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