includes/WikiPage.php

   1 <?php
   2 /**
   3  * Abstract class for type hinting (accepts WikiPage, Article, ImagePage, CategoryPage)
   4  */
   5 abstract class Page {}
   6
   7 /**
   8  * Class representing a MediaWiki article and history.
   9  *
  10  * Some fields are public only for backwards-compatibility. Use accessors.
  11  * In the past, this class was part of Article.php and everything was public.
  12  *
  13  * @internal documentation reviewed 15 Mar 2010
  14  */
  15 class WikiPage extends Page {
  16         /**
  17          * @var Title
  18          */
  19         public $mTitle = null;
  20
  21         /**@{{
  22          * @protected
  23          */
  24         public $mDataLoaded = false;         // !< Boolean
  25         public $mIsRedirect = false;         // !< Boolean
  26         public $mLatest = false;             // !< Integer (false means "not loaded")
  27         public $mPreparedEdit = false;       // !< Array
  28         /**@}}*/
  29
  30         /**
  31          * @var Title
  32          */
  33         protected $mRedirectTarget = null;
  34
  35         /**
  36          * @var Revision
  37          */
  38         protected $mLastRevision = null;
  39
  40         /**
  41          * @var string; timestamp of the current revision or empty string if not loaded
  42          */
  43         protected $mTimestamp = '';
  44
  45         /**
  46          * @var string
  47          */
  48         protected $mTouched = '19700101000000';
  49
  50         /**
  51          * @var int|null
  52          */
  53         protected $mCounter = null;
  54
  55         /**
  56          * Constructor and clear the article
  57          * @param $title Title Reference to a Title object.
  58          */
  59         public function __construct( Title $title ) {
  60                 $this->mTitle = $title;
  61         }
  62
  63         /**
  64          * Create a WikiPage object of the appropriate class for the given title.
  65          *
  66          * @param $title Title
  67          * @return WikiPage object of the appropriate type
  68          */
  69         public static function factory( Title $title ) {
  70                 $ns = $title->getNamespace();
  71
  72                 if ( $ns == NS_MEDIA ) {
  73                         throw new MWException( "NS_MEDIA is a virtual namespace; use NS_FILE." );
  74                 } elseif ( $ns < 0 ) {
  75                         throw new MWException( "Invalid or virtual namespace $ns given." );
  76                 }
  77
  78                 switch ( $ns ) {
  79                         case NS_FILE:
  80                                 $page = new WikiFilePage( $title );
  81                                 break;
  82                         case NS_CATEGORY:
  83                                 $page = new WikiCategoryPage( $title );
  84                                 break;
  85                         default:
  86                                 $page = new WikiPage( $title );
  87                 }
  88
  89                 return $page;
  90         }
  91
  92         /**
  93          * Constructor from a page id
  94          *
  95          * @param $id Int article ID to load
  96          *
  97          * @return WikiPage
  98          */
  99         public static function newFromID( $id ) {
 100                 $t = Title::newFromID( $id );
 101                 if ( $t ) {
 102                         return self::factory( $t );
 103                 }
 104                 return null;
 105         }
 106
 107         /**
 108          * Returns overrides for action handlers.
 109          * Classes listed here will be used instead of the default one when
 110          * (and only when) $wgActions[$action] === true. This allows subclasses
 111          * to override the default behavior.
 112          *
 113          * @todo: move this UI stuff somewhere else
 114          *
 115          * @return Array
 116          */
 117         public function getActionOverrides() {
 118                 return array();
 119         }
 120
 121         /**
 122          * Get the title object of the article
 123          * @return Title object of this page
 124          */
 125         public function getTitle() {
 126                 return $this->mTitle;
 127         }
 128
 129         /**
 130          * Clear the object
 131          */
 132         public function clear() {
 133                 $this->mDataLoaded = false;
 134
 135                 $this->mCounter = null;
 136                 $this->mRedirectTarget = null; # Title object if set
 137                 $this->mLastRevision = null; # Latest revision
 138                 $this->mTouched = '19700101000000';
 139                 $this->mTimestamp = '';
 140                 $this->mIsRedirect = false;
 141                 $this->mLatest = false;
 142                 $this->mPreparedEdit = false;
 143         }
 144
 145         /**
 146          * Return the list of revision fields that should be selected to create
 147          * a new page.
 148          *
 149          * @return array
 150          */
 151         public static function selectFields() {
 152                 return array(
 153                         'page_id',
 154                         'page_namespace',
 155                         'page_title',
 156                         'page_restrictions',
 157                         'page_counter',
 158                         'page_is_redirect',
 159                         'page_is_new',
 160                         'page_random',
 161                         'page_touched',
 162                         'page_latest',
 163                         'page_len',
 164             'page_content_model',
 165                 );
 166         }
 167
 168         /**
 169          * Fetch a page record with the given conditions
 170          * @param $dbr DatabaseBase object
 171          * @param $conditions Array
 172          * @return mixed Database result resource, or false on failure
 173          */
 174         protected function pageData( $dbr, $conditions ) {
 175                 $fields = self::selectFields();
 176
 177                 wfRunHooks( 'ArticlePageDataBefore', array( &$this, &$fields ) );
 178
 179                 $row = $dbr->selectRow( 'page', $fields, $conditions, __METHOD__ );
 180
 181                 wfRunHooks( 'ArticlePageDataAfter', array( &$this, &$row ) );
 182
 183                 return $row;
 184         }
 185
 186         /**
 187          * Fetch a page record matching the Title object's namespace and title
 188          * using a sanitized title string
 189          *
 190          * @param $dbr DatabaseBase object
 191          * @param $title Title object
 192          * @return mixed Database result resource, or false on failure
 193          */
 194         public function pageDataFromTitle( $dbr, $title ) {
 195                 return $this->pageData( $dbr, array(
 196                         'page_namespace' => $title->getNamespace(),
 197                         'page_title'     => $title->getDBkey() ) );
 198         }
 199
 200         /**
 201          * Fetch a page record matching the requested ID
 202          *
 203          * @param $dbr DatabaseBase
 204          * @param $id Integer
 205          * @return mixed Database result resource, or false on failure
 206          */
 207         public function pageDataFromId( $dbr, $id ) {
 208                 return $this->pageData( $dbr, array( 'page_id' => $id ) );
 209         }
 210
 211         /**
 212          * Set the general counter, title etc data loaded from
 213          * some source.
 214          *
 215          * @param $data Object|String One of the following:
 216          *              A DB query result object or...
 217          *              "fromdb" to get from a slave DB or...
 218          *              "fromdbmaster" to get from the master DB
 219          * @return void
 220          */
 221         public function loadPageData( $data = 'fromdb' ) {
 222                 if ( $data === 'fromdbmaster' ) {
 223                         $data = $this->pageDataFromTitle( wfGetDB( DB_MASTER ), $this->mTitle );
 224                 } elseif ( $data === 'fromdb' ) { // slave
 225                         $data = $this->pageDataFromTitle( wfGetDB( DB_SLAVE ), $this->mTitle );
 226                         # Use a "last rev inserted" timestamp key to dimish the issue of slave lag.
 227                         # Note that DB also stores the master position in the session and checks it.
 228                         $touched = $this->getCachedLastEditTime();
 229                         if ( $touched ) { // key set
 230                                 if ( !$data || $touched > wfTimestamp( TS_MW, $data->page_touched ) ) {
 231                                         $data = $this->pageDataFromTitle( wfGetDB( DB_MASTER ), $this->mTitle );
 232                                 }
 233                         }
 234                 }
 235
 236                 $lc = LinkCache::singleton();
 237
 238                 if ( $data ) {
 239                         $lc->addGoodLinkObjFromRow( $this->mTitle, $data );
 240
 241                         $this->mTitle->loadFromRow( $data );
 242
 243                         # Old-fashioned restrictions
 244                         $this->mTitle->loadRestrictions( $data->page_restrictions );
 245
 246                         $this->mCounter     = intval( $data->page_counter );
 247                         $this->mTouched     = wfTimestamp( TS_MW, $data->page_touched );
 248                         $this->mIsRedirect  = intval( $data->page_is_redirect );
 249                         $this->mLatest      = intval( $data->page_latest );
 250                 } else {
 251                         $lc->addBadLinkObj( $this->mTitle );
 252
 253                         $this->mTitle->loadFromRow( false );
 254                 }
 255
 256                 $this->mDataLoaded = true;
 257         }
 258
 259         /**
 260          * @return int Page ID
 261          */
 262         public function getId() {
 263                 return $this->mTitle->getArticleID();
 264         }
 265
 266         /**
 267          * @return bool Whether or not the page exists in the database
 268          */
 269         public function exists() {
 270                 return $this->mTitle->exists();
 271         }
 272
 273         /**
 274          * Check if this page is something we're going to be showing
 275          * some sort of sensible content for. If we return false, page
 276          * views (plain action=view) will return an HTTP 404 response,
 277          * so spiders and robots can know they're following a bad link.
 278          *
 279          * @return bool
 280          */
 281         public function hasViewableContent() {
 282                 return $this->mTitle->exists() || $this->mTitle->isAlwaysKnown();
 283         }
 284
 285         /**
 286          * @return int The view count for the page
 287          */
 288         public function getCount() {
 289                 if ( !$this->mDataLoaded ) {
 290                         $this->loadPageData();
 291                 }
 292
 293                 return $this->mCounter;
 294         }
 295
 296         /**
 297          * Tests if the article text represents a redirect
 298          *
 299          * @param $text mixed string containing article contents, or boolean
 300          * @return bool
 301          */
 302         public function isRedirect( $text = false ) {
 303                 if ( $text === false ) {
 304                         if ( !$this->mDataLoaded ) {
 305                                 $this->loadPageData();
 306                         }
 307
 308                         return (bool)$this->mIsRedirect;
 309                 } else {
 310                         return Title::newFromRedirect( $text ) !== null;
 311                 }
 312         }
 313
 314         /**
 315          * Loads page_touched and returns a value indicating if it should be used
 316          * @return boolean true if not a redirect
 317          */
 318         public function checkTouched() {
 319                 if ( !$this->mDataLoaded ) {
 320                         $this->loadPageData();
 321                 }
 322                 return !$this->mIsRedirect;
 323         }
 324
 325         /**
 326          * Get the page_touched field
 327          * @return string containing GMT timestamp
 328          */
 329         public function getTouched() {
 330                 if ( !$this->mDataLoaded ) {
 331                         $this->loadPageData();
 332                 }
 333                 return $this->mTouched;
 334         }
 335
 336         /**
 337          * Get the page_latest field
 338          * @return integer rev_id of current revision
 339          */
 340         public function getLatest() {
 341                 if ( !$this->mDataLoaded ) {
 342                         $this->loadPageData();
 343                 }
 344                 return (int)$this->mLatest;
 345         }
 346
 347         /**
 348          * Loads everything except the text
 349          * This isn't necessary for all uses, so it's only done if needed.
 350          */
 351         protected function loadLastEdit() {
 352                 if ( $this->mLastRevision !== null ) {
 353                         return; // already loaded
 354                 }
 355
 356                 $latest = $this->getLatest();
 357                 if ( !$latest ) {
 358                         return; // page doesn't exist or is missing page_latest info
 359                 }
 360
 361                 $revision = Revision::newFromPageId( $this->getId(), $latest );
 362                 if ( $revision ) { // sanity
 363                         $this->setLastEdit( $revision );
 364                 }
 365         }
 366
 367         /**
 368          * Set the latest revision
 369          */
 370         protected function setLastEdit( Revision $revision ) {
 371                 $this->mLastRevision = $revision;
 372                 $this->mTimestamp = $revision->getTimestamp();
 373         }
 374
 375         /**
 376          * Get the latest revision
 377          * @return Revision|null
 378          */
 379         public function getRevision() {
 380                 $this->loadLastEdit();
 381                 if ( $this->mLastRevision ) {
 382                         return $this->mLastRevision;
 383                 }
 384                 return null;
 385         }
 386
 387     /**
 388      * Get the content of the current revision. No side-effects...
 389      *
 390      * @param $audience Integer: one of:
 391      *      Revision::FOR_PUBLIC       to be displayed to all users
 392      *      Revision::FOR_THIS_USER    to be displayed to $wgUser
 393      *      Revision::RAW              get the text regardless of permissions
 394      * @return String|null The content of the current revision
 395      */
 396     public function getContent( $audience = Revision::FOR_PUBLIC ) {
 397         $this->loadLastEdit();
 398         if ( $this->mLastRevision ) {
 399             return $this->mLastRevision->getContent( $audience );
 400         }
 401         return false;
 402     }
 403
 404         /**
 405          * Get the text of the current revision. No side-effects...
 406          *
 407          * @param $audience Integer: one of:
 408          *      Revision::FOR_PUBLIC       to be displayed to all users
 409          *      Revision::FOR_THIS_USER    to be displayed to $wgUser
 410          *      Revision::RAW              get the text regardless of permissions
 411          * @return String|false The text of the current revision
 412      * @deprecated as of 1.20, getContent() should be used instead.
 413          */
 414         public function getText( $audience = Revision::FOR_PUBLIC ) { #FIXME: deprecated, replace usage!
 415         wfDeprecated( __METHOD__, '1.20' );
 416                 $this->loadLastEdit();
 417                 if ( $this->mLastRevision ) {
 418                         return $this->mLastRevision->getText( $audience );
 419                 }
 420                 return false;
 421         }
 422
 423         /**
 424          * Get the text of the current revision. No side-effects...
 425          *
 426          * @return String|false The text of the current revision
 427          */
 428         public function getRawText() { #FIXME: deprecated, replace usage!
 429                 return $this->getText( Revision::RAW );
 430         }
 431
 432         /**
 433          * @return string MW timestamp of last article revision
 434          */
 435         public function getTimestamp() {
 436                 // Check if the field has been filled by WikiPage::setTimestamp()
 437                 if ( !$this->mTimestamp ) {
 438                         $this->loadLastEdit();
 439                 }
 440                 return wfTimestamp( TS_MW, $this->mTimestamp );
 441         }
 442
 443         /**
 444          * Set the page timestamp (use only to avoid DB queries)
 445          * @param $ts string MW timestamp of last article revision
 446          * @return void
 447          */
 448         public function setTimestamp( $ts ) {
 449                 $this->mTimestamp = wfTimestamp( TS_MW, $ts );
 450         }
 451
 452         /**
 453          * @param $audience Integer: one of:
 454          *      Revision::FOR_PUBLIC       to be displayed to all users
 455          *      Revision::FOR_THIS_USER    to be displayed to $wgUser
 456          *      Revision::RAW              get the text regardless of permissions
 457          * @return int user ID for the user that made the last article revision
 458          */
 459         public function getUser( $audience = Revision::FOR_PUBLIC ) {
 460                 $this->loadLastEdit();
 461                 if ( $this->mLastRevision ) {
 462                         return $this->mLastRevision->getUser( $audience );
 463                 } else {
 464                         return -1;
 465                 }
 466         }
 467
 468         /**
 469          * @param $audience Integer: one of:
 470          *      Revision::FOR_PUBLIC       to be displayed to all users
 471          *      Revision::FOR_THIS_USER    to be displayed to $wgUser
 472          *      Revision::RAW              get the text regardless of permissions
 473          * @return string username of the user that made the last article revision
 474          */
 475         public function getUserText( $audience = Revision::FOR_PUBLIC ) {
 476                 $this->loadLastEdit();
 477                 if ( $this->mLastRevision ) {
 478                         return $this->mLastRevision->getUserText( $audience );
 479                 } else {
 480                         return '';
 481                 }
 482         }
 483
 484         /**
 485          * @param $audience Integer: one of:
 486          *      Revision::FOR_PUBLIC       to be displayed to all users
 487          *      Revision::FOR_THIS_USER    to be displayed to $wgUser
 488          *      Revision::RAW              get the text regardless of permissions
 489          * @return string Comment stored for the last article revision
 490          */
 491         public function getComment( $audience = Revision::FOR_PUBLIC ) {
 492                 $this->loadLastEdit();
 493                 if ( $this->mLastRevision ) {
 494                         return $this->mLastRevision->getComment( $audience );
 495                 } else {
 496                         return '';
 497                 }
 498         }
 499
 500         /**
 501          * Returns true if last revision was marked as "minor edit"
 502          *
 503          * @return boolean Minor edit indicator for the last article revision.
 504          */
 505         public function getMinorEdit() {
 506                 $this->loadLastEdit();
 507                 if ( $this->mLastRevision ) {
 508                         return $this->mLastRevision->isMinor();
 509                 } else {
 510                         return false;
 511                 }
 512         }
 513
 514         /**
 515          * Get the cached timestamp for the last time the page changed.
 516          * This is only used to help handle slave lag by comparing to page_touched.
 517          * @return string MW timestamp
 518          */
 519         protected function getCachedLastEditTime() {
 520                 global $wgMemc;
 521                 $key = wfMemcKey( 'page-lastedit', md5( $this->mTitle->getPrefixedDBkey() ) );
 522                 return $wgMemc->get( $key );
 523         }
 524
 525         /**
 526          * Set the cached timestamp for the last time the page changed.
 527          * This is only used to help handle slave lag by comparing to page_touched.
 528          * @param $timestamp string
 529          * @return void
 530          */
 531         public function setCachedLastEditTime( $timestamp ) {
 532                 global $wgMemc;
 533                 $key = wfMemcKey( 'page-lastedit', md5( $this->mTitle->getPrefixedDBkey() ) );
 534                 $wgMemc->set( $key, wfTimestamp( TS_MW, $timestamp ), 60*15 );
 535         }
 536
 537         /**
 538          * Determine whether a page would be suitable for being counted as an
 539          * article in the site_stats table based on the title & its content
 540          *
 541          * @param $editInfo Object or false: object returned by prepareTextForEdit(),
 542          *        if false, the current database state will be used
 543          * @return Boolean
 544          */
 545         public function isCountable( $editInfo = false ) {
 546                 global $wgArticleCountMethod;
 547
 548                 if ( !$this->mTitle->isContentPage() ) {
 549                         return false;
 550                 }
 551
 552                 $text = $editInfo ? $editInfo->pst : false;
 553
 554                 if ( $this->isRedirect( $text ) ) {
 555                         return false;
 556                 }
 557
 558                 switch ( $wgArticleCountMethod ) {
 559                 case 'any':
 560                         return true;
 561                 case 'comma':
 562                         if ( $text === false ) {
 563                                 $text = $this->getRawText();
 564                         }
 565                         return strpos( $text,  ',' ) !== false;
 566                 case 'link':
 567                         if ( $editInfo ) {
 568                                 // ParserOutput::getLinks() is a 2D array of page links, so
 569                                 // to be really correct we would need to recurse in the array
 570                                 // but the main array should only have items in it if there are
 571                                 // links.
 572                                 return (bool)count( $editInfo->output->getLinks() );
 573                         } else {
 574                                 return (bool)wfGetDB( DB_SLAVE )->selectField( 'pagelinks', 1,
 575                                         array( 'pl_from' => $this->getId() ), __METHOD__ );
 576                         }
 577                 }
 578         }
 579
 580         /**
 581          * If this page is a redirect, get its target
 582          *
 583          * The target will be fetched from the redirect table if possible.
 584          * If this page doesn't have an entry there, call insertRedirect()
 585          * @return Title|mixed object, or null if this page is not a redirect
 586          */
 587         public function getRedirectTarget() {
 588                 if ( !$this->mTitle->isRedirect() ) {
 589                         return null;
 590                 }
 591
 592                 if ( $this->mRedirectTarget !== null ) {
 593                         return $this->mRedirectTarget;
 594                 }
 595
 596                 # Query the redirect table
 597                 $dbr = wfGetDB( DB_SLAVE );
 598                 $row = $dbr->selectRow( 'redirect',
 599                         array( 'rd_namespace', 'rd_title', 'rd_fragment', 'rd_interwiki' ),
 600                         array( 'rd_from' => $this->getId() ),
 601                         __METHOD__
 602                 );
 603
 604                 // rd_fragment and rd_interwiki were added later, populate them if empty
 605                 if ( $row && !is_null( $row->rd_fragment ) && !is_null( $row->rd_interwiki ) ) {
 606                         return $this->mRedirectTarget = Title::makeTitle(
 607                                 $row->rd_namespace, $row->rd_title,
 608                                 $row->rd_fragment, $row->rd_interwiki );
 609                 }
 610
 611                 # This page doesn't have an entry in the redirect table
 612                 return $this->mRedirectTarget = $this->insertRedirect();
 613         }
 614
 615         /**
 616          * Insert an entry for this page into the redirect table.
 617          *
 618          * Don't call this function directly unless you know what you're doing.
 619          * @return Title object or null if not a redirect
 620          */
 621         public function insertRedirect() {
 622                 // recurse through to only get the final target
 623                 $retval = Title::newFromRedirectRecurse( $this->getRawText() );
 624                 if ( !$retval ) {
 625                         return null;
 626                 }
 627                 $this->insertRedirectEntry( $retval );
 628                 return $retval;
 629         }
 630
 631         /**
 632          * Insert or update the redirect table entry for this page to indicate
 633          * it redirects to $rt .
 634          * @param $rt Title redirect target
 635          */
 636         public function insertRedirectEntry( $rt ) {
 637                 $dbw = wfGetDB( DB_MASTER );
 638                 $dbw->replace( 'redirect', array( 'rd_from' ),
 639                         array(
 640                                 'rd_from'      => $this->getId(),
 641                                 'rd_namespace' => $rt->getNamespace(),
 642                                 'rd_title'     => $rt->getDBkey(),
 643                                 'rd_fragment'  => $rt->getFragment(),
 644                                 'rd_interwiki' => $rt->getInterwiki(),
 645                         ),
 646                         __METHOD__
 647                 );
 648         }
 649
 650         /**
 651          * Get the Title object or URL this page redirects to
 652          *
 653          * @return mixed false, Title of in-wiki target, or string with URL
 654          */
 655         public function followRedirect() {
 656                 return $this->getRedirectURL( $this->getRedirectTarget() );
 657         }
 658
 659         /**
 660          * Get the Title object or URL to use for a redirect. We use Title
 661          * objects for same-wiki, non-special redirects and URLs for everything
 662          * else.
 663          * @param $rt Title Redirect target
 664          * @return mixed false, Title object of local target, or string with URL
 665          */
 666         public function getRedirectURL( $rt ) {
 667                 if ( !$rt ) {
 668                         return false;
 669                 }
 670
 671                 if ( $rt->isExternal() ) {
 672                         if ( $rt->isLocal() ) {
 673                                 // Offsite wikis need an HTTP redirect.
 674                                 //
 675                                 // This can be hard to reverse and may produce loops,
 676                                 // so they may be disabled in the site configuration.
 677                                 $source = $this->mTitle->getFullURL( 'redirect=no' );
 678                                 return $rt->getFullURL( 'rdfrom=' . urlencode( $source ) );
 679                         } else {
 680                                 // External pages pages without "local" bit set are not valid
 681                                 // redirect targets
 682                                 return false;
 683                         }
 684                 }
 685
 686                 if ( $rt->isSpecialPage() ) {
 687                         // Gotta handle redirects to special pages differently:
 688                         // Fill the HTTP response "Location" header and ignore
 689                         // the rest of the page we're on.
 690                         //
 691                         // Some pages are not valid targets
 692                         if ( $rt->isValidRedirectTarget() ) {
 693                                 return $rt->getFullURL();
 694                         } else {
 695                                 return false;
 696                         }
 697                 }
 698
 699                 return $rt;
 700         }
 701
 702         /**
 703          * Get a list of users who have edited this article, not including the user who made
 704          * the most recent revision, which you can get from $article->getUser() if you want it
 705          * @return UserArrayFromResult
 706          */
 707         public function getContributors() {
 708                 # @todo FIXME: This is expensive; cache this info somewhere.
 709
 710                 $dbr = wfGetDB( DB_SLAVE );
 711
 712                 if ( $dbr->implicitGroupby() ) {
 713                         $realNameField = 'user_real_name';
 714                 } else {
 715                         $realNameField = 'MIN(user_real_name) AS user_real_name';
 716                 }
 717
 718                 $tables = array( 'revision', 'user' );
 719
 720                 $fields = array(
 721                         'rev_user as user_id',
 722                         'rev_user_text AS user_name',
 723                         $realNameField,
 724                         'MAX(rev_timestamp) AS timestamp',
 725                 );
 726
 727                 $conds = array( 'rev_page' => $this->getId() );
 728
 729                 // The user who made the top revision gets credited as "this page was last edited by
 730                 // John, based on contributions by Tom, Dick and Harry", so don't include them twice.
 731                 $user = $this->getUser();
 732                 if ( $user ) {
 733                         $conds[] = "rev_user != $user";
 734                 } else {
 735                         $conds[] = "rev_user_text != {$dbr->addQuotes( $this->getUserText() )}";
 736                 }
 737
 738                 $conds[] = "{$dbr->bitAnd( 'rev_deleted', Revision::DELETED_USER )} = 0"; // username hidden?
 739
 740                 $jconds = array(
 741                         'user' => array( 'LEFT JOIN', 'rev_user = user_id' ),
 742                 );
 743
 744                 $options = array(
 745                         'GROUP BY' => array( 'rev_user', 'rev_user_text' ),
 746                         'ORDER BY' => 'timestamp DESC',
 747                 );
 748
 749                 $res = $dbr->select( $tables, $fields, $conds, __METHOD__, $options, $jconds );
 750                 return new UserArrayFromResult( $res );
 751         }
 752
 753         /**
 754          * Get the last N authors
 755          * @param $num Integer: number of revisions to get
 756          * @param $revLatest String: the latest rev_id, selected from the master (optional)
 757          * @return array Array of authors, duplicates not removed
 758          */
 759         public function getLastNAuthors( $num, $revLatest = 0 ) {
 760                 wfProfileIn( __METHOD__ );
 761                 // First try the slave
 762                 // If that doesn't have the latest revision, try the master
 763                 $continue = 2;
 764                 $db = wfGetDB( DB_SLAVE );
 765
 766                 do {
 767                         $res = $db->select( array( 'page', 'revision' ),
 768                                 array( 'rev_id', 'rev_user_text' ),
 769                                 array(
 770                                         'page_namespace' => $this->mTitle->getNamespace(),
 771                                         'page_title' => $this->mTitle->getDBkey(),
 772                                         'rev_page = page_id'
 773                                 ), __METHOD__,
 774                                 array(
 775                                         'ORDER BY' => 'rev_timestamp DESC',
 776                                         'LIMIT' => $num
 777                                 )
 778                         );
 779
 780                         if ( !$res ) {
 781                                 wfProfileOut( __METHOD__ );
 782                                 return array();
 783                         }
 784
 785                         $row = $db->fetchObject( $res );
 786
 787                         if ( $continue == 2 && $revLatest && $row->rev_id != $revLatest ) {
 788                                 $db = wfGetDB( DB_MASTER );
 789                                 $continue--;
 790                         } else {
 791                                 $continue = 0;
 792                         }
 793                 } while ( $continue );
 794
 795                 $authors = array( $row->rev_user_text );
 796
 797                 foreach ( $res as $row ) {
 798                         $authors[] = $row->rev_user_text;
 799                 }
 800
 801                 wfProfileOut( __METHOD__ );
 802                 return $authors;
 803         }
 804
 805         /**
 806          * Should the parser cache be used?
 807          *
 808          * @param $parserOptions ParserOptions to check
 809          * @param $oldid int
 810          * @return boolean
 811          */
 812         public function isParserCacheUsed( ParserOptions $parserOptions, $oldid ) {
 813                 global $wgEnableParserCache;
 814
 815                 return $wgEnableParserCache
 816                         && $parserOptions->getStubThreshold() == 0
 817                         && $this->mTitle->exists()
 818                         && ( $oldid === null || $oldid === 0 || $oldid === $this->getLatest() )
 819                         && $this->mTitle->isWikitextPage(); #FIXME: ask ContentHandler if cachable!
 820         }
 821
 822         /**
 823          * Get a ParserOutput for the given ParserOptions and revision ID.
 824          * The parser cache will be used if possible.
 825          *
 826          * @since 1.19
 827          * @param $parserOptions ParserOptions to use for the parse operation
 828          * @param $oldid Revision ID to get the text from, passing null or 0 will
 829          *               get the current revision (default value)
 830          * @return ParserOutput or false if the revision was not found
 831          */
 832         public function getParserOutput( ParserOptions $parserOptions, $oldid = null ) {
 833                 wfProfileIn( __METHOD__ );
 834
 835                 $useParserCache = $this->isParserCacheUsed( $parserOptions, $oldid );
 836                 wfDebug( __METHOD__ . ': using parser cache: ' . ( $useParserCache ? 'yes' : 'no' ) . "\n" );
 837                 if ( $parserOptions->getStubThreshold() ) {
 838                         wfIncrStats( 'pcache_miss_stub' );
 839                 }
 840
 841                 if ( $useParserCache ) {
 842                         $parserOutput = ParserCache::singleton()->get( $this, $parserOptions );
 843                         if ( $parserOutput !== false ) {
 844                                 wfProfileOut( __METHOD__ );
 845                                 return $parserOutput;
 846                         }
 847                 }
 848
 849                 if ( $oldid === null || $oldid === 0 ) {
 850                         $oldid = $this->getLatest();
 851                 }
 852
 853                 $pool = new PoolWorkArticleView( $this, $parserOptions, $oldid, $useParserCache );
 854                 $pool->execute();
 855
 856                 wfProfileOut( __METHOD__ );
 857
 858                 return $pool->getParserOutput();
 859         }
 860
 861         /**
 862          * Do standard deferred updates after page view
 863          * @param $user User The relevant user
 864          */
 865         public function doViewUpdates( User $user ) {
 866                 global $wgDisableCounters;
 867                 if ( wfReadOnly() ) {
 868                         return;
 869                 }
 870
 871                 # Don't update page view counters on views from bot users (bug 14044)
 872                 if ( !$wgDisableCounters && !$user->isAllowed( 'bot' ) && $this->mTitle->exists() ) {
 873                         DeferredUpdates::addUpdate( new ViewCountUpdate( $this->getId() ) );
 874                         DeferredUpdates::addUpdate( new SiteStatsUpdate( 1, 0, 0 ) );
 875                 }
 876
 877                 # Update newtalk / watchlist notification status
 878                 $user->clearNotification( $this->mTitle );
 879         }
 880
 881         /**
 882          * Perform the actions of a page purging
 883          */
 884         public function doPurge() {
 885                 global $wgUseSquid;
 886
 887                 if( !wfRunHooks( 'ArticlePurge', array( &$this ) ) ){
 888                         return false;
 889                 }
 890
 891                 // Invalidate the cache
 892                 $this->mTitle->invalidateCache();
 893                 $this->clear();
 894
 895                 if ( $wgUseSquid ) {
 896                         // Commit the transaction before the purge is sent
 897                         $dbw = wfGetDB( DB_MASTER );
 898                         $dbw->commit();
 899
 900                         // Send purge
 901                         $update = SquidUpdate::newSimplePurge( $this->mTitle );
 902                         $update->doUpdate();
 903                 }
 904
 905                 if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
 906                         if ( $this->mTitle->exists() ) {
 907                                 $text = $this->getRawText();
 908                         } else {
 909                                 $text = false;
 910                         }
 911
 912                         MessageCache::singleton()->replace( $this->mTitle->getDBkey(), $text );
 913                 }
 914                 return true;
 915         }
 916
 917         /**
 918          * Insert a new empty page record for this article.
 919          * This *must* be followed up by creating a revision
 920          * and running $this->updateRevisionOn( ... );
 921          * or else the record will be left in a funky state.
 922          * Best if all done inside a transaction.
 923          *
 924          * @param $dbw DatabaseBase
 925          * @return int The newly created page_id key, or false if the title already existed
 926          */
 927         public function insertOn( $dbw ) {
 928                 wfProfileIn( __METHOD__ );
 929
 930                 $page_id = $dbw->nextSequenceValue( 'page_page_id_seq' );
 931                 $dbw->insert( 'page', array(
 932                         'page_id'           => $page_id,
 933                         'page_namespace'    => $this->mTitle->getNamespace(),
 934                         'page_title'        => $this->mTitle->getDBkey(),
 935                         'page_counter'      => 0,
 936                         'page_restrictions' => '',
 937                         'page_is_redirect'  => 0, # Will set this shortly...
 938                         'page_is_new'       => 1,
 939                         'page_random'       => wfRandom(),
 940                         'page_touched'      => $dbw->timestamp(),
 941                         'page_latest'       => 0, # Fill this in shortly...
 942                         'page_len'          => 0, # Fill this in shortly...
 943                 ), __METHOD__, 'IGNORE' );
 944
 945                 $affected = $dbw->affectedRows();
 946
 947                 if ( $affected ) {
 948                         $newid = $dbw->insertId();
 949                         $this->mTitle->resetArticleID( $newid );
 950                 }
 951                 wfProfileOut( __METHOD__ );
 952
 953                 return $affected ? $newid : false;
 954         }
 955
 956         /**
 957          * Update the page record to point to a newly saved revision.
 958          *
 959          * @param $dbw DatabaseBase: object
 960          * @param $revision Revision: For ID number, and text used to set
 961          *                  length and redirect status fields
 962          * @param $lastRevision Integer: if given, will not overwrite the page field
 963          *                      when different from the currently set value.
 964          *                      Giving 0 indicates the new page flag should be set
 965          *                      on.
 966          * @param $lastRevIsRedirect Boolean: if given, will optimize adding and
 967          *                           removing rows in redirect table.
 968          * @return bool true on success, false on failure
 969          * @private
 970          */
 971         public function updateRevisionOn( $dbw, $revision, $lastRevision = null, $lastRevIsRedirect = null ) {
 972                 wfProfileIn( __METHOD__ );
 973
 974                 $text = $revision->getText();
 975                 $len = strlen( $text );
 976                 $rt = Title::newFromRedirectRecurse( $text );
 977
 978                 $conditions = array( 'page_id' => $this->getId() );
 979
 980                 if ( !is_null( $lastRevision ) ) {
 981                         # An extra check against threads stepping on each other
 982                         $conditions['page_latest'] = $lastRevision;
 983                 }
 984
 985                 $now = wfTimestampNow();
 986                 $dbw->update( 'page',
 987                         array( /* SET */
 988                                 'page_latest'      => $revision->getId(),
 989                                 'page_touched'     => $dbw->timestamp( $now ),
 990                                 'page_is_new'      => ( $lastRevision === 0 ) ? 1 : 0,
 991                                 'page_is_redirect' => $rt !== null ? 1 : 0,
 992                                 'page_len'         => $len,
 993                         ),
 994                         $conditions,
 995                         __METHOD__ );
 996
 997                 $result = $dbw->affectedRows() != 0;
 998                 if ( $result ) {
 999                         $this->updateRedirectOn( $dbw, $rt, $lastRevIsRedirect );
1000                         $this->setLastEdit( $revision );
1001                         $this->setCachedLastEditTime( $now );
1002                         $this->mLatest = $revision->getId();
1003                         $this->mIsRedirect = (bool)$rt;
1004                         # Update the LinkCache.
1005                         LinkCache::singleton()->addGoodLinkObj( $this->getId(), $this->mTitle, $len, $this->mIsRedirect, $this->mLatest );
1006                 }
1007
1008                 wfProfileOut( __METHOD__ );
1009                 return $result;
1010         }
1011
1012         /**
1013          * Add row to the redirect table if this is a redirect, remove otherwise.
1014          *
1015          * @param $dbw DatabaseBase
1016          * @param $redirectTitle Title object pointing to the redirect target,
1017          *                       or NULL if this is not a redirect
1018          * @param $lastRevIsRedirect If given, will optimize adding and
1019          *                           removing rows in redirect table.
1020          * @return bool true on success, false on failure
1021          * @private
1022          */
1023         public function updateRedirectOn( $dbw, $redirectTitle, $lastRevIsRedirect = null ) {
1024                 // Always update redirects (target link might have changed)
1025                 // Update/Insert if we don't know if the last revision was a redirect or not
1026                 // Delete if changing from redirect to non-redirect
1027                 $isRedirect = !is_null( $redirectTitle );
1028
1029                 if ( !$isRedirect && $lastRevIsRedirect === false ) {
1030                         return true;
1031                 }
1032
1033                 wfProfileIn( __METHOD__ );
1034                 if ( $isRedirect ) {
1035                         $this->insertRedirectEntry( $redirectTitle );
1036                 } else {
1037                         // This is not a redirect, remove row from redirect table
1038                         $where = array( 'rd_from' => $this->getId() );
1039                         $dbw->delete( 'redirect', $where, __METHOD__ );
1040                 }
1041
1042                 if ( $this->getTitle()->getNamespace() == NS_FILE ) {
1043                         RepoGroup::singleton()->getLocalRepo()->invalidateImageRedirect( $this->getTitle() );
1044                 }
1045                 wfProfileOut( __METHOD__ );
1046
1047                 return ( $dbw->affectedRows() != 0 );
1048         }
1049
1050         /**
1051          * If the given revision is newer than the currently set page_latest,
1052          * update the page record. Otherwise, do nothing.
1053          *
1054          * @param $dbw Database object
1055          * @param $revision Revision object
1056          * @return mixed
1057          */
1058         public function updateIfNewerOn( $dbw, $revision ) {
1059                 wfProfileIn( __METHOD__ );
1060
1061                 $row = $dbw->selectRow(
1062                         array( 'revision', 'page' ),
1063                         array( 'rev_id', 'rev_timestamp', 'page_is_redirect' ),
1064                         array(
1065                                 'page_id' => $this->getId(),
1066                                 'page_latest=rev_id' ),
1067                         __METHOD__ );
1068
1069                 if ( $row ) {
1070                         if ( wfTimestamp( TS_MW, $row->rev_timestamp ) >= $revision->getTimestamp() ) {
1071                                 wfProfileOut( __METHOD__ );
1072                                 return false;
1073                         }
1074                         $prev = $row->rev_id;
1075                         $lastRevIsRedirect = (bool)$row->page_is_redirect;
1076                 } else {
1077                         # No or missing previous revision; mark the page as new
1078                         $prev = 0;
1079                         $lastRevIsRedirect = null;
1080                 }
1081
1082                 $ret = $this->updateRevisionOn( $dbw, $revision, $prev, $lastRevIsRedirect );
1083
1084                 wfProfileOut( __METHOD__ );
1085                 return $ret;
1086         }
1087
1088         /**
1089          * Get the text that needs to be saved in order to undo all revisions
1090          * between $undo and $undoafter. Revisions must belong to the same page,
1091          * must exist and must not be deleted
1092          * @param $undo Revision
1093          * @param $undoafter Revision Must be an earlier revision than $undo
1094          * @return mixed string on success, false on failure
1095          */
1096         public function getUndoText( Revision $undo, Revision $undoafter = null ) {
1097                 $cur_text = $this->getRawText();
1098                 if ( $cur_text === false ) {
1099                         return false; // no page
1100                 }
1101                 $undo_text = $undo->getText();
1102                 $undoafter_text = $undoafter->getText();
1103
1104                 if ( $cur_text == $undo_text ) {
1105                         # No use doing a merge if it's just a straight revert.
1106                         return $undoafter_text;
1107                 }
1108
1109                 $undone_text = '';
1110
1111                 if ( !wfMerge( $undo_text, $undoafter_text, $cur_text, $undone_text ) ) {
1112                         return false;
1113                 }
1114
1115                 return $undone_text;
1116         }
1117
1118         /**
1119          * @param $section empty/null/false or a section number (0, 1, 2, T1, T2...)
1120          * @param $text String: new text of the section
1121          * @param $sectionTitle String: new section's subject, only if $section is 'new'
1122          * @param $edittime String: revision timestamp or null to use the current revision
1123          * @return string Complete article text, or null if error
1124          */
1125         public function replaceSection( $section, $text, $sectionTitle = '', $edittime = null ) {
1126                 wfProfileIn( __METHOD__ );
1127
1128                 if ( strval( $section ) == '' ) {
1129                         // Whole-page edit; let the whole text through
1130                 } else {
1131                         // Bug 30711: always use current version when adding a new section
1132                         if ( is_null( $edittime ) || $section == 'new' ) {
1133                                 $oldtext = $this->getRawText();
1134                                 if ( $oldtext === false ) {
1135                                         wfDebug( __METHOD__ . ": no page text\n" );
1136                                         wfProfileOut( __METHOD__ );
1137                                         return null;
1138                                 }
1139                         } else {
1140                                 $dbw = wfGetDB( DB_MASTER );
1141                                 $rev = Revision::loadFromTimestamp( $dbw, $this->mTitle, $edittime );
1142
1143                                 if ( !$rev ) {
1144                                         wfDebug( "WikiPage::replaceSection asked for bogus section (page: " .
1145                                                 $this->getId() . "; section: $section; edittime: $edittime)\n" );
1146                                         wfProfileOut( __METHOD__ );
1147                                         return null;
1148                                 }
1149
1150                                 $oldtext = $rev->getText();
1151                         }
1152
1153                         if ( $section == 'new' ) {
1154                                 # Inserting a new section
1155                                 $subject = $sectionTitle ? wfMsgForContent( 'newsectionheaderdefaultlevel', $sectionTitle ) . "\n\n" : '';
1156                                 if ( wfRunHooks( 'PlaceNewSection', array( $this, $oldtext, $subject, &$text ) ) ) {
1157                                         $text = strlen( trim( $oldtext ) ) > 0
1158                                                 ? "{$oldtext}\n\n{$subject}{$text}"
1159                                                 : "{$subject}{$text}";
1160                                 }
1161                         } else {
1162                                 # Replacing an existing section; roll out the big guns
1163                                 global $wgParser;
1164
1165                                 $text = $wgParser->replaceSection( $oldtext, $section, $text );
1166                         }
1167                 }
1168
1169                 wfProfileOut( __METHOD__ );
1170                 return $text;
1171         }
1172
1173         /**
1174          * Check flags and add EDIT_NEW or EDIT_UPDATE to them as needed.
1175          * @param $flags Int
1176          * @return Int updated $flags
1177          */
1178         function checkFlags( $flags ) {
1179                 if ( !( $flags & EDIT_NEW ) && !( $flags & EDIT_UPDATE ) ) {
1180                         if ( $this->mTitle->getArticleID() ) {
1181                                 $flags |= EDIT_UPDATE;
1182                         } else {
1183                                 $flags |= EDIT_NEW;
1184                         }
1185                 }
1186
1187                 return $flags;
1188         }
1189
1190         /**
1191          * Change an existing article or create a new article. Updates RC and all necessary caches,
1192          * optionally via the deferred update array.
1193          *
1194          * @param $text String: new text
1195          * @param $summary String: edit summary
1196          * @param $flags Integer bitfield:
1197          *      EDIT_NEW
1198          *          Article is known or assumed to be non-existent, create a new one
1199          *      EDIT_UPDATE
1200          *          Article is known or assumed to be pre-existing, update it
1201          *      EDIT_MINOR
1202          *          Mark this edit minor, if the user is allowed to do so
1203          *      EDIT_SUPPRESS_RC
1204          *          Do not log the change in recentchanges
1205          *      EDIT_FORCE_BOT
1206          *          Mark the edit a "bot" edit regardless of user rights
1207          *      EDIT_DEFER_UPDATES
1208          *          Defer some of the updates until the end of index.php
1209          *      EDIT_AUTOSUMMARY
1210          *          Fill in blank summaries with generated text where possible
1211          *
1212          * If neither EDIT_NEW nor EDIT_UPDATE is specified, the status of the article will be detected.
1213          * If EDIT_UPDATE is specified and the article doesn't exist, the function will return an
1214          * edit-gone-missing error. If EDIT_NEW is specified and the article does exist, an
1215          * edit-already-exists error will be returned. These two conditions are also possible with
1216          * auto-detection due to MediaWiki's performance-optimised locking strategy.
1217          *
1218          * @param $baseRevId the revision ID this edit was based off, if any
1219          * @param $user User the user doing the edit
1220          *
1221          * @return Status object. Possible errors:
1222          *     edit-hook-aborted:       The ArticleSave hook aborted the edit but didn't set the fatal flag of $status
1223          *     edit-gone-missing:       In update mode, but the article didn't exist
1224          *     edit-conflict:           In update mode, the article changed unexpectedly
1225          *     edit-no-change:          Warning that the text was the same as before
1226          *     edit-already-exists:     In creation mode, but the article already exists
1227          *
1228          *  Extensions may define additional errors.
1229          *
1230          *  $return->value will contain an associative array with members as follows:
1231          *     new:                     Boolean indicating if the function attempted to create a new article
1232          *     revision:                The revision object for the inserted revision, or null
1233          *
1234          *  Compatibility note: this function previously returned a boolean value indicating success/failure
1235          */
1236         public function doEdit( $text, $summary, $flags = 0, $baseRevId = false, $user = null ) {
1237                 global $wgUser, $wgDBtransactions, $wgUseAutomaticEditSummaries;
1238
1239                 # Low-level sanity check
1240                 if ( $this->mTitle->getText() === '' ) {
1241                         throw new MWException( 'Something is trying to edit an article with an empty title' );
1242                 }
1243
1244                 wfProfileIn( __METHOD__ );
1245
1246                 $user = is_null( $user ) ? $wgUser : $user;
1247                 $status = Status::newGood( array() );
1248
1249                 # Load $this->mTitle->getArticleID() and $this->mLatest if it's not already
1250                 $this->loadPageData( 'fromdbmaster' );
1251
1252                 $flags = $this->checkFlags( $flags );
1253
1254                 if ( !wfRunHooks( 'ArticleSave', array( &$this, &$user, &$text, &$summary,
1255                         $flags & EDIT_MINOR, null, null, &$flags, &$status ) ) )
1256                 {
1257                         wfDebug( __METHOD__ . ": ArticleSave hook aborted save!\n" );
1258
1259                         if ( $status->isOK() ) {
1260                                 $status->fatal( 'edit-hook-aborted' );
1261                         }
1262
1263                         wfProfileOut( __METHOD__ );
1264                         return $status;
1265                 }
1266
1267                 # Silently ignore EDIT_MINOR if not allowed
1268                 $isminor = ( $flags & EDIT_MINOR ) && $user->isAllowed( 'minoredit' );
1269                 $bot = $flags & EDIT_FORCE_BOT;
1270
1271                 $oldtext = $this->getRawText(); // current revision
1272                 $oldsize = strlen( $oldtext );
1273                 $oldid = $this->getLatest();
1274                 $oldIsRedirect = $this->isRedirect();
1275                 $oldcountable = $this->isCountable();
1276
1277                 # Provide autosummaries if one is not provided and autosummaries are enabled.
1278                 if ( $wgUseAutomaticEditSummaries && $flags & EDIT_AUTOSUMMARY && $summary == '' ) {
1279                         $summary = self::getAutosummary( $oldtext, $text, $flags );
1280                 }
1281
1282                 $editInfo = $this->prepareTextForEdit( $text, null, $user );
1283                 $text = $editInfo->pst;
1284                 $newsize = strlen( $text );
1285
1286                 $dbw = wfGetDB( DB_MASTER );
1287                 $now = wfTimestampNow();
1288                 $this->mTimestamp = $now;
1289
1290                 if ( $flags & EDIT_UPDATE ) {
1291                         # Update article, but only if changed.
1292                         $status->value['new'] = false;
1293
1294                         if ( !$oldid ) {
1295                                 # Article gone missing
1296                                 wfDebug( __METHOD__ . ": EDIT_UPDATE specified but article doesn't exist\n" );
1297                                 $status->fatal( 'edit-gone-missing' );
1298
1299                                 wfProfileOut( __METHOD__ );
1300                                 return $status;
1301                         }
1302
1303                         # Make sure the revision is either completely inserted or not inserted at all
1304                         if ( !$wgDBtransactions ) {
1305                                 $userAbort = ignore_user_abort( true );
1306                         }
1307
1308                         $revision = new Revision( array(
1309                                 'page'       => $this->getId(),
1310                                 'comment'    => $summary,
1311                                 'minor_edit' => $isminor,
1312                                 'text'       => $text, #FIXME: set content instead, leavfe serialization to revision?!
1313                                 'parent_id'  => $oldid,
1314                                 'user'       => $user->getId(),
1315                                 'user_text'  => $user->getName(),
1316                                 'timestamp'  => $now
1317                         ) );
1318
1319                         $changed = ( strcmp( $text, $oldtext ) != 0 );
1320
1321                         if ( $changed ) {
1322                                 $dbw->begin();
1323                                 $revisionId = $revision->insertOn( $dbw );
1324
1325                                 # Update page
1326                                 #
1327                                 # Note that we use $this->mLatest instead of fetching a value from the master DB
1328                                 # during the course of this function. This makes sure that EditPage can detect
1329                                 # edit conflicts reliably, either by $ok here, or by $article->getTimestamp()
1330                                 # before this function is called. A previous function used a separate query, this
1331                                 # creates a window where concurrent edits can cause an ignored edit conflict.
1332                                 $ok = $this->updateRevisionOn( $dbw, $revision, $oldid, $oldIsRedirect );
1333
1334                                 if ( !$ok ) {
1335                                         /* Belated edit conflict! Run away!! */
1336                                         $status->fatal( 'edit-conflict' );
1337
1338                                         # Delete the invalid revision if the DB is not transactional
1339                                         if ( !$wgDBtransactions ) {
1340                                                 $dbw->delete( 'revision', array( 'rev_id' => $revisionId ), __METHOD__ );
1341                                         }
1342
1343                                         $revisionId = 0;
1344                                         $dbw->rollback();
1345                                 } else {
1346                                         global $wgUseRCPatrol;
1347                                         wfRunHooks( 'NewRevisionFromEditComplete', array( $this, $revision, $baseRevId, $user ) );
1348                                         # Update recentchanges
1349                                         if ( !( $flags & EDIT_SUPPRESS_RC ) ) {
1350                                                 # Mark as patrolled if the user can do so
1351                                                 $patrolled = $wgUseRCPatrol && !count(
1352                                                         $this->mTitle->getUserPermissionsErrors( 'autopatrol', $user ) );
1353                                                 # Add RC row to the DB
1354                                                 $rc = RecentChange::notifyEdit( $now, $this->mTitle, $isminor, $user, $summary,
1355                                                         $oldid, $this->getTimestamp(), $bot, '', $oldsize, $newsize,
1356                                                         $revisionId, $patrolled
1357                                                 );
1358
1359                                                 # Log auto-patrolled edits
1360                                                 if ( $patrolled ) {
1361                                                         PatrolLog::record( $rc, true );
1362                                                 }
1363                                         }
1364                                         $user->incEditCount();
1365                                         $dbw->commit();
1366                                 }
1367                         } else {
1368                                 // Bug 32948: revision ID must be set to page {{REVISIONID}} and
1369                                 // related variables correctly
1370                                 $revision->setId( $this->getLatest() );
1371                         }
1372
1373                         if ( !$wgDBtransactions ) {
1374                                 ignore_user_abort( $userAbort );
1375                         }
1376
1377                         // Now that ignore_user_abort is restored, we can respond to fatal errors
1378                         if ( !$status->isOK() ) {
1379                                 wfProfileOut( __METHOD__ );
1380                                 return $status;
1381                         }
1382
1383                         # Update links tables, site stats, etc.
1384                         $this->doEditUpdates( $revision, $user, array( 'changed' => $changed,
1385                                 'oldcountable' => $oldcountable ) );
1386
1387                         if ( !$changed ) {
1388                                 $status->warning( 'edit-no-change' );
1389                                 $revision = null;
1390                                 // Update page_touched, this is usually implicit in the page update
1391                                 // Other cache updates are done in onArticleEdit()
1392                                 $this->mTitle->invalidateCache();
1393                         }
1394                 } else {
1395                         # Create new article
1396                         $status->value['new'] = true;
1397
1398                         $dbw->begin();
1399
1400                         # Add the page record; stake our claim on this title!
1401                         # This will return false if the article already exists
1402                         $newid = $this->insertOn( $dbw );
1403
1404                         if ( $newid === false ) {
1405                                 $dbw->rollback();
1406                                 $status->fatal( 'edit-already-exists' );
1407
1408                                 wfProfileOut( __METHOD__ );
1409                                 return $status;
1410                         }
1411
1412                         # Save the revision text...
1413                         $revision = new Revision( array(
1414                                 'page'       => $newid,
1415                                 'comment'    => $summary,
1416                                 'minor_edit' => $isminor,
1417                                 'text'       => $text,
1418                                 'user'       => $user->getId(),
1419                                 'user_text'  => $user->getName(),
1420                                 'timestamp'  => $now
1421                         ) );
1422                         $revisionId = $revision->insertOn( $dbw );
1423
1424                         # Update the page record with revision data
1425                         $this->updateRevisionOn( $dbw, $revision, 0 );
1426
1427                         wfRunHooks( 'NewRevisionFromEditComplete', array( $this, $revision, false, $user ) );
1428
1429                         # Update recentchanges
1430                         if ( !( $flags & EDIT_SUPPRESS_RC ) ) {
1431                                 global $wgUseRCPatrol, $wgUseNPPatrol;
1432
1433                                 # Mark as patrolled if the user can do so
1434                                 $patrolled = ( $wgUseRCPatrol || $wgUseNPPatrol ) && !count(
1435                                         $this->mTitle->getUserPermissionsErrors( 'autopatrol', $user ) );
1436                                 # Add RC row to the DB
1437                                 $rc = RecentChange::notifyNew( $now, $this->mTitle, $isminor, $user, $summary, $bot,
1438                                         '', strlen( $text ), $revisionId, $patrolled );
1439
1440                                 # Log auto-patrolled edits
1441                                 if ( $patrolled ) {
1442                                         PatrolLog::record( $rc, true );
1443                                 }
1444                         }
1445                         $user->incEditCount();
1446                         $dbw->commit();
1447
1448                         # Update links, etc.
1449                         $this->doEditUpdates( $revision, $user, array( 'created' => true ) );
1450
1451                         wfRunHooks( 'ArticleInsertComplete', array( &$this, &$user, $text, $summary,
1452                                 $flags & EDIT_MINOR, null, null, &$flags, $revision ) );
1453                 }
1454
1455                 # Do updates right now unless deferral was requested
1456                 if ( !( $flags & EDIT_DEFER_UPDATES ) ) {
1457                         DeferredUpdates::doUpdates();
1458                 }
1459
1460                 // Return the new revision (or null) to the caller
1461                 $status->value['revision'] = $revision;
1462
1463                 wfRunHooks( 'ArticleSaveComplete', array( &$this, &$user, $text, $summary,
1464                         $flags & EDIT_MINOR, null, null, &$flags, $revision, &$status, $baseRevId ) );
1465
1466                 # Promote user to any groups they meet the criteria for
1467                 $user->addAutopromoteOnceGroups( 'onEdit' );
1468
1469                 wfProfileOut( __METHOD__ );
1470                 return $status;
1471         }
1472
1473         /**
1474          * Get parser options suitable for rendering the primary article wikitext
1475          * @param User|string $user User object or 'canonical'
1476          * @return ParserOptions
1477          */
1478         public function makeParserOptions( $user ) {
1479                 global $wgContLang;
1480                 if ( $user instanceof User ) { // settings per user (even anons)
1481                         $options = ParserOptions::newFromUser( $user );
1482                 } else { // canonical settings
1483                         $options = ParserOptions::newFromUserAndLang( new User, $wgContLang );
1484                 }
1485                 $options->enableLimitReport(); // show inclusion/loop reports
1486                 $options->setTidy( true ); // fix bad HTML
1487                 return $options;
1488         }
1489
1490         /**
1491          * Prepare text which is about to be saved.
1492          * Returns a stdclass with source, pst and output members
1493          */
1494         public function prepareTextForEdit( $text, $revid = null, User $user = null ) {
1495                 global $wgParser, $wgContLang, $wgUser;
1496                 $user = is_null( $user ) ? $wgUser : $user;
1497                 // @TODO fixme: check $user->getId() here???
1498                 if ( $this->mPreparedEdit
1499                         && $this->mPreparedEdit->newText == $text
1500                         && $this->mPreparedEdit->revid == $revid
1501                 ) {
1502                         // Already prepared
1503                         return $this->mPreparedEdit;
1504                 }
1505
1506                 $popts = ParserOptions::newFromUserAndLang( $user, $wgContLang );
1507                 wfRunHooks( 'ArticlePrepareTextForEdit', array( $this, $popts ) );
1508
1509                 $edit = (object)array();
1510                 $edit->revid = $revid;
1511                 $edit->newText = $text;
1512                 $edit->pst = $wgParser->preSaveTransform( $text, $this->mTitle, $user, $popts );
1513                 $edit->popts = $this->makeParserOptions( 'canonical' );
1514                 $edit->output = $wgParser->parse( $edit->pst, $this->mTitle, $edit->popts, true, true, $revid );
1515                 $edit->oldText = $this->getRawText();
1516
1517                 $this->mPreparedEdit = $edit;
1518
1519                 return $edit;
1520         }
1521
1522         /**
1523          * Do standard deferred updates after page edit.
1524          * Update links tables, site stats, search index and message cache.
1525          * Purges pages that include this page if the text was changed here.
1526          * Every 100th edit, prune the recent changes table.
1527          *
1528          * @private
1529          * @param $revision Revision object
1530          * @param $user User object that did the revision
1531          * @param $options Array of options, following indexes are used:
1532          * - changed: boolean, whether the revision changed the content (default true)
1533          * - created: boolean, whether the revision created the page (default false)
1534          * - oldcountable: boolean or null (default null):
1535          *   - boolean: whether the page was counted as an article before that
1536          *     revision, only used in changed is true and created is false
1537          *   - null: don't change the article count
1538          */
1539         public function doEditUpdates( Revision $revision, User $user, array $options = array() ) {
1540                 global $wgEnableParserCache;
1541
1542                 wfProfileIn( __METHOD__ );
1543
1544                 $options += array( 'changed' => true, 'created' => false, 'oldcountable' => null );
1545                 $text = $revision->getText();
1546
1547                 # Parse the text
1548                 # Be careful not to double-PST: $text is usually already PST-ed once
1549                 if ( !$this->mPreparedEdit || $this->mPreparedEdit->output->getFlag( 'vary-revision' ) ) {
1550                         wfDebug( __METHOD__ . ": No prepared edit or vary-revision is set...\n" );
1551                         $editInfo = $this->prepareTextForEdit( $text, $revision->getId(), $user );
1552                 } else {
1553                         wfDebug( __METHOD__ . ": No vary-revision, using prepared edit...\n" );
1554                         $editInfo = $this->mPreparedEdit;
1555                 }
1556
1557                 # Save it to the parser cache
1558                 if ( $wgEnableParserCache ) {
1559                         $parserCache = ParserCache::singleton();
1560                         $parserCache->save( $editInfo->output, $this, $editInfo->popts );
1561                 }
1562
1563                 # Update the links tables
1564                 $u = new LinksUpdate( $this->mTitle, $editInfo->output );
1565                 $u->doUpdate();
1566
1567                 wfRunHooks( 'ArticleEditUpdates', array( &$this, &$editInfo, $options['changed'] ) );
1568
1569                 if ( wfRunHooks( 'ArticleEditUpdatesDeleteFromRecentchanges', array( &$this ) ) ) {
1570                         if ( 0 == mt_rand( 0, 99 ) ) {
1571                                 // Flush old entries from the `recentchanges` table; we do this on
1572                                 // random requests so as to avoid an increase in writes for no good reason
1573                                 global $wgRCMaxAge;
1574
1575                                 $dbw = wfGetDB( DB_MASTER );
1576                                 $cutoff = $dbw->timestamp( time() - $wgRCMaxAge );
1577                                 $dbw->delete(
1578                                         'recentchanges',
1579                                         array( "rc_timestamp < '$cutoff'" ),
1580                                         __METHOD__
1581                                 );
1582                         }
1583                 }
1584
1585                 if ( !$this->mTitle->exists() ) {
1586                         wfProfileOut( __METHOD__ );
1587                         return;
1588                 }
1589
1590                 $id = $this->getId();
1591                 $title = $this->mTitle->getPrefixedDBkey();
1592                 $shortTitle = $this->mTitle->getDBkey();
1593
1594                 if ( !$options['changed'] ) {
1595                         $good = 0;
1596                         $total = 0;
1597                 } elseif ( $options['created'] ) {
1598                         $good = (int)$this->isCountable( $editInfo );
1599                         $total = 1;
1600                 } elseif ( $options['oldcountable'] !== null ) {
1601                         $good = (int)$this->isCountable( $editInfo ) - (int)$options['oldcountable'];
1602                         $total = 0;
1603                 } else {
1604                         $good = 0;
1605                         $total = 0;
1606                 }
1607
1608                 DeferredUpdates::addUpdate( new SiteStatsUpdate( 0, 1, $good, $total ) );
1609                 DeferredUpdates::addUpdate( new SearchUpdate( $id, $title, $text ) );
1610
1611                 # If this is another user's talk page, update newtalk.
1612                 # Don't do this if $options['changed'] = false (null-edits) nor if
1613                 # it's a minor edit and the user doesn't want notifications for those.
1614                 if ( $options['changed']
1615                         && $this->mTitle->getNamespace() == NS_USER_TALK
1616                         && $shortTitle != $user->getTitleKey()
1617                         && !( $revision->isMinor() && $user->isAllowed( 'nominornewtalk' ) )
1618                 ) {
1619                         if ( wfRunHooks( 'ArticleEditUpdateNewTalk', array( &$this ) ) ) {
1620                                 $other = User::newFromName( $shortTitle, false );
1621                                 if ( !$other ) {
1622                                         wfDebug( __METHOD__ . ": invalid username\n" );
1623                                 } elseif ( User::isIP( $shortTitle ) ) {
1624                                         // An anonymous user
1625                                         $other->setNewtalk( true );
1626                                 } elseif ( $other->isLoggedIn() ) {
1627                                         $other->setNewtalk( true );
1628                                 } else {
1629                                         wfDebug( __METHOD__ . ": don't need to notify a nonexistent user\n" );
1630                                 }
1631                         }
1632                 }
1633
1634                 if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
1635                         MessageCache::singleton()->replace( $shortTitle, $text );
1636                 }
1637
1638                 if( $options['created'] ) {
1639                         self::onArticleCreate( $this->mTitle );
1640                 } else {
1641                         self::onArticleEdit( $this->mTitle );
1642                 }
1643
1644                 wfProfileOut( __METHOD__ );
1645         }
1646
1647         /**
1648          * Edit an article without doing all that other stuff
1649          * The article must already exist; link tables etc
1650          * are not updated, caches are not flushed.
1651          *
1652          * @param $text String: text submitted
1653          * @param $user User The relevant user
1654          * @param $comment String: comment submitted
1655          * @param $minor Boolean: whereas it's a minor modification
1656          */
1657         public function doQuickEdit( $text, User $user, $comment = '', $minor = 0 ) {
1658                 wfProfileIn( __METHOD__ );
1659
1660                 $dbw = wfGetDB( DB_MASTER );
1661                 $revision = new Revision( array(
1662                         'page'       => $this->getId(),
1663                         'text'       => $text,
1664                         'comment'    => $comment,
1665                         'minor_edit' => $minor ? 1 : 0,
1666                 ) );
1667                 $revision->insertOn( $dbw );
1668                 $this->updateRevisionOn( $dbw, $revision );
1669
1670                 wfRunHooks( 'NewRevisionFromEditComplete', array( $this, $revision, false, $user ) );
1671
1672                 wfProfileOut( __METHOD__ );
1673         }
1674
1675         /**
1676          * Update the article's restriction field, and leave a log entry.
1677          * This works for protection both existing and non-existing pages.
1678          *
1679          * @param $limit Array: set of restriction keys
1680          * @param $reason String
1681          * @param &$cascade Integer. Set to false if cascading protection isn't allowed.
1682          * @param $expiry Array: per restriction type expiration
1683          * @param $user User The user updating the restrictions
1684          * @return bool true on success
1685          */
1686         public function doUpdateRestrictions( array $limit, array $expiry, &$cascade, $reason, User $user ) {
1687                 global $wgContLang;
1688
1689                 if ( wfReadOnly() ) {
1690                         return Status::newFatal( 'readonlytext', wfReadOnlyReason() );
1691                 }
1692
1693                 $restrictionTypes = $this->mTitle->getRestrictionTypes();
1694
1695                 $id = $this->mTitle->getArticleID();
1696
1697                 if ( !$cascade ) {
1698                         $cascade = false;
1699                 }
1700
1701                 // Take this opportunity to purge out expired restrictions
1702                 Title::purgeExpiredRestrictions();
1703
1704                 # @todo FIXME: Same limitations as described in ProtectionForm.php (line 37);
1705                 # we expect a single selection, but the schema allows otherwise.
1706                 $isProtected = false;
1707                 $protect = false;
1708                 $changed = false;
1709
1710                 $dbw = wfGetDB( DB_MASTER );
1711
1712                 foreach ( $restrictionTypes as $action ) {
1713                         if ( !isset( $expiry[$action] ) ) {
1714                                 $expiry[$action] = $dbw->getInfinity();
1715                         }
1716                         if ( !isset( $limit[$action] ) ) {
1717                                 $limit[$action] = '';
1718                         } elseif ( $limit[$action] != '' ) {
1719                                 $protect = true;
1720                         }
1721
1722                         # Get current restrictions on $action
1723                         $current = implode( '', $this->mTitle->getRestrictions( $action ) );
1724                         if ( $current != '' ) {
1725                                 $isProtected = true;
1726                         }
1727
1728                         if ( $limit[$action] != $current ) {
1729                                 $changed = true;
1730                         } elseif ( $limit[$action] != '' ) {
1731                                 # Only check expiry change if the action is actually being
1732                                 # protected, since expiry does nothing on an not-protected
1733                                 # action.
1734                                 if ( $this->mTitle->getRestrictionExpiry( $action ) != $expiry[$action] ) {
1735                                         $changed = true;
1736                                 }
1737                         }
1738                 }
1739
1740                 if ( !$changed && $protect && $this->mTitle->areRestrictionsCascading() != $cascade ) {
1741                         $changed = true;
1742                 }
1743
1744                 # If nothing's changed, do nothing
1745                 if ( !$changed ) {
1746                         return Status::newGood();
1747                 }
1748
1749                 if ( !$protect ) { # No protection at all means unprotection
1750                         $revCommentMsg = 'unprotectedarticle';
1751                         $logAction = 'unprotect';
1752                 } elseif ( $isProtected ) {
1753                         $revCommentMsg = 'modifiedarticleprotection';
1754                         $logAction = 'modify';
1755                 } else {
1756                         $revCommentMsg = 'protectedarticle';
1757                         $logAction = 'protect';
1758                 }
1759
1760                 $encodedExpiry = array();
1761                 $protectDescription = '';
1762                 foreach ( $limit as $action => $restrictions ) {
1763                         $encodedExpiry[$action] = $dbw->encodeExpiry( $expiry[$action] );
1764                         if ( $restrictions != '' ) {
1765                                 $protectDescription .= $wgContLang->getDirMark() . "[$action=$restrictions] (";
1766                                 if ( $encodedExpiry[$action] != 'infinity' ) {
1767                                         $protectDescription .= wfMsgForContent( 'protect-expiring',
1768                                                 $wgContLang->timeanddate( $expiry[$action], false, false ) ,
1769                                                 $wgContLang->date( $expiry[$action], false, false ) ,
1770                                                 $wgContLang->time( $expiry[$action], false, false ) );
1771                                 } else {
1772                                         $protectDescription .= wfMsgForContent( 'protect-expiry-indefinite' );
1773                                 }
1774
1775                                 $protectDescription .= ') ';
1776                         }
1777                 }
1778                 $protectDescription = trim( $protectDescription );
1779
1780                 if ( $id ) { # Protection of existing page
1781                         if ( !wfRunHooks( 'ArticleProtect', array( &$this, &$user, $limit, $reason ) ) ) {
1782                                 return Status::newGood();
1783                         }
1784
1785                         # Only restrictions with the 'protect' right can cascade...
1786                         # Otherwise, people who cannot normally protect can "protect" pages via transclusion
1787                         $editrestriction = isset( $limit['edit'] ) ? array( $limit['edit'] ) : $this->mTitle->getRestrictions( 'edit' );
1788
1789                         # The schema allows multiple restrictions
1790                         if ( !in_array( 'protect', $editrestriction ) && !in_array( 'sysop', $editrestriction ) ) {
1791                                 $cascade = false;
1792                         }
1793
1794                         # Update restrictions table
1795                         foreach ( $limit as $action => $restrictions ) {
1796                                 if ( $restrictions != '' ) {
1797                                         $dbw->replace( 'page_restrictions', array( array( 'pr_page', 'pr_type' ) ),
1798                                                 array( 'pr_page' => $id,
1799                                                         'pr_type' => $action,
1800                                                         'pr_level' => $restrictions,
1801                                                         'pr_cascade' => ( $cascade && $action == 'edit' ) ? 1 : 0,
1802                                                         'pr_expiry' => $encodedExpiry[$action]
1803                                                 ),
1804                                                 __METHOD__
1805                                         );
1806                                 } else {
1807                                         $dbw->delete( 'page_restrictions', array( 'pr_page' => $id,
1808                                                 'pr_type' => $action ), __METHOD__ );
1809                                 }
1810                         }
1811
1812                         # Prepare a null revision to be added to the history
1813                         $editComment = $wgContLang->ucfirst( wfMsgForContent( $revCommentMsg, $this->mTitle->getPrefixedText() ) );
1814                         if ( $reason ) {
1815                                 $editComment .= ": $reason";
1816                         }
1817                         if ( $protectDescription ) {
1818                                 $editComment .= " ($protectDescription)";
1819                         }
1820                         if ( $cascade ) {
1821                                 $editComment .= ' [' . wfMsgForContent( 'protect-summary-cascade' ) . ']';
1822                         }
1823
1824                         # Insert a null revision
1825                         $nullRevision = Revision::newNullRevision( $dbw, $id, $editComment, true );
1826                         $nullRevId = $nullRevision->insertOn( $dbw );
1827
1828                         $latest = $this->getLatest();
1829                         # Update page record
1830                         $dbw->update( 'page',
1831                                 array( /* SET */
1832                                         'page_touched' => $dbw->timestamp(),
1833                                         'page_restrictions' => '',
1834                                         'page_latest' => $nullRevId
1835                                 ), array( /* WHERE */
1836                                         'page_id' => $id
1837                                 ), __METHOD__
1838                         );
1839
1840                         wfRunHooks( 'NewRevisionFromEditComplete', array( $this, $nullRevision, $latest, $user ) );
1841                         wfRunHooks( 'ArticleProtectComplete', array( &$this, &$user, $limit, $reason ) );
1842                 } else { # Protection of non-existing page (also known as "title protection")
1843                         # Cascade protection is meaningless in this case
1844                         $cascade = false;
1845
1846                         if ( $limit['create'] != '' ) {
1847                                 $dbw->replace( 'protected_titles',
1848                                         array( array( 'pt_namespace', 'pt_title' ) ),
1849                                         array(
1850                                                 'pt_namespace' => $this->mTitle->getNamespace(),
1851                                                 'pt_title' => $this->mTitle->getDBkey(),
1852                                                 'pt_create_perm' => $limit['create'],
1853                                                 'pt_timestamp' => $dbw->encodeExpiry( wfTimestampNow() ),
1854                                                 'pt_expiry' => $encodedExpiry['create'],
1855                                                 'pt_user' => $user->getId(),
1856                                                 'pt_reason' => $reason,
1857                                         ), __METHOD__
1858                                 );
1859                         } else {
1860                                 $dbw->delete( 'protected_titles',
1861                                         array(
1862                                                 'pt_namespace' => $this->mTitle->getNamespace(),
1863                                                 'pt_title' => $this->mTitle->getDBkey()
1864                                         ), __METHOD__
1865                                 );
1866                         }
1867                 }
1868
1869                 $this->mTitle->flushRestrictions();
1870
1871                 if ( $logAction == 'unprotect' ) {
1872                         $logParams = array();
1873                 } else {
1874                         $logParams = array( $protectDescription, $cascade ? 'cascade' : '' );
1875                 }
1876
1877                 # Update the protection log
1878                 $log = new LogPage( 'protect' );
1879                 $log->addEntry( $logAction, $this->mTitle, trim( $reason ), $logParams, $user );
1880
1881                 return Status::newGood();
1882         }
1883
1884         /**
1885          * Take an array of page restrictions and flatten it to a string
1886          * suitable for insertion into the page_restrictions field.
1887          * @param $limit Array
1888          * @return String
1889          */
1890         protected static function flattenRestrictions( $limit ) {
1891                 if ( !is_array( $limit ) ) {
1892                         throw new MWException( 'WikiPage::flattenRestrictions given non-array restriction set' );
1893                 }
1894
1895                 $bits = array();
1896                 ksort( $limit );
1897
1898                 foreach ( $limit as $action => $restrictions ) {
1899                         if ( $restrictions != '' ) {
1900                                 $bits[] = "$action=$restrictions";
1901                         }
1902                 }
1903
1904                 return implode( ':', $bits );
1905         }
1906
1907         /**
1908          * Back-end article deletion
1909          * Deletes the article with database consistency, writes logs, purges caches
1910          *
1911          * @param $reason string delete reason for deletion log
1912          * @param $suppress bitfield
1913          *      Revision::DELETED_TEXT
1914          *      Revision::DELETED_COMMENT
1915          *      Revision::DELETED_USER
1916          *      Revision::DELETED_RESTRICTED
1917          * @param $id int article ID
1918          * @param $commit boolean defaults to true, triggers transaction end
1919          * @param &$errors Array of errors to append to
1920          * @param $user User The relevant user
1921          * @return boolean true if successful
1922          */
1923         public function doDeleteArticle(
1924                 $reason, $suppress = false, $id = 0, $commit = true, &$error = '', User $user = null
1925         ) {
1926                 global $wgUser;
1927                 $user = is_null( $user ) ? $wgUser : $user;
1928
1929                 wfDebug( __METHOD__ . "\n" );
1930
1931                 if ( ! wfRunHooks( 'ArticleDelete', array( &$this, &$user, &$reason, &$error ) ) ) {
1932                         return false;
1933                 }
1934                 $dbw = wfGetDB( DB_MASTER );
1935                 $t = $this->mTitle->getDBkey();
1936                 $id = $id ? $id : $this->mTitle->getArticleID( Title::GAID_FOR_UPDATE );
1937
1938                 if ( $t === '' || $id == 0 ) {
1939                         return false;
1940                 }
1941
1942                 // Bitfields to further suppress the content
1943                 if ( $suppress ) {
1944                         $bitfield = 0;
1945                         // This should be 15...
1946                         $bitfield |= Revision::DELETED_TEXT;
1947                         $bitfield |= Revision::DELETED_COMMENT;
1948                         $bitfield |= Revision::DELETED_USER;
1949                         $bitfield |= Revision::DELETED_RESTRICTED;
1950                 } else {
1951                         $bitfield = 'rev_deleted';
1952                 }
1953
1954                 $dbw->begin();
1955                 // For now, shunt the revision data into the archive table.
1956                 // Text is *not* removed from the text table; bulk storage
1957                 // is left intact to avoid breaking block-compression or
1958                 // immutable storage schemes.
1959                 //
1960                 // For backwards compatibility, note that some older archive
1961                 // table entries will have ar_text and ar_flags fields still.
1962                 //
1963                 // In the future, we may keep revisions and mark them with
1964                 // the rev_deleted field, which is reserved for this purpose.
1965                 $dbw->insertSelect( 'archive', array( 'page', 'revision' ),
1966                         array(
1967                                 'ar_namespace'  => 'page_namespace',
1968                                 'ar_title'      => 'page_title',
1969                                 'ar_comment'    => 'rev_comment',
1970                                 'ar_user'       => 'rev_user',
1971                                 'ar_user_text'  => 'rev_user_text',
1972                                 'ar_timestamp'  => 'rev_timestamp',
1973                                 'ar_minor_edit' => 'rev_minor_edit',
1974                                 'ar_rev_id'     => 'rev_id',
1975                                 'ar_parent_id'  => 'rev_parent_id',
1976                                 'ar_text_id'    => 'rev_text_id',
1977                                 'ar_text'       => '\'\'', // Be explicit to appease
1978                                 'ar_flags'      => '\'\'', // MySQL's "strict mode"...
1979                                 'ar_len'        => 'rev_len',
1980                                 'ar_page_id'    => 'page_id',
1981                                 'ar_deleted'    => $bitfield,
1982                                 'ar_sha1'       => 'rev_content_model',
1983                                 'ar_content_format'       => 'rev_content_format',
1984                                 'ar_content_format'       => 'rev_sha1'
1985                         ), array(
1986                                 'page_id' => $id,
1987                                 'page_id = rev_page'
1988                         ), __METHOD__
1989                 );
1990
1991                 # Now that it's safely backed up, delete it
1992                 $dbw->delete( 'page', array( 'page_id' => $id ), __METHOD__ );
1993                 $ok = ( $dbw->affectedRows() > 0 ); // getArticleId() uses slave, could be laggy
1994
1995                 if ( !$ok ) {
1996                         $dbw->rollback();
1997                         return false;
1998                 }
1999
2000                 $this->doDeleteUpdates( $id );
2001
2002                 # Log the deletion, if the page was suppressed, log it at Oversight instead
2003                 $logtype = $suppress ? 'suppress' : 'delete';
2004
2005                 $logEntry = new ManualLogEntry( $logtype, 'delete' );
2006                 $logEntry->setPerformer( $user );
2007                 $logEntry->setTarget( $this->mTitle );
2008                 $logEntry->setComment( $reason );
2009                 $logid = $logEntry->insert();
2010                 $logEntry->publish( $logid );
2011
2012                 if ( $commit ) {
2013                         $dbw->commit();
2014                 }
2015
2016                 wfRunHooks( 'ArticleDeleteComplete', array( &$this, &$user, $reason, $id ) );
2017                 return true;
2018         }
2019
2020         /**
2021          * Do some database updates after deletion
2022          *
2023          * @param $id Int: page_id value of the page being deleted
2024          */
2025         public function doDeleteUpdates( $id ) {
2026                 DeferredUpdates::addUpdate( new SiteStatsUpdate( 0, 1, - (int)$this->isCountable(), -1 ) );
2027
2028                 $dbw = wfGetDB( DB_MASTER );
2029
2030                 # Delete restrictions for it
2031                 $dbw->delete( 'page_restrictions', array ( 'pr_page' => $id ), __METHOD__ );
2032
2033                 # Fix category table counts
2034                 $cats = array();
2035                 $res = $dbw->select( 'categorylinks', 'cl_to', array( 'cl_from' => $id ), __METHOD__ );
2036
2037                 foreach ( $res as $row ) {
2038                         $cats [] = $row->cl_to;
2039                 }
2040
2041                 $this->updateCategoryCounts( array(), $cats );
2042
2043                 # If using cascading deletes, we can skip some explicit deletes
2044                 if ( !$dbw->cascadingDeletes() ) {
2045                         $dbw->delete( 'revision', array( 'rev_page' => $id ), __METHOD__ );
2046
2047                         # Delete outgoing links
2048                         $dbw->delete( 'pagelinks', array( 'pl_from' => $id ), __METHOD__ );
2049                         $dbw->delete( 'imagelinks', array( 'il_from' => $id ), __METHOD__ );
2050                         $dbw->delete( 'categorylinks', array( 'cl_from' => $id ), __METHOD__ );
2051                         $dbw->delete( 'templatelinks', array( 'tl_from' => $id ), __METHOD__ );
2052                         $dbw->delete( 'externallinks', array( 'el_from' => $id ), __METHOD__ );
2053                         $dbw->delete( 'langlinks', array( 'll_from' => $id ), __METHOD__ );
2054                         $dbw->delete( 'iwlinks', array( 'iwl_from' => $id ), __METHOD__ );
2055                         $dbw->delete( 'redirect', array( 'rd_from' => $id ), __METHOD__ );
2056                         $dbw->delete( 'page_props', array( 'pp_page' => $id ), __METHOD__ );
2057                 }
2058
2059                 # If using cleanup triggers, we can skip some manual deletes
2060                 if ( !$dbw->cleanupTriggers() ) {
2061                         # Clean up recentchanges entries...
2062                         $dbw->delete( 'recentchanges',
2063                                 array( 'rc_type != ' . RC_LOG,
2064                                         'rc_namespace' => $this->mTitle->getNamespace(),
2065                                         'rc_title' => $this->mTitle->getDBkey() ),
2066                                 __METHOD__ );
2067                         $dbw->delete( 'recentchanges',
2068                                 array( 'rc_type != ' . RC_LOG, 'rc_cur_id' => $id ),
2069                                 __METHOD__ );
2070                 }
2071
2072                 # Clear caches
2073                 self::onArticleDelete( $this->mTitle );
2074
2075                 # Clear the cached article id so the interface doesn't act like we exist
2076                 $this->mTitle->resetArticleID( 0 );
2077         }
2078
2079         /**
2080          * Roll back the most recent consecutive set of edits to a page
2081          * from the same user; fails if there are no eligible edits to
2082          * roll back to, e.g. user is the sole contributor. This function
2083          * performs permissions checks on $user, then calls commitRollback()
2084          * to do the dirty work
2085          *
2086          * @todo: seperate the business/permission stuff out from backend code
2087          *
2088          * @param $fromP String: Name of the user whose edits to rollback.
2089          * @param $summary String: Custom summary. Set to default summary if empty.
2090          * @param $token String: Rollback token.
2091          * @param $bot Boolean: If true, mark all reverted edits as bot.
2092          *
2093          * @param $resultDetails Array: contains result-specific array of additional values
2094          *    'alreadyrolled' : 'current' (rev)
2095          *    success        : 'summary' (str), 'current' (rev), 'target' (rev)
2096          *
2097          * @param $user User The user performing the rollback
2098          * @return array of errors, each error formatted as
2099          *   array(messagekey, param1, param2, ...).
2100          * On success, the array is empty.  This array can also be passed to
2101          * OutputPage::showPermissionsErrorPage().
2102          */
2103         public function doRollback(
2104                 $fromP, $summary, $token, $bot, &$resultDetails, User $user
2105         ) {
2106                 $resultDetails = null;
2107
2108                 # Check permissions
2109                 $editErrors = $this->mTitle->getUserPermissionsErrors( 'edit', $user );
2110                 $rollbackErrors = $this->mTitle->getUserPermissionsErrors( 'rollback', $user );
2111                 $errors = array_merge( $editErrors, wfArrayDiff2( $rollbackErrors, $editErrors ) );
2112
2113                 if ( !$user->matchEditToken( $token, array( $this->mTitle->getPrefixedText(), $fromP ) ) ) {
2114                         $errors[] = array( 'sessionfailure' );
2115                 }
2116
2117                 if ( $user->pingLimiter( 'rollback' ) || $user->pingLimiter() ) {
2118                         $errors[] = array( 'actionthrottledtext' );
2119                 }
2120
2121                 # If there were errors, bail out now
2122                 if ( !empty( $errors ) ) {
2123                         return $errors;
2124                 }
2125
2126                 return $this->commitRollback( $fromP, $summary, $bot, $resultDetails, $user );
2127         }
2128
2129         /**
2130          * Backend implementation of doRollback(), please refer there for parameter
2131          * and return value documentation
2132          *
2133          * NOTE: This function does NOT check ANY permissions, it just commits the
2134          * rollback to the DB. Therefore, you should only call this function direct-
2135          * ly if you want to use custom permissions checks. If you don't, use
2136          * doRollback() instead.
2137          * @param $fromP String: Name of the user whose edits to rollback.
2138          * @param $summary String: Custom summary. Set to default summary if empty.
2139          * @param $bot Boolean: If true, mark all reverted edits as bot.
2140          *
2141          * @param $resultDetails Array: contains result-specific array of additional values
2142          * @param $guser User The user performing the rollback
2143          */
2144         public function commitRollback( $fromP, $summary, $bot, &$resultDetails, User $guser ) {
2145                 global $wgUseRCPatrol, $wgContLang;
2146
2147                 $dbw = wfGetDB( DB_MASTER );
2148
2149                 if ( wfReadOnly() ) {
2150                         return array( array( 'readonlytext' ) );
2151                 }
2152
2153                 # Get the last editor
2154                 $current = Revision::newFromTitle( $this->mTitle );
2155                 if ( is_null( $current ) ) {
2156                         # Something wrong... no page?
2157                         return array( array( 'notanarticle' ) );
2158                 }
2159
2160                 $from = str_replace( '_', ' ', $fromP );
2161                 # User name given should match up with the top revision.
2162                 # If the user was deleted then $from should be empty.
2163                 if ( $from != $current->getUserText() ) {
2164                         $resultDetails = array( 'current' => $current );
2165                         return array( array( 'alreadyrolled',
2166                                 htmlspecialchars( $this->mTitle->getPrefixedText() ),
2167                                 htmlspecialchars( $fromP ),
2168                                 htmlspecialchars( $current->getUserText() )
2169                         ) );
2170                 }
2171
2172                 # Get the last edit not by this guy...
2173                 # Note: these may not be public values
2174                 $user = intval( $current->getRawUser() );
2175                 $user_text = $dbw->addQuotes( $current->getRawUserText() );
2176                 $s = $dbw->selectRow( 'revision',
2177                         array( 'rev_id', 'rev_timestamp', 'rev_deleted' ),
2178                         array( 'rev_page' => $current->getPage(),
2179                                 "rev_user != {$user} OR rev_user_text != {$user_text}"
2180                         ), __METHOD__,
2181                         array( 'USE INDEX' => 'page_timestamp',
2182                                 'ORDER BY' => 'rev_timestamp DESC' )
2183                         );
2184                 if ( $s === false ) {
2185                         # No one else ever edited this page
2186                         return array( array( 'cantrollback' ) );
2187                 } elseif ( $s->rev_deleted & Revision::DELETED_TEXT || $s->rev_deleted & Revision::DELETED_USER ) {
2188                         # Only admins can see this text
2189                         return array( array( 'notvisiblerev' ) );
2190                 }
2191
2192                 $set = array();
2193                 if ( $bot && $guser->isAllowed( 'markbotedits' ) ) {
2194                         # Mark all reverted edits as bot
2195                         $set['rc_bot'] = 1;
2196                 }
2197
2198                 if ( $wgUseRCPatrol ) {
2199                         # Mark all reverted edits as patrolled
2200                         $set['rc_patrolled'] = 1;
2201                 }
2202
2203                 if ( count( $set ) ) {
2204                         $dbw->update( 'recentchanges', $set,
2205                                 array( /* WHERE */
2206                                         'rc_cur_id' => $current->getPage(),
2207                                         'rc_user_text' => $current->getUserText(),
2208                                         "rc_timestamp > '{$s->rev_timestamp}'",
2209                                 ), __METHOD__
2210                         );
2211                 }
2212
2213                 # Generate the edit summary if necessary
2214                 $target = Revision::newFromId( $s->rev_id );
2215                 if ( empty( $summary ) ) {
2216                         if ( $from == '' ) { // no public user name
2217                                 $summary = wfMsgForContent( 'revertpage-nouser' );
2218                         } else {
2219                                 $summary = wfMsgForContent( 'revertpage' );
2220                         }
2221                 }
2222
2223                 # Allow the custom summary to use the same args as the default message
2224                 $args = array(
2225                         $target->getUserText(), $from, $s->rev_id,
2226                         $wgContLang->timeanddate( wfTimestamp( TS_MW, $s->rev_timestamp ) ),
2227                         $current->getId(), $wgContLang->timeanddate( $current->getTimestamp() )
2228                 );
2229                 $summary = wfMsgReplaceArgs( $summary, $args );
2230
2231                 # Save
2232                 $flags = EDIT_UPDATE;
2233
2234                 if ( $guser->isAllowed( 'minoredit' ) ) {
2235                         $flags |= EDIT_MINOR;
2236                 }
2237
2238                 if ( $bot && ( $guser->isAllowedAny( 'markbotedits', 'bot' ) ) ) {
2239                         $flags |= EDIT_FORCE_BOT;
2240                 }
2241
2242                 # Actually store the edit
2243                 $status = $this->doEdit( $target->getText(), $summary, $flags, $target->getId(), $guser );
2244                 if ( !empty( $status->value['revision'] ) ) {
2245                         $revId = $status->value['revision']->getId();
2246                 } else {
2247                         $revId = false;
2248                 }
2249
2250                 wfRunHooks( 'ArticleRollbackComplete', array( $this, $guser, $target, $current ) );
2251
2252                 $resultDetails = array(
2253                         'summary' => $summary,
2254                         'current' => $current,
2255                         'target'  => $target,
2256                         'newid'   => $revId
2257                 );
2258
2259                 return array();
2260         }
2261
2262         /**
2263          * The onArticle*() functions are supposed to be a kind of hooks
2264          * which should be called whenever any of the specified actions
2265          * are done.
2266          *
2267          * This is a good place to put code to clear caches, for instance.
2268          *
2269          * This is called on page move and undelete, as well as edit
2270          *
2271          * @param $title Title object
2272          */
2273         public static function onArticleCreate( $title ) {
2274                 # Update existence markers on article/talk tabs...
2275                 if ( $title->isTalkPage() ) {
2276                         $other = $title->getSubjectPage();
2277                 } else {
2278                         $other = $title->getTalkPage();
2279                 }
2280
2281                 $other->invalidateCache();
2282                 $other->purgeSquid();
2283
2284                 $title->touchLinks();
2285                 $title->purgeSquid();
2286                 $title->deleteTitleProtection();
2287         }
2288
2289         /**
2290          * Clears caches when article is deleted
2291          *
2292          * @param $title Title
2293          */
2294         public static function onArticleDelete( $title ) {
2295                 # Update existence markers on article/talk tabs...
2296                 if ( $title->isTalkPage() ) {
2297                         $other = $title->getSubjectPage();
2298                 } else {
2299                         $other = $title->getTalkPage();
2300                 }
2301
2302                 $other->invalidateCache();
2303                 $other->purgeSquid();
2304
2305                 $title->touchLinks();
2306                 $title->purgeSquid();
2307
2308                 # File cache
2309                 HTMLFileCache::clearFileCache( $title );
2310
2311                 # Messages
2312                 if ( $title->getNamespace() == NS_MEDIAWIKI ) {
2313                         MessageCache::singleton()->replace( $title->getDBkey(), false );
2314                 }
2315
2316                 # Images
2317                 if ( $title->getNamespace() == NS_FILE ) {
2318                         $update = new HTMLCacheUpdate( $title, 'imagelinks' );
2319                         $update->doUpdate();
2320                 }
2321
2322                 # User talk pages
2323                 if ( $title->getNamespace() == NS_USER_TALK ) {
2324                         $user = User::newFromName( $title->getText(), false );
2325                         if ( $user ) {
2326                                 $user->setNewtalk( false );
2327                         }
2328                 }
2329
2330                 # Image redirects
2331                 RepoGroup::singleton()->getLocalRepo()->invalidateImageRedirect( $title );
2332         }
2333
2334         /**
2335          * Purge caches on page update etc
2336          *
2337          * @param $title Title object
2338          * @todo:  verify that $title is always a Title object (and never false or null), add Title hint to parameter $title
2339          */
2340         public static function onArticleEdit( $title ) {
2341                 // Invalidate caches of articles which include this page
2342                 DeferredUpdates::addHTMLCacheUpdate( $title, 'templatelinks' );
2343
2344
2345                 // Invalidate the caches of all pages which redirect here
2346                 DeferredUpdates::addHTMLCacheUpdate( $title, 'redirect' );
2347
2348                 # Purge squid for this page only
2349                 $title->purgeSquid();
2350
2351                 # Clear file cache for this page only
2352                 HTMLFileCache::clearFileCache( $title );
2353         }
2354
2355         /**#@-*/
2356
2357         /**
2358          * Returns a list of hidden categories this page is a member of.
2359          * Uses the page_props and categorylinks tables.
2360          *
2361          * @return Array of Title objects
2362          */
2363         public function getHiddenCategories() {
2364                 $result = array();
2365                 $id = $this->mTitle->getArticleID();
2366
2367                 if ( $id == 0 ) {
2368                         return array();
2369                 }
2370
2371                 $dbr = wfGetDB( DB_SLAVE );
2372                 $res = $dbr->select( array( 'categorylinks', 'page_props', 'page' ),
2373                         array( 'cl_to' ),
2374                         array( 'cl_from' => $id, 'pp_page=page_id', 'pp_propname' => 'hiddencat',
2375                                 'page_namespace' => NS_CATEGORY, 'page_title=cl_to' ),
2376                         __METHOD__ );
2377
2378                 if ( $res !== false ) {
2379                         foreach ( $res as $row ) {
2380                                 $result[] = Title::makeTitle( NS_CATEGORY, $row->cl_to );
2381                         }
2382                 }
2383
2384                 return $result;
2385         }
2386
2387         /**
2388         * Return an applicable autosummary if one exists for the given edit.
2389         * @param $oldtext String: the previous text of the page.
2390         * @param $newtext String: The submitted text of the page.
2391         * @param $flags Int bitmask: a bitmask of flags submitted for the edit.
2392         * @return string An appropriate autosummary, or an empty string.
2393         */
2394         public static function getAutosummary( $oldtext, $newtext, $flags ) {
2395                 global $wgContLang;
2396
2397                 # Decide what kind of autosummary is needed.
2398
2399                 # Redirect autosummaries
2400                 $ot = Title::newFromRedirect( $oldtext );
2401                 $rt = Title::newFromRedirect( $newtext );
2402
2403                 if ( is_object( $rt ) && ( !is_object( $ot ) || !$rt->equals( $ot ) || $ot->getFragment() != $rt->getFragment() ) ) {
2404                         $truncatedtext = $wgContLang->truncate(
2405                                 str_replace( "\n", ' ', $newtext ),
2406                                 max( 0, 250
2407                                         - strlen( wfMsgForContent( 'autoredircomment' ) )
2408                                         - strlen( $rt->getFullText() )
2409                                 ) );
2410                         return wfMsgForContent( 'autoredircomment', $rt->getFullText(), $truncatedtext );
2411                 }
2412
2413                 # New page autosummaries
2414                 if ( $flags & EDIT_NEW && strlen( $newtext ) ) {
2415                         # If they're making a new article, give its text, truncated, in the summary.
2416
2417                         $truncatedtext = $wgContLang->truncate(
2418                                 str_replace( "\n", ' ', $newtext ),
2419                                 max( 0, 200 - strlen( wfMsgForContent( 'autosumm-new' ) ) ) );
2420
2421                         return wfMsgForContent( 'autosumm-new', $truncatedtext );
2422                 }
2423
2424                 # Blanking autosummaries
2425                 if ( $oldtext != '' && $newtext == '' ) {
2426                         return wfMsgForContent( 'autosumm-blank' );
2427                 } elseif ( strlen( $oldtext ) > 10 * strlen( $newtext ) && strlen( $newtext ) < 500 ) {
2428                         # Removing more than 90% of the article
2429
2430                         $truncatedtext = $wgContLang->truncate(
2431                                 $newtext,
2432                                 max( 0, 200 - strlen( wfMsgForContent( 'autosumm-replace' ) ) ) );
2433
2434                         return wfMsgForContent( 'autosumm-replace', $truncatedtext );
2435                 }
2436
2437                 # If we reach this point, there's no applicable autosummary for our case, so our
2438                 # autosummary is empty.
2439                 return '';
2440         }
2441
2442         /**
2443          * Auto-generates a deletion reason
2444          *
2445          * @param &$hasHistory Boolean: whether the page has a history
2446          * @return mixed String containing deletion reason or empty string, or boolean false
2447          *    if no revision occurred
2448          */
2449         public function getAutoDeleteReason( &$hasHistory ) {
2450                 global $wgContLang;
2451
2452                 $dbw = wfGetDB( DB_MASTER );
2453                 // Get the last revision
2454                 $rev = Revision::newFromTitle( $this->getTitle() );
2455
2456                 if ( is_null( $rev ) ) {
2457                         return false;
2458                 }
2459
2460                 // Get the article's contents
2461                 $contents = $rev->getText();
2462                 $blank = false;
2463
2464                 // If the page is blank, use the text from the previous revision,
2465                 // which can only be blank if there's a move/import/protect dummy revision involved
2466                 if ( $contents == '' ) {
2467                         $prev = $rev->getPrevious();
2468
2469                         if ( $prev )    {
2470                                 $contents = $prev->getText();
2471                                 $blank = true;
2472                         }
2473                 }
2474
2475                 // Find out if there was only one contributor
2476                 // Only scan the last 20 revisions
2477                 $res = $dbw->select( 'revision', 'rev_user_text',
2478                         array( 'rev_page' => $this->getID(), $dbw->bitAnd( 'rev_deleted', Revision::DELETED_USER ) . ' = 0' ),
2479                         __METHOD__,
2480                         array( 'LIMIT' => 20 )
2481                 );
2482
2483                 if ( $res === false ) {
2484                         // This page has no revisions, which is very weird
2485                         return false;
2486                 }
2487
2488                 $hasHistory = ( $res->numRows() > 1 );
2489                 $row = $dbw->fetchObject( $res );
2490
2491                 if ( $row ) { // $row is false if the only contributor is hidden
2492                         $onlyAuthor = $row->rev_user_text;
2493                         // Try to find a second contributor
2494                         foreach ( $res as $row ) {
2495                                 if ( $row->rev_user_text != $onlyAuthor ) { // Bug 22999
2496                                         $onlyAuthor = false;
2497                                         break;
2498                                 }
2499                         }
2500                 } else {
2501                         $onlyAuthor = false;
2502                 }
2503
2504                 // Generate the summary with a '$1' placeholder
2505                 if ( $blank ) {
2506                         // The current revision is blank and the one before is also
2507                         // blank. It's just not our lucky day
2508                         $reason = wfMsgForContent( 'exbeforeblank', '$1' );
2509                 } else {
2510                         if ( $onlyAuthor ) {
2511                                 $reason = wfMsgForContent( 'excontentauthor', '$1', $onlyAuthor );
2512                         } else {
2513                                 $reason = wfMsgForContent( 'excontent', '$1' );
2514                         }
2515                 }
2516
2517                 if ( $reason == '-' ) {
2518                         // Allow these UI messages to be blanked out cleanly
2519                         return '';
2520                 }
2521
2522                 // Replace newlines with spaces to prevent uglyness
2523                 $contents = preg_replace( "/[\n\r]/", ' ', $contents );
2524                 // Calculate the maximum amount of chars to get
2525                 // Max content length = max comment length - length of the comment (excl. $1)
2526                 $maxLength = 255 - ( strlen( $reason ) - 2 );
2527                 $contents = $wgContLang->truncate( $contents, $maxLength );
2528                 // Remove possible unfinished links
2529                 $contents = preg_replace( '/\[\[([^\]]*)\]?$/', '$1', $contents );
2530                 // Now replace the '$1' placeholder
2531                 $reason = str_replace( '$1', $contents, $reason );
2532
2533                 return $reason;
2534         }
2535
2536         /**
2537          * Update all the appropriate counts in the category table, given that
2538          * we've added the categories $added and deleted the categories $deleted.
2539          *
2540          * @param $added array   The names of categories that were added
2541          * @param $deleted array The names of categories that were deleted
2542          */
2543         public function updateCategoryCounts( $added, $deleted ) {
2544                 $ns = $this->mTitle->getNamespace();
2545                 $dbw = wfGetDB( DB_MASTER );
2546
2547                 # First make sure the rows exist.  If one of the "deleted" ones didn't
2548                 # exist, we might legitimately not create it, but it's simpler to just
2549                 # create it and then give it a negative value, since the value is bogus
2550                 # anyway.
2551                 #
2552                 # Sometimes I wish we had INSERT ... ON DUPLICATE KEY UPDATE.
2553                 $insertCats = array_merge( $added, $deleted );
2554                 if ( !$insertCats ) {
2555                         # Okay, nothing to do
2556                         return;
2557                 }
2558
2559                 $insertRows = array();
2560
2561                 foreach ( $insertCats as $cat ) {
2562                         $insertRows[] = array(
2563                                 'cat_id' => $dbw->nextSequenceValue( 'category_cat_id_seq' ),
2564                                 'cat_title' => $cat
2565                         );
2566                 }
2567                 $dbw->insert( 'category', $insertRows, __METHOD__, 'IGNORE' );
2568
2569                 $addFields    = array( 'cat_pages = cat_pages + 1' );
2570                 $removeFields = array( 'cat_pages = cat_pages - 1' );
2571
2572                 if ( $ns == NS_CATEGORY ) {
2573                         $addFields[]    = 'cat_subcats = cat_subcats + 1';
2574                         $removeFields[] = 'cat_subcats = cat_subcats - 1';
2575                 } elseif ( $ns == NS_FILE ) {
2576                         $addFields[]    = 'cat_files = cat_files + 1';
2577                         $removeFields[] = 'cat_files = cat_files - 1';
2578                 }
2579
2580                 if ( $added ) {
2581                         $dbw->update(
2582                                 'category',
2583                                 $addFields,
2584                                 array( 'cat_title' => $added ),
2585                                 __METHOD__
2586                         );
2587                 }
2588
2589                 if ( $deleted ) {
2590                         $dbw->update(
2591                                 'category',
2592                                 $removeFields,
2593                                 array( 'cat_title' => $deleted ),
2594                                 __METHOD__
2595                         );
2596                 }
2597         }
2598
2599         /**
2600          * Updates cascading protections
2601          *
2602          * @param $parserOutput ParserOutput object for the current version
2603          */
2604         public function doCascadeProtectionUpdates( ParserOutput $parserOutput ) {
2605                 if ( wfReadOnly() || !$this->mTitle->areRestrictionsCascading() ) {
2606                         return;
2607                 }
2608
2609                 // templatelinks table may have become out of sync,
2610                 // especially if using variable-based transclusions.
2611                 // For paranoia, check if things have changed and if
2612                 // so apply updates to the database. This will ensure
2613                 // that cascaded protections apply as soon as the changes
2614                 // are visible.
2615
2616                 # Get templates from templatelinks
2617                 $id = $this->mTitle->getArticleID();
2618
2619                 $tlTemplates = array();
2620
2621                 $dbr = wfGetDB( DB_SLAVE );
2622                 $res = $dbr->select( array( 'templatelinks' ),
2623                         array( 'tl_namespace', 'tl_title' ),
2624                         array( 'tl_from' => $id ),
2625                         __METHOD__
2626                 );
2627
2628                 foreach ( $res as $row ) {
2629                         $tlTemplates["{$row->tl_namespace}:{$row->tl_title}"] = true;
2630                 }
2631
2632                 # Get templates from parser output.
2633                 $poTemplates = array();
2634                 foreach ( $parserOutput->getTemplates() as $ns => $templates ) {
2635                         foreach ( $templates as $dbk => $id ) {
2636                                 $poTemplates["$ns:$dbk"] = true;
2637                         }
2638                 }
2639
2640                 # Get the diff
2641                 $templates_diff = array_diff_key( $poTemplates, $tlTemplates );
2642
2643                 if ( count( $templates_diff ) > 0 ) {
2644                         # Whee, link updates time.
2645                         $u = new LinksUpdate( $this->mTitle, $parserOutput, false );
2646                         $u->doUpdate();
2647                 }
2648         }
2649
2650         /**
2651          * Return a list of templates used by this article.
2652          * Uses the templatelinks table
2653          *
2654          * @deprecated in 1.19; use Title::getTemplateLinksFrom()
2655          * @return Array of Title objects
2656          */
2657         public function getUsedTemplates() {
2658                 return $this->mTitle->getTemplateLinksFrom();
2659         }
2660
2661         /**
2662          * Perform article updates on a special page creation.
2663          *
2664          * @param $rev Revision object
2665          *
2666          * @todo This is a shitty interface function. Kill it and replace the
2667          * other shitty functions like doEditUpdates and such so it's not needed
2668          * anymore.
2669          * @deprecated since 1.18, use doEditUpdates()
2670          */
2671         public function createUpdates( $rev ) {
2672                 wfDeprecated( __METHOD__, '1.18' );
2673                 global $wgUser;
2674                 $this->doEditUpdates( $rev, $wgUser, array( 'created' => true ) );
2675         }
2676
2677         /**
2678          * This function is called right before saving the wikitext,
2679          * so we can do things like signatures and links-in-context.
2680          *
2681          * @deprecated in 1.19; use Parser::preSaveTransform() instead
2682          * @param $text String article contents
2683          * @param $user User object: user doing the edit
2684          * @param $popts ParserOptions object: parser options, default options for
2685          *               the user loaded if null given
2686          * @return string article contents with altered wikitext markup (signatures
2687          *      converted, {{subst:}}, templates, etc.)
2688          */
2689         public function preSaveTransform( $text, User $user = null, ParserOptions $popts = null ) {
2690                 global $wgParser, $wgUser;
2691
2692                 wfDeprecated( __METHOD__, '1.19' );
2693
2694                 $user = is_null( $user ) ? $wgUser : $user;
2695
2696                 if ( $popts === null ) {
2697                         $popts = ParserOptions::newFromUser( $user );
2698                 }
2699
2700                 return $wgParser->preSaveTransform( $text, $this->mTitle, $user, $popts );
2701         }
2702
2703         /**
2704          * Check whether the number of revisions of this page surpasses $wgDeleteRevisionsLimit
2705          *
2706          * @deprecated in 1.19; use Title::isBigDeletion() instead.
2707          * @return bool
2708          */
2709         public function isBigDeletion() {
2710                 wfDeprecated( __METHOD__, '1.19' );
2711                 return $this->mTitle->isBigDeletion();
2712         }
2713
2714         /**
2715          * Get the  approximate revision count of this page.
2716          *
2717          * @deprecated in 1.19; use Title::estimateRevisionCount() instead.
2718          * @return int
2719          */
2720         public function estimateRevisionCount() {
2721                 wfDeprecated( __METHOD__, '1.19' );
2722                 return $this->mTitle->estimateRevisionCount();
2723         }
2724
2725         /**
2726          * Update the article's restriction field, and leave a log entry.
2727          *
2728          * @deprecated since 1.19
2729          * @param $limit Array: set of restriction keys
2730          * @param $reason String
2731          * @param &$cascade Integer. Set to false if cascading protection isn't allowed.
2732          * @param $expiry Array: per restriction type expiration
2733          * @param $user User The user updating the restrictions
2734          * @return bool true on success
2735          */
2736         public function updateRestrictions(
2737                 $limit = array(), $reason = '', &$cascade = 0, $expiry = array(), User $user = null
2738         ) {
2739                 global $wgUser;
2740
2741                 $user = is_null( $user ) ? $wgUser : $user;
2742
2743                 return $this->doUpdateRestrictions( $limit, $expiry, $cascade, $reason, $user )->isOK();
2744         }
2745
2746         /**
2747          * @deprecated since 1.18
2748          */
2749         public function quickEdit( $text, $comment = '', $minor = 0 ) {
2750                 wfDeprecated( __METHOD__, '1.18' );
2751                 global $wgUser;
2752                 return $this->doQuickEdit( $text, $wgUser, $comment, $minor );
2753         }
2754
2755         /**
2756          * @deprecated since 1.18
2757          */
2758         public function viewUpdates() {
2759                 wfDeprecated( __METHOD__, '1.18' );
2760                 global $wgUser;
2761                 return $this->doViewUpdates( $wgUser );
2762         }
2763
2764         /**
2765          * @deprecated since 1.18
2766          */
2767         public function useParserCache( $oldid ) {
2768                 wfDeprecated( __METHOD__, '1.18' );
2769                 global $wgUser;
2770                 return $this->isParserCacheUsed( ParserOptions::newFromUser( $wgUser ), $oldid );
2771         }
2772 }
2773
2774 class PoolWorkArticleView extends PoolCounterWork {
2775
2776         /**
2777          * @var Page
2778          */
2779         private $page;
2780
2781         /**
2782          * @var string
2783          */
2784         private $cacheKey;
2785
2786         /**
2787          * @var integer
2788          */
2789         private $revid;
2790
2791         /**
2792          * @var ParserOptions
2793          */
2794         private $parserOptions;
2795
2796         /**
2797          * @var string|null
2798          */
2799         private $text;
2800
2801         /**
2802          * @var ParserOutput|false
2803          */
2804         private $parserOutput = false;
2805
2806         /**
2807          * @var bool
2808          */
2809         private $isDirty = false;
2810
2811         /**
2812          * @var Status|false
2813          */
2814         private $error = false;
2815
2816         /**
2817          * Constructor
2818          *
2819          * @param $page Page
2820          * @param $revid Integer: ID of the revision being parsed
2821          * @param $useParserCache Boolean: whether to use the parser cache
2822          * @param $parserOptions parserOptions to use for the parse operation
2823          * @param $text String: text to parse or null to load it
2824          */
2825         function __construct( Page $page, ParserOptions $parserOptions, $revid, $useParserCache, $text = null ) {
2826                 $this->page = $page;
2827                 $this->revid = $revid;
2828                 $this->cacheable = $useParserCache;
2829                 $this->parserOptions = $parserOptions;
2830                 $this->text = $text;
2831                 $this->cacheKey = ParserCache::singleton()->getKey( $page, $parserOptions );
2832                 parent::__construct( 'ArticleView', $this->cacheKey . ':revid:' . $revid );
2833         }
2834
2835         /**
2836          * Get the ParserOutput from this object, or false in case of failure
2837          *
2838          * @return ParserOutput
2839          */
2840         public function getParserOutput() {
2841                 return $this->parserOutput;
2842         }
2843
2844         /**
2845          * Get whether the ParserOutput is a dirty one (i.e. expired)
2846          *
2847          * @return bool
2848          */
2849         public function getIsDirty() {
2850                 return $this->isDirty;
2851         }
2852
2853         /**
2854          * Get a Status object in case of error or false otherwise
2855          *
2856          * @return Status|false
2857          */
2858         public function getError() {
2859                 return $this->error;
2860         }
2861
2862         /**
2863          * @return bool
2864          */
2865         function doWork() {
2866                 global $wgParser, $wgUseFileCache;
2867
2868                 $isCurrent = $this->revid === $this->page->getLatest();
2869
2870                 if ( $this->text !== null ) {
2871                         $text = $this->text;
2872                 } elseif ( $isCurrent ) {
2873                         $text = $this->page->getRawText();
2874                 } else {
2875                         $rev = Revision::newFromTitle( $this->page->getTitle(), $this->revid );
2876                         if ( $rev === null ) {
2877                                 return false;
2878                         }
2879                         $text = $rev->getText();
2880                 }
2881
2882                 $time = - wfTime();
2883                 $this->parserOutput = $wgParser->parse( $text, $this->page->getTitle(),
2884                         $this->parserOptions, true, true, $this->revid );
2885                 $time += wfTime();
2886
2887                 # Timing hack
2888                 if ( $time > 3 ) {
2889                         wfDebugLog( 'slow-parse', sprintf( "%-5.2f %s", $time,
2890                                 $this->page->getTitle()->getPrefixedDBkey() ) );
2891                 }
2892
2893                 if ( $this->cacheable && $this->parserOutput->isCacheable() ) {
2894                         ParserCache::singleton()->save( $this->parserOutput, $this->page, $this->parserOptions );
2895                 }
2896
2897                 // Make sure file cache is not used on uncacheable content.
2898                 // Output that has magic words in it can still use the parser cache
2899                 // (if enabled), though it will generally expire sooner.
2900                 if ( !$this->parserOutput->isCacheable() || $this->parserOutput->containsOldMagic() ) {
2901                         $wgUseFileCache = false;
2902                 }
2903
2904                 if ( $isCurrent ) {
2905                         $this->page->doCascadeProtectionUpdates( $this->parserOutput );
2906                 }
2907
2908                 return true;
2909         }
2910
2911         /**
2912          * @return bool
2913          */
2914         function getCachedWork() {
2915                 $this->parserOutput = ParserCache::singleton()->get( $this->page, $this->parserOptions );
2916
2917                 if ( $this->parserOutput === false ) {
2918                         wfDebug( __METHOD__ . ": parser cache miss\n" );
2919                         return false;
2920                 } else {
2921                         wfDebug( __METHOD__ . ": parser cache hit\n" );
2922                         return true;
2923                 }
2924         }
2925
2926         /**
2927          * @return bool
2928          */
2929         function fallback() {
2930                 $this->parserOutput = ParserCache::singleton()->getDirty( $this->page, $this->parserOptions );
2931
2932                 if ( $this->parserOutput === false ) {
2933                         wfDebugLog( 'dirty', "dirty missing\n" );
2934                         wfDebug( __METHOD__ . ": no dirty cache\n" );
2935                         return false;
2936                 } else {
2937                         wfDebug( __METHOD__ . ": sending dirty output\n" );
2938                         wfDebugLog( 'dirty', "dirty output {$this->cacheKey}\n" );
2939                         $this->isDirty = true;
2940                         return true;
2941                 }
2942         }
2943
2944         /**
2945          * @param $status Status
2946          */
2947         function error( $status ) {
2948                 $this->error = $status;
2949                 return false;
2950         }
2951 }