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