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