includes/Article.php

   1 <?php
   2 /**
   3  * File for articles
   4  * @package MediaWiki
   5  */
   6
   7 /**
   8  * Need the CacheManager to be loaded
   9  */
  10 require_once( 'CacheManager.php' );
  11 require_once( 'Revision.php' );
  12
  13 $wgArticleCurContentFields = false;
  14 $wgArticleOldContentFields = false;
  15
  16 /**
  17  * Class representing a Wikipedia article and history.
  18  *
  19  * See design.doc for an overview.
  20  * Note: edit user interface and cache support functions have been
  21  * moved to separate EditPage and CacheManager classes.
  22  *
  23  * @package MediaWiki
  24  */
  25 class Article {
  26         /**#@+
  27          * @access private
  28          */
  29         var $mContent, $mContentLoaded;
  30         var $mUser, $mTimestamp, $mUserText;
  31         var $mCounter, $mComment, $mCountAdjustment;
  32         var $mMinorEdit, $mRedirectedFrom;
  33         var $mTouched, $mFileCache, $mTitle;
  34         var $mId, $mTable;
  35         var $mForUpdate;
  36         var $mOldId;
  37         /**#@-*/
  38
  39         /**
  40          * Constructor and clear the article
  41          * @param mixed &$title
  42          */
  43         function Article( &$title ) {
  44                 $this->mTitle =& $title;
  45                 $this->clear();
  46         }
  47
  48         /**
  49          * get the title object of the article
  50          * @public
  51          */
  52         function getTitle() {
  53                 return $this->mTitle;
  54         }
  55
  56         /**
  57           * Clear the object
  58           * @private
  59           */
  60         function clear() {
  61                 $this->mContentLoaded = false;
  62                 $this->mCurID = $this->mUser = $this->mCounter = -1; # Not loaded
  63                 $this->mRedirectedFrom = $this->mUserText =
  64                 $this->mTimestamp = $this->mComment = $this->mFileCache = '';
  65                 $this->mCountAdjustment = 0;
  66                 $this->mTouched = '19700101000000';
  67                 $this->mForUpdate = false;
  68         }
  69
  70         /**
  71          * Note that getContent/loadContent may follow redirects if
  72          * not told otherwise, and so may cause a change to mTitle.
  73          *
  74          * @param $noredir
  75          * @return Return the text of this revision
  76         */
  77         function getContent( $noredir ) {
  78                 global $wgRequest;
  79
  80                 # Get variables from query string :P
  81                 $action = $wgRequest->getText( 'action', 'view' );
  82                 $section = $wgRequest->getText( 'section' );
  83
  84                 $fname =  'Article::getContent';
  85                 wfProfileIn( $fname );
  86
  87                 if ( 0 == $this->getID() ) {
  88                         if ( 'edit' == $action ) {
  89                                 wfProfileOut( $fname );
  90                                 return ''; # was "newarticletext", now moved above the box)
  91                         }
  92                         wfProfileOut( $fname );
  93                         return wfMsg( 'noarticletext' );
  94                 } else {
  95                         $this->loadContent( $noredir );
  96                         # check if we're displaying a [[User talk:x.x.x.x]] anonymous talk page
  97                         if ( $this->mTitle->getNamespace() == NS_USER_TALK &&
  98                           preg_match('/^\d{1,3}\.\d{1,3}.\d{1,3}\.\d{1,3}$/',$this->mTitle->getText()) &&
  99                           $action=='view'
 100                         ) {
 101                                 wfProfileOut( $fname );
 102                                 return $this->mContent . "\n" .wfMsg('anontalkpagetext');
 103                         } else {
 104                                 if($action=='edit') {
 105                                         if($section!='') {
 106                                                 if($section=='new') {
 107                                                         wfProfileOut( $fname );
 108                                                         return '';
 109                                                 }
 110
 111                                                 # strip NOWIKI etc. to avoid confusion (true-parameter causes HTML
 112                                                 # comments to be stripped as well)
 113                                                 $rv=$this->getSection($this->mContent,$section);
 114                                                 wfProfileOut( $fname );
 115                                                 return $rv;
 116                                         }
 117                                 }
 118                                 wfProfileOut( $fname );
 119                                 return $this->mContent;
 120                         }
 121                 }
 122         }
 123
 124         /**
 125          * This function returns the text of a section, specified by a number ($section).
 126          * A section is text under a heading like == Heading == or <h1>Heading</h1>, or
 127          * the first section before any such heading (section 0).
 128          *
 129          * If a section contains subsections, these are also returned.
 130          *
 131          * @param string $text text to look in
 132          * @param integer $section section number
 133          * @return string text of the requested section
 134          */
 135         function getSection($text,$section) {
 136
 137                 # strip NOWIKI etc. to avoid confusion (true-parameter causes HTML
 138                 # comments to be stripped as well)
 139                 $striparray=array();
 140                 $parser=new Parser();
 141                 $parser->mOutputType=OT_WIKI;
 142                 $striptext=$parser->strip($text, $striparray, true);
 143
 144                 # now that we can be sure that no pseudo-sections are in the source,
 145                 # split it up by section
 146                 $secs =
 147                   preg_split(
 148                   '/(^=+.+?=+|^<h[1-6].*?' . '>.*?<\/h[1-6].*?' . '>)(?!\S)/mi',
 149                   $striptext, -1,
 150                   PREG_SPLIT_DELIM_CAPTURE);
 151                 if($section==0) {
 152                         $rv=$secs[0];
 153                 } else {
 154                         $headline=$secs[$section*2-1];
 155                         preg_match( '/^(=+).+?=+|^<h([1-6]).*?' . '>.*?<\/h[1-6].*?' . '>(?!\S)/mi',$headline,$matches);
 156                         $hlevel=$matches[1];
 157
 158                         # translate wiki heading into level
 159                         if(strpos($hlevel,'=')!==false) {
 160                                 $hlevel=strlen($hlevel);
 161                         }
 162
 163                         $rv=$headline. $secs[$section*2];
 164                         $count=$section+1;
 165
 166                         $break=false;
 167                         while(!empty($secs[$count*2-1]) && !$break) {
 168
 169                                 $subheadline=$secs[$count*2-1];
 170                                 preg_match( '/^(=+).+?=+|^<h([1-6]).*?' . '>.*?<\/h[1-6].*?' . '>(?!\S)/mi',$subheadline,$matches);
 171                                 $subhlevel=$matches[1];
 172                                 if(strpos($subhlevel,'=')!==false) {
 173                                         $subhlevel=strlen($subhlevel);
 174                                 }
 175                                 if($subhlevel > $hlevel) {
 176                                         $rv.=$subheadline.$secs[$count*2];
 177                                 }
 178                                 if($subhlevel <= $hlevel) {
 179                                         $break=true;
 180                                 }
 181                                 $count++;
 182
 183                         }
 184                 }
 185                 # reinsert stripped tags
 186                 $rv=$parser->unstrip($rv,$striparray);
 187                 $rv=$parser->unstripNoWiki($rv,$striparray);
 188                 $rv=trim($rv);
 189                 return $rv;
 190
 191         }
 192
 193         /**
 194          * Return an array of the columns of the "cur"-table
 195          */
 196         function getContentFields() {
 197                 return $wgArticleContentFields = array(
 198                   'old_text','old_flags',
 199                   'rev_timestamp','rev_user', 'rev_user_text', 'rev_comment','page_counter',
 200                   'page_namespace', 'page_title', 'page_restrictions','page_touched','page_is_redirect' );
 201         }
 202
 203         /**
 204          * Return the oldid of the article that is to be shown.
 205          * For requests with a "direction", this is not the oldid of the
 206          * query
 207          */
 208         function getOldID() {
 209                 global $wgRequest, $wgOut;
 210                 static $lastid;
 211
 212                 if ( isset( $lastid ) ) {
 213                         return $lastid;
 214                 }
 215                 # Query variables :P
 216                 $oldid = $wgRequest->getVal( 'oldid' );
 217                 if ( isset( $oldid ) ) {
 218                         $oldid = IntVal( $oldid );
 219                         if ( $wgRequest->getVal( 'direction' ) == 'next' ) {
 220                                 $nextid = $this->mTitle->getNextRevisionID( $oldid );
 221                                 if ( $nextid  ) {
 222                                         $oldid = $nextid;
 223                                 } else {
 224                                         $wgOut->redirect( $this->mTitle->getFullURL( 'redirect=no' ) );
 225                                 }
 226                         } elseif ( $wgRequest->getVal( 'direction' ) == 'prev' ) {
 227                                 $previd = $this->mTitle->getPreviousRevisionID( $oldid );
 228                                 if ( $previd ) {
 229                                         $oldid = $previd;
 230                                 } else {
 231                                         # TODO
 232                                 }
 233                         }
 234                         $lastid = $oldid;
 235                 }
 236                 return @$oldid; # "@" to be able to return "unset" without PHP complaining
 237         }
 238
 239
 240         /**
 241          * Load the revision (including cur_text) into this object
 242          */
 243         function loadContent( $noredir = false ) {
 244                 global $wgOut, $wgRequest;
 245
 246                 if ( $this->mContentLoaded ) return;
 247
 248                 # Query variables :P
 249                 $oldid = $this->getOldID();
 250                 $redirect = $wgRequest->getVal( 'redirect' );
 251
 252                 $fname = 'Article::loadContent';
 253
 254                 # Pre-fill content with error message so that if something
 255                 # fails we'll have something telling us what we intended.
 256
 257                 $t = $this->mTitle->getPrefixedText();
 258
 259                 $noredir = $noredir || ($wgRequest->getVal( 'redirect' ) == 'no');
 260                 $this->mOldId = $oldid;
 261                 $this->fetchContent( $oldid, $noredir, true );
 262         }
 263
 264         /**
 265          * Get text of an article from database
 266          * @param int $oldid 0 for whatever the latest revision is
 267          * @param bool $noredir Set to true to avoid following redirects
 268          * @param bool $globalTitle Set to true to change the global $wgTitle object when following redirects or other unexpected title changes
 269          * @return string
 270          */
 271         function fetchContent( $oldid = 0, $noredir = false, $globalTitle = false ) {
 272                 if ( $this->mContentLoaded ) {
 273                         return $this->mContent;
 274                 }
 275                 $dbr =& $this->getDB();
 276                 $fname = 'Article::fetchContent';
 277
 278                 # Pre-fill content with error message so that if something
 279                 # fails we'll have something telling us what we intended.
 280                 $t = $this->mTitle->getPrefixedText();
 281                 if( $oldid ) {
 282                         $t .= ',oldid='.$oldid;
 283                 }
 284                 if( isset( $redirect ) ) {
 285                         $redirect = ($redirect == 'no') ? 'no' : 'yes';
 286                         $t .= ',redirect='.$redirect;
 287                 }
 288                 $this->mContent = wfMsg( 'missingarticle', $t );
 289
 290                 if( !$oldid ) {
 291                         # Retrieve current version
 292                         $id = $this->getID();
 293                         if ( 0 == $id ) {
 294                                 return false;
 295                         }
 296
 297                         $s = $dbr->selectRow( array( 'text', 'revision', 'page' ),
 298                                 $this->getContentFields(),
 299                                 "page_id='$id' AND rev_page=page_id AND rev_id=page_latest AND old_id=rev_id",
 300                                 $fname, $this->getSelectOptions() );
 301                 } else {
 302                         # Historical revision
 303                         $s = $dbr->selectRow( array( 'text', 'revision', 'page' ),
 304                                 $this->getContentFields(),
 305                                 "rev_page=page_id AND rev_id='$oldid' AND old_id=rev_id",
 306                                 $fname, $this->getSelectOptions() );
 307                 }
 308                 if ( $s === false ) {
 309                         return false;
 310                 }
 311
 312                 # If we got a redirect, follow it (unless we've been told
 313                 # not to by either the function parameter or the query
 314                 if ( !$oldid && !$noredir ) {
 315                         $rt = Title::newFromRedirect( Revision::getRevisionText( $s ) );
 316                         # process if title object is valid and not special:userlogout
 317                         if ( $rt && ! ( $rt->getNamespace() == NS_SPECIAL && $rt->getText() == 'Userlogout' ) ) {
 318                                 # Gotta hand redirects to special pages differently:
 319                                 # Fill the HTTP response "Location" header and ignore
 320                                 # the rest of the page we're on.
 321                                 if( $globalTitle ) {
 322                                         global $wgOut;
 323                                         if ( $rt->getInterwiki() != '' && $rt->isLocal() ) {
 324                                                 $wgOut->redirect( $rt->getFullURL() ) ;
 325                                                 return false;
 326                                         }
 327                                         if ( $rt->getNamespace() == NS_SPECIAL ) {
 328                                                 $wgOut->redirect( $rt->getFullURL() );
 329                                                 return false;
 330                                         }
 331                                 }
 332                                 $rid = $rt->getArticleID();
 333                                 if ( 0 != $rid ) {
 334                                         $redirRow = $dbr->selectRow( array( 'text', 'revision', 'page' ),
 335                                                 $this->getContentFields(),
 336                                                 "page_id='$rid' AND rev_page=page_id AND rev_id=page_latest AND old_id=rev_id",
 337                                                 $fname, $this->getSelectOptions() );
 338
 339                                         if ( $redirRow !== false ) {
 340                                                 $this->mRedirectedFrom = $this->mTitle->getPrefixedText();
 341                                                 $this->mTitle = $rt;
 342                                                 $s = $redirRow;
 343                                         }
 344                                 }
 345                         }
 346                 }
 347
 348                 # if the title's different from expected, update...
 349                 if( $globalTitle &&
 350                         ( $this->mTitle->getNamespace() != $s->page_namespace ||
 351                         $this->mTitle->getDBkey() != $s->page_title ) ) {
 352                         $oldTitle = Title::makeTitle( $s->page_namesapce, $s->page_title );
 353                         $this->mTitle = $oldTitle;
 354                         global $wgTitle;
 355                         $wgTitle = $oldTitle;
 356                 }
 357
 358                 # Back to the business at hand...
 359                 $this->mCounter = $s->page_counter;
 360                 $this->mTitle->mRestrictions = explode( ',', trim( $s->page_restrictions ) );
 361                 $this->mTitle->mRestrictionsLoaded = true;
 362                 $this->mTouched = wfTimestamp( TS_MW, $s->page_touched );
 363
 364                 $this->mContent = Revision::getRevisionText( $s );
 365
 366                 $this->mUser = $s->rev_user;
 367                 $this->mUserText = $s->rev_user_text;
 368                 $this->mComment = $s->rev_comment;
 369                 $this->mTimestamp = wfTimestamp( TS_MW, $s->rev_timestamp );
 370
 371                 $this->mContentLoaded = true;
 372                 return $this->mContent;
 373         }
 374
 375         /**
 376          * Gets the article text without using so many damn globals
 377          * Returns false on error
 378          *
 379          * @param integer $oldid
 380          */
 381         function getContentWithoutUsingSoManyDamnGlobals( $oldid = 0, $noredir = false ) {
 382                 return $this->fetchContent( $oldid, $noredir, false );
 383         }
 384
 385         /**
 386          * Read/write accessor to select FOR UPDATE
 387          */
 388         function forUpdate( $x = NULL ) {
 389                 return wfSetVar( $this->mForUpdate, $x );
 390         }
 391
 392         /**
 393          * Get the database which should be used for reads
 394          */
 395         function &getDB() {
 396                 #if ( $this->mForUpdate ) {
 397                         return wfGetDB( DB_MASTER );
 398                 #} else {
 399                 #       return wfGetDB( DB_SLAVE );
 400                 #}
 401         }
 402
 403         /**
 404          * Get options for all SELECT statements
 405          * Can pass an option array, to which the class-wide options will be appended
 406          */
 407         function getSelectOptions( $options = '' ) {
 408                 if ( $this->mForUpdate ) {
 409                         if ( is_array( $options ) ) {
 410                                 $options[] = 'FOR UPDATE';
 411                         } else {
 412                                 $options = 'FOR UPDATE';
 413                         }
 414                 }
 415                 return $options;
 416         }
 417
 418         /**
 419          * Return the Article ID
 420          */
 421         function getID() {
 422                 if( $this->mTitle ) {
 423                         return $this->mTitle->getArticleID();
 424                 } else {
 425                         return 0;
 426                 }
 427         }
 428
 429         /**
 430          * Get the view count for this article
 431          */
 432         function getCount() {
 433                 if ( -1 == $this->mCounter ) {
 434                         $id = $this->getID();
 435                         $dbr =& $this->getDB();
 436                         $this->mCounter = $dbr->selectField( 'page', 'page_counter', array( 'page_id' => $id ),
 437                                 'Article::getCount', $this->getSelectOptions() );
 438                 }
 439                 return $this->mCounter;
 440         }
 441
 442         /**
 443          * Would the given text make this article a "good" article (i.e.,
 444          * suitable for including in the article count)?
 445          * @param string $text Text to analyze
 446          * @return integer 1 if it can be counted else 0
 447          */
 448         function isCountable( $text ) {
 449                 global $wgUseCommaCount;
 450
 451                 if ( NS_MAIN != $this->mTitle->getNamespace() ) { return 0; }
 452                 if ( $this->isRedirect( $text ) ) { return 0; }
 453                 $token = ($wgUseCommaCount ? ',' : '[[' );
 454                 if ( false === strstr( $text, $token ) ) { return 0; }
 455                 return 1;
 456         }
 457
 458         /**
 459          * Tests if the article text represents a redirect
 460          */
 461         function isRedirect( $text = false ) {
 462                 if ( $text === false ) {
 463                         $this->loadContent();
 464                         $titleObj = Title::newFromRedirect( $this->mText );
 465                 } else {
 466                         $titleObj = Title::newFromRedirect( $text );
 467                 }
 468                 return $titleObj !== NULL;
 469         }
 470
 471         /**
 472          * Loads everything except the text
 473          * This isn't necessary for all uses, so it's only done if needed.
 474          * @private
 475          */
 476         function loadLastEdit() {
 477                 global $wgOut;
 478
 479                 if ( -1 != $this->mUser )
 480                         return;
 481
 482                 # New or non-existent articles have no user information
 483                 $id = $this->getID();
 484                 if ( 0 == $id ) return;
 485
 486                 $fname = 'Article::loadLastEdit';
 487
 488                 $dbr =& $this->getDB();
 489                 $s = $dbr->selectRow( array( 'revision', 'page') ,
 490                   array( 'rev_user','rev_user_text','rev_timestamp', 'rev_comment','rev_minor_edit' ),
 491                   array( 'page_id' => $id, 'page_latest=rev_id' ), $fname, $this->getSelectOptions() );
 492
 493                 if ( $s !== false ) {
 494                         $this->mUser = $s->rev_user;
 495                         $this->mUserText = $s->rev_user_text;
 496                         $this->mTimestamp = wfTimestamp(TS_MW,$s->rev_timestamp);
 497                         $this->mComment = $s->rev_comment;
 498                         $this->mMinorEdit = $s->rev_minor_edit;
 499                 }
 500         }
 501
 502         function getTimestamp() {
 503                 $this->loadLastEdit();
 504                 return $this->mTimestamp;
 505         }
 506
 507         function getUser() {
 508                 $this->loadLastEdit();
 509                 return $this->mUser;
 510         }
 511
 512         function getUserText() {
 513                 $this->loadLastEdit();
 514                 return $this->mUserText;
 515         }
 516
 517         function getComment() {
 518                 $this->loadLastEdit();
 519                 return $this->mComment;
 520         }
 521
 522         function getMinorEdit() {
 523                 $this->loadLastEdit();
 524                 return $this->mMinorEdit;
 525         }
 526
 527         function getContributors($limit = 0, $offset = 0) {
 528                 $fname = 'Article::getContributors';
 529
 530                 # XXX: this is expensive; cache this info somewhere.
 531
 532                 $title = $this->mTitle;
 533                 $contribs = array();
 534                 $dbr =& $this->getDB();
 535                 $revTable = $dbr->tableName( 'revision' );
 536                 $userTable = $dbr->tableName( 'user' );
 537                 $encDBkey = $dbr->addQuotes( $title->getDBkey() );
 538                 $ns = $title->getNamespace();
 539                 $user = $this->getUser();
 540                 $pageId = $this->getId();
 541
 542                 $sql = "SELECT rev_user, rev_user_text, user_real_name, MAX(rev_timestamp) as timestamp
 543                         FROM $revTable LEFT JOIN $userTable ON rev_user = user_id
 544                         WHERE rev_page = $pageId
 545                         AND rev_user != $user
 546                         GROUP BY rev_user, rev_user_text, user_real_name
 547                         ORDER BY timestamp DESC";
 548
 549                 if ($limit > 0) { $sql .= ' LIMIT '.$limit; }
 550                 $sql .= ' '. $this->getSelectOptions();
 551
 552                 $res = $dbr->query($sql, $fname);
 553
 554                 while ( $line = $dbr->fetchObject( $res ) ) {
 555                         $contribs[] = array($line->rev_user, $line->rev_user_text, $line->user_real_name);
 556                 }
 557
 558                 $dbr->freeResult($res);
 559                 return $contribs;
 560         }
 561
 562         /**
 563          * This is the default action of the script: just view the page of
 564          * the given title.
 565         */
 566         function view() {
 567                 global $wgUser, $wgOut, $wgRequest, $wgOnlySysopsCanPatrol, $wgLang;
 568                 global $wgLinkCache, $IP, $wgEnableParserCache, $wgStylePath, $wgUseRCPatrol;
 569                 global $wgEnotif;
 570                 $sk = $wgUser->getSkin();
 571
 572                 $fname = 'Article::view';
 573                 wfProfileIn( $fname );
 574                 # Get variables from query string
 575                 $oldid = $this->getOldID();
 576                 $diff = $wgRequest->getVal( 'diff' );
 577                 $rcid = $wgRequest->getVal( 'rcid' );
 578                 $rdfrom = $wgRequest->getVal( 'rdfrom' );
 579
 580                 $wgOut->setArticleFlag( true );
 581                 $wgOut->setRobotpolicy( 'index,follow' );
 582                 # If we got diff and oldid in the query, we want to see a
 583                 # diff page instead of the article.
 584
 585                 if ( !is_null( $diff ) ) {
 586                         require_once( 'DifferenceEngine.php' );
 587                         $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
 588                         $de = new DifferenceEngine( $oldid, $diff, $rcid );
 589                         $de->showDiffPage();
 590                         if( $diff == 0 ) {
 591                                 # Run view updates for current revision only
 592                                 $this->viewUpdates();
 593                         }
 594                         wfProfileOut( $fname );
 595                         return;
 596                 }
 597                 if ( empty( $oldid ) && $this->checkTouched() ) {
 598                         if( $wgOut->checkLastModified( $this->mTouched ) ){
 599                                 wfProfileOut( $fname );
 600                                 return;
 601                         } else if ( $this->tryFileCache() ) {
 602                                 # tell wgOut that output is taken care of
 603                                 $wgOut->disable();
 604                                 $this->viewUpdates();
 605                                 wfProfileOut( $fname );
 606                                 return;
 607                         }
 608                 }
 609                 # Should the parser cache be used?
 610                 if ( $wgEnableParserCache && intval($wgUser->getOption( 'stubthreshold' )) == 0 && empty( $oldid ) ) {
 611                         $pcache = true;
 612                 } else {
 613                         $pcache = false;
 614                 }
 615
 616                 $outputDone = false;
 617                 if ( $pcache ) {
 618                         if ( $wgOut->tryParserCache( $this, $wgUser ) ) {
 619                                 $outputDone = true;
 620                         }
 621                 }
 622                 if ( !$outputDone ) {
 623                         $text = $this->getContent( false ); # May change mTitle by following a redirect
 624
 625                         # Another whitelist check in case oldid or redirects are altering the title
 626                         if ( !$this->mTitle->userCanRead() ) {
 627                                 $wgOut->loginToUse();
 628                                 $wgOut->output();
 629                                 exit;
 630                         }
 631
 632
 633                         # We're looking at an old revision
 634
 635                         if ( !empty( $oldid ) ) {
 636                                 $this->setOldSubtitle( isset($this->mOldId) ? $this->mOldId : $oldid );
 637                                 $wgOut->setRobotpolicy( 'noindex,follow' );
 638                         }
 639                         if ( '' != $this->mRedirectedFrom ) {
 640                                 $sk = $wgUser->getSkin();
 641                                 $redir = $sk->makeKnownLink( $this->mRedirectedFrom, '',
 642                                   'redirect=no' );
 643                                 $s = wfMsg( 'redirectedfrom', $redir );
 644                                 $wgOut->setSubtitle( $s );
 645
 646                                 # Can't cache redirects
 647                                 $pcache = false;
 648                         } elseif ( !empty( $rdfrom ) ) {
 649                                 $sk = $wgUser->getSkin();
 650                                 $redir = $sk->makeExternalLink( $rdfrom, $rdfrom );
 651                                 $s = wfMsg( 'redirectedfrom', $redir );
 652                                 $wgOut->setSubtitle( $s );
 653                         }
 654
 655                         # wrap user css and user js in pre and don't parse
 656                         # XXX: use $this->mTitle->usCssJsSubpage() when php is fixed/ a workaround is found
 657                         if (
 658                                 $this->mTitle->getNamespace() == NS_USER &&
 659                                 preg_match('/\\/[\\w]+\\.(css|js)$/', $this->mTitle->getDBkey())
 660                         ) {
 661                                 $wgOut->addWikiText( wfMsg('clearyourcache'));
 662                                 $wgOut->addHTML( '<pre>'.htmlspecialchars($this->mContent)."\n</pre>" );
 663                         } else if ( $rt = Title::newFromRedirect( $text ) ) {
 664                                 # Display redirect
 665                                 $imageUrl = $wgStylePath.'/common/images/redirect.png';
 666                                 $targetUrl = $rt->escapeLocalURL();
 667                                 $titleText = htmlspecialchars( $rt->getPrefixedText() );
 668                                 $link = $sk->makeLinkObj( $rt );
 669
 670                                 $wgOut->addHTML( '<img valign="center" src="'.$imageUrl.'" alt="#REDIRECT" />' .
 671                                   '<span class="redirectText">'.$link.'</span>' );
 672
 673                         } else if ( $pcache ) {
 674                                 # Display content and save to parser cache
 675                                 $wgOut->addPrimaryWikiText( $text, $this );
 676                         } else {
 677                                 # Display content, don't attempt to save to parser cache
 678                                 $wgOut->addWikiText( $text );
 679                         }
 680                 }
 681                 $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
 682                 # If we have been passed an &rcid= parameter, we want to give the user a
 683                 # chance to mark this new article as patrolled.
 684                 if ( $wgUseRCPatrol && !is_null ( $rcid ) && $rcid != 0 && $wgUser->isLoggedIn() &&
 685                      ( $wgUser->isAllowed('patrol') || !$wgOnlySysopsCanPatrol ) )
 686                 {
 687                         $wgOut->addHTML( wfMsg ( 'markaspatrolledlink',
 688                                 $sk->makeKnownLinkObj ( $this->mTitle, wfMsg ( 'markaspatrolledtext' ),
 689                                         'action=markpatrolled&rcid='.$rcid )
 690                          ) );
 691                 }
 692
 693                 # Put link titles into the link cache
 694                 $wgOut->transformBuffer();
 695
 696                 # Add link titles as META keywords
 697                 $wgOut->addMetaTags() ;
 698
 699                 $this->viewUpdates();
 700                 wfProfileOut( $fname );
 701
 702                 $wgUser->clearNotification( $this->mTitle );
 703         }
 704
 705         /**
 706          * Theoretically we could defer these whole insert and update
 707          * functions for after display, but that's taking a big leap
 708          * of faith, and we want to be able to report database
 709          * errors at some point.
 710          * @private
 711          */
 712         function insertNewArticle( $text, $summary, $isminor, $watchthis ) {
 713                 global $wgOut, $wgUser;
 714                 global $wgUseSquid, $wgDeferredUpdateList, $wgInternalServer;
 715
 716                 $fname = 'Article::insertNewArticle';
 717
 718                 $this->mCountAdjustment = $this->isCountable( $text );
 719
 720                 $ns = $this->mTitle->getNamespace();
 721                 $ttl = $this->mTitle->getDBkey();
 722                 $text = $this->preSaveTransform( $text );
 723                 if ( $this->isRedirect( $text ) ) { $redir = 1; }
 724                 else { $redir = 0; }
 725
 726                 $now = wfTimestampNow();
 727                 wfSeedRandom();
 728                 $rand = wfRandom();
 729                 $isminor = ( $isminor && $wgUser->isLoggedIn() ) ? 1 : 0;
 730
 731                 $mungedText = $text;
 732                 $flags = Revision::compressRevisionText( $mungedText );
 733
 734                 $dbw =& wfGetDB( DB_MASTER );
 735
 736                 $old_id = $dbw->nextSequenceValue( 'text_old_id_seq' );
 737                 $dbw->insert( 'text', array(
 738                         'old_id' => $old_id,
 739                         'old_text' => $mungedText,
 740                         'old_flags' => $flags,
 741                 ), $fname );
 742                 $revisionId = $dbw->insertId();
 743
 744                 $page_id = $dbw->nextSequenceValue( 'page_page_id_seq' );
 745                 $dbw->insert( 'page', array(
 746                         'page_id' => $page_id,
 747                         'page_namespace' => $ns,
 748                         'page_title' => $ttl,
 749                         'page_counter' => 0,
 750                         'page_restrictions' => '',
 751                         'page_is_redirect' => $redir,
 752                         'page_is_new' => 1,
 753                         'page_random' => $rand,
 754                         'page_touched' => $dbw->timestamp($now),
 755                         'page_latest' => $revisionId,
 756                 ), $fname );
 757                 $newid = $dbw->insertId();
 758
 759                 $dbw->insert( 'revision', array(
 760                         'rev_page' => $newid,
 761                         'rev_id' => $revisionId,
 762                         'rev_comment' => $summary,
 763                         'rev_user' => $wgUser->getID(),
 764                         'rev_timestamp' => $dbw->timestamp($now),
 765                         'rev_minor_edit' => $isminor,
 766                         'rev_user_text' => $wgUser->getName(),
 767                 ), $fname );
 768
 769                 $this->mTitle->resetArticleID( $newid );
 770
 771                 Article::onArticleCreate( $this->mTitle );
 772                 RecentChange::notifyNew( $now, $this->mTitle, $isminor, $wgUser, $summary );
 773
 774                 if ($watchthis) {
 775                         if(!$this->mTitle->userIsWatching()) $this->watch();
 776                 } else {
 777                         if ( $this->mTitle->userIsWatching() ) {
 778                                 $this->unwatch();
 779                         }
 780                 }
 781
 782                 # The talk page isn't in the regular link tables, so we need to update manually:
 783                 $talkns = $ns ^ 1; # talk -> normal; normal -> talk
 784                 $dbw->update( 'page',
 785                         array( 'page_touched' => $dbw->timestamp($now) ),
 786                         array( 'page_namespace' => $talkns,
 787                                'page_title' => $ttl ),
 788                         $fname );
 789
 790                 # standard deferred updates
 791                 $this->editUpdates( $text, $summary, $isminor, $now );
 792
 793                 $oldid = 0; # new article
 794                 $this->showArticle( $text, wfMsg( 'newarticle' ), false, $isminor, $now, $summary, $oldid );
 795         }
 796
 797         /**
 798          * Fetch and uncompress the text for a given revision.
 799          * Can ask by rev_id number or timestamp (set $field)
 800          */
 801         function fetchRevisionText( $revId = null, $field = 'rev_id' ) {
 802                 $fname = 'Article::fetchRevisionText';
 803                 $dbw =& wfGetDB( DB_MASTER );
 804                 if( $revId ) {
 805                         $rev = $dbw->addQuotes( $revId );
 806                 } else {
 807                         $rev = 'page_latest';
 808                 }
 809                 $result = $dbw->query(
 810                         sprintf( "SELECT old_text, old_flags
 811                                 FROM %s,%s,%s
 812                                 WHERE old_id=rev_id AND rev_page=page_id AND page_id=%d
 813                                 AND %s=%s",
 814                                 $dbw->tableName( 'page' ),
 815                                 $dbw->tableName( 'revision' ),
 816                                 $dbw->tableName( 'text' ),
 817                                 IntVal( $this->mTitle->getArticleId() ),
 818                                 $field,
 819                                 $rev ),
 820                         $fname );
 821                 $obj = $dbw->fetchObject( $result );
 822                 $dbw->freeResult( $result );
 823                 $oldtext = Revision::getRevisionText( $obj );
 824                 return $oldtext;
 825         }
 826
 827         function getTextOfLastEditWithSectionReplacedOrAdded($section, $text, $summary = '', $edittime = NULL) {
 828                 $fname = 'Article::getTextOfLastEditWithSectionReplacedOrAdded';
 829                 if( is_null( $edittime ) ) {
 830                         $oldtext = $this->fetchRevisionText();
 831                 } else {
 832                         $oldtext = $this->fetchRevisionText( $edittime, 'rev_timestamp' );
 833                 }
 834                 if ($section != '') {
 835                         if($section=='new') {
 836                                 if($summary) $subject="== {$summary} ==\n\n";
 837                                 $text=$oldtext."\n\n".$subject.$text;
 838                         } else {
 839
 840                                 # strip NOWIKI etc. to avoid confusion (true-parameter causes HTML
 841                                 # comments to be stripped as well)
 842                                 $striparray=array();
 843                                 $parser=new Parser();
 844                                 $parser->mOutputType=OT_WIKI;
 845                                 $oldtext=$parser->strip($oldtext, $striparray, true);
 846
 847                                 # now that we can be sure that no pseudo-sections are in the source,
 848                                 # split it up
 849                                 # Unfortunately we can't simply do a preg_replace because that might
 850                                 # replace the wrong section, so we have to use the section counter instead
 851                                 $secs=preg_split('/(^=+.+?=+|^<h[1-6].*?' . '>.*?<\/h[1-6].*?' . '>)(?!\S)/mi',
 852                                   $oldtext,-1,PREG_SPLIT_DELIM_CAPTURE);
 853                                 $secs[$section*2]=$text."\n\n"; // replace with edited
 854
 855                                 # section 0 is top (intro) section
 856                                 if($section!=0) {
 857
 858                                         # headline of old section - we need to go through this section
 859                                         # to determine if there are any subsections that now need to
 860                                         # be erased, as the mother section has been replaced with
 861                                         # the text of all subsections.
 862                                         $headline=$secs[$section*2-1];
 863                                         preg_match( '/^(=+).+?=+|^<h([1-6]).*?' . '>.*?<\/h[1-6].*?' . '>(?!\S)/mi',$headline,$matches);
 864                                         $hlevel=$matches[1];
 865
 866                                         # determine headline level for wikimarkup headings
 867                                         if(strpos($hlevel,'=')!==false) {
 868                                                 $hlevel=strlen($hlevel);
 869                                         }
 870
 871                                         $secs[$section*2-1]=''; // erase old headline
 872                                         $count=$section+1;
 873                                         $break=false;
 874                                         while(!empty($secs[$count*2-1]) && !$break) {
 875
 876                                                 $subheadline=$secs[$count*2-1];
 877                                                 preg_match(
 878                                                  '/^(=+).+?=+|^<h([1-6]).*?' . '>.*?<\/h[1-6].*?' . '>(?!\S)/mi',$subheadline,$matches);
 879                                                 $subhlevel=$matches[1];
 880                                                 if(strpos($subhlevel,'=')!==false) {
 881                                                         $subhlevel=strlen($subhlevel);
 882                                                 }
 883                                                 if($subhlevel > $hlevel) {
 884                                                         // erase old subsections
 885                                                         $secs[$count*2-1]='';
 886                                                         $secs[$count*2]='';
 887                                                 }
 888                                                 if($subhlevel <= $hlevel) {
 889                                                         $break=true;
 890                                                 }
 891                                                 $count++;
 892
 893                                         }
 894
 895                                 }
 896                                 $text=join('',$secs);
 897                                 # reinsert the stuff that we stripped out earlier
 898                                 $text=$parser->unstrip($text,$striparray);
 899                                 $text=$parser->unstripNoWiki($text,$striparray);
 900                         }
 901
 902                 }
 903                 return $text;
 904         }
 905
 906         /**
 907          * Change an existing article. Puts the previous version back into the old table, updates RC
 908          * and all necessary caches, mostly via the deferred update array.
 909          *
 910          * It is possible to call this function from a command-line script, but note that you should
 911          * first set $wgUser, and clean up $wgDeferredUpdates after each edit.
 912          */
 913         function updateArticle( $text, $summary, $minor, $watchthis, $forceBot = false, $sectionanchor = '' ) {
 914                 global $wgOut, $wgUser;
 915                 global $wgDBtransactions, $wgMwRedir;
 916                 global $wgUseSquid, $wgInternalServer, $wgPostCommitUpdateList;
 917
 918                 $fname = 'Article::updateArticle';
 919                 $good = true;
 920
 921                 if ( $this->mMinorEdit ) { $me1 = 1; } else { $me1 = 0; }
 922                 if ( $minor && $wgUser->isLoggedIn() ) { $me2 = 1; } else { $me2 = 0; }
 923                 if ( $this->isRedirect( $text ) ) {
 924                         # Remove all content but redirect
 925                         # This could be done by reconstructing the redirect from a title given by
 926                         # Title::newFromRedirect(), but then we wouldn't know which synonym the user
 927                         # wants to see
 928                         if ( preg_match( "/^((" . $wgMwRedir->getBaseRegex() . ')[^\\n]+)/i', $text, $m ) ) {
 929                                 $redir = 1;
 930                                 $text = $m[1] . "\n";
 931                         }
 932                 }
 933                 else { $redir = 0; }
 934
 935                 $text = $this->preSaveTransform( $text );
 936                 $dbw =& wfGetDB( DB_MASTER );
 937
 938                 # Update article, but only if changed.
 939
 940                 # It's important that we either rollback or complete, otherwise an attacker could
 941                 # overwrite cur entries by sending precisely timed user aborts. Random bored users
 942                 # could conceivably have the same effect, especially if cur is locked for long periods.
 943                 if( $wgDBtransactions ) {
 944                         $dbw->query( 'BEGIN', $fname );
 945                 } else {
 946                         $userAbort = ignore_user_abort( true );
 947                 }
 948
 949                 $oldtext = $this->getContent( true );
 950
 951                 if ( 0 != strcmp( $text, $oldtext ) ) {
 952                         $this->mCountAdjustment = $this->isCountable( $text )
 953                           - $this->isCountable( $oldtext );
 954                         $now = wfTimestampNow();
 955
 956                         $mungedText = $text;
 957                         $flags = Revision::compressRevisionText( $mungedText );
 958
 959                         $lastRevision = $dbw->selectField(
 960                                 'page', 'page_latest', array( 'page_id' => $this->getId() ) );
 961
 962                         # Record the text to the text table
 963                         $old_id = $dbw->nextSequenceValue( 'text_old_id_val' );
 964                         $dbw->insert( 'text',
 965                                 array(
 966                                         'old_id' => $old_id,
 967                                         'old_text' => $mungedText,
 968                                         'old_flags' => $flags,
 969                                 ), $fname
 970                         );
 971                         $revisionId = $dbw->insertId();
 972
 973                         # Record the edit in revisions
 974                         $dbw->insert( 'revision',
 975                                 array(
 976                                         'rev_id' => $revisionId,
 977                                         'rev_page' => $this->getID(),
 978                                         'rev_comment' => $summary,
 979                                         'rev_minor_edit' => $me2,
 980                                         'rev_user' => $wgUser->getID(),
 981                                         'rev_user_text' => $wgUser->getName(),
 982                                         'rev_timestamp' => $dbw->timestamp( $now ),
 983                                 ), $fname
 984                         );
 985
 986                         # Update page
 987                         $dbw->update( 'page',
 988                                 array( /* SET */
 989                                         'page_latest' => $revisionId,
 990                                         'page_touched' => $dbw->timestamp( $now ),
 991                                         'page_is_new' => 0,
 992                                         'page_is_redirect' => $redir,
 993                                 ), array( /* WHERE */
 994                                         'page_id' => $this->getID(),
 995                                         'page_latest' => $lastRevision, # Paranoia
 996                                 ), $fname
 997                         );
 998
 999                         if( $dbw->affectedRows() == 0 ) {
1000                                 /* Belated edit conflict! Run away!! */
1001                                 $good = false;
1002                         } else {
1003                                 # Update recentchanges and purge cache and whatnot
1004                                 $bot = (int)($wgUser->isBot() || $forceBot);
1005                                 RecentChange::notifyEdit( $now, $this->mTitle, $me2, $wgUser, $summary,
1006                                         $lastRevision, $this->getTimestamp(), $bot );
1007                                 Article::onArticleEdit( $this->mTitle );
1008                         }
1009                 }
1010
1011                 if( $wgDBtransactions ) {
1012                         $dbw->query( 'COMMIT', $fname );
1013                 } else {
1014                         ignore_user_abort( $userAbort );
1015                 }
1016
1017                 if ( $good ) {
1018                 if ($watchthis) {
1019                         if (!$this->mTitle->userIsWatching()) $this->watch();
1020                 } else {
1021                         if ( $this->mTitle->userIsWatching() ) {
1022                                 $this->unwatch();
1023                         }
1024                 }
1025                 # standard deferred updates
1026                 $this->editUpdates( $text, $summary, $minor, $now );
1027
1028
1029                 $urls = array();
1030                 # Template namespace
1031                 # Purge all articles linking here
1032                 if ( $this->mTitle->getNamespace() == NS_TEMPLATE) {
1033                         $titles = $this->mTitle->getLinksTo();
1034                         Title::touchArray( $titles );
1035                         if ( $wgUseSquid ) {
1036                                         foreach ( $titles as $title ) {
1037                                                 $urls[] = $title->getInternalURL();
1038                                         }
1039                         }
1040                 }
1041
1042                 # Squid updates
1043                 if ( $wgUseSquid ) {
1044                         $urls = array_merge( $urls, $this->mTitle->getSquidURLs() );
1045                         $u = new SquidUpdate( $urls );
1046                         array_push( $wgPostCommitUpdateList, $u );
1047                 }
1048
1049                 $this->showArticle( $text, wfMsg( 'updated' ), $sectionanchor, $me2, $now, $summary, $lastRevision );
1050                 }
1051                 return $good;
1052         }
1053
1054         /**
1055          * After we've either updated or inserted the article, update
1056          * the link tables and redirect to the new page.
1057          */
1058         function showArticle( $text, $subtitle , $sectionanchor = '', $me2, $now, $summary, $oldid ) {
1059                 global $wgOut, $wgUser, $wgLinkCache, $wgEnotif;
1060
1061                 $wgLinkCache = new LinkCache();
1062                 # Select for update
1063                 $wgLinkCache->forUpdate( true );
1064
1065                 # Get old version of link table to allow incremental link updates
1066                 $wgLinkCache->preFill( $this->mTitle );
1067                 $wgLinkCache->clear();
1068
1069                 # Parse the text and replace links with placeholders
1070                 $wgOut = new OutputPage();
1071                 $wgOut->addWikiText( $text );
1072
1073                 # Look up the links in the DB and add them to the link cache
1074                 $wgOut->transformBuffer( RLH_FOR_UPDATE );
1075
1076                 if( $this->isRedirect( $text ) )
1077                         $r = 'redirect=no';
1078                 else
1079                         $r = '';
1080                 $wgOut->redirect( $this->mTitle->getFullURL( $r ).$sectionanchor );
1081
1082                 # this call would better fit into RecentChange::notifyEdit and RecentChange::notifyNew .
1083                 # this will be improved later (to-do)
1084
1085                 include_once( "UserMailer.php" );
1086                 $wgEnotif = new EmailNotification ();
1087                 $wgEnotif->NotifyOnPageChange( $wgUser->getID(), $this->mTitle->getDBkey(), $this->mTitle->getNamespace(),$now, $summary, $me2, $oldid );
1088         }
1089
1090         /**
1091          * Mark this particular edit as patrolled
1092          */
1093         function markpatrolled() {
1094                 global $wgOut, $wgRequest, $wgOnlySysopsCanPatrol, $wgUseRCPatrol, $wgUser;
1095                 $wgOut->setRobotpolicy( 'noindex,follow' );
1096
1097                 if ( !$wgUseRCPatrol )
1098                 {
1099                         $wgOut->errorpage( 'rcpatroldisabled', 'rcpatroldisabledtext' );
1100                         return;
1101                 }
1102                 if ( $wgUser->isAnon() )
1103                 {
1104                         $wgOut->loginToUse();
1105                         return;
1106                 }
1107                 if ( $wgOnlySysopsCanPatrol && !$wgUser->isAllowed('patrol') )
1108                 {
1109                         $wgOut->sysopRequired();
1110                         return;
1111                 }
1112                 $rcid = $wgRequest->getVal( 'rcid' );
1113                 if ( !is_null ( $rcid ) )
1114                 {
1115                         RecentChange::markPatrolled( $rcid );
1116                         $wgOut->setPagetitle( wfMsg( 'markedaspatrolled' ) );
1117                         $wgOut->addWikiText( wfMsg( 'markedaspatrolledtext' ) );
1118
1119                         $rcTitle = Title::makeTitle( NS_SPECIAL, 'Recentchanges' );
1120                         $wgOut->returnToMain( false, $rcTitle->getPrefixedText() );
1121                 }
1122                 else
1123                 {
1124                         $wgOut->errorpage( 'markedaspatrollederror', 'markedaspatrollederrortext' );
1125                 }
1126         }
1127
1128
1129         /**
1130          * Add this page to $wgUser's watchlist
1131          */
1132
1133         function watch() {
1134
1135                 global $wgUser, $wgOut;
1136
1137                 if ( $wgUser->isAnon() ) {
1138                         $wgOut->errorpage( 'watchnologin', 'watchnologintext' );
1139                         return;
1140                 }
1141                 if ( wfReadOnly() ) {
1142                         $wgOut->readOnlyPage();
1143                         return;
1144                 }
1145
1146                 if (wfRunHooks('WatchArticle', $wgUser, $this)) {
1147
1148                         $wgUser->addWatch( $this->mTitle );
1149                         $wgUser->saveSettings();
1150
1151                         wfRunHooks('WatchArticleComplete', $wgUser, $this);
1152
1153                         $wgOut->setPagetitle( wfMsg( 'addedwatch' ) );
1154                         $wgOut->setRobotpolicy( 'noindex,follow' );
1155
1156                         $link = $this->mTitle->getPrefixedText();
1157                         $text = wfMsg( 'addedwatchtext', $link );
1158                         $wgOut->addWikiText( $text );
1159                 }
1160
1161                 $wgOut->returnToMain( true, $this->mTitle->getPrefixedText() );
1162         }
1163
1164         /**
1165          * Stop watching a page
1166          */
1167
1168         function unwatch() {
1169
1170                 global $wgUser, $wgOut;
1171
1172                 if ( $wgUser->isAnon() ) {
1173                         $wgOut->errorpage( 'watchnologin', 'watchnologintext' );
1174                         return;
1175                 }
1176                 if ( wfReadOnly() ) {
1177                         $wgOut->readOnlyPage();
1178                         return;
1179                 }
1180
1181                 if (wfRunHooks('UnwatchArticle', $wgUser, $this)) {
1182
1183                         $wgUser->removeWatch( $this->mTitle );
1184                         $wgUser->saveSettings();
1185
1186                         wfRunHooks('UnwatchArticleComplete', $wgUser, $this);
1187
1188                         $wgOut->setPagetitle( wfMsg( 'removedwatch' ) );
1189                         $wgOut->setRobotpolicy( 'noindex,follow' );
1190
1191                         $link = $this->mTitle->getPrefixedText();
1192                         $text = wfMsg( 'removedwatchtext', $link );
1193                         $wgOut->addWikiText( $text );
1194                 }
1195
1196                 $wgOut->returnToMain( true, $this->mTitle->getPrefixedText() );
1197         }
1198
1199         /**
1200          * protect a page
1201          */
1202         function protect( $limit = 'sysop' ) {
1203                 global $wgUser, $wgOut, $wgRequest;
1204
1205                 if ( ! $wgUser->isAllowed('protect') ) {
1206                         $wgOut->sysopRequired();
1207                         return;
1208                 }
1209                 if ( wfReadOnly() ) {
1210                         $wgOut->readOnlyPage();
1211                         return;
1212                 }
1213                 $id = $this->mTitle->getArticleID();
1214                 if ( 0 == $id ) {
1215                         $wgOut->fatalError( wfMsg( 'badarticleerror' ) );
1216                         return;
1217                 }
1218
1219                 $confirm = $wgRequest->getBool( 'wpConfirmProtect' ) &&
1220                         $wgRequest->wasPosted() &&
1221                         $wgUser->matchEditToken( $wgRequest->getVal( 'wpEditToken' ) );
1222                 $moveonly = $wgRequest->getBool( 'wpMoveOnly' );
1223                 $reason = $wgRequest->getText( 'wpReasonProtect' );
1224
1225                 if ( $confirm ) {
1226                         $dbw =& wfGetDB( DB_MASTER );
1227                         $dbw->update( 'page',
1228                                 array( /* SET */
1229                                         'page_touched' => $dbw->timestamp(),
1230                                         'page_restrictions' => (string)$limit
1231                                 ), array( /* WHERE */
1232                                         'page_id' => $id
1233                                 ), 'Article::protect'
1234                         );
1235
1236                         $restrictions = "move=" . $limit;
1237                         if( !$moveonly ) {
1238                                 $restrictions .= ":edit=" . $limit;
1239                         }
1240                         if (wfRunHooks('ArticleProtect', $this, $wgUser, $limit == 'sysop', $reason, $moveonly)) {
1241
1242                                 $dbw =& wfGetDB( DB_MASTER );
1243                                 $dbw->update( 'page',
1244                                                           array( /* SET */
1245                                                                          'page_touched' => $dbw->timestamp(),
1246                                                                          'page_restrictions' => $restrictions
1247                                                                          ), array( /* WHERE */
1248                                                                                            'page_id' => $id
1249                                                                                            ), 'Article::protect'
1250                                                           );
1251
1252                                 wfRunHooks('ArticleProtectComplete', $this, $wgUser, $limit == 'sysop', $reason, $moveonly);
1253
1254                                 $log = new LogPage( 'protect' );
1255                                 if ( $limit === '' ) {
1256                                         $log->addEntry( 'unprotect', $this->mTitle, $reason );
1257                                 } else {
1258                                         $log->addEntry( 'protect', $this->mTitle, $reason );
1259                                 }
1260                                 $wgOut->redirect( $this->mTitle->getFullURL() );
1261                         }
1262                         return;
1263                 } else {
1264                         $reason = htmlspecialchars( wfMsg( 'protectreason' ) );
1265                         return $this->confirmProtect( '', $reason, $limit );
1266                 }
1267         }
1268
1269         /**
1270          * Output protection confirmation dialog
1271          */
1272         function confirmProtect( $par, $reason, $limit = 'sysop'  ) {
1273                 global $wgOut, $wgUser;
1274
1275                 wfDebug( "Article::confirmProtect\n" );
1276
1277                 $sub = htmlspecialchars( $this->mTitle->getPrefixedText() );
1278                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
1279
1280                 $check = '';
1281                 $protcom = '';
1282                 $moveonly = '';
1283
1284                 if ( $limit === '' ) {
1285                         $wgOut->setPageTitle( wfMsg( 'confirmunprotect' ) );
1286                         $wgOut->setSubtitle( wfMsg( 'unprotectsub', $sub ) );
1287                         $wgOut->addWikiText( wfMsg( 'confirmunprotecttext' ) );
1288                         $check = htmlspecialchars( wfMsg( 'confirmunprotect' ) );
1289                         $protcom = htmlspecialchars( wfMsg( 'unprotectcomment' ) );
1290                         $formaction = $this->mTitle->escapeLocalURL( 'action=unprotect' . $par );
1291                 } else {
1292                         $wgOut->setPageTitle( wfMsg( 'confirmprotect' ) );
1293                         $wgOut->setSubtitle( wfMsg( 'protectsub', $sub ) );
1294                         $wgOut->addWikiText( wfMsg( 'confirmprotecttext' ) );
1295                         $check = htmlspecialchars( wfMsg( 'confirmprotect' ) );
1296                         $moveonly = htmlspecialchars( wfMsg( 'protectmoveonly' ) );
1297                         $protcom = htmlspecialchars( wfMsg( 'protectcomment' ) );
1298                         $formaction = $this->mTitle->escapeLocalURL( 'action=protect' . $par );
1299                 }
1300
1301                 $confirm = htmlspecialchars( wfMsg( 'confirm' ) );
1302                 $token = htmlspecialchars( $wgUser->editToken() );
1303
1304                 $wgOut->addHTML( "
1305 <form id='protectconfirm' method='post' action=\"{$formaction}\">
1306         <table border='0'>
1307                 <tr>
1308                         <td align='right'>
1309                                 <label for='wpReasonProtect'>{$protcom}:</label>
1310                         </td>
1311                         <td align='left'>
1312                                 <input type='text' size='60' name='wpReasonProtect' id='wpReasonProtect' value=\"" . htmlspecialchars( $reason ) . "\" />
1313                         </td>
1314                 </tr>
1315                 <tr>
1316                         <td>&nbsp;</td>
1317                 </tr>
1318                 <tr>
1319                         <td align='right'>
1320                                 <input type='checkbox' name='wpConfirmProtect' value='1' id='wpConfirmProtect' />
1321                         </td>
1322                         <td>
1323                                 <label for='wpConfirmProtect'>{$check}</label>
1324                         </td>
1325                 </tr> " );
1326                 if($moveonly != '') {
1327                         $wgOut->AddHTML( "
1328                 <tr>
1329                         <td align='right'>
1330                                 <input type='checkbox' name='wpMoveOnly' value='1' id='wpMoveOnly' />
1331                         </td>
1332                         <td>
1333                                 <label for='wpMoveOnly'>{$moveonly}</label>
1334                         </td>
1335                 </tr> " );
1336                 }
1337                 $wgOut->addHTML( "
1338                 <tr>
1339                         <td>&nbsp;</td>
1340                         <td>
1341                                 <input type='submit' name='wpConfirmProtectB' value=\"{$confirm}\" />
1342                         </td>
1343                 </tr>
1344         </table>
1345         <input type='hidden' name='wpEditToken' value=\"{$token}\" />
1346 </form>\n" );
1347
1348                 $wgOut->returnToMain( false );
1349         }
1350
1351         /**
1352          * Unprotect the pages
1353          */
1354         function unprotect() {
1355                 return $this->protect( '' );
1356         }
1357
1358         /*
1359          * UI entry point for page deletion
1360          */
1361         function delete() {
1362                 global $wgUser, $wgOut, $wgMessageCache, $wgRequest;
1363                 $fname = 'Article::delete';
1364                 $confirm = $wgRequest->getBool( 'wpConfirm' ) &&
1365                         $wgRequest->wasPosted() &&
1366                         $wgUser->matchEditToken( $wgRequest->getVal( 'wpEditToken' ) );
1367                 $reason = $wgRequest->getText( 'wpReason' );
1368
1369                 # This code desperately needs to be totally rewritten
1370
1371                 # Check permissions
1372                 if ( ( ! $wgUser->isAllowed('delete') ) ) {
1373                         $wgOut->sysopRequired();
1374                         return;
1375                 }
1376                 if ( wfReadOnly() ) {
1377                         $wgOut->readOnlyPage();
1378                         return;
1379                 }
1380
1381                 # Better double-check that it hasn't been deleted yet!
1382                 $wgOut->setPagetitle( wfMsg( 'confirmdelete' ) );
1383                 if ( ( '' == trim( $this->mTitle->getText() ) )
1384                   or ( $this->mTitle->getArticleId() == 0 ) ) {
1385                         $wgOut->fatalError( wfMsg( 'cannotdelete' ) );
1386                         return;
1387                 }
1388
1389                 if ( $confirm ) {
1390                         $this->doDelete( $reason );
1391                         return;
1392                 }
1393
1394                 # determine whether this page has earlier revisions
1395                 # and insert a warning if it does
1396                 # we select the text because it might be useful below
1397                 $dbr =& $this->getDB();
1398                 $ns = $this->mTitle->getNamespace();
1399                 $title = $this->mTitle->getDBkey();
1400                 $revisions = $dbr->select( array( 'page', 'revision' ),
1401                         array( 'rev_id' ),
1402                         array(
1403                                 'page_namespace' => $ns,
1404                                 'page_title' => $title,
1405                                 'rev_page = page_id'
1406                         ), $fname, $this->getSelectOptions( array( 'ORDER BY' => 'rev_timestamp DESC' ) )
1407                 );
1408
1409                 if( $dbr->numRows( $revisions ) > 1 && !$confirm ) {
1410                         $skin=$wgUser->getSkin();
1411                         $wgOut->addHTML('<b>'.wfMsg('historywarning'));
1412                         $wgOut->addHTML( $skin->historyLink() .'</b>');
1413                 }
1414
1415                 # Fetch cur_text
1416                 $s = $dbr->selectRow( array( 'page', 'text' ),
1417                         array( 'old_text' ),
1418                         array(
1419                                 'page_namespace' => $ns,
1420                                 'page_title' => $title,
1421                                 'page_latest = old_id'
1422                         ), $fname, $this->getSelectOptions()
1423                 );
1424
1425                 if( $s !== false ) {
1426                         # if this is a mini-text, we can paste part of it into the deletion reason
1427
1428                         #if this is empty, an earlier revision may contain "useful" text
1429                         $blanked = false;
1430                         if($s->old_text != '') {
1431                                 $text=$s->old_text;
1432                         } else {
1433                                 if($old) { # TODO
1434                                         $text = Revision::getRevisionText( $old );
1435                                         $blanked = true;
1436                                 }
1437
1438                         }
1439
1440                         $length=strlen($text);
1441
1442                         # this should not happen, since it is not possible to store an empty, new
1443                         # page. Let's insert a standard text in case it does, though
1444                         if($length == 0 && $reason === '') {
1445                                 $reason = wfMsg('exblank');
1446                         }
1447
1448                         if($length < 500 && $reason === '') {
1449
1450                                 # comment field=255, let's grep the first 150 to have some user
1451                                 # space left
1452                                 $text=substr($text,0,150);
1453                                 # let's strip out newlines and HTML tags
1454                                 $text=preg_replace('/\"/',"'",$text);
1455                                 $text=preg_replace('/\</','&lt;',$text);
1456                                 $text=preg_replace('/\>/','&gt;',$text);
1457                                 $text=preg_replace("/[\n\r]/",'',$text);
1458                                 if(!$blanked) {
1459                                         $reason=wfMsg('excontent'). " '".$text;
1460                                 } else {
1461                                         $reason=wfMsg('exbeforeblank') . " '".$text;
1462                                 }
1463                                 if($length>150) { $reason .= '...'; } # we've only pasted part of the text
1464                                 $reason.="'";
1465                         }
1466                 }
1467
1468                 return $this->confirmDelete( '', $reason );
1469         }
1470
1471         /**
1472          * Output deletion confirmation dialog
1473          */
1474         function confirmDelete( $par, $reason ) {
1475                 global $wgOut, $wgUser;
1476
1477                 wfDebug( "Article::confirmDelete\n" );
1478
1479                 $sub = htmlspecialchars( $this->mTitle->getPrefixedText() );
1480                 $wgOut->setSubtitle( wfMsg( 'deletesub', $sub ) );
1481                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
1482                 $wgOut->addWikiText( wfMsg( 'confirmdeletetext' ) );
1483
1484                 $formaction = $this->mTitle->escapeLocalURL( 'action=delete' . $par );
1485
1486                 $confirm = htmlspecialchars( wfMsg( 'confirm' ) );
1487                 $check = htmlspecialchars( wfMsg( 'confirmcheck' ) );
1488                 $delcom = htmlspecialchars( wfMsg( 'deletecomment' ) );
1489                 $token = htmlspecialchars( $wgUser->editToken() );
1490
1491                 $wgOut->addHTML( "
1492 <form id='deleteconfirm' method='post' action=\"{$formaction}\">
1493         <table border='0'>
1494                 <tr>
1495                         <td align='right'>
1496                                 <label for='wpReason'>{$delcom}:</label>
1497                         </td>
1498                         <td align='left'>
1499                                 <input type='text' size='60' name='wpReason' id='wpReason' value=\"" . htmlspecialchars( $reason ) . "\" />
1500                         </td>
1501                 </tr>
1502                 <tr>
1503                         <td>&nbsp;</td>
1504                 </tr>
1505                 <tr>
1506                         <td align='right'>
1507                                 <input type='checkbox' name='wpConfirm' value='1' id='wpConfirm' />
1508                         </td>
1509                         <td>
1510                                 <label for='wpConfirm'>{$check}</label>
1511                         </td>
1512                 </tr>
1513                 <tr>
1514                         <td>&nbsp;</td>
1515                         <td>
1516                                 <input type='submit' name='wpConfirmB' value=\"{$confirm}\" />
1517                         </td>
1518                 </tr>
1519         </table>
1520         <input type='hidden' name='wpEditToken' value=\"{$token}\" />
1521 </form>\n" );
1522
1523                 $wgOut->returnToMain( false );
1524         }
1525
1526
1527         /**
1528          * Perform a deletion and output success or failure messages
1529          */
1530         function doDelete( $reason ) {
1531                 global $wgOut, $wgUser, $wgContLang;
1532                 $fname = 'Article::doDelete';
1533                 wfDebug( $fname."\n" );
1534
1535                 if (wfRunHooks('ArticleDelete', $this, $wgUser, $reason)) {
1536                         if ( $this->doDeleteArticle( $reason ) ) {
1537                                 $deleted = $this->mTitle->getPrefixedText();
1538
1539                                 $wgOut->setPagetitle( wfMsg( 'actioncomplete' ) );
1540                                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
1541
1542                                 $sk = $wgUser->getSkin();
1543                                 $loglink = $sk->makeKnownLink( $wgContLang->getNsText( NS_PROJECT ) .
1544                                                                                            ':' . wfMsgForContent( 'dellogpage' ),
1545                                                                                            wfMsg( 'deletionlog' ) );
1546
1547                                 $text = wfMsg( 'deletedtext', $deleted, $loglink );
1548
1549                                 $wgOut->addHTML( '<p>' . $text . "</p>\n" );
1550                                 $wgOut->returnToMain( false );
1551                                 wfRunHooks('ArticleDeleteComplete', $this, $wgUser, $reason);
1552                         } else {
1553                                 $wgOut->fatalError( wfMsg( 'cannotdelete' ) );
1554                         }
1555                 }
1556         }
1557
1558         /**
1559          * Back-end article deletion
1560          * Deletes the article with database consistency, writes logs, purges caches
1561          * Returns success
1562          */
1563         function doDeleteArticle( $reason ) {
1564                 global $wgUser;
1565                 global  $wgUseSquid, $wgDeferredUpdateList, $wgInternalServer, $wgPostCommitUpdateList;
1566
1567                 $fname = 'Article::doDeleteArticle';
1568                 wfDebug( $fname."\n" );
1569
1570                 $dbw =& wfGetDB( DB_MASTER );
1571                 $ns = $this->mTitle->getNamespace();
1572                 $t = $this->mTitle->getDBkey();
1573                 $id = $this->mTitle->getArticleID();
1574
1575                 if ( $t == '' || $id == 0 ) {
1576                         return false;
1577                 }
1578
1579                 $u = new SiteStatsUpdate( 0, 1, -$this->isCountable( $this->getContent( true ) ) );
1580                 array_push( $wgDeferredUpdateList, $u );
1581
1582                 $linksTo = $this->mTitle->getLinksTo();
1583
1584                 # Squid purging
1585                 if ( $wgUseSquid ) {
1586                         $urls = array(
1587                                 $this->mTitle->getInternalURL(),
1588                                 $this->mTitle->getInternalURL( 'history' )
1589                         );
1590                         foreach ( $linksTo as $linkTo ) {
1591                                 $urls[] = $linkTo->getInternalURL();
1592                         }
1593
1594                         $u = new SquidUpdate( $urls );
1595                         array_push( $wgPostCommitUpdateList, $u );
1596
1597                 }
1598
1599                 # Client and file cache invalidation
1600                 Title::touchArray( $linksTo );
1601
1602                 # Move article and history to the "archive" table
1603
1604                 $dbw->insertSelect( 'archive', array( 'page','revision', 'text' ),
1605                         array(
1606                                 'ar_namespace' => 'page_namespace',
1607                                 'ar_title' => 'page_title',
1608                                 'ar_text' => 'old_text',
1609                                 'ar_comment' => 'rev_comment',
1610                                 'ar_user' => 'rev_user',
1611                                 'ar_user_text' => 'rev_user_text',
1612                                 'ar_timestamp' => 'rev_timestamp',
1613                                 'ar_minor_edit' => 'rev_minor_edit',
1614                                 'ar_flags' => 0,
1615                         ), array(
1616                                 'page_namespace' => $ns,
1617                                 'page_title' => $t,
1618                                 'page_id = rev_page AND old_id = rev_id'
1619                         ), $fname
1620                 );
1621
1622                 # Now that it's safely backed up, delete it
1623
1624                 $dbw->deleteJoin( 'text', 'revision', 'old_id', 'rev_id', array( "rev_page = {$id}" ), $fname );
1625                 $dbw->delete( 'revision', array( 'rev_page' => $id ), $fname );
1626                 $dbw->delete( 'page', array( 'page_id' => $id ), $fname);
1627
1628                 $dbw->delete( 'recentchanges', array( 'rc_namespace' => $ns, 'rc_title' => $t ), $fname );
1629
1630                 # Finally, clean up the link tables
1631                 $t = $this->mTitle->getPrefixedDBkey();
1632
1633                 Article::onArticleDelete( $this->mTitle );
1634
1635                 # Insert broken links
1636                 $brokenLinks = array();
1637                 foreach ( $linksTo as $titleObj ) {
1638                         # Get article ID. Efficient because it was loaded into the cache by getLinksTo().
1639                         $linkID = $titleObj->getArticleID();
1640                         $brokenLinks[] = array( 'bl_from' => $linkID, 'bl_to' => $t );
1641                 }
1642                 $dbw->insert( 'brokenlinks', $brokenLinks, $fname, 'IGNORE' );
1643
1644                 # Delete live links
1645                 $dbw->delete( 'links', array( 'l_to' => $id ) );
1646                 $dbw->delete( 'links', array( 'l_from' => $id ) );
1647                 $dbw->delete( 'imagelinks', array( 'il_from' => $id ) );
1648                 $dbw->delete( 'brokenlinks', array( 'bl_from' => $id ) );
1649                 $dbw->delete( 'categorylinks', array( 'cl_from' => $id ) );
1650
1651                 # Log the deletion
1652                 $log = new LogPage( 'delete' );
1653                 $log->addEntry( 'delete', $this->mTitle, $reason );
1654
1655                 # Clear the cached article id so the interface doesn't act like we exist
1656                 $this->mTitle->resetArticleID( 0 );
1657                 $this->mTitle->mArticleID = 0;
1658                 return true;
1659         }
1660
1661         /**
1662          * Revert a modification
1663          */
1664         function rollback() {
1665                 global $wgUser, $wgOut, $wgRequest;
1666                 $fname = 'Article::rollback';
1667
1668                 if ( ! $wgUser->isAllowed('rollback') ) {
1669                         $wgOut->sysopRequired();
1670                         return;
1671                 }
1672                 if ( wfReadOnly() ) {
1673                         $wgOut->readOnlyPage( $this->getContent( true ) );
1674                         return;
1675                 }
1676                 if( !$wgUser->matchEditToken( $wgRequest->getVal( 'token' ),
1677                         array( $this->mTitle->getPrefixedText(),
1678                                 $wgRequest->getVal( 'from' ) )  ) ) {
1679                         $wgOut->setPageTitle( wfMsg( 'rollbackfailed' ) );
1680                         $wgOut->addWikiText( wfMsg( 'sessionfailure' ) );
1681                         return;
1682                 }
1683                 $dbw =& wfGetDB( DB_MASTER );
1684
1685                 # Enhanced rollback, marks edits rc_bot=1
1686                 $bot = $wgRequest->getBool( 'bot' );
1687
1688                 # Replace all this user's current edits with the next one down
1689                 $tt = $this->mTitle->getDBKey();
1690                 $n = $this->mTitle->getNamespace();
1691
1692                 # Get the last editor, lock table exclusively
1693                 $s = $dbw->selectRow( array( 'page', 'revision' ),
1694                         array( 'page_id','rev_user','rev_user_text','rev_comment' ),
1695                         array( 'page_title' => $tt, 'page_namespace' => $n ),
1696                         $fname, 'FOR UPDATE'
1697                 );
1698                 if( $s === false ) {
1699                         # Something wrong
1700                         $wgOut->addHTML( wfMsg( 'notanarticle' ) );
1701                         return;
1702                 }
1703                 $ut = $dbw->strencode( $s->cur_user_text );
1704                 $uid = $s->rev_user;
1705                 $pid = $s->page_id;
1706
1707                 $from = str_replace( '_', ' ', $wgRequest->getVal( 'from' ) );
1708                 if( $from != $s->rev_user_text ) {
1709                         $wgOut->setPageTitle(wfmsg('rollbackfailed'));
1710                         $wgOut->addWikiText( wfMsg( 'alreadyrolled',
1711                                 htmlspecialchars( $this->mTitle->getPrefixedText()),
1712                                 htmlspecialchars( $from ),
1713                                 htmlspecialchars( $s->rev_user_text ) ) );
1714                         if($s->rev_comment != '') {
1715                                 $wgOut->addHTML(
1716                                         wfMsg('editcomment',
1717                                         htmlspecialchars( $s->rev_comment ) ) );
1718                         }
1719                         return;
1720                 }
1721
1722                 # Get the last edit not by this guy
1723                 $s = $dbw->selectRow( 'old',
1724                         array( 'old_text','old_user','old_user_text','old_timestamp','old_flags' ),
1725                         array(
1726                                 'old_namespace' => $n,
1727                                 'old_title' => $tt,
1728                                 "old_user <> {$uid} OR old_user_text <> '{$ut}'"
1729                         ), $fname, array( 'FOR UPDATE', 'USE INDEX' => 'name_title_timestamp' )
1730                 );
1731                 if( $s === false ) {
1732                         # Something wrong
1733                         $wgOut->setPageTitle(wfMsg('rollbackfailed'));
1734                         $wgOut->addHTML( wfMsg( 'cantrollback' ) );
1735                         return;
1736                 }
1737
1738                 if ( $bot ) {
1739                         # Mark all reverted edits as bot
1740                         $dbw->update( 'recentchanges',
1741                                 array( /* SET */
1742                                         'rc_bot' => 1
1743                                 ), array( /* WHERE */
1744                                         'rc_user' => $uid,
1745                                         "rc_timestamp > '{$s->old_timestamp}'",
1746                                 ), $fname
1747                         );
1748                 }
1749
1750                 # Save it!
1751                 $newcomment = wfMsg( 'revertpage', $s->old_user_text, $from );
1752                 $wgOut->setPagetitle( wfMsg( 'actioncomplete' ) );
1753                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
1754                 $wgOut->addHTML( '<h2>' . htmlspecialchars( $newcomment ) . "</h2>\n<hr />\n" );
1755                 $this->updateArticle( Revision::getRevisionText( $s ), $newcomment, 1, $this->mTitle->userIsWatching(), $bot );
1756                 Article::onArticleEdit( $this->mTitle );
1757                 $wgOut->returnToMain( false );
1758         }
1759
1760
1761         /**
1762          * Do standard deferred updates after page view
1763          * @private
1764          */
1765         function viewUpdates() {
1766                 global $wgDeferredUpdateList;
1767
1768                 if ( 0 != $this->getID() ) {
1769                         global $wgDisableCounters;
1770                         if( !$wgDisableCounters ) {
1771                                 Article::incViewCount( $this->getID() );
1772                                 $u = new SiteStatsUpdate( 1, 0, 0 );
1773                                 array_push( $wgDeferredUpdateList, $u );
1774                         }
1775                 }
1776
1777                 # Update newtalk status if user is reading their own
1778                 # talk page
1779
1780                 global $wgUser;
1781                 if ($this->mTitle->getNamespace() == NS_USER_TALK &&
1782                         $this->mTitle->getText() == $wgUser->getName()) {
1783                         require_once( 'UserTalkUpdate.php' );
1784                         $u = new UserTalkUpdate( 0, $this->mTitle->getNamespace(), $this->mTitle->getDBkey(), false, false, false );
1785                 }
1786         }
1787
1788         /**
1789          * Do standard deferred updates after page edit.
1790          * Every 1000th edit, prune the recent changes table.
1791          * @private
1792          * @param string $text
1793          */
1794         function editUpdates( $text, $summary, $minoredit, $timestamp_of_pagechange) {
1795                 global $wgDeferredUpdateList, $wgDBname, $wgMemc;
1796                 global $wgMessageCache, $wgUser;
1797
1798                 wfSeedRandom();
1799                 if ( 0 == mt_rand( 0, 999 ) ) {
1800                         # Periodically flush old entries from the recentchanges table.
1801                         global $wgRCMaxAge;
1802                         $dbw =& wfGetDB( DB_MASTER );
1803                         $cutoff = $dbw->timestamp( time() - $wgRCMaxAge );
1804                         $recentchanges = $dbw->tableName( 'recentchanges' );
1805                         $sql = "DELETE FROM $recentchanges WHERE rc_timestamp < '{$cutoff}'";
1806                         $dbw->query( $sql );
1807                 }
1808                 $id = $this->getID();
1809                 $title = $this->mTitle->getPrefixedDBkey();
1810                 $shortTitle = $this->mTitle->getDBkey();
1811
1812                 $adj = $this->mCountAdjustment;
1813
1814                 if ( 0 != $id ) {
1815                         $u = new LinksUpdate( $id, $title );
1816                         array_push( $wgDeferredUpdateList, $u );
1817                         $u = new SiteStatsUpdate( 0, 1, $adj );
1818                         array_push( $wgDeferredUpdateList, $u );
1819                         $u = new SearchUpdate( $id, $title, $text );
1820                         array_push( $wgDeferredUpdateList, $u );
1821
1822                         # If this is another user's talk page,
1823                         # create a watchlist entry for this page
1824
1825                         if ($this->mTitle->getNamespace() == NS_USER_TALK &&
1826                                 $shortTitle != $wgUser->getName()) {
1827                                 require_once( 'UserTalkUpdate.php' );
1828                                 $u = new UserTalkUpdate( 1, $this->mTitle->getNamespace(), $shortTitle, $summary, $minoredit, $timestamp_of_pagechange);
1829                         }
1830
1831                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
1832                                 $wgMessageCache->replace( $shortTitle, $text );
1833                         }
1834                 }
1835         }
1836
1837         /**
1838          * @todo document this function
1839          * @private
1840          * @param string $oldid         Revision ID of this article revision
1841          */
1842         function setOldSubtitle( $oldid=0 ) {
1843                 global $wgLang, $wgOut, $wgUser;
1844
1845                 $td = $wgLang->timeanddate( $this->mTimestamp, true );
1846                 $sk = $wgUser->getSkin();
1847                 $lnk = $sk->makeKnownLinkObj ( $this->mTitle, wfMsg( 'currentrevisionlink' ) );
1848                 $prevlink = $sk->makeKnownLinkObj( $this->mTitle, wfMsg( 'previousrevision' ), 'direction=prev&oldid='.$oldid );
1849                 $nextlink = $sk->makeKnownLinkObj( $this->mTitle, wfMsg( 'nextrevision' ), 'direction=next&oldid='.$oldid );
1850                 $r = wfMsg( 'revisionasofwithlink', $td, $lnk, $prevlink, $nextlink );
1851                 $wgOut->setSubtitle( $r );
1852         }
1853
1854         /**
1855          * This function is called right before saving the wikitext,
1856          * so we can do things like signatures and links-in-context.
1857          *
1858          * @param string $text
1859          */
1860         function preSaveTransform( $text ) {
1861                 global $wgParser, $wgUser;
1862                 return $wgParser->preSaveTransform( $text, $this->mTitle, $wgUser, ParserOptions::newFromUser( $wgUser ) );
1863         }
1864
1865         /* Caching functions */
1866
1867         /**
1868          * checkLastModified returns true if it has taken care of all
1869          * output to the client that is necessary for this request.
1870          * (that is, it has sent a cached version of the page)
1871          */
1872         function tryFileCache() {
1873                 static $called = false;
1874                 if( $called ) {
1875                         wfDebug( " tryFileCache() -- called twice!?\n" );
1876                         return;
1877                 }
1878                 $called = true;
1879                 if($this->isFileCacheable()) {
1880                         $touched = $this->mTouched;
1881                         $cache = new CacheManager( $this->mTitle );
1882                         if($cache->isFileCacheGood( $touched )) {
1883                                 global $wgOut;
1884                                 wfDebug( " tryFileCache() - about to load\n" );
1885                                 $cache->loadFromFileCache();
1886                                 return true;
1887                         } else {
1888                                 wfDebug( " tryFileCache() - starting buffer\n" );
1889                                 ob_start( array(&$cache, 'saveToFileCache' ) );
1890                         }
1891                 } else {
1892                         wfDebug( " tryFileCache() - not cacheable\n" );
1893                 }
1894         }
1895
1896         /**
1897          * Check if the page can be cached
1898          * @return bool
1899          */
1900         function isFileCacheable() {
1901                 global $wgUser, $wgUseFileCache, $wgShowIPinHeader, $wgRequest;
1902                 extract( $wgRequest->getValues( 'action', 'oldid', 'diff', 'redirect', 'printable' ) );
1903
1904                 return $wgUseFileCache
1905                         and (!$wgShowIPinHeader)
1906                         and ($this->getID() != 0)
1907                         and ($wgUser->isAnon())
1908                         and (!$wgUser->getNewtalk())
1909                         and ($this->mTitle->getNamespace() != NS_SPECIAL )
1910                         and (empty( $action ) || $action == 'view')
1911                         and (!isset($oldid))
1912                         and (!isset($diff))
1913                         and (!isset($redirect))
1914                         and (!isset($printable))
1915                         and (!$this->mRedirectedFrom);
1916         }
1917
1918         /**
1919          * Loads cur_touched and returns a value indicating if it should be used
1920          *
1921          */
1922         function checkTouched() {
1923                 $fname = 'Article::checkTouched';
1924                 $id = $this->getID();
1925                 $dbr =& $this->getDB();
1926                 $s = $dbr->selectRow( 'page', array( 'page_touched', 'page_is_redirect' ),
1927                         array( 'page_id' => $id ), $fname, $this->getSelectOptions() );
1928                 if( $s !== false ) {
1929                         $this->mTouched = wfTimestamp( TS_MW, $s->page_touched );
1930                         return !$s->page_is_redirect;
1931                 } else {
1932                         return false;
1933                 }
1934         }
1935
1936         /**
1937          * Edit an article without doing all that other stuff
1938          *
1939          * @param string $text text submitted
1940          * @param string $comment comment submitted
1941          * @param integer $minor whereas it's a minor modification
1942          */
1943         function quickEdit( $text, $comment = '', $minor = 0 ) {
1944                 global $wgUser;
1945                 $fname = 'Article::quickEdit';
1946
1947                 #wfDebugDieBacktrace( "$fname called." );
1948
1949                 wfProfileIn( $fname );
1950
1951                 $dbw =& wfGetDB( DB_MASTER );
1952                 $ns = $this->mTitle->getNamespace();
1953                 $dbkey = $this->mTitle->getDBkey();
1954                 $encDbKey = $dbw->strencode( $dbkey );
1955                 $timestamp = $dbw->timestamp();
1956                 # insert new text
1957                 $dbw->insert( 'text', array(
1958                                 'old_text' => $text,
1959                                 'old_flags' => "" ), $fname );
1960                 $text_id = $dbw->insertID();
1961
1962                 # update page
1963                 $dbw->update( 'page', array(
1964                         'page_is_new' => 0,
1965                         'page_touched' => $timestamp,
1966                         'page_is_redirect' => $this->isRedirect( $text ) ? 1 : 0,
1967                         'page_latest' => $text_id ),
1968                         array( 'page_namespace' => $ns, 'page_title' => $dbkey ), $fname );
1969                 # Retrieve page ID
1970                 $page_id = $dbw->selectField( 'page', 'page_id', array( 'page_namespace' => $ns, 'page_title' => $dbkey ), $fname );
1971
1972                 # update revision
1973                 $dbw->insert( 'revision', array(
1974                         'rev_id' => $text_id,
1975                         'rev_page' => $page_id,
1976                         'rev_comment' => $comment,
1977                         'rev_user' => $wgUser->getID(),
1978                         'rev_user_text' => $wgUser->getName(),
1979                         'rev_timestamp' => $timestamp,
1980                         'rev_minor_edit' => intval($minor) ),
1981                         $fname );
1982                 wfProfileOut( $fname );
1983         }
1984
1985         /**
1986          * Used to increment the view counter
1987          *
1988          * @static
1989          * @param integer $id article id
1990          */
1991         function incViewCount( $id ) {
1992                 $id = intval( $id );
1993                 global $wgHitcounterUpdateFreq;
1994
1995                 $dbw =& wfGetDB( DB_MASTER );
1996                 $pageTable = $dbw->tableName( 'page' );
1997                 $hitcounterTable = $dbw->tableName( 'hitcounter' );
1998                 $acchitsTable = $dbw->tableName( 'acchits' );
1999
2000                 if( $wgHitcounterUpdateFreq <= 1 ){ //
2001                         $dbw->query( "UPDATE $pageTable SET page_counter = page_counter + 1 WHERE page_id = $id" );
2002                         return;
2003                 }
2004
2005                 # Not important enough to warrant an error page in case of failure
2006                 $oldignore = $dbw->ignoreErrors( true );
2007
2008                 $dbw->query( "INSERT INTO $hitcounterTable (hc_id) VALUES ({$id})" );
2009
2010                 $checkfreq = intval( $wgHitcounterUpdateFreq/25 + 1 );
2011                 if( (rand() % $checkfreq != 0) or ($dbw->lastErrno() != 0) ){
2012                         # Most of the time (or on SQL errors), skip row count check
2013                         $dbw->ignoreErrors( $oldignore );
2014                         return;
2015                 }
2016
2017                 $res = $dbw->query("SELECT COUNT(*) as n FROM $hitcounterTable");
2018                 $row = $dbw->fetchObject( $res );
2019                 $rown = intval( $row->n );
2020                 if( $rown >= $wgHitcounterUpdateFreq ){
2021                         wfProfileIn( 'Article::incViewCount-collect' );
2022                         $old_user_abort = ignore_user_abort( true );
2023
2024                         $dbw->query("LOCK TABLES $hitcounterTable WRITE");
2025                         $dbw->query("CREATE TEMPORARY TABLE $acchitsTable TYPE=HEAP ".
2026                                 "SELECT hc_id,COUNT(*) AS hc_n FROM $hitcounterTable ".
2027                                 'GROUP BY hc_id');
2028                         $dbw->query("DELETE FROM $hitcounterTable");
2029                         $dbw->query('UNLOCK TABLES');
2030                         $dbw->query("UPDATE $curTable,$acchitsTable SET cur_counter=cur_counter + hc_n ".
2031                                 'WHERE cur_id = hc_id');
2032                         $dbw->query("DROP TABLE $acchitsTable");
2033
2034                         ignore_user_abort( $old_user_abort );
2035                         wfProfileOut( 'Article::incViewCount-collect' );
2036                 }
2037                 $dbw->ignoreErrors( $oldignore );
2038         }
2039
2040         /**#@+
2041          * The onArticle*() functions are supposed to be a kind of hooks
2042          * which should be called whenever any of the specified actions
2043          * are done.
2044          *
2045          * This is a good place to put code to clear caches, for instance.
2046          *
2047          * This is called on page move and undelete, as well as edit
2048          * @static
2049          * @param $title_obj a title object
2050          */
2051
2052         function onArticleCreate($title_obj) {
2053                 global $wgUseSquid, $wgPostCommitUpdateList;
2054
2055                 $titles = $title_obj->getBrokenLinksTo();
2056
2057                 # Purge squid
2058                 if ( $wgUseSquid ) {
2059                         $urls = $title_obj->getSquidURLs();
2060                         foreach ( $titles as $linkTitle ) {
2061                                 $urls[] = $linkTitle->getInternalURL();
2062                         }
2063                         $u = new SquidUpdate( $urls );
2064                         array_push( $wgPostCommitUpdateList, $u );
2065                 }
2066
2067                 # Clear persistent link cache
2068                 LinkCache::linksccClearBrokenLinksTo( $title_obj->getPrefixedDBkey() );
2069         }
2070
2071         function onArticleDelete($title_obj) {
2072                 LinkCache::linksccClearLinksTo( $title_obj->getArticleID() );
2073         }
2074         function onArticleEdit($title_obj) {
2075                 LinkCache::linksccClearPage( $title_obj->getArticleID() );
2076         }
2077         /**#@-*/
2078
2079         /**
2080          * Info about this page
2081          * Called for ?action=info when $wgAllowPageInfo is on.
2082          *
2083          * @access public
2084          */
2085         function info() {
2086                 global $wgLang, $wgOut, $wgAllowPageInfo;
2087                 $fname = 'Article::info';
2088
2089                 if ( !$wgAllowPageInfo ) {
2090                         $wgOut->errorpage( 'nosuchaction', 'nosuchactiontext' );
2091                         return;
2092                 }
2093
2094                 $page = $this->mTitle->getSubjectPage();
2095
2096                 $wgOut->setPagetitle( $page->getPrefixedText() );
2097                 $wgOut->setSubtitle( wfMsg( 'infosubtitle' ));
2098
2099                 # first, see if the page exists at all.
2100                 $exists = $page->getArticleId() != 0;
2101                 if( !$exists ) {
2102                         $wgOut->addHTML( wfMsg('noarticletext') );
2103                 } else {
2104                         $dbr =& $this->getDB( DB_SLAVE );
2105                         $wl_clause = array(
2106                                 'wl_title'     => $page->getDBkey(),
2107                                 'wl_namespace' => $page->getNamespace() );
2108                         $numwatchers = $dbr->selectField(
2109                                 'watchlist',
2110                                 'COUNT(*)',
2111                                 $wl_clause,
2112                                 $fname,
2113                                 $this->getSelectOptions() );
2114
2115                         $pageInfo = $this->pageCountInfo( $page );
2116                         $talkInfo = $this->pageCountInfo( $page->getTalkPage() );
2117
2118                         $wgOut->addHTML( "<ul><li>" . wfMsg("numwatchers", $wgLang->formatNum( $numwatchers ) ) . '</li>' );
2119                         $wgOut->addHTML( "<li>" . wfMsg('numedits', $wgLang->formatNum( $pageInfo['edits'] ) ) . '</li>');
2120                         if( $talkInfo ) {
2121                                 $wgOut->addHTML( '<li>' . wfMsg("numtalkedits", $wgLang->formatNum( $talkInfo['edits'] ) ) . '</li>');
2122                         }
2123                         $wgOut->addHTML( '<li>' . wfMsg("numauthors", $wgLang->formatNum( $pageInfo['authors'] ) ) . '</li>' );
2124                         if( $talkInfo ) {
2125                                 $wgOut->addHTML( '<li>' . wfMsg('numtalkauthors', $wgLang->formatNum( $talkInfo['authors'] ) ) . '</li>' );
2126                         }
2127                         $wgOut->addHTML( '</ul>' );
2128
2129                 }
2130         }
2131
2132         /**
2133          * Return the total number of edits and number of unique editors
2134          * on a given page. If page does not exist, returns false.
2135          *
2136          * @param Title $title
2137          * @return array
2138          * @access private
2139          */
2140         function pageCountInfo( $title ) {
2141                 $id = $title->getArticleId();
2142                 if( $id == 0 ) {
2143                         return false;
2144                 }
2145
2146                 $dbr =& $this->getDB( DB_SLAVE );
2147
2148                 $rev_clause = array( 'rev_page' => $id );
2149                 $fname = 'Article::pageCountInfo';
2150
2151                 $edits = $dbr->selectField(
2152                         'revision',
2153                         'COUNT(rev_page)',
2154                         $rev_clause,
2155                         $fname,
2156                         $this->getSelectOptions() );
2157
2158                 $authors = $dbr->selectField(
2159                         'revision',
2160                         'COUNT(DISTINCT rev_user_text)',
2161                         $rev_clause,
2162                         $fname,
2163                         $this->getSelectOptions() );
2164
2165                 return array( 'edits' => $edits, 'authors' => $authors );
2166         }
2167 }
2168
2169 /**
2170  * Check whether an article is a stub
2171  *
2172  * @public
2173  * @param integer $articleID    ID of the article that is to be checked
2174  */
2175 function wfArticleIsStub( $articleID ) {
2176         global $wgUser;
2177         $fname = 'wfArticleIsStub';
2178
2179         wfDebugDieBacktrace( 'This function seems to be unused. Pending removal.' );
2180
2181         $threshold = $wgUser->getOption('stubthreshold') ;
2182         if ( $threshold > 0 ) {
2183                 $dbr =& wfGetDB( DB_SLAVE );
2184                 $s = $dbr->selectRow( array('page', 'text'),
2185                         array( 'LENGTH(old_text) AS len', 'page_namespace', 'page_is_redirect' ),
2186                         array( 'page_id' => $articleID, "page.page_latest=text.old_id" ),
2187                         $fname ) ;
2188                 if ( $s == false OR $s->page_is_redirect OR $s->page_namespace != NS_MAIN ) {
2189                         return false;
2190                 }
2191                 $size = $s->len;
2192                 return ( $size < $threshold );
2193         }
2194         return false;
2195 }
2196
2197 ?>