includes/Article.php

   1 <?php
   2 # Class representing a Wikipedia article and history.
   3 # See design.doc for an overview.
   4
   5 # Note: edit user interface and cache support functions have been
   6 # moved to separate EditPage and CacheManager classes.
   7
   8 include_once( "CacheManager.php" );
   9
  10 class Article {
  11         /* private */ var $mContent, $mContentLoaded;
  12         /* private */ var $mUser, $mTimestamp, $mUserText;
  13         /* private */ var $mCounter, $mComment, $mCountAdjustment;
  14         /* private */ var $mMinorEdit, $mRedirectedFrom;
  15         /* private */ var $mTouched, $mFileCache, $mTitle;
  16         /* private */ var $mId, $mTable;
  17
  18         function Article( &$title ) {
  19                 $this->mTitle =& $title;
  20                 $this->clear();
  21         }
  22
  23         /* private */ function clear()
  24         {
  25                 $this->mContentLoaded = false;
  26                 $this->mCurID = $this->mUser = $this->mCounter = -1; # Not loaded
  27                 $this->mRedirectedFrom = $this->mUserText =
  28                 $this->mTimestamp = $this->mComment = $this->mFileCache = "";
  29                 $this->mCountAdjustment = 0;
  30                 $this->mTouched = "19700101000000";
  31         }
  32
  33         /* static */ function getRevisionText( $row, $prefix = "old_" ) {
  34                 # Deal with optional compression of archived pages.
  35                 # This can be done periodically via maintenance/compressOld.php, and
  36                 # as pages are saved if $wgCompressRevisions is set.
  37                 $text = $prefix . "text";
  38                 $flags = $prefix . "flags";
  39                 if( isset( $row->$flags ) && (false !== strpos( $row->$flags, "gzip" ) ) ) {
  40                         return gzinflate( $row->$text );
  41                 }
  42                 if( isset( $row->$text ) ) {
  43                         return $row->$text;
  44                 }
  45                 return false;
  46         }
  47
  48         /* static */ function compressRevisionText( &$text ) {
  49                 global $wgCompressRevisions;
  50                 if( !$wgCompressRevisions ) {
  51                         return "";
  52                 }
  53                 if( !function_exists( "gzdeflate" ) ) {
  54                         wfDebug( "Article::compressRevisionText() -- no zlib support, not compressing\n" );
  55                         return "";
  56                 }
  57                 $text = gzdeflate( $text );
  58                 return "gzip";
  59         }
  60
  61         # Note that getContent/loadContent may follow redirects if
  62         # not told otherwise, and so may cause a change to mTitle.
  63
  64         # Return the text of this revision
  65         function getContent( $noredir = false )
  66         {
  67                 global $action,$section,$count; # From query string
  68                 $fname =  "Article::getContent";
  69                 wfProfileIn( $fname );
  70
  71                 if ( 0 == $this->getID() ) {
  72                         if ( "edit" == $action ) {
  73                                 wfProfileOut( $fname );
  74                                 return ""; # was "newarticletext", now moved above the box)
  75                         }
  76                         wfProfileOut( $fname );
  77                         return wfMsg( "noarticletext" );
  78                 } else {
  79                         $this->loadContent( $noredir );
  80
  81                         if(
  82                                 # check if we're displaying a [[User talk:x.x.x.x]] anonymous talk page
  83                                 ( $this->mTitle->getNamespace() == Namespace::getTalk( Namespace::getUser()) ) &&
  84                                   preg_match("/^\d{1,3}\.\d{1,3}.\d{1,3}\.\d{1,3}$/",$this->mTitle->getText()) &&
  85                                   $action=="view"
  86                                 )
  87                                 {
  88                                 wfProfileOut( $fname );
  89                                 return $this->mContent . "\n" .wfMsg("anontalkpagetext"); }
  90                         else {
  91                                 if($action=="edit") {
  92                                         if($section!="") {
  93                                                 if($section=="new") {
  94                                                         wfProfileOut( $fname );
  95                                                         return "";
  96                                                 }
  97
  98                                                 $secs=preg_split("/(^=+.*?=+|^<h[1-6].*?>.*?<\/h[1-6].*?>)/mi",
  99                                                  $this->mContent, -1,
 100                                                  PREG_SPLIT_DELIM_CAPTURE);
 101                                                 if($section==0) {
 102                                                         wfProfileOut( $fname );
 103                                                         return trim($secs[0]);
 104                                                 } else {
 105                                                         wfProfileOut( $fname );
 106                                                         return trim($secs[$section*2-1] . $secs[$section*2]);
 107                                                 }
 108                                         }
 109                                 }
 110                                 wfProfileOut( $fname );
 111                                 return $this->mContent;
 112                         }
 113                 }
 114         }
 115
 116         # Load the revision (including cur_text) into this object
 117         function loadContent( $noredir = false )
 118         {
 119                 global $wgOut, $wgMwRedir;
 120                 global $oldid, $redirect; # From query
 121
 122                 if ( $this->mContentLoaded ) return;
 123                 $fname = "Article::loadContent";
 124                 $success = true;
 125
 126                 if ( ! $oldid ) {       # Retrieve current version
 127                         $id = $this->getID();
 128                         if ( 0 == $id ) return;
 129
 130                         $sql = "SELECT " .
 131                           "cur_text,cur_timestamp,cur_user,cur_counter,cur_restrictions,cur_touched " .
 132                           "FROM cur WHERE cur_id={$id}";
 133                         wfDebug( "$sql\n" );
 134                         $res = wfQuery( $sql, DB_READ, $fname );
 135                         if ( 0 == wfNumRows( $res ) ) {
 136                                 return;
 137                         }
 138
 139                         $s = wfFetchObject( $res );
 140                         # If we got a redirect, follow it (unless we've been told
 141                         # not to by either the function parameter or the query
 142                         if ( ( "no" != $redirect ) && ( false == $noredir ) &&
 143                           ( $wgMwRedir->matchStart( $s->cur_text ) ) ) {
 144                                 if ( preg_match( "/\\[\\[([^\\]\\|]+)[\\]\\|]/",
 145                                   $s->cur_text, $m ) ) {
 146                                         $rt = Title::newFromText( $m[1] );
 147                                         if( $rt ) {
 148                                                 # Gotta hand redirects to special pages differently:
 149                                                 # Fill the HTTP response "Location" header and ignore
 150                                                 # the rest of the page we're on.
 151
 152                                                 if ( $rt->getInterwiki() != "" ) {
 153                                                         $wgOut->redirect( $rt->getFullURL() ) ;
 154                                                         return;
 155                                                 }
 156                                                 if ( $rt->getNamespace() == Namespace::getSpecial() ) {
 157                                                         $wgOut->redirect( $rt->getURL() );
 158                                                         return;
 159                                                 }
 160                                                 $rid = $rt->getArticleID();
 161                                                 if ( 0 != $rid ) {
 162                                                         $sql = "SELECT cur_text,cur_timestamp,cur_user," .
 163                                                           "cur_counter,cur_restrictions,cur_touched FROM cur WHERE cur_id={$rid}";
 164                                                         $res = wfQuery( $sql, DB_READ, $fname );
 165
 166                                                         if ( 0 != wfNumRows( $res ) ) {
 167                                                                 $this->mRedirectedFrom = $this->mTitle->getPrefixedText();
 168                                                                 $this->mTitle = $rt;
 169                                                                 $s = wfFetchObject( $res );
 170                                                         }
 171                                                 }
 172                                         }
 173                                 }
 174                         }
 175
 176                         $this->mContent = $s->cur_text;
 177                         $this->mUser = $s->cur_user;
 178                         $this->mCounter = $s->cur_counter;
 179                         $this->mTimestamp = $s->cur_timestamp;
 180                         $this->mTouched = $s->cur_touched;
 181                         $this->mTitle->mRestrictions = explode( ",", trim( $s->cur_restrictions ) );
 182                         $this->mTitle->mRestrictionsLoaded = true;
 183                         wfFreeResult( $res );
 184                 } else { # oldid set, retrieve historical version
 185                         $sql = "SELECT old_text,old_timestamp,old_user,old_flags FROM old " .
 186                           "WHERE old_id={$oldid}";
 187                         $res = wfQuery( $sql, DB_READ, $fname );
 188                         if ( 0 == wfNumRows( $res ) ) { return; }
 189
 190                         $s = wfFetchObject( $res );
 191                         $this->mContent = Article::getRevisionText( $s );
 192                         $this->mUser = $s->old_user;
 193                         $this->mCounter = 0;
 194                         $this->mTimestamp = $s->old_timestamp;
 195                         wfFreeResult( $res );
 196                 }
 197
 198                 # Return error message :P
 199                 # Horrible, confusing UI and data. I think this should return false on error -- TS
 200                 if ( !$success ) {
 201                         $t = $this->mTitle->getPrefixedText();
 202                         if ( isset( $oldid ) ) {
 203                                 $oldid = IntVal( $oldid );
 204                                 $t .= ",oldid={$oldid}";
 205                         }
 206                         if ( isset( $redirect ) ) {
 207                                 $redirect = ($redirect == "no") ? "no" : "yes";
 208                                 $t .= ",redirect={$redirect}";
 209                         }
 210                         $this->mContent = wfMsg( "missingarticle", $t );
 211                 }
 212
 213                 $this->mContentLoaded = true;
 214         }
 215
 216         function getID() {
 217                 if( $this->mTitle ) {
 218                         return $this->mTitle->getArticleID();
 219                 } else {
 220                         return 0;
 221                 }
 222         }
 223
 224         function getCount()
 225         {
 226                 if ( -1 == $this->mCounter ) {
 227                         $id = $this->getID();
 228                         $this->mCounter = wfGetSQL( "cur", "cur_counter", "cur_id={$id}" );
 229                 }
 230                 return $this->mCounter;
 231         }
 232
 233         # Would the given text make this article a "good" article (i.e.,
 234         # suitable for including in the article count)?
 235
 236         function isCountable( $text )
 237         {
 238                 global $wgUseCommaCount, $wgMwRedir;
 239
 240                 if ( 0 != $this->mTitle->getNamespace() ) { return 0; }
 241                 if ( $wgMwRedir->matchStart( $text ) ) { return 0; }
 242                 $token = ($wgUseCommaCount ? "," : "[[" );
 243                 if ( false === strstr( $text, $token ) ) { return 0; }
 244                 return 1;
 245         }
 246
 247         # Loads everything from cur except cur_text
 248         # This isn't necessary for all uses, so it's only done if needed.
 249
 250         /* private */ function loadLastEdit()
 251         {
 252                 global $wgOut;
 253                 if ( -1 != $this->mUser ) return;
 254
 255                 $sql = "SELECT cur_user,cur_user_text,cur_timestamp," .
 256                   "cur_comment,cur_minor_edit FROM cur WHERE " .
 257                   "cur_id=" . $this->getID();
 258                 $res = wfQuery( $sql, DB_READ, "Article::loadLastEdit" );
 259
 260                 if ( wfNumRows( $res ) > 0 ) {
 261                         $s = wfFetchObject( $res );
 262                         $this->mUser = $s->cur_user;
 263                         $this->mUserText = $s->cur_user_text;
 264                         $this->mTimestamp = $s->cur_timestamp;
 265                         $this->mComment = $s->cur_comment;
 266                         $this->mMinorEdit = $s->cur_minor_edit;
 267                 }
 268         }
 269
 270         function getTimestamp()
 271         {
 272                 $this->loadLastEdit();
 273                 return $this->mTimestamp;
 274         }
 275
 276         function getUser()
 277         {
 278                 $this->loadLastEdit();
 279                 return $this->mUser;
 280         }
 281
 282         function getUserText()
 283         {
 284                 $this->loadLastEdit();
 285                 return $this->mUserText;
 286         }
 287
 288         function getComment()
 289         {
 290                 $this->loadLastEdit();
 291                 return $this->mComment;
 292         }
 293
 294         function getMinorEdit()
 295         {
 296                 $this->loadLastEdit();
 297                 return $this->mMinorEdit;
 298         }
 299
 300         # This is the default action of the script: just view the page of
 301         # the given title.
 302
 303         function view()
 304         {
 305                 global $wgUser, $wgOut, $wgLang;
 306                 global $oldid, $diff, $printable; # From query
 307                 global $wgLinkCache, $IP, $wgEnableParserCache;
 308
 309                 $fname = "Article::view";
 310                 wfProfileIn( $fname );
 311
 312                 $wgOut->setArticleFlag( true );
 313                 $wgOut->setRobotpolicy( "index,follow" );
 314
 315                 # If we got diff and oldid in the query, we want to see a
 316                 # diff page instead of the article.
 317
 318                 if ( isset( $diff ) ) {
 319                         $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
 320                         $de = new DifferenceEngine( $oldid, $diff );
 321                         $de->showDiffPage();
 322                         wfProfileOut( $fname );
 323                         return;
 324                 }
 325
 326                 if ( !isset( $oldid ) and $this->checkTouched() ) {
 327                         if( $wgOut->checkLastModified( $this->mTouched ) ){
 328                                 return;
 329                         } else if ( $this->tryFileCache() ) {
 330                                 # tell wgOut that output is taken care of
 331                                 $wgOut->disable();
 332                                 $this->viewUpdates();
 333                                 return;
 334                         }
 335                 }
 336
 337                 $text = $this->getContent(); # May change mTitle
 338                 $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
 339                 $wgOut->setHTMLTitle( $this->mTitle->getPrefixedText() .
 340                   " - " . wfMsg( "wikititlesuffix" ) );
 341
 342                 # We're looking at an old revision
 343
 344                 if ( $oldid ) {
 345                         $this->setOldSubtitle();
 346                         $wgOut->setRobotpolicy( "noindex,follow" );
 347                 }
 348                 if ( "" != $this->mRedirectedFrom ) {
 349                         $sk = $wgUser->getSkin();
 350                         $redir = $sk->makeKnownLink( $this->mRedirectedFrom, "",
 351                           "redirect=no" );
 352                         $s = wfMsg( "redirectedfrom", $redir );
 353                         $wgOut->setSubtitle( $s );
 354                 }
 355
 356                 $wgLinkCache->preFill( $this->mTitle );
 357
 358                 if ( $printable == "yes" ) {
 359                         $wgOut->mParserOptions->setPrintable( true );
 360                 }
 361
 362                 if( $wgEnableParserCache && intval($wgUser->getOption( "stubthreshold" )) == 0 ){
 363                         $wgOut->addWikiText( $text, true, $this );
 364                 } else {
 365                         $wgOut->addWikiText( $text );
 366                 }
 367
 368                 $this->viewUpdates();
 369                 wfProfileOut( $fname );
 370         }
 371
 372         # Theoretically we could defer these whole insert and update
 373         # functions for after display, but that's taking a big leap
 374         # of faith, and we want to be able to report database
 375         # errors at some point.
 376
 377         /* private */ function insertNewArticle( $text, $summary, $isminor, $watchthis )
 378         {
 379                 global $wgOut, $wgUser, $wgLinkCache, $wgMwRedir;
 380                 global $wgUseSquid, $wgDeferredUpdateList, $wgInternalServer;
 381
 382                 $fname = "Article::insertNewArticle";
 383
 384                 $this->mCountAdjustment = $this->isCountable( $text );
 385
 386                 $ns = $this->mTitle->getNamespace();
 387                 $ttl = $this->mTitle->getDBkey();
 388                 $text = $this->preSaveTransform( $text );
 389                 if ( $wgMwRedir->matchStart( $text ) ) { $redir = 1; }
 390                 else { $redir = 0; }
 391
 392                 $now = wfTimestampNow();
 393                 $won = wfInvertTimestamp( $now );
 394                 wfSeedRandom();
 395                 $rand = number_format( mt_rand() / mt_getrandmax(), 12, ".", "" );
 396                 $isminor = ( $isminor && $wgUser->getID() ) ? 1 : 0;
 397                 $sql = "INSERT INTO cur (cur_namespace,cur_title,cur_text," .
 398                   "cur_comment,cur_user,cur_timestamp,cur_minor_edit,cur_counter," .
 399                   "cur_restrictions,cur_user_text,cur_is_redirect," .
 400                   "cur_is_new,cur_random,cur_touched,inverse_timestamp) VALUES ({$ns},'" . wfStrencode( $ttl ) . "', '" .
 401                   wfStrencode( $text ) . "', '" .
 402                   wfStrencode( $summary ) . "', '" .
 403                   $wgUser->getID() . "', '{$now}', " .
 404                   $isminor . ", 0, '', '" .
 405                   wfStrencode( $wgUser->getName() ) . "', $redir, 1, $rand, '{$now}', '{$won}')";
 406                 $res = wfQuery( $sql, DB_WRITE, $fname );
 407
 408                 $newid = wfInsertId();
 409                 $this->mTitle->resetArticleID( $newid );
 410
 411                 Article::onArticleCreate( $this->mTitle );
 412                 RecentChange::notifyNew( $now, $this->mTitle, $isminor, $wgUser, $summary );
 413
 414                 if ($watchthis) {
 415                         if(!$this->mTitle->userIsWatching()) $this->watch();
 416                 } else {
 417                         if ( $this->mTitle->userIsWatching() ) {
 418                                 $this->unwatch();
 419                         }
 420                 }
 421
 422                 # The talk page isn't in the regular link tables, so we need to update manually:
 423                 $talkns = $ns ^ 1; # talk -> normal; normal -> talk
 424                 $sql = "UPDATE cur set cur_touched='$now' WHERE cur_namespace=$talkns AND cur_title='" . wfStrencode( $ttl ) . "'";
 425                 wfQuery( $sql, DB_WRITE );
 426
 427                 # standard deferred updates
 428                 $this->editUpdates( $text );
 429
 430                 # Squid purging
 431                 if ( $wgUseSquid ) {
 432                         $urlArr = Array(
 433                                 $wgInternalServer.$this->mTitle->getURL()
 434                         );
 435                         wfPurgeSquidServers($urlArr);
 436                         /* this needs to be done after LinksUpdate */
 437                         $u = new SquidUpdate($this->mTitle);
 438                         array_push( $wgDeferredUpdateList, $u );
 439                 }
 440
 441                 $this->showArticle( $text, wfMsg( "newarticle" ) );
 442         }
 443
 444         function updateArticle( $text, $summary, $minor, $watchthis, $section = "", $forceBot = false )
 445         {
 446                 global $wgOut, $wgUser, $wgLinkCache;
 447                 global $wgDBtransactions, $wgMwRedir;
 448                 global $wgUseSquid, $wgInternalServer;
 449                 $fname = "Article::updateArticle";
 450
 451                 $this->loadLastEdit();
 452
 453                 // insert updated section into old text if we have only edited part
 454                 // of the article
 455                 if ($section != "") {
 456                         $oldtext=$this->getContent();
 457                         if($section=="new") {
 458                                 if($summary) $subject="== {$summary} ==\n\n";
 459                                 $text=$oldtext."\n\n".$subject.$text;
 460                         } else {
 461                                 $secs=preg_split("/(^=+.*?=+|^<h[1-6].*?>.*?<\/h[1-6].*?>)/mi",
 462                                   $oldtext,-1,PREG_SPLIT_DELIM_CAPTURE);
 463                                 $secs[$section*2]=$text."\n\n"; // replace with edited
 464                                 if($section) { $secs[$section*2-1]=""; } // erase old headline
 465                                 $text=join("",$secs);
 466                         }
 467                 }
 468                 if ( $this->mMinorEdit ) { $me1 = 1; } else { $me1 = 0; }
 469                 if ( $minor && $wgUser->getID() ) { $me2 = 1; } else { $me2 = 0; }
 470                 if ( preg_match( "/^((" . $wgMwRedir->getBaseRegex() . ")[^\\n]+)/i", $text, $m ) ) {
 471                         $redir = 1;
 472                         $text = $m[1] . "\n"; # Remove all content but redirect
 473                 }
 474                 else { $redir = 0; }
 475
 476                 $text = $this->preSaveTransform( $text );
 477
 478                 # Update article, but only if changed.
 479
 480                 if( $wgDBtransactions ) {
 481                         $sql = "BEGIN";
 482                         wfQuery( $sql, DB_WRITE );
 483                 }
 484                 $oldtext = $this->getContent( true );
 485
 486                 if ( 0 != strcmp( $text, $oldtext ) ) {
 487                         $this->mCountAdjustment = $this->isCountable( $text )
 488                           - $this->isCountable( $oldtext );
 489
 490                         $now = wfTimestampNow();
 491                         $won = wfInvertTimestamp( $now );
 492                         $sql = "UPDATE cur SET cur_text='" . wfStrencode( $text ) .
 493                           "',cur_comment='" .  wfStrencode( $summary ) .
 494                           "',cur_minor_edit={$me2}, cur_user=" . $wgUser->getID() .
 495                           ",cur_timestamp='{$now}',cur_user_text='" .
 496                           wfStrencode( $wgUser->getName() ) .
 497                           "',cur_is_redirect={$redir}, cur_is_new=0, cur_touched='{$now}', inverse_timestamp='{$won}' " .
 498                           "WHERE cur_id=" . $this->getID() .
 499                           " AND cur_timestamp='" . $this->getTimestamp() . "'";
 500                         $res = wfQuery( $sql, DB_WRITE, $fname );
 501
 502                         if( wfAffectedRows() == 0 ) {
 503                                 /* Belated edit conflict! Run away!! */
 504                                 return false;
 505                         }
 506
 507                         # This overwrites $oldtext if revision compression is on
 508                         $flags = Article::compressRevisionText( $oldtext );
 509
 510                         $sql = "INSERT INTO old (old_namespace,old_title,old_text," .
 511                           "old_comment,old_user,old_user_text,old_timestamp," .
 512                           "old_minor_edit,inverse_timestamp,old_flags) VALUES (" .
 513                           $this->mTitle->getNamespace() . ", '" .
 514                           wfStrencode( $this->mTitle->getDBkey() ) . "', '" .
 515                           wfStrencode( $oldtext ) . "', '" .
 516                           wfStrencode( $this->getComment() ) . "', " .
 517                           $this->getUser() . ", '" .
 518                           wfStrencode( $this->getUserText() ) . "', '" .
 519                           $this->getTimestamp() . "', " . $me1 . ", '" .
 520                           wfInvertTimestamp( $this->getTimestamp() ) . "','$flags')";
 521                         $res = wfQuery( $sql, DB_WRITE, $fname );
 522                         $oldid = wfInsertID( $res );
 523
 524                         $bot = (int)($wgUser->isBot() || $forceBot);
 525                         RecentChange::notifyEdit( $now, $this->mTitle, $me2, $wgUser, $summary,
 526                                 $oldid, $this->getTimestamp(), $bot );
 527                         Article::onArticleEdit( $this->mTitle );
 528                 }
 529
 530                 if( $wgDBtransactions ) {
 531                         $sql = "COMMIT";
 532                         wfQuery( $sql, DB_WRITE );
 533                 }
 534
 535                 if ($watchthis) {
 536                         if (!$this->mTitle->userIsWatching()) $this->watch();
 537                 } else {
 538                         if ( $this->mTitle->userIsWatching() ) {
 539                                 $this->unwatch();
 540                         }
 541                 }
 542                 # standard deferred updates
 543                 $this->editUpdates( $text );
 544
 545                 # Squid updates
 546
 547                 if ( $wgUseSquid ) {
 548                         $urlArr = Array(
 549                                 $wgInternalServer.$this->mTitle->getURL()
 550                         );
 551                         wfPurgeSquidServers($urlArr);
 552                 }
 553
 554                 $this->showArticle( $text, wfMsg( "updated" ) );
 555                 return true;
 556         }
 557
 558         # After we've either updated or inserted the article, update
 559         # the link tables and redirect to the new page.
 560
 561         function showArticle( $text, $subtitle )
 562         {
 563                 global $wgOut, $wgUser, $wgLinkCache;
 564                 global $wgMwRedir;
 565
 566                 $wgLinkCache = new LinkCache();
 567
 568                 # Get old version of link table to allow incremental link updates
 569                 $wgLinkCache->preFill( $this->mTitle );
 570                 $wgLinkCache->clear();
 571
 572                 # Now update the link cache by parsing the text
 573                 $wgOut = new OutputPage();
 574                 $wgOut->addWikiText( $text );
 575
 576                 if( $wgMwRedir->matchStart( $text ) )
 577                         $r = "redirect=no";
 578                 else
 579                         $r = "";
 580                 $wgOut->redirect( $this->mTitle->getURL( $r ) );
 581         }
 582
 583         # Add this page to my watchlist
 584
 585         function watch( $add = true )
 586         {
 587                 global $wgUser, $wgOut, $wgLang;
 588                 global $wgDeferredUpdateList;
 589
 590                 if ( 0 == $wgUser->getID() ) {
 591                         $wgOut->errorpage( "watchnologin", "watchnologintext" );
 592                         return;
 593                 }
 594                 if ( wfReadOnly() ) {
 595                         $wgOut->readOnlyPage();
 596                         return;
 597                 }
 598                 if( $add )
 599                         $wgUser->addWatch( $this->mTitle );
 600                 else
 601                         $wgUser->removeWatch( $this->mTitle );
 602
 603                 $wgOut->setPagetitle( wfMsg( $add ? "addedwatch" : "removedwatch" ) );
 604                 $wgOut->setRobotpolicy( "noindex,follow" );
 605
 606                 $sk = $wgUser->getSkin() ;
 607                 $link = $sk->makeKnownLink ( $this->mTitle->getPrefixedText() ) ;
 608
 609                 if($add)
 610                         $text = wfMsg( "addedwatchtext", $link );
 611                 else
 612                         $text = wfMsg( "removedwatchtext", $link );
 613                 $wgOut->addHTML( $text );
 614
 615                 $up = new UserUpdate();
 616                 array_push( $wgDeferredUpdateList, $up );
 617
 618                 $wgOut->returnToMain( false );
 619         }
 620
 621         function unwatch()
 622         {
 623                 $this->watch( false );
 624         }
 625
 626         function protect( $limit = "sysop" )
 627         {
 628                 global $wgUser, $wgOut;
 629
 630                 if ( ! $wgUser->isSysop() ) {
 631                         $wgOut->sysopRequired();
 632                         return;
 633                 }
 634                 if ( wfReadOnly() ) {
 635                         $wgOut->readOnlyPage();
 636                         return;
 637                 }
 638                 $id = $this->mTitle->getArticleID();
 639                 if ( 0 == $id ) {
 640                         $wgOut->fatalEror( wfMsg( "badarticleerror" ) );
 641                         return;
 642                 }
 643         $sql = "UPDATE cur SET cur_touched='" . wfTimestampNow() . "'," .
 644                         "cur_restrictions='{$limit}' WHERE cur_id={$id}";
 645                 wfQuery( $sql, DB_WRITE, "Article::protect" );
 646
 647                 $log = new LogPage( wfMsg( "protectlogpage" ), wfMsg( "protectlogtext" ) );
 648                 if ( $limit === "" ) {
 649                         $log->addEntry( wfMsg( "unprotectedarticle", $this->mTitle->getPrefixedText() ), "" );
 650                 } else {
 651                         $log->addEntry( wfMsg( "protectedarticle", $this->mTitle->getPrefixedText() ), "" );
 652                 }
 653                 $wgOut->redirect( $this->mTitle->getURL() );
 654         }
 655
 656         function unprotect()
 657         {
 658                 return $this->protect( "" );
 659         }
 660
 661         function delete()
 662         {
 663                 global $wgUser, $wgOut, $wgMessageCache;
 664                 global $wpConfirm, $wpReason, $image, $oldimage;
 665
 666                 # This code desperately needs to be totally rewritten
 667
 668                 if ( ( ! $wgUser->isSysop() ) ) {
 669                         $wgOut->sysopRequired();
 670                         return;
 671                 }
 672                 if ( wfReadOnly() ) {
 673                         $wgOut->readOnlyPage();
 674                         return;
 675                 }
 676
 677                 # Can't delete cached MediaWiki namespace (i.e. vital messages)
 678                 if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI && $wgMessageCache->isCacheable( $this->mTitle->getDBkey() ) ) {
 679                         $wgOut->fatalError( wfMsg( "cannotdelete" ) );
 680                         return;
 681                 }
 682
 683                 # Better double-check that it hasn't been deleted yet!
 684                 $wgOut->setPagetitle( wfMsg( "confirmdelete" ) );
 685                 if ( ( "" == trim( $this->mTitle->getText() ) )
 686                   or ( $this->mTitle->getArticleId() == 0 ) ) {
 687                         $wgOut->fatalError( wfMsg( "cannotdelete" ) );
 688                         return;
 689                 }
 690
 691                 if ( $_POST["wpConfirm"] ) {
 692                         $this->doDelete();
 693                         return;
 694                 }
 695
 696                 # determine whether this page has earlier revisions
 697                 # and insert a warning if it does
 698                 # we select the text because it might be useful below
 699                 $ns = $this->mTitle->getNamespace();
 700                 $title = $this->mTitle->getDBkey();
 701                 $etitle = wfStrencode( $title );
 702                 $sql = "SELECT old_text,old_flags FROM old WHERE old_namespace=$ns and old_title='$etitle' ORDER BY inverse_timestamp LIMIT 1";
 703                 $res = wfQuery( $sql, DB_READ, $fname );
 704                 if( ($old=wfFetchObject($res)) && !$wpConfirm ) {
 705                         $skin=$wgUser->getSkin();
 706                         $wgOut->addHTML("<B>".wfMsg("historywarning"));
 707                         $wgOut->addHTML( $skin->historyLink() ."</B><P>");
 708                 }
 709
 710                 $sql="SELECT cur_text FROM cur WHERE cur_namespace=$ns and cur_title='$etitle'";
 711                 $res=wfQuery($sql, DB_READ, $fname);
 712                 if( ($s=wfFetchObject($res))) {
 713
 714                         # if this is a mini-text, we can paste part of it into the deletion reason
 715
 716                         #if this is empty, an earlier revision may contain "useful" text
 717                         if($s->cur_text!="") {
 718                                 $text=$s->cur_text;
 719                         } else {
 720                                 if($old) {
 721                                         $text = Article::getRevisionText( $old );
 722                                         $blanked=1;
 723                                 }
 724
 725                         }
 726
 727                         $length=strlen($text);
 728
 729                         # this should not happen, since it is not possible to store an empty, new
 730                         # page. Let's insert a standard text in case it does, though
 731                         if($length==0 && !$wpReason) { $wpReason=wfmsg("exblank");}
 732
 733
 734                         if($length < 500 && !$wpReason) {
 735
 736                                 # comment field=255, let's grep the first 150 to have some user
 737                                 # space left
 738                                 $text=substr($text,0,150);
 739                                 # let's strip out newlines and HTML tags
 740                                 $text=preg_replace("/\"/","'",$text);
 741                                 $text=preg_replace("/\</","&lt;",$text);
 742                                 $text=preg_replace("/\>/","&gt;",$text);
 743                                 $text=preg_replace("/[\n\r]/","",$text);
 744                                 if(!$blanked) {
 745                                         $wpReason=wfMsg("excontent"). " '".$text;
 746                                 } else {
 747                                         $wpReason=wfMsg("exbeforeblank") . " '".$text;
 748                                 }
 749                                 if($length>150) { $wpReason .= "..."; } # we've only pasted part of the text
 750                                 $wpReason.="'";
 751                         }
 752                 }
 753
 754                 return $this->confirmDelete();
 755         }
 756
 757         function confirmDelete( $par = "" )
 758         {
 759                 global $wgOut;
 760                 global $wpReason;
 761
 762                 wfDebug( "Article::confirmDelete\n" );
 763
 764                 $sub = htmlspecialchars( $this->mTitle->getPrefixedText() );
 765                 $wgOut->setSubtitle( wfMsg( "deletesub", $sub ) );
 766                 $wgOut->setRobotpolicy( "noindex,nofollow" );
 767                 $wgOut->addWikiText( wfMsg( "confirmdeletetext" ) );
 768
 769                 $formaction = $this->mTitle->getURL( $this->mTitle, "action=delete" . $par, true );
 770
 771                 $confirm = wfMsg( "confirm" );
 772                 $check = wfMsg( "confirmcheck" );
 773                 $delcom = wfMsg( "deletecomment" );
 774
 775                 $wgOut->addHTML( "
 776 <form id=\"deleteconfirm\" method=\"post\" action=\"{$formaction}\">
 777 <table border=0><tr><td align=right>
 778 {$delcom}:</td><td align=left>
 779 <input type=text size=60 name=\"wpReason\" value=\"" . htmlspecialchars( $wpReason ) . "\">
 780 </td></tr><tr><td>&nbsp;</td></tr>
 781 <tr><td align=right>
 782 <input type=checkbox name=\"wpConfirm\" value='1' id=\"wpConfirm\">
 783 </td><td><label for=\"wpConfirm\">{$check}</label></td>
 784 </tr><tr><td>&nbsp;</td><td>
 785 <input type=submit name=\"wpConfirmB\" value=\"{$confirm}\">
 786 </td></tr></table></form>\n" );
 787
 788                 $wgOut->returnToMain( false );
 789         }
 790
 791         function doDelete()
 792         {
 793                 global $wgOut, $wgUser, $wgLang;
 794                 global $wpReason;
 795                 $fname = "Article::doDelete";
 796                 wfDebug( "$fname\n" );
 797
 798                 $this->doDeleteArticle( $this->mTitle );
 799                 $deleted = $this->mTitle->getPrefixedText();
 800
 801                 $wgOut->setPagetitle( wfMsg( "actioncomplete" ) );
 802                 $wgOut->setRobotpolicy( "noindex,nofollow" );
 803
 804                 $sk = $wgUser->getSkin();
 805                 $loglink = $sk->makeKnownLink( $wgLang->getNsText(
 806                   Namespace::getWikipedia() ) .
 807                   ":" . wfMsg( "dellogpage" ), wfMsg( "deletionlog" ) );
 808
 809                 $text = wfMsg( "deletedtext", $deleted, $loglink );
 810
 811                 $wgOut->addHTML( "<p>" . $text );
 812                 $wgOut->returnToMain( false );
 813         }
 814
 815         function doDeleteArticle( $title )
 816         {
 817                 global $wgUser, $wgOut, $wgLang, $wpReason;
 818                 global  $wgUseSquid, $wgDeferredUpdateList, $wgInternalServer;
 819
 820                 $fname = "Article::doDeleteArticle";
 821                 wfDebug( "$fname\n" );
 822
 823                 $ns = $title->getNamespace();
 824                 $t = wfStrencode( $title->getDBkey() );
 825                 $id = $title->getArticleID();
 826
 827                 if ( "" == $t ) {
 828                         $wgOut->fatalError( wfMsg( "cannotdelete" ) );
 829                         return;
 830                 }
 831
 832                 $u = new SiteStatsUpdate( 0, 1, -$this->isCountable( $this->getContent( true ) ) );
 833                 array_push( $wgDeferredUpdateList, $u );
 834
 835                 # Squid purging
 836                 if ( $wgUseSquid ) {
 837                         $urlArr = Array(
 838                                 $wgInternalServer.$this->mTitle->getURL()
 839                         );
 840                         wfPurgeSquidServers($urlArr);
 841
 842                         /* prepare the list of urls to purge */
 843                         $sql = "SELECT l_from FROM links WHERE l_to={$id}" ;
 844                         $res = wfQuery ( $sql, DB_READ ) ;
 845                         while ( $BL = wfFetchObject ( $res ) )
 846                         {
 847                                 $tobj = Title::newFromDBkey( $BL->l_from) ;
 848                                 $blurlArr[] = $wgInternalServer.$tobj->getURL();
 849                         }
 850                         wfFreeResult ( $res ) ;
 851                         $u = new SquidUpdate( $this->mTitle, $blurlArr );
 852                         array_push( $wgDeferredUpdateList, $u );
 853
 854                 }
 855
 856
 857
 858                 # Move article and history to the "archive" table
 859                 $sql = "INSERT INTO archive (ar_namespace,ar_title,ar_text," .
 860                   "ar_comment,ar_user,ar_user_text,ar_timestamp,ar_minor_edit," .
 861                   "ar_flags) SELECT cur_namespace,cur_title,cur_text,cur_comment," .
 862                   "cur_user,cur_user_text,cur_timestamp,cur_minor_edit,0 FROM cur " .
 863                   "WHERE cur_namespace={$ns} AND cur_title='{$t}'";
 864                 wfQuery( $sql, DB_WRITE, $fname );
 865
 866                 $sql = "INSERT INTO archive (ar_namespace,ar_title,ar_text," .
 867                   "ar_comment,ar_user,ar_user_text,ar_timestamp,ar_minor_edit," .
 868                   "ar_flags) SELECT old_namespace,old_title,old_text,old_comment," .
 869                   "old_user,old_user_text,old_timestamp,old_minor_edit,old_flags " .
 870                   "FROM old WHERE old_namespace={$ns} AND old_title='{$t}'";
 871                 wfQuery( $sql, DB_WRITE, $fname );
 872
 873                 # Now that it's safely backed up, delete it
 874
 875                 $sql = "DELETE FROM cur WHERE cur_namespace={$ns} AND " .
 876                   "cur_title='{$t}'";
 877                 wfQuery( $sql, DB_WRITE, $fname );
 878
 879                 $sql = "DELETE FROM old WHERE old_namespace={$ns} AND " .
 880                   "old_title='{$t}'";
 881                 wfQuery( $sql, DB_WRITE, $fname );
 882
 883                 $sql = "DELETE FROM recentchanges WHERE rc_namespace={$ns} AND " .
 884                   "rc_title='{$t}'";
 885                 wfQuery( $sql, DB_WRITE, $fname );
 886
 887                 # Finally, clean up the link tables
 888
 889                 if ( 0 != $id ) {
 890
 891                         $t = wfStrencode( $title->getPrefixedDBkey() );
 892
 893                         Article::onArticleDelete( $title );
 894
 895                         $sql = "SELECT l_from FROM links WHERE l_to={$id}";
 896                         $res = wfQuery( $sql, DB_READ, $fname );
 897
 898                         $sql = "INSERT INTO brokenlinks (bl_from,bl_to) VALUES ";
 899                         $now = wfTimestampNow();
 900                         $sql2 = "UPDATE cur SET cur_touched='{$now}' WHERE cur_id IN (";
 901                         $first = true;
 902
 903                         while ( $s = wfFetchObject( $res ) ) {
 904                                 $nt = Title::newFromDBkey( $s->l_from );
 905                                 $lid = $nt->getArticleID();
 906
 907                                 if ( ! $first ) { $sql .= ","; $sql2 .= ","; }
 908                                 $first = false;
 909                                 $sql .= "({$lid},'{$t}')";
 910                                 $sql2 .= "{$lid}";
 911                         }
 912                         $sql2 .= ")";
 913                         if ( ! $first ) {
 914                                 wfQuery( $sql, DB_WRITE, $fname );
 915                                 wfQuery( $sql2, DB_WRITE, $fname );
 916                         }
 917                         wfFreeResult( $res );
 918
 919                         $sql = "DELETE FROM links WHERE l_to={$id}";
 920                         wfQuery( $sql, DB_WRITE, $fname );
 921
 922                         $sql = "DELETE FROM links WHERE l_from='{$t}'";
 923                         wfQuery( $sql, DB_WRITE, $fname );
 924
 925                         $sql = "DELETE FROM imagelinks WHERE il_from='{$t}'";
 926                         wfQuery( $sql, DB_WRITE, $fname );
 927
 928                         $sql = "DELETE FROM brokenlinks WHERE bl_from={$id}";
 929                         wfQuery( $sql, DB_WRITE, $fname );
 930                 }
 931
 932                 $log = new LogPage( wfMsg( "dellogpage" ), wfMsg( "dellogpagetext" ) );
 933                 $art = $title->getPrefixedText();
 934                 $wpReason = wfCleanQueryVar( $wpReason );
 935                 $log->addEntry( wfMsg( "deletedarticle", $art ), $wpReason );
 936
 937                 # Clear the cached article id so the interface doesn't act like we exist
 938                 $this->mTitle->resetArticleID( 0 );
 939                 $this->mTitle->mArticleID = 0;
 940         }
 941
 942         function rollback()
 943         {
 944                 global $wgUser, $wgLang, $wgOut, $from;
 945
 946                 if ( ! $wgUser->isSysop() ) {
 947                         $wgOut->sysopRequired();
 948                         return;
 949                 }
 950                 if ( wfReadOnly() ) {
 951                         $wgOut->readOnlyPage( $this->getContent() );
 952                         return;
 953                 }
 954
 955                 # Enhanced rollback, marks edits rc_bot=1
 956                 $bot = !!$_REQUEST['bot'];
 957
 958                 # Replace all this user's current edits with the next one down
 959                 $tt = wfStrencode( $this->mTitle->getDBKey() );
 960                 $n = $this->mTitle->getNamespace();
 961
 962                 # Get the last editor
 963                 $sql = "SELECT cur_id,cur_user,cur_user_text,cur_comment FROM cur WHERE cur_title='{$tt}' AND cur_namespace={$n}";
 964                 $res = wfQuery( $sql, DB_READ );
 965                 if( ($x = wfNumRows( $res )) != 1 ) {
 966                         # Something wrong
 967                         $wgOut->addHTML( wfMsg( "notanarticle" ) );
 968                         return;
 969                 }
 970                 $s = wfFetchObject( $res );
 971                 $ut = wfStrencode( $s->cur_user_text );
 972                 $uid = $s->cur_user;
 973                 $pid = $s->cur_id;
 974
 975                 $from = str_replace( '_', ' ', wfCleanQueryVar( $from ) );
 976                 if( $from != $s->cur_user_text ) {
 977                         $wgOut->setPageTitle(wfmsg("rollbackfailed"));
 978                         $wgOut->addWikiText( wfMsg( "alreadyrolled",
 979                                 htmlspecialchars( $this->mTitle->getPrefixedText()),
 980                                 htmlspecialchars( $from ),
 981                                 htmlspecialchars( $s->cur_user_text ) ) );
 982                         if($s->cur_comment != "") {
 983                                 $wgOut->addHTML(
 984                                         wfMsg("editcomment",
 985                                         htmlspecialchars( $s->cur_comment ) ) );
 986                         }
 987                         return;
 988                 }
 989
 990                 # Get the last edit not by this guy
 991                 $sql = "SELECT old_text,old_user,old_user_text,old_timestamp,old_flags
 992                 FROM old USE INDEX (name_title_timestamp)
 993                 WHERE old_namespace={$n} AND old_title='{$tt}'
 994                 AND (old_user <> {$uid} OR old_user_text <> '{$ut}')
 995                 ORDER BY inverse_timestamp LIMIT 1";
 996                 $res = wfQuery( $sql, DB_READ );
 997                 if( wfNumRows( $res ) != 1 ) {
 998                         # Something wrong
 999                         $wgOut->setPageTitle(wfMsg("rollbackfailed"));
1000                         $wgOut->addHTML( wfMsg( "cantrollback" ) );
1001                         return;
1002                 }
1003                 $s = wfFetchObject( $res );
1004
1005                 if ( $bot ) {
1006                         # Mark all reverted edits as bot
1007                         $sql = "UPDATE recentchanges SET rc_bot=1 WHERE
1008                                 rc_cur_id=$pid AND rc_user=$uid AND rc_timestamp > '{$s->old_timestamp}'";
1009                         wfQuery( $sql, DB_WRITE, $fname );
1010                 }
1011
1012                 # Save it!
1013                 $newcomment = wfMsg( "revertpage", $s->old_user_text, $from );
1014                 $wgOut->setPagetitle( wfMsg( "actioncomplete" ) );
1015                 $wgOut->setRobotpolicy( "noindex,nofollow" );
1016                 $wgOut->addHTML( "<h2>" . $newcomment . "</h2>\n<hr>\n" );
1017                 $this->updateArticle( Article::getRevisionText( $s ), $newcomment, 1, $this->mTitle->userIsWatching(), "", $bot );
1018
1019                 Article::onArticleEdit( $this->mTitle );
1020                 $wgOut->returnToMain( false );
1021         }
1022
1023
1024         # Do standard deferred updates after page view
1025
1026         /* private */ function viewUpdates()
1027         {
1028                 global $wgDeferredUpdateList;
1029                 if ( 0 != $this->getID() ) {
1030                         global $wgDisableCounters;
1031                         if( !$wgDisableCounters ) {
1032                                 Article::incViewCount( $this->getID() );
1033                                 $u = new SiteStatsUpdate( 1, 0, 0 );
1034                                 array_push( $wgDeferredUpdateList, $u );
1035                         }
1036                         $u = new UserTalkUpdate( 0, $this->mTitle->getNamespace(),
1037                           $this->mTitle->getDBkey() );
1038                         array_push( $wgDeferredUpdateList, $u );
1039                 }
1040         }
1041
1042         # Do standard deferred updates after page edit.
1043         # Every 1000th edit, prune the recent changes table.
1044
1045         /* private */ function editUpdates( $text )
1046         {
1047                 global $wgDeferredUpdateList, $wgDBname, $wgMemc;
1048                 global $wgMessageCache;
1049
1050                 wfSeedRandom();
1051                 if ( 0 == mt_rand( 0, 999 ) ) {
1052                         $cutoff = wfUnix2Timestamp( time() - ( 7 * 86400 ) );
1053                         $sql = "DELETE FROM recentchanges WHERE rc_timestamp < '{$cutoff}'";
1054                         wfQuery( $sql, DB_WRITE );
1055                 }
1056                 $id = $this->getID();
1057                 $title = $this->mTitle->getPrefixedDBkey();
1058                 $shortTitle = $this->mTitle->getDBkey();
1059
1060                 $adj = $this->mCountAdjustment;
1061
1062                 if ( 0 != $id ) {
1063                         $u = new LinksUpdate( $id, $title );
1064                         array_push( $wgDeferredUpdateList, $u );
1065                         $u = new SiteStatsUpdate( 0, 1, $adj );
1066                         array_push( $wgDeferredUpdateList, $u );
1067                         $u = new SearchUpdate( $id, $title, $text );
1068                         array_push( $wgDeferredUpdateList, $u );
1069
1070                         $u = new UserTalkUpdate( 1, $this->mTitle->getNamespace(), $shortTitle );
1071                         array_push( $wgDeferredUpdateList, $u );
1072
1073                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
1074                                 $wgMessageCache->replace( $shortTitle, $text );
1075                         }
1076                 }
1077         }
1078
1079         /* private */ function setOldSubtitle()
1080         {
1081                 global $wgLang, $wgOut;
1082
1083                 $td = $wgLang->timeanddate( $this->mTimestamp, true );
1084                 $r = wfMsg( "revisionasof", $td );
1085                 $wgOut->setSubtitle( "({$r})" );
1086         }
1087
1088         # This function is called right before saving the wikitext,
1089         # so we can do things like signatures and links-in-context.
1090
1091         function preSaveTransform( $text )
1092         {
1093                 global $wgParser, $wgUser;
1094                 return $wgParser->preSaveTransform( $text, $this->mTitle, $wgUser, ParserOptions::newFromUser( $wgUser ) );
1095         }
1096
1097         /* Caching functions */
1098
1099         # checkLastModified returns true iff it has taken care of all
1100         # output to the client that is necessary for this request.
1101         # (that is, it has sent a cached version of the page)
1102         function tryFileCache() {
1103                 static $called = false;
1104                 if( $called ) {
1105                         wfDebug( " tryFileCache() -- called twice!?\n" );
1106                         return;
1107                 }
1108                 $called = true;
1109                 if($this->isFileCacheable()) {
1110                         $touched = $this->mTouched;
1111                         if( $this->mTitle->getPrefixedDBkey() == wfMsg( "mainpage" ) ) {
1112                                 # Expire the main page quicker
1113                                 $expire = wfUnix2Timestamp( time() - 3600 );
1114                                 $touched = max( $expire, $touched );
1115                         }
1116                         $cache = new CacheManager( $this->mTitle );
1117                         if($cache->isFileCacheGood( $touched )) {
1118                                 global $wgOut;
1119                                 wfDebug( " tryFileCache() - about to load\n" );
1120                                 $cache->loadFromFileCache();
1121                                 return true;
1122                         } else {
1123                                 wfDebug( " tryFileCache() - starting buffer\n" );
1124                                 ob_start( array(&$cache, 'saveToFileCache' ) );
1125                         }
1126                 } else {
1127                         wfDebug( " tryFileCache() - not cacheable\n" );
1128                 }
1129         }
1130
1131         function isFileCacheable() {
1132                 global $wgUser, $wgUseFileCache, $wgShowIPinHeader;
1133                 global $action, $oldid, $diff, $redirect, $printable;
1134                 return $wgUseFileCache
1135                         and (!$wgShowIPinHeader)
1136                         and ($this->getID() != 0)
1137                         and ($wgUser->getId() == 0)
1138                         and (!$wgUser->getNewtalk())
1139                         and ($this->mTitle->getNamespace() != Namespace::getSpecial())
1140                         and ($action == "view")
1141                         and (!isset($oldid))
1142                         and (!isset($diff))
1143                         and (!isset($redirect))
1144                         and (!isset($printable))
1145                         and (!$this->mRedirectedFrom);
1146         }
1147
1148         function checkTouched() {
1149                 $id = $this->getID();
1150                 $sql = "SELECT cur_touched,cur_is_redirect FROM cur WHERE cur_id=$id";
1151                 $res = wfQuery( $sql, DB_READ, "Article::checkTouched" );
1152                 if( $s = wfFetchObject( $res ) ) {
1153                         $this->mTouched = $s->cur_touched;
1154                         return !$s->cur_is_redirect;
1155                 } else {
1156                         return false;
1157                 }
1158         }
1159
1160         /* static */ function incViewCount( $id )
1161         {
1162                 $id = intval( $id );
1163                 global $wgHitcounterUpdateFreq;
1164
1165                 if( $wgHitcounterUpdateFreq <= 1 ){ //
1166                         wfQuery("UPDATE cur SET cur_counter = cur_counter + 1 " .
1167                                 "WHERE cur_id = $id", DB_WRITE);
1168                         return;
1169                 }
1170
1171                 # Not important enough to warrant an error page in case of failure
1172                 $oldignore = wfIgnoreSQLErrors( true );
1173
1174                 wfQuery("INSERT INTO hitcounter (hc_id) VALUES ({$id})", DB_WRITE);
1175
1176                 $checkfreq = intval( $wgHitcounterUpdateFreq/25 + 1 );
1177                 if( (rand() % $checkfreq != 0) or (wfLastErrno() != 0) ){
1178                         # Most of the time (or on SQL errors), skip row count check
1179                         wfIgnoreSQLErrors( $oldignore );
1180                         return;
1181                 }
1182
1183                 $res = wfQuery("SELECT COUNT(*) as n FROM hitcounter", DB_WRITE);
1184                 $row = wfFetchObject( $res );
1185                 $rown = intval( $row->n );
1186                 if( $rown >= $wgHitcounterUpdateFreq ){
1187                         wfProfileIn( "Article::incViewCount-collect" );
1188                         $old_user_abort = ignore_user_abort( true );
1189
1190                         wfQuery("LOCK TABLES hitcounter WRITE", DB_WRITE);
1191                         wfQuery("CREATE TEMPORARY TABLE acchits TYPE=HEAP ".
1192                                 "SELECT hc_id,COUNT(*) AS hc_n FROM hitcounter ".
1193                                 "GROUP BY hc_id", DB_WRITE);
1194                         wfQuery("DELETE FROM hitcounter", DB_WRITE);
1195                         wfQuery("UNLOCK TABLES", DB_WRITE);
1196                         wfQuery("UPDATE cur,acchits SET cur_counter=cur_counter + hc_n ".
1197                                 "WHERE cur_id = hc_id", DB_WRITE);
1198                         wfQuery("DROP TABLE acchits", DB_WRITE);
1199
1200                         ignore_user_abort( $old_user_abort );
1201                         wfProfileOut( "Article::incViewCount-collect" );
1202                 }
1203                 wfIgnoreSQLErrors( $oldignore );
1204         }
1205
1206         # The onArticle*() functions are supposed to be a kind of hooks
1207         # which should be called whenever any of the specified actions
1208         # are done.
1209         #
1210         # This is a good place to put code to clear caches, for instance.
1211
1212         /* static */ function onArticleCreate($title_obj){
1213                 global $wgEnablePersistentLC, $wgEnableParserCache;
1214                 if ( $wgEnablePersistentLC ) {
1215                         LinkCache::linksccClearBrokenLinksTo( $title_obj->getPrefixedDBkey() );
1216                 }
1217                 if ( $wgEnableParserCache ) {
1218                         OutputPage::parsercacheClearBrokenLinksTo( $title_obj->getPrefixedDBkey() );
1219                 }
1220         }
1221
1222         /* static */ function onArticleDelete($title_obj){
1223                 global $wgEnablePersistentLC, $wgEnableParserCache;
1224                 if ( $wgEnablePersistentLC ) {
1225                         LinkCache::linksccClearLinksTo( $title_obj->getArticleID() );
1226                 }
1227                 if ( $wgEnableParserCache ) {
1228                         OutputPage::parsercacheClearLinksTo( $title_obj->getArticleID() );
1229                 }
1230         }
1231
1232         /* static */ function onArticleEdit($title_obj){
1233                 global $wgEnablePersistentLC, $wgEnableParserCache;
1234                 if ( $wgEnablePersistentLC ) {
1235                         LinkCache::linksccClearPage( $title_obj->getArticleID() );
1236                 }
1237                 if ( $wgEnableParserCache ) {
1238                         OutputPage::parsercacheClearPage( $title_obj->getArticleID(), $title_obj->getNamespace() );
1239                 }
1240         }
1241 }
1242
1243 function wfReplaceSubstVar( $matches ) {
1244         return wfMsg( $matches[1] );
1245 }
1246
1247 ?>