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                 $fname =  "Article::getContent";
  46                 wfProfileIn( $fname );
  47
  48                 if ( 0 == $this->getID() ) {
  49                         if ( "edit" == $action ) {
  50                                 wfProfileOut( $fname );
  51                                 return ""; # was "newarticletext", now moved above the box)
  52                         }
  53                         wfProfileOut( $fname );
  54                         return wfMsg( "noarticletext" );
  55                 } else {
  56                         $this->loadContent( $noredir );
  57
  58                         if(
  59                                 # check if we're displaying a [[User talk:x.x.x.x]] anonymous talk page
  60                                 ( $this->mTitle->getNamespace() == Namespace::getTalk( Namespace::getUser()) ) &&
  61                                   preg_match("/^\d{1,3}\.\d{1,3}.\d{1,3}\.\d{1,3}$/",$this->mTitle->getText()) &&
  62                                   $action=="view"
  63                                 )
  64                                 {
  65                                 wfProfileOut( $fname );
  66                                 return $this->mContent . "\n" .wfMsg("anontalkpagetext"); }
  67                         else {
  68                                 if($action=="edit") {
  69                                         if($section!="") {
  70                                                 if($section=="new") {
  71                                                         wfProfileOut( $fname );
  72                                                         return "";
  73                                                 }
  74
  75                                                 $secs=preg_split("/(^=+.*?=+|^<h[1-6].*?>.*?<\/h[1-6].*?>)/mi",
  76                                                  $this->mContent, -1,
  77                                                  PREG_SPLIT_DELIM_CAPTURE);
  78                                                 if($section==0) {
  79                                                         wfProfileOut( $fname );
  80                                                         return trim($secs[0]);
  81                                                 } else {
  82                                                         wfProfileOut( $fname );
  83                                                         return trim($secs[$section*2-1] . $secs[$section*2]);
  84                                                 }
  85                                         }
  86                                 }
  87                                 wfProfileOut( $fname );
  88                                 return $this->mContent;
  89                         }
  90                 }
  91         }
  92
  93         function loadContent( $noredir = false )
  94         {
  95                 global $wgOut, $wgMwRedir;
  96                 global $oldid, $redirect; # From query
  97
  98                 if ( $this->mContentLoaded ) return;
  99                 $fname = "Article::loadContent";
 100
 101                 # Pre-fill content with error message so that if something
 102                 # fails we'll have something telling us what we intended.
 103
 104                 $t = $this->mTitle->getPrefixedText();
 105                 if ( isset( $oldid ) ) {
 106                         $oldid = IntVal( $oldid );
 107                         $t .= ",oldid={$oldid}";
 108                 }
 109                 if ( isset( $redirect ) ) {
 110                         $redirect = ($redirect == "no") ? "no" : "yes";
 111                         $t .= ",redirect={$redirect}";
 112                 }
 113                 $this->mContent = wfMsg( "missingarticle", $t );
 114
 115                 if ( ! $oldid ) {       # Retrieve current version
 116                         $id = $this->getID();
 117                         if ( 0 == $id ) return;
 118
 119                         $sql = "SELECT " .
 120                           "cur_text,cur_timestamp,cur_user,cur_counter,cur_restrictions,cur_touched " .
 121                           "FROM cur WHERE cur_id={$id}";
 122                         wfDebug( "$sql\n" );
 123                         $res = wfQuery( $sql, DB_READ, $fname );
 124                         if ( 0 == wfNumRows( $res ) ) {
 125                                 return;
 126                         }
 127
 128                         $s = wfFetchObject( $res );
 129                         # If we got a redirect, follow it (unless we've been told
 130                         # not to by either the function parameter or the query
 131                         if ( ( "no" != $redirect ) && ( false == $noredir ) &&
 132                           ( $wgMwRedir->matchStart( $s->cur_text ) ) ) {
 133                                 if ( preg_match( "/\\[\\[([^\\]\\|]+)[\\]\\|]/",
 134                                   $s->cur_text, $m ) ) {
 135                                         $rt = Title::newFromText( $m[1] );
 136
 137                                         # Gotta hand redirects to special pages differently:
 138                                         # Fill the HTTP response "Location" header and ignore
 139                                         # the rest of the page we're on.
 140
 141                                         if ( $rt->getInterwiki() != "" ) {
 142                                                 $wgOut->redirect( $rt->getFullURL() ) ;
 143                                                 return;
 144                                         }
 145                                         if ( $rt->getNamespace() == Namespace::getSpecial() ) {
 146                                                 $wgOut->redirect( wfLocalUrl(
 147                                                   $rt->getPrefixedURL() ) );
 148                                                 return;
 149                                         }
 150                                         $rid = $rt->getArticleID();
 151                                         if ( 0 != $rid ) {
 152                                                 $sql = "SELECT cur_text,cur_timestamp,cur_user," .
 153                                                   "cur_counter,cur_restrictions,cur_touched FROM cur WHERE cur_id={$rid}";
 154                                                 $res = wfQuery( $sql, DB_READ, $fname );
 155
 156                                                 if ( 0 != wfNumRows( $res ) ) {
 157                                                         $this->mRedirectedFrom = $this->mTitle->getPrefixedText();
 158                                                         $this->mTitle = $rt;
 159                                                         $s = wfFetchObject( $res );
 160                                                 }
 161                                         }
 162                                 }
 163                         }
 164
 165                         $this->mContent = $s->cur_text;
 166                         $this->mUser = $s->cur_user;
 167                         $this->mCounter = $s->cur_counter;
 168                         $this->mTimestamp = $s->cur_timestamp;
 169                         $this->mTouched = $s->cur_touched;
 170                         $this->mTitle->mRestrictions = explode( ",", trim( $s->cur_restrictions ) );
 171                         $this->mTitle->mRestrictionsLoaded = true;
 172                         wfFreeResult( $res );
 173                 } else { # oldid set, retrieve historical version
 174                         $sql = "SELECT old_text,old_timestamp,old_user FROM old " .
 175                           "WHERE old_id={$oldid}";
 176                         $res = wfQuery( $sql, DB_READ, $fname );
 177                         if ( 0 == wfNumRows( $res ) ) { return; }
 178
 179                         $s = wfFetchObject( $res );
 180                         $this->mContent = $s->old_text;
 181                         $this->mUser = $s->old_user;
 182                         $this->mCounter = 0;
 183                         $this->mTimestamp = $s->old_timestamp;
 184                         wfFreeResult( $res );
 185                 }
 186                 $this->mContentLoaded = true;
 187         }
 188
 189         function getID() {
 190                 if( $this->mTitle ) {
 191                         return $this->mTitle->getArticleID();
 192                 } else {
 193                         return 0;
 194                 }
 195         }
 196
 197         function getCount()
 198         {
 199                 if ( -1 == $this->mCounter ) {
 200                         $id = $this->getID();
 201                         $this->mCounter = wfGetSQL( "cur", "cur_counter", "cur_id={$id}" );
 202                 }
 203                 return $this->mCounter;
 204         }
 205
 206         # Would the given text make this article a "good" article (i.e.,
 207         # suitable for including in the article count)?
 208
 209         function isCountable( $text )
 210         {
 211                 global $wgUseCommaCount, $wgMwRedir;
 212
 213                 if ( 0 != $this->mTitle->getNamespace() ) { return 0; }
 214                 if ( $wgMwRedir->matchStart( $text ) ) { return 0; }
 215                 $token = ($wgUseCommaCount ? "," : "[[" );
 216                 if ( false === strstr( $text, $token ) ) { return 0; }
 217                 return 1;
 218         }
 219
 220         # Load the field related to the last edit time of the article.
 221         # This isn't necessary for all uses, so it's only done if needed.
 222
 223         /* private */ function loadLastEdit()
 224         {
 225                 global $wgOut;
 226                 if ( -1 != $this->mUser ) return;
 227
 228                 $sql = "SELECT cur_user,cur_user_text,cur_timestamp," .
 229                   "cur_comment,cur_minor_edit FROM cur WHERE " .
 230                   "cur_id=" . $this->getID();
 231                 $res = wfQuery( $sql, DB_READ, "Article::loadLastEdit" );
 232
 233                 if ( wfNumRows( $res ) > 0 ) {
 234                         $s = wfFetchObject( $res );
 235                         $this->mUser = $s->cur_user;
 236                         $this->mUserText = $s->cur_user_text;
 237                         $this->mTimestamp = $s->cur_timestamp;
 238                         $this->mComment = $s->cur_comment;
 239                         $this->mMinorEdit = $s->cur_minor_edit;
 240                 }
 241         }
 242
 243         function getTimestamp()
 244         {
 245                 $this->loadLastEdit();
 246                 return $this->mTimestamp;
 247         }
 248
 249         function getUser()
 250         {
 251                 $this->loadLastEdit();
 252                 return $this->mUser;
 253         }
 254
 255         function getUserText()
 256         {
 257                 $this->loadLastEdit();
 258                 return $this->mUserText;
 259         }
 260
 261         function getComment()
 262         {
 263                 $this->loadLastEdit();
 264                 return $this->mComment;
 265         }
 266
 267         function getMinorEdit()
 268         {
 269                 $this->loadLastEdit();
 270                 return $this->mMinorEdit;
 271         }
 272
 273         # This is the default action of the script: just view the page of
 274         # the given title.
 275
 276         function view()
 277         {
 278                 global $wgUser, $wgOut, $wgLang;
 279                 global $oldid, $diff; # From query
 280                 global $wgLinkCache, $IP;
 281                 $fname = "Article::view";
 282                 wfProfileIn( $fname );
 283
 284                 $wgOut->setArticleFlag( true );
 285                 $wgOut->setRobotpolicy( "index,follow" );
 286
 287                 # If we got diff and oldid in the query, we want to see a
 288                 # diff page instead of the article.
 289
 290                 if ( isset( $diff ) ) {
 291                         $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
 292                         $de = new DifferenceEngine( $oldid, $diff );
 293                         $de->showDiffPage();
 294                         wfProfileOut( $fname );
 295                         return;
 296                 }
 297
 298                 if ( !isset( $oldid ) ) {
 299                         if( $this->checkTouched() ) {
 300                                 $wgOut->checkLastModified( $this->mTouched );
 301                                 $this->tryFileCache();
 302                         }
 303                 }
 304
 305                 $text = $this->getContent(); # May change mTitle
 306                 $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
 307                 $wgOut->setHTMLTitle( $this->mTitle->getPrefixedText() .
 308                   " - " . wfMsg( "wikititlesuffix" ) );
 309
 310                 # We're looking at an old revision
 311
 312                 if ( $oldid ) {
 313                         $this->setOldSubtitle();
 314                         $wgOut->setRobotpolicy( "noindex,follow" );
 315                 }
 316                 if ( "" != $this->mRedirectedFrom ) {
 317                         $sk = $wgUser->getSkin();
 318                         $redir = $sk->makeKnownLink( $this->mRedirectedFrom, "",
 319                           "redirect=no" );
 320                         $s = wfMsg( "redirectedfrom", $redir );
 321                         $wgOut->setSubtitle( $s );
 322                 }
 323                 $wgLinkCache->preFill( $this->mTitle );
 324                 $wgOut->addWikiText( $text );
 325
 326                 $this->viewUpdates();
 327                 wfProfileOut( $fname );
 328         }
 329
 330         # Theoretically we could defer these whole insert and update
 331         # functions for after display, but that's taking a big leap
 332         # of faith, and we want to be able to report database
 333         # errors at some point.
 334
 335         /* private */ function insertNewArticle( $text, $summary, $isminor, $watchthis )
 336         {
 337                 global $wgOut, $wgUser, $wgLinkCache, $wgMwRedir;
 338                 global $wgEnablePersistentLC;
 339
 340                 $fname = "Article::insertNewArticle";
 341
 342                 $this->mCountAdjustment = $this->isCountable( $text );
 343
 344                 $ns = $this->mTitle->getNamespace();
 345                 $ttl = $this->mTitle->getDBkey();
 346                 $text = $this->preSaveTransform( $text );
 347                 if ( $wgMwRedir->matchStart( $text ) ) { $redir = 1; }
 348                 else { $redir = 0; }
 349
 350                 $now = wfTimestampNow();
 351                 $won = wfInvertTimestamp( $now );
 352                 wfSeedRandom();
 353                 $rand = number_format( mt_rand() / mt_getrandmax(), 12, ".", "" );
 354                 $sql = "INSERT INTO cur (cur_namespace,cur_title,cur_text," .
 355                   "cur_comment,cur_user,cur_timestamp,cur_minor_edit,cur_counter," .
 356                   "cur_restrictions,cur_user_text,cur_is_redirect," .
 357                   "cur_is_new,cur_random,cur_touched,inverse_timestamp) VALUES ({$ns},'" . wfStrencode( $ttl ) . "', '" .
 358                   wfStrencode( $text ) . "', '" .
 359                   wfStrencode( $summary ) . "', '" .
 360                   $wgUser->getID() . "', '{$now}', " .
 361                   ( $isminor ? 1 : 0 ) . ", 0, '', '" .
 362                   wfStrencode( $wgUser->getName() ) . "', $redir, 1, $rand, '{$now}', '{$won}')";
 363                 $res = wfQuery( $sql, DB_WRITE, $fname );
 364
 365                 $newid = wfInsertId();
 366                 $this->mTitle->resetArticleID( $newid );
 367
 368                 if ( $wgEnablePersistentLC ) {
 369                         // Purge related entries in links cache on new page, to heal broken links
 370                         $ptitle = wfStrencode( $ttl );
 371                         wfQuery("DELETE linkscc FROM linkscc,brokenlinks ".
 372                                 "WHERE lcc_pageid=bl_from AND bl_to='{$ptitle}'", DB_WRITE);
 373                 }
 374
 375                 $sql = "INSERT INTO recentchanges (rc_timestamp,rc_cur_time," .
 376                   "rc_namespace,rc_title,rc_new,rc_minor,rc_cur_id,rc_user," .
 377                   "rc_user_text,rc_comment,rc_this_oldid,rc_last_oldid,rc_bot) VALUES (" .
 378                   "'{$now}','{$now}',{$ns},'" . wfStrencode( $ttl ) . "',1," .
 379                   ( $isminor ? 1 : 0 ) . ",{$newid}," . $wgUser->getID() . ",'" .
 380                   wfStrencode( $wgUser->getName() ) . "','" .
 381                   wfStrencode( $summary ) . "',0,0," .
 382                   ( $wgUser->isBot() ? 1 : 0 ) . ")";
 383                 wfQuery( $sql, DB_WRITE, $fname );
 384                 if ($watchthis) {
 385                         if(!$this->mTitle->userIsWatching()) $this->watch();
 386                 } else {
 387                         if ( $this->mTitle->userIsWatching() ) {
 388                                 $this->unwatch();
 389                         }
 390                 }
 391
 392                 # The talk page isn't in the regular link tables, so we need to update manually:
 393                 $talkns = $ns ^ 1; # talk -> normal; normal -> talk
 394                 $sql = "UPDATE cur set cur_touched='$now' WHERE cur_namespace=$talkns AND cur_title='" . wfStrencode( $ttl ) . "'";
 395                 wfQuery( $sql, DB_WRITE );
 396
 397                 $this->showArticle( $text, wfMsg( "newarticle" ) );
 398         }
 399
 400         function updateArticle( $text, $summary, $minor, $watchthis, $section = "")
 401         {
 402                 global $wgOut, $wgUser, $wgLinkCache;
 403                 global $wgDBtransactions, $wgMwRedir;
 404                 $fname = "Article::updateArticle";
 405
 406                 $this->loadLastEdit();
 407
 408                 // insert updated section into old text if we have only edited part
 409                 // of the article
 410                 if ($section != "") {
 411                         $oldtext=$this->getContent();
 412                         if($section=="new") {
 413                                 if($summary) $subject="== {$summary} ==\n\n";
 414                                 $text=$oldtext."\n\n".$subject.$text;
 415                         } else {
 416                                 $secs=preg_split("/(^=+.*?=+|^<h[1-6].*?>.*?<\/h[1-6].*?>)/mi",
 417                                   $oldtext,-1,PREG_SPLIT_DELIM_CAPTURE);
 418                                 $secs[$section*2]=$text."\n\n"; // replace with edited
 419                                 if($section) { $secs[$section*2-1]=""; } // erase old headline
 420                                 $text=join("",$secs);
 421                         }
 422                 }
 423                 if ( $this->mMinorEdit ) { $me1 = 1; } else { $me1 = 0; }
 424                 if ( $minor ) { $me2 = 1; } else { $me2 = 0; }
 425                 if ( preg_match( "/^((" . $wgMwRedir->getBaseRegex() . ")[^\\n]+)/i", $text, $m ) ) {
 426                         $redir = 1;
 427                         $text = $m[1] . "\n"; # Remove all content but redirect
 428                 }
 429                 else { $redir = 0; }
 430
 431                 $text = $this->preSaveTransform( $text );
 432
 433                 # Update article, but only if changed.
 434
 435                 if( $wgDBtransactions ) {
 436                         $sql = "BEGIN";
 437                         wfQuery( $sql, DB_WRITE );
 438                 }
 439                 $oldtext = $this->getContent( true );
 440
 441                 if ( 0 != strcmp( $text, $oldtext ) ) {
 442                         $this->mCountAdjustment = $this->isCountable( $text )
 443                           - $this->isCountable( $oldtext );
 444
 445                         $now = wfTimestampNow();
 446                         $won = wfInvertTimestamp( $now );
 447                         $sql = "UPDATE cur SET cur_text='" . wfStrencode( $text ) .
 448                           "',cur_comment='" .  wfStrencode( $summary ) .
 449                           "',cur_minor_edit={$me2}, cur_user=" . $wgUser->getID() .
 450                           ",cur_timestamp='{$now}',cur_user_text='" .
 451                           wfStrencode( $wgUser->getName() ) .
 452                           "',cur_is_redirect={$redir}, cur_is_new=0, cur_touched='{$now}', inverse_timestamp='{$won}' " .
 453                           "WHERE cur_id=" . $this->getID() .
 454                           " AND cur_timestamp='" . $this->getTimestamp() . "'";
 455                         $res = wfQuery( $sql, DB_WRITE, $fname );
 456
 457                         if( wfAffectedRows() == 0 ) {
 458                                 /* Belated edit conflict! Run away!! */
 459                                 return false;
 460                         }
 461
 462                         $sql = "INSERT INTO old (old_namespace,old_title,old_text," .
 463                           "old_comment,old_user,old_user_text,old_timestamp," .
 464                           "old_minor_edit,inverse_timestamp) VALUES (" .
 465                           $this->mTitle->getNamespace() . ", '" .
 466                           wfStrencode( $this->mTitle->getDBkey() ) . "', '" .
 467                           wfStrencode( $oldtext ) . "', '" .
 468                           wfStrencode( $this->getComment() ) . "', " .
 469                           $this->getUser() . ", '" .
 470                           wfStrencode( $this->getUserText() ) . "', '" .
 471                           $this->getTimestamp() . "', " . $me1 . ", '" .
 472                           wfInvertTimestamp( $this->getTimestamp() ) . "')";
 473                         $res = wfQuery( $sql, DB_WRITE, $fname );
 474                         $oldid = wfInsertID( $res );
 475
 476                         $sql = "INSERT INTO recentchanges (rc_timestamp,rc_cur_time," .
 477                           "rc_namespace,rc_title,rc_new,rc_minor,rc_bot,rc_cur_id,rc_user," .
 478                           "rc_user_text,rc_comment,rc_this_oldid,rc_last_oldid) VALUES (" .
 479                           "'{$now}','{$now}'," . $this->mTitle->getNamespace() . ",'" .
 480                           wfStrencode( $this->mTitle->getDBkey() ) . "',0,{$me2}," .
 481                           ( $wgUser->isBot() ? 1 : 0 ) . "," .
 482                           $this->getID() . "," . $wgUser->getID() . ",'" .
 483                           wfStrencode( $wgUser->getName() ) . "','" .
 484                           wfStrencode( $summary ) . "',0,{$oldid})";
 485                         wfQuery( $sql, DB_WRITE, $fname );
 486
 487                         $sql = "UPDATE recentchanges SET rc_this_oldid={$oldid} " .
 488                           "WHERE rc_namespace=" . $this->mTitle->getNamespace() . " AND " .
 489                           "rc_title='" . wfStrencode( $this->mTitle->getDBkey() ) . "' AND " .
 490                           "rc_timestamp='" . $this->getTimestamp() . "'";
 491                         wfQuery( $sql, DB_WRITE, $fname );
 492
 493                         $sql = "UPDATE recentchanges SET rc_cur_time='{$now}' " .
 494                           "WHERE rc_cur_id=" . $this->getID();
 495                         wfQuery( $sql, DB_WRITE, $fname );
 496
 497                         global $wgEnablePersistentLC;
 498                         if ( $wgEnablePersistentLC ) {
 499
 500                                 // Purge link cache for this page
 501                                 $pageid=$this->getID();
 502                                 wfQuery("DELETE FROM linkscc WHERE lcc_pageid='{$pageid}'", DB_WRITE);
 503
 504                                 // This next query just makes sure stub colored links to this page
 505                                 // are updated correctly (I think). If performance is more important
 506                                 // than real-time updating of stub links, we really should skip
 507                                 // this query.
 508                                 wfQuery("DELETE linkscc FROM linkscc,links ".
 509                                         "WHERE lcc_title=links.l_from AND l_to={$pageid}", DB_WRITE);
 510                         }
 511
 512                 }
 513                 if( $wgDBtransactions ) {
 514                         $sql = "COMMIT";
 515                         wfQuery( $sql, DB_WRITE );
 516                 }
 517
 518                 if ($watchthis) {
 519                         if (!$this->mTitle->userIsWatching()) $this->watch();
 520                 } else {
 521                         if ( $this->mTitle->userIsWatching() ) {
 522                                 $this->unwatch();
 523                         }
 524                 }
 525
 526                 $this->showArticle( $text, wfMsg( "updated" ) );
 527                 return true;
 528         }
 529
 530         # After we've either updated or inserted the article, update
 531         # the link tables and redirect to the new page.
 532
 533         function showArticle( $text, $subtitle )
 534         {
 535                 global $wgOut, $wgUser, $wgLinkCache, $wgUseBetterLinksUpdate;
 536                 global $wgMwRedir;
 537
 538                 $wgLinkCache = new LinkCache();
 539
 540                 # Get old version of link table to allow incremental link updates
 541                 if ( $wgUseBetterLinksUpdate ) {
 542                         $wgLinkCache->preFill( $this->mTitle );
 543                         $wgLinkCache->clear();
 544                 }
 545
 546                 # Now update the link cache by parsing the text
 547                 $wgOut = new OutputPage();
 548                 $wgOut->addWikiText( $text );
 549
 550                 $this->editUpdates( $text );
 551                 if( $wgMwRedir->matchStart( $text ) )
 552                         $r = "redirect=no";
 553                 else
 554                         $r = "";
 555                 $wgOut->redirect( wfLocalUrl( $this->mTitle->getPrefixedURL(), $r ) );
 556         }
 557
 558         # Add this page to my watchlist
 559
 560         function watch( $add = true )
 561         {
 562                 global $wgUser, $wgOut, $wgLang;
 563                 global $wgDeferredUpdateList;
 564
 565                 if ( 0 == $wgUser->getID() ) {
 566                         $wgOut->errorpage( "watchnologin", "watchnologintext" );
 567                         return;
 568                 }
 569                 if ( wfReadOnly() ) {
 570                         $wgOut->readOnlyPage();
 571                         return;
 572                 }
 573                 if( $add )
 574                         $wgUser->addWatch( $this->mTitle );
 575                 else
 576                         $wgUser->removeWatch( $this->mTitle );
 577
 578                 $wgOut->setPagetitle( wfMsg( $add ? "addedwatch" : "removedwatch" ) );
 579                 $wgOut->setRobotpolicy( "noindex,follow" );
 580
 581                 $sk = $wgUser->getSkin() ;
 582                 $link = $sk->makeKnownLink ( $this->mTitle->getPrefixedText() ) ;
 583
 584                 if($add)
 585                         $text = wfMsg( "addedwatchtext", $link );
 586                 else
 587                         $text = wfMsg( "removedwatchtext", $link );
 588                 $wgOut->addHTML( $text );
 589
 590                 $up = new UserUpdate();
 591                 array_push( $wgDeferredUpdateList, $up );
 592
 593                 $wgOut->returnToMain( false );
 594         }
 595
 596         function unwatch()
 597         {
 598                 $this->watch( false );
 599         }
 600
 601         # This shares a lot of issues (and code) with Recent Changes
 602
 603         function history()
 604         {
 605                 global $wgUser, $wgOut, $wgLang, $offset, $limit;
 606
 607                 # If page hasn't changed, client can cache this
 608
 609                 $wgOut->checkLastModified( $this->getTimestamp() );
 610                 $fname = "Article::history";
 611                 wfProfileIn( $fname );
 612
 613                 $wgOut->setPageTitle( $this->mTitle->getPRefixedText() );
 614                 $wgOut->setSubtitle( wfMsg( "revhistory" ) );
 615                 $wgOut->setArticleFlag( false );
 616                 $wgOut->setRobotpolicy( "noindex,nofollow" );
 617
 618                 if( $this->mTitle->getArticleID() == 0 ) {
 619                         $wgOut->addHTML( wfMsg( "nohistory" ) );
 620                         wfProfileOut( $fname );
 621                         return;
 622                 }
 623
 624                 $offset = (int)$offset;
 625                 $limit = (int)$limit;
 626                 if( $limit == 0 ) $limit = 50;
 627                 $namespace = $this->mTitle->getNamespace();
 628                 $title = $this->mTitle->getText();
 629                 $sql = "SELECT old_id,old_user," .
 630                   "old_comment,old_user_text,old_timestamp,old_minor_edit ".
 631                   "FROM old USE INDEX (name_title_timestamp) " .
 632                   "WHERE old_namespace={$namespace} AND " .
 633                   "old_title='" . wfStrencode( $this->mTitle->getDBkey() ) . "' " .
 634                   "ORDER BY inverse_timestamp LIMIT $offset, $limit";
 635                 $res = wfQuery( $sql, DB_READ, "Article::history" );
 636
 637                 $revs = wfNumRows( $res );
 638                 if( $this->mTitle->getArticleID() == 0 ) {
 639                         $wgOut->addHTML( wfMsg( "nohistory" ) );
 640                         wfProfileOut( $fname );
 641                         return;
 642                 }
 643
 644                 $sk = $wgUser->getSkin();
 645                 $numbar = wfViewPrevNext(
 646                         $offset, $limit,
 647                         $this->mTitle->getPrefixedText(),
 648                         "action=history" );
 649                 $s = $numbar;
 650                 $s .= $sk->beginHistoryList();
 651
 652                 if($offset == 0 )
 653                 $s .= $sk->historyLine( $this->getTimestamp(), $this->getUser(),
 654                   $this->getUserText(), $namespace,
 655                   $title, 0, $this->getComment(),
 656                   ( $this->getMinorEdit() > 0 ) );
 657
 658                 $revs = wfNumRows( $res );
 659                 while ( $line = wfFetchObject( $res ) ) {
 660                         $s .= $sk->historyLine( $line->old_timestamp, $line->old_user,
 661                           $line->old_user_text, $namespace,
 662                           $title, $line->old_id,
 663                           $line->old_comment, ( $line->old_minor_edit > 0 ) );
 664                 }
 665                 $s .= $sk->endHistoryList();
 666                 $s .= $numbar;
 667                 $wgOut->addHTML( $s );
 668                 wfProfileOut( $fname );
 669         }
 670
 671         function protect( $limit = "sysop" )
 672         {
 673                 global $wgUser, $wgOut;
 674
 675                 if ( ! $wgUser->isSysop() ) {
 676                         $wgOut->sysopRequired();
 677                         return;
 678                 }
 679                 if ( wfReadOnly() ) {
 680                         $wgOut->readOnlyPage();
 681                         return;
 682                 }
 683                 $id = $this->mTitle->getArticleID();
 684                 if ( 0 == $id ) {
 685                         $wgOut->fatalEror( wfMsg( "badarticleerror" ) );
 686                         return;
 687                 }
 688         $sql = "UPDATE cur SET cur_touched='" . wfTimestampNow() . "'," .
 689                         "cur_restrictions='{$limit}' WHERE cur_id={$id}";
 690                 wfQuery( $sql, DB_WRITE, "Article::protect" );
 691
 692                 $log = new LogPage( wfMsg( "protectlogpage" ), wfMsg( "protectlogtext" ) );
 693                 if ( $limit === "" ) {
 694                         $log->addEntry( wfMsg( "unprotectedarticle", $this->mTitle->getPrefixedText() ), "" );
 695                 } else {
 696                         $log->addEntry( wfMsg( "protectedarticle", $this->mTitle->getPrefixedText() ), "" );
 697                 }
 698                 $wgOut->redirect( wfLocalUrl( $this->mTitle->getPrefixedURL() ) );
 699         }
 700
 701         function unprotect()
 702         {
 703                 return $this->protect( "" );
 704         }
 705
 706         function delete()
 707         {
 708                 global $wgUser, $wgOut;
 709                 global $wpConfirm, $wpReason, $image, $oldimage;
 710
 711                 # This code desperately needs to be totally rewritten
 712
 713                 if ( ( ! $wgUser->isSysop() ) ) {
 714                         $wgOut->sysopRequired();
 715                         return;
 716                 }
 717                 if ( wfReadOnly() ) {
 718                         $wgOut->readOnlyPage();
 719                         return;
 720                 }
 721
 722                 # Better double-check that it hasn't been deleted yet!
 723                 $wgOut->setPagetitle( wfMsg( "confirmdelete" ) );
 724                 if ( ( "" == trim( $this->mTitle->getText() ) )
 725                   or ( $this->mTitle->getArticleId() == 0 ) ) {
 726                         $wgOut->fatalError( wfMsg( "cannotdelete" ) );
 727                         return;
 728                 }
 729
 730                 if ( $_POST["wpConfirm"] ) {
 731                         $this->doDelete();
 732                         return;
 733                 }
 734
 735                 # determine whether this page has earlier revisions
 736                 # and insert a warning if it does
 737                 # we select the text because it might be useful below
 738                 $ns = $this->mTitle->getNamespace();
 739                 $title = $this->mTitle->getDBkey();
 740                 $etitle = wfStrencode( $title );
 741                 $sql = "SELECT old_text FROM old WHERE old_namespace=$ns and old_title='$etitle' ORDER BY inverse_timestamp LIMIT 1";
 742                 $res = wfQuery( $sql, DB_READ, $fname );
 743                 if( ($old=wfFetchObject($res)) && !$wpConfirm ) {
 744                         $skin=$wgUser->getSkin();
 745                         $wgOut->addHTML("<B>".wfMsg("historywarning"));
 746                         $wgOut->addHTML( $skin->historyLink() ."</B><P>");
 747                 }
 748
 749                 $sql="SELECT cur_text FROM cur WHERE cur_namespace=$ns and cur_title='$etitle'";
 750                 $res=wfQuery($sql, DB_READ, $fname);
 751                 if( ($s=wfFetchObject($res))) {
 752
 753                         # if this is a mini-text, we can paste part of it into the deletion reason
 754
 755                         #if this is empty, an earlier revision may contain "useful" text
 756                         if($s->cur_text!="") {
 757                                 $text=$s->cur_text;
 758                         } else {
 759                                 if($old) {
 760                                         $text=$old->old_text;
 761                                         $blanked=1;
 762                                 }
 763
 764                         }
 765
 766                         $length=strlen($text);
 767
 768                         # this should not happen, since it is not possible to store an empty, new
 769                         # page. Let's insert a standard text in case it does, though
 770                         if($length==0 && !$wpReason) { $wpReason=wfmsg("exblank");}
 771
 772
 773                         if($length < 500 && !$wpReason) {
 774
 775                                 # comment field=255, let's grep the first 150 to have some user
 776                                 # space left
 777                                 $text=substr($text,0,150);
 778                                 # let's strip out newlines and HTML tags
 779                                 $text=preg_replace("/\"/","'",$text);
 780                                 $text=preg_replace("/\</","&lt;",$text);
 781                                 $text=preg_replace("/\>/","&gt;",$text);
 782                                 $text=preg_replace("/[\n\r]/","",$text);
 783                                 if(!$blanked) {
 784                                         $wpReason=wfMsg("excontent"). " '".$text;
 785                                 } else {
 786                                         $wpReason=wfMsg("exbeforeblank") . " '".$text;
 787                                 }
 788                                 if($length>150) { $wpReason .= "..."; } # we've only pasted part of the text
 789                                 $wpReason.="'";
 790                         }
 791                 }
 792
 793                 return $this->confirmDelete();
 794         }
 795
 796         function confirmDelete( $par = "" )
 797         {
 798                 global $wgOut;
 799                 global $wpReason;
 800
 801                 wfDebug( "Article::confirmDelete\n" );
 802
 803                 $sub = htmlspecialchars( $this->mTitle->getPrefixedText() );
 804                 $wgOut->setSubtitle( wfMsg( "deletesub", $sub ) );
 805                 $wgOut->setRobotpolicy( "noindex,nofollow" );
 806                 $wgOut->addWikiText( wfMsg( "confirmdeletetext" ) );
 807
 808                 $t = $this->mTitle->getPrefixedURL();
 809
 810                 $formaction = wfEscapeHTML( wfLocalUrl( $t, "action=delete" . $par ) );
 811                 $confirm = wfMsg( "confirm" );
 812                 $check = wfMsg( "confirmcheck" );
 813                 $delcom = wfMsg( "deletecomment" );
 814
 815                 $wgOut->addHTML( "
 816 <form id=\"deleteconfirm\" method=\"post\" action=\"{$formaction}\">
 817 <table border=0><tr><td align=right>
 818 {$delcom}:</td><td align=left>
 819 <input type=text size=60 name=\"wpReason\" value=\"" . htmlspecialchars( $wpReason ) . "\">
 820 </td></tr><tr><td>&nbsp;</td></tr>
 821 <tr><td align=right>
 822 <input type=checkbox name=\"wpConfirm\" value='1' id=\"wpConfirm\">
 823 </td><td><label for=\"wpConfirm\">{$check}</label></td>
 824 </tr><tr><td>&nbsp;</td><td>
 825 <input type=submit name=\"wpConfirmB\" value=\"{$confirm}\">
 826 </td></tr></table></form>\n" );
 827
 828                 $wgOut->returnToMain( false );
 829         }
 830
 831         function doDelete()
 832         {
 833                 global $wgOut, $wgUser, $wgLang;
 834                 global $wpReason;
 835                 $fname = "Article::doDelete";
 836                 wfDebug( "$fname\n" );
 837
 838                 $this->doDeleteArticle( $this->mTitle );
 839                 $deleted = $this->mTitle->getPrefixedText();
 840
 841                 $wgOut->setPagetitle( wfMsg( "actioncomplete" ) );
 842                 $wgOut->setRobotpolicy( "noindex,nofollow" );
 843
 844                 $sk = $wgUser->getSkin();
 845                 $loglink = $sk->makeKnownLink( $wgLang->getNsText(
 846                   Namespace::getWikipedia() ) .
 847                   ":" . wfMsg( "dellogpage" ), wfMsg( "deletionlog" ) );
 848
 849                 $text = wfMsg( "deletedtext", $deleted, $loglink );
 850
 851                 $wgOut->addHTML( "<p>" . $text );
 852                 $wgOut->returnToMain( false );
 853         }
 854
 855         function doDeleteArticle( $title )
 856         {
 857                 global $wgUser, $wgOut, $wgLang, $wpReason, $wgDeferredUpdateList,
 858                         $wgEnablePersistentLC;
 859
 860                 $fname = "Article::doDeleteArticle";
 861                 wfDebug( "$fname\n" );
 862
 863                 $ns = $title->getNamespace();
 864                 $t = wfStrencode( $title->getDBkey() );
 865                 $id = $title->getArticleID();
 866
 867                 if ( "" == $t ) {
 868                         $wgOut->fatalError( wfMsg( "cannotdelete" ) );
 869                         return;
 870                 }
 871
 872                 $u = new SiteStatsUpdate( 0, 1, -$this->isCountable( $this->getContent( true ) ) );
 873                 array_push( $wgDeferredUpdateList, $u );
 874
 875                 # Move article and history to the "archive" table
 876                 $sql = "INSERT INTO archive (ar_namespace,ar_title,ar_text," .
 877                   "ar_comment,ar_user,ar_user_text,ar_timestamp,ar_minor_edit," .
 878                   "ar_flags) SELECT cur_namespace,cur_title,cur_text,cur_comment," .
 879                   "cur_user,cur_user_text,cur_timestamp,cur_minor_edit,0 FROM cur " .
 880                   "WHERE cur_namespace={$ns} AND cur_title='{$t}'";
 881                 wfQuery( $sql, DB_WRITE, $fname );
 882
 883                 $sql = "INSERT INTO archive (ar_namespace,ar_title,ar_text," .
 884                   "ar_comment,ar_user,ar_user_text,ar_timestamp,ar_minor_edit," .
 885                   "ar_flags) SELECT old_namespace,old_title,old_text,old_comment," .
 886                   "old_user,old_user_text,old_timestamp,old_minor_edit,old_flags " .
 887                   "FROM old WHERE old_namespace={$ns} AND old_title='{$t}'";
 888                 wfQuery( $sql, DB_WRITE, $fname );
 889
 890                 # Now that it's safely backed up, delete it
 891
 892                 $sql = "DELETE FROM cur WHERE cur_namespace={$ns} AND " .
 893                   "cur_title='{$t}'";
 894                 wfQuery( $sql, DB_WRITE, $fname );
 895
 896                 $sql = "DELETE FROM old WHERE old_namespace={$ns} AND " .
 897                   "old_title='{$t}'";
 898                 wfQuery( $sql, DB_WRITE, $fname );
 899
 900                 $sql = "DELETE FROM recentchanges WHERE rc_namespace={$ns} AND " .
 901                   "rc_title='{$t}'";
 902                 wfQuery( $sql, DB_WRITE, $fname );
 903
 904                 # Finally, clean up the link tables
 905
 906                 if ( 0 != $id ) {
 907
 908                         $t = wfStrencode( $title->getPrefixedDBkey() );
 909
 910                         if ( $wgEnablePersistentLC ) {
 911                                 // Purge related entries in links cache on delete,
 912                                 wfQuery("DELETE linkscc FROM linkscc,links ".
 913                                         "WHERE lcc_title=links.l_from AND l_to={$id}", DB_WRITE);
 914                                 wfQuery("DELETE FROM linkscc WHERE lcc_title='{$t}'", DB_WRITE);
 915                         }
 916
 917                         $sql = "SELECT l_from FROM links WHERE l_to={$id}";
 918                         $res = wfQuery( $sql, DB_READ, $fname );
 919
 920                         $sql = "INSERT INTO brokenlinks (bl_from,bl_to) VALUES ";
 921                         $now = wfTimestampNow();
 922                         $sql2 = "UPDATE cur SET cur_touched='{$now}' WHERE cur_id IN (";
 923                         $first = true;
 924
 925                         while ( $s = wfFetchObject( $res ) ) {
 926                                 $nt = Title::newFromDBkey( $s->l_from );
 927                                 $lid = $nt->getArticleID();
 928
 929                                 if ( ! $first ) { $sql .= ","; $sql2 .= ","; }
 930                                 $first = false;
 931                                 $sql .= "({$lid},'{$t}')";
 932                                 $sql2 .= "{$lid}";
 933                         }
 934                         $sql2 .= ")";
 935                         if ( ! $first ) {
 936                                 wfQuery( $sql, DB_WRITE, $fname );
 937                                 wfQuery( $sql2, DB_WRITE, $fname );
 938                         }
 939                         wfFreeResult( $res );
 940
 941                         $sql = "DELETE FROM links WHERE l_to={$id}";
 942                         wfQuery( $sql, DB_WRITE, $fname );
 943
 944                         $sql = "DELETE FROM links WHERE l_from='{$t}'";
 945                         wfQuery( $sql, DB_WRITE, $fname );
 946
 947                         $sql = "DELETE FROM imagelinks WHERE il_from='{$t}'";
 948                         wfQuery( $sql, DB_WRITE, $fname );
 949
 950                         $sql = "DELETE FROM brokenlinks WHERE bl_from={$id}";
 951                         wfQuery( $sql, DB_WRITE, $fname );
 952                 }
 953
 954                 $log = new LogPage( wfMsg( "dellogpage" ), wfMsg( "dellogpagetext" ) );
 955                 $art = $title->getPrefixedText();
 956                 $wpReason = wfCleanQueryVar( $wpReason );
 957                 $log->addEntry( wfMsg( "deletedarticle", $art ), $wpReason );
 958
 959                 # Clear the cached article id so the interface doesn't act like we exist
 960                 $this->mTitle->resetArticleID( 0 );
 961                 $this->mTitle->mArticleID = 0;
 962         }
 963
 964         function rollback()
 965         {
 966                 global $wgUser, $wgLang, $wgOut, $from;
 967
 968                 if ( ! $wgUser->isSysop() ) {
 969                         $wgOut->sysopRequired();
 970                         return;
 971                 }
 972
 973                 # Replace all this user's current edits with the next one down
 974                 $tt = wfStrencode( $this->mTitle->getDBKey() );
 975                 $n = $this->mTitle->getNamespace();
 976
 977                 # Get the last editor
 978                 $sql = "SELECT cur_id,cur_user,cur_user_text,cur_comment FROM cur WHERE cur_title='{$tt}' AND cur_namespace={$n}";
 979                 $res = wfQuery( $sql, DB_READ );
 980                 if( ($x = wfNumRows( $res )) != 1 ) {
 981                         # Something wrong
 982                         $wgOut->addHTML( wfMsg( "notanarticle" ) );
 983                         return;
 984                 }
 985                 $s = wfFetchObject( $res );
 986                 $ut = wfStrencode( $s->cur_user_text );
 987                 $uid = $s->cur_user;
 988                 $pid = $s->cur_id;
 989
 990                 $from = str_replace( '_', ' ', wfCleanQueryVar( $from ) );
 991                 if( $from != $s->cur_user_text ) {
 992                         $wgOut->setPageTitle(wfmsg("rollbackfailed"));
 993                         $wgOut->addWikiText( wfMsg( "alreadyrolled",
 994                                 htmlspecialchars( $this->mTitle->getPrefixedText()),
 995                                 htmlspecialchars( $from ),
 996                                 htmlspecialchars( $s->cur_user_text ) ) );
 997                         if($s->cur_comment != "") {
 998                                 $wgOut->addHTML(
 999                                         wfMsg("editcomment",
1000                                         htmlspecialchars( $s->cur_comment ) ) );
1001                                 }
1002                         return;
1003                 }
1004
1005                 # Get the last edit not by this guy
1006                 $sql = "SELECT old_text,old_user,old_user_text
1007                 FROM old USE INDEX (name_title_timestamp)
1008                 WHERE old_namespace={$n} AND old_title='{$tt}'
1009                 AND (old_user <> {$uid} OR old_user_text <> '{$ut}')
1010                 ORDER BY inverse_timestamp LIMIT 1";
1011                 $res = wfQuery( $sql, DB_READ );
1012                 if( wfNumRows( $res ) != 1 ) {
1013                         # Something wrong
1014                         $wgOut->setPageTitle(wfMsg("rollbackfailed"));
1015                         $wgOut->addHTML( wfMsg( "cantrollback" ) );
1016                         return;
1017                 }
1018                 $s = wfFetchObject( $res );
1019
1020                 # Save it!
1021                 $newcomment = wfMsg( "revertpage", $s->old_user_text );
1022                 $wgOut->setPagetitle( wfMsg( "actioncomplete" ) );
1023                 $wgOut->setRobotpolicy( "noindex,nofollow" );
1024                 $wgOut->addHTML( "<h2>" . $newcomment . "</h2>\n<hr>\n" );
1025                 $this->updateArticle( $s->old_text, $newcomment, 1, $this->mTitle->userIsWatching() );
1026
1027                 $wgOut->returnToMain( false );
1028         }
1029
1030
1031         # Do standard deferred updates after page view
1032
1033         /* private */ function viewUpdates()
1034         {
1035                 global $wgDeferredUpdateList;
1036
1037                 if ( 0 != $this->getID() ) {
1038                         global $wgDisableCounters;
1039                         if( !$wgDisableCounters ) {
1040                                 $u = new ViewCountUpdate( $this->getID() );
1041                                 array_push( $wgDeferredUpdateList, $u );
1042                                 $u = new SiteStatsUpdate( 1, 0, 0 );
1043                                 array_push( $wgDeferredUpdateList, $u );
1044                         }
1045                         $u = new UserTalkUpdate( 0, $this->mTitle->getNamespace(),
1046                           $this->mTitle->getDBkey() );
1047                         array_push( $wgDeferredUpdateList, $u );
1048                 }
1049         }
1050
1051         # Do standard deferred updates after page edit.
1052         # Every 1000th edit, prune the recent changes table.
1053
1054         /* private */ function editUpdates( $text )
1055         {
1056                 global $wgDeferredUpdateList, $wgDBname, $wgMemc;
1057
1058                 wfSeedRandom();
1059                 if ( 0 == mt_rand( 0, 999 ) ) {
1060                         $cutoff = wfUnix2Timestamp( time() - ( 7 * 86400 ) );
1061                         $sql = "DELETE FROM recentchanges WHERE rc_timestamp < '{$cutoff}'";
1062                         wfQuery( $sql, DB_WRITE );
1063                 }
1064                 $id = $this->getID();
1065                 $title = $this->mTitle->getPrefixedDBkey();
1066                 $adj = $this->mCountAdjustment;
1067
1068                 if ( 0 != $id ) {
1069                         $u = new LinksUpdate( $id, $title );
1070                         array_push( $wgDeferredUpdateList, $u );
1071                         $u = new SiteStatsUpdate( 0, 1, $adj );
1072                         array_push( $wgDeferredUpdateList, $u );
1073                         $u = new SearchUpdate( $id, $title, $text );
1074                         array_push( $wgDeferredUpdateList, $u );
1075
1076                         $u = new UserTalkUpdate( 1, $this->mTitle->getNamespace(),
1077                           $this->mTitle->getDBkey() );
1078                         array_push( $wgDeferredUpdateList, $u );
1079
1080                         if ( $this->getNamespace == NS_MEDIAWIKI ) {
1081                                 $messageCache = $wgMemc->get( "$wgDBname:messages" );
1082                                 if (!$messageCache) {
1083                                         $messageCache = wfLoadAllMessages();
1084                                 }
1085                                 $messageCache[$title] = $text;
1086                                 $wgMemc->set( "$wgDBname:messages" );
1087                         }
1088                 }
1089         }
1090
1091         /* private */ function setOldSubtitle()
1092         {
1093                 global $wgLang, $wgOut;
1094
1095                 $td = $wgLang->timeanddate( $this->mTimestamp, true );
1096                 $r = wfMsg( "revisionasof", $td );
1097                 $wgOut->setSubtitle( "({$r})" );
1098         }
1099
1100         # This function is called right before saving the wikitext,
1101         # so we can do things like signatures and links-in-context.
1102
1103         function preSaveTransform( $text )
1104         {
1105                 $s = "";
1106                 while ( "" != $text ) {
1107                         $p = preg_split( "/<\\s*nowiki\\s*>/i", $text, 2 );
1108                         $s .= $this->pstPass2( $p[0] );
1109
1110                         if ( ( count( $p ) < 2 ) || ( "" == $p[1] ) ) { $text = ""; }
1111                         else {
1112                                 $q = preg_split( "/<\\/\\s*nowiki\\s*>/i", $p[1], 2 );
1113                                 $s .= "<nowiki>{$q[0]}</nowiki>";
1114                                 $text = $q[1];
1115                         }
1116                 }
1117                 return rtrim( $s );
1118         }
1119
1120         /* private */ function pstPass2( $text )
1121         {
1122                 global $wgUser, $wgLang, $wgLocaltimezone;
1123
1124                 # Signatures
1125                 #
1126                 $n = $wgUser->getName();
1127                 $k = $wgUser->getOption( "nickname" );
1128                 if ( "" == $k ) { $k = $n; }
1129                 if(isset($wgLocaltimezone)) {
1130                         $oldtz = getenv("TZ"); putenv("TZ=$wgLocaltimezone");
1131                 }
1132                 /* Note: this is an ugly timezone hack for the European wikis */
1133                 $d = $wgLang->timeanddate( date( "YmdHis" ), false ) .
1134                   " (" . date( "T" ) . ")";
1135                 if(isset($wgLocaltimezone)) putenv("TZ=$oldtz");
1136
1137                 $text = preg_replace( "/~~~~/", "[[" . $wgLang->getNsText(
1138                   Namespace::getUser() ) . ":$n|$k]] $d", $text );
1139                 $text = preg_replace( "/~~~/", "[[" . $wgLang->getNsText(
1140                   Namespace::getUser() ) . ":$n|$k]]", $text );
1141
1142                 # Context links: [[|name]] and [[name (context)|]]
1143                 #
1144                 $tc = "[&;%\\-,.\\(\\)' _0-9A-Za-z\\/:\\x80-\\xff]";
1145                 $np = "[&;%\\-,.' _0-9A-Za-z\\/:\\x80-\\xff]"; # No parens
1146                 $namespacechar = '[ _0-9A-Za-z\x80-\xff]'; # Namespaces can use non-ascii!
1147                 $conpat = "/^({$np}+) \\(({$tc}+)\\)$/";
1148
1149                 $p1 = "/\[\[({$np}+) \\(({$np}+)\\)\\|]]/";             # [[page (context)|]]
1150                 $p2 = "/\[\[\\|({$tc}+)]]/";                                    # [[|page]]
1151                 $p3 = "/\[\[($namespacechar+):({$np}+)\\|]]/";          # [[namespace:page|]]
1152                 $p4 = "/\[\[($namespacechar+):({$np}+) \\(({$np}+)\\)\\|]]/";
1153                                                                                                                 # [[ns:page (cont)|]]
1154                 $context = "";
1155                 $t = $this->mTitle->getText();
1156                 if ( preg_match( $conpat, $t, $m ) ) {
1157                         $context = $m[2];
1158                 }
1159                 $text = preg_replace( $p4, "[[\\1:\\2 (\\3)|\\2]]", $text );
1160                 $text = preg_replace( $p1, "[[\\1 (\\2)|\\1]]", $text );
1161                 $text = preg_replace( $p3, "[[\\1:\\2|\\2]]", $text );
1162
1163                 if ( "" == $context ) {
1164                         $text = preg_replace( $p2, "[[\\1]]", $text );
1165                 } else {
1166                         $text = preg_replace( $p2, "[[\\1 ({$context})|\\1]]", $text );
1167                 }
1168
1169                 # {{SUBST:xxx}} variables
1170                 #
1171                 $mw =& MagicWord::get( MAG_SUBST );
1172                 $text = $mw->substituteCallback( $text, "wfReplaceSubstVar" );
1173
1174                 return $text;
1175         }
1176
1177         /* Caching functions */
1178
1179         function tryFileCache() {
1180                 static $called = false;
1181                 if( $called ) {
1182                         wfDebug( " tryFileCache() -- called twice!?\n" );
1183                         return;
1184                 }
1185                 $called = true;
1186                 if($this->isFileCacheable()) {
1187                         $touched = $this->mTouched;
1188                         if( strpos( $this->mContent, "{{" ) !== false ) {
1189                                 # Expire pages with variable replacements in an hour
1190                                 $expire = wfUnix2Timestamp( time() - 3600 );
1191                                 $touched = max( $expire, $touched );
1192                         }
1193                         $cache = new CacheManager( $this->mTitle );
1194                         if($cache->isFileCacheGood( $touched )) {
1195                                 global $wgOut;
1196                                 wfDebug( " tryFileCache() - about to load\n" );
1197                                 $cache->loadFromFileCache();
1198                                 $wgOut->reportTime(); # For profiling
1199                                 exit;
1200                         } else {
1201                                 wfDebug( " tryFileCache() - starting buffer\n" );
1202                                 if($cache->useGzip() && wfClientAcceptsGzip()) {
1203                                         /* For some reason, adding this header line over in
1204                                            CacheManager::saveToFileCache() fails on my test
1205                                            setup at home, though it works on the live install.
1206                                            Make double-sure...  --brion */
1207                                         header( "Content-Encoding: gzip" );
1208                                 }
1209                                 ob_start( array(&$cache, 'saveToFileCache' ) );
1210                         }
1211                 } else {
1212                         wfDebug( " tryFileCache() - not cacheable\n" );
1213                 }
1214         }
1215
1216         function isFileCacheable() {
1217                 global $wgUser, $wgUseFileCache, $wgShowIPinHeader;
1218                 global $action, $oldid, $diff, $redirect, $printable;
1219                 return $wgUseFileCache
1220                         and (!$wgShowIPinHeader)
1221                         and ($this->getID() != 0)
1222                         and ($wgUser->getId() == 0)
1223                         and (!$wgUser->getNewtalk())
1224                         and ($this->mTitle->getNamespace != Namespace::getSpecial())
1225                         and ($action == "view")
1226                         and (!isset($oldid))
1227                         and (!isset($diff))
1228                         and (!isset($redirect))
1229                         and (!isset($printable))
1230                         and (!$this->mRedirectedFrom);
1231         }
1232
1233         function checkTouched() {
1234                 $id = $this->getID();
1235                 $sql = "SELECT cur_touched,cur_is_redirect FROM cur WHERE cur_id=$id";
1236                 $res = wfQuery( $sql, DB_READ, "Article::checkTouched" );
1237                 if( $s = wfFetchObject( $res ) ) {
1238                         $this->mTouched = $s->cur_touched;
1239                         return !$s->cur_is_redirect;
1240                 } else {
1241                         return false;
1242                 }
1243         }
1244 }
1245
1246 function wfReplaceSubstVar( $matches ) {
1247         return wfMsg( $matches[1] );
1248 }
1249
1250 ?>