includes/Article.php

   1 <?php
   2 /**
   3  * File for articles
   4  * @file
   5  */
   6
   7 /**
   8  * Class representing a MediaWiki article and history.
   9  *
  10  * See design.txt for an overview.
  11  * Note: edit user interface and cache support functions have been
  12  * moved to separate EditPage and HTMLFileCache classes.
  13  *
  14  */
  15 class Article {
  16         /**@{{
  17          * @private
  18          */
  19         var $mComment = '';               //!<
  20         var $mContent;                    //!<
  21         var $mContentLoaded = false;      //!<
  22         var $mCounter = -1;               //!< Not loaded
  23         var $mCurID = -1;                 //!< Not loaded
  24         var $mDataLoaded = false;         //!<
  25         var $mForUpdate = false;          //!<
  26         var $mGoodAdjustment = 0;         //!<
  27         var $mIsRedirect = false;         //!<
  28         var $mLatest = false;             //!<
  29         var $mMinorEdit;                  //!<
  30         var $mOldId;                      //!<
  31         var $mPreparedEdit = false;       //!< Title object if set
  32         var $mRedirectedFrom = null;      //!< Title object if set
  33         var $mRedirectTarget = null;      //!< Title object if set
  34         var $mRedirectUrl = false;        //!<
  35         var $mRevIdFetched = 0;           //!<
  36         var $mRevision;                   //!<
  37         var $mTimestamp = '';             //!<
  38         var $mTitle;                      //!<
  39         var $mTotalAdjustment = 0;        //!<
  40         var $mTouched = '19700101000000'; //!<
  41         var $mUser = -1;                  //!< Not loaded
  42         var $mUserText = '';              //!<
  43         /**@}}*/
  44
  45         /**
  46          * Constructor and clear the article
  47          * @param $title Reference to a Title object.
  48          * @param $oldId Integer revision ID, null to fetch from request, zero for current
  49          */
  50         public function __construct( Title $title, $oldId = null ) {
  51                 $this->mTitle =& $title;
  52                 $this->mOldId = $oldId;
  53         }
  54
  55         /**
  56          * Constructor from an article article
  57          * @param $id The article ID to load
  58          */
  59         public static function newFromID( $id ) {
  60                 $t = Title::newFromID( $id );
  61                 return $t == null ? null : new Article( $t );
  62         }
  63
  64         /**
  65          * Tell the page view functions that this view was redirected
  66          * from another page on the wiki.
  67          * @param $from Title object.
  68          */
  69         public function setRedirectedFrom( $from ) {
  70                 $this->mRedirectedFrom = $from;
  71         }
  72
  73         /**
  74          * If this page is a redirect, get its target
  75          *
  76          * The target will be fetched from the redirect table if possible.
  77          * If this page doesn't have an entry there, call insertRedirect()
  78          * @return mixed Title object, or null if this page is not a redirect
  79          */
  80         public function getRedirectTarget() {
  81                 if( !$this->mTitle || !$this->mTitle->isRedirect() )
  82                         return null;
  83                 if( !is_null($this->mRedirectTarget) )
  84                         return $this->mRedirectTarget;
  85                 # Query the redirect table
  86                 $dbr = wfGetDB( DB_SLAVE );
  87                 $res = $dbr->select( 'redirect',
  88                         array('rd_namespace', 'rd_title'),
  89                         array('rd_from' => $this->getID()),
  90                         __METHOD__
  91                 );
  92                 if( $row = $dbr->fetchObject($res) ) {
  93                         return $this->mRedirectTarget = Title::makeTitle($row->rd_namespace, $row->rd_title);
  94                 }
  95                 # This page doesn't have an entry in the redirect table
  96                 return $this->mRedirectTarget = $this->insertRedirect();
  97         }
  98
  99         /**
 100          * Insert an entry for this page into the redirect table.
 101          *
 102          * Don't call this function directly unless you know what you're doing.
 103          * @return Title object
 104          */
 105         public function insertRedirect() {
 106                 $retval = Title::newFromRedirect( $this->getContent() );
 107                 if( !$retval ) {
 108                         return null;
 109                 }
 110                 $dbw = wfGetDB( DB_MASTER );
 111                 $dbw->replace( 'redirect', array('rd_from'),
 112                         array(
 113                                 'rd_from' => $this->getID(),
 114                                 'rd_namespace' => $retval->getNamespace(),
 115                                 'rd_title' => $retval->getDBKey()
 116                         ),
 117                         __METHOD__
 118                 );
 119                 return $retval;
 120         }
 121
 122         /**
 123          * Get the Title object this page redirects to
 124          *
 125          * @return mixed false, Title of in-wiki target, or string with URL
 126          */
 127         public function followRedirect() {
 128                 $text = $this->getContent();
 129                 return $this->followRedirectText( $text );
 130         }
 131
 132         /**
 133          * Get the Title object this text redirects to
 134          *
 135          * @return mixed false, Title of in-wiki target, or string with URL
 136          */
 137         public function followRedirectText( $text ) {
 138                 $rt = Title::newFromRedirect( $text );
 139                 # process if title object is valid and not special:userlogout
 140                 if( $rt ) {
 141                         if( $rt->getInterwiki() != '' ) {
 142                                 if( $rt->isLocal() ) {
 143                                         // Offsite wikis need an HTTP redirect.
 144                                         //
 145                                         // This can be hard to reverse and may produce loops,
 146                                         // so they may be disabled in the site configuration.
 147                                         $source = $this->mTitle->getFullURL( 'redirect=no' );
 148                                         return $rt->getFullURL( 'rdfrom=' . urlencode( $source ) );
 149                                 }
 150                         } else {
 151                                 if( $rt->getNamespace() == NS_SPECIAL ) {
 152                                         // Gotta handle redirects to special pages differently:
 153                                         // Fill the HTTP response "Location" header and ignore
 154                                         // the rest of the page we're on.
 155                                         //
 156                                         // This can be hard to reverse, so they may be disabled.
 157                                         if( $rt->isSpecial( 'Userlogout' ) ) {
 158                                                 // rolleyes
 159                                         } else {
 160                                                 return $rt->getFullURL();
 161                                         }
 162                                 }
 163                                 return $rt;
 164                         }
 165                 }
 166                 // No or invalid redirect
 167                 return false;
 168         }
 169
 170         /**
 171          * get the title object of the article
 172          */
 173         public function getTitle() {
 174                 return $this->mTitle;
 175         }
 176
 177         /**
 178          * Clear the object
 179          * @private
 180          */
 181         public function clear() {
 182                 $this->mDataLoaded    = false;
 183                 $this->mContentLoaded = false;
 184
 185                 $this->mCurID = $this->mUser = $this->mCounter = -1; # Not loaded
 186                 $this->mRedirectedFrom = null; # Title object if set
 187                 $this->mRedirectTarget = null; # Title object if set
 188                 $this->mUserText =
 189                 $this->mTimestamp = $this->mComment = '';
 190                 $this->mGoodAdjustment = $this->mTotalAdjustment = 0;
 191                 $this->mTouched = '19700101000000';
 192                 $this->mForUpdate = false;
 193                 $this->mIsRedirect = false;
 194                 $this->mRevIdFetched = 0;
 195                 $this->mRedirectUrl = false;
 196                 $this->mLatest = false;
 197                 $this->mPreparedEdit = false;
 198         }
 199
 200         /**
 201          * Note that getContent/loadContent do not follow redirects anymore.
 202          * If you need to fetch redirectable content easily, try
 203          * the shortcut in Article::followContent()
 204          *
 205          * @return Return the text of this revision
 206         */
 207         public function getContent() {
 208                 global $wgUser, $wgContLang, $wgOut, $wgMessageCache;
 209                 wfProfileIn( __METHOD__ );
 210                 if( $this->getID() === 0 ) {
 211                         # If this is a MediaWiki:x message, then load the messages
 212                         # and return the message value for x.
 213                         if( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
 214                                 # If this is a system message, get the default text.
 215                                 list( $message, $lang ) = $wgMessageCache->figureMessage( $wgContLang->lcfirst( $this->mTitle->getText() ) );
 216                                 $wgMessageCache->loadAllMessages( $lang );
 217                                 $text = wfMsgGetKey( $message, false, $lang, false );
 218                                 if( wfEmptyMsg( $message, $text ) )
 219                                         $text = '';
 220                         } else {
 221                                 $text = wfMsgExt( $wgUser->isLoggedIn() ? 'noarticletext' : 'noarticletextanon', 'parsemag' );
 222                         }
 223                         wfProfileOut( __METHOD__ );
 224                         return $text;
 225                 } else {
 226                         $this->loadContent();
 227                         wfProfileOut( __METHOD__ );
 228                         return $this->mContent;
 229                 }
 230         }
 231
 232         /**
 233          * Get the text of the current revision. No side-effects...
 234          *
 235          * @return Return the text of the current revision
 236         */
 237         public function getRawText() {
 238                 // Check process cache for current revision
 239                 if( $this->mContentLoaded && $this->mOldId == 0 ) {
 240                         return $this->mContent;
 241                 }
 242                 $rev = Revision::newFromTitle( $this->mTitle );
 243                 $text = $rev ? $rev->getRawText() : false;
 244                 return $text;
 245         }
 246
 247         /**
 248          * This function returns the text of a section, specified by a number ($section).
 249          * A section is text under a heading like == Heading == or \<h1\>Heading\</h1\>, or
 250          * the first section before any such heading (section 0).
 251          *
 252          * If a section contains subsections, these are also returned.
 253          *
 254          * @param $text String: text to look in
 255          * @param $section Integer: section number
 256          * @return string text of the requested section
 257          * @deprecated
 258          */
 259         public function getSection( $text, $section ) {
 260                 global $wgParser;
 261                 return $wgParser->getSection( $text, $section );
 262         }
 263
 264         /**
 265          * @return int The oldid of the article that is to be shown, 0 for the
 266          *             current revision
 267          */
 268         public function getOldID() {
 269                 if( is_null( $this->mOldId ) ) {
 270                         $this->mOldId = $this->getOldIDFromRequest();
 271                 }
 272                 return $this->mOldId;
 273         }
 274
 275         /**
 276          * Sets $this->mRedirectUrl to a correct URL if the query parameters are incorrect
 277          *
 278          * @return int The old id for the request
 279          */
 280         public function getOldIDFromRequest() {
 281                 global $wgRequest;
 282                 $this->mRedirectUrl = false;
 283                 $oldid = $wgRequest->getVal( 'oldid' );
 284                 if( isset( $oldid ) ) {
 285                         $oldid = intval( $oldid );
 286                         if( $wgRequest->getVal( 'direction' ) == 'next' ) {
 287                                 $nextid = $this->mTitle->getNextRevisionID( $oldid );
 288                                 if( $nextid  ) {
 289                                         $oldid = $nextid;
 290                                 } else {
 291                                         $this->mRedirectUrl = $this->mTitle->getFullURL( 'redirect=no' );
 292                                 }
 293                         } elseif( $wgRequest->getVal( 'direction' ) == 'prev' ) {
 294                                 $previd = $this->mTitle->getPreviousRevisionID( $oldid );
 295                                 if( $previd ) {
 296                                         $oldid = $previd;
 297                                 }
 298                         }
 299                 }
 300                 if( !$oldid ) {
 301                         $oldid = 0;
 302                 }
 303                 return $oldid;
 304         }
 305
 306         /**
 307          * Load the revision (including text) into this object
 308          */
 309         function loadContent() {
 310                 if( $this->mContentLoaded ) return;
 311                 wfProfileIn( __METHOD__ );
 312                 # Query variables :P
 313                 $oldid = $this->getOldID();
 314                 # Pre-fill content with error message so that if something
 315                 # fails we'll have something telling us what we intended.
 316                 $this->mOldId = $oldid;
 317                 $this->fetchContent( $oldid );
 318                 wfProfileOut( __METHOD__ );
 319         }
 320
 321
 322         /**
 323          * Fetch a page record with the given conditions
 324          * @param $dbr Database object
 325          * @param $conditions Array
 326          */
 327         protected function pageData( $dbr, $conditions ) {
 328                 $fields = array(
 329                                 'page_id',
 330                                 'page_namespace',
 331                                 'page_title',
 332                                 'page_restrictions',
 333                                 'page_counter',
 334                                 'page_is_redirect',
 335                                 'page_is_new',
 336                                 'page_random',
 337                                 'page_touched',
 338                                 'page_latest',
 339                                 'page_len',
 340                 );
 341                 wfRunHooks( 'ArticlePageDataBefore', array( &$this, &$fields ) );
 342                 $row = $dbr->selectRow(
 343                         'page',
 344                         $fields,
 345                         $conditions,
 346                         __METHOD__
 347                 );
 348                 wfRunHooks( 'ArticlePageDataAfter', array( &$this, &$row ) );
 349                 return $row ;
 350         }
 351
 352         /**
 353          * @param $dbr Database object
 354          * @param $title Title object
 355          */
 356         public function pageDataFromTitle( $dbr, $title ) {
 357                 return $this->pageData( $dbr, array(
 358                         'page_namespace' => $title->getNamespace(),
 359                         'page_title'     => $title->getDBkey() ) );
 360         }
 361
 362         /**
 363          * @param $dbr Database
 364          * @param $id Integer
 365          */
 366         protected function pageDataFromId( $dbr, $id ) {
 367                 return $this->pageData( $dbr, array( 'page_id' => $id ) );
 368         }
 369
 370         /**
 371          * Set the general counter, title etc data loaded from
 372          * some source.
 373          *
 374          * @param $data Database row object or "fromdb"
 375          */
 376         public function loadPageData( $data = 'fromdb' ) {
 377                 if( $data === 'fromdb' ) {
 378                         $dbr = wfGetDB( DB_MASTER );
 379                         $data = $this->pageDataFromId( $dbr, $this->getId() );
 380                 }
 381
 382                 $lc = LinkCache::singleton();
 383                 if( $data ) {
 384                         $lc->addGoodLinkObj( $data->page_id, $this->mTitle, $data->page_len, $data->page_is_redirect );
 385
 386                         $this->mTitle->mArticleID = $data->page_id;
 387
 388                         # Old-fashioned restrictions
 389                         $this->mTitle->loadRestrictions( $data->page_restrictions );
 390
 391                         $this->mCounter     = $data->page_counter;
 392                         $this->mTouched     = wfTimestamp( TS_MW, $data->page_touched );
 393                         $this->mIsRedirect  = $data->page_is_redirect;
 394                         $this->mLatest      = $data->page_latest;
 395                 } else {
 396                         if( is_object( $this->mTitle ) ) {
 397                                 $lc->addBadLinkObj( $this->mTitle );
 398                         }
 399                         $this->mTitle->mArticleID = 0;
 400                 }
 401
 402                 $this->mDataLoaded  = true;
 403         }
 404
 405         /**
 406          * Get text of an article from database
 407          * Does *NOT* follow redirects.
 408          * @param $oldid Int: 0 for whatever the latest revision is
 409          * @return string
 410          */
 411         function fetchContent( $oldid = 0 ) {
 412                 if( $this->mContentLoaded ) {
 413                         return $this->mContent;
 414                 }
 415
 416                 $dbr = wfGetDB( DB_MASTER );
 417
 418                 # Pre-fill content with error message so that if something
 419                 # fails we'll have something telling us what we intended.
 420                 $t = $this->mTitle->getPrefixedText();
 421                 $d = $oldid ? wfMsgExt( 'missingarticle-rev', array( 'escape' ), $oldid ) : '';
 422                 $this->mContent = wfMsg( 'missing-article', $t, $d ) ;
 423
 424                 if( $oldid ) {
 425                         $revision = Revision::newFromId( $oldid );
 426                         if( is_null( $revision ) ) {
 427                                 wfDebug( __METHOD__." failed to retrieve specified revision, id $oldid\n" );
 428                                 return false;
 429                         }
 430                         $data = $this->pageDataFromId( $dbr, $revision->getPage() );
 431                         if( !$data ) {
 432                                 wfDebug( __METHOD__." failed to get page data linked to revision id $oldid\n" );
 433                                 return false;
 434                         }
 435                         $this->mTitle = Title::makeTitle( $data->page_namespace, $data->page_title );
 436                         $this->loadPageData( $data );
 437                 } else {
 438                         if( !$this->mDataLoaded ) {
 439                                 $data = $this->pageDataFromTitle( $dbr, $this->mTitle );
 440                                 if( !$data ) {
 441                                         wfDebug( __METHOD__." failed to find page data for title " . $this->mTitle->getPrefixedText() . "\n" );
 442                                         return false;
 443                                 }
 444                                 $this->loadPageData( $data );
 445                         }
 446                         $revision = Revision::newFromId( $this->mLatest );
 447                         if( is_null( $revision ) ) {
 448                                 wfDebug( __METHOD__." failed to retrieve current page, rev_id {$this->mLatest}\n" );
 449                                 return false;
 450                         }
 451                 }
 452
 453                 // FIXME: Horrible, horrible! This content-loading interface just plain sucks.
 454                 // We should instead work with the Revision object when we need it...
 455                 $this->mContent   = $revision->getText( Revision::FOR_THIS_USER ); // Loads if user is allowed
 456
 457                 $this->mUser      = $revision->getUser();
 458                 $this->mUserText  = $revision->getUserText();
 459                 $this->mComment   = $revision->getComment();
 460                 $this->mTimestamp = wfTimestamp( TS_MW, $revision->getTimestamp() );
 461
 462                 $this->mRevIdFetched = $revision->getId();
 463                 $this->mContentLoaded = true;
 464                 $this->mRevision =& $revision;
 465
 466                 wfRunHooks( 'ArticleAfterFetchContent', array( &$this, &$this->mContent ) ) ;
 467
 468                 return $this->mContent;
 469         }
 470
 471         /**
 472          * Read/write accessor to select FOR UPDATE
 473          *
 474          * @param $x Mixed: FIXME
 475          */
 476         public function forUpdate( $x = NULL ) {
 477                 return wfSetVar( $this->mForUpdate, $x );
 478         }
 479
 480         /**
 481          * Get the database which should be used for reads
 482          *
 483          * @return Database
 484          * @deprecated - just call wfGetDB( DB_MASTER ) instead
 485          */
 486         function getDB() {
 487                 wfDeprecated( __METHOD__ );
 488                 return wfGetDB( DB_MASTER );
 489         }
 490
 491         /**
 492          * Get options for all SELECT statements
 493          *
 494          * @param $options Array: an optional options array which'll be appended to
 495          *                       the default
 496          * @return Array: options
 497          */
 498         protected function getSelectOptions( $options = '' ) {
 499                 if( $this->mForUpdate ) {
 500                         if( is_array( $options ) ) {
 501                                 $options[] = 'FOR UPDATE';
 502                         } else {
 503                                 $options = 'FOR UPDATE';
 504                         }
 505                 }
 506                 return $options;
 507         }
 508
 509         /**
 510          * @return int Page ID
 511          */
 512         public function getID() {
 513                 if( $this->mTitle ) {
 514                         return $this->mTitle->getArticleID();
 515                 } else {
 516                         return 0;
 517                 }
 518         }
 519
 520         /**
 521          * @return bool Whether or not the page exists in the database
 522          */
 523         public function exists() {
 524                 return $this->getId() > 0;
 525         }
 526
 527         /**
 528          * Check if this page is something we're going to be showing
 529          * some sort of sensible content for. If we return false, page
 530          * views (plain action=view) will return an HTTP 404 response,
 531          * so spiders and robots can know they're following a bad link.
 532          *
 533          * @return bool
 534          */
 535         public function hasViewableContent() {
 536                 return $this->exists() || $this->mTitle->isAlwaysKnown();
 537         }
 538
 539         /**
 540          * @return int The view count for the page
 541          */
 542         public function getCount() {
 543                 if( -1 == $this->mCounter ) {
 544                         $id = $this->getID();
 545                         if( $id == 0 ) {
 546                                 $this->mCounter = 0;
 547                         } else {
 548                                 $dbr = wfGetDB( DB_SLAVE );
 549                                 $this->mCounter = $dbr->selectField( 'page',
 550                                         'page_counter',
 551                                         array( 'page_id' => $id ),
 552                                         __METHOD__,
 553                                         $this->getSelectOptions()
 554                                 );
 555                         }
 556                 }
 557                 return $this->mCounter;
 558         }
 559
 560         /**
 561          * Determine whether a page  would be suitable for being counted as an
 562          * article in the site_stats table based on the title & its content
 563          *
 564          * @param $text String: text to analyze
 565          * @return bool
 566          */
 567         public function isCountable( $text ) {
 568                 global $wgUseCommaCount;
 569
 570                 $token = $wgUseCommaCount ? ',' : '[[';
 571                 return $this->mTitle->isContentPage() && !$this->isRedirect($text) && in_string($token,$text);
 572         }
 573
 574         /**
 575          * Tests if the article text represents a redirect
 576          *
 577          * @param $text String: FIXME
 578          * @return bool
 579          */
 580         public function isRedirect( $text = false ) {
 581                 if( $text === false ) {
 582                         if( $this->mDataLoaded ) {
 583                                 return $this->mIsRedirect;
 584                         }
 585                         // Apparently loadPageData was never called
 586                         $this->loadContent();
 587                         $titleObj = Title::newFromRedirect( $this->fetchContent() );
 588                 } else {
 589                         $titleObj = Title::newFromRedirect( $text );
 590                 }
 591                 return $titleObj !== NULL;
 592         }
 593
 594         /**
 595          * Returns true if the currently-referenced revision is the current edit
 596          * to this page (and it exists).
 597          * @return bool
 598          */
 599         public function isCurrent() {
 600                 # If no oldid, this is the current version.
 601                 if( $this->getOldID() == 0 ) {
 602                         return true;
 603                 }
 604                 return $this->exists() && isset($this->mRevision) && $this->mRevision->isCurrent();
 605         }
 606
 607         /**
 608          * Loads everything except the text
 609          * This isn't necessary for all uses, so it's only done if needed.
 610          */
 611         protected function loadLastEdit() {
 612                 if( -1 != $this->mUser )
 613                         return;
 614
 615                 # New or non-existent articles have no user information
 616                 $id = $this->getID();
 617                 if( 0 == $id ) return;
 618
 619                 $this->mLastRevision = Revision::loadFromPageId( wfGetDB( DB_MASTER ), $id );
 620                 if( !is_null( $this->mLastRevision ) ) {
 621                         $this->mUser      = $this->mLastRevision->getUser();
 622                         $this->mUserText  = $this->mLastRevision->getUserText();
 623                         $this->mTimestamp = $this->mLastRevision->getTimestamp();
 624                         $this->mComment   = $this->mLastRevision->getComment();
 625                         $this->mMinorEdit = $this->mLastRevision->isMinor();
 626                         $this->mRevIdFetched = $this->mLastRevision->getId();
 627                 }
 628         }
 629
 630         public function getTimestamp() {
 631                 // Check if the field has been filled by ParserCache::get()
 632                 if( !$this->mTimestamp ) {
 633                         $this->loadLastEdit();
 634                 }
 635                 return wfTimestamp(TS_MW, $this->mTimestamp);
 636         }
 637
 638         public function getUser() {
 639                 $this->loadLastEdit();
 640                 return $this->mUser;
 641         }
 642
 643         public function getUserText() {
 644                 $this->loadLastEdit();
 645                 return $this->mUserText;
 646         }
 647
 648         public function getComment() {
 649                 $this->loadLastEdit();
 650                 return $this->mComment;
 651         }
 652
 653         public function getMinorEdit() {
 654                 $this->loadLastEdit();
 655                 return $this->mMinorEdit;
 656         }
 657
 658         /* Use this to fetch the rev ID used on page views */
 659         public function getRevIdFetched() {
 660                 $this->loadLastEdit();
 661                 return $this->mRevIdFetched;
 662         }
 663
 664         /**
 665          * @param $limit Integer: default 0.
 666          * @param $offset Integer: default 0.
 667          */
 668         public function getContributors($limit = 0, $offset = 0) {
 669                 # XXX: this is expensive; cache this info somewhere.
 670
 671                 $contribs = array();
 672                 $dbr = wfGetDB( DB_SLAVE );
 673                 $revTable = $dbr->tableName( 'revision' );
 674                 $userTable = $dbr->tableName( 'user' );
 675                 $user = $this->getUser();
 676                 $pageId = $this->getId();
 677
 678                 $sql = "SELECT {$userTable}.*, MAX(rev_timestamp) as timestamp
 679                         FROM $revTable LEFT JOIN $userTable ON rev_user = user_id
 680                         WHERE rev_page = $pageId
 681                         AND rev_user != $user
 682                         GROUP BY rev_user, rev_user_text, user_real_name
 683                         ORDER BY timestamp DESC";
 684
 685                 if($limit > 0) { $sql .= ' LIMIT '.$limit; }
 686                 if($offset > 0) { $sql .= ' OFFSET '.$offset; }
 687
 688                 $sql .= ' '. $this->getSelectOptions();
 689
 690                 $res = $dbr->query($sql, __METHOD__ );
 691
 692                 return new UserArrayFromResult( $res );
 693         }
 694
 695         /**
 696          * This is the default action of the script: just view the page of
 697          * the given title.
 698         */
 699         public function view() {
 700                 global $wgUser, $wgOut, $wgRequest, $wgContLang;
 701                 global $wgEnableParserCache, $wgStylePath, $wgParser;
 702                 global $wgUseTrackbacks, $wgNamespaceRobotPolicies, $wgArticleRobotPolicies;
 703                 global $wgDefaultRobotPolicy;
 704
 705                 wfProfileIn( __METHOD__ );
 706
 707                 # Get variables from query string
 708                 $oldid = $this->getOldID();
 709
 710                 # Try file cache
 711                 if( $oldid === 0 && $this->checkTouched() ) {
 712                         global $wgUseETag;
 713                         if( $wgUseETag ) {
 714                                 $parserCache = ParserCache::singleton();
 715                                 $wgOut->setETag( $parserCache->getETag($this,$wgUser) );
 716                         }
 717                         if( $wgOut->checkLastModified( $this->getTouched() ) ) {
 718                                 wfProfileOut( __METHOD__ );
 719                                 return;
 720                         } else if( $this->tryFileCache() ) {
 721                                 # tell wgOut that output is taken care of
 722                                 $wgOut->disable();
 723                                 $this->viewUpdates();
 724                                 wfProfileOut( __METHOD__ );
 725                                 return;
 726                         }
 727                 }
 728
 729                 $ns = $this->mTitle->getNamespace(); # shortcut
 730                 $sk = $wgUser->getSkin();
 731
 732                 # getOldID may want us to redirect somewhere else
 733                 if( $this->mRedirectUrl ) {
 734                         $wgOut->redirect( $this->mRedirectUrl );
 735                         wfProfileOut( __METHOD__ );
 736                         return;
 737                 }
 738
 739                 $diff = $wgRequest->getVal( 'diff' );
 740                 $rcid = $wgRequest->getVal( 'rcid' );
 741                 $rdfrom = $wgRequest->getVal( 'rdfrom' );
 742                 $diffOnly = $wgRequest->getBool( 'diffonly', $wgUser->getOption( 'diffonly' ) );
 743                 $purge = $wgRequest->getVal( 'action' ) == 'purge';
 744                 $return404 = false;
 745
 746                 $wgOut->setArticleFlag( true );
 747
 748                 # Discourage indexing of printable versions, but encourage following
 749                 if( $wgOut->isPrintable() ) {
 750                         $policy = 'noindex,follow';
 751                 } elseif( isset( $wgArticleRobotPolicies[$this->mTitle->getPrefixedText()] ) ) {
 752                         $policy = $wgArticleRobotPolicies[$this->mTitle->getPrefixedText()];
 753                 } elseif( isset( $wgNamespaceRobotPolicies[$ns] ) ) {
 754                         # Honour customised robot policies for this namespace
 755                         $policy = $wgNamespaceRobotPolicies[$ns];
 756                 } else {
 757                         $policy = $wgDefaultRobotPolicy;
 758                 }
 759                 $wgOut->setRobotPolicy( $policy );
 760
 761                 # If we got diff and oldid in the query, we want to see a
 762                 # diff page instead of the article.
 763
 764                 if( !is_null( $diff ) ) {
 765                         $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
 766
 767                         $diff = $wgRequest->getVal( 'diff' );
 768                         $htmldiff = $wgRequest->getVal( 'htmldiff' , false);
 769                         $de = new DifferenceEngine( $this->mTitle, $oldid, $diff, $rcid, $purge, $htmldiff);
 770                         // DifferenceEngine directly fetched the revision:
 771                         $this->mRevIdFetched = $de->mNewid;
 772                         $de->showDiffPage( $diffOnly );
 773
 774                         // Needed to get the page's current revision
 775                         $this->loadPageData();
 776                         if( $diff == 0 || $diff == $this->mLatest ) {
 777                                 # Run view updates for current revision only
 778                                 $this->viewUpdates();
 779                         }
 780                         wfProfileOut( __METHOD__ );
 781                         return;
 782                 }
 783
 784                 if( $ns == NS_USER || $ns == NS_USER_TALK ) {
 785                         # User/User_talk subpages are not modified. (bug 11443)
 786                         if( !$this->mTitle->isSubpage() ) {
 787                                 $block = new Block();
 788                                 if( $block->load( $this->mTitle->getBaseText() ) ) {
 789                                         $wgOut->setRobotpolicy( 'noindex,nofollow' );
 790                                 }
 791                         }
 792                 }
 793
 794                 # Should the parser cache be used?
 795                 $pcache = $this->useParserCache( $oldid );
 796                 wfDebug( 'Article::view using parser cache: ' . ($pcache ? 'yes' : 'no' ) . "\n" );
 797                 if( $wgUser->getOption( 'stubthreshold' ) ) {
 798                         wfIncrStats( 'pcache_miss_stub' );
 799                 }
 800
 801                 $wasRedirected = false;
 802                 if( isset( $this->mRedirectedFrom ) ) {
 803                         // This is an internally redirected page view.
 804                         // We'll need a backlink to the source page for navigation.
 805                         if( wfRunHooks( 'ArticleViewRedirect', array( &$this ) ) ) {
 806                                 $redir = $sk->makeKnownLinkObj( $this->mRedirectedFrom, '', 'redirect=no' );
 807                                 $s = wfMsgExt( 'redirectedfrom', array( 'parseinline', 'replaceafter' ), $redir );
 808                                 $wgOut->setSubtitle( $s );
 809
 810                                 // Set the fragment if one was specified in the redirect
 811                                 if( strval( $this->mTitle->getFragment() ) != '' ) {
 812                                         $fragment = Xml::escapeJsString( $this->mTitle->getFragmentForURL() );
 813                                         $wgOut->addInlineScript( "redirectToFragment(\"$fragment\");" );
 814                                 }
 815                                 $wasRedirected = true;
 816                         }
 817                 } elseif( !empty( $rdfrom ) ) {
 818                         // This is an externally redirected view, from some other wiki.
 819                         // If it was reported from a trusted site, supply a backlink.
 820                         global $wgRedirectSources;
 821                         if( $wgRedirectSources && preg_match( $wgRedirectSources, $rdfrom ) ) {
 822                                 $redir = $sk->makeExternalLink( $rdfrom, $rdfrom );
 823                                 $s = wfMsgExt( 'redirectedfrom', array( 'parseinline', 'replaceafter' ), $redir );
 824                                 $wgOut->setSubtitle( $s );
 825                                 $wasRedirected = true;
 826                         }
 827                 }
 828
 829                 $outputDone = false;
 830                 wfRunHooks( 'ArticleViewHeader', array( &$this, &$outputDone, &$pcache ) );
 831                 if( $pcache && $wgOut->tryParserCache( $this, $wgUser ) ) {
 832                         // Ensure that UI elements requiring revision ID have
 833                         // the correct version information.
 834                         $wgOut->setRevisionId( $this->mLatest );
 835                         $outputDone = true;
 836                 }
 837                 # Fetch content and check for errors
 838                 if( !$outputDone ) {
 839                         # If the article does not exist and was deleted, show the log
 840                         if( $this->getID() == 0 ) {
 841                                 $this->showDeletionLog();
 842                         }
 843                         $text = $this->getContent();
 844                         // For now, check also for ID until getContent actually returns
 845                         // false for pages that do not exists
 846                         if( $text === false || $this->getID() === 0 ) {
 847                                 # Failed to load, replace text with error message
 848                                 $t = $this->mTitle->getPrefixedText();
 849                                 if( $oldid ) {
 850                                         $d = wfMsgExt( 'missingarticle-rev', 'escape', $oldid );
 851                                         $text = wfMsgExt( 'missing-article', 'parsemag', $t, $d );
 852                                 // Always use page content for pages in the MediaWiki namespace
 853                                 // since it contains the default message
 854                                 } elseif ( $this->mTitle->getNamespace() != NS_MEDIAWIKI ) {
 855                                         $text = wfMsgExt( 'noarticletext', 'parsemag' );
 856                                 }
 857                         }
 858
 859                         # Non-existent pages
 860                         if( $this->getID() === 0 ) {
 861                                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
 862                                 $text = "<div class='noarticletext'>\n$text\n</div>";
 863                                 if( !$this->hasViewableContent() ) {
 864                                         // If there's no backing content, send a 404 Not Found
 865                                         // for better machine handling of broken links.
 866                                         $return404 = true;
 867                                 }
 868                         }
 869
 870                         if( $return404 ) {
 871                                 $wgRequest->response()->header( "HTTP/1.x 404 Not Found" );
 872                         }
 873
 874                         # Another whitelist check in case oldid is altering the title
 875                         if( !$this->mTitle->userCanRead() ) {
 876                                 $wgOut->loginToUse();
 877                                 $wgOut->output();
 878                                 $wgOut->disable();
 879                                 wfProfileOut( __METHOD__ );
 880                                 return;
 881                         }
 882
 883                         # For ?curid=x urls, disallow indexing
 884                         if( $wgRequest->getInt('curid') )
 885                                 $wgOut->setRobotPolicy( 'noindex,follow' );
 886
 887                         # We're looking at an old revision
 888                         if( !empty( $oldid ) ) {
 889                                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
 890                                 if( is_null( $this->mRevision ) ) {
 891                                         // FIXME: This would be a nice place to load the 'no such page' text.
 892                                 } else {
 893                                         $this->setOldSubtitle( isset($this->mOldId) ? $this->mOldId : $oldid );
 894                                         if( $this->mRevision->isDeleted( Revision::DELETED_TEXT ) ) {
 895                                                 if( !$this->mRevision->userCan( Revision::DELETED_TEXT ) ) {
 896                                                         $wgOut->addWikiMsg( 'rev-deleted-text-permission' );
 897                                                         $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
 898                                                         wfProfileOut( __METHOD__ );
 899                                                         return;
 900                                                 } else {
 901                                                         $wgOut->addWikiMsg( 'rev-deleted-text-view' );
 902                                                         // and we are allowed to see...
 903                                                 }
 904                                         }
 905                                 }
 906                         }
 907
 908                         $wgOut->setRevisionId( $this->getRevIdFetched() );
 909
 910                          // Pages containing custom CSS or JavaScript get special treatment
 911                         if( $this->mTitle->isCssOrJsPage() || $this->mTitle->isCssJsSubpage() ) {
 912                                 $wgOut->addHTML( wfMsgExt( 'clearyourcache', 'parse' ) );
 913                                 // Give hooks a chance to customise the output
 914                                 if( wfRunHooks( 'ShowRawCssJs', array( $this->mContent, $this->mTitle, $wgOut ) ) ) {
 915                                         // Wrap the whole lot in a <pre> and don't parse
 916                                         $m = array();
 917                                         preg_match( '!\.(css|js)$!u', $this->mTitle->getText(), $m );
 918                                         $wgOut->addHTML( "<pre class=\"mw-code mw-{$m[1]}\" dir=\"ltr\">\n" );
 919                                         $wgOut->addHTML( htmlspecialchars( $this->mContent ) );
 920                                         $wgOut->addHTML( "\n</pre>\n" );
 921                                 }
 922                         } else if( $rt = Title::newFromRedirect( $text ) ) {
 923                                 # Don't append the subtitle if this was an old revision
 924                                 $wgOut->addHTML( $this->viewRedirect( $rt, !$wasRedirected && $this->isCurrent() ) );
 925                                 $parseout = $wgParser->parse($text, $this->mTitle, ParserOptions::newFromUser($wgUser));
 926                                 $wgOut->addParserOutputNoText( $parseout );
 927                         } else if( $pcache ) {
 928                                 # Display content and save to parser cache
 929                                 $this->outputWikiText( $text );
 930                         } else {
 931                                 # Display content, don't attempt to save to parser cache
 932                                 # Don't show section-edit links on old revisions... this way lies madness.
 933                                 if( !$this->isCurrent() ) {
 934                                         $oldEditSectionSetting = $wgOut->parserOptions()->setEditSection( false );
 935                                 }
 936                                 # Display content and don't save to parser cache
 937                                 # With timing hack -- TS 2006-07-26
 938                                 $time = -wfTime();
 939                                 $this->outputWikiText( $text, false );
 940                                 $time += wfTime();
 941
 942                                 # Timing hack
 943                                 if( $time > 3 ) {
 944                                         wfDebugLog( 'slow-parse', sprintf( "%-5.2f %s", $time,
 945                                                 $this->mTitle->getPrefixedDBkey()));
 946                                 }
 947
 948                                 if( !$this->isCurrent() ) {
 949                                         $wgOut->parserOptions()->setEditSection( $oldEditSectionSetting );
 950                                 }
 951                         }
 952                 }
 953                 /* title may have been set from the cache */
 954                 $t = $wgOut->getPageTitle();
 955                 if( empty( $t ) ) {
 956                         $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
 957
 958                         # For the main page, overwrite the <title> element with the con-
 959                         # tents of 'pagetitle-view-mainpage' instead of the default (if
 960                         # that's not empty).
 961                         if( $this->mTitle->equals( Title::newMainPage() ) &&
 962                         wfMsgForContent( 'pagetitle-view-mainpage' ) !== '' ) {
 963                                 $wgOut->setHTMLTitle( wfMsgForContent( 'pagetitle-view-mainpage' ) );
 964                         }
 965                 }
 966
 967                 # check if we're displaying a [[User talk:x.x.x.x]] anonymous talk page
 968                 if( $ns == NS_USER_TALK && IP::isValid( $this->mTitle->getText() ) ) {
 969                         $wgOut->addWikiMsg('anontalkpagetext');
 970                 }
 971
 972                 # Only diffs and new page links from RC give rcid params, so if
 973                 # we are just viewing the page normally with no rcid, try to find it.
 974                 # This is more convenient for users.
 975                 if( empty($rcid) && $this->mTitle->exists() && $this->mTitle->userCan('patrol') ) {
 976                         $firstRev = $this->mTitle->getFirstRevision();
 977                         $rcid = $firstRev ? $firstRev->isUnpatrolled() : 0;
 978                 }
 979                 # If we have been passed an &rcid= parameter, we want to give the user a
 980                 # chance to mark this new article as patrolled.
 981                 if( !empty($rcid) && $this->mTitle->exists() && $this->mTitle->userCan('patrol') ) {
 982                         $wgOut->addHTML(
 983                                 "<div class='patrollink'>" .
 984                                         wfMsgHtml( 'markaspatrolledlink',
 985                                         $sk->makeKnownLinkObj( $this->mTitle, wfMsgHtml('markaspatrolledtext'),
 986                                                 "action=markpatrolled&rcid=$rcid" )
 987                                         ) .
 988                                 '</div>'
 989                          );
 990                 }
 991
 992                 # Trackbacks
 993                 if( $wgUseTrackbacks ) {
 994                         $this->addTrackbacks();
 995                 }
 996
 997                 $this->viewUpdates();
 998                 wfProfileOut( __METHOD__ );
 999         }
1000
1001         protected function showDeletionLog() {
1002                 global $wgUser, $wgOut;
1003                 $loglist = new LogEventsList( $wgUser->getSkin(), $wgOut );
1004                 $pager = new LogPager( $loglist, 'delete', false, $this->mTitle->getPrefixedText() );
1005                 if( $pager->getNumRows() > 0 ) {
1006                         $pager->mLimit = 10;
1007                         $wgOut->addHTML( '<div class="mw-warning-with-logexcerpt">' );
1008                         $wgOut->addWikiMsg( 'deleted-notice' );
1009                         $wgOut->addHTML(
1010                                 $loglist->beginLogEventsList() .
1011                                 $pager->getBody() .
1012                                 $loglist->endLogEventsList()
1013                         );
1014                         if( $pager->getNumRows() > 10 ) {
1015                                 $wgOut->addHTML( $wgUser->getSkin()->link(
1016                                         SpecialPage::getTitleFor( 'Log' ),
1017                                         wfMsgHtml( 'deletelog-fulllog' ),
1018                                         array(),
1019                                         array( 'type' => 'delete', 'page' => $this->mTitle->getPrefixedText() )
1020                                 ) );
1021                         }
1022                         $wgOut->addHTML( '</div>' );
1023                 }
1024         }
1025
1026         /*
1027         * Should the parser cache be used?
1028         */
1029         protected function useParserCache( $oldid ) {
1030                 global $wgUser, $wgEnableParserCache;
1031
1032                 return $wgEnableParserCache
1033                         && intval( $wgUser->getOption( 'stubthreshold' ) ) == 0
1034                         && $this->exists()
1035                         && empty( $oldid )
1036                         && !$this->mTitle->isCssOrJsPage()
1037                         && !$this->mTitle->isCssJsSubpage();
1038         }
1039
1040         /**
1041          * View redirect
1042          * @param $target Title object of destination to redirect
1043          * @param $appendSubtitle Boolean [optional]
1044          * @param $forceKnown Boolean: should the image be shown as a bluelink regardless of existence?
1045          */
1046         public function viewRedirect( $target, $appendSubtitle = true, $forceKnown = false ) {
1047                 global $wgParser, $wgOut, $wgContLang, $wgStylePath, $wgUser;
1048                 # Display redirect
1049                 $imageDir = $wgContLang->isRTL() ? 'rtl' : 'ltr';
1050                 $imageUrl = $wgStylePath.'/common/images/redirect' . $imageDir . '.png';
1051
1052                 if( $appendSubtitle ) {
1053                         $wgOut->appendSubtitle( wfMsgHtml( 'redirectpagesub' ) );
1054                 }
1055                 $sk = $wgUser->getSkin();
1056                 if( $forceKnown ) {
1057                         $link = $sk->makeKnownLinkObj( $target, htmlspecialchars( $target->getFullText() ) );
1058                 } else {
1059                         $link = $sk->makeLinkObj( $target, htmlspecialchars( $target->getFullText() ) );
1060                 }
1061                 return '<img src="'.$imageUrl.'" alt="#REDIRECT " />' .
1062                         '<span class="redirectText">'.$link.'</span>';
1063
1064         }
1065
1066         public function addTrackbacks() {
1067                 global $wgOut, $wgUser;
1068                 $dbr = wfGetDB( DB_SLAVE );
1069                 $tbs = $dbr->select( 'trackbacks',
1070                         array('tb_id', 'tb_title', 'tb_url', 'tb_ex', 'tb_name'),
1071                         array('tb_page' => $this->getID() )
1072                 );
1073                 if( !$dbr->numRows($tbs) ) return;
1074
1075                 $tbtext = "";
1076                 while( $o = $dbr->fetchObject($tbs) ) {
1077                         $rmvtxt = "";
1078                         if( $wgUser->isAllowed( 'trackback' ) ) {
1079                                 $delurl = $this->mTitle->getFullURL("action=deletetrackback&tbid=" .
1080                                         $o->tb_id . "&token=" . urlencode( $wgUser->editToken() ) );
1081                                 $rmvtxt = wfMsg( 'trackbackremove', htmlspecialchars( $delurl ) );
1082                         }
1083                         $tbtext .= "\n";
1084                         $tbtext .= wfMsg(strlen($o->tb_ex) ? 'trackbackexcerpt' : 'trackback',
1085                                         $o->tb_title,
1086                                         $o->tb_url,
1087                                         $o->tb_ex,
1088                                         $o->tb_name,
1089                                         $rmvtxt);
1090                 }
1091                 $wgOut->addWikiMsg( 'trackbackbox', $tbtext );
1092                 $this->mTitle->invalidateCache();
1093         }
1094
1095         public function deletetrackback() {
1096                 global $wgUser, $wgRequest, $wgOut, $wgTitle;
1097                 if( !$wgUser->matchEditToken($wgRequest->getVal('token')) ) {
1098                         $wgOut->addWikiMsg( 'sessionfailure' );
1099                         return;
1100                 }
1101
1102                 $permission_errors = $this->mTitle->getUserPermissionsErrors( 'delete', $wgUser );
1103                 if( count($permission_errors) ) {
1104                         $wgOut->showPermissionsErrorPage( $permission_errors );
1105                         return;
1106                 }
1107
1108                 $db = wfGetDB( DB_MASTER );
1109                 $db->delete( 'trackbacks', array('tb_id' => $wgRequest->getInt('tbid')) );
1110
1111                 $wgOut->addWikiMsg( 'trackbackdeleteok' );
1112                 $this->mTitle->invalidateCache();
1113         }
1114
1115         public function render() {
1116                 global $wgOut;
1117                 $wgOut->setArticleBodyOnly(true);
1118                 $this->view();
1119         }
1120
1121         /**
1122          * Handle action=purge
1123          */
1124         public function purge() {
1125                 global $wgUser, $wgRequest, $wgOut;
1126                 if( $wgUser->isAllowed( 'purge' ) || $wgRequest->wasPosted() ) {
1127                         if( wfRunHooks( 'ArticlePurge', array( &$this ) ) ) {
1128                                 $this->doPurge();
1129                                 $this->view();
1130                         }
1131                 } else {
1132                         $action = htmlspecialchars( $wgRequest->getRequestURL() );
1133                         $button = wfMsgExt( 'confirm_purge_button', array('escapenoentities') );
1134                         $form = "<form method=\"post\" action=\"$action\">\n" .
1135                                         "<input type=\"submit\" name=\"submit\" value=\"$button\" />\n" .
1136                                         "</form>\n";
1137                         $top = wfMsgExt( 'confirm-purge-top', array('parse') );
1138                         $bottom = wfMsgExt( 'confirm-purge-bottom', array('parse') );
1139                         $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
1140                         $wgOut->setRobotPolicy( 'noindex,nofollow' );
1141                         $wgOut->addHTML( $top . $form . $bottom );
1142                 }
1143         }
1144
1145         /**
1146          * Perform the actions of a page purging
1147          */
1148         public function doPurge() {
1149                 global $wgUseSquid;
1150                 // Invalidate the cache
1151                 $this->mTitle->invalidateCache();
1152
1153                 if( $wgUseSquid ) {
1154                         // Commit the transaction before the purge is sent
1155                         $dbw = wfGetDB( DB_MASTER );
1156                         $dbw->immediateCommit();
1157
1158                         // Send purge
1159                         $update = SquidUpdate::newSimplePurge( $this->mTitle );
1160                         $update->doUpdate();
1161                 }
1162                 if( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
1163                         global $wgMessageCache;
1164                         if( $this->getID() == 0 ) {
1165                                 $text = false;
1166                         } else {
1167                                 $text = $this->getRawText();
1168                         }
1169                         $wgMessageCache->replace( $this->mTitle->getDBkey(), $text );
1170                 }
1171         }
1172
1173         /**
1174          * Insert a new empty page record for this article.
1175          * This *must* be followed up by creating a revision
1176          * and running $this->updateToLatest( $rev_id );
1177          * or else the record will be left in a funky state.
1178          * Best if all done inside a transaction.
1179          *
1180          * @param $dbw Database
1181          * @return int The newly created page_id key, or false if the title already existed
1182          * @private
1183          */
1184         public function insertOn( $dbw ) {
1185                 wfProfileIn( __METHOD__ );
1186
1187                 $page_id = $dbw->nextSequenceValue( 'page_page_id_seq' );
1188                 $dbw->insert( 'page', array(
1189                         'page_id'           => $page_id,
1190                         'page_namespace'    => $this->mTitle->getNamespace(),
1191                         'page_title'        => $this->mTitle->getDBkey(),
1192                         'page_counter'      => 0,
1193                         'page_restrictions' => '',
1194                         'page_is_redirect'  => 0, # Will set this shortly...
1195                         'page_is_new'       => 1,
1196                         'page_random'       => wfRandom(),
1197                         'page_touched'      => $dbw->timestamp(),
1198                         'page_latest'       => 0, # Fill this in shortly...
1199                         'page_len'          => 0, # Fill this in shortly...
1200                 ), __METHOD__, 'IGNORE' );
1201
1202                 $affected = $dbw->affectedRows();
1203                 if( $affected ) {
1204                         $newid = $dbw->insertId();
1205                         $this->mTitle->resetArticleId( $newid );
1206                 }
1207                 wfProfileOut( __METHOD__ );
1208                 return $affected ? $newid : false;
1209         }
1210
1211         /**
1212          * Update the page record to point to a newly saved revision.
1213          *
1214          * @param $dbw Database object
1215          * @param $revision Revision: For ID number, and text used to set
1216                             length and redirect status fields
1217          * @param $lastRevision Integer: if given, will not overwrite the page field
1218          *                      when different from the currently set value.
1219          *                      Giving 0 indicates the new page flag should be set
1220          *                      on.
1221          * @param $lastRevIsRedirect Boolean: if given, will optimize adding and
1222          *                                                       removing rows in redirect table.
1223          * @return bool true on success, false on failure
1224          * @private
1225          */
1226         public function updateRevisionOn( &$dbw, $revision, $lastRevision = null, $lastRevIsRedirect = null ) {
1227                 wfProfileIn( __METHOD__ );
1228
1229                 $text = $revision->getText();
1230                 $rt = Title::newFromRedirect( $text );
1231
1232                 $conditions = array( 'page_id' => $this->getId() );
1233                 if( !is_null( $lastRevision ) ) {
1234                         # An extra check against threads stepping on each other
1235                         $conditions['page_latest'] = $lastRevision;
1236                 }
1237
1238                 $dbw->update( 'page',
1239                         array( /* SET */
1240                                 'page_latest'      => $revision->getId(),
1241                                 'page_touched'     => $dbw->timestamp(),
1242                                 'page_is_new'      => ($lastRevision === 0) ? 1 : 0,
1243                                 'page_is_redirect' => $rt !== NULL ? 1 : 0,
1244                                 'page_len'         => strlen( $text ),
1245                         ),
1246                         $conditions,
1247                         __METHOD__ );
1248
1249                 $result = $dbw->affectedRows() != 0;
1250                 if( $result ) {
1251                         $this->updateRedirectOn( $dbw, $rt, $lastRevIsRedirect );
1252                 }
1253
1254                 wfProfileOut( __METHOD__ );
1255                 return $result;
1256         }
1257
1258         /**
1259          * Add row to the redirect table if this is a redirect, remove otherwise.
1260          *
1261          * @param $dbw Database
1262          * @param $redirectTitle a title object pointing to the redirect target,
1263          *                                               or NULL if this is not a redirect
1264          * @param $lastRevIsRedirect If given, will optimize adding and
1265          *                                                       removing rows in redirect table.
1266          * @return bool true on success, false on failure
1267          * @private
1268          */
1269         public function updateRedirectOn( &$dbw, $redirectTitle, $lastRevIsRedirect = null ) {
1270                 // Always update redirects (target link might have changed)
1271                 // Update/Insert if we don't know if the last revision was a redirect or not
1272                 // Delete if changing from redirect to non-redirect
1273                 $isRedirect = !is_null($redirectTitle);
1274                 if($isRedirect || is_null($lastRevIsRedirect) || $lastRevIsRedirect !== $isRedirect) {
1275                         wfProfileIn( __METHOD__ );
1276                         if( $isRedirect ) {
1277                                 // This title is a redirect, Add/Update row in the redirect table
1278                                 $set = array( /* SET */
1279                                         'rd_namespace' => $redirectTitle->getNamespace(),
1280                                         'rd_title'     => $redirectTitle->getDBkey(),
1281                                         'rd_from'      => $this->getId(),
1282                                 );
1283                                 $dbw->replace( 'redirect', array( 'rd_from' ), $set, __METHOD__ );
1284                         } else {
1285                                 // This is not a redirect, remove row from redirect table
1286                                 $where = array( 'rd_from' => $this->getId() );
1287                                 $dbw->delete( 'redirect', $where, __METHOD__);
1288                         }
1289                         if( $this->getTitle()->getNamespace() == NS_FILE ) {
1290                                 RepoGroup::singleton()->getLocalRepo()->invalidateImageRedirect( $this->getTitle() );
1291                         }
1292                         wfProfileOut( __METHOD__ );
1293                         return ( $dbw->affectedRows() != 0 );
1294                 }
1295                 return true;
1296         }
1297
1298         /**
1299          * If the given revision is newer than the currently set page_latest,
1300          * update the page record. Otherwise, do nothing.
1301          *
1302          * @param $dbw Database object
1303          * @param $revision Revision object
1304          */
1305         public function updateIfNewerOn( &$dbw, $revision ) {
1306                 wfProfileIn( __METHOD__ );
1307                 $row = $dbw->selectRow(
1308                         array( 'revision', 'page' ),
1309                         array( 'rev_id', 'rev_timestamp', 'page_is_redirect' ),
1310                         array(
1311                                 'page_id' => $this->getId(),
1312                                 'page_latest=rev_id' ),
1313                         __METHOD__ );
1314                 if( $row ) {
1315                         if( wfTimestamp(TS_MW, $row->rev_timestamp) >= $revision->getTimestamp() ) {
1316                                 wfProfileOut( __METHOD__ );
1317                                 return false;
1318                         }
1319                         $prev = $row->rev_id;
1320                         $lastRevIsRedirect = (bool)$row->page_is_redirect;
1321                 } else {
1322                         # No or missing previous revision; mark the page as new
1323                         $prev = 0;
1324                         $lastRevIsRedirect = null;
1325                 }
1326                 $ret = $this->updateRevisionOn( $dbw, $revision, $prev, $lastRevIsRedirect );
1327                 wfProfileOut( __METHOD__ );
1328                 return $ret;
1329         }
1330
1331         /**
1332          * @param $section empty/null/false or a section number (0, 1, 2, T1, T2...)
1333          * @return string Complete article text, or null if error
1334          */
1335         public function replaceSection( $section, $text, $summary = '', $edittime = NULL ) {
1336                 wfProfileIn( __METHOD__ );
1337                 if( strval( $section ) == '' ) {
1338                         // Whole-page edit; let the whole text through
1339                 } else {
1340                         if( is_null($edittime) ) {
1341                                 $rev = Revision::newFromTitle( $this->mTitle );
1342                         } else {
1343                                 $dbw = wfGetDB( DB_MASTER );
1344                                 $rev = Revision::loadFromTimestamp( $dbw, $this->mTitle, $edittime );
1345                         }
1346                         if( !$rev ) {
1347                                 wfDebug( "Article::replaceSection asked for bogus section (page: " .
1348                                         $this->getId() . "; section: $section; edittime: $edittime)\n" );
1349                                 return null;
1350                         }
1351                         $oldtext = $rev->getText();
1352
1353                         if( $section == 'new' ) {
1354                                 # Inserting a new section
1355                                 $subject = $summary ? wfMsgForContent('newsectionheaderdefaultlevel',$summary) . "\n\n" : '';
1356                                 $text = strlen( trim( $oldtext ) ) > 0
1357                                                 ? "{$oldtext}\n\n{$subject}{$text}"
1358                                                 : "{$subject}{$text}";
1359                         } else {
1360                                 # Replacing an existing section; roll out the big guns
1361                                 global $wgParser;
1362                                 $text = $wgParser->replaceSection( $oldtext, $section, $text );
1363                         }
1364                 }
1365                 wfProfileOut( __METHOD__ );
1366                 return $text;
1367         }
1368
1369         /**
1370          * @deprecated use Article::doEdit()
1371          */
1372         function insertNewArticle( $text, $summary, $isminor, $watchthis, $suppressRC=false, $comment=false, $bot=false ) {
1373                 wfDeprecated( __METHOD__ );
1374                 $flags = EDIT_NEW | EDIT_DEFER_UPDATES | EDIT_AUTOSUMMARY |
1375                         ( $isminor ? EDIT_MINOR : 0 ) |
1376                         ( $suppressRC ? EDIT_SUPPRESS_RC : 0 ) |
1377                         ( $bot ? EDIT_FORCE_BOT : 0 );
1378
1379                 # If this is a comment, add the summary as headline
1380                 if( $comment && $summary != "" ) {
1381                         $text = wfMsgForContent('newsectionheaderdefaultlevel',$summary) . "\n\n".$text;
1382                 }
1383
1384                 $this->doEdit( $text, $summary, $flags );
1385
1386                 $dbw = wfGetDB( DB_MASTER );
1387                 if($watchthis) {
1388                         if(!$this->mTitle->userIsWatching()) {
1389                                 $dbw->begin();
1390                                 $this->doWatch();
1391                                 $dbw->commit();
1392                         }
1393                 } else {
1394                         if( $this->mTitle->userIsWatching() ) {
1395                                 $dbw->begin();
1396                                 $this->doUnwatch();
1397                                 $dbw->commit();
1398                         }
1399                 }
1400                 $this->doRedirect( $this->isRedirect( $text ) );
1401         }
1402
1403         /**
1404          * @deprecated use Article::doEdit()
1405          */
1406         function updateArticle( $text, $summary, $minor, $watchthis, $forceBot = false, $sectionanchor = '' ) {
1407                 wfDeprecated( __METHOD__ );
1408                 $flags = EDIT_UPDATE | EDIT_DEFER_UPDATES | EDIT_AUTOSUMMARY |
1409                         ( $minor ? EDIT_MINOR : 0 ) |
1410                         ( $forceBot ? EDIT_FORCE_BOT : 0 );
1411
1412                 $status = $this->doEdit( $text, $summary, $flags );
1413                 if( !$status->isOK() ) {
1414                         return false;
1415                 }
1416
1417                 $dbw = wfGetDB( DB_MASTER );
1418                 if( $watchthis ) {
1419                         if(!$this->mTitle->userIsWatching()) {
1420                                 $dbw->begin();
1421                                 $this->doWatch();
1422                                 $dbw->commit();
1423                         }
1424                 } else {
1425                         if( $this->mTitle->userIsWatching() ) {
1426                                 $dbw->begin();
1427                                 $this->doUnwatch();
1428                                 $dbw->commit();
1429                         }
1430                 }
1431
1432                 $extraQuery = ''; // Give extensions a chance to modify URL query on update
1433                 wfRunHooks( 'ArticleUpdateBeforeRedirect', array( $this, &$sectionanchor, &$extraQuery ) );
1434
1435                 $this->doRedirect( $this->isRedirect( $text ), $sectionanchor, $extraQuery );
1436                 return true;
1437         }
1438
1439         /**
1440          * Article::doEdit()
1441          *
1442          * Change an existing article or create a new article. Updates RC and all necessary caches,
1443          * optionally via the deferred update array.
1444          *
1445          * $wgUser must be set before calling this function.
1446          *
1447          * @param $text String: new text
1448          * @param $summary String: edit summary
1449          * @param $flags Integer bitfield:
1450          *      EDIT_NEW
1451          *          Article is known or assumed to be non-existent, create a new one
1452          *      EDIT_UPDATE
1453          *          Article is known or assumed to be pre-existing, update it
1454          *      EDIT_MINOR
1455          *          Mark this edit minor, if the user is allowed to do so
1456          *      EDIT_SUPPRESS_RC
1457          *          Do not log the change in recentchanges
1458          *      EDIT_FORCE_BOT
1459          *          Mark the edit a "bot" edit regardless of user rights
1460          *      EDIT_DEFER_UPDATES
1461          *          Defer some of the updates until the end of index.php
1462          *      EDIT_AUTOSUMMARY
1463          *          Fill in blank summaries with generated text where possible
1464          *
1465          * If neither EDIT_NEW nor EDIT_UPDATE is specified, the status of the article will be detected.
1466          * If EDIT_UPDATE is specified and the article doesn't exist, the function will an
1467          * edit-gone-missing error. If EDIT_NEW is specified and the article does exist, an
1468          * edit-already-exists error will be returned. These two conditions are also possible with
1469          * auto-detection due to MediaWiki's performance-optimised locking strategy.
1470          *
1471          * @param $baseRevId the revision ID this edit was based off, if any
1472          * @param $user Optional user object, $wgUser will be used if not passed
1473          *
1474          * @return Status object. Possible errors:
1475          *     edit-hook-aborted:       The ArticleSave hook aborted the edit but didn't set the fatal flag of $status
1476          *     edit-gone-missing:       In update mode, but the article didn't exist
1477          *     edit-conflict:           In update mode, the article changed unexpectedly
1478          *     edit-no-change:          Warning that the text was the same as before
1479          *     edit-already-exists:     In creation mode, but the article already exists
1480          *
1481          *  Extensions may define additional errors.
1482          *
1483          *  $return->value will contain an associative array with members as follows:
1484          *     new:                     Boolean indicating if the function attempted to create a new article
1485          *     revision:                The revision object for the inserted revision, or null
1486          *
1487          *  Compatibility note: this function previously returned a boolean value indicating success/failure
1488          */
1489         public function doEdit( $text, $summary, $flags = 0, $baseRevId = false, $user = null ) {
1490                 global $wgUser, $wgDBtransactions, $wgUseAutomaticEditSummaries;
1491
1492                 # Low-level sanity check
1493                 if( $this->mTitle->getText() == '' ) {
1494                         throw new MWException( 'Something is trying to edit an article with an empty title' );
1495                 }
1496
1497                 wfProfileIn( __METHOD__ );
1498
1499                 $user = is_null($user) ? $wgUser : $user;
1500                 $status = Status::newGood( array() );
1501
1502                 # Load $this->mTitle->getArticleID() and $this->mLatest if it's not already
1503                 $this->loadPageData();
1504
1505                 if( !($flags & EDIT_NEW) && !($flags & EDIT_UPDATE) ) {
1506                         $aid = $this->mTitle->getArticleID();
1507                         if( $aid ) {
1508                                 $flags |= EDIT_UPDATE;
1509                         } else {
1510                                 $flags |= EDIT_NEW;
1511                         }
1512                 }
1513
1514                 if( !wfRunHooks( 'ArticleSave', array( &$this, &$user, &$text, &$summary,
1515                         $flags & EDIT_MINOR, null, null, &$flags, &$status ) ) )
1516                 {
1517                         wfDebug( __METHOD__ . ": ArticleSave hook aborted save!\n" );
1518                         wfProfileOut( __METHOD__ );
1519                         if( $status->isOK() ) {
1520                                 $status->fatal( 'edit-hook-aborted');
1521                         }
1522                         return $status;
1523                 }
1524
1525                 # Silently ignore EDIT_MINOR if not allowed
1526                 $isminor = ( $flags & EDIT_MINOR ) && $user->isAllowed('minoredit');
1527                 $bot = $flags & EDIT_FORCE_BOT;
1528
1529                 $oldtext = $this->getRawText(); // current revision
1530                 $oldsize = strlen( $oldtext );
1531
1532                 # Provide autosummaries if one is not provided and autosummaries are enabled.
1533                 if( $wgUseAutomaticEditSummaries && $flags & EDIT_AUTOSUMMARY && $summary == '' ) {
1534                         $summary = $this->getAutosummary( $oldtext, $text, $flags );
1535                 }
1536
1537                 $editInfo = $this->prepareTextForEdit( $text );
1538                 $text = $editInfo->pst;
1539                 $newsize = strlen( $text );
1540
1541                 $dbw = wfGetDB( DB_MASTER );
1542                 $now = wfTimestampNow();
1543
1544                 if( $flags & EDIT_UPDATE ) {
1545                         # Update article, but only if changed.
1546                         $status->value['new'] = false;
1547                         # Make sure the revision is either completely inserted or not inserted at all
1548                         if( !$wgDBtransactions ) {
1549                                 $userAbort = ignore_user_abort( true );
1550                         }
1551
1552                         $revisionId = 0;
1553
1554                         $changed = ( strcmp( $text, $oldtext ) != 0 );
1555
1556                         if( $changed ) {
1557                                 $this->mGoodAdjustment = (int)$this->isCountable( $text )
1558                                   - (int)$this->isCountable( $oldtext );
1559                                 $this->mTotalAdjustment = 0;
1560
1561                                 if( !$this->mLatest ) {
1562                                         # Article gone missing
1563                                         wfDebug( __METHOD__.": EDIT_UPDATE specified but article doesn't exist\n" );
1564                                         $status->fatal( 'edit-gone-missing' );
1565                                         wfProfileOut( __METHOD__ );
1566                                         return $status;
1567                                 }
1568
1569                                 $revision = new Revision( array(
1570                                         'page'       => $this->getId(),
1571                                         'comment'    => $summary,
1572                                         'minor_edit' => $isminor,
1573                                         'text'       => $text,
1574                                         'parent_id'  => $this->mLatest,
1575                                         'user'       => $user->getId(),
1576                                         'user_text'  => $user->getName(),
1577                                         ) );
1578
1579                                 $dbw->begin();
1580                                 $revisionId = $revision->insertOn( $dbw );
1581
1582                                 # Update page
1583                                 #
1584                                 # Note that we use $this->mLatest instead of fetching a value from the master DB
1585                                 # during the course of this function. This makes sure that EditPage can detect
1586                                 # edit conflicts reliably, either by $ok here, or by $article->getTimestamp()
1587                                 # before this function is called. A previous function used a separate query, this
1588                                 # creates a window where concurrent edits can cause an ignored edit conflict.
1589                                 $ok = $this->updateRevisionOn( $dbw, $revision, $this->mLatest );
1590
1591                                 if( !$ok ) {
1592                                         /* Belated edit conflict! Run away!! */
1593                                         $status->fatal( 'edit-conflict' );
1594                                         # Delete the invalid revision if the DB is not transactional
1595                                         if( !$wgDBtransactions ) {
1596                                                 $dbw->delete( 'revision', array( 'rev_id' => $revisionId ), __METHOD__ );
1597                                         }
1598                                         $revisionId = 0;
1599                                         $dbw->rollback();
1600                                 } else {
1601                                         global $wgUseRCPatrol;
1602                                         wfRunHooks( 'NewRevisionFromEditComplete', array($this, $revision, $baseRevId, $user) );
1603                                         # Update recentchanges
1604                                         if( !( $flags & EDIT_SUPPRESS_RC ) ) {
1605                                                 # Mark as patrolled if the user can do so
1606                                                 $patrolled = $wgUseRCPatrol && $this->mTitle->userCan('autopatrol');
1607                                                 # Add RC row to the DB
1608                                                 $rc = RecentChange::notifyEdit( $now, $this->mTitle, $isminor, $user, $summary,
1609                                                         $this->mLatest, $this->getTimestamp(), $bot, '', $oldsize, $newsize,
1610                                                         $revisionId, $patrolled
1611                                                 );
1612                                                 # Log auto-patrolled edits
1613                                                 if( $patrolled ) {
1614                                                         PatrolLog::record( $rc, true );
1615                                                 }
1616                                         }
1617                                         $user->incEditCount();
1618                                         $dbw->commit();
1619                                 }
1620                         } else {
1621                                 $status->warning( 'edit-no-change' );
1622                                 $revision = null;
1623                                 // Keep the same revision ID, but do some updates on it
1624                                 $revisionId = $this->getRevIdFetched();
1625                                 // Update page_touched, this is usually implicit in the page update
1626                                 // Other cache updates are done in onArticleEdit()
1627                                 $this->mTitle->invalidateCache();
1628                         }
1629
1630                         if( !$wgDBtransactions ) {
1631                                 ignore_user_abort( $userAbort );
1632                         }
1633                         // Now that ignore_user_abort is restored, we can respond to fatal errors
1634                         if( !$status->isOK() ) {
1635                                 wfProfileOut( __METHOD__ );
1636                                 return $status;
1637                         }
1638
1639                         # Invalidate cache of this article and all pages using this article
1640                         # as a template. Partly deferred. Leave templatelinks for editUpdates().
1641                         Article::onArticleEdit( $this->mTitle, 'skiptransclusions' );
1642                         # Update links tables, site stats, etc.
1643                         $this->editUpdates( $text, $summary, $isminor, $now, $revisionId, $changed );
1644                 } else {
1645                         # Create new article
1646                         $status->value['new'] = true;
1647
1648                         # Set statistics members
1649                         # We work out if it's countable after PST to avoid counter drift
1650                         # when articles are created with {{subst:}}
1651                         $this->mGoodAdjustment = (int)$this->isCountable( $text );
1652                         $this->mTotalAdjustment = 1;
1653
1654                         $dbw->begin();
1655
1656                         # Add the page record; stake our claim on this title!
1657                         # This will return false if the article already exists
1658                         $newid = $this->insertOn( $dbw );
1659
1660                         if( $newid === false ) {
1661                                 $dbw->rollback();
1662                                 $status->fatal( 'edit-already-exists' );
1663                                 wfProfileOut( __METHOD__ );
1664                                 return $status;
1665                         }
1666
1667                         # Save the revision text...
1668                         $revision = new Revision( array(
1669                                 'page'       => $newid,
1670                                 'comment'    => $summary,
1671                                 'minor_edit' => $isminor,
1672                                 'text'       => $text,
1673                                 'user'       => $user->getId(),
1674                                 'user_text'  => $user->getName(),
1675                                 ) );
1676                         $revisionId = $revision->insertOn( $dbw );
1677
1678                         $this->mTitle->resetArticleID( $newid );
1679
1680                         # Update the page record with revision data
1681                         $this->updateRevisionOn( $dbw, $revision, 0 );
1682
1683                         wfRunHooks( 'NewRevisionFromEditComplete', array($this, $revision, false, $user) );
1684                         # Update recentchanges
1685                         if( !( $flags & EDIT_SUPPRESS_RC ) ) {
1686                                 global $wgUseRCPatrol, $wgUseNPPatrol;
1687                                 # Mark as patrolled if the user can do so
1688                                 $patrolled = ($wgUseRCPatrol || $wgUseNPPatrol) && $this->mTitle->userCan('autopatrol');
1689                                 # Add RC row to the DB
1690                                 $rc = RecentChange::notifyNew( $now, $this->mTitle, $isminor, $user, $summary, $bot,
1691                                         '', strlen($text), $revisionId, $patrolled );
1692                                 # Log auto-patrolled edits
1693                                 if( $patrolled ) {
1694                                         PatrolLog::record( $rc, true );
1695                                 }
1696                         }
1697                         $user->incEditCount();
1698                         $dbw->commit();
1699
1700                         # Update links, etc.
1701                         $this->editUpdates( $text, $summary, $isminor, $now, $revisionId, true );
1702
1703                         # Clear caches
1704                         Article::onArticleCreate( $this->mTitle );
1705
1706                         wfRunHooks( 'ArticleInsertComplete', array( &$this, &$user, $text, $summary,
1707                                 $flags & EDIT_MINOR, null, null, &$flags, $revision ) );
1708                 }
1709
1710                 # Do updates right now unless deferral was requested
1711                 if( !( $flags & EDIT_DEFER_UPDATES ) ) {
1712                         wfDoUpdates();
1713                 }
1714
1715                 // Return the new revision (or null) to the caller
1716                 $status->value['revision'] = $revision;
1717
1718                 wfRunHooks( 'ArticleSaveComplete', array( &$this, &$user, $text, $summary,
1719                         $flags & EDIT_MINOR, null, null, &$flags, $revision, &$status ) );
1720
1721                 wfProfileOut( __METHOD__ );
1722                 return $status;
1723         }
1724
1725         /**
1726          * @deprecated wrapper for doRedirect
1727          */
1728         public function showArticle( $text, $subtitle , $sectionanchor = '', $me2, $now, $summary, $oldid ) {
1729                 wfDeprecated( __METHOD__ );
1730                 $this->doRedirect( $this->isRedirect( $text ), $sectionanchor );
1731         }
1732
1733         /**
1734          * Output a redirect back to the article.
1735          * This is typically used after an edit.
1736          *
1737          * @param $noRedir Boolean: add redirect=no
1738          * @param $sectionAnchor String: section to redirect to, including "#"
1739          * @param $extraQuery String: extra query params
1740          */
1741         public function doRedirect( $noRedir = false, $sectionAnchor = '', $extraQuery = '' ) {
1742                 global $wgOut;
1743                 if( $noRedir ) {
1744                         $query = 'redirect=no';
1745                         if( $extraQuery )
1746                                 $query .= "&$query";
1747                 } else {
1748                         $query = $extraQuery;
1749                 }
1750                 $wgOut->redirect( $this->mTitle->getFullURL( $query ) . $sectionAnchor );
1751         }
1752
1753         /**
1754          * Mark this particular edit/page as patrolled
1755          */
1756         public function markpatrolled() {
1757                 global $wgOut, $wgRequest, $wgUseRCPatrol, $wgUseNPPatrol, $wgUser;
1758                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1759
1760                 # If we haven't been given an rc_id value, we can't do anything
1761                 $rcid = (int) $wgRequest->getVal('rcid');
1762                 $rc = RecentChange::newFromId($rcid);
1763                 if( is_null($rc) ) {
1764                         $wgOut->showErrorPage( 'markedaspatrollederror', 'markedaspatrollederrortext' );
1765                         return;
1766                 }
1767
1768                 #It would be nice to see where the user had actually come from, but for now just guess
1769                 $returnto = $rc->getAttribute( 'rc_type' ) == RC_NEW ? 'Newpages' : 'Recentchanges';
1770                 $return = Title::makeTitle( NS_SPECIAL, $returnto );
1771
1772                 $dbw = wfGetDB( DB_MASTER );
1773                 $errors = $rc->doMarkPatrolled();
1774
1775                 if( in_array(array('rcpatroldisabled'), $errors) ) {
1776                         $wgOut->showErrorPage( 'rcpatroldisabled', 'rcpatroldisabledtext' );
1777                         return;
1778                 }
1779
1780                 if( in_array(array('hookaborted'), $errors) ) {
1781                         // The hook itself has handled any output
1782                         return;
1783                 }
1784
1785                 if( in_array(array('markedaspatrollederror-noautopatrol'), $errors) ) {
1786                         $wgOut->setPageTitle( wfMsg( 'markedaspatrollederror' ) );
1787                         $wgOut->addWikiMsg( 'markedaspatrollederror-noautopatrol' );
1788                         $wgOut->returnToMain( false, $return );
1789                         return;
1790                 }
1791
1792                 if( !empty($errors) ) {
1793                         $wgOut->showPermissionsErrorPage( $errors );
1794                         return;
1795                 }
1796
1797                 # Inform the user
1798                 $wgOut->setPageTitle( wfMsg( 'markedaspatrolled' ) );
1799                 $wgOut->addWikiMsg( 'markedaspatrolledtext' );
1800                 $wgOut->returnToMain( false, $return );
1801         }
1802
1803         /**
1804          * User-interface handler for the "watch" action
1805          */
1806
1807         public function watch() {
1808                 global $wgUser, $wgOut;
1809                 if( $wgUser->isAnon() ) {
1810                         $wgOut->showErrorPage( 'watchnologin', 'watchnologintext' );
1811                         return;
1812                 }
1813                 if( wfReadOnly() ) {
1814                         $wgOut->readOnlyPage();
1815                         return;
1816                 }
1817                 if( $this->doWatch() ) {
1818                         $wgOut->setPagetitle( wfMsg( 'addedwatch' ) );
1819                         $wgOut->setRobotPolicy( 'noindex,nofollow' );
1820                         $wgOut->addWikiMsg( 'addedwatchtext', $this->mTitle->getPrefixedText() );
1821                 }
1822                 $wgOut->returnToMain( true, $this->mTitle->getPrefixedText() );
1823         }
1824
1825         /**
1826          * Add this page to $wgUser's watchlist
1827          * @return bool true on successful watch operation
1828          */
1829         public function doWatch() {
1830                 global $wgUser;
1831                 if( $wgUser->isAnon() ) {
1832                         return false;
1833                 }
1834                 if( wfRunHooks('WatchArticle', array(&$wgUser, &$this)) ) {
1835                         $wgUser->addWatch( $this->mTitle );
1836                         return wfRunHooks('WatchArticleComplete', array(&$wgUser, &$this));
1837                 }
1838                 return false;
1839         }
1840
1841         /**
1842          * User interface handler for the "unwatch" action.
1843          */
1844         public function unwatch() {
1845                 global $wgUser, $wgOut;
1846                 if( $wgUser->isAnon() ) {
1847                         $wgOut->showErrorPage( 'watchnologin', 'watchnologintext' );
1848                         return;
1849                 }
1850                 if( wfReadOnly() ) {
1851                         $wgOut->readOnlyPage();
1852                         return;
1853                 }
1854                 if( $this->doUnwatch() ) {
1855                         $wgOut->setPagetitle( wfMsg( 'removedwatch' ) );
1856                         $wgOut->setRobotPolicy( 'noindex,nofollow' );
1857                         $wgOut->addWikiMsg( 'removedwatchtext', $this->mTitle->getPrefixedText() );
1858                 }
1859                 $wgOut->returnToMain( true, $this->mTitle->getPrefixedText() );
1860         }
1861
1862         /**
1863          * Stop watching a page
1864          * @return bool true on successful unwatch
1865          */
1866         public function doUnwatch() {
1867                 global $wgUser;
1868                 if( $wgUser->isAnon() ) {
1869                         return false;
1870                 }
1871                 if( wfRunHooks('UnwatchArticle', array(&$wgUser, &$this)) ) {
1872                         $wgUser->removeWatch( $this->mTitle );
1873                         return wfRunHooks('UnwatchArticleComplete', array(&$wgUser, &$this));
1874                 }
1875                 return false;
1876         }
1877
1878         /**
1879          * action=protect handler
1880          */
1881         public function protect() {
1882                 $form = new ProtectionForm( $this );
1883                 $form->execute();
1884         }
1885
1886         /**
1887          * action=unprotect handler (alias)
1888          */
1889         public function unprotect() {
1890                 $this->protect();
1891         }
1892
1893         /**
1894          * Update the article's restriction field, and leave a log entry.
1895          *
1896          * @param $limit Array: set of restriction keys
1897          * @param $reason String
1898          * @param &$cascade Integer. Set to false if cascading protection isn't allowed.
1899          * @param $expiry Array: per restriction type expiration
1900          * @return bool true on success
1901          */
1902         public function updateRestrictions( $limit = array(), $reason = '', &$cascade = 0, $expiry = array() ) {
1903                 global $wgUser, $wgRestrictionTypes, $wgContLang;
1904
1905                 $id = $this->mTitle->getArticleID();
1906                 if( $id <= 0 || wfReadOnly() || !$this->mTitle->userCan('protect') ) {
1907                         return false;
1908                 }
1909
1910                 if( !$cascade ) {
1911                         $cascade = false;
1912                 }
1913
1914                 // Take this opportunity to purge out expired restrictions
1915                 Title::purgeExpiredRestrictions();
1916
1917                 # FIXME: Same limitations as described in ProtectionForm.php (line 37);
1918                 # we expect a single selection, but the schema allows otherwise.
1919                 $current = array();
1920                 $updated = Article::flattenRestrictions( $limit );
1921                 $changed = false;
1922                 foreach( $wgRestrictionTypes as $action ) {
1923                         if( isset( $expiry[$action] ) ) {
1924                                 # Get current restrictions on $action
1925                                 $aLimits = $this->mTitle->getRestrictions( $action );
1926                                 $current[$action] = implode( '', $aLimits );
1927                                 # Are any actual restrictions being dealt with here?
1928                                 $aRChanged = count($aLimits) || !empty($limit[$action]);
1929                                 # If something changed, we need to log it. Checking $aRChanged
1930                                 # assures that "unprotecting" a page that is not protected does
1931                                 # not log just because the expiry was "changed".
1932                                 if( $aRChanged && $this->mTitle->mRestrictionsExpiry[$action] != $expiry[$action] ) {
1933                                         $changed = true;
1934                                 }
1935                         }
1936                 }
1937
1938                 $current = Article::flattenRestrictions( $current );
1939
1940                 $changed = ($changed || $current != $updated );
1941                 $changed = $changed || ($updated && $this->mTitle->areRestrictionsCascading() != $cascade);
1942                 $protect = ( $updated != '' );
1943
1944                 # If nothing's changed, do nothing
1945                 if( $changed ) {
1946                         if( wfRunHooks( 'ArticleProtect', array( &$this, &$wgUser, $limit, $reason ) ) ) {
1947
1948                                 $dbw = wfGetDB( DB_MASTER );
1949
1950                                 # Prepare a null revision to be added to the history
1951                                 $modified = $current != '' && $protect;
1952                                 if( $protect ) {
1953                                         $comment_type = $modified ? 'modifiedarticleprotection' : 'protectedarticle';
1954                                 } else {
1955                                         $comment_type = 'unprotectedarticle';
1956                                 }
1957                                 $comment = $wgContLang->ucfirst( wfMsgForContent( $comment_type, $this->mTitle->getPrefixedText() ) );
1958
1959                                 # Only restrictions with the 'protect' right can cascade...
1960                                 # Otherwise, people who cannot normally protect can "protect" pages via transclusion
1961                                 $editrestriction = isset( $limit['edit'] ) ? array( $limit['edit'] ) : $this->mTitle->getRestrictions( 'edit' );
1962                                 # The schema allows multiple restrictions
1963                                 if(!in_array('protect', $editrestriction) && !in_array('sysop', $editrestriction))
1964                                         $cascade = false;
1965                                 $cascade_description = '';
1966                                 if( $cascade ) {
1967                                         $cascade_description = ' ['.wfMsgForContent('protect-summary-cascade').']';
1968                                 }
1969
1970                                 if( $reason )
1971                                         $comment .= ": $reason";
1972
1973                                 $editComment = $comment;
1974                                 $encodedExpiry = array();
1975                                 $protect_description = '';
1976                                 foreach( $limit as $action => $restrictions  ) {
1977                                         $encodedExpiry[$action] = Block::encodeExpiry($expiry[$action], $dbw );
1978                                         if( $restrictions != '' ) {
1979                                                 $protect_description .= "[$action=$restrictions] (";
1980                                                 if( $encodedExpiry[$action] != 'infinity' ) {
1981                                                         $protect_description .= wfMsgForContent( 'protect-expiring',
1982                                                                 $wgContLang->timeanddate( $expiry[$action], false, false ) ,
1983                                                                 $wgContLang->date( $expiry[$action], false, false ) ,
1984                                                                 $wgContLang->time( $expiry[$action], false, false ) );
1985                                                 } else {
1986                                                         $protect_description .= wfMsgForContent( 'protect-expiry-indefinite' );
1987                                                 }
1988                                                 $protect_description .= ') ';
1989                                         }
1990                                 }
1991                                 $protect_description = trim($protect_description);
1992
1993                                 if( $protect_description && $protect )
1994                                         $editComment .= " ($protect_description)";
1995                                 if( $cascade )
1996                                         $editComment .= "$cascade_description";
1997                                 # Update restrictions table
1998                                 foreach( $limit as $action => $restrictions ) {
1999                                         if($restrictions != '' ) {
2000                                                 $dbw->replace( 'page_restrictions', array(array('pr_page', 'pr_type')),
2001                                                         array( 'pr_page' => $id,
2002                                                                 'pr_type' => $action,
2003                                                                 'pr_level' => $restrictions,
2004                                                                 'pr_cascade' => ($cascade && $action == 'edit') ? 1 : 0,
2005                                                                 'pr_expiry' => $encodedExpiry[$action] ), __METHOD__  );
2006                                         } else {
2007                                                 $dbw->delete( 'page_restrictions', array( 'pr_page' => $id,
2008                                                         'pr_type' => $action ), __METHOD__ );
2009                                         }
2010                                 }
2011
2012                                 # Insert a null revision
2013                                 $nullRevision = Revision::newNullRevision( $dbw, $id, $editComment, true );
2014                                 $nullRevId = $nullRevision->insertOn( $dbw );
2015
2016                                 $latest = $this->getLatest();
2017                                 # Update page record
2018                                 $dbw->update( 'page',
2019                                         array( /* SET */
2020                                                 'page_touched' => $dbw->timestamp(),
2021                                                 'page_restrictions' => '',
2022                                                 'page_latest' => $nullRevId
2023                                         ), array( /* WHERE */
2024                                                 'page_id' => $id
2025                                         ), 'Article::protect'
2026                                 );
2027
2028                                 wfRunHooks( 'NewRevisionFromEditComplete', array($this, $nullRevision, $latest, $wgUser) );
2029                                 wfRunHooks( 'ArticleProtectComplete', array( &$this, &$wgUser, $limit, $reason ) );
2030
2031                                 # Update the protection log
2032                                 $log = new LogPage( 'protect' );
2033                                 if( $protect ) {
2034                                         $params = array($protect_description,$cascade ? 'cascade' : '');
2035                                         $log->addEntry( $modified ? 'modify' : 'protect', $this->mTitle, trim( $reason), $params );
2036                                 } else {
2037                                         $log->addEntry( 'unprotect', $this->mTitle, $reason );
2038                                 }
2039
2040                         } # End hook
2041                 } # End "changed" check
2042
2043                 return true;
2044         }
2045
2046         /**
2047          * Take an array of page restrictions and flatten it to a string
2048          * suitable for insertion into the page_restrictions field.
2049          * @param $limit Array
2050          * @return String
2051          */
2052         protected static function flattenRestrictions( $limit ) {
2053                 if( !is_array( $limit ) ) {
2054                         throw new MWException( 'Article::flattenRestrictions given non-array restriction set' );
2055                 }
2056                 $bits = array();
2057                 ksort( $limit );
2058                 foreach( $limit as $action => $restrictions ) {
2059                         if( $restrictions != '' ) {
2060                                 $bits[] = "$action=$restrictions";
2061                         }
2062                 }
2063                 return implode( ':', $bits );
2064         }
2065
2066         /**
2067          * Auto-generates a deletion reason
2068          * @param &$hasHistory Boolean: whether the page has a history
2069          */
2070         public function generateReason( &$hasHistory ) {
2071                 global $wgContLang;
2072                 $dbw = wfGetDB( DB_MASTER );
2073                 // Get the last revision
2074                 $rev = Revision::newFromTitle( $this->mTitle );
2075                 if( is_null( $rev ) )
2076                         return false;
2077
2078                 // Get the article's contents
2079                 $contents = $rev->getText();
2080                 $blank = false;
2081                 // If the page is blank, use the text from the previous revision,
2082                 // which can only be blank if there's a move/import/protect dummy revision involved
2083                 if( $contents == '' ) {
2084                         $prev = $rev->getPrevious();
2085                         if( $prev )     {
2086                                 $contents = $prev->getText();
2087                                 $blank = true;
2088                         }
2089                 }
2090
2091                 // Find out if there was only one contributor
2092                 // Only scan the last 20 revisions
2093                 $limit = 20;
2094                 $res = $dbw->select( 'revision', 'rev_user_text',
2095                         array( 'rev_page' => $this->getID() ), __METHOD__,
2096                         array( 'LIMIT' => $limit )
2097                 );
2098                 if( $res === false )
2099                         // This page has no revisions, which is very weird
2100                         return false;
2101                 if( $res->numRows() > 1 )
2102                                 $hasHistory = true;
2103                 else
2104                                 $hasHistory = false;
2105                 $row = $dbw->fetchObject( $res );
2106                 $onlyAuthor = $row->rev_user_text;
2107                 // Try to find a second contributor
2108                 foreach( $res as $row ) {
2109                         if( $row->rev_user_text != $onlyAuthor ) {
2110                                 $onlyAuthor = false;
2111                                 break;
2112                         }
2113                 }
2114                 $dbw->freeResult( $res );
2115
2116                 // Generate the summary with a '$1' placeholder
2117                 if( $blank ) {
2118                         // The current revision is blank and the one before is also
2119                         // blank. It's just not our lucky day
2120                         $reason = wfMsgForContent( 'exbeforeblank', '$1' );
2121                 } else {
2122                         if( $onlyAuthor )
2123                                 $reason = wfMsgForContent( 'excontentauthor', '$1', $onlyAuthor );
2124                         else
2125                                 $reason = wfMsgForContent( 'excontent', '$1' );
2126                 }
2127
2128                 if( $reason == '-' ) {
2129                         // Allow these UI messages to be blanked out cleanly
2130                         return '';
2131                 }
2132
2133                 // Replace newlines with spaces to prevent uglyness
2134                 $contents = preg_replace( "/[\n\r]/", ' ', $contents );
2135                 // Calculate the maximum amount of chars to get
2136                 // Max content length = max comment length - length of the comment (excl. $1) - '...'
2137                 $maxLength = 255 - (strlen( $reason ) - 2) - 3;
2138                 $contents = $wgContLang->truncate( $contents, $maxLength, '...' );
2139                 // Remove possible unfinished links
2140                 $contents = preg_replace( '/\[\[([^\]]*)\]?$/', '$1', $contents );
2141                 // Now replace the '$1' placeholder
2142                 $reason = str_replace( '$1', $contents, $reason );
2143                 return $reason;
2144         }
2145
2146
2147         /*
2148          * UI entry point for page deletion
2149          */
2150         public function delete() {
2151                 global $wgUser, $wgOut, $wgRequest;
2152
2153                 $confirm = $wgRequest->wasPosted() &&
2154                                 $wgUser->matchEditToken( $wgRequest->getVal( 'wpEditToken' ) );
2155
2156                 $this->DeleteReasonList = $wgRequest->getText( 'wpDeleteReasonList', 'other' );
2157                 $this->DeleteReason = $wgRequest->getText( 'wpReason' );
2158
2159                 $reason = $this->DeleteReasonList;
2160
2161                 if( $reason != 'other' && $this->DeleteReason != '' ) {
2162                         // Entry from drop down menu + additional comment
2163                         $reason .= wfMsgForContent( 'colon-separator' ) . $this->DeleteReason;
2164                 } elseif( $reason == 'other' ) {
2165                         $reason = $this->DeleteReason;
2166                 }
2167                 # Flag to hide all contents of the archived revisions
2168                 $suppress = $wgRequest->getVal( 'wpSuppress' ) && $wgUser->isAllowed( 'suppressrevision' );
2169
2170                 # This code desperately needs to be totally rewritten
2171
2172                 # Read-only check...
2173                 if( wfReadOnly() ) {
2174                         $wgOut->readOnlyPage();
2175                         return;
2176                 }
2177
2178                 # Check permissions
2179                 $permission_errors = $this->mTitle->getUserPermissionsErrors( 'delete', $wgUser );
2180
2181                 if( count( $permission_errors ) > 0 ) {
2182                         $wgOut->showPermissionsErrorPage( $permission_errors );
2183                         return;
2184                 }
2185
2186                 $wgOut->setPagetitle( wfMsg( 'delete-confirm', $this->mTitle->getPrefixedText() ) );
2187
2188                 # Better double-check that it hasn't been deleted yet!
2189                 $dbw = wfGetDB( DB_MASTER );
2190                 $conds = $this->mTitle->pageCond();
2191                 $latest = $dbw->selectField( 'page', 'page_latest', $conds, __METHOD__ );
2192                 if( $latest === false ) {
2193                         $wgOut->showFatalError( wfMsgExt( 'cannotdelete', array( 'parse' ) ) );
2194                         $wgOut->addHTML( Xml::element( 'h2', null, LogPage::logName( 'delete' ) ) );
2195                         LogEventsList::showLogExtract( $wgOut, 'delete', $this->mTitle->getPrefixedText() );
2196                         return;
2197                 }
2198
2199                 # Hack for big sites
2200                 $bigHistory = $this->isBigDeletion();
2201                 if( $bigHistory && !$this->mTitle->userCan( 'bigdelete' ) ) {
2202                         global $wgLang, $wgDeleteRevisionsLimit;
2203                         $wgOut->wrapWikiMsg( "<div class='error'>\n$1</div>\n",
2204                                 array( 'delete-toobig', $wgLang->formatNum( $wgDeleteRevisionsLimit ) ) );
2205                         return;
2206                 }
2207
2208                 if( $confirm ) {
2209                         $this->doDelete( $reason, $suppress );
2210                         if( $wgRequest->getCheck( 'wpWatch' ) ) {
2211                                 $this->doWatch();
2212                         } elseif( $this->mTitle->userIsWatching() ) {
2213                                 $this->doUnwatch();
2214                         }
2215                         return;
2216                 }
2217
2218                 // Generate deletion reason
2219                 $hasHistory = false;
2220                 if( !$reason ) $reason = $this->generateReason($hasHistory);
2221
2222                 // If the page has a history, insert a warning
2223                 if( $hasHistory && !$confirm ) {
2224                         $skin = $wgUser->getSkin();
2225                         $wgOut->addHTML( '<strong>' . wfMsgExt( 'historywarning', array( 'parseinline' ) ) . ' ' . $skin->historyLink() . '</strong>' );
2226                         if( $bigHistory ) {
2227                                 global $wgLang, $wgDeleteRevisionsLimit;
2228                                 $wgOut->wrapWikiMsg( "<div class='error'>\n$1</div>\n",
2229                                         array( 'delete-warning-toobig', $wgLang->formatNum( $wgDeleteRevisionsLimit ) ) );
2230                         }
2231                 }
2232
2233                 return $this->confirmDelete( $reason );
2234         }
2235
2236         /**
2237          * @return bool whether or not the page surpasses $wgDeleteRevisionsLimit revisions
2238          */
2239         public function isBigDeletion() {
2240                 global $wgDeleteRevisionsLimit;
2241                 if( $wgDeleteRevisionsLimit ) {
2242                         $revCount = $this->estimateRevisionCount();
2243                         return $revCount > $wgDeleteRevisionsLimit;
2244                 }
2245                 return false;
2246         }
2247
2248         /**
2249          * @return int approximate revision count
2250          */
2251         public function estimateRevisionCount() {
2252                 $dbr = wfGetDB( DB_SLAVE );
2253                 // For an exact count...
2254                 //return $dbr->selectField( 'revision', 'COUNT(*)',
2255                 //      array( 'rev_page' => $this->getId() ), __METHOD__ );
2256                 return $dbr->estimateRowCount( 'revision', '*',
2257                         array( 'rev_page' => $this->getId() ), __METHOD__ );
2258         }
2259
2260         /**
2261          * Get the last N authors
2262          * @param $num Integer: number of revisions to get
2263          * @param $revLatest String: the latest rev_id, selected from the master (optional)
2264          * @return array Array of authors, duplicates not removed
2265          */
2266         public function getLastNAuthors( $num, $revLatest = 0 ) {
2267                 wfProfileIn( __METHOD__ );
2268                 // First try the slave
2269                 // If that doesn't have the latest revision, try the master
2270                 $continue = 2;
2271                 $db = wfGetDB( DB_SLAVE );
2272                 do {
2273                         $res = $db->select( array( 'page', 'revision' ),
2274                                 array( 'rev_id', 'rev_user_text' ),
2275                                 array(
2276                                         'page_namespace' => $this->mTitle->getNamespace(),
2277                                         'page_title' => $this->mTitle->getDBkey(),
2278                                         'rev_page = page_id'
2279                                 ), __METHOD__, $this->getSelectOptions( array(
2280                                         'ORDER BY' => 'rev_timestamp DESC',
2281                                         'LIMIT' => $num
2282                                 ) )
2283                         );
2284                         if( !$res ) {
2285                                 wfProfileOut( __METHOD__ );
2286                                 return array();
2287                         }
2288                         $row = $db->fetchObject( $res );
2289                         if( $continue == 2 && $revLatest && $row->rev_id != $revLatest ) {
2290                                 $db = wfGetDB( DB_MASTER );
2291                                 $continue--;
2292                         } else {
2293                                 $continue = 0;
2294                         }
2295                 } while ( $continue );
2296
2297                 $authors = array( $row->rev_user_text );
2298                 while ( $row = $db->fetchObject( $res ) ) {
2299                         $authors[] = $row->rev_user_text;
2300                 }
2301                 wfProfileOut( __METHOD__ );
2302                 return $authors;
2303         }
2304
2305         /**
2306          * Output deletion confirmation dialog
2307          * @param $reason String: prefilled reason
2308          */
2309         public function confirmDelete( $reason ) {
2310                 global $wgOut, $wgUser;
2311
2312                 wfDebug( "Article::confirmDelete\n" );
2313
2314                 $wgOut->setSubtitle( wfMsgHtml( 'delete-backlink', $wgUser->getSkin()->makeKnownLinkObj( $this->mTitle ) ) );
2315                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
2316                 $wgOut->addWikiMsg( 'confirmdeletetext' );
2317
2318                 if( $wgUser->isAllowed( 'suppressrevision' ) ) {
2319                         $suppress = "<tr id=\"wpDeleteSuppressRow\" name=\"wpDeleteSuppressRow\">
2320                                         <td></td>
2321                                         <td class='mw-input'>" .
2322                                                 Xml::checkLabel( wfMsg( 'revdelete-suppress' ),
2323                                                         'wpSuppress', 'wpSuppress', false, array( 'tabindex' => '4' ) ) .
2324                                         "</td>
2325                                 </tr>";
2326                 } else {
2327                         $suppress = '';
2328                 }
2329                 $checkWatch = $wgUser->getBoolOption( 'watchdeletion' ) || $this->mTitle->userIsWatching();
2330
2331                 $form = Xml::openElement( 'form', array( 'method' => 'post',
2332                         'action' => $this->mTitle->getLocalURL( 'action=delete' ), 'id' => 'deleteconfirm' ) ) .
2333                         Xml::openElement( 'fieldset', array( 'id' => 'mw-delete-table' ) ) .
2334                         Xml::tags( 'legend', null, wfMsgExt( 'delete-legend', array( 'parsemag', 'escapenoentities' ) ) ) .
2335                         Xml::openElement( 'table', array( 'id' => 'mw-deleteconfirm-table' ) ) .
2336                         "<tr id=\"wpDeleteReasonListRow\">
2337                                 <td class='mw-label'>" .
2338                                         Xml::label( wfMsg( 'deletecomment' ), 'wpDeleteReasonList' ) .
2339                                 "</td>
2340                                 <td class='mw-input'>" .
2341                                         Xml::listDropDown( 'wpDeleteReasonList',
2342                                                 wfMsgForContent( 'deletereason-dropdown' ),
2343                                                 wfMsgForContent( 'deletereasonotherlist' ), '', 'wpReasonDropDown', 1 ) .
2344                                 "</td>
2345                         </tr>
2346                         <tr id=\"wpDeleteReasonRow\">
2347                                 <td class='mw-label'>" .
2348                                         Xml::label( wfMsg( 'deleteotherreason' ), 'wpReason' ) .
2349                                 "</td>
2350                                 <td class='mw-input'>" .
2351                                         Xml::input( 'wpReason', 60, $reason, array( 'type' => 'text', 'maxlength' => '255',
2352                                                 'tabindex' => '2', 'id' => 'wpReason' ) ) .
2353                                 "</td>
2354                         </tr>
2355                         <tr>
2356                                 <td></td>
2357                                 <td class='mw-input'>" .
2358                                         Xml::checkLabel( wfMsg( 'watchthis' ),
2359                                                 'wpWatch', 'wpWatch', $checkWatch, array( 'tabindex' => '3' ) ) .
2360                                 "</td>
2361                         </tr>
2362                         $suppress
2363                         <tr>
2364                                 <td></td>
2365                                 <td class='mw-submit'>" .
2366                                         Xml::submitButton( wfMsg( 'deletepage' ),
2367                                                 array( 'name' => 'wpConfirmB', 'id' => 'wpConfirmB', 'tabindex' => '5' ) ) .
2368                                 "</td>
2369                         </tr>" .
2370                         Xml::closeElement( 'table' ) .
2371                         Xml::closeElement( 'fieldset' ) .
2372                         Xml::hidden( 'wpEditToken', $wgUser->editToken() ) .
2373                         Xml::closeElement( 'form' );
2374
2375                         if( $wgUser->isAllowed( 'editinterface' ) ) {
2376                                 $skin = $wgUser->getSkin();
2377                                 $link = $skin->makeLink ( 'MediaWiki:Deletereason-dropdown', wfMsgHtml( 'delete-edit-reasonlist' ) );
2378                                 $form .= '<p class="mw-delete-editreasons">' . $link . '</p>';
2379                         }
2380
2381                 $wgOut->addHTML( $form );
2382                 LogEventsList::showLogExtract( $wgOut, 'delete', $this->mTitle->getPrefixedText() );
2383         }
2384
2385         /**
2386          * Perform a deletion and output success or failure messages
2387          */
2388         public function doDelete( $reason, $suppress = false ) {
2389                 global $wgOut, $wgUser;
2390                 $id = $this->mTitle->getArticleID( GAID_FOR_UPDATE );
2391
2392                 $error = '';
2393                 if( wfRunHooks('ArticleDelete', array(&$this, &$wgUser, &$reason, &$error)) ) {
2394                         if( $this->doDeleteArticle( $reason, $suppress, $id ) ) {
2395                                 $deleted = $this->mTitle->getPrefixedText();
2396
2397                                 $wgOut->setPagetitle( wfMsg( 'actioncomplete' ) );
2398                                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
2399
2400                                 $loglink = '[[Special:Log/delete|' . wfMsgNoTrans( 'deletionlog' ) . ']]';
2401
2402                                 $wgOut->addWikiMsg( 'deletedtext', $deleted, $loglink );
2403                                 $wgOut->returnToMain( false );
2404                                 wfRunHooks('ArticleDeleteComplete', array(&$this, &$wgUser, $reason, $id));
2405                         } else {
2406                                 if( $error == '' ) {
2407                                         $wgOut->showFatalError( wfMsgExt( 'cannotdelete', array( 'parse' ) ) );
2408                                         $wgOut->addHTML( Xml::element( 'h2', null, LogPage::logName( 'delete' ) ) );
2409                                         LogEventsList::showLogExtract( $wgOut, 'delete', $this->mTitle->getPrefixedText() );
2410                                 } else {
2411                                         $wgOut->showFatalError( $error );
2412                                 }
2413                         }
2414                 }
2415         }
2416
2417         /**
2418          * Back-end article deletion
2419          * Deletes the article with database consistency, writes logs, purges caches
2420          * Returns success
2421          */
2422         public function doDeleteArticle( $reason, $suppress = false, $id = 0 ) {
2423                 global $wgUseSquid, $wgDeferredUpdateList;
2424                 global $wgUseTrackbacks;
2425
2426                 wfDebug( __METHOD__."\n" );
2427
2428                 $dbw = wfGetDB( DB_MASTER );
2429                 $ns = $this->mTitle->getNamespace();
2430                 $t = $this->mTitle->getDBkey();
2431                 $id = $id ? $id : $this->mTitle->getArticleID( GAID_FOR_UPDATE );
2432
2433                 if( $t == '' || $id == 0 ) {
2434                         return false;
2435                 }
2436
2437                 $u = new SiteStatsUpdate( 0, 1, -(int)$this->isCountable( $this->getRawText() ), -1 );
2438                 array_push( $wgDeferredUpdateList, $u );
2439
2440                 // Bitfields to further suppress the content
2441                 if( $suppress ) {
2442                         $bitfield = 0;
2443                         // This should be 15...
2444                         $bitfield |= Revision::DELETED_TEXT;
2445                         $bitfield |= Revision::DELETED_COMMENT;
2446                         $bitfield |= Revision::DELETED_USER;
2447                         $bitfield |= Revision::DELETED_RESTRICTED;
2448                 } else {
2449                         $bitfield = 'rev_deleted';
2450                 }
2451
2452                 $dbw->begin();
2453                 // For now, shunt the revision data into the archive table.
2454                 // Text is *not* removed from the text table; bulk storage
2455                 // is left intact to avoid breaking block-compression or
2456                 // immutable storage schemes.
2457                 //
2458                 // For backwards compatibility, note that some older archive
2459                 // table entries will have ar_text and ar_flags fields still.
2460                 //
2461                 // In the future, we may keep revisions and mark them with
2462                 // the rev_deleted field, which is reserved for this purpose.
2463                 $dbw->insertSelect( 'archive', array( 'page', 'revision' ),
2464                         array(
2465                                 'ar_namespace'  => 'page_namespace',
2466                                 'ar_title'      => 'page_title',
2467                                 'ar_comment'    => 'rev_comment',
2468                                 'ar_user'       => 'rev_user',
2469                                 'ar_user_text'  => 'rev_user_text',
2470                                 'ar_timestamp'  => 'rev_timestamp',
2471                                 'ar_minor_edit' => 'rev_minor_edit',
2472                                 'ar_rev_id'     => 'rev_id',
2473                                 'ar_text_id'    => 'rev_text_id',
2474                                 'ar_text'       => '\'\'', // Be explicit to appease
2475                                 'ar_flags'      => '\'\'', // MySQL's "strict mode"...
2476                                 'ar_len'        => 'rev_len',
2477                                 'ar_page_id'    => 'page_id',
2478                                 'ar_deleted'    => $bitfield
2479                         ), array(
2480                                 'page_id' => $id,
2481                                 'page_id = rev_page'
2482                         ), __METHOD__
2483                 );
2484
2485                 # Delete restrictions for it
2486                 $dbw->delete( 'page_restrictions', array ( 'pr_page' => $id ), __METHOD__ );
2487
2488                 # Now that it's safely backed up, delete it
2489                 $dbw->delete( 'page', array( 'page_id' => $id ), __METHOD__);
2490                 $ok = ( $dbw->affectedRows() > 0 ); // getArticleId() uses slave, could be laggy
2491                 if( !$ok ) {
2492                         $dbw->rollback();
2493                         return false;
2494                 }
2495
2496                 # If using cascading deletes, we can skip some explicit deletes
2497                 if( !$dbw->cascadingDeletes() ) {
2498                         $dbw->delete( 'revision', array( 'rev_page' => $id ), __METHOD__ );
2499
2500                         if($wgUseTrackbacks)
2501                                 $dbw->delete( 'trackbacks', array( 'tb_page' => $id ), __METHOD__ );
2502
2503                         # Delete outgoing links
2504                         $dbw->delete( 'pagelinks', array( 'pl_from' => $id ) );
2505                         $dbw->delete( 'imagelinks', array( 'il_from' => $id ) );
2506                         $dbw->delete( 'categorylinks', array( 'cl_from' => $id ) );
2507                         $dbw->delete( 'templatelinks', array( 'tl_from' => $id ) );
2508                         $dbw->delete( 'externallinks', array( 'el_from' => $id ) );
2509                         $dbw->delete( 'langlinks', array( 'll_from' => $id ) );
2510                         $dbw->delete( 'redirect', array( 'rd_from' => $id ) );
2511                 }
2512
2513                 # If using cleanup triggers, we can skip some manual deletes
2514                 if( !$dbw->cleanupTriggers() ) {
2515                         # Clean up recentchanges entries...
2516                         $dbw->delete( 'recentchanges',
2517                                 array( 'rc_type != '.RC_LOG,
2518                                         'rc_namespace' => $this->mTitle->getNamespace(),
2519                                         'rc_title' => $this->mTitle->getDBKey() ),
2520                                 __METHOD__ );
2521                         $dbw->delete( 'recentchanges',
2522                                 array( 'rc_type != '.RC_LOG, 'rc_cur_id' => $id ),
2523                                 __METHOD__ );
2524                 }
2525
2526                 # Clear caches
2527                 Article::onArticleDelete( $this->mTitle );
2528
2529                 # Fix category table counts
2530                 $cats = array();
2531                 $res = $dbw->select( 'categorylinks', 'cl_to', array( 'cl_from' => $id ), __METHOD__ );
2532                 foreach( $res as $row ) {
2533                         $cats []= $row->cl_to;
2534                 }
2535                 $this->updateCategoryCounts( array(), $cats );
2536
2537                 # Clear the cached article id so the interface doesn't act like we exist
2538                 $this->mTitle->resetArticleID( 0 );
2539                 $this->mTitle->mArticleID = 0;
2540
2541                 # Log the deletion, if the page was suppressed, log it at Oversight instead
2542                 $logtype = $suppress ? 'suppress' : 'delete';
2543                 $log = new LogPage( $logtype );
2544
2545                 # Make sure logging got through
2546                 $log->addEntry( 'delete', $this->mTitle, $reason, array() );
2547
2548                 $dbw->commit();
2549
2550                 return true;
2551         }
2552
2553         /**
2554          * Roll back the most recent consecutive set of edits to a page
2555          * from the same user; fails if there are no eligible edits to
2556          * roll back to, e.g. user is the sole contributor. This function
2557          * performs permissions checks on $wgUser, then calls commitRollback()
2558          * to do the dirty work
2559          *
2560          * @param $fromP String: Name of the user whose edits to rollback.
2561          * @param $summary String: Custom summary. Set to default summary if empty.
2562          * @param $token String: Rollback token.
2563          * @param $bot Boolean: If true, mark all reverted edits as bot.
2564          *
2565          * @param $resultDetails Array: contains result-specific array of additional values
2566          *    'alreadyrolled' : 'current' (rev)
2567          *    success        : 'summary' (str), 'current' (rev), 'target' (rev)
2568          *
2569          * @return array of errors, each error formatted as
2570          *   array(messagekey, param1, param2, ...).
2571          * On success, the array is empty.  This array can also be passed to
2572          * OutputPage::showPermissionsErrorPage().
2573          */
2574         public function doRollback( $fromP, $summary, $token, $bot, &$resultDetails ) {
2575                 global $wgUser;
2576                 $resultDetails = null;
2577
2578                 # Check permissions
2579                 $editErrors = $this->mTitle->getUserPermissionsErrors( 'edit', $wgUser );
2580                 $rollbackErrors = $this->mTitle->getUserPermissionsErrors( 'rollback', $wgUser );
2581                 $errors = array_merge( $editErrors, wfArrayDiff2( $rollbackErrors, $editErrors ) );
2582
2583                 if( !$wgUser->matchEditToken( $token, array( $this->mTitle->getPrefixedText(), $fromP ) ) )
2584                         $errors[] = array( 'sessionfailure' );
2585
2586                 if( $wgUser->pingLimiter( 'rollback' ) || $wgUser->pingLimiter() ) {
2587                         $errors[] = array( 'actionthrottledtext' );
2588                 }
2589                 # If there were errors, bail out now
2590                 if( !empty( $errors ) )
2591                         return $errors;
2592
2593                 return $this->commitRollback($fromP, $summary, $bot, $resultDetails);
2594         }
2595
2596         /**
2597          * Backend implementation of doRollback(), please refer there for parameter
2598          * and return value documentation
2599          *
2600          * NOTE: This function does NOT check ANY permissions, it just commits the
2601          * rollback to the DB Therefore, you should only call this function direct-
2602          * ly if you want to use custom permissions checks. If you don't, use
2603          * doRollback() instead.
2604          */
2605         public function commitRollback($fromP, $summary, $bot, &$resultDetails) {
2606                 global $wgUseRCPatrol, $wgUser, $wgLang;
2607                 $dbw = wfGetDB( DB_MASTER );
2608
2609                 if( wfReadOnly() ) {
2610                         return array( array( 'readonlytext' ) );
2611                 }
2612
2613                 # Get the last editor
2614                 $current = Revision::newFromTitle( $this->mTitle );
2615                 if( is_null( $current ) ) {
2616                         # Something wrong... no page?
2617                         return array(array('notanarticle'));
2618                 }
2619
2620                 $from = str_replace( '_', ' ', $fromP );
2621                 if( $from != $current->getUserText() ) {
2622                         $resultDetails = array( 'current' => $current );
2623                         return array(array('alreadyrolled',
2624                                 htmlspecialchars($this->mTitle->getPrefixedText()),
2625                                 htmlspecialchars($fromP),
2626                                 htmlspecialchars($current->getUserText())
2627                         ));
2628                 }
2629
2630                 # Get the last edit not by this guy
2631                 $user = intval( $current->getUser() );
2632                 $user_text = $dbw->addQuotes( $current->getUserText() );
2633                 $s = $dbw->selectRow( 'revision',
2634                         array( 'rev_id', 'rev_timestamp', 'rev_deleted' ),
2635                         array(  'rev_page' => $current->getPage(),
2636                                 "rev_user != {$user} OR rev_user_text != {$user_text}"
2637                         ), __METHOD__,
2638                         array(  'USE INDEX' => 'page_timestamp',
2639                                 'ORDER BY'  => 'rev_timestamp DESC' )
2640                         );
2641                 if( $s === false ) {
2642                         # No one else ever edited this page
2643                         return array(array('cantrollback'));
2644                 } else if( $s->rev_deleted & REVISION::DELETED_TEXT || $s->rev_deleted & REVISION::DELETED_USER ) {
2645                         # Only admins can see this text
2646                         return array(array('notvisiblerev'));
2647                 }
2648
2649                 $set = array();
2650                 if( $bot && $wgUser->isAllowed('markbotedits') ) {
2651                         # Mark all reverted edits as bot
2652                         $set['rc_bot'] = 1;
2653                 }
2654                 if( $wgUseRCPatrol ) {
2655                         # Mark all reverted edits as patrolled
2656                         $set['rc_patrolled'] = 1;
2657                 }
2658
2659                 if( $set ) {
2660                         $dbw->update( 'recentchanges', $set,
2661                                         array( /* WHERE */
2662                                                 'rc_cur_id' => $current->getPage(),
2663                                                 'rc_user_text' => $current->getUserText(),
2664                                                 "rc_timestamp > '{$s->rev_timestamp}'",
2665                                         ), __METHOD__
2666                                 );
2667                 }
2668
2669                 # Generate the edit summary if necessary
2670                 $target = Revision::newFromId( $s->rev_id );
2671                 if( empty( $summary ) ){
2672                         $summary = wfMsgForContent( 'revertpage' );
2673                 }
2674
2675                 # Allow the custom summary to use the same args as the default message
2676                 $args = array(
2677                         $target->getUserText(), $from, $s->rev_id,
2678                         $wgLang->timeanddate(wfTimestamp(TS_MW, $s->rev_timestamp), true),
2679                         $current->getId(), $wgLang->timeanddate($current->getTimestamp())
2680                 );
2681                 $summary = wfMsgReplaceArgs( $summary, $args );
2682
2683                 # Save
2684                 $flags = EDIT_UPDATE;
2685
2686                 if( $wgUser->isAllowed('minoredit') )
2687                         $flags |= EDIT_MINOR;
2688
2689                 if( $bot && ($wgUser->isAllowed('markbotedits') || $wgUser->isAllowed('bot')) )
2690                         $flags |= EDIT_FORCE_BOT;
2691                 # Actually store the edit
2692                 $status = $this->doEdit( $target->getText(), $summary, $flags, $target->getId() );
2693                 if( !empty( $status->value['revision'] ) ) {
2694                         $revId = $status->value['revision']->getId();
2695                 } else {
2696                         $revId = false;
2697                 }
2698
2699                 wfRunHooks( 'ArticleRollbackComplete', array( $this, $wgUser, $target, $current ) );
2700
2701                 $resultDetails = array(
2702                         'summary' => $summary,
2703                         'current' => $current,
2704                         'target' => $target,
2705                         'newid' => $revId
2706                 );
2707                 return array();
2708         }
2709
2710         /**
2711          * User interface for rollback operations
2712          */
2713         public function rollback() {
2714                 global $wgUser, $wgOut, $wgRequest, $wgUseRCPatrol;
2715                 $details = null;
2716
2717                 $result = $this->doRollback(
2718                         $wgRequest->getVal( 'from' ),
2719                         $wgRequest->getText( 'summary' ),
2720                         $wgRequest->getVal( 'token' ),
2721                         $wgRequest->getBool( 'bot' ),
2722                         $details
2723                 );
2724
2725                 if( in_array( array( 'actionthrottledtext' ), $result ) ) {
2726                         $wgOut->rateLimited();
2727                         return;
2728                 }
2729                 if( isset( $result[0][0] ) && ( $result[0][0] == 'alreadyrolled' || $result[0][0] == 'cantrollback' ) ) {
2730                         $wgOut->setPageTitle( wfMsg( 'rollbackfailed' ) );
2731                         $errArray = $result[0];
2732                         $errMsg = array_shift( $errArray );
2733                         $wgOut->addWikiMsgArray( $errMsg, $errArray );
2734                         if( isset( $details['current'] ) ){
2735                                 $current = $details['current'];
2736                                 if( $current->getComment() != '' ) {
2737                                         $wgOut->addWikiMsgArray( 'editcomment', array(
2738                                                 $wgUser->getSkin()->formatComment( $current->getComment() ) ), array( 'replaceafter' ) );
2739                                 }
2740                         }
2741                         return;
2742                 }
2743                 # Display permissions errors before read-only message -- there's no
2744                 # point in misleading the user into thinking the inability to rollback
2745                 # is only temporary.
2746                 if( !empty( $result ) && $result !== array( array( 'readonlytext' ) ) ) {
2747                         # array_diff is completely broken for arrays of arrays, sigh.  Re-
2748                         # move any 'readonlytext' error manually.
2749                         $out = array();
2750                         foreach( $result as $error ) {
2751                                 if( $error != array( 'readonlytext' ) ) {
2752                                         $out []= $error;
2753                                 }
2754                         }
2755                         $wgOut->showPermissionsErrorPage( $out );
2756                         return;
2757                 }
2758                 if( $result == array( array( 'readonlytext' ) ) ) {
2759                         $wgOut->readOnlyPage();
2760                         return;
2761                 }
2762
2763                 $current = $details['current'];
2764                 $target = $details['target'];
2765                 $newId = $details['newid'];
2766                 $wgOut->setPageTitle( wfMsg( 'actioncomplete' ) );
2767                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
2768                 $old = $wgUser->getSkin()->userLink( $current->getUser(), $current->getUserText() )
2769                         . $wgUser->getSkin()->userToolLinks( $current->getUser(), $current->getUserText() );
2770                 $new = $wgUser->getSkin()->userLink( $target->getUser(), $target->getUserText() )
2771                         . $wgUser->getSkin()->userToolLinks( $target->getUser(), $target->getUserText() );
2772                 $wgOut->addHTML( wfMsgExt( 'rollback-success', array( 'parse', 'replaceafter' ), $old, $new ) );
2773                 $wgOut->returnToMain( false, $this->mTitle );
2774
2775                 if( !$wgRequest->getBool( 'hidediff', false ) && !$wgUser->getBoolOption( 'norollbackdiff', false ) ) {
2776                         $de = new DifferenceEngine( $this->mTitle, $current->getId(), $newId, false, true );
2777                         $de->showDiff( '', '' );
2778                 }
2779         }
2780
2781
2782         /**
2783          * Do standard deferred updates after page view
2784          */
2785         public function viewUpdates() {
2786                 global $wgDeferredUpdateList, $wgDisableCounters, $wgUser;
2787                 # Don't update page view counters on views from bot users (bug 14044)
2788                 if( !$wgDisableCounters && !$wgUser->isAllowed('bot') && $this->getID() ) {
2789                         Article::incViewCount( $this->getID() );
2790                         $u = new SiteStatsUpdate( 1, 0, 0 );
2791                         array_push( $wgDeferredUpdateList, $u );
2792                 }
2793                 # Update newtalk / watchlist notification status
2794                 $wgUser->clearNotification( $this->mTitle );
2795         }
2796
2797         /**
2798          * Prepare text which is about to be saved.
2799          * Returns a stdclass with source, pst and output members
2800          */
2801         public function prepareTextForEdit( $text, $revid=null ) {
2802                 if( $this->mPreparedEdit && $this->mPreparedEdit->newText == $text && $this->mPreparedEdit->revid == $revid) {
2803                         // Already prepared
2804                         return $this->mPreparedEdit;
2805                 }
2806                 global $wgParser;
2807                 $edit = (object)array();
2808                 $edit->revid = $revid;
2809                 $edit->newText = $text;
2810                 $edit->pst = $this->preSaveTransform( $text );
2811                 $options = new ParserOptions;
2812                 $options->setTidy( true );
2813                 $options->enableLimitReport();
2814                 $edit->output = $wgParser->parse( $edit->pst, $this->mTitle, $options, true, true, $revid );
2815                 $edit->oldText = $this->getContent();
2816                 $this->mPreparedEdit = $edit;
2817                 return $edit;
2818         }
2819
2820         /**
2821          * Do standard deferred updates after page edit.
2822          * Update links tables, site stats, search index and message cache.
2823          * Purges pages that include this page if the text was changed here.
2824          * Every 100th edit, prune the recent changes table.
2825          *
2826          * @private
2827          * @param $text New text of the article
2828          * @param $summary Edit summary
2829          * @param $minoredit Minor edit
2830          * @param $timestamp_of_pagechange Timestamp associated with the page change
2831          * @param $newid rev_id value of the new revision
2832          * @param $changed Whether or not the content actually changed
2833          */
2834         public function editUpdates( $text, $summary, $minoredit, $timestamp_of_pagechange, $newid, $changed = true ) {
2835                 global $wgDeferredUpdateList, $wgMessageCache, $wgUser, $wgParser, $wgEnableParserCache;
2836
2837                 wfProfileIn( __METHOD__ );
2838
2839                 # Parse the text
2840                 # Be careful not to double-PST: $text is usually already PST-ed once
2841                 if( !$this->mPreparedEdit || $this->mPreparedEdit->output->getFlag( 'vary-revision' ) ) {
2842                         wfDebug( __METHOD__ . ": No prepared edit or vary-revision is set...\n" );
2843                         $editInfo = $this->prepareTextForEdit( $text, $newid );
2844                 } else {
2845                         wfDebug( __METHOD__ . ": No vary-revision, using prepared edit...\n" );
2846                         $editInfo = $this->mPreparedEdit;
2847                 }
2848
2849                 # Save it to the parser cache
2850                 if( $wgEnableParserCache ) {
2851                         $parserCache = ParserCache::singleton();
2852                         $parserCache->save( $editInfo->output, $this, $wgUser );
2853                 }
2854
2855                 # Update the links tables
2856                 $u = new LinksUpdate( $this->mTitle, $editInfo->output, false );
2857                 $u->setRecursiveTouch( $changed ); // refresh/invalidate including pages too
2858                 $u->doUpdate();
2859
2860                 wfRunHooks( 'ArticleEditUpdates', array( &$this, &$editInfo, $changed ) );
2861
2862                 if( wfRunHooks( 'ArticleEditUpdatesDeleteFromRecentchanges', array( &$this ) ) ) {
2863                         if( 0 == mt_rand( 0, 99 ) ) {
2864                                 // Flush old entries from the `recentchanges` table; we do this on
2865                                 // random requests so as to avoid an increase in writes for no good reason
2866                                 global $wgRCMaxAge;
2867                                 $dbw = wfGetDB( DB_MASTER );
2868                                 $cutoff = $dbw->timestamp( time() - $wgRCMaxAge );
2869                                 $recentchanges = $dbw->tableName( 'recentchanges' );
2870                                 $sql = "DELETE FROM $recentchanges WHERE rc_timestamp < '{$cutoff}'";
2871                                 $dbw->query( $sql );
2872                         }
2873                 }
2874
2875                 $id = $this->getID();
2876                 $title = $this->mTitle->getPrefixedDBkey();
2877                 $shortTitle = $this->mTitle->getDBkey();
2878
2879                 if( 0 == $id ) {
2880                         wfProfileOut( __METHOD__ );
2881                         return;
2882                 }
2883
2884                 $u = new SiteStatsUpdate( 0, 1, $this->mGoodAdjustment, $this->mTotalAdjustment );
2885                 array_push( $wgDeferredUpdateList, $u );
2886                 $u = new SearchUpdate( $id, $title, $text );
2887                 array_push( $wgDeferredUpdateList, $u );
2888
2889                 # If this is another user's talk page, update newtalk
2890                 # Don't do this if $changed = false otherwise some idiot can null-edit a
2891                 # load of user talk pages and piss people off, nor if it's a minor edit
2892                 # by a properly-flagged bot.
2893                 if( $this->mTitle->getNamespace() == NS_USER_TALK && $shortTitle != $wgUser->getTitleKey() && $changed
2894                         && !( $minoredit && $wgUser->isAllowed( 'nominornewtalk' ) ) ) {
2895                         if( wfRunHooks('ArticleEditUpdateNewTalk', array( &$this ) ) ) {
2896                                 $other = User::newFromName( $shortTitle, false );
2897                                 if( !$other ) {
2898                                         wfDebug( __METHOD__.": invalid username\n" );
2899                                 } elseif( User::isIP( $shortTitle ) ) {
2900                                         // An anonymous user
2901                                         $other->setNewtalk( true );
2902                                 } elseif( $other->isLoggedIn() ) {
2903                                         $other->setNewtalk( true );
2904                                 } else {
2905                                         wfDebug( __METHOD__. ": don't need to notify a nonexistent user\n" );
2906                                 }
2907                         }
2908                 }
2909
2910                 if( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
2911                         $wgMessageCache->replace( $shortTitle, $text );
2912                 }
2913
2914                 wfProfileOut( __METHOD__ );
2915         }
2916
2917         /**
2918          * Perform article updates on a special page creation.
2919          *
2920          * @param $rev Revision object
2921          *
2922          * @todo This is a shitty interface function. Kill it and replace the
2923          * other shitty functions like editUpdates and such so it's not needed
2924          * anymore.
2925          */
2926         public function createUpdates( $rev ) {
2927                 $this->mGoodAdjustment = $this->isCountable( $rev->getText() );
2928                 $this->mTotalAdjustment = 1;
2929                 $this->editUpdates( $rev->getText(), $rev->getComment(),
2930                         $rev->isMinor(), wfTimestamp(), $rev->getId(), true );
2931         }
2932
2933         /**
2934          * Generate the navigation links when browsing through an article revisions
2935          * It shows the information as:
2936          *   Revision as of \<date\>; view current revision
2937          *   \<- Previous version | Next Version -\>
2938          *
2939          * @param $oldid String: revision ID of this article revision
2940          */
2941         public function setOldSubtitle( $oldid = 0 ) {
2942                 global $wgLang, $wgOut, $wgUser;
2943
2944                 if( !wfRunHooks( 'DisplayOldSubtitle', array( &$this, &$oldid ) ) ) {
2945                         return;
2946                 }
2947
2948                 $revision = Revision::newFromId( $oldid );
2949
2950                 $current = ( $oldid == $this->mLatest );
2951                 $td = $wgLang->timeanddate( $this->mTimestamp, true );
2952                 $sk = $wgUser->getSkin();
2953                 $lnk = $current
2954                         ? wfMsgHtml( 'currentrevisionlink' )
2955                         : $sk->makeKnownLinkObj( $this->mTitle, wfMsgHtml( 'currentrevisionlink' ) );
2956                 $curdiff = $current
2957                         ? wfMsgHtml( 'diff' )
2958                         : $sk->makeKnownLinkObj( $this->mTitle, wfMsgHtml( 'diff' ), 'diff=cur&oldid='.$oldid );
2959                 $prev = $this->mTitle->getPreviousRevisionID( $oldid ) ;
2960                 $prevlink = $prev
2961                         ? $sk->makeKnownLinkObj( $this->mTitle, wfMsgHtml( 'previousrevision' ), 'direction=prev&oldid='.$oldid )
2962                         : wfMsgHtml( 'previousrevision' );
2963                 $prevdiff = $prev
2964                         ? $sk->makeKnownLinkObj( $this->mTitle, wfMsgHtml( 'diff' ), 'diff=prev&oldid='.$oldid )
2965                         : wfMsgHtml( 'diff' );
2966                 $nextlink = $current
2967                         ? wfMsgHtml( 'nextrevision' )
2968                         : $sk->makeKnownLinkObj( $this->mTitle, wfMsgHtml( 'nextrevision' ), 'direction=next&oldid='.$oldid );
2969                 $nextdiff = $current
2970                         ? wfMsgHtml( 'diff' )
2971                         : $sk->makeKnownLinkObj( $this->mTitle, wfMsgHtml( 'diff' ), 'diff=next&oldid='.$oldid );
2972
2973                 $cdel='';
2974                 if( $wgUser->isAllowed( 'deleterevision' ) ) {
2975                         $revdel = SpecialPage::getTitleFor( 'Revisiondelete' );
2976                         if( $revision->isCurrent() ) {
2977                         // We don't handle top deleted edits too well
2978                                 $cdel = wfMsgHtml( 'rev-delundel' );
2979                         } else if( !$revision->userCan( Revision::DELETED_RESTRICTED ) ) {
2980                         // If revision was hidden from sysops
2981                                 $cdel = wfMsgHtml( 'rev-delundel' );
2982                         } else {
2983                                 $cdel = $sk->makeKnownLinkObj( $revdel,
2984                                         wfMsgHtml('rev-delundel'),
2985                                         'target=' . urlencode( $this->mTitle->getPrefixedDbkey() ) .
2986                                         '&oldid=' . urlencode( $oldid ) );
2987                                 // Bolden oversighted content
2988                                 if( $revision->isDeleted( Revision::DELETED_RESTRICTED ) )
2989                                         $cdel = "<strong>$cdel</strong>";
2990                         }
2991                         $cdel = "(<small>$cdel</small>) ";
2992                 }
2993                 # Show user links if allowed to see them. Normally they
2994                 # are hidden regardless, but since we can already see the text here...
2995                 $userlinks = $sk->revUserTools( $revision, false );
2996
2997                 $m = wfMsg( 'revision-info-current' );
2998                 $infomsg = $current && !wfEmptyMsg( 'revision-info-current', $m ) && $m != '-'
2999                         ? 'revision-info-current'
3000                         : 'revision-info';
3001
3002                 $r = "\n\t\t\t\t<div id=\"mw-{$infomsg}\">" . wfMsgExt( $infomsg, array( 'parseinline', 'replaceafter' ), $td, $userlinks, $revision->getID() ) . "</div>\n" .
3003
3004                      "\n\t\t\t\t<div id=\"mw-revision-nav\">" . $cdel . wfMsgHtml( 'revision-nav', $prevdiff,
3005                                 $prevlink, $lnk, $curdiff, $nextlink, $nextdiff ) . "</div>\n\t\t\t";
3006                 $wgOut->setSubtitle( $r );
3007         }
3008
3009         /**
3010          * This function is called right before saving the wikitext,
3011          * so we can do things like signatures and links-in-context.
3012          *
3013          * @param $text String
3014          */
3015         public function preSaveTransform( $text ) {
3016                 global $wgParser, $wgUser;
3017                 return $wgParser->preSaveTransform( $text, $this->mTitle, $wgUser, ParserOptions::newFromUser( $wgUser ) );
3018         }
3019
3020         /* Caching functions */
3021
3022         /**
3023          * checkLastModified returns true if it has taken care of all
3024          * output to the client that is necessary for this request.
3025          * (that is, it has sent a cached version of the page)
3026          */
3027         protected function tryFileCache() {
3028                 static $called = false;
3029                 if( $called ) {
3030                         wfDebug( "Article::tryFileCache(): called twice!?\n" );
3031                         return false;
3032                 }
3033                 $called = true;
3034                 if( $this->isFileCacheable() ) {
3035                         $cache = new HTMLFileCache( $this->mTitle );
3036                         if( $cache->isFileCacheGood( $this->mTouched ) ) {
3037                                 wfDebug( "Article::tryFileCache(): about to load file\n" );
3038                                 $cache->loadFromFileCache();
3039                                 return true;
3040                         } else {
3041                                 wfDebug( "Article::tryFileCache(): starting buffer\n" );
3042                                 ob_start( array(&$cache, 'saveToFileCache' ) );
3043                         }
3044                 } else {
3045                         wfDebug( "Article::tryFileCache(): not cacheable\n" );
3046                 }
3047                 return false;
3048         }
3049
3050         /**
3051          * Check if the page can be cached
3052          * @return bool
3053          */
3054         public function isFileCacheable() {
3055                 $cacheable = false;
3056                 if( HTMLFileCache::useFileCache() ) {
3057                         $cacheable = $this->getID() && !$this->mRedirectedFrom;
3058                         // Extension may have reason to disable file caching on some pages.
3059                         if( $cacheable ) {
3060                                 $cacheable = wfRunHooks( 'IsFileCacheable', array( &$this ) );
3061                         }
3062                 }
3063                 return $cacheable;
3064         }
3065
3066         /**
3067          * Loads page_touched and returns a value indicating if it should be used
3068          *
3069          */
3070         public function checkTouched() {
3071                 if( !$this->mDataLoaded ) {
3072                         $this->loadPageData();
3073                 }
3074                 return !$this->mIsRedirect;
3075         }
3076
3077         /**
3078          * Get the page_touched field
3079          */
3080         public function getTouched() {
3081                 # Ensure that page data has been loaded
3082                 if( !$this->mDataLoaded ) {
3083                         $this->loadPageData();
3084                 }
3085                 return $this->mTouched;
3086         }
3087
3088         /**
3089          * Get the page_latest field
3090          */
3091         public function getLatest() {
3092                 if( !$this->mDataLoaded ) {
3093                         $this->loadPageData();
3094                 }
3095                 return $this->mLatest;
3096         }
3097
3098         /**
3099          * Edit an article without doing all that other stuff
3100          * The article must already exist; link tables etc
3101          * are not updated, caches are not flushed.
3102          *
3103          * @param $text String: text submitted
3104          * @param $comment String: comment submitted
3105          * @param $minor Boolean: whereas it's a minor modification
3106          */
3107         public function quickEdit( $text, $comment = '', $minor = 0 ) {
3108                 wfProfileIn( __METHOD__ );
3109
3110                 $dbw = wfGetDB( DB_MASTER );
3111                 $revision = new Revision( array(
3112                         'page'       => $this->getId(),
3113                         'text'       => $text,
3114                         'comment'    => $comment,
3115                         'minor_edit' => $minor ? 1 : 0,
3116                         ) );
3117                 $revision->insertOn( $dbw );
3118                 $this->updateRevisionOn( $dbw, $revision );
3119
3120                 wfRunHooks( 'NewRevisionFromEditComplete', array($this, $revision, false, $wgUser) );
3121
3122                 wfProfileOut( __METHOD__ );
3123         }
3124
3125         /**
3126          * Used to increment the view counter
3127          *
3128          * @param $id Integer: article id
3129          */
3130         public static function incViewCount( $id ) {
3131                 $id = intval( $id );
3132                 global $wgHitcounterUpdateFreq, $wgDBtype;
3133
3134                 $dbw = wfGetDB( DB_MASTER );
3135                 $pageTable = $dbw->tableName( 'page' );
3136                 $hitcounterTable = $dbw->tableName( 'hitcounter' );
3137                 $acchitsTable = $dbw->tableName( 'acchits' );
3138
3139                 if( $wgHitcounterUpdateFreq <= 1 ) {
3140                         $dbw->query( "UPDATE $pageTable SET page_counter = page_counter + 1 WHERE page_id = $id" );
3141                         return;
3142                 }
3143
3144                 # Not important enough to warrant an error page in case of failure
3145                 $oldignore = $dbw->ignoreErrors( true );
3146
3147                 $dbw->query( "INSERT INTO $hitcounterTable (hc_id) VALUES ({$id})" );
3148
3149                 $checkfreq = intval( $wgHitcounterUpdateFreq/25 + 1 );
3150                 if( (rand() % $checkfreq != 0) or ($dbw->lastErrno() != 0) ){
3151                         # Most of the time (or on SQL errors), skip row count check
3152                         $dbw->ignoreErrors( $oldignore );
3153                         return;
3154                 }
3155
3156                 $res = $dbw->query("SELECT COUNT(*) as n FROM $hitcounterTable");
3157                 $row = $dbw->fetchObject( $res );
3158                 $rown = intval( $row->n );
3159                 if( $rown >= $wgHitcounterUpdateFreq ){
3160                         wfProfileIn( 'Article::incViewCount-collect' );
3161                         $old_user_abort = ignore_user_abort( true );
3162
3163                         if($wgDBtype == 'mysql')
3164                                 $dbw->query("LOCK TABLES $hitcounterTable WRITE");
3165                         $tabletype = $wgDBtype == 'mysql' ? "ENGINE=HEAP " : '';
3166                         $dbw->query("CREATE TEMPORARY TABLE $acchitsTable $tabletype AS ".
3167                                 "SELECT hc_id,COUNT(*) AS hc_n FROM $hitcounterTable ".
3168                                 'GROUP BY hc_id');
3169                         $dbw->query("DELETE FROM $hitcounterTable");
3170                         if($wgDBtype == 'mysql') {
3171                                 $dbw->query('UNLOCK TABLES');
3172                                 $dbw->query("UPDATE $pageTable,$acchitsTable SET page_counter=page_counter + hc_n ".
3173                                         'WHERE page_id = hc_id');
3174                         }
3175                         else {
3176                                 $dbw->query("UPDATE $pageTable SET page_counter=page_counter + hc_n ".
3177                                         "FROM $acchitsTable WHERE page_id = hc_id");
3178                         }
3179                         $dbw->query("DROP TABLE $acchitsTable");
3180
3181                         ignore_user_abort( $old_user_abort );
3182                         wfProfileOut( 'Article::incViewCount-collect' );
3183                 }
3184                 $dbw->ignoreErrors( $oldignore );
3185         }
3186
3187         /**#@+
3188          * The onArticle*() functions are supposed to be a kind of hooks
3189          * which should be called whenever any of the specified actions
3190          * are done.
3191          *
3192          * This is a good place to put code to clear caches, for instance.
3193          *
3194          * This is called on page move and undelete, as well as edit
3195          *
3196          * @param $title a title object
3197          */
3198
3199         public static function onArticleCreate( $title ) {
3200                 # Update existence markers on article/talk tabs...
3201                 if( $title->isTalkPage() ) {
3202                         $other = $title->getSubjectPage();
3203                 } else {
3204                         $other = $title->getTalkPage();
3205                 }
3206                 $other->invalidateCache();
3207                 $other->purgeSquid();
3208
3209                 $title->touchLinks();
3210                 $title->purgeSquid();
3211                 $title->deleteTitleProtection();
3212         }
3213
3214         public static function onArticleDelete( $title ) {
3215                 global $wgMessageCache;
3216                 # Update existence markers on article/talk tabs...
3217                 if( $title->isTalkPage() ) {
3218                         $other = $title->getSubjectPage();
3219                 } else {
3220                         $other = $title->getTalkPage();
3221                 }
3222                 $other->invalidateCache();
3223                 $other->purgeSquid();
3224
3225                 $title->touchLinks();
3226                 $title->purgeSquid();
3227
3228                 # File cache
3229                 HTMLFileCache::clearFileCache( $title );
3230
3231                 # Messages
3232                 if( $title->getNamespace() == NS_MEDIAWIKI ) {
3233                         $wgMessageCache->replace( $title->getDBkey(), false );
3234                 }
3235                 # Images
3236                 if( $title->getNamespace() == NS_FILE ) {
3237                         $update = new HTMLCacheUpdate( $title, 'imagelinks' );
3238                         $update->doUpdate();
3239                 }
3240                 # User talk pages
3241                 if( $title->getNamespace() == NS_USER_TALK ) {
3242                         $user = User::newFromName( $title->getText(), false );
3243                         $user->setNewtalk( false );
3244                 }
3245         }
3246
3247         /**
3248          * Purge caches on page update etc
3249          */
3250         public static function onArticleEdit( $title, $transclusions = 'transclusions' ) {
3251                 global $wgDeferredUpdateList;
3252
3253                 // Invalidate caches of articles which include this page
3254                 if( $transclusions !== 'skiptransclusions' )
3255                         $wgDeferredUpdateList[] = new HTMLCacheUpdate( $title, 'templatelinks' );
3256
3257                 // Invalidate the caches of all pages which redirect here
3258                 $wgDeferredUpdateList[] = new HTMLCacheUpdate( $title, 'redirect' );
3259
3260                 # Purge squid for this page only
3261                 $title->purgeSquid();
3262
3263                 # Clear file cache for this page only
3264                 HTMLFileCache::clearFileCache( $title );
3265         }
3266
3267         /**#@-*/
3268
3269         /**
3270          * Overriden by ImagePage class, only present here to avoid a fatal error
3271          * Called for ?action=revert
3272          */
3273         public function revert() {
3274                 global $wgOut;
3275                 $wgOut->showErrorPage( 'nosuchaction', 'nosuchactiontext' );
3276         }
3277
3278         /**
3279          * Info about this page
3280          * Called for ?action=info when $wgAllowPageInfo is on.
3281          */
3282         public function info() {
3283                 global $wgLang, $wgOut, $wgAllowPageInfo, $wgUser;
3284
3285                 if( !$wgAllowPageInfo ) {
3286                         $wgOut->showErrorPage( 'nosuchaction', 'nosuchactiontext' );
3287                         return;
3288                 }
3289
3290                 $page = $this->mTitle->getSubjectPage();
3291
3292                 $wgOut->setPagetitle( $page->getPrefixedText() );
3293                 $wgOut->setPageTitleActionText( wfMsg( 'info_short' ) );
3294                 $wgOut->setSubtitle( wfMsgHtml( 'infosubtitle' ) );
3295
3296                 if( !$this->mTitle->exists() ) {
3297                         $wgOut->addHTML( '<div class="noarticletext">' );
3298                         if( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
3299                                 // This doesn't quite make sense; the user is asking for
3300                                 // information about the _page_, not the message... -- RC
3301                                 $wgOut->addHTML( htmlspecialchars( wfMsgWeirdKey( $this->mTitle->getText() ) ) );
3302                         } else {
3303                                 $msg = $wgUser->isLoggedIn()
3304                                         ? 'noarticletext'
3305                                         : 'noarticletextanon';
3306                                 $wgOut->addHTML( wfMsgExt( $msg, 'parse' ) );
3307                         }
3308                         $wgOut->addHTML( '</div>' );
3309                 } else {
3310                         $dbr = wfGetDB( DB_SLAVE );
3311                         $wl_clause = array(
3312                                 'wl_title'     => $page->getDBkey(),
3313                                 'wl_namespace' => $page->getNamespace() );
3314                         $numwatchers = $dbr->selectField(
3315                                 'watchlist',
3316                                 'COUNT(*)',
3317                                 $wl_clause,
3318                                 __METHOD__,
3319                                 $this->getSelectOptions() );
3320
3321                         $pageInfo = $this->pageCountInfo( $page );
3322                         $talkInfo = $this->pageCountInfo( $page->getTalkPage() );
3323
3324                         $wgOut->addHTML( "<ul><li>" . wfMsg("numwatchers", $wgLang->formatNum( $numwatchers ) ) . '</li>' );
3325                         $wgOut->addHTML( "<li>" . wfMsg('numedits', $wgLang->formatNum( $pageInfo['edits'] ) ) . '</li>');
3326                         if( $talkInfo ) {
3327                                 $wgOut->addHTML( '<li>' . wfMsg("numtalkedits", $wgLang->formatNum( $talkInfo['edits'] ) ) . '</li>');
3328                         }
3329                         $wgOut->addHTML( '<li>' . wfMsg("numauthors", $wgLang->formatNum( $pageInfo['authors'] ) ) . '</li>' );
3330                         if( $talkInfo ) {
3331                                 $wgOut->addHTML( '<li>' . wfMsg('numtalkauthors', $wgLang->formatNum( $talkInfo['authors'] ) ) . '</li>' );
3332                         }
3333                         $wgOut->addHTML( '</ul>' );
3334                 }
3335         }
3336
3337         /**
3338          * Return the total number of edits and number of unique editors
3339          * on a given page. If page does not exist, returns false.
3340          *
3341          * @param $title Title object
3342          * @return array
3343          */
3344         protected function pageCountInfo( $title ) {
3345                 $id = $title->getArticleId();
3346                 if( $id == 0 ) {
3347                         return false;
3348                 }
3349                 $dbr = wfGetDB( DB_SLAVE );
3350                 $rev_clause = array( 'rev_page' => $id );
3351                 $edits = $dbr->selectField(
3352                         'revision',
3353                         'COUNT(rev_page)',
3354                         $rev_clause,
3355                         __METHOD__,
3356                         $this->getSelectOptions()
3357                 );
3358                 $authors = $dbr->selectField(
3359                         'revision',
3360                         'COUNT(DISTINCT rev_user_text)',
3361                         $rev_clause,
3362                         __METHOD__,
3363                         $this->getSelectOptions()
3364                 );
3365                 return array( 'edits' => $edits, 'authors' => $authors );
3366         }
3367
3368         /**
3369          * Return a list of templates used by this article.
3370          * Uses the templatelinks table
3371          *
3372          * @return Array of Title objects
3373          */
3374         public function getUsedTemplates() {
3375                 $result = array();
3376                 $id = $this->mTitle->getArticleID();
3377                 if( $id == 0 ) {
3378                         return array();
3379                 }
3380                 $dbr = wfGetDB( DB_SLAVE );
3381                 $res = $dbr->select( array( 'templatelinks' ),
3382                         array( 'tl_namespace', 'tl_title' ),
3383                         array( 'tl_from' => $id ),
3384                         __METHOD__ );
3385                 if( $res !== false ) {
3386                         foreach( $res as $row ) {
3387                                 $result[] = Title::makeTitle( $row->tl_namespace, $row->tl_title );
3388                         }
3389                 }
3390                 $dbr->freeResult( $res );
3391                 return $result;
3392         }
3393
3394         /**
3395          * Returns a list of hidden categories this page is a member of.
3396          * Uses the page_props and categorylinks tables.
3397          *
3398          * @return Array of Title objects
3399          */
3400         public function getHiddenCategories() {
3401                 $result = array();
3402                 $id = $this->mTitle->getArticleID();
3403                 if( $id == 0 ) {
3404                         return array();
3405                 }
3406                 $dbr = wfGetDB( DB_SLAVE );
3407                 $res = $dbr->select( array( 'categorylinks', 'page_props', 'page' ),
3408                         array( 'cl_to' ),
3409                         array( 'cl_from' => $id, 'pp_page=page_id', 'pp_propname' => 'hiddencat',
3410                                 'page_namespace' => NS_CATEGORY, 'page_title=cl_to'),
3411                         __METHOD__ );
3412                 if( $res !== false ) {
3413                         foreach( $res as $row ) {
3414                                 $result[] = Title::makeTitle( NS_CATEGORY, $row->cl_to );
3415                         }
3416                 }
3417                 $dbr->freeResult( $res );
3418                 return $result;
3419         }
3420
3421         /**
3422         * Return an applicable autosummary if one exists for the given edit.
3423         * @param $oldtext String: the previous text of the page.
3424         * @param $newtext String: The submitted text of the page.
3425         * @param $flags Bitmask: a bitmask of flags submitted for the edit.
3426         * @return string An appropriate autosummary, or an empty string.
3427         */
3428         public static function getAutosummary( $oldtext, $newtext, $flags ) {
3429                 # Decide what kind of autosummary is needed.
3430
3431                 # Redirect autosummaries
3432                 $ot = Title::newFromRedirect( $oldtext );
3433                 $rt = Title::newFromRedirect( $newtext );
3434                 if( is_object( $rt ) && ( !is_object( $ot ) || !$rt->equals( $ot ) || $ot->getFragment() != $rt->getFragment() ) ) {
3435                         return wfMsgForContent( 'autoredircomment', $rt->getFullText() );
3436                 }
3437
3438                 # New page autosummaries
3439                 if( $flags & EDIT_NEW && strlen( $newtext ) ) {
3440                         # If they're making a new article, give its text, truncated, in the summary.
3441                         global $wgContLang;
3442                         $truncatedtext = $wgContLang->truncate(
3443                                 str_replace("\n", ' ', $newtext),
3444                                 max( 0, 200 - strlen( wfMsgForContent( 'autosumm-new' ) ) ),
3445                                 '...' );
3446                         return wfMsgForContent( 'autosumm-new', $truncatedtext );
3447                 }
3448
3449                 # Blanking autosummaries
3450                 if( $oldtext != '' && $newtext == '' ) {
3451                         return wfMsgForContent( 'autosumm-blank' );
3452                 } elseif( strlen( $oldtext ) > 10 * strlen( $newtext ) && strlen( $newtext ) < 500) {
3453                         # Removing more than 90% of the article
3454                         global $wgContLang;
3455                         $truncatedtext = $wgContLang->truncate(
3456                                 $newtext,
3457                                 max( 0, 200 - strlen( wfMsgForContent( 'autosumm-replace' ) ) ),
3458                                 '...'
3459                         );
3460                         return wfMsgForContent( 'autosumm-replace', $truncatedtext );
3461                 }
3462
3463                 # If we reach this point, there's no applicable autosummary for our case, so our
3464                 # autosummary is empty.
3465                 return '';
3466         }
3467
3468         /**
3469          * Add the primary page-view wikitext to the output buffer
3470          * Saves the text into the parser cache if possible.
3471          * Updates templatelinks if it is out of date.
3472          *
3473          * @param $text String
3474          * @param $cache Boolean
3475          */
3476         public function outputWikiText( $text, $cache = true ) {
3477                 global $wgParser, $wgUser, $wgOut, $wgEnableParserCache, $wgUseFileCache;
3478
3479                 $popts = $wgOut->parserOptions();
3480                 $popts->setTidy(true);
3481                 $popts->enableLimitReport();
3482                 $parserOutput = $wgParser->parse( $text, $this->mTitle,
3483                         $popts, true, true, $this->getRevIdFetched() );
3484                 $popts->setTidy(false);
3485                 $popts->enableLimitReport( false );
3486                 if( $wgEnableParserCache && $cache && $this && $parserOutput->getCacheTime() != -1 ) {
3487                         $parserCache = ParserCache::singleton();
3488                         $parserCache->save( $parserOutput, $this, $wgUser );
3489                 }
3490                 // Make sure file cache is not used on uncacheable content.
3491                 // Output that has magic words in it can still use the parser cache
3492                 // (if enabled), though it will generally expire sooner.
3493                 if( $parserOutput->getCacheTime() == -1 || $parserOutput->containsOldMagic() ) {
3494                         $wgUseFileCache = false;
3495                 }
3496
3497                 if( $this->isCurrent() && !wfReadOnly() && $this->mTitle->areRestrictionsCascading() ) {
3498                         // templatelinks table may have become out of sync,
3499                         // especially if using variable-based transclusions.
3500                         // For paranoia, check if things have changed and if
3501                         // so apply updates to the database. This will ensure
3502                         // that cascaded protections apply as soon as the changes
3503                         // are visible.
3504
3505                         # Get templates from templatelinks
3506                         $id = $this->mTitle->getArticleID();
3507
3508                         $tlTemplates = array();
3509
3510                         $dbr = wfGetDB( DB_SLAVE );
3511                         $res = $dbr->select( array( 'templatelinks' ),
3512                                 array( 'tl_namespace', 'tl_title' ),
3513                                 array( 'tl_from' => $id ),
3514                                 __METHOD__ );
3515
3516                         global $wgContLang;
3517
3518                         if( $res !== false ) {
3519                                 foreach( $res as $row ) {
3520                                         $tlTemplates[] = $wgContLang->getNsText( $row->tl_namespace ) . ':' . $row->tl_title ;
3521                                 }
3522                         }
3523
3524                         # Get templates from parser output.
3525                         $poTemplates_allns = $parserOutput->getTemplates();
3526
3527                         $poTemplates = array ();
3528                         foreach ( $poTemplates_allns as $ns_templates ) {
3529                                 $poTemplates = array_merge( $poTemplates, $ns_templates );
3530                         }
3531
3532                         # Get the diff
3533                         $templates_diff = array_diff( $poTemplates, $tlTemplates );
3534
3535                         if( count( $templates_diff ) > 0 ) {
3536                                 # Whee, link updates time.
3537                                 $u = new LinksUpdate( $this->mTitle, $parserOutput );
3538                                 $u->doUpdate();
3539                         }
3540                 }
3541
3542                 $wgOut->addParserOutput( $parserOutput );
3543         }
3544
3545         /**
3546          * Update all the appropriate counts in the category table, given that
3547          * we've added the categories $added and deleted the categories $deleted.
3548          *
3549          * @param $added array   The names of categories that were added
3550          * @param $deleted array The names of categories that were deleted
3551          * @return null
3552          */
3553         public function updateCategoryCounts( $added, $deleted ) {
3554                 $ns = $this->mTitle->getNamespace();
3555                 $dbw = wfGetDB( DB_MASTER );
3556
3557                 # First make sure the rows exist.  If one of the "deleted" ones didn't
3558                 # exist, we might legitimately not create it, but it's simpler to just
3559                 # create it and then give it a negative value, since the value is bogus
3560                 # anyway.
3561                 #
3562                 # Sometimes I wish we had INSERT ... ON DUPLICATE KEY UPDATE.
3563                 $insertCats = array_merge( $added, $deleted );
3564                 if( !$insertCats ) {
3565                         # Okay, nothing to do
3566                         return;
3567                 }
3568                 $insertRows = array();
3569                 foreach( $insertCats as $cat ) {
3570                         $insertRows[] = array( 'cat_title' => $cat );
3571                 }
3572                 $dbw->insert( 'category', $insertRows, __METHOD__, 'IGNORE' );
3573
3574                 $addFields    = array( 'cat_pages = cat_pages + 1' );
3575                 $removeFields = array( 'cat_pages = cat_pages - 1' );
3576                 if( $ns == NS_CATEGORY ) {
3577                         $addFields[]    = 'cat_subcats = cat_subcats + 1';
3578                         $removeFields[] = 'cat_subcats = cat_subcats - 1';
3579                 } elseif( $ns == NS_FILE ) {
3580                         $addFields[]    = 'cat_files = cat_files + 1';
3581                         $removeFields[] = 'cat_files = cat_files - 1';
3582                 }
3583
3584                 if( $added ) {
3585                         $dbw->update(
3586                                 'category',
3587                                 $addFields,
3588                                 array( 'cat_title' => $added ),
3589                                 __METHOD__
3590                         );
3591                 }
3592                 if( $deleted ) {
3593                         $dbw->update(
3594                                 'category',
3595                                 $removeFields,
3596                                 array( 'cat_title' => $deleted ),
3597                                 __METHOD__
3598                         );
3599                 }
3600         }
3601 }