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