includes/Article.php

   1 <?php
   2 # Class representing a Wikipedia article and history.
   3 # See design.doc for an overview.
   4
   5 # Note: edit user interface and cache support functions have been
   6 # moved to separate EditPage and CacheManager classes.
   7
   8 include_once( "CacheManager.php" );
   9
  10 class Article {
  11         /* private */ var $mContent, $mContentLoaded;
  12         /* private */ var $mUser, $mTimestamp, $mUserText;
  13         /* private */ var $mCounter, $mComment, $mCountAdjustment;
  14         /* private */ var $mMinorEdit, $mRedirectedFrom;
  15         /* private */ var $mTouched, $mFileCache, $mTitle;
  16         /* private */ var $mId, $mTable;
  17
  18         function Article( &$title ) {
  19                 $this->mTitle =& $title;
  20                 $this->clear();
  21         }
  22
  23         /* private */ function clear()
  24         {
  25                 $this->mContentLoaded = false;
  26                 $this->mCurID = $this->mUser = $this->mCounter = -1; # Not loaded
  27                 $this->mRedirectedFrom = $this->mUserText =
  28                 $this->mTimestamp = $this->mComment = $this->mFileCache = "";
  29                 $this->mCountAdjustment = 0;
  30                 $this->mTouched = "19700101000000";
  31         }
  32
  33         /* static */ function getRevisionText( $row, $prefix = "old_" ) {
  34                 # Deal with optional compression of archived pages.
  35                 # This can be done periodically via maintenance/compressOld.php, and
  36                 # as pages are saved if $wgCompressRevisions is set.
  37                 $text = $prefix . "text";
  38                 $flags = $prefix . "flags";
  39                 if( isset( $row->$flags ) && (false !== strpos( $row->$flags, "gzip" ) ) ) {
  40                         return gzinflate( $row->$text );
  41                 }
  42                 if( isset( $row->$text ) ) {
  43                         return $row->$text;
  44                 }
  45                 return false;
  46         }
  47
  48         /* static */ function compressRevisionText( &$text ) {
  49                 global $wgCompressRevisions;
  50                 if( !$wgCompressRevisions ) {
  51                         return "";
  52                 }
  53                 if( !function_exists( "gzdeflate" ) ) {
  54                         wfDebug( "Article::compressRevisionText() -- no zlib support, not compressing\n" );
  55                         return "";
  56                 }
  57                 $text = gzdeflate( $text );
  58                 return "gzip";
  59         }
  60
  61         # Note that getContent/loadContent may follow redirects if
  62         # not told otherwise, and so may cause a change to mTitle.
  63
  64         # Return the text of this revision
  65         function getContent( $noredir = false )
  66         {
  67                 global $action,$section,$count; # From query string
  68                 $fname =  "Article::getContent";
  69                 wfProfileIn( $fname );
  70
  71                 if ( 0 == $this->getID() ) {
  72                         if ( "edit" == $action ) {
  73                                 wfProfileOut( $fname );
  74                                 return ""; # was "newarticletext", now moved above the box)
  75                         }
  76                         wfProfileOut( $fname );
  77                         return wfMsg( "noarticletext" );
  78                 } else {
  79                         $this->loadContent( $noredir );
  80
  81                         if(
  82                                 # check if we're displaying a [[User talk:x.x.x.x]] anonymous talk page
  83                                 ( $this->mTitle->getNamespace() == Namespace::getTalk( Namespace::getUser()) ) &&
  84                                   preg_match("/^\d{1,3}\.\d{1,3}.\d{1,3}\.\d{1,3}$/",$this->mTitle->getText()) &&
  85                                   $action=="view"
  86                                 )
  87                                 {
  88                                 wfProfileOut( $fname );
  89                                 return $this->mContent . "\n" .wfMsg("anontalkpagetext"); }
  90                         else {
  91                                 if($action=="edit") {
  92                                         if($section!="") {
  93                                                 if($section=="new") {
  94                                                         wfProfileOut( $fname );
  95                                                         return "";
  96                                                 }
  97
  98                                                 $secs=preg_split("/(^=+.*?=+|^<h[1-6].*?>.*?<\/h[1-6].*?>)/mi",
  99                                                  $this->mContent, -1,
 100                                                  PREG_SPLIT_DELIM_CAPTURE);
 101                                                 if($section==0) {
 102                                                         wfProfileOut( $fname );
 103                                                         return trim($secs[0]);
 104                                                 } else {
 105                                                         wfProfileOut( $fname );
 106                                                         return trim($secs[$section*2-1] . $secs[$section*2]);
 107                                                 }
 108                                         }
 109                                 }
 110                                 wfProfileOut( $fname );
 111                                 return $this->mContent;
 112                         }
 113                 }
 114         }
 115
 116         # Load the revision (including cur_text) into this object
 117         function loadContent( $noredir = false )
 118         {
 119                 global $wgOut, $wgMwRedir;
 120                 global $oldid, $redirect; # From query
 121
 122                 if ( $this->mContentLoaded ) return;
 123                 $fname = "Article::loadContent";
 124
 125                 # Pre-fill content with error message so that if something
 126                 # fails we'll have something telling us what we intended.
 127
 128                 $t = $this->mTitle->getPrefixedText();
 129                 if ( isset( $oldid ) ) {
 130                         $oldid = IntVal( $oldid );
 131                         $t .= ",oldid={$oldid}";
 132                 }
 133                 if ( isset( $redirect ) ) {
 134                         $redirect = ($redirect == "no") ? "no" : "yes";
 135                         $t .= ",redirect={$redirect}";
 136                 }
 137                 $this->mContent = wfMsg( "missingarticle", $t );
 138
 139                 if ( ! $oldid ) {       # Retrieve current version
 140                         $id = $this->getID();
 141                         if ( 0 == $id ) return;
 142
 143                         $sql = "SELECT " .
 144                           "cur_text,cur_timestamp,cur_user,cur_counter,cur_restrictions,cur_touched " .
 145                           "FROM cur WHERE cur_id={$id}";
 146                         wfDebug( "$sql\n" );
 147                         $res = wfQuery( $sql, DB_READ, $fname );
 148                         if ( 0 == wfNumRows( $res ) ) {
 149                                 return;
 150                         }
 151
 152                         $s = wfFetchObject( $res );
 153                         # If we got a redirect, follow it (unless we've been told
 154                         # not to by either the function parameter or the query
 155                         if ( ( "no" != $redirect ) && ( false == $noredir ) &&
 156                           ( $wgMwRedir->matchStart( $s->cur_text ) ) ) {
 157                                 if ( preg_match( "/\\[\\[([^\\]\\|]+)[\\]\\|]/",
 158                                   $s->cur_text, $m ) ) {
 159                                         $rt = Title::newFromText( $m[1] );
 160                                         if( $rt ) {
 161                                                 # Gotta hand redirects to special pages differently:
 162                                                 # Fill the HTTP response "Location" header and ignore
 163                                                 # the rest of the page we're on.
 164
 165                                                 if ( $rt->getInterwiki() != "" ) {
 166                                                         $wgOut->redirect( $rt->getFullURL() ) ;
 167                                                         return;
 168                                                 }
 169                                                 if ( $rt->getNamespace() == Namespace::getSpecial() ) {
 170                                                         $wgOut->redirect( $rt->getFullURL() );
 171                                                         return;
 172                                                 }
 173                                                 $rid = $rt->getArticleID();
 174                                                 if ( 0 != $rid ) {
 175                                                         $sql = "SELECT cur_text,cur_timestamp,cur_user," .
 176                                                           "cur_counter,cur_restrictions,cur_touched FROM cur WHERE cur_id={$rid}";
 177                                                         $res = wfQuery( $sql, DB_READ, $fname );
 178
 179                                                         if ( 0 != wfNumRows( $res ) ) {
 180                                                                 $this->mRedirectedFrom = $this->mTitle->getPrefixedText();
 181                                                                 $this->mTitle = $rt;
 182                                                                 $s = wfFetchObject( $res );
 183                                                         }
 184                                                 }
 185                                         }
 186                                 }
 187                         }
 188
 189                         $this->mContent = $s->cur_text;
 190                         $this->mUser = $s->cur_user;
 191                         $this->mCounter = $s->cur_counter;
 192                         $this->mTimestamp = $s->cur_timestamp;
 193                         $this->mTouched = $s->cur_touched;
 194                         $this->mTitle->mRestrictions = explode( ",", trim( $s->cur_restrictions ) );
 195                         $this->mTitle->mRestrictionsLoaded = true;
 196                         wfFreeResult( $res );
 197                 } else { # oldid set, retrieve historical version
 198                         $sql = "SELECT old_text,old_timestamp,old_user,old_flags FROM old " .
 199                           "WHERE old_id={$oldid}";
 200                         $res = wfQuery( $sql, DB_READ, $fname );
 201                         if ( 0 == wfNumRows( $res ) ) { return; }
 202
 203                         $s = wfFetchObject( $res );
 204                         $this->mContent = Article::getRevisionText( $s );
 205                         $this->mUser = $s->old_user;
 206                         $this->mCounter = 0;
 207                         $this->mTimestamp = $s->old_timestamp;
 208                         wfFreeResult( $res );
 209                 }
 210                 $this->mContentLoaded = true;
 211         }
 212
 213         function getID() {
 214                 if( $this->mTitle ) {
 215                         return $this->mTitle->getArticleID();
 216                 } else {
 217                         return 0;
 218                 }
 219         }
 220
 221         function getCount()
 222         {
 223                 if ( -1 == $this->mCounter ) {
 224                         $id = $this->getID();
 225                         $this->mCounter = wfGetSQL( "cur", "cur_counter", "cur_id={$id}" );
 226                 }
 227                 return $this->mCounter;
 228         }
 229
 230         # Would the given text make this article a "good" article (i.e.,
 231         # suitable for including in the article count)?
 232
 233         function isCountable( $text )
 234         {
 235                 global $wgUseCommaCount, $wgMwRedir;
 236
 237                 if ( 0 != $this->mTitle->getNamespace() ) { return 0; }
 238                 if ( $wgMwRedir->matchStart( $text ) ) { return 0; }
 239                 $token = ($wgUseCommaCount ? "," : "[[" );
 240                 if ( false === strstr( $text, $token ) ) { return 0; }
 241                 return 1;
 242         }
 243
 244         # Loads everything from cur except cur_text
 245         # This isn't necessary for all uses, so it's only done if needed.
 246
 247         /* private */ function loadLastEdit()
 248         {
 249                 global $wgOut;
 250                 if ( -1 != $this->mUser ) return;
 251
 252                 $sql = "SELECT cur_user,cur_user_text,cur_timestamp," .
 253                   "cur_comment,cur_minor_edit FROM cur WHERE " .
 254                   "cur_id=" . $this->getID();
 255                 $res = wfQuery( $sql, DB_READ, "Article::loadLastEdit" );
 256
 257                 if ( wfNumRows( $res ) > 0 ) {
 258                         $s = wfFetchObject( $res );
 259                         $this->mUser = $s->cur_user;
 260                         $this->mUserText = $s->cur_user_text;
 261                         $this->mTimestamp = $s->cur_timestamp;
 262                         $this->mComment = $s->cur_comment;
 263                         $this->mMinorEdit = $s->cur_minor_edit;
 264                 }
 265         }
 266
 267         function getTimestamp()
 268         {
 269                 $this->loadLastEdit();
 270                 return $this->mTimestamp;
 271         }
 272
 273         function getUser()
 274         {
 275                 $this->loadLastEdit();
 276                 return $this->mUser;
 277         }
 278
 279         function getUserText()
 280         {
 281                 $this->loadLastEdit();
 282                 return $this->mUserText;
 283         }
 284
 285         function getComment()
 286         {
 287                 $this->loadLastEdit();
 288                 return $this->mComment;
 289         }
 290
 291         function getMinorEdit()
 292         {
 293                 $this->loadLastEdit();
 294                 return $this->mMinorEdit;
 295         }
 296
 297         # This is the default action of the script: just view the page of
 298         # the given title.
 299
 300         function view()
 301         {
 302                 global $wgUser, $wgOut, $wgLang;
 303                 global $oldid, $diff; # From query
 304                 global $wgLinkCache, $IP, $wgEnableParserCache;
 305
 306                 $fname = "Article::view";
 307                 wfProfileIn( $fname );
 308
 309                 $wgOut->setArticleFlag( true );
 310                 $wgOut->setRobotpolicy( "index,follow" );
 311
 312                 # If we got diff and oldid in the query, we want to see a
 313                 # diff page instead of the article.
 314
 315                 if ( isset( $diff ) ) {
 316                         $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
 317                         $de = new DifferenceEngine( $oldid, $diff );
 318                         $de->showDiffPage();
 319                         wfProfileOut( $fname );
 320                         return;
 321                 }
 322
 323                 if ( !isset( $oldid ) and $this->checkTouched() ) {
 324                         if( $wgOut->checkLastModified( $this->mTouched ) ){
 325                                 return;
 326                         } else if ( $this->tryFileCache() ) {
 327                                 # tell wgOut that output is taken care of
 328                                 $wgOut->disable();
 329                                 $this->viewUpdates();
 330                                 return;
 331                         }
 332                 }
 333
 334                 $text = $this->getContent(); # May change mTitle
 335                 $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
 336                 $wgOut->setHTMLTitle( $this->mTitle->getPrefixedText() .
 337                   " - " . wfMsg( "wikititlesuffix" ) );
 338
 339                 # We're looking at an old revision
 340
 341                 if ( $oldid ) {
 342                         $this->setOldSubtitle();
 343                         $wgOut->setRobotpolicy( "noindex,follow" );
 344                 }
 345                 if ( "" != $this->mRedirectedFrom ) {
 346                         $sk = $wgUser->getSkin();
 347                         $redir = $sk->makeKnownLink( $this->mRedirectedFrom, "",
 348                           "redirect=no" );
 349                         $s = wfMsg( "redirectedfrom", $redir );
 350                         $wgOut->setSubtitle( $s );
 351                 }
 352
 353                 $wgLinkCache->preFill( $this->mTitle );
 354
 355                 if( $wgEnableParserCache && intval($wgUser->getOption( "stubthreshold" )) == 0 ){
 356                         $wgOut->addWikiText( $text, true, $this );
 357                 } else {
 358                         $wgOut->addWikiText( $text );
 359                 }
 360
 361                 # Add link titles as META keywords
 362                 $wgOut->addMetaTags() ;
 363
 364                 $this->viewUpdates();
 365                 wfProfileOut( $fname );
 366         }
 367
 368         # Theoretically we could defer these whole insert and update
 369         # functions for after display, but that's taking a big leap
 370         # of faith, and we want to be able to report database
 371         # errors at some point.
 372
 373         /* private */ function insertNewArticle( $text, $summary, $isminor, $watchthis )
 374         {
 375                 global $wgOut, $wgUser, $wgLinkCache, $wgMwRedir;
 376                 global $wgUseSquid, $wgDeferredUpdateList, $wgInternalServer;
 377
 378                 $fname = "Article::insertNewArticle";
 379
 380                 $this->mCountAdjustment = $this->isCountable( $text );
 381
 382                 $ns = $this->mTitle->getNamespace();
 383                 $ttl = $this->mTitle->getDBkey();
 384                 $text = $this->preSaveTransform( $text );
 385                 if ( $wgMwRedir->matchStart( $text ) ) { $redir = 1; }
 386                 else { $redir = 0; }
 387
 388                 $now = wfTimestampNow();
 389                 $won = wfInvertTimestamp( $now );
 390                 wfSeedRandom();
 391                 $rand = number_format( mt_rand() / mt_getrandmax(), 12, ".", "" );
 392                 $isminor = ( $isminor && $wgUser->getID() ) ? 1 : 0;
 393                 $sql = "INSERT INTO cur (cur_namespace,cur_title,cur_text," .
 394                   "cur_comment,cur_user,cur_timestamp,cur_minor_edit,cur_counter," .
 395                   "cur_restrictions,cur_user_text,cur_is_redirect," .
 396                   "cur_is_new,cur_random,cur_touched,inverse_timestamp) VALUES ({$ns},'" . wfStrencode( $ttl ) . "', '" .
 397                   wfStrencode( $text ) . "', '" .
 398                   wfStrencode( $summary ) . "', '" .
 399                   $wgUser->getID() . "', '{$now}', " .
 400                   $isminor . ", 0, '', '" .
 401                   wfStrencode( $wgUser->getName() ) . "', $redir, 1, $rand, '{$now}', '{$won}')";
 402                 $res = wfQuery( $sql, DB_WRITE, $fname );
 403
 404                 $newid = wfInsertId();
 405                 $this->mTitle->resetArticleID( $newid );
 406
 407                 Article::onArticleCreate( $this->mTitle );
 408                 RecentChange::notifyNew( $now, $this->mTitle, $isminor, $wgUser, $summary );
 409
 410                 if ($watchthis) {
 411                         if(!$this->mTitle->userIsWatching()) $this->watch();
 412                 } else {
 413                         if ( $this->mTitle->userIsWatching() ) {
 414                                 $this->unwatch();
 415                         }
 416                 }
 417
 418                 # The talk page isn't in the regular link tables, so we need to update manually:
 419                 $talkns = $ns ^ 1; # talk -> normal; normal -> talk
 420                 $sql = "UPDATE cur set cur_touched='$now' WHERE cur_namespace=$talkns AND cur_title='" . wfStrencode( $ttl ) . "'";
 421                 wfQuery( $sql, DB_WRITE );
 422
 423                 # standard deferred updates
 424                 $this->editUpdates( $text );
 425
 426                 $this->showArticle( $text, wfMsg( "newarticle" ) );
 427         }
 428
 429
 430         /* Side effects: loads last edit */
 431         function getTextOfLastEditWithSectionReplacedOrAdded($section, $text, $summary = ""){
 432                 $this->loadLastEdit();
 433                 $oldtext = $this->getContent();
 434                 if ($section != "") {
 435                         if($section=="new") {
 436                                 if($summary) $subject="== {$summary} ==\n\n";
 437                                 $text=$oldtext."\n\n".$subject.$text;
 438                         } else {
 439                                 $secs=preg_split("/(^=+.*?=+|^<h[1-6].*?>.*?<\/h[1-6].*?>)/mi",
 440                                   $oldtext,-1,PREG_SPLIT_DELIM_CAPTURE);
 441                                 $secs[$section*2]=$text."\n\n"; // replace with edited
 442                                 if($section) { $secs[$section*2-1]=""; } // erase old headline
 443                                 $text=join("",$secs);
 444                         }
 445                 }
 446                 return $text;
 447         }
 448
 449         function updateArticle( $text, $summary, $minor, $watchthis, $forceBot = false )
 450         {
 451                 global $wgOut, $wgUser, $wgLinkCache;
 452                 global $wgDBtransactions, $wgMwRedir;
 453                 global $wgUseSquid, $wgInternalServer;
 454                 $fname = "Article::updateArticle";
 455
 456                 if ( $this->mMinorEdit ) { $me1 = 1; } else { $me1 = 0; }
 457                 if ( $minor && $wgUser->getID() ) { $me2 = 1; } else { $me2 = 0; }
 458                 if ( preg_match( "/^((" . $wgMwRedir->getBaseRegex() . ")[^\\n]+)/i", $text, $m ) ) {
 459                         $redir = 1;
 460                         $text = $m[1] . "\n"; # Remove all content but redirect
 461                 }
 462                 else { $redir = 0; }
 463
 464                 $text = $this->preSaveTransform( $text );
 465
 466                 # Update article, but only if changed.
 467
 468                 if( $wgDBtransactions ) {
 469                         $sql = "BEGIN";
 470                         wfQuery( $sql, DB_WRITE );
 471                 }
 472                 $oldtext = $this->getContent( true );
 473
 474                 if ( 0 != strcmp( $text, $oldtext ) ) {
 475                         $this->mCountAdjustment = $this->isCountable( $text )
 476                           - $this->isCountable( $oldtext );
 477
 478                         $now = wfTimestampNow();
 479                         $won = wfInvertTimestamp( $now );
 480                         $sql = "UPDATE cur SET cur_text='" . wfStrencode( $text ) .
 481                           "',cur_comment='" .  wfStrencode( $summary ) .
 482                           "',cur_minor_edit={$me2}, cur_user=" . $wgUser->getID() .
 483                           ",cur_timestamp='{$now}',cur_user_text='" .
 484                           wfStrencode( $wgUser->getName() ) .
 485                           "',cur_is_redirect={$redir}, cur_is_new=0, cur_touched='{$now}', inverse_timestamp='{$won}' " .
 486                           "WHERE cur_id=" . $this->getID() .
 487                           " AND cur_timestamp='" . $this->getTimestamp() . "'";
 488                         $res = wfQuery( $sql, DB_WRITE, $fname );
 489
 490                         if( wfAffectedRows() == 0 ) {
 491                                 /* Belated edit conflict! Run away!! */
 492                                 return false;
 493                         }
 494
 495                         # This overwrites $oldtext if revision compression is on
 496                         $flags = Article::compressRevisionText( $oldtext );
 497
 498                         $sql = "INSERT INTO old (old_namespace,old_title,old_text," .
 499                           "old_comment,old_user,old_user_text,old_timestamp," .
 500                           "old_minor_edit,inverse_timestamp,old_flags) VALUES (" .
 501                           $this->mTitle->getNamespace() . ", '" .
 502                           wfStrencode( $this->mTitle->getDBkey() ) . "', '" .
 503                           wfStrencode( $oldtext ) . "', '" .
 504                           wfStrencode( $this->getComment() ) . "', " .
 505                           $this->getUser() . ", '" .
 506                           wfStrencode( $this->getUserText() ) . "', '" .
 507                           $this->getTimestamp() . "', " . $me1 . ", '" .
 508                           wfInvertTimestamp( $this->getTimestamp() ) . "','$flags')";
 509                         $res = wfQuery( $sql, DB_WRITE, $fname );
 510                         $oldid = wfInsertID( $res );
 511
 512                         $bot = (int)($wgUser->isBot() || $forceBot);
 513                         RecentChange::notifyEdit( $now, $this->mTitle, $me2, $wgUser, $summary,
 514                                 $oldid, $this->getTimestamp(), $bot );
 515                         Article::onArticleEdit( $this->mTitle );
 516                 }
 517
 518                 if( $wgDBtransactions ) {
 519                         $sql = "COMMIT";
 520                         wfQuery( $sql, DB_WRITE );
 521                 }
 522
 523                 if ($watchthis) {
 524                         if (!$this->mTitle->userIsWatching()) $this->watch();
 525                 } else {
 526                         if ( $this->mTitle->userIsWatching() ) {
 527                                 $this->unwatch();
 528                         }
 529                 }
 530                 # standard deferred updates
 531                 $this->editUpdates( $text );
 532
 533
 534                 $urls = array();
 535                 # Template namespace
 536                 # Purge all articles linking here
 537                 if ( $this->mTitle->getNamespace() == NS_TEMPLATE) {
 538                         $titles = $this->mTitle->getLinksTo();
 539                         Title::touchArray( $titles );
 540                         if ( $wgUseSquid ) {
 541                                 foreach ( $titles as $title ) {
 542                                         $urls[] = $title->getInternalURL();
 543                                 }
 544                         }
 545                 }
 546
 547                 # Squid updates
 548                 if ( $wgUseSquid ) {
 549                         $urls = array_merge( $urls, $this->mTitle->getSquidURLs() );
 550                         $u = new SquidUpdate( $urls );
 551                         $u->doUpdate();
 552                 }
 553
 554                 $this->showArticle( $text, wfMsg( "updated" ) );
 555                 return true;
 556         }
 557
 558         # After we've either updated or inserted the article, update
 559         # the link tables and redirect to the new page.
 560
 561         function showArticle( $text, $subtitle )
 562         {
 563                 global $wgOut, $wgUser, $wgLinkCache;
 564                 global $wgMwRedir;
 565
 566                 $wgLinkCache = new LinkCache();
 567
 568                 # Get old version of link table to allow incremental link updates
 569                 $wgLinkCache->preFill( $this->mTitle );
 570                 $wgLinkCache->clear();
 571
 572                 # Now update the link cache by parsing the text
 573                 $wgOut = new OutputPage();
 574                 $wgOut->addWikiText( $text );
 575
 576                 if( $wgMwRedir->matchStart( $text ) )
 577                         $r = "redirect=no";
 578                 else
 579                         $r = "";
 580                 $wgOut->redirect( $this->mTitle->getFullURL( $r ) );
 581         }
 582
 583         # Add this page to my watchlist
 584
 585         function watch( $add = true )
 586         {
 587                 global $wgUser, $wgOut, $wgLang;
 588                 global $wgDeferredUpdateList;
 589
 590                 if ( 0 == $wgUser->getID() ) {
 591                         $wgOut->errorpage( "watchnologin", "watchnologintext" );
 592                         return;
 593                 }
 594                 if ( wfReadOnly() ) {
 595                         $wgOut->readOnlyPage();
 596                         return;
 597                 }
 598                 if( $add )
 599                         $wgUser->addWatch( $this->mTitle );
 600                 else
 601                         $wgUser->removeWatch( $this->mTitle );
 602
 603                 $wgOut->setPagetitle( wfMsg( $add ? "addedwatch" : "removedwatch" ) );
 604                 $wgOut->setRobotpolicy( "noindex,follow" );
 605
 606                 $sk = $wgUser->getSkin() ;
 607                 $link = $sk->makeKnownLink ( $this->mTitle->getPrefixedText() ) ;
 608
 609                 if($add)
 610                         $text = wfMsg( "addedwatchtext", $link );
 611                 else
 612                         $text = wfMsg( "removedwatchtext", $link );
 613                 $wgOut->addHTML( $text );
 614
 615                 $up = new UserUpdate();
 616                 array_push( $wgDeferredUpdateList, $up );
 617
 618                 $wgOut->returnToMain( false );
 619         }
 620
 621         function unwatch()
 622         {
 623                 $this->watch( false );
 624         }
 625
 626         function protect( $limit = "sysop" )
 627         {
 628                 global $wgUser, $wgOut;
 629
 630                 if ( ! $wgUser->isSysop() ) {
 631                         $wgOut->sysopRequired();
 632                         return;
 633                 }
 634                 if ( wfReadOnly() ) {
 635                         $wgOut->readOnlyPage();
 636                         return;
 637                 }
 638                 $id = $this->mTitle->getArticleID();
 639                 if ( 0 == $id ) {
 640                         $wgOut->fatalEror( wfMsg( "badarticleerror" ) );
 641                         return;
 642                 }
 643         $sql = "UPDATE cur SET cur_touched='" . wfTimestampNow() . "'," .
 644                         "cur_restrictions='{$limit}' WHERE cur_id={$id}";
 645                 wfQuery( $sql, DB_WRITE, "Article::protect" );
 646
 647                 $log = new LogPage( wfMsg( "protectlogpage" ), wfMsg( "protectlogtext" ) );
 648                 if ( $limit === "" ) {
 649                         $log->addEntry( wfMsg( "unprotectedarticle", $this->mTitle->getPrefixedText() ), "" );
 650                 } else {
 651                         $log->addEntry( wfMsg( "protectedarticle", $this->mTitle->getPrefixedText() ), "" );
 652                 }
 653                 $wgOut->redirect( $this->mTitle->getFullURL() );
 654         }
 655
 656         function unprotect()
 657         {
 658                 return $this->protect( "" );
 659         }
 660
 661         function delete()
 662         {
 663                 global $wgUser, $wgOut, $wgMessageCache;
 664                 global $wpConfirm, $wpReason, $image, $oldimage;
 665                 $fname = "Article::delete";
 666
 667                 # This code desperately needs to be totally rewritten
 668
 669                 if ( ( ! $wgUser->isSysop() ) ) {
 670                         $wgOut->sysopRequired();
 671                         return;
 672                 }
 673                 if ( wfReadOnly() ) {
 674                         $wgOut->readOnlyPage();
 675                         return;
 676                 }
 677
 678                 # Can't delete MediaWiki namespace
 679                 if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
 680                         $wgOut->fatalError( wfMsg( "cannotdelete" ) );
 681                         return;
 682                 }
 683
 684                 # Better double-check that it hasn't been deleted yet!
 685                 $wgOut->setPagetitle( wfMsg( "confirmdelete" ) );
 686                 if ( ( "" == trim( $this->mTitle->getText() ) )
 687                   or ( $this->mTitle->getArticleId() == 0 ) ) {
 688                         $wgOut->fatalError( wfMsg( "cannotdelete" ) );
 689                         return;
 690                 }
 691
 692                 if ( @$_POST["wpConfirm"] ) {
 693                         $this->doDelete();
 694                         return;
 695                 }
 696
 697                 # determine whether this page has earlier revisions
 698                 # and insert a warning if it does
 699                 # we select the text because it might be useful below
 700                 $ns = $this->mTitle->getNamespace();
 701                 $title = $this->mTitle->getDBkey();
 702                 $etitle = wfStrencode( $title );
 703                 $sql = "SELECT old_text,old_flags FROM old WHERE old_namespace=$ns and old_title='$etitle' ORDER BY inverse_timestamp LIMIT 1";
 704                 $res = wfQuery( $sql, DB_READ, $fname );
 705                 if( ($old=wfFetchObject($res)) && !$wpConfirm ) {
 706                         $skin=$wgUser->getSkin();
 707                         $wgOut->addHTML("<B>".wfMsg("historywarning"));
 708                         $wgOut->addHTML( $skin->historyLink() ."</B><P>");
 709                 }
 710
 711                 $sql="SELECT cur_text FROM cur WHERE cur_namespace=$ns and cur_title='$etitle'";
 712                 $res=wfQuery($sql, DB_READ, $fname);
 713                 if( ($s=wfFetchObject($res))) {
 714
 715                         # if this is a mini-text, we can paste part of it into the deletion reason
 716
 717                         #if this is empty, an earlier revision may contain "useful" text
 718                         $blanked = false;
 719                         if($s->cur_text!="") {
 720                                 $text=$s->cur_text;
 721                         } else {
 722                                 if($old) {
 723                                         $text = Article::getRevisionText( $old );
 724                                         $blanked = true;
 725                                 }
 726
 727                         }
 728
 729                         $length=strlen($text);
 730
 731                         # this should not happen, since it is not possible to store an empty, new
 732                         # page. Let's insert a standard text in case it does, though
 733                         if($length==0 && !$wpReason) { $wpReason=wfmsg("exblank");}
 734
 735
 736                         if($length < 500 && !$wpReason) {
 737
 738                                 # comment field=255, let's grep the first 150 to have some user
 739                                 # space left
 740                                 $text=substr($text,0,150);
 741                                 # let's strip out newlines and HTML tags
 742                                 $text=preg_replace("/\"/","'",$text);
 743                                 $text=preg_replace("/\</","&lt;",$text);
 744                                 $text=preg_replace("/\>/","&gt;",$text);
 745                                 $text=preg_replace("/[\n\r]/","",$text);
 746                                 if(!$blanked) {
 747                                         $wpReason=wfMsg("excontent"). " '".$text;
 748                                 } else {
 749                                         $wpReason=wfMsg("exbeforeblank") . " '".$text;
 750                                 }
 751                                 if($length>150) { $wpReason .= "..."; } # we've only pasted part of the text
 752                                 $wpReason.="'";
 753                         }
 754                 }
 755
 756                 return $this->confirmDelete();
 757         }
 758
 759         function confirmDelete( $par = "" )
 760         {
 761                 global $wgOut;
 762                 global $wpReason;
 763
 764                 wfDebug( "Article::confirmDelete\n" );
 765
 766                 $sub = htmlspecialchars( $this->mTitle->getPrefixedText() );
 767                 $wgOut->setSubtitle( wfMsg( "deletesub", $sub ) );
 768                 $wgOut->setRobotpolicy( "noindex,nofollow" );
 769                 $wgOut->addWikiText( wfMsg( "confirmdeletetext" ) );
 770
 771                 $formaction = $this->mTitle->escapeLocalURL( "action=delete" . $par );
 772
 773                 $confirm = wfMsg( "confirm" );
 774                 $check = wfMsg( "confirmcheck" );
 775                 $delcom = wfMsg( "deletecomment" );
 776
 777                 $wgOut->addHTML( "
 778 <form id=\"deleteconfirm\" method=\"post\" action=\"{$formaction}\">
 779 <table border=0><tr><td align=right>
 780 {$delcom}:</td><td align=left>
 781 <input type=text size=60 name=\"wpReason\" value=\"" . htmlspecialchars( $wpReason ) . "\">
 782 </td></tr><tr><td>&nbsp;</td></tr>
 783 <tr><td align=right>
 784 <input type=checkbox name=\"wpConfirm\" value='1' id=\"wpConfirm\">
 785 </td><td><label for=\"wpConfirm\">{$check}</label></td>
 786 </tr><tr><td>&nbsp;</td><td>
 787 <input type=submit name=\"wpConfirmB\" value=\"{$confirm}\">
 788 </td></tr></table></form>\n" );
 789
 790                 $wgOut->returnToMain( false );
 791         }
 792
 793         function doDelete()
 794         {
 795                 global $wgOut, $wgUser, $wgLang;
 796                 global $wpReason;
 797                 $fname = "Article::doDelete";
 798                 wfDebug( "$fname\n" );
 799
 800                 if ( $this->doDeleteArticle() ) {
 801                         $deleted = $this->mTitle->getPrefixedText();
 802
 803                         $wgOut->setPagetitle( wfMsg( "actioncomplete" ) );
 804                         $wgOut->setRobotpolicy( "noindex,nofollow" );
 805
 806                         $sk = $wgUser->getSkin();
 807                         $loglink = $sk->makeKnownLink( $wgLang->getNsText(
 808                           Namespace::getWikipedia() ) .
 809                           ":" . wfMsg( "dellogpage" ), wfMsg( "deletionlog" ) );
 810
 811                         $text = wfMsg( "deletedtext", $deleted, $loglink );
 812
 813                         $wgOut->addHTML( "<p>" . $text );
 814                         $wgOut->returnToMain( false );
 815                 } else {
 816                         $wgOut->fatalError( wfMsg( "cannotdelete" ) );
 817                 }
 818         }
 819
 820         # Delete the article, returns success
 821         function doDeleteArticle()
 822         {
 823                 global $wgUser, $wgLang, $wgRequest;
 824                 global  $wgUseSquid, $wgDeferredUpdateList, $wgInternalServer;
 825
 826                 $fname = "Article::doDeleteArticle";
 827                 wfDebug( "$fname\n" );
 828
 829                 $ns = $this->mTitle->getNamespace();
 830                 $t = wfStrencode( $this->mTitle->getDBkey() );
 831                 $id = $this->mTitle->getArticleID();
 832
 833                 if ( "" == $t || $id == 0 ) {
 834                         return false;
 835                 }
 836
 837                 $u = new SiteStatsUpdate( 0, 1, -$this->isCountable( $this->getContent( true ) ) );
 838                 array_push( $wgDeferredUpdateList, $u );
 839
 840                 $linksTo = $this->mTitle->getLinksTo();
 841
 842                 # Squid purging
 843                 if ( $wgUseSquid ) {
 844                         $urls = array(
 845                                 $this->mTitle->getInternalURL(),
 846                                 $this->mTitle->getInternalURL( "history" )
 847                         );
 848                         foreach ( $linksTo as $linkTo ) {
 849                                 $urls[] = $linkTo->getInternalURL();
 850                         }
 851
 852                         $u = new SquidUpdate( $urls );
 853                         array_push( $wgDeferredUpdateList, $u );
 854
 855                 }
 856
 857                 # Client and file cache invalidation
 858                 Title::touchArray( $linksTo );
 859
 860                 # Move article and history to the "archive" table
 861                 $sql = "INSERT INTO archive (ar_namespace,ar_title,ar_text," .
 862                   "ar_comment,ar_user,ar_user_text,ar_timestamp,ar_minor_edit," .
 863                   "ar_flags) SELECT cur_namespace,cur_title,cur_text,cur_comment," .
 864                   "cur_user,cur_user_text,cur_timestamp,cur_minor_edit,0 FROM cur " .
 865                   "WHERE cur_namespace={$ns} AND cur_title='{$t}'";
 866                 wfQuery( $sql, DB_WRITE, $fname );
 867
 868                 $sql = "INSERT INTO archive (ar_namespace,ar_title,ar_text," .
 869                   "ar_comment,ar_user,ar_user_text,ar_timestamp,ar_minor_edit," .
 870                   "ar_flags) SELECT old_namespace,old_title,old_text,old_comment," .
 871                   "old_user,old_user_text,old_timestamp,old_minor_edit,old_flags " .
 872                   "FROM old WHERE old_namespace={$ns} AND old_title='{$t}'";
 873                 wfQuery( $sql, DB_WRITE, $fname );
 874
 875                 # Now that it's safely backed up, delete it
 876
 877                 $sql = "DELETE FROM cur WHERE cur_namespace={$ns} AND " .
 878                   "cur_title='{$t}'";
 879                 wfQuery( $sql, DB_WRITE, $fname );
 880
 881                 $sql = "DELETE FROM old WHERE old_namespace={$ns} AND " .
 882                   "old_title='{$t}'";
 883                 wfQuery( $sql, DB_WRITE, $fname );
 884
 885                 $sql = "DELETE FROM recentchanges WHERE rc_namespace={$ns} AND " .
 886                   "rc_title='{$t}'";
 887                 wfQuery( $sql, DB_WRITE, $fname );
 888
 889                 # Finally, clean up the link tables
 890                 $t = wfStrencode( $this->mTitle->getPrefixedDBkey() );
 891
 892                 Article::onArticleDelete( $this->mTitle );
 893
 894                 $sql = "INSERT INTO brokenlinks (bl_from,bl_to) VALUES ";
 895                 $first = true;
 896
 897                 foreach ( $linksTo as $titleObj ) {
 898                         if ( ! $first ) { $sql .= ","; }
 899                         $first = false;
 900                         # Get article ID. Efficient because it was loaded into the cache by getLinksTo().
 901                         $linkID = $titleObj->getArticleID();
 902                         $sql .= "({$linkID},'{$t}')";
 903                 }
 904                 if ( ! $first ) {
 905                         wfQuery( $sql, DB_WRITE, $fname );
 906                 }
 907
 908                 $sql = "DELETE FROM links WHERE l_to={$id}";
 909                 wfQuery( $sql, DB_WRITE, $fname );
 910
 911                 $sql = "DELETE FROM links WHERE l_from={$id}";
 912                 wfQuery( $sql, DB_WRITE, $fname );
 913
 914                 $sql = "DELETE FROM imagelinks WHERE il_from={$id}";
 915                 wfQuery( $sql, DB_WRITE, $fname );
 916
 917                 $sql = "DELETE FROM brokenlinks WHERE bl_from={$id}";
 918                 wfQuery( $sql, DB_WRITE, $fname );
 919
 920                 $log = new LogPage( wfMsg( "dellogpage" ), wfMsg( "dellogpagetext" ) );
 921                 $art = $this->mTitle->getPrefixedText();
 922                 $wpReason = $wgRequest->getText( "wpReason" );
 923                 $log->addEntry( wfMsg( "deletedarticle", $art ), $wpReason );
 924
 925                 # Clear the cached article id so the interface doesn't act like we exist
 926                 $this->mTitle->resetArticleID( 0 );
 927                 $this->mTitle->mArticleID = 0;
 928                 return true;
 929         }
 930
 931         function rollback()
 932         {
 933                 global $wgUser, $wgLang, $wgOut, $wgRequest;
 934
 935                 if ( ! $wgUser->isSysop() ) {
 936                         $wgOut->sysopRequired();
 937                         return;
 938                 }
 939                 if ( wfReadOnly() ) {
 940                         $wgOut->readOnlyPage( $this->getContent() );
 941                         return;
 942                 }
 943
 944                 # Enhanced rollback, marks edits rc_bot=1
 945                 $bot = $wgRequest->getBool( 'bot' );
 946
 947                 # Replace all this user's current edits with the next one down
 948                 $tt = wfStrencode( $this->mTitle->getDBKey() );
 949                 $n = $this->mTitle->getNamespace();
 950
 951                 # Get the last editor
 952                 $sql = "SELECT cur_id,cur_user,cur_user_text,cur_comment FROM cur WHERE cur_title='{$tt}' AND cur_namespace={$n}";
 953                 $res = wfQuery( $sql, DB_READ );
 954                 if( ($x = wfNumRows( $res )) != 1 ) {
 955                         # Something wrong
 956                         $wgOut->addHTML( wfMsg( "notanarticle" ) );
 957                         return;
 958                 }
 959                 $s = wfFetchObject( $res );
 960                 $ut = wfStrencode( $s->cur_user_text );
 961                 $uid = $s->cur_user;
 962                 $pid = $s->cur_id;
 963
 964                 $from = str_replace( '_', ' ', $wgRequest->getVal( "from" ) );
 965                 if( $from != $s->cur_user_text ) {
 966                         $wgOut->setPageTitle(wfmsg("rollbackfailed"));
 967                         $wgOut->addWikiText( wfMsg( "alreadyrolled",
 968                                 htmlspecialchars( $this->mTitle->getPrefixedText()),
 969                                 htmlspecialchars( $from ),
 970                                 htmlspecialchars( $s->cur_user_text ) ) );
 971                         if($s->cur_comment != "") {
 972                                 $wgOut->addHTML(
 973                                         wfMsg("editcomment",
 974                                         htmlspecialchars( $s->cur_comment ) ) );
 975                         }
 976                         return;
 977                 }
 978
 979                 # Get the last edit not by this guy
 980                 $sql = "SELECT old_text,old_user,old_user_text,old_timestamp,old_flags
 981                 FROM old USE INDEX (name_title_timestamp)
 982                 WHERE old_namespace={$n} AND old_title='{$tt}'
 983                 AND (old_user <> {$uid} OR old_user_text <> '{$ut}')
 984                 ORDER BY inverse_timestamp LIMIT 1";
 985                 $res = wfQuery( $sql, DB_READ );
 986                 if( wfNumRows( $res ) != 1 ) {
 987                         # Something wrong
 988                         $wgOut->setPageTitle(wfMsg("rollbackfailed"));
 989                         $wgOut->addHTML( wfMsg( "cantrollback" ) );
 990                         return;
 991                 }
 992                 $s = wfFetchObject( $res );
 993
 994                 if ( $bot ) {
 995                         # Mark all reverted edits as bot
 996                         $sql = "UPDATE recentchanges SET rc_bot=1 WHERE
 997                                 rc_cur_id=$pid AND rc_user=$uid AND rc_timestamp > '{$s->old_timestamp}'";
 998                         wfQuery( $sql, DB_WRITE, $fname );
 999                 }
1000
1001                 # Save it!
1002                 $newcomment = wfMsg( "revertpage", $s->old_user_text, $from );
1003                 $wgOut->setPagetitle( wfMsg( "actioncomplete" ) );
1004                 $wgOut->setRobotpolicy( "noindex,nofollow" );
1005                 $wgOut->addHTML( "<h2>" . $newcomment . "</h2>\n<hr>\n" );
1006                 $this->updateArticle( Article::getRevisionText( $s ), $newcomment, 1, $this->mTitle->userIsWatching(), $bot );
1007                 Article::onArticleEdit( $this->mTitle );
1008                 $wgOut->returnToMain( false );
1009         }
1010
1011
1012         # Do standard deferred updates after page view
1013
1014         /* private */ function viewUpdates()
1015         {
1016                 global $wgDeferredUpdateList;
1017                 if ( 0 != $this->getID() ) {
1018                         global $wgDisableCounters;
1019                         if( !$wgDisableCounters ) {
1020                                 Article::incViewCount( $this->getID() );
1021                                 $u = new SiteStatsUpdate( 1, 0, 0 );
1022                                 array_push( $wgDeferredUpdateList, $u );
1023                         }
1024                         $u = new UserTalkUpdate( 0, $this->mTitle->getNamespace(),
1025                           $this->mTitle->getDBkey() );
1026                         array_push( $wgDeferredUpdateList, $u );
1027                 }
1028         }
1029
1030         # Do standard deferred updates after page edit.
1031         # Every 1000th edit, prune the recent changes table.
1032
1033         /* private */ function editUpdates( $text )
1034         {
1035                 global $wgDeferredUpdateList, $wgDBname, $wgMemc;
1036                 global $wgMessageCache;
1037
1038                 wfSeedRandom();
1039                 if ( 0 == mt_rand( 0, 999 ) ) {
1040                         $cutoff = wfUnix2Timestamp( time() - ( 7 * 86400 ) );
1041                         $sql = "DELETE FROM recentchanges WHERE rc_timestamp < '{$cutoff}'";
1042                         wfQuery( $sql, DB_WRITE );
1043                 }
1044                 $id = $this->getID();
1045                 $title = $this->mTitle->getPrefixedDBkey();
1046                 $shortTitle = $this->mTitle->getDBkey();
1047
1048                 $adj = $this->mCountAdjustment;
1049
1050                 if ( 0 != $id ) {
1051                         $u = new LinksUpdate( $id, $title );
1052                         array_push( $wgDeferredUpdateList, $u );
1053                         $u = new SiteStatsUpdate( 0, 1, $adj );
1054                         array_push( $wgDeferredUpdateList, $u );
1055                         $u = new SearchUpdate( $id, $title, $text );
1056                         array_push( $wgDeferredUpdateList, $u );
1057
1058                         $u = new UserTalkUpdate( 1, $this->mTitle->getNamespace(), $shortTitle );
1059                         array_push( $wgDeferredUpdateList, $u );
1060
1061                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
1062                                 $wgMessageCache->replace( $shortTitle, $text );
1063                         }
1064                 }
1065         }
1066
1067         /* private */ function setOldSubtitle()
1068         {
1069                 global $wgLang, $wgOut;
1070
1071                 $td = $wgLang->timeanddate( $this->mTimestamp, true );
1072                 $r = wfMsg( "revisionasof", $td );
1073                 $wgOut->setSubtitle( "({$r})" );
1074         }
1075
1076         # This function is called right before saving the wikitext,
1077         # so we can do things like signatures and links-in-context.
1078
1079         function preSaveTransform( $text )
1080         {
1081                 global $wgParser, $wgUser;
1082                 return $wgParser->preSaveTransform( $text, $this->mTitle, $wgUser, ParserOptions::newFromUser( $wgUser ) );
1083         }
1084
1085         /* Caching functions */
1086
1087         # checkLastModified returns true if it has taken care of all
1088         # output to the client that is necessary for this request.
1089         # (that is, it has sent a cached version of the page)
1090         function tryFileCache() {
1091                 static $called = false;
1092                 if( $called ) {
1093                         wfDebug( " tryFileCache() -- called twice!?\n" );
1094                         return;
1095                 }
1096                 $called = true;
1097                 if($this->isFileCacheable()) {
1098                         $touched = $this->mTouched;
1099                         if( $this->mTitle->getPrefixedDBkey() == wfMsg( "mainpage" ) ) {
1100                                 # Expire the main page quicker
1101                                 $expire = wfUnix2Timestamp( time() - 3600 );
1102                                 $touched = max( $expire, $touched );
1103                         }
1104                         $cache = new CacheManager( $this->mTitle );
1105                         if($cache->isFileCacheGood( $touched )) {
1106                                 global $wgOut;
1107                                 wfDebug( " tryFileCache() - about to load\n" );
1108                                 $cache->loadFromFileCache();
1109                                 return true;
1110                         } else {
1111                                 wfDebug( " tryFileCache() - starting buffer\n" );
1112                                 ob_start( array(&$cache, 'saveToFileCache' ) );
1113                         }
1114                 } else {
1115                         wfDebug( " tryFileCache() - not cacheable\n" );
1116                 }
1117         }
1118
1119         function isFileCacheable() {
1120                 global $wgUser, $wgUseFileCache, $wgShowIPinHeader;
1121                 global $action, $oldid, $diff, $redirect, $printable;
1122                 return $wgUseFileCache
1123                         and (!$wgShowIPinHeader)
1124                         and ($this->getID() != 0)
1125                         and ($wgUser->getId() == 0)
1126                         and (!$wgUser->getNewtalk())
1127                         and ($this->mTitle->getNamespace() != Namespace::getSpecial())
1128                         and ($action == "view")
1129                         and (!isset($oldid))
1130                         and (!isset($diff))
1131                         and (!isset($redirect))
1132                         and (!isset($printable))
1133                         and (!$this->mRedirectedFrom);
1134         }
1135
1136         function checkTouched() {
1137                 $id = $this->getID();
1138                 $sql = "SELECT cur_touched,cur_is_redirect FROM cur WHERE cur_id=$id";
1139                 $res = wfQuery( $sql, DB_READ, "Article::checkTouched" );
1140                 if( $s = wfFetchObject( $res ) ) {
1141                         $this->mTouched = $s->cur_touched;
1142                         return !$s->cur_is_redirect;
1143                 } else {
1144                         return false;
1145                 }
1146         }
1147
1148         /* static */ function incViewCount( $id )
1149         {
1150                 $id = intval( $id );
1151                 global $wgHitcounterUpdateFreq;
1152
1153                 if( $wgHitcounterUpdateFreq <= 1 ){ //
1154                         wfQuery("UPDATE cur SET cur_counter = cur_counter + 1 " .
1155                                 "WHERE cur_id = $id", DB_WRITE);
1156                         return;
1157                 }
1158
1159                 # Not important enough to warrant an error page in case of failure
1160                 $oldignore = wfIgnoreSQLErrors( true );
1161
1162                 wfQuery("INSERT INTO hitcounter (hc_id) VALUES ({$id})", DB_WRITE);
1163
1164                 $checkfreq = intval( $wgHitcounterUpdateFreq/25 + 1 );
1165                 if( (rand() % $checkfreq != 0) or (wfLastErrno() != 0) ){
1166                         # Most of the time (or on SQL errors), skip row count check
1167                         wfIgnoreSQLErrors( $oldignore );
1168                         return;
1169                 }
1170
1171                 $res = wfQuery("SELECT COUNT(*) as n FROM hitcounter", DB_WRITE);
1172                 $row = wfFetchObject( $res );
1173                 $rown = intval( $row->n );
1174                 if( $rown >= $wgHitcounterUpdateFreq ){
1175                         wfProfileIn( "Article::incViewCount-collect" );
1176                         $old_user_abort = ignore_user_abort( true );
1177
1178                         wfQuery("LOCK TABLES hitcounter WRITE", DB_WRITE);
1179                         wfQuery("CREATE TEMPORARY TABLE acchits TYPE=HEAP ".
1180                                 "SELECT hc_id,COUNT(*) AS hc_n FROM hitcounter ".
1181                                 "GROUP BY hc_id", DB_WRITE);
1182                         wfQuery("DELETE FROM hitcounter", DB_WRITE);
1183                         wfQuery("UNLOCK TABLES", DB_WRITE);
1184                         wfQuery("UPDATE cur,acchits SET cur_counter=cur_counter + hc_n ".
1185                                 "WHERE cur_id = hc_id", DB_WRITE);
1186                         wfQuery("DROP TABLE acchits", DB_WRITE);
1187
1188                         ignore_user_abort( $old_user_abort );
1189                         wfProfileOut( "Article::incViewCount-collect" );
1190                 }
1191                 wfIgnoreSQLErrors( $oldignore );
1192         }
1193
1194         # The onArticle*() functions are supposed to be a kind of hooks
1195         # which should be called whenever any of the specified actions
1196         # are done.
1197         #
1198         # This is a good place to put code to clear caches, for instance.
1199
1200         # This is called on page move and undelete, as well as edit
1201         /* static */ function onArticleCreate($title_obj){
1202                 global $wgEnablePersistentLC, $wgEnableParserCache, $wgUseSquid, $wgDeferredUpdateList;
1203
1204                 $titles = $title_obj->getBrokenLinksTo();
1205
1206                 # Purge squid
1207                 if ( $wgUseSquid ) {
1208                         $urls = $title_obj->getSquidURLs();
1209                         foreach ( $titles as $linkTitle ) {
1210                                 $urls[] = $linkTitle->getInternalURL();
1211                         }
1212                         $u = new SquidUpdate( $urls );
1213                         array_push( $wgDeferredUpdateList, $u );
1214                 }
1215
1216                 # Clear persistent link cache
1217                 if ( $wgEnablePersistentLC ) {
1218                         LinkCache::linksccClearBrokenLinksTo( $title_obj->getPrefixedDBkey() );
1219                 }
1220
1221                 # Clear parser cache (not really used)
1222                 if ( $wgEnableParserCache ) {
1223                         OutputPage::parsercacheClearBrokenLinksTo( $title_obj->getPrefixedDBkey() );
1224                 }
1225         }
1226
1227         /* static */ function onArticleDelete($title_obj){
1228                 global $wgEnablePersistentLC, $wgEnableParserCache;
1229                 if ( $wgEnablePersistentLC ) {
1230                         LinkCache::linksccClearLinksTo( $title_obj->getArticleID() );
1231                 }
1232                 if ( $wgEnableParserCache ) {
1233                         OutputPage::parsercacheClearLinksTo( $title_obj->getArticleID() );
1234                 }
1235         }
1236
1237         /* static */ function onArticleEdit($title_obj){
1238                 global $wgEnablePersistentLC, $wgEnableParserCache;
1239                 if ( $wgEnablePersistentLC ) {
1240                         LinkCache::linksccClearPage( $title_obj->getArticleID() );
1241                 }
1242                 if ( $wgEnableParserCache ) {
1243                         OutputPage::parsercacheClearPage( $title_obj->getArticleID(), $title_obj->getNamespace() );
1244                 }
1245         }
1246 }
1247
1248 ?>