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                 # Add link titles as META keywords
 369                 $wgOut->addMetaTags() ;
 370
 371                 $this->viewUpdates();
 372                 wfProfileOut( $fname );
 373         }
 374
 375         # Theoretically we could defer these whole insert and update
 376         # functions for after display, but that's taking a big leap
 377         # of faith, and we want to be able to report database
 378         # errors at some point.
 379
 380         /* private */ function insertNewArticle( $text, $summary, $isminor, $watchthis )
 381         {
 382                 global $wgOut, $wgUser, $wgLinkCache, $wgMwRedir;
 383                 global $wgUseSquid, $wgDeferredUpdateList, $wgInternalServer;
 384
 385                 $fname = "Article::insertNewArticle";
 386
 387                 $this->mCountAdjustment = $this->isCountable( $text );
 388
 389                 $ns = $this->mTitle->getNamespace();
 390                 $ttl = $this->mTitle->getDBkey();
 391                 $text = $this->preSaveTransform( $text );
 392                 if ( $wgMwRedir->matchStart( $text ) ) { $redir = 1; }
 393                 else { $redir = 0; }
 394
 395                 $now = wfTimestampNow();
 396                 $won = wfInvertTimestamp( $now );
 397                 wfSeedRandom();
 398                 $rand = number_format( mt_rand() / mt_getrandmax(), 12, ".", "" );
 399                 $isminor = ( $isminor && $wgUser->getID() ) ? 1 : 0;
 400                 $sql = "INSERT INTO cur (cur_namespace,cur_title,cur_text," .
 401                   "cur_comment,cur_user,cur_timestamp,cur_minor_edit,cur_counter," .
 402                   "cur_restrictions,cur_user_text,cur_is_redirect," .
 403                   "cur_is_new,cur_random,cur_touched,inverse_timestamp) VALUES ({$ns},'" . wfStrencode( $ttl ) . "', '" .
 404                   wfStrencode( $text ) . "', '" .
 405                   wfStrencode( $summary ) . "', '" .
 406                   $wgUser->getID() . "', '{$now}', " .
 407                   $isminor . ", 0, '', '" .
 408                   wfStrencode( $wgUser->getName() ) . "', $redir, 1, $rand, '{$now}', '{$won}')";
 409                 $res = wfQuery( $sql, DB_WRITE, $fname );
 410
 411                 $newid = wfInsertId();
 412                 $this->mTitle->resetArticleID( $newid );
 413
 414                 Article::onArticleCreate( $this->mTitle );
 415                 RecentChange::notifyNew( $now, $this->mTitle, $isminor, $wgUser, $summary );
 416
 417                 if ($watchthis) {
 418                         if(!$this->mTitle->userIsWatching()) $this->watch();
 419                 } else {
 420                         if ( $this->mTitle->userIsWatching() ) {
 421                                 $this->unwatch();
 422                         }
 423                 }
 424
 425                 # The talk page isn't in the regular link tables, so we need to update manually:
 426                 $talkns = $ns ^ 1; # talk -> normal; normal -> talk
 427                 $sql = "UPDATE cur set cur_touched='$now' WHERE cur_namespace=$talkns AND cur_title='" . wfStrencode( $ttl ) . "'";
 428                 wfQuery( $sql, DB_WRITE );
 429
 430                 # standard deferred updates
 431                 $this->editUpdates( $text );
 432
 433                 $this->showArticle( $text, wfMsg( "newarticle" ) );
 434         }
 435
 436
 437         /* Side effects: loads last edit */
 438         function getTextOfLastEditWithSectionReplacedOrAdded($section, $text, $summary = ""){
 439                 $this->loadLastEdit();
 440                 $oldtext = $this->getContent();
 441                 if ($section != "") {
 442                         if($section=="new") {
 443                                 if($summary) $subject="== {$summary} ==\n\n";
 444                                 $text=$oldtext."\n\n".$subject.$text;
 445                         } else {
 446                                 $secs=preg_split("/(^=+.*?=+|^<h[1-6].*?>.*?<\/h[1-6].*?>)/mi",
 447                                   $oldtext,-1,PREG_SPLIT_DELIM_CAPTURE);
 448                                 $secs[$section*2]=$text."\n\n"; // replace with edited
 449                                 if($section) { $secs[$section*2-1]=""; } // erase old headline
 450                                 $text=join("",$secs);
 451                         }
 452                 }
 453                 return $text;
 454         }
 455
 456         function updateArticle( $text, $summary, $minor, $watchthis, $forceBot = false )
 457         {
 458                 global $wgOut, $wgUser, $wgLinkCache;
 459                 global $wgDBtransactions, $wgMwRedir;
 460                 global $wgUseSquid, $wgInternalServer;
 461                 $fname = "Article::updateArticle";
 462
 463                 if ( $this->mMinorEdit ) { $me1 = 1; } else { $me1 = 0; }
 464                 if ( $minor && $wgUser->getID() ) { $me2 = 1; } else { $me2 = 0; }
 465                 if ( preg_match( "/^((" . $wgMwRedir->getBaseRegex() . ")[^\\n]+)/i", $text, $m ) ) {
 466                         $redir = 1;
 467                         $text = $m[1] . "\n"; # Remove all content but redirect
 468                 }
 469                 else { $redir = 0; }
 470
 471                 $text = $this->preSaveTransform( $text );
 472
 473                 # Update article, but only if changed.
 474
 475                 if( $wgDBtransactions ) {
 476                         $sql = "BEGIN";
 477                         wfQuery( $sql, DB_WRITE );
 478                 }
 479                 $oldtext = $this->getContent( true );
 480
 481                 if ( 0 != strcmp( $text, $oldtext ) ) {
 482                         $this->mCountAdjustment = $this->isCountable( $text )
 483                           - $this->isCountable( $oldtext );
 484
 485                         $now = wfTimestampNow();
 486                         $won = wfInvertTimestamp( $now );
 487                         $sql = "UPDATE cur SET cur_text='" . wfStrencode( $text ) .
 488                           "',cur_comment='" .  wfStrencode( $summary ) .
 489                           "',cur_minor_edit={$me2}, cur_user=" . $wgUser->getID() .
 490                           ",cur_timestamp='{$now}',cur_user_text='" .
 491                           wfStrencode( $wgUser->getName() ) .
 492                           "',cur_is_redirect={$redir}, cur_is_new=0, cur_touched='{$now}', inverse_timestamp='{$won}' " .
 493                           "WHERE cur_id=" . $this->getID() .
 494                           " AND cur_timestamp='" . $this->getTimestamp() . "'";
 495                         $res = wfQuery( $sql, DB_WRITE, $fname );
 496
 497                         if( wfAffectedRows() == 0 ) {
 498                                 /* Belated edit conflict! Run away!! */
 499                                 return false;
 500                         }
 501
 502                         # This overwrites $oldtext if revision compression is on
 503                         $flags = Article::compressRevisionText( $oldtext );
 504
 505                         $sql = "INSERT INTO old (old_namespace,old_title,old_text," .
 506                           "old_comment,old_user,old_user_text,old_timestamp," .
 507                           "old_minor_edit,inverse_timestamp,old_flags) VALUES (" .
 508                           $this->mTitle->getNamespace() . ", '" .
 509                           wfStrencode( $this->mTitle->getDBkey() ) . "', '" .
 510                           wfStrencode( $oldtext ) . "', '" .
 511                           wfStrencode( $this->getComment() ) . "', " .
 512                           $this->getUser() . ", '" .
 513                           wfStrencode( $this->getUserText() ) . "', '" .
 514                           $this->getTimestamp() . "', " . $me1 . ", '" .
 515                           wfInvertTimestamp( $this->getTimestamp() ) . "','$flags')";
 516                         $res = wfQuery( $sql, DB_WRITE, $fname );
 517                         $oldid = wfInsertID( $res );
 518
 519                         $bot = (int)($wgUser->isBot() || $forceBot);
 520                         RecentChange::notifyEdit( $now, $this->mTitle, $me2, $wgUser, $summary,
 521                                 $oldid, $this->getTimestamp(), $bot );
 522                         Article::onArticleEdit( $this->mTitle );
 523                 }
 524
 525                 if( $wgDBtransactions ) {
 526                         $sql = "COMMIT";
 527                         wfQuery( $sql, DB_WRITE );
 528                 }
 529
 530                 if ($watchthis) {
 531                         if (!$this->mTitle->userIsWatching()) $this->watch();
 532                 } else {
 533                         if ( $this->mTitle->userIsWatching() ) {
 534                                 $this->unwatch();
 535                         }
 536                 }
 537                 # standard deferred updates
 538                 $this->editUpdates( $text );
 539
 540
 541                 $urls = array();
 542                 # Template namespace
 543                 # Purge all articles linking here
 544                 if ( $this->mTitle->getNamespace() == NS_TEMPLATE) {
 545                         $titles = $this->mTitle->getLinksTo();
 546                         Title::touchArray( $titles );
 547                         if ( $wgUseSquid ) {
 548                                 foreach ( $titles as $title ) {
 549                                         $urls[] = $title->getInternalURL();
 550                                 }
 551                         }
 552                 }
 553
 554                 # Squid updates
 555                 if ( $wgUseSquid ) {
 556                         $urls = array_merge( $urls, $this->mTitle->getSquidURLs() );
 557                         $u = new SquidUpdate( $urls );
 558                         $u->doUpdate();
 559                 }
 560
 561                 $this->showArticle( $text, wfMsg( "updated" ) );
 562                 return true;
 563         }
 564
 565         # After we've either updated or inserted the article, update
 566         # the link tables and redirect to the new page.
 567
 568         function showArticle( $text, $subtitle )
 569         {
 570                 global $wgOut, $wgUser, $wgLinkCache;
 571                 global $wgMwRedir;
 572
 573                 $wgLinkCache = new LinkCache();
 574
 575                 # Get old version of link table to allow incremental link updates
 576                 $wgLinkCache->preFill( $this->mTitle );
 577                 $wgLinkCache->clear();
 578
 579                 # Now update the link cache by parsing the text
 580                 $wgOut = new OutputPage();
 581                 $wgOut->addWikiText( $text );
 582
 583                 if( $wgMwRedir->matchStart( $text ) )
 584                         $r = "redirect=no";
 585                 else
 586                         $r = "";
 587                 $wgOut->redirect( $this->mTitle->getFullURL( $r ) );
 588         }
 589
 590         # Add this page to my watchlist
 591
 592         function watch( $add = true )
 593         {
 594                 global $wgUser, $wgOut, $wgLang;
 595                 global $wgDeferredUpdateList;
 596
 597                 if ( 0 == $wgUser->getID() ) {
 598                         $wgOut->errorpage( "watchnologin", "watchnologintext" );
 599                         return;
 600                 }
 601                 if ( wfReadOnly() ) {
 602                         $wgOut->readOnlyPage();
 603                         return;
 604                 }
 605                 if( $add )
 606                         $wgUser->addWatch( $this->mTitle );
 607                 else
 608                         $wgUser->removeWatch( $this->mTitle );
 609
 610                 $wgOut->setPagetitle( wfMsg( $add ? "addedwatch" : "removedwatch" ) );
 611                 $wgOut->setRobotpolicy( "noindex,follow" );
 612
 613                 $sk = $wgUser->getSkin() ;
 614                 $link = $sk->makeKnownLink ( $this->mTitle->getPrefixedText() ) ;
 615
 616                 if($add)
 617                         $text = wfMsg( "addedwatchtext", $link );
 618                 else
 619                         $text = wfMsg( "removedwatchtext", $link );
 620                 $wgOut->addHTML( $text );
 621
 622                 $up = new UserUpdate();
 623                 array_push( $wgDeferredUpdateList, $up );
 624
 625                 $wgOut->returnToMain( false );
 626         }
 627
 628         function unwatch()
 629         {
 630                 $this->watch( false );
 631         }
 632
 633         function protect( $limit = "sysop" )
 634         {
 635                 global $wgUser, $wgOut;
 636
 637                 if ( ! $wgUser->isSysop() ) {
 638                         $wgOut->sysopRequired();
 639                         return;
 640                 }
 641                 if ( wfReadOnly() ) {
 642                         $wgOut->readOnlyPage();
 643                         return;
 644                 }
 645                 $id = $this->mTitle->getArticleID();
 646                 if ( 0 == $id ) {
 647                         $wgOut->fatalEror( wfMsg( "badarticleerror" ) );
 648                         return;
 649                 }
 650         $sql = "UPDATE cur SET cur_touched='" . wfTimestampNow() . "'," .
 651                         "cur_restrictions='{$limit}' WHERE cur_id={$id}";
 652                 wfQuery( $sql, DB_WRITE, "Article::protect" );
 653
 654                 $log = new LogPage( wfMsg( "protectlogpage" ), wfMsg( "protectlogtext" ) );
 655                 if ( $limit === "" ) {
 656                         $log->addEntry( wfMsg( "unprotectedarticle", $this->mTitle->getPrefixedText() ), "" );
 657                 } else {
 658                         $log->addEntry( wfMsg( "protectedarticle", $this->mTitle->getPrefixedText() ), "" );
 659                 }
 660                 $wgOut->redirect( $this->mTitle->getFullURL() );
 661         }
 662
 663         function unprotect()
 664         {
 665                 return $this->protect( "" );
 666         }
 667
 668         function delete()
 669         {
 670                 global $wgUser, $wgOut, $wgMessageCache;
 671                 global $wpConfirm, $wpReason, $image, $oldimage;
 672                 $fname = "Article::delete";
 673
 674                 # This code desperately needs to be totally rewritten
 675
 676                 if ( ( ! $wgUser->isSysop() ) ) {
 677                         $wgOut->sysopRequired();
 678                         return;
 679                 }
 680                 if ( wfReadOnly() ) {
 681                         $wgOut->readOnlyPage();
 682                         return;
 683                 }
 684
 685                 # Can't delete MediaWiki namespace
 686                 if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
 687                         $wgOut->fatalError( wfMsg( "cannotdelete" ) );
 688                         return;
 689                 }
 690
 691                 # Better double-check that it hasn't been deleted yet!
 692                 $wgOut->setPagetitle( wfMsg( "confirmdelete" ) );
 693                 if ( ( "" == trim( $this->mTitle->getText() ) )
 694                   or ( $this->mTitle->getArticleId() == 0 ) ) {
 695                         $wgOut->fatalError( wfMsg( "cannotdelete" ) );
 696                         return;
 697                 }
 698
 699                 if ( @$_POST["wpConfirm"] ) {
 700                         $this->doDelete();
 701                         return;
 702                 }
 703
 704                 # determine whether this page has earlier revisions
 705                 # and insert a warning if it does
 706                 # we select the text because it might be useful below
 707                 $ns = $this->mTitle->getNamespace();
 708                 $title = $this->mTitle->getDBkey();
 709                 $etitle = wfStrencode( $title );
 710                 $sql = "SELECT old_text,old_flags FROM old WHERE old_namespace=$ns and old_title='$etitle' ORDER BY inverse_timestamp LIMIT 1";
 711                 $res = wfQuery( $sql, DB_READ, $fname );
 712                 if( ($old=wfFetchObject($res)) && !$wpConfirm ) {
 713                         $skin=$wgUser->getSkin();
 714                         $wgOut->addHTML("<B>".wfMsg("historywarning"));
 715                         $wgOut->addHTML( $skin->historyLink() ."</B><P>");
 716                 }
 717
 718                 $sql="SELECT cur_text FROM cur WHERE cur_namespace=$ns and cur_title='$etitle'";
 719                 $res=wfQuery($sql, DB_READ, $fname);
 720                 if( ($s=wfFetchObject($res))) {
 721
 722                         # if this is a mini-text, we can paste part of it into the deletion reason
 723
 724                         #if this is empty, an earlier revision may contain "useful" text
 725                         $blanked = false;
 726                         if($s->cur_text!="") {
 727                                 $text=$s->cur_text;
 728                         } else {
 729                                 if($old) {
 730                                         $text = Article::getRevisionText( $old );
 731                                         $blanked = true;
 732                                 }
 733
 734                         }
 735
 736                         $length=strlen($text);
 737
 738                         # this should not happen, since it is not possible to store an empty, new
 739                         # page. Let's insert a standard text in case it does, though
 740                         if($length==0 && !$wpReason) { $wpReason=wfmsg("exblank");}
 741
 742
 743                         if($length < 500 && !$wpReason) {
 744
 745                                 # comment field=255, let's grep the first 150 to have some user
 746                                 # space left
 747                                 $text=substr($text,0,150);
 748                                 # let's strip out newlines and HTML tags
 749                                 $text=preg_replace("/\"/","'",$text);
 750                                 $text=preg_replace("/\</","&lt;",$text);
 751                                 $text=preg_replace("/\>/","&gt;",$text);
 752                                 $text=preg_replace("/[\n\r]/","",$text);
 753                                 if(!$blanked) {
 754                                         $wpReason=wfMsg("excontent"). " '".$text;
 755                                 } else {
 756                                         $wpReason=wfMsg("exbeforeblank") . " '".$text;
 757                                 }
 758                                 if($length>150) { $wpReason .= "..."; } # we've only pasted part of the text
 759                                 $wpReason.="'";
 760                         }
 761                 }
 762
 763                 return $this->confirmDelete();
 764         }
 765
 766         function confirmDelete( $par = "" )
 767         {
 768                 global $wgOut;
 769                 global $wpReason;
 770
 771                 wfDebug( "Article::confirmDelete\n" );
 772
 773                 $sub = htmlspecialchars( $this->mTitle->getPrefixedText() );
 774                 $wgOut->setSubtitle( wfMsg( "deletesub", $sub ) );
 775                 $wgOut->setRobotpolicy( "noindex,nofollow" );
 776                 $wgOut->addWikiText( wfMsg( "confirmdeletetext" ) );
 777
 778                 $formaction = $this->mTitle->escapeLocalURL( "action=delete" . $par );
 779
 780                 $confirm = wfMsg( "confirm" );
 781                 $check = wfMsg( "confirmcheck" );
 782                 $delcom = wfMsg( "deletecomment" );
 783
 784                 $wgOut->addHTML( "
 785 <form id=\"deleteconfirm\" method=\"post\" action=\"{$formaction}\">
 786 <table border=0><tr><td align=right>
 787 {$delcom}:</td><td align=left>
 788 <input type=text size=60 name=\"wpReason\" value=\"" . htmlspecialchars( $wpReason ) . "\">
 789 </td></tr><tr><td>&nbsp;</td></tr>
 790 <tr><td align=right>
 791 <input type=checkbox name=\"wpConfirm\" value='1' id=\"wpConfirm\">
 792 </td><td><label for=\"wpConfirm\">{$check}</label></td>
 793 </tr><tr><td>&nbsp;</td><td>
 794 <input type=submit name=\"wpConfirmB\" value=\"{$confirm}\">
 795 </td></tr></table></form>\n" );
 796
 797                 $wgOut->returnToMain( false );
 798         }
 799
 800         function doDelete()
 801         {
 802                 global $wgOut, $wgUser, $wgLang;
 803                 global $wpReason;
 804                 $fname = "Article::doDelete";
 805                 wfDebug( "$fname\n" );
 806
 807                 if ( $this->doDeleteArticle() ) {
 808                         $deleted = $this->mTitle->getPrefixedText();
 809
 810                         $wgOut->setPagetitle( wfMsg( "actioncomplete" ) );
 811                         $wgOut->setRobotpolicy( "noindex,nofollow" );
 812
 813                         $sk = $wgUser->getSkin();
 814                         $loglink = $sk->makeKnownLink( $wgLang->getNsText(
 815                           Namespace::getWikipedia() ) .
 816                           ":" . wfMsg( "dellogpage" ), wfMsg( "deletionlog" ) );
 817
 818                         $text = wfMsg( "deletedtext", $deleted, $loglink );
 819
 820                         $wgOut->addHTML( "<p>" . $text );
 821                         $wgOut->returnToMain( false );
 822                 } else {
 823                         $wgOut->fatalError( wfMsg( "cannotdelete" ) );
 824                 }
 825         }
 826
 827         # Delete the article, returns success
 828         function doDeleteArticle()
 829         {
 830                 global $wgUser, $wgLang, $wgRequest;
 831                 global  $wgUseSquid, $wgDeferredUpdateList, $wgInternalServer;
 832
 833                 $fname = "Article::doDeleteArticle";
 834                 wfDebug( "$fname\n" );
 835
 836                 $ns = $this->mTitle->getNamespace();
 837                 $t = wfStrencode( $this->mTitle->getDBkey() );
 838                 $id = $this->mTitle->getArticleID();
 839
 840                 if ( "" == $t || $id == 0 ) {
 841                         return false;
 842                 }
 843
 844                 $u = new SiteStatsUpdate( 0, 1, -$this->isCountable( $this->getContent( true ) ) );
 845                 array_push( $wgDeferredUpdateList, $u );
 846
 847                 $linksTo = $this->mTitle->getLinksTo();
 848
 849                 # Squid purging
 850                 if ( $wgUseSquid ) {
 851                         $urls = array(
 852                                 $this->mTitle->getInternalURL(),
 853                                 $this->mTitle->getInternalURL( "history" )
 854                         );
 855                         foreach ( $linksTo as $linkTo ) {
 856                                 $urls[] = $linkTo->getInternalURL();
 857                         }
 858
 859                         $u = new SquidUpdate( $urls );
 860                         array_push( $wgDeferredUpdateList, $u );
 861
 862                 }
 863
 864                 # Client and file cache invalidation
 865                 Title::touchArray( $linksTo );
 866
 867                 # Move article and history to the "archive" table
 868                 $sql = "INSERT INTO archive (ar_namespace,ar_title,ar_text," .
 869                   "ar_comment,ar_user,ar_user_text,ar_timestamp,ar_minor_edit," .
 870                   "ar_flags) SELECT cur_namespace,cur_title,cur_text,cur_comment," .
 871                   "cur_user,cur_user_text,cur_timestamp,cur_minor_edit,0 FROM cur " .
 872                   "WHERE cur_namespace={$ns} AND cur_title='{$t}'";
 873                 wfQuery( $sql, DB_WRITE, $fname );
 874
 875                 $sql = "INSERT INTO archive (ar_namespace,ar_title,ar_text," .
 876                   "ar_comment,ar_user,ar_user_text,ar_timestamp,ar_minor_edit," .
 877                   "ar_flags) SELECT old_namespace,old_title,old_text,old_comment," .
 878                   "old_user,old_user_text,old_timestamp,old_minor_edit,old_flags " .
 879                   "FROM old WHERE old_namespace={$ns} AND old_title='{$t}'";
 880                 wfQuery( $sql, DB_WRITE, $fname );
 881
 882                 # Now that it's safely backed up, delete it
 883
 884                 $sql = "DELETE FROM cur WHERE cur_namespace={$ns} AND " .
 885                   "cur_title='{$t}'";
 886                 wfQuery( $sql, DB_WRITE, $fname );
 887
 888                 $sql = "DELETE FROM old WHERE old_namespace={$ns} AND " .
 889                   "old_title='{$t}'";
 890                 wfQuery( $sql, DB_WRITE, $fname );
 891
 892                 $sql = "DELETE FROM recentchanges WHERE rc_namespace={$ns} AND " .
 893                   "rc_title='{$t}'";
 894                 wfQuery( $sql, DB_WRITE, $fname );
 895
 896                 # Finally, clean up the link tables
 897                 $t = wfStrencode( $this->mTitle->getPrefixedDBkey() );
 898
 899                 Article::onArticleDelete( $this->mTitle );
 900
 901                 $sql = "INSERT INTO brokenlinks (bl_from,bl_to) VALUES ";
 902                 $first = true;
 903
 904                 foreach ( $linksTo as $titleObj ) {
 905                         if ( ! $first ) { $sql .= ","; }
 906                         $first = false;
 907                         # Get article ID. Efficient because it was loaded into the cache by getLinksTo().
 908                         $linkID = $titleObj->getArticleID();
 909                         $sql .= "({$linkID},'{$t}')";
 910                 }
 911                 if ( ! $first ) {
 912                         wfQuery( $sql, DB_WRITE, $fname );
 913                 }
 914
 915                 $sql = "DELETE FROM links WHERE l_to={$id}";
 916                 wfQuery( $sql, DB_WRITE, $fname );
 917
 918                 $sql = "DELETE FROM links WHERE l_from={$id}";
 919                 wfQuery( $sql, DB_WRITE, $fname );
 920
 921                 $sql = "DELETE FROM imagelinks WHERE il_from={$id}";
 922                 wfQuery( $sql, DB_WRITE, $fname );
 923
 924                 $sql = "DELETE FROM brokenlinks WHERE bl_from={$id}";
 925                 wfQuery( $sql, DB_WRITE, $fname );
 926
 927                 $log = new LogPage( wfMsg( "dellogpage" ), wfMsg( "dellogpagetext" ) );
 928                 $art = $this->mTitle->getPrefixedText();
 929                 $wpReason = $wgRequest->getText( "wpReason" );
 930                 $log->addEntry( wfMsg( "deletedarticle", $art ), $wpReason );
 931
 932                 # Clear the cached article id so the interface doesn't act like we exist
 933                 $this->mTitle->resetArticleID( 0 );
 934                 $this->mTitle->mArticleID = 0;
 935                 return true;
 936         }
 937
 938         function rollback()
 939         {
 940                 global $wgUser, $wgLang, $wgOut, $wgRequest;
 941
 942                 if ( ! $wgUser->isSysop() ) {
 943                         $wgOut->sysopRequired();
 944                         return;
 945                 }
 946                 if ( wfReadOnly() ) {
 947                         $wgOut->readOnlyPage( $this->getContent() );
 948                         return;
 949                 }
 950
 951                 # Enhanced rollback, marks edits rc_bot=1
 952                 $bot = $wgRequest->getBool( 'bot' );
 953
 954                 # Replace all this user's current edits with the next one down
 955                 $tt = wfStrencode( $this->mTitle->getDBKey() );
 956                 $n = $this->mTitle->getNamespace();
 957
 958                 # Get the last editor
 959                 $sql = "SELECT cur_id,cur_user,cur_user_text,cur_comment FROM cur WHERE cur_title='{$tt}' AND cur_namespace={$n}";
 960                 $res = wfQuery( $sql, DB_READ );
 961                 if( ($x = wfNumRows( $res )) != 1 ) {
 962                         # Something wrong
 963                         $wgOut->addHTML( wfMsg( "notanarticle" ) );
 964                         return;
 965                 }
 966                 $s = wfFetchObject( $res );
 967                 $ut = wfStrencode( $s->cur_user_text );
 968                 $uid = $s->cur_user;
 969                 $pid = $s->cur_id;
 970
 971                 $from = str_replace( '_', ' ', $wgRequest->getVal( "from" ) );
 972                 if( $from != $s->cur_user_text ) {
 973                         $wgOut->setPageTitle(wfmsg("rollbackfailed"));
 974                         $wgOut->addWikiText( wfMsg( "alreadyrolled",
 975                                 htmlspecialchars( $this->mTitle->getPrefixedText()),
 976                                 htmlspecialchars( $from ),
 977                                 htmlspecialchars( $s->cur_user_text ) ) );
 978                         if($s->cur_comment != "") {
 979                                 $wgOut->addHTML(
 980                                         wfMsg("editcomment",
 981                                         htmlspecialchars( $s->cur_comment ) ) );
 982                         }
 983                         return;
 984                 }
 985
 986                 # Get the last edit not by this guy
 987                 $sql = "SELECT old_text,old_user,old_user_text,old_timestamp,old_flags
 988                 FROM old USE INDEX (name_title_timestamp)
 989                 WHERE old_namespace={$n} AND old_title='{$tt}'
 990                 AND (old_user <> {$uid} OR old_user_text <> '{$ut}')
 991                 ORDER BY inverse_timestamp LIMIT 1";
 992                 $res = wfQuery( $sql, DB_READ );
 993                 if( wfNumRows( $res ) != 1 ) {
 994                         # Something wrong
 995                         $wgOut->setPageTitle(wfMsg("rollbackfailed"));
 996                         $wgOut->addHTML( wfMsg( "cantrollback" ) );
 997                         return;
 998                 }
 999                 $s = wfFetchObject( $res );
1000
1001                 if ( $bot ) {
1002                         # Mark all reverted edits as bot
1003                         $sql = "UPDATE recentchanges SET rc_bot=1 WHERE
1004                                 rc_cur_id=$pid AND rc_user=$uid AND rc_timestamp > '{$s->old_timestamp}'";
1005                         wfQuery( $sql, DB_WRITE, $fname );
1006                 }
1007
1008                 # Save it!
1009                 $newcomment = wfMsg( "revertpage", $s->old_user_text, $from );
1010                 $wgOut->setPagetitle( wfMsg( "actioncomplete" ) );
1011                 $wgOut->setRobotpolicy( "noindex,nofollow" );
1012                 $wgOut->addHTML( "<h2>" . $newcomment . "</h2>\n<hr>\n" );
1013                 $this->updateArticle( Article::getRevisionText( $s ), $newcomment, 1, $this->mTitle->userIsWatching(), $bot );
1014                 Article::onArticleEdit( $this->mTitle );
1015                 $wgOut->returnToMain( false );
1016         }
1017
1018
1019         # Do standard deferred updates after page view
1020
1021         /* private */ function viewUpdates()
1022         {
1023                 global $wgDeferredUpdateList;
1024                 if ( 0 != $this->getID() ) {
1025                         global $wgDisableCounters;
1026                         if( !$wgDisableCounters ) {
1027                                 Article::incViewCount( $this->getID() );
1028                                 $u = new SiteStatsUpdate( 1, 0, 0 );
1029                                 array_push( $wgDeferredUpdateList, $u );
1030                         }
1031                         $u = new UserTalkUpdate( 0, $this->mTitle->getNamespace(),
1032                           $this->mTitle->getDBkey() );
1033                         array_push( $wgDeferredUpdateList, $u );
1034                 }
1035         }
1036
1037         # Do standard deferred updates after page edit.
1038         # Every 1000th edit, prune the recent changes table.
1039
1040         /* private */ function editUpdates( $text )
1041         {
1042                 global $wgDeferredUpdateList, $wgDBname, $wgMemc;
1043                 global $wgMessageCache;
1044
1045                 wfSeedRandom();
1046                 if ( 0 == mt_rand( 0, 999 ) ) {
1047                         $cutoff = wfUnix2Timestamp( time() - ( 7 * 86400 ) );
1048                         $sql = "DELETE FROM recentchanges WHERE rc_timestamp < '{$cutoff}'";
1049                         wfQuery( $sql, DB_WRITE );
1050                 }
1051                 $id = $this->getID();
1052                 $title = $this->mTitle->getPrefixedDBkey();
1053                 $shortTitle = $this->mTitle->getDBkey();
1054
1055                 $adj = $this->mCountAdjustment;
1056
1057                 if ( 0 != $id ) {
1058                         $u = new LinksUpdate( $id, $title );
1059                         array_push( $wgDeferredUpdateList, $u );
1060                         $u = new SiteStatsUpdate( 0, 1, $adj );
1061                         array_push( $wgDeferredUpdateList, $u );
1062                         $u = new SearchUpdate( $id, $title, $text );
1063                         array_push( $wgDeferredUpdateList, $u );
1064
1065                         $u = new UserTalkUpdate( 1, $this->mTitle->getNamespace(), $shortTitle );
1066                         array_push( $wgDeferredUpdateList, $u );
1067
1068                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
1069                                 $wgMessageCache->replace( $shortTitle, $text );
1070                         }
1071                 }
1072         }
1073
1074         /* private */ function setOldSubtitle()
1075         {
1076                 global $wgLang, $wgOut;
1077
1078                 $td = $wgLang->timeanddate( $this->mTimestamp, true );
1079                 $r = wfMsg( "revisionasof", $td );
1080                 $wgOut->setSubtitle( "({$r})" );
1081         }
1082
1083         # This function is called right before saving the wikitext,
1084         # so we can do things like signatures and links-in-context.
1085
1086         function preSaveTransform( $text )
1087         {
1088                 global $wgParser, $wgUser;
1089                 return $wgParser->preSaveTransform( $text, $this->mTitle, $wgUser, ParserOptions::newFromUser( $wgUser ) );
1090         }
1091
1092         /* Caching functions */
1093
1094         # checkLastModified returns true if it has taken care of all
1095         # output to the client that is necessary for this request.
1096         # (that is, it has sent a cached version of the page)
1097         function tryFileCache() {
1098                 static $called = false;
1099                 if( $called ) {
1100                         wfDebug( " tryFileCache() -- called twice!?\n" );
1101                         return;
1102                 }
1103                 $called = true;
1104                 if($this->isFileCacheable()) {
1105                         $touched = $this->mTouched;
1106                         if( $this->mTitle->getPrefixedDBkey() == wfMsg( "mainpage" ) ) {
1107                                 # Expire the main page quicker
1108                                 $expire = wfUnix2Timestamp( time() - 3600 );
1109                                 $touched = max( $expire, $touched );
1110                         }
1111                         $cache = new CacheManager( $this->mTitle );
1112                         if($cache->isFileCacheGood( $touched )) {
1113                                 global $wgOut;
1114                                 wfDebug( " tryFileCache() - about to load\n" );
1115                                 $cache->loadFromFileCache();
1116                                 return true;
1117                         } else {
1118                                 wfDebug( " tryFileCache() - starting buffer\n" );
1119                                 ob_start( array(&$cache, 'saveToFileCache' ) );
1120                         }
1121                 } else {
1122                         wfDebug( " tryFileCache() - not cacheable\n" );
1123                 }
1124         }
1125
1126         function isFileCacheable() {
1127                 global $wgUser, $wgUseFileCache, $wgShowIPinHeader;
1128                 global $action, $oldid, $diff, $redirect, $printable;
1129                 return $wgUseFileCache
1130                         and (!$wgShowIPinHeader)
1131                         and ($this->getID() != 0)
1132                         and ($wgUser->getId() == 0)
1133                         and (!$wgUser->getNewtalk())
1134                         and ($this->mTitle->getNamespace() != Namespace::getSpecial())
1135                         and ($action == "view")
1136                         and (!isset($oldid))
1137                         and (!isset($diff))
1138                         and (!isset($redirect))
1139                         and (!isset($printable))
1140                         and (!$this->mRedirectedFrom);
1141         }
1142
1143         function checkTouched() {
1144                 $id = $this->getID();
1145                 $sql = "SELECT cur_touched,cur_is_redirect FROM cur WHERE cur_id=$id";
1146                 $res = wfQuery( $sql, DB_READ, "Article::checkTouched" );
1147                 if( $s = wfFetchObject( $res ) ) {
1148                         $this->mTouched = $s->cur_touched;
1149                         return !$s->cur_is_redirect;
1150                 } else {
1151                         return false;
1152                 }
1153         }
1154
1155         /* static */ function incViewCount( $id )
1156         {
1157                 $id = intval( $id );
1158                 global $wgHitcounterUpdateFreq;
1159
1160                 if( $wgHitcounterUpdateFreq <= 1 ){ //
1161                         wfQuery("UPDATE cur SET cur_counter = cur_counter + 1 " .
1162                                 "WHERE cur_id = $id", DB_WRITE);
1163                         return;
1164                 }
1165
1166                 # Not important enough to warrant an error page in case of failure
1167                 $oldignore = wfIgnoreSQLErrors( true );
1168
1169                 wfQuery("INSERT INTO hitcounter (hc_id) VALUES ({$id})", DB_WRITE);
1170
1171                 $checkfreq = intval( $wgHitcounterUpdateFreq/25 + 1 );
1172                 if( (rand() % $checkfreq != 0) or (wfLastErrno() != 0) ){
1173                         # Most of the time (or on SQL errors), skip row count check
1174                         wfIgnoreSQLErrors( $oldignore );
1175                         return;
1176                 }
1177
1178                 $res = wfQuery("SELECT COUNT(*) as n FROM hitcounter", DB_WRITE);
1179                 $row = wfFetchObject( $res );
1180                 $rown = intval( $row->n );
1181                 if( $rown >= $wgHitcounterUpdateFreq ){
1182                         wfProfileIn( "Article::incViewCount-collect" );
1183                         $old_user_abort = ignore_user_abort( true );
1184
1185                         wfQuery("LOCK TABLES hitcounter WRITE", DB_WRITE);
1186                         wfQuery("CREATE TEMPORARY TABLE acchits TYPE=HEAP ".
1187                                 "SELECT hc_id,COUNT(*) AS hc_n FROM hitcounter ".
1188                                 "GROUP BY hc_id", DB_WRITE);
1189                         wfQuery("DELETE FROM hitcounter", DB_WRITE);
1190                         wfQuery("UNLOCK TABLES", DB_WRITE);
1191                         wfQuery("UPDATE cur,acchits SET cur_counter=cur_counter + hc_n ".
1192                                 "WHERE cur_id = hc_id", DB_WRITE);
1193                         wfQuery("DROP TABLE acchits", DB_WRITE);
1194
1195                         ignore_user_abort( $old_user_abort );
1196                         wfProfileOut( "Article::incViewCount-collect" );
1197                 }
1198                 wfIgnoreSQLErrors( $oldignore );
1199         }
1200
1201         # The onArticle*() functions are supposed to be a kind of hooks
1202         # which should be called whenever any of the specified actions
1203         # are done.
1204         #
1205         # This is a good place to put code to clear caches, for instance.
1206
1207         # This is called on page move and undelete, as well as edit
1208         /* static */ function onArticleCreate($title_obj){
1209                 global $wgEnablePersistentLC, $wgEnableParserCache, $wgUseSquid, $wgDeferredUpdateList;
1210
1211                 $titles = $title_obj->getBrokenLinksTo();
1212
1213                 # Purge squid
1214                 if ( $wgUseSquid ) {
1215                         $urls = $title_obj->getSquidURLs();
1216                         foreach ( $titles as $linkTitle ) {
1217                                 $urls[] = $linkTitle->getInternalURL();
1218                         }
1219                         $u = new SquidUpdate( $urls );
1220                         array_push( $wgDeferredUpdateList, $u );
1221                 }
1222
1223                 # Clear persistent link cache
1224                 if ( $wgEnablePersistentLC ) {
1225                         LinkCache::linksccClearBrokenLinksTo( $title_obj->getPrefixedDBkey() );
1226                 }
1227
1228                 # Clear parser cache (not really used)
1229                 if ( $wgEnableParserCache ) {
1230                         OutputPage::parsercacheClearBrokenLinksTo( $title_obj->getPrefixedDBkey() );
1231                 }
1232         }
1233
1234         /* static */ function onArticleDelete($title_obj){
1235                 global $wgEnablePersistentLC, $wgEnableParserCache;
1236                 if ( $wgEnablePersistentLC ) {
1237                         LinkCache::linksccClearLinksTo( $title_obj->getArticleID() );
1238                 }
1239                 if ( $wgEnableParserCache ) {
1240                         OutputPage::parsercacheClearLinksTo( $title_obj->getArticleID() );
1241                 }
1242         }
1243
1244         /* static */ function onArticleEdit($title_obj){
1245                 global $wgEnablePersistentLC, $wgEnableParserCache;
1246                 if ( $wgEnablePersistentLC ) {
1247                         LinkCache::linksccClearPage( $title_obj->getArticleID() );
1248                 }
1249                 if ( $wgEnableParserCache ) {
1250                         OutputPage::parsercacheClearPage( $title_obj->getArticleID(), $title_obj->getNamespace() );
1251                 }
1252         }
1253 }
1254
1255 ?>