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