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
 125                 # Pre-fill content with error message so that if something
 126                 # fails we'll have something telling us what we intended.
 127
 128                 $t = $this->mTitle->getPrefixedText();
 129                 if ( isset( $oldid ) ) {
 130                         $oldid = IntVal( $oldid );
 131                         $t .= ",oldid={$oldid}";
 132                 }
 133                 if ( isset( $redirect ) ) {
 134                         $redirect = ($redirect == "no") ? "no" : "yes";
 135                         $t .= ",redirect={$redirect}";
 136                 }
 137                 $this->mContent = wfMsg( "missingarticle", $t );
 138
 139                 if ( ! $oldid ) {       # Retrieve current version
 140                         $id = $this->getID();
 141                         if ( 0 == $id ) return;
 142
 143                         $sql = "SELECT " .
 144                           "cur_text,cur_timestamp,cur_user,cur_counter,cur_restrictions,cur_touched " .
 145                           "FROM cur WHERE cur_id={$id}";
 146                         wfDebug( "$sql\n" );
 147                         $res = wfQuery( $sql, DB_READ, $fname );
 148                         if ( 0 == wfNumRows( $res ) ) {
 149                                 return;
 150                         }
 151
 152                         $s = wfFetchObject( $res );
 153                         # If we got a redirect, follow it (unless we've been told
 154                         # not to by either the function parameter or the query
 155                         if ( ( "no" != $redirect ) && ( false == $noredir ) &&
 156                           ( $wgMwRedir->matchStart( $s->cur_text ) ) ) {
 157                                 if ( preg_match( "/\\[\\[([^\\]\\|]+)[\\]\\|]/",
 158                                   $s->cur_text, $m ) ) {
 159                                         $rt = Title::newFromText( $m[1] );
 160                                         if( $rt ) {
 161                                                 # Gotta hand redirects to special pages differently:
 162                                                 # Fill the HTTP response "Location" header and ignore
 163                                                 # the rest of the page we're on.
 164
 165                                                 if ( $rt->getInterwiki() != "" ) {
 166                                                         $wgOut->redirect( $rt->getFullURL() ) ;
 167                                                         return;
 168                                                 }
 169                                                 if ( $rt->getNamespace() == Namespace::getSpecial() ) {
 170                                                         $wgOut->redirect( $rt->getFullURL() );
 171                                                         return;
 172                                                 }
 173                                                 $rid = $rt->getArticleID();
 174                                                 if ( 0 != $rid ) {
 175                                                         $sql = "SELECT cur_text,cur_timestamp,cur_user," .
 176                                                           "cur_counter,cur_restrictions,cur_touched FROM cur WHERE cur_id={$rid}";
 177                                                         $res = wfQuery( $sql, DB_READ, $fname );
 178
 179                                                         if ( 0 != wfNumRows( $res ) ) {
 180                                                                 $this->mRedirectedFrom = $this->mTitle->getPrefixedText();
 181                                                                 $this->mTitle = $rt;
 182                                                                 $s = wfFetchObject( $res );
 183                                                         }
 184                                                 }
 185                                         }
 186                                 }
 187                         }
 188
 189                         $this->mContent = $s->cur_text;
 190                         $this->mUser = $s->cur_user;
 191                         $this->mCounter = $s->cur_counter;
 192                         $this->mTimestamp = $s->cur_timestamp;
 193                         $this->mTouched = $s->cur_touched;
 194                         $this->mTitle->mRestrictions = explode( ",", trim( $s->cur_restrictions ) );
 195                         $this->mTitle->mRestrictionsLoaded = true;
 196                         wfFreeResult( $res );
 197                 } else { # oldid set, retrieve historical version
 198                         $sql = "SELECT old_text,old_timestamp,old_user,old_flags FROM old " .
 199                           "WHERE old_id={$oldid}";
 200                         $res = wfQuery( $sql, DB_READ, $fname );
 201                         if ( 0 == wfNumRows( $res ) ) { return; }
 202
 203                         $s = wfFetchObject( $res );
 204                         $this->mContent = Article::getRevisionText( $s );
 205                         $this->mUser = $s->old_user;
 206                         $this->mCounter = 0;
 207                         $this->mTimestamp = $s->old_timestamp;
 208                         wfFreeResult( $res );
 209                 }
 210                 $this->mContentLoaded = true;
 211                 return $this->mContent;
 212         }
 213
 214         # Gets the article text without using so many damn globals
 215         # Returns false on error
 216         function getContentWithoutUsingSoManyDamnGlobals( $oldid = 0, $noredir = false ) {
 217                 global $wgMwRedir;
 218
 219                 if ( $this->mContentLoaded ) {
 220                         return $this->mContent;
 221                 }
 222                 $this->mContent = false;
 223
 224                 $fname = "Article::loadContent";
 225
 226                 if ( ! $oldid ) {       # Retrieve current version
 227                         $id = $this->getID();
 228                         if ( 0 == $id ) {
 229                                 return false;
 230                         }
 231
 232                         $sql = "SELECT " .
 233                           "cur_text,cur_timestamp,cur_user,cur_counter,cur_restrictions,cur_touched " .
 234                           "FROM cur WHERE cur_id={$id}";
 235                         $res = wfQuery( $sql, DB_READ, $fname );
 236                         if ( 0 == wfNumRows( $res ) ) {
 237                                 return false;
 238                         }
 239
 240                         $s = wfFetchObject( $res );
 241                         # If we got a redirect, follow it (unless we've been told
 242                         # not to by either the function parameter or the query
 243                         if ( !$noredir && $wgMwRedir->matchStart( $s->cur_text ) ) {
 244                                 if ( preg_match( "/\\[\\[([^\\]\\|]+)[\\]\\|]/",
 245                                   $s->cur_text, $m ) ) {
 246                                         $rt = Title::newFromText( $m[1] );
 247                                         if( $rt &&  $rt->getInterwiki() == "" && $rt->getNamespace() != Namespace::getSpecial() ) {
 248                                                 $rid = $rt->getArticleID();
 249                                                 if ( 0 != $rid ) {
 250                                                         $sql = "SELECT cur_text,cur_timestamp,cur_user," .
 251                                                           "cur_counter,cur_restrictions,cur_touched FROM cur WHERE cur_id={$rid}";
 252                                                         $res = wfQuery( $sql, DB_READ, $fname );
 253
 254                                                         if ( 0 != wfNumRows( $res ) ) {
 255                                                                 $this->mRedirectedFrom = $this->mTitle->getPrefixedText();
 256                                                                 $this->mTitle = $rt;
 257                                                                 $s = wfFetchObject( $res );
 258                                                         }
 259                                                 }
 260                                         }
 261                                 }
 262                         }
 263
 264                         $this->mContent = $s->cur_text;
 265                         $this->mUser = $s->cur_user;
 266                         $this->mCounter = $s->cur_counter;
 267                         $this->mTimestamp = $s->cur_timestamp;
 268                         $this->mTouched = $s->cur_touched;
 269                         $this->mTitle->mRestrictions = explode( ",", trim( $s->cur_restrictions ) );
 270                         $this->mTitle->mRestrictionsLoaded = true;
 271                         wfFreeResult( $res );
 272                 } else { # oldid set, retrieve historical version
 273                         $sql = "SELECT old_text,old_timestamp,old_user,old_flags FROM old " .
 274                           "WHERE old_id={$oldid}";
 275                         $res = wfQuery( $sql, DB_READ, $fname );
 276                         if ( 0 == wfNumRows( $res ) ) {
 277                                 return false;
 278                         }
 279
 280                         $s = wfFetchObject( $res );
 281                         $this->mContent = Article::getRevisionText( $s );
 282                         $this->mUser = $s->old_user;
 283                         $this->mCounter = 0;
 284                         $this->mTimestamp = $s->old_timestamp;
 285                         wfFreeResult( $res );
 286                 }
 287                 $this->mContentLoaded = true;
 288                 return $this->mContent;
 289         }
 290
 291         function getID() {
 292                 if( $this->mTitle ) {
 293                         return $this->mTitle->getArticleID();
 294                 } else {
 295                         return 0;
 296                 }
 297         }
 298
 299         function getCount()
 300         {
 301                 if ( -1 == $this->mCounter ) {
 302                         $id = $this->getID();
 303                         $this->mCounter = wfGetSQL( "cur", "cur_counter", "cur_id={$id}" );
 304                 }
 305                 return $this->mCounter;
 306         }
 307
 308         # Would the given text make this article a "good" article (i.e.,
 309         # suitable for including in the article count)?
 310
 311         function isCountable( $text )
 312         {
 313                 global $wgUseCommaCount, $wgMwRedir;
 314
 315                 if ( 0 != $this->mTitle->getNamespace() ) { return 0; }
 316                 if ( $wgMwRedir->matchStart( $text ) ) { return 0; }
 317                 $token = ($wgUseCommaCount ? "," : "[[" );
 318                 if ( false === strstr( $text, $token ) ) { return 0; }
 319                 return 1;
 320         }
 321
 322         # Loads everything from cur except cur_text
 323         # This isn't necessary for all uses, so it's only done if needed.
 324
 325         /* private */ function loadLastEdit()
 326         {
 327                 global $wgOut;
 328                 if ( -1 != $this->mUser ) return;
 329
 330                 $sql = "SELECT cur_user,cur_user_text,cur_timestamp," .
 331                   "cur_comment,cur_minor_edit FROM cur WHERE " .
 332                   "cur_id=" . $this->getID();
 333                 $res = wfQuery( $sql, DB_READ, "Article::loadLastEdit" );
 334
 335                 if ( wfNumRows( $res ) > 0 ) {
 336                         $s = wfFetchObject( $res );
 337                         $this->mUser = $s->cur_user;
 338                         $this->mUserText = $s->cur_user_text;
 339                         $this->mTimestamp = $s->cur_timestamp;
 340                         $this->mComment = $s->cur_comment;
 341                         $this->mMinorEdit = $s->cur_minor_edit;
 342                 }
 343         }
 344
 345         function getTimestamp()
 346         {
 347                 $this->loadLastEdit();
 348                 return $this->mTimestamp;
 349         }
 350
 351         function getUser()
 352         {
 353                 $this->loadLastEdit();
 354                 return $this->mUser;
 355         }
 356
 357         function getUserText()
 358         {
 359                 $this->loadLastEdit();
 360                 return $this->mUserText;
 361         }
 362
 363         function getComment()
 364         {
 365                 $this->loadLastEdit();
 366                 return $this->mComment;
 367         }
 368
 369         function getMinorEdit()
 370         {
 371                 $this->loadLastEdit();
 372                 return $this->mMinorEdit;
 373         }
 374
 375         # This is the default action of the script: just view the page of
 376         # the given title.
 377
 378         function view()
 379         {
 380                 global $wgUser, $wgOut, $wgLang;
 381                 global $oldid, $diff; # From query
 382                 global $wgLinkCache, $IP, $wgEnableParserCache;
 383
 384                 $fname = "Article::view";
 385                 wfProfileIn( $fname );
 386
 387                 $wgOut->setArticleFlag( true );
 388                 $wgOut->setRobotpolicy( "index,follow" );
 389
 390                 # If we got diff and oldid in the query, we want to see a
 391                 # diff page instead of the article.
 392
 393                 if ( isset( $diff ) ) {
 394                         $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
 395                         $de = new DifferenceEngine( $oldid, $diff );
 396                         $de->showDiffPage();
 397                         wfProfileOut( $fname );
 398                         return;
 399                 }
 400
 401                 if ( !isset( $oldid ) and $this->checkTouched() ) {
 402                         if( $wgOut->checkLastModified( $this->mTouched ) ){
 403                                 return;
 404                         } else if ( $this->tryFileCache() ) {
 405                                 # tell wgOut that output is taken care of
 406                                 $wgOut->disable();
 407                                 $this->viewUpdates();
 408                                 return;
 409                         }
 410                 }
 411
 412                 $text = $this->getContent(); # May change mTitle
 413                 $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
 414                 $wgOut->setHTMLTitle( $this->mTitle->getPrefixedText() .
 415                   " - " . wfMsg( "wikititlesuffix" ) );
 416
 417                 # We're looking at an old revision
 418
 419                 if ( $oldid ) {
 420                         $this->setOldSubtitle();
 421                         $wgOut->setRobotpolicy( "noindex,follow" );
 422                 }
 423                 if ( "" != $this->mRedirectedFrom ) {
 424                         $sk = $wgUser->getSkin();
 425                         $redir = $sk->makeKnownLink( $this->mRedirectedFrom, "",
 426                           "redirect=no" );
 427                         $s = wfMsg( "redirectedfrom", $redir );
 428                         $wgOut->setSubtitle( $s );
 429                 }
 430
 431                 $wgLinkCache->preFill( $this->mTitle );
 432
 433                 if( $wgEnableParserCache && intval($wgUser->getOption( "stubthreshold" )) == 0 ){
 434                         $wgOut->addWikiText( $text, true, $this );
 435                 } else {
 436                         $wgOut->addWikiText( $text );
 437                 }
 438
 439                 # Add link titles as META keywords
 440                 $wgOut->addMetaTags() ;
 441
 442                 $this->viewUpdates();
 443                 wfProfileOut( $fname );
 444         }
 445
 446         # Theoretically we could defer these whole insert and update
 447         # functions for after display, but that's taking a big leap
 448         # of faith, and we want to be able to report database
 449         # errors at some point.
 450
 451         /* private */ function insertNewArticle( $text, $summary, $isminor, $watchthis )
 452         {
 453                 global $wgOut, $wgUser, $wgLinkCache, $wgMwRedir;
 454                 global $wgUseSquid, $wgDeferredUpdateList, $wgInternalServer;
 455
 456                 $fname = "Article::insertNewArticle";
 457
 458                 $this->mCountAdjustment = $this->isCountable( $text );
 459
 460                 $ns = $this->mTitle->getNamespace();
 461                 $ttl = $this->mTitle->getDBkey();
 462                 $text = $this->preSaveTransform( $text );
 463                 if ( $wgMwRedir->matchStart( $text ) ) { $redir = 1; }
 464                 else { $redir = 0; }
 465
 466                 $now = wfTimestampNow();
 467                 $won = wfInvertTimestamp( $now );
 468                 wfSeedRandom();
 469                 $rand = number_format( mt_rand() / mt_getrandmax(), 12, ".", "" );
 470                 $isminor = ( $isminor && $wgUser->getID() ) ? 1 : 0;
 471                 $sql = "INSERT INTO cur (cur_namespace,cur_title,cur_text," .
 472                   "cur_comment,cur_user,cur_timestamp,cur_minor_edit,cur_counter," .
 473                   "cur_restrictions,cur_user_text,cur_is_redirect," .
 474                   "cur_is_new,cur_random,cur_touched,inverse_timestamp) VALUES ({$ns},'" . wfStrencode( $ttl ) . "', '" .
 475                   wfStrencode( $text ) . "', '" .
 476                   wfStrencode( $summary ) . "', '" .
 477                   $wgUser->getID() . "', '{$now}', " .
 478                   $isminor . ", 0, '', '" .
 479                   wfStrencode( $wgUser->getName() ) . "', $redir, 1, $rand, '{$now}', '{$won}')";
 480                 $res = wfQuery( $sql, DB_WRITE, $fname );
 481
 482                 $newid = wfInsertId();
 483                 $this->mTitle->resetArticleID( $newid );
 484
 485                 Article::onArticleCreate( $this->mTitle );
 486                 RecentChange::notifyNew( $now, $this->mTitle, $isminor, $wgUser, $summary );
 487
 488                 if ($watchthis) {
 489                         if(!$this->mTitle->userIsWatching()) $this->watch();
 490                 } else {
 491                         if ( $this->mTitle->userIsWatching() ) {
 492                                 $this->unwatch();
 493                         }
 494                 }
 495
 496                 # The talk page isn't in the regular link tables, so we need to update manually:
 497                 $talkns = $ns ^ 1; # talk -> normal; normal -> talk
 498                 $sql = "UPDATE cur set cur_touched='$now' WHERE cur_namespace=$talkns AND cur_title='" . wfStrencode( $ttl ) . "'";
 499                 wfQuery( $sql, DB_WRITE );
 500
 501                 # standard deferred updates
 502                 $this->editUpdates( $text );
 503
 504                 $this->showArticle( $text, wfMsg( "newarticle" ) );
 505         }
 506
 507
 508         /* Side effects: loads last edit */
 509         function getTextOfLastEditWithSectionReplacedOrAdded($section, $text, $summary = ""){
 510                 $this->loadLastEdit();
 511                 $oldtext = $this->getContent();
 512                 if ($section != "") {
 513                         if($section=="new") {
 514                                 if($summary) $subject="== {$summary} ==\n\n";
 515                                 $text=$oldtext."\n\n".$subject.$text;
 516                         } else {
 517                                 $secs=preg_split("/(^=+.*?=+|^<h[1-6].*?>.*?<\/h[1-6].*?>)/mi",
 518                                   $oldtext,-1,PREG_SPLIT_DELIM_CAPTURE);
 519                                 $secs[$section*2]=$text."\n\n"; // replace with edited
 520                                 if($section) { $secs[$section*2-1]=""; } // erase old headline
 521                                 $text=join("",$secs);
 522                         }
 523                 }
 524                 return $text;
 525         }
 526
 527         function updateArticle( $text, $summary, $minor, $watchthis, $forceBot = false )
 528         {
 529                 global $wgOut, $wgUser, $wgLinkCache;
 530                 global $wgDBtransactions, $wgMwRedir;
 531                 global $wgUseSquid, $wgInternalServer;
 532                 $fname = "Article::updateArticle";
 533
 534                 if ( $this->mMinorEdit ) { $me1 = 1; } else { $me1 = 0; }
 535                 if ( $minor && $wgUser->getID() ) { $me2 = 1; } else { $me2 = 0; }
 536                 if ( preg_match( "/^((" . $wgMwRedir->getBaseRegex() . ")[^\\n]+)/i", $text, $m ) ) {
 537                         $redir = 1;
 538                         $text = $m[1] . "\n"; # Remove all content but redirect
 539                 }
 540                 else { $redir = 0; }
 541
 542                 $text = $this->preSaveTransform( $text );
 543
 544                 # Update article, but only if changed.
 545
 546                 if( $wgDBtransactions ) {
 547                         $sql = "BEGIN";
 548                         wfQuery( $sql, DB_WRITE );
 549                 }
 550                 $oldtext = $this->getContent( true );
 551
 552                 if ( 0 != strcmp( $text, $oldtext ) ) {
 553                         $this->mCountAdjustment = $this->isCountable( $text )
 554                           - $this->isCountable( $oldtext );
 555
 556                         $now = wfTimestampNow();
 557                         $won = wfInvertTimestamp( $now );
 558                         $sql = "UPDATE cur SET cur_text='" . wfStrencode( $text ) .
 559                           "',cur_comment='" .  wfStrencode( $summary ) .
 560                           "',cur_minor_edit={$me2}, cur_user=" . $wgUser->getID() .
 561                           ",cur_timestamp='{$now}',cur_user_text='" .
 562                           wfStrencode( $wgUser->getName() ) .
 563                           "',cur_is_redirect={$redir}, cur_is_new=0, cur_touched='{$now}', inverse_timestamp='{$won}' " .
 564                           "WHERE cur_id=" . $this->getID() .
 565                           " AND cur_timestamp='" . $this->getTimestamp() . "'";
 566                         $res = wfQuery( $sql, DB_WRITE, $fname );
 567
 568                         if( wfAffectedRows() == 0 ) {
 569                                 /* Belated edit conflict! Run away!! */
 570                                 return false;
 571                         }
 572
 573                         # This overwrites $oldtext if revision compression is on
 574                         $flags = Article::compressRevisionText( $oldtext );
 575
 576                         $sql = "INSERT INTO old (old_namespace,old_title,old_text," .
 577                           "old_comment,old_user,old_user_text,old_timestamp," .
 578                           "old_minor_edit,inverse_timestamp,old_flags) VALUES (" .
 579                           $this->mTitle->getNamespace() . ", '" .
 580                           wfStrencode( $this->mTitle->getDBkey() ) . "', '" .
 581                           wfStrencode( $oldtext ) . "', '" .
 582                           wfStrencode( $this->getComment() ) . "', " .
 583                           $this->getUser() . ", '" .
 584                           wfStrencode( $this->getUserText() ) . "', '" .
 585                           $this->getTimestamp() . "', " . $me1 . ", '" .
 586                           wfInvertTimestamp( $this->getTimestamp() ) . "','$flags')";
 587                         $res = wfQuery( $sql, DB_WRITE, $fname );
 588                         $oldid = wfInsertID( $res );
 589
 590                         $bot = (int)($wgUser->isBot() || $forceBot);
 591                         RecentChange::notifyEdit( $now, $this->mTitle, $me2, $wgUser, $summary,
 592                                 $oldid, $this->getTimestamp(), $bot );
 593                         Article::onArticleEdit( $this->mTitle );
 594                 }
 595
 596                 if( $wgDBtransactions ) {
 597                         $sql = "COMMIT";
 598                         wfQuery( $sql, DB_WRITE );
 599                 }
 600
 601                 if ($watchthis) {
 602                         if (!$this->mTitle->userIsWatching()) $this->watch();
 603                 } else {
 604                         if ( $this->mTitle->userIsWatching() ) {
 605                                 $this->unwatch();
 606                         }
 607                 }
 608                 # standard deferred updates
 609                 $this->editUpdates( $text );
 610
 611
 612                 $urls = array();
 613                 # Template namespace
 614                 # Purge all articles linking here
 615                 if ( $this->mTitle->getNamespace() == NS_TEMPLATE) {
 616                         $titles = $this->mTitle->getLinksTo();
 617                         Title::touchArray( $titles );
 618                         if ( $wgUseSquid ) {
 619                                 foreach ( $titles as $title ) {
 620                                         $urls[] = $title->getInternalURL();
 621                                 }
 622                         }
 623                 }
 624
 625                 # Squid updates
 626                 if ( $wgUseSquid ) {
 627                         $urls = array_merge( $urls, $this->mTitle->getSquidURLs() );
 628                         $u = new SquidUpdate( $urls );
 629                         $u->doUpdate();
 630                 }
 631
 632                 $this->showArticle( $text, wfMsg( "updated" ) );
 633                 return true;
 634         }
 635
 636         # After we've either updated or inserted the article, update
 637         # the link tables and redirect to the new page.
 638
 639         function showArticle( $text, $subtitle )
 640         {
 641                 global $wgOut, $wgUser, $wgLinkCache;
 642                 global $wgMwRedir;
 643
 644                 $wgLinkCache = new LinkCache();
 645
 646                 # Get old version of link table to allow incremental link updates
 647                 $wgLinkCache->preFill( $this->mTitle );
 648                 $wgLinkCache->clear();
 649
 650                 # Now update the link cache by parsing the text
 651                 $wgOut = new OutputPage();
 652                 $wgOut->addWikiText( $text );
 653
 654                 if( $wgMwRedir->matchStart( $text ) )
 655                         $r = "redirect=no";
 656                 else
 657                         $r = "";
 658                 $wgOut->redirect( $this->mTitle->getFullURL( $r ) );
 659         }
 660
 661         # Add this page to my watchlist
 662
 663         function watch( $add = true )
 664         {
 665                 global $wgUser, $wgOut, $wgLang;
 666                 global $wgDeferredUpdateList;
 667
 668                 if ( 0 == $wgUser->getID() ) {
 669                         $wgOut->errorpage( "watchnologin", "watchnologintext" );
 670                         return;
 671                 }
 672                 if ( wfReadOnly() ) {
 673                         $wgOut->readOnlyPage();
 674                         return;
 675                 }
 676                 if( $add )
 677                         $wgUser->addWatch( $this->mTitle );
 678                 else
 679                         $wgUser->removeWatch( $this->mTitle );
 680
 681                 $wgOut->setPagetitle( wfMsg( $add ? "addedwatch" : "removedwatch" ) );
 682                 $wgOut->setRobotpolicy( "noindex,follow" );
 683
 684                 $sk = $wgUser->getSkin() ;
 685                 $link = $sk->makeKnownLink ( $this->mTitle->getPrefixedText() ) ;
 686
 687                 if($add)
 688                         $text = wfMsg( "addedwatchtext", $link );
 689                 else
 690                         $text = wfMsg( "removedwatchtext", $link );
 691                 $wgOut->addHTML( $text );
 692
 693                 $up = new UserUpdate();
 694                 array_push( $wgDeferredUpdateList, $up );
 695
 696                 $wgOut->returnToMain( false );
 697         }
 698
 699         function unwatch()
 700         {
 701                 $this->watch( false );
 702         }
 703
 704         function protect( $limit = "sysop" )
 705         {
 706                 global $wgUser, $wgOut;
 707
 708                 if ( ! $wgUser->isSysop() ) {
 709                         $wgOut->sysopRequired();
 710                         return;
 711                 }
 712                 if ( wfReadOnly() ) {
 713                         $wgOut->readOnlyPage();
 714                         return;
 715                 }
 716                 $id = $this->mTitle->getArticleID();
 717                 if ( 0 == $id ) {
 718                         $wgOut->fatalEror( wfMsg( "badarticleerror" ) );
 719                         return;
 720                 }
 721         $sql = "UPDATE cur SET cur_touched='" . wfTimestampNow() . "'," .
 722                         "cur_restrictions='{$limit}' WHERE cur_id={$id}";
 723                 wfQuery( $sql, DB_WRITE, "Article::protect" );
 724
 725                 $log = new LogPage( wfMsg( "protectlogpage" ), wfMsg( "protectlogtext" ) );
 726                 if ( $limit === "" ) {
 727                         $log->addEntry( wfMsg( "unprotectedarticle", $this->mTitle->getPrefixedText() ), "" );
 728                 } else {
 729                         $log->addEntry( wfMsg( "protectedarticle", $this->mTitle->getPrefixedText() ), "" );
 730                 }
 731                 $wgOut->redirect( $this->mTitle->getFullURL() );
 732         }
 733
 734         function unprotect()
 735         {
 736                 return $this->protect( "" );
 737         }
 738
 739         function delete()
 740         {
 741                 global $wgUser, $wgOut, $wgMessageCache;
 742                 global $wpConfirm, $wpReason, $image, $oldimage;
 743                 $fname = "Article::delete";
 744
 745                 # This code desperately needs to be totally rewritten
 746
 747                 if ( ( ! $wgUser->isSysop() ) ) {
 748                         $wgOut->sysopRequired();
 749                         return;
 750                 }
 751                 if ( wfReadOnly() ) {
 752                         $wgOut->readOnlyPage();
 753                         return;
 754                 }
 755
 756                 # Better double-check that it hasn't been deleted yet!
 757                 $wgOut->setPagetitle( wfMsg( "confirmdelete" ) );
 758                 if ( ( "" == trim( $this->mTitle->getText() ) )
 759                   or ( $this->mTitle->getArticleId() == 0 ) ) {
 760                         $wgOut->fatalError( wfMsg( "cannotdelete" ) );
 761                         return;
 762                 }
 763
 764                 if ( @$_POST["wpConfirm"] ) {
 765                         $this->doDelete();
 766                         return;
 767                 }
 768
 769                 # determine whether this page has earlier revisions
 770                 # and insert a warning if it does
 771                 # we select the text because it might be useful below
 772                 $ns = $this->mTitle->getNamespace();
 773                 $title = $this->mTitle->getDBkey();
 774                 $etitle = wfStrencode( $title );
 775                 $sql = "SELECT old_text,old_flags FROM old WHERE old_namespace=$ns and old_title='$etitle' ORDER BY inverse_timestamp LIMIT 1";
 776                 $res = wfQuery( $sql, DB_READ, $fname );
 777                 if( ($old=wfFetchObject($res)) && !$wpConfirm ) {
 778                         $skin=$wgUser->getSkin();
 779                         $wgOut->addHTML("<B>".wfMsg("historywarning"));
 780                         $wgOut->addHTML( $skin->historyLink() ."</B><P>");
 781                 }
 782
 783                 $sql="SELECT cur_text FROM cur WHERE cur_namespace=$ns and cur_title='$etitle'";
 784                 $res=wfQuery($sql, DB_READ, $fname);
 785                 if( ($s=wfFetchObject($res))) {
 786
 787                         # if this is a mini-text, we can paste part of it into the deletion reason
 788
 789                         #if this is empty, an earlier revision may contain "useful" text
 790                         $blanked = false;
 791                         if($s->cur_text!="") {
 792                                 $text=$s->cur_text;
 793                         } else {
 794                                 if($old) {
 795                                         $text = Article::getRevisionText( $old );
 796                                         $blanked = true;
 797                                 }
 798
 799                         }
 800
 801                         $length=strlen($text);
 802
 803                         # this should not happen, since it is not possible to store an empty, new
 804                         # page. Let's insert a standard text in case it does, though
 805                         if($length==0 && !$wpReason) { $wpReason=wfmsg("exblank");}
 806
 807
 808                         if($length < 500 && !$wpReason) {
 809
 810                                 # comment field=255, let's grep the first 150 to have some user
 811                                 # space left
 812                                 $text=substr($text,0,150);
 813                                 # let's strip out newlines and HTML tags
 814                                 $text=preg_replace("/\"/","'",$text);
 815                                 $text=preg_replace("/\</","&lt;",$text);
 816                                 $text=preg_replace("/\>/","&gt;",$text);
 817                                 $text=preg_replace("/[\n\r]/","",$text);
 818                                 if(!$blanked) {
 819                                         $wpReason=wfMsg("excontent"). " '".$text;
 820                                 } else {
 821                                         $wpReason=wfMsg("exbeforeblank") . " '".$text;
 822                                 }
 823                                 if($length>150) { $wpReason .= "..."; } # we've only pasted part of the text
 824                                 $wpReason.="'";
 825                         }
 826                 }
 827
 828                 return $this->confirmDelete();
 829         }
 830
 831         function confirmDelete( $par = "" )
 832         {
 833                 global $wgOut;
 834                 global $wpReason;
 835
 836                 wfDebug( "Article::confirmDelete\n" );
 837
 838                 $sub = htmlspecialchars( $this->mTitle->getPrefixedText() );
 839                 $wgOut->setSubtitle( wfMsg( "deletesub", $sub ) );
 840                 $wgOut->setRobotpolicy( "noindex,nofollow" );
 841                 $wgOut->addWikiText( wfMsg( "confirmdeletetext" ) );
 842
 843                 $formaction = $this->mTitle->escapeLocalURL( "action=delete" . $par );
 844
 845                 $confirm = wfMsg( "confirm" );
 846                 $check = wfMsg( "confirmcheck" );
 847                 $delcom = wfMsg( "deletecomment" );
 848
 849                 $wgOut->addHTML( "
 850 <form id=\"deleteconfirm\" method=\"post\" action=\"{$formaction}\">
 851 <table border=0><tr><td align=right>
 852 {$delcom}:</td><td align=left>
 853 <input type=text size=60 name=\"wpReason\" value=\"" . htmlspecialchars( $wpReason ) . "\">
 854 </td></tr><tr><td>&nbsp;</td></tr>
 855 <tr><td align=right>
 856 <input type=checkbox name=\"wpConfirm\" value='1' id=\"wpConfirm\">
 857 </td><td><label for=\"wpConfirm\">{$check}</label></td>
 858 </tr><tr><td>&nbsp;</td><td>
 859 <input type=submit name=\"wpConfirmB\" value=\"{$confirm}\">
 860 </td></tr></table></form>\n" );
 861
 862                 $wgOut->returnToMain( false );
 863         }
 864
 865         function doDelete()
 866         {
 867                 global $wgOut, $wgUser, $wgLang;
 868                 global $wpReason;
 869                 $fname = "Article::doDelete";
 870                 wfDebug( "$fname\n" );
 871
 872                 if ( $this->doDeleteArticle() ) {
 873                         $deleted = $this->mTitle->getPrefixedText();
 874
 875                         $wgOut->setPagetitle( wfMsg( "actioncomplete" ) );
 876                         $wgOut->setRobotpolicy( "noindex,nofollow" );
 877
 878                         $sk = $wgUser->getSkin();
 879                         $loglink = $sk->makeKnownLink( $wgLang->getNsText(
 880                           Namespace::getWikipedia() ) .
 881                           ":" . wfMsg( "dellogpage" ), wfMsg( "deletionlog" ) );
 882
 883                         $text = wfMsg( "deletedtext", $deleted, $loglink );
 884
 885                         $wgOut->addHTML( "<p>" . $text );
 886                         $wgOut->returnToMain( false );
 887                 } else {
 888                         $wgOut->fatalError( wfMsg( "cannotdelete" ) );
 889                 }
 890         }
 891
 892         # Delete the article, returns success
 893         function doDeleteArticle()
 894         {
 895                 global $wgUser, $wgLang, $wgRequest;
 896                 global  $wgUseSquid, $wgDeferredUpdateList, $wgInternalServer;
 897
 898                 $fname = "Article::doDeleteArticle";
 899                 wfDebug( "$fname\n" );
 900
 901                 $ns = $this->mTitle->getNamespace();
 902                 $t = wfStrencode( $this->mTitle->getDBkey() );
 903                 $id = $this->mTitle->getArticleID();
 904
 905                 if ( "" == $t || $id == 0 ) {
 906                         return false;
 907                 }
 908
 909                 $u = new SiteStatsUpdate( 0, 1, -$this->isCountable( $this->getContent( true ) ) );
 910                 array_push( $wgDeferredUpdateList, $u );
 911
 912                 $linksTo = $this->mTitle->getLinksTo();
 913
 914                 # Squid purging
 915                 if ( $wgUseSquid ) {
 916                         $urls = array(
 917                                 $this->mTitle->getInternalURL(),
 918                                 $this->mTitle->getInternalURL( "history" )
 919                         );
 920                         foreach ( $linksTo as $linkTo ) {
 921                                 $urls[] = $linkTo->getInternalURL();
 922                         }
 923
 924                         $u = new SquidUpdate( $urls );
 925                         array_push( $wgDeferredUpdateList, $u );
 926
 927                 }
 928
 929                 # Client and file cache invalidation
 930                 Title::touchArray( $linksTo );
 931
 932                 # Move article and history to the "archive" table
 933                 $sql = "INSERT INTO archive (ar_namespace,ar_title,ar_text," .
 934                   "ar_comment,ar_user,ar_user_text,ar_timestamp,ar_minor_edit," .
 935                   "ar_flags) SELECT cur_namespace,cur_title,cur_text,cur_comment," .
 936                   "cur_user,cur_user_text,cur_timestamp,cur_minor_edit,0 FROM cur " .
 937                   "WHERE cur_namespace={$ns} AND cur_title='{$t}'";
 938                 wfQuery( $sql, DB_WRITE, $fname );
 939
 940                 $sql = "INSERT INTO archive (ar_namespace,ar_title,ar_text," .
 941                   "ar_comment,ar_user,ar_user_text,ar_timestamp,ar_minor_edit," .
 942                   "ar_flags) SELECT old_namespace,old_title,old_text,old_comment," .
 943                   "old_user,old_user_text,old_timestamp,old_minor_edit,old_flags " .
 944                   "FROM old WHERE old_namespace={$ns} AND old_title='{$t}'";
 945                 wfQuery( $sql, DB_WRITE, $fname );
 946
 947                 # Now that it's safely backed up, delete it
 948
 949                 $sql = "DELETE FROM cur WHERE cur_namespace={$ns} AND " .
 950                   "cur_title='{$t}'";
 951                 wfQuery( $sql, DB_WRITE, $fname );
 952
 953                 $sql = "DELETE FROM old WHERE old_namespace={$ns} AND " .
 954                   "old_title='{$t}'";
 955                 wfQuery( $sql, DB_WRITE, $fname );
 956
 957                 $sql = "DELETE FROM recentchanges WHERE rc_namespace={$ns} AND " .
 958                   "rc_title='{$t}'";
 959                 wfQuery( $sql, DB_WRITE, $fname );
 960
 961                 # Finally, clean up the link tables
 962                 $t = wfStrencode( $this->mTitle->getPrefixedDBkey() );
 963
 964                 Article::onArticleDelete( $this->mTitle );
 965
 966                 $sql = "INSERT INTO brokenlinks (bl_from,bl_to) VALUES ";
 967                 $first = true;
 968
 969                 foreach ( $linksTo as $titleObj ) {
 970                         if ( ! $first ) { $sql .= ","; }
 971                         $first = false;
 972                         # Get article ID. Efficient because it was loaded into the cache by getLinksTo().
 973                         $linkID = $titleObj->getArticleID();
 974                         $sql .= "({$linkID},'{$t}')";
 975                 }
 976                 if ( ! $first ) {
 977                         wfQuery( $sql, DB_WRITE, $fname );
 978                 }
 979
 980                 $sql = "DELETE FROM links WHERE l_to={$id}";
 981                 wfQuery( $sql, DB_WRITE, $fname );
 982
 983                 $sql = "DELETE FROM links WHERE l_from={$id}";
 984                 wfQuery( $sql, DB_WRITE, $fname );
 985
 986                 $sql = "DELETE FROM imagelinks WHERE il_from={$id}";
 987                 wfQuery( $sql, DB_WRITE, $fname );
 988
 989                 $sql = "DELETE FROM brokenlinks WHERE bl_from={$id}";
 990                 wfQuery( $sql, DB_WRITE, $fname );
 991
 992                 $log = new LogPage( wfMsg( "dellogpage" ), wfMsg( "dellogpagetext" ) );
 993                 $art = $this->mTitle->getPrefixedText();
 994                 $wpReason = $wgRequest->getText( "wpReason" );
 995                 $log->addEntry( wfMsg( "deletedarticle", $art ), $wpReason );
 996
 997                 # Clear the cached article id so the interface doesn't act like we exist
 998                 $this->mTitle->resetArticleID( 0 );
 999                 $this->mTitle->mArticleID = 0;
1000                 return true;
1001         }
1002
1003         function rollback()
1004         {
1005                 global $wgUser, $wgLang, $wgOut, $wgRequest;
1006
1007                 if ( ! $wgUser->isSysop() ) {
1008                         $wgOut->sysopRequired();
1009                         return;
1010                 }
1011                 if ( wfReadOnly() ) {
1012                         $wgOut->readOnlyPage( $this->getContent() );
1013                         return;
1014                 }
1015
1016                 # Enhanced rollback, marks edits rc_bot=1
1017                 $bot = $wgRequest->getBool( 'bot' );
1018
1019                 # Replace all this user's current edits with the next one down
1020                 $tt = wfStrencode( $this->mTitle->getDBKey() );
1021                 $n = $this->mTitle->getNamespace();
1022
1023                 # Get the last editor
1024                 $sql = "SELECT cur_id,cur_user,cur_user_text,cur_comment FROM cur WHERE cur_title='{$tt}' AND cur_namespace={$n}";
1025                 $res = wfQuery( $sql, DB_READ );
1026                 if( ($x = wfNumRows( $res )) != 1 ) {
1027                         # Something wrong
1028                         $wgOut->addHTML( wfMsg( "notanarticle" ) );
1029                         return;
1030                 }
1031                 $s = wfFetchObject( $res );
1032                 $ut = wfStrencode( $s->cur_user_text );
1033                 $uid = $s->cur_user;
1034                 $pid = $s->cur_id;
1035
1036                 $from = str_replace( '_', ' ', $wgRequest->getVal( "from" ) );
1037                 if( $from != $s->cur_user_text ) {
1038                         $wgOut->setPageTitle(wfmsg("rollbackfailed"));
1039                         $wgOut->addWikiText( wfMsg( "alreadyrolled",
1040                                 htmlspecialchars( $this->mTitle->getPrefixedText()),
1041                                 htmlspecialchars( $from ),
1042                                 htmlspecialchars( $s->cur_user_text ) ) );
1043                         if($s->cur_comment != "") {
1044                                 $wgOut->addHTML(
1045                                         wfMsg("editcomment",
1046                                         htmlspecialchars( $s->cur_comment ) ) );
1047                         }
1048                         return;
1049                 }
1050
1051                 # Get the last edit not by this guy
1052                 $sql = "SELECT old_text,old_user,old_user_text,old_timestamp,old_flags
1053                 FROM old USE INDEX (name_title_timestamp)
1054                 WHERE old_namespace={$n} AND old_title='{$tt}'
1055                 AND (old_user <> {$uid} OR old_user_text <> '{$ut}')
1056                 ORDER BY inverse_timestamp LIMIT 1";
1057                 $res = wfQuery( $sql, DB_READ );
1058                 if( wfNumRows( $res ) != 1 ) {
1059                         # Something wrong
1060                         $wgOut->setPageTitle(wfMsg("rollbackfailed"));
1061                         $wgOut->addHTML( wfMsg( "cantrollback" ) );
1062                         return;
1063                 }
1064                 $s = wfFetchObject( $res );
1065
1066                 if ( $bot ) {
1067                         # Mark all reverted edits as bot
1068                         $sql = "UPDATE recentchanges SET rc_bot=1 WHERE
1069                                 rc_cur_id=$pid AND rc_user=$uid AND rc_timestamp > '{$s->old_timestamp}'";
1070                         wfQuery( $sql, DB_WRITE, $fname );
1071                 }
1072
1073                 # Save it!
1074                 $newcomment = wfMsg( "revertpage", $s->old_user_text, $from );
1075                 $wgOut->setPagetitle( wfMsg( "actioncomplete" ) );
1076                 $wgOut->setRobotpolicy( "noindex,nofollow" );
1077                 $wgOut->addHTML( "<h2>" . $newcomment . "</h2>\n<hr>\n" );
1078                 $this->updateArticle( Article::getRevisionText( $s ), $newcomment, 1, $this->mTitle->userIsWatching(), $bot );
1079                 Article::onArticleEdit( $this->mTitle );
1080                 $wgOut->returnToMain( false );
1081         }
1082
1083
1084         # Do standard deferred updates after page view
1085
1086         /* private */ function viewUpdates()
1087         {
1088                 global $wgDeferredUpdateList;
1089                 if ( 0 != $this->getID() ) {
1090                         global $wgDisableCounters;
1091                         if( !$wgDisableCounters ) {
1092                                 Article::incViewCount( $this->getID() );
1093                                 $u = new SiteStatsUpdate( 1, 0, 0 );
1094                                 array_push( $wgDeferredUpdateList, $u );
1095                         }
1096                         $u = new UserTalkUpdate( 0, $this->mTitle->getNamespace(),
1097                           $this->mTitle->getDBkey() );
1098                         array_push( $wgDeferredUpdateList, $u );
1099                 }
1100         }
1101
1102         # Do standard deferred updates after page edit.
1103         # Every 1000th edit, prune the recent changes table.
1104
1105         /* private */ function editUpdates( $text )
1106         {
1107                 global $wgDeferredUpdateList, $wgDBname, $wgMemc;
1108                 global $wgMessageCache;
1109
1110                 wfSeedRandom();
1111                 if ( 0 == mt_rand( 0, 999 ) ) {
1112                         $cutoff = wfUnix2Timestamp( time() - ( 7 * 86400 ) );
1113                         $sql = "DELETE FROM recentchanges WHERE rc_timestamp < '{$cutoff}'";
1114                         wfQuery( $sql, DB_WRITE );
1115                 }
1116                 $id = $this->getID();
1117                 $title = $this->mTitle->getPrefixedDBkey();
1118                 $shortTitle = $this->mTitle->getDBkey();
1119
1120                 $adj = $this->mCountAdjustment;
1121
1122                 if ( 0 != $id ) {
1123                         $u = new LinksUpdate( $id, $title );
1124                         array_push( $wgDeferredUpdateList, $u );
1125                         $u = new SiteStatsUpdate( 0, 1, $adj );
1126                         array_push( $wgDeferredUpdateList, $u );
1127                         $u = new SearchUpdate( $id, $title, $text );
1128                         array_push( $wgDeferredUpdateList, $u );
1129
1130                         $u = new UserTalkUpdate( 1, $this->mTitle->getNamespace(), $shortTitle );
1131                         array_push( $wgDeferredUpdateList, $u );
1132
1133                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
1134                                 $wgMessageCache->replace( $shortTitle, $text );
1135                         }
1136                 }
1137         }
1138
1139         /* private */ function setOldSubtitle()
1140         {
1141                 global $wgLang, $wgOut;
1142
1143                 $td = $wgLang->timeanddate( $this->mTimestamp, true );
1144                 $r = wfMsg( "revisionasof", $td );
1145                 $wgOut->setSubtitle( "({$r})" );
1146         }
1147
1148         # This function is called right before saving the wikitext,
1149         # so we can do things like signatures and links-in-context.
1150
1151         function preSaveTransform( $text )
1152         {
1153                 global $wgParser, $wgUser;
1154                 return $wgParser->preSaveTransform( $text, $this->mTitle, $wgUser, ParserOptions::newFromUser( $wgUser ) );
1155         }
1156
1157         /* Caching functions */
1158
1159         # checkLastModified returns true if it has taken care of all
1160         # output to the client that is necessary for this request.
1161         # (that is, it has sent a cached version of the page)
1162         function tryFileCache() {
1163                 static $called = false;
1164                 if( $called ) {
1165                         wfDebug( " tryFileCache() -- called twice!?\n" );
1166                         return;
1167                 }
1168                 $called = true;
1169                 if($this->isFileCacheable()) {
1170                         $touched = $this->mTouched;
1171                         if( $this->mTitle->getPrefixedDBkey() == wfMsg( "mainpage" ) ) {
1172                                 # Expire the main page quicker
1173                                 $expire = wfUnix2Timestamp( time() - 3600 );
1174                                 $touched = max( $expire, $touched );
1175                         }
1176                         $cache = new CacheManager( $this->mTitle );
1177                         if($cache->isFileCacheGood( $touched )) {
1178                                 global $wgOut;
1179                                 wfDebug( " tryFileCache() - about to load\n" );
1180                                 $cache->loadFromFileCache();
1181                                 return true;
1182                         } else {
1183                                 wfDebug( " tryFileCache() - starting buffer\n" );
1184                                 ob_start( array(&$cache, 'saveToFileCache' ) );
1185                         }
1186                 } else {
1187                         wfDebug( " tryFileCache() - not cacheable\n" );
1188                 }
1189         }
1190
1191         function isFileCacheable() {
1192                 global $wgUser, $wgUseFileCache, $wgShowIPinHeader;
1193                 global $action, $oldid, $diff, $redirect, $printable;
1194                 return $wgUseFileCache
1195                         and (!$wgShowIPinHeader)
1196                         and ($this->getID() != 0)
1197                         and ($wgUser->getId() == 0)
1198                         and (!$wgUser->getNewtalk())
1199                         and ($this->mTitle->getNamespace() != Namespace::getSpecial())
1200                         and ($action == "view")
1201                         and (!isset($oldid))
1202                         and (!isset($diff))
1203                         and (!isset($redirect))
1204                         and (!isset($printable))
1205                         and (!$this->mRedirectedFrom);
1206         }
1207
1208         function checkTouched() {
1209                 $id = $this->getID();
1210                 $sql = "SELECT cur_touched,cur_is_redirect FROM cur WHERE cur_id=$id";
1211                 $res = wfQuery( $sql, DB_READ, "Article::checkTouched" );
1212                 if( $s = wfFetchObject( $res ) ) {
1213                         $this->mTouched = $s->cur_touched;
1214                         return !$s->cur_is_redirect;
1215                 } else {
1216                         return false;
1217                 }
1218         }
1219
1220         /* static */ function incViewCount( $id )
1221         {
1222                 $id = intval( $id );
1223                 global $wgHitcounterUpdateFreq;
1224
1225                 if( $wgHitcounterUpdateFreq <= 1 ){ //
1226                         wfQuery("UPDATE cur SET cur_counter = cur_counter + 1 " .
1227                                 "WHERE cur_id = $id", DB_WRITE);
1228                         return;
1229                 }
1230
1231                 # Not important enough to warrant an error page in case of failure
1232                 $oldignore = wfIgnoreSQLErrors( true );
1233
1234                 wfQuery("INSERT INTO hitcounter (hc_id) VALUES ({$id})", DB_WRITE);
1235
1236                 $checkfreq = intval( $wgHitcounterUpdateFreq/25 + 1 );
1237                 if( (rand() % $checkfreq != 0) or (wfLastErrno() != 0) ){
1238                         # Most of the time (or on SQL errors), skip row count check
1239                         wfIgnoreSQLErrors( $oldignore );
1240                         return;
1241                 }
1242
1243                 $res = wfQuery("SELECT COUNT(*) as n FROM hitcounter", DB_WRITE);
1244                 $row = wfFetchObject( $res );
1245                 $rown = intval( $row->n );
1246                 if( $rown >= $wgHitcounterUpdateFreq ){
1247                         wfProfileIn( "Article::incViewCount-collect" );
1248                         $old_user_abort = ignore_user_abort( true );
1249
1250                         wfQuery("LOCK TABLES hitcounter WRITE", DB_WRITE);
1251                         wfQuery("CREATE TEMPORARY TABLE acchits TYPE=HEAP ".
1252                                 "SELECT hc_id,COUNT(*) AS hc_n FROM hitcounter ".
1253                                 "GROUP BY hc_id", DB_WRITE);
1254                         wfQuery("DELETE FROM hitcounter", DB_WRITE);
1255                         wfQuery("UNLOCK TABLES", DB_WRITE);
1256                         wfQuery("UPDATE cur,acchits SET cur_counter=cur_counter + hc_n ".
1257                                 "WHERE cur_id = hc_id", DB_WRITE);
1258                         wfQuery("DROP TABLE acchits", DB_WRITE);
1259
1260                         ignore_user_abort( $old_user_abort );
1261                         wfProfileOut( "Article::incViewCount-collect" );
1262                 }
1263                 wfIgnoreSQLErrors( $oldignore );
1264         }
1265
1266         # The onArticle*() functions are supposed to be a kind of hooks
1267         # which should be called whenever any of the specified actions
1268         # are done.
1269         #
1270         # This is a good place to put code to clear caches, for instance.
1271
1272         # This is called on page move and undelete, as well as edit
1273         /* static */ function onArticleCreate($title_obj){
1274                 global $wgEnablePersistentLC, $wgEnableParserCache, $wgUseSquid, $wgDeferredUpdateList;
1275
1276                 $titles = $title_obj->getBrokenLinksTo();
1277
1278                 # Purge squid
1279                 if ( $wgUseSquid ) {
1280                         $urls = $title_obj->getSquidURLs();
1281                         foreach ( $titles as $linkTitle ) {
1282                                 $urls[] = $linkTitle->getInternalURL();
1283                         }
1284                         $u = new SquidUpdate( $urls );
1285                         array_push( $wgDeferredUpdateList, $u );
1286                 }
1287
1288                 # Clear persistent link cache
1289                 if ( $wgEnablePersistentLC ) {
1290                         LinkCache::linksccClearBrokenLinksTo( $title_obj->getPrefixedDBkey() );
1291                 }
1292
1293                 # Clear parser cache (not really used)
1294                 if ( $wgEnableParserCache ) {
1295                         OutputPage::parsercacheClearBrokenLinksTo( $title_obj->getPrefixedDBkey() );
1296                 }
1297         }
1298
1299         /* static */ function onArticleDelete($title_obj){
1300                 global $wgEnablePersistentLC, $wgEnableParserCache;
1301                 if ( $wgEnablePersistentLC ) {
1302                         LinkCache::linksccClearLinksTo( $title_obj->getArticleID() );
1303                 }
1304                 if ( $wgEnableParserCache ) {
1305                         OutputPage::parsercacheClearLinksTo( $title_obj->getArticleID() );
1306                 }
1307         }
1308
1309         /* static */ function onArticleEdit($title_obj){
1310                 global $wgEnablePersistentLC, $wgEnableParserCache;
1311                 if ( $wgEnablePersistentLC ) {
1312                         LinkCache::linksccClearPage( $title_obj->getArticleID() );
1313                 }
1314                 if ( $wgEnableParserCache ) {
1315                         OutputPage::parsercacheClearPage( $title_obj->getArticleID(), $title_obj->getNamespace() );
1316                 }
1317         }
1318 }
1319
1320 ?>