includes/Article.php

   1 <?php
   2 # Class representing a Wikipedia article and history.
   3 # See design.doc for an overview.
   4
   5 # Note: edit user interface and cache support functions have been
   6 # moved to separate EditPage and CacheManager classes.
   7
   8 include_once( "CacheManager.php" );
   9
  10 class Article {
  11         /* private */ var $mContent, $mContentLoaded;
  12         /* private */ var $mUser, $mTimestamp, $mUserText;
  13         /* private */ var $mCounter, $mComment, $mCountAdjustment;
  14         /* private */ var $mMinorEdit, $mRedirectedFrom;
  15         /* private */ var $mTouched, $mFileCache, $mTitle;
  16         /* private */ var $mId, $mTable;
  17
  18         function Article( &$title ) {
  19                 $this->mTitle =& $title;
  20                 $this->clear();
  21         }
  22
  23         /* private */ function clear()
  24         {
  25                 $this->mContentLoaded = false;
  26                 $this->mCurID = $this->mUser = $this->mCounter = -1; # Not loaded
  27                 $this->mRedirectedFrom = $this->mUserText =
  28                 $this->mTimestamp = $this->mComment = $this->mFileCache = "";
  29                 $this->mCountAdjustment = 0;
  30                 $this->mTouched = "19700101000000";
  31         }
  32
  33         /* static */ function getRevisionText( $row, $prefix = "old_" ) {
  34                 # Deal with optional compression of archived pages.
  35                 # This can be done periodically via maintenance/compressOld.php, and
  36                 # as pages are saved if $wgCompressRevisions is set.
  37                 $text = $prefix . "text";
  38                 $flags = $prefix . "flags";
  39                 if( isset( $row->$flags ) && (false !== strpos( $row->$flags, "gzip" ) ) ) {
  40                         return gzinflate( $row->$text );
  41                 }
  42                 if( isset( $row->$text ) ) {
  43                         return $row->$text;
  44                 }
  45                 return false;
  46         }
  47
  48         /* static */ function compressRevisionText( &$text ) {
  49                 global $wgCompressRevisions;
  50                 if( !$wgCompressRevisions ) {
  51                         return "";
  52                 }
  53                 if( !function_exists( "gzdeflate" ) ) {
  54                         wfDebug( "Article::compressRevisionText() -- no zlib support, not compressing\n" );
  55                         return "";
  56                 }
  57                 $text = gzdeflate( $text );
  58                 return "gzip";
  59         }
  60
  61         # Note that getContent/loadContent may follow redirects if
  62         # not told otherwise, and so may cause a change to mTitle.
  63
  64         # Return the text of this revision
  65         function getContent( $noredir = false )
  66         {
  67                 global $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                                                 $striparray=array();
 106                                                 $parser=new Parser();
 107                                                 $parser->mOutputType=OT_WIKI;
 108                                                 $striptext=$parser->strip($this->mContent, $striparray, true);
 109
 110                                                 # now that we can be sure that no pseudo-sections are in the source,
 111                                                 # split it up by section
 112                                                 $secs =
 113                                                   preg_split(
 114                                                   "/(^=+.*?=+|^<h[1-6].*?>.*?<\/h[1-6].*?>)/mi",
 115                                                   $striptext, -1,
 116                                                   PREG_SPLIT_DELIM_CAPTURE);
 117
 118                                                 if($section==0) {
 119                                                         $rv=$secs[0];
 120                                                 } else {
 121                                                         $rv=$secs[$section*2-1] . $secs[$section*2];
 122                                                 }
 123
 124                                                 # reinsert stripped tags
 125                                                 $rv=$parser->unstrip($rv,$striparray);
 126                                                 $rv=trim($rv);
 127                                                 wfProfileOut( $fname );
 128                                                 return $rv;
 129                                         }
 130                                 }
 131                                 wfProfileOut( $fname );
 132                                 return $this->mContent;
 133                         }
 134                 }
 135         }
 136
 137         # Load the revision (including cur_text) into this object
 138         function loadContent( $noredir = false )
 139         {
 140                 global $wgOut, $wgMwRedir, $wgRequest;
 141
 142                 # Query variables :P
 143                 $oldid = $wgRequest->getVal( 'oldid' );
 144                 $redirect = $wgRequest->getVal( 'redirect' );
 145
 146                 if ( $this->mContentLoaded ) return;
 147                 $fname = "Article::loadContent";
 148
 149                 # Pre-fill content with error message so that if something
 150                 # fails we'll have something telling us what we intended.
 151
 152                 $t = $this->mTitle->getPrefixedText();
 153                 if ( isset( $oldid ) ) {
 154                         $oldid = IntVal( $oldid );
 155                         $t .= ",oldid={$oldid}";
 156                 }
 157                 if ( isset( $redirect ) ) {
 158                         $redirect = ($redirect == "no") ? "no" : "yes";
 159                         $t .= ",redirect={$redirect}";
 160                 }
 161                 $this->mContent = wfMsg( "missingarticle", $t );
 162
 163                 if ( ! $oldid ) {       # Retrieve current version
 164                         $id = $this->getID();
 165                         if ( 0 == $id ) return;
 166
 167                         $sql = "SELECT " .
 168                           "cur_text,cur_timestamp,cur_user,cur_counter,cur_restrictions,cur_touched " .
 169                           "FROM cur WHERE cur_id={$id}";
 170                         wfDebug( "$sql\n" );
 171                         $res = wfQuery( $sql, DB_READ, $fname );
 172                         if ( 0 == wfNumRows( $res ) ) {
 173                                 return;
 174                         }
 175
 176                         $s = wfFetchObject( $res );
 177                         # If we got a redirect, follow it (unless we've been told
 178                         # not to by either the function parameter or the query
 179                         if ( ( "no" != $redirect ) && ( false == $noredir ) &&
 180                           ( $wgMwRedir->matchStart( $s->cur_text ) ) ) {
 181                                 if ( preg_match( "/\\[\\[([^\\]\\|]+)[\\]\\|]/",
 182                                   $s->cur_text, $m ) ) {
 183                                         $rt = Title::newFromText( $m[1] );
 184                                         if( $rt ) {
 185                                                 # Gotta hand redirects to special pages differently:
 186                                                 # Fill the HTTP response "Location" header and ignore
 187                                                 # the rest of the page we're on.
 188
 189                                                 if ( $rt->getInterwiki() != "" ) {
 190                                                         $wgOut->redirect( $rt->getFullURL() ) ;
 191                                                         return;
 192                                                 }
 193                                                 if ( $rt->getNamespace() == Namespace::getSpecial() ) {
 194                                                         $wgOut->redirect( $rt->getFullURL() );
 195                                                         return;
 196                                                 }
 197                                                 $rid = $rt->getArticleID();
 198                                                 if ( 0 != $rid ) {
 199                                                         $sql = "SELECT cur_text,cur_timestamp,cur_user," .
 200                                                           "cur_counter,cur_restrictions,cur_touched FROM cur WHERE cur_id={$rid}";
 201                                                         $res = wfQuery( $sql, DB_READ, $fname );
 202
 203                                                         if ( 0 != wfNumRows( $res ) ) {
 204                                                                 $this->mRedirectedFrom = $this->mTitle->getPrefixedText();
 205                                                                 $this->mTitle = $rt;
 206                                                                 $s = wfFetchObject( $res );
 207                                                         }
 208                                                 }
 209                                         }
 210                                 }
 211                         }
 212
 213                         $this->mContent = $s->cur_text;
 214                         $this->mUser = $s->cur_user;
 215                         $this->mCounter = $s->cur_counter;
 216                         $this->mTimestamp = $s->cur_timestamp;
 217                         $this->mTouched = $s->cur_touched;
 218                         $this->mTitle->mRestrictions = explode( ",", trim( $s->cur_restrictions ) );
 219                         $this->mTitle->mRestrictionsLoaded = true;
 220                         wfFreeResult( $res );
 221                 } else { # oldid set, retrieve historical version
 222                         $sql = "SELECT old_text,old_timestamp,old_user,old_flags FROM old " .
 223                           "WHERE old_id={$oldid}";
 224                         $res = wfQuery( $sql, DB_READ, $fname );
 225                         if ( 0 == wfNumRows( $res ) ) { return; }
 226
 227                         $s = wfFetchObject( $res );
 228                         $this->mContent = Article::getRevisionText( $s );
 229                         $this->mUser = $s->old_user;
 230                         $this->mCounter = 0;
 231                         $this->mTimestamp = $s->old_timestamp;
 232                         wfFreeResult( $res );
 233                 }
 234                 $this->mContentLoaded = true;
 235                 return $this->mContent;
 236         }
 237
 238         # Gets the article text without using so many damn globals
 239         # Returns false on error
 240         function getContentWithoutUsingSoManyDamnGlobals( $oldid = 0, $noredir = false ) {
 241                 global $wgMwRedir;
 242
 243                 if ( $this->mContentLoaded ) {
 244                         return $this->mContent;
 245                 }
 246                 $this->mContent = false;
 247
 248                 $fname = "Article::loadContent";
 249
 250                 if ( ! $oldid ) {       # Retrieve current version
 251                         $id = $this->getID();
 252                         if ( 0 == $id ) {
 253                                 return false;
 254                         }
 255
 256                         $sql = "SELECT " .
 257                           "cur_text,cur_timestamp,cur_user,cur_counter,cur_restrictions,cur_touched " .
 258                           "FROM cur WHERE cur_id={$id}";
 259                         $res = wfQuery( $sql, DB_READ, $fname );
 260                         if ( 0 == wfNumRows( $res ) ) {
 261                                 return false;
 262                         }
 263
 264                         $s = wfFetchObject( $res );
 265                         # If we got a redirect, follow it (unless we've been told
 266                         # not to by either the function parameter or the query
 267                         if ( !$noredir && $wgMwRedir->matchStart( $s->cur_text ) ) {
 268                                 if ( preg_match( "/\\[\\[([^\\]\\|]+)[\\]\\|]/",
 269                                   $s->cur_text, $m ) ) {
 270                                         $rt = Title::newFromText( $m[1] );
 271                                         if( $rt &&  $rt->getInterwiki() == "" && $rt->getNamespace() != Namespace::getSpecial() ) {
 272                                                 $rid = $rt->getArticleID();
 273                                                 if ( 0 != $rid ) {
 274                                                         $sql = "SELECT cur_text,cur_timestamp,cur_user," .
 275                                                           "cur_counter,cur_restrictions,cur_touched FROM cur WHERE cur_id={$rid}";
 276                                                         $res = wfQuery( $sql, DB_READ, $fname );
 277
 278                                                         if ( 0 != wfNumRows( $res ) ) {
 279                                                                 $this->mRedirectedFrom = $this->mTitle->getPrefixedText();
 280                                                                 $this->mTitle = $rt;
 281                                                                 $s = wfFetchObject( $res );
 282                                                         }
 283                                                 }
 284                                         }
 285                                 }
 286                         }
 287
 288                         $this->mContent = $s->cur_text;
 289                         $this->mUser = $s->cur_user;
 290                         $this->mCounter = $s->cur_counter;
 291                         $this->mTimestamp = $s->cur_timestamp;
 292                         $this->mTouched = $s->cur_touched;
 293                         $this->mTitle->mRestrictions = explode( ",", trim( $s->cur_restrictions ) );
 294                         $this->mTitle->mRestrictionsLoaded = true;
 295                         wfFreeResult( $res );
 296                 } else { # oldid set, retrieve historical version
 297                         $sql = "SELECT old_text,old_timestamp,old_user,old_flags FROM old " .
 298                           "WHERE old_id={$oldid}";
 299                         $res = wfQuery( $sql, DB_READ, $fname );
 300                         if ( 0 == wfNumRows( $res ) ) {
 301                                 return false;
 302                         }
 303
 304                         $s = wfFetchObject( $res );
 305                         $this->mContent = Article::getRevisionText( $s );
 306                         $this->mUser = $s->old_user;
 307                         $this->mCounter = 0;
 308                         $this->mTimestamp = $s->old_timestamp;
 309                         wfFreeResult( $res );
 310                 }
 311                 $this->mContentLoaded = true;
 312                 return $this->mContent;
 313         }
 314
 315         function getID() {
 316                 if( $this->mTitle ) {
 317                         return $this->mTitle->getArticleID();
 318                 } else {
 319                         return 0;
 320                 }
 321         }
 322
 323         function getCount()
 324         {
 325                 if ( -1 == $this->mCounter ) {
 326                         $id = $this->getID();
 327                         $this->mCounter = wfGetSQL( "cur", "cur_counter", "cur_id={$id}" );
 328                 }
 329                 return $this->mCounter;
 330         }
 331
 332         # Would the given text make this article a "good" article (i.e.,
 333         # suitable for including in the article count)?
 334
 335         function isCountable( $text )
 336         {
 337                 global $wgUseCommaCount, $wgMwRedir;
 338
 339                 if ( 0 != $this->mTitle->getNamespace() ) { return 0; }
 340                 if ( $wgMwRedir->matchStart( $text ) ) { return 0; }
 341                 $token = ($wgUseCommaCount ? "," : "[[" );
 342                 if ( false === strstr( $text, $token ) ) { return 0; }
 343                 return 1;
 344         }
 345
 346         # Loads everything from cur except cur_text
 347         # This isn't necessary for all uses, so it's only done if needed.
 348
 349         /* private */ function loadLastEdit()
 350         {
 351                 global $wgOut;
 352                 if ( -1 != $this->mUser ) return;
 353
 354                 $sql = "SELECT cur_user,cur_user_text,cur_timestamp," .
 355                   "cur_comment,cur_minor_edit FROM cur WHERE " .
 356                   "cur_id=" . $this->getID();
 357                 $res = wfQuery( $sql, DB_READ, "Article::loadLastEdit" );
 358
 359                 if ( wfNumRows( $res ) > 0 ) {
 360                         $s = wfFetchObject( $res );
 361                         $this->mUser = $s->cur_user;
 362                         $this->mUserText = $s->cur_user_text;
 363                         $this->mTimestamp = $s->cur_timestamp;
 364                         $this->mComment = $s->cur_comment;
 365                         $this->mMinorEdit = $s->cur_minor_edit;
 366                 }
 367         }
 368
 369         function getTimestamp()
 370         {
 371                 $this->loadLastEdit();
 372                 return $this->mTimestamp;
 373         }
 374
 375         function getUser()
 376         {
 377                 $this->loadLastEdit();
 378                 return $this->mUser;
 379         }
 380
 381         function getUserText()
 382         {
 383                 $this->loadLastEdit();
 384                 return $this->mUserText;
 385         }
 386
 387         function getComment()
 388         {
 389                 $this->loadLastEdit();
 390                 return $this->mComment;
 391         }
 392
 393         function getMinorEdit()
 394         {
 395                 $this->loadLastEdit();
 396                 return $this->mMinorEdit;
 397         }
 398
 399         function getContributors($limit = 0, $offset = 0)
 400         {
 401                 # XXX: this is expensive; cache this info somewhere.
 402
 403                 $title = $this->mTitle;
 404
 405                 $contribs = array();
 406
 407                 $res = wfQuery("SELECT DISTINCT old.old_user, old.old_user_text, user.user_real_name " .
 408                                " FROM old, user " .
 409                                " WHERE old.old_user = user.user_id " .
 410                                " AND old.old_namespace = " . $title->getNamespace() .
 411                                " AND old.old_title = '" . $title->getDBkey() . "'" .
 412                                " AND old.old_user != 0 " .
 413                                " AND old.old_user != " . $this->getUser(), DB_READ);
 414
 415                 while ( $line = wfFetchObject( $res ) ) {
 416                         $contribs[$line->old_user] = array($line->old_user_text, $line->user_real_name);
 417                 }
 418
 419                 # Count anonymous users
 420
 421                 $res = wfQuery("SELECT COUNT(*) AS cnt " .
 422                                " FROM old " .
 423                                " WHERE old_namespace = " . $title->getNamespace() .
 424                                " AND old_title = '" . $title->getDBkey() . "'" .
 425                                " AND old_user = 0 ", DB_READ);
 426
 427                 while ( $line = wfFetchObject( $res ) ) {
 428                         $contribs[0] = array($line->cnt, 'Anonymous');
 429                 }
 430
 431                 return $contribs;
 432         }
 433
 434         # This is the default action of the script: just view the page of
 435         # the given title.
 436
 437         function view()
 438         {
 439                 global $wgUser, $wgOut, $wgLang, $wgRequest;
 440                 global $wgLinkCache, $IP, $wgEnableParserCache;
 441
 442                 $fname = "Article::view";
 443                 wfProfileIn( $fname );
 444
 445                 # Get variables from query string :P
 446                 $oldid = $wgRequest->getVal( 'oldid' );
 447                 $diff = $wgRequest->getVal( 'diff' );
 448
 449                 $wgOut->setArticleFlag( true );
 450                 $wgOut->setRobotpolicy( "index,follow" );
 451
 452                 # If we got diff and oldid in the query, we want to see a
 453                 # diff page instead of the article.
 454
 455                 if ( !is_null( $diff ) ) {
 456                         $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
 457                         $de = new DifferenceEngine( intval($oldid), intval($diff) );
 458                         $de->showDiffPage();
 459                         wfProfileOut( $fname );
 460                         return;
 461                 }
 462
 463                 if ( !is_null( $oldid ) and $this->checkTouched() ) {
 464                         if( $wgOut->checkLastModified( $this->mTouched ) ){
 465                                 return;
 466                         } else if ( $this->tryFileCache() ) {
 467                                 # tell wgOut that output is taken care of
 468                                 $wgOut->disable();
 469                                 $this->viewUpdates();
 470                                 return;
 471                         }
 472                 }
 473
 474                 $text = $this->getContent(); # May change mTitle
 475                 $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
 476
 477                 # We're looking at an old revision
 478
 479                 if ( !empty( $oldid ) ) {
 480                         $this->setOldSubtitle();
 481                         $wgOut->setRobotpolicy( "noindex,follow" );
 482                 }
 483                 if ( "" != $this->mRedirectedFrom ) {
 484                         $sk = $wgUser->getSkin();
 485                         $redir = $sk->makeKnownLink( $this->mRedirectedFrom, "",
 486                           "redirect=no" );
 487                         $s = wfMsg( "redirectedfrom", $redir );
 488                         $wgOut->setSubtitle( $s );
 489                 }
 490
 491                 $wgLinkCache->preFill( $this->mTitle );
 492
 493                 if( $wgEnableParserCache && intval($wgUser->getOption( "stubthreshold" )) == 0 ){
 494                         $wgOut->addWikiText( $text, true, $this );
 495                 } else {
 496                         $wgOut->addWikiText( $text );
 497                 }
 498
 499                 # Add link titles as META keywords
 500                 $wgOut->addMetaTags() ;
 501
 502                 $this->viewUpdates();
 503                 wfProfileOut( $fname );
 504         }
 505
 506         # Theoretically we could defer these whole insert and update
 507         # functions for after display, but that's taking a big leap
 508         # of faith, and we want to be able to report database
 509         # errors at some point.
 510
 511         /* private */ function insertNewArticle( $text, $summary, $isminor, $watchthis )
 512         {
 513                 global $wgOut, $wgUser, $wgLinkCache, $wgMwRedir;
 514                 global $wgUseSquid, $wgDeferredUpdateList, $wgInternalServer;
 515
 516                 $fname = "Article::insertNewArticle";
 517
 518                 $this->mCountAdjustment = $this->isCountable( $text );
 519
 520                 $ns = $this->mTitle->getNamespace();
 521                 $ttl = $this->mTitle->getDBkey();
 522                 $text = $this->preSaveTransform( $text );
 523                 if ( $wgMwRedir->matchStart( $text ) ) { $redir = 1; }
 524                 else { $redir = 0; }
 525
 526                 $now = wfTimestampNow();
 527                 $won = wfInvertTimestamp( $now );
 528                 wfSeedRandom();
 529                 $rand = number_format( mt_rand() / mt_getrandmax(), 12, ".", "" );
 530                 $isminor = ( $isminor && $wgUser->getID() ) ? 1 : 0;
 531                 $sql = "INSERT INTO cur (cur_namespace,cur_title,cur_text," .
 532                   "cur_comment,cur_user,cur_timestamp,cur_minor_edit,cur_counter," .
 533                   "cur_restrictions,cur_user_text,cur_is_redirect," .
 534                   "cur_is_new,cur_random,cur_touched,inverse_timestamp) VALUES ({$ns},'" . wfStrencode( $ttl ) . "', '" .
 535                   wfStrencode( $text ) . "', '" .
 536                   wfStrencode( $summary ) . "', '" .
 537                   $wgUser->getID() . "', '{$now}', " .
 538                   $isminor . ", 0, '', '" .
 539                   wfStrencode( $wgUser->getName() ) . "', $redir, 1, $rand, '{$now}', '{$won}')";
 540                 $res = wfQuery( $sql, DB_WRITE, $fname );
 541
 542                 $newid = wfInsertId();
 543                 $this->mTitle->resetArticleID( $newid );
 544
 545                 Article::onArticleCreate( $this->mTitle );
 546                 RecentChange::notifyNew( $now, $this->mTitle, $isminor, $wgUser, $summary );
 547
 548                 if ($watchthis) {
 549                         if(!$this->mTitle->userIsWatching()) $this->watch();
 550                 } else {
 551                         if ( $this->mTitle->userIsWatching() ) {
 552                                 $this->unwatch();
 553                         }
 554                 }
 555
 556                 # The talk page isn't in the regular link tables, so we need to update manually:
 557                 $talkns = $ns ^ 1; # talk -> normal; normal -> talk
 558                 $sql = "UPDATE cur set cur_touched='$now' WHERE cur_namespace=$talkns AND cur_title='" . wfStrencode( $ttl ) . "'";
 559                 wfQuery( $sql, DB_WRITE );
 560
 561                 # standard deferred updates
 562                 $this->editUpdates( $text );
 563
 564                 $this->showArticle( $text, wfMsg( "newarticle" ) );
 565         }
 566
 567
 568         /* Side effects: loads last edit */
 569         function getTextOfLastEditWithSectionReplacedOrAdded($section, $text, $summary = ""){
 570                 $this->loadLastEdit();
 571                 $oldtext = $this->getContent();
 572                 if ($section != "") {
 573                         if($section=="new") {
 574                                 if($summary) $subject="== {$summary} ==\n\n";
 575                                 $text=$oldtext."\n\n".$subject.$text;
 576                         } else {
 577
 578                                 # strip NOWIKI etc. to avoid confusion (true-parameter causes HTML
 579                                 # comments to be stripped as well)
 580                                 $striparray=array();
 581                                 $parser=new Parser();
 582                                 $parser->mOutputType=OT_WIKI;
 583                                 $oldtext=$parser->strip($oldtext, $striparray, true);
 584
 585                                 # now that we can be sure that no pseudo-sections are in the source,
 586                                 # split it up
 587                                 $secs=preg_split("/(^=+.*?=+|^<h[1-6].*?>.*?<\/h[1-6].*?>)/mi",
 588                                   $oldtext,-1,PREG_SPLIT_DELIM_CAPTURE);
 589                                 $secs[$section*2]=$text."\n\n"; // replace with edited
 590                                 if($section) { $secs[$section*2-1]=""; } // erase old headline
 591                                 $text=join("",$secs);
 592
 593                                 # reinsert the stuff that we stripped out earlier
 594                                 $text=$parser->unstrip($text,$striparray,true);
 595                         }
 596                 }
 597                 return $text;
 598         }
 599
 600         function updateArticle( $text, $summary, $minor, $watchthis, $forceBot = false )
 601         {
 602                 global $wgOut, $wgUser, $wgLinkCache;
 603                 global $wgDBtransactions, $wgMwRedir;
 604                 global $wgUseSquid, $wgInternalServer;
 605                 $fname = "Article::updateArticle";
 606
 607                 if ( $this->mMinorEdit ) { $me1 = 1; } else { $me1 = 0; }
 608                 if ( $minor && $wgUser->getID() ) { $me2 = 1; } else { $me2 = 0; }
 609                 if ( preg_match( "/^((" . $wgMwRedir->getBaseRegex() . ")[^\\n]+)/i", $text, $m ) ) {
 610                         $redir = 1;
 611                         $text = $m[1] . "\n"; # Remove all content but redirect
 612                 }
 613                 else { $redir = 0; }
 614
 615                 $text = $this->preSaveTransform( $text );
 616
 617                 # Update article, but only if changed.
 618
 619                 if( $wgDBtransactions ) {
 620                         $sql = "BEGIN";
 621                         wfQuery( $sql, DB_WRITE );
 622                 }
 623                 $oldtext = $this->getContent( true );
 624
 625                 if ( 0 != strcmp( $text, $oldtext ) ) {
 626                         $this->mCountAdjustment = $this->isCountable( $text )
 627                           - $this->isCountable( $oldtext );
 628
 629                         $now = wfTimestampNow();
 630                         $won = wfInvertTimestamp( $now );
 631                         $sql = "UPDATE cur SET cur_text='" . wfStrencode( $text ) .
 632                           "',cur_comment='" .  wfStrencode( $summary ) .
 633                           "',cur_minor_edit={$me2}, cur_user=" . $wgUser->getID() .
 634                           ",cur_timestamp='{$now}',cur_user_text='" .
 635                           wfStrencode( $wgUser->getName() ) .
 636                           "',cur_is_redirect={$redir}, cur_is_new=0, cur_touched='{$now}', inverse_timestamp='{$won}' " .
 637                           "WHERE cur_id=" . $this->getID() .
 638                           " AND cur_timestamp='" . $this->getTimestamp() . "'";
 639                         $res = wfQuery( $sql, DB_WRITE, $fname );
 640
 641                         if( wfAffectedRows() == 0 ) {
 642                                 /* Belated edit conflict! Run away!! */
 643                                 return false;
 644                         }
 645
 646                         # This overwrites $oldtext if revision compression is on
 647                         $flags = Article::compressRevisionText( $oldtext );
 648
 649                         $sql = "INSERT INTO old (old_namespace,old_title,old_text," .
 650                           "old_comment,old_user,old_user_text,old_timestamp," .
 651                           "old_minor_edit,inverse_timestamp,old_flags) VALUES (" .
 652                           $this->mTitle->getNamespace() . ", '" .
 653                           wfStrencode( $this->mTitle->getDBkey() ) . "', '" .
 654                           wfStrencode( $oldtext ) . "', '" .
 655                           wfStrencode( $this->getComment() ) . "', " .
 656                           $this->getUser() . ", '" .
 657                           wfStrencode( $this->getUserText() ) . "', '" .
 658                           $this->getTimestamp() . "', " . $me1 . ", '" .
 659                           wfInvertTimestamp( $this->getTimestamp() ) . "','$flags')";
 660                         $res = wfQuery( $sql, DB_WRITE, $fname );
 661                         $oldid = wfInsertID( $res );
 662
 663                         $bot = (int)($wgUser->isBot() || $forceBot);
 664                         RecentChange::notifyEdit( $now, $this->mTitle, $me2, $wgUser, $summary,
 665                                 $oldid, $this->getTimestamp(), $bot );
 666                         Article::onArticleEdit( $this->mTitle );
 667                 }
 668
 669                 if( $wgDBtransactions ) {
 670                         $sql = "COMMIT";
 671                         wfQuery( $sql, DB_WRITE );
 672                 }
 673
 674                 if ($watchthis) {
 675                         if (!$this->mTitle->userIsWatching()) $this->watch();
 676                 } else {
 677                         if ( $this->mTitle->userIsWatching() ) {
 678                                 $this->unwatch();
 679                         }
 680                 }
 681                 # standard deferred updates
 682                 $this->editUpdates( $text );
 683
 684
 685                 $urls = array();
 686                 # Template namespace
 687                 # Purge all articles linking here
 688                 if ( $this->mTitle->getNamespace() == NS_TEMPLATE) {
 689                         $titles = $this->mTitle->getLinksTo();
 690                         Title::touchArray( $titles );
 691                         if ( $wgUseSquid ) {
 692                                 foreach ( $titles as $title ) {
 693                                         $urls[] = $title->getInternalURL();
 694                                 }
 695                         }
 696                 }
 697
 698                 # Squid updates
 699                 if ( $wgUseSquid ) {
 700                         $urls = array_merge( $urls, $this->mTitle->getSquidURLs() );
 701                         $u = new SquidUpdate( $urls );
 702                         $u->doUpdate();
 703                 }
 704
 705                 $this->showArticle( $text, wfMsg( "updated" ) );
 706                 return true;
 707         }
 708
 709         # After we've either updated or inserted the article, update
 710         # the link tables and redirect to the new page.
 711
 712         function showArticle( $text, $subtitle )
 713         {
 714                 global $wgOut, $wgUser, $wgLinkCache;
 715                 global $wgMwRedir;
 716
 717                 $wgLinkCache = new LinkCache();
 718
 719                 # Get old version of link table to allow incremental link updates
 720                 $wgLinkCache->preFill( $this->mTitle );
 721                 $wgLinkCache->clear();
 722
 723                 # Now update the link cache by parsing the text
 724                 $wgOut = new OutputPage();
 725                 $wgOut->addWikiText( $text );
 726
 727                 if( $wgMwRedir->matchStart( $text ) )
 728                         $r = "redirect=no";
 729                 else
 730                         $r = "";
 731                 $wgOut->redirect( $this->mTitle->getFullURL( $r ) );
 732         }
 733
 734         # Add this page to my watchlist
 735
 736         function watch( $add = true )
 737         {
 738                 global $wgUser, $wgOut, $wgLang;
 739                 global $wgDeferredUpdateList;
 740
 741                 if ( 0 == $wgUser->getID() ) {
 742                         $wgOut->errorpage( "watchnologin", "watchnologintext" );
 743                         return;
 744                 }
 745                 if ( wfReadOnly() ) {
 746                         $wgOut->readOnlyPage();
 747                         return;
 748                 }
 749                 if( $add )
 750                         $wgUser->addWatch( $this->mTitle );
 751                 else
 752                         $wgUser->removeWatch( $this->mTitle );
 753
 754                 $wgOut->setPagetitle( wfMsg( $add ? "addedwatch" : "removedwatch" ) );
 755                 $wgOut->setRobotpolicy( "noindex,follow" );
 756
 757                 $sk = $wgUser->getSkin() ;
 758                 $link = $this->mTitle->getPrefixedText();
 759
 760                 if($add)
 761                         $text = wfMsg( "addedwatchtext", $link );
 762                 else
 763                         $text = wfMsg( "removedwatchtext", $link );
 764                 $wgOut->addWikiText( $text );
 765
 766                 $up = new UserUpdate();
 767                 array_push( $wgDeferredUpdateList, $up );
 768
 769                 $wgOut->returnToMain( false );
 770         }
 771
 772         function unwatch()
 773         {
 774                 $this->watch( false );
 775         }
 776
 777         function protect( $limit = "sysop" )
 778         {
 779                 global $wgUser, $wgOut, $wgRequest;
 780
 781                 if ( ! $wgUser->isSysop() ) {
 782                         $wgOut->sysopRequired();
 783                         return;
 784                 }
 785                 if ( wfReadOnly() ) {
 786                         $wgOut->readOnlyPage();
 787                         return;
 788                 }
 789                 $id = $this->mTitle->getArticleID();
 790                 if ( 0 == $id ) {
 791                         $wgOut->fatalError( wfMsg( "badarticleerror" ) );
 792                         return;
 793                 }
 794
 795                 $confirm = $wgRequest->getBool( 'wpConfirmProtect' ) && $wgRequest->wasPosted();
 796                 $reason = $wgRequest->getText( 'wpReasonProtect' );
 797
 798                 if ( $confirm ) {
 799
 800         $sql = "UPDATE cur SET cur_touched='" . wfTimestampNow() . "'," .
 801                         "cur_restrictions='{$limit}' WHERE cur_id={$id}";
 802                 wfQuery( $sql, DB_WRITE, "Article::protect" );
 803
 804                 $log = new LogPage( wfMsg( "protectlogpage" ), wfMsg( "protectlogtext" ) );
 805                 if ( $limit === "" ) {
 806                                 $log->addEntry( wfMsg( "unprotectedarticle", $this->mTitle->getPrefixedText() ), $reason );
 807                 } else {
 808                                 $log->addEntry( wfMsg( "protectedarticle", $this->mTitle->getPrefixedText() ), $reason );
 809                 }
 810                 $wgOut->redirect( $this->mTitle->getFullURL() );
 811                         return;
 812                 } else {
 813                         $reason = htmlspecialchars( wfMsg( "protectreason" ) );
 814                         return $this->confirmProtect( "", $reason, $limit );
 815                 }
 816         }
 817
 818                 # Output protection confirmation dialog
 819         function confirmProtect( $par, $reason, $limit = "sysop"  )
 820         {
 821                 global $wgOut;
 822
 823                 wfDebug( "Article::confirmProtect\n" );
 824
 825                 $sub = htmlspecialchars( $this->mTitle->getPrefixedText() );
 826                 $wgOut->setRobotpolicy( "noindex,nofollow" );
 827
 828                 $check = "";
 829                 $protcom = "";
 830
 831                 if ( $limit === "" ) {
 832                         $wgOut->setSubtitle( wfMsg( "unprotectsub", $sub ) );
 833                         $wgOut->addWikiText( wfMsg( "confirmunprotecttext" ) );
 834                         $check = htmlspecialchars( wfMsg( "confirmunprotect" ) );
 835                         $protcom = htmlspecialchars( wfMsg( "unprotectcomment" ) );
 836                         $formaction = $this->mTitle->escapeLocalURL( "action=unprotect" . $par );
 837                 } else {
 838                         $wgOut->setSubtitle( wfMsg( "protectsub", $sub ) );
 839                         $wgOut->addWikiText( wfMsg( "confirmprotecttext" ) );
 840                         $check = htmlspecialchars( wfMsg( "confirmprotect" ) );
 841                         $protcom = htmlspecialchars( wfMsg( "protectcomment" ) );
 842                         $formaction = $this->mTitle->escapeLocalURL( "action=protect" . $par );
 843                 }
 844
 845                 $confirm = htmlspecialchars( wfMsg( "confirm" ) );
 846
 847                 $wgOut->addHTML( "
 848 <form id='protectconfirm' method='post' action=\"{$formaction}\">
 849         <table border='0'>
 850                 <tr>
 851                         <td align='right'>
 852                                 <label for='wpReasonProtect'>{$protcom}:</label>
 853                         </td>
 854                         <td align='left'>
 855                                 <input type='text' size='60' name='wpReasonProtect' id='wpReasonProtect' value=\"" . htmlspecialchars( $reason ) . "\" />
 856                         </td>
 857                 </tr>
 858                 <tr>
 859                         <td>&nbsp;</td>
 860                 </tr>
 861                 <tr>
 862                         <td align='right'>
 863                                 <input type='checkbox' name='wpConfirmProtect' value='1' id='wpConfirmProtect' />
 864                         </td>
 865                         <td>
 866                                 <label for='wpConfirmProtect'>{$check}</label>
 867                         </td>
 868                 </tr>
 869                 <tr>
 870                         <td>&nbsp;</td>
 871                         <td>
 872                                 <input type='submit' name='wpConfirmProtectB' value=\"{$confirm}\" />
 873                         </td>
 874                 </tr>
 875         </table>
 876 </form>\n" );
 877
 878                 $wgOut->returnToMain( false );
 879         }
 880
 881         function unprotect()
 882         {
 883                 return $this->protect( "" );
 884         }
 885
 886         # UI entry point for page deletion
 887         function delete()
 888         {
 889                 global $wgUser, $wgOut, $wgMessageCache, $wgRequest;
 890                 $fname = "Article::delete";
 891                 $confirm = $wgRequest->getBool( 'wpConfirm' ) && $wgRequest->wasPosted();
 892                 $reason = $wgRequest->getText( 'wpReason' );
 893
 894                 # This code desperately needs to be totally rewritten
 895
 896                 # Check permissions
 897                 if ( ( ! $wgUser->isSysop() ) ) {
 898                         $wgOut->sysopRequired();
 899                         return;
 900                 }
 901                 if ( wfReadOnly() ) {
 902                         $wgOut->readOnlyPage();
 903                         return;
 904                 }
 905
 906                 # Better double-check that it hasn't been deleted yet!
 907                 $wgOut->setPagetitle( wfMsg( "confirmdelete" ) );
 908                 if ( ( "" == trim( $this->mTitle->getText() ) )
 909                   or ( $this->mTitle->getArticleId() == 0 ) ) {
 910                         $wgOut->fatalError( wfMsg( "cannotdelete" ) );
 911                         return;
 912                 }
 913
 914                 if ( $confirm ) {
 915                         $this->doDelete( $reason );
 916                         return;
 917                 }
 918
 919                 # determine whether this page has earlier revisions
 920                 # and insert a warning if it does
 921                 # we select the text because it might be useful below
 922                 $ns = $this->mTitle->getNamespace();
 923                 $title = $this->mTitle->getDBkey();
 924                 $etitle = wfStrencode( $title );
 925                 $sql = "SELECT old_text,old_flags FROM old WHERE old_namespace=$ns and old_title='$etitle' ORDER BY inverse_timestamp LIMIT 1";
 926                 $res = wfQuery( $sql, DB_READ, $fname );
 927                 if( ($old=wfFetchObject($res)) && !$confirm ) {
 928                         $skin=$wgUser->getSkin();
 929                         $wgOut->addHTML("<b>".wfMsg("historywarning"));
 930                         $wgOut->addHTML( $skin->historyLink() ."</b>");
 931                 }
 932
 933                 $sql="SELECT cur_text FROM cur WHERE cur_namespace=$ns and cur_title='$etitle'";
 934                 $res=wfQuery($sql, DB_READ, $fname);
 935                 if( ($s=wfFetchObject($res))) {
 936
 937                         # if this is a mini-text, we can paste part of it into the deletion reason
 938
 939                         #if this is empty, an earlier revision may contain "useful" text
 940                         $blanked = false;
 941                         if($s->cur_text!="") {
 942                                 $text=$s->cur_text;
 943                         } else {
 944                                 if($old) {
 945                                         $text = Article::getRevisionText( $old );
 946                                         $blanked = true;
 947                                 }
 948
 949                         }
 950
 951                         $length=strlen($text);
 952
 953                         # this should not happen, since it is not possible to store an empty, new
 954                         # page. Let's insert a standard text in case it does, though
 955                         if($length == 0 && $reason === "") {
 956                                 $reason = wfMsg("exblank");
 957                         }
 958
 959                         if($length < 500 && $reason === "") {
 960
 961                                 # comment field=255, let's grep the first 150 to have some user
 962                                 # space left
 963                                 $text=substr($text,0,150);
 964                                 # let's strip out newlines and HTML tags
 965                                 $text=preg_replace("/\"/","'",$text);
 966                                 $text=preg_replace("/\</","&lt;",$text);
 967                                 $text=preg_replace("/\>/","&gt;",$text);
 968                                 $text=preg_replace("/[\n\r]/","",$text);
 969                                 if(!$blanked) {
 970                                         $reason=wfMsg("excontent"). " '".$text;
 971                                 } else {
 972                                         $reason=wfMsg("exbeforeblank") . " '".$text;
 973                                 }
 974                                 if($length>150) { $reason .= "..."; } # we've only pasted part of the text
 975                                 $reason.="'";
 976                         }
 977                 }
 978
 979                 return $this->confirmDelete( "", $reason );
 980         }
 981
 982         # Output deletion confirmation dialog
 983         function confirmDelete( $par, $reason )
 984         {
 985                 global $wgOut;
 986
 987                 wfDebug( "Article::confirmDelete\n" );
 988
 989                 $sub = htmlspecialchars( $this->mTitle->getPrefixedText() );
 990                 $wgOut->setSubtitle( wfMsg( "deletesub", $sub ) );
 991                 $wgOut->setRobotpolicy( "noindex,nofollow" );
 992                 $wgOut->addWikiText( wfMsg( "confirmdeletetext" ) );
 993
 994                 $formaction = $this->mTitle->escapeLocalURL( "action=delete" . $par );
 995
 996                 $confirm = htmlspecialchars( wfMsg( "confirm" ) );
 997                 $check = htmlspecialchars( wfMsg( "confirmcheck" ) );
 998                 $delcom = htmlspecialchars( wfMsg( "deletecomment" ) );
 999
1000                 $wgOut->addHTML( "
1001 <form id='deleteconfirm' method='post' action=\"{$formaction}\">
1002         <table border='0'>
1003                 <tr>
1004                         <td align='right'>
1005                                 <label for='wpReason'>{$delcom}:</label>
1006                         </td>
1007                         <td align='left'>
1008                                 <input type='text' size='60' name='wpReason' id='wpReason' value=\"" . htmlspecialchars( $reason ) . "\" />
1009                         </td>
1010                 </tr>
1011                 <tr>
1012                         <td>&nbsp;</td>
1013                 </tr>
1014                 <tr>
1015                         <td align='right'>
1016                                 <input type='checkbox' name='wpConfirm' value='1' id='wpConfirm' />
1017                         </td>
1018                         <td>
1019                                 <label for='wpConfirm'>{$check}</label>
1020                         </td>
1021                 </tr>
1022                 <tr>
1023                         <td>&nbsp;</td>
1024                         <td>
1025                                 <input type='submit' name='wpConfirmB' value=\"{$confirm}\" />
1026                         </td>
1027                 </tr>
1028         </table>
1029 </form>\n" );
1030
1031                 $wgOut->returnToMain( false );
1032         }
1033
1034         # Perform a deletion and output success or failure messages
1035         function doDelete( $reason )
1036         {
1037                 global $wgOut, $wgUser, $wgLang;
1038                 $fname = "Article::doDelete";
1039                 wfDebug( "$fname\n" );
1040
1041                 if ( $this->doDeleteArticle( $reason ) ) {
1042                         $deleted = $this->mTitle->getPrefixedText();
1043
1044                         $wgOut->setPagetitle( wfMsg( "actioncomplete" ) );
1045                         $wgOut->setRobotpolicy( "noindex,nofollow" );
1046
1047                         $sk = $wgUser->getSkin();
1048                         $loglink = $sk->makeKnownLink( $wgLang->getNsText(
1049                           Namespace::getWikipedia() ) .
1050                           ":" . wfMsg( "dellogpage" ), wfMsg( "deletionlog" ) );
1051
1052                         $text = wfMsg( "deletedtext", $deleted, $loglink );
1053
1054                         $wgOut->addHTML( "<p>" . $text . "</p>\n" );
1055                         $wgOut->returnToMain( false );
1056                 } else {
1057                         $wgOut->fatalError( wfMsg( "cannotdelete" ) );
1058                 }
1059         }
1060
1061         # Back-end article deletion
1062         # Deletes the article with database consistency, writes logs, purges caches
1063         # Returns success
1064         function doDeleteArticle( $reason )
1065         {
1066                 global $wgUser, $wgLang;
1067                 global  $wgUseSquid, $wgDeferredUpdateList, $wgInternalServer;
1068
1069                 $fname = "Article::doDeleteArticle";
1070                 wfDebug( "$fname\n" );
1071
1072                 $ns = $this->mTitle->getNamespace();
1073                 $t = wfStrencode( $this->mTitle->getDBkey() );
1074                 $id = $this->mTitle->getArticleID();
1075
1076                 if ( "" == $t || $id == 0 ) {
1077                         return false;
1078                 }
1079
1080                 $u = new SiteStatsUpdate( 0, 1, -$this->isCountable( $this->getContent( true ) ) );
1081                 array_push( $wgDeferredUpdateList, $u );
1082
1083                 $linksTo = $this->mTitle->getLinksTo();
1084
1085                 # Squid purging
1086                 if ( $wgUseSquid ) {
1087                         $urls = array(
1088                                 $this->mTitle->getInternalURL(),
1089                                 $this->mTitle->getInternalURL( "history" )
1090                         );
1091                         foreach ( $linksTo as $linkTo ) {
1092                                 $urls[] = $linkTo->getInternalURL();
1093                         }
1094
1095                         $u = new SquidUpdate( $urls );
1096                         array_push( $wgDeferredUpdateList, $u );
1097
1098                 }
1099
1100                 # Client and file cache invalidation
1101                 Title::touchArray( $linksTo );
1102
1103                 # Move article and history to the "archive" table
1104                 $sql = "INSERT INTO archive (ar_namespace,ar_title,ar_text," .
1105                   "ar_comment,ar_user,ar_user_text,ar_timestamp,ar_minor_edit," .
1106                   "ar_flags) SELECT cur_namespace,cur_title,cur_text,cur_comment," .
1107                   "cur_user,cur_user_text,cur_timestamp,cur_minor_edit,0 FROM cur " .
1108                   "WHERE cur_namespace={$ns} AND cur_title='{$t}'";
1109                 wfQuery( $sql, DB_WRITE, $fname );
1110
1111                 $sql = "INSERT INTO archive (ar_namespace,ar_title,ar_text," .
1112                   "ar_comment,ar_user,ar_user_text,ar_timestamp,ar_minor_edit," .
1113                   "ar_flags) SELECT old_namespace,old_title,old_text,old_comment," .
1114                   "old_user,old_user_text,old_timestamp,old_minor_edit,old_flags " .
1115                   "FROM old WHERE old_namespace={$ns} AND old_title='{$t}'";
1116                 wfQuery( $sql, DB_WRITE, $fname );
1117
1118                 # Now that it's safely backed up, delete it
1119
1120                 $sql = "DELETE FROM cur WHERE cur_namespace={$ns} AND " .
1121                   "cur_title='{$t}'";
1122                 wfQuery( $sql, DB_WRITE, $fname );
1123
1124                 $sql = "DELETE FROM old WHERE old_namespace={$ns} AND " .
1125                   "old_title='{$t}'";
1126                 wfQuery( $sql, DB_WRITE, $fname );
1127
1128                 $sql = "DELETE FROM recentchanges WHERE rc_namespace={$ns} AND " .
1129                   "rc_title='{$t}'";
1130                 wfQuery( $sql, DB_WRITE, $fname );
1131
1132                 # Finally, clean up the link tables
1133                 $t = wfStrencode( $this->mTitle->getPrefixedDBkey() );
1134
1135                 Article::onArticleDelete( $this->mTitle );
1136
1137                 $sql = "INSERT INTO brokenlinks (bl_from,bl_to) VALUES ";
1138                 $first = true;
1139
1140                 foreach ( $linksTo as $titleObj ) {
1141                         if ( ! $first ) { $sql .= ","; }
1142                         $first = false;
1143                         # Get article ID. Efficient because it was loaded into the cache by getLinksTo().
1144                         $linkID = $titleObj->getArticleID();
1145                         $sql .= "({$linkID},'{$t}')";
1146                 }
1147                 if ( ! $first ) {
1148                         wfQuery( $sql, DB_WRITE, $fname );
1149                 }
1150
1151                 $sql = "DELETE FROM links WHERE l_to={$id}";
1152                 wfQuery( $sql, DB_WRITE, $fname );
1153
1154                 $sql = "DELETE FROM links WHERE l_from={$id}";
1155                 wfQuery( $sql, DB_WRITE, $fname );
1156
1157                 $sql = "DELETE FROM imagelinks WHERE il_from={$id}";
1158                 wfQuery( $sql, DB_WRITE, $fname );
1159
1160                 $sql = "DELETE FROM brokenlinks WHERE bl_from={$id}";
1161                 wfQuery( $sql, DB_WRITE, $fname );
1162
1163                 $log = new LogPage( wfMsg( "dellogpage" ), wfMsg( "dellogpagetext" ) );
1164                 $art = $this->mTitle->getPrefixedText();
1165                 $log->addEntry( wfMsg( "deletedarticle", $art ), $reason );
1166
1167                 # Clear the cached article id so the interface doesn't act like we exist
1168                 $this->mTitle->resetArticleID( 0 );
1169                 $this->mTitle->mArticleID = 0;
1170                 return true;
1171         }
1172
1173         function rollback()
1174         {
1175                 global $wgUser, $wgLang, $wgOut, $wgRequest;
1176
1177                 if ( ! $wgUser->isSysop() ) {
1178                         $wgOut->sysopRequired();
1179                         return;
1180                 }
1181                 if ( wfReadOnly() ) {
1182                         $wgOut->readOnlyPage( $this->getContent() );
1183                         return;
1184                 }
1185
1186                 # Enhanced rollback, marks edits rc_bot=1
1187                 $bot = $wgRequest->getBool( 'bot' );
1188
1189                 # Replace all this user's current edits with the next one down
1190                 $tt = wfStrencode( $this->mTitle->getDBKey() );
1191                 $n = $this->mTitle->getNamespace();
1192
1193                 # Get the last editor
1194                 $sql = "SELECT cur_id,cur_user,cur_user_text,cur_comment FROM cur WHERE cur_title='{$tt}' AND cur_namespace={$n}";
1195                 $res = wfQuery( $sql, DB_READ );
1196                 if( ($x = wfNumRows( $res )) != 1 ) {
1197                         # Something wrong
1198                         $wgOut->addHTML( wfMsg( "notanarticle" ) );
1199                         return;
1200                 }
1201                 $s = wfFetchObject( $res );
1202                 $ut = wfStrencode( $s->cur_user_text );
1203                 $uid = $s->cur_user;
1204                 $pid = $s->cur_id;
1205
1206                 $from = str_replace( '_', ' ', $wgRequest->getVal( "from" ) );
1207                 if( $from != $s->cur_user_text ) {
1208                         $wgOut->setPageTitle(wfmsg("rollbackfailed"));
1209                         $wgOut->addWikiText( wfMsg( "alreadyrolled",
1210                                 htmlspecialchars( $this->mTitle->getPrefixedText()),
1211                                 htmlspecialchars( $from ),
1212                                 htmlspecialchars( $s->cur_user_text ) ) );
1213                         if($s->cur_comment != "") {
1214                                 $wgOut->addHTML(
1215                                         wfMsg("editcomment",
1216                                         htmlspecialchars( $s->cur_comment ) ) );
1217                         }
1218                         return;
1219                 }
1220
1221                 # Get the last edit not by this guy
1222                 $sql = "SELECT old_text,old_user,old_user_text,old_timestamp,old_flags
1223                 FROM old USE INDEX (name_title_timestamp)
1224                 WHERE old_namespace={$n} AND old_title='{$tt}'
1225                 AND (old_user <> {$uid} OR old_user_text <> '{$ut}')
1226                 ORDER BY inverse_timestamp LIMIT 1";
1227                 $res = wfQuery( $sql, DB_READ );
1228                 if( wfNumRows( $res ) != 1 ) {
1229                         # Something wrong
1230                         $wgOut->setPageTitle(wfMsg("rollbackfailed"));
1231                         $wgOut->addHTML( wfMsg( "cantrollback" ) );
1232                         return;
1233                 }
1234                 $s = wfFetchObject( $res );
1235
1236                 if ( $bot ) {
1237                         # Mark all reverted edits as bot
1238                         $sql = "UPDATE recentchanges SET rc_bot=1 WHERE
1239                                 rc_cur_id=$pid AND rc_user=$uid AND rc_timestamp > '{$s->old_timestamp}'";
1240                         wfQuery( $sql, DB_WRITE, $fname );
1241                 }
1242
1243                 # Save it!
1244                 $newcomment = wfMsg( "revertpage", $s->old_user_text, $from );
1245                 $wgOut->setPagetitle( wfMsg( "actioncomplete" ) );
1246                 $wgOut->setRobotpolicy( "noindex,nofollow" );
1247                 $wgOut->addHTML( "<h2>" . $newcomment . "</h2>\n<hr />\n" );
1248                 $this->updateArticle( Article::getRevisionText( $s ), $newcomment, 1, $this->mTitle->userIsWatching(), $bot );
1249                 Article::onArticleEdit( $this->mTitle );
1250                 $wgOut->returnToMain( false );
1251         }
1252
1253
1254         # Do standard deferred updates after page view
1255
1256         /* private */ function viewUpdates()
1257         {
1258                 global $wgDeferredUpdateList;
1259                 if ( 0 != $this->getID() ) {
1260                         global $wgDisableCounters;
1261                         if( !$wgDisableCounters ) {
1262                                 Article::incViewCount( $this->getID() );
1263                                 $u = new SiteStatsUpdate( 1, 0, 0 );
1264                                 array_push( $wgDeferredUpdateList, $u );
1265                         }
1266                         $u = new UserTalkUpdate( 0, $this->mTitle->getNamespace(),
1267                           $this->mTitle->getDBkey() );
1268                         array_push( $wgDeferredUpdateList, $u );
1269                 }
1270         }
1271
1272         # Do standard deferred updates after page edit.
1273         # Every 1000th edit, prune the recent changes table.
1274
1275         /* private */ function editUpdates( $text )
1276         {
1277                 global $wgDeferredUpdateList, $wgDBname, $wgMemc;
1278                 global $wgMessageCache;
1279
1280                 wfSeedRandom();
1281                 if ( 0 == mt_rand( 0, 999 ) ) {
1282                         $cutoff = wfUnix2Timestamp( time() - ( 7 * 86400 ) );
1283                         $sql = "DELETE FROM recentchanges WHERE rc_timestamp < '{$cutoff}'";
1284                         wfQuery( $sql, DB_WRITE );
1285                 }
1286                 $id = $this->getID();
1287                 $title = $this->mTitle->getPrefixedDBkey();
1288                 $shortTitle = $this->mTitle->getDBkey();
1289
1290                 $adj = $this->mCountAdjustment;
1291
1292                 if ( 0 != $id ) {
1293                         $u = new LinksUpdate( $id, $title );
1294                         array_push( $wgDeferredUpdateList, $u );
1295                         $u = new SiteStatsUpdate( 0, 1, $adj );
1296                         array_push( $wgDeferredUpdateList, $u );
1297                         $u = new SearchUpdate( $id, $title, $text );
1298                         array_push( $wgDeferredUpdateList, $u );
1299
1300                         $u = new UserTalkUpdate( 1, $this->mTitle->getNamespace(), $shortTitle );
1301                         array_push( $wgDeferredUpdateList, $u );
1302
1303                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
1304                                 $wgMessageCache->replace( $shortTitle, $text );
1305                         }
1306                 }
1307         }
1308
1309         /* private */ function setOldSubtitle()
1310         {
1311                 global $wgLang, $wgOut;
1312
1313                 $td = $wgLang->timeanddate( $this->mTimestamp, true );
1314                 $r = wfMsg( "revisionasof", $td );
1315                 $wgOut->setSubtitle( "({$r})" );
1316         }
1317
1318         # This function is called right before saving the wikitext,
1319         # so we can do things like signatures and links-in-context.
1320
1321         function preSaveTransform( $text )
1322         {
1323                 global $wgParser, $wgUser;
1324                 return $wgParser->preSaveTransform( $text, $this->mTitle, $wgUser, ParserOptions::newFromUser( $wgUser ) );
1325         }
1326
1327         /* Caching functions */
1328
1329         # checkLastModified returns true if it has taken care of all
1330         # output to the client that is necessary for this request.
1331         # (that is, it has sent a cached version of the page)
1332         function tryFileCache() {
1333                 static $called = false;
1334                 if( $called ) {
1335                         wfDebug( " tryFileCache() -- called twice!?\n" );
1336                         return;
1337                 }
1338                 $called = true;
1339                 if($this->isFileCacheable()) {
1340                         $touched = $this->mTouched;
1341                         if( $this->mTitle->getPrefixedDBkey() == wfMsg( "mainpage" ) ) {
1342                                 # Expire the main page quicker
1343                                 $expire = wfUnix2Timestamp( time() - 3600 );
1344                                 $touched = max( $expire, $touched );
1345                         }
1346                         $cache = new CacheManager( $this->mTitle );
1347                         if($cache->isFileCacheGood( $touched )) {
1348                                 global $wgOut;
1349                                 wfDebug( " tryFileCache() - about to load\n" );
1350                                 $cache->loadFromFileCache();
1351                                 return true;
1352                         } else {
1353                                 wfDebug( " tryFileCache() - starting buffer\n" );
1354                                 ob_start( array(&$cache, 'saveToFileCache' ) );
1355                         }
1356                 } else {
1357                         wfDebug( " tryFileCache() - not cacheable\n" );
1358                 }
1359         }
1360
1361         function isFileCacheable() {
1362                 global $wgUser, $wgUseFileCache, $wgShowIPinHeader, $wgRequest;
1363                 extract( $wgRequest->getValues( 'action', 'oldid', 'diff', 'redirect', 'printable' ) );
1364
1365                 return $wgUseFileCache
1366                         and (!$wgShowIPinHeader)
1367                         and ($this->getID() != 0)
1368                         and ($wgUser->getId() == 0)
1369                         and (!$wgUser->getNewtalk())
1370                         and ($this->mTitle->getNamespace() != Namespace::getSpecial())
1371                         and ($action == "view")
1372                         and (!isset($oldid))
1373                         and (!isset($diff))
1374                         and (!isset($redirect))
1375                         and (!isset($printable))
1376                         and (!$this->mRedirectedFrom);
1377         }
1378
1379         function checkTouched() {
1380                 $id = $this->getID();
1381                 $sql = "SELECT cur_touched,cur_is_redirect FROM cur WHERE cur_id=$id";
1382                 $res = wfQuery( $sql, DB_READ, "Article::checkTouched" );
1383                 if( $s = wfFetchObject( $res ) ) {
1384                         $this->mTouched = $s->cur_touched;
1385                         return !$s->cur_is_redirect;
1386                 } else {
1387                         return false;
1388                 }
1389         }
1390
1391         /* static */ function incViewCount( $id )
1392         {
1393                 $id = intval( $id );
1394                 global $wgHitcounterUpdateFreq;
1395
1396                 if( $wgHitcounterUpdateFreq <= 1 ){ //
1397                         wfQuery("UPDATE cur SET cur_counter = cur_counter + 1 " .
1398                                 "WHERE cur_id = $id", DB_WRITE);
1399                         return;
1400                 }
1401
1402                 # Not important enough to warrant an error page in case of failure
1403                 $oldignore = wfIgnoreSQLErrors( true );
1404
1405                 wfQuery("INSERT INTO hitcounter (hc_id) VALUES ({$id})", DB_WRITE);
1406
1407                 $checkfreq = intval( $wgHitcounterUpdateFreq/25 + 1 );
1408                 if( (rand() % $checkfreq != 0) or (wfLastErrno() != 0) ){
1409                         # Most of the time (or on SQL errors), skip row count check
1410                         wfIgnoreSQLErrors( $oldignore );
1411                         return;
1412                 }
1413
1414                 $res = wfQuery("SELECT COUNT(*) as n FROM hitcounter", DB_WRITE);
1415                 $row = wfFetchObject( $res );
1416                 $rown = intval( $row->n );
1417                 if( $rown >= $wgHitcounterUpdateFreq ){
1418                         wfProfileIn( "Article::incViewCount-collect" );
1419                         $old_user_abort = ignore_user_abort( true );
1420
1421                         wfQuery("LOCK TABLES hitcounter WRITE", DB_WRITE);
1422                         wfQuery("CREATE TEMPORARY TABLE acchits TYPE=HEAP ".
1423                                 "SELECT hc_id,COUNT(*) AS hc_n FROM hitcounter ".
1424                                 "GROUP BY hc_id", DB_WRITE);
1425                         wfQuery("DELETE FROM hitcounter", DB_WRITE);
1426                         wfQuery("UNLOCK TABLES", DB_WRITE);
1427                         wfQuery("UPDATE cur,acchits SET cur_counter=cur_counter + hc_n ".
1428                                 "WHERE cur_id = hc_id", DB_WRITE);
1429                         wfQuery("DROP TABLE acchits", DB_WRITE);
1430
1431                         ignore_user_abort( $old_user_abort );
1432                         wfProfileOut( "Article::incViewCount-collect" );
1433                 }
1434                 wfIgnoreSQLErrors( $oldignore );
1435         }
1436
1437         # The onArticle*() functions are supposed to be a kind of hooks
1438         # which should be called whenever any of the specified actions
1439         # are done.
1440         #
1441         # This is a good place to put code to clear caches, for instance.
1442
1443         # This is called on page move and undelete, as well as edit
1444         /* static */ function onArticleCreate($title_obj){
1445                 global $wgEnablePersistentLC, $wgEnableParserCache, $wgUseSquid, $wgDeferredUpdateList;
1446
1447                 $titles = $title_obj->getBrokenLinksTo();
1448
1449                 # Purge squid
1450                 if ( $wgUseSquid ) {
1451                         $urls = $title_obj->getSquidURLs();
1452                         foreach ( $titles as $linkTitle ) {
1453                                 $urls[] = $linkTitle->getInternalURL();
1454                         }
1455                         $u = new SquidUpdate( $urls );
1456                         array_push( $wgDeferredUpdateList, $u );
1457                 }
1458
1459                 # Clear persistent link cache
1460                 if ( $wgEnablePersistentLC ) {
1461                         LinkCache::linksccClearBrokenLinksTo( $title_obj->getPrefixedDBkey() );
1462                 }
1463
1464                 # Clear parser cache (not really used)
1465                 if ( $wgEnableParserCache ) {
1466                         OutputPage::parsercacheClearBrokenLinksTo( $title_obj->getPrefixedDBkey() );
1467                 }
1468         }
1469
1470         /* static */ function onArticleDelete($title_obj){
1471                 global $wgEnablePersistentLC, $wgEnableParserCache;
1472                 if ( $wgEnablePersistentLC ) {
1473                         LinkCache::linksccClearLinksTo( $title_obj->getArticleID() );
1474                 }
1475                 if ( $wgEnableParserCache ) {
1476                         OutputPage::parsercacheClearLinksTo( $title_obj->getArticleID() );
1477                 }
1478         }
1479
1480         /* static */ function onArticleEdit($title_obj){
1481                 global $wgEnablePersistentLC, $wgEnableParserCache;
1482                 if ( $wgEnablePersistentLC ) {
1483                         LinkCache::linksccClearPage( $title_obj->getArticleID() );
1484                 }
1485                 if ( $wgEnableParserCache ) {
1486                         OutputPage::parsercacheClearPage( $title_obj->getArticleID(), $title_obj->getNamespace() );
1487                 }
1488         }
1489 }
1490
1491 ?>