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 /* CHECK MERGE @@@
   9    TEST THIS @@@
  10
  11    * s/\$wgTitle/\$this->mTitle/ performed, many replacements
  12    * mTitle variable added to class
  13 */
  14
  15 include_once( "CacheManager.php" );
  16
  17 class Article {
  18         /* private */ var $mContent, $mContentLoaded;
  19         /* private */ var $mUser, $mTimestamp, $mUserText;
  20         /* private */ var $mCounter, $mComment, $mCountAdjustment;
  21         /* private */ var $mMinorEdit, $mRedirectedFrom;
  22         /* private */ var $mTouched, $mFileCache, $mTitle;
  23
  24         function Article( &$title ) {
  25                 $this->mTitle =& $title;
  26                 $this->clear();
  27         }
  28
  29         /* private */ function clear()
  30         {
  31                 $this->mContentLoaded = false;
  32                 $this->mUser = $this->mCounter = -1; # Not loaded
  33                 $this->mRedirectedFrom = $this->mUserText =
  34                 $this->mTimestamp = $this->mComment = $this->mFileCache = "";
  35                 $this->mCountAdjustment = 0;
  36                 $this->mTouched = "19700101000000";
  37         }
  38
  39         # Note that getContent/loadContent may follow redirects if
  40         # not told otherwise, and so may cause a change to mTitle.
  41
  42         function getContent( $noredir = false )
  43         {
  44                 global $action,$section,$count; # From query string
  45                 $section = $_REQUEST["section"];
  46                 $count   = $_REQUEST['count'];
  47                 $fname =  "Article::getContent";
  48                 wfProfileIn( $fname );
  49
  50                 if ( 0 == $this->getID() ) {
  51                         if ( "edit" == $action ) {
  52                                 wfProfileOut( $fname );
  53                                 return ""; # was "newarticletext", now moved above the box)
  54                         }
  55                         wfProfileOut( $fname );
  56                         return wfMsg( "noarticletext" );
  57                 } else {
  58                         $this->loadContent( $noredir );
  59
  60                         if(
  61                                 # check if we're displaying a [[User talk:x.x.x.x]] anonymous talk page
  62                                 ( $this->mTitle->getNamespace() == Namespace::getTalk( Namespace::getUser()) ) &&
  63                                   preg_match("/^\d{1,3}\.\d{1,3}.\d{1,3}\.\d{1,3}$/",$this->mTitle->getText()) &&
  64                                   $action=="view"
  65                                 )
  66                                 {
  67                                 wfProfileOut( $fname );
  68                                 return $this->mContent . "\n" .wfMsg("anontalkpagetext"); }
  69                         else {
  70                                 if($action=="edit") {
  71                                         if($section!="") {
  72                                                 if($section=="new") {
  73                                                         wfProfileOut( $fname );
  74                                                         return "";
  75                                                 }
  76
  77                                                 $secs=preg_split("/(^=+.*?=+|^<h[1-6].*?>.*?<\/h[1-6].*?>)/mi",
  78                                                  $this->mContent, -1,
  79                                                  PREG_SPLIT_DELIM_CAPTURE);
  80                                                 if($section==0) {
  81                                                         wfProfileOut( $fname );
  82                                                         return trim($secs[0]);
  83                                                 } else {
  84                                                         wfProfileOut( $fname );
  85                                                         return trim($secs[$section*2-1] . $secs[$section*2]);
  86                                                 }
  87                                         }
  88                                 }
  89                                 wfProfileOut( $fname );
  90                                 return $this->mContent;
  91                         }
  92                 }
  93         }
  94
  95         function loadContent( $noredir = false )
  96         {
  97                 global $wgOut, $wgMwRedir;
  98                 global $oldid, $redirect; # From query
  99
 100                 if ( $this->mContentLoaded ) return;
 101                 $fname = "Article::loadContent";
 102
 103                 # Pre-fill content with error message so that if something
 104                 # fails we'll have something telling us what we intended.
 105
 106                 $t = $this->mTitle->getPrefixedText();
 107                 if ( isset( $oldid ) ) {
 108                         $oldid = IntVal( $oldid );
 109                         $t .= ",oldid={$oldid}";
 110                 }
 111                 if ( isset( $redirect ) ) {
 112                         $redirect = ($redirect == "no") ? "no" : "yes";
 113                         $t .= ",redirect={$redirect}";
 114                 }
 115                 $this->mContent = wfMsg( "missingarticle", $t );
 116
 117                 if ( ! $oldid ) {       # Retrieve current version
 118                         $id = $this->getID();
 119                         if ( 0 == $id ) return;
 120
 121                         $sql = "SELECT " .
 122                           "cur_text,cur_timestamp,cur_user,cur_counter,cur_restrictions,cur_touched " .
 123                           "FROM cur WHERE cur_id={$id}";
 124                         wfDebug( "$sql\n" );
 125                         $res = wfQuery( $sql, DB_READ, $fname );
 126                         if ( 0 == wfNumRows( $res ) ) {
 127                                 return;
 128                         }
 129
 130                         $s = wfFetchObject( $res );
 131                         # If we got a redirect, follow it (unless we've been told
 132                         # not to by either the function parameter or the query
 133                         if ( ( "no" != $redirect ) && ( false == $noredir ) &&
 134                           ( $wgMwRedir->matchStart( $s->cur_text ) ) ) {
 135                                 if ( preg_match( "/\\[\\[([^\\]\\|]+)[\\]\\|]/",
 136                                   $s->cur_text, $m ) ) {
 137                                         $rt = Title::newFromText( $m[1] );
 138
 139                                         # Gotta hand redirects to special pages differently:
 140                                         # Fill the HTTP response "Location" header and ignore
 141                                         # the rest of the page we're on.
 142
 143                                         if ( $rt->getInterwiki() != "" ) {
 144                                                 $wgOut->redirect( $rt->getFullURL() ) ;
 145                                                 return;
 146                                         }
 147                                         if ( $rt->getNamespace() == Namespace::getSpecial() ) {
 148                                                 $wgOut->redirect( wfLocalUrl(
 149                                                   $rt->getPrefixedURL() ) );
 150                                                 return;
 151                                         }
 152                                         $rid = $rt->getArticleID();
 153                                         if ( 0 != $rid ) {
 154                                                 $sql = "SELECT cur_text,cur_timestamp,cur_user," .
 155                                                   "cur_counter,cur_restrictions,cur_touched FROM cur WHERE cur_id={$rid}";
 156                                                 $res = wfQuery( $sql, DB_READ, $fname );
 157
 158                                                 if ( 0 != wfNumRows( $res ) ) {
 159                                                         $this->mRedirectedFrom = $this->mTitle->getPrefixedText();
 160                                                         $this->mTitle = $rt;
 161                                                         $s = wfFetchObject( $res );
 162                                                 }
 163                                         }
 164                                 }
 165                         }
 166
 167                         $this->mContent = $s->cur_text;
 168                         $this->mUser = $s->cur_user;
 169                         $this->mCounter = $s->cur_counter;
 170                         $this->mTimestamp = $s->cur_timestamp;
 171                         $this->mTouched = $s->cur_touched;
 172                         $this->mTitle->mRestrictions = explode( ",", trim( $s->cur_restrictions ) );
 173                         $this->mTitle->mRestrictionsLoaded = true;
 174                         wfFreeResult( $res );
 175                 } else { # oldid set, retrieve historical version
 176                         $sql = "SELECT old_text,old_timestamp,old_user FROM old " .
 177                           "WHERE old_id={$oldid}";
 178                         $res = wfQuery( $sql, DB_READ, $fname );
 179                         if ( 0 == wfNumRows( $res ) ) { return; }
 180
 181                         $s = wfFetchObject( $res );
 182                         $this->mContent = $s->old_text;
 183                         $this->mUser = $s->old_user;
 184                         $this->mCounter = 0;
 185                         $this->mTimestamp = $s->old_timestamp;
 186                         wfFreeResult( $res );
 187                 }
 188                 $this->mContentLoaded = true;
 189         }
 190
 191         function getID() { return $this->mTitle->getArticleID(); }
 192
 193         function getCount()
 194         {
 195                 if ( -1 == $this->mCounter ) {
 196                         $id = $this->getID();
 197                         $this->mCounter = wfGetSQL( "cur", "cur_counter", "cur_id={$id}" );
 198                 }
 199                 return $this->mCounter;
 200         }
 201
 202         # Would the given text make this article a "good" article (i.e.,
 203         # suitable for including in the article count)?
 204
 205         function isCountable( $text )
 206         {
 207                 global $wgUseCommaCount, $wgMwRedir;
 208
 209                 if ( 0 != $this->mTitle->getNamespace() ) { return 0; }
 210                 if ( $wgMwRedir->matchStart( $text ) ) { return 0; }
 211                 $token = ($wgUseCommaCount ? "," : "[[" );
 212                 if ( false === strstr( $text, $token ) ) { return 0; }
 213                 return 1;
 214         }
 215
 216         # Load the field related to the last edit time of the article.
 217         # This isn't necessary for all uses, so it's only done if needed.
 218
 219         /* private */ function loadLastEdit()
 220         {
 221                 global $wgOut;
 222                 if ( -1 != $this->mUser ) return;
 223
 224                 $sql = "SELECT cur_user,cur_user_text,cur_timestamp," .
 225                   "cur_comment,cur_minor_edit FROM cur WHERE " .
 226                   "cur_id=" . $this->getID();
 227                 $res = wfQuery( $sql, DB_READ, "Article::loadLastEdit" );
 228
 229                 if ( wfNumRows( $res ) > 0 ) {
 230                         $s = wfFetchObject( $res );
 231                         $this->mUser = $s->cur_user;
 232                         $this->mUserText = $s->cur_user_text;
 233                         $this->mTimestamp = $s->cur_timestamp;
 234                         $this->mComment = $s->cur_comment;
 235                         $this->mMinorEdit = $s->cur_minor_edit;
 236                 }
 237         }
 238
 239         function getTimestamp()
 240         {
 241                 $this->loadLastEdit();
 242                 return $this->mTimestamp;
 243         }
 244
 245         function getUser()
 246         {
 247                 $this->loadLastEdit();
 248                 return $this->mUser;
 249         }
 250
 251         function getUserText()
 252         {
 253                 $this->loadLastEdit();
 254                 return $this->mUserText;
 255         }
 256
 257         function getComment()
 258         {
 259                 $this->loadLastEdit();
 260                 return $this->mComment;
 261         }
 262
 263         function getMinorEdit()
 264         {
 265                 $this->loadLastEdit();
 266                 return $this->mMinorEdit;
 267         }
 268
 269         # This is the default action of the script: just view the page of
 270         # the given title.
 271
 272         function view()
 273         {
 274                 global $wgUser, $wgOut, $wgLang;
 275                 global $oldid, $diff; # From query
 276                 global $wgLinkCache, $IP;
 277                 $fname = "Article::view";
 278                 wfProfileIn( $fname );
 279
 280                 $wgOut->setArticleFlag( true );
 281                 $wgOut->setRobotpolicy( "index,follow" );
 282
 283                 # If we got diff and oldid in the query, we want to see a
 284                 # diff page instead of the article.
 285
 286                 if ( isset( $diff ) ) {
 287                         $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
 288                         $de = new DifferenceEngine( $oldid, $diff );
 289                         $de->showDiffPage();
 290                         wfProfileOut( $fname );
 291                         return;
 292                 }
 293
 294                 if ( !isset( $oldid ) ) {
 295                         if( $this->checkTouched() ) {
 296                                 $wgOut->checkLastModified( $this->mTouched );
 297                                 $this->tryFileCache();
 298                         }
 299                 }
 300
 301                 $text = $this->getContent(); # May change mTitle
 302                 $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
 303                 $wgOut->setHTMLTitle( $this->mTitle->getPrefixedText() .
 304                   " - " . wfMsg( "wikititlesuffix" ) );
 305
 306                 # We're looking at an old revision
 307
 308                 if ( $oldid ) {
 309                         $this->setOldSubtitle();
 310                         $wgOut->setRobotpolicy( "noindex,follow" );
 311                 }
 312                 if ( "" != $this->mRedirectedFrom ) {
 313                         $sk = $wgUser->getSkin();
 314                         $redir = $sk->makeKnownLink( $this->mRedirectedFrom, "",
 315                           "redirect=no" );
 316                         $s = wfMsg( "redirectedfrom", $redir );
 317                         $wgOut->setSubtitle( $s );
 318                 }
 319                 $wgOut->checkLastModified( $this->mTouched );
 320                 $this->tryFileCache();
 321                 $wgLinkCache->preFill( $this->mTitle );
 322                 $wgOut->addWikiText( $text );
 323
 324                 $this->viewUpdates();
 325                 wfProfileOut( $fname );
 326         }
 327
 328         # Theoretically we could defer these whole insert and update
 329         # functions for after display, but that's taking a big leap
 330         # of faith, and we want to be able to report database
 331         # errors at some point.
 332
 333         /* private */ function insertNewArticle( $text, $summary, $isminor, $watchthis )
 334         {
 335                 global $wgOut, $wgUser, $wgLinkCache, $wgMwRedir;
 336                 global $wgEnablePersistentLC;
 337
 338                 $fname = "Article::insertNewArticle";
 339
 340                 $ns = $this->mTitle->getNamespace();
 341                 $ttl = $this->mTitle->getDBkey();
 342                 $text = $this->preSaveTransform( $text );
 343                 if ( $wgMwRedir->matchStart( $text ) ) { $redir = 1; }
 344                 else { $redir = 0; }
 345
 346                 $now = wfTimestampNow();
 347                 $won = wfInvertTimestamp( $now );
 348                 wfSeedRandom();
 349                 $rand = number_format( mt_rand() / mt_getrandmax(), 12, ".", "" );
 350                 $sql = "INSERT INTO cur (cur_namespace,cur_title,cur_text," .
 351                   "cur_comment,cur_user,cur_timestamp,cur_minor_edit,cur_counter," .
 352                   "cur_restrictions,cur_user_text,cur_is_redirect," .
 353                   "cur_is_new,cur_random,cur_touched,inverse_timestamp) VALUES ({$ns},'" . wfStrencode( $ttl ) . "', '" .
 354                   wfStrencode( $text ) . "', '" .
 355                   wfStrencode( $summary ) . "', '" .
 356                   $wgUser->getID() . "', '{$now}', " .
 357                   ( $isminor ? 1 : 0 ) . ", 0, '', '" .
 358                   wfStrencode( $wgUser->getName() ) . "', $redir, 1, $rand, '{$now}', '{$won}')";
 359                 $res = wfQuery( $sql, DB_WRITE, $fname );
 360
 361                 $newid = wfInsertId();
 362                 $this->mTitle->resetArticleID( $newid );
 363
 364                 if ( $wgEnablePersistentLC ) {
 365                         // Purge related entries in links cache on new page, to heal broken links
 366                         $ptitle = wfStrencode( $ttl );
 367                         wfQuery("DELETE linkscc FROM linkscc,brokenlinks ".
 368                                 "WHERE lcc_pageid=bl_from AND bl_to='{$ptitle}'", DB_WRITE);
 369                 }
 370
 371                 $sql = "INSERT INTO recentchanges (rc_timestamp,rc_cur_time," .
 372                   "rc_namespace,rc_title,rc_new,rc_minor,rc_cur_id,rc_user," .
 373                   "rc_user_text,rc_comment,rc_this_oldid,rc_last_oldid,rc_bot) VALUES (" .
 374                   "'{$now}','{$now}',{$ns},'" . wfStrencode( $ttl ) . "',1," .
 375                   ( $isminor ? 1 : 0 ) . ",{$newid}," . $wgUser->getID() . ",'" .
 376                   wfStrencode( $wgUser->getName() ) . "','" .
 377                   wfStrencode( $summary ) . "',0,0," .
 378                   ( $wgUser->isBot() ? 1 : 0 ) . ")";
 379                 wfQuery( $sql, DB_WRITE, $fname );
 380                 if ($watchthis) {
 381                         if(!$this->mTitle->userIsWatching()) $this->watch();
 382                 } else {
 383                         if ( $this->mTitle->userIsWatching() ) {
 384                                 $this->unwatch();
 385                         }
 386                 }
 387
 388                 # The talk page isn't in the regular link tables, so we need to update manually:
 389                 $talkns = $ns ^ 1; # talk -> normal; normal -> talk
 390                 $sql = "UPDATE cur set cur_touched='$now' WHERE cur_namespace=$talkns AND cur_title='" . wfStrencode( $ttl ) . "'";
 391                 wfQuery( $sql, DB_WRITE );
 392
 393                 $this->showArticle( $text, wfMsg( "newarticle" ) );
 394         }
 395
 396         function updateArticle( $text, $summary, $minor, $watchthis, $section = "")
 397         {
 398                 global $wgOut, $wgUser, $wgLinkCache;
 399                 global $wgDBtransactions, $wgMwRedir;
 400                 $fname = "Article::updateArticle";
 401
 402                 $this->loadLastEdit();
 403
 404                 // insert updated section into old text if we have only edited part
 405                 // of the article
 406                 if ($section != "") {
 407                         $oldtext=$this->getContent();
 408                         if($section=="new") {
 409                                 if($summary) $subject="== {$summary} ==\n\n";
 410                                 $text=$oldtext."\n\n".$subject.$text;
 411                         } else {
 412                                 $secs=preg_split("/(^=+.*?=+|^<h[1-6].*?>.*?<\/h[1-6].*?>)/mi",
 413                                   $oldtext,-1,PREG_SPLIT_DELIM_CAPTURE);
 414                                 $secs[$section*2]=$text."\n\n"; // replace with edited
 415                                 if($section) { $secs[$section*2-1]=""; } // erase old headline
 416                                 $text=join("",$secs);
 417                         }
 418                 }
 419                 if ( $this->mMinorEdit ) { $me1 = 1; } else { $me1 = 0; }
 420                 if ( $minor ) { $me2 = 1; } else { $me2 = 0; }
 421                 if ( preg_match( "/^((" . $wgMwRedir->getBaseRegex() . ")[^\\n]+)/i", $text, $m ) ) {
 422                         $redir = 1;
 423                         $text = $m[1] . "\n"; # Remove all content but redirect
 424                 }
 425                 else { $redir = 0; }
 426
 427                 $text = $this->preSaveTransform( $text );
 428
 429                 # Update article, but only if changed.
 430
 431                 if( $wgDBtransactions ) {
 432                         $sql = "BEGIN";
 433                         wfQuery( $sql, DB_WRITE );
 434                 }
 435                 $oldtext = $this->getContent( true );
 436
 437                 if ( 0 != strcmp( $text, $oldtext ) ) {
 438                         $this->mCountAdjustment = $this->isCountable( $text )
 439                           - $this->isCountable( $oldtext );
 440
 441                         $now = wfTimestampNow();
 442                         $won = wfInvertTimestamp( $now );
 443                         $sql = "UPDATE cur SET cur_text='" . wfStrencode( $text ) .
 444                           "',cur_comment='" .  wfStrencode( $summary ) .
 445                           "',cur_minor_edit={$me2}, cur_user=" . $wgUser->getID() .
 446                           ",cur_timestamp='{$now}',cur_user_text='" .
 447                           wfStrencode( $wgUser->getName() ) .
 448                           "',cur_is_redirect={$redir}, cur_is_new=0, cur_touched='{$now}', inverse_timestamp='{$won}' " .
 449                           "WHERE cur_id=" . $this->getID() .
 450                           " AND cur_timestamp='" . $this->getTimestamp() . "'";
 451                         $res = wfQuery( $sql, DB_WRITE, $fname );
 452
 453                         if( wfAffectedRows() == 0 ) {
 454                                 /* Belated edit conflict! Run away!! */
 455                                 return false;
 456                         }
 457
 458                         $sql = "INSERT INTO old (old_namespace,old_title,old_text," .
 459                           "old_comment,old_user,old_user_text,old_timestamp," .
 460                           "old_minor_edit,inverse_timestamp) VALUES (" .
 461                           $this->mTitle->getNamespace() . ", '" .
 462                           wfStrencode( $this->mTitle->getDBkey() ) . "', '" .
 463                           wfStrencode( $oldtext ) . "', '" .
 464                           wfStrencode( $this->getComment() ) . "', " .
 465                           $this->getUser() . ", '" .
 466                           wfStrencode( $this->getUserText() ) . "', '" .
 467                           $this->getTimestamp() . "', " . $me1 . ", '" .
 468                           wfInvertTimestamp( $this->getTimestamp() ) . "')";
 469                         $res = wfQuery( $sql, DB_WRITE, $fname );
 470                         $oldid = wfInsertID( $res );
 471
 472                         $sql = "INSERT INTO recentchanges (rc_timestamp,rc_cur_time," .
 473                           "rc_namespace,rc_title,rc_new,rc_minor,rc_bot,rc_cur_id,rc_user," .
 474                           "rc_user_text,rc_comment,rc_this_oldid,rc_last_oldid) VALUES (" .
 475                           "'{$now}','{$now}'," . $this->mTitle->getNamespace() . ",'" .
 476                           wfStrencode( $this->mTitle->getDBkey() ) . "',0,{$me2}," .
 477                           ( $wgUser->isBot() ? 1 : 0 ) . "," .
 478                           $this->getID() . "," . $wgUser->getID() . ",'" .
 479                           wfStrencode( $wgUser->getName() ) . "','" .
 480                           wfStrencode( $summary ) . "',0,{$oldid})";
 481                         wfQuery( $sql, DB_WRITE, $fname );
 482
 483                         $sql = "UPDATE recentchanges SET rc_this_oldid={$oldid} " .
 484                           "WHERE rc_namespace=" . $this->mTitle->getNamespace() . " AND " .
 485                           "rc_title='" . wfStrencode( $this->mTitle->getDBkey() ) . "' AND " .
 486                           "rc_timestamp='" . $this->getTimestamp() . "'";
 487                         wfQuery( $sql, DB_WRITE, $fname );
 488
 489                         $sql = "UPDATE recentchanges SET rc_cur_time='{$now}' " .
 490                           "WHERE rc_cur_id=" . $this->getID();
 491                         wfQuery( $sql, DB_WRITE, $fname );
 492
 493                         if ( $wgEnablePersistentLC ) {
 494
 495                                 // Purge link cache for this page
 496                                 $pageid=$this->getID();
 497                                 wfQuery("DELETE FROM linkscc WHERE lcc_pageid='{$pageid}'", DB_WRITE);
 498
 499                                 // This next query just makes sure stub colored links to this page
 500                                 // are updated correctly (I think). If performance is more important
 501                                 // than real-time updating of stub links, we really should skip
 502                                 // this query.
 503                                 wfQuery("DELETE linkscc FROM linkscc,links ".
 504                                         "WHERE lcc_title=links.l_from AND l_to={$pageid}", DB_WRITE);
 505                         }
 506
 507                 }
 508                 if( $wgDBtransactions ) {
 509                         $sql = "COMMIT";
 510                         wfQuery( $sql, DB_WRITE );
 511                 }
 512
 513                 if ($watchthis) {
 514                         if (!$this->mTitle->userIsWatching()) $this->watch();
 515                 } else {
 516                         if ( $this->mTitle->userIsWatching() ) {
 517                                 $this->unwatch();
 518                         }
 519                 }
 520
 521                 $this->showArticle( $text, wfMsg( "updated" ) );
 522                 return true;
 523         }
 524
 525         # After we've either updated or inserted the article, update
 526         # the link tables and redirect to the new page.
 527
 528         function showArticle( $text, $subtitle )
 529         {
 530                 global $wgOut, $wgUser, $wgLinkCache, $wgUseBetterLinksUpdate;
 531                 global $wgMwRedir;
 532
 533                 $wgLinkCache = new LinkCache();
 534
 535                 # Get old version of link table to allow incremental link updates
 536                 if ( $wgUseBetterLinksUpdate ) {
 537                         $wgLinkCache->preFill( $this->mTitle );
 538                         $wgLinkCache->clear();
 539                 }
 540
 541                 # Now update the link cache by parsing the text
 542                 $wgOut = new OutputPage();
 543                 $wgOut->addWikiText( $text );
 544
 545                 $this->editUpdates( $text );
 546                 if( $wgMwRedir->matchStart( $text ) )
 547                         $r = "redirect=no";
 548                 else
 549                         $r = "";
 550                 $wgOut->redirect( wfLocalUrl( $this->mTitle->getPrefixedURL(), $r ) );
 551         }
 552
 553         # Add this page to my watchlist
 554
 555         function watch( $add = true )
 556         {
 557                 global $wgUser, $wgOut, $wgLang;
 558                 global $wgDeferredUpdateList;
 559
 560                 if ( 0 == $wgUser->getID() ) {
 561                         $wgOut->errorpage( "watchnologin", "watchnologintext" );
 562                         return;
 563                 }
 564                 if ( wfReadOnly() ) {
 565                         $wgOut->readOnlyPage();
 566                         return;
 567                 }
 568                 if( $add )
 569                         $wgUser->addWatch( $this->mTitle );
 570                 else
 571                         $wgUser->removeWatch( $this->mTitle );
 572
 573                 $wgOut->setPagetitle( wfMsg( $add ? "addedwatch" : "removedwatch" ) );
 574                 $wgOut->setRobotpolicy( "noindex,follow" );
 575
 576                 $sk = $wgUser->getSkin() ;
 577                 $link = $sk->makeKnownLink ( $this->mTitle->getPrefixedText() ) ;
 578
 579                 if($add)
 580                         $text = wfMsg( "addedwatchtext", $link );
 581                 else
 582                         $text = wfMsg( "removedwatchtext", $link );
 583                 $wgOut->addHTML( $text );
 584
 585                 $up = new UserUpdate();
 586                 array_push( $wgDeferredUpdateList, $up );
 587
 588                 $wgOut->returnToMain( false );
 589         }
 590
 591         function unwatch()
 592         {
 593                 $this->watch( false );
 594         }
 595
 596         # This shares a lot of issues (and code) with Recent Changes
 597
 598         function history()
 599         {
 600                 global $wgUser, $wgOut, $wgLang, $offset, $limit;
 601
 602                 # If page hasn't changed, client can cache this
 603
 604                 $wgOut->checkLastModified( $this->getTimestamp() );
 605                 $fname = "Article::history";
 606                 wfProfileIn( $fname );
 607
 608                 $wgOut->setPageTitle( $this->mTitle->getPRefixedText() );
 609                 $wgOut->setSubtitle( wfMsg( "revhistory" ) );
 610                 $wgOut->setArticleFlag( false );
 611                 $wgOut->setRobotpolicy( "noindex,nofollow" );
 612
 613                 if( $this->mTitle->getArticleID() == 0 ) {
 614                         $wgOut->addHTML( wfMsg( "nohistory" ) );
 615                         wfProfileOut( $fname );
 616                         return;
 617                 }
 618
 619                 $offset = (int)$offset;
 620                 $limit = (int)$limit;
 621                 if( $limit == 0 ) $limit = 50;
 622                 $namespace = $this->mTitle->getNamespace();
 623                 $title = $this->mTitle->getText();
 624                 $sql = "SELECT old_id,old_user," .
 625                   "old_comment,old_user_text,old_timestamp,old_minor_edit ".
 626                   "FROM old USE INDEX (name_title_timestamp) " .
 627                   "WHERE old_namespace={$namespace} AND " .
 628                   "old_title='" . wfStrencode( $this->mTitle->getDBkey() ) . "' " .
 629                   "ORDER BY inverse_timestamp LIMIT $offset, $limit";
 630                 $res = wfQuery( $sql, DB_READ, "Article::history" );
 631
 632                 $revs = wfNumRows( $res );
 633                 if( $this->mTitle->getArticleID() == 0 ) {
 634                         $wgOut->addHTML( wfMsg( "nohistory" ) );
 635                         wfProfileOut( $fname );
 636                         return;
 637                 }
 638
 639                 $sk = $wgUser->getSkin();
 640                 $numbar = wfViewPrevNext(
 641                         $offset, $limit,
 642                         $this->mTitle->getPrefixedText(),
 643                         "action=history" );
 644                 $s = $numbar;
 645                 $s .= $sk->beginHistoryList();
 646
 647                 if($offset == 0 )
 648                 $s .= $sk->historyLine( $this->getTimestamp(), $this->getUser(),
 649                   $this->getUserText(), $namespace,
 650                   $title, 0, $this->getComment(),
 651                   ( $this->getMinorEdit() > 0 ) );
 652
 653                 $revs = wfNumRows( $res );
 654                 while ( $line = wfFetchObject( $res ) ) {
 655                         $s .= $sk->historyLine( $line->old_timestamp, $line->old_user,
 656                           $line->old_user_text, $namespace,
 657                           $title, $line->old_id,
 658                           $line->old_comment, ( $line->old_minor_edit > 0 ) );
 659                 }
 660                 $s .= $sk->endHistoryList();
 661                 $s .= $numbar;
 662                 $wgOut->addHTML( $s );
 663                 wfProfileOut( $fname );
 664         }
 665
 666         function protect( $limit = "sysop" )
 667         {
 668                 global $wgUser, $wgOut;
 669
 670                 if ( ! $wgUser->isSysop() ) {
 671                         $wgOut->sysopRequired();
 672                         return;
 673                 }
 674                 if ( wfReadOnly() ) {
 675                         $wgOut->readOnlyPage();
 676                         return;
 677                 }
 678                 $id = $this->mTitle->getArticleID();
 679                 if ( 0 == $id ) {
 680                         $wgOut->fatalEror( wfMsg( "badarticleerror" ) );
 681                         return;
 682                 }
 683         $sql = "UPDATE cur SET cur_touched='" . wfTimestampNow() . "'," .
 684                         "cur_restrictions='{$limit}' WHERE cur_id={$id}";
 685                 wfQuery( $sql, DB_WRITE, "Article::protect" );
 686
 687                 $log = new LogPage( wfMsg( "protectlogpage" ), wfMsg( "protectlogtext" ) );
 688                 if ( $limit === "" ) {
 689                         $log->addEntry( wfMsg( "unprotectedarticle", $this->mTitle->getPrefixedText() ), "" );
 690                 } else {
 691                         $log->addEntry( wfMsg( "protectedarticle", $this->mTitle->getPrefixedText() ), "" );
 692                 }
 693                 $wgOut->redirect( wfLocalUrl( $this->mTitle->getPrefixedURL() ) );
 694         }
 695
 696         function unprotect()
 697         {
 698                 return $this->protect( "" );
 699         }
 700
 701         function delete()
 702         {
 703                 global $wgUser, $wgOut;
 704                 global $wpConfirm, $wpReason, $image, $oldimage;
 705                 $wpReason  = $_REQUEST["wpReason"];
 706                 $wpConfirm = $_REQUEST["wpConfirm"];
 707
 708                 # This code desperately needs to be totally rewritten
 709
 710                 if ( ( ! $wgUser->isSysop() ) ) {
 711                         $wgOut->sysopRequired();
 712                         return;
 713                 }
 714                 if ( wfReadOnly() ) {
 715                         $wgOut->readOnlyPage();
 716                         return;
 717                 }
 718
 719                 # Better double-check that it hasn't been deleted yet!
 720                 $wgOut->setPagetitle( wfMsg( "confirmdelete" ) );
 721                 if ( ( "" == trim( $this->mTitle->getText() ) )
 722                   or ( $this->mTitle->getArticleId() == 0 ) ) {
 723                         $wgOut->fatalError( wfMsg( "cannotdelete" ) );
 724                         return;
 725                 }
 726
 727                 if ( $wpConfirm ) {
 728                         $this->doDelete();
 729                         return;
 730                 }
 731
 732                 # determine whether this page has earlier revisions
 733                 # and insert a warning if it does
 734                 # we select the text because it might be useful below
 735                 $sql="SELECT old_text FROM old WHERE old_namespace=0 and old_title='" . wfStrencode($this->mTitle->getPrefixedDBkey())."' ORDER BY inverse_timestamp LIMIT 1";
 736                 $res=wfQuery($sql, DB_READ, $fname);
 737                 if( ($old=wfFetchObject($res)) && !$wpConfirm ) {
 738                         $skin=$wgUser->getSkin();
 739                         $wgOut->addHTML("<B>".wfMsg("historywarning"));
 740                         $wgOut->addHTML( $skin->historyLink() ."</B><P>");
 741                 }
 742
 743                 $sql="SELECT cur_text FROM cur WHERE cur_namespace=0 and cur_title='" . wfStrencode($this->mTitle->getPrefixedDBkey())."'";
 744                 $res=wfQuery($sql, DB_READ, $fname);
 745                 if( ($s=wfFetchObject($res))) {
 746
 747                         # if this is a mini-text, we can paste part of it into the deletion reason
 748
 749                         #if this is empty, an earlier revision may contain "useful" text
 750                         if($s->cur_text!="") {
 751                                 $text=$s->cur_text;
 752                         } else {
 753                                 if($old) {
 754                                         $text=$old->old_text;
 755                                         $blanked=1;
 756                                 }
 757
 758                         }
 759
 760                         $length=strlen($text);
 761
 762                         # this should not happen, since it is not possible to store an empty, new
 763                         # page. Let's insert a standard text in case it does, though
 764                         if($length==0 && !$wpReason) { $wpReason=wfmsg("exblank");}
 765
 766
 767                         if($length < 500 && !$wpReason) {
 768
 769                                 # comment field=255, let's grep the first 150 to have some user
 770                                 # space left
 771                                 $text=substr($text,0,150);
 772                                 # let's strip out newlines and HTML tags
 773                                 $text=preg_replace("/\"/","'",$text);
 774                                 $text=preg_replace("/\</","&lt;",$text);
 775                                 $text=preg_replace("/\>/","&gt;",$text);
 776                                 $text=preg_replace("/[\n\r]/","",$text);
 777                                 if(!$blanked) {
 778                                         $wpReason=wfMsg("excontent"). " '".$text;
 779                                 } else {
 780                                         $wpReason=wfMsg("exbeforeblank") . " '".$text;
 781                                 }
 782                                 if($length>150) { $wpReason .= "..."; } # we've only pasted part of the text
 783                                 $wpReason.="'";
 784                         }
 785                 }
 786
 787                 return $this->confirmDelete();
 788         }
 789
 790         function confirmDelete( $par = "" )
 791         {
 792                 global $wgOut;
 793
 794                 wfDebug( "Article::confirmDelete\n" );
 795
 796                 $sub = htmlspecialchars( $this->mTitle->getPrefixedText() );
 797                 $wgOut->setSubtitle( wfMsg( "deletesub", $sub ) );
 798                 $wgOut->setRobotpolicy( "noindex,nofollow" );
 799                 $wgOut->addWikiText( wfMsg( "confirmdeletetext" ) );
 800
 801                 $t = $this->mTitle->getPrefixedURL();
 802
 803                 $formaction = wfEscapeHTML( wfLocalUrl( $t, "action=delete" . $par ) );
 804                 $confirm = wfMsg( "confirm" );
 805                 $check = wfMsg( "confirmcheck" );
 806                 $delcom = wfMsg( "deletecomment" );
 807
 808                 $wgOut->addHTML( "
 809 <form id=\"deleteconfirm\" method=\"post\" action=\"{$formaction}\">
 810 <table border=0><tr><td align=right>
 811 {$delcom}:</td><td align=left>
 812 <input type=text size=60 name=\"wpReason\" value=\"{$wpReason}\">
 813 </td></tr><tr><td>&nbsp;</td></tr>
 814 <tr><td align=right>
 815 <input type=checkbox name=\"wpConfirm\" value='1' id=\"wpConfirm\">
 816 </td><td><label for=\"wpConfirm\">{$check}</label></td>
 817 </tr><tr><td>&nbsp;</td><td>
 818 <input type=submit name=\"wpConfirmB\" value=\"{$confirm}\">
 819 </td></tr></table></form>\n" );
 820
 821                 $wgOut->returnToMain( false );
 822         }
 823
 824         function doDelete()
 825         {
 826                 global $wgOut, $wgUser, $wgLang;
 827                 global $wpReason;
 828                 $fname = "Article::doDelete";
 829                 wfDebug( "$fname\n" );
 830
 831                 $this->doDeleteArticle( $this->mTitle );
 832                 $deleted = $this->mTitle->getPrefixedText();
 833
 834                 $wgOut->setPagetitle( wfMsg( "actioncomplete" ) );
 835                 $wgOut->setRobotpolicy( "noindex,nofollow" );
 836
 837                 $sk = $wgUser->getSkin();
 838                 $loglink = $sk->makeKnownLink( $wgLang->getNsText(
 839                   Namespace::getWikipedia() ) .
 840                   ":" . wfMsg( "dellogpage" ), wfMsg( "deletionlog" ) );
 841
 842                 $text = wfMsg( "deletedtext", $deleted, $loglink );
 843
 844                 $wgOut->addHTML( "<p>" . $text );
 845                 $wgOut->returnToMain( false );
 846         }
 847
 848         function doDeleteArticle( $title )
 849         {
 850                 global $wgUser, $wgOut, $wgLang, $wpReason, $wgDeferredUpdateList;
 851
 852                 $fname = "Article::doDeleteArticle";
 853                 wfDebug( "$fname\n" );
 854
 855                 $ns = $title->getNamespace();
 856                 $t = wfStrencode( $title->getDBkey() );
 857                 $id = $title->getArticleID();
 858
 859                 if ( "" == $t ) {
 860                         $wgOut->fatalError( wfMsg( "cannotdelete" ) );
 861                         return;
 862                 }
 863
 864                 $u = new SiteStatsUpdate( 0, 1, -$this->isCountable( $this->getContent( true ) ) );
 865                 array_push( $wgDeferredUpdateList, $u );
 866
 867                 # Move article and history to the "archive" table
 868                 $sql = "INSERT INTO archive (ar_namespace,ar_title,ar_text," .
 869                   "ar_comment,ar_user,ar_user_text,ar_timestamp,ar_minor_edit," .
 870                   "ar_flags) SELECT cur_namespace,cur_title,cur_text,cur_comment," .
 871                   "cur_user,cur_user_text,cur_timestamp,cur_minor_edit,0 FROM cur " .
 872                   "WHERE cur_namespace={$ns} AND cur_title='{$t}'";
 873                 wfQuery( $sql, DB_WRITE, $fname );
 874
 875                 $sql = "INSERT INTO archive (ar_namespace,ar_title,ar_text," .
 876                   "ar_comment,ar_user,ar_user_text,ar_timestamp,ar_minor_edit," .
 877                   "ar_flags) SELECT old_namespace,old_title,old_text,old_comment," .
 878                   "old_user,old_user_text,old_timestamp,old_minor_edit,old_flags " .
 879                   "FROM old WHERE old_namespace={$ns} AND old_title='{$t}'";
 880                 wfQuery( $sql, DB_WRITE, $fname );
 881
 882                 # Now that it's safely backed up, delete it
 883
 884                 $sql = "DELETE FROM cur WHERE cur_namespace={$ns} AND " .
 885                   "cur_title='{$t}'";
 886                 wfQuery( $sql, DB_WRITE, $fname );
 887
 888                 $sql = "DELETE FROM old WHERE old_namespace={$ns} AND " .
 889                   "old_title='{$t}'";
 890                 wfQuery( $sql, DB_WRITE, $fname );
 891
 892                 $sql = "DELETE FROM recentchanges WHERE rc_namespace={$ns} AND " .
 893                   "rc_title='{$t}'";
 894                 wfQuery( $sql, DB_WRITE, $fname );
 895
 896                 # Finally, clean up the link tables
 897
 898                 if ( 0 != $id ) {
 899
 900                         $t = wfStrencode( $title->getPrefixedDBkey() );
 901
 902                         if ( $wgEnablePersistentLC ) {
 903                                 // Purge related entries in links cache on delete,
 904                                 wfQuery("DELETE linkscc FROM linkscc,links ".
 905                                         "WHERE lcc_title=links.l_from AND l_to={$id}", DB_WRITE);
 906                                 wfQuery("DELETE FROM linkscc WHERE lcc_title='{$t}'", DB_WRITE);
 907                         }
 908
 909                         $sql = "SELECT l_from FROM links WHERE l_to={$id}";
 910                         $res = wfQuery( $sql, DB_READ, $fname );
 911
 912                         $sql = "INSERT INTO brokenlinks (bl_from,bl_to) VALUES ";
 913                         $now = wfTimestampNow();
 914                         $sql2 = "UPDATE cur SET cur_touched='{$now}' WHERE cur_id IN (";
 915                         $first = true;
 916
 917                         while ( $s = wfFetchObject( $res ) ) {
 918                                 $nt = Title::newFromDBkey( $s->l_from );
 919                                 $lid = $nt->getArticleID();
 920
 921                                 if ( ! $first ) { $sql .= ","; $sql2 .= ","; }
 922                                 $first = false;
 923                                 $sql .= "({$lid},'{$t}')";
 924                                 $sql2 .= "{$lid}";
 925                         }
 926                         $sql2 .= ")";
 927                         if ( ! $first ) {
 928                                 wfQuery( $sql, DB_WRITE, $fname );
 929                                 wfQuery( $sql2, DB_WRITE, $fname );
 930                         }
 931                         wfFreeResult( $res );
 932
 933                         $sql = "DELETE FROM links WHERE l_to={$id}";
 934                         wfQuery( $sql, DB_WRITE, $fname );
 935
 936                         $sql = "DELETE FROM links WHERE l_from='{$t}'";
 937                         wfQuery( $sql, DB_WRITE, $fname );
 938
 939                         $sql = "DELETE FROM imagelinks WHERE il_from='{$t}'";
 940                         wfQuery( $sql, DB_WRITE, $fname );
 941
 942                         $sql = "DELETE FROM brokenlinks WHERE bl_from={$id}";
 943                         wfQuery( $sql, DB_WRITE, $fname );
 944                 }
 945
 946                 $log = new LogPage( wfMsg( "dellogpage" ), wfMsg( "dellogpagetext" ) );
 947                 $art = $title->getPrefixedText();
 948                 $wpReason = wfCleanQueryVar( $wpReason );
 949                 $log->addEntry( wfMsg( "deletedarticle", $art ), $wpReason );
 950
 951                 # Clear the cached article id so the interface doesn't act like we exist
 952                 $this->mTitle->resetArticleID( 0 );
 953                 $this->mTitle->mArticleID = 0;
 954         }
 955
 956         function rollback()
 957         {
 958                 global $wgUser, $wgLang, $wgOut, $from;
 959                 $from = $_REQUEST["from"];
 960
 961                 if ( ! $wgUser->isSysop() ) {
 962                         $wgOut->sysopRequired();
 963                         return;
 964                 }
 965
 966                 # Replace all this user's current edits with the next one down
 967                 $tt = wfStrencode( $this->mTitle->getDBKey() );
 968                 $n = $this->mTitle->getNamespace();
 969
 970                 # Get the last editor
 971                 $sql = "SELECT cur_id,cur_user,cur_user_text,cur_comment FROM cur WHERE cur_title='{$tt}' AND cur_namespace={$n}";
 972                 $res = wfQuery( $sql, DB_READ );
 973                 if( ($x = wfNumRows( $res )) != 1 ) {
 974                         # Something wrong
 975                         $wgOut->addHTML( wfMsg( "notanarticle" ) );
 976                         return;
 977                 }
 978                 $s = wfFetchObject( $res );
 979                 $ut = wfStrencode( $s->cur_user_text );
 980                 $uid = $s->cur_user;
 981                 $pid = $s->cur_id;
 982
 983                 $from = str_replace( '_', ' ', wfCleanQueryVar( $from ) );
 984                 if( $from != $s->cur_user_text ) {
 985                         $wgOut->setPageTitle(wfmsg("rollbackfailed"));
 986                         $wgOut->addWikiText( wfMsg( "alreadyrolled",
 987                                 htmlspecialchars( $this->mTitle->getPrefixedText()),
 988                                 htmlspecialchars( $from ),
 989                                 htmlspecialchars( $s->cur_user_text ) ) );
 990                         if($s->cur_comment != "") {
 991                                 $wgOut->addHTML(
 992                                         wfMsg("editcomment",
 993                                         htmlspecialchars( $s->cur_comment ) ) );
 994                                 }
 995                         return;
 996                 }
 997
 998                 # Get the last edit not by this guy
 999                 $sql = "SELECT old_text,old_user,old_user_text
1000                 FROM old USE INDEX (name_title_timestamp)
1001                 WHERE old_namespace={$n} AND old_title='{$tt}'
1002                 AND (old_user <> {$uid} OR old_user_text <> '{$ut}')
1003                 ORDER BY inverse_timestamp LIMIT 1";
1004                 $res = wfQuery( $sql, DB_READ );
1005                 if( wfNumRows( $res ) != 1 ) {
1006                         # Something wrong
1007                         $wgOut->setPageTitle(wfMsg("rollbackfailed"));
1008                         $wgOut->addHTML( wfMsg( "cantrollback" ) );
1009                         return;
1010                 }
1011                 $s = wfFetchObject( $res );
1012
1013                 # Save it!
1014                 $newcomment = wfMsg( "revertpage", $s->old_user_text );
1015                 $wgOut->setPagetitle( wfMsg( "actioncomplete" ) );
1016                 $wgOut->setRobotpolicy( "noindex,nofollow" );
1017                 $wgOut->addHTML( "<h2>" . $newcomment . "</h2>\n<hr>\n" );
1018                 $this->updateArticle( $s->old_text, $newcomment, 1, $this->mTitle->userIsWatching() );
1019
1020                 $wgOut->returnToMain( false );
1021         }
1022
1023
1024         # Do standard deferred updates after page view
1025
1026         /* private */ function viewUpdates()
1027         {
1028                 global $wgDeferredUpdateList;
1029
1030                 if ( 0 != $this->getID() ) {
1031                         global $wgDisableCounters;
1032                         if( !$wgDisableCounters ) {
1033                                 $u = new ViewCountUpdate( $this->getID() );
1034                                 array_push( $wgDeferredUpdateList, $u );
1035                                 $u = new SiteStatsUpdate( 1, 0, 0 );
1036                                 array_push( $wgDeferredUpdateList, $u );
1037                         }
1038                         $u = new UserTalkUpdate( 0, $this->mTitle->getNamespace(),
1039                           $this->mTitle->getDBkey() );
1040                         array_push( $wgDeferredUpdateList, $u );
1041                 }
1042         }
1043
1044         # Do standard deferred updates after page edit.
1045         # Every 1000th edit, prune the recent changes table.
1046
1047         /* private */ function editUpdates( $text )
1048         {
1049                 global $wgDeferredUpdateList, $wgDBname, $wgMemc;
1050
1051                 wfSeedRandom();
1052                 if ( 0 == mt_rand( 0, 999 ) ) {
1053                         $cutoff = wfUnix2Timestamp( time() - ( 7 * 86400 ) );
1054                         $sql = "DELETE FROM recentchanges WHERE rc_timestamp < '{$cutoff}'";
1055                         wfQuery( $sql, DB_WRITE );
1056                 }
1057                 $id = $this->getID();
1058                 $title = $this->mTitle->getPrefixedDBkey();
1059                 $adj = $this->mCountAdjustment;
1060
1061                 if ( 0 != $id ) {
1062                         $u = new LinksUpdate( $id, $title );
1063                         array_push( $wgDeferredUpdateList, $u );
1064                         $u = new SiteStatsUpdate( 0, 1, $adj );
1065                         array_push( $wgDeferredUpdateList, $u );
1066                         $u = new SearchUpdate( $id, $title, $text );
1067                         array_push( $wgDeferredUpdateList, $u );
1068
1069                         $u = new UserTalkUpdate( 1, $this->mTitle->getNamespace(),
1070                           $this->mTitle->getDBkey() );
1071                         array_push( $wgDeferredUpdateList, $u );
1072
1073                         if ( $this->getNamespace == NS_MEDIAWIKI ) {
1074                                 $messageCache = $wgMemc->get( "$wgDBname:messages" );
1075                                 if (!$messageCache) {
1076                                         $messageCache = wfLoadAllMessages();
1077                                 }
1078                                 $messageCache[$title] = $text;
1079                                 $wgMemc->set( "$wgDBname:messages" );
1080                         }
1081                 }
1082         }
1083
1084         /* private */ function setOldSubtitle()
1085         {
1086                 global $wgLang, $wgOut;
1087
1088                 $td = $wgLang->timeanddate( $this->mTimestamp, true );
1089                 $r = wfMsg( "revisionasof", $td );
1090                 $wgOut->setSubtitle( "({$r})" );
1091         }
1092
1093         # This function is called right before saving the wikitext,
1094         # so we can do things like signatures and links-in-context.
1095
1096         function preSaveTransform( $text )
1097         {
1098                 $s = "";
1099                 while ( "" != $text ) {
1100                         $p = preg_split( "/<\\s*nowiki\\s*>/i", $text, 2 );
1101                         $s .= $this->pstPass2( $p[0] );
1102
1103                         if ( ( count( $p ) < 2 ) || ( "" == $p[1] ) ) { $text = ""; }
1104                         else {
1105                                 $q = preg_split( "/<\\/\\s*nowiki\\s*>/i", $p[1], 2 );
1106                                 $s .= "<nowiki>{$q[0]}</nowiki>";
1107                                 $text = $q[1];
1108                         }
1109                 }
1110                 return rtrim( $s );
1111         }
1112
1113         /* private */ function pstPass2( $text )
1114         {
1115                 global $wgUser, $wgLang, $wgLocaltimezone;
1116
1117                 # Signatures
1118                 #
1119                 $n = $wgUser->getName();
1120                 $k = $wgUser->getOption( "nickname" );
1121                 if ( "" == $k ) { $k = $n; }
1122                 if(isset($wgLocaltimezone)) {
1123                         $oldtz = getenv("TZ"); putenv("TZ=$wgLocaltimezone");
1124                 }
1125                 /* Note: this is an ugly timezone hack for the European wikis */
1126                 $d = $wgLang->timeanddate( date( "YmdHis" ), false ) .
1127                   " (" . date( "T" ) . ")";
1128                 if(isset($wgLocaltimezone)) putenv("TZ=$oldtz");
1129
1130                 $text = preg_replace( "/~~~~/", "[[" . $wgLang->getNsText(
1131                   Namespace::getUser() ) . ":$n|$k]] $d", $text );
1132                 $text = preg_replace( "/~~~/", "[[" . $wgLang->getNsText(
1133                   Namespace::getUser() ) . ":$n|$k]]", $text );
1134
1135                 # Context links: [[|name]] and [[name (context)|]]
1136                 #
1137                 $tc = "[&;%\\-,.\\(\\)' _0-9A-Za-z\\/:\\x80-\\xff]";
1138                 $np = "[&;%\\-,.' _0-9A-Za-z\\/:\\x80-\\xff]"; # No parens
1139                 $namespacechar = '[ _0-9A-Za-z\x80-\xff]'; # Namespaces can use non-ascii!
1140                 $conpat = "/^({$np}+) \\(({$tc}+)\\)$/";
1141
1142                 $p1 = "/\[\[({$np}+) \\(({$np}+)\\)\\|]]/";             # [[page (context)|]]
1143                 $p2 = "/\[\[\\|({$tc}+)]]/";                                    # [[|page]]
1144                 $p3 = "/\[\[($namespacechar+):({$np}+)\\|]]/";          # [[namespace:page|]]
1145                 $p4 = "/\[\[($namespacechar+):({$np}+) \\(({$np}+)\\)\\|]]/";
1146                                                                                                                 # [[ns:page (cont)|]]
1147                 $context = "";
1148                 $t = $this->mTitle->getText();
1149                 if ( preg_match( $conpat, $t, $m ) ) {
1150                         $context = $m[2];
1151                 }
1152                 $text = preg_replace( $p4, "[[\\1:\\2 (\\3)|\\2]]", $text );
1153                 $text = preg_replace( $p1, "[[\\1 (\\2)|\\1]]", $text );
1154                 $text = preg_replace( $p3, "[[\\1:\\2|\\2]]", $text );
1155
1156                 if ( "" == $context ) {
1157                         $text = preg_replace( $p2, "[[\\1]]", $text );
1158                 } else {
1159                         $text = preg_replace( $p2, "[[\\1 ({$context})|\\1]]", $text );
1160                 }
1161
1162                 # {{SUBST:xxx}} variables
1163                 #
1164                 $mw =& MagicWord::get( MAG_SUBST );
1165                 $text = $mw->substituteCallback( $text, "wfReplaceSubstVar" );
1166
1167                 return $text;
1168         }
1169
1170         /* Caching functions */
1171
1172         function tryFileCache() {
1173                 if($this->isFileCacheable()) {
1174                         $touched = $this->mTouched;
1175                         if( strpos( $this->mContent, "{{" ) !== false ) {
1176                                 # Expire pages with variable replacements in an hour
1177                                 $expire = wfUnix2Timestamp( time() - 3600 );
1178                                 $touched = max( $expire, $touched );
1179                         }
1180                         $cache = new CacheManager( $this->mTitle );
1181                         if($cache->isFileCacheGood( $touched )) {
1182                                 global $wgOut;
1183                                 wfDebug( " tryFileCache() - about to load\n" );
1184                                 $cache->loadFromFileCache();
1185                                 $wgOut->reportTime(); # For profiling
1186                                 exit;
1187                         } else {
1188                                 wfDebug( " tryFileCache() - starting buffer\n" );
1189                                 if($cache->useGzip() && wfClientAcceptsGzip()) {
1190                                         /* For some reason, adding this header line over in
1191                                            CacheManager::saveToFileCache() fails on my test
1192                                            setup at home, though it works on the live install.
1193                                            Make double-sure...  --brion */
1194                                         header( "Content-Encoding: gzip" );
1195                                 }
1196                                 ob_start( array(&$cache, 'saveToFileCache' ) );
1197                         }
1198                 } else {
1199                         wfDebug( " tryFileCache() - not cacheable\n" );
1200                 }
1201         }
1202
1203         function isFileCacheable() {
1204                 global $wgUser, $wgUseFileCache, $wgShowIPinHeader;
1205                 global $action, $oldid, $diff, $redirect, $printable;
1206                 return $wgUseFileCache
1207                         and (!$wgShowIPinHeader)
1208                         and ($this->getID() != 0)
1209                         and ($wgUser->getId() == 0)
1210                         and (!$wgUser->getNewtalk())
1211                         and ($this->mTitle->getNamespace != Namespace::getSpecial())
1212                         and ($action == "view")
1213                         and (!isset($oldid))
1214                         and (!isset($diff))
1215                         and (!isset($redirect))
1216                         and (!isset($printable))
1217                         and (!$this->mRedirectedFrom);
1218         }
1219
1220         function checkTouched() {
1221                 $id = $this->getID();
1222                 $sql = "SELECT cur_touched,cur_is_redirect FROM cur WHERE cur_id=$id";
1223                 $res = wfQuery( $sql, DB_READ, "Article::checkTouched" );
1224                 if( $s = wfFetchObject( $res ) ) {
1225                         $this->mTouched = $s->cur_touched;
1226                         return !$s->cur_is_redirect;
1227                 } else {
1228                         return false;
1229                 }
1230         }
1231 }
1232
1233 function wfReplaceSubstVar( $matches ) {
1234         return wfMsg( $matches[1] );
1235 }
1236
1237 ?>