includes/Article.php

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