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                 $sql = "INSERT INTO recentchanges (rc_timestamp,rc_cur_time," .
 342                   "rc_namespace,rc_title,rc_new,rc_minor,rc_cur_id,rc_user," .
 343                   "rc_user_text,rc_comment,rc_this_oldid,rc_last_oldid,rc_bot) VALUES (" .
 344                   "'{$now}','{$now}',{$ns},'" . wfStrencode( $ttl ) . "',1," .
 345                   ( $isminor ? 1 : 0 ) . ",{$newid}," . $wgUser->getID() . ",'" .
 346                   wfStrencode( $wgUser->getName() ) . "','" .
 347                   wfStrencode( $summary ) . "',0,0," .
 348                   ( $wgUser->isBot() ? 1 : 0 ) . ")";
 349                 wfQuery( $sql, DB_WRITE, $fname );
 350                 if ($watchthis) {
 351                         if(!$this->mTitle->userIsWatching()) $this->watch();
 352                 } else {
 353                         if ( $this->mTitle->userIsWatching() ) {
 354                                 $this->unwatch();
 355                         }
 356                 }
 357
 358                 $this->showArticle( $text, wfMsg( "newarticle" ) );
 359         }
 360
 361         function updateArticle( $text, $summary, $minor, $watchthis, $section="" )
 362         {
 363                 global $wgOut, $wgUser, $wgLinkCache;
 364                 global $wgDBtransactions, $wgMwRedir;
 365                 $fname = "Article::updateArticle";
 366
 367                 $this->loadLastEdit();
 368
 369                 // insert updated section into old text if we have only edited part
 370                 // of the article
 371                 if ($section != "") {
 372                         $oldtext=$this->getContent();
 373                         if($section=="new") {
 374                                 if($summary) $subject="== {$summary} ==\n\n";
 375                                 $text=$oldtext."\n\n".$subject.$text;
 376                         } else {
 377                                 $secs=preg_split("/(^=+.*?=+|^<h[1-6].*?>.*?<\/h[1-6].*?>)/mi",
 378                                   $oldtext,-1,PREG_SPLIT_DELIM_CAPTURE);
 379                                 $secs[$section*2]=$text."\n\n"; // replace with edited
 380                                 if($section) { $secs[$section*2-1]=""; } // erase old headline
 381                                 $text=join("",$secs);
 382                         }
 383                 }
 384                 if ( $this->mMinorEdit ) { $me1 = 1; } else { $me1 = 0; }
 385                 if ( $minor ) { $me2 = 1; } else { $me2 = 0; }
 386                 if ( preg_match( "/^((" . $wgMwRedir->getBaseRegex() . ")[^\\n]+)/i", $text, $m ) ) {
 387                         $redir = 1;
 388                         $text = $m[1] . "\n"; # Remove all content but redirect
 389                 }
 390                 else { $redir = 0; }
 391
 392                 $text = $this->preSaveTransform( $text );
 393
 394                 # Update article, but only if changed.
 395
 396                 if( $wgDBtransactions ) {
 397                         $sql = "BEGIN";
 398                         wfQuery( $sql, DB_WRITE );
 399                 }
 400                 $oldtext = $this->getContent( true );
 401
 402                 if ( 0 != strcmp( $text, $oldtext ) ) {
 403                         $this->mCountAdjustment = $this->isCountable( $text )
 404                           - $this->isCountable( $oldtext );
 405
 406                         $now = wfTimestampNow();
 407                         $won = wfInvertTimestamp( $now );
 408                         $sql = "UPDATE cur SET cur_text='" . wfStrencode( $text ) .
 409                           "',cur_comment='" .  wfStrencode( $summary ) .
 410                           "',cur_minor_edit={$me2}, cur_user=" . $wgUser->getID() .
 411                           ",cur_timestamp='{$now}',cur_user_text='" .
 412                           wfStrencode( $wgUser->getName() ) .
 413                           "',cur_is_redirect={$redir}, cur_is_new=0, cur_touched='{$now}', inverse_timestamp='{$won}' " .
 414                           "WHERE cur_id=" . $this->getID() .
 415                           " AND cur_timestamp='" . $this->getTimestamp() . "'";
 416                         $res = wfQuery( $sql, DB_WRITE, $fname );
 417
 418                         if( wfAffectedRows() == 0 ) {
 419                                 /* Belated edit conflict! Run away!! */
 420                                 return false;
 421                         }
 422
 423                         $sql = "INSERT INTO old (old_namespace,old_title,old_text," .
 424                           "old_comment,old_user,old_user_text,old_timestamp," .
 425                           "old_minor_edit,inverse_timestamp) VALUES (" .
 426                           $this->mTitle->getNamespace() . ", '" .
 427                           wfStrencode( $this->mTitle->getDBkey() ) . "', '" .
 428                           wfStrencode( $oldtext ) . "', '" .
 429                           wfStrencode( $this->getComment() ) . "', " .
 430                           $this->getUser() . ", '" .
 431                           wfStrencode( $this->getUserText() ) . "', '" .
 432                           $this->getTimestamp() . "', " . $me1 . ", '" .
 433                           wfInvertTimestamp( $this->getTimestamp() ) . "')";
 434                         $res = wfQuery( $sql, DB_WRITE, $fname );
 435                         $oldid = wfInsertID( $res );
 436
 437                         $sql = "INSERT INTO recentchanges (rc_timestamp,rc_cur_time," .
 438                           "rc_namespace,rc_title,rc_new,rc_minor,rc_bot,rc_cur_id,rc_user," .
 439                           "rc_user_text,rc_comment,rc_this_oldid,rc_last_oldid) VALUES (" .
 440                           "'{$now}','{$now}'," . $this->mTitle->getNamespace() . ",'" .
 441                           wfStrencode( $this->mTitle->getDBkey() ) . "',0,{$me2}," .
 442                           ( $wgUser->isBot() ? 1 : 0 ) . "," .
 443                           $this->getID() . "," . $wgUser->getID() . ",'" .
 444                           wfStrencode( $wgUser->getName() ) . "','" .
 445                           wfStrencode( $summary ) . "',0,{$oldid})";
 446                         wfQuery( $sql, DB_WRITE, $fname );
 447
 448                         $sql = "UPDATE recentchanges SET rc_this_oldid={$oldid} " .
 449                           "WHERE rc_namespace=" . $this->mTitle->getNamespace() . " AND " .
 450                           "rc_title='" . wfStrencode( $this->mTitle->getDBkey() ) . "' AND " .
 451                           "rc_timestamp='" . $this->getTimestamp() . "'";
 452                         wfQuery( $sql, DB_WRITE, $fname );
 453
 454                         $sql = "UPDATE recentchanges SET rc_cur_time='{$now}' " .
 455                           "WHERE rc_cur_id=" . $this->getID();
 456                         wfQuery( $sql, DB_WRITE, $fname );
 457                 }
 458                 if( $wgDBtransactions ) {
 459                         $sql = "COMMIT";
 460                         wfQuery( $sql, DB_WRITE );
 461                 }
 462
 463                 if ($watchthis) {
 464                         if (!$this->mTitle->userIsWatching()) $this->watch();
 465                 } else {
 466                         if ( $this->mTitle->userIsWatching() ) {
 467                                 $this->unwatch();
 468                         }
 469                 }
 470
 471                 $this->showArticle( $text, wfMsg( "updated" ) );
 472                 return true;
 473         }
 474
 475         # After we've either updated or inserted the article, update
 476         # the link tables and redirect to the new page.
 477
 478         function showArticle( $text, $subtitle )
 479         {
 480                 global $wgOut, $wgUser, $wgLinkCache, $wgUseBetterLinksUpdate;
 481                 global $wgMwRedir;
 482
 483                 $wgLinkCache = new LinkCache();
 484
 485                 # Get old version of link table to allow incremental link updates
 486                 if ( $wgUseBetterLinksUpdate ) {
 487                         $wgLinkCache->preFill( $this->mTitle );
 488                         $wgLinkCache->clear();
 489                 }
 490
 491                 # Now update the link cache by parsing the text
 492                 $wgOut = new OutputPage();
 493                 $wgOut->addWikiText( $text );
 494
 495                 $this->editUpdates( $text );
 496                 if( $wgMwRedir->matchStart( $text ) )
 497                         $r = "redirect=no";
 498                 else
 499                         $r = "";
 500                 $wgOut->redirect( wfLocalUrl( $this->mTitle->getPrefixedURL(), $r ) );
 501         }
 502
 503         # Add this page to my watchlist
 504
 505         function watch( $add = true )
 506         {
 507                 global $wgUser, $wgOut, $wgLang;
 508                 global $wgDeferredUpdateList;
 509
 510                 if ( 0 == $wgUser->getID() ) {
 511                         $wgOut->errorpage( "watchnologin", "watchnologintext" );
 512                         return;
 513                 }
 514                 if ( wfReadOnly() ) {
 515                         $wgOut->readOnlyPage();
 516                         return;
 517                 }
 518                 if( $add )
 519                         $wgUser->addWatch( $this->mTitle );
 520                 else
 521                         $wgUser->removeWatch( $this->mTitle );
 522
 523                 $wgOut->setPagetitle( wfMsg( $add ? "addedwatch" : "removedwatch" ) );
 524                 $wgOut->setRobotpolicy( "noindex,follow" );
 525
 526                 $sk = $wgUser->getSkin() ;
 527                 $link = $sk->makeKnownLink ( $this->mTitle->getPrefixedText() ) ;
 528
 529                 if($add)
 530                         $text = wfMsg( "addedwatchtext", $link );
 531                 else
 532                         $text = wfMsg( "removedwatchtext", $link );
 533                 $wgOut->addHTML( $text );
 534
 535                 $up = new UserUpdate();
 536                 array_push( $wgDeferredUpdateList, $up );
 537
 538                 $wgOut->returnToMain( false );
 539         }
 540
 541         function unwatch()
 542         {
 543                 $this->watch( false );
 544         }
 545
 546         # This shares a lot of issues (and code) with Recent Changes
 547
 548         function history()
 549         {
 550                 global $wgUser, $wgOut, $wgLang, $offset, $limit;
 551
 552                 # If page hasn't changed, client can cache this
 553
 554                 $wgOut->checkLastModified( $this->getTimestamp() );
 555                 $fname = "Article::history";
 556                 wfProfileIn( $fname );
 557
 558                 $wgOut->setPageTitle( $this->mTitle->getPRefixedText() );
 559                 $wgOut->setSubtitle( wfMsg( "revhistory" ) );
 560                 $wgOut->setArticleFlag( false );
 561                 $wgOut->setRobotpolicy( "noindex,nofollow" );
 562
 563                 if( $this->mTitle->getArticleID() == 0 ) {
 564                         $wgOut->addHTML( wfMsg( "nohistory" ) );
 565                         wfProfileOut( $fname );
 566                         return;
 567                 }
 568
 569                 $offset = (int)$offset;
 570                 $limit = (int)$limit;
 571                 if( $limit == 0 ) $limit = 50;
 572                 $namespace = $this->mTitle->getNamespace();
 573                 $title = $this->mTitle->getText();
 574                 $sql = "SELECT old_id,old_user," .
 575                   "old_comment,old_user_text,old_timestamp,old_minor_edit ".
 576                   "FROM old USE INDEX (name_title_timestamp) " .
 577                   "WHERE old_namespace={$namespace} AND " .
 578                   "old_title='" . wfStrencode( $this->mTitle->getDBkey() ) . "' " .
 579                   "ORDER BY inverse_timestamp LIMIT $offset, $limit";
 580                 $res = wfQuery( $sql, DB_READ, "Article::history" );
 581
 582                 $revs = wfNumRows( $res );
 583                 if( $this->mTitle->getArticleID() == 0 ) {
 584                         $wgOut->addHTML( wfMsg( "nohistory" ) );
 585                         wfProfileOut( $fname );
 586                         return;
 587                 }
 588
 589                 $sk = $wgUser->getSkin();
 590                 $numbar = wfViewPrevNext(
 591                         $offset, $limit,
 592                         $this->mTitle->getPrefixedText(),
 593                         "action=history" );
 594                 $s = $numbar;
 595                 $s .= $sk->beginHistoryList();
 596
 597                 if($offset == 0 )
 598                 $s .= $sk->historyLine( $this->getTimestamp(), $this->getUser(),
 599                   $this->getUserText(), $namespace,
 600                   $title, 0, $this->getComment(),
 601                   ( $this->getMinorEdit() > 0 ) );
 602
 603                 $revs = wfNumRows( $res );
 604                 while ( $line = wfFetchObject( $res ) ) {
 605                         $s .= $sk->historyLine( $line->old_timestamp, $line->old_user,
 606                           $line->old_user_text, $namespace,
 607                           $title, $line->old_id,
 608                           $line->old_comment, ( $line->old_minor_edit > 0 ) );
 609                 }
 610                 $s .= $sk->endHistoryList();
 611                 $s .= $numbar;
 612                 $wgOut->addHTML( $s );
 613                 wfProfileOut( $fname );
 614         }
 615
 616         function protect( $limit = "sysop" )
 617         {
 618                 global $wgUser, $wgOut;
 619
 620                 if ( ! $wgUser->isSysop() ) {
 621                         $wgOut->sysopRequired();
 622                         return;
 623                 }
 624                 if ( wfReadOnly() ) {
 625                         $wgOut->readOnlyPage();
 626                         return;
 627                 }
 628                 $id = $this->mTitle->getArticleID();
 629                 if ( 0 == $id ) {
 630                         $wgOut->fatalEror( wfMsg( "badarticleerror" ) );
 631                         return;
 632                 }
 633         $sql = "UPDATE cur SET cur_touched='" . wfTimestampNow() . "'," .
 634                         "cur_restrictions='{$limit}' WHERE cur_id={$id}";
 635                 wfQuery( $sql, DB_WRITE, "Article::protect" );
 636
 637                 $wgOut->redirect( wfLocalUrl( $this->mTitle->getPrefixedURL() ) );
 638         }
 639
 640         function unprotect()
 641         {
 642                 return $this->protect( "" );
 643         }
 644
 645         function delete()
 646         {
 647                 global $wgUser, $wgOut;
 648                 global $wpConfirm, $wpReason, $image, $oldimage;
 649
 650                 # Anybody can delete old revisions of images; only sysops
 651                 # can delete articles and current images
 652
 653                 if ( ( ! $oldimage ) && ( ! $wgUser->isSysop() ) ) {
 654                         $wgOut->sysopRequired();
 655                         return;
 656                 }
 657                 if ( wfReadOnly() ) {
 658                         $wgOut->readOnlyPage();
 659                         return;
 660                 }
 661
 662                 # Better double-check that it hasn't been deleted yet!
 663                 $wgOut->setPagetitle( wfMsg( "confirmdelete" ) );
 664                 if ( ( "" == trim( $this->mTitle->getText() ) )
 665                   or ( $this->mTitle->getArticleId() == 0 ) ) {
 666                         $wgOut->fatalError( wfMsg( "cannotdelete" ) );
 667                         return;
 668                 }
 669
 670                 # determine whether this page has earlier revisions
 671                 # and insert a warning if it does
 672                 # we select the text because it might be useful below
 673                 $sql="SELECT old_text FROM old WHERE old_namespace=0 and old_title='" . wfStrencode($this->mTitle->getPrefixedDBkey())."' ORDER BY inverse_timestamp LIMIT 1";
 674                 $res=wfQuery($sql, DB_READ, $fname);
 675                 if( ($old=wfFetchObject($res)) && !$wpConfirm ) {
 676                         $skin=$wgUser->getSkin();
 677                         $wgOut->addHTML("<B>".wfMsg("historywarning"));
 678                         $wgOut->addHTML( $skin->historyLink() ."</B><P>");
 679                 }
 680
 681                 $sql="SELECT cur_text FROM cur WHERE cur_namespace=0 and cur_title='" . wfStrencode($this->mTitle->getPrefixedDBkey())."'";
 682                 $res=wfQuery($sql, DB_READ, $fname);
 683                 if( ($s=wfFetchObject($res))) {
 684
 685                         # if this is a mini-text, we can paste part of it into the deletion reason
 686
 687                         #if this is empty, an earlier revision may contain "useful" text
 688                         if($s->cur_text!="") {
 689                                 $text=$s->cur_text;
 690                         } else {
 691                                 if($old) {
 692                                         $text=$old->old_text;
 693                                         $blanked=1;
 694                                 }
 695
 696                         }
 697
 698                         $length=strlen($text);
 699
 700                         # this should not happen, since it is not possible to store an empty, new
 701                         # page. Let's insert a standard text in case it does, though
 702                         if($length==0 && !$wpReason) { $wpReason=wfmsg("exblank");}
 703
 704
 705                         if($length < 500 && !$wpReason) {
 706
 707                                 # comment field=255, let's grep the first 150 to have some user
 708                                 # space left
 709                                 $text=substr($text,0,150);
 710                                 # let's strip out newlines and HTML tags
 711                                 $text=preg_replace("/\"/","'",$text);
 712                                 $text=preg_replace("/\</","&lt;",$text);
 713                                 $text=preg_replace("/\>/","&gt;",$text);
 714                                 $text=preg_replace("/[\n\r]/","",$text);
 715                                 if(!$blanked) {
 716                                         $wpReason=wfMsg("excontent"). " '".$text;
 717                                 } else {
 718                                         $wpReason=wfMsg("exbeforeblank") . " '".$text;
 719                                 }
 720                                 if($length>150) { $wpReason .= "..."; } # we've only pasted part of the text
 721                                 $wpReason.="'";
 722                         }
 723                 }
 724
 725                 return $this->confirmDelete();
 726         }
 727
 728         function confirmDelete( $par = "" )
 729         {
 730                 global $wgOut;
 731
 732                 $sub = htmlspecialchars( $this->mTitle->getPrefixedText() );
 733                 $wgOut->setSubtitle( wfMsg( "deletesub", $sub ) );
 734                 $wgOut->setRobotpolicy( "noindex,nofollow" );
 735                 $wgOut->addWikiText( wfMsg( "confirmdeletetext" ) );
 736
 737                 $t = $this->mTitle->getPrefixedURL();
 738
 739                 $formaction = wfEscapeHTML( wfLocalUrl( $t, "action=delete" . $par ) );
 740                 $confirm = wfMsg( "confirm" );
 741                 $check = wfMsg( "confirmcheck" );
 742                 $delcom = wfMsg( "deletecomment" );
 743
 744                 $wgOut->addHTML( "
 745 <form id=\"deleteconfirm\" method=\"post\" action=\"{$formaction}\">
 746 <table border=0><tr><td align=right>
 747 {$delcom}:</td><td align=left>
 748 <input type=text size=60 name=\"wpReason\" value=\"{$wpReason}\">
 749 </td></tr><tr><td>&nbsp;</td></tr>
 750 <tr><td align=right>
 751 <input type=checkbox name=\"wpConfirm\" value='1' id=\"wpConfirm\">
 752 </td><td><label for=\"wpConfirm\">{$check}</label></td>
 753 </tr><tr><td>&nbsp;</td><td>
 754 <input type=submit name=\"wpConfirmB\" value=\"{$confirm}\">
 755 </td></tr></table></form>\n" );
 756
 757                 $wgOut->returnToMain( false );
 758         }
 759
 760         function doDelete()
 761         {
 762                 global $wgOut, $wgUser, $wgLang;
 763                 global $wpReason;
 764                 $fname = "Article::doDelete";
 765
 766                 $this->doDeleteArticle( $this->mTitle );
 767                 $deleted = $this->mTitle->getPrefixedText();
 768
 769                 $wgOut->setPagetitle( wfMsg( "actioncomplete" ) );
 770                 $wgOut->setRobotpolicy( "noindex,nofollow" );
 771
 772                 $sk = $wgUser->getSkin();
 773                 $loglink = $sk->makeKnownLink( $wgLang->getNsText(
 774                   Namespace::getWikipedia() ) .
 775                   ":" . wfMsg( "dellogpage" ), wfMsg( "deletionlog" ) );
 776
 777                 $text = str_replace( "$1" , $deleted, wfMsg( "deletedtext" ) );
 778                 $text = str_replace( "$2", $loglink, $text );
 779
 780                 $wgOut->addHTML( "<p>" . $text );
 781                 $wgOut->returnToMain( false );
 782         }
 783
 784         function doDeleteArticle( $title )
 785         {
 786                 global $wgUser, $wgOut, $wgLang, $wpReason, $wgDeferredUpdateList;
 787
 788                 $fname = "Article::doDeleteArticle";
 789                 $ns = $title->getNamespace();
 790                 $t = wfStrencode( $title->getDBkey() );
 791                 $id = $title->getArticleID();
 792
 793                 if ( "" == $t ) {
 794                         $wgOut->fatalError( wfMsg( "cannotdelete" ) );
 795                         return;
 796                 }
 797
 798                 $u = new SiteStatsUpdate( 0, 1, -$this->isCountable( $this->getContent( true ) ) );
 799                 array_push( $wgDeferredUpdateList, $u );
 800
 801                 # Move article and history to the "archive" table
 802                 $sql = "INSERT INTO archive (ar_namespace,ar_title,ar_text," .
 803                   "ar_comment,ar_user,ar_user_text,ar_timestamp,ar_minor_edit," .
 804                   "ar_flags) SELECT cur_namespace,cur_title,cur_text,cur_comment," .
 805                   "cur_user,cur_user_text,cur_timestamp,cur_minor_edit,0 FROM cur " .
 806                   "WHERE cur_namespace={$ns} AND cur_title='{$t}'";
 807                 wfQuery( $sql, DB_WRITE, $fname );
 808
 809                 $sql = "INSERT INTO archive (ar_namespace,ar_title,ar_text," .
 810                   "ar_comment,ar_user,ar_user_text,ar_timestamp,ar_minor_edit," .
 811                   "ar_flags) SELECT old_namespace,old_title,old_text,old_comment," .
 812                   "old_user,old_user_text,old_timestamp,old_minor_edit,old_flags " .
 813                   "FROM old WHERE old_namespace={$ns} AND old_title='{$t}'";
 814                 wfQuery( $sql, DB_WRITE, $fname );
 815
 816                 # Now that it's safely backed up, delete it
 817
 818                 $sql = "DELETE FROM cur WHERE cur_namespace={$ns} AND " .
 819                   "cur_title='{$t}'";
 820                 wfQuery( $sql, DB_WRITE, $fname );
 821
 822                 $sql = "DELETE FROM old WHERE old_namespace={$ns} AND " .
 823                   "old_title='{$t}'";
 824                 wfQuery( $sql, DB_WRITE, $fname );
 825
 826                 $sql = "DELETE FROM recentchanges WHERE rc_namespace={$ns} AND " .
 827                   "rc_title='{$t}'";
 828         wfQuery( $sql, DB_WRITE, $fname );
 829
 830                 # Finally, clean up the link tables
 831
 832                 if ( 0 != $id ) {
 833                         $t = wfStrencode( $title->getPrefixedDBkey() );
 834                         $sql = "SELECT l_from FROM links WHERE l_to={$id}";
 835                         $res = wfQuery( $sql, DB_READ, $fname );
 836
 837                         $sql = "INSERT INTO brokenlinks (bl_from,bl_to) VALUES ";
 838             $now = wfTimestampNow();
 839                         $sql2 = "UPDATE cur SET cur_touched='{$now}' WHERE cur_id IN (";
 840                         $first = true;
 841
 842                         while ( $s = wfFetchObject( $res ) ) {
 843                                 $nt = Title::newFromDBkey( $s->l_from );
 844                                 $lid = $nt->getArticleID();
 845
 846                                 if ( ! $first ) { $sql .= ","; $sql2 .= ","; }
 847                                 $first = false;
 848                                 $sql .= "({$lid},'{$t}')";
 849                                 $sql2 .= "{$lid}";
 850                         }
 851                         $sql2 .= ")";
 852                         if ( ! $first ) {
 853                                 wfQuery( $sql, DB_WRITE, $fname );
 854                                 wfQuery( $sql2, DB_WRITE, $fname );
 855                         }
 856                         wfFreeResult( $res );
 857
 858                         $sql = "DELETE FROM links WHERE l_to={$id}";
 859                         wfQuery( $sql, DB_WRITE, $fname );
 860
 861                         $sql = "DELETE FROM links WHERE l_from='{$t}'";
 862                         wfQuery( $sql, DB_WRITE, $fname );
 863
 864                         $sql = "DELETE FROM imagelinks WHERE il_from='{$t}'";
 865                         wfQuery( $sql, DB_WRITE, $fname );
 866
 867                         $sql = "DELETE FROM brokenlinks WHERE bl_from={$id}";
 868                         wfQuery( $sql, DB_WRITE, $fname );
 869                 }
 870
 871                 $log = new LogPage( wfMsg( "dellogpage" ), wfMsg( "dellogpagetext" ) );
 872                 $art = $title->getPrefixedText();
 873                 $wpReason = wfCleanQueryVar( $wpReason );
 874                 $log->addEntry( str_replace( "$1", $art, wfMsg( "deletedarticle" ) ), $wpReason );
 875
 876                 # Clear the cached article id so the interface doesn't act like we exist
 877                 $this->mTitle->resetArticleID( 0 );
 878                 $this->mTitle->mArticleID = 0;
 879         }
 880
 881         function rollback()
 882         {
 883                 global $wgUser, $wgLang, $wgOut, $from;
 884
 885                 if ( ! $wgUser->isSysop() ) {
 886                         $wgOut->sysopRequired();
 887                         return;
 888                 }
 889
 890                 # Replace all this user's current edits with the next one down
 891                 $tt = wfStrencode( $this->mTitle->getDBKey() );
 892                 $n = $this->mTitle->getNamespace();
 893
 894                 # Get the last editor
 895                 $sql = "SELECT cur_id,cur_user,cur_user_text,cur_comment FROM cur WHERE cur_title='{$tt}' AND cur_namespace={$n}";
 896                 $res = wfQuery( $sql, DB_READ );
 897                 if( ($x = wfNumRows( $res )) != 1 ) {
 898                         # Something wrong
 899                         $wgOut->addHTML( wfMsg( "notanarticle" ) );
 900                         return;
 901                 }
 902                 $s = wfFetchObject( $res );
 903                 $ut = wfStrencode( $s->cur_user_text );
 904                 $uid = $s->cur_user;
 905                 $pid = $s->cur_id;
 906
 907                 $from = str_replace( '_', ' ', wfCleanQueryVar( $from ) );
 908                 if( $from != $s->cur_user_text ) {
 909                         $wgOut->setPageTitle(wfmsg("rollbackfailed"));
 910                         $wgOut->addWikiText( wfMsg( "alreadyrolled",
 911                                 htmlspecialchars( $this->mTitle->getPrefixedText()),
 912                                 htmlspecialchars( $from ),
 913                                 htmlspecialchars( $s->cur_user_text ) ) );
 914                         if($s->cur_comment != "") {
 915                                 $wgOut->addHTML(
 916                                         wfMsg("editcomment",
 917                                         htmlspecialchars( $s->cur_comment ) ) );
 918                                 }
 919                         return;
 920                 }
 921
 922                 # Get the last edit not by this guy
 923                 $sql = "SELECT old_text,old_user,old_user_text
 924                 FROM old USE INDEX (name_title_timestamp)
 925                 WHERE old_namespace={$n} AND old_title='{$tt}'
 926                 AND (old_user <> {$uid} OR old_user_text <> '{$ut}')
 927                 ORDER BY inverse_timestamp LIMIT 1";
 928                 $res = wfQuery( $sql, DB_READ );
 929                 if( wfNumRows( $res ) != 1 ) {
 930                         # Something wrong
 931                         $wgOut->setPageTitle(wfMsg("rollbackfailed"));
 932                         $wgOut->addHTML( wfMsg( "cantrollback" ) );
 933                         return;
 934                 }
 935                 $s = wfFetchObject( $res );
 936
 937                 # Save it!
 938                 $newcomment = str_replace( "$1", $s->old_user_text, wfMsg( "revertpage" ) );
 939                 $wgOut->setPagetitle( wfMsg( "actioncomplete" ) );
 940                 $wgOut->setRobotpolicy( "noindex,nofollow" );
 941                 $wgOut->addHTML( "<h2>" . $newcomment . "</h2>\n<hr>\n" );
 942                 $this->updateArticle( $s->old_text, $newcomment, 1, $this->mTitle->userIsWatching() );
 943
 944                 $wgOut->returnToMain( false );
 945         }
 946
 947
 948         # Do standard deferred updates after page view
 949
 950         /* private */ function viewUpdates()
 951         {
 952                 global $wgDeferredUpdateList;
 953
 954                 if ( 0 != $this->getID() ) {
 955                         $u = new ViewCountUpdate( $this->getID() );
 956                         array_push( $wgDeferredUpdateList, $u );
 957                         $u = new SiteStatsUpdate( 1, 0, 0 );
 958                         array_push( $wgDeferredUpdateList, $u );
 959
 960                         $u = new UserTalkUpdate( 0, $this->mTitle->getNamespace(),
 961                           $this->mTitle->getDBkey() );
 962                         array_push( $wgDeferredUpdateList, $u );
 963                 }
 964         }
 965
 966         # Do standard deferred updates after page edit.
 967         # Every 1000th edit, prune the recent changes table.
 968
 969         /* private */ function editUpdates( $text )
 970         {
 971                 global $wgDeferredUpdateList, $wgDBname, $wgMemc;
 972
 973                 wfSeedRandom();
 974                 if ( 0 == mt_rand( 0, 999 ) ) {
 975                         $cutoff = wfUnix2Timestamp( time() - ( 7 * 86400 ) );
 976                         $sql = "DELETE FROM recentchanges WHERE rc_timestamp < '{$cutoff}'";
 977                         wfQuery( $sql, DB_WRITE );
 978                 }
 979                 $id = $this->getID();
 980                 $title = $this->mTitle->getPrefixedDBkey();
 981                 $adj = $this->mCountAdjustment;
 982
 983                 if ( 0 != $id ) {
 984                         $u = new LinksUpdate( $id, $title );
 985                         array_push( $wgDeferredUpdateList, $u );
 986                         $u = new SiteStatsUpdate( 0, 1, $adj );
 987                         array_push( $wgDeferredUpdateList, $u );
 988                         $u = new SearchUpdate( $id, $title, $text );
 989                         array_push( $wgDeferredUpdateList, $u );
 990
 991                         $u = new UserTalkUpdate( 1, $this->mTitle->getNamespace(),
 992                           $this->mTitle->getDBkey() );
 993                         array_push( $wgDeferredUpdateList, $u );
 994
 995                         if ( $this->getNamespace == NS_MEDIAWIKI ) {
 996                                 $messageCache = $wgMemc->get( "$wgDBname:messages" );
 997                                 if (!$messageCache) {
 998                                         $messageCache = wfLoadAllMessages();
 999                                 }
1000                                 $messageCache[$title] = $text;
1001                                 $wgMemc->set( "$wgDBname:messages" );
1002                         }
1003                 }
1004         }
1005
1006         /* private */ function setOldSubtitle()
1007         {
1008                 global $wgLang, $wgOut;
1009
1010                 $td = $wgLang->timeanddate( $this->mTimestamp, true );
1011                 $r = str_replace( "$1", "{$td}", wfMsg( "revisionasof" ) );
1012                 $wgOut->setSubtitle( "({$r})" );
1013         }
1014
1015         # This function is called right before saving the wikitext,
1016         # so we can do things like signatures and links-in-context.
1017
1018         function preSaveTransform( $text )
1019         {
1020                 $s = "";
1021                 while ( "" != $text ) {
1022                         $p = preg_split( "/<\\s*nowiki\\s*>/i", $text, 2 );
1023                         $s .= $this->pstPass2( $p[0] );
1024
1025                         if ( ( count( $p ) < 2 ) || ( "" == $p[1] ) ) { $text = ""; }
1026                         else {
1027                                 $q = preg_split( "/<\\/\\s*nowiki\\s*>/i", $p[1], 2 );
1028                                 $s .= "<nowiki>{$q[0]}</nowiki>";
1029                                 $text = $q[1];
1030                         }
1031                 }
1032                 return rtrim( $s );
1033         }
1034
1035         /* private */ function pstPass2( $text )
1036         {
1037                 global $wgUser, $wgLang, $wgLocaltimezone;
1038
1039                 # Signatures
1040                 #
1041                 $n = $wgUser->getName();
1042                 $k = $wgUser->getOption( "nickname" );
1043                 if ( "" == $k ) { $k = $n; }
1044                 if(isset($wgLocaltimezone)) {
1045                         $oldtz = getenv("TZ"); putenv("TZ=$wgLocaltimezone");
1046                 }
1047                 /* Note: this is an ugly timezone hack for the European wikis */
1048                 $d = $wgLang->timeanddate( date( "YmdHis" ), false ) .
1049                   " (" . date( "T" ) . ")";
1050                 if(isset($wgLocaltimezone)) putenv("TZ=$oldtz");
1051
1052                 $text = preg_replace( "/~~~~/", "[[" . $wgLang->getNsText(
1053                   Namespace::getUser() ) . ":$n|$k]] $d", $text );
1054                 $text = preg_replace( "/~~~/", "[[" . $wgLang->getNsText(
1055                   Namespace::getUser() ) . ":$n|$k]]", $text );
1056
1057                 # Context links: [[|name]] and [[name (context)|]]
1058                 #
1059                 $tc = "[&;%\\-,.\\(\\)' _0-9A-Za-z\\/:\\x80-\\xff]";
1060                 $np = "[&;%\\-,.' _0-9A-Za-z\\/:\\x80-\\xff]"; # No parens
1061                 $conpat = "/^({$np}+) \\(({$tc}+)\\)$/";
1062
1063                 $p1 = "/\[\[({$np}+) \\(({$np}+)\\)\\|]]/";             # [[page (context)|]]
1064                 $p2 = "/\[\[\\|({$tc}+)]]/";                                    # [[|page]]
1065                 $p3 = "/\[\[([A-Za-z _]+):({$np}+)\\|]]/";              # [[namespace:page|]]
1066                 $p4 = "/\[\[([A-Aa-z _]+):({$np}+) \\(({$np}+)\\)\\|]]/";
1067                                                                                                                 # [[ns:page (cont)|]]
1068                 $context = "";
1069                 $t = $this->mTitle->getText();
1070                 if ( preg_match( $conpat, $t, $m ) ) {
1071                         $context = $m[2];
1072                 }
1073                 $text = preg_replace( $p4, "[[\\1:\\2 (\\3)|\\2]]", $text );
1074                 $text = preg_replace( $p1, "[[\\1 (\\2)|\\1]]", $text );
1075                 $text = preg_replace( $p3, "[[\\1:\\2|\\2]]", $text );
1076
1077                 if ( "" == $context ) {
1078                         $text = preg_replace( $p2, "[[\\1]]", $text );
1079                 } else {
1080                         $text = preg_replace( $p2, "[[\\1 ({$context})|\\1]]", $text );
1081                 }
1082
1083                 # {{SUBST:xxx}} variables
1084                 #
1085                 $mw =& MagicWord::get( MAG_SUBST );
1086                 $text = $mw->substituteCallback( $text, "wfReplaceSubstVar" );
1087
1088                 return $text;
1089         }
1090
1091         /* Caching functions */
1092
1093         function tryFileCache() {
1094                 if($this->isFileCacheable()) {
1095                         $touched = $this->mTouched;
1096                         if( strpos( $this->mContent, "{{" ) !== false ) {
1097                                 # Expire pages with variable replacements in an hour
1098                                 $expire = wfUnix2Timestamp( time() - 3600 );
1099                                 $touched = max( $expire, $touched );
1100                         }
1101                         $cache = new CacheManager( $this->mTitle );
1102                         if($cache->isFileCacheGood( $touched )) {
1103                                 wfDebug( " tryFileCache() - about to load\n" );
1104                                 $cache->loadFromFileCache();
1105                                 exit;
1106                         } else {
1107                                 wfDebug( " tryFileCache() - starting buffer\n" );
1108                                 if($cache->useGzip() && wfClientAcceptsGzip()) {
1109                                         /* For some reason, adding this header line over in
1110                                            CacheManager::saveToFileCache() fails on my test
1111                                            setup at home, though it works on the live install.
1112                                            Make double-sure...  --brion */
1113                                         header( "Content-Encoding: gzip" );
1114                                 }
1115                                 ob_start( array(&$cache, 'saveToFileCache' ) );
1116                         }
1117                 } else {
1118                         wfDebug( " tryFileCache() - not cacheable\n" );
1119                 }
1120         }
1121
1122         function isFileCacheable() {
1123                 global $wgUser, $wgUseFileCache, $wgShowIPinHeader;
1124                 global $action, $oldid, $diff, $redirect, $printable;
1125                 return $wgUseFileCache
1126                         and (!$wgShowIPinHeader)
1127                         and ($this->getID() != 0)
1128                         and ($wgUser->getId() == 0)
1129                         and (!$wgUser->getNewtalk())
1130                         and ($this->mTitle->getNamespace != Namespace::getSpecial())
1131                         and ($action == "view")
1132                         and (!isset($oldid))
1133                         and (!isset($diff))
1134                         and (!isset($redirect))
1135                         and (!isset($printable))
1136                         and (!$this->mRedirectedFrom);
1137
1138         }
1139
1140
1141 }
1142
1143 function wfReplaceSubstVar( $matches ) {
1144         return wfMsg( $matches[1] );
1145 }
1146
1147 ?>