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 ) and $this->checkTouched() ) {
 299                         if( $wgOut->checkLastModified( $this->mTouched ) ){
 300                                 return;
 301                         } else if ( $this->tryFileCache() ) {
 302                                 # tell wgOut that output is taken care of
 303                                 $wgOut->disable();
 304                                 $this->viewUpdates();
 305                                 return;
 306                         }
 307                 }
 308
 309                 $text = $this->getContent(); # May change mTitle
 310                 $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
 311                 $wgOut->setHTMLTitle( $this->mTitle->getPrefixedText() .
 312                   " - " . wfMsg( "wikititlesuffix" ) );
 313
 314                 # We're looking at an old revision
 315
 316                 if ( $oldid ) {
 317                         $this->setOldSubtitle();
 318                         $wgOut->setRobotpolicy( "noindex,follow" );
 319                 }
 320                 if ( "" != $this->mRedirectedFrom ) {
 321                         $sk = $wgUser->getSkin();
 322                         $redir = $sk->makeKnownLink( $this->mRedirectedFrom, "",
 323                           "redirect=no" );
 324                         $s = wfMsg( "redirectedfrom", $redir );
 325                         $wgOut->setSubtitle( $s );
 326                 }
 327
 328                 $wgLinkCache->preFill( $this->mTitle );
 329                 $wgOut->addWikiText( $text );
 330
 331                 $this->viewUpdates();
 332                 wfProfileOut( $fname );
 333         }
 334
 335         # Theoretically we could defer these whole insert and update
 336         # functions for after display, but that's taking a big leap
 337         # of faith, and we want to be able to report database
 338         # errors at some point.
 339
 340         /* private */ function insertNewArticle( $text, $summary, $isminor, $watchthis )
 341         {
 342                 global $wgOut, $wgUser, $wgLinkCache, $wgMwRedir;
 343                 global $wgEnablePersistentLC;
 344
 345                 $fname = "Article::insertNewArticle";
 346
 347                 $this->mCountAdjustment = $this->isCountable( $text );
 348
 349                 $ns = $this->mTitle->getNamespace();
 350                 $ttl = $this->mTitle->getDBkey();
 351                 $text = $this->preSaveTransform( $text );
 352                 if ( $wgMwRedir->matchStart( $text ) ) { $redir = 1; }
 353                 else { $redir = 0; }
 354
 355                 $now = wfTimestampNow();
 356                 $won = wfInvertTimestamp( $now );
 357                 wfSeedRandom();
 358                 $rand = number_format( mt_rand() / mt_getrandmax(), 12, ".", "" );
 359                 $sql = "INSERT INTO cur (cur_namespace,cur_title,cur_text," .
 360                   "cur_comment,cur_user,cur_timestamp,cur_minor_edit,cur_counter," .
 361                   "cur_restrictions,cur_user_text,cur_is_redirect," .
 362                   "cur_is_new,cur_random,cur_touched,inverse_timestamp) VALUES ({$ns},'" . wfStrencode( $ttl ) . "', '" .
 363                   wfStrencode( $text ) . "', '" .
 364                   wfStrencode( $summary ) . "', '" .
 365                   $wgUser->getID() . "', '{$now}', " .
 366                   ( $isminor ? 1 : 0 ) . ", 0, '', '" .
 367                   wfStrencode( $wgUser->getName() ) . "', $redir, 1, $rand, '{$now}', '{$won}')";
 368                 $res = wfQuery( $sql, DB_WRITE, $fname );
 369
 370                 $newid = wfInsertId();
 371                 $this->mTitle->resetArticleID( $newid );
 372
 373                 if ( $wgEnablePersistentLC ) {
 374                         // Purge related entries in links cache on new page, to heal broken links
 375                         $ptitle = wfStrencode( $ttl );
 376                         wfQuery("DELETE linkscc FROM linkscc,brokenlinks ".
 377                                 "WHERE lcc_pageid=bl_from AND bl_to='{$ptitle}'", DB_WRITE);
 378                 }
 379
 380                 $sql = "INSERT INTO recentchanges (rc_timestamp,rc_cur_time," .
 381                   "rc_namespace,rc_title,rc_new,rc_minor,rc_cur_id,rc_user," .
 382                   "rc_user_text,rc_comment,rc_this_oldid,rc_last_oldid,rc_bot) VALUES (" .
 383                   "'{$now}','{$now}',{$ns},'" . wfStrencode( $ttl ) . "',1," .
 384                   ( $isminor ? 1 : 0 ) . ",{$newid}," . $wgUser->getID() . ",'" .
 385                   wfStrencode( $wgUser->getName() ) . "','" .
 386                   wfStrencode( $summary ) . "',0,0," .
 387                   ( $wgUser->isBot() ? 1 : 0 ) . ")";
 388                 wfQuery( $sql, DB_WRITE, $fname );
 389                 if ($watchthis) {
 390                         if(!$this->mTitle->userIsWatching()) $this->watch();
 391                 } else {
 392                         if ( $this->mTitle->userIsWatching() ) {
 393                                 $this->unwatch();
 394                         }
 395                 }
 396
 397                 # The talk page isn't in the regular link tables, so we need to update manually:
 398                 $talkns = $ns ^ 1; # talk -> normal; normal -> talk
 399                 $sql = "UPDATE cur set cur_touched='$now' WHERE cur_namespace=$talkns AND cur_title='" . wfStrencode( $ttl ) . "'";
 400                 wfQuery( $sql, DB_WRITE );
 401
 402                 $this->showArticle( $text, wfMsg( "newarticle" ) );
 403         }
 404
 405         function updateArticle( $text, $summary, $minor, $watchthis, $section = "", $forceBot = false )
 406         {
 407                 global $wgOut, $wgUser, $wgLinkCache;
 408                 global $wgDBtransactions, $wgMwRedir;
 409                 $fname = "Article::updateArticle";
 410
 411                 $this->loadLastEdit();
 412
 413                 // insert updated section into old text if we have only edited part
 414                 // of the article
 415                 if ($section != "") {
 416                         $oldtext=$this->getContent();
 417                         if($section=="new") {
 418                                 if($summary) $subject="== {$summary} ==\n\n";
 419                                 $text=$oldtext."\n\n".$subject.$text;
 420                         } else {
 421                                 $secs=preg_split("/(^=+.*?=+|^<h[1-6].*?>.*?<\/h[1-6].*?>)/mi",
 422                                   $oldtext,-1,PREG_SPLIT_DELIM_CAPTURE);
 423                                 $secs[$section*2]=$text."\n\n"; // replace with edited
 424                                 if($section) { $secs[$section*2-1]=""; } // erase old headline
 425                                 $text=join("",$secs);
 426                         }
 427                 }
 428                 if ( $this->mMinorEdit ) { $me1 = 1; } else { $me1 = 0; }
 429                 if ( $minor ) { $me2 = 1; } else { $me2 = 0; }
 430                 if ( preg_match( "/^((" . $wgMwRedir->getBaseRegex() . ")[^\\n]+)/i", $text, $m ) ) {
 431                         $redir = 1;
 432                         $text = $m[1] . "\n"; # Remove all content but redirect
 433                 }
 434                 else { $redir = 0; }
 435
 436                 $text = $this->preSaveTransform( $text );
 437
 438                 # Update article, but only if changed.
 439
 440                 if( $wgDBtransactions ) {
 441                         $sql = "BEGIN";
 442                         wfQuery( $sql, DB_WRITE );
 443                 }
 444                 $oldtext = $this->getContent( true );
 445
 446                 if ( 0 != strcmp( $text, $oldtext ) ) {
 447                         $this->mCountAdjustment = $this->isCountable( $text )
 448                           - $this->isCountable( $oldtext );
 449
 450                         $now = wfTimestampNow();
 451                         $won = wfInvertTimestamp( $now );
 452                         $sql = "UPDATE cur SET cur_text='" . wfStrencode( $text ) .
 453                           "',cur_comment='" .  wfStrencode( $summary ) .
 454                           "',cur_minor_edit={$me2}, cur_user=" . $wgUser->getID() .
 455                           ",cur_timestamp='{$now}',cur_user_text='" .
 456                           wfStrencode( $wgUser->getName() ) .
 457                           "',cur_is_redirect={$redir}, cur_is_new=0, cur_touched='{$now}', inverse_timestamp='{$won}' " .
 458                           "WHERE cur_id=" . $this->getID() .
 459                           " AND cur_timestamp='" . $this->getTimestamp() . "'";
 460                         $res = wfQuery( $sql, DB_WRITE, $fname );
 461
 462                         if( wfAffectedRows() == 0 ) {
 463                                 /* Belated edit conflict! Run away!! */
 464                                 return false;
 465                         }
 466
 467                         $sql = "INSERT INTO old (old_namespace,old_title,old_text," .
 468                           "old_comment,old_user,old_user_text,old_timestamp," .
 469                           "old_minor_edit,inverse_timestamp) VALUES (" .
 470                           $this->mTitle->getNamespace() . ", '" .
 471                           wfStrencode( $this->mTitle->getDBkey() ) . "', '" .
 472                           wfStrencode( $oldtext ) . "', '" .
 473                           wfStrencode( $this->getComment() ) . "', " .
 474                           $this->getUser() . ", '" .
 475                           wfStrencode( $this->getUserText() ) . "', '" .
 476                           $this->getTimestamp() . "', " . $me1 . ", '" .
 477                           wfInvertTimestamp( $this->getTimestamp() ) . "')";
 478                         $res = wfQuery( $sql, DB_WRITE, $fname );
 479                         $oldid = wfInsertID( $res );
 480
 481                         $bot = (int)($wgUser->isBot() || $forceBot);
 482
 483                         $sql = "INSERT INTO recentchanges (rc_timestamp,rc_cur_time," .
 484                           "rc_namespace,rc_title,rc_new,rc_minor,rc_bot,rc_cur_id,rc_user," .
 485                           "rc_user_text,rc_comment,rc_this_oldid,rc_last_oldid) VALUES (" .
 486                           "'{$now}','{$now}'," . $this->mTitle->getNamespace() . ",'" .
 487                           wfStrencode( $this->mTitle->getDBkey() ) . "',0,{$me2}," .
 488                           "$bot," . $this->getID() . "," . $wgUser->getID() . ",'" .
 489                           wfStrencode( $wgUser->getName() ) . "','" .
 490                           wfStrencode( $summary ) . "',0,{$oldid})";
 491                         wfQuery( $sql, DB_WRITE, $fname );
 492
 493                         $sql = "UPDATE recentchanges SET rc_this_oldid={$oldid} " .
 494                           "WHERE rc_namespace=" . $this->mTitle->getNamespace() . " AND " .
 495                           "rc_title='" . wfStrencode( $this->mTitle->getDBkey() ) . "' AND " .
 496                           "rc_timestamp='" . $this->getTimestamp() . "'";
 497                         wfQuery( $sql, DB_WRITE, $fname );
 498
 499                         $sql = "UPDATE recentchanges SET rc_cur_time='{$now}' " .
 500                           "WHERE rc_cur_id=" . $this->getID();
 501                         wfQuery( $sql, DB_WRITE, $fname );
 502
 503                         global $wgEnablePersistentLC;
 504                         if ( $wgEnablePersistentLC ) {
 505                                 // Purge link cache for this page
 506                                 $pageid=$this->getID();
 507                                 wfQuery("DELETE FROM linkscc WHERE lcc_pageid='{$pageid}'", DB_WRITE);
 508                         }
 509                 }
 510
 511                 if( $wgDBtransactions ) {
 512                         $sql = "COMMIT";
 513                         wfQuery( $sql, DB_WRITE );
 514                 }
 515
 516                 if ($watchthis) {
 517                         if (!$this->mTitle->userIsWatching()) $this->watch();
 518                 } else {
 519                         if ( $this->mTitle->userIsWatching() ) {
 520                                 $this->unwatch();
 521                         }
 522                 }
 523
 524                 $this->showArticle( $text, wfMsg( "updated" ) );
 525                 return true;
 526         }
 527
 528         # After we've either updated or inserted the article, update
 529         # the link tables and redirect to the new page.
 530
 531         function showArticle( $text, $subtitle )
 532         {
 533                 global $wgOut, $wgUser, $wgLinkCache, $wgUseBetterLinksUpdate;
 534                 global $wgMwRedir;
 535
 536                 $wgLinkCache = new LinkCache();
 537
 538                 # Get old version of link table to allow incremental link updates
 539                 if ( $wgUseBetterLinksUpdate ) {
 540                         $wgLinkCache->preFill( $this->mTitle );
 541                         $wgLinkCache->clear();
 542                 }
 543
 544                 # Now update the link cache by parsing the text
 545                 $wgOut = new OutputPage();
 546                 $wgOut->addWikiText( $text );
 547
 548                 $this->editUpdates( $text );
 549                 if( $wgMwRedir->matchStart( $text ) )
 550                         $r = "redirect=no";
 551                 else
 552                         $r = "";
 553                 $wgOut->redirect( wfLocalUrl( $this->mTitle->getPrefixedURL(), $r ) );
 554         }
 555
 556         # Add this page to my watchlist
 557
 558         function watch( $add = true )
 559         {
 560                 global $wgUser, $wgOut, $wgLang;
 561                 global $wgDeferredUpdateList;
 562
 563                 if ( 0 == $wgUser->getID() ) {
 564                         $wgOut->errorpage( "watchnologin", "watchnologintext" );
 565                         return;
 566                 }
 567                 if ( wfReadOnly() ) {
 568                         $wgOut->readOnlyPage();
 569                         return;
 570                 }
 571                 if( $add )
 572                         $wgUser->addWatch( $this->mTitle );
 573                 else
 574                         $wgUser->removeWatch( $this->mTitle );
 575
 576                 $wgOut->setPagetitle( wfMsg( $add ? "addedwatch" : "removedwatch" ) );
 577                 $wgOut->setRobotpolicy( "noindex,follow" );
 578
 579                 $sk = $wgUser->getSkin() ;
 580                 $link = $sk->makeKnownLink ( $this->mTitle->getPrefixedText() ) ;
 581
 582                 if($add)
 583                         $text = wfMsg( "addedwatchtext", $link );
 584                 else
 585                         $text = wfMsg( "removedwatchtext", $link );
 586                 $wgOut->addHTML( $text );
 587
 588                 $up = new UserUpdate();
 589                 array_push( $wgDeferredUpdateList, $up );
 590
 591                 $wgOut->returnToMain( false );
 592         }
 593
 594         function unwatch()
 595         {
 596                 $this->watch( false );
 597         }
 598
 599         # This shares a lot of issues (and code) with Recent Changes
 600
 601         function history()
 602         {
 603                 global $wgUser, $wgOut, $wgLang, $offset, $limit;
 604
 605                 # If page hasn't changed, client can cache this
 606
 607                 if( $wgOut->checkLastModified( $this->getTimestamp() ) ){
 608                         # Client cache fresh and headers sent, nothing more to do.
 609                         return;
 610                 }
 611                 $fname = "Article::history";
 612                 wfProfileIn( $fname );
 613
 614                 $wgOut->setPageTitle( $this->mTitle->getPRefixedText() );
 615                 $wgOut->setSubtitle( wfMsg( "revhistory" ) );
 616                 $wgOut->setArticleFlag( false );
 617                 $wgOut->setRobotpolicy( "noindex,nofollow" );
 618
 619                 if( $this->mTitle->getArticleID() == 0 ) {
 620                         $wgOut->addHTML( wfMsg( "nohistory" ) );
 621                         wfProfileOut( $fname );
 622                         return;
 623                 }
 624
 625                 $offset = (int)$offset;
 626                 $limit = (int)$limit;
 627                 if( $limit == 0 ) $limit = 50;
 628                 $namespace = $this->mTitle->getNamespace();
 629                 $title = $this->mTitle->getText();
 630                 $sql = "SELECT old_id,old_user," .
 631                   "old_comment,old_user_text,old_timestamp,old_minor_edit ".
 632                   "FROM old USE INDEX (name_title_timestamp) " .
 633                   "WHERE old_namespace={$namespace} AND " .
 634                   "old_title='" . wfStrencode( $this->mTitle->getDBkey() ) . "' " .
 635                   "ORDER BY inverse_timestamp LIMIT $offset, $limit";
 636                 $res = wfQuery( $sql, DB_READ, "Article::history" );
 637
 638                 $revs = wfNumRows( $res );
 639                 if( $this->mTitle->getArticleID() == 0 ) {
 640                         $wgOut->addHTML( wfMsg( "nohistory" ) );
 641                         wfProfileOut( $fname );
 642                         return;
 643                 }
 644
 645                 $sk = $wgUser->getSkin();
 646                 $numbar = wfViewPrevNext(
 647                         $offset, $limit,
 648                         $this->mTitle->getPrefixedText(),
 649                         "action=history" );
 650                 $s = $numbar;
 651                 $s .= $sk->beginHistoryList();
 652
 653                 if($offset == 0 )
 654                 $s .= $sk->historyLine( $this->getTimestamp(), $this->getUser(),
 655                   $this->getUserText(), $namespace,
 656                   $title, 0, $this->getComment(),
 657                   ( $this->getMinorEdit() > 0 ) );
 658
 659                 $revs = wfNumRows( $res );
 660                 while ( $line = wfFetchObject( $res ) ) {
 661                         $s .= $sk->historyLine( $line->old_timestamp, $line->old_user,
 662                           $line->old_user_text, $namespace,
 663                           $title, $line->old_id,
 664                           $line->old_comment, ( $line->old_minor_edit > 0 ) );
 665                 }
 666                 $s .= $sk->endHistoryList();
 667                 $s .= $numbar;
 668                 $wgOut->addHTML( $s );
 669                 wfProfileOut( $fname );
 670         }
 671
 672         function protect( $limit = "sysop" )
 673         {
 674                 global $wgUser, $wgOut;
 675
 676                 if ( ! $wgUser->isSysop() ) {
 677                         $wgOut->sysopRequired();
 678                         return;
 679                 }
 680                 if ( wfReadOnly() ) {
 681                         $wgOut->readOnlyPage();
 682                         return;
 683                 }
 684                 $id = $this->mTitle->getArticleID();
 685                 if ( 0 == $id ) {
 686                         $wgOut->fatalEror( wfMsg( "badarticleerror" ) );
 687                         return;
 688                 }
 689         $sql = "UPDATE cur SET cur_touched='" . wfTimestampNow() . "'," .
 690                         "cur_restrictions='{$limit}' WHERE cur_id={$id}";
 691                 wfQuery( $sql, DB_WRITE, "Article::protect" );
 692
 693                 $log = new LogPage( wfMsg( "protectlogpage" ), wfMsg( "protectlogtext" ) );
 694                 if ( $limit === "" ) {
 695                         $log->addEntry( wfMsg( "unprotectedarticle", $this->mTitle->getPrefixedText() ), "" );
 696                 } else {
 697                         $log->addEntry( wfMsg( "protectedarticle", $this->mTitle->getPrefixedText() ), "" );
 698                 }
 699                 $wgOut->redirect( wfLocalUrl( $this->mTitle->getPrefixedURL() ) );
 700         }
 701
 702         function unprotect()
 703         {
 704                 return $this->protect( "" );
 705         }
 706
 707         function delete()
 708         {
 709                 global $wgUser, $wgOut, $wgMessageCache;
 710                 global $wpConfirm, $wpReason, $image, $oldimage;
 711
 712                 # This code desperately needs to be totally rewritten
 713
 714                 if ( ( ! $wgUser->isSysop() ) ) {
 715                         $wgOut->sysopRequired();
 716                         return;
 717                 }
 718                 if ( wfReadOnly() ) {
 719                         $wgOut->readOnlyPage();
 720                         return;
 721                 }
 722
 723                 # Can't delete cached MediaWiki namespace (i.e. vital messages)
 724                 if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI && $wgMessageCache->isCacheable( $this->mTitle->getDBkey() ) ) {
 725                         $wgOut->fatalError( wfMsg( "cannotdelete" ) );
 726                         return;
 727                 }
 728
 729                 # Better double-check that it hasn't been deleted yet!
 730                 $wgOut->setPagetitle( wfMsg( "confirmdelete" ) );
 731                 if ( ( "" == trim( $this->mTitle->getText() ) )
 732                   or ( $this->mTitle->getArticleId() == 0 ) ) {
 733                         $wgOut->fatalError( wfMsg( "cannotdelete" ) );
 734                         return;
 735                 }
 736
 737                 if ( $_POST["wpConfirm"] ) {
 738                         $this->doDelete();
 739                         return;
 740                 }
 741
 742                 # determine whether this page has earlier revisions
 743                 # and insert a warning if it does
 744                 # we select the text because it might be useful below
 745                 $ns = $this->mTitle->getNamespace();
 746                 $title = $this->mTitle->getDBkey();
 747                 $etitle = wfStrencode( $title );
 748                 $sql = "SELECT old_text FROM old WHERE old_namespace=$ns and old_title='$etitle' ORDER BY inverse_timestamp LIMIT 1";
 749                 $res = wfQuery( $sql, DB_READ, $fname );
 750                 if( ($old=wfFetchObject($res)) && !$wpConfirm ) {
 751                         $skin=$wgUser->getSkin();
 752                         $wgOut->addHTML("<B>".wfMsg("historywarning"));
 753                         $wgOut->addHTML( $skin->historyLink() ."</B><P>");
 754                 }
 755
 756                 $sql="SELECT cur_text FROM cur WHERE cur_namespace=$ns and cur_title='$etitle'";
 757                 $res=wfQuery($sql, DB_READ, $fname);
 758                 if( ($s=wfFetchObject($res))) {
 759
 760                         # if this is a mini-text, we can paste part of it into the deletion reason
 761
 762                         #if this is empty, an earlier revision may contain "useful" text
 763                         if($s->cur_text!="") {
 764                                 $text=$s->cur_text;
 765                         } else {
 766                                 if($old) {
 767                                         $text=$old->old_text;
 768                                         $blanked=1;
 769                                 }
 770
 771                         }
 772
 773                         $length=strlen($text);
 774
 775                         # this should not happen, since it is not possible to store an empty, new
 776                         # page. Let's insert a standard text in case it does, though
 777                         if($length==0 && !$wpReason) { $wpReason=wfmsg("exblank");}
 778
 779
 780                         if($length < 500 && !$wpReason) {
 781
 782                                 # comment field=255, let's grep the first 150 to have some user
 783                                 # space left
 784                                 $text=substr($text,0,150);
 785                                 # let's strip out newlines and HTML tags
 786                                 $text=preg_replace("/\"/","'",$text);
 787                                 $text=preg_replace("/\</","&lt;",$text);
 788                                 $text=preg_replace("/\>/","&gt;",$text);
 789                                 $text=preg_replace("/[\n\r]/","",$text);
 790                                 if(!$blanked) {
 791                                         $wpReason=wfMsg("excontent"). " '".$text;
 792                                 } else {
 793                                         $wpReason=wfMsg("exbeforeblank") . " '".$text;
 794                                 }
 795                                 if($length>150) { $wpReason .= "..."; } # we've only pasted part of the text
 796                                 $wpReason.="'";
 797                         }
 798                 }
 799
 800                 return $this->confirmDelete();
 801         }
 802
 803         function confirmDelete( $par = "" )
 804         {
 805                 global $wgOut;
 806                 global $wpReason;
 807
 808                 wfDebug( "Article::confirmDelete\n" );
 809
 810                 $sub = htmlspecialchars( $this->mTitle->getPrefixedText() );
 811                 $wgOut->setSubtitle( wfMsg( "deletesub", $sub ) );
 812                 $wgOut->setRobotpolicy( "noindex,nofollow" );
 813                 $wgOut->addWikiText( wfMsg( "confirmdeletetext" ) );
 814
 815                 $t = $this->mTitle->getPrefixedURL();
 816
 817                 $formaction = wfEscapeHTML( wfLocalUrl( $t, "action=delete" . $par ) );
 818                 $confirm = wfMsg( "confirm" );
 819                 $check = wfMsg( "confirmcheck" );
 820                 $delcom = wfMsg( "deletecomment" );
 821
 822                 $wgOut->addHTML( "
 823 <form id=\"deleteconfirm\" method=\"post\" action=\"{$formaction}\">
 824 <table border=0><tr><td align=right>
 825 {$delcom}:</td><td align=left>
 826 <input type=text size=60 name=\"wpReason\" value=\"" . htmlspecialchars( $wpReason ) . "\">
 827 </td></tr><tr><td>&nbsp;</td></tr>
 828 <tr><td align=right>
 829 <input type=checkbox name=\"wpConfirm\" value='1' id=\"wpConfirm\">
 830 </td><td><label for=\"wpConfirm\">{$check}</label></td>
 831 </tr><tr><td>&nbsp;</td><td>
 832 <input type=submit name=\"wpConfirmB\" value=\"{$confirm}\">
 833 </td></tr></table></form>\n" );
 834
 835                 $wgOut->returnToMain( false );
 836         }
 837
 838         function doDelete()
 839         {
 840                 global $wgOut, $wgUser, $wgLang;
 841                 global $wpReason;
 842                 $fname = "Article::doDelete";
 843                 wfDebug( "$fname\n" );
 844
 845                 $this->doDeleteArticle( $this->mTitle );
 846                 $deleted = $this->mTitle->getPrefixedText();
 847
 848                 $wgOut->setPagetitle( wfMsg( "actioncomplete" ) );
 849                 $wgOut->setRobotpolicy( "noindex,nofollow" );
 850
 851                 $sk = $wgUser->getSkin();
 852                 $loglink = $sk->makeKnownLink( $wgLang->getNsText(
 853                   Namespace::getWikipedia() ) .
 854                   ":" . wfMsg( "dellogpage" ), wfMsg( "deletionlog" ) );
 855
 856                 $text = wfMsg( "deletedtext", $deleted, $loglink );
 857
 858                 $wgOut->addHTML( "<p>" . $text );
 859                 $wgOut->returnToMain( false );
 860         }
 861
 862         function doDeleteArticle( $title )
 863         {
 864                 global $wgUser, $wgOut, $wgLang, $wpReason, $wgDeferredUpdateList,
 865                         $wgEnablePersistentLC;
 866
 867                 $fname = "Article::doDeleteArticle";
 868                 wfDebug( "$fname\n" );
 869
 870                 $ns = $title->getNamespace();
 871                 $t = wfStrencode( $title->getDBkey() );
 872                 $id = $title->getArticleID();
 873
 874                 if ( "" == $t ) {
 875                         $wgOut->fatalError( wfMsg( "cannotdelete" ) );
 876                         return;
 877                 }
 878
 879                 $u = new SiteStatsUpdate( 0, 1, -$this->isCountable( $this->getContent( true ) ) );
 880                 array_push( $wgDeferredUpdateList, $u );
 881
 882                 # Move article and history to the "archive" table
 883                 $sql = "INSERT INTO archive (ar_namespace,ar_title,ar_text," .
 884                   "ar_comment,ar_user,ar_user_text,ar_timestamp,ar_minor_edit," .
 885                   "ar_flags) SELECT cur_namespace,cur_title,cur_text,cur_comment," .
 886                   "cur_user,cur_user_text,cur_timestamp,cur_minor_edit,0 FROM cur " .
 887                   "WHERE cur_namespace={$ns} AND cur_title='{$t}'";
 888                 wfQuery( $sql, DB_WRITE, $fname );
 889
 890                 $sql = "INSERT INTO archive (ar_namespace,ar_title,ar_text," .
 891                   "ar_comment,ar_user,ar_user_text,ar_timestamp,ar_minor_edit," .
 892                   "ar_flags) SELECT old_namespace,old_title,old_text,old_comment," .
 893                   "old_user,old_user_text,old_timestamp,old_minor_edit,old_flags " .
 894                   "FROM old WHERE old_namespace={$ns} AND old_title='{$t}'";
 895                 wfQuery( $sql, DB_WRITE, $fname );
 896
 897                 # Now that it's safely backed up, delete it
 898
 899                 $sql = "DELETE FROM cur WHERE cur_namespace={$ns} AND " .
 900                   "cur_title='{$t}'";
 901                 wfQuery( $sql, DB_WRITE, $fname );
 902
 903                 $sql = "DELETE FROM old WHERE old_namespace={$ns} AND " .
 904                   "old_title='{$t}'";
 905                 wfQuery( $sql, DB_WRITE, $fname );
 906
 907                 $sql = "DELETE FROM recentchanges WHERE rc_namespace={$ns} AND " .
 908                   "rc_title='{$t}'";
 909                 wfQuery( $sql, DB_WRITE, $fname );
 910
 911                 # Finally, clean up the link tables
 912
 913                 if ( 0 != $id ) {
 914
 915                         $t = wfStrencode( $title->getPrefixedDBkey() );
 916
 917                         if ( $wgEnablePersistentLC ) {
 918                                 // Purge related entries in links cache on delete,
 919                                 wfQuery("DELETE linkscc FROM linkscc,links ".
 920                                         "WHERE lcc_title=links.l_from AND l_to={$id}", DB_WRITE);
 921                                 wfQuery("DELETE FROM linkscc WHERE lcc_title='{$t}'", DB_WRITE);
 922                         }
 923
 924                         $sql = "SELECT l_from FROM links WHERE l_to={$id}";
 925                         $res = wfQuery( $sql, DB_READ, $fname );
 926
 927                         $sql = "INSERT INTO brokenlinks (bl_from,bl_to) VALUES ";
 928                         $now = wfTimestampNow();
 929                         $sql2 = "UPDATE cur SET cur_touched='{$now}' WHERE cur_id IN (";
 930                         $first = true;
 931
 932                         while ( $s = wfFetchObject( $res ) ) {
 933                                 $nt = Title::newFromDBkey( $s->l_from );
 934                                 $lid = $nt->getArticleID();
 935
 936                                 if ( ! $first ) { $sql .= ","; $sql2 .= ","; }
 937                                 $first = false;
 938                                 $sql .= "({$lid},'{$t}')";
 939                                 $sql2 .= "{$lid}";
 940                         }
 941                         $sql2 .= ")";
 942                         if ( ! $first ) {
 943                                 wfQuery( $sql, DB_WRITE, $fname );
 944                                 wfQuery( $sql2, DB_WRITE, $fname );
 945                         }
 946                         wfFreeResult( $res );
 947
 948                         $sql = "DELETE FROM links WHERE l_to={$id}";
 949                         wfQuery( $sql, DB_WRITE, $fname );
 950
 951                         $sql = "DELETE FROM links WHERE l_from='{$t}'";
 952                         wfQuery( $sql, DB_WRITE, $fname );
 953
 954                         $sql = "DELETE FROM imagelinks WHERE il_from='{$t}'";
 955                         wfQuery( $sql, DB_WRITE, $fname );
 956
 957                         $sql = "DELETE FROM brokenlinks WHERE bl_from={$id}";
 958                         wfQuery( $sql, DB_WRITE, $fname );
 959                 }
 960
 961                 $log = new LogPage( wfMsg( "dellogpage" ), wfMsg( "dellogpagetext" ) );
 962                 $art = $title->getPrefixedText();
 963                 $wpReason = wfCleanQueryVar( $wpReason );
 964                 $log->addEntry( wfMsg( "deletedarticle", $art ), $wpReason );
 965
 966                 # Clear the cached article id so the interface doesn't act like we exist
 967                 $this->mTitle->resetArticleID( 0 );
 968                 $this->mTitle->mArticleID = 0;
 969         }
 970
 971         function rollback()
 972         {
 973                 global $wgUser, $wgLang, $wgOut, $from;
 974
 975                 if ( ! $wgUser->isSysop() ) {
 976                         $wgOut->sysopRequired();
 977                         return;
 978                 }
 979                 if ( wfReadOnly() ) {
 980                         $wgOut->readOnlyPage( $this->getContent() );
 981                         return;
 982                 }
 983
 984                 # Secret enhanced rollback, marks edits rc_bot=1
 985                 $bot = !!$_REQUEST['bot'];
 986
 987                 # Replace all this user's current edits with the next one down
 988                 $tt = wfStrencode( $this->mTitle->getDBKey() );
 989                 $n = $this->mTitle->getNamespace();
 990
 991                 # Get the last editor
 992                 $sql = "SELECT cur_id,cur_user,cur_user_text,cur_comment FROM cur WHERE cur_title='{$tt}' AND cur_namespace={$n}";
 993                 $res = wfQuery( $sql, DB_READ );
 994                 if( ($x = wfNumRows( $res )) != 1 ) {
 995                         # Something wrong
 996                         $wgOut->addHTML( wfMsg( "notanarticle" ) );
 997                         return;
 998                 }
 999                 $s = wfFetchObject( $res );
1000                 $ut = wfStrencode( $s->cur_user_text );
1001                 $uid = $s->cur_user;
1002                 $pid = $s->cur_id;
1003
1004                 $from = str_replace( '_', ' ', wfCleanQueryVar( $from ) );
1005                 if( $from != $s->cur_user_text ) {
1006                         $wgOut->setPageTitle(wfmsg("rollbackfailed"));
1007                         $wgOut->addWikiText( wfMsg( "alreadyrolled",
1008                                 htmlspecialchars( $this->mTitle->getPrefixedText()),
1009                                 htmlspecialchars( $from ),
1010                                 htmlspecialchars( $s->cur_user_text ) ) );
1011                         if($s->cur_comment != "") {
1012                                 $wgOut->addHTML(
1013                                         wfMsg("editcomment",
1014                                         htmlspecialchars( $s->cur_comment ) ) );
1015                                 }
1016                         return;
1017                 }
1018
1019                 # Get the last edit not by this guy
1020                 $sql = "SELECT old_text,old_user,old_user_text,old_timestamp
1021                 FROM old USE INDEX (name_title_timestamp)
1022                 WHERE old_namespace={$n} AND old_title='{$tt}'
1023                 AND (old_user <> {$uid} OR old_user_text <> '{$ut}')
1024                 ORDER BY inverse_timestamp LIMIT 1";
1025                 $res = wfQuery( $sql, DB_READ );
1026                 if( wfNumRows( $res ) != 1 ) {
1027                         # Something wrong
1028                         $wgOut->setPageTitle(wfMsg("rollbackfailed"));
1029                         $wgOut->addHTML( wfMsg( "cantrollback" ) );
1030                         return;
1031                 }
1032                 $s = wfFetchObject( $res );
1033
1034                 if ( $bot ) {
1035                         # Mark all reverted edits as bot
1036                         $sql = "UPDATE recentchanges SET rc_bot=1 WHERE
1037                                 rc_cur_id=$pid AND rc_user=$uid AND rc_timestamp > '{$s->old_timestamp}'";
1038                         wfQuery( $sql, DB_WRITE, $fname );
1039                 }
1040
1041                 # Save it!
1042                 $newcomment = wfMsg( "revertpage", $s->old_user_text );
1043                 $wgOut->setPagetitle( wfMsg( "actioncomplete" ) );
1044                 $wgOut->setRobotpolicy( "noindex,nofollow" );
1045                 $wgOut->addHTML( "<h2>" . $newcomment . "</h2>\n<hr>\n" );
1046                 $this->updateArticle( $s->old_text, $newcomment, 1, $this->mTitle->userIsWatching(), "", $bot );
1047
1048                 global $wgEnablePersistentLC;
1049                 if ( $wgEnablePersistentLC ) {
1050                         wfQuery("DELETE FROM linkscc WHERE lcc_pageid='{$pid}'", DB_WRITE);
1051                 }
1052
1053
1054                 $wgOut->returnToMain( false );
1055         }
1056
1057
1058         # Do standard deferred updates after page view
1059
1060         /* private */ function viewUpdates()
1061         {
1062                 global $wgDeferredUpdateList;
1063                 if ( 0 != $this->getID() ) {
1064                         global $wgDisableCounters;
1065                         if( !$wgDisableCounters ) {
1066                                 Article::incViewCount( $this->getID() );
1067                                 $u = new SiteStatsUpdate( 1, 0, 0 );
1068                                 array_push( $wgDeferredUpdateList, $u );
1069                         }
1070                         $u = new UserTalkUpdate( 0, $this->mTitle->getNamespace(),
1071                           $this->mTitle->getDBkey() );
1072                         array_push( $wgDeferredUpdateList, $u );
1073                 }
1074         }
1075
1076         # Do standard deferred updates after page edit.
1077         # Every 1000th edit, prune the recent changes table.
1078
1079         /* private */ function editUpdates( $text )
1080         {
1081                 global $wgDeferredUpdateList, $wgDBname, $wgMemc;
1082                 global $wgMessageCache;
1083
1084                 wfSeedRandom();
1085                 if ( 0 == mt_rand( 0, 999 ) ) {
1086                         $cutoff = wfUnix2Timestamp( time() - ( 7 * 86400 ) );
1087                         $sql = "DELETE FROM recentchanges WHERE rc_timestamp < '{$cutoff}'";
1088                         wfQuery( $sql, DB_WRITE );
1089                 }
1090                 $id = $this->getID();
1091                 $title = $this->mTitle->getPrefixedDBkey();
1092                 $shortTitle = $this->mTitle->getDBkey();
1093
1094                 $adj = $this->mCountAdjustment;
1095
1096                 if ( 0 != $id ) {
1097                         $u = new LinksUpdate( $id, $title );
1098                         array_push( $wgDeferredUpdateList, $u );
1099                         $u = new SiteStatsUpdate( 0, 1, $adj );
1100                         array_push( $wgDeferredUpdateList, $u );
1101                         $u = new SearchUpdate( $id, $title, $text );
1102                         array_push( $wgDeferredUpdateList, $u );
1103
1104                         $u = new UserTalkUpdate( 1, $this->mTitle->getNamespace(), $shortTitle );
1105                         array_push( $wgDeferredUpdateList, $u );
1106
1107                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
1108                                 $wgMessageCache->replace( $shortTitle, $text );
1109                         }
1110                 }
1111         }
1112
1113         /* private */ function setOldSubtitle()
1114         {
1115                 global $wgLang, $wgOut;
1116
1117                 $td = $wgLang->timeanddate( $this->mTimestamp, true );
1118                 $r = wfMsg( "revisionasof", $td );
1119                 $wgOut->setSubtitle( "({$r})" );
1120         }
1121
1122         # This function is called right before saving the wikitext,
1123         # so we can do things like signatures and links-in-context.
1124
1125         function preSaveTransform( $text )
1126         {
1127                 $s = "";
1128                 while ( "" != $text ) {
1129                         $p = preg_split( "/<\\s*nowiki\\s*>/i", $text, 2 );
1130                         $s .= $this->pstPass2( $p[0] );
1131
1132                         if ( ( count( $p ) < 2 ) || ( "" == $p[1] ) ) { $text = ""; }
1133                         else {
1134                                 $q = preg_split( "/<\\/\\s*nowiki\\s*>/i", $p[1], 2 );
1135                                 $s .= "<nowiki>{$q[0]}</nowiki>";
1136                                 $text = $q[1];
1137                         }
1138                 }
1139                 return rtrim( $s );
1140         }
1141
1142         /* private */ function pstPass2( $text )
1143         {
1144                 global $wgUser, $wgLang, $wgLocaltimezone;
1145
1146                 # Signatures
1147                 #
1148                 $n = $wgUser->getName();
1149                 $k = $wgUser->getOption( "nickname" );
1150                 if ( "" == $k ) { $k = $n; }
1151                 if(isset($wgLocaltimezone)) {
1152                         $oldtz = getenv("TZ"); putenv("TZ=$wgLocaltimezone");
1153                 }
1154                 /* Note: this is an ugly timezone hack for the European wikis */
1155                 $d = $wgLang->timeanddate( date( "YmdHis" ), false ) .
1156                   " (" . date( "T" ) . ")";
1157                 if(isset($wgLocaltimezone)) putenv("TZ=$oldtz");
1158
1159                 $text = preg_replace( "/~~~~/", "[[" . $wgLang->getNsText(
1160                   Namespace::getUser() ) . ":$n|$k]] $d", $text );
1161                 $text = preg_replace( "/~~~/", "[[" . $wgLang->getNsText(
1162                   Namespace::getUser() ) . ":$n|$k]]", $text );
1163
1164                 # Context links: [[|name]] and [[name (context)|]]
1165                 #
1166                 $tc = "[&;%\\-,.\\(\\)' _0-9A-Za-z\\/:\\x80-\\xff]";
1167                 $np = "[&;%\\-,.' _0-9A-Za-z\\/:\\x80-\\xff]"; # No parens
1168                 $namespacechar = '[ _0-9A-Za-z\x80-\xff]'; # Namespaces can use non-ascii!
1169                 $conpat = "/^({$np}+) \\(({$tc}+)\\)$/";
1170
1171                 $p1 = "/\[\[({$np}+) \\(({$np}+)\\)\\|]]/";             # [[page (context)|]]
1172                 $p2 = "/\[\[\\|({$tc}+)]]/";                                    # [[|page]]
1173                 $p3 = "/\[\[($namespacechar+):({$np}+)\\|]]/";          # [[namespace:page|]]
1174                 $p4 = "/\[\[($namespacechar+):({$np}+) \\(({$np}+)\\)\\|]]/";
1175                                                                                                                 # [[ns:page (cont)|]]
1176                 $context = "";
1177                 $t = $this->mTitle->getText();
1178                 if ( preg_match( $conpat, $t, $m ) ) {
1179                         $context = $m[2];
1180                 }
1181                 $text = preg_replace( $p4, "[[\\1:\\2 (\\3)|\\2]]", $text );
1182                 $text = preg_replace( $p1, "[[\\1 (\\2)|\\1]]", $text );
1183                 $text = preg_replace( $p3, "[[\\1:\\2|\\2]]", $text );
1184
1185                 if ( "" == $context ) {
1186                         $text = preg_replace( $p2, "[[\\1]]", $text );
1187                 } else {
1188                         $text = preg_replace( $p2, "[[\\1 ({$context})|\\1]]", $text );
1189                 }
1190
1191                 # {{SUBST:xxx}} variables
1192                 #
1193                 $mw =& MagicWord::get( MAG_SUBST );
1194                 $text = $mw->substituteCallback( $text, "wfReplaceSubstVar" );
1195
1196 /* Experimental:
1197                 # Trim trailing whitespace
1198                 # MAG_END (__END__) tag allows for trailing
1199                 # whitespace to be deliberately included
1200                 $text = rtrim( $text );
1201                 $mw =& MagicWord::get( MAG_END );
1202                 $mw->matchAndRemove( $text );
1203 */
1204                 return $text;
1205         }
1206
1207         /* Caching functions */
1208
1209         # checkLastModified returns true iff it has taken care of all
1210         # output to the client that is necessary for this request.
1211         # (that is, it has sent a cached version of the page)
1212         function tryFileCache() {
1213                 static $called = false;
1214                 if( $called ) {
1215                         wfDebug( " tryFileCache() -- called twice!?\n" );
1216                         return;
1217                 }
1218                 $called = true;
1219                 if($this->isFileCacheable()) {
1220                         $touched = $this->mTouched;
1221                         if( strpos( $this->mContent, "{{" ) !== false ) {
1222                                 # Expire pages with variable replacements in an hour
1223                                 $expire = wfUnix2Timestamp( time() - 3600 );
1224                                 $touched = max( $expire, $touched );
1225                         }
1226                         $cache = new CacheManager( $this->mTitle );
1227                         if($cache->isFileCacheGood( $touched )) {
1228                                 global $wgOut;
1229                                 wfDebug( " tryFileCache() - about to load\n" );
1230                                 $cache->loadFromFileCache();
1231                                 return true;
1232                         } else {
1233                                 wfDebug( " tryFileCache() - starting buffer\n" );
1234                                 if($cache->useGzip() && wfClientAcceptsGzip()) {
1235                                         /* For some reason, adding this header line over in
1236                                            CacheManager::saveToFileCache() fails on my test
1237                                            setup at home, though it works on the live install.
1238                                            Make double-sure...  --brion */
1239                                         header( "Content-Encoding: gzip" );
1240                                 }
1241                                 ob_start( array(&$cache, 'saveToFileCache' ) );
1242                         }
1243                 } else {
1244                         wfDebug( " tryFileCache() - not cacheable\n" );
1245                 }
1246         }
1247
1248         function isFileCacheable() {
1249                 global $wgUser, $wgUseFileCache, $wgShowIPinHeader;
1250                 global $action, $oldid, $diff, $redirect, $printable;
1251                 return $wgUseFileCache
1252                         and (!$wgShowIPinHeader)
1253                         and ($this->getID() != 0)
1254                         and ($wgUser->getId() == 0)
1255                         and (!$wgUser->getNewtalk())
1256                         and ($this->mTitle->getNamespace != Namespace::getSpecial())
1257                         and ($action == "view")
1258                         and (!isset($oldid))
1259                         and (!isset($diff))
1260                         and (!isset($redirect))
1261                         and (!isset($printable))
1262                         and (!$this->mRedirectedFrom);
1263         }
1264
1265         function checkTouched() {
1266                 $id = $this->getID();
1267                 $sql = "SELECT cur_touched,cur_is_redirect FROM cur WHERE cur_id=$id";
1268                 $res = wfQuery( $sql, DB_READ, "Article::checkTouched" );
1269                 if( $s = wfFetchObject( $res ) ) {
1270                         $this->mTouched = $s->cur_touched;
1271                         return !$s->cur_is_redirect;
1272                 } else {
1273                         return false;
1274                 }
1275         }
1276
1277         /* static */ function incViewCount( $id )
1278         {
1279                 $id = intval( $id );
1280
1281                 # Not important enough to warrant an error page in case of failure
1282                 $oldignore = wfIgnoreSQLErrors( true );
1283
1284                 wfQuery("INSERT INTO hitcounter (hc_id) VALUES ({$id})", DB_WRITE);
1285
1286                 if( (rand() % 23 != 0) or (wfLastErrno() != 0) ){
1287                         # Most of the time (or on SQL errors), skip row count check
1288                         wfIgnoreSQLErrors( $oldignore );
1289                         return;
1290                 }
1291
1292                 $res = wfQuery("SELECT COUNT(*) as n FROM hitcounter", DB_WRITE);
1293                 $row = wfFetchObject( $res );
1294                 $rown = intval( $row->n );
1295                 if( $rown > 1000 ){ // update counters after ~1000 hits
1296                         wfProfileIn( "Article::incViewCount-collect" );
1297                         $old_user_abort = ignore_user_abort( true );
1298
1299                         wfQuery("LOCK TABLES hitcounter WRITE", DB_WRITE);
1300                         wfQuery("CREATE TEMPORARY TABLE acchits TYPE=HEAP ".
1301                                 "SELECT hc_id,COUNT(*) AS hc_n FROM hitcounter ".
1302                                 "GROUP BY hc_id", DB_WRITE);
1303                         wfQuery("DELETE FROM hitcounter", DB_WRITE);
1304                         wfQuery("UNLOCK TABLES", DB_WRITE);
1305                         wfQuery("UPDATE cur,acchits SET cur_counter=cur_counter + hc_n ".
1306                                 "WHERE cur_id = hc_id", DB_WRITE);
1307                         wfQuery("DROP TABLE acchits", DB_WRITE);
1308
1309                         ignore_user_abort( $old_user_abort );
1310                         wfProfileOut( "Article::incViewCount-collect" );
1311                 }
1312                 wfIgnoreSQLErrors( $oldignore );
1313         }
1314 }
1315
1316 function wfReplaceSubstVar( $matches ) {
1317         return wfMsg( $matches[1] );
1318 }
1319
1320 ?>