includes/Article.php

   1 <?
   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 /* CHECK MERGE @@@
   9    TEST THIS @@@
  10
  11    * s/\$wgTitle/\$this->mTitle/ performed, many replacements
  12    * mTitle variable added to class
  13 */
  14
  15 include_once( "CacheManager.php" );
  16
  17 class Article {
  18         /* private */ var $mContent, $mContentLoaded;
  19         /* private */ var $mUser, $mTimestamp, $mUserText;
  20         /* private */ var $mCounter, $mComment, $mCountAdjustment;
  21         /* private */ var $mMinorEdit, $mRedirectedFrom;
  22         /* private */ var $mTouched, $mFileCache, $mTitle;
  23
  24         function Article( &$title ) {
  25                 $this->mTitle =& $title;
  26                 $this->clear();
  27         }
  28
  29         /* private */ function clear()
  30         {
  31                 $this->mContentLoaded = false;
  32                 $this->mUser = $this->mCounter = -1; # Not loaded
  33                 $this->mRedirectedFrom = $this->mUserText =
  34                 $this->mTimestamp = $this->mComment = $this->mFileCache = "";
  35                 $this->mCountAdjustment = 0;
  36                 $this->mTouched = "19700101000000";
  37         }
  38
  39         /* static */ function getRevisionText( $row, $prefix = "old_" ) {
  40                 # Deal with optional compression of archived pages.
  41                 # This can be done periodically via maintenance/compressOld.php, and
  42                 # as pages are saved if $wgCompressRevisions is set.
  43                 $text = $prefix . "text";
  44                 $flags = $prefix . "flags";
  45                 if( isset( $row->$flags ) && (false !== strpos( $row->$flags, "gzip" ) ) ) {
  46                         return gzinflate( $row->$text );
  47                 }
  48                 if( isset( $row->$text ) ) {
  49                         return $row->$text;
  50                 }
  51                 return false;
  52         }
  53
  54         /* static */ function compressRevisionText( &$text ) {
  55                 global $wgCompressRevisions;
  56                 if( !$wgCompressRevisions ) {
  57                         return "";
  58                 }
  59                 if( !function_exists( "gzdeflate" ) ) {
  60                         wfDebug( "Article::compressRevisionText() -- no zlib support, not compressing\n" );
  61                         return "";
  62                 }
  63                 $text = gzdeflate( $text );
  64                 return "gzip";
  65         }
  66
  67         # Note that getContent/loadContent may follow redirects if
  68         # not told otherwise, and so may cause a change to mTitle.
  69
  70         function getContent( $noredir = false )
  71         {
  72                 global $action,$section,$count; # From query string
  73                 $fname =  "Article::getContent";
  74                 wfProfileIn( $fname );
  75
  76                 if ( 0 == $this->getID() ) {
  77                         if ( "edit" == $action ) {
  78                                 wfProfileOut( $fname );
  79                                 return ""; # was "newarticletext", now moved above the box)
  80                         }
  81                         wfProfileOut( $fname );
  82                         return wfMsg( "noarticletext" );
  83                 } else {
  84                         $this->loadContent( $noredir );
  85
  86                         if(
  87                                 # check if we're displaying a [[User talk:x.x.x.x]] anonymous talk page
  88                                 ( $this->mTitle->getNamespace() == Namespace::getTalk( Namespace::getUser()) ) &&
  89                                   preg_match("/^\d{1,3}\.\d{1,3}.\d{1,3}\.\d{1,3}$/",$this->mTitle->getText()) &&
  90                                   $action=="view"
  91                                 )
  92                                 {
  93                                 wfProfileOut( $fname );
  94                                 return $this->mContent . "\n" .wfMsg("anontalkpagetext"); }
  95                         else {
  96                                 if($action=="edit") {
  97                                         if($section!="") {
  98                                                 if($section=="new") {
  99                                                         wfProfileOut( $fname );
 100                                                         return "";
 101                                                 }
 102
 103                                                 $secs=preg_split("/(^=+.*?=+|^<h[1-6].*?>.*?<\/h[1-6].*?>)/mi",
 104                                                  $this->mContent, -1,
 105                                                  PREG_SPLIT_DELIM_CAPTURE);
 106                                                 if($section==0) {
 107                                                         wfProfileOut( $fname );
 108                                                         return trim($secs[0]);
 109                                                 } else {
 110                                                         wfProfileOut( $fname );
 111                                                         return trim($secs[$section*2-1] . $secs[$section*2]);
 112                                                 }
 113                                         }
 114                                 }
 115                                 wfProfileOut( $fname );
 116                                 return $this->mContent;
 117                         }
 118                 }
 119         }
 120
 121         function loadContent( $noredir = false )
 122         {
 123                 global $wgOut, $wgMwRedir;
 124                 global $oldid, $redirect; # From query
 125
 126                 if ( $this->mContentLoaded ) return;
 127                 $fname = "Article::loadContent";
 128
 129                 # Pre-fill content with error message so that if something
 130                 # fails we'll have something telling us what we intended.
 131
 132                 $t = $this->mTitle->getPrefixedText();
 133                 if ( isset( $oldid ) ) {
 134                         $oldid = IntVal( $oldid );
 135                         $t .= ",oldid={$oldid}";
 136                 }
 137                 if ( isset( $redirect ) ) {
 138                         $redirect = ($redirect == "no") ? "no" : "yes";
 139                         $t .= ",redirect={$redirect}";
 140                 }
 141                 $this->mContent = wfMsg( "missingarticle", $t );
 142
 143                 if ( ! $oldid ) {       # Retrieve current version
 144                         $id = $this->getID();
 145                         if ( 0 == $id ) return;
 146
 147                         $sql = "SELECT " .
 148                           "cur_text,cur_timestamp,cur_user,cur_counter,cur_restrictions,cur_touched " .
 149                           "FROM cur WHERE cur_id={$id}";
 150                         wfDebug( "$sql\n" );
 151                         $res = wfQuery( $sql, DB_READ, $fname );
 152                         if ( 0 == wfNumRows( $res ) ) {
 153                                 return;
 154                         }
 155
 156                         $s = wfFetchObject( $res );
 157                         # If we got a redirect, follow it (unless we've been told
 158                         # not to by either the function parameter or the query
 159                         if ( ( "no" != $redirect ) && ( false == $noredir ) &&
 160                           ( $wgMwRedir->matchStart( $s->cur_text ) ) ) {
 161                                 if ( preg_match( "/\\[\\[([^\\]\\|]+)[\\]\\|]/",
 162                                   $s->cur_text, $m ) ) {
 163                                         $rt = Title::newFromText( $m[1] );
 164                                         if( $rt ) {
 165                                                 # Gotta hand redirects to special pages differently:
 166                                                 # Fill the HTTP response "Location" header and ignore
 167                                                 # the rest of the page we're on.
 168
 169                                                 if ( $rt->getInterwiki() != "" ) {
 170                                                         $wgOut->redirect( $rt->getFullURL() ) ;
 171                                                         return;
 172                                                 }
 173                                                 if ( $rt->getNamespace() == Namespace::getSpecial() ) {
 174                                                         $wgOut->redirect( wfLocalUrl(
 175                                                           $rt->getPrefixedURL() ) );
 176                                                         return;
 177                                                 }
 178                                                 $rid = $rt->getArticleID();
 179                                                 if ( 0 != $rid ) {
 180                                                         $sql = "SELECT cur_text,cur_timestamp,cur_user," .
 181                                                           "cur_counter,cur_restrictions,cur_touched FROM cur WHERE cur_id={$rid}";
 182                                                         $res = wfQuery( $sql, DB_READ, $fname );
 183
 184                                                         if ( 0 != wfNumRows( $res ) ) {
 185                                                                 $this->mRedirectedFrom = $this->mTitle->getPrefixedText();
 186                                                                 $this->mTitle = $rt;
 187                                                                 $s = wfFetchObject( $res );
 188                                                         }
 189                                                 }
 190                                         }
 191                                 }
 192                         }
 193
 194                         $this->mContent = $s->cur_text;
 195                         $this->mUser = $s->cur_user;
 196                         $this->mCounter = $s->cur_counter;
 197                         $this->mTimestamp = $s->cur_timestamp;
 198                         $this->mTouched = $s->cur_touched;
 199                         $this->mTitle->mRestrictions = explode( ",", trim( $s->cur_restrictions ) );
 200                         $this->mTitle->mRestrictionsLoaded = true;
 201                         wfFreeResult( $res );
 202                 } else { # oldid set, retrieve historical version
 203                         $sql = "SELECT old_text,old_timestamp,old_user,old_flags FROM old " .
 204                           "WHERE old_id={$oldid}";
 205                         $res = wfQuery( $sql, DB_READ, $fname );
 206                         if ( 0 == wfNumRows( $res ) ) { return; }
 207
 208                         $s = wfFetchObject( $res );
 209                         $this->mContent = Article::getRevisionText( $s );
 210                         $this->mUser = $s->old_user;
 211                         $this->mCounter = 0;
 212                         $this->mTimestamp = $s->old_timestamp;
 213                         wfFreeResult( $res );
 214                 }
 215                 $this->mContentLoaded = true;
 216         }
 217
 218         function getID() {
 219                 if( $this->mTitle ) {
 220                         return $this->mTitle->getArticleID();
 221                 } else {
 222                         return 0;
 223                 }
 224         }
 225
 226         function getCount()
 227         {
 228                 if ( -1 == $this->mCounter ) {
 229                         $id = $this->getID();
 230                         $this->mCounter = wfGetSQL( "cur", "cur_counter", "cur_id={$id}" );
 231                 }
 232                 return $this->mCounter;
 233         }
 234
 235         # Would the given text make this article a "good" article (i.e.,
 236         # suitable for including in the article count)?
 237
 238         function isCountable( $text )
 239         {
 240                 global $wgUseCommaCount, $wgMwRedir;
 241
 242                 if ( 0 != $this->mTitle->getNamespace() ) { return 0; }
 243                 if ( $wgMwRedir->matchStart( $text ) ) { return 0; }
 244                 $token = ($wgUseCommaCount ? "," : "[[" );
 245                 if ( false === strstr( $text, $token ) ) { return 0; }
 246                 return 1;
 247         }
 248
 249         # Load the field related to the last edit time of the article.
 250         # This isn't necessary for all uses, so it's only done if needed.
 251
 252         /* private */ function loadLastEdit()
 253         {
 254                 global $wgOut;
 255                 if ( -1 != $this->mUser ) return;
 256
 257                 $sql = "SELECT cur_user,cur_user_text,cur_timestamp," .
 258                   "cur_comment,cur_minor_edit FROM cur WHERE " .
 259                   "cur_id=" . $this->getID();
 260                 $res = wfQuery( $sql, DB_READ, "Article::loadLastEdit" );
 261
 262                 if ( wfNumRows( $res ) > 0 ) {
 263                         $s = wfFetchObject( $res );
 264                         $this->mUser = $s->cur_user;
 265                         $this->mUserText = $s->cur_user_text;
 266                         $this->mTimestamp = $s->cur_timestamp;
 267                         $this->mComment = $s->cur_comment;
 268                         $this->mMinorEdit = $s->cur_minor_edit;
 269                 }
 270         }
 271
 272         function getTimestamp()
 273         {
 274                 $this->loadLastEdit();
 275                 return $this->mTimestamp;
 276         }
 277
 278         function getUser()
 279         {
 280                 $this->loadLastEdit();
 281                 return $this->mUser;
 282         }
 283
 284         function getUserText()
 285         {
 286                 $this->loadLastEdit();
 287                 return $this->mUserText;
 288         }
 289
 290         function getComment()
 291         {
 292                 $this->loadLastEdit();
 293                 return $this->mComment;
 294         }
 295
 296         function getMinorEdit()
 297         {
 298                 $this->loadLastEdit();
 299                 return $this->mMinorEdit;
 300         }
 301
 302         # This is the default action of the script: just view the page of
 303         # the given title.
 304
 305         function view()
 306         {
 307                 global $wgUser, $wgOut, $wgLang;
 308                 global $oldid, $diff; # From query
 309                 global $wgLinkCache, $IP;
 310                 $fname = "Article::view";
 311                 wfProfileIn( $fname );
 312
 313                 $wgOut->setArticleFlag( true );
 314                 $wgOut->setRobotpolicy( "index,follow" );
 315
 316                 # If we got diff and oldid in the query, we want to see a
 317                 # diff page instead of the article.
 318
 319                 if ( isset( $diff ) ) {
 320                         $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
 321                         $de = new DifferenceEngine( $oldid, $diff );
 322                         $de->showDiffPage();
 323                         wfProfileOut( $fname );
 324                         return;
 325                 }
 326
 327                 if ( !isset( $oldid ) and $this->checkTouched() ) {
 328                         if( $wgOut->checkLastModified( $this->mTouched ) ){
 329                                 return;
 330                         } else if ( $this->tryFileCache() ) {
 331                                 # tell wgOut that output is taken care of
 332                                 $wgOut->disable();
 333                                 $this->viewUpdates();
 334                                 return;
 335                         }
 336                 }
 337
 338                 $text = $this->getContent(); # May change mTitle
 339                 $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
 340                 $wgOut->setHTMLTitle( $this->mTitle->getPrefixedText() .
 341                   " - " . wfMsg( "wikititlesuffix" ) );
 342
 343                 # We're looking at an old revision
 344
 345                 if ( $oldid ) {
 346                         $this->setOldSubtitle();
 347                         $wgOut->setRobotpolicy( "noindex,follow" );
 348                 }
 349                 if ( "" != $this->mRedirectedFrom ) {
 350                         $sk = $wgUser->getSkin();
 351                         $redir = $sk->makeKnownLink( $this->mRedirectedFrom, "",
 352                           "redirect=no" );
 353                         $s = wfMsg( "redirectedfrom", $redir );
 354                         $wgOut->setSubtitle( $s );
 355                 }
 356
 357                 $wgLinkCache->preFill( $this->mTitle );
 358                 $wgOut->addWikiText( $text );
 359
 360                 $this->viewUpdates();
 361                 wfProfileOut( $fname );
 362         }
 363
 364         # Theoretically we could defer these whole insert and update
 365         # functions for after display, but that's taking a big leap
 366         # of faith, and we want to be able to report database
 367         # errors at some point.
 368
 369         /* private */ function insertNewArticle( $text, $summary, $isminor, $watchthis )
 370         {
 371                 global $wgOut, $wgUser, $wgLinkCache, $wgMwRedir;
 372
 373                 $fname = "Article::insertNewArticle";
 374
 375                 $this->mCountAdjustment = $this->isCountable( $text );
 376
 377                 $ns = $this->mTitle->getNamespace();
 378                 $ttl = $this->mTitle->getDBkey();
 379                 $text = $this->preSaveTransform( $text );
 380                 if ( $wgMwRedir->matchStart( $text ) ) { $redir = 1; }
 381                 else { $redir = 0; }
 382
 383                 $now = wfTimestampNow();
 384                 $won = wfInvertTimestamp( $now );
 385                 wfSeedRandom();
 386                 $rand = number_format( mt_rand() / mt_getrandmax(), 12, ".", "" );
 387                 $sql = "INSERT INTO cur (cur_namespace,cur_title,cur_text," .
 388                   "cur_comment,cur_user,cur_timestamp,cur_minor_edit,cur_counter," .
 389                   "cur_restrictions,cur_user_text,cur_is_redirect," .
 390                   "cur_is_new,cur_random,cur_touched,inverse_timestamp) VALUES ({$ns},'" . wfStrencode( $ttl ) . "', '" .
 391                   wfStrencode( $text ) . "', '" .
 392                   wfStrencode( $summary ) . "', '" .
 393                   $wgUser->getID() . "', '{$now}', " .
 394                   ( $isminor ? 1 : 0 ) . ", 0, '', '" .
 395                   wfStrencode( $wgUser->getName() ) . "', $redir, 1, $rand, '{$now}', '{$won}')";
 396                 $res = wfQuery( $sql, DB_WRITE, $fname );
 397
 398                 $newid = wfInsertId();
 399                 $this->mTitle->resetArticleID( $newid );
 400
 401                 Article::onArticleCreate( $this->mTitle );
 402
 403                 $sql = "INSERT INTO recentchanges (rc_timestamp,rc_cur_time," .
 404                   "rc_namespace,rc_title,rc_new,rc_minor,rc_cur_id,rc_user," .
 405                   "rc_user_text,rc_comment,rc_this_oldid,rc_last_oldid,rc_bot) VALUES (" .
 406                   "'{$now}','{$now}',{$ns},'" . wfStrencode( $ttl ) . "',1," .
 407                   ( $isminor ? 1 : 0 ) . ",{$newid}," . $wgUser->getID() . ",'" .
 408                   wfStrencode( $wgUser->getName() ) . "','" .
 409                   wfStrencode( $summary ) . "',0,0," .
 410                   ( $wgUser->isBot() ? 1 : 0 ) . ")";
 411                 wfQuery( $sql, DB_WRITE, $fname );
 412                 if ($watchthis) {
 413                         if(!$this->mTitle->userIsWatching()) $this->watch();
 414                 } else {
 415                         if ( $this->mTitle->userIsWatching() ) {
 416                                 $this->unwatch();
 417                         }
 418                 }
 419
 420                 # The talk page isn't in the regular link tables, so we need to update manually:
 421                 $talkns = $ns ^ 1; # talk -> normal; normal -> talk
 422                 $sql = "UPDATE cur set cur_touched='$now' WHERE cur_namespace=$talkns AND cur_title='" . wfStrencode( $ttl ) . "'";
 423                 wfQuery( $sql, DB_WRITE );
 424
 425                 $this->showArticle( $text, wfMsg( "newarticle" ) );
 426         }
 427
 428         function updateArticle( $text, $summary, $minor, $watchthis, $section = "", $forceBot = false )
 429         {
 430                 global $wgOut, $wgUser, $wgLinkCache;
 431                 global $wgDBtransactions, $wgMwRedir;
 432                 $fname = "Article::updateArticle";
 433
 434                 $this->loadLastEdit();
 435
 436                 // insert updated section into old text if we have only edited part
 437                 // of the article
 438                 if ($section != "") {
 439                         $oldtext=$this->getContent();
 440                         if($section=="new") {
 441                                 if($summary) $subject="== {$summary} ==\n\n";
 442                                 $text=$oldtext."\n\n".$subject.$text;
 443                         } else {
 444                                 $secs=preg_split("/(^=+.*?=+|^<h[1-6].*?>.*?<\/h[1-6].*?>)/mi",
 445                                   $oldtext,-1,PREG_SPLIT_DELIM_CAPTURE);
 446                                 $secs[$section*2]=$text."\n\n"; // replace with edited
 447                                 if($section) { $secs[$section*2-1]=""; } // erase old headline
 448                                 $text=join("",$secs);
 449                         }
 450                 }
 451                 if ( $this->mMinorEdit ) { $me1 = 1; } else { $me1 = 0; }
 452                 if ( $minor ) { $me2 = 1; } else { $me2 = 0; }
 453                 if ( preg_match( "/^((" . $wgMwRedir->getBaseRegex() . ")[^\\n]+)/i", $text, $m ) ) {
 454                         $redir = 1;
 455                         $text = $m[1] . "\n"; # Remove all content but redirect
 456                 }
 457                 else { $redir = 0; }
 458
 459                 $text = $this->preSaveTransform( $text );
 460
 461                 # Update article, but only if changed.
 462
 463                 if( $wgDBtransactions ) {
 464                         $sql = "BEGIN";
 465                         wfQuery( $sql, DB_WRITE );
 466                 }
 467                 $oldtext = $this->getContent( true );
 468
 469                 if ( 0 != strcmp( $text, $oldtext ) ) {
 470                         $this->mCountAdjustment = $this->isCountable( $text )
 471                           - $this->isCountable( $oldtext );
 472
 473                         $now = wfTimestampNow();
 474                         $won = wfInvertTimestamp( $now );
 475                         $sql = "UPDATE cur SET cur_text='" . wfStrencode( $text ) .
 476                           "',cur_comment='" .  wfStrencode( $summary ) .
 477                           "',cur_minor_edit={$me2}, cur_user=" . $wgUser->getID() .
 478                           ",cur_timestamp='{$now}',cur_user_text='" .
 479                           wfStrencode( $wgUser->getName() ) .
 480                           "',cur_is_redirect={$redir}, cur_is_new=0, cur_touched='{$now}', inverse_timestamp='{$won}' " .
 481                           "WHERE cur_id=" . $this->getID() .
 482                           " AND cur_timestamp='" . $this->getTimestamp() . "'";
 483                         $res = wfQuery( $sql, DB_WRITE, $fname );
 484
 485                         if( wfAffectedRows() == 0 ) {
 486                                 /* Belated edit conflict! Run away!! */
 487                                 return false;
 488                         }
 489
 490                         # This overwrites $oldtext if revision compression is on
 491                         $flags = Article::compressRevisionText( $oldtext );
 492
 493                         $sql = "INSERT INTO old (old_namespace,old_title,old_text," .
 494                           "old_comment,old_user,old_user_text,old_timestamp," .
 495                           "old_minor_edit,inverse_timestamp,old_flags) VALUES (" .
 496                           $this->mTitle->getNamespace() . ", '" .
 497                           wfStrencode( $this->mTitle->getDBkey() ) . "', '" .
 498                           wfStrencode( $oldtext ) . "', '" .
 499                           wfStrencode( $this->getComment() ) . "', " .
 500                           $this->getUser() . ", '" .
 501                           wfStrencode( $this->getUserText() ) . "', '" .
 502                           $this->getTimestamp() . "', " . $me1 . ", '" .
 503                           wfInvertTimestamp( $this->getTimestamp() ) . "','$flags')";
 504                         $res = wfQuery( $sql, DB_WRITE, $fname );
 505                         $oldid = wfInsertID( $res );
 506
 507                         $bot = (int)($wgUser->isBot() || $forceBot);
 508
 509                         $sql = "INSERT INTO recentchanges (rc_timestamp,rc_cur_time," .
 510                           "rc_namespace,rc_title,rc_new,rc_minor,rc_bot,rc_cur_id,rc_user," .
 511                           "rc_user_text,rc_comment,rc_this_oldid,rc_last_oldid) VALUES (" .
 512                           "'{$now}','{$now}'," . $this->mTitle->getNamespace() . ",'" .
 513                           wfStrencode( $this->mTitle->getDBkey() ) . "',0,{$me2}," .
 514                           "$bot," . $this->getID() . "," . $wgUser->getID() . ",'" .
 515                           wfStrencode( $wgUser->getName() ) . "','" .
 516                           wfStrencode( $summary ) . "',0,{$oldid})";
 517                         wfQuery( $sql, DB_WRITE, $fname );
 518
 519                         $sql = "UPDATE recentchanges SET rc_this_oldid={$oldid} " .
 520                           "WHERE rc_namespace=" . $this->mTitle->getNamespace() . " AND " .
 521                           "rc_title='" . wfStrencode( $this->mTitle->getDBkey() ) . "' AND " .
 522                           "rc_timestamp='" . $this->getTimestamp() . "'";
 523                         wfQuery( $sql, DB_WRITE, $fname );
 524
 525                         $sql = "UPDATE recentchanges SET rc_cur_time='{$now}' " .
 526                           "WHERE rc_cur_id=" . $this->getID();
 527                         wfQuery( $sql, DB_WRITE, $fname );
 528
 529                         Article::onArticleEdit( $this->mTitle );
 530                 }
 531
 532                 if( $wgDBtransactions ) {
 533                         $sql = "COMMIT";
 534                         wfQuery( $sql, DB_WRITE );
 535                 }
 536
 537                 if ($watchthis) {
 538                         if (!$this->mTitle->userIsWatching()) $this->watch();
 539                 } else {
 540                         if ( $this->mTitle->userIsWatching() ) {
 541                                 $this->unwatch();
 542                         }
 543                 }
 544
 545                 $this->showArticle( $text, wfMsg( "updated" ) );
 546                 return true;
 547         }
 548
 549         # After we've either updated or inserted the article, update
 550         # the link tables and redirect to the new page.
 551
 552         function showArticle( $text, $subtitle )
 553         {
 554                 global $wgOut, $wgUser, $wgLinkCache;
 555                 global $wgMwRedir;
 556
 557                 $wgLinkCache = new LinkCache();
 558
 559                 # Get old version of link table to allow incremental link updates
 560                 $wgLinkCache->preFill( $this->mTitle );
 561                 $wgLinkCache->clear();
 562
 563                 # Now update the link cache by parsing the text
 564                 $wgOut = new OutputPage();
 565                 $wgOut->addWikiText( $text );
 566
 567                 $this->editUpdates( $text );
 568                 if( $wgMwRedir->matchStart( $text ) )
 569                         $r = "redirect=no";
 570                 else
 571                         $r = "";
 572                 $wgOut->redirect( wfLocalUrl( $this->mTitle->getPrefixedURL(), $r ) );
 573         }
 574
 575         # Add this page to my watchlist
 576
 577         function watch( $add = true )
 578         {
 579                 global $wgUser, $wgOut, $wgLang;
 580                 global $wgDeferredUpdateList;
 581
 582                 if ( 0 == $wgUser->getID() ) {
 583                         $wgOut->errorpage( "watchnologin", "watchnologintext" );
 584                         return;
 585                 }
 586                 if ( wfReadOnly() ) {
 587                         $wgOut->readOnlyPage();
 588                         return;
 589                 }
 590                 if( $add )
 591                         $wgUser->addWatch( $this->mTitle );
 592                 else
 593                         $wgUser->removeWatch( $this->mTitle );
 594
 595                 $wgOut->setPagetitle( wfMsg( $add ? "addedwatch" : "removedwatch" ) );
 596                 $wgOut->setRobotpolicy( "noindex,follow" );
 597
 598                 $sk = $wgUser->getSkin() ;
 599                 $link = $sk->makeKnownLink ( $this->mTitle->getPrefixedText() ) ;
 600
 601                 if($add)
 602                         $text = wfMsg( "addedwatchtext", $link );
 603                 else
 604                         $text = wfMsg( "removedwatchtext", $link );
 605                 $wgOut->addHTML( $text );
 606
 607                 $up = new UserUpdate();
 608                 array_push( $wgDeferredUpdateList, $up );
 609
 610                 $wgOut->returnToMain( false );
 611         }
 612
 613         function unwatch()
 614         {
 615                 $this->watch( false );
 616         }
 617
 618         function protect( $limit = "sysop" )
 619         {
 620                 global $wgUser, $wgOut;
 621
 622                 if ( ! $wgUser->isSysop() ) {
 623                         $wgOut->sysopRequired();
 624                         return;
 625                 }
 626                 if ( wfReadOnly() ) {
 627                         $wgOut->readOnlyPage();
 628                         return;
 629                 }
 630                 $id = $this->mTitle->getArticleID();
 631                 if ( 0 == $id ) {
 632                         $wgOut->fatalEror( wfMsg( "badarticleerror" ) );
 633                         return;
 634                 }
 635         $sql = "UPDATE cur SET cur_touched='" . wfTimestampNow() . "'," .
 636                         "cur_restrictions='{$limit}' WHERE cur_id={$id}";
 637                 wfQuery( $sql, DB_WRITE, "Article::protect" );
 638
 639                 $log = new LogPage( wfMsg( "protectlogpage" ), wfMsg( "protectlogtext" ) );
 640                 if ( $limit === "" ) {
 641                         $log->addEntry( wfMsg( "unprotectedarticle", $this->mTitle->getPrefixedText() ), "" );
 642                 } else {
 643                         $log->addEntry( wfMsg( "protectedarticle", $this->mTitle->getPrefixedText() ), "" );
 644                 }
 645                 $wgOut->redirect( wfLocalUrl( $this->mTitle->getPrefixedURL() ) );
 646         }
 647
 648         function unprotect()
 649         {
 650                 return $this->protect( "" );
 651         }
 652
 653         function delete()
 654         {
 655                 global $wgUser, $wgOut, $wgMessageCache;
 656                 global $wpConfirm, $wpReason, $image, $oldimage;
 657
 658                 # This code desperately needs to be totally rewritten
 659
 660                 if ( ( ! $wgUser->isSysop() ) ) {
 661                         $wgOut->sysopRequired();
 662                         return;
 663                 }
 664                 if ( wfReadOnly() ) {
 665                         $wgOut->readOnlyPage();
 666                         return;
 667                 }
 668
 669                 # Can't delete cached MediaWiki namespace (i.e. vital messages)
 670                 if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI && $wgMessageCache->isCacheable( $this->mTitle->getDBkey() ) ) {
 671                         $wgOut->fatalError( wfMsg( "cannotdelete" ) );
 672                         return;
 673                 }
 674
 675                 # Better double-check that it hasn't been deleted yet!
 676                 $wgOut->setPagetitle( wfMsg( "confirmdelete" ) );
 677                 if ( ( "" == trim( $this->mTitle->getText() ) )
 678                   or ( $this->mTitle->getArticleId() == 0 ) ) {
 679                         $wgOut->fatalError( wfMsg( "cannotdelete" ) );
 680                         return;
 681                 }
 682
 683                 if ( $_POST["wpConfirm"] ) {
 684                         $this->doDelete();
 685                         return;
 686                 }
 687
 688                 # determine whether this page has earlier revisions
 689                 # and insert a warning if it does
 690                 # we select the text because it might be useful below
 691                 $ns = $this->mTitle->getNamespace();
 692                 $title = $this->mTitle->getDBkey();
 693                 $etitle = wfStrencode( $title );
 694                 $sql = "SELECT old_text,old_flags FROM old WHERE old_namespace=$ns and old_title='$etitle' ORDER BY inverse_timestamp LIMIT 1";
 695                 $res = wfQuery( $sql, DB_READ, $fname );
 696                 if( ($old=wfFetchObject($res)) && !$wpConfirm ) {
 697                         $skin=$wgUser->getSkin();
 698                         $wgOut->addHTML("<B>".wfMsg("historywarning"));
 699                         $wgOut->addHTML( $skin->historyLink() ."</B><P>");
 700                 }
 701
 702                 $sql="SELECT cur_text FROM cur WHERE cur_namespace=$ns and cur_title='$etitle'";
 703                 $res=wfQuery($sql, DB_READ, $fname);
 704                 if( ($s=wfFetchObject($res))) {
 705
 706                         # if this is a mini-text, we can paste part of it into the deletion reason
 707
 708                         #if this is empty, an earlier revision may contain "useful" text
 709                         if($s->cur_text!="") {
 710                                 $text=$s->cur_text;
 711                         } else {
 712                                 if($old) {
 713                                         $text = Article::getRevisionText( $old );
 714                                         $blanked=1;
 715                                 }
 716
 717                         }
 718
 719                         $length=strlen($text);
 720
 721                         # this should not happen, since it is not possible to store an empty, new
 722                         # page. Let's insert a standard text in case it does, though
 723                         if($length==0 && !$wpReason) { $wpReason=wfmsg("exblank");}
 724
 725
 726                         if($length < 500 && !$wpReason) {
 727
 728                                 # comment field=255, let's grep the first 150 to have some user
 729                                 # space left
 730                                 $text=substr($text,0,150);
 731                                 # let's strip out newlines and HTML tags
 732                                 $text=preg_replace("/\"/","'",$text);
 733                                 $text=preg_replace("/\</","&lt;",$text);
 734                                 $text=preg_replace("/\>/","&gt;",$text);
 735                                 $text=preg_replace("/[\n\r]/","",$text);
 736                                 if(!$blanked) {
 737                                         $wpReason=wfMsg("excontent"). " '".$text;
 738                                 } else {
 739                                         $wpReason=wfMsg("exbeforeblank") . " '".$text;
 740                                 }
 741                                 if($length>150) { $wpReason .= "..."; } # we've only pasted part of the text
 742                                 $wpReason.="'";
 743                         }
 744                 }
 745
 746                 return $this->confirmDelete();
 747         }
 748
 749         function confirmDelete( $par = "" )
 750         {
 751                 global $wgOut;
 752                 global $wpReason;
 753
 754                 wfDebug( "Article::confirmDelete\n" );
 755
 756                 $sub = htmlspecialchars( $this->mTitle->getPrefixedText() );
 757                 $wgOut->setSubtitle( wfMsg( "deletesub", $sub ) );
 758                 $wgOut->setRobotpolicy( "noindex,nofollow" );
 759                 $wgOut->addWikiText( wfMsg( "confirmdeletetext" ) );
 760
 761                 $t = $this->mTitle->getPrefixedURL();
 762
 763                 $formaction = wfEscapeHTML( wfLocalUrl( $t, "action=delete" . $par ) );
 764                 $confirm = wfMsg( "confirm" );
 765                 $check = wfMsg( "confirmcheck" );
 766                 $delcom = wfMsg( "deletecomment" );
 767
 768                 $wgOut->addHTML( "
 769 <form id=\"deleteconfirm\" method=\"post\" action=\"{$formaction}\">
 770 <table border=0><tr><td align=right>
 771 {$delcom}:</td><td align=left>
 772 <input type=text size=60 name=\"wpReason\" value=\"" . htmlspecialchars( $wpReason ) . "\">
 773 </td></tr><tr><td>&nbsp;</td></tr>
 774 <tr><td align=right>
 775 <input type=checkbox name=\"wpConfirm\" value='1' id=\"wpConfirm\">
 776 </td><td><label for=\"wpConfirm\">{$check}</label></td>
 777 </tr><tr><td>&nbsp;</td><td>
 778 <input type=submit name=\"wpConfirmB\" value=\"{$confirm}\">
 779 </td></tr></table></form>\n" );
 780
 781                 $wgOut->returnToMain( false );
 782         }
 783
 784         function doDelete()
 785         {
 786                 global $wgOut, $wgUser, $wgLang;
 787                 global $wpReason;
 788                 $fname = "Article::doDelete";
 789                 wfDebug( "$fname\n" );
 790
 791                 $this->doDeleteArticle( $this->mTitle );
 792                 $deleted = $this->mTitle->getPrefixedText();
 793
 794                 $wgOut->setPagetitle( wfMsg( "actioncomplete" ) );
 795                 $wgOut->setRobotpolicy( "noindex,nofollow" );
 796
 797                 $sk = $wgUser->getSkin();
 798                 $loglink = $sk->makeKnownLink( $wgLang->getNsText(
 799                   Namespace::getWikipedia() ) .
 800                   ":" . wfMsg( "dellogpage" ), wfMsg( "deletionlog" ) );
 801
 802                 $text = wfMsg( "deletedtext", $deleted, $loglink );
 803
 804                 $wgOut->addHTML( "<p>" . $text );
 805                 $wgOut->returnToMain( false );
 806         }
 807
 808         function doDeleteArticle( $title )
 809         {
 810                 global $wgUser, $wgOut, $wgLang, $wpReason, $wgDeferredUpdateList;
 811
 812                 $fname = "Article::doDeleteArticle";
 813                 wfDebug( "$fname\n" );
 814
 815                 $ns = $title->getNamespace();
 816                 $t = wfStrencode( $title->getDBkey() );
 817                 $id = $title->getArticleID();
 818
 819                 if ( "" == $t ) {
 820                         $wgOut->fatalError( wfMsg( "cannotdelete" ) );
 821                         return;
 822                 }
 823
 824                 $u = new SiteStatsUpdate( 0, 1, -$this->isCountable( $this->getContent( true ) ) );
 825                 array_push( $wgDeferredUpdateList, $u );
 826
 827                 # Move article and history to the "archive" table
 828                 $sql = "INSERT INTO archive (ar_namespace,ar_title,ar_text," .
 829                   "ar_comment,ar_user,ar_user_text,ar_timestamp,ar_minor_edit," .
 830                   "ar_flags) SELECT cur_namespace,cur_title,cur_text,cur_comment," .
 831                   "cur_user,cur_user_text,cur_timestamp,cur_minor_edit,0 FROM cur " .
 832                   "WHERE cur_namespace={$ns} AND cur_title='{$t}'";
 833                 wfQuery( $sql, DB_WRITE, $fname );
 834
 835                 $sql = "INSERT INTO archive (ar_namespace,ar_title,ar_text," .
 836                   "ar_comment,ar_user,ar_user_text,ar_timestamp,ar_minor_edit," .
 837                   "ar_flags) SELECT old_namespace,old_title,old_text,old_comment," .
 838                   "old_user,old_user_text,old_timestamp,old_minor_edit,old_flags " .
 839                   "FROM old WHERE old_namespace={$ns} AND old_title='{$t}'";
 840                 wfQuery( $sql, DB_WRITE, $fname );
 841
 842                 # Now that it's safely backed up, delete it
 843
 844                 $sql = "DELETE FROM cur WHERE cur_namespace={$ns} AND " .
 845                   "cur_title='{$t}'";
 846                 wfQuery( $sql, DB_WRITE, $fname );
 847
 848                 $sql = "DELETE FROM old WHERE old_namespace={$ns} AND " .
 849                   "old_title='{$t}'";
 850                 wfQuery( $sql, DB_WRITE, $fname );
 851
 852                 $sql = "DELETE FROM recentchanges WHERE rc_namespace={$ns} AND " .
 853                   "rc_title='{$t}'";
 854                 wfQuery( $sql, DB_WRITE, $fname );
 855
 856                 # Finally, clean up the link tables
 857
 858                 if ( 0 != $id ) {
 859
 860                         $t = wfStrencode( $title->getPrefixedDBkey() );
 861
 862                         Article::onArticleDelete( $title );
 863
 864                         $sql = "SELECT l_from FROM links WHERE l_to={$id}";
 865                         $res = wfQuery( $sql, DB_READ, $fname );
 866
 867                         $sql = "INSERT INTO brokenlinks (bl_from,bl_to) VALUES ";
 868                         $now = wfTimestampNow();
 869                         $sql2 = "UPDATE cur SET cur_touched='{$now}' WHERE cur_id IN (";
 870                         $first = true;
 871
 872                         while ( $s = wfFetchObject( $res ) ) {
 873                                 $nt = Title::newFromDBkey( $s->l_from );
 874                                 $lid = $nt->getArticleID();
 875
 876                                 if ( ! $first ) { $sql .= ","; $sql2 .= ","; }
 877                                 $first = false;
 878                                 $sql .= "({$lid},'{$t}')";
 879                                 $sql2 .= "{$lid}";
 880                         }
 881                         $sql2 .= ")";
 882                         if ( ! $first ) {
 883                                 wfQuery( $sql, DB_WRITE, $fname );
 884                                 wfQuery( $sql2, DB_WRITE, $fname );
 885                         }
 886                         wfFreeResult( $res );
 887
 888                         $sql = "DELETE FROM links WHERE l_to={$id}";
 889                         wfQuery( $sql, DB_WRITE, $fname );
 890
 891                         $sql = "DELETE FROM links WHERE l_from='{$t}'";
 892                         wfQuery( $sql, DB_WRITE, $fname );
 893
 894                         $sql = "DELETE FROM imagelinks WHERE il_from='{$t}'";
 895                         wfQuery( $sql, DB_WRITE, $fname );
 896
 897                         $sql = "DELETE FROM brokenlinks WHERE bl_from={$id}";
 898                         wfQuery( $sql, DB_WRITE, $fname );
 899                 }
 900
 901                 $log = new LogPage( wfMsg( "dellogpage" ), wfMsg( "dellogpagetext" ) );
 902                 $art = $title->getPrefixedText();
 903                 $wpReason = wfCleanQueryVar( $wpReason );
 904                 $log->addEntry( wfMsg( "deletedarticle", $art ), $wpReason );
 905
 906                 # Clear the cached article id so the interface doesn't act like we exist
 907                 $this->mTitle->resetArticleID( 0 );
 908                 $this->mTitle->mArticleID = 0;
 909         }
 910
 911         function rollback()
 912         {
 913                 global $wgUser, $wgLang, $wgOut, $from;
 914
 915                 if ( ! $wgUser->isSysop() ) {
 916                         $wgOut->sysopRequired();
 917                         return;
 918                 }
 919                 if ( wfReadOnly() ) {
 920                         $wgOut->readOnlyPage( $this->getContent() );
 921                         return;
 922                 }
 923
 924                 # Secret enhanced rollback, marks edits rc_bot=1
 925                 $bot = !!$_REQUEST['bot'];
 926
 927                 # Replace all this user's current edits with the next one down
 928                 $tt = wfStrencode( $this->mTitle->getDBKey() );
 929                 $n = $this->mTitle->getNamespace();
 930
 931                 # Get the last editor
 932                 $sql = "SELECT cur_id,cur_user,cur_user_text,cur_comment FROM cur WHERE cur_title='{$tt}' AND cur_namespace={$n}";
 933                 $res = wfQuery( $sql, DB_READ );
 934                 if( ($x = wfNumRows( $res )) != 1 ) {
 935                         # Something wrong
 936                         $wgOut->addHTML( wfMsg( "notanarticle" ) );
 937                         return;
 938                 }
 939                 $s = wfFetchObject( $res );
 940                 $ut = wfStrencode( $s->cur_user_text );
 941                 $uid = $s->cur_user;
 942                 $pid = $s->cur_id;
 943
 944                 $from = str_replace( '_', ' ', wfCleanQueryVar( $from ) );
 945                 if( $from != $s->cur_user_text ) {
 946                         $wgOut->setPageTitle(wfmsg("rollbackfailed"));
 947                         $wgOut->addWikiText( wfMsg( "alreadyrolled",
 948                                 htmlspecialchars( $this->mTitle->getPrefixedText()),
 949                                 htmlspecialchars( $from ),
 950                                 htmlspecialchars( $s->cur_user_text ) ) );
 951                         if($s->cur_comment != "") {
 952                                 $wgOut->addHTML(
 953                                         wfMsg("editcomment",
 954                                         htmlspecialchars( $s->cur_comment ) ) );
 955                                 }
 956                         return;
 957                 }
 958
 959                 # Get the last edit not by this guy
 960                 $sql = "SELECT old_text,old_user,old_user_text,old_timestamp,old_flags
 961                 FROM old USE INDEX (name_title_timestamp)
 962                 WHERE old_namespace={$n} AND old_title='{$tt}'
 963                 AND (old_user <> {$uid} OR old_user_text <> '{$ut}')
 964                 ORDER BY inverse_timestamp LIMIT 1";
 965                 $res = wfQuery( $sql, DB_READ );
 966                 if( wfNumRows( $res ) != 1 ) {
 967                         # Something wrong
 968                         $wgOut->setPageTitle(wfMsg("rollbackfailed"));
 969                         $wgOut->addHTML( wfMsg( "cantrollback" ) );
 970                         return;
 971                 }
 972                 $s = wfFetchObject( $res );
 973
 974                 if ( $bot ) {
 975                         # Mark all reverted edits as bot
 976                         $sql = "UPDATE recentchanges SET rc_bot=1 WHERE
 977                                 rc_cur_id=$pid AND rc_user=$uid AND rc_timestamp > '{$s->old_timestamp}'";
 978                         wfQuery( $sql, DB_WRITE, $fname );
 979                 }
 980
 981                 # Save it!
 982                 $newcomment = wfMsg( "revertpage", $s->old_user_text );
 983                 $wgOut->setPagetitle( wfMsg( "actioncomplete" ) );
 984                 $wgOut->setRobotpolicy( "noindex,nofollow" );
 985                 $wgOut->addHTML( "<h2>" . $newcomment . "</h2>\n<hr>\n" );
 986                 $this->updateArticle( Article::getRevisionText( $s ), $newcomment, 1, $this->mTitle->userIsWatching(), "", $bot );
 987
 988                 Article::onArticleEdit( $this->mTitle );
 989                 $wgOut->returnToMain( false );
 990         }
 991
 992
 993         # Do standard deferred updates after page view
 994
 995         /* private */ function viewUpdates()
 996         {
 997                 global $wgDeferredUpdateList;
 998                 if ( 0 != $this->getID() ) {
 999                         global $wgDisableCounters;
1000                         if( !$wgDisableCounters ) {
1001                                 Article::incViewCount( $this->getID() );
1002                                 $u = new SiteStatsUpdate( 1, 0, 0 );
1003                                 array_push( $wgDeferredUpdateList, $u );
1004                         }
1005                         $u = new UserTalkUpdate( 0, $this->mTitle->getNamespace(),
1006                           $this->mTitle->getDBkey() );
1007                         array_push( $wgDeferredUpdateList, $u );
1008                 }
1009         }
1010
1011         # Do standard deferred updates after page edit.
1012         # Every 1000th edit, prune the recent changes table.
1013
1014         /* private */ function editUpdates( $text )
1015         {
1016                 global $wgDeferredUpdateList, $wgDBname, $wgMemc;
1017                 global $wgMessageCache;
1018
1019                 wfSeedRandom();
1020                 if ( 0 == mt_rand( 0, 999 ) ) {
1021                         $cutoff = wfUnix2Timestamp( time() - ( 7 * 86400 ) );
1022                         $sql = "DELETE FROM recentchanges WHERE rc_timestamp < '{$cutoff}'";
1023                         wfQuery( $sql, DB_WRITE );
1024                 }
1025                 $id = $this->getID();
1026                 $title = $this->mTitle->getPrefixedDBkey();
1027                 $shortTitle = $this->mTitle->getDBkey();
1028
1029                 $adj = $this->mCountAdjustment;
1030
1031                 if ( 0 != $id ) {
1032                         $u = new LinksUpdate( $id, $title );
1033                         array_push( $wgDeferredUpdateList, $u );
1034                         $u = new SiteStatsUpdate( 0, 1, $adj );
1035                         array_push( $wgDeferredUpdateList, $u );
1036                         $u = new SearchUpdate( $id, $title, $text );
1037                         array_push( $wgDeferredUpdateList, $u );
1038
1039                         $u = new UserTalkUpdate( 1, $this->mTitle->getNamespace(), $shortTitle );
1040                         array_push( $wgDeferredUpdateList, $u );
1041
1042                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
1043                                 $wgMessageCache->replace( $shortTitle, $text );
1044                         }
1045                 }
1046         }
1047
1048         /* private */ function setOldSubtitle()
1049         {
1050                 global $wgLang, $wgOut;
1051
1052                 $td = $wgLang->timeanddate( $this->mTimestamp, true );
1053                 $r = wfMsg( "revisionasof", $td );
1054                 $wgOut->setSubtitle( "({$r})" );
1055         }
1056
1057         # This function is called right before saving the wikitext,
1058         # so we can do things like signatures and links-in-context.
1059
1060         function preSaveTransform( $text )
1061         {
1062                 $s = "";
1063                 while ( "" != $text ) {
1064                         $p = preg_split( "/<\\s*nowiki\\s*>/i", $text, 2 );
1065                         $s .= $this->pstPass2( $p[0] );
1066
1067                         if ( ( count( $p ) < 2 ) || ( "" == $p[1] ) ) { $text = ""; }
1068                         else {
1069                                 $q = preg_split( "/<\\/\\s*nowiki\\s*>/i", $p[1], 2 );
1070                                 $s .= "<nowiki>{$q[0]}</nowiki>";
1071                                 $text = $q[1];
1072                         }
1073                 }
1074                 return rtrim( $s );
1075         }
1076
1077         /* private */ function pstPass2( $text )
1078         {
1079                 global $wgUser, $wgLang, $wgLocaltimezone;
1080
1081                 # Signatures
1082                 #
1083                 $n = $wgUser->getName();
1084                 $k = $wgUser->getOption( "nickname" );
1085                 if ( "" == $k ) { $k = $n; }
1086                 if(isset($wgLocaltimezone)) {
1087                         $oldtz = getenv("TZ"); putenv("TZ=$wgLocaltimezone");
1088                 }
1089                 /* Note: this is an ugly timezone hack for the European wikis */
1090                 $d = $wgLang->timeanddate( date( "YmdHis" ), false ) .
1091                   " (" . date( "T" ) . ")";
1092                 if(isset($wgLocaltimezone)) putenv("TZ=$oldtz");
1093
1094                 $text = preg_replace( "/~~~~/", "[[" . $wgLang->getNsText(
1095                   Namespace::getUser() ) . ":$n|$k]] $d", $text );
1096                 $text = preg_replace( "/~~~/", "[[" . $wgLang->getNsText(
1097                   Namespace::getUser() ) . ":$n|$k]]", $text );
1098
1099                 # Context links: [[|name]] and [[name (context)|]]
1100                 #
1101                 $tc = "[&;%\\-,.\\(\\)' _0-9A-Za-z\\/:\\x80-\\xff]";
1102                 $np = "[&;%\\-,.' _0-9A-Za-z\\/:\\x80-\\xff]"; # No parens
1103                 $namespacechar = '[ _0-9A-Za-z\x80-\xff]'; # Namespaces can use non-ascii!
1104                 $conpat = "/^({$np}+) \\(({$tc}+)\\)$/";
1105
1106                 $p1 = "/\[\[({$np}+) \\(({$np}+)\\)\\|]]/";             # [[page (context)|]]
1107                 $p2 = "/\[\[\\|({$tc}+)]]/";                                    # [[|page]]
1108                 $p3 = "/\[\[($namespacechar+):({$np}+)\\|]]/";          # [[namespace:page|]]
1109                 $p4 = "/\[\[($namespacechar+):({$np}+) \\(({$np}+)\\)\\|]]/";
1110                                                                                                                 # [[ns:page (cont)|]]
1111                 $context = "";
1112                 $t = $this->mTitle->getText();
1113                 if ( preg_match( $conpat, $t, $m ) ) {
1114                         $context = $m[2];
1115                 }
1116                 $text = preg_replace( $p4, "[[\\1:\\2 (\\3)|\\2]]", $text );
1117                 $text = preg_replace( $p1, "[[\\1 (\\2)|\\1]]", $text );
1118                 $text = preg_replace( $p3, "[[\\1:\\2|\\2]]", $text );
1119
1120                 if ( "" == $context ) {
1121                         $text = preg_replace( $p2, "[[\\1]]", $text );
1122                 } else {
1123                         $text = preg_replace( $p2, "[[\\1 ({$context})|\\1]]", $text );
1124                 }
1125
1126                 # {{SUBST:xxx}} variables
1127                 #
1128                 $mw =& MagicWord::get( MAG_SUBST );
1129                 $text = $mw->substituteCallback( $text, "wfReplaceSubstVar" );
1130
1131 /* Experimental:
1132                 # Trim trailing whitespace
1133                 # MAG_END (__END__) tag allows for trailing
1134                 # whitespace to be deliberately included
1135                 $text = rtrim( $text );
1136                 $mw =& MagicWord::get( MAG_END );
1137                 $mw->matchAndRemove( $text );
1138 */
1139                 return $text;
1140         }
1141
1142         /* Caching functions */
1143
1144         # checkLastModified returns true iff it has taken care of all
1145         # output to the client that is necessary for this request.
1146         # (that is, it has sent a cached version of the page)
1147         function tryFileCache() {
1148                 static $called = false;
1149                 if( $called ) {
1150                         wfDebug( " tryFileCache() -- called twice!?\n" );
1151                         return;
1152                 }
1153                 $called = true;
1154                 if($this->isFileCacheable()) {
1155                         $touched = $this->mTouched;
1156                         if( $this->mTitle->getPrefixedDBkey() == wfMsg( "mainpage" ) ) {
1157                                 # Expire the main page quicker
1158                                 $expire = wfUnix2Timestamp( time() - 3600 );
1159                                 $touched = max( $expire, $touched );
1160                         }
1161                         $cache = new CacheManager( $this->mTitle );
1162                         if($cache->isFileCacheGood( $touched )) {
1163                                 global $wgOut;
1164                                 wfDebug( " tryFileCache() - about to load\n" );
1165                                 $cache->loadFromFileCache();
1166                                 return true;
1167                         } else {
1168                                 wfDebug( " tryFileCache() - starting buffer\n" );
1169                                 if($cache->useGzip() && wfClientAcceptsGzip()) {
1170                                         /* For some reason, adding this header line over in
1171                                            CacheManager::saveToFileCache() fails on my test
1172                                            setup at home, though it works on the live install.
1173                                            Make double-sure...  --brion */
1174                                         header( "Content-Encoding: gzip" );
1175                                 }
1176                                 ob_start( array(&$cache, 'saveToFileCache' ) );
1177                         }
1178                 } else {
1179                         wfDebug( " tryFileCache() - not cacheable\n" );
1180                 }
1181         }
1182
1183         function isFileCacheable() {
1184                 global $wgUser, $wgUseFileCache, $wgShowIPinHeader;
1185                 global $action, $oldid, $diff, $redirect, $printable;
1186                 return $wgUseFileCache
1187                         and (!$wgShowIPinHeader)
1188                         and ($this->getID() != 0)
1189                         and ($wgUser->getId() == 0)
1190                         and (!$wgUser->getNewtalk())
1191                         and ($this->mTitle->getNamespace() != Namespace::getSpecial())
1192                         and ($action == "view")
1193                         and (!isset($oldid))
1194                         and (!isset($diff))
1195                         and (!isset($redirect))
1196                         and (!isset($printable))
1197                         and (!$this->mRedirectedFrom);
1198         }
1199
1200         function checkTouched() {
1201                 $id = $this->getID();
1202                 $sql = "SELECT cur_touched,cur_is_redirect FROM cur WHERE cur_id=$id";
1203                 $res = wfQuery( $sql, DB_READ, "Article::checkTouched" );
1204                 if( $s = wfFetchObject( $res ) ) {
1205                         $this->mTouched = $s->cur_touched;
1206                         return !$s->cur_is_redirect;
1207                 } else {
1208                         return false;
1209                 }
1210         }
1211
1212         /* static */ function incViewCount( $id )
1213         {
1214                 $id = intval( $id );
1215
1216                 # Not important enough to warrant an error page in case of failure
1217                 $oldignore = wfIgnoreSQLErrors( true );
1218
1219                 wfQuery("INSERT INTO hitcounter (hc_id) VALUES ({$id})", DB_WRITE);
1220
1221                 if( (rand() % 23 != 0) or (wfLastErrno() != 0) ){
1222                         # Most of the time (or on SQL errors), skip row count check
1223                         wfIgnoreSQLErrors( $oldignore );
1224                         return;
1225                 }
1226
1227                 $res = wfQuery("SELECT COUNT(*) as n FROM hitcounter", DB_WRITE);
1228                 $row = wfFetchObject( $res );
1229                 $rown = intval( $row->n );
1230                 if( $rown > 1000 ){ // update counters after ~1000 hits
1231                         wfProfileIn( "Article::incViewCount-collect" );
1232                         $old_user_abort = ignore_user_abort( true );
1233
1234                         wfQuery("LOCK TABLES hitcounter WRITE", DB_WRITE);
1235                         wfQuery("CREATE TEMPORARY TABLE acchits TYPE=HEAP ".
1236                                 "SELECT hc_id,COUNT(*) AS hc_n FROM hitcounter ".
1237                                 "GROUP BY hc_id", DB_WRITE);
1238                         wfQuery("DELETE FROM hitcounter", DB_WRITE);
1239                         wfQuery("UNLOCK TABLES", DB_WRITE);
1240                         wfQuery("UPDATE cur,acchits SET cur_counter=cur_counter + hc_n ".
1241                                 "WHERE cur_id = hc_id", DB_WRITE);
1242                         wfQuery("DROP TABLE acchits", DB_WRITE);
1243
1244                         ignore_user_abort( $old_user_abort );
1245                         wfProfileOut( "Article::incViewCount-collect" );
1246                 }
1247                 wfIgnoreSQLErrors( $oldignore );
1248         }
1249
1250         # The onArticle*() functions are supposed to be a kind of hooks
1251         # which should be called whenever any of the specified actions
1252         # are done.
1253         #
1254         # This is a good place to put code to clear caches, for instance.
1255
1256         /* static */ function onArticleCreate($title_obj){
1257                 global $wgEnablePersistentLC, $wgEnableParserCache;
1258                 if ( $wgEnablePersistentLC ) {
1259                         LinkCache::linksccClearBrokenLinksTo( $title_obj->getPrefixedDBkey() );
1260                 }
1261                 if ( $wgEnableParserCache ) {
1262                         OutputPage::parsercacheClearBrokenLinksTo( $title_obj->getPrefixedDBkey() );
1263                 }
1264         }
1265
1266         /* static */ function onArticleDelete($title_obj){
1267                 global $wgEnablePersistentLC, $wgEnableParserCache;
1268                 if ( $wgEnablePersistentLC ) {
1269                         LinkCache::linksccClearLinksTo( $title_obj->getArticleID() );
1270                 }
1271                 if ( $wgEnableParserCache ) {
1272                         OutputPage::parsercacheClearLinksTo( $title_obj->getArticleID() );
1273                 }
1274         }
1275
1276         /* static */ function onArticleEdit($title_obj){
1277                 global $wgEnablePersistentLC, $wgEnableParserCache;
1278                 if ( $wgEnablePersistentLC ) {
1279                         LinkCache::linksccClearPage( $title_obj->getArticleID() );
1280                 }
1281                 if ( $wgEnableParserCache ) {
1282                         OutputPage::parsercacheClearPage( $title_obj->getArticleID() );
1283                 }
1284         }
1285 }
1286
1287 function wfReplaceSubstVar( $matches ) {
1288         return wfMsg( $matches[1] );
1289 }
1290
1291 ?>