includes/Article.php

   1 <?php
   2 /**
   3  * File for articles
   4  * @package MediaWiki
   5  */
   6
   7 /**
   8  * Need the CacheManager to be loaded
   9  */
  10 require_once( 'CacheManager.php' );
  11 require_once( 'Revision.php' );
  12
  13 $wgArticleCurContentFields = false;
  14 $wgArticleOldContentFields = false;
  15
  16 /**
  17  * Class representing a Wikipedia article and history.
  18  *
  19  * See design.doc for an overview.
  20  * Note: edit user interface and cache support functions have been
  21  * moved to separate EditPage and CacheManager classes.
  22  *
  23  * @package MediaWiki
  24  */
  25 class Article {
  26         /**#@+
  27          * @access private
  28          */
  29         var $mContent, $mContentLoaded;
  30         var $mUser, $mTimestamp, $mUserText;
  31         var $mCounter, $mComment, $mCountAdjustment;
  32         var $mMinorEdit, $mRedirectedFrom;
  33         var $mTouched, $mFileCache, $mTitle;
  34         var $mId, $mTable;
  35         var $mForUpdate;
  36         var $mOldId;
  37         /**#@-*/
  38
  39         /**
  40          * Constructor and clear the article
  41          * @param mixed &$title
  42          */
  43         function Article( &$title ) {
  44                 $this->mTitle =& $title;
  45                 $this->clear();
  46         }
  47
  48         /**
  49           * Clear the object
  50           * @private
  51           */
  52         function clear() {
  53                 $this->mContentLoaded = false;
  54                 $this->mCurID = $this->mUser = $this->mCounter = -1; # Not loaded
  55                 $this->mRedirectedFrom = $this->mUserText =
  56                 $this->mTimestamp = $this->mComment = $this->mFileCache = '';
  57                 $this->mCountAdjustment = 0;
  58                 $this->mTouched = '19700101000000';
  59                 $this->mForUpdate = false;
  60         }
  61
  62         /**
  63          * Note that getContent/loadContent may follow redirects if
  64          * not told otherwise, and so may cause a change to mTitle.
  65          *
  66          * @param $noredir
  67          * @return Return the text of this revision
  68         */
  69         function getContent( $noredir ) {
  70                 global $wgRequest;
  71
  72                 # Get variables from query string :P
  73                 $action = $wgRequest->getText( 'action', 'view' );
  74                 $section = $wgRequest->getText( 'section' );
  75
  76                 $fname =  'Article::getContent';
  77                 wfProfileIn( $fname );
  78
  79                 if ( 0 == $this->getID() ) {
  80                         if ( 'edit' == $action ) {
  81                                 wfProfileOut( $fname );
  82                                 return ''; # was "newarticletext", now moved above the box)
  83                         }
  84                         wfProfileOut( $fname );
  85                         return wfMsg( 'noarticletext' );
  86                 } else {
  87                         $this->loadContent( $noredir );
  88                         # check if we're displaying a [[User talk:x.x.x.x]] anonymous talk page
  89                         if ( $this->mTitle->getNamespace() == NS_USER_TALK &&
  90                           preg_match('/^\d{1,3}\.\d{1,3}.\d{1,3}\.\d{1,3}$/',$this->mTitle->getText()) &&
  91                           $action=='view'
  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 $this->mContent;
 112                         }
 113                 }
 114         }
 115
 116         /**
 117          * This function returns the text of a section, specified by a number ($section).
 118          * A section is text under a heading like == Heading == or <h1>Heading</h1>, or
 119          * the first section before any such heading (section 0).
 120          *
 121          * If a section contains subsections, these are also returned.
 122          *
 123          * @param string $text text to look in
 124          * @param integer $section section number
 125          * @return string text of the requested section
 126          */
 127         function getSection($text,$section) {
 128
 129                 # strip NOWIKI etc. to avoid confusion (true-parameter causes HTML
 130                 # comments to be stripped as well)
 131                 $striparray=array();
 132                 $parser=new Parser();
 133                 $parser->mOutputType=OT_WIKI;
 134                 $striptext=$parser->strip($text, $striparray, true);
 135
 136                 # now that we can be sure that no pseudo-sections are in the source,
 137                 # split it up by section
 138                 $secs =
 139                   preg_split(
 140                   '/(^=+.+?=+|^<h[1-6].*?' . '>.*?<\/h[1-6].*?' . '>)(?!\S)/mi',
 141                   $striptext, -1,
 142                   PREG_SPLIT_DELIM_CAPTURE);
 143                 if($section==0) {
 144                         $rv=$secs[0];
 145                 } else {
 146                         $headline=$secs[$section*2-1];
 147                         preg_match( '/^(=+).+?=+|^<h([1-6]).*?' . '>.*?<\/h[1-6].*?' . '>(?!\S)/mi',$headline,$matches);
 148                         $hlevel=$matches[1];
 149
 150                         # translate wiki heading into level
 151                         if(strpos($hlevel,'=')!==false) {
 152                                 $hlevel=strlen($hlevel);
 153                         }
 154
 155                         $rv=$headline. $secs[$section*2];
 156                         $count=$section+1;
 157
 158                         $break=false;
 159                         while(!empty($secs[$count*2-1]) && !$break) {
 160
 161                                 $subheadline=$secs[$count*2-1];
 162                                 preg_match( '/^(=+).+?=+|^<h([1-6]).*?' . '>.*?<\/h[1-6].*?' . '>(?!\S)/mi',$subheadline,$matches);
 163                                 $subhlevel=$matches[1];
 164                                 if(strpos($subhlevel,'=')!==false) {
 165                                         $subhlevel=strlen($subhlevel);
 166                                 }
 167                                 if($subhlevel > $hlevel) {
 168                                         $rv.=$subheadline.$secs[$count*2];
 169                                 }
 170                                 if($subhlevel <= $hlevel) {
 171                                         $break=true;
 172                                 }
 173                                 $count++;
 174
 175                         }
 176                 }
 177                 # reinsert stripped tags
 178                 $rv=$parser->unstrip($rv,$striparray);
 179                 $rv=$parser->unstripNoWiki($rv,$striparray);
 180                 $rv=trim($rv);
 181                 return $rv;
 182
 183         }
 184
 185         /**
 186          * Return an array of the columns of the "cur"-table
 187          */
 188         function getContentFields() {
 189                 return $wgArticleContentFields = array(
 190                   'old_text','old_flags',
 191                   'rev_timestamp','rev_user', 'rev_user_text', 'rev_comment','page_counter',
 192                   'page_namespace', 'page_title', 'page_restrictions','page_touched','page_is_redirect' );
 193         }
 194
 195         /**
 196          * Return the oldid of the article that is to be shown.
 197          * For requests with a "direction", this is not the oldid of the
 198          * query
 199          */
 200         function getOldID() {
 201                 global $wgRequest, $wgOut;
 202                 static $lastid;
 203
 204                 if ( isset( $lastid ) ) {
 205                         return $lastid;
 206                 }
 207                 # Query variables :P
 208                 $oldid = $wgRequest->getVal( 'oldid' );
 209                 if ( isset( $oldid ) ) {
 210                         $dbr =& $this->getDB();
 211                         $oldid = IntVal( $oldid );
 212                         if ( $wgRequest->getVal( 'direction' ) == 'next' ) {
 213                                 $nextid = $this->mTitle->getNextRevisionID( $oldid );
 214                                 if ( $nextid  ) {
 215                                         $oldid = $nextid;
 216                                 } else {
 217                                         $wgOut->redirect( $this->mTitle->getFullURL( 'redirect=no' ) );
 218                                 }
 219                         } elseif ( $wgRequest->getVal( 'direction' ) == 'prev' ) {
 220                                 $previd = $this->mTitle->getPreviousRevisionID( $oldid );
 221                                 if ( $previd ) {
 222                                         $oldid = $previd;
 223                                 } else {
 224                                         # TODO
 225                                 }
 226                         }
 227                         $lastid = $oldid;
 228                 }
 229                 return @$oldid; # "@" to be able to return "unset" without PHP complaining
 230         }
 231
 232
 233         /**
 234          * Load the revision (including cur_text) into this object
 235          */
 236         function loadContent( $noredir = false ) {
 237                 global $wgOut, $wgRequest;
 238
 239                 if ( $this->mContentLoaded ) return;
 240
 241                 $dbr =& $this->getDB();
 242                 # Query variables :P
 243                 $oldid = $this->getOldID();
 244                 $redirect = $wgRequest->getVal( 'redirect' );
 245
 246                 $fname = 'Article::loadContent';
 247
 248                 # Pre-fill content with error message so that if something
 249                 # fails we'll have something telling us what we intended.
 250
 251                 $t = $this->mTitle->getPrefixedText();
 252
 253                 $noredir = $noredir || ($wgRequest->getVal( 'redirect' ) == 'no');
 254                 $this->mOldId = $oldid;
 255                 $this->fetchContent( $oldid, $noredir, true );
 256         }
 257
 258         /**
 259          * @param int $oldid 0 for whatever the latest revision is
 260          * @param bool $noredir Set to true to avoid following redirects
 261          * @param bool $globalTitle Set to true to change the global $wgTitle object when following redirects or other unexpected title changes
 262          * @return string
 263          */
 264         function fetchContent( $oldid = 0, $noredir = false, $globalTitle = false ) {
 265                 if ( $this->mContentLoaded ) {
 266                         return $this->mContent;
 267                 }
 268                 $dbr =& $this->getDB();
 269                 $fname = 'Article::fetchContent';
 270
 271                 # Pre-fill content with error message so that if something
 272                 # fails we'll have something telling us what we intended.
 273                 $t = $this->mTitle->getPrefixedText();
 274                 if( $oldid ) {
 275                         $t .= ',oldid='.$oldid;
 276                 }
 277                 if( isset( $redirect ) ) {
 278                         $redirect = ($redirect == 'no') ? 'no' : 'yes';
 279                         $t .= ',redirect='.$redirect;
 280                 }
 281                 $this->mContent = wfMsg( 'missingarticle', $t );
 282
 283                 if( !$oldid ) {
 284                         # Retrieve current version
 285                         $id = $this->getID();
 286                         if ( 0 == $id ) {
 287                                 return false;
 288                         }
 289
 290                         $s = $dbr->selectRow( array( 'text', 'revision', 'page' ),
 291                                 $this->getContentFields(),
 292                                 "page_id='$id' AND rev_page=page_id AND rev_id=page_latest AND old_id=rev_id",
 293                                 $fname, $this->getSelectOptions() );
 294                 } else {
 295                         # Historical revision
 296                         $s = $dbr->selectRow( array( 'text', 'revision', 'page' ),
 297                                 $this->getContentFields(),
 298                                 "rev_page=page_id AND rev_id='$oldid' AND old_id=rev_id",
 299                                 $fname, $this->getSelectOptions() );
 300                 }
 301                 if ( $s === false ) {
 302                         return false;
 303                 }
 304
 305                 # If we got a redirect, follow it (unless we've been told
 306                 # not to by either the function parameter or the query
 307                 if ( !$oldid && !$noredir ) {
 308                         $rt = Title::newFromRedirect( Revision::getRevisionText( $s ) );
 309                         # process if title object is valid and not special:userlogout
 310                         if ( $rt && ! ( $rt->getNamespace() == NS_SPECIAL && $rt->getText() == 'Userlogout' ) ) {
 311                                 # Gotta hand redirects to special pages differently:
 312                                 # Fill the HTTP response "Location" header and ignore
 313                                 # the rest of the page we're on.
 314                                 if( $globalTitle ) {
 315                                         global $wgOut;
 316                                         if ( $rt->getInterwiki() != '' ) {
 317                                                 $wgOut->redirect( $rt->getFullURL() ) ;
 318                                                 return false;
 319                                         }
 320                                         if ( $rt->getNamespace() == NS_SPECIAL ) {
 321                                                 $wgOut->redirect( $rt->getFullURL() );
 322                                                 return false;
 323                                         }
 324                                 }
 325                                 $rid = $rt->getArticleID();
 326                                 if ( 0 != $rid ) {
 327                                         $redirRow = $dbr->selectRow( array( 'text', 'revision', 'page' ),
 328                                                 $this->getContentFields(),
 329                                                 "page_id='$rid' AND rev_page=page_id AND rev_id=page_latest AND old_id=rev_id",
 330                                                 $fname, $this->getSelectOptions() );
 331
 332                                         if ( $redirRow !== false ) {
 333                                                 $this->mRedirectedFrom = $this->mTitle->getPrefixedText();
 334                                                 $this->mTitle = $rt;
 335                                                 $s = $redirRow;
 336                                         }
 337                                 }
 338                         }
 339                 }
 340
 341                 # if the title's different from expected, update...
 342                 if( $globalTitle &&
 343                         ( $this->mTitle->getNamespace() != $s->page_namespace ||
 344                         $this->mTitle->getDBkey() != $s->page_title ) ) {
 345                         $oldTitle = Title::makeTitle( $s->page_namesapce, $s->page_title );
 346                         $this->mTitle = $oldTitle;
 347                         global $wgTitle;
 348                         $wgTitle = $oldTitle;
 349                 }
 350
 351                 # Back to the business at hand...
 352                 $this->mCounter = $s->page_counter;
 353                 $this->mTitle->mRestrictions = explode( ',', trim( $s->page_restrictions ) );
 354                 $this->mTitle->mRestrictionsLoaded = true;
 355                 $this->mTouched = wfTimestamp( TS_MW, $s->page_touched );
 356
 357                 $this->mContent = Revision::getRevisionText( $s );
 358
 359                 $this->mUser = $s->rev_user;
 360                 $this->mUserText = $s->rev_user_text;
 361                 $this->mComment = $s->rev_comment;
 362                 $this->mTimestamp = wfTimestamp( TS_MW, $s->rev_timestamp );
 363
 364                 $this->mContentLoaded = true;
 365                 return $this->mContent;
 366         }
 367
 368         /**
 369          * Gets the article text without using so many damn globals
 370          * Returns false on error
 371          *
 372          * @param integer $oldid
 373          */
 374         function getContentWithoutUsingSoManyDamnGlobals( $oldid = 0, $noredir = false ) {
 375                 return $this->fetchContent( $oldid, $noredir, false );
 376         }
 377
 378         /**
 379          * Read/write accessor to select FOR UPDATE
 380          */
 381         function forUpdate( $x = NULL ) {
 382                 return wfSetVar( $this->mForUpdate, $x );
 383         }
 384
 385         /**
 386          * Get the database which should be used for reads
 387          */
 388         function &getDB() {
 389                 if ( $this->mForUpdate ) {
 390                         return wfGetDB( DB_MASTER );
 391                 } else {
 392                         return wfGetDB( DB_SLAVE );
 393                 }
 394         }
 395
 396         /**
 397          * Get options for all SELECT statements
 398          * Can pass an option array, to which the class-wide options will be appended
 399          */
 400         function getSelectOptions( $options = '' ) {
 401                 if ( $this->mForUpdate ) {
 402                         if ( $options ) {
 403                                 $options[] = 'FOR UPDATE';
 404                         } else {
 405                                 $options = 'FOR UPDATE';
 406                         }
 407                 }
 408                 return $options;
 409         }
 410
 411         /**
 412          * Return the Article ID
 413          */
 414         function getID() {
 415                 if( $this->mTitle ) {
 416                         return $this->mTitle->getArticleID();
 417                 } else {
 418                         return 0;
 419                 }
 420         }
 421
 422         /**
 423          * Get the view count for this article
 424          */
 425         function getCount() {
 426                 if ( -1 == $this->mCounter ) {
 427                         $id = $this->getID();
 428                         $dbr =& $this->getDB();
 429                         $this->mCounter = $dbr->selectField( 'page', 'page_counter', array( 'page_id' => $id ),
 430                                 'Article::getCount', $this->getSelectOptions() );
 431                 }
 432                 return $this->mCounter;
 433         }
 434
 435         /**
 436          * Would the given text make this article a "good" article (i.e.,
 437          * suitable for including in the article count)?
 438          */
 439         function isCountable( $text ) {
 440                 global $wgUseCommaCount;
 441
 442                 if ( 0 != $this->mTitle->getNamespace() ) { return 0; }
 443                 if ( $this->isRedirect( $text ) ) { return 0; }
 444                 $token = ($wgUseCommaCount ? ',' : '[[' );
 445                 if ( false === strstr( $text, $token ) ) { return 0; }
 446                 return 1;
 447         }
 448
 449         /**
 450          * Tests if the article text represents a redirect
 451          */
 452         function isRedirect( $text = false ) {
 453                 if ( $text === false ) {
 454                         $this->loadContent();
 455                         $titleObj = Title::newFromRedirect( $this->mText );
 456                 } else {
 457                         $titleObj = Title::newFromRedirect( $text );
 458                 }
 459                 return $titleObj !== NULL;
 460         }
 461
 462         /**
 463          * Loads everything except the text
 464          * This isn't necessary for all uses, so it's only done if needed.
 465          * @private
 466          */
 467         function loadLastEdit() {
 468                 global $wgOut;
 469
 470                 if ( -1 != $this->mUser )
 471                         return;
 472
 473                 $fname = 'Article::loadLastEdit';
 474
 475                 $dbr =& $this->getDB();
 476                 $s = $dbr->selectRow( array( 'revision', 'page') ,
 477                   array( 'rev_user','rev_user_text','rev_timestamp', 'rev_comment','rev_minor_edit' ),
 478                   array( 'page_id' => $this->getID(), 'page_latest=rev_id' ), $fname, $this->getSelectOptions() );
 479
 480                 if ( $s !== false ) {
 481                         $this->mUser = $s->rev_user;
 482                         $this->mUserText = $s->rev_user_text;
 483                         $this->mTimestamp = wfTimestamp(TS_MW,$s->rev_timestamp);
 484                         $this->mComment = $s->rev_comment;
 485                         $this->mMinorEdit = $s->rev_minor_edit;
 486                 }
 487         }
 488
 489         function getTimestamp() {
 490                 $this->loadLastEdit();
 491                 return $this->mTimestamp;
 492         }
 493
 494         function getUser() {
 495                 $this->loadLastEdit();
 496                 return $this->mUser;
 497         }
 498
 499         function getUserText() {
 500                 $this->loadLastEdit();
 501                 return $this->mUserText;
 502         }
 503
 504         function getComment() {
 505                 $this->loadLastEdit();
 506                 return $this->mComment;
 507         }
 508
 509         function getMinorEdit() {
 510                 $this->loadLastEdit();
 511                 return $this->mMinorEdit;
 512         }
 513
 514         function getContributors($limit = 0, $offset = 0) {
 515                 $fname = 'Article::getContributors';
 516
 517                 # XXX: this is expensive; cache this info somewhere.
 518
 519                 $title = $this->mTitle;
 520                 $contribs = array();
 521                 $dbr =& $this->getDB();
 522                 $revTable = $dbr->tableName( 'revision' );
 523                 $userTable = $dbr->tableName( 'user' );
 524                 $encDBkey = $dbr->addQuotes( $title->getDBkey() );
 525                 $ns = $title->getNamespace();
 526                 $user = $this->getUser();
 527
 528                 $sql = "SELECT rev_user, rev_user_text, user_real_name, MAX(rev_timestamp) as timestamp
 529                         FROM $revTable LEFT JOIN $userTable ON rev_user = user_id
 530                         WHERE rev_page = $pageId
 531                         AND old_user != $user
 532                         GROUP BY rev_user, rev_user_text, user_real_name
 533                         ORDER BY timestamp DESC";
 534
 535                 if ($limit > 0) { $sql .= ' LIMIT '.$limit; }
 536                 $sql .= ' '. $this->getSelectOptions();
 537
 538                 $res = $dbr->query($sql, $fname);
 539
 540                 while ( $line = $dbr->fetchObject( $res ) ) {
 541                         $contribs[] = array($line->rev_user, $line->rev_user_text, $line->user_real_name);
 542                 }
 543
 544                 $dbr->freeResult($res);
 545                 return $contribs;
 546         }
 547
 548         /**
 549          * This is the default action of the script: just view the page of
 550          * the given title.
 551         */
 552         function view() {
 553                 global $wgUser, $wgOut, $wgRequest, $wgOnlySysopsCanPatrol, $wgLang;
 554                 global $wgLinkCache, $IP, $wgEnableParserCache, $wgStylePath, $wgUseRCPatrol;
 555                 global $wgEnotif;
 556                 $sk = $wgUser->getSkin();
 557
 558                 $fname = 'Article::view';
 559                 wfProfileIn( $fname );
 560                 # Get variables from query string
 561                 $oldid = $this->getOldID();
 562                 $diff = $wgRequest->getVal( 'diff' );
 563                 $rcid = $wgRequest->getVal( 'rcid' );
 564
 565                 $wgOut->setArticleFlag( true );
 566                 $wgOut->setRobotpolicy( 'index,follow' );
 567                 # If we got diff and oldid in the query, we want to see a
 568                 # diff page instead of the article.
 569
 570                 if ( !is_null( $diff ) ) {
 571                         require_once( 'DifferenceEngine.php' );
 572                         $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
 573                         $de = new DifferenceEngine( $oldid, $diff, $rcid );
 574                         $de->showDiffPage();
 575                         if( $diff == 0 ) {
 576                                 # Run view updates for current revision only
 577                                 $this->viewUpdates();
 578                         }
 579                         wfProfileOut( $fname );
 580                         return;
 581                 }
 582                 if ( empty( $oldid ) && $this->checkTouched() ) {
 583                         if( $wgOut->checkLastModified( $this->mTouched ) ){
 584                                 wfProfileOut( $fname );
 585                                 return;
 586                         } else if ( $this->tryFileCache() ) {
 587                                 # tell wgOut that output is taken care of
 588                                 $wgOut->disable();
 589                                 $this->viewUpdates();
 590                                 wfProfileOut( $fname );
 591                                 return;
 592                         }
 593                 }
 594                 # Should the parser cache be used?
 595                 if ( $wgEnableParserCache && intval($wgUser->getOption( 'stubthreshold' )) == 0 && empty( $oldid ) ) {
 596                         $pcache = true;
 597                 } else {
 598                         $pcache = false;
 599                 }
 600
 601                 $outputDone = false;
 602                 if ( $pcache ) {
 603                         if ( $wgOut->tryParserCache( $this, $wgUser ) ) {
 604                                 $outputDone = true;
 605                         }
 606                 }
 607                 if ( !$outputDone ) {
 608                         $text = $this->getContent( false ); # May change mTitle by following a redirect
 609
 610                         # Another whitelist check in case oldid or redirects are altering the title
 611                         if ( !$this->mTitle->userCanRead() ) {
 612                                 $wgOut->loginToUse();
 613                                 $wgOut->output();
 614                                 exit;
 615                         }
 616
 617
 618                         # We're looking at an old revision
 619
 620                         if ( !empty( $oldid ) ) {
 621                                 $this->setOldSubtitle( isset($this->mOldId) ? $this->mOldId : $oldid );
 622                                 $wgOut->setRobotpolicy( 'noindex,follow' );
 623                         }
 624                         if ( '' != $this->mRedirectedFrom ) {
 625                                 $sk = $wgUser->getSkin();
 626                                 $redir = $sk->makeKnownLink( $this->mRedirectedFrom, '',
 627                                   'redirect=no' );
 628                                 $s = wfMsg( 'redirectedfrom', $redir );
 629                                 $wgOut->setSubtitle( $s );
 630
 631                                 # Can't cache redirects
 632                                 $pcache = false;
 633                         }
 634
 635                         # wrap user css and user js in pre and don't parse
 636                         # XXX: use $this->mTitle->usCssJsSubpage() when php is fixed/ a workaround is found
 637                         if (
 638                                 $this->mTitle->getNamespace() == NS_USER &&
 639                                 preg_match('/\\/[\\w]+\\.(css|js)$/', $this->mTitle->getDBkey())
 640                         ) {
 641                                 $wgOut->addWikiText( wfMsg('clearyourcache'));
 642                                 $wgOut->addHTML( '<pre>'.htmlspecialchars($this->mContent)."\n</pre>" );
 643                         } else if ( $rt = Title::newFromRedirect( $text ) ) {
 644                                 # Display redirect
 645                                 $imageUrl = $wgStylePath.'/common/images/redirect.png';
 646                                 $targetUrl = $rt->escapeLocalURL();
 647                                 $titleText = htmlspecialchars( $rt->getPrefixedText() );
 648                                 $link = $sk->makeLinkObj( $rt );
 649
 650                                 $wgOut->addHTML( '<img valign="center" src="'.$imageUrl.'" alt="#REDIRECT" />' .
 651                                   '<span class="redirectText">'.$link.'</span>' );
 652
 653                         } else if ( $pcache ) {
 654                                 # Display content and save to parser cache
 655                                 $wgOut->addPrimaryWikiText( $text, $this );
 656                         } else {
 657                                 # Display content, don't attempt to save to parser cache
 658                                 $wgOut->addWikiText( $text );
 659                         }
 660                 }
 661                 $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
 662                 # If we have been passed an &rcid= parameter, we want to give the user a
 663                 # chance to mark this new article as patrolled.
 664                 if ( $wgUseRCPatrol && !is_null ( $rcid ) && $rcid != 0 && $wgUser->getID() != 0 &&
 665                      ( $wgUser->isAllowed('patrol') || !$wgOnlySysopsCanPatrol ) )
 666                 {
 667                         $wgOut->addHTML( wfMsg ( 'markaspatrolledlink',
 668                                 $sk->makeKnownLinkObj ( $this->mTitle, wfMsg ( 'markaspatrolledtext' ),
 669                                         'action=markpatrolled&rcid='.$rcid )
 670                          ) );
 671                 }
 672
 673                 # Put link titles into the link cache
 674                 $wgOut->transformBuffer();
 675
 676                 # Add link titles as META keywords
 677                 $wgOut->addMetaTags() ;
 678
 679                 $this->viewUpdates();
 680                 wfProfileOut( $fname );
 681
 682                 $wgUser->clearNotification( $this->mTitle );
 683         }
 684
 685         /**
 686          * Theoretically we could defer these whole insert and update
 687          * functions for after display, but that's taking a big leap
 688          * of faith, and we want to be able to report database
 689          * errors at some point.
 690          * @private
 691          */
 692         function insertNewArticle( $text, $summary, $isminor, $watchthis ) {
 693                 global $wgOut, $wgUser;
 694                 global $wgUseSquid, $wgDeferredUpdateList, $wgInternalServer;
 695
 696                 $fname = 'Article::insertNewArticle';
 697
 698                 $this->mCountAdjustment = $this->isCountable( $text );
 699
 700                 $ns = $this->mTitle->getNamespace();
 701                 $ttl = $this->mTitle->getDBkey();
 702                 $text = $this->preSaveTransform( $text );
 703                 if ( $this->isRedirect( $text ) ) { $redir = 1; }
 704                 else { $redir = 0; }
 705
 706                 $now = wfTimestampNow();
 707                 $won = wfInvertTimestamp( $now );
 708                 wfSeedRandom();
 709                 $rand = wfRandom();
 710                 $isminor = ( $isminor && $wgUser->getID() ) ? 1 : 0;
 711
 712                 $mungedText = $text;
 713                 $flags = Revision::compressRevisionText( $mungedText );
 714
 715                 $dbw =& wfGetDB( DB_MASTER );
 716
 717                 $old_id = $dbw->nextSequenceValue( 'text_old_id_seq' );
 718                 $dbw->insert( 'text', array(
 719                         'old_id' => $old_id,
 720                         'old_text' => $mungedText,
 721                         'old_flags' => $flags,
 722                 ), $fname );
 723                 $revisionId = $dbw->insertId();
 724
 725                 $page_id = $dbw->nextSequenceValue( 'page_page_id_seq' );
 726                 $dbw->insert( 'page', array(
 727                         'page_id' => $page_id,
 728                         'page_namespace' => $ns,
 729                         'page_title' => $ttl,
 730                         'page_counter' => 0,
 731                         'page_restrictions' => '',
 732                         'page_is_redirect' => $redir,
 733                         'page_is_new' => 1,
 734                         'page_random' => $rand,
 735                         'page_touched' => $dbw->timestamp($now),
 736                         'page_latest' => $revisionId,
 737                 ), $fname );
 738                 $newid = $dbw->insertId();
 739
 740                 $dbw->insert( 'revision', array(
 741                         'rev_page' => $newid,
 742                         'rev_id' => $revisionId,
 743                         'rev_comment' => $summary,
 744                         'rev_user' => $wgUser->getID(),
 745                         'rev_timestamp' => $dbw->timestamp($now),
 746                         'rev_minor_edit' => $isminor,
 747                         'rev_user_text' => $wgUser->getName(),
 748                         'inverse_timestamp' => $won,
 749                 ), $fname );
 750
 751                 $this->mTitle->resetArticleID( $newid );
 752
 753                 Article::onArticleCreate( $this->mTitle );
 754                 RecentChange::notifyNew( $now, $this->mTitle, $isminor, $wgUser, $summary );
 755
 756                 if ($watchthis) {
 757                         if(!$this->mTitle->userIsWatching()) $this->watch();
 758                 } else {
 759                         if ( $this->mTitle->userIsWatching() ) {
 760                                 $this->unwatch();
 761                         }
 762                 }
 763
 764                 # The talk page isn't in the regular link tables, so we need to update manually:
 765                 $talkns = $ns ^ 1; # talk -> normal; normal -> talk
 766                 $dbw->update( 'page',
 767                         array( 'page_touched' => $dbw->timestamp($now) ),
 768                         array( 'page_namespace' => $talkns,
 769                                'page_title' => $ttl ),
 770                         $fname );
 771
 772                 # standard deferred updates
 773                 $this->editUpdates( $text, $summary, $isminor, $now );
 774
 775                 $oldid = 0; # new article
 776                 $this->showArticle( $text, wfMsg( 'newarticle' ), false, $isminor, $now, $summary, $oldid );
 777         }
 778
 779         /**
 780          * Fetch and uncompress the text for a given revision.
 781          * Can ask by rev_id number or timestamp (set $field)
 782          */
 783         function fetchRevisionText( $revId = null, $field = 'rev_id' ) {
 784                 $fname = 'Article::fetchRevisionText';
 785                 $dbw =& wfGetDB( DB_MASTER );
 786                 if( $revId ) {
 787                         $rev = $dbw->addQuotes( $revId );
 788                 } else {
 789                         $rev = 'page_latest';
 790                 }
 791                 $result = $dbw->query(
 792                         sprintf( "SELECT old_text, old_flags
 793                                 FROM %s,%s,%s
 794                                 WHERE old_id=rev_id AND rev_page=page_id AND page_id=%d
 795                                 AND %s=%s",
 796                                 $dbw->tableName( 'page' ),
 797                                 $dbw->tableName( 'revision' ),
 798                                 $dbw->tableName( 'text' ),
 799                                 IntVal( $this->mTitle->getArticleId() ),
 800                                 $field,
 801                                 $rev ),
 802                         $fname );
 803                 $obj = $dbw->fetchObject( $result );
 804                 $dbw->freeResult( $result );
 805                 $oldtext = Revision::getRevisionText( $obj );
 806                 return $oldtext;
 807         }
 808
 809         function getTextOfLastEditWithSectionReplacedOrAdded($section, $text, $summary = '', $edittime = NULL) {
 810                 $fname = 'Article::getTextOfLastEditWithSectionReplacedOrAdded';
 811                 if( is_null( $edittime ) ) {
 812                         $oldtext = $this->fetchRevisionText();
 813                 } else {
 814                         $oldtext = $this->fetchRevisionText( $edittime, 'rev_timestamp' );
 815                 }
 816                 if ($section != '') {
 817                         if($section=='new') {
 818                                 if($summary) $subject="== {$summary} ==\n\n";
 819                                 $text=$oldtext."\n\n".$subject.$text;
 820                         } else {
 821
 822                                 # strip NOWIKI etc. to avoid confusion (true-parameter causes HTML
 823                                 # comments to be stripped as well)
 824                                 $striparray=array();
 825                                 $parser=new Parser();
 826                                 $parser->mOutputType=OT_WIKI;
 827                                 $oldtext=$parser->strip($oldtext, $striparray, true);
 828
 829                                 # now that we can be sure that no pseudo-sections are in the source,
 830                                 # split it up
 831                                 # Unfortunately we can't simply do a preg_replace because that might
 832                                 # replace the wrong section, so we have to use the section counter instead
 833                                 $secs=preg_split('/(^=+.+?=+|^<h[1-6].*?' . '>.*?<\/h[1-6].*?' . '>)(?!\S)/mi',
 834                                   $oldtext,-1,PREG_SPLIT_DELIM_CAPTURE);
 835                                 $secs[$section*2]=$text."\n\n"; // replace with edited
 836
 837                                 # section 0 is top (intro) section
 838                                 if($section!=0) {
 839
 840                                         # headline of old section - we need to go through this section
 841                                         # to determine if there are any subsections that now need to
 842                                         # be erased, as the mother section has been replaced with
 843                                         # the text of all subsections.
 844                                         $headline=$secs[$section*2-1];
 845                                         preg_match( '/^(=+).+?=+|^<h([1-6]).*?' . '>.*?<\/h[1-6].*?' . '>(?!\S)/mi',$headline,$matches);
 846                                         $hlevel=$matches[1];
 847
 848                                         # determine headline level for wikimarkup headings
 849                                         if(strpos($hlevel,'=')!==false) {
 850                                                 $hlevel=strlen($hlevel);
 851                                         }
 852
 853                                         $secs[$section*2-1]=''; // erase old headline
 854                                         $count=$section+1;
 855                                         $break=false;
 856                                         while(!empty($secs[$count*2-1]) && !$break) {
 857
 858                                                 $subheadline=$secs[$count*2-1];
 859                                                 preg_match(
 860                                                  '/^(=+).+?=+|^<h([1-6]).*?' . '>.*?<\/h[1-6].*?' . '>(?!\S)/mi',$subheadline,$matches);
 861                                                 $subhlevel=$matches[1];
 862                                                 if(strpos($subhlevel,'=')!==false) {
 863                                                         $subhlevel=strlen($subhlevel);
 864                                                 }
 865                                                 if($subhlevel > $hlevel) {
 866                                                         // erase old subsections
 867                                                         $secs[$count*2-1]='';
 868                                                         $secs[$count*2]='';
 869                                                 }
 870                                                 if($subhlevel <= $hlevel) {
 871                                                         $break=true;
 872                                                 }
 873                                                 $count++;
 874
 875                                         }
 876
 877                                 }
 878                                 $text=join('',$secs);
 879                                 # reinsert the stuff that we stripped out earlier
 880                                 $text=$parser->unstrip($text,$striparray);
 881                                 $text=$parser->unstripNoWiki($text,$striparray);
 882                         }
 883
 884                 }
 885                 return $text;
 886         }
 887
 888         /**
 889          * Change an existing article. Puts the previous version back into the old table, updates RC
 890          * and all necessary caches, mostly via the deferred update array.
 891          *
 892          * It is possible to call this function from a command-line script, but note that you should
 893          * first set $wgUser, and clean up $wgDeferredUpdates after each edit.
 894          */
 895         function updateArticle( $text, $summary, $minor, $watchthis, $forceBot = false, $sectionanchor = '' ) {
 896                 global $wgOut, $wgUser;
 897                 global $wgDBtransactions, $wgMwRedir;
 898                 global $wgUseSquid, $wgInternalServer;
 899
 900                 $fname = 'Article::updateArticle';
 901                 $good = true;
 902
 903                 if ( $this->mMinorEdit ) { $me1 = 1; } else { $me1 = 0; }
 904                 if ( $minor && $wgUser->getID() ) { $me2 = 1; } else { $me2 = 0; }
 905                 if ( $this->isRedirect( $text ) ) {
 906                         # Remove all content but redirect
 907                         # This could be done by reconstructing the redirect from a title given by
 908                         # Title::newFromRedirect(), but then we wouldn't know which synonym the user
 909                         # wants to see
 910                         if ( preg_match( "/^((" . $wgMwRedir->getBaseRegex() . ')[^\\n]+)/i', $text, $m ) ) {
 911                                 $redir = 1;
 912                                 $text = $m[1] . "\n";
 913                         }
 914                 }
 915                 else { $redir = 0; }
 916
 917                 $text = $this->preSaveTransform( $text );
 918                 $dbw =& wfGetDB( DB_MASTER );
 919
 920                 # Update article, but only if changed.
 921
 922                 # It's important that we either rollback or complete, otherwise an attacker could
 923                 # overwrite cur entries by sending precisely timed user aborts. Random bored users
 924                 # could conceivably have the same effect, especially if cur is locked for long periods.
 925                 if( $wgDBtransactions ) {
 926                         $dbw->query( 'BEGIN', $fname );
 927                 } else {
 928                         $userAbort = ignore_user_abort( true );
 929                 }
 930
 931                 $oldtext = $this->getContent( true );
 932
 933                 if ( 0 != strcmp( $text, $oldtext ) ) {
 934                         $this->mCountAdjustment = $this->isCountable( $text )
 935                           - $this->isCountable( $oldtext );
 936                         $now = wfTimestampNow();
 937                         $won = wfInvertTimestamp( $now );
 938
 939                         $mungedText = $text;
 940                         $flags = Revision::compressRevisionText( $newtext );
 941
 942                         $lastRevision = $dbw->selectField(
 943                                 'page', 'page_latest', array( 'page_id' => $this->getId() ) );
 944
 945                         # Record the text to the text table
 946                         $old_id = $dbw->nextSequenceValue( 'text_old_id_val' );
 947                         $dbw->insert( 'text',
 948                                 array(
 949                                         'old_id' => $old_id,
 950                                         'old_text' => $mungedText,
 951                                         'old_flags' => $flags,
 952                                 ), $fname
 953                         );
 954                         $revisionId = $dbw->insertId();
 955
 956                         # Record the edit in revisions
 957                         $dbw->insert( 'revision',
 958                                 array(
 959                                         'rev_id' => $revisionId,
 960                                         'rev_page' => $this->getID(),
 961                                         'rev_comment' => $summary,
 962                                         'rev_minor_edit' => $me2,
 963                                         'rev_user' => $wgUser->getID(),
 964                                         'rev_user_text' => $wgUser->getName(),
 965                                         'rev_timestamp' => $dbw->timestamp( $now ),
 966                                         'inverse_timestamp' => $won
 967                                 ), $fname
 968                         );
 969
 970                         # Update page
 971                         $dbw->update( 'page',
 972                                 array( /* SET */
 973                                         'page_latest' => $revisionId,
 974                                         'page_touched' => $dbw->timestamp( $now ),
 975                                         'page_is_new' => 0,
 976                                         'page_is_redirect' => $redir,
 977                                 ), array( /* WHERE */
 978                                         'page_id' => $this->getID(),
 979                                         'page_latest' => $lastRevision, # Paranoia
 980                                 ), $fname
 981                         );
 982
 983                         if( $dbw->affectedRows() == 0 ) {
 984                                 /* Belated edit conflict! Run away!! */
 985                                 $good = false;
 986                         } else {
 987                                 # Update recentchanges and purge cache and whatnot
 988                                 $bot = (int)($wgUser->isBot() || $forceBot);
 989                                 RecentChange::notifyEdit( $now, $this->mTitle, $me2, $wgUser, $summary,
 990                                         $lastRevision, $this->getTimestamp(), $bot );
 991                                 Article::onArticleEdit( $this->mTitle );
 992                         }
 993                 }
 994
 995                 if( $wgDBtransactions ) {
 996                         $dbw->query( 'COMMIT', $fname );
 997                 } else {
 998                         ignore_user_abort( $userAbort );
 999                 }
1000
1001                 if ( $good ) {
1002                 if ($watchthis) {
1003                         if (!$this->mTitle->userIsWatching()) $this->watch();
1004                 } else {
1005                         if ( $this->mTitle->userIsWatching() ) {
1006                                 $this->unwatch();
1007                         }
1008                 }
1009                 # standard deferred updates
1010                 $this->editUpdates( $text, $summary, $minor, $now );
1011
1012
1013                 $urls = array();
1014                 # Template namespace
1015                 # Purge all articles linking here
1016                 if ( $this->mTitle->getNamespace() == NS_TEMPLATE) {
1017                         $titles = $this->mTitle->getLinksTo();
1018                         Title::touchArray( $titles );
1019                         if ( $wgUseSquid ) {
1020                                         foreach ( $titles as $title ) {
1021                                                 $urls[] = $title->getInternalURL();
1022                                         }
1023                         }
1024                 }
1025
1026                 # Squid updates
1027                 if ( $wgUseSquid ) {
1028                         $urls = array_merge( $urls, $this->mTitle->getSquidURLs() );
1029                         $u = new SquidUpdate( $urls );
1030                         $u->doUpdate();
1031                 }
1032
1033                 $this->showArticle( $text, wfMsg( 'updated' ), $sectionanchor, $me2, $now, $summary, $revisionId );
1034                 }
1035                 return $good;
1036         }
1037
1038         /**
1039          * After we've either updated or inserted the article, update
1040          * the link tables and redirect to the new page.
1041          */
1042         function showArticle( $text, $subtitle , $sectionanchor = '', $me2, $now, $summary, $oldid ) {
1043                 global $wgOut, $wgUser, $wgLinkCache, $wgEnotif;
1044
1045                 $wgLinkCache = new LinkCache();
1046                 # Select for update
1047                 $wgLinkCache->forUpdate( true );
1048
1049                 # Get old version of link table to allow incremental link updates
1050                 $wgLinkCache->preFill( $this->mTitle );
1051                 $wgLinkCache->clear();
1052
1053                 # Parse the text and replace links with placeholders
1054                 $wgOut = new OutputPage();
1055                 $wgOut->addWikiText( $text );
1056
1057                 # Look up the links in the DB and add them to the link cache
1058                 $wgOut->transformBuffer( RLH_FOR_UPDATE );
1059
1060                 if( $this->isRedirect( $text ) )
1061                         $r = 'redirect=no';
1062                 else
1063                         $r = '';
1064                 $wgOut->redirect( $this->mTitle->getFullURL( $r ).$sectionanchor );
1065
1066                 # this call would better fit into RecentChange::notifyEdit and RecentChange::notifyNew .
1067                 # this will be improved later (to-do)
1068
1069                 include_once( "UserMailer.php" );
1070                 $wgEnotif = new EmailNotification ();
1071                 $wgEnotif->NotifyOnPageChange( $wgUser->getID(), $this->mTitle->getDBkey(), $this->mTitle->getNamespace(),$now, $summary, $me2, $oldid );
1072         }
1073
1074         /**
1075          * Validate article
1076          * @todo document this function a bit more
1077          */
1078         function validate () {
1079                 global $wgOut, $wgUseValidation;
1080                 if( $wgUseValidation ) {
1081                         require_once ( 'SpecialValidate.php' ) ;
1082                         $wgOut->setPagetitle( wfMsg( 'validate' ) . ': ' . $this->mTitle->getPrefixedText() );
1083                         $wgOut->setRobotpolicy( 'noindex,follow' );
1084                         if( $this->mTitle->getNamespace() != 0 ) {
1085                                 $wgOut->addHTML( wfMsg( 'val_validate_article_namespace_only' ) );
1086                                 return;
1087                         }
1088                         $v = new Validation;
1089                         $v->validate_form( $this->mTitle->getDBkey() );
1090                 } else {
1091                         $wgOut->errorpage( 'nosuchaction', 'nosuchactiontext' );
1092                 }
1093         }
1094
1095         /**
1096          * Mark this particular edit as patrolled
1097          */
1098         function markpatrolled() {
1099                 global $wgOut, $wgRequest, $wgOnlySysopsCanPatrol, $wgUseRCPatrol, $wgUser;
1100                 $wgOut->setRobotpolicy( 'noindex,follow' );
1101
1102                 if ( !$wgUseRCPatrol )
1103                 {
1104                         $wgOut->errorpage( 'rcpatroldisabled', 'rcpatroldisabledtext' );
1105                         return;
1106                 }
1107                 if ( $wgUser->getID() == 0 )
1108                 {
1109                         $wgOut->loginToUse();
1110                         return;
1111                 }
1112                 if ( $wgOnlySysopsCanPatrol && !$wgUser->isAllowed('patrol') )
1113                 {
1114                         $wgOut->sysopRequired();
1115                         return;
1116                 }
1117                 $rcid = $wgRequest->getVal( 'rcid' );
1118                 if ( !is_null ( $rcid ) )
1119                 {
1120                         RecentChange::markPatrolled( $rcid );
1121                         $wgOut->setPagetitle( wfMsg( 'markedaspatrolled' ) );
1122                         $wgOut->addWikiText( wfMsg( 'markedaspatrolledtext' ) );
1123
1124                         $rcTitle = Title::makeTitle( NS_SPECIAL, 'Recentchanges' );
1125                         $wgOut->returnToMain( false, $rcTitle->getPrefixedText() );
1126                 }
1127                 else
1128                 {
1129                         $wgOut->errorpage( 'markedaspatrollederror', 'markedaspatrollederrortext' );
1130                 }
1131         }
1132
1133
1134         /**
1135          * Add this page to $wgUser's watchlist
1136          */
1137
1138         function watch() {
1139
1140                 global $wgUser, $wgOut;
1141
1142                 if ( 0 == $wgUser->getID() ) {
1143                         $wgOut->errorpage( 'watchnologin', 'watchnologintext' );
1144                         return;
1145                 }
1146                 if ( wfReadOnly() ) {
1147                         $wgOut->readOnlyPage();
1148                         return;
1149                 }
1150
1151                 if (wfRunHooks('WatchArticle', $wgUser, $this)) {
1152
1153                         $wgUser->addWatch( $this->mTitle );
1154                         $wgUser->saveSettings();
1155
1156                         wfRunHooks('WatchArticleComplete', $wgUser, $this);
1157
1158                         $wgOut->setPagetitle( wfMsg( 'addedwatch' ) );
1159                         $wgOut->setRobotpolicy( 'noindex,follow' );
1160
1161                         $link = $this->mTitle->getPrefixedText();
1162                         $text = wfMsg( 'addedwatchtext', $link );
1163                         $wgOut->addWikiText( $text );
1164                 }
1165
1166                 $wgOut->returnToMain( true, $this->mTitle->getPrefixedText() );
1167         }
1168
1169         /**
1170          * Stop watching a page
1171          */
1172
1173         function unwatch() {
1174
1175                 global $wgUser, $wgOut;
1176
1177                 if ( 0 == $wgUser->getID() ) {
1178                         $wgOut->errorpage( 'watchnologin', 'watchnologintext' );
1179                         return;
1180                 }
1181                 if ( wfReadOnly() ) {
1182                         $wgOut->readOnlyPage();
1183                         return;
1184                 }
1185
1186                 if (wfRunHooks('UnwatchArticle', $wgUser, $this)) {
1187
1188                         $wgUser->removeWatch( $this->mTitle );
1189                         $wgUser->saveSettings();
1190
1191                         wfRunHooks('UnwatchArticleComplete', $wgUser, $this);
1192
1193                         $wgOut->setPagetitle( wfMsg( 'removedwatch' ) );
1194                         $wgOut->setRobotpolicy( 'noindex,follow' );
1195
1196                         $link = $this->mTitle->getPrefixedText();
1197                         $text = wfMsg( 'removedwatchtext', $link );
1198                         $wgOut->addWikiText( $text );
1199                 }
1200
1201                 $wgOut->returnToMain( true, $this->mTitle->getPrefixedText() );
1202         }
1203
1204         /**
1205          * protect a page
1206          */
1207         function protect( $limit = 'sysop' ) {
1208                 global $wgUser, $wgOut, $wgRequest;
1209
1210                 if ( ! $wgUser->isAllowed('protect') ) {
1211                         $wgOut->sysopRequired();
1212                         return;
1213                 }
1214                 if ( wfReadOnly() ) {
1215                         $wgOut->readOnlyPage();
1216                         return;
1217                 }
1218                 $id = $this->mTitle->getArticleID();
1219                 if ( 0 == $id ) {
1220                         $wgOut->fatalError( wfMsg( 'badarticleerror' ) );
1221                         return;
1222                 }
1223
1224                 $confirm = $wgRequest->getBool( 'wpConfirmProtect' ) && $wgRequest->wasPosted();
1225                 $moveonly = $wgRequest->getBool( 'wpMoveOnly' );
1226                 $reason = $wgRequest->getText( 'wpReasonProtect' );
1227
1228                 if ( $confirm ) {
1229                         $dbw =& wfGetDB( DB_MASTER );
1230                         $dbw->update( 'page',
1231                                 array( /* SET */
1232                                         'page_touched' => $dbw->timestamp(),
1233                                         'page_restrictions' => (string)$limit
1234                                 ), array( /* WHERE */
1235                                         'page_id' => $id
1236                                 ), 'Article::protect'
1237                         );
1238
1239                         $restrictions = "move=" . $limit;
1240                         if( !$moveonly ) {
1241                                 $restrictions .= ":edit=" . $limit;
1242                         }
1243                         if (wfRunHooks('ArticleProtect', $this, $wgUser, $limit == 'sysop', $reason, $moveonly)) {
1244
1245                                 $dbw =& wfGetDB( DB_MASTER );
1246                                 $dbw->update( 'page',
1247                                                           array( /* SET */
1248                                                                          'page_touched' => $dbw->timestamp(),
1249                                                                          'page_restrictions' => $restrictions
1250                                                                          ), array( /* WHERE */
1251                                                                                            'page_id' => $id
1252                                                                                            ), 'Article::protect'
1253                                                           );
1254
1255                                 wfRunHooks('ArticleProtectComplete', $this, $wgUser, $limit == 'sysop', $reason, $moveonly);
1256
1257                                 $log = new LogPage( 'protect' );
1258                                 if ( $limit === '' ) {
1259                                         $log->addEntry( 'unprotect', $this->mTitle, $reason );
1260                                 } else {
1261                                         $log->addEntry( 'protect', $this->mTitle, $reason );
1262                                 }
1263                                 $wgOut->redirect( $this->mTitle->getFullURL() );
1264                         }
1265                         return;
1266                 } else {
1267                         $reason = htmlspecialchars( wfMsg( 'protectreason' ) );
1268                         return $this->confirmProtect( '', $reason, $limit );
1269                 }
1270         }
1271
1272         /**
1273          * Output protection confirmation dialog
1274          */
1275         function confirmProtect( $par, $reason, $limit = 'sysop'  ) {
1276                 global $wgOut;
1277
1278                 wfDebug( "Article::confirmProtect\n" );
1279
1280                 $sub = htmlspecialchars( $this->mTitle->getPrefixedText() );
1281                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
1282
1283                 $check = '';
1284                 $protcom = '';
1285                 $moveonly = '';
1286
1287                 if ( $limit === '' ) {
1288                         $wgOut->setPageTitle( wfMsg( 'confirmunprotect' ) );
1289                         $wgOut->setSubtitle( wfMsg( 'unprotectsub', $sub ) );
1290                         $wgOut->addWikiText( wfMsg( 'confirmunprotecttext' ) );
1291                         $check = htmlspecialchars( wfMsg( 'confirmunprotect' ) );
1292                         $protcom = htmlspecialchars( wfMsg( 'unprotectcomment' ) );
1293                         $formaction = $this->mTitle->escapeLocalURL( 'action=unprotect' . $par );
1294                 } else {
1295                         $wgOut->setPageTitle( wfMsg( 'confirmprotect' ) );
1296                         $wgOut->setSubtitle( wfMsg( 'protectsub', $sub ) );
1297                         $wgOut->addWikiText( wfMsg( 'confirmprotecttext' ) );
1298                         $check = htmlspecialchars( wfMsg( 'confirmprotect' ) );
1299                         $moveonly = htmlspecialchars( wfMsg( 'protectmoveonly' ) );
1300                         $protcom = htmlspecialchars( wfMsg( 'protectcomment' ) );
1301                         $formaction = $this->mTitle->escapeLocalURL( 'action=protect' . $par );
1302                 }
1303
1304                 $confirm = htmlspecialchars( wfMsg( 'confirm' ) );
1305
1306                 $wgOut->addHTML( "
1307 <form id='protectconfirm' method='post' action=\"{$formaction}\">
1308         <table border='0'>
1309                 <tr>
1310                         <td align='right'>
1311                                 <label for='wpReasonProtect'>{$protcom}:</label>
1312                         </td>
1313                         <td align='left'>
1314                                 <input type='text' size='60' name='wpReasonProtect' id='wpReasonProtect' value=\"" . htmlspecialchars( $reason ) . "\" />
1315                         </td>
1316                 </tr>
1317                 <tr>
1318                         <td>&nbsp;</td>
1319                 </tr>
1320                 <tr>
1321                         <td align='right'>
1322                                 <input type='checkbox' name='wpConfirmProtect' value='1' id='wpConfirmProtect' />
1323                         </td>
1324                         <td>
1325                                 <label for='wpConfirmProtect'>{$check}</label>
1326                         </td>
1327                 </tr> " );
1328                 if($moveonly != '') {
1329                         $wgOut->AddHTML( "
1330                 <tr>
1331                         <td align='right'>
1332                                 <input type='checkbox' name='wpMoveOnly' value='1' id='wpMoveOnly' />
1333                         </td>
1334                         <td>
1335                                 <label for='wpMoveOnly'>{$moveonly}</label>
1336                         </td>
1337                 </tr> " );
1338                 }
1339                 $wgOut->addHTML( "
1340                 <tr>
1341                         <td>&nbsp;</td>
1342                         <td>
1343                                 <input type='submit' name='wpConfirmProtectB' value=\"{$confirm}\" />
1344                         </td>
1345                 </tr>
1346         </table>
1347 </form>\n" );
1348
1349                 $wgOut->returnToMain( false );
1350         }
1351
1352         /**
1353          * Unprotect the pages
1354          */
1355         function unprotect() {
1356                 return $this->protect( '' );
1357         }
1358
1359         /*
1360          * UI entry point for page deletion
1361          */
1362         function delete() {
1363                 global $wgUser, $wgOut, $wgMessageCache, $wgRequest;
1364                 $fname = 'Article::delete';
1365                 $confirm = $wgRequest->getBool( 'wpConfirm' ) && $wgRequest->wasPosted();
1366                 $reason = $wgRequest->getText( 'wpReason' );
1367
1368                 # This code desperately needs to be totally rewritten
1369
1370                 # Check permissions
1371                 if ( ( ! $wgUser->isAllowed('delete') ) ) {
1372                         $wgOut->sysopRequired();
1373                         return;
1374                 }
1375                 if ( wfReadOnly() ) {
1376                         $wgOut->readOnlyPage();
1377                         return;
1378                 }
1379
1380                 # Better double-check that it hasn't been deleted yet!
1381                 $wgOut->setPagetitle( wfMsg( 'confirmdelete' ) );
1382                 if ( ( '' == trim( $this->mTitle->getText() ) )
1383                   or ( $this->mTitle->getArticleId() == 0 ) ) {
1384                         $wgOut->fatalError( wfMsg( 'cannotdelete' ) );
1385                         return;
1386                 }
1387
1388                 if ( $confirm ) {
1389                         $this->doDelete( $reason );
1390                         return;
1391                 }
1392
1393                 # determine whether this page has earlier revisions
1394                 # and insert a warning if it does
1395                 # we select the text because it might be useful below
1396                 $dbr =& $this->getDB();
1397                 $ns = $this->mTitle->getNamespace();
1398                 $title = $this->mTitle->getDBkey();
1399                 $old = $dbr->selectRow( 'old',
1400                         array( 'old_text', 'old_flags' ),
1401                         array(
1402                                 'old_namespace' => $ns,
1403                                 'old_title' => $title,
1404                         ), $fname, $this->getSelectOptions( array( 'ORDER BY' => 'inverse_timestamp' ) )
1405                 );
1406
1407                 if( $old !== false && !$confirm ) {
1408                         $skin=$wgUser->getSkin();
1409                         $wgOut->addHTML('<b>'.wfMsg('historywarning'));
1410                         $wgOut->addHTML( $skin->historyLink() .'</b>');
1411                 }
1412
1413                 # Fetch cur_text
1414                 $s = $dbr->selectRow( 'cur',
1415                         array( 'cur_text' ),
1416                         array(
1417                                 'cur_namespace' => $ns,
1418                                 'cur_title' => $title,
1419                         ), $fname, $this->getSelectOptions()
1420                 );
1421
1422                 if( $s !== false ) {
1423                         # if this is a mini-text, we can paste part of it into the deletion reason
1424
1425                         #if this is empty, an earlier revision may contain "useful" text
1426                         $blanked = false;
1427                         if($s->cur_text != '') {
1428                                 $text=$s->cur_text;
1429                         } else {
1430                                 if($old) {
1431                                         $text = Revision::getRevisionText( $old );
1432                                         $blanked = true;
1433                                 }
1434
1435                         }
1436
1437                         $length=strlen($text);
1438
1439                         # this should not happen, since it is not possible to store an empty, new
1440                         # page. Let's insert a standard text in case it does, though
1441                         if($length == 0 && $reason === '') {
1442                                 $reason = wfMsg('exblank');
1443                         }
1444
1445                         if($length < 500 && $reason === '') {
1446
1447                                 # comment field=255, let's grep the first 150 to have some user
1448                                 # space left
1449                                 $text=substr($text,0,150);
1450                                 # let's strip out newlines and HTML tags
1451                                 $text=preg_replace('/\"/',"'",$text);
1452                                 $text=preg_replace('/\</','&lt;',$text);
1453                                 $text=preg_replace('/\>/','&gt;',$text);
1454                                 $text=preg_replace("/[\n\r]/",'',$text);
1455                                 if(!$blanked) {
1456                                         $reason=wfMsg('excontent'). " '".$text;
1457                                 } else {
1458                                         $reason=wfMsg('exbeforeblank') . " '".$text;
1459                                 }
1460                                 if($length>150) { $reason .= '...'; } # we've only pasted part of the text
1461                                 $reason.="'";
1462                         }
1463                 }
1464
1465                 return $this->confirmDelete( '', $reason );
1466         }
1467
1468         /**
1469          * Output deletion confirmation dialog
1470          */
1471         function confirmDelete( $par, $reason ) {
1472                 global $wgOut;
1473
1474                 wfDebug( "Article::confirmDelete\n" );
1475
1476                 $sub = htmlspecialchars( $this->mTitle->getPrefixedText() );
1477                 $wgOut->setSubtitle( wfMsg( 'deletesub', $sub ) );
1478                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
1479                 $wgOut->addWikiText( wfMsg( 'confirmdeletetext' ) );
1480
1481                 $formaction = $this->mTitle->escapeLocalURL( 'action=delete' . $par );
1482
1483                 $confirm = htmlspecialchars( wfMsg( 'confirm' ) );
1484                 $check = htmlspecialchars( wfMsg( 'confirmcheck' ) );
1485                 $delcom = htmlspecialchars( wfMsg( 'deletecomment' ) );
1486
1487                 $wgOut->addHTML( "
1488 <form id='deleteconfirm' method='post' action=\"{$formaction}\">
1489         <table border='0'>
1490                 <tr>
1491                         <td align='right'>
1492                                 <label for='wpReason'>{$delcom}:</label>
1493                         </td>
1494                         <td align='left'>
1495                                 <input type='text' size='60' name='wpReason' id='wpReason' value=\"" . htmlspecialchars( $reason ) . "\" />
1496                         </td>
1497                 </tr>
1498                 <tr>
1499                         <td>&nbsp;</td>
1500                 </tr>
1501                 <tr>
1502                         <td align='right'>
1503                                 <input type='checkbox' name='wpConfirm' value='1' id='wpConfirm' />
1504                         </td>
1505                         <td>
1506                                 <label for='wpConfirm'>{$check}</label>
1507                         </td>
1508                 </tr>
1509                 <tr>
1510                         <td>&nbsp;</td>
1511                         <td>
1512                                 <input type='submit' name='wpConfirmB' value=\"{$confirm}\" />
1513                         </td>
1514                 </tr>
1515         </table>
1516 </form>\n" );
1517
1518                 $wgOut->returnToMain( false );
1519         }
1520
1521
1522         /**
1523          * Perform a deletion and output success or failure messages
1524          */
1525         function doDelete( $reason ) {
1526                 global $wgOut, $wgUser, $wgContLang;
1527                 $fname = 'Article::doDelete';
1528                 wfDebug( $fname."\n" );
1529
1530                 if (wfRunHooks('ArticleDelete', $this, $wgUser, $reason)) {
1531                         if ( $this->doDeleteArticle( $reason ) ) {
1532                                 $deleted = $this->mTitle->getPrefixedText();
1533
1534                                 $wgOut->setPagetitle( wfMsg( 'actioncomplete' ) );
1535                                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
1536
1537                                 $sk = $wgUser->getSkin();
1538                                 $loglink = $sk->makeKnownLink( $wgContLang->getNsText( NS_PROJECT ) .
1539                                                                                            ':' . wfMsgForContent( 'dellogpage' ),
1540                                                                                            wfMsg( 'deletionlog' ) );
1541
1542                                 $text = wfMsg( 'deletedtext', $deleted, $loglink );
1543
1544                                 $wgOut->addHTML( '<p>' . $text . "</p>\n" );
1545                                 $wgOut->returnToMain( false );
1546                                 wfRunHooks('ArticleDeleteComplete', $this, $wgUser, $reason);
1547                         } else {
1548                                 $wgOut->fatalError( wfMsg( 'cannotdelete' ) );
1549                         }
1550                 }
1551         }
1552
1553         /**
1554          * Back-end article deletion
1555          * Deletes the article with database consistency, writes logs, purges caches
1556          * Returns success
1557          */
1558         function doDeleteArticle( $reason ) {
1559                 global $wgUser;
1560                 global  $wgUseSquid, $wgDeferredUpdateList, $wgInternalServer;
1561
1562                 $fname = 'Article::doDeleteArticle';
1563                 wfDebug( $fname."\n" );
1564
1565                 $dbw =& wfGetDB( DB_MASTER );
1566                 $ns = $this->mTitle->getNamespace();
1567                 $t = $this->mTitle->getDBkey();
1568                 $id = $this->mTitle->getArticleID();
1569
1570                 if ( $t == '' || $id == 0 ) {
1571                         return false;
1572                 }
1573
1574                 $u = new SiteStatsUpdate( 0, 1, -$this->isCountable( $this->getContent( true ) ) );
1575                 array_push( $wgDeferredUpdateList, $u );
1576
1577                 $linksTo = $this->mTitle->getLinksTo();
1578
1579                 # Squid purging
1580                 if ( $wgUseSquid ) {
1581                         $urls = array(
1582                                 $this->mTitle->getInternalURL(),
1583                                 $this->mTitle->getInternalURL( 'history' )
1584                         );
1585                         foreach ( $linksTo as $linkTo ) {
1586                                 $urls[] = $linkTo->getInternalURL();
1587                         }
1588
1589                         $u = new SquidUpdate( $urls );
1590                         array_push( $wgDeferredUpdateList, $u );
1591
1592                 }
1593
1594                 # Client and file cache invalidation
1595                 Title::touchArray( $linksTo );
1596
1597                 # Move article and history to the "archive" table
1598                 $archiveTable = $dbw->tableName( 'archive' );
1599                 $oldTable = $dbw->tableName( 'old' );
1600                 $curTable = $dbw->tableName( 'cur' );
1601                 $recentchangesTable = $dbw->tableName( 'recentchanges' );
1602                 $linksTable = $dbw->tableName( 'links' );
1603                 $brokenlinksTable = $dbw->tableName( 'brokenlinks' );
1604
1605                 $dbw->insertSelect( 'archive', 'cur',
1606                         array(
1607                                 'ar_namespace' => 'cur_namespace',
1608                                 'ar_title' => 'cur_title',
1609                                 'ar_text' => 'cur_text',
1610                                 'ar_comment' => 'cur_comment',
1611                                 'ar_user' => 'cur_user',
1612                                 'ar_user_text' => 'cur_user_text',
1613                                 'ar_timestamp' => 'cur_timestamp',
1614                                 'ar_minor_edit' => 'cur_minor_edit',
1615                                 'ar_flags' => 0,
1616                         ), array(
1617                                 'cur_namespace' => $ns,
1618                                 'cur_title' => $t,
1619                         ), $fname
1620                 );
1621
1622                 $dbw->insertSelect( 'archive', 'old',
1623                         array(
1624                                 'ar_namespace' => 'old_namespace',
1625                                 'ar_title' => 'old_title',
1626                                 'ar_text' => 'old_text',
1627                                 'ar_comment' => 'old_comment',
1628                                 'ar_user' => 'old_user',
1629                                 'ar_user_text' => 'old_user_text',
1630                                 'ar_timestamp' => 'old_timestamp',
1631                                 'ar_minor_edit' => 'old_minor_edit',
1632                                 'ar_flags' => 'old_flags'
1633                         ), array(
1634                                 'old_namespace' => $ns,
1635                                 'old_title' => $t,
1636                         ), $fname
1637                 );
1638
1639                 # Now that it's safely backed up, delete it
1640
1641                 $dbw->delete( 'cur', array( 'cur_namespace' => $ns, 'cur_title' => $t ), $fname );
1642                 $dbw->delete( 'old', array( 'old_namespace' => $ns, 'old_title' => $t ), $fname );
1643                 $dbw->delete( 'recentchanges', array( 'rc_namespace' => $ns, 'rc_title' => $t ), $fname );
1644
1645                 # Finally, clean up the link tables
1646                 $t = $this->mTitle->getPrefixedDBkey();
1647
1648                 Article::onArticleDelete( $this->mTitle );
1649
1650                 # Insert broken links
1651                 $brokenLinks = array();
1652                 foreach ( $linksTo as $titleObj ) {
1653                         # Get article ID. Efficient because it was loaded into the cache by getLinksTo().
1654                         $linkID = $titleObj->getArticleID();
1655                         $brokenLinks[] = array( 'bl_from' => $linkID, 'bl_to' => $t );
1656                 }
1657                 $dbw->insert( 'brokenlinks', $brokenLinks, $fname, 'IGNORE' );
1658
1659                 # Delete live links
1660                 $dbw->delete( 'links', array( 'l_to' => $id ) );
1661                 $dbw->delete( 'links', array( 'l_from' => $id ) );
1662                 $dbw->delete( 'imagelinks', array( 'il_from' => $id ) );
1663                 $dbw->delete( 'brokenlinks', array( 'bl_from' => $id ) );
1664                 $dbw->delete( 'categorylinks', array( 'cl_from' => $id ) );
1665
1666                 # Log the deletion
1667                 $log = new LogPage( 'delete' );
1668                 $log->addEntry( 'delete', $this->mTitle, $reason );
1669
1670                 # Clear the cached article id so the interface doesn't act like we exist
1671                 $this->mTitle->resetArticleID( 0 );
1672                 $this->mTitle->mArticleID = 0;
1673                 return true;
1674         }
1675
1676         /**
1677          * Revert a modification
1678          */
1679         function rollback() {
1680                 global $wgUser, $wgOut, $wgRequest;
1681                 $fname = 'Article::rollback';
1682
1683                 if ( ! $wgUser->isAllowed('rollback') ) {
1684                         $wgOut->sysopRequired();
1685                         return;
1686                 }
1687                 if ( wfReadOnly() ) {
1688                         $wgOut->readOnlyPage( $this->getContent( true ) );
1689                         return;
1690                 }
1691                 $dbw =& wfGetDB( DB_MASTER );
1692
1693                 # Enhanced rollback, marks edits rc_bot=1
1694                 $bot = $wgRequest->getBool( 'bot' );
1695
1696                 # Replace all this user's current edits with the next one down
1697                 $tt = $this->mTitle->getDBKey();
1698                 $n = $this->mTitle->getNamespace();
1699
1700                 # Get the last editor, lock table exclusively
1701                 $s = $dbw->selectRow( 'cur',
1702                         array( 'cur_id','cur_user','cur_user_text','cur_comment' ),
1703                         array( 'cur_title' => $tt, 'cur_namespace' => $n ),
1704                         $fname, 'FOR UPDATE'
1705                 );
1706                 if( $s === false ) {
1707                         # Something wrong
1708                         $wgOut->addHTML( wfMsg( 'notanarticle' ) );
1709                         return;
1710                 }
1711                 $ut = $dbw->strencode( $s->cur_user_text );
1712                 $uid = $s->cur_user;
1713                 $pid = $s->cur_id;
1714
1715                 $from = str_replace( '_', ' ', $wgRequest->getVal( 'from' ) );
1716                 if( $from != $s->cur_user_text ) {
1717                         $wgOut->setPageTitle(wfmsg('rollbackfailed'));
1718                         $wgOut->addWikiText( wfMsg( 'alreadyrolled',
1719                                 htmlspecialchars( $this->mTitle->getPrefixedText()),
1720                                 htmlspecialchars( $from ),
1721                                 htmlspecialchars( $s->cur_user_text ) ) );
1722                         if($s->cur_comment != '') {
1723                                 $wgOut->addHTML(
1724                                         wfMsg('editcomment',
1725                                         htmlspecialchars( $s->cur_comment ) ) );
1726                         }
1727                         return;
1728                 }
1729
1730                 # Get the last edit not by this guy
1731                 $s = $dbw->selectRow( 'old',
1732                         array( 'old_text','old_user','old_user_text','old_timestamp','old_flags' ),
1733                         array(
1734                                 'old_namespace' => $n,
1735                                 'old_title' => $tt,
1736                                 "old_user <> {$uid} OR old_user_text <> '{$ut}'"
1737                         ), $fname, array( 'FOR UPDATE', 'USE INDEX' => 'name_title_timestamp' )
1738                 );
1739                 if( $s === false ) {
1740                         # Something wrong
1741                         $wgOut->setPageTitle(wfMsg('rollbackfailed'));
1742                         $wgOut->addHTML( wfMsg( 'cantrollback' ) );
1743                         return;
1744                 }
1745
1746                 if ( $bot ) {
1747                         # Mark all reverted edits as bot
1748                         $dbw->update( 'recentchanges',
1749                                 array( /* SET */
1750                                         'rc_bot' => 1
1751                                 ), array( /* WHERE */
1752                                         'rc_user' => $uid,
1753                                         "rc_timestamp > '{$s->old_timestamp}'",
1754                                 ), $fname
1755                         );
1756                 }
1757
1758                 # Save it!
1759                 $newcomment = wfMsg( 'revertpage', $s->old_user_text, $from );
1760                 $wgOut->setPagetitle( wfMsg( 'actioncomplete' ) );
1761                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
1762                 $wgOut->addHTML( '<h2>' . htmlspecialchars( $newcomment ) . "</h2>\n<hr />\n" );
1763                 $this->updateArticle( Revision::getRevisionText( $s ), $newcomment, 1, $this->mTitle->userIsWatching(), $bot );
1764                 Article::onArticleEdit( $this->mTitle );
1765                 $wgOut->returnToMain( false );
1766         }
1767
1768
1769         /**
1770          * Do standard deferred updates after page view
1771          * @private
1772          */
1773         function viewUpdates() {
1774                 global $wgDeferredUpdateList;
1775
1776                 if ( 0 != $this->getID() ) {
1777                         global $wgDisableCounters;
1778                         if( !$wgDisableCounters ) {
1779                                 Article::incViewCount( $this->getID() );
1780                                 $u = new SiteStatsUpdate( 1, 0, 0 );
1781                                 array_push( $wgDeferredUpdateList, $u );
1782                         }
1783                 }
1784
1785                 # Update newtalk status if user is reading their own
1786                 # talk page
1787
1788                 global $wgUser;
1789                 if ($this->mTitle->getNamespace() == NS_USER_TALK &&
1790                         $this->mTitle->getText() == $wgUser->getName()) {
1791                         require_once( 'UserTalkUpdate.php' );
1792                         $u = new UserTalkUpdate( 0, $this->mTitle->getNamespace(), $this->mTitle->getDBkey(), false, false, false );
1793                 }
1794         }
1795
1796         /**
1797          * Do standard deferred updates after page edit.
1798          * Every 1000th edit, prune the recent changes table.
1799          * @private
1800          * @param string $text
1801          */
1802         function editUpdates( $text, $summary, $minoredit, $timestamp_of_pagechange) {
1803                 global $wgDeferredUpdateList, $wgDBname, $wgMemc;
1804                 global $wgMessageCache, $wgUser;
1805
1806                 wfSeedRandom();
1807                 if ( 0 == mt_rand( 0, 999 ) ) {
1808                         $dbw =& wfGetDB( DB_MASTER );
1809                         $cutoff = $dbw->timestamp( time() - ( 7 * 86400 ) );
1810                         $sql = "DELETE FROM recentchanges WHERE rc_timestamp < '{$cutoff}'";
1811                         $dbw->query( $sql );
1812                 }
1813                 $id = $this->getID();
1814                 $title = $this->mTitle->getPrefixedDBkey();
1815                 $shortTitle = $this->mTitle->getDBkey();
1816
1817                 $adj = $this->mCountAdjustment;
1818
1819                 if ( 0 != $id ) {
1820                         $u = new LinksUpdate( $id, $title );
1821                         array_push( $wgDeferredUpdateList, $u );
1822                         $u = new SiteStatsUpdate( 0, 1, $adj );
1823                         array_push( $wgDeferredUpdateList, $u );
1824                         $u = new SearchUpdate( $id, $title, $text );
1825                         array_push( $wgDeferredUpdateList, $u );
1826
1827                         # If this is another user's talk page,
1828                         # create a watchlist entry for this page
1829
1830                         if ($this->mTitle->getNamespace() == NS_USER_TALK &&
1831                                 $shortTitle != $wgUser->getName()) {
1832                                 require_once( 'UserTalkUpdate.php' );
1833                                 $u = new UserTalkUpdate( 1, $this->mTitle->getNamespace(), $shortTitle, $summary, $minoredit, $timestamp_of_pagechange);
1834                         }
1835
1836                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
1837                                 $wgMessageCache->replace( $shortTitle, $text );
1838                         }
1839                 }
1840         }
1841
1842         /**
1843          * @todo document this function
1844          * @private
1845          * @param string $oldid         Revision ID of this article revision
1846          */
1847         function setOldSubtitle( $oldid=0 ) {
1848                 global $wgLang, $wgOut, $wgUser;
1849
1850                 $td = $wgLang->timeanddate( $this->mTimestamp, true );
1851                 $sk = $wgUser->getSkin();
1852                 $lnk = $sk->makeKnownLinkObj ( $this->mTitle, wfMsg( 'currentrevisionlink' ) );
1853                 $prevlink = $sk->makeKnownLinkObj( $this->mTitle, wfMsg( 'previousrevision' ), 'direction=prev&oldid='.$oldid );
1854                 $nextlink = $sk->makeKnownLinkObj( $this->mTitle, wfMsg( 'nextrevision' ), 'direction=next&oldid='.$oldid );
1855                 $r = wfMsg( 'revisionasofwithlink', $td, $lnk, $prevlink, $nextlink );
1856                 $wgOut->setSubtitle( $r );
1857         }
1858
1859         /**
1860          * This function is called right before saving the wikitext,
1861          * so we can do things like signatures and links-in-context.
1862          *
1863          * @param string $text
1864          */
1865         function preSaveTransform( $text ) {
1866                 global $wgParser, $wgUser;
1867                 return $wgParser->preSaveTransform( $text, $this->mTitle, $wgUser, ParserOptions::newFromUser( $wgUser ) );
1868         }
1869
1870         /* Caching functions */
1871
1872         /**
1873          * checkLastModified returns true if it has taken care of all
1874          * output to the client that is necessary for this request.
1875          * (that is, it has sent a cached version of the page)
1876          */
1877         function tryFileCache() {
1878                 static $called = false;
1879                 if( $called ) {
1880                         wfDebug( " tryFileCache() -- called twice!?\n" );
1881                         return;
1882                 }
1883                 $called = true;
1884                 if($this->isFileCacheable()) {
1885                         $touched = $this->mTouched;
1886                         $cache = new CacheManager( $this->mTitle );
1887                         if($cache->isFileCacheGood( $touched )) {
1888                                 global $wgOut;
1889                                 wfDebug( " tryFileCache() - about to load\n" );
1890                                 $cache->loadFromFileCache();
1891                                 return true;
1892                         } else {
1893                                 wfDebug( " tryFileCache() - starting buffer\n" );
1894                                 ob_start( array(&$cache, 'saveToFileCache' ) );
1895                         }
1896                 } else {
1897                         wfDebug( " tryFileCache() - not cacheable\n" );
1898                 }
1899         }
1900
1901         /**
1902          * Check if the page can be cached
1903          * @return bool
1904          */
1905         function isFileCacheable() {
1906                 global $wgUser, $wgUseFileCache, $wgShowIPinHeader, $wgRequest;
1907                 extract( $wgRequest->getValues( 'action', 'oldid', 'diff', 'redirect', 'printable' ) );
1908
1909                 return $wgUseFileCache
1910                         and (!$wgShowIPinHeader)
1911                         and ($this->getID() != 0)
1912                         and ($wgUser->getId() == 0)
1913                         and (!$wgUser->getNewtalk())
1914                         and ($this->mTitle->getNamespace() != NS_SPECIAL )
1915                         and (empty( $action ) || $action == 'view')
1916                         and (!isset($oldid))
1917                         and (!isset($diff))
1918                         and (!isset($redirect))
1919                         and (!isset($printable))
1920                         and (!$this->mRedirectedFrom);
1921         }
1922
1923         /**
1924          * Loads cur_touched and returns a value indicating if it should be used
1925          *
1926          */
1927         function checkTouched() {
1928                 $fname = 'Article::checkTouched';
1929                 $id = $this->getID();
1930                 $dbr =& $this->getDB();
1931                 $s = $dbr->selectRow( 'page', array( 'page_touched', 'page_is_redirect' ),
1932                         array( 'page_id' => $id ), $fname, $this->getSelectOptions() );
1933                 if( $s !== false ) {
1934                         $this->mTouched = wfTimestamp( TS_MW, $s->page_touched );
1935                         return !$s->page_is_redirect;
1936                 } else {
1937                         return false;
1938                 }
1939         }
1940
1941         /**
1942          * Edit an article without doing all that other stuff
1943          *
1944          * @param string $text text submitted
1945          * @param string $comment comment submitted
1946          * @param integer $minor whereas it's a minor modification
1947          */
1948         function quickEdit( $text, $comment = '', $minor = 0 ) {
1949                 global $wgUser;
1950                 $fname = 'Article::quickEdit';
1951
1952                 #wfDebugDieBacktrace( "$fname called." );
1953
1954                 wfProfileIn( $fname );
1955
1956                 $dbw =& wfGetDB( DB_MASTER );
1957                 $ns = $this->mTitle->getNamespace();
1958                 $dbkey = $this->mTitle->getDBkey();
1959                 $encDbKey = $dbw->strencode( $dbkey );
1960                 $timestamp = wfTimestampNow();
1961                 # insert new text
1962                 $dbw->insert( 'text', array(
1963                                 'old_text' => $text,
1964                                 'old_flags' => "" ), $fname );
1965                 $text_id = $dbw->insertID();
1966
1967                 # update page
1968                 $dbw->update( 'page', array(
1969                         'page_is_new' => 0,
1970                         'page_touched' => $timestamp,
1971                         'page_is_redirect' => $this->isRedirect( $text ) ? 1 : 0,
1972                         'page_latest' => $text_id ),
1973                         array( 'page_namespace' => $ns, 'page_title' => $dbkey ), $fname );
1974                 # Retrieve page ID
1975                 $page_id = $dbw->selectField( 'page', 'page_id', array( 'page_namespace' => $ns, 'page_title' => $dbkey ), $fname );
1976
1977                 # update revision
1978                 $dbw->insert( 'revision', array(
1979                         'rev_id' => $text_id,
1980                         'rev_page' => $page_id,
1981                         'rev_comment' => $comment,
1982                         'rev_user' => $wgUser->getID(),
1983                         'rev_user_text' => $wgUser->getName(),
1984                         'rev_timestamp' => $timestamp,
1985                         'inverse_timestamp' => wfInvertTimestamp( $timestamp ),
1986                         'rev_minor_edit' => intval($minor) ),
1987                         $fname );
1988 /*
1989                 # Save to history
1990                 $dbw->insertSelect( 'old', 'cur',
1991                         array(
1992                                 'old_namespace' => 'cur_namespace',
1993                                 'old_title' => 'cur_title',
1994                                 'old_text' => 'cur_text',
1995                                 'old_comment' => 'cur_comment',
1996                                 'old_user' => 'cur_user',
1997                                 'old_user_text' => 'cur_user_text',
1998                                 'old_timestamp' => 'cur_timestamp',
1999                                 'inverse_timestamp' => '99999999999999-cur_timestamp',
2000                         ), array(
2001                                 'cur_namespace' => $ns,
2002                                 'cur_title' => $dbkey,
2003                         ), $fname
2004                 );
2005
2006                 # Use the affected row count to determine if the article is new
2007                 $numRows = $dbw->affectedRows();
2008
2009                 # Make an array of fields to be inserted
2010                 $fields = array(
2011                         'cur_text' => $text,
2012                         'cur_timestamp' => $timestamp,
2013                         'cur_user' => $wgUser->getID(),
2014                         'cur_user_text' => $wgUser->getName(),
2015                         'inverse_timestamp' => wfInvertTimestamp( $timestamp ),
2016                         'cur_comment' => $comment,
2017                         'cur_is_redirect' => $this->isRedirect( $text ) ? 1 : 0,
2018                         'cur_minor_edit' => intval($minor),
2019                         'cur_touched' => $dbw->timestamp($timestamp),
2020                 );
2021
2022                 if ( $numRows ) {
2023                         # Update article
2024                         $fields['cur_is_new'] = 0;
2025                         $dbw->update( 'cur', $fields, array( 'cur_namespace' => $ns, 'cur_title' => $dbkey ), $fname );
2026                 } else {
2027                         # Insert new article
2028                         $fields['cur_is_new'] = 1;
2029                         $fields['cur_namespace'] = $ns;
2030                         $fields['cur_title'] = $dbkey;
2031                         $fields['cur_random'] = $rand = wfRandom();
2032                         $dbw->insert( 'cur', $fields, $fname );
2033                 }
2034 */
2035                 wfProfileOut( $fname );
2036         }
2037
2038         /**
2039          * Used to increment the view counter
2040          *
2041          * @static
2042          * @param integer $id article id
2043          */
2044         function incViewCount( $id ) {
2045                 $id = intval( $id );
2046                 global $wgHitcounterUpdateFreq;
2047
2048                 $dbw =& wfGetDB( DB_MASTER );
2049                 $pageTable = $dbw->tableName( 'page' );
2050                 $hitcounterTable = $dbw->tableName( 'hitcounter' );
2051                 $acchitsTable = $dbw->tableName( 'acchits' );
2052
2053                 if( $wgHitcounterUpdateFreq <= 1 ){ //
2054                         $dbw->query( "UPDATE $pageTable SET page_counter = page_counter + 1 WHERE page_id = $id" );
2055                         return;
2056                 }
2057
2058                 # Not important enough to warrant an error page in case of failure
2059                 $oldignore = $dbw->ignoreErrors( true );
2060
2061                 $dbw->query( "INSERT INTO $hitcounterTable (hc_id) VALUES ({$id})" );
2062
2063                 $checkfreq = intval( $wgHitcounterUpdateFreq/25 + 1 );
2064                 if( (rand() % $checkfreq != 0) or ($dbw->lastErrno() != 0) ){
2065                         # Most of the time (or on SQL errors), skip row count check
2066                         $dbw->ignoreErrors( $oldignore );
2067                         return;
2068                 }
2069
2070                 $res = $dbw->query("SELECT COUNT(*) as n FROM $hitcounterTable");
2071                 $row = $dbw->fetchObject( $res );
2072                 $rown = intval( $row->n );
2073                 if( $rown >= $wgHitcounterUpdateFreq ){
2074                         wfProfileIn( 'Article::incViewCount-collect' );
2075                         $old_user_abort = ignore_user_abort( true );
2076
2077                         $dbw->query("LOCK TABLES $hitcounterTable WRITE");
2078                         $dbw->query("CREATE TEMPORARY TABLE $acchitsTable TYPE=HEAP ".
2079                                 "SELECT hc_id,COUNT(*) AS hc_n FROM $hitcounterTable ".
2080                                 'GROUP BY hc_id');
2081                         $dbw->query("DELETE FROM $hitcounterTable");
2082                         $dbw->query('UNLOCK TABLES');
2083                         $dbw->query("UPDATE $curTable,$acchitsTable SET cur_counter=cur_counter + hc_n ".
2084                                 'WHERE cur_id = hc_id');
2085                         $dbw->query("DROP TABLE $acchitsTable");
2086
2087                         ignore_user_abort( $old_user_abort );
2088                         wfProfileOut( 'Article::incViewCount-collect' );
2089                 }
2090                 $dbw->ignoreErrors( $oldignore );
2091         }
2092
2093         /**#@+
2094          * The onArticle*() functions are supposed to be a kind of hooks
2095          * which should be called whenever any of the specified actions
2096          * are done.
2097          *
2098          * This is a good place to put code to clear caches, for instance.
2099          *
2100          * This is called on page move and undelete, as well as edit
2101          * @static
2102          * @param $title_obj a title object
2103          */
2104
2105         function onArticleCreate($title_obj) {
2106                 global $wgUseSquid, $wgDeferredUpdateList;
2107
2108                 $titles = $title_obj->getBrokenLinksTo();
2109
2110                 # Purge squid
2111                 if ( $wgUseSquid ) {
2112                         $urls = $title_obj->getSquidURLs();
2113                         foreach ( $titles as $linkTitle ) {
2114                                 $urls[] = $linkTitle->getInternalURL();
2115                         }
2116                         $u = new SquidUpdate( $urls );
2117                         array_push( $wgDeferredUpdateList, $u );
2118                 }
2119
2120                 # Clear persistent link cache
2121                 LinkCache::linksccClearBrokenLinksTo( $title_obj->getPrefixedDBkey() );
2122         }
2123
2124         function onArticleDelete($title_obj) {
2125                 LinkCache::linksccClearLinksTo( $title_obj->getArticleID() );
2126         }
2127         function onArticleEdit($title_obj) {
2128                 LinkCache::linksccClearPage( $title_obj->getArticleID() );
2129         }
2130         /**#@-*/
2131
2132         /**
2133          * Info about this page
2134          */
2135         function info() {
2136                 global $wgUser, $wgTitle, $wgOut, $wgAllowPageInfo;
2137                 $fname = 'Article::info';
2138
2139                 if ( !$wgAllowPageInfo ) {
2140                         $wgOut->errorpage( 'nosuchaction', 'nosuchactiontext' );
2141                         return;
2142                 }
2143
2144                 $dbr =& $this->getDB();
2145
2146                 $basenamespace = $wgTitle->getNamespace() & (~1);
2147                 $cur_clause = array( 'cur_title' => $wgTitle->getDBkey(), 'cur_namespace' => $basenamespace );
2148                 $old_clause = array( 'old_title' => $wgTitle->getDBkey(), 'old_namespace' => $basenamespace );
2149                 $wl_clause  = array( 'wl_title' => $wgTitle->getDBkey(), 'wl_namespace' => $basenamespace );
2150                 $fullTitle = $wgTitle->makeName($basenamespace, $wgTitle->getDBKey());
2151                 $wgOut->setPagetitle(  $fullTitle );
2152                 $wgOut->setSubtitle( wfMsg( 'infosubtitle' ));
2153
2154                 # first, see if the page exists at all.
2155                 $exists = $dbr->selectField( 'cur', 'COUNT(*)', $cur_clause, $fname, $this->getSelectOptions() );
2156                 if ($exists < 1) {
2157                         $wgOut->addHTML( wfMsg('noarticletext') );
2158                 } else {
2159                         $numwatchers = $dbr->selectField( 'watchlist', 'COUNT(*)', $wl_clause, $fname,
2160                                 $this->getSelectOptions() );
2161                         $wgOut->addHTML( "<ul><li>" . wfMsg("numwatchers", $numwatchers) . '</li>' );
2162                         $old = $dbr->selectField( 'old', 'COUNT(*)', $old_clause, $fname, $this->getSelectOptions() );
2163                         $wgOut->addHTML( "<li>" . wfMsg('numedits', $old + 1) . '</li>');
2164
2165                         # to find number of distinct authors, we need to do some
2166                         # funny stuff because of the cur/old table split:
2167                         # - first, find the name of the 'cur' author
2168                         # - then, find the number of *other* authors in 'old'
2169
2170                         # find 'cur' author
2171                         $cur_author = $dbr->selectField( 'cur', 'cur_user_text', $cur_clause, $fname,
2172                                 $this->getSelectOptions() );
2173
2174                         # find number of 'old' authors excluding 'cur' author
2175                         $authors = $dbr->selectField( 'old', 'COUNT(DISTINCT old_user_text)',
2176                                 $old_clause + array( 'old_user_text<>' . $dbr->addQuotes( $cur_author ) ), $fname,
2177                                 $this->getSelectOptions() ) + 1;
2178
2179                         # now for the Talk page ...
2180                         $cur_clause = array( 'cur_title' => $wgTitle->getDBkey(), 'cur_namespace' => $basenamespace+1 );
2181                         $old_clause = array( 'old_title' => $wgTitle->getDBkey(), 'old_namespace' => $basenamespace+1 );
2182
2183                         # does it exist?
2184                         $exists = $dbr->selectField( 'cur', 'COUNT(*)', $cur_clause, $fname, $this->getSelectOptions() );
2185
2186                         # number of edits
2187                         if ($exists > 0) {
2188                                 $old = $dbr->selectField( 'old', 'COUNT(*)', $old_clause, $fname, $this->getSelectOptions() );
2189                                 $wgOut->addHTML( '<li>' . wfMsg("numtalkedits", $old + 1) . '</li>');
2190                         }
2191                         $wgOut->addHTML( '<li>' . wfMsg("numauthors", $authors) . '</li>' );
2192
2193                         # number of authors
2194                         if ($exists > 0) {
2195                                 $cur_author = $dbr->selectField( 'cur', 'cur_user_text', $cur_clause, $fname,
2196                                         $this->getSelectOptions() );
2197                                 $authors = $dbr->selectField( 'cur', 'COUNT(DISTINCT old_user_text)',
2198                                         $old_clause + array( 'old_user_text<>' . $dbr->addQuotes( $cur_author ) ),
2199                                         $fname, $this->getSelectOptions() );
2200
2201                                 $wgOut->addHTML( '<li>' . wfMsg('numtalkauthors', $authors) . '</li></ul>' );
2202                         }
2203                 }
2204         }
2205 }
2206
2207 /**
2208  * Check whether an article is a stub
2209  *
2210  * @public
2211  * @param integer $articleID    ID of the article that is to be checked
2212  */
2213 function wfArticleIsStub( $articleID ) {
2214         global $wgUser;
2215         $fname = 'wfArticleIsStub';
2216
2217         $threshold = $wgUser->getOption('stubthreshold') ;
2218         if ( $threshold > 0 ) {
2219                 $dbr =& wfGetDB( DB_SLAVE );
2220                 $s = $dbr->selectRow( array('page', 'text'),
2221                         array( 'LENGTH(old_text) AS len', 'page_namespace', 'page_is_redirect' ),
2222                         array( 'page_id' => $articleID, "page.page_latest=text.old_id" ),
2223                         $fname ) ;
2224                 if ( $s == false OR $s->page_is_redirect OR $s->page_namespace != 0 ) {
2225                         return false;
2226                 }
2227                 $size = $s->len;
2228                 return ( $size < $threshold );
2229         }
2230         return false;
2231 }
2232
2233 ?>