includes/Article.php

   1 <?php
   2 # Class representing a Wikipedia article and history.
   3 # See design.doc for an overview.
   4
   5 # Note: edit user interface and cache support functions have been
   6 # moved to separate EditPage and CacheManager classes.
   7
   8 include_once( "CacheManager.php" );
   9
  10 class Article {
  11         /* private */ var $mContent, $mContentLoaded;
  12         /* private */ var $mUser, $mTimestamp, $mUserText;
  13         /* private */ var $mCounter, $mComment, $mCountAdjustment;
  14         /* private */ var $mMinorEdit, $mRedirectedFrom;
  15         /* private */ var $mTouched, $mFileCache, $mTitle;
  16         /* private */ var $mId, $mTable;
  17
  18         function Article( &$title ) {
  19                 $this->mTitle =& $title;
  20                 $this->clear();
  21         }
  22
  23         /* private */ function clear()
  24         {
  25                 $this->mContentLoaded = false;
  26                 $this->mCurID = $this->mUser = $this->mCounter = -1; # Not loaded
  27                 $this->mRedirectedFrom = $this->mUserText =
  28                 $this->mTimestamp = $this->mComment = $this->mFileCache = "";
  29                 $this->mCountAdjustment = 0;
  30                 $this->mTouched = "19700101000000";
  31         }
  32
  33         /* static */ function getRevisionText( $row, $prefix = "old_" ) {
  34                 # Deal with optional compression of archived pages.
  35                 # This can be done periodically via maintenance/compressOld.php, and
  36                 # as pages are saved if $wgCompressRevisions is set.
  37                 $text = $prefix . "text";
  38                 $flags = $prefix . "flags";
  39                 if( isset( $row->$flags ) && (false !== strpos( $row->$flags, "gzip" ) ) ) {
  40                         return gzinflate( $row->$text );
  41                 }
  42                 if( isset( $row->$text ) ) {
  43                         return $row->$text;
  44                 }
  45                 return false;
  46         }
  47
  48         /* static */ function compressRevisionText( &$text ) {
  49                 global $wgCompressRevisions;
  50                 if( !$wgCompressRevisions ) {
  51                         return "";
  52                 }
  53                 if( !function_exists( "gzdeflate" ) ) {
  54                         wfDebug( "Article::compressRevisionText() -- no zlib support, not compressing\n" );
  55                         return "";
  56                 }
  57                 $text = gzdeflate( $text );
  58                 return "gzip";
  59         }
  60
  61         # Note that getContent/loadContent may follow redirects if
  62         # not told otherwise, and so may cause a change to mTitle.
  63
  64         # Return the text of this revision
  65         function getContent( $noredir = false )
  66         {
  67                 global $action,$section,$count; # From query string
  68                 $fname =  "Article::getContent";
  69                 wfProfileIn( $fname );
  70
  71                 if ( 0 == $this->getID() ) {
  72                         if ( "edit" == $action ) {
  73                                 wfProfileOut( $fname );
  74                                 return ""; # was "newarticletext", now moved above the box)
  75                         }
  76                         wfProfileOut( $fname );
  77                         return wfMsg( "noarticletext" );
  78                 } else {
  79                         $this->loadContent( $noredir );
  80
  81                         if(
  82                                 # check if we're displaying a [[User talk:x.x.x.x]] anonymous talk page
  83                                 ( $this->mTitle->getNamespace() == Namespace::getTalk( Namespace::getUser()) ) &&
  84                                   preg_match("/^\d{1,3}\.\d{1,3}.\d{1,3}\.\d{1,3}$/",$this->mTitle->getText()) &&
  85                                   $action=="view"
  86                                 )
  87                                 {
  88                                 wfProfileOut( $fname );
  89                                 return $this->mContent . "\n" .wfMsg("anontalkpagetext"); }
  90                         else {
  91                                 if($action=="edit") {
  92                                         if($section!="") {
  93                                                 if($section=="new") {
  94                                                         wfProfileOut( $fname );
  95                                                         return "";
  96                                                 }
  97
  98                                                 $secs=preg_split("/(^=+.*?=+|^<h[1-6].*?>.*?<\/h[1-6].*?>)/mi",
  99                                                  $this->mContent, -1,
 100                                                  PREG_SPLIT_DELIM_CAPTURE);
 101                                                 if($section==0) {
 102                                                         wfProfileOut( $fname );
 103                                                         return trim($secs[0]);
 104                                                 } else {
 105                                                         wfProfileOut( $fname );
 106                                                         return trim($secs[$section*2-1] . $secs[$section*2]);
 107                                                 }
 108                                         }
 109                                 }
 110                                 wfProfileOut( $fname );
 111                                 return $this->mContent;
 112                         }
 113                 }
 114         }
 115
 116         # Load the revision (including cur_text) into this object
 117         function loadContent( $noredir = false )
 118         {
 119                 global $wgOut, $wgMwRedir;
 120                 global $oldid, $redirect; # From query
 121
 122                 if ( $this->mContentLoaded ) return;
 123                 $fname = "Article::loadContent";
 124                 $success = true;
 125
 126                 if ( ! $oldid ) {       # Retrieve current version
 127                         $id = $this->getID();
 128                         if ( 0 == $id ) return;
 129
 130                         $sql = "SELECT " .
 131                           "cur_text,cur_timestamp,cur_user,cur_counter,cur_restrictions,cur_touched " .
 132                           "FROM cur WHERE cur_id={$id}";
 133                         wfDebug( "$sql\n" );
 134                         $res = wfQuery( $sql, DB_READ, $fname );
 135                         if ( 0 == wfNumRows( $res ) ) {
 136                                 return;
 137                         }
 138
 139                         $s = wfFetchObject( $res );
 140                         # If we got a redirect, follow it (unless we've been told
 141                         # not to by either the function parameter or the query
 142                         if ( ( "no" != $redirect ) && ( false == $noredir ) &&
 143                           ( $wgMwRedir->matchStart( $s->cur_text ) ) ) {
 144                                 if ( preg_match( "/\\[\\[([^\\]\\|]+)[\\]\\|]/",
 145                                   $s->cur_text, $m ) ) {
 146                                         $rt = Title::newFromText( $m[1] );
 147                                         if( $rt ) {
 148                                                 # Gotta hand redirects to special pages differently:
 149                                                 # Fill the HTTP response "Location" header and ignore
 150                                                 # the rest of the page we're on.
 151
 152                                                 if ( $rt->getInterwiki() != "" ) {
 153                                                         $wgOut->redirect( $rt->getFullURL() ) ;
 154                                                         return;
 155                                                 }
 156                                                 if ( $rt->getNamespace() == Namespace::getSpecial() ) {
 157                                                         $wgOut->redirect( wfLocalUrl(
 158                                                           $rt->getPrefixedURL() ) );
 159                                                         return;
 160                                                 }
 161                                                 $rid = $rt->getArticleID();
 162                                                 if ( 0 != $rid ) {
 163                                                         $sql = "SELECT cur_text,cur_timestamp,cur_user," .
 164                                                           "cur_counter,cur_restrictions,cur_touched FROM cur WHERE cur_id={$rid}";
 165                                                         $res = wfQuery( $sql, DB_READ, $fname );
 166
 167                                                         if ( 0 != wfNumRows( $res ) ) {
 168                                                                 $this->mRedirectedFrom = $this->mTitle->getPrefixedText();
 169                                                                 $this->mTitle = $rt;
 170                                                                 $s = wfFetchObject( $res );
 171                                                         }
 172                                                 }
 173                                         }
 174                                 }
 175                         }
 176
 177                         $this->mContent = $s->cur_text;
 178                         $this->mUser = $s->cur_user;
 179                         $this->mCounter = $s->cur_counter;
 180                         $this->mTimestamp = $s->cur_timestamp;
 181                         $this->mTouched = $s->cur_touched;
 182                         $this->mTitle->mRestrictions = explode( ",", trim( $s->cur_restrictions ) );
 183                         $this->mTitle->mRestrictionsLoaded = true;
 184                         wfFreeResult( $res );
 185                 } else { # oldid set, retrieve historical version
 186                         $sql = "SELECT old_text,old_timestamp,old_user,old_flags FROM old " .
 187                           "WHERE old_id={$oldid}";
 188                         $res = wfQuery( $sql, DB_READ, $fname );
 189                         if ( 0 == wfNumRows( $res ) ) { return; }
 190
 191                         $s = wfFetchObject( $res );
 192                         $this->mContent = Article::getRevisionText( $s );
 193                         $this->mUser = $s->old_user;
 194                         $this->mCounter = 0;
 195                         $this->mTimestamp = $s->old_timestamp;
 196                         wfFreeResult( $res );
 197                 }
 198
 199                 # Return error message :P
 200                 # Horrible, confusing UI and data. I think this should return false on error -- TS
 201                 if ( !$success ) {
 202                         $t = $this->mTitle->getPrefixedText();
 203                         if ( isset( $oldid ) ) {
 204                                 $oldid = IntVal( $oldid );
 205                                 $t .= ",oldid={$oldid}";
 206                         }
 207                         if ( isset( $redirect ) ) {
 208                                 $redirect = ($redirect == "no") ? "no" : "yes";
 209                                 $t .= ",redirect={$redirect}";
 210                         }
 211                         $this->mContent = wfMsg( "missingarticle", $t );
 212                 }
 213
 214                 $this->mContentLoaded = true;
 215         }
 216
 217         function getID() {
 218                 if( $this->mTitle ) {
 219                         return $this->mTitle->getArticleID();
 220                 } else {
 221                         return 0;
 222                 }
 223         }
 224
 225         function getCount()
 226         {
 227                 if ( -1 == $this->mCounter ) {
 228                         $id = $this->getID();
 229                         $this->mCounter = wfGetSQL( "cur", "cur_counter", "cur_id={$id}" );
 230                 }
 231                 return $this->mCounter;
 232         }
 233
 234         # Would the given text make this article a "good" article (i.e.,
 235         # suitable for including in the article count)?
 236
 237         function isCountable( $text )
 238         {
 239                 global $wgUseCommaCount, $wgMwRedir;
 240
 241                 if ( 0 != $this->mTitle->getNamespace() ) { return 0; }
 242                 if ( $wgMwRedir->matchStart( $text ) ) { return 0; }
 243                 $token = ($wgUseCommaCount ? "," : "[[" );
 244                 if ( false === strstr( $text, $token ) ) { return 0; }
 245                 return 1;
 246         }
 247
 248         # Loads everything from cur except cur_text
 249         # This isn't necessary for all uses, so it's only done if needed.
 250
 251         /* private */ function loadLastEdit()
 252         {
 253                 global $wgOut;
 254                 if ( -1 != $this->mUser ) return;
 255
 256                 $sql = "SELECT cur_user,cur_user_text,cur_timestamp," .
 257                   "cur_comment,cur_minor_edit FROM cur WHERE " .
 258                   "cur_id=" . $this->getID();
 259                 $res = wfQuery( $sql, DB_READ, "Article::loadLastEdit" );
 260
 261                 if ( wfNumRows( $res ) > 0 ) {
 262                         $s = wfFetchObject( $res );
 263                         $this->mUser = $s->cur_user;
 264                         $this->mUserText = $s->cur_user_text;
 265                         $this->mTimestamp = $s->cur_timestamp;
 266                         $this->mComment = $s->cur_comment;
 267                         $this->mMinorEdit = $s->cur_minor_edit;
 268                 }
 269         }
 270
 271         function getTimestamp()
 272         {
 273                 $this->loadLastEdit();
 274                 return $this->mTimestamp;
 275         }
 276
 277         function getUser()
 278         {
 279                 $this->loadLastEdit();
 280                 return $this->mUser;
 281         }
 282
 283         function getUserText()
 284         {
 285                 $this->loadLastEdit();
 286                 return $this->mUserText;
 287         }
 288
 289         function getComment()
 290         {
 291                 $this->loadLastEdit();
 292                 return $this->mComment;
 293         }
 294
 295         function getMinorEdit()
 296         {
 297                 $this->loadLastEdit();
 298                 return $this->mMinorEdit;
 299         }
 300
 301         # This is the default action of the script: just view the page of
 302         # the given title.
 303
 304         function view()
 305         {
 306                 global $wgUser, $wgOut, $wgLang;
 307                 global $oldid, $diff; # From query
 308                 global $wgLinkCache, $IP;
 309                 $fname = "Article::view";
 310                 wfProfileIn( $fname );
 311
 312                 $wgOut->setArticleFlag( true );
 313                 $wgOut->setRobotpolicy( "index,follow" );
 314
 315                 # If we got diff and oldid in the query, we want to see a
 316                 # diff page instead of the article.
 317
 318                 if ( isset( $diff ) ) {
 319                         $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
 320                         $de = new DifferenceEngine( $oldid, $diff );
 321                         $de->showDiffPage();
 322                         wfProfileOut( $fname );
 323                         return;
 324                 }
 325
 326                 if ( !isset( $oldid ) and $this->checkTouched() ) {
 327                         if( $wgOut->checkLastModified( $this->mTouched ) ){
 328                                 return;
 329                         } else if ( $this->tryFileCache() ) {
 330                                 # tell wgOut that output is taken care of
 331                                 $wgOut->disable();
 332                                 $this->viewUpdates();
 333                                 return;
 334                         }
 335                 }
 336
 337                 $text = $this->getContent(); # May change mTitle
 338                 $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
 339                 $wgOut->setHTMLTitle( $this->mTitle->getPrefixedText() .
 340                   " - " . wfMsg( "wikititlesuffix" ) );
 341
 342                 # We're looking at an old revision
 343
 344                 if ( $oldid ) {
 345                         $this->setOldSubtitle();
 346                         $wgOut->setRobotpolicy( "noindex,follow" );
 347                 }
 348                 if ( "" != $this->mRedirectedFrom ) {
 349                         $sk = $wgUser->getSkin();
 350                         $redir = $sk->makeKnownLink( $this->mRedirectedFrom, "",
 351                           "redirect=no" );
 352                         $s = wfMsg( "redirectedfrom", $redir );
 353                         $wgOut->setSubtitle( $s );
 354                 }
 355
 356                 $wgLinkCache->preFill( $this->mTitle );
 357                 $wgOut->addWikiText( $text, true, $this );
 358
 359                 $this->viewUpdates();
 360                 wfProfileOut( $fname );
 361         }
 362
 363         # Theoretically we could defer these whole insert and update
 364         # functions for after display, but that's taking a big leap
 365         # of faith, and we want to be able to report database
 366         # errors at some point.
 367
 368         /* private */ function insertNewArticle( $text, $summary, $isminor, $watchthis )
 369         {
 370                 global $wgOut, $wgUser, $wgLinkCache, $wgMwRedir;
 371                 global $wgUseSquid, $wgDeferredUpdateList, $wgInternalServer;
 372
 373                 $fname = "Article::insertNewArticle";
 374
 375                 $this->mCountAdjustment = $this->isCountable( $text );
 376
 377                 $ns = $this->mTitle->getNamespace();
 378                 $ttl = $this->mTitle->getDBkey();
 379                 $text = $this->preSaveTransform( $text );
 380                 if ( $wgMwRedir->matchStart( $text ) ) { $redir = 1; }
 381                 else { $redir = 0; }
 382
 383                 $now = wfTimestampNow();
 384                 $won = wfInvertTimestamp( $now );
 385                 wfSeedRandom();
 386                 $rand = number_format( mt_rand() / mt_getrandmax(), 12, ".", "" );
 387                 $isminor = ( $isminor && $wgUser->getID() ) ? 1 : 0;
 388                 $sql = "INSERT INTO cur (cur_namespace,cur_title,cur_text," .
 389                   "cur_comment,cur_user,cur_timestamp,cur_minor_edit,cur_counter," .
 390                   "cur_restrictions,cur_user_text,cur_is_redirect," .
 391                   "cur_is_new,cur_random,cur_touched,inverse_timestamp) VALUES ({$ns},'" . wfStrencode( $ttl ) . "', '" .
 392                   wfStrencode( $text ) . "', '" .
 393                   wfStrencode( $summary ) . "', '" .
 394                   $wgUser->getID() . "', '{$now}', " .
 395                   $isminor . ", 0, '', '" .
 396                   wfStrencode( $wgUser->getName() ) . "', $redir, 1, $rand, '{$now}', '{$won}')";
 397                 $res = wfQuery( $sql, DB_WRITE, $fname );
 398
 399                 $newid = wfInsertId();
 400                 $this->mTitle->resetArticleID( $newid );
 401
 402                 Article::onArticleCreate( $this->mTitle );
 403                 RecentChange::notifyNew( $now, $this->mTitle, $isminor, $wgUser, $summary );
 404
 405                 if ($watchthis) {
 406                         if(!$this->mTitle->userIsWatching()) $this->watch();
 407                 } else {
 408                         if ( $this->mTitle->userIsWatching() ) {
 409                                 $this->unwatch();
 410                         }
 411                 }
 412
 413                 # The talk page isn't in the regular link tables, so we need to update manually:
 414                 $talkns = $ns ^ 1; # talk -> normal; normal -> talk
 415                 $sql = "UPDATE cur set cur_touched='$now' WHERE cur_namespace=$talkns AND cur_title='" . wfStrencode( $ttl ) . "'";
 416                 wfQuery( $sql, DB_WRITE );
 417
 418                 # standard deferred updates
 419                 $this->editUpdates( $text );
 420
 421                 # Squid purging
 422                 if ( $wgUseSquid ) {
 423                         $urlArr = Array(
 424                                 $wgInternalServer.wfLocalUrl( $this->mTitle->getPrefixedURL())
 425                         );
 426                         wfPurgeSquidServers($urlArr);
 427                         /* this needs to be done after LinksUpdate */
 428                         $u = new SquidUpdate($this->mTitle);
 429                         array_push( $wgDeferredUpdateList, $u );
 430                 }
 431
 432                 $this->showArticle( $text, wfMsg( "newarticle" ) );
 433         }
 434
 435         function updateArticle( $text, $summary, $minor, $watchthis, $section = "", $forceBot = false )
 436         {
 437                 global $wgOut, $wgUser, $wgLinkCache;
 438                 global $wgDBtransactions, $wgMwRedir;
 439                 global $wgUseSquid, $wgInternalServer;
 440                 $fname = "Article::updateArticle";
 441
 442                 $this->loadLastEdit();
 443
 444                 // insert updated section into old text if we have only edited part
 445                 // of the article
 446                 if ($section != "") {
 447                         $oldtext=$this->getContent();
 448                         if($section=="new") {
 449                                 if($summary) $subject="== {$summary} ==\n\n";
 450                                 $text=$oldtext."\n\n".$subject.$text;
 451                         } else {
 452                                 $secs=preg_split("/(^=+.*?=+|^<h[1-6].*?>.*?<\/h[1-6].*?>)/mi",
 453                                   $oldtext,-1,PREG_SPLIT_DELIM_CAPTURE);
 454                                 $secs[$section*2]=$text."\n\n"; // replace with edited
 455                                 if($section) { $secs[$section*2-1]=""; } // erase old headline
 456                                 $text=join("",$secs);
 457                         }
 458                 }
 459                 if ( $this->mMinorEdit ) { $me1 = 1; } else { $me1 = 0; }
 460                 if ( $minor && $wgUser->getID() ) { $me2 = 1; } else { $me2 = 0; }
 461                 if ( preg_match( "/^((" . $wgMwRedir->getBaseRegex() . ")[^\\n]+)/i", $text, $m ) ) {
 462                         $redir = 1;
 463                         $text = $m[1] . "\n"; # Remove all content but redirect
 464                 }
 465                 else { $redir = 0; }
 466
 467                 $text = $this->preSaveTransform( $text );
 468
 469                 # Update article, but only if changed.
 470
 471                 if( $wgDBtransactions ) {
 472                         $sql = "BEGIN";
 473                         wfQuery( $sql, DB_WRITE );
 474                 }
 475                 $oldtext = $this->getContent( true );
 476
 477                 if ( 0 != strcmp( $text, $oldtext ) ) {
 478                         $this->mCountAdjustment = $this->isCountable( $text )
 479                           - $this->isCountable( $oldtext );
 480
 481                         $now = wfTimestampNow();
 482                         $won = wfInvertTimestamp( $now );
 483                         $sql = "UPDATE cur SET cur_text='" . wfStrencode( $text ) .
 484                           "',cur_comment='" .  wfStrencode( $summary ) .
 485                           "',cur_minor_edit={$me2}, cur_user=" . $wgUser->getID() .
 486                           ",cur_timestamp='{$now}',cur_user_text='" .
 487                           wfStrencode( $wgUser->getName() ) .
 488                           "',cur_is_redirect={$redir}, cur_is_new=0, cur_touched='{$now}', inverse_timestamp='{$won}' " .
 489                           "WHERE cur_id=" . $this->getID() .
 490                           " AND cur_timestamp='" . $this->getTimestamp() . "'";
 491                         $res = wfQuery( $sql, DB_WRITE, $fname );
 492
 493                         if( wfAffectedRows() == 0 ) {
 494                                 /* Belated edit conflict! Run away!! */
 495                                 return false;
 496                         }
 497
 498                         # This overwrites $oldtext if revision compression is on
 499                         $flags = Article::compressRevisionText( $oldtext );
 500
 501                         $sql = "INSERT INTO old (old_namespace,old_title,old_text," .
 502                           "old_comment,old_user,old_user_text,old_timestamp," .
 503                           "old_minor_edit,inverse_timestamp,old_flags) VALUES (" .
 504                           $this->mTitle->getNamespace() . ", '" .
 505                           wfStrencode( $this->mTitle->getDBkey() ) . "', '" .
 506                           wfStrencode( $oldtext ) . "', '" .
 507                           wfStrencode( $this->getComment() ) . "', " .
 508                           $this->getUser() . ", '" .
 509                           wfStrencode( $this->getUserText() ) . "', '" .
 510                           $this->getTimestamp() . "', " . $me1 . ", '" .
 511                           wfInvertTimestamp( $this->getTimestamp() ) . "','$flags')";
 512                         $res = wfQuery( $sql, DB_WRITE, $fname );
 513                         $oldid = wfInsertID( $res );
 514
 515                         $bot = (int)($wgUser->isBot() || $forceBot);
 516                         RecentChange::notifyEdit( $now, $this->mTitle, $me2, $wgUser, $summary,
 517                                 $oldid, $this->getTimestamp(), $bot );
 518                         Article::onArticleEdit( $this->mTitle );
 519                 }
 520
 521                 if( $wgDBtransactions ) {
 522                         $sql = "COMMIT";
 523                         wfQuery( $sql, DB_WRITE );
 524                 }
 525
 526                 if ($watchthis) {
 527                         if (!$this->mTitle->userIsWatching()) $this->watch();
 528                 } else {
 529                         if ( $this->mTitle->userIsWatching() ) {
 530                                 $this->unwatch();
 531                         }
 532                 }
 533                 # standard deferred updates
 534                 $this->editUpdates( $text );
 535
 536                 # Squid updates
 537
 538                 if ( $wgUseSquid ) {
 539                         $urlArr = Array(
 540                                 $wgInternalServer.wfLocalUrl( $this->mTitle->getPrefixedURL())
 541                         );
 542                         wfPurgeSquidServers($urlArr);
 543                 }
 544
 545                 $this->showArticle( $text, wfMsg( "updated" ) );
 546                 return true;
 547         }
 548
 549         # After we've either updated or inserted the article, update
 550         # the link tables and redirect to the new page.
 551
 552         function showArticle( $text, $subtitle )
 553         {
 554                 global $wgOut, $wgUser, $wgLinkCache;
 555                 global $wgMwRedir;
 556
 557                 $wgLinkCache = new LinkCache();
 558
 559                 # Get old version of link table to allow incremental link updates
 560                 $wgLinkCache->preFill( $this->mTitle );
 561                 $wgLinkCache->clear();
 562
 563                 # Now update the link cache by parsing the text
 564                 $wgOut = new OutputPage();
 565                 $wgOut->addWikiText( $text, true, $this );
 566
 567                 if( $wgMwRedir->matchStart( $text ) )
 568                         $r = "redirect=no";
 569                 else
 570                         $r = "";
 571                 $wgOut->redirect( wfLocalUrl( $this->mTitle->getPrefixedURL(), $r ) );
 572         }
 573
 574         # Add this page to my watchlist
 575
 576         function watch( $add = true )
 577         {
 578                 global $wgUser, $wgOut, $wgLang;
 579                 global $wgDeferredUpdateList;
 580
 581                 if ( 0 == $wgUser->getID() ) {
 582                         $wgOut->errorpage( "watchnologin", "watchnologintext" );
 583                         return;
 584                 }
 585                 if ( wfReadOnly() ) {
 586                         $wgOut->readOnlyPage();
 587                         return;
 588                 }
 589                 if( $add )
 590                         $wgUser->addWatch( $this->mTitle );
 591                 else
 592                         $wgUser->removeWatch( $this->mTitle );
 593
 594                 $wgOut->setPagetitle( wfMsg( $add ? "addedwatch" : "removedwatch" ) );
 595                 $wgOut->setRobotpolicy( "noindex,follow" );
 596
 597                 $sk = $wgUser->getSkin() ;
 598                 $link = $sk->makeKnownLink ( $this->mTitle->getPrefixedText() ) ;
 599
 600                 if($add)
 601                         $text = wfMsg( "addedwatchtext", $link );
 602                 else
 603                         $text = wfMsg( "removedwatchtext", $link );
 604                 $wgOut->addHTML( $text );
 605
 606                 $up = new UserUpdate();
 607                 array_push( $wgDeferredUpdateList, $up );
 608
 609                 $wgOut->returnToMain( false );
 610         }
 611
 612         function unwatch()
 613         {
 614                 $this->watch( false );
 615         }
 616
 617         function protect( $limit = "sysop" )
 618         {
 619                 global $wgUser, $wgOut;
 620
 621                 if ( ! $wgUser->isSysop() ) {
 622                         $wgOut->sysopRequired();
 623                         return;
 624                 }
 625                 if ( wfReadOnly() ) {
 626                         $wgOut->readOnlyPage();
 627                         return;
 628                 }
 629                 $id = $this->mTitle->getArticleID();
 630                 if ( 0 == $id ) {
 631                         $wgOut->fatalEror( wfMsg( "badarticleerror" ) );
 632                         return;
 633                 }
 634         $sql = "UPDATE cur SET cur_touched='" . wfTimestampNow() . "'," .
 635                         "cur_restrictions='{$limit}' WHERE cur_id={$id}";
 636                 wfQuery( $sql, DB_WRITE, "Article::protect" );
 637
 638                 $log = new LogPage( wfMsg( "protectlogpage" ), wfMsg( "protectlogtext" ) );
 639                 if ( $limit === "" ) {
 640                         $log->addEntry( wfMsg( "unprotectedarticle", $this->mTitle->getPrefixedText() ), "" );
 641                 } else {
 642                         $log->addEntry( wfMsg( "protectedarticle", $this->mTitle->getPrefixedText() ), "" );
 643                 }
 644                 $wgOut->redirect( wfLocalUrl( $this->mTitle->getPrefixedURL() ) );
 645         }
 646
 647         function unprotect()
 648         {
 649                 return $this->protect( "" );
 650         }
 651
 652         function delete()
 653         {
 654                 global $wgUser, $wgOut, $wgMessageCache;
 655                 global $wpConfirm, $wpReason, $image, $oldimage;
 656
 657                 # This code desperately needs to be totally rewritten
 658
 659                 if ( ( ! $wgUser->isSysop() ) ) {
 660                         $wgOut->sysopRequired();
 661                         return;
 662                 }
 663                 if ( wfReadOnly() ) {
 664                         $wgOut->readOnlyPage();
 665                         return;
 666                 }
 667
 668                 # Can't delete cached MediaWiki namespace (i.e. vital messages)
 669                 if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI && $wgMessageCache->isCacheable( $this->mTitle->getDBkey() ) ) {
 670                         $wgOut->fatalError( wfMsg( "cannotdelete" ) );
 671                         return;
 672                 }
 673
 674                 # Better double-check that it hasn't been deleted yet!
 675                 $wgOut->setPagetitle( wfMsg( "confirmdelete" ) );
 676                 if ( ( "" == trim( $this->mTitle->getText() ) )
 677                   or ( $this->mTitle->getArticleId() == 0 ) ) {
 678                         $wgOut->fatalError( wfMsg( "cannotdelete" ) );
 679                         return;
 680                 }
 681
 682                 if ( $_POST["wpConfirm"] ) {
 683                         $this->doDelete();
 684                         return;
 685                 }
 686
 687                 # determine whether this page has earlier revisions
 688                 # and insert a warning if it does
 689                 # we select the text because it might be useful below
 690                 $ns = $this->mTitle->getNamespace();
 691                 $title = $this->mTitle->getDBkey();
 692                 $etitle = wfStrencode( $title );
 693                 $sql = "SELECT old_text,old_flags FROM old WHERE old_namespace=$ns and old_title='$etitle' ORDER BY inverse_timestamp LIMIT 1";
 694                 $res = wfQuery( $sql, DB_READ, $fname );
 695                 if( ($old=wfFetchObject($res)) && !$wpConfirm ) {
 696                         $skin=$wgUser->getSkin();
 697                         $wgOut->addHTML("<B>".wfMsg("historywarning"));
 698                         $wgOut->addHTML( $skin->historyLink() ."</B><P>");
 699                 }
 700
 701                 $sql="SELECT cur_text FROM cur WHERE cur_namespace=$ns and cur_title='$etitle'";
 702                 $res=wfQuery($sql, DB_READ, $fname);
 703                 if( ($s=wfFetchObject($res))) {
 704
 705                         # if this is a mini-text, we can paste part of it into the deletion reason
 706
 707                         #if this is empty, an earlier revision may contain "useful" text
 708                         if($s->cur_text!="") {
 709                                 $text=$s->cur_text;
 710                         } else {
 711                                 if($old) {
 712                                         $text = Article::getRevisionText( $old );
 713                                         $blanked=1;
 714                                 }
 715
 716                         }
 717
 718                         $length=strlen($text);
 719
 720                         # this should not happen, since it is not possible to store an empty, new
 721                         # page. Let's insert a standard text in case it does, though
 722                         if($length==0 && !$wpReason) { $wpReason=wfmsg("exblank");}
 723
 724
 725                         if($length < 500 && !$wpReason) {
 726
 727                                 # comment field=255, let's grep the first 150 to have some user
 728                                 # space left
 729                                 $text=substr($text,0,150);
 730                                 # let's strip out newlines and HTML tags
 731                                 $text=preg_replace("/\"/","'",$text);
 732                                 $text=preg_replace("/\</","&lt;",$text);
 733                                 $text=preg_replace("/\>/","&gt;",$text);
 734                                 $text=preg_replace("/[\n\r]/","",$text);
 735                                 if(!$blanked) {
 736                                         $wpReason=wfMsg("excontent"). " '".$text;
 737                                 } else {
 738                                         $wpReason=wfMsg("exbeforeblank") . " '".$text;
 739                                 }
 740                                 if($length>150) { $wpReason .= "..."; } # we've only pasted part of the text
 741                                 $wpReason.="'";
 742                         }
 743                 }
 744
 745                 return $this->confirmDelete();
 746         }
 747
 748         function confirmDelete( $par = "" )
 749         {
 750                 global $wgOut;
 751                 global $wpReason;
 752
 753                 wfDebug( "Article::confirmDelete\n" );
 754
 755                 $sub = htmlspecialchars( $this->mTitle->getPrefixedText() );
 756                 $wgOut->setSubtitle( wfMsg( "deletesub", $sub ) );
 757                 $wgOut->setRobotpolicy( "noindex,nofollow" );
 758                 $wgOut->addWikiText( wfMsg( "confirmdeletetext" ) );
 759
 760                 $t = $this->mTitle->getPrefixedURL();
 761
 762                 $formaction = wfEscapeHTML( wfLocalUrl( $t, "action=delete" . $par ) );
 763                 $confirm = wfMsg( "confirm" );
 764                 $check = wfMsg( "confirmcheck" );
 765                 $delcom = wfMsg( "deletecomment" );
 766
 767                 $wgOut->addHTML( "
 768 <form id=\"deleteconfirm\" method=\"post\" action=\"{$formaction}\">
 769 <table border=0><tr><td align=right>
 770 {$delcom}:</td><td align=left>
 771 <input type=text size=60 name=\"wpReason\" value=\"" . htmlspecialchars( $wpReason ) . "\">
 772 </td></tr><tr><td>&nbsp;</td></tr>
 773 <tr><td align=right>
 774 <input type=checkbox name=\"wpConfirm\" value='1' id=\"wpConfirm\">
 775 </td><td><label for=\"wpConfirm\">{$check}</label></td>
 776 </tr><tr><td>&nbsp;</td><td>
 777 <input type=submit name=\"wpConfirmB\" value=\"{$confirm}\">
 778 </td></tr></table></form>\n" );
 779
 780                 $wgOut->returnToMain( false );
 781         }
 782
 783         function doDelete()
 784         {
 785                 global $wgOut, $wgUser, $wgLang;
 786                 global $wpReason;
 787                 $fname = "Article::doDelete";
 788                 wfDebug( "$fname\n" );
 789
 790                 $this->doDeleteArticle( $this->mTitle );
 791                 $deleted = $this->mTitle->getPrefixedText();
 792
 793                 $wgOut->setPagetitle( wfMsg( "actioncomplete" ) );
 794                 $wgOut->setRobotpolicy( "noindex,nofollow" );
 795
 796                 $sk = $wgUser->getSkin();
 797                 $loglink = $sk->makeKnownLink( $wgLang->getNsText(
 798                   Namespace::getWikipedia() ) .
 799                   ":" . wfMsg( "dellogpage" ), wfMsg( "deletionlog" ) );
 800
 801                 $text = wfMsg( "deletedtext", $deleted, $loglink );
 802
 803                 $wgOut->addHTML( "<p>" . $text );
 804                 $wgOut->returnToMain( false );
 805         }
 806
 807         function doDeleteArticle( $title )
 808         {
 809                 global $wgUser, $wgOut, $wgLang, $wpReason;
 810                 global  $wgUseSquid, $wgDeferredUpdateList, $wgInternalServer;
 811
 812                 $fname = "Article::doDeleteArticle";
 813                 wfDebug( "$fname\n" );
 814
 815                 $ns = $title->getNamespace();
 816                 $t = wfStrencode( $title->getDBkey() );
 817                 $id = $title->getArticleID();
 818
 819                 if ( "" == $t ) {
 820                         $wgOut->fatalError( wfMsg( "cannotdelete" ) );
 821                         return;
 822                 }
 823
 824                 $u = new SiteStatsUpdate( 0, 1, -$this->isCountable( $this->getContent( true ) ) );
 825                 array_push( $wgDeferredUpdateList, $u );
 826
 827                 # Squid purging
 828                 if ( $wgUseSquid ) {
 829                         $urlArr = Array(
 830                                 $wgInternalServer.wfLocalUrl( $this->mTitle->getPrefixedURL())
 831                         );
 832                         wfPurgeSquidServers($urlArr);
 833
 834                         /* prepare the list of urls to purge */
 835                         $sql = "SELECT l_from FROM links WHERE l_to={$id}" ;
 836                         $res = wfQuery ( $sql, DB_READ ) ;
 837                         while ( $BL = wfFetchObject ( $res ) )
 838                         {
 839                                 $tobj = Title::newFromDBkey( $BL->l_from) ;
 840                                 $blurlArr[] = $wgInternalServer.wfLocalUrl( $tobj->getPrefixedURL() );
 841                         }
 842                         wfFreeResult ( $res ) ;
 843                         $u = new SquidUpdate( $this->mTitle, $blurlArr );
 844                         array_push( $wgDeferredUpdateList, $u );
 845
 846                 }
 847
 848
 849
 850                 # Move article and history to the "archive" table
 851                 $sql = "INSERT INTO archive (ar_namespace,ar_title,ar_text," .
 852                   "ar_comment,ar_user,ar_user_text,ar_timestamp,ar_minor_edit," .
 853                   "ar_flags) SELECT cur_namespace,cur_title,cur_text,cur_comment," .
 854                   "cur_user,cur_user_text,cur_timestamp,cur_minor_edit,0 FROM cur " .
 855                   "WHERE cur_namespace={$ns} AND cur_title='{$t}'";
 856                 wfQuery( $sql, DB_WRITE, $fname );
 857
 858                 $sql = "INSERT INTO archive (ar_namespace,ar_title,ar_text," .
 859                   "ar_comment,ar_user,ar_user_text,ar_timestamp,ar_minor_edit," .
 860                   "ar_flags) SELECT old_namespace,old_title,old_text,old_comment," .
 861                   "old_user,old_user_text,old_timestamp,old_minor_edit,old_flags " .
 862                   "FROM old WHERE old_namespace={$ns} AND old_title='{$t}'";
 863                 wfQuery( $sql, DB_WRITE, $fname );
 864
 865                 # Now that it's safely backed up, delete it
 866
 867                 $sql = "DELETE FROM cur WHERE cur_namespace={$ns} AND " .
 868                   "cur_title='{$t}'";
 869                 wfQuery( $sql, DB_WRITE, $fname );
 870
 871                 $sql = "DELETE FROM old WHERE old_namespace={$ns} AND " .
 872                   "old_title='{$t}'";
 873                 wfQuery( $sql, DB_WRITE, $fname );
 874
 875                 $sql = "DELETE FROM recentchanges WHERE rc_namespace={$ns} AND " .
 876                   "rc_title='{$t}'";
 877                 wfQuery( $sql, DB_WRITE, $fname );
 878
 879                 # Finally, clean up the link tables
 880
 881                 if ( 0 != $id ) {
 882
 883                         $t = wfStrencode( $title->getPrefixedDBkey() );
 884
 885                         Article::onArticleDelete( $title );
 886
 887                         $sql = "SELECT l_from FROM links WHERE l_to={$id}";
 888                         $res = wfQuery( $sql, DB_READ, $fname );
 889
 890                         $sql = "INSERT INTO brokenlinks (bl_from,bl_to) VALUES ";
 891                         $now = wfTimestampNow();
 892                         $sql2 = "UPDATE cur SET cur_touched='{$now}' WHERE cur_id IN (";
 893                         $first = true;
 894
 895                         while ( $s = wfFetchObject( $res ) ) {
 896                                 $nt = Title::newFromDBkey( $s->l_from );
 897                                 $lid = $nt->getArticleID();
 898
 899                                 if ( ! $first ) { $sql .= ","; $sql2 .= ","; }
 900                                 $first = false;
 901                                 $sql .= "({$lid},'{$t}')";
 902                                 $sql2 .= "{$lid}";
 903                         }
 904                         $sql2 .= ")";
 905                         if ( ! $first ) {
 906                                 wfQuery( $sql, DB_WRITE, $fname );
 907                                 wfQuery( $sql2, DB_WRITE, $fname );
 908                         }
 909                         wfFreeResult( $res );
 910
 911                         $sql = "DELETE FROM links WHERE l_to={$id}";
 912                         wfQuery( $sql, DB_WRITE, $fname );
 913
 914                         $sql = "DELETE FROM links WHERE l_from='{$t}'";
 915                         wfQuery( $sql, DB_WRITE, $fname );
 916
 917                         $sql = "DELETE FROM imagelinks WHERE il_from='{$t}'";
 918                         wfQuery( $sql, DB_WRITE, $fname );
 919
 920                         $sql = "DELETE FROM brokenlinks WHERE bl_from={$id}";
 921                         wfQuery( $sql, DB_WRITE, $fname );
 922                 }
 923
 924                 $log = new LogPage( wfMsg( "dellogpage" ), wfMsg( "dellogpagetext" ) );
 925                 $art = $title->getPrefixedText();
 926                 $wpReason = wfCleanQueryVar( $wpReason );
 927                 $log->addEntry( wfMsg( "deletedarticle", $art ), $wpReason );
 928
 929                 # Clear the cached article id so the interface doesn't act like we exist
 930                 $this->mTitle->resetArticleID( 0 );
 931                 $this->mTitle->mArticleID = 0;
 932         }
 933
 934         function rollback()
 935         {
 936                 global $wgUser, $wgLang, $wgOut, $from;
 937
 938                 if ( ! $wgUser->isSysop() ) {
 939                         $wgOut->sysopRequired();
 940                         return;
 941                 }
 942                 if ( wfReadOnly() ) {
 943                         $wgOut->readOnlyPage( $this->getContent() );
 944                         return;
 945                 }
 946
 947                 # Enhanced rollback, marks edits rc_bot=1
 948                 $bot = !!$_REQUEST['bot'];
 949
 950                 # Replace all this user's current edits with the next one down
 951                 $tt = wfStrencode( $this->mTitle->getDBKey() );
 952                 $n = $this->mTitle->getNamespace();
 953
 954                 # Get the last editor
 955                 $sql = "SELECT cur_id,cur_user,cur_user_text,cur_comment FROM cur WHERE cur_title='{$tt}' AND cur_namespace={$n}";
 956                 $res = wfQuery( $sql, DB_READ );
 957                 if( ($x = wfNumRows( $res )) != 1 ) {
 958                         # Something wrong
 959                         $wgOut->addHTML( wfMsg( "notanarticle" ) );
 960                         return;
 961                 }
 962                 $s = wfFetchObject( $res );
 963                 $ut = wfStrencode( $s->cur_user_text );
 964                 $uid = $s->cur_user;
 965                 $pid = $s->cur_id;
 966
 967                 $from = str_replace( '_', ' ', wfCleanQueryVar( $from ) );
 968                 if( $from != $s->cur_user_text ) {
 969                         $wgOut->setPageTitle(wfmsg("rollbackfailed"));
 970                         $wgOut->addWikiText( wfMsg( "alreadyrolled",
 971                                 htmlspecialchars( $this->mTitle->getPrefixedText()),
 972                                 htmlspecialchars( $from ),
 973                                 htmlspecialchars( $s->cur_user_text ) ) );
 974                         if($s->cur_comment != "") {
 975                                 $wgOut->addHTML(
 976                                         wfMsg("editcomment",
 977                                         htmlspecialchars( $s->cur_comment ) ) );
 978                         }
 979                         return;
 980                 }
 981
 982                 # Get the last edit not by this guy
 983                 $sql = "SELECT old_text,old_user,old_user_text,old_timestamp,old_flags
 984                 FROM old USE INDEX (name_title_timestamp)
 985                 WHERE old_namespace={$n} AND old_title='{$tt}'
 986                 AND (old_user <> {$uid} OR old_user_text <> '{$ut}')
 987                 ORDER BY inverse_timestamp LIMIT 1";
 988                 $res = wfQuery( $sql, DB_READ );
 989                 if( wfNumRows( $res ) != 1 ) {
 990                         # Something wrong
 991                         $wgOut->setPageTitle(wfMsg("rollbackfailed"));
 992                         $wgOut->addHTML( wfMsg( "cantrollback" ) );
 993                         return;
 994                 }
 995                 $s = wfFetchObject( $res );
 996
 997                 if ( $bot ) {
 998                         # Mark all reverted edits as bot
 999                         $sql = "UPDATE recentchanges SET rc_bot=1 WHERE
1000                                 rc_cur_id=$pid AND rc_user=$uid AND rc_timestamp > '{$s->old_timestamp}'";
1001                         wfQuery( $sql, DB_WRITE, $fname );
1002                 }
1003
1004                 # Save it!
1005                 $newcomment = wfMsg( "revertpage", $s->old_user_text, $from );
1006                 $wgOut->setPagetitle( wfMsg( "actioncomplete" ) );
1007                 $wgOut->setRobotpolicy( "noindex,nofollow" );
1008                 $wgOut->addHTML( "<h2>" . $newcomment . "</h2>\n<hr>\n" );
1009                 $this->updateArticle( Article::getRevisionText( $s ), $newcomment, 1, $this->mTitle->userIsWatching(), "", $bot );
1010
1011                 Article::onArticleEdit( $this->mTitle );
1012                 $wgOut->returnToMain( false );
1013         }
1014
1015
1016         # Do standard deferred updates after page view
1017
1018         /* private */ function viewUpdates()
1019         {
1020                 global $wgDeferredUpdateList;
1021                 if ( 0 != $this->getID() ) {
1022                         global $wgDisableCounters;
1023                         if( !$wgDisableCounters ) {
1024                                 Article::incViewCount( $this->getID() );
1025                                 $u = new SiteStatsUpdate( 1, 0, 0 );
1026                                 array_push( $wgDeferredUpdateList, $u );
1027                         }
1028                         $u = new UserTalkUpdate( 0, $this->mTitle->getNamespace(),
1029                           $this->mTitle->getDBkey() );
1030                         array_push( $wgDeferredUpdateList, $u );
1031                 }
1032         }
1033
1034         # Do standard deferred updates after page edit.
1035         # Every 1000th edit, prune the recent changes table.
1036
1037         /* private */ function editUpdates( $text )
1038         {
1039                 global $wgDeferredUpdateList, $wgDBname, $wgMemc;
1040                 global $wgMessageCache;
1041
1042                 wfSeedRandom();
1043                 if ( 0 == mt_rand( 0, 999 ) ) {
1044                         $cutoff = wfUnix2Timestamp( time() - ( 7 * 86400 ) );
1045                         $sql = "DELETE FROM recentchanges WHERE rc_timestamp < '{$cutoff}'";
1046                         wfQuery( $sql, DB_WRITE );
1047                 }
1048                 $id = $this->getID();
1049                 $title = $this->mTitle->getPrefixedDBkey();
1050                 $shortTitle = $this->mTitle->getDBkey();
1051
1052                 $adj = $this->mCountAdjustment;
1053
1054                 if ( 0 != $id ) {
1055                         $u = new LinksUpdate( $id, $title );
1056                         array_push( $wgDeferredUpdateList, $u );
1057                         $u = new SiteStatsUpdate( 0, 1, $adj );
1058                         array_push( $wgDeferredUpdateList, $u );
1059                         $u = new SearchUpdate( $id, $title, $text );
1060                         array_push( $wgDeferredUpdateList, $u );
1061
1062                         $u = new UserTalkUpdate( 1, $this->mTitle->getNamespace(), $shortTitle );
1063                         array_push( $wgDeferredUpdateList, $u );
1064
1065                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
1066                                 $wgMessageCache->replace( $shortTitle, $text );
1067                         }
1068                 }
1069         }
1070
1071         /* private */ function setOldSubtitle()
1072         {
1073                 global $wgLang, $wgOut;
1074
1075                 $td = $wgLang->timeanddate( $this->mTimestamp, true );
1076                 $r = wfMsg( "revisionasof", $td );
1077                 $wgOut->setSubtitle( "({$r})" );
1078         }
1079
1080         # This function is called right before saving the wikitext,
1081         # so we can do things like signatures and links-in-context.
1082
1083         function preSaveTransform( $text )
1084         {
1085                 $s = "";
1086                 while ( "" != $text ) {
1087                         $p = preg_split( "/<\\s*nowiki\\s*>/i", $text, 2 );
1088                         $s .= $this->pstPass2( $p[0] );
1089
1090                         if ( ( count( $p ) < 2 ) || ( "" == $p[1] ) ) { $text = ""; }
1091                         else {
1092                                 $q = preg_split( "/<\\/\\s*nowiki\\s*>/i", $p[1], 2 );
1093                                 $s .= "<nowiki>{$q[0]}</nowiki>";
1094                                 $text = $q[1];
1095                         }
1096                 }
1097                 return rtrim( $s );
1098         }
1099
1100         /* private */ function pstPass2( $text )
1101         {
1102                 global $wgUser, $wgLang, $wgLocaltimezone;
1103
1104                 # Signatures
1105                 #
1106                 $n = $wgUser->getName();
1107                 $k = $wgUser->getOption( "nickname" );
1108                 if ( "" == $k ) { $k = $n; }
1109                 if(isset($wgLocaltimezone)) {
1110                         $oldtz = getenv("TZ"); putenv("TZ=$wgLocaltimezone");
1111                 }
1112                 /* Note: this is an ugly timezone hack for the European wikis */
1113                 $d = $wgLang->timeanddate( date( "YmdHis" ), false ) .
1114                   " (" . date( "T" ) . ")";
1115                 if(isset($wgLocaltimezone)) putenv("TZ=$oldtz");
1116
1117                 $text = preg_replace( "/~~~~/", "[[" . $wgLang->getNsText(
1118                   Namespace::getUser() ) . ":$n|$k]] $d", $text );
1119                 $text = preg_replace( "/~~~/", "[[" . $wgLang->getNsText(
1120                   Namespace::getUser() ) . ":$n|$k]]", $text );
1121
1122                 # Context links: [[|name]] and [[name (context)|]]
1123                 #
1124                 $tc = "[&;%\\-,.\\(\\)' _0-9A-Za-z\\/:\\x80-\\xff]";
1125                 $np = "[&;%\\-,.' _0-9A-Za-z\\/:\\x80-\\xff]"; # No parens
1126                 $namespacechar = '[ _0-9A-Za-z\x80-\xff]'; # Namespaces can use non-ascii!
1127                 $conpat = "/^({$np}+) \\(({$tc}+)\\)$/";
1128
1129                 $p1 = "/\[\[({$np}+) \\(({$np}+)\\)\\|]]/";             # [[page (context)|]]
1130                 $p2 = "/\[\[\\|({$tc}+)]]/";                                    # [[|page]]
1131                 $p3 = "/\[\[($namespacechar+):({$np}+)\\|]]/";          # [[namespace:page|]]
1132                 $p4 = "/\[\[($namespacechar+):({$np}+) \\(({$np}+)\\)\\|]]/";
1133                                                                                                                 # [[ns:page (cont)|]]
1134                 $context = "";
1135                 $t = $this->mTitle->getText();
1136                 if ( preg_match( $conpat, $t, $m ) ) {
1137                         $context = $m[2];
1138                 }
1139                 $text = preg_replace( $p4, "[[\\1:\\2 (\\3)|\\2]]", $text );
1140                 $text = preg_replace( $p1, "[[\\1 (\\2)|\\1]]", $text );
1141                 $text = preg_replace( $p3, "[[\\1:\\2|\\2]]", $text );
1142
1143                 if ( "" == $context ) {
1144                         $text = preg_replace( $p2, "[[\\1]]", $text );
1145                 } else {
1146                         $text = preg_replace( $p2, "[[\\1 ({$context})|\\1]]", $text );
1147                 }
1148
1149                 # {{SUBST:xxx}} variables
1150                 #
1151                 $mw =& MagicWord::get( MAG_SUBST );
1152                 $text = $mw->substituteCallback( $text, "wfReplaceSubstVar" );
1153
1154 /* Experimental:
1155                 # Trim trailing whitespace
1156                 # MAG_END (__END__) tag allows for trailing
1157                 # whitespace to be deliberately included
1158                 $text = rtrim( $text );
1159                 $mw =& MagicWord::get( MAG_END );
1160                 $mw->matchAndRemove( $text );
1161 */
1162                 return $text;
1163         }
1164
1165         /* Caching functions */
1166
1167         # checkLastModified returns true iff it has taken care of all
1168         # output to the client that is necessary for this request.
1169         # (that is, it has sent a cached version of the page)
1170         function tryFileCache() {
1171                 static $called = false;
1172                 if( $called ) {
1173                         wfDebug( " tryFileCache() -- called twice!?\n" );
1174                         return;
1175                 }
1176                 $called = true;
1177                 if($this->isFileCacheable()) {
1178                         $touched = $this->mTouched;
1179                         if( $this->mTitle->getPrefixedDBkey() == wfMsg( "mainpage" ) ) {
1180                                 # Expire the main page quicker
1181                                 $expire = wfUnix2Timestamp( time() - 3600 );
1182                                 $touched = max( $expire, $touched );
1183                         }
1184                         $cache = new CacheManager( $this->mTitle );
1185                         if($cache->isFileCacheGood( $touched )) {
1186                                 global $wgOut;
1187                                 wfDebug( " tryFileCache() - about to load\n" );
1188                                 $cache->loadFromFileCache();
1189                                 return true;
1190                         } else {
1191                                 wfDebug( " tryFileCache() - starting buffer\n" );
1192                                 ob_start( array(&$cache, 'saveToFileCache' ) );
1193                         }
1194                 } else {
1195                         wfDebug( " tryFileCache() - not cacheable\n" );
1196                 }
1197         }
1198
1199         function isFileCacheable() {
1200                 global $wgUser, $wgUseFileCache, $wgShowIPinHeader;
1201                 global $action, $oldid, $diff, $redirect, $printable;
1202                 return $wgUseFileCache
1203                         and (!$wgShowIPinHeader)
1204                         and ($this->getID() != 0)
1205                         and ($wgUser->getId() == 0)
1206                         and (!$wgUser->getNewtalk())
1207                         and ($this->mTitle->getNamespace() != Namespace::getSpecial())
1208                         and ($action == "view")
1209                         and (!isset($oldid))
1210                         and (!isset($diff))
1211                         and (!isset($redirect))
1212                         and (!isset($printable))
1213                         and (!$this->mRedirectedFrom);
1214         }
1215
1216         function checkTouched() {
1217                 $id = $this->getID();
1218                 $sql = "SELECT cur_touched,cur_is_redirect FROM cur WHERE cur_id=$id";
1219                 $res = wfQuery( $sql, DB_READ, "Article::checkTouched" );
1220                 if( $s = wfFetchObject( $res ) ) {
1221                         $this->mTouched = $s->cur_touched;
1222                         return !$s->cur_is_redirect;
1223                 } else {
1224                         return false;
1225                 }
1226         }
1227
1228         /* static */ function incViewCount( $id )
1229         {
1230                 $id = intval( $id );
1231                 global $wgHitcounterUpdateFreq;
1232
1233                 if( $wgHitcounterUpdateFreq <= 1 ){ //
1234                         wfQuery("UPDATE cur SET cur_counter = cur_counter + 1 " .
1235                                 "WHERE cur_id = $id", DB_WRITE);
1236                         return;
1237                 }
1238
1239                 # Not important enough to warrant an error page in case of failure
1240                 $oldignore = wfIgnoreSQLErrors( true );
1241
1242                 wfQuery("INSERT INTO hitcounter (hc_id) VALUES ({$id})", DB_WRITE);
1243
1244                 $checkfreq = intval( $wgHitcounterUpdateFreq/25 + 1 );
1245                 if( (rand() % $checkfreq != 0) or (wfLastErrno() != 0) ){
1246                         # Most of the time (or on SQL errors), skip row count check
1247                         wfIgnoreSQLErrors( $oldignore );
1248                         return;
1249                 }
1250
1251                 $res = wfQuery("SELECT COUNT(*) as n FROM hitcounter", DB_WRITE);
1252                 $row = wfFetchObject( $res );
1253                 $rown = intval( $row->n );
1254                 if( $rown >= $wgHitcounterUpdateFreq ){
1255                         wfProfileIn( "Article::incViewCount-collect" );
1256                         $old_user_abort = ignore_user_abort( true );
1257
1258                         wfQuery("LOCK TABLES hitcounter WRITE", DB_WRITE);
1259                         wfQuery("CREATE TEMPORARY TABLE acchits TYPE=HEAP ".
1260                                 "SELECT hc_id,COUNT(*) AS hc_n FROM hitcounter ".
1261                                 "GROUP BY hc_id", DB_WRITE);
1262                         wfQuery("DELETE FROM hitcounter", DB_WRITE);
1263                         wfQuery("UNLOCK TABLES", DB_WRITE);
1264                         wfQuery("UPDATE cur,acchits SET cur_counter=cur_counter + hc_n ".
1265                                 "WHERE cur_id = hc_id", DB_WRITE);
1266                         wfQuery("DROP TABLE acchits", DB_WRITE);
1267
1268                         ignore_user_abort( $old_user_abort );
1269                         wfProfileOut( "Article::incViewCount-collect" );
1270                 }
1271                 wfIgnoreSQLErrors( $oldignore );
1272         }
1273
1274         # The onArticle*() functions are supposed to be a kind of hooks
1275         # which should be called whenever any of the specified actions
1276         # are done.
1277         #
1278         # This is a good place to put code to clear caches, for instance.
1279
1280         /* static */ function onArticleCreate($title_obj){
1281                 global $wgEnablePersistentLC, $wgEnableParserCache;
1282                 if ( $wgEnablePersistentLC ) {
1283                         LinkCache::linksccClearBrokenLinksTo( $title_obj->getPrefixedDBkey() );
1284                 }
1285                 if ( $wgEnableParserCache ) {
1286                         OutputPage::parsercacheClearBrokenLinksTo( $title_obj->getPrefixedDBkey() );
1287                 }
1288         }
1289
1290         /* static */ function onArticleDelete($title_obj){
1291                 global $wgEnablePersistentLC, $wgEnableParserCache;
1292                 if ( $wgEnablePersistentLC ) {
1293                         LinkCache::linksccClearLinksTo( $title_obj->getArticleID() );
1294                 }
1295                 if ( $wgEnableParserCache ) {
1296                         OutputPage::parsercacheClearLinksTo( $title_obj->getArticleID() );
1297                 }
1298         }
1299
1300         /* static */ function onArticleEdit($title_obj){
1301                 global $wgEnablePersistentLC, $wgEnableParserCache;
1302                 if ( $wgEnablePersistentLC ) {
1303                         LinkCache::linksccClearPage( $title_obj->getArticleID() );
1304                 }
1305                 if ( $wgEnableParserCache ) {
1306                         OutputPage::parsercacheClearPage( $title_obj->getArticleID(), $title_obj->getNamespace() );
1307                 }
1308         }
1309 }
1310
1311 function wfReplaceSubstVar( $matches ) {
1312         return wfMsg( $matches[1] );
1313 }
1314
1315 ?>