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, $IP;
 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( $diff ) ) {
 269                         include_once( "$IP/DifferenceEngine.php" );
 270                         $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
 271                         $de = new DifferenceEngine( $oldid, $diff );
 272                         $de->showDiffPage();
 273                         wfProfileOut( $fname );
 274                         return;
 275                 }
 276                 $text = $this->getContent(); # May change wgTitle!
 277                 $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
 278                 $wgOut->setHTMLTitle( $this->mTitle->getPrefixedText() .
 279                   " - " . wfMsg( "wikititlesuffix" ) );
 280
 281                 # We're looking at an old revision
 282
 283                 if ( $oldid ) {
 284                         $this->setOldSubtitle();
 285                         $wgOut->setRobotpolicy( "noindex,follow" );
 286                 }
 287                 if ( "" != $this->mRedirectedFrom ) {
 288                         $sk = $wgUser->getSkin();
 289                         $redir = $sk->makeKnownLink( $this->mRedirectedFrom, "",
 290                           "redirect=no" );
 291                         $s = str_replace( "$1", $redir, wfMsg( "redirectedfrom" ) );
 292                         $wgOut->setSubtitle( $s );
 293                 }
 294                 $wgOut->checkLastModified( $this->mTouched );
 295                 $this->tryFileCache();
 296                 $wgLinkCache->preFill( $this->mTitle );
 297                 $wgOut->addWikiText( $text );
 298
 299                 $this->viewUpdates();
 300                 wfProfileOut( $fname );
 301         }
 302
 303         # Theoretically we could defer these whole insert and update
 304         # functions for after display, but that's taking a big leap
 305         # of faith, and we want to be able to report database
 306         # errors at some point.
 307
 308         /* private */ function insertNewArticle( $text, $summary, $isminor, $watchthis )
 309         {
 310                 global $wgOut, $wgUser, $wgLinkCache, $wgMwRedir;
 311                 $fname = "Article::insertNewArticle";
 312
 313                 $ns = $this->mTitle->getNamespace();
 314                 $ttl = $this->mTitle->getDBkey();
 315                 $text = $this->preSaveTransform( $text );
 316                 if ( $wgMwRedir->matchStart( $text ) ) { $redir = 1; }
 317                 else { $redir = 0; }
 318
 319                 $now = wfTimestampNow();
 320                 $won = wfInvertTimestamp( $now );
 321                 wfSeedRandom();
 322                 $rand = number_format( mt_rand() / mt_getrandmax(), 12, ".", "" );
 323                 $sql = "INSERT INTO cur (cur_namespace,cur_title,cur_text," .
 324                   "cur_comment,cur_user,cur_timestamp,cur_minor_edit,cur_counter," .
 325                   "cur_restrictions,cur_user_text,cur_is_redirect," .
 326                   "cur_is_new,cur_random,cur_touched,inverse_timestamp) VALUES ({$ns},'" . wfStrencode( $ttl ) . "', '" .
 327                   wfStrencode( $text ) . "', '" .
 328                   wfStrencode( $summary ) . "', '" .
 329                   $wgUser->getID() . "', '{$now}', " .
 330                   ( $isminor ? 1 : 0 ) . ", 0, '', '" .
 331                   wfStrencode( $wgUser->getName() ) . "', $redir, 1, $rand, '{$now}', '{$won}')";
 332                 $res = wfQuery( $sql, DB_WRITE, $fname );
 333
 334                 $newid = wfInsertId();
 335                 $this->mTitle->resetArticleID( $newid );
 336
 337                 $sql = "INSERT INTO recentchanges (rc_timestamp,rc_cur_time," .
 338                   "rc_namespace,rc_title,rc_new,rc_minor,rc_cur_id,rc_user," .
 339                   "rc_user_text,rc_comment,rc_this_oldid,rc_last_oldid,rc_bot) VALUES (" .
 340                   "'{$now}','{$now}',{$ns},'" . wfStrencode( $ttl ) . "',1," .
 341                   ( $isminor ? 1 : 0 ) . ",{$newid}," . $wgUser->getID() . ",'" .
 342                   wfStrencode( $wgUser->getName() ) . "','" .
 343                   wfStrencode( $summary ) . "',0,0," .
 344                   ( $wgUser->isBot() ? 1 : 0 ) . ")";
 345                 wfQuery( $sql, DB_WRITE, $fname );
 346                 if ($watchthis) {
 347                         if(!$this->mTitle->userIsWatching()) $this->watch();
 348                 } else {
 349                         if ( $this->mTitle->userIsWatching() ) {
 350                                 $this->unwatch();
 351                         }
 352                 }
 353
 354                 $this->showArticle( $text, wfMsg( "newarticle" ) );
 355         }
 356
 357         function updateArticle( $text, $summary, $minor, $watchthis, $section="" )
 358         {
 359                 global $wgOut, $wgUser, $wgLinkCache;
 360                 global $wgDBtransactions, $wgMwRedir;
 361                 $fname = "Article::updateArticle";
 362
 363                 $this->loadLastEdit();
 364
 365                 // insert updated section into old text if we have only edited part
 366                 // of the article
 367                 if ($section != "") {
 368                         $oldtext=$this->getContent();
 369                         if($section=="new") {
 370                                 if($summary) $subject="== {$summary} ==\n\n";
 371                                 $text=$oldtext."\n\n".$subject.$text;
 372                         } else {
 373                                 $secs=preg_split("/(^=+.*?=+|^<h[1-6].*?>.*?<\/h[1-6].*?>)/mi",
 374                                   $oldtext,-1,PREG_SPLIT_DELIM_CAPTURE);
 375                                 $secs[$section*2]=$text."\n\n"; // replace with edited
 376                                 if($section) { $secs[$section*2-1]=""; } // erase old headline
 377                                 $text=join("",$secs);
 378                         }
 379                 }
 380                 if ( $this->mMinorEdit ) { $me1 = 1; } else { $me1 = 0; }
 381                 if ( $minor ) { $me2 = 1; } else { $me2 = 0; }
 382                 if ( preg_match( "/^((" . $wgMwRedir->getBaseRegex() . ")[^\\n]+)/i", $text, $m ) ) {
 383                         $redir = 1;
 384                         $text = $m[1] . "\n"; # Remove all content but redirect
 385                 }
 386                 else { $redir = 0; }
 387
 388                 $text = $this->preSaveTransform( $text );
 389
 390                 # Update article, but only if changed.
 391
 392                 if( $wgDBtransactions ) {
 393                         $sql = "BEGIN";
 394                         wfQuery( $sql, DB_WRITE );
 395                 }
 396                 $oldtext = $this->getContent( true );
 397
 398                 if ( 0 != strcmp( $text, $oldtext ) ) {
 399                         $this->mCountAdjustment = $this->isCountable( $text )
 400                           - $this->isCountable( $oldtext );
 401
 402                         $now = wfTimestampNow();
 403                         $won = wfInvertTimestamp( $now );
 404                         $sql = "UPDATE cur SET cur_text='" . wfStrencode( $text ) .
 405                           "',cur_comment='" .  wfStrencode( $summary ) .
 406                           "',cur_minor_edit={$me2}, cur_user=" . $wgUser->getID() .
 407                           ",cur_timestamp='{$now}',cur_user_text='" .
 408                           wfStrencode( $wgUser->getName() ) .
 409                           "',cur_is_redirect={$redir}, cur_is_new=0, cur_touched='{$now}', inverse_timestamp='{$won}' " .
 410                           "WHERE cur_id=" . $this->getID() .
 411                           " AND cur_timestamp='" . $this->getTimestamp() . "'";
 412                         $res = wfQuery( $sql, DB_WRITE, $fname );
 413
 414                         if( wfAffectedRows() == 0 ) {
 415                                 /* Belated edit conflict! Run away!! */
 416                                 return false;
 417                         }
 418
 419                         $sql = "INSERT INTO old (old_namespace,old_title,old_text," .
 420                           "old_comment,old_user,old_user_text,old_timestamp," .
 421                           "old_minor_edit,inverse_timestamp) VALUES (" .
 422                           $this->mTitle->getNamespace() . ", '" .
 423                           wfStrencode( $this->mTitle->getDBkey() ) . "', '" .
 424                           wfStrencode( $oldtext ) . "', '" .
 425                           wfStrencode( $this->getComment() ) . "', " .
 426                           $this->getUser() . ", '" .
 427                           wfStrencode( $this->getUserText() ) . "', '" .
 428                           $this->getTimestamp() . "', " . $me1 . ", '" .
 429                           wfInvertTimestamp( $this->getTimestamp() ) . "')";
 430                         $res = wfQuery( $sql, DB_WRITE, $fname );
 431                         $oldid = wfInsertID( $res );
 432
 433                         $sql = "INSERT INTO recentchanges (rc_timestamp,rc_cur_time," .
 434                           "rc_namespace,rc_title,rc_new,rc_minor,rc_bot,rc_cur_id,rc_user," .
 435                           "rc_user_text,rc_comment,rc_this_oldid,rc_last_oldid) VALUES (" .
 436                           "'{$now}','{$now}'," . $this->mTitle->getNamespace() . ",'" .
 437                           wfStrencode( $this->mTitle->getDBkey() ) . "',0,{$me2}," .
 438                           ( $wgUser->isBot() ? 1 : 0 ) . "," .
 439                           $this->getID() . "," . $wgUser->getID() . ",'" .
 440                           wfStrencode( $wgUser->getName() ) . "','" .
 441                           wfStrencode( $summary ) . "',0,{$oldid})";
 442                         wfQuery( $sql, DB_WRITE, $fname );
 443
 444                         $sql = "UPDATE recentchanges SET rc_this_oldid={$oldid} " .
 445                           "WHERE rc_namespace=" . $this->mTitle->getNamespace() . " AND " .
 446                           "rc_title='" . wfStrencode( $this->mTitle->getDBkey() ) . "' AND " .
 447                           "rc_timestamp='" . $this->getTimestamp() . "'";
 448                         wfQuery( $sql, DB_WRITE, $fname );
 449
 450                         $sql = "UPDATE recentchanges SET rc_cur_time='{$now}' " .
 451                           "WHERE rc_cur_id=" . $this->getID();
 452                         wfQuery( $sql, DB_WRITE, $fname );
 453                 }
 454                 if( $wgDBtransactions ) {
 455                         $sql = "COMMIT";
 456                         wfQuery( $sql, DB_WRITE );
 457                 }
 458
 459                 if ($watchthis) {
 460                         if (!$this->mTitle->userIsWatching()) $this->watch();
 461                 } else {
 462                         if ( $this->mTitle->userIsWatching() ) {
 463                                 $this->unwatch();
 464                         }
 465                 }
 466
 467                 $this->showArticle( $text, wfMsg( "updated" ) );
 468                 return true;
 469         }
 470
 471         # After we've either updated or inserted the article, update
 472         # the link tables and redirect to the new page.
 473
 474         function showArticle( $text, $subtitle )
 475         {
 476                 global $wgOut, $wgUser, $wgLinkCache, $wgUseBetterLinksUpdate;
 477                 global $wgMwRedir;
 478
 479                 $wgLinkCache = new LinkCache();
 480
 481                 # Get old version of link table to allow incremental link updates
 482                 if ( $wgUseBetterLinksUpdate ) {
 483                         $wgLinkCache->preFill( $this->mTitle );
 484                         $wgLinkCache->clear();
 485                 }
 486
 487                 # Now update the link cache by parsing the text
 488                 $wgOut = new OutputPage();
 489                 $wgOut->addWikiText( $text );
 490
 491                 $this->editUpdates( $text );
 492                 if( $wgMwRedir->matchStart( $text ) )
 493                         $r = "redirect=no";
 494                 else
 495                         $r = "";
 496                 $wgOut->redirect( wfLocalUrl( $this->mTitle->getPrefixedURL(), $r ) );
 497         }
 498
 499         # Add this page to my watchlist
 500
 501         function watch( $add = true )
 502         {
 503                 global $wgUser, $wgOut, $wgLang;
 504                 global $wgDeferredUpdateList;
 505
 506                 if ( 0 == $wgUser->getID() ) {
 507                         $wgOut->errorpage( "watchnologin", "watchnologintext" );
 508                         return;
 509                 }
 510                 if ( wfReadOnly() ) {
 511                         $wgOut->readOnlyPage();
 512                         return;
 513                 }
 514                 if( $add )
 515                         $wgUser->addWatch( $this->mTitle );
 516                 else
 517                         $wgUser->removeWatch( $this->mTitle );
 518
 519                 $wgOut->setPagetitle( wfMsg( $add ? "addedwatch" : "removedwatch" ) );
 520                 $wgOut->setRobotpolicy( "noindex,follow" );
 521
 522                 $sk = $wgUser->getSkin() ;
 523                 $link = $sk->makeKnownLink ( $this->mTitle->getPrefixedText() ) ;
 524
 525                 if($add)
 526                         $text = wfMsg( "addedwatchtext", $link );
 527                 else
 528                         $text = wfMsg( "removedwatchtext", $link );
 529                 $wgOut->addHTML( $text );
 530
 531                 $up = new UserUpdate();
 532                 array_push( $wgDeferredUpdateList, $up );
 533
 534                 $wgOut->returnToMain( false );
 535         }
 536
 537         function unwatch()
 538         {
 539                 $this->watch( false );
 540         }
 541
 542         # This shares a lot of issues (and code) with Recent Changes
 543
 544         function history()
 545         {
 546                 global $wgUser, $wgOut, $wgLang, $offset, $limit;
 547
 548                 # If page hasn't changed, client can cache this
 549
 550                 $wgOut->checkLastModified( $this->getTimestamp() );
 551                 $fname = "Article::history";
 552                 wfProfileIn( $fname );
 553
 554                 $wgOut->setPageTitle( $this->mTitle->getPRefixedText() );
 555                 $wgOut->setSubtitle( wfMsg( "revhistory" ) );
 556                 $wgOut->setArticleFlag( false );
 557                 $wgOut->setRobotpolicy( "noindex,nofollow" );
 558
 559                 if( $this->mTitle->getArticleID() == 0 ) {
 560                         $wgOut->addHTML( wfMsg( "nohistory" ) );
 561                         wfProfileOut( $fname );
 562                         return;
 563                 }
 564
 565                 $offset = (int)$offset;
 566                 $limit = (int)$limit;
 567                 if( $limit == 0 ) $limit = 50;
 568                 $namespace = $this->mTitle->getNamespace();
 569                 $title = $this->mTitle->getText();
 570                 $sql = "SELECT old_id,old_user," .
 571                   "old_comment,old_user_text,old_timestamp,old_minor_edit ".
 572                   "FROM old USE INDEX (name_title_timestamp) " .
 573                   "WHERE old_namespace={$namespace} AND " .
 574                   "old_title='" . wfStrencode( $this->mTitle->getDBkey() ) . "' " .
 575                   "ORDER BY inverse_timestamp LIMIT $offset, $limit";
 576                 $res = wfQuery( $sql, DB_READ, "Article::history" );
 577
 578                 $revs = wfNumRows( $res );
 579                 if( $this->mTitle->getArticleID() == 0 ) {
 580                         $wgOut->addHTML( wfMsg( "nohistory" ) );
 581                         wfProfileOut( $fname );
 582                         return;
 583                 }
 584
 585                 $sk = $wgUser->getSkin();
 586                 $numbar = wfViewPrevNext(
 587                         $offset, $limit,
 588                         $this->mTitle->getPrefixedText(),
 589                         "action=history" );
 590                 $s = $numbar;
 591                 $s .= $sk->beginHistoryList();
 592
 593                 if($offset == 0 )
 594                 $s .= $sk->historyLine( $this->getTimestamp(), $this->getUser(),
 595                   $this->getUserText(), $namespace,
 596                   $title, 0, $this->getComment(),
 597                   ( $this->getMinorEdit() > 0 ) );
 598
 599                 $revs = wfNumRows( $res );
 600                 while ( $line = wfFetchObject( $res ) ) {
 601                         $s .= $sk->historyLine( $line->old_timestamp, $line->old_user,
 602                           $line->old_user_text, $namespace,
 603                           $title, $line->old_id,
 604                           $line->old_comment, ( $line->old_minor_edit > 0 ) );
 605                 }
 606                 $s .= $sk->endHistoryList();
 607                 $s .= $numbar;
 608                 $wgOut->addHTML( $s );
 609                 wfProfileOut( $fname );
 610         }
 611
 612         function protect( $limit = "sysop" )
 613         {
 614                 global $wgUser, $wgOut;
 615
 616                 if ( ! $wgUser->isSysop() ) {
 617                         $wgOut->sysopRequired();
 618                         return;
 619                 }
 620                 if ( wfReadOnly() ) {
 621                         $wgOut->readOnlyPage();
 622                         return;
 623                 }
 624                 $id = $this->mTitle->getArticleID();
 625                 if ( 0 == $id ) {
 626                         $wgOut->fatalEror( wfMsg( "badarticleerror" ) );
 627                         return;
 628                 }
 629         $sql = "UPDATE cur SET cur_touched='" . wfTimestampNow() . "'," .
 630                         "cur_restrictions='{$limit}' WHERE cur_id={$id}";
 631                 wfQuery( $sql, DB_WRITE, "Article::protect" );
 632
 633                 $wgOut->redirect( wfLocalUrl( $this->mTitle->getPrefixedURL() ) );
 634         }
 635
 636         function unprotect()
 637         {
 638                 return $this->protect( "" );
 639         }
 640
 641         function delete()
 642         {
 643                 global $wgUser, $wgOut;
 644                 global $wpConfirm, $wpReason, $image, $oldimage;
 645
 646                 # Anybody can delete old revisions of images; only sysops
 647                 # can delete articles and current images
 648
 649                 if ( ( ! $oldimage ) && ( ! $wgUser->isSysop() ) ) {
 650                         $wgOut->sysopRequired();
 651                         return;
 652                 }
 653                 if ( wfReadOnly() ) {
 654                         $wgOut->readOnlyPage();
 655                         return;
 656                 }
 657
 658                 # Better double-check that it hasn't been deleted yet!
 659                 $wgOut->setPagetitle( wfMsg( "confirmdelete" ) );
 660                 if ( ( "" == trim( $this->mTitle->getText() ) )
 661                   or ( $this->mTitle->getArticleId() == 0 ) ) {
 662                         $wgOut->fatalError( wfMsg( "cannotdelete" ) );
 663                         return;
 664                 }
 665
 666                 # determine whether this page has earlier revisions
 667                 # and insert a warning if it does
 668                 # we select the text because it might be useful below
 669                 $sql="SELECT old_text FROM old WHERE old_namespace=0 and old_title='" . wfStrencode($this->mTitle->getPrefixedDBkey())."' ORDER BY inverse_timestamp LIMIT 1";
 670                 $res=wfQuery($sql, DB_READ, $fname);
 671                 if( ($old=wfFetchObject($res)) && !$wpConfirm ) {
 672                         $skin=$wgUser->getSkin();
 673                         $wgOut->addHTML("<B>".wfMsg("historywarning"));
 674                         $wgOut->addHTML( $skin->historyLink() ."</B><P>");
 675                 }
 676
 677                 $sql="SELECT cur_text FROM cur WHERE cur_namespace=0 and cur_title='" . wfStrencode($this->mTitle->getPrefixedDBkey())."'";
 678                 $res=wfQuery($sql, DB_READ, $fname);
 679                 if( ($s=wfFetchObject($res))) {
 680
 681                         # if this is a mini-text, we can paste part of it into the deletion reason
 682
 683                         #if this is empty, an earlier revision may contain "useful" text
 684                         if($s->cur_text!="") {
 685                                 $text=$s->cur_text;
 686                         } else {
 687                                 if($old) {
 688                                         $text=$old->old_text;
 689                                         $blanked=1;
 690                                 }
 691
 692                         }
 693
 694                         $length=strlen($text);
 695
 696                         # this should not happen, since it is not possible to store an empty, new
 697                         # page. Let's insert a standard text in case it does, though
 698                         if($length==0 && !$wpReason) { $wpReason=wfmsg("exblank");}
 699
 700
 701                         if($length < 500 && !$wpReason) {
 702
 703                                 # comment field=255, let's grep the first 150 to have some user
 704                                 # space left
 705                                 $text=substr($text,0,150);
 706                                 # let's strip out newlines and HTML tags
 707                                 $text=preg_replace("/\"/","'",$text);
 708                                 $text=preg_replace("/\</","&lt;",$text);
 709                                 $text=preg_replace("/\>/","&gt;",$text);
 710                                 $text=preg_replace("/[\n\r]/","",$text);
 711                                 if(!$blanked) {
 712                                         $wpReason=wfMsg("excontent"). " '".$text;
 713                                 } else {
 714                                         $wpReason=wfMsg("exbeforeblank") . " '".$text;
 715                                 }
 716                                 if($length>150) { $wpReason .= "..."; } # we've only pasted part of the text
 717                                 $wpReason.="'";
 718                         }
 719                 }
 720
 721                 return $this->confirmDelete();
 722         }
 723
 724         function confirmDelete( $par = "" )
 725         {
 726                 global $wgOut;
 727
 728                 $sub = htmlspecialchars( $this->mTitle->getPrefixedText() );
 729                 $wgOut->setSubtitle( wfMsg( "deletesub", $sub ) );
 730                 $wgOut->setRobotpolicy( "noindex,nofollow" );
 731                 $wgOut->addWikiText( wfMsg( "confirmdeletetext" ) );
 732
 733                 $t = $this->mTitle->getPrefixedURL();
 734
 735                 $formaction = wfEscapeHTML( wfLocalUrl( $t, "action=delete" . $par ) );
 736                 $confirm = wfMsg( "confirm" );
 737                 $check = wfMsg( "confirmcheck" );
 738                 $delcom = wfMsg( "deletecomment" );
 739
 740                 $wgOut->addHTML( "
 741 <form id=\"deleteconfirm\" method=\"post\" action=\"{$formaction}\">
 742 <table border=0><tr><td align=right>
 743 {$delcom}:</td><td align=left>
 744 <input type=text size=60 name=\"wpReason\" value=\"{$wpReason}\">
 745 </td></tr><tr><td>&nbsp;</td></tr>
 746 <tr><td align=right>
 747 <input type=checkbox name=\"wpConfirm\" value='1' id=\"wpConfirm\">
 748 </td><td><label for=\"wpConfirm\">{$check}</label></td>
 749 </tr><tr><td>&nbsp;</td><td>
 750 <input type=submit name=\"wpConfirmB\" value=\"{$confirm}\">
 751 </td></tr></table></form>\n" );
 752
 753                 $wgOut->returnToMain( false );
 754         }
 755
 756         function doDelete()
 757         {
 758                 global $wgOut, $wgUser, $wgLang;
 759                 global $wpReason;
 760                 $fname = "Article::doDelete";
 761
 762                 $this->doDeleteArticle( $this->mTitle );
 763                 $deleted = $this->mTitle->getPrefixedText();
 764
 765                 $wgOut->setPagetitle( wfMsg( "actioncomplete" ) );
 766                 $wgOut->setRobotpolicy( "noindex,nofollow" );
 767
 768                 $sk = $wgUser->getSkin();
 769                 $loglink = $sk->makeKnownLink( $wgLang->getNsText(
 770                   Namespace::getWikipedia() ) .
 771                   ":" . wfMsg( "dellogpage" ), wfMsg( "deletionlog" ) );
 772
 773                 $text = str_replace( "$1" , $deleted, wfMsg( "deletedtext" ) );
 774                 $text = str_replace( "$2", $loglink, $text );
 775
 776                 $wgOut->addHTML( "<p>" . $text );
 777                 $wgOut->returnToMain( false );
 778         }
 779
 780         function doDeleteArticle( $title )
 781         {
 782                 global $wgUser, $wgOut, $wgLang, $wpReason, $wgDeferredUpdateList;
 783
 784                 $fname = "Article::doDeleteArticle";
 785                 $ns = $title->getNamespace();
 786                 $t = wfStrencode( $title->getDBkey() );
 787                 $id = $title->getArticleID();
 788
 789                 if ( "" == $t ) {
 790                         $wgOut->fatalError( wfMsg( "cannotdelete" ) );
 791                         return;
 792                 }
 793
 794                 $u = new SiteStatsUpdate( 0, 1, -$this->isCountable( $this->getContent( true ) ) );
 795                 array_push( $wgDeferredUpdateList, $u );
 796
 797                 # Move article and history to the "archive" table
 798                 $sql = "INSERT INTO archive (ar_namespace,ar_title,ar_text," .
 799                   "ar_comment,ar_user,ar_user_text,ar_timestamp,ar_minor_edit," .
 800                   "ar_flags) SELECT cur_namespace,cur_title,cur_text,cur_comment," .
 801                   "cur_user,cur_user_text,cur_timestamp,cur_minor_edit,0 FROM cur " .
 802                   "WHERE cur_namespace={$ns} AND cur_title='{$t}'";
 803                 wfQuery( $sql, DB_WRITE, $fname );
 804
 805                 $sql = "INSERT INTO archive (ar_namespace,ar_title,ar_text," .
 806                   "ar_comment,ar_user,ar_user_text,ar_timestamp,ar_minor_edit," .
 807                   "ar_flags) SELECT old_namespace,old_title,old_text,old_comment," .
 808                   "old_user,old_user_text,old_timestamp,old_minor_edit,old_flags " .
 809                   "FROM old WHERE old_namespace={$ns} AND old_title='{$t}'";
 810                 wfQuery( $sql, DB_WRITE, $fname );
 811
 812                 # Now that it's safely backed up, delete it
 813
 814                 $sql = "DELETE FROM cur WHERE cur_namespace={$ns} AND " .
 815                   "cur_title='{$t}'";
 816                 wfQuery( $sql, DB_WRITE, $fname );
 817
 818                 $sql = "DELETE FROM old WHERE old_namespace={$ns} AND " .
 819                   "old_title='{$t}'";
 820                 wfQuery( $sql, DB_WRITE, $fname );
 821
 822                 $sql = "DELETE FROM recentchanges WHERE rc_namespace={$ns} AND " .
 823                   "rc_title='{$t}'";
 824         wfQuery( $sql, DB_WRITE, $fname );
 825
 826                 # Finally, clean up the link tables
 827
 828                 if ( 0 != $id ) {
 829                         $t = wfStrencode( $title->getPrefixedDBkey() );
 830                         $sql = "SELECT l_from FROM links WHERE l_to={$id}";
 831                         $res = wfQuery( $sql, DB_READ, $fname );
 832
 833                         $sql = "INSERT INTO brokenlinks (bl_from,bl_to) VALUES ";
 834             $now = wfTimestampNow();
 835                         $sql2 = "UPDATE cur SET cur_touched='{$now}' WHERE cur_id IN (";
 836                         $first = true;
 837
 838                         while ( $s = wfFetchObject( $res ) ) {
 839                                 $nt = Title::newFromDBkey( $s->l_from );
 840                                 $lid = $nt->getArticleID();
 841
 842                                 if ( ! $first ) { $sql .= ","; $sql2 .= ","; }
 843                                 $first = false;
 844                                 $sql .= "({$lid},'{$t}')";
 845                                 $sql2 .= "{$lid}";
 846                         }
 847                         $sql2 .= ")";
 848                         if ( ! $first ) {
 849                                 wfQuery( $sql, DB_WRITE, $fname );
 850                                 wfQuery( $sql2, DB_WRITE, $fname );
 851                         }
 852                         wfFreeResult( $res );
 853
 854                         $sql = "DELETE FROM links WHERE l_to={$id}";
 855                         wfQuery( $sql, DB_WRITE, $fname );
 856
 857                         $sql = "DELETE FROM links WHERE l_from='{$t}'";
 858                         wfQuery( $sql, DB_WRITE, $fname );
 859
 860                         $sql = "DELETE FROM imagelinks WHERE il_from='{$t}'";
 861                         wfQuery( $sql, DB_WRITE, $fname );
 862
 863                         $sql = "DELETE FROM brokenlinks WHERE bl_from={$id}";
 864                         wfQuery( $sql, DB_WRITE, $fname );
 865                 }
 866
 867                 $log = new LogPage( wfMsg( "dellogpage" ), wfMsg( "dellogpagetext" ) );
 868                 $art = $title->getPrefixedText();
 869                 $wpReason = wfCleanQueryVar( $wpReason );
 870                 $log->addEntry( str_replace( "$1", $art, wfMsg( "deletedarticle" ) ), $wpReason );
 871
 872                 # Clear the cached article id so the interface doesn't act like we exist
 873                 $this->mTitle->resetArticleID( 0 );
 874                 $this->mTitle->mArticleID = 0;
 875         }
 876
 877         function rollback()
 878         {
 879                 global $wgUser, $wgLang, $wgOut, $from;
 880
 881                 if ( ! $wgUser->isSysop() ) {
 882                         $wgOut->sysopRequired();
 883                         return;
 884                 }
 885
 886                 # Replace all this user's current edits with the next one down
 887                 $tt = wfStrencode( $this->mTitle->getDBKey() );
 888                 $n = $this->mTitle->getNamespace();
 889
 890                 # Get the last editor
 891                 $sql = "SELECT cur_id,cur_user,cur_user_text,cur_comment FROM cur WHERE cur_title='{$tt}' AND cur_namespace={$n}";
 892                 $res = wfQuery( $sql, DB_READ );
 893                 if( ($x = wfNumRows( $res )) != 1 ) {
 894                         # Something wrong
 895                         $wgOut->addHTML( wfMsg( "notanarticle" ) );
 896                         return;
 897                 }
 898                 $s = wfFetchObject( $res );
 899                 $ut = wfStrencode( $s->cur_user_text );
 900                 $uid = $s->cur_user;
 901                 $pid = $s->cur_id;
 902
 903                 $from = str_replace( '_', ' ', wfCleanQueryVar( $from ) );
 904                 if( $from != $s->cur_user_text ) {
 905                         $wgOut->setPageTitle(wfmsg("rollbackfailed"));
 906                         $wgOut->addWikiText( wfMsg( "alreadyrolled",
 907                                 htmlspecialchars( $this->mTitle->getPrefixedText()),
 908                                 htmlspecialchars( $from ),
 909                                 htmlspecialchars( $s->cur_user_text ) ) );
 910                         if($s->cur_comment != "") {
 911                                 $wgOut->addHTML(
 912                                         wfMsg("editcomment",
 913                                         htmlspecialchars( $s->cur_comment ) ) );
 914                                 }
 915                         return;
 916                 }
 917
 918                 # Get the last edit not by this guy
 919                 $sql = "SELECT old_text,old_user,old_user_text
 920                 FROM old USE INDEX (name_title_timestamp)
 921                 WHERE old_namespace={$n} AND old_title='{$tt}'
 922                 AND (old_user <> {$uid} OR old_user_text <> '{$ut}')
 923                 ORDER BY inverse_timestamp LIMIT 1";
 924                 $res = wfQuery( $sql, DB_READ );
 925                 if( wfNumRows( $res ) != 1 ) {
 926                         # Something wrong
 927                         $wgOut->setPageTitle(wfMsg("rollbackfailed"));
 928                         $wgOut->addHTML( wfMsg( "cantrollback" ) );
 929                         return;
 930                 }
 931                 $s = wfFetchObject( $res );
 932
 933                 # Save it!
 934                 $newcomment = str_replace( "$1", $s->old_user_text, wfMsg( "revertpage" ) );
 935                 $wgOut->setPagetitle( wfMsg( "actioncomplete" ) );
 936                 $wgOut->setRobotpolicy( "noindex,nofollow" );
 937                 $wgOut->addHTML( "<h2>" . $newcomment . "</h2>\n<hr>\n" );
 938                 $this->updateArticle( $s->old_text, $newcomment, 1, $this->mTitle->userIsWatching() );
 939
 940                 $wgOut->returnToMain( false );
 941         }
 942
 943
 944         # Do standard deferred updates after page view
 945
 946         /* private */ function viewUpdates()
 947         {
 948                 global $wgDeferredUpdateList;
 949
 950                 if ( 0 != $this->getID() ) {
 951                         $u = new ViewCountUpdate( $this->getID() );
 952                         array_push( $wgDeferredUpdateList, $u );
 953                         $u = new SiteStatsUpdate( 1, 0, 0 );
 954                         array_push( $wgDeferredUpdateList, $u );
 955
 956                         $u = new UserTalkUpdate( 0, $this->mTitle->getNamespace(),
 957                           $this->mTitle->getDBkey() );
 958                         array_push( $wgDeferredUpdateList, $u );
 959                 }
 960         }
 961
 962         # Do standard deferred updates after page edit.
 963         # Every 1000th edit, prune the recent changes table.
 964
 965         /* private */ function editUpdates( $text )
 966         {
 967                 global $wgDeferredUpdateList, $wgDBname, $wgMemc;
 968
 969                 wfSeedRandom();
 970                 if ( 0 == mt_rand( 0, 999 ) ) {
 971                         $cutoff = wfUnix2Timestamp( time() - ( 7 * 86400 ) );
 972                         $sql = "DELETE FROM recentchanges WHERE rc_timestamp < '{$cutoff}'";
 973                         wfQuery( $sql, DB_WRITE );
 974                 }
 975                 $id = $this->getID();
 976                 $title = $this->mTitle->getPrefixedDBkey();
 977                 $adj = $this->mCountAdjustment;
 978
 979                 if ( 0 != $id ) {
 980                         $u = new LinksUpdate( $id, $title );
 981                         array_push( $wgDeferredUpdateList, $u );
 982                         $u = new SiteStatsUpdate( 0, 1, $adj );
 983                         array_push( $wgDeferredUpdateList, $u );
 984                         $u = new SearchUpdate( $id, $title, $text );
 985                         array_push( $wgDeferredUpdateList, $u );
 986
 987                         $u = new UserTalkUpdate( 1, $this->mTitle->getNamespace(),
 988                           $this->mTitle->getDBkey() );
 989                         array_push( $wgDeferredUpdateList, $u );
 990
 991                         if ( $this->getNamespace == NS_MEDIAWIKI ) {
 992                                 $wgMemc->delete( "$wgDBname:messages" );
 993                         }
 994                 }
 995         }
 996
 997         /* private */ function setOldSubtitle()
 998         {
 999                 global $wgLang, $wgOut;
1000
1001                 $td = $wgLang->timeanddate( $this->mTimestamp, true );
1002                 $r = str_replace( "$1", "{$td}", wfMsg( "revisionasof" ) );
1003                 $wgOut->setSubtitle( "({$r})" );
1004         }
1005
1006         # This function is called right before saving the wikitext,
1007         # so we can do things like signatures and links-in-context.
1008
1009         function preSaveTransform( $text )
1010         {
1011                 $s = "";
1012                 while ( "" != $text ) {
1013                         $p = preg_split( "/<\\s*nowiki\\s*>/i", $text, 2 );
1014                         $s .= $this->pstPass2( $p[0] );
1015
1016                         if ( ( count( $p ) < 2 ) || ( "" == $p[1] ) ) { $text = ""; }
1017                         else {
1018                                 $q = preg_split( "/<\\/\\s*nowiki\\s*>/i", $p[1], 2 );
1019                                 $s .= "<nowiki>{$q[0]}</nowiki>";
1020                                 $text = $q[1];
1021                         }
1022                 }
1023                 return rtrim( $s );
1024         }
1025
1026         /* private */ function pstPass2( $text )
1027         {
1028                 global $wgUser, $wgLang, $wgLocaltimezone;
1029
1030                 # Signatures
1031                 #
1032                 $n = $wgUser->getName();
1033                 $k = $wgUser->getOption( "nickname" );
1034                 if ( "" == $k ) { $k = $n; }
1035                 if(isset($wgLocaltimezone)) {
1036                         $oldtz = getenv("TZ"); putenv("TZ=$wgLocaltimezone");
1037                 }
1038                 /* Note: this is an ugly timezone hack for the European wikis */
1039                 $d = $wgLang->timeanddate( date( "YmdHis" ), false ) .
1040                   " (" . date( "T" ) . ")";
1041                 if(isset($wgLocaltimezone)) putenv("TZ=$oldtz");
1042
1043                 $text = preg_replace( "/~~~~/", "[[" . $wgLang->getNsText(
1044                   Namespace::getUser() ) . ":$n|$k]] $d", $text );
1045                 $text = preg_replace( "/~~~/", "[[" . $wgLang->getNsText(
1046                   Namespace::getUser() ) . ":$n|$k]]", $text );
1047
1048                 # Context links: [[|name]] and [[name (context)|]]
1049                 #
1050                 $tc = "[&;%\\-,.\\(\\)' _0-9A-Za-z\\/:\\x80-\\xff]";
1051                 $np = "[&;%\\-,.' _0-9A-Za-z\\/:\\x80-\\xff]"; # No parens
1052                 $conpat = "/^({$np}+) \\(({$tc}+)\\)$/";
1053
1054                 $p1 = "/\[\[({$np}+) \\(({$np}+)\\)\\|]]/";             # [[page (context)|]]
1055                 $p2 = "/\[\[\\|({$tc}+)]]/";                                    # [[|page]]
1056                 $p3 = "/\[\[([A-Za-z _]+):({$np}+)\\|]]/";              # [[namespace:page|]]
1057                 $p4 = "/\[\[([A-Aa-z _]+):({$np}+) \\(({$np}+)\\)\\|]]/";
1058                                                                                                                 # [[ns:page (cont)|]]
1059                 $context = "";
1060                 $t = $this->mTitle->getText();
1061                 if ( preg_match( $conpat, $t, $m ) ) {
1062                         $context = $m[2];
1063                 }
1064                 $text = preg_replace( $p4, "[[\\1:\\2 (\\3)|\\2]]", $text );
1065                 $text = preg_replace( $p1, "[[\\1 (\\2)|\\1]]", $text );
1066                 $text = preg_replace( $p3, "[[\\1:\\2|\\2]]", $text );
1067
1068                 if ( "" == $context ) {
1069                         $text = preg_replace( $p2, "[[\\1]]", $text );
1070                 } else {
1071                         $text = preg_replace( $p2, "[[\\1 ({$context})|\\1]]", $text );
1072                 }
1073
1074                 # {{SUBST:xxx}} variables
1075                 #
1076                 $mw =& MagicWord::get( MAG_SUBST );
1077                 $text = $mw->substituteCallback( $text, "replaceMsgVar" );
1078
1079                 return $text;
1080         }
1081
1082         /* Caching functions */
1083
1084         function tryFileCache() {
1085                 if($this->isFileCacheable()) {
1086                         $touched = $this->mTouched;
1087                         if( strpos( $this->mContent, "{{" ) !== false ) {
1088                                 # Expire pages with variable replacements in an hour
1089                                 $expire = wfUnix2Timestamp( time() - 3600 );
1090                                 $touched = max( $expire, $touched );
1091                         }
1092                         $cache = new CacheManager( $this->mTitle );
1093                         if($cache->isFileCacheGood( $touched )) {
1094                                 wfDebug( " tryFileCache() - about to load\n" );
1095                                 $cache->loadFromFileCache();
1096                                 exit;
1097                         } else {
1098                                 wfDebug( " tryFileCache() - starting buffer\n" );
1099                                 if($cache->useGzip() && wfClientAcceptsGzip()) {
1100                                         /* For some reason, adding this header line over in
1101                                            CacheManager::saveToFileCache() fails on my test
1102                                            setup at home, though it works on the live install.
1103                                            Make double-sure...  --brion */
1104                                         header( "Content-Encoding: gzip" );
1105                                 }
1106                                 ob_start( array(&$cache, 'saveToFileCache' ) );
1107                         }
1108                 } else {
1109                         wfDebug( " tryFileCache() - not cacheable\n" );
1110                 }
1111         }
1112
1113         function isFileCacheable() {
1114                 global $wgUser, $wgUseFileCache, $wgShowIPinHeader;
1115                 global $action, $oldid, $diff, $redirect, $printable;
1116                 return $wgUseFileCache
1117                         and (!$wgShowIPinHeader)
1118                         and ($this->getID() != 0)
1119                         and ($wgUser->getId() == 0)
1120                         and (!$wgUser->getNewtalk())
1121                         and ($this->mTitle->getNamespace != Namespace::getSpecial())
1122                         and ($action == "view")
1123                         and (!isset($oldid))
1124                         and (!isset($diff))
1125                         and (!isset($redirect))
1126                         and (!isset($printable))
1127                         and (!$this->mRedirectedFrom);
1128
1129         }
1130
1131
1132 }
1133
1134 ?>