includes/Article.php

   1 <?php
   2 /**
   3  * File for articles
   4  * @version $Id$
   5  * @package MediaWiki
   6  */
   7
   8 /**
   9  * Need the CacheManager to be loaded
  10  */
  11 require_once ( 'CacheManager.php' );
  12
  13 $wgArticleCurContentFields = false;
  14 $wgArticleOldContentFields = false;
  15
  16 /**
  17  * Class representing a Wikipedia article and history.
  18  *
  19  * See design.doc for an overview.
  20  * Note: edit user interface and cache support functions have been
  21  * moved to separate EditPage and CacheManager classes.
  22  *
  23  * @version $Id$
  24  * @package MediaWiki
  25  */
  26 class Article {
  27         /**#@+
  28          * @access private
  29          */
  30         var $mContent, $mContentLoaded;
  31         var $mUser, $mTimestamp, $mUserText;
  32         var $mCounter, $mComment, $mCountAdjustment;
  33         var $mMinorEdit, $mRedirectedFrom;
  34         var $mTouched, $mFileCache, $mTitle;
  35         var $mId, $mTable;
  36         var $mForUpdate;
  37         /**#@-*/
  38
  39         /**
  40          * Constructor and clear the article
  41          * @param mixed &$title
  42          */
  43         function Article( &$title ) {
  44                 $this->mTitle =& $title;
  45                 $this->clear();
  46         }
  47
  48         /**
  49           * Clear the object
  50           * @private
  51           */
  52         function clear() {
  53                 $this->mContentLoaded = false;
  54                 $this->mCurID = $this->mUser = $this->mCounter = -1; # Not loaded
  55                 $this->mRedirectedFrom = $this->mUserText =
  56                 $this->mTimestamp = $this->mComment = $this->mFileCache = '';
  57                 $this->mCountAdjustment = 0;
  58                 $this->mTouched = '19700101000000';
  59                 $this->mForUpdate = false;
  60         }
  61
  62         /**
  63           * Get revision text associated with an old or archive row
  64           * $row is usually an object from wfFetchRow(), both the flags and the text
  65           * field must be included
  66           * @static
  67           * @param integer $row Id of a row
  68           * @param string $prefix table prefix (default 'old_')
  69           * @return string $text|false the text requested
  70         */
  71         function getRevisionText( $row, $prefix = 'old_' ) {
  72                 # Get data
  73                 $textField = $prefix . 'text';
  74                 $flagsField = $prefix . 'flags';
  75
  76                 if( isset( $row->$flagsField ) ) {
  77                         $flags = explode( ',', $row->$flagsField );
  78                 } else {
  79                         $flags = array();
  80                 }
  81
  82                 if( isset( $row->$textField ) ) {
  83                         $text = $row->$textField;
  84                 } else {
  85                         return false;
  86                 }
  87
  88                 if( in_array( 'gzip', $flags ) ) {
  89                         # Deal with optional compression of archived pages.
  90                         # This can be done periodically via maintenance/compressOld.php, and
  91                         # as pages are saved if $wgCompressRevisions is set.
  92                         $text = gzinflate( $text );
  93                 }
  94
  95                 if( in_array( 'object', $flags ) ) {
  96                         # Generic compressed storage
  97                         $obj = unserialize( $text );
  98
  99                         # Bugger, corrupted my test database by double-serializing
 100                         if ( !is_object( $obj ) ) {
 101                                 $obj = unserialize( $obj );
 102                         }
 103
 104                         $text = $obj->getText();
 105                 }
 106
 107                 global $wgLegacyEncoding;
 108                 if( $wgLegacyEncoding && !in_array( 'utf-8', $flags ) ) {
 109                         # Old revisions kept around in a legacy encoding?
 110                         # Upconvert on demand.
 111                         global $wgInputEncoding, $wgContLang;
 112                         $text = $wgContLang->iconv( $wgLegacyEncoding, $wgInputEncoding, $text );
 113                 }
 114                 return $text;
 115         }
 116
 117         /**
 118          * If $wgCompressRevisions is enabled, we will compress data.
 119          * The input string is modified in place.
 120          * Return value is the flags field: contains 'gzip' if the
 121          * data is compressed, and 'utf-8' if we're saving in UTF-8
 122          * mode.
 123          *
 124          * @static
 125          * @param mixed $text reference to a text
 126          * @return string
 127          */
 128         function compressRevisionText( &$text ) {
 129                 global $wgCompressRevisions, $wgUseLatin1;
 130                 $flags = array();
 131                 if( !$wgUseLatin1 ) {
 132                         # Revisions not marked this way will be converted
 133                         # on load if $wgLegacyCharset is set in the future.
 134                         $flags[] = 'utf-8';
 135                 }
 136                 if( $wgCompressRevisions ) {
 137                         if( function_exists( 'gzdeflate' ) ) {
 138                                 $text = gzdeflate( $text );
 139                                 $flags[] = 'gzip';
 140                         } else {
 141                                 wfDebug( "Article::compressRevisionText() -- no zlib support, not compressing\n" );
 142                         }
 143                 }
 144                 return implode( ',', $flags );
 145         }
 146
 147         /**
 148          * Note that getContent/loadContent may follow redirects if
 149          * not told otherwise, and so may cause a change to mTitle.
 150          *
 151          * @param $noredir
 152          * @return Return the text of this revision
 153         */
 154         function getContent( $noredir ) {
 155                 global $wgRequest;
 156
 157                 # Get variables from query string :P
 158                 $action = $wgRequest->getText( 'action', 'view' );
 159                 $section = $wgRequest->getText( 'section' );
 160
 161                 $fname =  'Article::getContent';
 162                 wfProfileIn( $fname );
 163
 164                 if ( 0 == $this->getID() ) {
 165                         if ( 'edit' == $action ) {
 166                                 wfProfileOut( $fname );
 167                                 return ''; # was "newarticletext", now moved above the box)
 168                         }
 169                         wfProfileOut( $fname );
 170                         return wfMsg( 'noarticletext' );
 171                 } else {
 172                         $this->loadContent( $noredir );
 173                         # check if we're displaying a [[User talk:x.x.x.x]] anonymous talk page
 174                         if ( $this->mTitle->getNamespace() == NS_USER_TALK &&
 175                           preg_match('/^\d{1,3}\.\d{1,3}.\d{1,3}\.\d{1,3}$/',$this->mTitle->getText()) &&
 176                           $action=='view'
 177                         ) {
 178                                 wfProfileOut( $fname );
 179                                 return $this->mContent . "\n" .wfMsg('anontalkpagetext');
 180                         } else {
 181                                 if($action=='edit') {
 182                                         if($section!='') {
 183                                                 if($section=='new') {
 184                                                         wfProfileOut( $fname );
 185                                                         return '';
 186                                                 }
 187
 188                                                 # strip NOWIKI etc. to avoid confusion (true-parameter causes HTML
 189                                                 # comments to be stripped as well)
 190                                                 $rv=$this->getSection($this->mContent,$section);
 191                                                 wfProfileOut( $fname );
 192                                                 return $rv;
 193                                         }
 194                                 }
 195                                 wfProfileOut( $fname );
 196                                 return $this->mContent;
 197                         }
 198                 }
 199         }
 200
 201         /**
 202          * This function returns the text of a section, specified by a number ($section).
 203          * A section is text under a heading like == Heading == or <h1>Heading</h1>, or
 204          * the first section before any such heading (section 0).
 205          *
 206          * If a section contains subsections, these are also returned.
 207          *
 208          * @param string $text text to look in
 209          * @param integer $section section number
 210          * @return string text of the requested section
 211          */
 212         function getSection($text,$section) {
 213
 214                 # strip NOWIKI etc. to avoid confusion (true-parameter causes HTML
 215                 # comments to be stripped as well)
 216                 $striparray=array();
 217                 $parser=new Parser();
 218                 $parser->mOutputType=OT_WIKI;
 219                 $striptext=$parser->strip($text, $striparray, true);
 220
 221                 # now that we can be sure that no pseudo-sections are in the source,
 222                 # split it up by section
 223                 $secs =
 224                   preg_split(
 225                   '/(^=+.+?=+|^<h[1-6].*?' . '>.*?<\/h[1-6].*?' . '>)(?!\S)/mi',
 226                   $striptext, -1,
 227                   PREG_SPLIT_DELIM_CAPTURE);
 228                 if($section==0) {
 229                         $rv=$secs[0];
 230                 } else {
 231                         $headline=$secs[$section*2-1];
 232                         preg_match( '/^(=+).+?=+|^<h([1-6]).*?' . '>.*?<\/h[1-6].*?' . '>(?!\S)/mi',$headline,$matches);
 233                         $hlevel=$matches[1];
 234
 235                         # translate wiki heading into level
 236                         if(strpos($hlevel,'=')!==false) {
 237                                 $hlevel=strlen($hlevel);
 238                         }
 239
 240                         $rv=$headline. $secs[$section*2];
 241                         $count=$section+1;
 242
 243                         $break=false;
 244                         while(!empty($secs[$count*2-1]) && !$break) {
 245
 246                                 $subheadline=$secs[$count*2-1];
 247                                 preg_match( '/^(=+).+?=+|^<h([1-6]).*?' . '>.*?<\/h[1-6].*?' . '>(?!\S)/mi',$subheadline,$matches);
 248                                 $subhlevel=$matches[1];
 249                                 if(strpos($subhlevel,'=')!==false) {
 250                                         $subhlevel=strlen($subhlevel);
 251                                 }
 252                                 if($subhlevel > $hlevel) {
 253                                         $rv.=$subheadline.$secs[$count*2];
 254                                 }
 255                                 if($subhlevel <= $hlevel) {
 256                                         $break=true;
 257                                 }
 258                                 $count++;
 259
 260                         }
 261                 }
 262                 # reinsert stripped tags
 263                 $rv=$parser->unstrip($rv,$striparray);
 264                 $rv=$parser->unstripNoWiki($rv,$striparray);
 265                 $rv=trim($rv);
 266                 return $rv;
 267
 268         }
 269
 270         /**
 271          * Return an array of the columns of the "cur"-table
 272          */
 273         function &getCurContentFields() {
 274                 global $wgArticleCurContentFields;
 275                 if ( !$wgArticleCurContentFields ) {
 276                         $wgArticleCurContentFields = array( 'cur_text','cur_timestamp','cur_user', 'cur_user_text',
 277                           'cur_comment','cur_counter','cur_restrictions','cur_touched' );
 278                 }
 279                 return $wgArticleCurContentFields;
 280         }
 281
 282         /**
 283          * Return an array of the columns of the "old"-table
 284          */
 285         function &getOldContentFields() {
 286                 global $wgArticleOldContentFields;
 287                 if ( !$wgArticleOldContentFields ) {
 288                         $wgArticleOldContentFields = array( 'old_namespace','old_title','old_text','old_timestamp',
 289                           'old_user','old_user_text','old_comment','old_flags' );
 290                 }
 291                 return $wgArticleOldContentFields;
 292         }
 293
 294         /**
 295          * Return the oldid of the article that is to be shown.
 296          * For requests with a "direction", this is not the oldid of the
 297          * query
 298          */
 299         function getOldID() {
 300                 global $wgRequest, $wgOut;
 301                 static $lastid;
 302
 303                 if ( isset( $lastid ) ) {
 304                         return $lastid;
 305                 }
 306
 307                 $oldid = $wgRequest->getVal( 'oldid' );
 308                 if ( isset( $oldid ) ) {
 309                         $dbr =& $this->getDB();
 310                         $oldid = IntVal( $oldid );
 311                         if ( $wgRequest->getVal( 'direction' ) == 'next' ) {
 312                                 $nextid = $this->mTitle->getNextRevisionID( $oldid );
 313                                 if ( $nextid ) {
 314                                         $oldid = $nextid;
 315                                 } else {
 316                                         $wgOut->redirect( $this->mTitle->getFullURL( 'redirect=no' ) );
 317                                 }
 318                         } elseif ( $wgRequest->getVal( 'direction' ) == 'prev' ) {
 319                                 $previd = $this->mTitle->getPreviousRevisionID( $oldid );
 320                                 if ( $previd ) {
 321                                         $oldid = $previd;
 322                                 } else {
 323                                         # TODO
 324                                 }
 325                         }
 326                         $lastid = $oldid;
 327                 }
 328                 return @$oldid; # "@" to be able to return "unset" without PHP complaining
 329         }
 330
 331
 332         /**
 333          * Load the revision (including cur_text) into this object
 334         */
 335         function loadContent( $noredir = false ) {
 336                 global $wgOut, $wgRequest;
 337
 338                 if ( $this->mContentLoaded ) return;
 339
 340                 $dbr =& $this->getDB();
 341                 # Query variables :P
 342                 $oldid = $this->getOldID();
 343                 $redirect = $wgRequest->getVal( 'redirect' );
 344
 345                 $fname = 'Article::loadContent';
 346
 347                 # Pre-fill content with error message so that if something
 348                 # fails we'll have something telling us what we intended.
 349
 350                 $t = $this->mTitle->getPrefixedText();
 351
 352                 if ( isset( $oldid ) ) {
 353                         $t .= ',oldid='.$oldid;
 354                 }
 355                 if ( isset( $redirect ) ) {
 356                         $redirect = ($redirect == 'no') ? 'no' : 'yes';
 357                         $t .= ',redirect='.$redirect;
 358                 }
 359                 $this->mContent = wfMsg( 'missingarticle', $t );
 360
 361                 if ( ! $oldid ) {       # Retrieve current version
 362                         $id = $this->getID();
 363                         if ( 0 == $id ) return;
 364
 365                         $s = $dbr->selectRow( 'cur', $this->getCurContentFields(), array( 'cur_id' => $id ), $fname,
 366                                 $this->getSelectOptions() );
 367                         if ( $s === false ) {
 368                                 return;
 369                         }
 370
 371                         # If we got a redirect, follow it (unless we've been told
 372                         # not to by either the function parameter or the query
 373                         if ( ( 'no' != $redirect ) && ( false == $noredir ) ) {
 374                                 $rt = Title::newFromRedirect( $s->cur_text );
 375                                 # process if title object is valid and not special:userlogout
 376                                 if ( $rt && ! ( $rt->getNamespace() == NS_SPECIAL && $rt->getText() == 'Userlogout' ) ) {
 377                                         # Gotta hand redirects to special pages differently:
 378                                         # Fill the HTTP response "Location" header and ignore
 379                                         # the rest of the page we're on.
 380
 381                                         if ( $rt->getInterwiki() != '' ) {
 382                                                 $wgOut->redirect( $rt->getFullURL() ) ;
 383                                                 return;
 384                                         }
 385                                         if ( $rt->getNamespace() == NS_SPECIAL ) {
 386                                                 $wgOut->redirect( $rt->getFullURL() );
 387                                                 return;
 388                                         }
 389                                         $rid = $rt->getArticleID();
 390                                         if ( 0 != $rid ) {
 391                                                 $redirRow = $dbr->selectRow( 'cur', $this->getCurContentFields(),
 392                                                         array( 'cur_id' => $rid ), $fname, $this->getSelectOptions() );
 393
 394                                                 if ( $redirRow !== false ) {
 395                                                         $this->mRedirectedFrom = $this->mTitle->getPrefixedText();
 396                                                         $this->mTitle = $rt;
 397                                                         $s = $redirRow;
 398                                                 }
 399                                         }
 400                                 }
 401                         }
 402
 403                         $this->mContent = $s->cur_text;
 404                         $this->mUser = $s->cur_user;
 405                         $this->mUserText = $s->cur_user_text;
 406                         $this->mComment = $s->cur_comment;
 407                         $this->mCounter = $s->cur_counter;
 408                         $this->mTimestamp = wfTimestamp(TS_MW,$s->cur_timestamp);
 409                         $this->mTouched = wfTimestamp(TS_MW,$s->cur_touched);
 410                         $this->mTitle->mRestrictions = explode( ',', trim( $s->cur_restrictions ) );
 411                         $this->mTitle->mRestrictionsLoaded = true;
 412                 } else { # oldid set, retrieve historical version
 413                         $s = $dbr->selectRow( 'old', $this->getOldContentFields(), array( 'old_id' => $oldid ),
 414                                 $fname, $this->getSelectOptions() );
 415                         if ( $s === false ) {
 416                                 return;
 417                         }
 418
 419                         if( $this->mTitle->getNamespace() != $s->old_namespace ||
 420                                 $this->mTitle->getDBkey() != $s->old_title ) {
 421                                 $oldTitle = Title::makeTitle( $s->old_namesapce, $s->old_title );
 422                                 $this->mTitle = $oldTitle;
 423                                 $wgTitle = $oldTitle;
 424                         }
 425                         $this->mContent = Article::getRevisionText( $s );
 426                         $this->mUser = $s->old_user;
 427                         $this->mUserText = $s->old_user_text;
 428                         $this->mComment = $s->old_comment;
 429                         $this->mCounter = 0;
 430                         $this->mTimestamp = wfTimestamp(TS_MW,$s->old_timestamp);
 431                 }
 432                 $this->mContentLoaded = true;
 433                 return $this->mContent;
 434         }
 435
 436         /**
 437          * Gets the article text without using so many damn globals
 438          * Returns false on error
 439          *
 440          * @param integer $oldid
 441          */
 442         function getContentWithoutUsingSoManyDamnGlobals( $oldid = 0, $noredir = false ) {
 443                 if ( $this->mContentLoaded ) {
 444                         return $this->mContent;
 445                 }
 446                 $this->mContent = false;
 447
 448                 $fname = 'Article::getContentWithout';
 449                 $dbr =& $this->getDB();
 450
 451                 if ( ! $oldid ) {       # Retrieve current version
 452                         $id = $this->getID();
 453                         if ( 0 == $id ) {
 454                                 return false;
 455                         }
 456
 457                         $s = $dbr->selectRow( 'cur', $this->getCurContentFields(), array( 'cur_id' => $id ),
 458                                 $fname, $this->getSelectOptions() );
 459                         if ( $s === false ) {
 460                                 return false;
 461                         }
 462
 463                         # If we got a redirect, follow it (unless we've been told
 464                         # not to by either the function parameter or the query
 465                         if ( !$noredir ) {
 466                                 $rt = Title::newFromRedirect( $s->cur_text );
 467                                 if( $rt &&  $rt->getInterwiki() == '' && $rt->getNamespace() != NS_SPECIAL ) {
 468                                         $rid = $rt->getArticleID();
 469                                         if ( 0 != $rid ) {
 470                                                 $redirRow = $dbr->selectRow( 'cur', $this->getCurContentFields(),
 471                                                         array( 'cur_id' => $rid ), $fname, $this->getSelectOptions() );
 472
 473                                                 if ( $redirRow !== false ) {
 474                                                         $this->mRedirectedFrom = $this->mTitle->getPrefixedText();
 475                                                         $this->mTitle = $rt;
 476                                                         $s = $redirRow;
 477                                                 }
 478                                         }
 479                                 }
 480                         }
 481
 482                         $this->mContent = $s->cur_text;
 483                         $this->mUser = $s->cur_user;
 484                         $this->mUserText = $s->cur_user_text;
 485                         $this->mComment = $s->cur_comment;
 486                         $this->mCounter = $s->cur_counter;
 487                         $this->mTimestamp = wfTimestamp(TS_MW,$s->cur_timestamp);
 488                         $this->mTouched = wfTimestamp(TS_MW,$s->cur_touched);
 489                         $this->mTitle->mRestrictions = explode( ',', trim( $s->cur_restrictions ) );
 490                         $this->mTitle->mRestrictionsLoaded = true;
 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                 $sk = $wgUser->getSkin();
 685
 686                 $fname = 'Article::view';
 687                 wfProfileIn( $fname );
 688                 # Get variables from query string
 689                 $oldid = $this->getOldID();
 690                 $diff = $wgRequest->getVal( 'diff' );
 691                 $rcid = $wgRequest->getVal( 'rcid' );
 692
 693                 $wgOut->setArticleFlag( true );
 694                 $wgOut->setRobotpolicy( 'index,follow' );
 695                 # If we got diff and oldid in the query, we want to see a
 696                 # diff page instead of the article.
 697
 698                 if ( !is_null( $diff ) ) {
 699                         require_once( 'DifferenceEngine.php' );
 700                         $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
 701                         $de = new DifferenceEngine( $oldid, $diff, $rcid );
 702                         $de->showDiffPage();
 703                         if( $diff == 0 ) {
 704                                 # Run view updates for current revision only
 705                                 $this->viewUpdates();
 706                         }
 707                         wfProfileOut( $fname );
 708                         return;
 709                 }
 710                 if ( empty( $oldid ) && $this->checkTouched() ) {
 711                         if( $wgOut->checkLastModified( $this->mTouched ) ){
 712                                 wfProfileOut( $fname );
 713                                 return;
 714                         } else if ( $this->tryFileCache() ) {
 715                                 # tell wgOut that output is taken care of
 716                                 $wgOut->disable();
 717                                 $this->viewUpdates();
 718                                 wfProfileOut( $fname );
 719                                 return;
 720                         }
 721                 }
 722                 # Should the parser cache be used?
 723                 if ( $wgEnableParserCache && intval($wgUser->getOption( 'stubthreshold' )) == 0 && empty( $oldid ) ) {
 724                         $pcache = true;
 725                 } else {
 726                         $pcache = false;
 727                 }
 728
 729                 $outputDone = false;
 730                 if ( $pcache ) {
 731                         if ( $wgOut->tryParserCache( $this, $wgUser ) ) {
 732                                 $outputDone = true;
 733                         }
 734                 }
 735                 if ( !$outputDone ) {
 736                         $text = $this->getContent( false ); # May change mTitle by following a redirect
 737
 738                         # Another whitelist check in case oldid or redirects are altering the title
 739                         if ( !$this->mTitle->userCanRead() ) {
 740                                 $wgOut->loginToUse();
 741                                 $wgOut->output();
 742                                 exit;
 743                         }
 744
 745
 746                         # We're looking at an old revision
 747
 748                         if ( !empty( $oldid ) ) {
 749                                 $this->setOldSubtitle( $oldid );
 750                                 $wgOut->setRobotpolicy( 'noindex,follow' );
 751                         }
 752                         if ( '' != $this->mRedirectedFrom ) {
 753                                 $sk = $wgUser->getSkin();
 754                                 $redir = $sk->makeKnownLink( $this->mRedirectedFrom, '',
 755                                   'redirect=no' );
 756                                 $s = wfMsg( 'redirectedfrom', $redir );
 757                                 $wgOut->setSubtitle( $s );
 758
 759                                 # Can't cache redirects
 760                                 $pcache = false;
 761                         }
 762
 763                         # wrap user css and user js in pre and don't parse
 764                         # XXX: use $this->mTitle->usCssJsSubpage() when php is fixed/ a workaround is found
 765                         if (
 766                                 $this->mTitle->getNamespace() == NS_USER &&
 767                                 preg_match('/\\/[\\w]+\\.(css|js)$/', $this->mTitle->getDBkey())
 768                         ) {
 769                                 $wgOut->addWikiText( wfMsg('clearyourcache'));
 770                                 $wgOut->addHTML( '<pre>'.htmlspecialchars($this->mContent)."\n</pre>" );
 771                         } else if ( $rt = Title::newFromRedirect( $text ) ) {
 772                                 # Display redirect
 773                                 $imageUrl = $wgStylePath.'/common/images/redirect.png';
 774                                 $targetUrl = $rt->escapeLocalURL();
 775                                 $titleText = htmlspecialchars( $rt->getPrefixedText() );
 776                                 $link = $sk->makeLinkObj( $rt );
 777
 778                                 $wgOut->addHTML( '<img valign="center" src="'.$imageUrl.'" alt="#REDIRECT" />' .
 779                                   '<span class="redirectText">'.$link.'</span>' );
 780
 781                         } else if ( $pcache ) {
 782                                 # Display content and save to parser cache
 783                                 $wgOut->addPrimaryWikiText( $text, $this );
 784                         } else {
 785                                 # Display content, don't attempt to save to parser cache
 786                                 $wgOut->addWikiText( $text );
 787                         }
 788                 }
 789                 $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
 790                 # If we have been passed an &rcid= parameter, we want to give the user a
 791                 # chance to mark this new article as patrolled.
 792                 if ( $wgUseRCPatrol && !is_null ( $rcid ) && $rcid != 0 && $wgUser->getID() != 0 &&
 793                      ( $wgUser->isAllowed('patrol') || !$wgOnlySysopsCanPatrol ) )
 794                 {
 795                         $wgOut->addHTML( wfMsg ( 'markaspatrolledlink',
 796                                 $sk->makeKnownLinkObj ( $this->mTitle, wfMsg ( 'markaspatrolledtext' ),
 797                                         'action=markpatrolled&rcid='.$rcid )
 798                          ) );
 799                 }
 800
 801                 # Put link titles into the link cache
 802                 $wgOut->transformBuffer();
 803
 804                 # Add link titles as META keywords
 805                 $wgOut->addMetaTags() ;
 806
 807                 $this->viewUpdates();
 808                 wfProfileOut( $fname );
 809         }
 810
 811         /**
 812          * Theoretically we could defer these whole insert and update
 813          * functions for after display, but that's taking a big leap
 814          * of faith, and we want to be able to report database
 815          * errors at some point.
 816          * @private
 817          */
 818         function insertNewArticle( $text, $summary, $isminor, $watchthis ) {
 819                 global $wgOut, $wgUser;
 820                 global $wgUseSquid, $wgDeferredUpdateList, $wgInternalServer;
 821
 822                 $fname = 'Article::insertNewArticle';
 823
 824                 $this->mCountAdjustment = $this->isCountable( $text );
 825
 826                 $ns = $this->mTitle->getNamespace();
 827                 $ttl = $this->mTitle->getDBkey();
 828                 $text = $this->preSaveTransform( $text );
 829                 if ( $this->isRedirect( $text ) ) { $redir = 1; }
 830                 else { $redir = 0; }
 831
 832                 $now = wfTimestampNow();
 833                 $won = wfInvertTimestamp( $now );
 834                 wfSeedRandom();
 835                 $rand = wfRandom();
 836                 $dbw =& wfGetDB( DB_MASTER );
 837
 838                 $cur_id = $dbw->nextSequenceValue( 'cur_cur_id_seq' );
 839
 840                 $isminor = ( $isminor && $wgUser->getID() ) ? 1 : 0;
 841
 842                 $dbw->insert( 'cur', array(
 843                         'cur_id' => $cur_id,
 844                         'cur_namespace' => $ns,
 845                         'cur_title' => $ttl,
 846                         'cur_text' => $text,
 847                         'cur_comment' => $summary,
 848                         'cur_user' => $wgUser->getID(),
 849                         'cur_timestamp' => $dbw->timestamp($now),
 850                         'cur_minor_edit' => $isminor,
 851                         'cur_counter' => 0,
 852                         'cur_restrictions' => '',
 853                         'cur_user_text' => $wgUser->getName(),
 854                         'cur_is_redirect' => $redir,
 855                         'cur_is_new' => 1,
 856                         'cur_random' => $rand,
 857                         'cur_touched' => $dbw->timestamp($now),
 858                         'inverse_timestamp' => $won,
 859                 ), $fname );
 860
 861                 $newid = $dbw->insertId();
 862                 $this->mTitle->resetArticleID( $newid );
 863
 864                 Article::onArticleCreate( $this->mTitle );
 865                 RecentChange::notifyNew( $now, $this->mTitle, $isminor, $wgUser, $summary );
 866
 867                 if ($watchthis) {
 868                         if(!$this->mTitle->userIsWatching()) $this->watch();
 869                 } else {
 870                         if ( $this->mTitle->userIsWatching() ) {
 871                                 $this->unwatch();
 872                         }
 873                 }
 874
 875                 # The talk page isn't in the regular link tables, so we need to update manually:
 876                 $talkns = $ns ^ 1; # talk -> normal; normal -> talk
 877                 $dbw->update( 'cur', array('cur_touched' => $dbw->timestamp($now) ),
 878                         array(  'cur_namespace' => $talkns, 'cur_title' => $ttl ), $fname );
 879
 880                 # standard deferred updates
 881                 $this->editUpdates( $text );
 882
 883                 $this->showArticle( $text, wfMsg( 'newarticle' ) );
 884         }
 885
 886
 887         /**
 888          * Side effects: loads last edit if $edittime is NULL
 889          */
 890         function getTextOfLastEditWithSectionReplacedOrAdded($section, $text, $summary = '', $edittime = NULL) {
 891                 $fname = 'Article::getTextOfLastEditWithSectionReplacedOrAdded';
 892                 if(is_null($edittime)) {
 893                         $this->loadLastEdit();
 894                         $oldtext = $this->getContent( true );
 895                 } else {
 896                         $dbw =& wfGetDB( DB_MASTER );
 897                         $ns = $this->mTitle->getNamespace();
 898                         $title = $this->mTitle->getDBkey();
 899                         $obj = $dbw->selectRow( 'old',
 900                                 array( 'old_text','old_flags'),
 901                                 array( 'old_namespace' => $ns, 'old_title' => $title,
 902                                         'old_timestamp' => $dbw->timestamp($edittime)),
 903                                 $fname );
 904                         $oldtext = Article::getRevisionText( $obj );
 905                 }
 906                 if ($section != '') {
 907                         if($section=='new') {
 908                                 if($summary) $subject="== {$summary} ==\n\n";
 909                                 $text=$oldtext."\n\n".$subject.$text;
 910                         } else {
 911
 912                                 # strip NOWIKI etc. to avoid confusion (true-parameter causes HTML
 913                                 # comments to be stripped as well)
 914                                 $striparray=array();
 915                                 $parser=new Parser();
 916                                 $parser->mOutputType=OT_WIKI;
 917                                 $oldtext=$parser->strip($oldtext, $striparray, true);
 918
 919                                 # now that we can be sure that no pseudo-sections are in the source,
 920                                 # split it up
 921                                 # Unfortunately we can't simply do a preg_replace because that might
 922                                 # replace the wrong section, so we have to use the section counter instead
 923                                 $secs=preg_split('/(^=+.+?=+|^<h[1-6].*?' . '>.*?<\/h[1-6].*?' . '>)(?!\S)/mi',
 924                                   $oldtext,-1,PREG_SPLIT_DELIM_CAPTURE);
 925                                 $secs[$section*2]=$text."\n\n"; // replace with edited
 926
 927                                 # section 0 is top (intro) section
 928                                 if($section!=0) {
 929
 930                                         # headline of old section - we need to go through this section
 931                                         # to determine if there are any subsections that now need to
 932                                         # be erased, as the mother section has been replaced with
 933                                         # the text of all subsections.
 934                                         $headline=$secs[$section*2-1];
 935                                         preg_match( '/^(=+).+?=+|^<h([1-6]).*?' . '>.*?<\/h[1-6].*?' . '>(?!\S)/mi',$headline,$matches);
 936                                         $hlevel=$matches[1];
 937
 938                                         # determine headline level for wikimarkup headings
 939                                         if(strpos($hlevel,'=')!==false) {
 940                                                 $hlevel=strlen($hlevel);
 941                                         }
 942
 943                                         $secs[$section*2-1]=''; // erase old headline
 944                                         $count=$section+1;
 945                                         $break=false;
 946                                         while(!empty($secs[$count*2-1]) && !$break) {
 947
 948                                                 $subheadline=$secs[$count*2-1];
 949                                                 preg_match(
 950                                                  '/^(=+).+?=+|^<h([1-6]).*?' . '>.*?<\/h[1-6].*?' . '>(?!\S)/mi',$subheadline,$matches);
 951                                                 $subhlevel=$matches[1];
 952                                                 if(strpos($subhlevel,'=')!==false) {
 953                                                         $subhlevel=strlen($subhlevel);
 954                                                 }
 955                                                 if($subhlevel > $hlevel) {
 956                                                         // erase old subsections
 957                                                         $secs[$count*2-1]='';
 958                                                         $secs[$count*2]='';
 959                                                 }
 960                                                 if($subhlevel <= $hlevel) {
 961                                                         $break=true;
 962                                                 }
 963                                                 $count++;
 964
 965                                         }
 966
 967                                 }
 968                                 $text=join('',$secs);
 969                                 # reinsert the stuff that we stripped out earlier
 970                                 $text=$parser->unstrip($text,$striparray);
 971                                 $text=$parser->unstripNoWiki($text,$striparray);
 972                         }
 973
 974                 }
 975                 return $text;
 976         }
 977
 978         /**
 979          * Change an existing article. Puts the previous version back into the old table, updates RC
 980          * and all necessary caches, mostly via the deferred update array.
 981          *
 982          * It is possible to call this function from a command-line script, but note that you should
 983          * first set $wgUser, and clean up $wgDeferredUpdates after each edit.
 984          */
 985         function updateArticle( $text, $summary, $minor, $watchthis, $forceBot = false, $sectionanchor = '' ) {
 986                 global $wgOut, $wgUser;
 987                 global $wgDBtransactions, $wgMwRedir;
 988                 global $wgUseSquid, $wgInternalServer;
 989
 990                 $fname = 'Article::updateArticle';
 991                 $good = true;
 992
 993                 if ( $this->mMinorEdit ) { $me1 = 1; } else { $me1 = 0; }
 994                 if ( $minor && $wgUser->getID() ) { $me2 = 1; } else { $me2 = 0; }
 995                 if ( $this->isRedirect( $text ) ) {
 996                         # Remove all content but redirect
 997                         # This could be done by reconstructing the redirect from a title given by
 998                         # Title::newFromRedirect(), but then we wouldn't know which synonym the user
 999                         # wants to see
1000                         if ( preg_match( "/^((" . $wgMwRedir->getBaseRegex() . ')[^\\n]+)/i', $text, $m ) ) {
1001                                 $redir = 1;
1002                                 $text = $m[1] . "\n";
1003                         }
1004                 }
1005                 else { $redir = 0; }
1006
1007                 $text = $this->preSaveTransform( $text );
1008                 $dbw =& wfGetDB( DB_MASTER );
1009
1010                 # Update article, but only if changed.
1011
1012                 # It's important that we either rollback or complete, otherwise an attacker could
1013                 # overwrite cur entries by sending precisely timed user aborts. Random bored users
1014                 # could conceivably have the same effect, especially if cur is locked for long periods.
1015                 if( $wgDBtransactions ) {
1016                         $dbw->query( 'BEGIN', $fname );
1017                 } else {
1018                         $userAbort = ignore_user_abort( true );
1019                 }
1020
1021                 $oldtext = $this->getContent( true );
1022
1023                 if ( 0 != strcmp( $text, $oldtext ) ) {
1024                         $this->mCountAdjustment = $this->isCountable( $text )
1025                           - $this->isCountable( $oldtext );
1026                         $now = wfTimestampNow();
1027                         $won = wfInvertTimestamp( $now );
1028
1029                         # First update the cur row
1030                         $dbw->update( 'cur',
1031                                 array( /* SET */
1032                                         'cur_text' => $text,
1033                                         'cur_comment' => $summary,
1034                                         'cur_minor_edit' => $me2,
1035                                         'cur_user' => $wgUser->getID(),
1036                                         'cur_timestamp' => $dbw->timestamp($now),
1037                                         'cur_user_text' => $wgUser->getName(),
1038                                         'cur_is_redirect' => $redir,
1039                                         'cur_is_new' => 0,
1040                                         'cur_touched' => $dbw->timestamp($now),
1041                                         'inverse_timestamp' => $won
1042                                 ), array( /* WHERE */
1043                                         'cur_id' => $this->getID(),
1044                                         'cur_timestamp' => $dbw->timestamp($this->getTimestamp())
1045                                 ), $fname
1046                         );
1047
1048                         if( $dbw->affectedRows() == 0 ) {
1049                                 /* Belated edit conflict! Run away!! */
1050                                 $good = false;
1051                         } else {
1052                                 # Now insert the previous revision into old
1053
1054                                 # This overwrites $oldtext if revision compression is on
1055                                 $flags = Article::compressRevisionText( $oldtext );
1056
1057                                 $dbw->insert( 'old',
1058                                         array(
1059                                                 'old_id' => $dbw->nextSequenceValue( 'old_old_id_seq' ),
1060                                                 'old_namespace' => $this->mTitle->getNamespace(),
1061                                                 'old_title' => $this->mTitle->getDBkey(),
1062                                                 'old_text' => $oldtext,
1063                                                 'old_comment' => $this->getComment(),
1064                                                 'old_user' => $this->getUser(),
1065                                                 'old_user_text' => $this->getUserText(),
1066                                                 'old_timestamp' => $dbw->timestamp($this->getTimestamp()),
1067                                                 'old_minor_edit' => $me1,
1068                                                 'inverse_timestamp' => wfInvertTimestamp( $this->getTimestamp() ),
1069                                                 'old_flags' => $flags,
1070                                         ), $fname
1071                                 );
1072
1073                                 $oldid = $dbw->insertId();
1074
1075                                 $bot = (int)($wgUser->isBot() || $forceBot);
1076                                 RecentChange::notifyEdit( $now, $this->mTitle, $me2, $wgUser, $summary,
1077                                         $oldid, $this->getTimestamp(), $bot );
1078                                 Article::onArticleEdit( $this->mTitle );
1079                         }
1080                 }
1081
1082                 if( $wgDBtransactions ) {
1083                         $dbw->query( 'COMMIT', $fname );
1084                 } else {
1085                         ignore_user_abort( $userAbort );
1086                 }
1087
1088                 if ( $good ) {
1089                 if ($watchthis) {
1090                         if (!$this->mTitle->userIsWatching()) $this->watch();
1091                 } else {
1092                         if ( $this->mTitle->userIsWatching() ) {
1093                                 $this->unwatch();
1094                         }
1095                 }
1096                 # standard deferred updates
1097                 $this->editUpdates( $text );
1098
1099
1100                 $urls = array();
1101                 # Template namespace
1102                 # Purge all articles linking here
1103                 if ( $this->mTitle->getNamespace() == NS_TEMPLATE) {
1104                         $titles = $this->mTitle->getLinksTo();
1105                         Title::touchArray( $titles );
1106                         if ( $wgUseSquid ) {
1107                                         foreach ( $titles as $title ) {
1108                                                 $urls[] = $title->getInternalURL();
1109                                         }
1110                         }
1111                 }
1112
1113                 # Squid updates
1114                 if ( $wgUseSquid ) {
1115                         $urls = array_merge( $urls, $this->mTitle->getSquidURLs() );
1116                         $u = new SquidUpdate( $urls );
1117                         $u->doUpdate();
1118                 }
1119
1120                 $this->showArticle( $text, wfMsg( 'updated' ), $sectionanchor );
1121                 }
1122                 return $good;
1123         }
1124
1125         /**
1126          * After we've either updated or inserted the article, update
1127          * the link tables and redirect to the new page.
1128          */
1129         function showArticle( $text, $subtitle , $sectionanchor = '' ) {
1130                 global $wgOut, $wgUser, $wgLinkCache;
1131
1132                 $wgLinkCache = new LinkCache();
1133                 # Select for update
1134                 $wgLinkCache->forUpdate( true );
1135
1136                 # Get old version of link table to allow incremental link updates
1137                 $wgLinkCache->preFill( $this->mTitle );
1138                 $wgLinkCache->clear();
1139
1140                 # Parse the text and replace links with placeholders
1141                 $wgOut = new OutputPage();
1142                 $wgOut->addWikiText( $text );
1143
1144                 # Look up the links in the DB and add them to the link cache
1145                 $wgOut->transformBuffer( RLH_FOR_UPDATE );
1146
1147                 if( $this->isRedirect( $text ) )
1148                         $r = 'redirect=no';
1149                 else
1150                         $r = '';
1151                 $wgOut->redirect( $this->mTitle->getFullURL( $r ).$sectionanchor );
1152         }
1153
1154         /**
1155          * Validate article
1156          * @todo document this function a bit more
1157          */
1158         function validate () {
1159                 global $wgOut, $wgUseValidation;
1160                 if( $wgUseValidation ) {
1161                         require_once ( 'SpecialValidate.php' ) ;
1162                         $wgOut->setPagetitle( wfMsg( 'validate' ) . ': ' . $this->mTitle->getPrefixedText() );
1163                         $wgOut->setRobotpolicy( 'noindex,follow' );
1164                         if( $this->mTitle->getNamespace() != 0 ) {
1165                                 $wgOut->addHTML( wfMsg( 'val_validate_article_namespace_only' ) );
1166                                 return;
1167                         }
1168                         $v = new Validation;
1169                         $v->validate_form( $this->mTitle->getDBkey() );
1170                 } else {
1171                         $wgOut->errorpage( 'nosuchaction', 'nosuchactiontext' );
1172                 }
1173         }
1174
1175         /**
1176          * Mark this particular edit as patrolled
1177          */
1178         function markpatrolled() {
1179                 global $wgOut, $wgRequest, $wgOnlySysopsCanPatrol, $wgUseRCPatrol, $wgUser;
1180                 $wgOut->setRobotpolicy( 'noindex,follow' );
1181
1182                 if ( !$wgUseRCPatrol )
1183                 {
1184                         $wgOut->errorpage( 'rcpatroldisabled', 'rcpatroldisabledtext' );
1185                         return;
1186                 }
1187                 if ( $wgUser->getID() == 0 )
1188                 {
1189                         $wgOut->loginToUse();
1190                         return;
1191                 }
1192                 if ( $wgOnlySysopsCanPatrol && !$wgUser->isAllowed('patrol') )
1193                 {
1194                         $wgOut->sysopRequired();
1195                         return;
1196                 }
1197                 $rcid = $wgRequest->getVal( 'rcid' );
1198                 if ( !is_null ( $rcid ) )
1199                 {
1200                         RecentChange::markPatrolled( $rcid );
1201                         $wgOut->setPagetitle( wfMsg( 'markedaspatrolled' ) );
1202                         $wgOut->addWikiText( wfMsg( 'markedaspatrolledtext' ) );
1203                         $wgOut->returnToMain( true, $this->mTitle->getPrefixedText() );
1204                 }
1205                 else
1206                 {
1207                         $wgOut->errorpage( 'markedaspatrollederror', 'markedaspatrollederrortext' );
1208                 }
1209         }
1210
1211
1212         /**
1213          * Add or remove this page to my watchlist based on value of $add
1214          */
1215         function watch( $add = true ) {
1216                 global $wgUser, $wgOut;
1217                 global $wgDeferredUpdateList;
1218
1219                 if ( 0 == $wgUser->getID() ) {
1220                         $wgOut->errorpage( 'watchnologin', 'watchnologintext' );
1221                         return;
1222                 }
1223                 if ( wfReadOnly() ) {
1224                         $wgOut->readOnlyPage();
1225                         return;
1226                 }
1227                 if( $add )
1228                         $wgUser->addWatch( $this->mTitle );
1229                 else
1230                         $wgUser->removeWatch( $this->mTitle );
1231
1232                 $wgOut->setPagetitle( wfMsg( $add ? 'addedwatch' : 'removedwatch' ) );
1233                 $wgOut->setRobotpolicy( 'noindex,follow' );
1234
1235                 $sk = $wgUser->getSkin() ;
1236                 $link = $this->mTitle->getPrefixedText();
1237
1238                 if($add)
1239                         $text = wfMsg( 'addedwatchtext', $link );
1240                 else
1241                         $text = wfMsg( 'removedwatchtext', $link );
1242                 $wgOut->addWikiText( $text );
1243
1244                 $up = new UserUpdate();
1245                 array_push( $wgDeferredUpdateList, $up );
1246
1247                 $wgOut->returnToMain( true, $this->mTitle->getPrefixedText() );
1248         }
1249
1250         /**
1251          * Stop watching a page, it act just like a call to watch(false)
1252          */
1253         function unwatch() {
1254                 $this->watch( false );
1255         }
1256
1257         /**
1258          * protect a page
1259          */
1260         function protect( $limit = 'sysop' ) {
1261                 global $wgUser, $wgOut, $wgRequest;
1262
1263                 if ( ! $wgUser->isAllowed('protect') ) {
1264                         $wgOut->sysopRequired();
1265                         return;
1266                 }
1267                 if ( wfReadOnly() ) {
1268                         $wgOut->readOnlyPage();
1269                         return;
1270                 }
1271                 $id = $this->mTitle->getArticleID();
1272                 if ( 0 == $id ) {
1273                         $wgOut->fatalError( wfMsg( 'badarticleerror' ) );
1274                         return;
1275                 }
1276
1277                 $confirm = $wgRequest->getBool( 'wpConfirmProtect' ) && $wgRequest->wasPosted();
1278                 $reason = $wgRequest->getText( 'wpReasonProtect' );
1279
1280                 if ( $confirm ) {
1281                         $dbw =& wfGetDB( DB_MASTER );
1282                         $dbw->update( 'cur',
1283                                 array( /* SET */
1284                                         'cur_touched' => $dbw->timestamp(),
1285                                         'cur_restrictions' => (string)$limit
1286                                 ), array( /* WHERE */
1287                                         'cur_id' => $id
1288                                 ), 'Article::protect'
1289                         );
1290
1291                         $log = new LogPage( 'protect' );
1292                         if ( $limit === '' ) {
1293                                         $log->addEntry( 'unprotect', $this->mTitle, $reason );
1294                         } else {
1295                                         $log->addEntry( 'protect', $this->mTitle, $reason );
1296                         }
1297                         $wgOut->redirect( $this->mTitle->getFullURL() );
1298                         return;
1299                 } else {
1300                         $reason = htmlspecialchars( wfMsg( 'protectreason' ) );
1301                         return $this->confirmProtect( '', $reason, $limit );
1302                 }
1303         }
1304
1305         /**
1306          * Output protection confirmation dialog
1307          */
1308         function confirmProtect( $par, $reason, $limit = 'sysop'  ) {
1309                 global $wgOut;
1310
1311                 wfDebug( "Article::confirmProtect\n" );
1312
1313                 $sub = htmlspecialchars( $this->mTitle->getPrefixedText() );
1314                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
1315
1316                 $check = '';
1317                 $protcom = '';
1318
1319                 if ( $limit === '' ) {
1320                         $wgOut->setPageTitle( wfMsg( 'confirmunprotect' ) );
1321                         $wgOut->setSubtitle( wfMsg( 'unprotectsub', $sub ) );
1322                         $wgOut->addWikiText( wfMsg( 'confirmunprotecttext' ) );
1323                         $check = htmlspecialchars( wfMsg( 'confirmunprotect' ) );
1324                         $protcom = htmlspecialchars( wfMsg( 'unprotectcomment' ) );
1325                         $formaction = $this->mTitle->escapeLocalURL( 'action=unprotect' . $par );
1326                 } else {
1327                         $wgOut->setPageTitle( wfMsg( 'confirmprotect' ) );
1328                         $wgOut->setSubtitle( wfMsg( 'protectsub', $sub ) );
1329                         $wgOut->addWikiText( wfMsg( 'confirmprotecttext' ) );
1330                         $check = htmlspecialchars( wfMsg( 'confirmprotect' ) );
1331                         $protcom = htmlspecialchars( wfMsg( 'protectcomment' ) );
1332                         $formaction = $this->mTitle->escapeLocalURL( 'action=protect' . $par );
1333                 }
1334
1335                 $confirm = htmlspecialchars( wfMsg( 'confirm' ) );
1336
1337                 $wgOut->addHTML( "
1338 <form id='protectconfirm' method='post' action=\"{$formaction}\">
1339         <table border='0'>
1340                 <tr>
1341                         <td align='right'>
1342                                 <label for='wpReasonProtect'>{$protcom}:</label>
1343                         </td>
1344                         <td align='left'>
1345                                 <input type='text' size='60' name='wpReasonProtect' id='wpReasonProtect' value=\"" . htmlspecialchars( $reason ) . "\" />
1346                         </td>
1347                 </tr>
1348                 <tr>
1349                         <td>&nbsp;</td>
1350                 </tr>
1351                 <tr>
1352                         <td align='right'>
1353                                 <input type='checkbox' name='wpConfirmProtect' value='1' id='wpConfirmProtect' />
1354                         </td>
1355                         <td>
1356                                 <label for='wpConfirmProtect'>{$check}</label>
1357                         </td>
1358                 </tr>
1359                 <tr>
1360                         <td>&nbsp;</td>
1361                         <td>
1362                                 <input type='submit' name='wpConfirmProtectB' value=\"{$confirm}\" />
1363                         </td>
1364                 </tr>
1365         </table>
1366 </form>\n" );
1367
1368                 $wgOut->returnToMain( false );
1369         }
1370
1371         /**
1372          * Unprotect the pages
1373          */
1374         function unprotect() {
1375                 return $this->protect( '' );
1376         }
1377
1378         /*
1379          * UI entry point for page deletion
1380          */
1381         function delete() {
1382                 global $wgUser, $wgOut, $wgMessageCache, $wgRequest;
1383                 $fname = 'Article::delete';
1384                 $confirm = $wgRequest->getBool( 'wpConfirm' ) && $wgRequest->wasPosted();
1385                 $reason = $wgRequest->getText( 'wpReason' );
1386
1387                 # This code desperately needs to be totally rewritten
1388
1389                 # Check permissions
1390                 if ( ( ! $wgUser->isAllowed('delete') ) ) {
1391                         $wgOut->sysopRequired();
1392                         return;
1393                 }
1394                 if ( wfReadOnly() ) {
1395                         $wgOut->readOnlyPage();
1396                         return;
1397                 }
1398
1399                 # Better double-check that it hasn't been deleted yet!
1400                 $wgOut->setPagetitle( wfMsg( 'confirmdelete' ) );
1401                 if ( ( '' == trim( $this->mTitle->getText() ) )
1402                   or ( $this->mTitle->getArticleId() == 0 ) ) {
1403                         $wgOut->fatalError( wfMsg( 'cannotdelete' ) );
1404                         return;
1405                 }
1406
1407                 if ( $confirm ) {
1408                         $this->doDelete( $reason );
1409                         return;
1410                 }
1411
1412                 # determine whether this page has earlier revisions
1413                 # and insert a warning if it does
1414                 # we select the text because it might be useful below
1415                 $dbr =& $this->getDB();
1416                 $ns = $this->mTitle->getNamespace();
1417                 $title = $this->mTitle->getDBkey();
1418                 $old = $dbr->selectRow( 'old',
1419                         array( 'old_text', 'old_flags' ),
1420                         array(
1421                                 'old_namespace' => $ns,
1422                                 'old_title' => $title,
1423                         ), $fname, $this->getSelectOptions( array( 'ORDER BY' => 'inverse_timestamp' ) )
1424                 );
1425
1426                 if( $old !== false && !$confirm ) {
1427                         $skin=$wgUser->getSkin();
1428                         $wgOut->addHTML('<b>'.wfMsg('historywarning'));
1429                         $wgOut->addHTML( $skin->historyLink() .'</b>');
1430                 }
1431
1432                 # Fetch cur_text
1433                 $s = $dbr->selectRow( 'cur',
1434                         array( 'cur_text' ),
1435                         array(
1436                                 'cur_namespace' => $ns,
1437                                 'cur_title' => $title,
1438                         ), $fname, $this->getSelectOptions()
1439                 );
1440
1441                 if( $s !== false ) {
1442                         # if this is a mini-text, we can paste part of it into the deletion reason
1443
1444                         #if this is empty, an earlier revision may contain "useful" text
1445                         $blanked = false;
1446                         if($s->cur_text != '') {
1447                                 $text=$s->cur_text;
1448                         } else {
1449                                 if($old) {
1450                                         $text = Article::getRevisionText( $old );
1451                                         $blanked = true;
1452                                 }
1453
1454                         }
1455
1456                         $length=strlen($text);
1457
1458                         # this should not happen, since it is not possible to store an empty, new
1459                         # page. Let's insert a standard text in case it does, though
1460                         if($length == 0 && $reason === '') {
1461                                 $reason = wfMsg('exblank');
1462                         }
1463
1464                         if($length < 500 && $reason === '') {
1465
1466                                 # comment field=255, let's grep the first 150 to have some user
1467                                 # space left
1468                                 $text=substr($text,0,150);
1469                                 # let's strip out newlines and HTML tags
1470                                 $text=preg_replace('/\"/',"'",$text);
1471                                 $text=preg_replace('/\</','&lt;',$text);
1472                                 $text=preg_replace('/\>/','&gt;',$text);
1473                                 $text=preg_replace("/[\n\r]/",'',$text);
1474                                 if(!$blanked) {
1475                                         $reason=wfMsg('excontent'). " '".$text;
1476                                 } else {
1477                                         $reason=wfMsg('exbeforeblank') . " '".$text;
1478                                 }
1479                                 if($length>150) { $reason .= '...'; } # we've only pasted part of the text
1480                                 $reason.="'";
1481                         }
1482                 }
1483
1484                 return $this->confirmDelete( '', $reason );
1485         }
1486
1487         /**
1488          * Output deletion confirmation dialog
1489          */
1490         function confirmDelete( $par, $reason ) {
1491                 global $wgOut;
1492
1493                 wfDebug( "Article::confirmDelete\n" );
1494
1495                 $sub = htmlspecialchars( $this->mTitle->getPrefixedText() );
1496                 $wgOut->setSubtitle( wfMsg( 'deletesub', $sub ) );
1497                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
1498                 $wgOut->addWikiText( wfMsg( 'confirmdeletetext' ) );
1499
1500                 $formaction = $this->mTitle->escapeLocalURL( 'action=delete' . $par );
1501
1502                 $confirm = htmlspecialchars( wfMsg( 'confirm' ) );
1503                 $check = htmlspecialchars( wfMsg( 'confirmcheck' ) );
1504                 $delcom = htmlspecialchars( wfMsg( 'deletecomment' ) );
1505
1506                 $wgOut->addHTML( "
1507 <form id='deleteconfirm' method='post' action=\"{$formaction}\">
1508         <table border='0'>
1509                 <tr>
1510                         <td align='right'>
1511                                 <label for='wpReason'>{$delcom}:</label>
1512                         </td>
1513                         <td align='left'>
1514                                 <input type='text' size='60' name='wpReason' id='wpReason' value=\"" . htmlspecialchars( $reason ) . "\" />
1515                         </td>
1516                 </tr>
1517                 <tr>
1518                         <td>&nbsp;</td>
1519                 </tr>
1520                 <tr>
1521                         <td align='right'>
1522                                 <input type='checkbox' name='wpConfirm' value='1' id='wpConfirm' />
1523                         </td>
1524                         <td>
1525                                 <label for='wpConfirm'>{$check}</label>
1526                         </td>
1527                 </tr>
1528                 <tr>
1529                         <td>&nbsp;</td>
1530                         <td>
1531                                 <input type='submit' name='wpConfirmB' value=\"{$confirm}\" />
1532                         </td>
1533                 </tr>
1534         </table>
1535 </form>\n" );
1536
1537                 $wgOut->returnToMain( false );
1538         }
1539
1540
1541         /**
1542          * Perform a deletion and output success or failure messages
1543          */
1544         function doDelete( $reason ) {
1545                 global $wgOut, $wgUser, $wgContLang;
1546                 $fname = 'Article::doDelete';
1547                 wfDebug( $fname."\n" );
1548
1549                 if ( $this->doDeleteArticle( $reason ) ) {
1550                         $deleted = $this->mTitle->getPrefixedText();
1551
1552                         $wgOut->setPagetitle( wfMsg( 'actioncomplete' ) );
1553                         $wgOut->setRobotpolicy( 'noindex,nofollow' );
1554
1555                         $sk = $wgUser->getSkin();
1556                         $loglink = $sk->makeKnownLink( $wgContLang->getNsText( NS_PROJECT ) .
1557                           ':' . wfMsgForContent( 'dellogpage' ), wfMsg( 'deletionlog' ) );
1558
1559                         $text = wfMsg( 'deletedtext', $deleted, $loglink );
1560
1561                         $wgOut->addHTML( '<p>' . $text . "</p>\n" );
1562                         $wgOut->returnToMain( false );
1563                 } else {
1564                         $wgOut->fatalError( wfMsg( 'cannotdelete' ) );
1565                 }
1566         }
1567
1568         /**
1569          * Back-end article deletion
1570          * Deletes the article with database consistency, writes logs, purges caches
1571          * Returns success
1572          */
1573         function doDeleteArticle( $reason ) {
1574                 global $wgUser;
1575                 global  $wgUseSquid, $wgDeferredUpdateList, $wgInternalServer;
1576
1577                 $fname = 'Article::doDeleteArticle';
1578                 wfDebug( $fname."\n" );
1579
1580                 $dbw =& wfGetDB( DB_MASTER );
1581                 $ns = $this->mTitle->getNamespace();
1582                 $t = $this->mTitle->getDBkey();
1583                 $id = $this->mTitle->getArticleID();
1584
1585                 if ( $t == '' || $id == 0 ) {
1586                         return false;
1587                 }
1588
1589                 $u = new SiteStatsUpdate( 0, 1, -$this->isCountable( $this->getContent( true ) ) );
1590                 array_push( $wgDeferredUpdateList, $u );
1591
1592                 $linksTo = $this->mTitle->getLinksTo();
1593
1594                 # Squid purging
1595                 if ( $wgUseSquid ) {
1596                         $urls = array(
1597                                 $this->mTitle->getInternalURL(),
1598                                 $this->mTitle->getInternalURL( 'history' )
1599                         );
1600                         foreach ( $linksTo as $linkTo ) {
1601                                 $urls[] = $linkTo->getInternalURL();
1602                         }
1603
1604                         $u = new SquidUpdate( $urls );
1605                         array_push( $wgDeferredUpdateList, $u );
1606
1607                 }
1608
1609                 # Client and file cache invalidation
1610                 Title::touchArray( $linksTo );
1611
1612                 # Move article and history to the "archive" table
1613                 $archiveTable = $dbw->tableName( 'archive' );
1614                 $oldTable = $dbw->tableName( 'old' );
1615                 $curTable = $dbw->tableName( 'cur' );
1616                 $recentchangesTable = $dbw->tableName( 'recentchanges' );
1617                 $linksTable = $dbw->tableName( 'links' );
1618                 $brokenlinksTable = $dbw->tableName( 'brokenlinks' );
1619
1620                 $dbw->insertSelect( 'archive', 'cur',
1621                         array(
1622                                 'ar_namespace' => 'cur_namespace',
1623                                 'ar_title' => 'cur_title',
1624                                 'ar_text' => 'cur_text',
1625                                 'ar_comment' => 'cur_comment',
1626                                 'ar_user' => 'cur_user',
1627                                 'ar_user_text' => 'cur_user_text',
1628                                 'ar_timestamp' => 'cur_timestamp',
1629                                 'ar_minor_edit' => 'cur_minor_edit',
1630                                 'ar_flags' => 0,
1631                         ), array(
1632                                 'cur_namespace' => $ns,
1633                                 'cur_title' => $t,
1634                         ), $fname
1635                 );
1636
1637                 $dbw->insertSelect( 'archive', 'old',
1638                         array(
1639                                 'ar_namespace' => 'old_namespace',
1640                                 'ar_title' => 'old_title',
1641                                 'ar_text' => 'old_text',
1642                                 'ar_comment' => 'old_comment',
1643                                 'ar_user' => 'old_user',
1644                                 'ar_user_text' => 'old_user_text',
1645                                 'ar_timestamp' => 'old_timestamp',
1646                                 'ar_minor_edit' => 'old_minor_edit',
1647                                 'ar_flags' => 'old_flags'
1648                         ), array(
1649                                 'old_namespace' => $ns,
1650                                 'old_title' => $t,
1651                         ), $fname
1652                 );
1653
1654                 # Now that it's safely backed up, delete it
1655
1656                 $dbw->delete( 'cur', array( 'cur_namespace' => $ns, 'cur_title' => $t ), $fname );
1657                 $dbw->delete( 'old', array( 'old_namespace' => $ns, 'old_title' => $t ), $fname );
1658                 $dbw->delete( 'recentchanges', array( 'rc_namespace' => $ns, 'rc_title' => $t ), $fname );
1659
1660                 # Finally, clean up the link tables
1661                 $t = $this->mTitle->getPrefixedDBkey();
1662
1663                 Article::onArticleDelete( $this->mTitle );
1664
1665                 # Insert broken links
1666                 $brokenLinks = array();
1667                 foreach ( $linksTo as $titleObj ) {
1668                         # Get article ID. Efficient because it was loaded into the cache by getLinksTo().
1669                         $linkID = $titleObj->getArticleID();
1670                         $brokenLinks[] = array( 'bl_from' => $linkID, 'bl_to' => $t );
1671                 }
1672                 $dbw->insert( 'brokenlinks', $brokenLinks, $fname, 'IGNORE' );
1673
1674                 # Delete live links
1675                 $dbw->delete( 'links', array( 'l_to' => $id ) );
1676                 $dbw->delete( 'links', array( 'l_from' => $id ) );
1677                 $dbw->delete( 'imagelinks', array( 'il_from' => $id ) );
1678                 $dbw->delete( 'brokenlinks', array( 'bl_from' => $id ) );
1679                 $dbw->delete( 'categorylinks', array( 'cl_from' => $id ) );
1680
1681                 # Log the deletion
1682                 $log = new LogPage( 'delete' );
1683                 $log->addEntry( 'delete', $this->mTitle, $reason );
1684
1685                 # Clear the cached article id so the interface doesn't act like we exist
1686                 $this->mTitle->resetArticleID( 0 );
1687                 $this->mTitle->mArticleID = 0;
1688                 return true;
1689         }
1690
1691         /**
1692          * Revert a modification
1693          */
1694         function rollback() {
1695                 global $wgUser, $wgOut, $wgRequest;
1696                 $fname = 'Article::rollback';
1697
1698                 if ( ! $wgUser->isAllowed('rollback') ) {
1699                         $wgOut->sysopRequired();
1700                         return;
1701                 }
1702                 if ( wfReadOnly() ) {
1703                         $wgOut->readOnlyPage( $this->getContent( true ) );
1704                         return;
1705                 }
1706                 $dbw =& wfGetDB( DB_MASTER );
1707
1708                 # Enhanced rollback, marks edits rc_bot=1
1709                 $bot = $wgRequest->getBool( 'bot' );
1710
1711                 # Replace all this user's current edits with the next one down
1712                 $tt = $this->mTitle->getDBKey();
1713                 $n = $this->mTitle->getNamespace();
1714
1715                 # Get the last editor, lock table exclusively
1716                 $s = $dbw->selectRow( 'cur',
1717                         array( 'cur_id','cur_user','cur_user_text','cur_comment' ),
1718                         array( 'cur_title' => $tt, 'cur_namespace' => $n ),
1719                         $fname, 'FOR UPDATE'
1720                 );
1721                 if( $s === false ) {
1722                         # Something wrong
1723                         $wgOut->addHTML( wfMsg( 'notanarticle' ) );
1724                         return;
1725                 }
1726                 $ut = $dbw->strencode( $s->cur_user_text );
1727                 $uid = $s->cur_user;
1728                 $pid = $s->cur_id;
1729
1730                 $from = str_replace( '_', ' ', $wgRequest->getVal( 'from' ) );
1731                 if( $from != $s->cur_user_text ) {
1732                         $wgOut->setPageTitle(wfmsg('rollbackfailed'));
1733                         $wgOut->addWikiText( wfMsg( 'alreadyrolled',
1734                                 htmlspecialchars( $this->mTitle->getPrefixedText()),
1735                                 htmlspecialchars( $from ),
1736                                 htmlspecialchars( $s->cur_user_text ) ) );
1737                         if($s->cur_comment != '') {
1738                                 $wgOut->addHTML(
1739                                         wfMsg('editcomment',
1740                                         htmlspecialchars( $s->cur_comment ) ) );
1741                         }
1742                         return;
1743                 }
1744
1745                 # Get the last edit not by this guy
1746                 $s = $dbw->selectRow( 'old',
1747                         array( 'old_text','old_user','old_user_text','old_timestamp','old_flags' ),
1748                         array(
1749                                 'old_namespace' => $n,
1750                                 'old_title' => $tt,
1751                                 "old_user <> {$uid} OR old_user_text <> '{$ut}'"
1752                         ), $fname, array( 'FOR UPDATE', 'USE INDEX' => 'name_title_timestamp' )
1753                 );
1754                 if( $s === false ) {
1755                         # Something wrong
1756                         $wgOut->setPageTitle(wfMsg('rollbackfailed'));
1757                         $wgOut->addHTML( wfMsg( 'cantrollback' ) );
1758                         return;
1759                 }
1760
1761                 if ( $bot ) {
1762                         # Mark all reverted edits as bot
1763                         $dbw->update( 'recentchanges',
1764                                 array( /* SET */
1765                                         'rc_bot' => 1
1766                                 ), array( /* WHERE */
1767                                         'rc_user' => $uid,
1768                                         "rc_timestamp > '{$s->old_timestamp}'",
1769                                 ), $fname
1770                         );
1771                 }
1772
1773                 # Save it!
1774                 $newcomment = wfMsg( 'revertpage', $s->old_user_text, $from );
1775                 $wgOut->setPagetitle( wfMsg( 'actioncomplete' ) );
1776                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
1777                 $wgOut->addHTML( '<h2>' . htmlspecialchars( $newcomment ) . "</h2>\n<hr />\n" );
1778                 $this->updateArticle( Article::getRevisionText( $s ), $newcomment, 1, $this->mTitle->userIsWatching(), $bot );
1779                 Article::onArticleEdit( $this->mTitle );
1780                 $wgOut->returnToMain( false );
1781         }
1782
1783
1784         /**
1785          * Do standard deferred updates after page view
1786          * @private
1787          */
1788         function viewUpdates() {
1789                 global $wgDeferredUpdateList;
1790                 if ( 0 != $this->getID() ) {
1791                         global $wgDisableCounters;
1792                         if( !$wgDisableCounters ) {
1793                                 Article::incViewCount( $this->getID() );
1794                                 $u = new SiteStatsUpdate( 1, 0, 0 );
1795                                 array_push( $wgDeferredUpdateList, $u );
1796                         }
1797                 }
1798                 $u = new UserTalkUpdate( 0, $this->mTitle->getNamespace(),
1799                   $this->mTitle->getDBkey() );
1800                 array_push( $wgDeferredUpdateList, $u );
1801         }
1802
1803         /**
1804          * Do standard deferred updates after page edit.
1805          * Every 1000th edit, prune the recent changes table.
1806          * @private
1807          * @param string $text
1808          */
1809         function editUpdates( $text ) {
1810                 global $wgDeferredUpdateList, $wgDBname, $wgMemc;
1811                 global $wgMessageCache;
1812
1813                 wfSeedRandom();
1814                 if ( 0 == mt_rand( 0, 999 ) ) {
1815                         $dbw =& wfGetDB( DB_MASTER );
1816                         $cutoff = $dbw->timestamp( time() - ( 7 * 86400 ) );
1817                         $sql = "DELETE FROM recentchanges WHERE rc_timestamp < '{$cutoff}'";
1818                         $dbw->query( $sql );
1819                 }
1820                 $id = $this->getID();
1821                 $title = $this->mTitle->getPrefixedDBkey();
1822                 $shortTitle = $this->mTitle->getDBkey();
1823
1824                 $adj = $this->mCountAdjustment;
1825
1826                 if ( 0 != $id ) {
1827                         $u = new LinksUpdate( $id, $title );
1828                         array_push( $wgDeferredUpdateList, $u );
1829                         $u = new SiteStatsUpdate( 0, 1, $adj );
1830                         array_push( $wgDeferredUpdateList, $u );
1831                         $u = new SearchUpdate( $id, $title, $text );
1832                         array_push( $wgDeferredUpdateList, $u );
1833
1834                         $u = new UserTalkUpdate( 1, $this->mTitle->getNamespace(), $shortTitle );
1835                         array_push( $wgDeferredUpdateList, $u );
1836
1837                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
1838                                 $wgMessageCache->replace( $shortTitle, $text );
1839                         }
1840                 }
1841         }
1842
1843         /**
1844          * @todo document this function
1845          * @private
1846          * @param string $oldid         Revision ID of this article revision
1847          */
1848         function setOldSubtitle( $oldid=0 ) {
1849                 global $wgLang, $wgOut, $wgUser;
1850
1851                 $td = $wgLang->timeanddate( $this->mTimestamp, true );
1852                 $sk = $wgUser->getSkin();
1853                 $lnk = $sk->makeKnownLinkObj ( $this->mTitle, wfMsg( 'currentrevisionlink' ) );
1854                 $prevlink = $sk->makeKnownLinkObj( $this->mTitle, wfMsg( 'previousrevision' ), 'direction=prev&oldid='.$oldid );
1855                 $nextlink = $sk->makeKnownLinkObj( $this->mTitle, wfMsg( 'nextrevision' ), 'direction=next&oldid='.$oldid );
1856                 $r = wfMsg( 'revisionasofwithlink', $td, $lnk, $prevlink, $nextlink );
1857                 $wgOut->setSubtitle( $r );
1858         }
1859
1860         /**
1861          * This function is called right before saving the wikitext,
1862          * so we can do things like signatures and links-in-context.
1863          *
1864          * @param string $text
1865          */
1866         function preSaveTransform( $text ) {
1867                 global $wgParser, $wgUser;
1868                 return $wgParser->preSaveTransform( $text, $this->mTitle, $wgUser, ParserOptions::newFromUser( $wgUser ) );
1869         }
1870
1871         /* Caching functions */
1872
1873         /**
1874          * checkLastModified returns true if it has taken care of all
1875          * output to the client that is necessary for this request.
1876          * (that is, it has sent a cached version of the page)
1877          */
1878         function tryFileCache() {
1879                 static $called = false;
1880                 if( $called ) {
1881                         wfDebug( " tryFileCache() -- called twice!?\n" );
1882                         return;
1883                 }
1884                 $called = true;
1885                 if($this->isFileCacheable()) {
1886                         $touched = $this->mTouched;
1887                         if( $this->mTitle->getPrefixedDBkey() == wfMsg( 'mainpage' ) ) {
1888                                 # Expire the main page quicker
1889                                 $expire = wfUnix2Timestamp( time() - 3600 );
1890                                 $touched = max( $expire, $touched );
1891                         }
1892                         $cache = new CacheManager( $this->mTitle );
1893                         if($cache->isFileCacheGood( $touched )) {
1894                                 global $wgOut;
1895                                 wfDebug( " tryFileCache() - about to load\n" );
1896                                 $cache->loadFromFileCache();
1897                                 return true;
1898                         } else {
1899                                 wfDebug( " tryFileCache() - starting buffer\n" );
1900                                 ob_start( array(&$cache, 'saveToFileCache' ) );
1901                         }
1902                 } else {
1903                         wfDebug( " tryFileCache() - not cacheable\n" );
1904                 }
1905         }
1906
1907         /**
1908          * Check if the page can be cached
1909          * @return bool
1910          */
1911         function isFileCacheable() {
1912                 global $wgUser, $wgUseFileCache, $wgShowIPinHeader, $wgRequest;
1913                 extract( $wgRequest->getValues( 'action', 'oldid', 'diff', 'redirect', 'printable' ) );
1914
1915                 return $wgUseFileCache
1916                         and (!$wgShowIPinHeader)
1917                         and ($this->getID() != 0)
1918                         and ($wgUser->getId() == 0)
1919                         and (!$wgUser->getNewtalk())
1920                         and ($this->mTitle->getNamespace() != NS_SPECIAL )
1921                         and (empty( $action ) || $action == 'view')
1922                         and (!isset($oldid))
1923                         and (!isset($diff))
1924                         and (!isset($redirect))
1925                         and (!isset($printable))
1926                         and (!$this->mRedirectedFrom);
1927         }
1928
1929         /**
1930          * Loads cur_touched and returns a value indicating if it should be used
1931          *
1932          */
1933         function checkTouched() {
1934                 $fname = 'Article::checkTouched';
1935                 $id = $this->getID();
1936                 $dbr =& $this->getDB();
1937                 $s = $dbr->selectRow( 'cur', array( 'cur_touched', 'cur_is_redirect' ),
1938                         array( 'cur_id' => $id ), $fname, $this->getSelectOptions() );
1939                 if( $s !== false ) {
1940                         $this->mTouched = wfTimestamp(TS_MW,$s->cur_touched);
1941                         return !$s->cur_is_redirect;
1942                 } else {
1943                         return false;
1944                 }
1945         }
1946
1947         /**
1948          * Edit an article without doing all that other stuff
1949          *
1950          * @param string $text text submitted
1951          * @param string $comment comment submitted
1952          * @param integer $minor whereas it's a minor modification
1953          */
1954         function quickEdit( $text, $comment = '', $minor = 0 ) {
1955                 global $wgUser;
1956                 $fname = 'Article::quickEdit';
1957                 wfProfileIn( $fname );
1958
1959                 $dbw =& wfGetDB( DB_MASTER );
1960                 $ns = $this->mTitle->getNamespace();
1961                 $dbkey = $this->mTitle->getDBkey();
1962                 $encDbKey = $dbw->strencode( $dbkey );
1963                 $timestamp = wfTimestampNow();
1964
1965                 # Save to history
1966                 $dbw->insertSelect( 'old', 'cur',
1967                         array(
1968                                 'old_namespace' => 'cur_namespace',
1969                                 'old_title' => 'cur_title',
1970                                 'old_text' => 'cur_text',
1971                                 'old_comment' => 'cur_comment',
1972                                 'old_user' => 'cur_user',
1973                                 'old_user_text' => 'cur_user_text',
1974                                 'old_timestamp' => 'cur_timestamp',
1975                                 'inverse_timestamp' => '99999999999999-cur_timestamp',
1976                         ), array(
1977                                 'cur_namespace' => $ns,
1978                                 'cur_title' => $dbkey,
1979                         ), $fname
1980                 );
1981
1982                 # Use the affected row count to determine if the article is new
1983                 $numRows = $dbw->affectedRows();
1984
1985                 # Make an array of fields to be inserted
1986                 $fields = array(
1987                         'cur_text' => $text,
1988                         'cur_timestamp' => $timestamp,
1989                         'cur_user' => $wgUser->getID(),
1990                         'cur_user_text' => $wgUser->getName(),
1991                         'inverse_timestamp' => wfInvertTimestamp( $timestamp ),
1992                         'cur_comment' => $comment,
1993                         'cur_is_redirect' => $this->isRedirect( $text ) ? 1 : 0,
1994                         'cur_minor_edit' => intval($minor),
1995                         'cur_touched' => $dbw->timestamp($timestamp),
1996                 );
1997
1998                 if ( $numRows ) {
1999                         # Update article
2000                         $fields['cur_is_new'] = 0;
2001                         $dbw->update( 'cur', $fields, array( 'cur_namespace' => $ns, 'cur_title' => $dbkey ), $fname );
2002                 } else {
2003                         # Insert new article
2004                         $fields['cur_is_new'] = 1;
2005                         $fields['cur_namespace'] = $ns;
2006                         $fields['cur_title'] = $dbkey;
2007                         $fields['cur_random'] = $rand = wfRandom();
2008                         $dbw->insert( 'cur', $fields, $fname );
2009                 }
2010                 wfProfileOut( $fname );
2011         }
2012
2013         /**
2014          * Used to increment the view counter
2015          *
2016          * @static
2017          * @param integer $id article id
2018          */
2019         function incViewCount( $id ) {
2020                 $id = intval( $id );
2021                 global $wgHitcounterUpdateFreq;
2022
2023                 $dbw =& wfGetDB( DB_MASTER );
2024                 $curTable = $dbw->tableName( 'cur' );
2025                 $hitcounterTable = $dbw->tableName( 'hitcounter' );
2026                 $acchitsTable = $dbw->tableName( 'acchits' );
2027
2028                 if( $wgHitcounterUpdateFreq <= 1 ){ //
2029                         $dbw->query( "UPDATE $curTable SET cur_counter = cur_counter + 1 WHERE cur_id = $id" );
2030                         return;
2031                 }
2032
2033                 # Not important enough to warrant an error page in case of failure
2034                 $oldignore = $dbw->ignoreErrors( true );
2035
2036                 $dbw->query( "INSERT INTO $hitcounterTable (hc_id) VALUES ({$id})" );
2037
2038                 $checkfreq = intval( $wgHitcounterUpdateFreq/25 + 1 );
2039                 if( (rand() % $checkfreq != 0) or ($dbw->lastErrno() != 0) ){
2040                         # Most of the time (or on SQL errors), skip row count check
2041                         $dbw->ignoreErrors( $oldignore );
2042                         return;
2043                 }
2044
2045                 $res = $dbw->query("SELECT COUNT(*) as n FROM $hitcounterTable");
2046                 $row = $dbw->fetchObject( $res );
2047                 $rown = intval( $row->n );
2048                 if( $rown >= $wgHitcounterUpdateFreq ){
2049                         wfProfileIn( 'Article::incViewCount-collect' );
2050                         $old_user_abort = ignore_user_abort( true );
2051
2052                         $dbw->query("LOCK TABLES $hitcounterTable WRITE");
2053                         $dbw->query("CREATE TEMPORARY TABLE $acchitsTable TYPE=HEAP ".
2054                                 "SELECT hc_id,COUNT(*) AS hc_n FROM $hitcounterTable ".
2055                                 'GROUP BY hc_id');
2056                         $dbw->query("DELETE FROM $hitcounterTable");
2057                         $dbw->query('UNLOCK TABLES');
2058                         $dbw->query("UPDATE $curTable,$acchitsTable SET cur_counter=cur_counter + hc_n ".
2059                                 'WHERE cur_id = hc_id');
2060                         $dbw->query("DROP TABLE $acchitsTable");
2061
2062                         ignore_user_abort( $old_user_abort );
2063                         wfProfileOut( 'Article::incViewCount-collect' );
2064                 }
2065                 $dbw->ignoreErrors( $oldignore );
2066         }
2067
2068         /**#@+
2069          * The onArticle*() functions are supposed to be a kind of hooks
2070          * which should be called whenever any of the specified actions
2071          * are done.
2072          *
2073          * This is a good place to put code to clear caches, for instance.
2074          *
2075          * This is called on page move and undelete, as well as edit
2076          * @static
2077          * @param $title_obj a title object
2078          */
2079
2080         function onArticleCreate($title_obj) {
2081                 global $wgUseSquid, $wgDeferredUpdateList;
2082
2083                 $titles = $title_obj->getBrokenLinksTo();
2084
2085                 # Purge squid
2086                 if ( $wgUseSquid ) {
2087                         $urls = $title_obj->getSquidURLs();
2088                         foreach ( $titles as $linkTitle ) {
2089                                 $urls[] = $linkTitle->getInternalURL();
2090                         }
2091                         $u = new SquidUpdate( $urls );
2092                         array_push( $wgDeferredUpdateList, $u );
2093                 }
2094
2095                 # Clear persistent link cache
2096                 LinkCache::linksccClearBrokenLinksTo( $title_obj->getPrefixedDBkey() );
2097         }
2098
2099         function onArticleDelete($title_obj) {
2100                 LinkCache::linksccClearLinksTo( $title_obj->getArticleID() );
2101         }
2102         function onArticleEdit($title_obj) {
2103                 LinkCache::linksccClearPage( $title_obj->getArticleID() );
2104         }
2105         /**#@-*/
2106
2107         /**
2108          * Info about this page
2109          */
2110         function info() {
2111                 global $wgUser, $wgTitle, $wgOut, $wgAllowPageInfo;
2112                 $fname = 'Article::info';
2113
2114                 if ( !$wgAllowPageInfo ) {
2115                         $wgOut->errorpage( 'nosuchaction', 'nosuchactiontext' );
2116                         return;
2117                 }
2118
2119                 $dbr =& $this->getDB();
2120
2121                 $basenamespace = $wgTitle->getNamespace() & (~1);
2122                 $cur_clause = array( 'cur_title' => $wgTitle->getDBkey(), 'cur_namespace' => $basenamespace );
2123                 $old_clause = array( 'old_title' => $wgTitle->getDBkey(), 'old_namespace' => $basenamespace );
2124                 $wl_clause  = array( 'wl_title' => $wgTitle->getDBkey(), 'wl_namespace' => $basenamespace );
2125                 $fullTitle = $wgTitle->makeName($basenamespace, $wgTitle->getDBKey());
2126                 $wgOut->setPagetitle(  $fullTitle );
2127                 $wgOut->setSubtitle( wfMsg( 'infosubtitle' ));
2128
2129                 # first, see if the page exists at all.
2130                 $exists = $dbr->selectField( 'cur', 'COUNT(*)', $cur_clause, $fname, $this->getSelectOptions() );
2131                 if ($exists < 1) {
2132                         $wgOut->addHTML( wfMsg('noarticletext') );
2133                 } else {
2134                         $numwatchers = $dbr->selectField( 'watchlist', 'COUNT(*)', $wl_clause, $fname,
2135                                 $this->getSelectOptions() );
2136                         $wgOut->addHTML( "<ul><li>" . wfMsg("numwatchers", $numwatchers) . '</li>' );
2137                         $old = $dbr->selectField( 'old', 'COUNT(*)', $old_clause, $fname, $this->getSelectOptions() );
2138                         $wgOut->addHTML( "<li>" . wfMsg('numedits', $old + 1) . '</li>');
2139
2140                         # to find number of distinct authors, we need to do some
2141                         # funny stuff because of the cur/old table split:
2142                         # - first, find the name of the 'cur' author
2143                         # - then, find the number of *other* authors in 'old'
2144
2145                         # find 'cur' author
2146                         $cur_author = $dbr->selectField( 'cur', 'cur_user_text', $cur_clause, $fname,
2147                                 $this->getSelectOptions() );
2148
2149                         # find number of 'old' authors excluding 'cur' author
2150                         $authors = $dbr->selectField( 'old', 'COUNT(DISTINCT old_user_text)',
2151                                 $old_clause + array( 'old_user_text<>' . $dbr->addQuotes( $cur_author ) ), $fname,
2152                                 $this->getSelectOptions() ) + 1;
2153
2154                         # now for the Talk page ...
2155                         $cur_clause = array( 'cur_title' => $wgTitle->getDBkey(), 'cur_namespace' => $basenamespace+1 );
2156                         $old_clause = array( 'old_title' => $wgTitle->getDBkey(), 'old_namespace' => $basenamespace+1 );
2157
2158                         # does it exist?
2159                         $exists = $dbr->selectField( 'cur', 'COUNT(*)', $cur_clause, $fname, $this->getSelectOptions() );
2160
2161                         # number of edits
2162                         if ($exists > 0) {
2163                                 $old = $dbr->selectField( 'old', 'COUNT(*)', $old_clause, $fname, $this->getSelectOptions() );
2164                                 $wgOut->addHTML( '<li>' . wfMsg("numtalkedits", $old + 1) . '</li>');
2165                         }
2166                         $wgOut->addHTML( '<li>' . wfMsg("numauthors", $authors) . '</li>' );
2167
2168                         # number of authors
2169                         if ($exists > 0) {
2170                                 $cur_author = $dbr->selectField( 'cur', 'cur_user_text', $cur_clause, $fname,
2171                                         $this->getSelectOptions() );
2172                                 $authors = $dbr->selectField( 'cur', 'COUNT(DISTINCT old_user_text)',
2173                                         $old_clause + array( 'old_user_text<>' . $dbr->addQuotes( $cur_author ) ),
2174                                         $fname, $this->getSelectOptions() );
2175
2176                                 $wgOut->addHTML( '<li>' . wfMsg('numtalkauthors', $authors) . '</li></ul>' );
2177                         }
2178                 }
2179         }
2180 }
2181
2182 ?>