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->getFullURL() );
 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                                 $this->mTitle->getInternalURL(),
 434                                 $this->mTitle->getInternalURL('action=history')
 435                         );
 436                         wfPurgeSquidServers($urlArr);
 437                         /* this needs to be done after LinksUpdate */
 438                         $u = new SquidUpdate($this->mTitle);
 439                         array_push( $wgDeferredUpdateList, $u );
 440                 }
 441
 442                 $this->showArticle( $text, wfMsg( "newarticle" ) );
 443         }
 444
 445
 446         /* Side effects: loads last edit */
 447         function getTextOfLastEditWithSectionReplacedOrAdded($section, $text, $summary = ""){
 448                 $this->loadLastEdit();
 449                 $oldtext = $this->getContent();
 450                 if ($section != "") {
 451                         if($section=="new") {
 452                                 if($summary) $subject="== {$summary} ==\n\n";
 453                                 $text=$oldtext."\n\n".$subject.$text;
 454                         } else {
 455                                 $secs=preg_split("/(^=+.*?=+|^<h[1-6].*?>.*?<\/h[1-6].*?>)/mi",
 456                                   $oldtext,-1,PREG_SPLIT_DELIM_CAPTURE);
 457                                 $secs[$section*2]=$text."\n\n"; // replace with edited
 458                                 if($section) { $secs[$section*2-1]=""; } // erase old headline
 459                                 $text=join("",$secs);
 460                         }
 461                 }
 462                 return $text;
 463         }
 464
 465         function updateArticle( $text, $summary, $minor, $watchthis, $forceBot = false )
 466         {
 467                 global $wgOut, $wgUser, $wgLinkCache;
 468                 global $wgDBtransactions, $wgMwRedir;
 469                 global $wgUseSquid, $wgInternalServer;
 470                 $fname = "Article::updateArticle";
 471
 472                 if ( $this->mMinorEdit ) { $me1 = 1; } else { $me1 = 0; }
 473                 if ( $minor && $wgUser->getID() ) { $me2 = 1; } else { $me2 = 0; }
 474                 if ( preg_match( "/^((" . $wgMwRedir->getBaseRegex() . ")[^\\n]+)/i", $text, $m ) ) {
 475                         $redir = 1;
 476                         $text = $m[1] . "\n"; # Remove all content but redirect
 477                 }
 478                 else { $redir = 0; }
 479
 480                 $text = $this->preSaveTransform( $text );
 481
 482                 # Update article, but only if changed.
 483
 484                 if( $wgDBtransactions ) {
 485                         $sql = "BEGIN";
 486                         wfQuery( $sql, DB_WRITE );
 487                 }
 488                 $oldtext = $this->getContent( true );
 489
 490                 if ( 0 != strcmp( $text, $oldtext ) ) {
 491                         $this->mCountAdjustment = $this->isCountable( $text )
 492                           - $this->isCountable( $oldtext );
 493
 494                         $now = wfTimestampNow();
 495                         $won = wfInvertTimestamp( $now );
 496                         $sql = "UPDATE cur SET cur_text='" . wfStrencode( $text ) .
 497                           "',cur_comment='" .  wfStrencode( $summary ) .
 498                           "',cur_minor_edit={$me2}, cur_user=" . $wgUser->getID() .
 499                           ",cur_timestamp='{$now}',cur_user_text='" .
 500                           wfStrencode( $wgUser->getName() ) .
 501                           "',cur_is_redirect={$redir}, cur_is_new=0, cur_touched='{$now}', inverse_timestamp='{$won}' " .
 502                           "WHERE cur_id=" . $this->getID() .
 503                           " AND cur_timestamp='" . $this->getTimestamp() . "'";
 504                         $res = wfQuery( $sql, DB_WRITE, $fname );
 505
 506                         if( wfAffectedRows() == 0 ) {
 507                                 /* Belated edit conflict! Run away!! */
 508                                 return false;
 509                         }
 510
 511                         # This overwrites $oldtext if revision compression is on
 512                         $flags = Article::compressRevisionText( $oldtext );
 513
 514                         $sql = "INSERT INTO old (old_namespace,old_title,old_text," .
 515                           "old_comment,old_user,old_user_text,old_timestamp," .
 516                           "old_minor_edit,inverse_timestamp,old_flags) VALUES (" .
 517                           $this->mTitle->getNamespace() . ", '" .
 518                           wfStrencode( $this->mTitle->getDBkey() ) . "', '" .
 519                           wfStrencode( $oldtext ) . "', '" .
 520                           wfStrencode( $this->getComment() ) . "', " .
 521                           $this->getUser() . ", '" .
 522                           wfStrencode( $this->getUserText() ) . "', '" .
 523                           $this->getTimestamp() . "', " . $me1 . ", '" .
 524                           wfInvertTimestamp( $this->getTimestamp() ) . "','$flags')";
 525                         $res = wfQuery( $sql, DB_WRITE, $fname );
 526                         $oldid = wfInsertID( $res );
 527
 528                         $bot = (int)($wgUser->isBot() || $forceBot);
 529                         RecentChange::notifyEdit( $now, $this->mTitle, $me2, $wgUser, $summary,
 530                                 $oldid, $this->getTimestamp(), $bot );
 531                         Article::onArticleEdit( $this->mTitle );
 532                 }
 533
 534                 if( $wgDBtransactions ) {
 535                         $sql = "COMMIT";
 536                         wfQuery( $sql, DB_WRITE );
 537                 }
 538
 539                 if ($watchthis) {
 540                         if (!$this->mTitle->userIsWatching()) $this->watch();
 541                 } else {
 542                         if ( $this->mTitle->userIsWatching() ) {
 543                                 $this->unwatch();
 544                         }
 545                 }
 546                 # standard deferred updates
 547                 $this->editUpdates( $text );
 548
 549                 # Squid updates
 550
 551                 if ( $wgUseSquid ) {
 552                         $urlArr = Array(
 553                                 $this->mTitle->getInternalURL(),
 554                                 $this->mTitle->getInternalURL('action=history')
 555                         );
 556                         wfPurgeSquidServers($urlArr);
 557                 }
 558
 559                 $this->showArticle( $text, wfMsg( "updated" ) );
 560                 return true;
 561         }
 562
 563         # After we've either updated or inserted the article, update
 564         # the link tables and redirect to the new page.
 565
 566         function showArticle( $text, $subtitle )
 567         {
 568                 global $wgOut, $wgUser, $wgLinkCache;
 569                 global $wgMwRedir;
 570
 571                 $wgLinkCache = new LinkCache();
 572
 573                 # Get old version of link table to allow incremental link updates
 574                 $wgLinkCache->preFill( $this->mTitle );
 575                 $wgLinkCache->clear();
 576
 577                 # Now update the link cache by parsing the text
 578                 $wgOut = new OutputPage();
 579                 $wgOut->addWikiText( $text );
 580
 581                 if( $wgMwRedir->matchStart( $text ) )
 582                         $r = "redirect=no";
 583                 else
 584                         $r = "";
 585                 $wgOut->redirect( $this->mTitle->getFullURL( $r ) );
 586         }
 587
 588         # Add this page to my watchlist
 589
 590         function watch( $add = true )
 591         {
 592                 global $wgUser, $wgOut, $wgLang;
 593                 global $wgDeferredUpdateList;
 594
 595                 if ( 0 == $wgUser->getID() ) {
 596                         $wgOut->errorpage( "watchnologin", "watchnologintext" );
 597                         return;
 598                 }
 599                 if ( wfReadOnly() ) {
 600                         $wgOut->readOnlyPage();
 601                         return;
 602                 }
 603                 if( $add )
 604                         $wgUser->addWatch( $this->mTitle );
 605                 else
 606                         $wgUser->removeWatch( $this->mTitle );
 607
 608                 $wgOut->setPagetitle( wfMsg( $add ? "addedwatch" : "removedwatch" ) );
 609                 $wgOut->setRobotpolicy( "noindex,follow" );
 610
 611                 $sk = $wgUser->getSkin() ;
 612                 $link = $sk->makeKnownLink ( $this->mTitle->getPrefixedText() ) ;
 613
 614                 if($add)
 615                         $text = wfMsg( "addedwatchtext", $link );
 616                 else
 617                         $text = wfMsg( "removedwatchtext", $link );
 618                 $wgOut->addHTML( $text );
 619
 620                 $up = new UserUpdate();
 621                 array_push( $wgDeferredUpdateList, $up );
 622
 623                 $wgOut->returnToMain( false );
 624         }
 625
 626         function unwatch()
 627         {
 628                 $this->watch( false );
 629         }
 630
 631         function protect( $limit = "sysop" )
 632         {
 633                 global $wgUser, $wgOut;
 634
 635                 if ( ! $wgUser->isSysop() ) {
 636                         $wgOut->sysopRequired();
 637                         return;
 638                 }
 639                 if ( wfReadOnly() ) {
 640                         $wgOut->readOnlyPage();
 641                         return;
 642                 }
 643                 $id = $this->mTitle->getArticleID();
 644                 if ( 0 == $id ) {
 645                         $wgOut->fatalEror( wfMsg( "badarticleerror" ) );
 646                         return;
 647                 }
 648         $sql = "UPDATE cur SET cur_touched='" . wfTimestampNow() . "'," .
 649                         "cur_restrictions='{$limit}' WHERE cur_id={$id}";
 650                 wfQuery( $sql, DB_WRITE, "Article::protect" );
 651
 652                 $log = new LogPage( wfMsg( "protectlogpage" ), wfMsg( "protectlogtext" ) );
 653                 if ( $limit === "" ) {
 654                         $log->addEntry( wfMsg( "unprotectedarticle", $this->mTitle->getPrefixedText() ), "" );
 655                 } else {
 656                         $log->addEntry( wfMsg( "protectedarticle", $this->mTitle->getPrefixedText() ), "" );
 657                 }
 658                 $wgOut->redirect( $this->mTitle->getFullURL() );
 659         }
 660
 661         function unprotect()
 662         {
 663                 return $this->protect( "" );
 664         }
 665
 666         function delete()
 667         {
 668                 global $wgUser, $wgOut, $wgMessageCache;
 669                 global $wpConfirm, $wpReason, $image, $oldimage;
 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 cached MediaWiki namespace (i.e. vital messages)
 683                 if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI && $wgMessageCache->isCacheable( $this->mTitle->getDBkey() ) ) {
 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($res))) {
 718
 719                         # if this is a mini-text, we can paste part of it into the deletion reason
 720
 721                         #if this is empty, an earlier revision may contain "useful" text
 722                         if($s->cur_text!="") {
 723                                 $text=$s->cur_text;
 724                         } else {
 725                                 if($old) {
 726                                         $text = Article::getRevisionText( $old );
 727                                         $blanked=1;
 728                                 }
 729
 730                         }
 731
 732                         $length=strlen($text);
 733
 734                         # this should not happen, since it is not possible to store an empty, new
 735                         # page. Let's insert a standard text in case it does, though
 736                         if($length==0 && !$wpReason) { $wpReason=wfmsg("exblank");}
 737
 738
 739                         if($length < 500 && !$wpReason) {
 740
 741                                 # comment field=255, let's grep the first 150 to have some user
 742                                 # space left
 743                                 $text=substr($text,0,150);
 744                                 # let's strip out newlines and HTML tags
 745                                 $text=preg_replace("/\"/","'",$text);
 746                                 $text=preg_replace("/\</","&lt;",$text);
 747                                 $text=preg_replace("/\>/","&gt;",$text);
 748                                 $text=preg_replace("/[\n\r]/","",$text);
 749                                 if(!$blanked) {
 750                                         $wpReason=wfMsg("excontent"). " '".$text;
 751                                 } else {
 752                                         $wpReason=wfMsg("exbeforeblank") . " '".$text;
 753                                 }
 754                                 if($length>150) { $wpReason .= "..."; } # we've only pasted part of the text
 755                                 $wpReason.="'";
 756                         }
 757                 }
 758
 759                 return $this->confirmDelete();
 760         }
 761
 762         function confirmDelete( $par = "" )
 763         {
 764                 global $wgOut;
 765                 global $wpReason;
 766
 767                 wfDebug( "Article::confirmDelete\n" );
 768
 769                 $sub = htmlspecialchars( $this->mTitle->getPrefixedText() );
 770                 $wgOut->setSubtitle( wfMsg( "deletesub", $sub ) );
 771                 $wgOut->setRobotpolicy( "noindex,nofollow" );
 772                 $wgOut->addWikiText( wfMsg( "confirmdeletetext" ) );
 773
 774                 $formaction = $this->mTitle->escapeLocalURL( "action=delete" . $par );
 775
 776                 $confirm = wfMsg( "confirm" );
 777                 $check = wfMsg( "confirmcheck" );
 778                 $delcom = wfMsg( "deletecomment" );
 779
 780                 $wgOut->addHTML( "
 781 <form id=\"deleteconfirm\" method=\"post\" action=\"{$formaction}\">
 782 <table border=0><tr><td align=right>
 783 {$delcom}:</td><td align=left>
 784 <input type=text size=60 name=\"wpReason\" value=\"" . htmlspecialchars( $wpReason ) . "\">
 785 </td></tr><tr><td>&nbsp;</td></tr>
 786 <tr><td align=right>
 787 <input type=checkbox name=\"wpConfirm\" value='1' id=\"wpConfirm\">
 788 </td><td><label for=\"wpConfirm\">{$check}</label></td>
 789 </tr><tr><td>&nbsp;</td><td>
 790 <input type=submit name=\"wpConfirmB\" value=\"{$confirm}\">
 791 </td></tr></table></form>\n" );
 792
 793                 $wgOut->returnToMain( false );
 794         }
 795
 796         function doDelete()
 797         {
 798                 global $wgOut, $wgUser, $wgLang;
 799                 global $wpReason;
 800                 $fname = "Article::doDelete";
 801                 wfDebug( "$fname\n" );
 802
 803                 $this->doDeleteArticle( $this->mTitle );
 804                 $deleted = $this->mTitle->getPrefixedText();
 805
 806                 $wgOut->setPagetitle( wfMsg( "actioncomplete" ) );
 807                 $wgOut->setRobotpolicy( "noindex,nofollow" );
 808
 809                 $sk = $wgUser->getSkin();
 810                 $loglink = $sk->makeKnownLink( $wgLang->getNsText(
 811                   Namespace::getWikipedia() ) .
 812                   ":" . wfMsg( "dellogpage" ), wfMsg( "deletionlog" ) );
 813
 814                 $text = wfMsg( "deletedtext", $deleted, $loglink );
 815
 816                 $wgOut->addHTML( "<p>" . $text );
 817                 $wgOut->returnToMain( false );
 818         }
 819
 820         function doDeleteArticle( $title )
 821         {
 822                 global $wgUser, $wgOut, $wgLang, $wgRequest;
 823                 global  $wgUseSquid, $wgDeferredUpdateList, $wgInternalServer;
 824
 825                 $fname = "Article::doDeleteArticle";
 826                 wfDebug( "$fname\n" );
 827
 828                 $ns = $title->getNamespace();
 829                 $t = wfStrencode( $title->getDBkey() );
 830                 $id = $title->getArticleID();
 831
 832                 if ( "" == $t ) {
 833                         $wgOut->fatalError( wfMsg( "cannotdelete" ) );
 834                         return;
 835                 }
 836
 837                 $u = new SiteStatsUpdate( 0, 1, -$this->isCountable( $this->getContent( true ) ) );
 838                 array_push( $wgDeferredUpdateList, $u );
 839
 840                 # Squid purging
 841                 if ( $wgUseSquid ) {
 842                         $urlArr = Array(
 843                                 $this->mTitle->getInternalURL(),
 844                                 $this->mTitle->getInternalURL('action=history')
 845                         );
 846                         wfPurgeSquidServers($urlArr);
 847
 848                         /* prepare the list of urls to purge */
 849                         $sql = "SELECT cur_namespace,cur_title FROM links,cur WHERE l_to={$id} and l_from=cur_id" ;
 850                         $res = wfQuery ( $sql, DB_READ ) ;
 851                         while ( $BL = wfFetchObject ( $res ) )
 852                         {
 853                                 $tobj = Title::MakeTitle( $BL->cur_namespace, $BL->cur_title ) ;
 854                                 $blurlArr[] = $tobj->getInternalURL();
 855                         }
 856                         wfFreeResult ( $res ) ;
 857                         $u = new SquidUpdate( $this->mTitle, $blurlArr );
 858                         array_push( $wgDeferredUpdateList, $u );
 859
 860                 }
 861
 862
 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
 895                 if ( 0 != $id ) {
 896
 897                         $t = wfStrencode( $title->getPrefixedDBkey() );
 898
 899                         Article::onArticleDelete( $title );
 900
 901                         $sql = "SELECT l_from FROM links WHERE l_to={$id}";
 902                         $res = wfQuery( $sql, DB_READ, $fname );
 903
 904                         $sql = "INSERT INTO brokenlinks (bl_from,bl_to) VALUES ";
 905                         $now = wfTimestampNow();
 906                         $sql2 = "UPDATE cur SET cur_touched='{$now}' WHERE cur_id IN (";
 907                         $first = true;
 908
 909                         while ( $s = wfFetchObject( $res ) ) {
 910                                 if ( ! $first ) { $sql .= ","; $sql2 .= ","; }
 911                                 $first = false;
 912                                 $sql .= "({$s->l_from},'{$t}')";
 913                                 $sql2 .= "{$s->l_from}";
 914                         }
 915                         $sql2 .= ")";
 916                         if ( ! $first ) {
 917                                 wfQuery( $sql, DB_WRITE, $fname );
 918                                 wfQuery( $sql2, DB_WRITE, $fname );
 919                         }
 920                         wfFreeResult( $res );
 921
 922                         $sql = "DELETE FROM links WHERE l_to={$id}";
 923                         wfQuery( $sql, DB_WRITE, $fname );
 924
 925                         $sql = "DELETE FROM links WHERE l_from={$id}";
 926                         wfQuery( $sql, DB_WRITE, $fname );
 927
 928                         $sql = "DELETE FROM imagelinks WHERE il_from={$d}";
 929                         wfQuery( $sql, DB_WRITE, $fname );
 930
 931                         $sql = "DELETE FROM brokenlinks WHERE bl_from={$id}";
 932                         wfQuery( $sql, DB_WRITE, $fname );
 933                 }
 934
 935                 $log = new LogPage( wfMsg( "dellogpage" ), wfMsg( "dellogpagetext" ) );
 936                 $art = $title->getPrefixedText();
 937                 $wpReason = $wgRequest->getText( "wpReason" );
 938                 $log->addEntry( wfMsg( "deletedarticle", $art ), $wpReason );
 939
 940                 # Clear the cached article id so the interface doesn't act like we exist
 941                 $this->mTitle->resetArticleID( 0 );
 942                 $this->mTitle->mArticleID = 0;
 943         }
 944
 945         function rollback()
 946         {
 947                 global $wgUser, $wgLang, $wgOut, $wgRequest;
 948
 949                 if ( ! $wgUser->isSysop() ) {
 950                         $wgOut->sysopRequired();
 951                         return;
 952                 }
 953                 if ( wfReadOnly() ) {
 954                         $wgOut->readOnlyPage( $this->getContent() );
 955                         return;
 956                 }
 957
 958                 # Enhanced rollback, marks edits rc_bot=1
 959                 $bot = $wgRequest->getBool( 'bot' );
 960
 961                 # Replace all this user's current edits with the next one down
 962                 $tt = wfStrencode( $this->mTitle->getDBKey() );
 963                 $n = $this->mTitle->getNamespace();
 964
 965                 # Get the last editor
 966                 $sql = "SELECT cur_id,cur_user,cur_user_text,cur_comment FROM cur WHERE cur_title='{$tt}' AND cur_namespace={$n}";
 967                 $res = wfQuery( $sql, DB_READ );
 968                 if( ($x = wfNumRows( $res )) != 1 ) {
 969                         # Something wrong
 970                         $wgOut->addHTML( wfMsg( "notanarticle" ) );
 971                         return;
 972                 }
 973                 $s = wfFetchObject( $res );
 974                 $ut = wfStrencode( $s->cur_user_text );
 975                 $uid = $s->cur_user;
 976                 $pid = $s->cur_id;
 977
 978                 $from = str_replace( '_', ' ', $wgRequest->getVal( "from" ) );
 979                 if( $from != $s->cur_user_text ) {
 980                         $wgOut->setPageTitle(wfmsg("rollbackfailed"));
 981                         $wgOut->addWikiText( wfMsg( "alreadyrolled",
 982                                 htmlspecialchars( $this->mTitle->getPrefixedText()),
 983                                 htmlspecialchars( $from ),
 984                                 htmlspecialchars( $s->cur_user_text ) ) );
 985                         if($s->cur_comment != "") {
 986                                 $wgOut->addHTML(
 987                                         wfMsg("editcomment",
 988                                         htmlspecialchars( $s->cur_comment ) ) );
 989                         }
 990                         return;
 991                 }
 992
 993                 # Get the last edit not by this guy
 994                 $sql = "SELECT old_text,old_user,old_user_text,old_timestamp,old_flags
 995                 FROM old USE INDEX (name_title_timestamp)
 996                 WHERE old_namespace={$n} AND old_title='{$tt}'
 997                 AND (old_user <> {$uid} OR old_user_text <> '{$ut}')
 998                 ORDER BY inverse_timestamp LIMIT 1";
 999                 $res = wfQuery( $sql, DB_READ );
1000                 if( wfNumRows( $res ) != 1 ) {
1001                         # Something wrong
1002                         $wgOut->setPageTitle(wfMsg("rollbackfailed"));
1003                         $wgOut->addHTML( wfMsg( "cantrollback" ) );
1004                         return;
1005                 }
1006                 $s = wfFetchObject( $res );
1007
1008                 if ( $bot ) {
1009                         # Mark all reverted edits as bot
1010                         $sql = "UPDATE recentchanges SET rc_bot=1 WHERE
1011                                 rc_cur_id=$pid AND rc_user=$uid AND rc_timestamp > '{$s->old_timestamp}'";
1012                         wfQuery( $sql, DB_WRITE, $fname );
1013                 }
1014
1015                 # Save it!
1016                 $newcomment = wfMsg( "revertpage", $s->old_user_text, $from );
1017                 $wgOut->setPagetitle( wfMsg( "actioncomplete" ) );
1018                 $wgOut->setRobotpolicy( "noindex,nofollow" );
1019                 $wgOut->addHTML( "<h2>" . $newcomment . "</h2>\n<hr>\n" );
1020                 $this->updateArticle( Article::getRevisionText( $s ), $newcomment, 1, $this->mTitle->userIsWatching(), $bot );
1021                 Article::onArticleEdit( $this->mTitle );
1022                 $wgOut->returnToMain( false );
1023         }
1024
1025
1026         # Do standard deferred updates after page view
1027
1028         /* private */ function viewUpdates()
1029         {
1030                 global $wgDeferredUpdateList;
1031                 if ( 0 != $this->getID() ) {
1032                         global $wgDisableCounters;
1033                         if( !$wgDisableCounters ) {
1034                                 Article::incViewCount( $this->getID() );
1035                                 $u = new SiteStatsUpdate( 1, 0, 0 );
1036                                 array_push( $wgDeferredUpdateList, $u );
1037                         }
1038                         $u = new UserTalkUpdate( 0, $this->mTitle->getNamespace(),
1039                           $this->mTitle->getDBkey() );
1040                         array_push( $wgDeferredUpdateList, $u );
1041                 }
1042         }
1043
1044         # Do standard deferred updates after page edit.
1045         # Every 1000th edit, prune the recent changes table.
1046
1047         /* private */ function editUpdates( $text )
1048         {
1049                 global $wgDeferredUpdateList, $wgDBname, $wgMemc;
1050                 global $wgMessageCache;
1051
1052                 wfSeedRandom();
1053                 if ( 0 == mt_rand( 0, 999 ) ) {
1054                         $cutoff = wfUnix2Timestamp( time() - ( 7 * 86400 ) );
1055                         $sql = "DELETE FROM recentchanges WHERE rc_timestamp < '{$cutoff}'";
1056                         wfQuery( $sql, DB_WRITE );
1057                 }
1058                 $id = $this->getID();
1059                 $title = $this->mTitle->getPrefixedDBkey();
1060                 $shortTitle = $this->mTitle->getDBkey();
1061
1062                 $adj = $this->mCountAdjustment;
1063
1064                 if ( 0 != $id ) {
1065                         $u = new LinksUpdate( $id, $title );
1066                         array_push( $wgDeferredUpdateList, $u );
1067                         $u = new SiteStatsUpdate( 0, 1, $adj );
1068                         array_push( $wgDeferredUpdateList, $u );
1069                         $u = new SearchUpdate( $id, $title, $text );
1070                         array_push( $wgDeferredUpdateList, $u );
1071
1072                         $u = new UserTalkUpdate( 1, $this->mTitle->getNamespace(), $shortTitle );
1073                         array_push( $wgDeferredUpdateList, $u );
1074
1075                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
1076                                 $wgMessageCache->replace( $shortTitle, $text );
1077                         }
1078                 }
1079         }
1080
1081         /* private */ function setOldSubtitle()
1082         {
1083                 global $wgLang, $wgOut;
1084
1085                 $td = $wgLang->timeanddate( $this->mTimestamp, true );
1086                 $r = wfMsg( "revisionasof", $td );
1087                 $wgOut->setSubtitle( "({$r})" );
1088         }
1089
1090         # This function is called right before saving the wikitext,
1091         # so we can do things like signatures and links-in-context.
1092
1093         function preSaveTransform( $text )
1094         {
1095                 global $wgParser, $wgUser;
1096                 return $wgParser->preSaveTransform( $text, $this->mTitle, $wgUser, ParserOptions::newFromUser( $wgUser ) );
1097         }
1098
1099         /* Caching functions */
1100
1101         # checkLastModified returns true iff it has taken care of all
1102         # output to the client that is necessary for this request.
1103         # (that is, it has sent a cached version of the page)
1104         function tryFileCache() {
1105                 static $called = false;
1106                 if( $called ) {
1107                         wfDebug( " tryFileCache() -- called twice!?\n" );
1108                         return;
1109                 }
1110                 $called = true;
1111                 if($this->isFileCacheable()) {
1112                         $touched = $this->mTouched;
1113                         if( $this->mTitle->getPrefixedDBkey() == wfMsg( "mainpage" ) ) {
1114                                 # Expire the main page quicker
1115                                 $expire = wfUnix2Timestamp( time() - 3600 );
1116                                 $touched = max( $expire, $touched );
1117                         }
1118                         $cache = new CacheManager( $this->mTitle );
1119                         if($cache->isFileCacheGood( $touched )) {
1120                                 global $wgOut;
1121                                 wfDebug( " tryFileCache() - about to load\n" );
1122                                 $cache->loadFromFileCache();
1123                                 return true;
1124                         } else {
1125                                 wfDebug( " tryFileCache() - starting buffer\n" );
1126                                 ob_start( array(&$cache, 'saveToFileCache' ) );
1127                         }
1128                 } else {
1129                         wfDebug( " tryFileCache() - not cacheable\n" );
1130                 }
1131         }
1132
1133         function isFileCacheable() {
1134                 global $wgUser, $wgUseFileCache, $wgShowIPinHeader;
1135                 global $action, $oldid, $diff, $redirect, $printable;
1136                 return $wgUseFileCache
1137                         and (!$wgShowIPinHeader)
1138                         and ($this->getID() != 0)
1139                         and ($wgUser->getId() == 0)
1140                         and (!$wgUser->getNewtalk())
1141                         and ($this->mTitle->getNamespace() != Namespace::getSpecial())
1142                         and ($action == "view")
1143                         and (!isset($oldid))
1144                         and (!isset($diff))
1145                         and (!isset($redirect))
1146                         and (!isset($printable))
1147                         and (!$this->mRedirectedFrom);
1148         }
1149
1150         function checkTouched() {
1151                 $id = $this->getID();
1152                 $sql = "SELECT cur_touched,cur_is_redirect FROM cur WHERE cur_id=$id";
1153                 $res = wfQuery( $sql, DB_READ, "Article::checkTouched" );
1154                 if( $s = wfFetchObject( $res ) ) {
1155                         $this->mTouched = $s->cur_touched;
1156                         return !$s->cur_is_redirect;
1157                 } else {
1158                         return false;
1159                 }
1160         }
1161
1162         /* static */ function incViewCount( $id )
1163         {
1164                 $id = intval( $id );
1165                 global $wgHitcounterUpdateFreq;
1166
1167                 if( $wgHitcounterUpdateFreq <= 1 ){ //
1168                         wfQuery("UPDATE cur SET cur_counter = cur_counter + 1 " .
1169                                 "WHERE cur_id = $id", DB_WRITE);
1170                         return;
1171                 }
1172
1173                 # Not important enough to warrant an error page in case of failure
1174                 $oldignore = wfIgnoreSQLErrors( true );
1175
1176                 wfQuery("INSERT INTO hitcounter (hc_id) VALUES ({$id})", DB_WRITE);
1177
1178                 $checkfreq = intval( $wgHitcounterUpdateFreq/25 + 1 );
1179                 if( (rand() % $checkfreq != 0) or (wfLastErrno() != 0) ){
1180                         # Most of the time (or on SQL errors), skip row count check
1181                         wfIgnoreSQLErrors( $oldignore );
1182                         return;
1183                 }
1184
1185                 $res = wfQuery("SELECT COUNT(*) as n FROM hitcounter", DB_WRITE);
1186                 $row = wfFetchObject( $res );
1187                 $rown = intval( $row->n );
1188                 if( $rown >= $wgHitcounterUpdateFreq ){
1189                         wfProfileIn( "Article::incViewCount-collect" );
1190                         $old_user_abort = ignore_user_abort( true );
1191
1192                         wfQuery("LOCK TABLES hitcounter WRITE", DB_WRITE);
1193                         wfQuery("CREATE TEMPORARY TABLE acchits TYPE=HEAP ".
1194                                 "SELECT hc_id,COUNT(*) AS hc_n FROM hitcounter ".
1195                                 "GROUP BY hc_id", DB_WRITE);
1196                         wfQuery("DELETE FROM hitcounter", DB_WRITE);
1197                         wfQuery("UNLOCK TABLES", DB_WRITE);
1198                         wfQuery("UPDATE cur,acchits SET cur_counter=cur_counter + hc_n ".
1199                                 "WHERE cur_id = hc_id", DB_WRITE);
1200                         wfQuery("DROP TABLE acchits", DB_WRITE);
1201
1202                         ignore_user_abort( $old_user_abort );
1203                         wfProfileOut( "Article::incViewCount-collect" );
1204                 }
1205                 wfIgnoreSQLErrors( $oldignore );
1206         }
1207
1208         # The onArticle*() functions are supposed to be a kind of hooks
1209         # which should be called whenever any of the specified actions
1210         # are done.
1211         #
1212         # This is a good place to put code to clear caches, for instance.
1213
1214         /* static */ function onArticleCreate($title_obj){
1215                 global $wgEnablePersistentLC, $wgEnableParserCache;
1216                 if ( $wgEnablePersistentLC ) {
1217                         LinkCache::linksccClearBrokenLinksTo( $title_obj->getPrefixedDBkey() );
1218                 }
1219                 if ( $wgEnableParserCache ) {
1220                         OutputPage::parsercacheClearBrokenLinksTo( $title_obj->getPrefixedDBkey() );
1221                 }
1222         }
1223
1224         /* static */ function onArticleDelete($title_obj){
1225                 global $wgEnablePersistentLC, $wgEnableParserCache;
1226                 if ( $wgEnablePersistentLC ) {
1227                         LinkCache::linksccClearLinksTo( $title_obj->getArticleID() );
1228                 }
1229                 if ( $wgEnableParserCache ) {
1230                         OutputPage::parsercacheClearLinksTo( $title_obj->getArticleID() );
1231                 }
1232         }
1233
1234         /* static */ function onArticleEdit($title_obj){
1235                 global $wgEnablePersistentLC, $wgEnableParserCache;
1236                 if ( $wgEnablePersistentLC ) {
1237                         LinkCache::linksccClearPage( $title_obj->getArticleID() );
1238                 }
1239                 if ( $wgEnableParserCache ) {
1240                         OutputPage::parsercacheClearPage( $title_obj->getArticleID(), $title_obj->getNamespace() );
1241                 }
1242         }
1243 }
1244
1245 function wfReplaceSubstVar( $matches ) {
1246         return wfMsg( $matches[1] );
1247 }
1248
1249 ?>