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                 global $wgEnablePersistentLC;
 373
 374                 $fname = "Article::insertNewArticle";
 375
 376                 $this->mCountAdjustment = $this->isCountable( $text );
 377
 378                 $ns = $this->mTitle->getNamespace();
 379                 $ttl = $this->mTitle->getDBkey();
 380                 $text = $this->preSaveTransform( $text );
 381                 if ( $wgMwRedir->matchStart( $text ) ) { $redir = 1; }
 382                 else { $redir = 0; }
 383
 384                 $now = wfTimestampNow();
 385                 $won = wfInvertTimestamp( $now );
 386                 wfSeedRandom();
 387                 $rand = number_format( mt_rand() / mt_getrandmax(), 12, ".", "" );
 388                 $sql = "INSERT INTO cur (cur_namespace,cur_title,cur_text," .
 389                   "cur_comment,cur_user,cur_timestamp,cur_minor_edit,cur_counter," .
 390                   "cur_restrictions,cur_user_text,cur_is_redirect," .
 391                   "cur_is_new,cur_random,cur_touched,inverse_timestamp) VALUES ({$ns},'" . wfStrencode( $ttl ) . "', '" .
 392                   wfStrencode( $text ) . "', '" .
 393                   wfStrencode( $summary ) . "', '" .
 394                   $wgUser->getID() . "', '{$now}', " .
 395                   ( $isminor ? 1 : 0 ) . ", 0, '', '" .
 396                   wfStrencode( $wgUser->getName() ) . "', $redir, 1, $rand, '{$now}', '{$won}')";
 397                 $res = wfQuery( $sql, DB_WRITE, $fname );
 398
 399                 $newid = wfInsertId();
 400                 $this->mTitle->resetArticleID( $newid );
 401
 402                 if ( $wgEnablePersistentLC ) {
 403                         // Purge related entries in links cache on new page, to heal broken links
 404                         $ptitle = wfStrencode( $ttl );
 405                         wfQuery("DELETE linkscc FROM linkscc,brokenlinks ".
 406                                 "WHERE lcc_pageid=bl_from AND bl_to='{$ptitle}'", DB_WRITE);
 407                 }
 408
 409                 $sql = "INSERT INTO recentchanges (rc_timestamp,rc_cur_time," .
 410                   "rc_namespace,rc_title,rc_new,rc_minor,rc_cur_id,rc_user," .
 411                   "rc_user_text,rc_comment,rc_this_oldid,rc_last_oldid,rc_bot) VALUES (" .
 412                   "'{$now}','{$now}',{$ns},'" . wfStrencode( $ttl ) . "',1," .
 413                   ( $isminor ? 1 : 0 ) . ",{$newid}," . $wgUser->getID() . ",'" .
 414                   wfStrencode( $wgUser->getName() ) . "','" .
 415                   wfStrencode( $summary ) . "',0,0," .
 416                   ( $wgUser->isBot() ? 1 : 0 ) . ")";
 417                 wfQuery( $sql, DB_WRITE, $fname );
 418                 if ($watchthis) {
 419                         if(!$this->mTitle->userIsWatching()) $this->watch();
 420                 } else {
 421                         if ( $this->mTitle->userIsWatching() ) {
 422                                 $this->unwatch();
 423                         }
 424                 }
 425
 426                 # The talk page isn't in the regular link tables, so we need to update manually:
 427                 $talkns = $ns ^ 1; # talk -> normal; normal -> talk
 428                 $sql = "UPDATE cur set cur_touched='$now' WHERE cur_namespace=$talkns AND cur_title='" . wfStrencode( $ttl ) . "'";
 429                 wfQuery( $sql, DB_WRITE );
 430
 431                 $this->showArticle( $text, wfMsg( "newarticle" ) );
 432         }
 433
 434         function updateArticle( $text, $summary, $minor, $watchthis, $section = "", $forceBot = false )
 435         {
 436                 global $wgOut, $wgUser, $wgLinkCache;
 437                 global $wgDBtransactions, $wgMwRedir;
 438                 $fname = "Article::updateArticle";
 439
 440                 $this->loadLastEdit();
 441
 442                 // insert updated section into old text if we have only edited part
 443                 // of the article
 444                 if ($section != "") {
 445                         $oldtext=$this->getContent();
 446                         if($section=="new") {
 447                                 if($summary) $subject="== {$summary} ==\n\n";
 448                                 $text=$oldtext."\n\n".$subject.$text;
 449                         } else {
 450                                 $secs=preg_split("/(^=+.*?=+|^<h[1-6].*?>.*?<\/h[1-6].*?>)/mi",
 451                                   $oldtext,-1,PREG_SPLIT_DELIM_CAPTURE);
 452                                 $secs[$section*2]=$text."\n\n"; // replace with edited
 453                                 if($section) { $secs[$section*2-1]=""; } // erase old headline
 454                                 $text=join("",$secs);
 455                         }
 456                 }
 457                 if ( $this->mMinorEdit ) { $me1 = 1; } else { $me1 = 0; }
 458                 if ( $minor ) { $me2 = 1; } else { $me2 = 0; }
 459                 if ( preg_match( "/^((" . $wgMwRedir->getBaseRegex() . ")[^\\n]+)/i", $text, $m ) ) {
 460                         $redir = 1;
 461                         $text = $m[1] . "\n"; # Remove all content but redirect
 462                 }
 463                 else { $redir = 0; }
 464
 465                 $text = $this->preSaveTransform( $text );
 466
 467                 # Update article, but only if changed.
 468
 469                 if( $wgDBtransactions ) {
 470                         $sql = "BEGIN";
 471                         wfQuery( $sql, DB_WRITE );
 472                 }
 473                 $oldtext = $this->getContent( true );
 474
 475                 if ( 0 != strcmp( $text, $oldtext ) ) {
 476                         $this->mCountAdjustment = $this->isCountable( $text )
 477                           - $this->isCountable( $oldtext );
 478
 479                         $now = wfTimestampNow();
 480                         $won = wfInvertTimestamp( $now );
 481                         $sql = "UPDATE cur SET cur_text='" . wfStrencode( $text ) .
 482                           "',cur_comment='" .  wfStrencode( $summary ) .
 483                           "',cur_minor_edit={$me2}, cur_user=" . $wgUser->getID() .
 484                           ",cur_timestamp='{$now}',cur_user_text='" .
 485                           wfStrencode( $wgUser->getName() ) .
 486                           "',cur_is_redirect={$redir}, cur_is_new=0, cur_touched='{$now}', inverse_timestamp='{$won}' " .
 487                           "WHERE cur_id=" . $this->getID() .
 488                           " AND cur_timestamp='" . $this->getTimestamp() . "'";
 489                         $res = wfQuery( $sql, DB_WRITE, $fname );
 490
 491                         if( wfAffectedRows() == 0 ) {
 492                                 /* Belated edit conflict! Run away!! */
 493                                 return false;
 494                         }
 495
 496                         # This overwrites $oldtext if revision compression is on
 497                         $flags = Article::compressRevisionText( $oldtext );
 498
 499                         $sql = "INSERT INTO old (old_namespace,old_title,old_text," .
 500                           "old_comment,old_user,old_user_text,old_timestamp," .
 501                           "old_minor_edit,inverse_timestamp,old_flags) VALUES (" .
 502                           $this->mTitle->getNamespace() . ", '" .
 503                           wfStrencode( $this->mTitle->getDBkey() ) . "', '" .
 504                           wfStrencode( $oldtext ) . "', '" .
 505                           wfStrencode( $this->getComment() ) . "', " .
 506                           $this->getUser() . ", '" .
 507                           wfStrencode( $this->getUserText() ) . "', '" .
 508                           $this->getTimestamp() . "', " . $me1 . ", '" .
 509                           wfInvertTimestamp( $this->getTimestamp() ) . "','$flags')";
 510                         $res = wfQuery( $sql, DB_WRITE, $fname );
 511                         $oldid = wfInsertID( $res );
 512
 513                         $bot = (int)($wgUser->isBot() || $forceBot);
 514
 515                         $sql = "INSERT INTO recentchanges (rc_timestamp,rc_cur_time," .
 516                           "rc_namespace,rc_title,rc_new,rc_minor,rc_bot,rc_cur_id,rc_user," .
 517                           "rc_user_text,rc_comment,rc_this_oldid,rc_last_oldid) VALUES (" .
 518                           "'{$now}','{$now}'," . $this->mTitle->getNamespace() . ",'" .
 519                           wfStrencode( $this->mTitle->getDBkey() ) . "',0,{$me2}," .
 520                           "$bot," . $this->getID() . "," . $wgUser->getID() . ",'" .
 521                           wfStrencode( $wgUser->getName() ) . "','" .
 522                           wfStrencode( $summary ) . "',0,{$oldid})";
 523                         wfQuery( $sql, DB_WRITE, $fname );
 524
 525                         $sql = "UPDATE recentchanges SET rc_this_oldid={$oldid} " .
 526                           "WHERE rc_namespace=" . $this->mTitle->getNamespace() . " AND " .
 527                           "rc_title='" . wfStrencode( $this->mTitle->getDBkey() ) . "' AND " .
 528                           "rc_timestamp='" . $this->getTimestamp() . "'";
 529                         wfQuery( $sql, DB_WRITE, $fname );
 530
 531                         $sql = "UPDATE recentchanges SET rc_cur_time='{$now}' " .
 532                           "WHERE rc_cur_id=" . $this->getID();
 533                         wfQuery( $sql, DB_WRITE, $fname );
 534
 535                         global $wgEnablePersistentLC;
 536                         if ( $wgEnablePersistentLC ) {
 537                                 // Purge link cache for this page
 538                                 $pageid=$this->getID();
 539                                 wfQuery("DELETE FROM linkscc WHERE lcc_pageid='{$pageid}'", DB_WRITE);
 540                         }
 541                 }
 542
 543                 if( $wgDBtransactions ) {
 544                         $sql = "COMMIT";
 545                         wfQuery( $sql, DB_WRITE );
 546                 }
 547
 548                 if ($watchthis) {
 549                         if (!$this->mTitle->userIsWatching()) $this->watch();
 550                 } else {
 551                         if ( $this->mTitle->userIsWatching() ) {
 552                                 $this->unwatch();
 553                         }
 554                 }
 555
 556                 $this->showArticle( $text, wfMsg( "updated" ) );
 557                 return true;
 558         }
 559
 560         # After we've either updated or inserted the article, update
 561         # the link tables and redirect to the new page.
 562
 563         function showArticle( $text, $subtitle )
 564         {
 565                 global $wgOut, $wgUser, $wgLinkCache;
 566                 global $wgMwRedir;
 567
 568                 $wgLinkCache = new LinkCache();
 569
 570                 # Get old version of link table to allow incremental link updates
 571                 $wgLinkCache->preFill( $this->mTitle );
 572                 $wgLinkCache->clear();
 573
 574                 # Now update the link cache by parsing the text
 575                 $wgOut = new OutputPage();
 576                 $wgOut->addWikiText( $text );
 577
 578                 $this->editUpdates( $text );
 579                 if( $wgMwRedir->matchStart( $text ) )
 580                         $r = "redirect=no";
 581                 else
 582                         $r = "";
 583                 $wgOut->redirect( wfLocalUrl( $this->mTitle->getPrefixedURL(), $r ) );
 584         }
 585
 586         # Add this page to my watchlist
 587
 588         function watch( $add = true )
 589         {
 590                 global $wgUser, $wgOut, $wgLang;
 591                 global $wgDeferredUpdateList;
 592
 593                 if ( 0 == $wgUser->getID() ) {
 594                         $wgOut->errorpage( "watchnologin", "watchnologintext" );
 595                         return;
 596                 }
 597                 if ( wfReadOnly() ) {
 598                         $wgOut->readOnlyPage();
 599                         return;
 600                 }
 601                 if( $add )
 602                         $wgUser->addWatch( $this->mTitle );
 603                 else
 604                         $wgUser->removeWatch( $this->mTitle );
 605
 606                 $wgOut->setPagetitle( wfMsg( $add ? "addedwatch" : "removedwatch" ) );
 607                 $wgOut->setRobotpolicy( "noindex,follow" );
 608
 609                 $sk = $wgUser->getSkin() ;
 610                 $link = $sk->makeKnownLink ( $this->mTitle->getPrefixedText() ) ;
 611
 612                 if($add)
 613                         $text = wfMsg( "addedwatchtext", $link );
 614                 else
 615                         $text = wfMsg( "removedwatchtext", $link );
 616                 $wgOut->addHTML( $text );
 617
 618                 $up = new UserUpdate();
 619                 array_push( $wgDeferredUpdateList, $up );
 620
 621                 $wgOut->returnToMain( false );
 622         }
 623
 624         function unwatch()
 625         {
 626                 $this->watch( false );
 627         }
 628
 629         function protect( $limit = "sysop" )
 630         {
 631                 global $wgUser, $wgOut;
 632
 633                 if ( ! $wgUser->isSysop() ) {
 634                         $wgOut->sysopRequired();
 635                         return;
 636                 }
 637                 if ( wfReadOnly() ) {
 638                         $wgOut->readOnlyPage();
 639                         return;
 640                 }
 641                 $id = $this->mTitle->getArticleID();
 642                 if ( 0 == $id ) {
 643                         $wgOut->fatalEror( wfMsg( "badarticleerror" ) );
 644                         return;
 645                 }
 646         $sql = "UPDATE cur SET cur_touched='" . wfTimestampNow() . "'," .
 647                         "cur_restrictions='{$limit}' WHERE cur_id={$id}";
 648                 wfQuery( $sql, DB_WRITE, "Article::protect" );
 649
 650                 $log = new LogPage( wfMsg( "protectlogpage" ), wfMsg( "protectlogtext" ) );
 651                 if ( $limit === "" ) {
 652                         $log->addEntry( wfMsg( "unprotectedarticle", $this->mTitle->getPrefixedText() ), "" );
 653                 } else {
 654                         $log->addEntry( wfMsg( "protectedarticle", $this->mTitle->getPrefixedText() ), "" );
 655                 }
 656                 $wgOut->redirect( wfLocalUrl( $this->mTitle->getPrefixedURL() ) );
 657         }
 658
 659         function unprotect()
 660         {
 661                 return $this->protect( "" );
 662         }
 663
 664         function delete()
 665         {
 666                 global $wgUser, $wgOut, $wgMessageCache;
 667                 global $wpConfirm, $wpReason, $image, $oldimage;
 668
 669                 # This code desperately needs to be totally rewritten
 670
 671                 if ( ( ! $wgUser->isSysop() ) ) {
 672                         $wgOut->sysopRequired();
 673                         return;
 674                 }
 675                 if ( wfReadOnly() ) {
 676                         $wgOut->readOnlyPage();
 677                         return;
 678                 }
 679
 680                 # Can't delete cached MediaWiki namespace (i.e. vital messages)
 681                 if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI && $wgMessageCache->isCacheable( $this->mTitle->getDBkey() ) ) {
 682                         $wgOut->fatalError( wfMsg( "cannotdelete" ) );
 683                         return;
 684                 }
 685
 686                 # Better double-check that it hasn't been deleted yet!
 687                 $wgOut->setPagetitle( wfMsg( "confirmdelete" ) );
 688                 if ( ( "" == trim( $this->mTitle->getText() ) )
 689                   or ( $this->mTitle->getArticleId() == 0 ) ) {
 690                         $wgOut->fatalError( wfMsg( "cannotdelete" ) );
 691                         return;
 692                 }
 693
 694                 if ( $_POST["wpConfirm"] ) {
 695                         $this->doDelete();
 696                         return;
 697                 }
 698
 699                 # determine whether this page has earlier revisions
 700                 # and insert a warning if it does
 701                 # we select the text because it might be useful below
 702                 $ns = $this->mTitle->getNamespace();
 703                 $title = $this->mTitle->getDBkey();
 704                 $etitle = wfStrencode( $title );
 705                 $sql = "SELECT old_text,old_flags FROM old WHERE old_namespace=$ns and old_title='$etitle' ORDER BY inverse_timestamp LIMIT 1";
 706                 $res = wfQuery( $sql, DB_READ, $fname );
 707                 if( ($old=wfFetchObject($res)) && !$wpConfirm ) {
 708                         $skin=$wgUser->getSkin();
 709                         $wgOut->addHTML("<B>".wfMsg("historywarning"));
 710                         $wgOut->addHTML( $skin->historyLink() ."</B><P>");
 711                 }
 712
 713                 $sql="SELECT cur_text FROM cur WHERE cur_namespace=$ns and cur_title='$etitle'";
 714                 $res=wfQuery($sql, DB_READ, $fname);
 715                 if( ($s=wfFetchObject($res))) {
 716
 717                         # if this is a mini-text, we can paste part of it into the deletion reason
 718
 719                         #if this is empty, an earlier revision may contain "useful" text
 720                         if($s->cur_text!="") {
 721                                 $text=$s->cur_text;
 722                         } else {
 723                                 if($old) {
 724                                         $text = Article::getRevisionText( $old );
 725                                         $blanked=1;
 726                                 }
 727
 728                         }
 729
 730                         $length=strlen($text);
 731
 732                         # this should not happen, since it is not possible to store an empty, new
 733                         # page. Let's insert a standard text in case it does, though
 734                         if($length==0 && !$wpReason) { $wpReason=wfmsg("exblank");}
 735
 736
 737                         if($length < 500 && !$wpReason) {
 738
 739                                 # comment field=255, let's grep the first 150 to have some user
 740                                 # space left
 741                                 $text=substr($text,0,150);
 742                                 # let's strip out newlines and HTML tags
 743                                 $text=preg_replace("/\"/","'",$text);
 744                                 $text=preg_replace("/\</","&lt;",$text);
 745                                 $text=preg_replace("/\>/","&gt;",$text);
 746                                 $text=preg_replace("/[\n\r]/","",$text);
 747                                 if(!$blanked) {
 748                                         $wpReason=wfMsg("excontent"). " '".$text;
 749                                 } else {
 750                                         $wpReason=wfMsg("exbeforeblank") . " '".$text;
 751                                 }
 752                                 if($length>150) { $wpReason .= "..."; } # we've only pasted part of the text
 753                                 $wpReason.="'";
 754                         }
 755                 }
 756
 757                 return $this->confirmDelete();
 758         }
 759
 760         function confirmDelete( $par = "" )
 761         {
 762                 global $wgOut;
 763                 global $wpReason;
 764
 765                 wfDebug( "Article::confirmDelete\n" );
 766
 767                 $sub = htmlspecialchars( $this->mTitle->getPrefixedText() );
 768                 $wgOut->setSubtitle( wfMsg( "deletesub", $sub ) );
 769                 $wgOut->setRobotpolicy( "noindex,nofollow" );
 770                 $wgOut->addWikiText( wfMsg( "confirmdeletetext" ) );
 771
 772                 $t = $this->mTitle->getPrefixedURL();
 773
 774                 $formaction = wfEscapeHTML( wfLocalUrl( $t, "action=delete" . $par ) );
 775                 $confirm = wfMsg( "confirm" );
 776                 $check = wfMsg( "confirmcheck" );
 777                 $delcom = wfMsg( "deletecomment" );
 778
 779                 $wgOut->addHTML( "
 780 <form id=\"deleteconfirm\" method=\"post\" action=\"{$formaction}\">
 781 <table border=0><tr><td align=right>
 782 {$delcom}:</td><td align=left>
 783 <input type=text size=60 name=\"wpReason\" value=\"" . htmlspecialchars( $wpReason ) . "\">
 784 </td></tr><tr><td>&nbsp;</td></tr>
 785 <tr><td align=right>
 786 <input type=checkbox name=\"wpConfirm\" value='1' id=\"wpConfirm\">
 787 </td><td><label for=\"wpConfirm\">{$check}</label></td>
 788 </tr><tr><td>&nbsp;</td><td>
 789 <input type=submit name=\"wpConfirmB\" value=\"{$confirm}\">
 790 </td></tr></table></form>\n" );
 791
 792                 $wgOut->returnToMain( false );
 793         }
 794
 795         function doDelete()
 796         {
 797                 global $wgOut, $wgUser, $wgLang;
 798                 global $wpReason;
 799                 $fname = "Article::doDelete";
 800                 wfDebug( "$fname\n" );
 801
 802                 $this->doDeleteArticle( $this->mTitle );
 803                 $deleted = $this->mTitle->getPrefixedText();
 804
 805                 $wgOut->setPagetitle( wfMsg( "actioncomplete" ) );
 806                 $wgOut->setRobotpolicy( "noindex,nofollow" );
 807
 808                 $sk = $wgUser->getSkin();
 809                 $loglink = $sk->makeKnownLink( $wgLang->getNsText(
 810                   Namespace::getWikipedia() ) .
 811                   ":" . wfMsg( "dellogpage" ), wfMsg( "deletionlog" ) );
 812
 813                 $text = wfMsg( "deletedtext", $deleted, $loglink );
 814
 815                 $wgOut->addHTML( "<p>" . $text );
 816                 $wgOut->returnToMain( false );
 817         }
 818
 819         function doDeleteArticle( $title )
 820         {
 821                 global $wgUser, $wgOut, $wgLang, $wpReason, $wgDeferredUpdateList,
 822                         $wgEnablePersistentLC;
 823
 824                 $fname = "Article::doDeleteArticle";
 825                 wfDebug( "$fname\n" );
 826
 827                 $ns = $title->getNamespace();
 828                 $t = wfStrencode( $title->getDBkey() );
 829                 $id = $title->getArticleID();
 830
 831                 if ( "" == $t ) {
 832                         $wgOut->fatalError( wfMsg( "cannotdelete" ) );
 833                         return;
 834                 }
 835
 836                 $u = new SiteStatsUpdate( 0, 1, -$this->isCountable( $this->getContent( true ) ) );
 837                 array_push( $wgDeferredUpdateList, $u );
 838
 839                 # Move article and history to the "archive" table
 840                 $sql = "INSERT INTO archive (ar_namespace,ar_title,ar_text," .
 841                   "ar_comment,ar_user,ar_user_text,ar_timestamp,ar_minor_edit," .
 842                   "ar_flags) SELECT cur_namespace,cur_title,cur_text,cur_comment," .
 843                   "cur_user,cur_user_text,cur_timestamp,cur_minor_edit,0 FROM cur " .
 844                   "WHERE cur_namespace={$ns} AND cur_title='{$t}'";
 845                 wfQuery( $sql, DB_WRITE, $fname );
 846
 847                 $sql = "INSERT INTO archive (ar_namespace,ar_title,ar_text," .
 848                   "ar_comment,ar_user,ar_user_text,ar_timestamp,ar_minor_edit," .
 849                   "ar_flags) SELECT old_namespace,old_title,old_text,old_comment," .
 850                   "old_user,old_user_text,old_timestamp,old_minor_edit,old_flags " .
 851                   "FROM old WHERE old_namespace={$ns} AND old_title='{$t}'";
 852                 wfQuery( $sql, DB_WRITE, $fname );
 853
 854                 # Now that it's safely backed up, delete it
 855
 856                 $sql = "DELETE FROM cur WHERE cur_namespace={$ns} AND " .
 857                   "cur_title='{$t}'";
 858                 wfQuery( $sql, DB_WRITE, $fname );
 859
 860                 $sql = "DELETE FROM old WHERE old_namespace={$ns} AND " .
 861                   "old_title='{$t}'";
 862                 wfQuery( $sql, DB_WRITE, $fname );
 863
 864                 $sql = "DELETE FROM recentchanges WHERE rc_namespace={$ns} AND " .
 865                   "rc_title='{$t}'";
 866                 wfQuery( $sql, DB_WRITE, $fname );
 867
 868                 # Finally, clean up the link tables
 869
 870                 if ( 0 != $id ) {
 871
 872                         $t = wfStrencode( $title->getPrefixedDBkey() );
 873
 874                         if ( $wgEnablePersistentLC ) {
 875                                 // Purge related entries in links cache on delete,
 876                                 wfQuery("DELETE linkscc FROM linkscc,links ".
 877                                         "WHERE lcc_title=links.l_from AND l_to={$id}", DB_WRITE);
 878                                 wfQuery("DELETE FROM linkscc WHERE lcc_title='{$t}'", DB_WRITE);
 879                         }
 880
 881                         $sql = "SELECT l_from FROM links WHERE l_to={$id}";
 882                         $res = wfQuery( $sql, DB_READ, $fname );
 883
 884                         $sql = "INSERT INTO brokenlinks (bl_from,bl_to) VALUES ";
 885                         $now = wfTimestampNow();
 886                         $sql2 = "UPDATE cur SET cur_touched='{$now}' WHERE cur_id IN (";
 887                         $first = true;
 888
 889                         while ( $s = wfFetchObject( $res ) ) {
 890                                 $nt = Title::newFromDBkey( $s->l_from );
 891                                 $lid = $nt->getArticleID();
 892
 893                                 if ( ! $first ) { $sql .= ","; $sql2 .= ","; }
 894                                 $first = false;
 895                                 $sql .= "({$lid},'{$t}')";
 896                                 $sql2 .= "{$lid}";
 897                         }
 898                         $sql2 .= ")";
 899                         if ( ! $first ) {
 900                                 wfQuery( $sql, DB_WRITE, $fname );
 901                                 wfQuery( $sql2, DB_WRITE, $fname );
 902                         }
 903                         wfFreeResult( $res );
 904
 905                         $sql = "DELETE FROM links WHERE l_to={$id}";
 906                         wfQuery( $sql, DB_WRITE, $fname );
 907
 908                         $sql = "DELETE FROM links WHERE l_from='{$t}'";
 909                         wfQuery( $sql, DB_WRITE, $fname );
 910
 911                         $sql = "DELETE FROM imagelinks WHERE il_from='{$t}'";
 912                         wfQuery( $sql, DB_WRITE, $fname );
 913
 914                         $sql = "DELETE FROM brokenlinks WHERE bl_from={$id}";
 915                         wfQuery( $sql, DB_WRITE, $fname );
 916                 }
 917
 918                 $log = new LogPage( wfMsg( "dellogpage" ), wfMsg( "dellogpagetext" ) );
 919                 $art = $title->getPrefixedText();
 920                 $wpReason = wfCleanQueryVar( $wpReason );
 921                 $log->addEntry( wfMsg( "deletedarticle", $art ), $wpReason );
 922
 923                 # Clear the cached article id so the interface doesn't act like we exist
 924                 $this->mTitle->resetArticleID( 0 );
 925                 $this->mTitle->mArticleID = 0;
 926         }
 927
 928         function rollback()
 929         {
 930                 global $wgUser, $wgLang, $wgOut, $from;
 931
 932                 if ( ! $wgUser->isSysop() ) {
 933                         $wgOut->sysopRequired();
 934                         return;
 935                 }
 936                 if ( wfReadOnly() ) {
 937                         $wgOut->readOnlyPage( $this->getContent() );
 938                         return;
 939                 }
 940
 941                 # Secret enhanced rollback, marks edits rc_bot=1
 942                 $bot = !!$_REQUEST['bot'];
 943
 944                 # Replace all this user's current edits with the next one down
 945                 $tt = wfStrencode( $this->mTitle->getDBKey() );
 946                 $n = $this->mTitle->getNamespace();
 947
 948                 # Get the last editor
 949                 $sql = "SELECT cur_id,cur_user,cur_user_text,cur_comment FROM cur WHERE cur_title='{$tt}' AND cur_namespace={$n}";
 950                 $res = wfQuery( $sql, DB_READ );
 951                 if( ($x = wfNumRows( $res )) != 1 ) {
 952                         # Something wrong
 953                         $wgOut->addHTML( wfMsg( "notanarticle" ) );
 954                         return;
 955                 }
 956                 $s = wfFetchObject( $res );
 957                 $ut = wfStrencode( $s->cur_user_text );
 958                 $uid = $s->cur_user;
 959                 $pid = $s->cur_id;
 960
 961                 $from = str_replace( '_', ' ', wfCleanQueryVar( $from ) );
 962                 if( $from != $s->cur_user_text ) {
 963                         $wgOut->setPageTitle(wfmsg("rollbackfailed"));
 964                         $wgOut->addWikiText( wfMsg( "alreadyrolled",
 965                                 htmlspecialchars( $this->mTitle->getPrefixedText()),
 966                                 htmlspecialchars( $from ),
 967                                 htmlspecialchars( $s->cur_user_text ) ) );
 968                         if($s->cur_comment != "") {
 969                                 $wgOut->addHTML(
 970                                         wfMsg("editcomment",
 971                                         htmlspecialchars( $s->cur_comment ) ) );
 972                                 }
 973                         return;
 974                 }
 975
 976                 # Get the last edit not by this guy
 977                 $sql = "SELECT old_text,old_user,old_user_text,old_timestamp,old_flags
 978                 FROM old USE INDEX (name_title_timestamp)
 979                 WHERE old_namespace={$n} AND old_title='{$tt}'
 980                 AND (old_user <> {$uid} OR old_user_text <> '{$ut}')
 981                 ORDER BY inverse_timestamp LIMIT 1";
 982                 $res = wfQuery( $sql, DB_READ );
 983                 if( wfNumRows( $res ) != 1 ) {
 984                         # Something wrong
 985                         $wgOut->setPageTitle(wfMsg("rollbackfailed"));
 986                         $wgOut->addHTML( wfMsg( "cantrollback" ) );
 987                         return;
 988                 }
 989                 $s = wfFetchObject( $res );
 990
 991                 if ( $bot ) {
 992                         # Mark all reverted edits as bot
 993                         $sql = "UPDATE recentchanges SET rc_bot=1 WHERE
 994                                 rc_cur_id=$pid AND rc_user=$uid AND rc_timestamp > '{$s->old_timestamp}'";
 995                         wfQuery( $sql, DB_WRITE, $fname );
 996                 }
 997
 998                 # Save it!
 999                 $newcomment = wfMsg( "revertpage", $s->old_user_text );
1000                 $wgOut->setPagetitle( wfMsg( "actioncomplete" ) );
1001                 $wgOut->setRobotpolicy( "noindex,nofollow" );
1002                 $wgOut->addHTML( "<h2>" . $newcomment . "</h2>\n<hr>\n" );
1003                 $this->updateArticle( Article::getRevisionText( $s ), $newcomment, 1, $this->mTitle->userIsWatching(), "", $bot );
1004
1005                 global $wgEnablePersistentLC;
1006                 if ( $wgEnablePersistentLC ) {
1007                         wfQuery("DELETE FROM linkscc WHERE lcc_pageid='{$pid}'", DB_WRITE);
1008                 }
1009
1010
1011                 $wgOut->returnToMain( false );
1012         }
1013
1014
1015         # Do standard deferred updates after page view
1016
1017         /* private */ function viewUpdates()
1018         {
1019                 global $wgDeferredUpdateList;
1020                 if ( 0 != $this->getID() ) {
1021                         global $wgDisableCounters;
1022                         if( !$wgDisableCounters ) {
1023                                 Article::incViewCount( $this->getID() );
1024                                 $u = new SiteStatsUpdate( 1, 0, 0 );
1025                                 array_push( $wgDeferredUpdateList, $u );
1026                         }
1027                         $u = new UserTalkUpdate( 0, $this->mTitle->getNamespace(),
1028                           $this->mTitle->getDBkey() );
1029                         array_push( $wgDeferredUpdateList, $u );
1030                 }
1031         }
1032
1033         # Do standard deferred updates after page edit.
1034         # Every 1000th edit, prune the recent changes table.
1035
1036         /* private */ function editUpdates( $text )
1037         {
1038                 global $wgDeferredUpdateList, $wgDBname, $wgMemc;
1039                 global $wgMessageCache;
1040
1041                 wfSeedRandom();
1042                 if ( 0 == mt_rand( 0, 999 ) ) {
1043                         $cutoff = wfUnix2Timestamp( time() - ( 7 * 86400 ) );
1044                         $sql = "DELETE FROM recentchanges WHERE rc_timestamp < '{$cutoff}'";
1045                         wfQuery( $sql, DB_WRITE );
1046                 }
1047                 $id = $this->getID();
1048                 $title = $this->mTitle->getPrefixedDBkey();
1049                 $shortTitle = $this->mTitle->getDBkey();
1050
1051                 $adj = $this->mCountAdjustment;
1052
1053                 if ( 0 != $id ) {
1054                         $u = new LinksUpdate( $id, $title );
1055                         array_push( $wgDeferredUpdateList, $u );
1056                         $u = new SiteStatsUpdate( 0, 1, $adj );
1057                         array_push( $wgDeferredUpdateList, $u );
1058                         $u = new SearchUpdate( $id, $title, $text );
1059                         array_push( $wgDeferredUpdateList, $u );
1060
1061                         $u = new UserTalkUpdate( 1, $this->mTitle->getNamespace(), $shortTitle );
1062                         array_push( $wgDeferredUpdateList, $u );
1063
1064                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
1065                                 $wgMessageCache->replace( $shortTitle, $text );
1066                         }
1067                 }
1068         }
1069
1070         /* private */ function setOldSubtitle()
1071         {
1072                 global $wgLang, $wgOut;
1073
1074                 $td = $wgLang->timeanddate( $this->mTimestamp, true );
1075                 $r = wfMsg( "revisionasof", $td );
1076                 $wgOut->setSubtitle( "({$r})" );
1077         }
1078
1079         # This function is called right before saving the wikitext,
1080         # so we can do things like signatures and links-in-context.
1081
1082         function preSaveTransform( $text )
1083         {
1084                 $s = "";
1085                 while ( "" != $text ) {
1086                         $p = preg_split( "/<\\s*nowiki\\s*>/i", $text, 2 );
1087                         $s .= $this->pstPass2( $p[0] );
1088
1089                         if ( ( count( $p ) < 2 ) || ( "" == $p[1] ) ) { $text = ""; }
1090                         else {
1091                                 $q = preg_split( "/<\\/\\s*nowiki\\s*>/i", $p[1], 2 );
1092                                 $s .= "<nowiki>{$q[0]}</nowiki>";
1093                                 $text = $q[1];
1094                         }
1095                 }
1096                 return rtrim( $s );
1097         }
1098
1099         /* private */ function pstPass2( $text )
1100         {
1101                 global $wgUser, $wgLang, $wgLocaltimezone;
1102
1103                 # Signatures
1104                 #
1105                 $n = $wgUser->getName();
1106                 $k = $wgUser->getOption( "nickname" );
1107                 if ( "" == $k ) { $k = $n; }
1108                 if(isset($wgLocaltimezone)) {
1109                         $oldtz = getenv("TZ"); putenv("TZ=$wgLocaltimezone");
1110                 }
1111                 /* Note: this is an ugly timezone hack for the European wikis */
1112                 $d = $wgLang->timeanddate( date( "YmdHis" ), false ) .
1113                   " (" . date( "T" ) . ")";
1114                 if(isset($wgLocaltimezone)) putenv("TZ=$oldtz");
1115
1116                 $text = preg_replace( "/~~~~/", "[[" . $wgLang->getNsText(
1117                   Namespace::getUser() ) . ":$n|$k]] $d", $text );
1118                 $text = preg_replace( "/~~~/", "[[" . $wgLang->getNsText(
1119                   Namespace::getUser() ) . ":$n|$k]]", $text );
1120
1121                 # Context links: [[|name]] and [[name (context)|]]
1122                 #
1123                 $tc = "[&;%\\-,.\\(\\)' _0-9A-Za-z\\/:\\x80-\\xff]";
1124                 $np = "[&;%\\-,.' _0-9A-Za-z\\/:\\x80-\\xff]"; # No parens
1125                 $namespacechar = '[ _0-9A-Za-z\x80-\xff]'; # Namespaces can use non-ascii!
1126                 $conpat = "/^({$np}+) \\(({$tc}+)\\)$/";
1127
1128                 $p1 = "/\[\[({$np}+) \\(({$np}+)\\)\\|]]/";             # [[page (context)|]]
1129                 $p2 = "/\[\[\\|({$tc}+)]]/";                                    # [[|page]]
1130                 $p3 = "/\[\[($namespacechar+):({$np}+)\\|]]/";          # [[namespace:page|]]
1131                 $p4 = "/\[\[($namespacechar+):({$np}+) \\(({$np}+)\\)\\|]]/";
1132                                                                                                                 # [[ns:page (cont)|]]
1133                 $context = "";
1134                 $t = $this->mTitle->getText();
1135                 if ( preg_match( $conpat, $t, $m ) ) {
1136                         $context = $m[2];
1137                 }
1138                 $text = preg_replace( $p4, "[[\\1:\\2 (\\3)|\\2]]", $text );
1139                 $text = preg_replace( $p1, "[[\\1 (\\2)|\\1]]", $text );
1140                 $text = preg_replace( $p3, "[[\\1:\\2|\\2]]", $text );
1141
1142                 if ( "" == $context ) {
1143                         $text = preg_replace( $p2, "[[\\1]]", $text );
1144                 } else {
1145                         $text = preg_replace( $p2, "[[\\1 ({$context})|\\1]]", $text );
1146                 }
1147
1148                 # {{SUBST:xxx}} variables
1149                 #
1150                 $mw =& MagicWord::get( MAG_SUBST );
1151                 $text = $mw->substituteCallback( $text, "wfReplaceSubstVar" );
1152
1153 /* Experimental:
1154                 # Trim trailing whitespace
1155                 # MAG_END (__END__) tag allows for trailing
1156                 # whitespace to be deliberately included
1157                 $text = rtrim( $text );
1158                 $mw =& MagicWord::get( MAG_END );
1159                 $mw->matchAndRemove( $text );
1160 */
1161                 return $text;
1162         }
1163
1164         /* Caching functions */
1165
1166         # checkLastModified returns true iff it has taken care of all
1167         # output to the client that is necessary for this request.
1168         # (that is, it has sent a cached version of the page)
1169         function tryFileCache() {
1170                 static $called = false;
1171                 if( $called ) {
1172                         wfDebug( " tryFileCache() -- called twice!?\n" );
1173                         return;
1174                 }
1175                 $called = true;
1176                 if($this->isFileCacheable()) {
1177                         $touched = $this->mTouched;
1178                         if( $this->mTitle->getPrefixedDBkey() == wfMsg( "mainpage" ) ) {
1179                                 # Expire the main page quicker
1180                                 $expire = wfUnix2Timestamp( time() - 3600 );
1181                                 $touched = max( $expire, $touched );
1182                         }
1183                         $cache = new CacheManager( $this->mTitle );
1184                         if($cache->isFileCacheGood( $touched )) {
1185                                 global $wgOut;
1186                                 wfDebug( " tryFileCache() - about to load\n" );
1187                                 $cache->loadFromFileCache();
1188                                 return true;
1189                         } else {
1190                                 wfDebug( " tryFileCache() - starting buffer\n" );
1191                                 if($cache->useGzip() && wfClientAcceptsGzip()) {
1192                                         /* For some reason, adding this header line over in
1193                                            CacheManager::saveToFileCache() fails on my test
1194                                            setup at home, though it works on the live install.
1195                                            Make double-sure...  --brion */
1196                                         header( "Content-Encoding: gzip" );
1197                                 }
1198                                 ob_start( array(&$cache, 'saveToFileCache' ) );
1199                         }
1200                 } else {
1201                         wfDebug( " tryFileCache() - not cacheable\n" );
1202                 }
1203         }
1204
1205         function isFileCacheable() {
1206                 global $wgUser, $wgUseFileCache, $wgShowIPinHeader;
1207                 global $action, $oldid, $diff, $redirect, $printable;
1208                 return $wgUseFileCache
1209                         and (!$wgShowIPinHeader)
1210                         and ($this->getID() != 0)
1211                         and ($wgUser->getId() == 0)
1212                         and (!$wgUser->getNewtalk())
1213                         and ($this->mTitle->getNamespace != Namespace::getSpecial())
1214                         and ($action == "view")
1215                         and (!isset($oldid))
1216                         and (!isset($diff))
1217                         and (!isset($redirect))
1218                         and (!isset($printable))
1219                         and (!$this->mRedirectedFrom);
1220         }
1221
1222         function checkTouched() {
1223                 $id = $this->getID();
1224                 $sql = "SELECT cur_touched,cur_is_redirect FROM cur WHERE cur_id=$id";
1225                 $res = wfQuery( $sql, DB_READ, "Article::checkTouched" );
1226                 if( $s = wfFetchObject( $res ) ) {
1227                         $this->mTouched = $s->cur_touched;
1228                         return !$s->cur_is_redirect;
1229                 } else {
1230                         return false;
1231                 }
1232         }
1233
1234         /* static */ function incViewCount( $id )
1235         {
1236                 $id = intval( $id );
1237
1238                 # Not important enough to warrant an error page in case of failure
1239                 $oldignore = wfIgnoreSQLErrors( true );
1240
1241                 wfQuery("INSERT INTO hitcounter (hc_id) VALUES ({$id})", DB_WRITE);
1242
1243                 if( (rand() % 23 != 0) or (wfLastErrno() != 0) ){
1244                         # Most of the time (or on SQL errors), skip row count check
1245                         wfIgnoreSQLErrors( $oldignore );
1246                         return;
1247                 }
1248
1249                 $res = wfQuery("SELECT COUNT(*) as n FROM hitcounter", DB_WRITE);
1250                 $row = wfFetchObject( $res );
1251                 $rown = intval( $row->n );
1252                 if( $rown > 1000 ){ // update counters after ~1000 hits
1253                         wfProfileIn( "Article::incViewCount-collect" );
1254                         $old_user_abort = ignore_user_abort( true );
1255
1256                         wfQuery("LOCK TABLES hitcounter WRITE", DB_WRITE);
1257                         wfQuery("CREATE TEMPORARY TABLE acchits TYPE=HEAP ".
1258                                 "SELECT hc_id,COUNT(*) AS hc_n FROM hitcounter ".
1259                                 "GROUP BY hc_id", DB_WRITE);
1260                         wfQuery("DELETE FROM hitcounter", DB_WRITE);
1261                         wfQuery("UNLOCK TABLES", DB_WRITE);
1262                         wfQuery("UPDATE cur,acchits SET cur_counter=cur_counter + hc_n ".
1263                                 "WHERE cur_id = hc_id", DB_WRITE);
1264                         wfQuery("DROP TABLE acchits", DB_WRITE);
1265
1266                         ignore_user_abort( $old_user_abort );
1267                         wfProfileOut( "Article::incViewCount-collect" );
1268                 }
1269                 wfIgnoreSQLErrors( $oldignore );
1270         }
1271 }
1272
1273 function wfReplaceSubstVar( $matches ) {
1274         return wfMsg( $matches[1] );
1275 }
1276
1277 ?>