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