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 require_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 )
  66         {
  67                 global $wgRequest,$wgUser,$wgOut;
  68
  69                 $fname =  "Article::getContent";
  70                 wfProfileIn( $fname );
  71
  72                 # Get variables from query string :P
  73                 $action = $wgRequest->getText( 'action', 'view' );
  74                 $section = $wgRequest->getText( 'section' );
  75                 $sectiontitle = $wgRequest->getText( 'sectiontitle' );
  76                 $oid = $wgRequest->getInt( 'oldid' );
  77
  78                 if ( 0 == $this->getID() ) {
  79                         if ( "edit" == $action ) {
  80                                 wfProfileOut( $fname );
  81                                 return ""; # was "newarticletext", now moved above the box)
  82                         }
  83                         wfProfileOut( $fname );
  84                         return wfMsg( "noarticletext" );
  85                 } else {
  86                         $this->loadContent( $noredir );
  87
  88                         # size threshold at which pages are automatically collapsed
  89                         $collapsethreshold=$wgUser->getOption( "collapsethreshold" );
  90                         if($collapsethreshold && strlen($this->mContent)>=$collapsethreshold) {
  91                                 $collapse=true;
  92                         } else {
  93                                 $collapse=false;
  94                         }
  95                         #override user pref is expansion is explicitly requested
  96                         if($wgRequest->getBool('collapse')) { $collapse=true; }
  97                         if( $wgRequest->getText( 'collapse' ) == 'false') {
  98                                 $collapse=false;
  99                         }
 100                         if($oid) { $collapse=false; }
 101                         $wgOut->setCollapse($collapse);
 102
 103                         # check if we're displaying a [[User talk:x.x.x.x]] anonymous talk page
 104                         # if so, a "This is an anonymous talk page .." message must be appended to the
 105                         # displayed page (but not during editing!).
 106                         $anontalk=false;
 107                         if( ( $this->mTitle->getNamespace() == Namespace::getTalk( Namespace::getUser()) ) &&
 108                             preg_match("/^\d{1,3}\.\d{1,3}.\d{1,3}\.\d{1,3}$/",$this->mTitle->getText()) &&
 109                             $action=="view"
 110                         ) {  $anontalk=true; }
 111
 112                         # When a page is viewed in collapsed mode, only the intro section and, for
 113                         # pages with multiple sections, a table of contents are shown.
 114                         if($collapse && $action=="view" && $section=="") {
 115                                 $rv=$this->getSection($this->mContent,0,$sectiontitle);
 116                                 $wgOut->setToc(Parser::getTocFromSource($this->mContent));
 117                                 if($anontalk) { $rv = $rv . "\n" . wfMsg("anontalkpage"); }
 118                                 wfProfileOut( $fname );
 119                                 return $rv;
 120                         }
 121                         # $section contains a section number and is used for section viewing and editing.
 122                         if($section!="") {
 123                                 if($section=="new" && $action=="edit") {
 124                                         wfProfileOut( $fname );
 125                                         return "";
 126                                 }
 127                                 $rv=$this->getSection($this->mContent,$section,$sectiontitle);
 128                                 if($anontalk) { $rv = $rv . "\n" . wfMsg("anontalkpage"); }
 129                                 wfProfileOut( $fname );
 130                                 return $rv;
 131                         }
 132                 }
 133
 134                 if($anontalk) { return $this->mContent . "\n" . wfMsg("anontalkpage"); }
 135                 wfProfileOut( $fname );
 136                 return $this->mContent;
 137
 138         }
 139
 140         # This function returns the text of a section, specified by a number ($section)
 141         # and a section title ($sectiontitle). A section is text under a heading like
 142         # == Heading == or <h1>Heading</h1>, or the first section before any such
 143         # heading (section 0).
 144         #
 145         # If a section contains subsections, these are also returned.
 146         #
 147         function getSection($text,$section,$sectiontitle)  {
 148
 149                 # strip NOWIKI etc. to avoid confusion (true-parameter causes HTML
 150                 # comments to be stripped as well)
 151                 $striparray=array();
 152                 $parser=new Parser();
 153                 $parser->mOutputType=OT_WIKI;
 154                 $striptext=$parser->strip($text, $striparray, true);
 155
 156                 # now that we can be sure that no pseudo-sections are in the source,
 157                 # split it up by section
 158                 $secs =
 159                   preg_split(
 160                   "/(^=+.*?=+|^<h[1-6].*?" . ">.*?<\/h[1-6].*?" . ">)/mi",
 161                   $striptext, -1,
 162                   PREG_SPLIT_DELIM_CAPTURE);
 163                 if($section==0) {
 164                         $rv=$secs[0];
 165                 } else {
 166                         $headline=$secs[$section*2-1];
 167                         preg_match( "/^(=+).*?=+|^<h([1-6]).*?>.*?<\/h[1-6].*?>/mi",$headline,$matches);
 168                         $hlevel=$matches[1];
 169
 170                         # translate wiki heading into level
 171                         if(strpos($hlevel,"=")!==false) {
 172                                 $hlevel=strlen($hlevel);
 173                         }
 174
 175                         $rv=$headline. $secs[$section*2];
 176                         $count=$section+1;
 177
 178                         $break=false;
 179                         while(!empty($secs[$count*2-1]) && !$break) {
 180
 181                                 $subheadline=$secs[$count*2-1];
 182                                 preg_match( "/^(=+).*?=+|^<h([1-6]).*?>.*?<\/h[1-6].*?>/mi",$subheadline,$matches);
 183                                 $subhlevel=$matches[1];
 184                                 if(strpos($subhlevel,"=")!==false) {
 185                                         $subhlevel=strlen($subhlevel);
 186                                 }
 187                                 if($subhlevel > $hlevel) {
 188                                         $rv.=$subheadline.$secs[$count*2];
 189                                 }
 190                                 if($subhlevel <= $hlevel) {
 191                                         $break=true;
 192                                 }
 193                                 $count++;
 194
 195                         }
 196                 }
 197                 # reinsert stripped tags
 198                 $rv=$parser->unstrip($rv,$striparray);
 199                 $rv=trim($rv);
 200                 return $rv;
 201
 202         }
 203
 204
 205         # Load the revision (including cur_text) into this object
 206         function loadContent( $noredir = false )
 207         {
 208                 global $wgOut, $wgMwRedir, $wgRequest;
 209
 210                 # Query variables :P
 211                 $oldid = $wgRequest->getVal( 'oldid' );
 212                 $redirect = $wgRequest->getVal( 'redirect' );
 213
 214                 if ( $this->mContentLoaded ) return;
 215                 $fname = "Article::loadContent";
 216
 217                 # Pre-fill content with error message so that if something
 218                 # fails we'll have something telling us what we intended.
 219
 220                 $t = $this->mTitle->getPrefixedText();
 221                 if ( isset( $oldid ) ) {
 222                         $oldid = IntVal( $oldid );
 223                         $t .= ",oldid={$oldid}";
 224                 }
 225                 if ( isset( $redirect ) ) {
 226                         $redirect = ($redirect == "no") ? "no" : "yes";
 227                         $t .= ",redirect={$redirect}";
 228                 }
 229                 $this->mContent = wfMsg( "missingarticle", $t );
 230
 231                 if ( ! $oldid ) {       # Retrieve current version
 232                         $id = $this->getID();
 233                         if ( 0 == $id ) return;
 234
 235                         $sql = "SELECT " .
 236                           "cur_text,cur_timestamp,cur_user,cur_counter,cur_restrictions,cur_touched " .
 237                           "FROM cur WHERE cur_id={$id}";
 238                         wfDebug( "$sql\n" );
 239                         $res = wfQuery( $sql, DB_READ, $fname );
 240                         if ( 0 == wfNumRows( $res ) ) {
 241                                 return;
 242                         }
 243
 244                         $s = wfFetchObject( $res );
 245                         # If we got a redirect, follow it (unless we've been told
 246                         # not to by either the function parameter or the query
 247                         if ( ( "no" != $redirect ) && ( false == $noredir ) &&
 248                           ( $wgMwRedir->matchStart( $s->cur_text ) ) ) {
 249                                 if ( preg_match( "/\\[\\[([^\\]\\|]+)[\\]\\|]/",
 250                                   $s->cur_text, $m ) ) {
 251                                         $rt = Title::newFromText( $m[1] );
 252                                         if( $rt ) {
 253                                                 # Gotta hand redirects to special pages differently:
 254                                                 # Fill the HTTP response "Location" header and ignore
 255                                                 # the rest of the page we're on.
 256
 257                                                 if ( $rt->getInterwiki() != "" ) {
 258                                                         $wgOut->redirect( $rt->getFullURL() ) ;
 259                                                         return;
 260                                                 }
 261                                                 if ( $rt->getNamespace() == Namespace::getSpecial() ) {
 262                                                         $wgOut->redirect( $rt->getFullURL() );
 263                                                         return;
 264                                                 }
 265                                                 $rid = $rt->getArticleID();
 266                                                 if ( 0 != $rid ) {
 267                                                         $sql = "SELECT cur_text,cur_timestamp,cur_user," .
 268                                                           "cur_counter,cur_restrictions,cur_touched FROM cur WHERE cur_id={$rid}";
 269                                                         $res = wfQuery( $sql, DB_READ, $fname );
 270
 271                                                         if ( 0 != wfNumRows( $res ) ) {
 272                                                                 $this->mRedirectedFrom = $this->mTitle->getPrefixedText();
 273                                                                 $this->mTitle = $rt;
 274                                                                 $s = wfFetchObject( $res );
 275                                                         }
 276                                                 }
 277                                         }
 278                                 }
 279                         }
 280
 281                         $this->mContent = $s->cur_text;
 282                         $this->mUser = $s->cur_user;
 283                         $this->mCounter = $s->cur_counter;
 284                         $this->mTimestamp = $s->cur_timestamp;
 285                         $this->mTouched = $s->cur_touched;
 286                         $this->mTitle->mRestrictions = explode( ",", trim( $s->cur_restrictions ) );
 287                         $this->mTitle->mRestrictionsLoaded = true;
 288                         wfFreeResult( $res );
 289                 } else { # oldid set, retrieve historical version
 290                         $sql = "SELECT old_namespace,old_title,old_text,old_timestamp,old_user,old_flags FROM old " .
 291                           "WHERE old_id={$oldid}";
 292                         $res = wfQuery( $sql, DB_READ, $fname );
 293                         if ( 0 == wfNumRows( $res ) ) {
 294                                 return;
 295                         }
 296
 297                         $s = wfFetchObject( $res );
 298                         if( $this->mTitle->getNamespace() != $s->old_namespace ||
 299                                 $this->mTitle->getDBkey() != $s->old_title ) {
 300                                 $oldTitle = Title::makeTitle( $s->old_namesapce, $s->old_title );
 301                                 $this->mTitle = $oldTitle;
 302                                 $wgTitle = $oldTitle;
 303                         }
 304                         $this->mContent = Article::getRevisionText( $s );
 305                         $this->mUser = $s->old_user;
 306                         $this->mCounter = 0;
 307                         $this->mTimestamp = $s->old_timestamp;
 308                         wfFreeResult( $res );
 309                 }
 310                 $this->mContentLoaded = true;
 311                 return $this->mContent;
 312         }
 313
 314         # Gets the article text without using so many damn globals
 315         # Returns false on error
 316         function getContentWithoutUsingSoManyDamnGlobals( $oldid = 0, $noredir = false ) {
 317                 global $wgMwRedir;
 318
 319                 if ( $this->mContentLoaded ) {
 320                         return $this->mContent;
 321                 }
 322                 $this->mContent = false;
 323
 324                 $fname = "Article::loadContent";
 325
 326                 if ( ! $oldid ) {       # Retrieve current version
 327                         $id = $this->getID();
 328                         if ( 0 == $id ) {
 329                                 return false;
 330                         }
 331
 332                         $sql = "SELECT " .
 333                           "cur_text,cur_timestamp,cur_user,cur_counter,cur_restrictions,cur_touched " .
 334                           "FROM cur WHERE cur_id={$id}";
 335                         $res = wfQuery( $sql, DB_READ, $fname );
 336                         if ( 0 == wfNumRows( $res ) ) {
 337                                 return false;
 338                         }
 339
 340                         $s = wfFetchObject( $res );
 341                         # If we got a redirect, follow it (unless we've been told
 342                         # not to by either the function parameter or the query
 343                         if ( !$noredir && $wgMwRedir->matchStart( $s->cur_text ) ) {
 344                                 if ( preg_match( "/\\[\\[([^\\]\\|]+)[\\]\\|]/",
 345                                   $s->cur_text, $m ) ) {
 346                                         $rt = Title::newFromText( $m[1] );
 347                                         if( $rt &&  $rt->getInterwiki() == "" && $rt->getNamespace() != Namespace::getSpecial() ) {
 348                                                 $rid = $rt->getArticleID();
 349                                                 if ( 0 != $rid ) {
 350                                                         $sql = "SELECT cur_text,cur_timestamp,cur_user," .
 351                                                           "cur_counter,cur_restrictions,cur_touched FROM cur WHERE cur_id={$rid}";
 352                                                         $res = wfQuery( $sql, DB_READ, $fname );
 353
 354                                                         if ( 0 != wfNumRows( $res ) ) {
 355                                                                 $this->mRedirectedFrom = $this->mTitle->getPrefixedText();
 356                                                                 $this->mTitle = $rt;
 357                                                                 $s = wfFetchObject( $res );
 358                                                         }
 359                                                 }
 360                                         }
 361                                 }
 362                         }
 363
 364                         $this->mContent = $s->cur_text;
 365                         $this->mUser = $s->cur_user;
 366                         $this->mCounter = $s->cur_counter;
 367                         $this->mTimestamp = $s->cur_timestamp;
 368                         $this->mTouched = $s->cur_touched;
 369                         $this->mTitle->mRestrictions = explode( ",", trim( $s->cur_restrictions ) );
 370                         $this->mTitle->mRestrictionsLoaded = true;
 371                         wfFreeResult( $res );
 372                 } else { # oldid set, retrieve historical version
 373                         $sql = "SELECT old_text,old_timestamp,old_user,old_flags FROM old " .
 374                           "WHERE old_id={$oldid}";
 375                         $res = wfQuery( $sql, DB_READ, $fname );
 376                         if ( 0 == wfNumRows( $res ) ) {
 377                                 return false;
 378                         }
 379
 380                         $s = wfFetchObject( $res );
 381                         $this->mContent = Article::getRevisionText( $s );
 382                         $this->mUser = $s->old_user;
 383                         $this->mCounter = 0;
 384                         $this->mTimestamp = $s->old_timestamp;
 385                         wfFreeResult( $res );
 386                 }
 387                 $this->mContentLoaded = true;
 388                 return $this->mContent;
 389         }
 390
 391         function getID() {
 392                 if( $this->mTitle ) {
 393                         return $this->mTitle->getArticleID();
 394                 } else {
 395                         return 0;
 396                 }
 397         }
 398
 399         function getCount()
 400         {
 401                 if ( -1 == $this->mCounter ) {
 402                         $id = $this->getID();
 403                         $this->mCounter = wfGetSQL( "cur", "cur_counter", "cur_id={$id}" );
 404                 }
 405                 return $this->mCounter;
 406         }
 407
 408         # Would the given text make this article a "good" article (i.e.,
 409         # suitable for including in the article count)?
 410
 411         function isCountable( $text )
 412         {
 413                 global $wgUseCommaCount, $wgMwRedir;
 414
 415                 if ( 0 != $this->mTitle->getNamespace() ) { return 0; }
 416                 if ( $wgMwRedir->matchStart( $text ) ) { return 0; }
 417                 $token = ($wgUseCommaCount ? "," : "[[" );
 418                 if ( false === strstr( $text, $token ) ) { return 0; }
 419                 return 1;
 420         }
 421
 422         # Loads everything from cur except cur_text
 423         # This isn't necessary for all uses, so it's only done if needed.
 424
 425         /* private */ function loadLastEdit()
 426         {
 427                 global $wgOut;
 428                 if ( -1 != $this->mUser ) return;
 429
 430                 $sql = "SELECT cur_user,cur_user_text,cur_timestamp," .
 431                   "cur_comment,cur_minor_edit FROM cur WHERE " .
 432                   "cur_id=" . $this->getID();
 433                 $res = wfQuery( $sql, DB_READ, "Article::loadLastEdit" );
 434
 435                 if ( wfNumRows( $res ) > 0 ) {
 436                         $s = wfFetchObject( $res );
 437                         $this->mUser = $s->cur_user;
 438                         $this->mUserText = $s->cur_user_text;
 439                         $this->mTimestamp = $s->cur_timestamp;
 440                         $this->mComment = $s->cur_comment;
 441                         $this->mMinorEdit = $s->cur_minor_edit;
 442                 }
 443         }
 444
 445         function getTimestamp()
 446         {
 447                 $this->loadLastEdit();
 448                 return $this->mTimestamp;
 449         }
 450
 451         function getUser()
 452         {
 453                 $this->loadLastEdit();
 454                 return $this->mUser;
 455         }
 456
 457         function getUserText()
 458         {
 459                 $this->loadLastEdit();
 460                 return $this->mUserText;
 461         }
 462
 463         function getComment()
 464         {
 465                 $this->loadLastEdit();
 466                 return $this->mComment;
 467         }
 468
 469         function getMinorEdit()
 470         {
 471                 $this->loadLastEdit();
 472                 return $this->mMinorEdit;
 473         }
 474
 475         function getContributors($limit = 0, $offset = 0)
 476         {
 477                 $fname = "Article::getContributors";
 478
 479                 # XXX: this is expensive; cache this info somewhere.
 480
 481                 $title = $this->mTitle;
 482
 483                 $contribs = array();
 484
 485                 $sql = "SELECT old.old_user, old.old_user_text, " .
 486                        "  user.user_real_name, MAX(old.old_timestamp) as timestamp" .
 487                        " FROM old, user " .
 488                        " WHERE old.old_user = user.user_id " .
 489                        " AND old.old_namespace = " . $title->getNamespace() .
 490                        " AND old.old_title = \"" . $title->getDBkey() . "\"" .
 491                        " AND old.old_user != 0 " .
 492                        " AND old.old_user != " . $this->getUser() .
 493                        " GROUP BY old.old_user " .
 494                        " ORDER BY timestamp DESC ";
 495
 496                 if ($limit > 0) {
 497                         $sql .= " LIMIT $limit";
 498                 }
 499
 500                 $res = wfQuery($sql, DB_READ, $fname);
 501
 502                 while ( $line = wfFetchObject( $res ) ) {
 503                         $contribs[$line->old_user] =
 504                                 array($line->old_user_text, $line->user_real_name);
 505                 }
 506
 507                 # Count anonymous users
 508
 509                 $res = wfQuery("SELECT COUNT(*) AS cnt " .
 510                                " FROM old " .
 511                                " WHERE old_namespace = " . $title->getNamespace() .
 512                                " AND old_title = '" . $title->getDBkey() . "'" .
 513                                " AND old_user = 0 ", DB_READ, $fname);
 514
 515                 while ( $line = wfFetchObject( $res ) ) {
 516                         $contribs[0] = array($line->cnt, 'Anonymous');
 517                 }
 518
 519                 return $contribs;
 520         }
 521
 522         # This is the default action of the script: just view the page of
 523         # the given title.
 524
 525         function view()
 526         {
 527                 global $wgUser, $wgOut, $wgLang, $wgRequest;
 528                 global $wgLinkCache, $IP, $wgEnableParserCache;
 529
 530                 $fname = "Article::view";
 531                 wfProfileIn( $fname );
 532
 533                 # Get variables from query string :P
 534                 $oldid = $wgRequest->getVal( 'oldid' );
 535                 $diff = $wgRequest->getVal( 'diff' );
 536
 537                 $wgOut->setArticleFlag( true );
 538                 $wgOut->setRobotpolicy( "index,follow" );
 539
 540                 # If we got diff and oldid in the query, we want to see a
 541                 # diff page instead of the article.
 542
 543                 if ( !is_null( $diff ) ) {
 544                         $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
 545                         $de = new DifferenceEngine( intval($oldid), intval($diff) );
 546                         $de->showDiffPage();
 547                         wfProfileOut( $fname );
 548                         return;
 549                 }
 550
 551                 if ( !is_null( $oldid ) and $this->checkTouched() ) {
 552                         if( $wgOut->checkLastModified( $this->mTouched ) ){
 553                                 return;
 554                         } else if ( $this->tryFileCache() ) {
 555                                 # tell wgOut that output is taken care of
 556                                 $wgOut->disable();
 557                                 $this->viewUpdates();
 558                                 return;
 559                         }
 560                 }
 561
 562                 $text = $this->getContent( false ); # May change mTitle by following a redirect
 563
 564                 # Another whitelist check in case oldid or redirects are altering the title
 565                 if ( !$this->mTitle->userCanRead() ) {
 566                         $wgOut->loginToUse();
 567                         $wgOut->output();
 568                         exit;
 569                 }
 570
 571                 $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
 572
 573                 # We're looking at an old revision
 574
 575                 if ( !empty( $oldid ) ) {
 576                         $this->setOldSubtitle();
 577                         $wgOut->setRobotpolicy( "noindex,follow" );
 578                 }
 579                 if ( "" != $this->mRedirectedFrom ) {
 580                         $sk = $wgUser->getSkin();
 581                         $redir = $sk->makeKnownLink( $this->mRedirectedFrom, "",
 582                           "redirect=no" );
 583                         $s = wfMsg( "redirectedfrom", $redir );
 584                         $wgOut->setSubtitle( $s );
 585                 }
 586
 587                 $wgLinkCache->preFill( $this->mTitle );
 588
 589                 # wrap user css and user js in pre and don't parse
 590                 # XXX: use $this->mTitle->usCssJsSubpage() when php is fixed/ a workaround is found
 591                 if (
 592                         $this->mTitle->getNamespace() == Namespace::getUser() &&
 593                         preg_match("/\\/[\\w]+\\.(css|js)$/", $this->mTitle->getDBkey())
 594                 ) {
 595                         $wgOut->addWikiText( wfMsg('usercssjs'));
 596                         $wgOut->addHTML( '<pre>'.htmlspecialchars($this->mContent)."\n</pre>" );
 597                 } else if( $wgEnableParserCache && intval($wgUser->getOption( "stubthreshold" )) == 0 ){
 598                         $wgOut->addWikiText( $text, true, $this );
 599                 } else {
 600                         $wgOut->addWikiText( $text );
 601                 }
 602
 603                 # Add link titles as META keywords
 604                 $wgOut->addMetaTags() ;
 605
 606                 $this->viewUpdates();
 607                 wfProfileOut( $fname );
 608         }
 609
 610         # Theoretically we could defer these whole insert and update
 611         # functions for after display, but that's taking a big leap
 612         # of faith, and we want to be able to report database
 613         # errors at some point.
 614
 615         /* private */ function insertNewArticle( $text, $summary, $isminor, $watchthis )
 616         {
 617                 global $wgOut, $wgUser, $wgLinkCache, $wgMwRedir;
 618                 global $wgUseSquid, $wgDeferredUpdateList, $wgInternalServer;
 619
 620                 $fname = "Article::insertNewArticle";
 621
 622                 $this->mCountAdjustment = $this->isCountable( $text );
 623
 624                 $ns = $this->mTitle->getNamespace();
 625                 $ttl = $this->mTitle->getDBkey();
 626                 $text = $this->preSaveTransform( $text );
 627                 if ( $wgMwRedir->matchStart( $text ) ) { $redir = 1; }
 628                 else { $redir = 0; }
 629
 630                 $now = wfTimestampNow();
 631                 $won = wfInvertTimestamp( $now );
 632                 wfSeedRandom();
 633                 $rand = number_format( mt_rand() / mt_getrandmax(), 12, ".", "" );
 634                 $isminor = ( $isminor && $wgUser->getID() ) ? 1 : 0;
 635                 $sql = "INSERT INTO cur (cur_namespace,cur_title,cur_text," .
 636                   "cur_comment,cur_user,cur_timestamp,cur_minor_edit,cur_counter," .
 637                   "cur_restrictions,cur_user_text,cur_is_redirect," .
 638                   "cur_is_new,cur_random,cur_touched,inverse_timestamp) VALUES ({$ns},'" . wfStrencode( $ttl ) . "', '" .
 639                   wfStrencode( $text ) . "', '" .
 640                   wfStrencode( $summary ) . "', '" .
 641                   $wgUser->getID() . "', '{$now}', " .
 642                   $isminor . ", 0, '', '" .
 643                   wfStrencode( $wgUser->getName() ) . "', $redir, 1, $rand, '{$now}', '{$won}')";
 644                 $res = wfQuery( $sql, DB_WRITE, $fname );
 645
 646                 $newid = wfInsertId();
 647                 $this->mTitle->resetArticleID( $newid );
 648
 649                 Article::onArticleCreate( $this->mTitle );
 650                 RecentChange::notifyNew( $now, $this->mTitle, $isminor, $wgUser, $summary );
 651
 652                 if ($watchthis) {
 653                         if(!$this->mTitle->userIsWatching()) $this->watch();
 654                 } else {
 655                         if ( $this->mTitle->userIsWatching() ) {
 656                                 $this->unwatch();
 657                         }
 658                 }
 659
 660                 # The talk page isn't in the regular link tables, so we need to update manually:
 661                 $talkns = $ns ^ 1; # talk -> normal; normal -> talk
 662                 $sql = "UPDATE cur set cur_touched='$now' WHERE cur_namespace=$talkns AND cur_title='" . wfStrencode( $ttl ) . "'";
 663                 wfQuery( $sql, DB_WRITE );
 664
 665                 # standard deferred updates
 666                 $this->editUpdates( $text );
 667
 668                 $this->showArticle( $text, wfMsg( "newarticle" ) );
 669         }
 670
 671
 672         /* Side effects: loads last edit */
 673         function getTextOfLastEditWithSectionReplacedOrAdded($section, $text, $summary = ""){
 674                 $this->loadLastEdit();
 675                 $oldtext = $this->getContent( true );
 676                 if ($section != "") {
 677                         if($section=="new") {
 678                                 if($summary) $subject="== {$summary} ==\n\n";
 679                                 $text=$oldtext."\n\n".$subject.$text;
 680                         } else {
 681
 682                                 # strip NOWIKI etc. to avoid confusion (true-parameter causes HTML
 683                                 # comments to be stripped as well)
 684                                 $striparray=array();
 685                                 $parser=new Parser();
 686                                 $parser->mOutputType=OT_WIKI;
 687                                 $oldtext=$parser->strip($oldtext, $striparray, true);
 688
 689                                 # now that we can be sure that no pseudo-sections are in the source,
 690                                 # split it up
 691                                 # Unfortunately we can't simply do a preg_replace because that might
 692                                 # replace the wrong section, so we have to use the section counter instead
 693                                 $secs=preg_split("/(^=+.*?=+|^<h[1-6].*?" . ">.*?<\/h[1-6].*?" . ">)/mi",
 694                                   $oldtext,-1,PREG_SPLIT_DELIM_CAPTURE);
 695                                 $secs[$section*2]=$text."\n\n"; // replace with edited
 696
 697                                 # section 0 is top (intro) section
 698                                 if($section!=0) {
 699
 700                                         # headline of old section - we need to go through this section
 701                                         # to determine if there are any subsections that now need to
 702                                         # be erased, as the mother section has been replaced with
 703                                         # the text of all subsections.
 704                                         $headline=$secs[$section*2-1];
 705                                         preg_match( "/^(=+).*?=+|^<h([1-6]).*?>.*?<\/h[1-6].*?>/mi",$headline,$matches);
 706                                         $hlevel=$matches[1];
 707
 708                                         # determine headline level for wikimarkup headings
 709                                         if(strpos($hlevel,"=")!==false) {
 710                                                 $hlevel=strlen($hlevel);
 711                                         }
 712
 713                                         $secs[$section*2-1]=""; // erase old headline
 714                                         $count=$section+1;
 715                                         $break=false;
 716                                         while(!empty($secs[$count*2-1]) && !$break) {
 717
 718                                                 $subheadline=$secs[$count*2-1];
 719                                                 preg_match(
 720                                                  "/^(=+).*?=+|^<h([1-6]).*?>.*?<\/h[1-6].*?>/mi",$subheadline,$matches);
 721                                                 $subhlevel=$matches[1];
 722                                                 if(strpos($subhlevel,"=")!==false) {
 723                                                         $subhlevel=strlen($subhlevel);
 724                                                 }
 725                                                 if($subhlevel > $hlevel) {
 726                                                         // erase old subsections
 727                                                         $secs[$count*2-1]="";
 728                                                         $secs[$count*2]="";
 729                                                 }
 730                                                 if($subhlevel <= $hlevel) {
 731                                                         $break=true;
 732                                                 }
 733                                                 $count++;
 734
 735                                         }
 736
 737                                 }
 738                                 $text=join("",$secs);
 739                                 # reinsert the stuff that we stripped out earlier
 740                                 $text=$parser->unstrip($text,$striparray);
 741                         }
 742
 743                 }
 744                 return $text;
 745         }
 746
 747         function updateArticle( $text, $summary, $minor, $watchthis, $forceBot = false )
 748         {
 749                 global $wgOut, $wgUser, $wgLinkCache;
 750                 global $wgDBtransactions, $wgMwRedir;
 751                 global $wgUseSquid, $wgInternalServer;
 752                 $fname = "Article::updateArticle";
 753
 754                 if ( $this->mMinorEdit ) { $me1 = 1; } else { $me1 = 0; }
 755                 if ( $minor && $wgUser->getID() ) { $me2 = 1; } else { $me2 = 0; }
 756                 if ( preg_match( "/^((" . $wgMwRedir->getBaseRegex() . ")[^\\n]+)/i", $text, $m ) ) {
 757                         $redir = 1;
 758                         $text = $m[1] . "\n"; # Remove all content but redirect
 759                 }
 760                 else { $redir = 0; }
 761
 762                 $text = $this->preSaveTransform( $text );
 763
 764                 # Update article, but only if changed.
 765
 766                 if( $wgDBtransactions ) {
 767                         $sql = "BEGIN";
 768                         wfQuery( $sql, DB_WRITE );
 769                 }
 770                 $oldtext = $this->getContent( true );
 771
 772                 if ( 0 != strcmp( $text, $oldtext ) ) {
 773                         $this->mCountAdjustment = $this->isCountable( $text )
 774                           - $this->isCountable( $oldtext );
 775
 776                         $now = wfTimestampNow();
 777                         $won = wfInvertTimestamp( $now );
 778                         $sql = "UPDATE cur SET cur_text='" . wfStrencode( $text ) .
 779                           "',cur_comment='" .  wfStrencode( $summary ) .
 780                           "',cur_minor_edit={$me2}, cur_user=" . $wgUser->getID() .
 781                           ",cur_timestamp='{$now}',cur_user_text='" .
 782                           wfStrencode( $wgUser->getName() ) .
 783                           "',cur_is_redirect={$redir}, cur_is_new=0, cur_touched='{$now}', inverse_timestamp='{$won}' " .
 784                           "WHERE cur_id=" . $this->getID() .
 785                           " AND cur_timestamp='" . $this->getTimestamp() . "'";
 786                         $res = wfQuery( $sql, DB_WRITE, $fname );
 787
 788                         if( wfAffectedRows() == 0 ) {
 789                                 /* Belated edit conflict! Run away!! */
 790                                 return false;
 791                         }
 792
 793                         # This overwrites $oldtext if revision compression is on
 794                         $flags = Article::compressRevisionText( $oldtext );
 795
 796                         $sql = "INSERT INTO old (old_namespace,old_title,old_text," .
 797                           "old_comment,old_user,old_user_text,old_timestamp," .
 798                           "old_minor_edit,inverse_timestamp,old_flags) VALUES (" .
 799                           $this->mTitle->getNamespace() . ", '" .
 800                           wfStrencode( $this->mTitle->getDBkey() ) . "', '" .
 801                           wfStrencode( $oldtext ) . "', '" .
 802                           wfStrencode( $this->getComment() ) . "', " .
 803                           $this->getUser() . ", '" .
 804                           wfStrencode( $this->getUserText() ) . "', '" .
 805                           $this->getTimestamp() . "', " . $me1 . ", '" .
 806                           wfInvertTimestamp( $this->getTimestamp() ) . "','$flags')";
 807                         $res = wfQuery( $sql, DB_WRITE, $fname );
 808                         $oldid = wfInsertID( $res );
 809
 810                         $bot = (int)($wgUser->isBot() || $forceBot);
 811                         RecentChange::notifyEdit( $now, $this->mTitle, $me2, $wgUser, $summary,
 812                                 $oldid, $this->getTimestamp(), $bot );
 813                         Article::onArticleEdit( $this->mTitle );
 814                 }
 815
 816                 if( $wgDBtransactions ) {
 817                         $sql = "COMMIT";
 818                         wfQuery( $sql, DB_WRITE );
 819                 }
 820
 821                 if ($watchthis) {
 822                         if (!$this->mTitle->userIsWatching()) $this->watch();
 823                 } else {
 824                         if ( $this->mTitle->userIsWatching() ) {
 825                                 $this->unwatch();
 826                         }
 827                 }
 828                 # standard deferred updates
 829                 $this->editUpdates( $text );
 830
 831
 832                 $urls = array();
 833                 # Template namespace
 834                 # Purge all articles linking here
 835                 if ( $this->mTitle->getNamespace() == NS_TEMPLATE) {
 836                         $titles = $this->mTitle->getLinksTo();
 837                         Title::touchArray( $titles );
 838                         if ( $wgUseSquid ) {
 839                                 foreach ( $titles as $title ) {
 840                                         $urls[] = $title->getInternalURL();
 841                                 }
 842                         }
 843                 }
 844
 845                 # Squid updates
 846                 if ( $wgUseSquid ) {
 847                         $urls = array_merge( $urls, $this->mTitle->getSquidURLs() );
 848                         $u = new SquidUpdate( $urls );
 849                         $u->doUpdate();
 850                 }
 851
 852                 $this->showArticle( $text, wfMsg( "updated" ) );
 853                 return true;
 854         }
 855
 856         # After we've either updated or inserted the article, update
 857         # the link tables and redirect to the new page.
 858
 859         function showArticle( $text, $subtitle )
 860         {
 861                 global $wgOut, $wgUser, $wgLinkCache;
 862                 global $wgMwRedir;
 863
 864                 $wgLinkCache = new LinkCache();
 865
 866                 # Get old version of link table to allow incremental link updates
 867                 $wgLinkCache->preFill( $this->mTitle );
 868                 $wgLinkCache->clear();
 869
 870                 # Now update the link cache by parsing the text
 871                 $wgOut = new OutputPage();
 872                 $wgOut->addWikiText( $text );
 873
 874                 if( $wgMwRedir->matchStart( $text ) )
 875                         $r = "redirect=no";
 876                 else
 877                         $r = "";
 878                 $wgOut->redirect( $this->mTitle->getFullURL( $r ) );
 879         }
 880
 881         # Add this page to my watchlist
 882
 883         function watch( $add = true )
 884         {
 885                 global $wgUser, $wgOut, $wgLang;
 886                 global $wgDeferredUpdateList;
 887
 888                 if ( 0 == $wgUser->getID() ) {
 889                         $wgOut->errorpage( "watchnologin", "watchnologintext" );
 890                         return;
 891                 }
 892                 if ( wfReadOnly() ) {
 893                         $wgOut->readOnlyPage();
 894                         return;
 895                 }
 896                 if( $add )
 897                         $wgUser->addWatch( $this->mTitle );
 898                 else
 899                         $wgUser->removeWatch( $this->mTitle );
 900
 901                 $wgOut->setPagetitle( wfMsg( $add ? "addedwatch" : "removedwatch" ) );
 902                 $wgOut->setRobotpolicy( "noindex,follow" );
 903
 904                 $sk = $wgUser->getSkin() ;
 905                 $link = $this->mTitle->getPrefixedText();
 906
 907                 if($add)
 908                         $text = wfMsg( "addedwatchtext", $link );
 909                 else
 910                         $text = wfMsg( "removedwatchtext", $link );
 911                 $wgOut->addWikiText( $text );
 912
 913                 $up = new UserUpdate();
 914                 array_push( $wgDeferredUpdateList, $up );
 915
 916                 $wgOut->returnToMain( false );
 917         }
 918
 919         function unwatch()
 920         {
 921                 $this->watch( false );
 922         }
 923
 924         function protect( $limit = "sysop" )
 925         {
 926                 global $wgUser, $wgOut, $wgRequest;
 927
 928                 if ( ! $wgUser->isSysop() ) {
 929                         $wgOut->sysopRequired();
 930                         return;
 931                 }
 932                 if ( wfReadOnly() ) {
 933                         $wgOut->readOnlyPage();
 934                         return;
 935                 }
 936                 $id = $this->mTitle->getArticleID();
 937                 if ( 0 == $id ) {
 938                         $wgOut->fatalError( wfMsg( "badarticleerror" ) );
 939                         return;
 940                 }
 941
 942                 $confirm = $wgRequest->getBool( 'wpConfirmProtect' ) && $wgRequest->wasPosted();
 943                 $reason = $wgRequest->getText( 'wpReasonProtect' );
 944
 945                 if ( $confirm ) {
 946
 947         $sql = "UPDATE cur SET cur_touched='" . wfTimestampNow() . "'," .
 948                         "cur_restrictions='{$limit}' WHERE cur_id={$id}";
 949                 wfQuery( $sql, DB_WRITE, "Article::protect" );
 950
 951                 $log = new LogPage( wfMsg( "protectlogpage" ), wfMsg( "protectlogtext" ) );
 952                 if ( $limit === "" ) {
 953                                 $log->addEntry( wfMsg( "unprotectedarticle", $this->mTitle->getPrefixedText() ), $reason );
 954                 } else {
 955                                 $log->addEntry( wfMsg( "protectedarticle", $this->mTitle->getPrefixedText() ), $reason );
 956                 }
 957                 $wgOut->redirect( $this->mTitle->getFullURL() );
 958                         return;
 959                 } else {
 960                         $reason = htmlspecialchars( wfMsg( "protectreason" ) );
 961                         return $this->confirmProtect( "", $reason, $limit );
 962                 }
 963         }
 964
 965                 # Output protection confirmation dialog
 966         function confirmProtect( $par, $reason, $limit = "sysop"  )
 967         {
 968                 global $wgOut;
 969
 970                 wfDebug( "Article::confirmProtect\n" );
 971
 972                 $sub = htmlspecialchars( $this->mTitle->getPrefixedText() );
 973                 $wgOut->setRobotpolicy( "noindex,nofollow" );
 974
 975                 $check = "";
 976                 $protcom = "";
 977
 978                 if ( $limit === "" ) {
 979                         $wgOut->setSubtitle( wfMsg( "unprotectsub", $sub ) );
 980                         $wgOut->addWikiText( wfMsg( "confirmunprotecttext" ) );
 981                         $check = htmlspecialchars( wfMsg( "confirmunprotect" ) );
 982                         $protcom = htmlspecialchars( wfMsg( "unprotectcomment" ) );
 983                         $formaction = $this->mTitle->escapeLocalURL( "action=unprotect" . $par );
 984                 } else {
 985                         $wgOut->setSubtitle( wfMsg( "protectsub", $sub ) );
 986                         $wgOut->addWikiText( wfMsg( "confirmprotecttext" ) );
 987                         $check = htmlspecialchars( wfMsg( "confirmprotect" ) );
 988                         $protcom = htmlspecialchars( wfMsg( "protectcomment" ) );
 989                         $formaction = $this->mTitle->escapeLocalURL( "action=protect" . $par );
 990                 }
 991
 992                 $confirm = htmlspecialchars( wfMsg( "confirm" ) );
 993
 994                 $wgOut->addHTML( "
 995 <form id='protectconfirm' method='post' action=\"{$formaction}\">
 996         <table border='0'>
 997                 <tr>
 998                         <td align='right'>
 999                                 <label for='wpReasonProtect'>{$protcom}:</label>
1000                         </td>
1001                         <td align='left'>
1002                                 <input type='text' size='60' name='wpReasonProtect' id='wpReasonProtect' value=\"" . htmlspecialchars( $reason ) . "\" />
1003                         </td>
1004                 </tr>
1005                 <tr>
1006                         <td>&nbsp;</td>
1007                 </tr>
1008                 <tr>
1009                         <td align='right'>
1010                                 <input type='checkbox' name='wpConfirmProtect' value='1' id='wpConfirmProtect' />
1011                         </td>
1012                         <td>
1013                                 <label for='wpConfirmProtect'>{$check}</label>
1014                         </td>
1015                 </tr>
1016                 <tr>
1017                         <td>&nbsp;</td>
1018                         <td>
1019                                 <input type='submit' name='wpConfirmProtectB' value=\"{$confirm}\" />
1020                         </td>
1021                 </tr>
1022         </table>
1023 </form>\n" );
1024
1025                 $wgOut->returnToMain( false );
1026         }
1027
1028         function unprotect()
1029         {
1030                 return $this->protect( "" );
1031         }
1032
1033         # UI entry point for page deletion
1034         function delete()
1035         {
1036                 global $wgUser, $wgOut, $wgMessageCache, $wgRequest;
1037                 $fname = "Article::delete";
1038                 $confirm = $wgRequest->getBool( 'wpConfirm' ) && $wgRequest->wasPosted();
1039                 $reason = $wgRequest->getText( 'wpReason' );
1040
1041                 # This code desperately needs to be totally rewritten
1042
1043                 # Check permissions
1044                 if ( ( ! $wgUser->isSysop() ) ) {
1045                         $wgOut->sysopRequired();
1046                         return;
1047                 }
1048                 if ( wfReadOnly() ) {
1049                         $wgOut->readOnlyPage();
1050                         return;
1051                 }
1052
1053                 # Better double-check that it hasn't been deleted yet!
1054                 $wgOut->setPagetitle( wfMsg( "confirmdelete" ) );
1055                 if ( ( "" == trim( $this->mTitle->getText() ) )
1056                   or ( $this->mTitle->getArticleId() == 0 ) ) {
1057                         $wgOut->fatalError( wfMsg( "cannotdelete" ) );
1058                         return;
1059                 }
1060
1061                 if ( $confirm ) {
1062                         $this->doDelete( $reason );
1063                         return;
1064                 }
1065
1066                 # determine whether this page has earlier revisions
1067                 # and insert a warning if it does
1068                 # we select the text because it might be useful below
1069                 $ns = $this->mTitle->getNamespace();
1070                 $title = $this->mTitle->getDBkey();
1071                 $etitle = wfStrencode( $title );
1072                 $sql = "SELECT old_text,old_flags FROM old WHERE old_namespace=$ns and old_title='$etitle' ORDER BY inverse_timestamp LIMIT 1";
1073                 $res = wfQuery( $sql, DB_READ, $fname );
1074                 if( ($old=wfFetchObject($res)) && !$confirm ) {
1075                         $skin=$wgUser->getSkin();
1076                         $wgOut->addHTML("<b>".wfMsg("historywarning"));
1077                         $wgOut->addHTML( $skin->historyLink() ."</b>");
1078                 }
1079
1080                 $sql="SELECT cur_text FROM cur WHERE cur_namespace=$ns and cur_title='$etitle'";
1081                 $res=wfQuery($sql, DB_READ, $fname);
1082                 if( ($s=wfFetchObject($res))) {
1083
1084                         # if this is a mini-text, we can paste part of it into the deletion reason
1085
1086                         #if this is empty, an earlier revision may contain "useful" text
1087                         $blanked = false;
1088                         if($s->cur_text!="") {
1089                                 $text=$s->cur_text;
1090                         } else {
1091                                 if($old) {
1092                                         $text = Article::getRevisionText( $old );
1093                                         $blanked = true;
1094                                 }
1095
1096                         }
1097
1098                         $length=strlen($text);
1099
1100                         # this should not happen, since it is not possible to store an empty, new
1101                         # page. Let's insert a standard text in case it does, though
1102                         if($length == 0 && $reason === "") {
1103                                 $reason = wfMsg("exblank");
1104                         }
1105
1106                         if($length < 500 && $reason === "") {
1107
1108                                 # comment field=255, let's grep the first 150 to have some user
1109                                 # space left
1110                                 $text=substr($text,0,150);
1111                                 # let's strip out newlines and HTML tags
1112                                 $text=preg_replace("/\"/","'",$text);
1113                                 $text=preg_replace("/\</","&lt;",$text);
1114                                 $text=preg_replace("/\>/","&gt;",$text);
1115                                 $text=preg_replace("/[\n\r]/","",$text);
1116                                 if(!$blanked) {
1117                                         $reason=wfMsg("excontent"). " '".$text;
1118                                 } else {
1119                                         $reason=wfMsg("exbeforeblank") . " '".$text;
1120                                 }
1121                                 if($length>150) { $reason .= "..."; } # we've only pasted part of the text
1122                                 $reason.="'";
1123                         }
1124                 }
1125
1126                 return $this->confirmDelete( "", $reason );
1127         }
1128
1129         # Output deletion confirmation dialog
1130         function confirmDelete( $par, $reason )
1131         {
1132                 global $wgOut;
1133
1134                 wfDebug( "Article::confirmDelete\n" );
1135
1136                 $sub = htmlspecialchars( $this->mTitle->getPrefixedText() );
1137                 $wgOut->setSubtitle( wfMsg( "deletesub", $sub ) );
1138                 $wgOut->setRobotpolicy( "noindex,nofollow" );
1139                 $wgOut->addWikiText( wfMsg( "confirmdeletetext" ) );
1140
1141                 $formaction = $this->mTitle->escapeLocalURL( "action=delete" . $par );
1142
1143                 $confirm = htmlspecialchars( wfMsg( "confirm" ) );
1144                 $check = htmlspecialchars( wfMsg( "confirmcheck" ) );
1145                 $delcom = htmlspecialchars( wfMsg( "deletecomment" ) );
1146
1147                 $wgOut->addHTML( "
1148 <form id='deleteconfirm' method='post' action=\"{$formaction}\">
1149         <table border='0'>
1150                 <tr>
1151                         <td align='right'>
1152                                 <label for='wpReason'>{$delcom}:</label>
1153                         </td>
1154                         <td align='left'>
1155                                 <input type='text' size='60' name='wpReason' id='wpReason' value=\"" . htmlspecialchars( $reason ) . "\" />
1156                         </td>
1157                 </tr>
1158                 <tr>
1159                         <td>&nbsp;</td>
1160                 </tr>
1161                 <tr>
1162                         <td align='right'>
1163                                 <input type='checkbox' name='wpConfirm' value='1' id='wpConfirm' />
1164                         </td>
1165                         <td>
1166                                 <label for='wpConfirm'>{$check}</label>
1167                         </td>
1168                 </tr>
1169                 <tr>
1170                         <td>&nbsp;</td>
1171                         <td>
1172                                 <input type='submit' name='wpConfirmB' value=\"{$confirm}\" />
1173                         </td>
1174                 </tr>
1175         </table>
1176 </form>\n" );
1177
1178                 $wgOut->returnToMain( false );
1179         }
1180
1181         # Perform a deletion and output success or failure messages
1182         function doDelete( $reason )
1183         {
1184                 global $wgOut, $wgUser, $wgLang;
1185                 $fname = "Article::doDelete";
1186                 wfDebug( "$fname\n" );
1187
1188                 if ( $this->doDeleteArticle( $reason ) ) {
1189                         $deleted = $this->mTitle->getPrefixedText();
1190
1191                         $wgOut->setPagetitle( wfMsg( "actioncomplete" ) );
1192                         $wgOut->setRobotpolicy( "noindex,nofollow" );
1193
1194                         $sk = $wgUser->getSkin();
1195                         $loglink = $sk->makeKnownLink( $wgLang->getNsText(
1196                           Namespace::getWikipedia() ) .
1197                           ":" . wfMsg( "dellogpage" ), wfMsg( "deletionlog" ) );
1198
1199                         $text = wfMsg( "deletedtext", $deleted, $loglink );
1200
1201                         $wgOut->addHTML( "<p>" . $text . "</p>\n" );
1202                         $wgOut->returnToMain( false );
1203                 } else {
1204                         $wgOut->fatalError( wfMsg( "cannotdelete" ) );
1205                 }
1206         }
1207
1208         # Back-end article deletion
1209         # Deletes the article with database consistency, writes logs, purges caches
1210         # Returns success
1211         function doDeleteArticle( $reason )
1212         {
1213                 global $wgUser, $wgLang;
1214                 global  $wgUseSquid, $wgDeferredUpdateList, $wgInternalServer;
1215
1216                 $fname = "Article::doDeleteArticle";
1217                 wfDebug( "$fname\n" );
1218
1219                 $ns = $this->mTitle->getNamespace();
1220                 $t = wfStrencode( $this->mTitle->getDBkey() );
1221                 $id = $this->mTitle->getArticleID();
1222
1223                 if ( "" == $t || $id == 0 ) {
1224                         return false;
1225                 }
1226
1227                 $u = new SiteStatsUpdate( 0, 1, -$this->isCountable( $this->getContent( true ) ) );
1228                 array_push( $wgDeferredUpdateList, $u );
1229
1230                 $linksTo = $this->mTitle->getLinksTo();
1231
1232                 # Squid purging
1233                 if ( $wgUseSquid ) {
1234                         $urls = array(
1235                                 $this->mTitle->getInternalURL(),
1236                                 $this->mTitle->getInternalURL( "history" )
1237                         );
1238                         foreach ( $linksTo as $linkTo ) {
1239                                 $urls[] = $linkTo->getInternalURL();
1240                         }
1241
1242                         $u = new SquidUpdate( $urls );
1243                         array_push( $wgDeferredUpdateList, $u );
1244
1245                 }
1246
1247                 # Client and file cache invalidation
1248                 Title::touchArray( $linksTo );
1249
1250                 # Move article and history to the "archive" table
1251                 $sql = "INSERT INTO archive (ar_namespace,ar_title,ar_text," .
1252                   "ar_comment,ar_user,ar_user_text,ar_timestamp,ar_minor_edit," .
1253                   "ar_flags) SELECT cur_namespace,cur_title,cur_text,cur_comment," .
1254                   "cur_user,cur_user_text,cur_timestamp,cur_minor_edit,0 FROM cur " .
1255                   "WHERE cur_namespace={$ns} AND cur_title='{$t}'";
1256                 wfQuery( $sql, DB_WRITE, $fname );
1257
1258                 $sql = "INSERT INTO archive (ar_namespace,ar_title,ar_text," .
1259                   "ar_comment,ar_user,ar_user_text,ar_timestamp,ar_minor_edit," .
1260                   "ar_flags) SELECT old_namespace,old_title,old_text,old_comment," .
1261                   "old_user,old_user_text,old_timestamp,old_minor_edit,old_flags " .
1262                   "FROM old WHERE old_namespace={$ns} AND old_title='{$t}'";
1263                 wfQuery( $sql, DB_WRITE, $fname );
1264
1265                 # Now that it's safely backed up, delete it
1266
1267                 $sql = "DELETE FROM cur WHERE cur_namespace={$ns} AND " .
1268                   "cur_title='{$t}'";
1269                 wfQuery( $sql, DB_WRITE, $fname );
1270
1271                 $sql = "DELETE FROM old WHERE old_namespace={$ns} AND " .
1272                   "old_title='{$t}'";
1273                 wfQuery( $sql, DB_WRITE, $fname );
1274
1275                 $sql = "DELETE FROM recentchanges WHERE rc_namespace={$ns} AND " .
1276                   "rc_title='{$t}'";
1277                 wfQuery( $sql, DB_WRITE, $fname );
1278
1279                 # Finally, clean up the link tables
1280                 $t = wfStrencode( $this->mTitle->getPrefixedDBkey() );
1281
1282                 Article::onArticleDelete( $this->mTitle );
1283
1284                 $sql = "INSERT INTO brokenlinks (bl_from,bl_to) VALUES ";
1285                 $first = true;
1286
1287                 foreach ( $linksTo as $titleObj ) {
1288                         if ( ! $first ) { $sql .= ","; }
1289                         $first = false;
1290                         # Get article ID. Efficient because it was loaded into the cache by getLinksTo().
1291                         $linkID = $titleObj->getArticleID();
1292                         $sql .= "({$linkID},'{$t}')";
1293                 }
1294                 if ( ! $first ) {
1295                         wfQuery( $sql, DB_WRITE, $fname );
1296                 }
1297
1298                 $sql = "DELETE FROM links WHERE l_to={$id}";
1299                 wfQuery( $sql, DB_WRITE, $fname );
1300
1301                 $sql = "DELETE FROM links WHERE l_from={$id}";
1302                 wfQuery( $sql, DB_WRITE, $fname );
1303
1304                 $sql = "DELETE FROM imagelinks WHERE il_from={$id}";
1305                 wfQuery( $sql, DB_WRITE, $fname );
1306
1307                 $sql = "DELETE FROM brokenlinks WHERE bl_from={$id}";
1308                 wfQuery( $sql, DB_WRITE, $fname );
1309
1310                 $log = new LogPage( wfMsg( "dellogpage" ), wfMsg( "dellogpagetext" ) );
1311                 $art = $this->mTitle->getPrefixedText();
1312                 $log->addEntry( wfMsg( "deletedarticle", $art ), $reason );
1313
1314                 # Clear the cached article id so the interface doesn't act like we exist
1315                 $this->mTitle->resetArticleID( 0 );
1316                 $this->mTitle->mArticleID = 0;
1317                 return true;
1318         }
1319
1320         function rollback()
1321         {
1322                 global $wgUser, $wgLang, $wgOut, $wgRequest;
1323
1324                 if ( ! $wgUser->isSysop() ) {
1325                         $wgOut->sysopRequired();
1326                         return;
1327                 }
1328                 if ( wfReadOnly() ) {
1329                         $wgOut->readOnlyPage( $this->getContent( true ) );
1330                         return;
1331                 }
1332
1333                 # Enhanced rollback, marks edits rc_bot=1
1334                 $bot = $wgRequest->getBool( 'bot' );
1335
1336                 # Replace all this user's current edits with the next one down
1337                 $tt = wfStrencode( $this->mTitle->getDBKey() );
1338                 $n = $this->mTitle->getNamespace();
1339
1340                 # Get the last editor
1341                 $sql = "SELECT cur_id,cur_user,cur_user_text,cur_comment FROM cur WHERE cur_title='{$tt}' AND cur_namespace={$n}";
1342                 $res = wfQuery( $sql, DB_READ );
1343                 if( ($x = wfNumRows( $res )) != 1 ) {
1344                         # Something wrong
1345                         $wgOut->addHTML( wfMsg( "notanarticle" ) );
1346                         return;
1347                 }
1348                 $s = wfFetchObject( $res );
1349                 $ut = wfStrencode( $s->cur_user_text );
1350                 $uid = $s->cur_user;
1351                 $pid = $s->cur_id;
1352
1353                 $from = str_replace( '_', ' ', $wgRequest->getVal( "from" ) );
1354                 if( $from != $s->cur_user_text ) {
1355                         $wgOut->setPageTitle(wfmsg("rollbackfailed"));
1356                         $wgOut->addWikiText( wfMsg( "alreadyrolled",
1357                                 htmlspecialchars( $this->mTitle->getPrefixedText()),
1358                                 htmlspecialchars( $from ),
1359                                 htmlspecialchars( $s->cur_user_text ) ) );
1360                         if($s->cur_comment != "") {
1361                                 $wgOut->addHTML(
1362                                         wfMsg("editcomment",
1363                                         htmlspecialchars( $s->cur_comment ) ) );
1364                         }
1365                         return;
1366                 }
1367
1368                 # Get the last edit not by this guy
1369                 $sql = "SELECT old_text,old_user,old_user_text,old_timestamp,old_flags
1370                 FROM old USE INDEX (name_title_timestamp)
1371                 WHERE old_namespace={$n} AND old_title='{$tt}'
1372                 AND (old_user <> {$uid} OR old_user_text <> '{$ut}')
1373                 ORDER BY inverse_timestamp LIMIT 1";
1374                 $res = wfQuery( $sql, DB_READ );
1375                 if( wfNumRows( $res ) != 1 ) {
1376                         # Something wrong
1377                         $wgOut->setPageTitle(wfMsg("rollbackfailed"));
1378                         $wgOut->addHTML( wfMsg( "cantrollback" ) );
1379                         return;
1380                 }
1381                 $s = wfFetchObject( $res );
1382
1383                 if ( $bot ) {
1384                         # Mark all reverted edits as bot
1385                         $sql = "UPDATE recentchanges SET rc_bot=1 WHERE
1386                                 rc_cur_id=$pid AND rc_user=$uid AND rc_timestamp > '{$s->old_timestamp}'";
1387                         wfQuery( $sql, DB_WRITE, $fname );
1388                 }
1389
1390                 # Save it!
1391                 $newcomment = wfMsg( "revertpage", $s->old_user_text, $from );
1392                 $wgOut->setPagetitle( wfMsg( "actioncomplete" ) );
1393                 $wgOut->setRobotpolicy( "noindex,nofollow" );
1394                 $wgOut->addHTML( "<h2>" . $newcomment . "</h2>\n<hr />\n" );
1395                 $this->updateArticle( Article::getRevisionText( $s ), $newcomment, 1, $this->mTitle->userIsWatching(), $bot );
1396                 Article::onArticleEdit( $this->mTitle );
1397                 $wgOut->returnToMain( false );
1398         }
1399
1400
1401         # Do standard deferred updates after page view
1402
1403         /* private */ function viewUpdates()
1404         {
1405                 global $wgDeferredUpdateList;
1406                 if ( 0 != $this->getID() ) {
1407                         global $wgDisableCounters;
1408                         if( !$wgDisableCounters ) {
1409                                 Article::incViewCount( $this->getID() );
1410                                 $u = new SiteStatsUpdate( 1, 0, 0 );
1411                                 array_push( $wgDeferredUpdateList, $u );
1412                         }
1413                         $u = new UserTalkUpdate( 0, $this->mTitle->getNamespace(),
1414                           $this->mTitle->getDBkey() );
1415                         array_push( $wgDeferredUpdateList, $u );
1416                 }
1417         }
1418
1419         # Do standard deferred updates after page edit.
1420         # Every 1000th edit, prune the recent changes table.
1421
1422         /* private */ function editUpdates( $text )
1423         {
1424                 global $wgDeferredUpdateList, $wgDBname, $wgMemc;
1425                 global $wgMessageCache;
1426
1427                 wfSeedRandom();
1428                 if ( 0 == mt_rand( 0, 999 ) ) {
1429                         $cutoff = wfUnix2Timestamp( time() - ( 7 * 86400 ) );
1430                         $sql = "DELETE FROM recentchanges WHERE rc_timestamp < '{$cutoff}'";
1431                         wfQuery( $sql, DB_WRITE );
1432                 }
1433                 $id = $this->getID();
1434                 $title = $this->mTitle->getPrefixedDBkey();
1435                 $shortTitle = $this->mTitle->getDBkey();
1436
1437                 $adj = $this->mCountAdjustment;
1438
1439                 if ( 0 != $id ) {
1440                         $u = new LinksUpdate( $id, $title );
1441                         array_push( $wgDeferredUpdateList, $u );
1442                         $u = new SiteStatsUpdate( 0, 1, $adj );
1443                         array_push( $wgDeferredUpdateList, $u );
1444                         $u = new SearchUpdate( $id, $title, $text );
1445                         array_push( $wgDeferredUpdateList, $u );
1446
1447                         $u = new UserTalkUpdate( 1, $this->mTitle->getNamespace(), $shortTitle );
1448                         array_push( $wgDeferredUpdateList, $u );
1449
1450                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
1451                                 $wgMessageCache->replace( $shortTitle, $text );
1452                         }
1453                 }
1454         }
1455
1456         /* private */ function setOldSubtitle()
1457         {
1458                 global $wgLang, $wgOut;
1459
1460                 $td = $wgLang->timeanddate( $this->mTimestamp, true );
1461                 $r = wfMsg( "revisionasof", $td );
1462                 $wgOut->setSubtitle( "({$r})" );
1463         }
1464
1465         # This function is called right before saving the wikitext,
1466         # so we can do things like signatures and links-in-context.
1467
1468         function preSaveTransform( $text )
1469         {
1470                 global $wgParser, $wgUser;
1471                 return $wgParser->preSaveTransform( $text, $this->mTitle, $wgUser, ParserOptions::newFromUser( $wgUser ) );
1472         }
1473
1474         /* Caching functions */
1475
1476         # checkLastModified returns true if it has taken care of all
1477         # output to the client that is necessary for this request.
1478         # (that is, it has sent a cached version of the page)
1479         function tryFileCache() {
1480                 static $called = false;
1481                 if( $called ) {
1482                         wfDebug( " tryFileCache() -- called twice!?\n" );
1483                         return;
1484                 }
1485                 $called = true;
1486                 if($this->isFileCacheable()) {
1487                         $touched = $this->mTouched;
1488                         if( $this->mTitle->getPrefixedDBkey() == wfMsg( "mainpage" ) ) {
1489                                 # Expire the main page quicker
1490                                 $expire = wfUnix2Timestamp( time() - 3600 );
1491                                 $touched = max( $expire, $touched );
1492                         }
1493                         $cache = new CacheManager( $this->mTitle );
1494                         if($cache->isFileCacheGood( $touched )) {
1495                                 global $wgOut;
1496                                 wfDebug( " tryFileCache() - about to load\n" );
1497                                 $cache->loadFromFileCache();
1498                                 return true;
1499                         } else {
1500                                 wfDebug( " tryFileCache() - starting buffer\n" );
1501                                 ob_start( array(&$cache, 'saveToFileCache' ) );
1502                         }
1503                 } else {
1504                         wfDebug( " tryFileCache() - not cacheable\n" );
1505                 }
1506         }
1507
1508         function isFileCacheable() {
1509                 global $wgUser, $wgUseFileCache, $wgShowIPinHeader, $wgRequest;
1510                 extract( $wgRequest->getValues( 'action', 'oldid', 'diff', 'redirect', 'printable' ) );
1511
1512                 return $wgUseFileCache
1513                         and (!$wgShowIPinHeader)
1514                         and ($this->getID() != 0)
1515                         and ($wgUser->getId() == 0)
1516                         and (!$wgUser->getNewtalk())
1517                         and ($this->mTitle->getNamespace() != Namespace::getSpecial())
1518                         and ($action == "view")
1519                         and (!isset($oldid))
1520                         and (!isset($diff))
1521                         and (!isset($redirect))
1522                         and (!isset($printable))
1523                         and (!$this->mRedirectedFrom);
1524         }
1525
1526         function checkTouched() {
1527                 $id = $this->getID();
1528                 $sql = "SELECT cur_touched,cur_is_redirect FROM cur WHERE cur_id=$id";
1529                 $res = wfQuery( $sql, DB_READ, "Article::checkTouched" );
1530                 if( $s = wfFetchObject( $res ) ) {
1531                         $this->mTouched = $s->cur_touched;
1532                         return !$s->cur_is_redirect;
1533                 } else {
1534                         return false;
1535                 }
1536         }
1537
1538         /* static */ function incViewCount( $id )
1539         {
1540                 $id = intval( $id );
1541                 global $wgHitcounterUpdateFreq;
1542
1543                 if( $wgHitcounterUpdateFreq <= 1 ){ //
1544                         wfQuery("UPDATE cur SET cur_counter = cur_counter + 1 " .
1545                                 "WHERE cur_id = $id", DB_WRITE);
1546                         return;
1547                 }
1548
1549                 # Not important enough to warrant an error page in case of failure
1550                 $oldignore = wfIgnoreSQLErrors( true );
1551
1552                 wfQuery("INSERT INTO hitcounter (hc_id) VALUES ({$id})", DB_WRITE);
1553
1554                 $checkfreq = intval( $wgHitcounterUpdateFreq/25 + 1 );
1555                 if( (rand() % $checkfreq != 0) or (wfLastErrno() != 0) ){
1556                         # Most of the time (or on SQL errors), skip row count check
1557                         wfIgnoreSQLErrors( $oldignore );
1558                         return;
1559                 }
1560
1561                 $res = wfQuery("SELECT COUNT(*) as n FROM hitcounter", DB_WRITE);
1562                 $row = wfFetchObject( $res );
1563                 $rown = intval( $row->n );
1564                 if( $rown >= $wgHitcounterUpdateFreq ){
1565                         wfProfileIn( "Article::incViewCount-collect" );
1566                         $old_user_abort = ignore_user_abort( true );
1567
1568                         wfQuery("LOCK TABLES hitcounter WRITE", DB_WRITE);
1569                         wfQuery("CREATE TEMPORARY TABLE acchits TYPE=HEAP ".
1570                                 "SELECT hc_id,COUNT(*) AS hc_n FROM hitcounter ".
1571                                 "GROUP BY hc_id", DB_WRITE);
1572                         wfQuery("DELETE FROM hitcounter", DB_WRITE);
1573                         wfQuery("UNLOCK TABLES", DB_WRITE);
1574                         wfQuery("UPDATE cur,acchits SET cur_counter=cur_counter + hc_n ".
1575                                 "WHERE cur_id = hc_id", DB_WRITE);
1576                         wfQuery("DROP TABLE acchits", DB_WRITE);
1577
1578                         ignore_user_abort( $old_user_abort );
1579                         wfProfileOut( "Article::incViewCount-collect" );
1580                 }
1581                 wfIgnoreSQLErrors( $oldignore );
1582         }
1583
1584         # The onArticle*() functions are supposed to be a kind of hooks
1585         # which should be called whenever any of the specified actions
1586         # are done.
1587         #
1588         # This is a good place to put code to clear caches, for instance.
1589
1590         # This is called on page move and undelete, as well as edit
1591         /* static */ function onArticleCreate($title_obj){
1592                 global $wgEnablePersistentLC, $wgEnableParserCache, $wgUseSquid, $wgDeferredUpdateList;
1593
1594                 $titles = $title_obj->getBrokenLinksTo();
1595
1596                 # Purge squid
1597                 if ( $wgUseSquid ) {
1598                         $urls = $title_obj->getSquidURLs();
1599                         foreach ( $titles as $linkTitle ) {
1600                                 $urls[] = $linkTitle->getInternalURL();
1601                         }
1602                         $u = new SquidUpdate( $urls );
1603                         array_push( $wgDeferredUpdateList, $u );
1604                 }
1605
1606                 # Clear persistent link cache
1607                 if ( $wgEnablePersistentLC ) {
1608                         LinkCache::linksccClearBrokenLinksTo( $title_obj->getPrefixedDBkey() );
1609                 }
1610
1611                 # Clear parser cache (not really used)
1612                 if ( $wgEnableParserCache ) {
1613                         OutputPage::parsercacheClearBrokenLinksTo( $title_obj->getPrefixedDBkey() );
1614                 }
1615         }
1616
1617         /* static */ function onArticleDelete($title_obj){
1618                 global $wgEnablePersistentLC, $wgEnableParserCache;
1619                 if ( $wgEnablePersistentLC ) {
1620                         LinkCache::linksccClearLinksTo( $title_obj->getArticleID() );
1621                 }
1622                 if ( $wgEnableParserCache ) {
1623                         OutputPage::parsercacheClearLinksTo( $title_obj->getArticleID() );
1624                 }
1625         }
1626
1627         /* static */ function onArticleEdit($title_obj){
1628                 global $wgEnablePersistentLC, $wgEnableParserCache;
1629                 if ( $wgEnablePersistentLC ) {
1630                         LinkCache::linksccClearPage( $title_obj->getArticleID() );
1631                 }
1632                 if ( $wgEnableParserCache ) {
1633                         OutputPage::parsercacheClearPage( $title_obj->getArticleID(), $title_obj->getNamespace() );
1634                 }
1635         }
1636 }
1637
1638 ?>