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
  12 $wgArticleCurContentFields = false;
  13 $wgArticleOldContentFields = false;
  14
  15 /**
  16  * Class representing a Wikipedia article and history.
  17  *
  18  * See design.doc for an overview.
  19  * Note: edit user interface and cache support functions have been
  20  * moved to separate EditPage and CacheManager classes.
  21  *
  22  * @package MediaWiki
  23  */
  24 class Article {
  25         /**#@+
  26          * @access private
  27          */
  28         var $mContent, $mContentLoaded;
  29         var $mUser, $mTimestamp, $mUserText;
  30         var $mCounter, $mComment, $mCountAdjustment;
  31         var $mMinorEdit, $mRedirectedFrom;
  32         var $mTouched, $mFileCache, $mTitle;
  33         var $mId, $mTable;
  34         var $mForUpdate;
  35         /**#@-*/
  36
  37         /**
  38          * Constructor and clear the article
  39          * @param mixed &$title
  40          */
  41         function Article( &$title ) {
  42                 $this->mTitle =& $title;
  43                 $this->clear();
  44         }
  45
  46         /**
  47           * Clear the object
  48           * @private
  49           */
  50         function clear() {
  51                 $this->mContentLoaded = false;
  52                 $this->mCurID = $this->mUser = $this->mCounter = -1; # Not loaded
  53                 $this->mRedirectedFrom = $this->mUserText =
  54                 $this->mTimestamp = $this->mComment = $this->mFileCache = '';
  55                 $this->mCountAdjustment = 0;
  56                 $this->mTouched = '19700101000000';
  57                 $this->mForUpdate = false;
  58         }
  59
  60         /**
  61           * Get revision text associated with an old or archive row
  62           * $row is usually an object from wfFetchRow(), both the flags and the text
  63           * field must be included
  64           * @static
  65           * @param integer $row Id of a row
  66           * @param string $prefix table prefix (default 'old_')
  67           * @return string $text|false the text requested
  68         */
  69         function getRevisionText( $row, $prefix = 'old_' ) {
  70                 $fname = 'Article::getRevisionText';
  71                 wfProfileIn( $fname );
  72
  73                 # Get data
  74                 $textField = $prefix . 'text';
  75                 $flagsField = $prefix . 'flags';
  76
  77                 if( isset( $row->$flagsField ) ) {
  78                         $flags = explode( ',', $row->$flagsField );
  79                 } else {
  80                         $flags = array();
  81                 }
  82
  83                 if( isset( $row->$textField ) ) {
  84                         $text = $row->$textField;
  85                 } else {
  86                         return false;
  87                 }
  88
  89                 if( in_array( 'gzip', $flags ) ) {
  90                         # Deal with optional compression of archived pages.
  91                         # This can be done periodically via maintenance/compressOld.php, and
  92                         # as pages are saved if $wgCompressRevisions is set.
  93                         $text = gzinflate( $text );
  94                 }
  95
  96                 if( in_array( 'object', $flags ) ) {
  97                         # Generic compressed storage
  98                         $obj = unserialize( $text );
  99
 100                         # Bugger, corrupted my test database by double-serializing
 101                         if ( !is_object( $obj ) ) {
 102                                 $obj = unserialize( $obj );
 103                         }
 104
 105                         $text = $obj->getText();
 106                 }
 107
 108                 global $wgLegacyEncoding;
 109                 if( $wgLegacyEncoding && !in_array( 'utf-8', $flags ) ) {
 110                         # Old revisions kept around in a legacy encoding?
 111                         # Upconvert on demand.
 112                         global $wgInputEncoding, $wgContLang;
 113                         $text = $wgContLang->iconv( $wgLegacyEncoding, $wgInputEncoding, $text );
 114                 }
 115                 wfProfileOut( $fname );
 116                 return $text;
 117         }
 118
 119         /**
 120          * If $wgCompressRevisions is enabled, we will compress data.
 121          * The input string is modified in place.
 122          * Return value is the flags field: contains 'gzip' if the
 123          * data is compressed, and 'utf-8' if we're saving in UTF-8
 124          * mode.
 125          *
 126          * @static
 127          * @param mixed $text reference to a text
 128          * @return string
 129          */
 130         function compressRevisionText( &$text ) {
 131                 global $wgCompressRevisions, $wgUseLatin1;
 132                 $flags = array();
 133                 if( !$wgUseLatin1 ) {
 134                         # Revisions not marked this way will be converted
 135                         # on load if $wgLegacyCharset is set in the future.
 136                         $flags[] = 'utf-8';
 137                 }
 138                 if( $wgCompressRevisions ) {
 139                         if( function_exists( 'gzdeflate' ) ) {
 140                                 $text = gzdeflate( $text );
 141                                 $flags[] = 'gzip';
 142                         } else {
 143                                 wfDebug( "Article::compressRevisionText() -- no zlib support, not compressing\n" );
 144                         }
 145                 }
 146                 return implode( ',', $flags );
 147         }
 148
 149         /**
 150          * Note that getContent/loadContent may follow redirects if
 151          * not told otherwise, and so may cause a change to mTitle.
 152          *
 153          * @param $noredir
 154          * @return Return the text of this revision
 155         */
 156         function getContent( $noredir ) {
 157                 global $wgRequest;
 158
 159                 # Get variables from query string :P
 160                 $action = $wgRequest->getText( 'action', 'view' );
 161                 $section = $wgRequest->getText( 'section' );
 162
 163                 $fname =  'Article::getContent';
 164                 wfProfileIn( $fname );
 165
 166                 if ( 0 == $this->getID() ) {
 167                         if ( 'edit' == $action ) {
 168                                 wfProfileOut( $fname );
 169                                 return ''; # was "newarticletext", now moved above the box)
 170                         }
 171                         wfProfileOut( $fname );
 172                         return wfMsg( 'noarticletext' );
 173                 } else {
 174                         $this->loadContent( $noredir );
 175                         # check if we're displaying a [[User talk:x.x.x.x]] anonymous talk page
 176                         if ( $this->mTitle->getNamespace() == NS_USER_TALK &&
 177                           preg_match('/^\d{1,3}\.\d{1,3}.\d{1,3}\.\d{1,3}$/',$this->mTitle->getText()) &&
 178                           $action=='view'
 179                         ) {
 180                                 wfProfileOut( $fname );
 181                                 return $this->mContent . "\n" .wfMsg('anontalkpagetext');
 182                         } else {
 183                                 if($action=='edit') {
 184                                         if($section!='') {
 185                                                 if($section=='new') {
 186                                                         wfProfileOut( $fname );
 187                                                         return '';
 188                                                 }
 189
 190                                                 # strip NOWIKI etc. to avoid confusion (true-parameter causes HTML
 191                                                 # comments to be stripped as well)
 192                                                 $rv=$this->getSection($this->mContent,$section);
 193                                                 wfProfileOut( $fname );
 194                                                 return $rv;
 195                                         }
 196                                 }
 197                                 wfProfileOut( $fname );
 198                                 return $this->mContent;
 199                         }
 200                 }
 201         }
 202
 203         /**
 204          * This function returns the text of a section, specified by a number ($section).
 205          * A section is text under a heading like == Heading == or <h1>Heading</h1>, or
 206          * the first section before any such heading (section 0).
 207          *
 208          * If a section contains subsections, these are also returned.
 209          *
 210          * @param string $text text to look in
 211          * @param integer $section section number
 212          * @return string text of the requested section
 213          */
 214         function getSection($text,$section) {
 215
 216                 # strip NOWIKI etc. to avoid confusion (true-parameter causes HTML
 217                 # comments to be stripped as well)
 218                 $striparray=array();
 219                 $parser=new Parser();
 220                 $parser->mOutputType=OT_WIKI;
 221                 $striptext=$parser->strip($text, $striparray, true);
 222
 223                 # now that we can be sure that no pseudo-sections are in the source,
 224                 # split it up by section
 225                 $secs =
 226                   preg_split(
 227                   '/(^=+.+?=+|^<h[1-6].*?' . '>.*?<\/h[1-6].*?' . '>)(?!\S)/mi',
 228                   $striptext, -1,
 229                   PREG_SPLIT_DELIM_CAPTURE);
 230                 if($section==0) {
 231                         $rv=$secs[0];
 232                 } else {
 233                         $headline=$secs[$section*2-1];
 234                         preg_match( '/^(=+).+?=+|^<h([1-6]).*?' . '>.*?<\/h[1-6].*?' . '>(?!\S)/mi',$headline,$matches);
 235                         $hlevel=$matches[1];
 236
 237                         # translate wiki heading into level
 238                         if(strpos($hlevel,'=')!==false) {
 239                                 $hlevel=strlen($hlevel);
 240                         }
 241
 242                         $rv=$headline. $secs[$section*2];
 243                         $count=$section+1;
 244
 245                         $break=false;
 246                         while(!empty($secs[$count*2-1]) && !$break) {
 247
 248                                 $subheadline=$secs[$count*2-1];
 249                                 preg_match( '/^(=+).+?=+|^<h([1-6]).*?' . '>.*?<\/h[1-6].*?' . '>(?!\S)/mi',$subheadline,$matches);
 250                                 $subhlevel=$matches[1];
 251                                 if(strpos($subhlevel,'=')!==false) {
 252                                         $subhlevel=strlen($subhlevel);
 253                                 }
 254                                 if($subhlevel > $hlevel) {
 255                                         $rv.=$subheadline.$secs[$count*2];
 256                                 }
 257                                 if($subhlevel <= $hlevel) {
 258                                         $break=true;
 259                                 }
 260                                 $count++;
 261
 262                         }
 263                 }
 264                 # reinsert stripped tags
 265                 $rv=$parser->unstrip($rv,$striparray);
 266                 $rv=$parser->unstripNoWiki($rv,$striparray);
 267                 $rv=trim($rv);
 268                 return $rv;
 269
 270         }
 271
 272         /**
 273          * Return an array of the columns of the "cur"-table
 274          */
 275         function &getCurContentFields() {
 276                 global $wgArticleCurContentFields;
 277                 if ( !$wgArticleCurContentFields ) {
 278                         $wgArticleCurContentFields = array( 'cur_text','cur_timestamp','cur_user', 'cur_user_text',
 279                           'cur_comment','cur_counter','cur_restrictions','cur_touched' );
 280                 }
 281                 return $wgArticleCurContentFields;
 282         }
 283
 284         /**
 285          * Return an array of the columns of the "old"-table
 286          */
 287         function &getOldContentFields() {
 288                 global $wgArticleOldContentFields;
 289                 if ( !$wgArticleOldContentFields ) {
 290                         $wgArticleOldContentFields = array( 'old_namespace','old_title','old_text','old_timestamp',
 291                           'old_user','old_user_text','old_comment','old_flags' );
 292                 }
 293                 return $wgArticleOldContentFields;
 294         }
 295
 296         /**
 297          * Return the oldid of the article that is to be shown.
 298          * For requests with a "direction", this is not the oldid of the
 299          * query
 300          */
 301         function getOldID() {
 302                 global $wgRequest, $wgOut;
 303                 static $lastid;
 304
 305                 if ( isset( $lastid ) ) {
 306                         return $lastid;
 307                 }
 308
 309                 $oldid = $wgRequest->getVal( 'oldid' );
 310                 if ( isset( $oldid ) ) {
 311                         $dbr =& $this->getDB();
 312                         $oldid = IntVal( $oldid );
 313                         if ( $wgRequest->getVal( 'direction' ) == 'next' ) {
 314                                 $nextid = $this->mTitle->getNextRevisionID( $oldid );
 315                                 if ( $nextid ) {
 316                                         $oldid = $nextid;
 317                                 } else {
 318                                         $wgOut->redirect( $this->mTitle->getFullURL( 'redirect=no' ) );
 319                                 }
 320                         } elseif ( $wgRequest->getVal( 'direction' ) == 'prev' ) {
 321                                 $previd = $this->mTitle->getPreviousRevisionID( $oldid );
 322                                 if ( $previd ) {
 323                                         $oldid = $previd;
 324                                 } else {
 325                                         # TODO
 326                                 }
 327                         }
 328                         $lastid = $oldid;
 329                 }
 330                 return @$oldid; # "@" to be able to return "unset" without PHP complaining
 331         }
 332
 333
 334         /**
 335          * Load the revision (including cur_text) into this object
 336         */
 337         function loadContent( $noredir = false ) {
 338                 global $wgOut, $wgRequest;
 339
 340                 if ( $this->mContentLoaded ) return;
 341
 342                 $dbr =& $this->getDB();
 343                 # Query variables :P
 344                 $oldid = $this->getOldID();
 345                 $redirect = $wgRequest->getVal( 'redirect' );
 346
 347                 $fname = 'Article::loadContent';
 348
 349                 # Pre-fill content with error message so that if something
 350                 # fails we'll have something telling us what we intended.
 351
 352                 $t = $this->mTitle->getPrefixedText();
 353
 354                 if ( isset( $oldid ) ) {
 355                         $t .= ',oldid='.$oldid;
 356                 }
 357                 if ( isset( $redirect ) ) {
 358                         $redirect = ($redirect == 'no') ? 'no' : 'yes';
 359                         $t .= ',redirect='.$redirect;
 360                 }
 361                 $this->mContent = wfMsg( 'missingarticle', $t );
 362
 363                 if ( ! $oldid ) {       # Retrieve current version
 364                         $id = $this->getID();
 365                         if ( 0 == $id ) return;
 366
 367                         $s = $dbr->selectRow( 'cur', $this->getCurContentFields(), array( 'cur_id' => $id ), $fname,
 368                                 $this->getSelectOptions() );
 369                         if ( $s === false ) {
 370                                 return;
 371                         }
 372
 373                         # If we got a redirect, follow it (unless we've been told
 374                         # not to by either the function parameter or the query
 375                         if ( ( 'no' != $redirect ) && ( false == $noredir ) ) {
 376                                 $rt = Title::newFromRedirect( $s->cur_text );
 377                                 # process if title object is valid and not special:userlogout
 378                                 if ( $rt && ! ( $rt->getNamespace() == NS_SPECIAL && $rt->getText() == 'Userlogout' ) ) {
 379                                         # Gotta hand redirects to special pages differently:
 380                                         # Fill the HTTP response "Location" header and ignore
 381                                         # the rest of the page we're on.
 382
 383                                         if ( $rt->getInterwiki() != '' ) {
 384                                                 $wgOut->redirect( $rt->getFullURL() ) ;
 385                                                 return;
 386                                         }
 387                                         if ( $rt->getNamespace() == NS_SPECIAL ) {
 388                                                 $wgOut->redirect( $rt->getFullURL() );
 389                                                 return;
 390                                         }
 391                                         $rid = $rt->getArticleID();
 392                                         if ( 0 != $rid ) {
 393                                                 $redirRow = $dbr->selectRow( 'cur', $this->getCurContentFields(),
 394                                                         array( 'cur_id' => $rid ), $fname, $this->getSelectOptions() );
 395
 396                                                 if ( $redirRow !== false ) {
 397                                                         $this->mRedirectedFrom = $this->mTitle->getPrefixedText();
 398                                                         $this->mTitle = $rt;
 399                                                         $s = $redirRow;
 400                                                 }
 401                                         }
 402                                 }
 403                         }
 404
 405                         $this->mContent = $s->cur_text;
 406                         $this->mUser = $s->cur_user;
 407                         $this->mUserText = $s->cur_user_text;
 408                         $this->mComment = $s->cur_comment;
 409                         $this->mCounter = $s->cur_counter;
 410                         $this->mTimestamp = wfTimestamp(TS_MW,$s->cur_timestamp);
 411                         $this->mTouched = wfTimestamp(TS_MW,$s->cur_touched);
 412                         $this->mTitle->loadRestrictions( $s->cur_restrictions );
 413                 } else { # oldid set, retrieve historical version
 414                         $s = $dbr->selectRow( 'old', $this->getOldContentFields(), array( 'old_id' => $oldid ),
 415                                 $fname, $this->getSelectOptions() );
 416                         if ( $s === false ) {
 417                                 return;
 418                         }
 419
 420                         if( $this->mTitle->getNamespace() != $s->old_namespace ||
 421                                 $this->mTitle->getDBkey() != $s->old_title ) {
 422                                 $oldTitle = Title::makeTitle( $s->old_namesapce, $s->old_title );
 423                                 $this->mTitle = $oldTitle;
 424                                 $wgTitle = $oldTitle;
 425                         }
 426                         $this->mContent = Article::getRevisionText( $s );
 427                         $this->mUser = $s->old_user;
 428                         $this->mUserText = $s->old_user_text;
 429                         $this->mComment = $s->old_comment;
 430                         $this->mCounter = 0;
 431                         $this->mTimestamp = wfTimestamp(TS_MW,$s->old_timestamp);
 432                 }
 433                 $this->mContentLoaded = true;
 434                 return $this->mContent;
 435         }
 436
 437         /**
 438          * Gets the article text without using so many damn globals
 439          * Returns false on error
 440          *
 441          * @param integer $oldid
 442          */
 443         function getContentWithoutUsingSoManyDamnGlobals( $oldid = 0, $noredir = false ) {
 444                 if ( $this->mContentLoaded ) {
 445                         return $this->mContent;
 446                 }
 447                 $this->mContent = false;
 448
 449                 $fname = 'Article::getContentWithout';
 450                 $dbr =& $this->getDB();
 451
 452                 if ( ! $oldid ) {       # Retrieve current version
 453                         $id = $this->getID();
 454                         if ( 0 == $id ) {
 455                                 return false;
 456                         }
 457
 458                         $s = $dbr->selectRow( 'cur', $this->getCurContentFields(), array( 'cur_id' => $id ),
 459                                 $fname, $this->getSelectOptions() );
 460                         if ( $s === false ) {
 461                                 return false;
 462                         }
 463
 464                         # If we got a redirect, follow it (unless we've been told
 465                         # not to by either the function parameter or the query
 466                         if ( !$noredir ) {
 467                                 $rt = Title::newFromRedirect( $s->cur_text );
 468                                 if( $rt &&  $rt->getInterwiki() == '' && $rt->getNamespace() != NS_SPECIAL ) {
 469                                         $rid = $rt->getArticleID();
 470                                         if ( 0 != $rid ) {
 471                                                 $redirRow = $dbr->selectRow( 'cur', $this->getCurContentFields(),
 472                                                         array( 'cur_id' => $rid ), $fname, $this->getSelectOptions() );
 473
 474                                                 if ( $redirRow !== false ) {
 475                                                         $this->mRedirectedFrom = $this->mTitle->getPrefixedText();
 476                                                         $this->mTitle = $rt;
 477                                                         $s = $redirRow;
 478                                                 }
 479                                         }
 480                                 }
 481                         }
 482
 483                         $this->mContent = $s->cur_text;
 484                         $this->mUser = $s->cur_user;
 485                         $this->mUserText = $s->cur_user_text;
 486                         $this->mComment = $s->cur_comment;
 487                         $this->mCounter = $s->cur_counter;
 488                         $this->mTimestamp = wfTimestamp(TS_MW,$s->cur_timestamp);
 489                         $this->mTouched = wfTimestamp(TS_MW,$s->cur_touched);
 490                         $this->mTitle->loadRestrictions( $s->cur_restrictions );
 491                 } else { # oldid set, retrieve historical version
 492                         $s = $dbr->selectRow( 'old', $this->getOldContentFields(), array( 'old_id' => $oldid ),
 493                                 $fname, $this->getSelectOptions() );
 494                         if ( $s === false ) {
 495                                 return false;
 496                         }
 497                         $this->mContent = Article::getRevisionText( $s );
 498                         $this->mUser = $s->old_user;
 499                         $this->mUserText = $s->old_user_text;
 500                         $this->mComment = $s->old_comment;
 501                         $this->mCounter = 0;
 502                         $this->mTimestamp = wfTimestamp(TS_MW,$s->old_timestamp);
 503                 }
 504                 $this->mContentLoaded = true;
 505                 return $this->mContent;
 506         }
 507
 508         /**
 509          * Read/write accessor to select FOR UPDATE
 510          */
 511         function forUpdate( $x = NULL ) {
 512                 return wfSetVar( $this->mForUpdate, $x );
 513         }
 514
 515         /**
 516          * Get the database which should be used for reads
 517          */
 518         function &getDB() {
 519                 if ( $this->mForUpdate ) {
 520                         return wfGetDB( DB_MASTER );
 521                 } else {
 522                         return wfGetDB( DB_SLAVE );
 523                 }
 524         }
 525
 526         /**
 527          * Get options for all SELECT statements
 528          * Can pass an option array, to which the class-wide options will be appended
 529          */
 530         function getSelectOptions( $options = '' ) {
 531                 if ( $this->mForUpdate ) {
 532                         if ( $options ) {
 533                                 $options[] = 'FOR UPDATE';
 534                         } else {
 535                                 $options = 'FOR UPDATE';
 536                         }
 537                 }
 538                 return $options;
 539         }
 540
 541         /**
 542          * Return the Article ID
 543          */
 544         function getID() {
 545                 if( $this->mTitle ) {
 546                         return $this->mTitle->getArticleID();
 547                 } else {
 548                         return 0;
 549                 }
 550         }
 551
 552         /**
 553          * Get the view count for this article
 554          */
 555         function getCount() {
 556                 if ( -1 == $this->mCounter ) {
 557                         $id = $this->getID();
 558                         $dbr =& $this->getDB();
 559                         $this->mCounter = $dbr->selectField( 'cur', 'cur_counter', 'cur_id='.$id,
 560                                 'Article::getCount', $this->getSelectOptions() );
 561                 }
 562                 return $this->mCounter;
 563         }
 564
 565         /**
 566          * Would the given text make this article a "good" article (i.e.,
 567          * suitable for including in the article count)?
 568          */
 569         function isCountable( $text ) {
 570                 global $wgUseCommaCount;
 571
 572                 if ( 0 != $this->mTitle->getNamespace() ) { return 0; }
 573                 if ( $this->isRedirect( $text ) ) { return 0; }
 574                 $token = ($wgUseCommaCount ? ',' : '[[' );
 575                 if ( false === strstr( $text, $token ) ) { return 0; }
 576                 return 1;
 577         }
 578
 579         /**
 580          * Tests if the article text represents a redirect
 581          */
 582         function isRedirect( $text = false ) {
 583                 if ( $text === false ) {
 584                         $this->loadContent();
 585                         $titleObj = Title::newFromRedirect( $this->mText );
 586                 } else {
 587                         $titleObj = Title::newFromRedirect( $text );
 588                 }
 589                 return $titleObj !== NULL;
 590         }
 591
 592         /**
 593          * Loads everything from cur except cur_text
 594          * This isn't necessary for all uses, so it's only done if needed.
 595          * @private
 596          */
 597         function loadLastEdit() {
 598                 global $wgOut;
 599                 if ( -1 != $this->mUser ) return;
 600
 601                 $fname = 'Article::loadLastEdit';
 602
 603                 $dbr =& $this->getDB();
 604                 $s = $dbr->selectRow( 'cur',
 605                   array( 'cur_user','cur_user_text','cur_timestamp', 'cur_comment','cur_minor_edit' ),
 606                   array( 'cur_id' => $this->getID() ), $fname, $this->getSelectOptions() );
 607
 608                 if ( $s !== false ) {
 609                         $this->mUser = $s->cur_user;
 610                         $this->mUserText = $s->cur_user_text;
 611                         $this->mTimestamp = wfTimestamp(TS_MW,$s->cur_timestamp);
 612                         $this->mComment = $s->cur_comment;
 613                         $this->mMinorEdit = $s->cur_minor_edit;
 614                 }
 615         }
 616
 617         function getTimestamp() {
 618                 $this->loadLastEdit();
 619                 return $this->mTimestamp;
 620         }
 621
 622         function getUser() {
 623                 $this->loadLastEdit();
 624                 return $this->mUser;
 625         }
 626
 627         function getUserText() {
 628                 $this->loadLastEdit();
 629                 return $this->mUserText;
 630         }
 631
 632         function getComment() {
 633                 $this->loadLastEdit();
 634                 return $this->mComment;
 635         }
 636
 637         function getMinorEdit() {
 638                 $this->loadLastEdit();
 639                 return $this->mMinorEdit;
 640         }
 641
 642         function getContributors($limit = 0, $offset = 0) {
 643                 $fname = 'Article::getContributors';
 644
 645                 # XXX: this is expensive; cache this info somewhere.
 646
 647                 $title = $this->mTitle;
 648                 $contribs = array();
 649                 $dbr =& $this->getDB();
 650                 $oldTable = $dbr->tableName( 'old' );
 651                 $userTable = $dbr->tableName( 'user' );
 652                 $encDBkey = $dbr->addQuotes( $title->getDBkey() );
 653                 $ns = $title->getNamespace();
 654                 $user = $this->getUser();
 655
 656                 $sql = "SELECT old_user, old_user_text, user_real_name, MAX(old_timestamp) as timestamp
 657                         FROM $oldTable LEFT JOIN $userTable ON old_user = user_id
 658                         WHERE old_namespace = $user
 659                         AND old_title = $encDBkey
 660                         AND old_user != $user
 661                         GROUP BY old_user, old_user_text, user_real_name
 662                         ORDER BY timestamp DESC";
 663
 664                 if ($limit > 0) { $sql .= ' LIMIT '.$limit; }
 665                 $sql .= ' '. $this->getSelectOptions();
 666
 667                 $res = $dbr->query($sql, $fname);
 668
 669                 while ( $line = $dbr->fetchObject( $res ) ) {
 670                         $contribs[] = array($line->old_user, $line->old_user_text, $line->user_real_name);
 671                 }
 672
 673                 $dbr->freeResult($res);
 674                 return $contribs;
 675         }
 676
 677         /**
 678          * This is the default action of the script: just view the page of
 679          * the given title.
 680         */
 681         function view() {
 682                 global $wgUser, $wgOut, $wgRequest, $wgOnlySysopsCanPatrol, $wgLang;
 683                 global $wgLinkCache, $IP, $wgEnableParserCache, $wgStylePath, $wgUseRCPatrol;
 684                 global $wgEnotif;
 685                 $sk = $wgUser->getSkin();
 686
 687                 $fname = 'Article::view';
 688                 wfProfileIn( $fname );
 689                 # Get variables from query string
 690                 $oldid = $this->getOldID();
 691                 $diff = $wgRequest->getVal( 'diff' );
 692                 $rcid = $wgRequest->getVal( 'rcid' );
 693
 694                 $wgOut->setArticleFlag( true );
 695                 $wgOut->setRobotpolicy( 'index,follow' );
 696                 # If we got diff and oldid in the query, we want to see a
 697                 # diff page instead of the article.
 698
 699                 if ( !is_null( $diff ) ) {
 700                         require_once( 'DifferenceEngine.php' );
 701                         $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
 702                         $de = new DifferenceEngine( $oldid, $diff, $rcid );
 703                         $de->showDiffPage();
 704                         if( $diff == 0 ) {
 705                                 # Run view updates for current revision only
 706                                 $this->viewUpdates();
 707                         }
 708                         wfProfileOut( $fname );
 709                         return;
 710                 }
 711                 if ( empty( $oldid ) && $this->checkTouched() ) {
 712                         if( $wgOut->checkLastModified( $this->mTouched ) ){
 713                                 wfProfileOut( $fname );
 714                                 return;
 715                         } else if ( $this->tryFileCache() ) {
 716                                 # tell wgOut that output is taken care of
 717                                 $wgOut->disable();
 718                                 $this->viewUpdates();
 719                                 wfProfileOut( $fname );
 720                                 return;
 721                         }
 722                 }
 723                 # Should the parser cache be used?
 724                 if ( $wgEnableParserCache && intval($wgUser->getOption( 'stubthreshold' )) == 0 && empty( $oldid ) ) {
 725                         $pcache = true;
 726                 } else {
 727                         $pcache = false;
 728                 }
 729
 730                 $outputDone = false;
 731                 if ( $pcache ) {
 732                         if ( $wgOut->tryParserCache( $this, $wgUser ) ) {
 733                                 $outputDone = true;
 734                         }
 735                 }
 736                 if ( !$outputDone ) {
 737                         $text = $this->getContent( false ); # May change mTitle by following a redirect
 738
 739                         # Another whitelist check in case oldid or redirects are altering the title
 740                         if ( !$this->mTitle->userCanRead() ) {
 741                                 $wgOut->loginToUse();
 742                                 $wgOut->output();
 743                                 exit;
 744                         }
 745
 746
 747                         # We're looking at an old revision
 748
 749                         if ( !empty( $oldid ) ) {
 750                                 $this->setOldSubtitle( $oldid );
 751                                 $wgOut->setRobotpolicy( 'noindex,follow' );
 752                         }
 753                         if ( '' != $this->mRedirectedFrom ) {
 754                                 $sk = $wgUser->getSkin();
 755                                 $redir = $sk->makeKnownLink( $this->mRedirectedFrom, '',
 756                                   'redirect=no' );
 757                                 $s = wfMsg( 'redirectedfrom', $redir );
 758                                 $wgOut->setSubtitle( $s );
 759
 760                                 # Can't cache redirects
 761                                 $pcache = false;
 762                         }
 763
 764                         # wrap user css and user js in pre and don't parse
 765                         # XXX: use $this->mTitle->usCssJsSubpage() when php is fixed/ a workaround is found
 766                         if (
 767                                 $this->mTitle->getNamespace() == NS_USER &&
 768                                 preg_match('/\\/[\\w]+\\.(css|js)$/', $this->mTitle->getDBkey())
 769                         ) {
 770                                 $wgOut->addWikiText( wfMsg('clearyourcache'));
 771                                 $wgOut->addHTML( '<pre>'.htmlspecialchars($this->mContent)."\n</pre>" );
 772                         } else if ( $rt = Title::newFromRedirect( $text ) ) {
 773                                 # Display redirect
 774                                 $imageUrl = $wgStylePath.'/common/images/redirect.png';
 775                                 $targetUrl = $rt->escapeLocalURL();
 776                                 $titleText = htmlspecialchars( $rt->getPrefixedText() );
 777                                 $link = $sk->makeLinkObj( $rt );
 778
 779                                 $wgOut->addHTML( '<img valign="center" src="'.$imageUrl.'" alt="#REDIRECT" />' .
 780                                   '<span class="redirectText">'.$link.'</span>' );
 781
 782                         } else if ( $pcache ) {
 783                                 # Display content and save to parser cache
 784                                 $wgOut->addPrimaryWikiText( $text, $this );
 785                         } else {
 786                                 # Display content, don't attempt to save to parser cache
 787                                 $wgOut->addWikiText( $text );
 788                         }
 789                 }
 790                 $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
 791                 # If we have been passed an &rcid= parameter, we want to give the user a
 792                 # chance to mark this new article as patrolled.
 793                 if ( $wgUseRCPatrol && !is_null ( $rcid ) && $rcid != 0 && $wgUser->getID() != 0 &&
 794                      ( $wgUser->isAllowed('patrol') || !$wgOnlySysopsCanPatrol ) )
 795                 {
 796                         $wgOut->addHTML( wfMsg ( 'markaspatrolledlink',
 797                                 $sk->makeKnownLinkObj ( $this->mTitle, wfMsg ( 'markaspatrolledtext' ),
 798                                         'action=markpatrolled&rcid='.$rcid )
 799                          ) );
 800                 }
 801
 802                 # Put link titles into the link cache
 803                 $wgOut->transformBuffer();
 804
 805                 # Add link titles as META keywords
 806                 $wgOut->addMetaTags() ;
 807
 808                 $this->viewUpdates();
 809                 wfProfileOut( $fname );
 810
 811                 include_once( "UserMailer.php" );
 812                 $wgEnotif = new EmailNotification ();
 813                 $wgEnotif->Clear( $wgUser->getID(), $this->mTitle->getDBkey(), $this->mTitle->getNamespace() );
 814         }
 815
 816         /**
 817          * Theoretically we could defer these whole insert and update
 818          * functions for after display, but that's taking a big leap
 819          * of faith, and we want to be able to report database
 820          * errors at some point.
 821          * @private
 822          */
 823         function insertNewArticle( $text, $summary, $isminor, $watchthis ) {
 824                 global $wgOut, $wgUser;
 825                 global $wgUseSquid, $wgDeferredUpdateList, $wgInternalServer;
 826
 827                 $fname = 'Article::insertNewArticle';
 828
 829                 $this->mCountAdjustment = $this->isCountable( $text );
 830
 831                 $ns = $this->mTitle->getNamespace();
 832                 $ttl = $this->mTitle->getDBkey();
 833                 $text = $this->preSaveTransform( $text );
 834                 if ( $this->isRedirect( $text ) ) { $redir = 1; }
 835                 else { $redir = 0; }
 836
 837                 $now = wfTimestampNow();
 838                 $won = wfInvertTimestamp( $now );
 839                 wfSeedRandom();
 840                 $rand = wfRandom();
 841                 $dbw =& wfGetDB( DB_MASTER );
 842
 843                 $cur_id = $dbw->nextSequenceValue( 'cur_cur_id_seq' );
 844
 845                 $isminor = ( $isminor && $wgUser->getID() ) ? 1 : 0;
 846
 847                 $dbw->insert( 'cur', array(
 848                         'cur_id' => $cur_id,
 849                         'cur_namespace' => $ns,
 850                         'cur_title' => $ttl,
 851                         'cur_text' => $text,
 852                         'cur_comment' => $summary,
 853                         'cur_user' => $wgUser->getID(),
 854                         'cur_timestamp' => $dbw->timestamp($now),
 855                         'cur_minor_edit' => $isminor,
 856                         'cur_counter' => 0,
 857                         'cur_restrictions' => '',
 858                         'cur_user_text' => $wgUser->getName(),
 859                         'cur_is_redirect' => $redir,
 860                         'cur_is_new' => 1,
 861                         'cur_random' => $rand,
 862                         'cur_touched' => $dbw->timestamp($now),
 863                         'inverse_timestamp' => $won,
 864                 ), $fname );
 865
 866                 $newid = $dbw->insertId();
 867                 $this->mTitle->resetArticleID( $newid );
 868
 869                 Article::onArticleCreate( $this->mTitle );
 870                 RecentChange::notifyNew( $now, $this->mTitle, $isminor, $wgUser, $summary );
 871
 872                 if ($watchthis) {
 873                         if(!$this->mTitle->userIsWatching()) $this->watch();
 874                 } else {
 875                         if ( $this->mTitle->userIsWatching() ) {
 876                                 $this->unwatch();
 877                         }
 878                 }
 879
 880                 # The talk page isn't in the regular link tables, so we need to update manually:
 881                 $talkns = $ns ^ 1; # talk -> normal; normal -> talk
 882                 $dbw->update( 'cur', array('cur_touched' => $dbw->timestamp($now) ),
 883                         array(  'cur_namespace' => $talkns, 'cur_title' => $ttl ), $fname );
 884
 885                 # standard deferred updates
 886                 $this->editUpdates( $text, $summary, $isminor, $now );
 887
 888                 $oldid = 0; # new article
 889                 $this->showArticle( $text, wfMsg( 'newarticle' ), false, $isminor, $now, $summary, $oldid );
 890         }
 891
 892
 893         /**
 894          * Side effects: loads last edit if $edittime is NULL
 895          */
 896         function getTextOfLastEditWithSectionReplacedOrAdded($section, $text, $summary = '', $edittime = NULL) {
 897                 $fname = 'Article::getTextOfLastEditWithSectionReplacedOrAdded';
 898                 if(is_null($edittime)) {
 899                         $this->loadLastEdit();
 900                         $oldtext = $this->getContent( true );
 901                 } else {
 902                         $dbw =& wfGetDB( DB_MASTER );
 903                         $ns = $this->mTitle->getNamespace();
 904                         $title = $this->mTitle->getDBkey();
 905                         $obj = $dbw->selectRow( 'old',
 906                                 array( 'old_text','old_flags'),
 907                                 array( 'old_namespace' => $ns, 'old_title' => $title,
 908                                         'old_timestamp' => $dbw->timestamp($edittime)),
 909                                 $fname );
 910                         $oldtext = Article::getRevisionText( $obj );
 911                 }
 912                 if ($section != '') {
 913                         if($section=='new') {
 914                                 if($summary) $subject="== {$summary} ==\n\n";
 915                                 $text=$oldtext."\n\n".$subject.$text;
 916                         } else {
 917
 918                                 # strip NOWIKI etc. to avoid confusion (true-parameter causes HTML
 919                                 # comments to be stripped as well)
 920                                 $striparray=array();
 921                                 $parser=new Parser();
 922                                 $parser->mOutputType=OT_WIKI;
 923                                 $oldtext=$parser->strip($oldtext, $striparray, true);
 924
 925                                 # now that we can be sure that no pseudo-sections are in the source,
 926                                 # split it up
 927                                 # Unfortunately we can't simply do a preg_replace because that might
 928                                 # replace the wrong section, so we have to use the section counter instead
 929                                 $secs=preg_split('/(^=+.+?=+|^<h[1-6].*?' . '>.*?<\/h[1-6].*?' . '>)(?!\S)/mi',
 930                                   $oldtext,-1,PREG_SPLIT_DELIM_CAPTURE);
 931                                 $secs[$section*2]=$text."\n\n"; // replace with edited
 932
 933                                 # section 0 is top (intro) section
 934                                 if($section!=0) {
 935
 936                                         # headline of old section - we need to go through this section
 937                                         # to determine if there are any subsections that now need to
 938                                         # be erased, as the mother section has been replaced with
 939                                         # the text of all subsections.
 940                                         $headline=$secs[$section*2-1];
 941                                         preg_match( '/^(=+).+?=+|^<h([1-6]).*?' . '>.*?<\/h[1-6].*?' . '>(?!\S)/mi',$headline,$matches);
 942                                         $hlevel=$matches[1];
 943
 944                                         # determine headline level for wikimarkup headings
 945                                         if(strpos($hlevel,'=')!==false) {
 946                                                 $hlevel=strlen($hlevel);
 947                                         }
 948
 949                                         $secs[$section*2-1]=''; // erase old headline
 950                                         $count=$section+1;
 951                                         $break=false;
 952                                         while(!empty($secs[$count*2-1]) && !$break) {
 953
 954                                                 $subheadline=$secs[$count*2-1];
 955                                                 preg_match(
 956                                                  '/^(=+).+?=+|^<h([1-6]).*?' . '>.*?<\/h[1-6].*?' . '>(?!\S)/mi',$subheadline,$matches);
 957                                                 $subhlevel=$matches[1];
 958                                                 if(strpos($subhlevel,'=')!==false) {
 959                                                         $subhlevel=strlen($subhlevel);
 960                                                 }
 961                                                 if($subhlevel > $hlevel) {
 962                                                         // erase old subsections
 963                                                         $secs[$count*2-1]='';
 964                                                         $secs[$count*2]='';
 965                                                 }
 966                                                 if($subhlevel <= $hlevel) {
 967                                                         $break=true;
 968                                                 }
 969                                                 $count++;
 970
 971                                         }
 972
 973                                 }
 974                                 $text=join('',$secs);
 975                                 # reinsert the stuff that we stripped out earlier
 976                                 $text=$parser->unstrip($text,$striparray);
 977                                 $text=$parser->unstripNoWiki($text,$striparray);
 978                         }
 979
 980                 }
 981                 return $text;
 982         }
 983
 984         /**
 985          * Change an existing article. Puts the previous version back into the old table, updates RC
 986          * and all necessary caches, mostly via the deferred update array.
 987          *
 988          * It is possible to call this function from a command-line script, but note that you should
 989          * first set $wgUser, and clean up $wgDeferredUpdates after each edit.
 990          */
 991         function updateArticle( $text, $summary, $minor, $watchthis, $forceBot = false, $sectionanchor = '' ) {
 992                 global $wgOut, $wgUser;
 993                 global $wgDBtransactions, $wgMwRedir;
 994                 global $wgUseSquid, $wgInternalServer;
 995
 996                 $fname = 'Article::updateArticle';
 997                 $good = true;
 998
 999                 if ( $this->mMinorEdit ) { $me1 = 1; } else { $me1 = 0; }
1000                 if ( $minor && $wgUser->getID() ) { $me2 = 1; } else { $me2 = 0; }
1001                 if ( $this->isRedirect( $text ) ) {
1002                         # Remove all content but redirect
1003                         # This could be done by reconstructing the redirect from a title given by
1004                         # Title::newFromRedirect(), but then we wouldn't know which synonym the user
1005                         # wants to see
1006                         if ( preg_match( "/^((" . $wgMwRedir->getBaseRegex() . ')[^\\n]+)/i', $text, $m ) ) {
1007                                 $redir = 1;
1008                                 $text = $m[1] . "\n";
1009                         }
1010                 }
1011                 else { $redir = 0; }
1012
1013                 $text = $this->preSaveTransform( $text );
1014                 $dbw =& wfGetDB( DB_MASTER );
1015
1016                 # Update article, but only if changed.
1017
1018                 # It's important that we either rollback or complete, otherwise an attacker could
1019                 # overwrite cur entries by sending precisely timed user aborts. Random bored users
1020                 # could conceivably have the same effect, especially if cur is locked for long periods.
1021                 if( $wgDBtransactions ) {
1022                         $dbw->query( 'BEGIN', $fname );
1023                 } else {
1024                         $userAbort = ignore_user_abort( true );
1025                 }
1026
1027                 $oldtext = $this->getContent( true );
1028
1029                 if ( 0 != strcmp( $text, $oldtext ) ) {
1030                         $this->mCountAdjustment = $this->isCountable( $text )
1031                           - $this->isCountable( $oldtext );
1032                         $now = wfTimestampNow();
1033                         $won = wfInvertTimestamp( $now );
1034
1035                         # First update the cur row
1036                         $dbw->update( 'cur',
1037                                 array( /* SET */
1038                                         'cur_text' => $text,
1039                                         'cur_comment' => $summary,
1040                                         'cur_minor_edit' => $me2,
1041                                         'cur_user' => $wgUser->getID(),
1042                                         'cur_timestamp' => $dbw->timestamp($now),
1043                                         'cur_user_text' => $wgUser->getName(),
1044                                         'cur_is_redirect' => $redir,
1045                                         'cur_is_new' => 0,
1046                                         'cur_touched' => $dbw->timestamp($now),
1047                                         'inverse_timestamp' => $won
1048                                 ), array( /* WHERE */
1049                                         'cur_id' => $this->getID(),
1050                                         'cur_timestamp' => $dbw->timestamp($this->getTimestamp())
1051                                 ), $fname
1052                         );
1053
1054                         if( $dbw->affectedRows() == 0 ) {
1055                                 /* Belated edit conflict! Run away!! */
1056                                 $good = false;
1057                         } else {
1058                                 # Now insert the previous revision into old
1059
1060                                 # This overwrites $oldtext if revision compression is on
1061                                 $flags = Article::compressRevisionText( $oldtext );
1062
1063                                 $dbw->insert( 'old',
1064                                         array(
1065                                                 'old_id' => $dbw->nextSequenceValue( 'old_old_id_seq' ),
1066                                                 'old_namespace' => $this->mTitle->getNamespace(),
1067                                                 'old_title' => $this->mTitle->getDBkey(),
1068                                                 'old_text' => $oldtext,
1069                                                 'old_comment' => $this->getComment(),
1070                                                 'old_user' => $this->getUser(),
1071                                                 'old_user_text' => $this->getUserText(),
1072                                                 'old_timestamp' => $dbw->timestamp($this->getTimestamp()),
1073                                                 'old_minor_edit' => $me1,
1074                                                 'inverse_timestamp' => wfInvertTimestamp( $this->getTimestamp() ),
1075                                                 'old_flags' => $flags,
1076                                         ), $fname
1077                                 );
1078
1079                                 $oldid = $dbw->insertId();
1080
1081                                 $bot = (int)($wgUser->isBot() || $forceBot);
1082                                 RecentChange::notifyEdit( $now, $this->mTitle, $me2, $wgUser, $summary,
1083                                         $oldid, $this->getTimestamp(), $bot );
1084                                 Article::onArticleEdit( $this->mTitle );
1085                         }
1086                 }
1087
1088                 if( $wgDBtransactions ) {
1089                         $dbw->query( 'COMMIT', $fname );
1090                 } else {
1091                         ignore_user_abort( $userAbort );
1092                 }
1093
1094                 if ( $good ) {
1095                 if ($watchthis) {
1096                         if (!$this->mTitle->userIsWatching()) $this->watch();
1097                 } else {
1098                         if ( $this->mTitle->userIsWatching() ) {
1099                                 $this->unwatch();
1100                         }
1101                 }
1102                 # standard deferred updates
1103                 $this->editUpdates( $text, $summary, $minor, $now );
1104
1105
1106                 $urls = array();
1107                 # Template namespace
1108                 # Purge all articles linking here
1109                 if ( $this->mTitle->getNamespace() == NS_TEMPLATE) {
1110                         $titles = $this->mTitle->getLinksTo();
1111                         Title::touchArray( $titles );
1112                         if ( $wgUseSquid ) {
1113                                         foreach ( $titles as $title ) {
1114                                                 $urls[] = $title->getInternalURL();
1115                                         }
1116                         }
1117                 }
1118
1119                 # Squid updates
1120                 if ( $wgUseSquid ) {
1121                         $urls = array_merge( $urls, $this->mTitle->getSquidURLs() );
1122                         $u = new SquidUpdate( $urls );
1123                         $u->doUpdate();
1124                 }
1125
1126                 $this->showArticle( $text, wfMsg( 'updated' ), $sectionanchor, $me2, $now, $summary, $oldid );
1127                 }
1128                 return $good;
1129         }
1130
1131         /**
1132          * After we've either updated or inserted the article, update
1133          * the link tables and redirect to the new page.
1134          */
1135         function showArticle( $text, $subtitle , $sectionanchor = '', $me2, $now, $summary, $oldid ) {
1136                 global $wgOut, $wgUser, $wgLinkCache, $wgEnotif;
1137
1138                 $wgLinkCache = new LinkCache();
1139                 # Select for update
1140                 $wgLinkCache->forUpdate( true );
1141
1142                 # Get old version of link table to allow incremental link updates
1143                 $wgLinkCache->preFill( $this->mTitle );
1144                 $wgLinkCache->clear();
1145
1146                 # Parse the text and replace links with placeholders
1147                 $wgOut = new OutputPage();
1148                 $wgOut->addWikiText( $text );
1149
1150                 # Look up the links in the DB and add them to the link cache
1151                 $wgOut->transformBuffer( RLH_FOR_UPDATE );
1152
1153                 if( $this->isRedirect( $text ) )
1154                         $r = 'redirect=no';
1155                 else
1156                         $r = '';
1157                 $wgOut->redirect( $this->mTitle->getFullURL( $r ).$sectionanchor );
1158
1159                 # this call would better fit into RecentChange::notifyEdit and RecentChange::notifyNew .
1160                 # this will be improved later (to-do)
1161
1162                 include_once( "UserMailer.php" );
1163                 $wgEnotif = new EmailNotification ();
1164                 $wgEnotif->NotifyOnPageChange( $wgUser->getID(), $this->mTitle->getDBkey(), $this->mTitle->getNamespace(),$now, $summary, $me2, $oldid );
1165         }
1166
1167         /**
1168          * Validate article
1169          * @todo document this function a bit more
1170          */
1171         function validate () {
1172                 global $wgOut, $wgUseValidation;
1173                 if( $wgUseValidation ) {
1174                         require_once ( 'SpecialValidate.php' ) ;
1175                         $wgOut->setPagetitle( wfMsg( 'validate' ) . ': ' . $this->mTitle->getPrefixedText() );
1176                         $wgOut->setRobotpolicy( 'noindex,follow' );
1177                         if( $this->mTitle->getNamespace() != 0 ) {
1178                                 $wgOut->addHTML( wfMsg( 'val_validate_article_namespace_only' ) );
1179                                 return;
1180                         }
1181                         $v = new Validation;
1182                         $v->validate_form( $this->mTitle->getDBkey() );
1183                 } else {
1184                         $wgOut->errorpage( 'nosuchaction', 'nosuchactiontext' );
1185                 }
1186         }
1187
1188         /**
1189          * Mark this particular edit as patrolled
1190          */
1191         function markpatrolled() {
1192                 global $wgOut, $wgRequest, $wgOnlySysopsCanPatrol, $wgUseRCPatrol, $wgUser;
1193                 $wgOut->setRobotpolicy( 'noindex,follow' );
1194
1195                 if ( !$wgUseRCPatrol )
1196                 {
1197                         $wgOut->errorpage( 'rcpatroldisabled', 'rcpatroldisabledtext' );
1198                         return;
1199                 }
1200                 if ( $wgUser->getID() == 0 )
1201                 {
1202                         $wgOut->loginToUse();
1203                         return;
1204                 }
1205                 if ( $wgOnlySysopsCanPatrol && !$wgUser->isAllowed('patrol') )
1206                 {
1207                         $wgOut->sysopRequired();
1208                         return;
1209                 }
1210                 $rcid = $wgRequest->getVal( 'rcid' );
1211                 if ( !is_null ( $rcid ) )
1212                 {
1213                         RecentChange::markPatrolled( $rcid );
1214                         $wgOut->setPagetitle( wfMsg( 'markedaspatrolled' ) );
1215                         $wgOut->addWikiText( wfMsg( 'markedaspatrolledtext' ) );
1216
1217                         $rcTitle = Title::makeTitle( NS_SPECIAL, 'Recentchanges' );
1218                         $wgOut->returnToMain( false, $rcTitle->getPrefixedText() );
1219                 }
1220                 else
1221                 {
1222                         $wgOut->errorpage( 'markedaspatrollederror', 'markedaspatrollederrortext' );
1223                 }
1224         }
1225
1226
1227         /**
1228          * Add this page to $wgUser's watchlist
1229          */
1230
1231         function watch() {
1232
1233                 global $wgUser, $wgOut;
1234
1235                 if ( 0 == $wgUser->getID() ) {
1236                         $wgOut->errorpage( 'watchnologin', 'watchnologintext' );
1237                         return;
1238                 }
1239                 if ( wfReadOnly() ) {
1240                         $wgOut->readOnlyPage();
1241                         return;
1242                 }
1243
1244                 if (wfRunHooks('WatchArticle', $wgUser, $this)) {
1245
1246                         $wgUser->addWatch( $this->mTitle );
1247                         $wgUser->saveSettings();
1248
1249                         wfRunHooks('WatchArticleComplete', $wgUser, $this);
1250
1251                         $wgOut->setPagetitle( wfMsg( 'addedwatch' ) );
1252                         $wgOut->setRobotpolicy( 'noindex,follow' );
1253
1254                         $link = $this->mTitle->getPrefixedText();
1255                         $text = wfMsg( 'addedwatchtext', $link );
1256                         $wgOut->addWikiText( $text );
1257                 }
1258
1259                 $wgOut->returnToMain( true, $this->mTitle->getPrefixedText() );
1260         }
1261
1262         /**
1263          * Stop watching a page
1264          */
1265
1266         function unwatch() {
1267
1268                 global $wgUser, $wgOut;
1269
1270                 if ( 0 == $wgUser->getID() ) {
1271                         $wgOut->errorpage( 'watchnologin', 'watchnologintext' );
1272                         return;
1273                 }
1274                 if ( wfReadOnly() ) {
1275                         $wgOut->readOnlyPage();
1276                         return;
1277                 }
1278
1279                 if (wfRunHooks('UnwatchArticle', $wgUser, $this)) {
1280
1281                         $wgUser->removeWatch( $this->mTitle );
1282                         $wgUser->saveSettings();
1283
1284                         wfRunHooks('UnwatchArticleComplete', $wgUser, $this);
1285
1286                         $wgOut->setPagetitle( wfMsg( 'removedwatch' ) );
1287                         $wgOut->setRobotpolicy( 'noindex,follow' );
1288
1289                         $link = $this->mTitle->getPrefixedText();
1290                         $text = wfMsg( 'removedwatchtext', $link );
1291                         $wgOut->addWikiText( $text );
1292                 }
1293
1294                 $wgOut->returnToMain( true, $this->mTitle->getPrefixedText() );
1295         }
1296
1297         /**
1298          * protect a page
1299          */
1300         function protect( $limit = 'sysop' ) {
1301                 global $wgUser, $wgOut, $wgRequest;
1302
1303                 if ( ! $wgUser->isAllowed('protect') ) {
1304                         $wgOut->sysopRequired();
1305                         return;
1306                 }
1307                 if ( wfReadOnly() ) {
1308                         $wgOut->readOnlyPage();
1309                         return;
1310                 }
1311                 $id = $this->mTitle->getArticleID();
1312                 if ( 0 == $id ) {
1313                         $wgOut->fatalError( wfMsg( 'badarticleerror' ) );
1314                         return;
1315                 }
1316
1317                 $confirm = $wgRequest->getBool( 'wpConfirmProtect' ) && $wgRequest->wasPosted();
1318                 $moveonly = $wgRequest->getBool( 'wpMoveOnly' );
1319                 $reason = $wgRequest->getText( 'wpReasonProtect' );
1320
1321                 if ( $confirm ) {
1322
1323                         $restrictions = "move=" . $limit;
1324                         if( !$moveonly ) {
1325                                 $restrictions .= ":edit=" . $limit;
1326                         }
1327                         if (wfRunHooks('ArticleProtect', $this, $wgUser, $limit == 'sysop', $reason, $moveonly)) {
1328
1329                                 $dbw =& wfGetDB( DB_MASTER );
1330                                 $dbw->update( 'cur',
1331                                                           array( /* SET */
1332                                                                          'cur_touched' => $dbw->timestamp(),
1333                                                                          'cur_restrictions' => $restrictions
1334                                                                          ), array( /* WHERE */
1335                                                                                            'cur_id' => $id
1336                                                                                            ), 'Article::protect'
1337                                                           );
1338
1339                                 wfRunHooks('ArticleProtectComplete', $this, $wgUser, $limit == 'sysop', $reason, $moveonly);
1340
1341                                 $log = new LogPage( 'protect' );
1342                                 if ( $limit === '' ) {
1343                                         $log->addEntry( 'unprotect', $this->mTitle, $reason );
1344                                 } else {
1345                                         $log->addEntry( 'protect', $this->mTitle, $reason );
1346                                 }
1347                                 $wgOut->redirect( $this->mTitle->getFullURL() );
1348                         }
1349                         return;
1350                 } else {
1351                         $reason = htmlspecialchars( wfMsg( 'protectreason' ) );
1352                         return $this->confirmProtect( '', $reason, $limit );
1353                 }
1354         }
1355
1356         /**
1357          * Output protection confirmation dialog
1358          */
1359         function confirmProtect( $par, $reason, $limit = 'sysop'  ) {
1360                 global $wgOut;
1361
1362                 wfDebug( "Article::confirmProtect\n" );
1363
1364                 $sub = htmlspecialchars( $this->mTitle->getPrefixedText() );
1365                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
1366
1367                 $check = '';
1368                 $protcom = '';
1369                 $moveonly = '';
1370
1371                 if ( $limit === '' ) {
1372                         $wgOut->setPageTitle( wfMsg( 'confirmunprotect' ) );
1373                         $wgOut->setSubtitle( wfMsg( 'unprotectsub', $sub ) );
1374                         $wgOut->addWikiText( wfMsg( 'confirmunprotecttext' ) );
1375                         $check = htmlspecialchars( wfMsg( 'confirmunprotect' ) );
1376                         $protcom = htmlspecialchars( wfMsg( 'unprotectcomment' ) );
1377                         $formaction = $this->mTitle->escapeLocalURL( 'action=unprotect' . $par );
1378                 } else {
1379                         $wgOut->setPageTitle( wfMsg( 'confirmprotect' ) );
1380                         $wgOut->setSubtitle( wfMsg( 'protectsub', $sub ) );
1381                         $wgOut->addWikiText( wfMsg( 'confirmprotecttext' ) );
1382                         $check = htmlspecialchars( wfMsg( 'confirmprotect' ) );
1383                         $moveonly = htmlspecialchars( wfMsg( 'protectmoveonly' ) );
1384                         $protcom = htmlspecialchars( wfMsg( 'protectcomment' ) );
1385                         $formaction = $this->mTitle->escapeLocalURL( 'action=protect' . $par );
1386                 }
1387
1388                 $confirm = htmlspecialchars( wfMsg( 'confirm' ) );
1389
1390                 $wgOut->addHTML( "
1391 <form id='protectconfirm' method='post' action=\"{$formaction}\">
1392         <table border='0'>
1393                 <tr>
1394                         <td align='right'>
1395                                 <label for='wpReasonProtect'>{$protcom}:</label>
1396                         </td>
1397                         <td align='left'>
1398                                 <input type='text' size='60' name='wpReasonProtect' id='wpReasonProtect' value=\"" . htmlspecialchars( $reason ) . "\" />
1399                         </td>
1400                 </tr>
1401                 <tr>
1402                         <td>&nbsp;</td>
1403                 </tr>
1404                 <tr>
1405                         <td align='right'>
1406                                 <input type='checkbox' name='wpConfirmProtect' value='1' id='wpConfirmProtect' />
1407                         </td>
1408                         <td>
1409                                 <label for='wpConfirmProtect'>{$check}</label>
1410                         </td>
1411                 </tr> " );
1412                 if($moveonly != '') {
1413                         $wgOut->AddHTML( "
1414                 <tr>
1415                         <td align='right'>
1416                                 <input type='checkbox' name='wpMoveOnly' value='1' id='wpMoveOnly' />
1417                         </td>
1418                         <td>
1419                                 <label for='wpMoveOnly'>{$moveonly}</label>
1420                         </td>
1421                 </tr> " );
1422                 }
1423                 $wgOut->addHTML( "
1424                 <tr>
1425                         <td>&nbsp;</td>
1426                         <td>
1427                                 <input type='submit' name='wpConfirmProtectB' value=\"{$confirm}\" />
1428                         </td>
1429                 </tr>
1430         </table>
1431 </form>\n" );
1432
1433                 $wgOut->returnToMain( false );
1434         }
1435
1436         /**
1437          * Unprotect the pages
1438          */
1439         function unprotect() {
1440                 return $this->protect( '' );
1441         }
1442
1443         /*
1444          * UI entry point for page deletion
1445          */
1446         function delete() {
1447                 global $wgUser, $wgOut, $wgMessageCache, $wgRequest;
1448                 $fname = 'Article::delete';
1449                 $confirm = $wgRequest->getBool( 'wpConfirm' ) && $wgRequest->wasPosted();
1450                 $reason = $wgRequest->getText( 'wpReason' );
1451
1452                 # This code desperately needs to be totally rewritten
1453
1454                 # Check permissions
1455                 if ( ( ! $wgUser->isAllowed('delete') ) ) {
1456                         $wgOut->sysopRequired();
1457                         return;
1458                 }
1459                 if ( wfReadOnly() ) {
1460                         $wgOut->readOnlyPage();
1461                         return;
1462                 }
1463
1464                 # Better double-check that it hasn't been deleted yet!
1465                 $wgOut->setPagetitle( wfMsg( 'confirmdelete' ) );
1466                 if ( ( '' == trim( $this->mTitle->getText() ) )
1467                   or ( $this->mTitle->getArticleId() == 0 ) ) {
1468                         $wgOut->fatalError( wfMsg( 'cannotdelete' ) );
1469                         return;
1470                 }
1471
1472                 if ( $confirm ) {
1473                         $this->doDelete( $reason );
1474                         return;
1475                 }
1476
1477                 # determine whether this page has earlier revisions
1478                 # and insert a warning if it does
1479                 # we select the text because it might be useful below
1480                 $dbr =& $this->getDB();
1481                 $ns = $this->mTitle->getNamespace();
1482                 $title = $this->mTitle->getDBkey();
1483                 $old = $dbr->selectRow( 'old',
1484                         array( 'old_text', 'old_flags' ),
1485                         array(
1486                                 'old_namespace' => $ns,
1487                                 'old_title' => $title,
1488                         ), $fname, $this->getSelectOptions( array( 'ORDER BY' => 'inverse_timestamp' ) )
1489                 );
1490
1491                 if( $old !== false && !$confirm ) {
1492                         $skin=$wgUser->getSkin();
1493                         $wgOut->addHTML('<b>'.wfMsg('historywarning'));
1494                         $wgOut->addHTML( $skin->historyLink() .'</b>');
1495                 }
1496
1497                 # Fetch cur_text
1498                 $s = $dbr->selectRow( 'cur',
1499                         array( 'cur_text' ),
1500                         array(
1501                                 'cur_namespace' => $ns,
1502                                 'cur_title' => $title,
1503                         ), $fname, $this->getSelectOptions()
1504                 );
1505
1506                 if( $s !== false ) {
1507                         # if this is a mini-text, we can paste part of it into the deletion reason
1508
1509                         #if this is empty, an earlier revision may contain "useful" text
1510                         $blanked = false;
1511                         if($s->cur_text != '') {
1512                                 $text=$s->cur_text;
1513                         } else {
1514                                 if($old) {
1515                                         $text = Article::getRevisionText( $old );
1516                                         $blanked = true;
1517                                 }
1518
1519                         }
1520
1521                         $length=strlen($text);
1522
1523                         # this should not happen, since it is not possible to store an empty, new
1524                         # page. Let's insert a standard text in case it does, though
1525                         if($length == 0 && $reason === '') {
1526                                 $reason = wfMsg('exblank');
1527                         }
1528
1529                         if($length < 500 && $reason === '') {
1530
1531                                 # comment field=255, let's grep the first 150 to have some user
1532                                 # space left
1533                                 $text=substr($text,0,150);
1534                                 # let's strip out newlines and HTML tags
1535                                 $text=preg_replace('/\"/',"'",$text);
1536                                 $text=preg_replace('/\</','&lt;',$text);
1537                                 $text=preg_replace('/\>/','&gt;',$text);
1538                                 $text=preg_replace("/[\n\r]/",'',$text);
1539                                 if(!$blanked) {
1540                                         $reason=wfMsg('excontent'). " '".$text;
1541                                 } else {
1542                                         $reason=wfMsg('exbeforeblank') . " '".$text;
1543                                 }
1544                                 if($length>150) { $reason .= '...'; } # we've only pasted part of the text
1545                                 $reason.="'";
1546                         }
1547                 }
1548
1549                 return $this->confirmDelete( '', $reason );
1550         }
1551
1552         /**
1553          * Output deletion confirmation dialog
1554          */
1555         function confirmDelete( $par, $reason ) {
1556                 global $wgOut;
1557
1558                 wfDebug( "Article::confirmDelete\n" );
1559
1560                 $sub = htmlspecialchars( $this->mTitle->getPrefixedText() );
1561                 $wgOut->setSubtitle( wfMsg( 'deletesub', $sub ) );
1562                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
1563                 $wgOut->addWikiText( wfMsg( 'confirmdeletetext' ) );
1564
1565                 $formaction = $this->mTitle->escapeLocalURL( 'action=delete' . $par );
1566
1567                 $confirm = htmlspecialchars( wfMsg( 'confirm' ) );
1568                 $check = htmlspecialchars( wfMsg( 'confirmcheck' ) );
1569                 $delcom = htmlspecialchars( wfMsg( 'deletecomment' ) );
1570
1571                 $wgOut->addHTML( "
1572 <form id='deleteconfirm' method='post' action=\"{$formaction}\">
1573         <table border='0'>
1574                 <tr>
1575                         <td align='right'>
1576                                 <label for='wpReason'>{$delcom}:</label>
1577                         </td>
1578                         <td align='left'>
1579                                 <input type='text' size='60' name='wpReason' id='wpReason' value=\"" . htmlspecialchars( $reason ) . "\" />
1580                         </td>
1581                 </tr>
1582                 <tr>
1583                         <td>&nbsp;</td>
1584                 </tr>
1585                 <tr>
1586                         <td align='right'>
1587                                 <input type='checkbox' name='wpConfirm' value='1' id='wpConfirm' />
1588                         </td>
1589                         <td>
1590                                 <label for='wpConfirm'>{$check}</label>
1591                         </td>
1592                 </tr>
1593                 <tr>
1594                         <td>&nbsp;</td>
1595                         <td>
1596                                 <input type='submit' name='wpConfirmB' value=\"{$confirm}\" />
1597                         </td>
1598                 </tr>
1599         </table>
1600 </form>\n" );
1601
1602                 $wgOut->returnToMain( false );
1603         }
1604
1605
1606         /**
1607          * Perform a deletion and output success or failure messages
1608          */
1609         function doDelete( $reason ) {
1610                 global $wgOut, $wgUser, $wgContLang;
1611                 $fname = 'Article::doDelete';
1612                 wfDebug( $fname."\n" );
1613
1614                 if (wfRunHooks('ArticleDelete', $this, $wgUser, $reason)) {
1615                         if ( $this->doDeleteArticle( $reason ) ) {
1616                                 $deleted = $this->mTitle->getPrefixedText();
1617
1618                                 $wgOut->setPagetitle( wfMsg( 'actioncomplete' ) );
1619                                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
1620
1621                                 $sk = $wgUser->getSkin();
1622                                 $loglink = $sk->makeKnownLink( $wgContLang->getNsText( NS_PROJECT ) .
1623                                                                                            ':' . wfMsgForContent( 'dellogpage' ),
1624                                                                                            wfMsg( 'deletionlog' ) );
1625
1626                                 $text = wfMsg( 'deletedtext', $deleted, $loglink );
1627
1628                                 $wgOut->addHTML( '<p>' . $text . "</p>\n" );
1629                                 $wgOut->returnToMain( false );
1630                                 wfRunHooks('ArticleDeleteComplete', $this, $wgUser, $reason);
1631                         } else {
1632                                 $wgOut->fatalError( wfMsg( 'cannotdelete' ) );
1633                         }
1634                 }
1635         }
1636
1637         /**
1638          * Back-end article deletion
1639          * Deletes the article with database consistency, writes logs, purges caches
1640          * Returns success
1641          */
1642         function doDeleteArticle( $reason ) {
1643                 global $wgUser;
1644                 global  $wgUseSquid, $wgDeferredUpdateList, $wgInternalServer;
1645
1646                 $fname = 'Article::doDeleteArticle';
1647                 wfDebug( $fname."\n" );
1648
1649                 $dbw =& wfGetDB( DB_MASTER );
1650                 $ns = $this->mTitle->getNamespace();
1651                 $t = $this->mTitle->getDBkey();
1652                 $id = $this->mTitle->getArticleID();
1653
1654                 if ( $t == '' || $id == 0 ) {
1655                         return false;
1656                 }
1657
1658                 $u = new SiteStatsUpdate( 0, 1, -$this->isCountable( $this->getContent( true ) ) );
1659                 array_push( $wgDeferredUpdateList, $u );
1660
1661                 $linksTo = $this->mTitle->getLinksTo();
1662
1663                 # Squid purging
1664                 if ( $wgUseSquid ) {
1665                         $urls = array(
1666                                 $this->mTitle->getInternalURL(),
1667                                 $this->mTitle->getInternalURL( 'history' )
1668                         );
1669                         foreach ( $linksTo as $linkTo ) {
1670                                 $urls[] = $linkTo->getInternalURL();
1671                         }
1672
1673                         $u = new SquidUpdate( $urls );
1674                         array_push( $wgDeferredUpdateList, $u );
1675
1676                 }
1677
1678                 # Client and file cache invalidation
1679                 Title::touchArray( $linksTo );
1680
1681                 # Move article and history to the "archive" table
1682                 $archiveTable = $dbw->tableName( 'archive' );
1683                 $oldTable = $dbw->tableName( 'old' );
1684                 $curTable = $dbw->tableName( 'cur' );
1685                 $recentchangesTable = $dbw->tableName( 'recentchanges' );
1686                 $linksTable = $dbw->tableName( 'links' );
1687                 $brokenlinksTable = $dbw->tableName( 'brokenlinks' );
1688
1689                 $dbw->insertSelect( 'archive', 'cur',
1690                         array(
1691                                 'ar_namespace' => 'cur_namespace',
1692                                 'ar_title' => 'cur_title',
1693                                 'ar_text' => 'cur_text',
1694                                 'ar_comment' => 'cur_comment',
1695                                 'ar_user' => 'cur_user',
1696                                 'ar_user_text' => 'cur_user_text',
1697                                 'ar_timestamp' => 'cur_timestamp',
1698                                 'ar_minor_edit' => 'cur_minor_edit',
1699                                 'ar_flags' => 0,
1700                         ), array(
1701                                 'cur_namespace' => $ns,
1702                                 'cur_title' => $t,
1703                         ), $fname
1704                 );
1705
1706                 $dbw->insertSelect( 'archive', 'old',
1707                         array(
1708                                 'ar_namespace' => 'old_namespace',
1709                                 'ar_title' => 'old_title',
1710                                 'ar_text' => 'old_text',
1711                                 'ar_comment' => 'old_comment',
1712                                 'ar_user' => 'old_user',
1713                                 'ar_user_text' => 'old_user_text',
1714                                 'ar_timestamp' => 'old_timestamp',
1715                                 'ar_minor_edit' => 'old_minor_edit',
1716                                 'ar_flags' => 'old_flags'
1717                         ), array(
1718                                 'old_namespace' => $ns,
1719                                 'old_title' => $t,
1720                         ), $fname
1721                 );
1722
1723                 # Now that it's safely backed up, delete it
1724
1725                 $dbw->delete( 'cur', array( 'cur_namespace' => $ns, 'cur_title' => $t ), $fname );
1726                 $dbw->delete( 'old', array( 'old_namespace' => $ns, 'old_title' => $t ), $fname );
1727                 $dbw->delete( 'recentchanges', array( 'rc_namespace' => $ns, 'rc_title' => $t ), $fname );
1728
1729                 # Finally, clean up the link tables
1730                 $t = $this->mTitle->getPrefixedDBkey();
1731
1732                 Article::onArticleDelete( $this->mTitle );
1733
1734                 # Insert broken links
1735                 $brokenLinks = array();
1736                 foreach ( $linksTo as $titleObj ) {
1737                         # Get article ID. Efficient because it was loaded into the cache by getLinksTo().
1738                         $linkID = $titleObj->getArticleID();
1739                         $brokenLinks[] = array( 'bl_from' => $linkID, 'bl_to' => $t );
1740                 }
1741                 $dbw->insert( 'brokenlinks', $brokenLinks, $fname, 'IGNORE' );
1742
1743                 # Delete live links
1744                 $dbw->delete( 'links', array( 'l_to' => $id ) );
1745                 $dbw->delete( 'links', array( 'l_from' => $id ) );
1746                 $dbw->delete( 'imagelinks', array( 'il_from' => $id ) );
1747                 $dbw->delete( 'brokenlinks', array( 'bl_from' => $id ) );
1748                 $dbw->delete( 'categorylinks', array( 'cl_from' => $id ) );
1749
1750                 # Log the deletion
1751                 $log = new LogPage( 'delete' );
1752                 $log->addEntry( 'delete', $this->mTitle, $reason );
1753
1754                 # Clear the cached article id so the interface doesn't act like we exist
1755                 $this->mTitle->resetArticleID( 0 );
1756                 $this->mTitle->mArticleID = 0;
1757                 return true;
1758         }
1759
1760         /**
1761          * Revert a modification
1762          */
1763         function rollback() {
1764                 global $wgUser, $wgOut, $wgRequest;
1765                 $fname = 'Article::rollback';
1766
1767                 if ( ! $wgUser->isAllowed('rollback') ) {
1768                         $wgOut->sysopRequired();
1769                         return;
1770                 }
1771                 if ( wfReadOnly() ) {
1772                         $wgOut->readOnlyPage( $this->getContent( true ) );
1773                         return;
1774                 }
1775                 $dbw =& wfGetDB( DB_MASTER );
1776
1777                 # Enhanced rollback, marks edits rc_bot=1
1778                 $bot = $wgRequest->getBool( 'bot' );
1779
1780                 # Replace all this user's current edits with the next one down
1781                 $tt = $this->mTitle->getDBKey();
1782                 $n = $this->mTitle->getNamespace();
1783
1784                 # Get the last editor, lock table exclusively
1785                 $s = $dbw->selectRow( 'cur',
1786                         array( 'cur_id','cur_user','cur_user_text','cur_comment' ),
1787                         array( 'cur_title' => $tt, 'cur_namespace' => $n ),
1788                         $fname, 'FOR UPDATE'
1789                 );
1790                 if( $s === false ) {
1791                         # Something wrong
1792                         $wgOut->addHTML( wfMsg( 'notanarticle' ) );
1793                         return;
1794                 }
1795                 $ut = $dbw->strencode( $s->cur_user_text );
1796                 $uid = $s->cur_user;
1797                 $pid = $s->cur_id;
1798
1799                 $from = str_replace( '_', ' ', $wgRequest->getVal( 'from' ) );
1800                 if( $from != $s->cur_user_text ) {
1801                         $wgOut->setPageTitle(wfmsg('rollbackfailed'));
1802                         $wgOut->addWikiText( wfMsg( 'alreadyrolled',
1803                                 htmlspecialchars( $this->mTitle->getPrefixedText()),
1804                                 htmlspecialchars( $from ),
1805                                 htmlspecialchars( $s->cur_user_text ) ) );
1806                         if($s->cur_comment != '') {
1807                                 $wgOut->addHTML(
1808                                         wfMsg('editcomment',
1809                                         htmlspecialchars( $s->cur_comment ) ) );
1810                         }
1811                         return;
1812                 }
1813
1814                 # Get the last edit not by this guy
1815                 $s = $dbw->selectRow( 'old',
1816                         array( 'old_text','old_user','old_user_text','old_timestamp','old_flags' ),
1817                         array(
1818                                 'old_namespace' => $n,
1819                                 'old_title' => $tt,
1820                                 "old_user <> {$uid} OR old_user_text <> '{$ut}'"
1821                         ), $fname, array( 'FOR UPDATE', 'USE INDEX' => 'name_title_timestamp' )
1822                 );
1823                 if( $s === false ) {
1824                         # Something wrong
1825                         $wgOut->setPageTitle(wfMsg('rollbackfailed'));
1826                         $wgOut->addHTML( wfMsg( 'cantrollback' ) );
1827                         return;
1828                 }
1829
1830                 if ( $bot ) {
1831                         # Mark all reverted edits as bot
1832                         $dbw->update( 'recentchanges',
1833                                 array( /* SET */
1834                                         'rc_bot' => 1
1835                                 ), array( /* WHERE */
1836                                         'rc_user' => $uid,
1837                                         "rc_timestamp > '{$s->old_timestamp}'",
1838                                 ), $fname
1839                         );
1840                 }
1841
1842                 # Save it!
1843                 $newcomment = wfMsg( 'revertpage', $s->old_user_text, $from );
1844                 $wgOut->setPagetitle( wfMsg( 'actioncomplete' ) );
1845                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
1846                 $wgOut->addHTML( '<h2>' . htmlspecialchars( $newcomment ) . "</h2>\n<hr />\n" );
1847                 $this->updateArticle( Article::getRevisionText( $s ), $newcomment, 1, $this->mTitle->userIsWatching(), $bot );
1848                 Article::onArticleEdit( $this->mTitle );
1849                 $wgOut->returnToMain( false );
1850         }
1851
1852
1853         /**
1854          * Do standard deferred updates after page view
1855          * @private
1856          */
1857         function viewUpdates() {
1858                 global $wgDeferredUpdateList;
1859
1860                 if ( 0 != $this->getID() ) {
1861                         global $wgDisableCounters;
1862                         if( !$wgDisableCounters ) {
1863                                 Article::incViewCount( $this->getID() );
1864                                 $u = new SiteStatsUpdate( 1, 0, 0 );
1865                                 array_push( $wgDeferredUpdateList, $u );
1866                         }
1867                 }
1868
1869                 # Update newtalk status if user is reading their own
1870                 # talk page
1871
1872                 global $wgUser;
1873                 if ($this->mTitle->getNamespace() == NS_USER_TALK &&
1874                         $this->mTitle->getText() == $wgUser->getName()) {
1875                         require_once( 'UserTalkUpdate.php' );
1876                         $u = new UserTalkUpdate( 0, $this->mTitle->getNamespace(), $this->mTitle->getDBkey(), false, false, false );
1877                 }
1878         }
1879
1880         /**
1881          * Do standard deferred updates after page edit.
1882          * Every 1000th edit, prune the recent changes table.
1883          * @private
1884          * @param string $text
1885          */
1886         function editUpdates( $text, $summary, $minoredit, $timestamp_of_pagechange) {
1887                 global $wgDeferredUpdateList, $wgDBname, $wgMemc;
1888                 global $wgMessageCache, $wgUser;
1889
1890                 wfSeedRandom();
1891                 if ( 0 == mt_rand( 0, 999 ) ) {
1892                         $dbw =& wfGetDB( DB_MASTER );
1893                         $cutoff = $dbw->timestamp( time() - ( 7 * 86400 ) );
1894                         $sql = "DELETE FROM recentchanges WHERE rc_timestamp < '{$cutoff}'";
1895                         $dbw->query( $sql );
1896                 }
1897                 $id = $this->getID();
1898                 $title = $this->mTitle->getPrefixedDBkey();
1899                 $shortTitle = $this->mTitle->getDBkey();
1900
1901                 $adj = $this->mCountAdjustment;
1902
1903                 if ( 0 != $id ) {
1904                         $u = new LinksUpdate( $id, $title );
1905                         array_push( $wgDeferredUpdateList, $u );
1906                         $u = new SiteStatsUpdate( 0, 1, $adj );
1907                         array_push( $wgDeferredUpdateList, $u );
1908                         $u = new SearchUpdate( $id, $title, $text );
1909                         array_push( $wgDeferredUpdateList, $u );
1910
1911                         # If this is another user's talk page,
1912                         # create a watchlist entry for this page
1913
1914                         if ($this->mTitle->getNamespace() == NS_USER_TALK &&
1915                                 $shortTitle != $wgUser->getName()) {
1916                                 require_once( 'UserTalkUpdate.php' );
1917                                 $u = new UserTalkUpdate( 1, $this->mTitle->getNamespace(), $shortTitle, $summary, $minoredit, $timestamp_of_pagechange);
1918                         }
1919
1920                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
1921                                 $wgMessageCache->replace( $shortTitle, $text );
1922                         }
1923                 }
1924         }
1925
1926         /**
1927          * @todo document this function
1928          * @private
1929          * @param string $oldid         Revision ID of this article revision
1930          */
1931         function setOldSubtitle( $oldid=0 ) {
1932                 global $wgLang, $wgOut, $wgUser;
1933
1934                 $td = $wgLang->timeanddate( $this->mTimestamp, true );
1935                 $sk = $wgUser->getSkin();
1936                 $lnk = $sk->makeKnownLinkObj ( $this->mTitle, wfMsg( 'currentrevisionlink' ) );
1937                 $prevlink = $sk->makeKnownLinkObj( $this->mTitle, wfMsg( 'previousrevision' ), 'direction=prev&oldid='.$oldid );
1938                 $nextlink = $sk->makeKnownLinkObj( $this->mTitle, wfMsg( 'nextrevision' ), 'direction=next&oldid='.$oldid );
1939                 $r = wfMsg( 'revisionasofwithlink', $td, $lnk, $prevlink, $nextlink );
1940                 $wgOut->setSubtitle( $r );
1941         }
1942
1943         /**
1944          * This function is called right before saving the wikitext,
1945          * so we can do things like signatures and links-in-context.
1946          *
1947          * @param string $text
1948          */
1949         function preSaveTransform( $text ) {
1950                 global $wgParser, $wgUser;
1951                 return $wgParser->preSaveTransform( $text, $this->mTitle, $wgUser, ParserOptions::newFromUser( $wgUser ) );
1952         }
1953
1954         /* Caching functions */
1955
1956         /**
1957          * checkLastModified returns true if it has taken care of all
1958          * output to the client that is necessary for this request.
1959          * (that is, it has sent a cached version of the page)
1960          */
1961         function tryFileCache() {
1962                 static $called = false;
1963                 if( $called ) {
1964                         wfDebug( " tryFileCache() -- called twice!?\n" );
1965                         return;
1966                 }
1967                 $called = true;
1968                 if($this->isFileCacheable()) {
1969                         $touched = $this->mTouched;
1970                         $cache = new CacheManager( $this->mTitle );
1971                         if($cache->isFileCacheGood( $touched )) {
1972                                 global $wgOut;
1973                                 wfDebug( " tryFileCache() - about to load\n" );
1974                                 $cache->loadFromFileCache();
1975                                 return true;
1976                         } else {
1977                                 wfDebug( " tryFileCache() - starting buffer\n" );
1978                                 ob_start( array(&$cache, 'saveToFileCache' ) );
1979                         }
1980                 } else {
1981                         wfDebug( " tryFileCache() - not cacheable\n" );
1982                 }
1983         }
1984
1985         /**
1986          * Check if the page can be cached
1987          * @return bool
1988          */
1989         function isFileCacheable() {
1990                 global $wgUser, $wgUseFileCache, $wgShowIPinHeader, $wgRequest;
1991                 extract( $wgRequest->getValues( 'action', 'oldid', 'diff', 'redirect', 'printable' ) );
1992
1993                 return $wgUseFileCache
1994                         and (!$wgShowIPinHeader)
1995                         and ($this->getID() != 0)
1996                         and ($wgUser->getId() == 0)
1997                         and (!$wgUser->getNewtalk())
1998                         and ($this->mTitle->getNamespace() != NS_SPECIAL )
1999                         and (empty( $action ) || $action == 'view')
2000                         and (!isset($oldid))
2001                         and (!isset($diff))
2002                         and (!isset($redirect))
2003                         and (!isset($printable))
2004                         and (!$this->mRedirectedFrom);
2005         }
2006
2007         /**
2008          * Loads cur_touched and returns a value indicating if it should be used
2009          *
2010          */
2011         function checkTouched() {
2012                 $fname = 'Article::checkTouched';
2013                 $id = $this->getID();
2014                 $dbr =& $this->getDB();
2015                 $s = $dbr->selectRow( 'cur', array( 'cur_touched', 'cur_is_redirect' ),
2016                         array( 'cur_id' => $id ), $fname, $this->getSelectOptions() );
2017                 if( $s !== false ) {
2018                         $this->mTouched = wfTimestamp(TS_MW,$s->cur_touched);
2019                         return !$s->cur_is_redirect;
2020                 } else {
2021                         return false;
2022                 }
2023         }
2024
2025         /**
2026          * Edit an article without doing all that other stuff
2027          *
2028          * @param string $text text submitted
2029          * @param string $comment comment submitted
2030          * @param integer $minor whereas it's a minor modification
2031          */
2032         function quickEdit( $text, $comment = '', $minor = 0 ) {
2033                 global $wgUser;
2034                 $fname = 'Article::quickEdit';
2035                 wfProfileIn( $fname );
2036
2037                 $dbw =& wfGetDB( DB_MASTER );
2038                 $ns = $this->mTitle->getNamespace();
2039                 $dbkey = $this->mTitle->getDBkey();
2040                 $encDbKey = $dbw->strencode( $dbkey );
2041                 $timestamp = wfTimestampNow();
2042
2043                 # Save to history
2044                 $dbw->insertSelect( 'old', 'cur',
2045                         array(
2046                                 'old_namespace' => 'cur_namespace',
2047                                 'old_title' => 'cur_title',
2048                                 'old_text' => 'cur_text',
2049                                 'old_comment' => 'cur_comment',
2050                                 'old_user' => 'cur_user',
2051                                 'old_user_text' => 'cur_user_text',
2052                                 'old_timestamp' => 'cur_timestamp',
2053                                 'inverse_timestamp' => '99999999999999-cur_timestamp',
2054                         ), array(
2055                                 'cur_namespace' => $ns,
2056                                 'cur_title' => $dbkey,
2057                         ), $fname
2058                 );
2059
2060                 # Use the affected row count to determine if the article is new
2061                 $numRows = $dbw->affectedRows();
2062
2063                 # Make an array of fields to be inserted
2064                 $fields = array(
2065                         'cur_text' => $text,
2066                         'cur_timestamp' => $timestamp,
2067                         'cur_user' => $wgUser->getID(),
2068                         'cur_user_text' => $wgUser->getName(),
2069                         'inverse_timestamp' => wfInvertTimestamp( $timestamp ),
2070                         'cur_comment' => $comment,
2071                         'cur_is_redirect' => $this->isRedirect( $text ) ? 1 : 0,
2072                         'cur_minor_edit' => intval($minor),
2073                         'cur_touched' => $dbw->timestamp($timestamp),
2074                 );
2075
2076                 if ( $numRows ) {
2077                         # Update article
2078                         $fields['cur_is_new'] = 0;
2079                         $dbw->update( 'cur', $fields, array( 'cur_namespace' => $ns, 'cur_title' => $dbkey ), $fname );
2080                 } else {
2081                         # Insert new article
2082                         $fields['cur_is_new'] = 1;
2083                         $fields['cur_namespace'] = $ns;
2084                         $fields['cur_title'] = $dbkey;
2085                         $fields['cur_random'] = $rand = wfRandom();
2086                         $dbw->insert( 'cur', $fields, $fname );
2087                 }
2088                 wfProfileOut( $fname );
2089         }
2090
2091         /**
2092          * Used to increment the view counter
2093          *
2094          * @static
2095          * @param integer $id article id
2096          */
2097         function incViewCount( $id ) {
2098                 $id = intval( $id );
2099                 global $wgHitcounterUpdateFreq;
2100
2101                 $dbw =& wfGetDB( DB_MASTER );
2102                 $curTable = $dbw->tableName( 'cur' );
2103                 $hitcounterTable = $dbw->tableName( 'hitcounter' );
2104                 $acchitsTable = $dbw->tableName( 'acchits' );
2105
2106                 if( $wgHitcounterUpdateFreq <= 1 ){ //
2107                         $dbw->query( "UPDATE $curTable SET cur_counter = cur_counter + 1 WHERE cur_id = $id" );
2108                         return;
2109                 }
2110
2111                 # Not important enough to warrant an error page in case of failure
2112                 $oldignore = $dbw->ignoreErrors( true );
2113
2114                 $dbw->query( "INSERT INTO $hitcounterTable (hc_id) VALUES ({$id})" );
2115
2116                 $checkfreq = intval( $wgHitcounterUpdateFreq/25 + 1 );
2117                 if( (rand() % $checkfreq != 0) or ($dbw->lastErrno() != 0) ){
2118                         # Most of the time (or on SQL errors), skip row count check
2119                         $dbw->ignoreErrors( $oldignore );
2120                         return;
2121                 }
2122
2123                 $res = $dbw->query("SELECT COUNT(*) as n FROM $hitcounterTable");
2124                 $row = $dbw->fetchObject( $res );
2125                 $rown = intval( $row->n );
2126                 if( $rown >= $wgHitcounterUpdateFreq ){
2127                         wfProfileIn( 'Article::incViewCount-collect' );
2128                         $old_user_abort = ignore_user_abort( true );
2129
2130                         $dbw->query("LOCK TABLES $hitcounterTable WRITE");
2131                         $dbw->query("CREATE TEMPORARY TABLE $acchitsTable TYPE=HEAP ".
2132                                 "SELECT hc_id,COUNT(*) AS hc_n FROM $hitcounterTable ".
2133                                 'GROUP BY hc_id');
2134                         $dbw->query("DELETE FROM $hitcounterTable");
2135                         $dbw->query('UNLOCK TABLES');
2136                         $dbw->query("UPDATE $curTable,$acchitsTable SET cur_counter=cur_counter + hc_n ".
2137                                 'WHERE cur_id = hc_id');
2138                         $dbw->query("DROP TABLE $acchitsTable");
2139
2140                         ignore_user_abort( $old_user_abort );
2141                         wfProfileOut( 'Article::incViewCount-collect' );
2142                 }
2143                 $dbw->ignoreErrors( $oldignore );
2144         }
2145
2146         /**#@+
2147          * The onArticle*() functions are supposed to be a kind of hooks
2148          * which should be called whenever any of the specified actions
2149          * are done.
2150          *
2151          * This is a good place to put code to clear caches, for instance.
2152          *
2153          * This is called on page move and undelete, as well as edit
2154          * @static
2155          * @param $title_obj a title object
2156          */
2157
2158         function onArticleCreate($title_obj) {
2159                 global $wgUseSquid, $wgDeferredUpdateList;
2160
2161                 $titles = $title_obj->getBrokenLinksTo();
2162
2163                 # Purge squid
2164                 if ( $wgUseSquid ) {
2165                         $urls = $title_obj->getSquidURLs();
2166                         foreach ( $titles as $linkTitle ) {
2167                                 $urls[] = $linkTitle->getInternalURL();
2168                         }
2169                         $u = new SquidUpdate( $urls );
2170                         array_push( $wgDeferredUpdateList, $u );
2171                 }
2172
2173                 # Clear persistent link cache
2174                 LinkCache::linksccClearBrokenLinksTo( $title_obj->getPrefixedDBkey() );
2175         }
2176
2177         function onArticleDelete($title_obj) {
2178                 LinkCache::linksccClearLinksTo( $title_obj->getArticleID() );
2179         }
2180         function onArticleEdit($title_obj) {
2181                 LinkCache::linksccClearPage( $title_obj->getArticleID() );
2182         }
2183         /**#@-*/
2184
2185         /**
2186          * Info about this page
2187          */
2188         function info() {
2189                 global $wgUser, $wgTitle, $wgOut, $wgAllowPageInfo;
2190                 $fname = 'Article::info';
2191
2192                 if ( !$wgAllowPageInfo ) {
2193                         $wgOut->errorpage( 'nosuchaction', 'nosuchactiontext' );
2194                         return;
2195                 }
2196
2197                 $dbr =& $this->getDB();
2198
2199                 $basenamespace = $wgTitle->getNamespace() & (~1);
2200                 $cur_clause = array( 'cur_title' => $wgTitle->getDBkey(), 'cur_namespace' => $basenamespace );
2201                 $old_clause = array( 'old_title' => $wgTitle->getDBkey(), 'old_namespace' => $basenamespace );
2202                 $wl_clause  = array( 'wl_title' => $wgTitle->getDBkey(), 'wl_namespace' => $basenamespace );
2203                 $fullTitle = $wgTitle->makeName($basenamespace, $wgTitle->getDBKey());
2204                 $wgOut->setPagetitle(  $fullTitle );
2205                 $wgOut->setSubtitle( wfMsg( 'infosubtitle' ));
2206
2207                 # first, see if the page exists at all.
2208                 $exists = $dbr->selectField( 'cur', 'COUNT(*)', $cur_clause, $fname, $this->getSelectOptions() );
2209                 if ($exists < 1) {
2210                         $wgOut->addHTML( wfMsg('noarticletext') );
2211                 } else {
2212                         $numwatchers = $dbr->selectField( 'watchlist', 'COUNT(*)', $wl_clause, $fname,
2213                                 $this->getSelectOptions() );
2214                         $wgOut->addHTML( "<ul><li>" . wfMsg("numwatchers", $numwatchers) . '</li>' );
2215                         $old = $dbr->selectField( 'old', 'COUNT(*)', $old_clause, $fname, $this->getSelectOptions() );
2216                         $wgOut->addHTML( "<li>" . wfMsg('numedits', $old + 1) . '</li>');
2217
2218                         # to find number of distinct authors, we need to do some
2219                         # funny stuff because of the cur/old table split:
2220                         # - first, find the name of the 'cur' author
2221                         # - then, find the number of *other* authors in 'old'
2222
2223                         # find 'cur' author
2224                         $cur_author = $dbr->selectField( 'cur', 'cur_user_text', $cur_clause, $fname,
2225                                 $this->getSelectOptions() );
2226
2227                         # find number of 'old' authors excluding 'cur' author
2228                         $authors = $dbr->selectField( 'old', 'COUNT(DISTINCT old_user_text)',
2229                                 $old_clause + array( 'old_user_text<>' . $dbr->addQuotes( $cur_author ) ), $fname,
2230                                 $this->getSelectOptions() ) + 1;
2231
2232                         # now for the Talk page ...
2233                         $cur_clause = array( 'cur_title' => $wgTitle->getDBkey(), 'cur_namespace' => $basenamespace+1 );
2234                         $old_clause = array( 'old_title' => $wgTitle->getDBkey(), 'old_namespace' => $basenamespace+1 );
2235
2236                         # does it exist?
2237                         $exists = $dbr->selectField( 'cur', 'COUNT(*)', $cur_clause, $fname, $this->getSelectOptions() );
2238
2239                         # number of edits
2240                         if ($exists > 0) {
2241                                 $old = $dbr->selectField( 'old', 'COUNT(*)', $old_clause, $fname, $this->getSelectOptions() );
2242                                 $wgOut->addHTML( '<li>' . wfMsg("numtalkedits", $old + 1) . '</li>');
2243                         }
2244                         $wgOut->addHTML( '<li>' . wfMsg("numauthors", $authors) . '</li>' );
2245
2246                         # number of authors
2247                         if ($exists > 0) {
2248                                 $cur_author = $dbr->selectField( 'cur', 'cur_user_text', $cur_clause, $fname,
2249                                         $this->getSelectOptions() );
2250                                 $authors = $dbr->selectField( 'cur', 'COUNT(DISTINCT old_user_text)',
2251                                         $old_clause + array( 'old_user_text<>' . $dbr->addQuotes( $cur_author ) ),
2252                                         $fname, $this->getSelectOptions() );
2253
2254                                 $wgOut->addHTML( '<li>' . wfMsg('numtalkauthors', $authors) . '</li></ul>' );
2255                         }
2256                 }
2257         }
2258 }
2259
2260 ?>