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