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
 125                 # Pre-fill content with error message so that if something
 126                 # fails we'll have something telling us what we intended.
 127
 128                 $t = $this->mTitle->getPrefixedText();
 129                 if ( isset( $oldid ) ) {
 130                         $oldid = IntVal( $oldid );
 131                         $t .= ",oldid={$oldid}";
 132                 }
 133                 if ( isset( $redirect ) ) {
 134                         $redirect = ($redirect == "no") ? "no" : "yes";
 135                         $t .= ",redirect={$redirect}";
 136                 }
 137                 $this->mContent = wfMsg( "missingarticle", $t );
 138
 139                 if ( ! $oldid ) {       # Retrieve current version
 140                         $id = $this->getID();
 141                         if ( 0 == $id ) return;
 142
 143                         $sql = "SELECT " .
 144                           "cur_text,cur_timestamp,cur_user,cur_counter,cur_restrictions,cur_touched " .
 145                           "FROM cur WHERE cur_id={$id}";
 146                         wfDebug( "$sql\n" );
 147                         $res = wfQuery( $sql, DB_READ, $fname );
 148                         if ( 0 == wfNumRows( $res ) ) {
 149                                 return;
 150                         }
 151
 152                         $s = wfFetchObject( $res );
 153                         # If we got a redirect, follow it (unless we've been told
 154                         # not to by either the function parameter or the query
 155                         if ( ( "no" != $redirect ) && ( false == $noredir ) &&
 156                           ( $wgMwRedir->matchStart( $s->cur_text ) ) ) {
 157                                 if ( preg_match( "/\\[\\[([^\\]\\|]+)[\\]\\|]/",
 158                                   $s->cur_text, $m ) ) {
 159                                         $rt = Title::newFromText( $m[1] );
 160                                         if( $rt ) {
 161                                                 # Gotta hand redirects to special pages differently:
 162                                                 # Fill the HTTP response "Location" header and ignore
 163                                                 # the rest of the page we're on.
 164
 165                                                 if ( $rt->getInterwiki() != "" ) {
 166                                                         $wgOut->redirect( $rt->getFullURL() ) ;
 167                                                         return;
 168                                                 }
 169                                                 if ( $rt->getNamespace() == Namespace::getSpecial() ) {
 170                                                         $wgOut->redirect( $rt->getFullURL() );
 171                                                         return;
 172                                                 }
 173                                                 $rid = $rt->getArticleID();
 174                                                 if ( 0 != $rid ) {
 175                                                         $sql = "SELECT cur_text,cur_timestamp,cur_user," .
 176                                                           "cur_counter,cur_restrictions,cur_touched FROM cur WHERE cur_id={$rid}";
 177                                                         $res = wfQuery( $sql, DB_READ, $fname );
 178
 179                                                         if ( 0 != wfNumRows( $res ) ) {
 180                                                                 $this->mRedirectedFrom = $this->mTitle->getPrefixedText();
 181                                                                 $this->mTitle = $rt;
 182                                                                 $s = wfFetchObject( $res );
 183                                                         }
 184                                                 }
 185                                         }
 186                                 }
 187                         }
 188
 189                         $this->mContent = $s->cur_text;
 190                         $this->mUser = $s->cur_user;
 191                         $this->mCounter = $s->cur_counter;
 192                         $this->mTimestamp = $s->cur_timestamp;
 193                         $this->mTouched = $s->cur_touched;
 194                         $this->mTitle->mRestrictions = explode( ",", trim( $s->cur_restrictions ) );
 195                         $this->mTitle->mRestrictionsLoaded = true;
 196                         wfFreeResult( $res );
 197                 } else { # oldid set, retrieve historical version
 198                         $sql = "SELECT old_text,old_timestamp,old_user,old_flags FROM old " .
 199                           "WHERE old_id={$oldid}";
 200                         $res = wfQuery( $sql, DB_READ, $fname );
 201                         if ( 0 == wfNumRows( $res ) ) { return; }
 202
 203                         $s = wfFetchObject( $res );
 204                         $this->mContent = Article::getRevisionText( $s );
 205                         $this->mUser = $s->old_user;
 206                         $this->mCounter = 0;
 207                         $this->mTimestamp = $s->old_timestamp;
 208                         wfFreeResult( $res );
 209                 }
 210                 $this->mContentLoaded = true;
 211         }
 212
 213         function getID() {
 214                 if( $this->mTitle ) {
 215                         return $this->mTitle->getArticleID();
 216                 } else {
 217                         return 0;
 218                 }
 219         }
 220
 221         function getCount()
 222         {
 223                 if ( -1 == $this->mCounter ) {
 224                         $id = $this->getID();
 225                         $this->mCounter = wfGetSQL( "cur", "cur_counter", "cur_id={$id}" );
 226                 }
 227                 return $this->mCounter;
 228         }
 229
 230         # Would the given text make this article a "good" article (i.e.,
 231         # suitable for including in the article count)?
 232
 233         function isCountable( $text )
 234         {
 235                 global $wgUseCommaCount, $wgMwRedir;
 236
 237                 if ( 0 != $this->mTitle->getNamespace() ) { return 0; }
 238                 if ( $wgMwRedir->matchStart( $text ) ) { return 0; }
 239                 $token = ($wgUseCommaCount ? "," : "[[" );
 240                 if ( false === strstr( $text, $token ) ) { return 0; }
 241                 return 1;
 242         }
 243
 244         # Loads everything from cur except cur_text
 245         # This isn't necessary for all uses, so it's only done if needed.
 246
 247         /* private */ function loadLastEdit()
 248         {
 249                 global $wgOut;
 250                 if ( -1 != $this->mUser ) return;
 251
 252                 $sql = "SELECT cur_user,cur_user_text,cur_timestamp," .
 253                   "cur_comment,cur_minor_edit FROM cur WHERE " .
 254                   "cur_id=" . $this->getID();
 255                 $res = wfQuery( $sql, DB_READ, "Article::loadLastEdit" );
 256
 257                 if ( wfNumRows( $res ) > 0 ) {
 258                         $s = wfFetchObject( $res );
 259                         $this->mUser = $s->cur_user;
 260                         $this->mUserText = $s->cur_user_text;
 261                         $this->mTimestamp = $s->cur_timestamp;
 262                         $this->mComment = $s->cur_comment;
 263                         $this->mMinorEdit = $s->cur_minor_edit;
 264                 }
 265         }
 266
 267         function getTimestamp()
 268         {
 269                 $this->loadLastEdit();
 270                 return $this->mTimestamp;
 271         }
 272
 273         function getUser()
 274         {
 275                 $this->loadLastEdit();
 276                 return $this->mUser;
 277         }
 278
 279         function getUserText()
 280         {
 281                 $this->loadLastEdit();
 282                 return $this->mUserText;
 283         }
 284
 285         function getComment()
 286         {
 287                 $this->loadLastEdit();
 288                 return $this->mComment;
 289         }
 290
 291         function getMinorEdit()
 292         {
 293                 $this->loadLastEdit();
 294                 return $this->mMinorEdit;
 295         }
 296
 297         # This is the default action of the script: just view the page of
 298         # the given title.
 299
 300         function view()
 301         {
 302                 global $wgUser, $wgOut, $wgLang;
 303                 global $oldid, $diff, $printable; # From query
 304                 global $wgLinkCache, $IP, $wgEnableParserCache;
 305
 306                 $fname = "Article::view";
 307                 wfProfileIn( $fname );
 308
 309                 $wgOut->setArticleFlag( true );
 310                 $wgOut->setRobotpolicy( "index,follow" );
 311
 312                 # If we got diff and oldid in the query, we want to see a
 313                 # diff page instead of the article.
 314
 315                 if ( isset( $diff ) ) {
 316                         $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
 317                         $de = new DifferenceEngine( $oldid, $diff );
 318                         $de->showDiffPage();
 319                         wfProfileOut( $fname );
 320                         return;
 321                 }
 322
 323                 if ( !isset( $oldid ) and $this->checkTouched() ) {
 324                         if( $wgOut->checkLastModified( $this->mTouched ) ){
 325                                 return;
 326                         } else if ( $this->tryFileCache() ) {
 327                                 # tell wgOut that output is taken care of
 328                                 $wgOut->disable();
 329                                 $this->viewUpdates();
 330                                 return;
 331                         }
 332                 }
 333
 334                 $text = $this->getContent(); # May change mTitle
 335                 $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
 336                 $wgOut->setHTMLTitle( $this->mTitle->getPrefixedText() .
 337                   " - " . wfMsg( "wikititlesuffix" ) );
 338
 339                 # We're looking at an old revision
 340
 341                 if ( $oldid ) {
 342                         $this->setOldSubtitle();
 343                         $wgOut->setRobotpolicy( "noindex,follow" );
 344                 }
 345                 if ( "" != $this->mRedirectedFrom ) {
 346                         $sk = $wgUser->getSkin();
 347                         $redir = $sk->makeKnownLink( $this->mRedirectedFrom, "",
 348                           "redirect=no" );
 349                         $s = wfMsg( "redirectedfrom", $redir );
 350                         $wgOut->setSubtitle( $s );
 351                 }
 352
 353                 $wgLinkCache->preFill( $this->mTitle );
 354
 355                 if ( $printable == "yes" ) {
 356                         $wgOut->mParserOptions->setPrintable( true );
 357                 }
 358
 359                 if( $wgEnableParserCache && intval($wgUser->getOption( "stubthreshold" )) == 0 ){
 360                         $wgOut->addWikiText( $text, true, $this );
 361                 } else {
 362                         $wgOut->addWikiText( $text );
 363                 }
 364
 365                 # Add link titles as META keywords
 366                 $wgOut->addMetaTags() ;
 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                 $this->showArticle( $text, wfMsg( "newarticle" ) );
 431         }
 432
 433
 434         /* Side effects: loads last edit */
 435         function getTextOfLastEditWithSectionReplacedOrAdded($section, $text, $summary = ""){
 436                 $this->loadLastEdit();
 437                 $oldtext = $this->getContent();
 438                 if ($section != "") {
 439                         if($section=="new") {
 440                                 if($summary) $subject="== {$summary} ==\n\n";
 441                                 $text=$oldtext."\n\n".$subject.$text;
 442                         } else {
 443                                 $secs=preg_split("/(^=+.*?=+|^<h[1-6].*?>.*?<\/h[1-6].*?>)/mi",
 444                                   $oldtext,-1,PREG_SPLIT_DELIM_CAPTURE);
 445                                 $secs[$section*2]=$text."\n\n"; // replace with edited
 446                                 if($section) { $secs[$section*2-1]=""; } // erase old headline
 447                                 $text=join("",$secs);
 448                         }
 449                 }
 450                 return $text;
 451         }
 452
 453         function updateArticle( $text, $summary, $minor, $watchthis, $forceBot = false )
 454         {
 455                 global $wgOut, $wgUser, $wgLinkCache;
 456                 global $wgDBtransactions, $wgMwRedir;
 457                 global $wgUseSquid, $wgInternalServer;
 458                 $fname = "Article::updateArticle";
 459
 460                 if ( $this->mMinorEdit ) { $me1 = 1; } else { $me1 = 0; }
 461                 if ( $minor && $wgUser->getID() ) { $me2 = 1; } else { $me2 = 0; }
 462                 if ( preg_match( "/^((" . $wgMwRedir->getBaseRegex() . ")[^\\n]+)/i", $text, $m ) ) {
 463                         $redir = 1;
 464                         $text = $m[1] . "\n"; # Remove all content but redirect
 465                 }
 466                 else { $redir = 0; }
 467
 468                 $text = $this->preSaveTransform( $text );
 469
 470                 # Update article, but only if changed.
 471
 472                 if( $wgDBtransactions ) {
 473                         $sql = "BEGIN";
 474                         wfQuery( $sql, DB_WRITE );
 475                 }
 476                 $oldtext = $this->getContent( true );
 477
 478                 if ( 0 != strcmp( $text, $oldtext ) ) {
 479                         $this->mCountAdjustment = $this->isCountable( $text )
 480                           - $this->isCountable( $oldtext );
 481
 482                         $now = wfTimestampNow();
 483                         $won = wfInvertTimestamp( $now );
 484                         $sql = "UPDATE cur SET cur_text='" . wfStrencode( $text ) .
 485                           "',cur_comment='" .  wfStrencode( $summary ) .
 486                           "',cur_minor_edit={$me2}, cur_user=" . $wgUser->getID() .
 487                           ",cur_timestamp='{$now}',cur_user_text='" .
 488                           wfStrencode( $wgUser->getName() ) .
 489                           "',cur_is_redirect={$redir}, cur_is_new=0, cur_touched='{$now}', inverse_timestamp='{$won}' " .
 490                           "WHERE cur_id=" . $this->getID() .
 491                           " AND cur_timestamp='" . $this->getTimestamp() . "'";
 492                         $res = wfQuery( $sql, DB_WRITE, $fname );
 493
 494                         if( wfAffectedRows() == 0 ) {
 495                                 /* Belated edit conflict! Run away!! */
 496                                 return false;
 497                         }
 498
 499                         # This overwrites $oldtext if revision compression is on
 500                         $flags = Article::compressRevisionText( $oldtext );
 501
 502                         $sql = "INSERT INTO old (old_namespace,old_title,old_text," .
 503                           "old_comment,old_user,old_user_text,old_timestamp," .
 504                           "old_minor_edit,inverse_timestamp,old_flags) VALUES (" .
 505                           $this->mTitle->getNamespace() . ", '" .
 506                           wfStrencode( $this->mTitle->getDBkey() ) . "', '" .
 507                           wfStrencode( $oldtext ) . "', '" .
 508                           wfStrencode( $this->getComment() ) . "', " .
 509                           $this->getUser() . ", '" .
 510                           wfStrencode( $this->getUserText() ) . "', '" .
 511                           $this->getTimestamp() . "', " . $me1 . ", '" .
 512                           wfInvertTimestamp( $this->getTimestamp() ) . "','$flags')";
 513                         $res = wfQuery( $sql, DB_WRITE, $fname );
 514                         $oldid = wfInsertID( $res );
 515
 516                         $bot = (int)($wgUser->isBot() || $forceBot);
 517                         RecentChange::notifyEdit( $now, $this->mTitle, $me2, $wgUser, $summary,
 518                                 $oldid, $this->getTimestamp(), $bot );
 519                         Article::onArticleEdit( $this->mTitle );
 520                 }
 521
 522                 if( $wgDBtransactions ) {
 523                         $sql = "COMMIT";
 524                         wfQuery( $sql, DB_WRITE );
 525                 }
 526
 527                 if ($watchthis) {
 528                         if (!$this->mTitle->userIsWatching()) $this->watch();
 529                 } else {
 530                         if ( $this->mTitle->userIsWatching() ) {
 531                                 $this->unwatch();
 532                         }
 533                 }
 534                 # standard deferred updates
 535                 $this->editUpdates( $text );
 536
 537
 538                 $urls = array();
 539                 # Template namespace
 540                 # Purge all articles linking here
 541                 if ( $this->mTitle->getNamespace() == NS_TEMPLATE) {
 542                         $titles = $this->mTitle->getLinksTo();
 543                         Title::touchArray( $titles );
 544                         if ( $wgUseSquid ) {
 545                                 foreach ( $titles as $title ) {
 546                                         $urls[] = $title->getInternalURL();
 547                                 }
 548                         }
 549                 }
 550
 551                 # Squid updates
 552                 if ( $wgUseSquid ) {
 553                         $urls = array_merge( $urls, $this->mTitle->getSquidURLs() );
 554                         $u = new SquidUpdate( $urls );
 555                         $u->doUpdate();
 556                 }
 557
 558                 $this->showArticle( $text, wfMsg( "updated" ) );
 559                 return true;
 560         }
 561
 562         # After we've either updated or inserted the article, update
 563         # the link tables and redirect to the new page.
 564
 565         function showArticle( $text, $subtitle )
 566         {
 567                 global $wgOut, $wgUser, $wgLinkCache;
 568                 global $wgMwRedir;
 569
 570                 $wgLinkCache = new LinkCache();
 571
 572                 # Get old version of link table to allow incremental link updates
 573                 $wgLinkCache->preFill( $this->mTitle );
 574                 $wgLinkCache->clear();
 575
 576                 # Now update the link cache by parsing the text
 577                 $wgOut = new OutputPage();
 578                 $wgOut->addWikiText( $text );
 579
 580                 if( $wgMwRedir->matchStart( $text ) )
 581                         $r = "redirect=no";
 582                 else
 583                         $r = "";
 584                 $wgOut->redirect( $this->mTitle->getFullURL( $r ) );
 585         }
 586
 587         # Add this page to my watchlist
 588
 589         function watch( $add = true )
 590         {
 591                 global $wgUser, $wgOut, $wgLang;
 592                 global $wgDeferredUpdateList;
 593
 594                 if ( 0 == $wgUser->getID() ) {
 595                         $wgOut->errorpage( "watchnologin", "watchnologintext" );
 596                         return;
 597                 }
 598                 if ( wfReadOnly() ) {
 599                         $wgOut->readOnlyPage();
 600                         return;
 601                 }
 602                 if( $add )
 603                         $wgUser->addWatch( $this->mTitle );
 604                 else
 605                         $wgUser->removeWatch( $this->mTitle );
 606
 607                 $wgOut->setPagetitle( wfMsg( $add ? "addedwatch" : "removedwatch" ) );
 608                 $wgOut->setRobotpolicy( "noindex,follow" );
 609
 610                 $sk = $wgUser->getSkin() ;
 611                 $link = $sk->makeKnownLink ( $this->mTitle->getPrefixedText() ) ;
 612
 613                 if($add)
 614                         $text = wfMsg( "addedwatchtext", $link );
 615                 else
 616                         $text = wfMsg( "removedwatchtext", $link );
 617                 $wgOut->addHTML( $text );
 618
 619                 $up = new UserUpdate();
 620                 array_push( $wgDeferredUpdateList, $up );
 621
 622                 $wgOut->returnToMain( false );
 623         }
 624
 625         function unwatch()
 626         {
 627                 $this->watch( false );
 628         }
 629
 630         function protect( $limit = "sysop" )
 631         {
 632                 global $wgUser, $wgOut;
 633
 634                 if ( ! $wgUser->isSysop() ) {
 635                         $wgOut->sysopRequired();
 636                         return;
 637                 }
 638                 if ( wfReadOnly() ) {
 639                         $wgOut->readOnlyPage();
 640                         return;
 641                 }
 642                 $id = $this->mTitle->getArticleID();
 643                 if ( 0 == $id ) {
 644                         $wgOut->fatalEror( wfMsg( "badarticleerror" ) );
 645                         return;
 646                 }
 647         $sql = "UPDATE cur SET cur_touched='" . wfTimestampNow() . "'," .
 648                         "cur_restrictions='{$limit}' WHERE cur_id={$id}";
 649                 wfQuery( $sql, DB_WRITE, "Article::protect" );
 650
 651                 $log = new LogPage( wfMsg( "protectlogpage" ), wfMsg( "protectlogtext" ) );
 652                 if ( $limit === "" ) {
 653                         $log->addEntry( wfMsg( "unprotectedarticle", $this->mTitle->getPrefixedText() ), "" );
 654                 } else {
 655                         $log->addEntry( wfMsg( "protectedarticle", $this->mTitle->getPrefixedText() ), "" );
 656                 }
 657                 $wgOut->redirect( $this->mTitle->getFullURL() );
 658         }
 659
 660         function unprotect()
 661         {
 662                 return $this->protect( "" );
 663         }
 664
 665         function delete()
 666         {
 667                 global $wgUser, $wgOut, $wgMessageCache;
 668                 global $wpConfirm, $wpReason, $image, $oldimage;
 669                 $fname = "Article::delete";
 670
 671                 # This code desperately needs to be totally rewritten
 672
 673                 if ( ( ! $wgUser->isSysop() ) ) {
 674                         $wgOut->sysopRequired();
 675                         return;
 676                 }
 677                 if ( wfReadOnly() ) {
 678                         $wgOut->readOnlyPage();
 679                         return;
 680                 }
 681
 682                 # Can't delete MediaWiki namespace
 683                 if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
 684                         $wgOut->fatalError( wfMsg( "cannotdelete" ) );
 685                         return;
 686                 }
 687
 688                 # Better double-check that it hasn't been deleted yet!
 689                 $wgOut->setPagetitle( wfMsg( "confirmdelete" ) );
 690                 if ( ( "" == trim( $this->mTitle->getText() ) )
 691                   or ( $this->mTitle->getArticleId() == 0 ) ) {
 692                         $wgOut->fatalError( wfMsg( "cannotdelete" ) );
 693                         return;
 694                 }
 695
 696                 if ( @$_POST["wpConfirm"] ) {
 697                         $this->doDelete();
 698                         return;
 699                 }
 700
 701                 # determine whether this page has earlier revisions
 702                 # and insert a warning if it does
 703                 # we select the text because it might be useful below
 704                 $ns = $this->mTitle->getNamespace();
 705                 $title = $this->mTitle->getDBkey();
 706                 $etitle = wfStrencode( $title );
 707                 $sql = "SELECT old_text,old_flags FROM old WHERE old_namespace=$ns and old_title='$etitle' ORDER BY inverse_timestamp LIMIT 1";
 708                 $res = wfQuery( $sql, DB_READ, $fname );
 709                 if( ($old=wfFetchObject($res)) && !$wpConfirm ) {
 710                         $skin=$wgUser->getSkin();
 711                         $wgOut->addHTML("<B>".wfMsg("historywarning"));
 712                         $wgOut->addHTML( $skin->historyLink() ."</B><P>");
 713                 }
 714
 715                 $sql="SELECT cur_text FROM cur WHERE cur_namespace=$ns and cur_title='$etitle'";
 716                 $res=wfQuery($sql, DB_READ, $fname);
 717                 if( ($s=wfFetchObject($res))) {
 718
 719                         # if this is a mini-text, we can paste part of it into the deletion reason
 720
 721                         #if this is empty, an earlier revision may contain "useful" text
 722                         $blanked = false;
 723                         if($s->cur_text!="") {
 724                                 $text=$s->cur_text;
 725                         } else {
 726                                 if($old) {
 727                                         $text = Article::getRevisionText( $old );
 728                                         $blanked = true;
 729                                 }
 730
 731                         }
 732
 733                         $length=strlen($text);
 734
 735                         # this should not happen, since it is not possible to store an empty, new
 736                         # page. Let's insert a standard text in case it does, though
 737                         if($length==0 && !$wpReason) { $wpReason=wfmsg("exblank");}
 738
 739
 740                         if($length < 500 && !$wpReason) {
 741
 742                                 # comment field=255, let's grep the first 150 to have some user
 743                                 # space left
 744                                 $text=substr($text,0,150);
 745                                 # let's strip out newlines and HTML tags
 746                                 $text=preg_replace("/\"/","'",$text);
 747                                 $text=preg_replace("/\</","&lt;",$text);
 748                                 $text=preg_replace("/\>/","&gt;",$text);
 749                                 $text=preg_replace("/[\n\r]/","",$text);
 750                                 if(!$blanked) {
 751                                         $wpReason=wfMsg("excontent"). " '".$text;
 752                                 } else {
 753                                         $wpReason=wfMsg("exbeforeblank") . " '".$text;
 754                                 }
 755                                 if($length>150) { $wpReason .= "..."; } # we've only pasted part of the text
 756                                 $wpReason.="'";
 757                         }
 758                 }
 759
 760                 return $this->confirmDelete();
 761         }
 762
 763         function confirmDelete( $par = "" )
 764         {
 765                 global $wgOut;
 766                 global $wpReason;
 767
 768                 wfDebug( "Article::confirmDelete\n" );
 769
 770                 $sub = htmlspecialchars( $this->mTitle->getPrefixedText() );
 771                 $wgOut->setSubtitle( wfMsg( "deletesub", $sub ) );
 772                 $wgOut->setRobotpolicy( "noindex,nofollow" );
 773                 $wgOut->addWikiText( wfMsg( "confirmdeletetext" ) );
 774
 775                 $formaction = $this->mTitle->escapeLocalURL( "action=delete" . $par );
 776
 777                 $confirm = wfMsg( "confirm" );
 778                 $check = wfMsg( "confirmcheck" );
 779                 $delcom = wfMsg( "deletecomment" );
 780
 781                 $wgOut->addHTML( "
 782 <form id=\"deleteconfirm\" method=\"post\" action=\"{$formaction}\">
 783 <table border=0><tr><td align=right>
 784 {$delcom}:</td><td align=left>
 785 <input type=text size=60 name=\"wpReason\" value=\"" . htmlspecialchars( $wpReason ) . "\">
 786 </td></tr><tr><td>&nbsp;</td></tr>
 787 <tr><td align=right>
 788 <input type=checkbox name=\"wpConfirm\" value='1' id=\"wpConfirm\">
 789 </td><td><label for=\"wpConfirm\">{$check}</label></td>
 790 </tr><tr><td>&nbsp;</td><td>
 791 <input type=submit name=\"wpConfirmB\" value=\"{$confirm}\">
 792 </td></tr></table></form>\n" );
 793
 794                 $wgOut->returnToMain( false );
 795         }
 796
 797         function doDelete()
 798         {
 799                 global $wgOut, $wgUser, $wgLang;
 800                 global $wpReason;
 801                 $fname = "Article::doDelete";
 802                 wfDebug( "$fname\n" );
 803
 804                 if ( $this->doDeleteArticle() ) {
 805                         $deleted = $this->mTitle->getPrefixedText();
 806
 807                         $wgOut->setPagetitle( wfMsg( "actioncomplete" ) );
 808                         $wgOut->setRobotpolicy( "noindex,nofollow" );
 809
 810                         $sk = $wgUser->getSkin();
 811                         $loglink = $sk->makeKnownLink( $wgLang->getNsText(
 812                           Namespace::getWikipedia() ) .
 813                           ":" . wfMsg( "dellogpage" ), wfMsg( "deletionlog" ) );
 814
 815                         $text = wfMsg( "deletedtext", $deleted, $loglink );
 816
 817                         $wgOut->addHTML( "<p>" . $text );
 818                         $wgOut->returnToMain( false );
 819                 } else {
 820                         $wgOut->fatalError( wfMsg( "cannotdelete" ) );
 821                 }
 822         }
 823
 824         # Delete the article, returns success
 825         function doDeleteArticle()
 826         {
 827                 global $wgUser, $wgLang, $wgRequest;
 828                 global  $wgUseSquid, $wgDeferredUpdateList, $wgInternalServer;
 829
 830                 $fname = "Article::doDeleteArticle";
 831                 wfDebug( "$fname\n" );
 832
 833                 $ns = $this->mTitle->getNamespace();
 834                 $t = wfStrencode( $this->mTitle->getDBkey() );
 835                 $id = $this->mTitle->getArticleID();
 836
 837                 if ( "" == $t || $id == 0 ) {
 838                         return false;
 839                 }
 840
 841                 $u = new SiteStatsUpdate( 0, 1, -$this->isCountable( $this->getContent( true ) ) );
 842                 array_push( $wgDeferredUpdateList, $u );
 843
 844                 $linksTo = $this->mTitle->getLinksTo();
 845
 846                 # Squid purging
 847                 if ( $wgUseSquid ) {
 848                         $urls = array(
 849                                 $this->mTitle->getInternalURL(),
 850                                 $this->mTitle->getInternalURL( "history" )
 851                         );
 852                         foreach ( $linksTo as $linkTo ) {
 853                                 $urls[] = $linkTo->getInternalURL();
 854                         }
 855
 856                         $u = new SquidUpdate( $urls );
 857                         array_push( $wgDeferredUpdateList, $u );
 858
 859                 }
 860
 861                 # Client and file cache invalidation
 862                 Title::touchArray( $linksTo );
 863
 864                 # Move article and history to the "archive" table
 865                 $sql = "INSERT INTO archive (ar_namespace,ar_title,ar_text," .
 866                   "ar_comment,ar_user,ar_user_text,ar_timestamp,ar_minor_edit," .
 867                   "ar_flags) SELECT cur_namespace,cur_title,cur_text,cur_comment," .
 868                   "cur_user,cur_user_text,cur_timestamp,cur_minor_edit,0 FROM cur " .
 869                   "WHERE cur_namespace={$ns} AND cur_title='{$t}'";
 870                 wfQuery( $sql, DB_WRITE, $fname );
 871
 872                 $sql = "INSERT INTO archive (ar_namespace,ar_title,ar_text," .
 873                   "ar_comment,ar_user,ar_user_text,ar_timestamp,ar_minor_edit," .
 874                   "ar_flags) SELECT old_namespace,old_title,old_text,old_comment," .
 875                   "old_user,old_user_text,old_timestamp,old_minor_edit,old_flags " .
 876                   "FROM old WHERE old_namespace={$ns} AND old_title='{$t}'";
 877                 wfQuery( $sql, DB_WRITE, $fname );
 878
 879                 # Now that it's safely backed up, delete it
 880
 881                 $sql = "DELETE FROM cur WHERE cur_namespace={$ns} AND " .
 882                   "cur_title='{$t}'";
 883                 wfQuery( $sql, DB_WRITE, $fname );
 884
 885                 $sql = "DELETE FROM old WHERE old_namespace={$ns} AND " .
 886                   "old_title='{$t}'";
 887                 wfQuery( $sql, DB_WRITE, $fname );
 888
 889                 $sql = "DELETE FROM recentchanges WHERE rc_namespace={$ns} AND " .
 890                   "rc_title='{$t}'";
 891                 wfQuery( $sql, DB_WRITE, $fname );
 892
 893                 # Finally, clean up the link tables
 894                 $t = wfStrencode( $this->mTitle->getPrefixedDBkey() );
 895
 896                 Article::onArticleDelete( $this->mTitle );
 897
 898                 $sql = "INSERT INTO brokenlinks (bl_from,bl_to) VALUES ";
 899                 $first = true;
 900
 901                 foreach ( $linksTo as $titleObj ) {
 902                         if ( ! $first ) { $sql .= ","; }
 903                         $first = false;
 904                         # Get article ID. Efficient because it was loaded into the cache by getLinksTo().
 905                         $linkID = $titleObj->getArticleID();
 906                         $sql .= "({$linkID},'{$t}')";
 907                 }
 908                 if ( ! $first ) {
 909                         wfQuery( $sql, DB_WRITE, $fname );
 910                 }
 911
 912                 $sql = "DELETE FROM links WHERE l_to={$id}";
 913                 wfQuery( $sql, DB_WRITE, $fname );
 914
 915                 $sql = "DELETE FROM links WHERE l_from={$id}";
 916                 wfQuery( $sql, DB_WRITE, $fname );
 917
 918                 $sql = "DELETE FROM imagelinks WHERE il_from={$id}";
 919                 wfQuery( $sql, DB_WRITE, $fname );
 920
 921                 $sql = "DELETE FROM brokenlinks WHERE bl_from={$id}";
 922                 wfQuery( $sql, DB_WRITE, $fname );
 923
 924                 $log = new LogPage( wfMsg( "dellogpage" ), wfMsg( "dellogpagetext" ) );
 925                 $art = $this->mTitle->getPrefixedText();
 926                 $wpReason = $wgRequest->getText( "wpReason" );
 927                 $log->addEntry( wfMsg( "deletedarticle", $art ), $wpReason );
 928
 929                 # Clear the cached article id so the interface doesn't act like we exist
 930                 $this->mTitle->resetArticleID( 0 );
 931                 $this->mTitle->mArticleID = 0;
 932                 return true;
 933         }
 934
 935         function rollback()
 936         {
 937                 global $wgUser, $wgLang, $wgOut, $wgRequest;
 938
 939                 if ( ! $wgUser->isSysop() ) {
 940                         $wgOut->sysopRequired();
 941                         return;
 942                 }
 943                 if ( wfReadOnly() ) {
 944                         $wgOut->readOnlyPage( $this->getContent() );
 945                         return;
 946                 }
 947
 948                 # Enhanced rollback, marks edits rc_bot=1
 949                 $bot = $wgRequest->getBool( 'bot' );
 950
 951                 # Replace all this user's current edits with the next one down
 952                 $tt = wfStrencode( $this->mTitle->getDBKey() );
 953                 $n = $this->mTitle->getNamespace();
 954
 955                 # Get the last editor
 956                 $sql = "SELECT cur_id,cur_user,cur_user_text,cur_comment FROM cur WHERE cur_title='{$tt}' AND cur_namespace={$n}";
 957                 $res = wfQuery( $sql, DB_READ );
 958                 if( ($x = wfNumRows( $res )) != 1 ) {
 959                         # Something wrong
 960                         $wgOut->addHTML( wfMsg( "notanarticle" ) );
 961                         return;
 962                 }
 963                 $s = wfFetchObject( $res );
 964                 $ut = wfStrencode( $s->cur_user_text );
 965                 $uid = $s->cur_user;
 966                 $pid = $s->cur_id;
 967
 968                 $from = str_replace( '_', ' ', $wgRequest->getVal( "from" ) );
 969                 if( $from != $s->cur_user_text ) {
 970                         $wgOut->setPageTitle(wfmsg("rollbackfailed"));
 971                         $wgOut->addWikiText( wfMsg( "alreadyrolled",
 972                                 htmlspecialchars( $this->mTitle->getPrefixedText()),
 973                                 htmlspecialchars( $from ),
 974                                 htmlspecialchars( $s->cur_user_text ) ) );
 975                         if($s->cur_comment != "") {
 976                                 $wgOut->addHTML(
 977                                         wfMsg("editcomment",
 978                                         htmlspecialchars( $s->cur_comment ) ) );
 979                         }
 980                         return;
 981                 }
 982
 983                 # Get the last edit not by this guy
 984                 $sql = "SELECT old_text,old_user,old_user_text,old_timestamp,old_flags
 985                 FROM old USE INDEX (name_title_timestamp)
 986                 WHERE old_namespace={$n} AND old_title='{$tt}'
 987                 AND (old_user <> {$uid} OR old_user_text <> '{$ut}')
 988                 ORDER BY inverse_timestamp LIMIT 1";
 989                 $res = wfQuery( $sql, DB_READ );
 990                 if( wfNumRows( $res ) != 1 ) {
 991                         # Something wrong
 992                         $wgOut->setPageTitle(wfMsg("rollbackfailed"));
 993                         $wgOut->addHTML( wfMsg( "cantrollback" ) );
 994                         return;
 995                 }
 996                 $s = wfFetchObject( $res );
 997
 998                 if ( $bot ) {
 999                         # Mark all reverted edits as bot
1000                         $sql = "UPDATE recentchanges SET rc_bot=1 WHERE
1001                                 rc_cur_id=$pid AND rc_user=$uid AND rc_timestamp > '{$s->old_timestamp}'";
1002                         wfQuery( $sql, DB_WRITE, $fname );
1003                 }
1004
1005                 # Save it!
1006                 $newcomment = wfMsg( "revertpage", $s->old_user_text, $from );
1007                 $wgOut->setPagetitle( wfMsg( "actioncomplete" ) );
1008                 $wgOut->setRobotpolicy( "noindex,nofollow" );
1009                 $wgOut->addHTML( "<h2>" . $newcomment . "</h2>\n<hr>\n" );
1010                 $this->updateArticle( Article::getRevisionText( $s ), $newcomment, 1, $this->mTitle->userIsWatching(), $bot );
1011                 Article::onArticleEdit( $this->mTitle );
1012                 $wgOut->returnToMain( false );
1013         }
1014
1015
1016         # Do standard deferred updates after page view
1017
1018         /* private */ function viewUpdates()
1019         {
1020                 global $wgDeferredUpdateList;
1021                 if ( 0 != $this->getID() ) {
1022                         global $wgDisableCounters;
1023                         if( !$wgDisableCounters ) {
1024                                 Article::incViewCount( $this->getID() );
1025                                 $u = new SiteStatsUpdate( 1, 0, 0 );
1026                                 array_push( $wgDeferredUpdateList, $u );
1027                         }
1028                         $u = new UserTalkUpdate( 0, $this->mTitle->getNamespace(),
1029                           $this->mTitle->getDBkey() );
1030                         array_push( $wgDeferredUpdateList, $u );
1031                 }
1032         }
1033
1034         # Do standard deferred updates after page edit.
1035         # Every 1000th edit, prune the recent changes table.
1036
1037         /* private */ function editUpdates( $text )
1038         {
1039                 global $wgDeferredUpdateList, $wgDBname, $wgMemc;
1040                 global $wgMessageCache;
1041
1042                 wfSeedRandom();
1043                 if ( 0 == mt_rand( 0, 999 ) ) {
1044                         $cutoff = wfUnix2Timestamp( time() - ( 7 * 86400 ) );
1045                         $sql = "DELETE FROM recentchanges WHERE rc_timestamp < '{$cutoff}'";
1046                         wfQuery( $sql, DB_WRITE );
1047                 }
1048                 $id = $this->getID();
1049                 $title = $this->mTitle->getPrefixedDBkey();
1050                 $shortTitle = $this->mTitle->getDBkey();
1051
1052                 $adj = $this->mCountAdjustment;
1053
1054                 if ( 0 != $id ) {
1055                         $u = new LinksUpdate( $id, $title );
1056                         array_push( $wgDeferredUpdateList, $u );
1057                         $u = new SiteStatsUpdate( 0, 1, $adj );
1058                         array_push( $wgDeferredUpdateList, $u );
1059                         $u = new SearchUpdate( $id, $title, $text );
1060                         array_push( $wgDeferredUpdateList, $u );
1061
1062                         $u = new UserTalkUpdate( 1, $this->mTitle->getNamespace(), $shortTitle );
1063                         array_push( $wgDeferredUpdateList, $u );
1064
1065                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
1066                                 $wgMessageCache->replace( $shortTitle, $text );
1067                         }
1068                 }
1069         }
1070
1071         /* private */ function setOldSubtitle()
1072         {
1073                 global $wgLang, $wgOut;
1074
1075                 $td = $wgLang->timeanddate( $this->mTimestamp, true );
1076                 $r = wfMsg( "revisionasof", $td );
1077                 $wgOut->setSubtitle( "({$r})" );
1078         }
1079
1080         # This function is called right before saving the wikitext,
1081         # so we can do things like signatures and links-in-context.
1082
1083         function preSaveTransform( $text )
1084         {
1085                 global $wgParser, $wgUser;
1086                 return $wgParser->preSaveTransform( $text, $this->mTitle, $wgUser, ParserOptions::newFromUser( $wgUser ) );
1087         }
1088
1089         /* Caching functions */
1090
1091         # checkLastModified returns true if it has taken care of all
1092         # output to the client that is necessary for this request.
1093         # (that is, it has sent a cached version of the page)
1094         function tryFileCache() {
1095                 static $called = false;
1096                 if( $called ) {
1097                         wfDebug( " tryFileCache() -- called twice!?\n" );
1098                         return;
1099                 }
1100                 $called = true;
1101                 if($this->isFileCacheable()) {
1102                         $touched = $this->mTouched;
1103                         if( $this->mTitle->getPrefixedDBkey() == wfMsg( "mainpage" ) ) {
1104                                 # Expire the main page quicker
1105                                 $expire = wfUnix2Timestamp( time() - 3600 );
1106                                 $touched = max( $expire, $touched );
1107                         }
1108                         $cache = new CacheManager( $this->mTitle );
1109                         if($cache->isFileCacheGood( $touched )) {
1110                                 global $wgOut;
1111                                 wfDebug( " tryFileCache() - about to load\n" );
1112                                 $cache->loadFromFileCache();
1113                                 return true;
1114                         } else {
1115                                 wfDebug( " tryFileCache() - starting buffer\n" );
1116                                 ob_start( array(&$cache, 'saveToFileCache' ) );
1117                         }
1118                 } else {
1119                         wfDebug( " tryFileCache() - not cacheable\n" );
1120                 }
1121         }
1122
1123         function isFileCacheable() {
1124                 global $wgUser, $wgUseFileCache, $wgShowIPinHeader;
1125                 global $action, $oldid, $diff, $redirect, $printable;
1126                 return $wgUseFileCache
1127                         and (!$wgShowIPinHeader)
1128                         and ($this->getID() != 0)
1129                         and ($wgUser->getId() == 0)
1130                         and (!$wgUser->getNewtalk())
1131                         and ($this->mTitle->getNamespace() != Namespace::getSpecial())
1132                         and ($action == "view")
1133                         and (!isset($oldid))
1134                         and (!isset($diff))
1135                         and (!isset($redirect))
1136                         and (!isset($printable))
1137                         and (!$this->mRedirectedFrom);
1138         }
1139
1140         function checkTouched() {
1141                 $id = $this->getID();
1142                 $sql = "SELECT cur_touched,cur_is_redirect FROM cur WHERE cur_id=$id";
1143                 $res = wfQuery( $sql, DB_READ, "Article::checkTouched" );
1144                 if( $s = wfFetchObject( $res ) ) {
1145                         $this->mTouched = $s->cur_touched;
1146                         return !$s->cur_is_redirect;
1147                 } else {
1148                         return false;
1149                 }
1150         }
1151
1152         /* static */ function incViewCount( $id )
1153         {
1154                 $id = intval( $id );
1155                 global $wgHitcounterUpdateFreq;
1156
1157                 if( $wgHitcounterUpdateFreq <= 1 ){ //
1158                         wfQuery("UPDATE cur SET cur_counter = cur_counter + 1 " .
1159                                 "WHERE cur_id = $id", DB_WRITE);
1160                         return;
1161                 }
1162
1163                 # Not important enough to warrant an error page in case of failure
1164                 $oldignore = wfIgnoreSQLErrors( true );
1165
1166                 wfQuery("INSERT INTO hitcounter (hc_id) VALUES ({$id})", DB_WRITE);
1167
1168                 $checkfreq = intval( $wgHitcounterUpdateFreq/25 + 1 );
1169                 if( (rand() % $checkfreq != 0) or (wfLastErrno() != 0) ){
1170                         # Most of the time (or on SQL errors), skip row count check
1171                         wfIgnoreSQLErrors( $oldignore );
1172                         return;
1173                 }
1174
1175                 $res = wfQuery("SELECT COUNT(*) as n FROM hitcounter", DB_WRITE);
1176                 $row = wfFetchObject( $res );
1177                 $rown = intval( $row->n );
1178                 if( $rown >= $wgHitcounterUpdateFreq ){
1179                         wfProfileIn( "Article::incViewCount-collect" );
1180                         $old_user_abort = ignore_user_abort( true );
1181
1182                         wfQuery("LOCK TABLES hitcounter WRITE", DB_WRITE);
1183                         wfQuery("CREATE TEMPORARY TABLE acchits TYPE=HEAP ".
1184                                 "SELECT hc_id,COUNT(*) AS hc_n FROM hitcounter ".
1185                                 "GROUP BY hc_id", DB_WRITE);
1186                         wfQuery("DELETE FROM hitcounter", DB_WRITE);
1187                         wfQuery("UNLOCK TABLES", DB_WRITE);
1188                         wfQuery("UPDATE cur,acchits SET cur_counter=cur_counter + hc_n ".
1189                                 "WHERE cur_id = hc_id", DB_WRITE);
1190                         wfQuery("DROP TABLE acchits", DB_WRITE);
1191
1192                         ignore_user_abort( $old_user_abort );
1193                         wfProfileOut( "Article::incViewCount-collect" );
1194                 }
1195                 wfIgnoreSQLErrors( $oldignore );
1196         }
1197
1198         # The onArticle*() functions are supposed to be a kind of hooks
1199         # which should be called whenever any of the specified actions
1200         # are done.
1201         #
1202         # This is a good place to put code to clear caches, for instance.
1203
1204         # This is called on page move and undelete, as well as edit
1205         /* static */ function onArticleCreate($title_obj){
1206                 global $wgEnablePersistentLC, $wgEnableParserCache, $wgUseSquid, $wgDeferredUpdateList;
1207
1208                 $titles = $title_obj->getBrokenLinksTo();
1209
1210                 # Purge squid
1211                 if ( $wgUseSquid ) {
1212                         $urls = $title_obj->getSquidURLs();
1213                         foreach ( $titles as $linkTitle ) {
1214                                 $urls[] = $linkTitle->getInternalURL();
1215                         }
1216                         $u = new SquidUpdate( $urls );
1217                         array_push( $wgDeferredUpdateList, $u );
1218                 }
1219
1220                 # Clear persistent link cache
1221                 if ( $wgEnablePersistentLC ) {
1222                         LinkCache::linksccClearBrokenLinksTo( $title_obj->getPrefixedDBkey() );
1223                 }
1224
1225                 # Clear parser cache (not really used)
1226                 if ( $wgEnableParserCache ) {
1227                         OutputPage::parsercacheClearBrokenLinksTo( $title_obj->getPrefixedDBkey() );
1228                 }
1229         }
1230
1231         /* static */ function onArticleDelete($title_obj){
1232                 global $wgEnablePersistentLC, $wgEnableParserCache;
1233                 if ( $wgEnablePersistentLC ) {
1234                         LinkCache::linksccClearLinksTo( $title_obj->getArticleID() );
1235                 }
1236                 if ( $wgEnableParserCache ) {
1237                         OutputPage::parsercacheClearLinksTo( $title_obj->getArticleID() );
1238                 }
1239         }
1240
1241         /* static */ function onArticleEdit($title_obj){
1242                 global $wgEnablePersistentLC, $wgEnableParserCache;
1243                 if ( $wgEnablePersistentLC ) {
1244                         LinkCache::linksccClearPage( $title_obj->getArticleID() );
1245                 }
1246                 if ( $wgEnableParserCache ) {
1247                         OutputPage::parsercacheClearPage( $title_obj->getArticleID(), $title_obj->getNamespace() );
1248                 }
1249         }
1250 }
1251
1252 ?>