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