includes/Article.php

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