" );
1320                         return false;
1321                 }
1322
1323                 if ( count( $this->mTitle->getUserPermissionsErrors( 'protect', $user ) ) ) {
1324                         wfDebug( "updateRestrictions failed: insufficient permissions\n" );
1325                         return false;
1326                 }
1327
1328                 if ( !$cascade ) {
1329                         $cascade = false;
1330                 }
1331
1332                 // Take this opportunity to purge out expired restrictions
1333                 Title::purgeExpiredRestrictions();
1334
1335                 # @todo FIXME: Same limitations as described in ProtectionForm.php (line 37);
1336                 # we expect a single selection, but the schema allows otherwise.
1337                 $current = array();
1338                 $updated = self::flattenRestrictions( $limit );
1339                 $changed = false;
1340
1341                 foreach ( $restrictionTypes as $action ) {
1342                         if ( isset( $expiry[$action] ) ) {
1343                                 # Get current restrictions on $action
1344                                 $aLimits = $this->mTitle->getRestrictions( $action );
1345                                 $current[$action] = implode( '', $aLimits );
1346                                 # Are any actual restrictions being dealt with here?
1347                                 $aRChanged = count( $aLimits ) || !empty( $limit[$action] );
1348
1349                                 # If something changed, we need to log it. Checking $aRChanged
1350                                 # assures that "unprotecting" a page that is not protected does
1351                                 # not log just because the expiry was "changed".
1352                                 if ( $aRChanged &&
1353                                         $this->mTitle->getRestrictionExpiry( $action ) != $expiry[$action] )
1354                                 {
1355                                         $changed = true;
1356                                 }
1357                         }
1358                 }
1359
1360                 $current = self::flattenRestrictions( $current );
1361
1362                 $changed = ( $changed || $current != $updated );
1363                 $changed = $changed || ( $updated && $this->mTitle->areRestrictionsCascading() != $cascade );
1364                 $protect = ( $updated != '' );
1365
1366                 # If nothing's changed, do nothing
1367                 if ( $changed ) {
1368                         if ( wfRunHooks( 'ArticleProtect', array( &$this, &$user, $limit, $reason ) ) ) {
1369                                 $dbw = wfGetDB( DB_MASTER );
1370
1371                                 # Prepare a null revision to be added to the history
1372                                 $modified = $current != '' && $protect;
1373
1374                                 if ( $protect ) {
1375                                         $comment_type = $modified ? 'modifiedarticleprotection' : 'protectedarticle';
1376                                 } else {
1377                                         $comment_type = 'unprotectedarticle';
1378                                 }
1379
1380                                 $comment = $wgContLang->ucfirst( wfMsgForContent( $comment_type, $this->mTitle->getPrefixedText() ) );
1381
1382                                 # Only restrictions with the 'protect' right can cascade...
1383                                 # Otherwise, people who cannot normally protect can "protect" pages via transclusion
1384                                 $editrestriction = isset( $limit['edit'] ) ? array( $limit['edit'] ) : $this->mTitle->getRestrictions( 'edit' );
1385
1386                                 # The schema allows multiple restrictions
1387                                 if ( !in_array( 'protect', $editrestriction ) && !in_array( 'sysop', $editrestriction ) ) {
1388                                         $cascade = false;
1389                                 }
1390
1391                                 $cascade_description = '';
1392
1393                                 if ( $cascade ) {
1394                                         $cascade_description = ' [' . wfMsgForContent( 'protect-summary-cascade' ) . ']';
1395                                 }
1396
1397                                 if ( $reason ) {
1398                                         $comment .= ": $reason";
1399                                 }
1400
1401                                 $editComment = $comment;
1402                                 $encodedExpiry = array();
1403                                 $protect_description = '';
1404                                 foreach ( $limit as $action => $restrictions ) {
1405                                         if ( !isset( $expiry[$action] ) )
1406                                                 $expiry[$action] = $dbw->getInfinity();
1407
1408                                         $encodedExpiry[$action] = $dbw->encodeExpiry( $expiry[$action] );
1409                                         if ( $restrictions != '' ) {
1410                                                 $protect_description .= "[$action=$restrictions] (";
1411                                                 if ( $encodedExpiry[$action] != 'infinity' ) {
1412                                                         $protect_description .= wfMsgForContent( 'protect-expiring',
1413                                                                 $wgContLang->timeanddate( $expiry[$action], false, false ) ,
1414                                                                 $wgContLang->date( $expiry[$action], false, false ) ,
1415                                                                 $wgContLang->time( $expiry[$action], false, false ) );
1416                                                 } else {
1417                                                         $protect_description .= wfMsgForContent( 'protect-expiry-indefinite' );
1418                                                 }
1419
1420                                                 $protect_description .= ') ';
1421                                         }
1422                                 }
1423                                 $protect_description = trim( $protect_description );
1424
1425                                 if ( $protect_description && $protect ) {
1426                                         $editComment .= " ($protect_description)";
1427                                 }
1428
1429                                 if ( $cascade ) {
1430                                         $editComment .= "$cascade_description";
1431                                 }
1432
1433                                 # Update restrictions table
1434                                 foreach ( $limit as $action => $restrictions ) {
1435                                         if ( $restrictions != '' ) {
1436                                                 $dbw->replace( 'page_restrictions', array( array( 'pr_page', 'pr_type' ) ),
1437                                                         array( 'pr_page' => $id,
1438                                                                 'pr_type' => $action,
1439                                                                 'pr_level' => $restrictions,
1440                                                                 'pr_cascade' => ( $cascade && $action == 'edit' ) ? 1 : 0,
1441                                                                 'pr_expiry' => $encodedExpiry[$action]
1442                                                         ),
1443                                                         __METHOD__
1444                                                 );
1445                                         } else {
1446                                                 $dbw->delete( 'page_restrictions', array( 'pr_page' => $id,
1447                                                         'pr_type' => $action ), __METHOD__ );
1448                                         }
1449                                 }
1450
1451                                 # Insert a null revision
1452                                 $nullRevision = Revision::newNullRevision( $dbw, $id, $editComment, true );
1453                                 $nullRevId = $nullRevision->insertOn( $dbw );
1454
1455                                 $latest = $this->getLatest();
1456                                 # Update page record
1457                                 $dbw->update( 'page',
1458                                         array( /* SET */
1459                                                 'page_touched' => $dbw->timestamp(),
1460                                                 'page_restrictions' => '',
1461                                                 'page_latest' => $nullRevId
1462                                         ), array( /* WHERE */
1463                                                 'page_id' => $id
1464                                         ), __METHOD__
1465                                 );
1466
1467                                 wfRunHooks( 'NewRevisionFromEditComplete', array( $this, $nullRevision, $latest, $user ) );
1468                                 wfRunHooks( 'ArticleProtectComplete', array( &$this, &$user, $limit, $reason ) );
1469
1470                                 # Update the protection log
1471                                 $log = new LogPage( 'protect' );
1472                                 if ( $protect ) {
1473                                         $params = array( $protect_description, $cascade ? 'cascade' : '' );
1474                                         $log->addEntry( $modified ? 'modify' : 'protect', $this->mTitle, trim( $reason ), $params );
1475                                 } else {
1476                                         $log->addEntry( 'unprotect', $this->mTitle, $reason );
1477                                 }
1478                         } # End hook
1479                 } # End "changed" check
1480
1481                 return true;
1482         }
1483
1484         /**
1485          * Take an array of page restrictions and flatten it to a string
1486          * suitable for insertion into the page_restrictions field.
1487          * @param $limit Array
1488          * @return String
1489          */
1490         protected static function flattenRestrictions( $limit ) {
1491                 if ( !is_array( $limit ) ) {
1492                         throw new MWException( 'WikiPage::flattenRestrictions given non-array restriction set' );
1493                 }
1494
1495                 $bits = array();
1496                 ksort( $limit );
1497
1498                 foreach ( $limit as $action => $restrictions ) {
1499                         if ( $restrictions != '' ) {
1500                                 $bits[] = "$action=$restrictions";
1501                         }
1502                 }
1503
1504                 return implode( ':', $bits );
1505         }
1506
1507         /**
1508          * @return bool whether or not the page surpasses $wgDeleteRevisionsLimit revisions
1509          */
1510         public function isBigDeletion() {
1511                 global $wgDeleteRevisionsLimit;
1512
1513                 if ( $wgDeleteRevisionsLimit ) {
1514                         $revCount = $this->estimateRevisionCount();
1515
1516                         return $revCount > $wgDeleteRevisionsLimit;
1517                 }
1518
1519                 return false;
1520         }
1521
1522         /**
1523          * @return int approximate revision count
1524          */
1525         public function estimateRevisionCount() {
1526                 $dbr = wfGetDB( DB_SLAVE );
1527
1528                 // For an exact count...
1529                 // return $dbr->selectField( 'revision', 'COUNT(*)',
1530                 //      array( 'rev_page' => $this->getId() ), __METHOD__ );
1531                 return $dbr->estimateRowCount( 'revision', '*',
1532                         array( 'rev_page' => $this->getId() ), __METHOD__ );
1533         }
1534
1535         /**
1536          * Get the last N authors
1537          * @param $num Integer: number of revisions to get
1538          * @param $revLatest String: the latest rev_id, selected from the master (optional)
1539          * @return array Array of authors, duplicates not removed
1540          */
1541         public function getLastNAuthors( $num, $revLatest = 0 ) {
1542                 wfProfileIn( __METHOD__ );
1543                 // First try the slave
1544                 // If that doesn't have the latest revision, try the master
1545                 $continue = 2;
1546                 $db = wfGetDB( DB_SLAVE );
1547
1548                 do {
1549                         $res = $db->select( array( 'page', 'revision' ),
1550                                 array( 'rev_id', 'rev_user_text' ),
1551                                 array(
1552                                         'page_namespace' => $this->mTitle->getNamespace(),
1553                                         'page_title' => $this->mTitle->getDBkey(),
1554                                         'rev_page = page_id'
1555                                 ), __METHOD__,
1556                                 array(
1557                                         'ORDER BY' => 'rev_timestamp DESC',
1558                                         'LIMIT' => $num
1559                                 )
1560                         );
1561
1562                         if ( !$res ) {
1563                                 wfProfileOut( __METHOD__ );
1564                                 return array();
1565                         }
1566
1567                         $row = $db->fetchObject( $res );
1568
1569                         if ( $continue == 2 && $revLatest && $row->rev_id != $revLatest ) {
1570                                 $db = wfGetDB( DB_MASTER );
1571                                 $continue--;
1572                         } else {
1573                                 $continue = 0;
1574                         }
1575                 } while ( $continue );
1576
1577                 $authors = array( $row->rev_user_text );
1578
1579                 foreach ( $res as $row ) {
1580                         $authors[] = $row->rev_user_text;
1581                 }
1582
1583                 wfProfileOut( __METHOD__ );
1584                 return $authors;
1585         }
1586
1587         /**
1588          * Back-end article deletion
1589          * Deletes the article with database consistency, writes logs, purges caches
1590          *
1591          * @param $reason string delete reason for deletion log
1592          * @param suppress bitfield
1593          *      Revision::DELETED_TEXT
1594          *      Revision::DELETED_COMMENT
1595          *      Revision::DELETED_USER
1596          *      Revision::DELETED_RESTRICTED
1597          * @param $id int article ID
1598          * @param $commit boolean defaults to true, triggers transaction end
1599          * @param &$errors Array of errors to append to
1600          * @param $user User The relevant user
1601          * @return boolean true if successful
1602          */
1603         public function doDeleteArticle(
1604                 $reason, $suppress = false, $id = 0, $commit = true, &$error = '', User $user = null
1605         ) {
1606                 global $wgDeferredUpdateList, $wgUseTrackbacks, $wgUser;
1607                 $user = is_null( $user ) ? $wgUser : $user;
1608
1609                 wfDebug( __METHOD__ . "\n" );
1610
1611                 if ( ! wfRunHooks( 'ArticleDelete', array( &$this, &$user, &$reason, &$error ) ) ) {
1612                         return false;
1613                 }
1614                 $dbw = wfGetDB( DB_MASTER );
1615                 $t = $this->mTitle->getDBkey();
1616                 $id = $id ? $id : $this->mTitle->getArticleID( Title::GAID_FOR_UPDATE );
1617
1618                 if ( $t === '' || $id == 0 ) {
1619                         return false;
1620                 }
1621
1622                 $u = new SiteStatsUpdate( 0, 1, - (int)$this->isCountable(), -1 );
1623                 array_push( $wgDeferredUpdateList, $u );
1624
1625                 // Bitfields to further suppress the content
1626                 if ( $suppress ) {
1627                         $bitfield = 0;
1628                         // This should be 15...
1629                         $bitfield |= Revision::DELETED_TEXT;
1630                         $bitfield |= Revision::DELETED_COMMENT;
1631                         $bitfield |= Revision::DELETED_USER;
1632                         $bitfield |= Revision::DELETED_RESTRICTED;
1633                 } else {
1634                         $bitfield = 'rev_deleted';
1635                 }
1636
1637                 $dbw->begin();
1638                 // For now, shunt the revision data into the archive table.
1639                 // Text is *not* removed from the text table; bulk storage
1640                 // is left intact to avoid breaking block-compression or
1641                 // immutable storage schemes.
1642                 //
1643                 // For backwards compatibility, note that some older archive
1644                 // table entries will have ar_text and ar_flags fields still.
1645                 //
1646                 // In the future, we may keep revisions and mark them with
1647                 // the rev_deleted field, which is reserved for this purpose.
1648                 $dbw->insertSelect( 'archive', array( 'page', 'revision' ),
1649                         array(
1650                                 'ar_namespace'  => 'page_namespace',
1651                                 'ar_title'      => 'page_title',
1652                                 'ar_comment'    => 'rev_comment',
1653                                 'ar_user'       => 'rev_user',
1654                                 'ar_user_text'  => 'rev_user_text',
1655                                 'ar_timestamp'  => 'rev_timestamp',
1656                                 'ar_minor_edit' => 'rev_minor_edit',
1657                                 'ar_rev_id'     => 'rev_id',
1658                                 'ar_parent_id'  => 'rev_parent_id',
1659                                 'ar_text_id'    => 'rev_text_id',
1660                                 'ar_text'       => '\'\'', // Be explicit to appease
1661                                 'ar_flags'      => '\'\'', // MySQL's "strict mode"...
1662                                 'ar_len'        => 'rev_len',
1663                                 'ar_page_id'    => 'page_id',
1664                                 'ar_deleted'    => $bitfield
1665                         ), array(
1666                                 'page_id' => $id,
1667                                 'page_id = rev_page'
1668                         ), __METHOD__
1669                 );
1670
1671                 # Delete restrictions for it
1672                 $dbw->delete( 'page_restrictions', array ( 'pr_page' => $id ), __METHOD__ );
1673
1674                 # Now that it's safely backed up, delete it
1675                 $dbw->delete( 'page', array( 'page_id' => $id ), __METHOD__ );
1676                 $ok = ( $dbw->affectedRows() > 0 ); // getArticleId() uses slave, could be laggy
1677
1678                 if ( !$ok ) {
1679                         $dbw->rollback();
1680                         return false;
1681                 }
1682
1683                 # Fix category table counts
1684                 $cats = array();
1685                 $res = $dbw->select( 'categorylinks', 'cl_to', array( 'cl_from' => $id ), __METHOD__ );
1686
1687                 foreach ( $res as $row ) {
1688                         $cats [] = $row->cl_to;
1689                 }
1690
1691                 $this->updateCategoryCounts( array(), $cats );
1692
1693                 # If using cascading deletes, we can skip some explicit deletes
1694                 if ( !$dbw->cascadingDeletes() ) {
1695                         $dbw->delete( 'revision', array( 'rev_page' => $id ), __METHOD__ );
1696
1697                         if ( $wgUseTrackbacks )
1698                                 $dbw->delete( 'trackbacks', array( 'tb_page' => $id ), __METHOD__ );
1699
1700                         # Delete outgoing links
1701                         $dbw->delete( 'pagelinks', array( 'pl_from' => $id ) );
1702                         $dbw->delete( 'imagelinks', array( 'il_from' => $id ) );
1703                         $dbw->delete( 'categorylinks', array( 'cl_from' => $id ) );
1704                         $dbw->delete( 'templatelinks', array( 'tl_from' => $id ) );
1705                         $dbw->delete( 'externallinks', array( 'el_from' => $id ) );
1706                         $dbw->delete( 'langlinks', array( 'll_from' => $id ) );
1707                         $dbw->delete( 'iwlinks', array( 'iwl_from' => $id ) );
1708                         $dbw->delete( 'redirect', array( 'rd_from' => $id ) );
1709                 }
1710
1711                 # If using cleanup triggers, we can skip some manual deletes
1712                 if ( !$dbw->cleanupTriggers() ) {
1713                         # Clean up recentchanges entries...
1714                         $dbw->delete( 'recentchanges',
1715                                 array( 'rc_type != ' . RC_LOG,
1716                                         'rc_namespace' => $this->mTitle->getNamespace(),
1717                                         'rc_title' => $this->mTitle->getDBkey() ),
1718                                 __METHOD__ );
1719                         $dbw->delete( 'recentchanges',
1720                                 array( 'rc_type != ' . RC_LOG, 'rc_cur_id' => $id ),
1721                                 __METHOD__ );
1722                 }
1723
1724                 # Clear caches
1725                 self::onArticleDelete( $this->mTitle );
1726
1727                 # Clear the cached article id so the interface doesn't act like we exist
1728                 $this->mTitle->resetArticleID( 0 );
1729
1730                 # Log the deletion, if the page was suppressed, log it at Oversight instead
1731                 $logtype = $suppress ? 'suppress' : 'delete';
1732                 $log = new LogPage( $logtype );
1733
1734                 # Make sure logging got through
1735                 $log->addEntry( 'delete', $this->mTitle, $reason, array() );
1736
1737                 if ( $commit ) {
1738                         $dbw->commit();
1739                 }
1740
1741                 wfRunHooks( 'ArticleDeleteComplete', array( &$this, &$user, $reason, $id ) );
1742                 return true;
1743         }
1744
1745         /**
1746          * Roll back the most recent consecutive set of edits to a page
1747          * from the same user; fails if there are no eligible edits to
1748          * roll back to, e.g. user is the sole contributor. This function
1749          * performs permissions checks on $user, then calls commitRollback()
1750          * to do the dirty work
1751          *
1752          * @param $fromP String: Name of the user whose edits to rollback.
1753          * @param $summary String: Custom summary. Set to default summary if empty.
1754          * @param $token String: Rollback token.
1755          * @param $bot Boolean: If true, mark all reverted edits as bot.
1756          *
1757          * @param $resultDetails Array: contains result-specific array of additional values
1758          *    'alreadyrolled' : 'current' (rev)
1759          *    success        : 'summary' (str), 'current' (rev), 'target' (rev)
1760          *
1761          * @param $user User The user performing the rollback
1762          * @return array of errors, each error formatted as
1763          *   array(messagekey, param1, param2, ...).
1764          * On success, the array is empty.  This array can also be passed to
1765          * OutputPage::showPermissionsErrorPage().
1766          */
1767         public function doRollback(
1768                 $fromP, $summary, $token, $bot, &$resultDetails, User $user
1769         ) {
1770                 $resultDetails = null;
1771
1772                 # Check permissions
1773                 $editErrors = $this->mTitle->getUserPermissionsErrors( 'edit', $user );
1774                 $rollbackErrors = $this->mTitle->getUserPermissionsErrors( 'rollback', $user );
1775                 $errors = array_merge( $editErrors, wfArrayDiff2( $rollbackErrors, $editErrors ) );
1776
1777                 if ( !$user->matchEditToken( $token, array( $this->mTitle->getPrefixedText(), $fromP ) ) ) {
1778                         $errors[] = array( 'sessionfailure' );
1779                 }
1780
1781                 if ( $user->pingLimiter( 'rollback' ) || $user->pingLimiter() ) {
1782                         $errors[] = array( 'actionthrottledtext' );
1783                 }
1784
1785                 # If there were errors, bail out now
1786                 if ( !empty( $errors ) ) {
1787                         return $errors;
1788                 }
1789
1790                 return $this->commitRollback( $fromP, $summary, $bot, $resultDetails, $user );
1791         }
1792
1793         /**
1794          * Backend implementation of doRollback(), please refer there for parameter
1795          * and return value documentation
1796          *
1797          * NOTE: This function does NOT check ANY permissions, it just commits the
1798          * rollback to the DB Therefore, you should only call this function direct-
1799          * ly if you want to use custom permissions checks. If you don't, use
1800          * doRollback() instead.
1801          * @param $fromP String: Name of the user whose edits to rollback.
1802          * @param $summary String: Custom summary. Set to default summary if empty.
1803          * @param $bot Boolean: If true, mark all reverted edits as bot.
1804          *
1805          * @param $resultDetails Array: contains result-specific array of additional values
1806          * @param $guser User The user performing the rollback
1807          */
1808         public function commitRollback( $fromP, $summary, $bot, &$resultDetails, User $guser ) {
1809                 global $wgUseRCPatrol, $wgContLang;
1810
1811                 $dbw = wfGetDB( DB_MASTER );
1812
1813                 if ( wfReadOnly() ) {
1814                         return array( array( 'readonlytext' ) );
1815                 }
1816
1817                 # Get the last editor
1818                 $current = Revision::newFromTitle( $this->mTitle );
1819                 if ( is_null( $current ) ) {
1820                         # Something wrong... no page?
1821                         return array( array( 'notanarticle' ) );
1822                 }
1823
1824                 $from = str_replace( '_', ' ', $fromP );
1825                 # User name given should match up with the top revision.
1826                 # If the user was deleted then $from should be empty.
1827                 if ( $from != $current->getUserText() ) {
1828                         $resultDetails = array( 'current' => $current );
1829                         return array( array( 'alreadyrolled',
1830                                 htmlspecialchars( $this->mTitle->getPrefixedText() ),
1831                                 htmlspecialchars( $fromP ),
1832                                 htmlspecialchars( $current->getUserText() )
1833                         ) );
1834                 }
1835
1836                 # Get the last edit not by this guy...
1837                 # Note: these may not be public values
1838                 $user = intval( $current->getRawUser() );
1839                 $user_text = $dbw->addQuotes( $current->getRawUserText() );
1840                 $s = $dbw->selectRow( 'revision',
1841                         array( 'rev_id', 'rev_timestamp', 'rev_deleted' ),
1842                         array( 'rev_page' => $current->getPage(),
1843                                 "rev_user != {$user} OR rev_user_text != {$user_text}"
1844                         ), __METHOD__,
1845                         array( 'USE INDEX' => 'page_timestamp',
1846                                 'ORDER BY' => 'rev_timestamp DESC' )
1847                         );
1848                 if ( $s === false ) {
1849                         # No one else ever edited this page
1850                         return array( array( 'cantrollback' ) );
1851                 } elseif ( $s->rev_deleted & Revision::DELETED_TEXT || $s->rev_deleted & Revision::DELETED_USER ) {
1852                         # Only admins can see this text
1853                         return array( array( 'notvisiblerev' ) );
1854                 }
1855
1856                 $set = array();
1857                 if ( $bot && $guser->isAllowed( 'markbotedits' ) ) {
1858                         # Mark all reverted edits as bot
1859                         $set['rc_bot'] = 1;
1860                 }
1861
1862                 if ( $wgUseRCPatrol ) {
1863                         # Mark all reverted edits as patrolled
1864                         $set['rc_patrolled'] = 1;
1865                 }
1866
1867                 if ( count( $set ) ) {
1868                         $dbw->update( 'recentchanges', $set,
1869                                 array( /* WHERE */
1870                                         'rc_cur_id' => $current->getPage(),
1871                                         'rc_user_text' => $current->getUserText(),
1872                                         "rc_timestamp > '{$s->rev_timestamp}'",
1873                                 ), __METHOD__
1874                         );
1875                 }
1876
1877                 # Generate the edit summary if necessary
1878                 $target = Revision::newFromId( $s->rev_id );
1879                 if ( empty( $summary ) ) {
1880                         if ( $from == '' ) { // no public user name
1881                                 $summary = wfMsgForContent( 'revertpage-nouser' );
1882                         } else {
1883                                 $summary = wfMsgForContent( 'revertpage' );
1884                         }
1885                 }
1886
1887                 # Allow the custom summary to use the same args as the default message
1888                 $args = array(
1889                         $target->getUserText(), $from, $s->rev_id,
1890                         $wgContLang->timeanddate( wfTimestamp( TS_MW, $s->rev_timestamp ) ),
1891                         $current->getId(), $wgContLang->timeanddate( $current->getTimestamp() )
1892                 );
1893                 $summary = wfMsgReplaceArgs( $summary, $args );
1894
1895                 # Save
1896                 $flags = EDIT_UPDATE;
1897
1898                 if ( $guser->isAllowed( 'minoredit' ) ) {
1899                         $flags |= EDIT_MINOR;
1900                 }
1901
1902                 if ( $bot && ( $guser->isAllowedAny( 'markbotedits', 'bot' ) ) ) {
1903                         $flags |= EDIT_FORCE_BOT;
1904                 }
1905
1906                 # Actually store the edit
1907                 $status = $this->doEdit( $target->getText(), $summary, $flags, $target->getId() );
1908                 if ( !empty( $status->value['revision'] ) ) {
1909                         $revId = $status->value['revision']->getId();
1910                 } else {
1911                         $revId = false;
1912                 }
1913
1914                 wfRunHooks( 'ArticleRollbackComplete', array( $this, $guser, $target, $current ) );
1915
1916                 $resultDetails = array(
1917                         'summary' => $summary,
1918                         'current' => $current,
1919                         'target'  => $target,
1920                         'newid'   => $revId
1921                 );
1922
1923                 return array();
1924         }
1925
1926         /**
1927          * Do standard deferred updates after page view
1928          * @param $user User The relevant user
1929          */
1930         public function doViewUpdates( User $user ) {
1931                 global $wgDeferredUpdateList, $wgDisableCounters;
1932                 if ( wfReadOnly() ) {
1933                         return;
1934                 }
1935
1936                 # Don't update page view counters on views from bot users (bug 14044)
1937                 if ( !$wgDisableCounters && !$user->isAllowed( 'bot' ) && $this->getId() ) {
1938                         $wgDeferredUpdateList[] = new ViewCountUpdate( $this->getId() );
1939                         $wgDeferredUpdateList[] = new SiteStatsUpdate( 1, 0, 0 );
1940                 }
1941
1942                 # Update newtalk / watchlist notification status
1943                 $user->clearNotification( $this->mTitle );
1944         }
1945
1946         /**
1947          * Prepare text which is about to be saved.
1948          * Returns a stdclass with source, pst and output members
1949          */
1950         public function prepareTextForEdit( $text, $revid = null, User $user = null ) {
1951                 global $wgParser, $wgUser;
1952                 $user = is_null( $user ) ? $wgUser : $user;
1953                 // @TODO fixme: check $user->getId() here???
1954                 if ( $this->mPreparedEdit
1955                         && $this->mPreparedEdit->newText == $text
1956                         && $this->mPreparedEdit->revid == $revid
1957                 ) {
1958                         // Already prepared
1959                         return $this->mPreparedEdit;
1960                 }
1961
1962                 $popts = ParserOptions::newFromUser( $user );
1963                 wfRunHooks( 'ArticlePrepareTextForEdit', array( $this, $popts ) );
1964
1965                 $edit = (object)array();
1966                 $edit->revid = $revid;
1967                 $edit->newText = $text;
1968                 $edit->pst = $this->preSaveTransform( $text, $user, $popts );
1969                 $edit->popts = $this->getParserOptions( true );
1970                 $edit->output = $wgParser->parse( $edit->pst, $this->mTitle, $edit->popts, true, true, $revid );
1971                 $edit->oldText = $this->getRawText();
1972
1973                 $this->mPreparedEdit = $edit;
1974
1975                 return $edit;
1976         }
1977
1978         /**
1979          * Do standard deferred updates after page edit.
1980          * Update links tables, site stats, search index and message cache.
1981          * Purges pages that include this page if the text was changed here.
1982          * Every 100th edit, prune the recent changes table.
1983          *
1984          * @private
1985          * @param $revision Revision object
1986          * @param $user User object that did the revision
1987          * @param $options Array of options, following indexes are used:
1988          * - changed: boolean, whether the revision changed the content (default true)
1989          * - created: boolean, whether the revision created the page (default false)
1990          * - oldcountable: boolean or null (default null):
1991          *   - boolean: whether the page was counted as an article before that
1992          *     revision, only used in changed is true and created is false
1993          *   - null: don't change the article count
1994          */
1995         public function doEditUpdates( Revision $revision, User $user, array $options = array() ) {
1996                 global $wgDeferredUpdateList, $wgEnableParserCache;
1997
1998                 wfProfileIn( __METHOD__ );
1999
2000                 $options += array( 'changed' => true, 'created' => false, 'oldcountable' => null );
2001                 $text = $revision->getText();
2002
2003                 # Parse the text
2004                 # Be careful not to double-PST: $text is usually already PST-ed once
2005                 if ( !$this->mPreparedEdit || $this->mPreparedEdit->output->getFlag( 'vary-revision' ) ) {
2006                         wfDebug( __METHOD__ . ": No prepared edit or vary-revision is set...\n" );
2007                         $editInfo = $this->prepareTextForEdit( $text, $revision->getId(), $user );
2008                 } else {
2009                         wfDebug( __METHOD__ . ": No vary-revision, using prepared edit...\n" );
2010                         $editInfo = $this->mPreparedEdit;
2011                 }
2012
2013                 # Save it to the parser cache
2014                 if ( $wgEnableParserCache ) {
2015                         $parserCache = ParserCache::singleton();
2016                         $parserCache->save( $editInfo->output, $this, $editInfo->popts );
2017                 }
2018
2019                 # Update the links tables
2020                 $u = new LinksUpdate( $this->mTitle, $editInfo->output );
2021                 $u->doUpdate();
2022
2023                 wfRunHooks( 'ArticleEditUpdates', array( &$this, &$editInfo, $options['changed'] ) );
2024
2025                 if ( wfRunHooks( 'ArticleEditUpdatesDeleteFromRecentchanges', array( &$this ) ) ) {
2026                         if ( 0 == mt_rand( 0, 99 ) ) {
2027                                 // Flush old entries from the `recentchanges` table; we do this on
2028                                 // random requests so as to avoid an increase in writes for no good reason
2029                                 global $wgRCMaxAge;
2030
2031                                 $dbw = wfGetDB( DB_MASTER );
2032                                 $cutoff = $dbw->timestamp( time() - $wgRCMaxAge );
2033                                 $dbw->delete(
2034                                         'recentchanges',
2035                                         array( "rc_timestamp < '$cutoff'" ),
2036                                         __METHOD__
2037                                 );
2038                         }
2039                 }
2040
2041                 $id = $this->getId();
2042                 $title = $this->mTitle->getPrefixedDBkey();
2043                 $shortTitle = $this->mTitle->getDBkey();
2044
2045                 if ( 0 == $id ) {
2046                         wfProfileOut( __METHOD__ );
2047                         return;
2048                 }
2049
2050                 if ( !$options['changed'] ) {
2051                         $good = 0;
2052                         $total = 0;
2053                 } elseif ( $options['created'] ) {
2054                         $good = (int)$this->isCountable( $editInfo );
2055                         $total = 1;
2056                 } elseif ( $options['oldcountable'] !== null ) {
2057                         $good = (int)$this->isCountable( $editInfo ) - (int)$options['oldcountable'];
2058                         $total = 0;
2059                 } else {
2060                         $good = 0;
2061                         $total = 0;
2062                 }
2063
2064                 $wgDeferredUpdateList[] = new SiteStatsUpdate( 0, 1, $good, $total );
2065                 $wgDeferredUpdateList[] = new SearchUpdate( $id, $title, $text );
2066
2067                 # If this is another user's talk page, update newtalk.
2068                 # Don't do this if $options['changed'] = false (null-edits) nor if
2069                 # it's a minor edit and the user doesn't want notifications for those.
2070                 if ( $options['changed']
2071                         && $this->mTitle->getNamespace() == NS_USER_TALK
2072                         && $shortTitle != $user->getTitleKey()
2073                         && !( $revision->isMinor() && $user->isAllowed( 'nominornewtalk' ) )
2074                 ) {
2075                         if ( wfRunHooks( 'ArticleEditUpdateNewTalk', array( &$this ) ) ) {
2076                                 $other = User::newFromName( $shortTitle, false );
2077                                 if ( !$other ) {
2078                                         wfDebug( __METHOD__ . ": invalid username\n" );
2079                                 } elseif ( User::isIP( $shortTitle ) ) {
2080                                         // An anonymous user
2081                                         $other->setNewtalk( true );
2082                                 } elseif ( $other->isLoggedIn() ) {
2083                                         $other->setNewtalk( true );
2084                                 } else {
2085                                         wfDebug( __METHOD__ . ": don't need to notify a nonexistent user\n" );
2086                                 }
2087                         }
2088                 }
2089
2090                 if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
2091                         MessageCache::singleton()->replace( $shortTitle, $text );
2092                 }
2093
2094                 if( $options['created'] ) {
2095                         self::onArticleCreate( $this->mTitle );
2096                 } else {
2097                         self::onArticleEdit( $this->mTitle );
2098                 }
2099
2100                 wfProfileOut( __METHOD__ );
2101         }
2102
2103         /**
2104          * Perform article updates on a special page creation.
2105          *
2106          * @param $rev Revision object
2107          *
2108          * @todo This is a shitty interface function. Kill it and replace the
2109          * other shitty functions like doEditUpdates and such so it's not needed
2110          * anymore.
2111          * @deprecated since 1.18, use doEditUpdates()
2112          */
2113         public function createUpdates( $rev ) {
2114                 global $wgUser;
2115                 $this->doEditUpdates( $rev, $wgUser, array( 'created' => true ) );
2116         }
2117
2118         /**
2119          * This function is called right before saving the wikitext,
2120          * so we can do things like signatures and links-in-context.
2121          *
2122          * @param $text String article contents
2123          * @param $user User object: user doing the edit
2124          * @param $popts ParserOptions object: parser options, default options for
2125          *               the user loaded if null given
2126          * @return string article contents with altered wikitext markup (signatures
2127          *      converted, {{subst:}}, templates, etc.)
2128          */
2129         public function preSaveTransform( $text, User $user = null, ParserOptions $popts = null ) {
2130                 global $wgParser, $wgUser;
2131                 $user = is_null( $user ) ? $wgUser : $user;
2132
2133                 if ( $popts === null ) {
2134                         $popts = ParserOptions::newFromUser( $user );
2135                 }
2136
2137                 return $wgParser->preSaveTransform( $text, $this->mTitle, $user, $popts );
2138         }
2139
2140         /**
2141          * Loads page_touched and returns a value indicating if it should be used
2142          * @return boolean true if not a redirect
2143          */
2144         public function checkTouched() {
2145                 if ( !$this->mDataLoaded ) {
2146                         $this->loadPageData();
2147                 }
2148                 return !$this->mIsRedirect;
2149         }
2150
2151         /**
2152          * Get the page_touched field
2153          * @return string containing GMT timestamp
2154          */
2155         public function getTouched() {
2156                 if ( !$this->mDataLoaded ) {
2157                         $this->loadPageData();
2158                 }
2159                 return $this->mTouched;
2160         }
2161
2162         /**
2163          * Get the page_latest field
2164          * @return integer rev_id of current revision
2165          */
2166         public function getLatest() {
2167                 if ( !$this->mDataLoaded ) {
2168                         $this->loadPageData();
2169                 }
2170                 return (int)$this->mLatest;
2171         }
2172
2173         /**
2174          * Edit an article without doing all that other stuff
2175          * The article must already exist; link tables etc
2176          * are not updated, caches are not flushed.
2177          *
2178          * @param $text String: text submitted
2179          * @param $user User The relevant user
2180          * @param $comment String: comment submitted
2181          * @param $minor Boolean: whereas it's a minor modification
2182          */
2183         public function doQuickEdit( $text, User $user, $comment = '', $minor = 0 ) {
2184                 wfProfileIn( __METHOD__ );
2185
2186                 $dbw = wfGetDB( DB_MASTER );
2187                 $revision = new Revision( array(
2188                         'page'       => $this->getId(),
2189                         'text'       => $text,
2190                         'comment'    => $comment,
2191                         'minor_edit' => $minor ? 1 : 0,
2192                 ) );
2193                 $revision->insertOn( $dbw );
2194                 $this->updateRevisionOn( $dbw, $revision );
2195
2196                 wfRunHooks( 'NewRevisionFromEditComplete', array( $this, $revision, false, $user ) );
2197
2198                 wfProfileOut( __METHOD__ );
2199         }
2200
2201         /**
2202          * The onArticle*() functions are supposed to be a kind of hooks
2203          * which should be called whenever any of the specified actions
2204          * are done.
2205          *
2206          * This is a good place to put code to clear caches, for instance.
2207          *
2208          * This is called on page move and undelete, as well as edit
2209          *
2210          * @param $title Title object
2211          */
2212         public static function onArticleCreate( $title ) {
2213                 # Update existence markers on article/talk tabs...
2214                 if ( $title->isTalkPage() ) {
2215                         $other = $title->getSubjectPage();
2216                 } else {
2217                         $other = $title->getTalkPage();
2218                 }
2219
2220                 $other->invalidateCache();
2221                 $other->purgeSquid();
2222
2223                 $title->touchLinks();
2224                 $title->purgeSquid();
2225                 $title->deleteTitleProtection();
2226         }
2227
2228         /**
2229          * Clears caches when article is deleted
2230          *
2231          * @param $title Title
2232          */
2233         public static function onArticleDelete( $title ) {
2234                 # Update existence markers on article/talk tabs...
2235                 if ( $title->isTalkPage() ) {
2236                         $other = $title->getSubjectPage();
2237                 } else {
2238                         $other = $title->getTalkPage();
2239                 }
2240
2241                 $other->invalidateCache();
2242                 $other->purgeSquid();
2243
2244                 $title->touchLinks();
2245                 $title->purgeSquid();
2246
2247                 # File cache
2248                 HTMLFileCache::clearFileCache( $title );
2249
2250                 # Messages
2251                 if ( $title->getNamespace() == NS_MEDIAWIKI ) {
2252                         MessageCache::singleton()->replace( $title->getDBkey(), false );
2253                 }
2254
2255                 # Images
2256                 if ( $title->getNamespace() == NS_FILE ) {
2257                         $update = new HTMLCacheUpdate( $title, 'imagelinks' );
2258                         $update->doUpdate();
2259                 }
2260
2261                 # User talk pages
2262                 if ( $title->getNamespace() == NS_USER_TALK ) {
2263                         $user = User::newFromName( $title->getText(), false );
2264                         $user->setNewtalk( false );
2265                 }
2266
2267                 # Image redirects
2268                 RepoGroup::singleton()->getLocalRepo()->invalidateImageRedirect( $title );
2269         }
2270
2271         /**
2272          * Purge caches on page update etc
2273          *
2274          * @param $title Title object
2275          * @todo:  verify that $title is always a Title object (and never false or null), add Title hint to parameter $title
2276          */
2277         public static function onArticleEdit( $title ) {
2278                 global $wgDeferredUpdateList;
2279
2280                 // Invalidate caches of articles which include this page
2281                 $wgDeferredUpdateList[] = new HTMLCacheUpdate( $title, 'templatelinks' );
2282
2283                 // Invalidate the caches of all pages which redirect here
2284                 $wgDeferredUpdateList[] = new HTMLCacheUpdate( $title, 'redirect' );
2285
2286                 # Purge squid for this page only
2287                 $title->purgeSquid();
2288
2289                 # Clear file cache for this page only
2290                 HTMLFileCache::clearFileCache( $title );
2291         }
2292
2293         /**#@-*/
2294
2295         /**
2296          * Return a list of templates used by this article.
2297          * Uses the templatelinks table
2298          *
2299          * @return Array of Title objects
2300          */
2301         public function getUsedTemplates() {
2302                 $result = array();
2303                 $id = $this->mTitle->getArticleID();
2304
2305                 if ( $id == 0 ) {
2306                         return array();
2307                 }
2308
2309                 $dbr = wfGetDB( DB_SLAVE );
2310                 $res = $dbr->select( array( 'templatelinks' ),
2311                         array( 'tl_namespace', 'tl_title' ),
2312                         array( 'tl_from' => $id ),
2313                         __METHOD__ );
2314
2315                 if ( $res !== false ) {
2316                         foreach ( $res as $row ) {
2317                                 $result[] = Title::makeTitle( $row->tl_namespace, $row->tl_title );
2318                         }
2319                 }
2320
2321                 return $result;
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          * Get parser options suitable for rendering the primary article wikitext
2411          * @param $canonical boolean Determines that the generated options must not depend on user preferences (see bug 14404)
2412          * @return mixed ParserOptions object or boolean false
2413          */
2414         public function getParserOptions( $canonical = false ) {
2415                 global $wgUser, $wgLanguageCode;
2416
2417                 if ( !$this->mParserOptions || $canonical ) {
2418                         $user = !$canonical ? $wgUser : new User;
2419                         $parserOptions = new ParserOptions( $user );
2420                         $parserOptions->setTidy( true );
2421                         $parserOptions->enableLimitReport();
2422
2423                         if ( $canonical ) {
2424                                 $parserOptions->setUserLang( $wgLanguageCode ); # Must be set explicitely
2425                                 return $parserOptions;
2426                         }
2427                         $this->mParserOptions = $parserOptions;
2428                 }
2429                 // Clone to allow modifications of the return value without affecting cache
2430                 return clone $this->mParserOptions;
2431         }
2432
2433         /**
2434         * Get parser options suitable for rendering the primary article wikitext
2435         * @param User $user
2436         * @return ParserOptions
2437         */
2438         public function makeParserOptions( User $user ) {
2439                 $options = ParserOptions::newFromUser( $user );
2440                 $options->enableLimitReport(); // show inclusion/loop reports
2441                 $options->setTidy( true ); // fix bad HTML
2442                 return $options;
2443         }
2444
2445         /**
2446          * Update all the appropriate counts in the category table, given that
2447          * we've added the categories $added and deleted the categories $deleted.
2448          *
2449          * @param $added array   The names of categories that were added
2450          * @param $deleted array The names of categories that were deleted
2451          */
2452         public function updateCategoryCounts( $added, $deleted ) {
2453                 $ns = $this->mTitle->getNamespace();
2454                 $dbw = wfGetDB( DB_MASTER );
2455
2456                 # First make sure the rows exist.  If one of the "deleted" ones didn't
2457                 # exist, we might legitimately not create it, but it's simpler to just
2458                 # create it and then give it a negative value, since the value is bogus
2459                 # anyway.
2460                 #
2461                 # Sometimes I wish we had INSERT ... ON DUPLICATE KEY UPDATE.
2462                 $insertCats = array_merge( $added, $deleted );
2463                 if ( !$insertCats ) {
2464                         # Okay, nothing to do
2465                         return;
2466                 }
2467
2468                 $insertRows = array();
2469
2470                 foreach ( $insertCats as $cat ) {
2471                         $insertRows[] = array(
2472                                 'cat_id' => $dbw->nextSequenceValue( 'category_cat_id_seq' ),
2473                                 'cat_title' => $cat
2474                         );
2475                 }
2476                 $dbw->insert( 'category', $insertRows, __METHOD__, 'IGNORE' );
2477
2478                 $addFields    = array( 'cat_pages = cat_pages + 1' );
2479                 $removeFields = array( 'cat_pages = cat_pages - 1' );
2480
2481                 if ( $ns == NS_CATEGORY ) {
2482                         $addFields[]    = 'cat_subcats = cat_subcats + 1';
2483                         $removeFields[] = 'cat_subcats = cat_subcats - 1';
2484                 } elseif ( $ns == NS_FILE ) {
2485                         $addFields[]    = 'cat_files = cat_files + 1';
2486                         $removeFields[] = 'cat_files = cat_files - 1';
2487                 }
2488
2489                 if ( $added ) {
2490                         $dbw->update(
2491                                 'category',
2492                                 $addFields,
2493                                 array( 'cat_title' => $added ),
2494                                 __METHOD__
2495                         );
2496                 }
2497
2498                 if ( $deleted ) {
2499                         $dbw->update(
2500                                 'category',
2501                                 $removeFields,
2502                                 array( 'cat_title' => $deleted ),
2503                                 __METHOD__
2504                         );
2505                 }
2506         }
2507
2508         /**
2509          * Updates cascading protections
2510          *
2511          * @param $parserOutput ParserOutput object for the current version
2512          **/
2513         public function doCascadeProtectionUpdates( ParserOutput $parserOutput ) {
2514                 if ( wfReadOnly() || !$this->mTitle->areRestrictionsCascading() ) {
2515                         return;
2516                 }
2517
2518                 // templatelinks table may have become out of sync,
2519                 // especially if using variable-based transclusions.
2520                 // For paranoia, check if things have changed and if
2521                 // so apply updates to the database. This will ensure
2522                 // that cascaded protections apply as soon as the changes
2523                 // are visible.
2524
2525                 # Get templates from templatelinks
2526                 $id = $this->mTitle->getArticleID();
2527
2528                 $tlTemplates = array();
2529
2530                 $dbr = wfGetDB( DB_SLAVE );
2531                 $res = $dbr->select( array( 'templatelinks' ),
2532                         array( 'tl_namespace', 'tl_title' ),
2533                         array( 'tl_from' => $id ),
2534                         __METHOD__
2535                 );
2536
2537                 foreach ( $res as $row ) {
2538                         $tlTemplates["{$row->tl_namespace}:{$row->tl_title}"] = true;
2539                 }
2540
2541                 # Get templates from parser output.
2542                 $poTemplates = array();
2543                 foreach ( $parserOutput->getTemplates() as $ns => $templates ) {
2544                         foreach ( $templates as $dbk => $id ) {
2545                                 $poTemplates["$ns:$dbk"] = true;
2546                         }
2547                 }
2548
2549                 # Get the diff
2550                 $templates_diff = array_diff_key( $poTemplates, $tlTemplates );
2551
2552                 if ( count( $templates_diff ) > 0 ) {
2553                         # Whee, link updates time.
2554                         $u = new LinksUpdate( $this->mTitle, $parserOutput, false );
2555                         $u->doUpdate();
2556                 }
2557         }
2558
2559         /*
2560         * @deprecated since 1.18
2561         */
2562         public function quickEdit( $text, $comment = '', $minor = 0 ) {
2563                 global $wgUser;
2564                 return $this->doQuickEdit( $text, $wgUser, $comment, $minor );
2565         }
2566
2567         /*
2568         * @deprecated since 1.18
2569         */
2570         public function viewUpdates() {
2571                 global $wgUser;
2572                 return $this->doViewUpdates( $wgUser );
2573         }
2574
2575         /*
2576         * @deprecated since 1.18
2577         */
2578         public function useParserCache( $oldid ) {
2579                 global $wgUser;
2580                 return $this->isParserCacheUsed( $wgUser, $oldid );
2581         }
2582 }