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