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->loadRestrictions( $s->cur_restrictions );
 411                 } else { # oldid set, retrieve historical version
 412                         $s = $dbr->selectRow( 'old', $this->getOldContentFields(), array( 'old_id' => $oldid ),
 413                                 $fname, $this->getSelectOptions() );
 414                         if ( $s === false ) {
 415                                 return;
 416                         }
 417
 418                         if( $this->mTitle->getNamespace() != $s->old_namespace ||
 419                                 $this->mTitle->getDBkey() != $s->old_title ) {
 420                                 $oldTitle = Title::makeTitle( $s->old_namesapce, $s->old_title );
 421                                 $this->mTitle = $oldTitle;
 422                                 $wgTitle = $oldTitle;
 423                         }
 424                         $this->mContent = Article::getRevisionText( $s );
 425                         $this->mUser = $s->old_user;
 426                         $this->mUserText = $s->old_user_text;
 427                         $this->mComment = $s->old_comment;
 428                         $this->mCounter = 0;
 429                         $this->mTimestamp = wfTimestamp(TS_MW,$s->old_timestamp);
 430                 }
 431                 $this->mContentLoaded = true;
 432                 return $this->mContent;
 433         }
 434
 435         /**
 436          * Gets the article text without using so many damn globals
 437          * Returns false on error
 438          *
 439          * @param integer $oldid
 440          */
 441         function getContentWithoutUsingSoManyDamnGlobals( $oldid = 0, $noredir = false ) {
 442                 if ( $this->mContentLoaded ) {
 443                         return $this->mContent;
 444                 }
 445                 $this->mContent = false;
 446
 447                 $fname = 'Article::getContentWithout';
 448                 $dbr =& $this->getDB();
 449
 450                 if ( ! $oldid ) {       # Retrieve current version
 451                         $id = $this->getID();
 452                         if ( 0 == $id ) {
 453                                 return false;
 454                         }
 455
 456                         $s = $dbr->selectRow( 'cur', $this->getCurContentFields(), array( 'cur_id' => $id ),
 457                                 $fname, $this->getSelectOptions() );
 458                         if ( $s === false ) {
 459                                 return false;
 460                         }
 461
 462                         # If we got a redirect, follow it (unless we've been told
 463                         # not to by either the function parameter or the query
 464                         if ( !$noredir ) {
 465                                 $rt = Title::newFromRedirect( $s->cur_text );
 466                                 if( $rt &&  $rt->getInterwiki() == '' && $rt->getNamespace() != NS_SPECIAL ) {
 467                                         $rid = $rt->getArticleID();
 468                                         if ( 0 != $rid ) {
 469                                                 $redirRow = $dbr->selectRow( 'cur', $this->getCurContentFields(),
 470                                                         array( 'cur_id' => $rid ), $fname, $this->getSelectOptions() );
 471
 472                                                 if ( $redirRow !== false ) {
 473                                                         $this->mRedirectedFrom = $this->mTitle->getPrefixedText();
 474                                                         $this->mTitle = $rt;
 475                                                         $s = $redirRow;
 476                                                 }
 477                                         }
 478                                 }
 479                         }
 480
 481                         $this->mContent = $s->cur_text;
 482                         $this->mUser = $s->cur_user;
 483                         $this->mUserText = $s->cur_user_text;
 484                         $this->mComment = $s->cur_comment;
 485                         $this->mCounter = $s->cur_counter;
 486                         $this->mTimestamp = wfTimestamp(TS_MW,$s->cur_timestamp);
 487                         $this->mTouched = wfTimestamp(TS_MW,$s->cur_touched);
 488                         $this->mTitle->loadRestrictions( $s->cur_restrictions );
 489                 } else { # oldid set, retrieve historical version
 490                         $s = $dbr->selectRow( 'old', $this->getOldContentFields(), array( 'old_id' => $oldid ),
 491                                 $fname, $this->getSelectOptions() );
 492                         if ( $s === false ) {
 493                                 return false;
 494                         }
 495                         $this->mContent = Article::getRevisionText( $s );
 496                         $this->mUser = $s->old_user;
 497                         $this->mUserText = $s->old_user_text;
 498                         $this->mComment = $s->old_comment;
 499                         $this->mCounter = 0;
 500                         $this->mTimestamp = wfTimestamp(TS_MW,$s->old_timestamp);
 501                 }
 502                 $this->mContentLoaded = true;
 503                 return $this->mContent;
 504         }
 505
 506         /**
 507          * Read/write accessor to select FOR UPDATE
 508          */
 509         function forUpdate( $x = NULL ) {
 510                 return wfSetVar( $this->mForUpdate, $x );
 511         }
 512
 513         /**
 514          * Get the database which should be used for reads
 515          */
 516         function &getDB() {
 517                 if ( $this->mForUpdate ) {
 518                         return wfGetDB( DB_MASTER );
 519                 } else {
 520                         return wfGetDB( DB_SLAVE );
 521                 }
 522         }
 523
 524         /**
 525          * Get options for all SELECT statements
 526          * Can pass an option array, to which the class-wide options will be appended
 527          */
 528         function getSelectOptions( $options = '' ) {
 529                 if ( $this->mForUpdate ) {
 530                         if ( $options ) {
 531                                 $options[] = 'FOR UPDATE';
 532                         } else {
 533                                 $options = 'FOR UPDATE';
 534                         }
 535                 }
 536                 return $options;
 537         }
 538
 539         /**
 540          * Return the Article ID
 541          */
 542         function getID() {
 543                 if( $this->mTitle ) {
 544                         return $this->mTitle->getArticleID();
 545                 } else {
 546                         return 0;
 547                 }
 548         }
 549
 550         /**
 551          * Get the view count for this article
 552          */
 553         function getCount() {
 554                 if ( -1 == $this->mCounter ) {
 555                         $id = $this->getID();
 556                         $dbr =& $this->getDB();
 557                         $this->mCounter = $dbr->selectField( 'cur', 'cur_counter', 'cur_id='.$id,
 558                                 'Article::getCount', $this->getSelectOptions() );
 559                 }
 560                 return $this->mCounter;
 561         }
 562
 563         /**
 564          * Would the given text make this article a "good" article (i.e.,
 565          * suitable for including in the article count)?
 566          */
 567         function isCountable( $text ) {
 568                 global $wgUseCommaCount;
 569
 570                 if ( 0 != $this->mTitle->getNamespace() ) { return 0; }
 571                 if ( $this->isRedirect( $text ) ) { return 0; }
 572                 $token = ($wgUseCommaCount ? ',' : '[[' );
 573                 if ( false === strstr( $text, $token ) ) { return 0; }
 574                 return 1;
 575         }
 576
 577         /**
 578          * Tests if the article text represents a redirect
 579          */
 580         function isRedirect( $text = false ) {
 581                 if ( $text === false ) {
 582                         $this->loadContent();
 583                         $titleObj = Title::newFromRedirect( $this->mText );
 584                 } else {
 585                         $titleObj = Title::newFromRedirect( $text );
 586                 }
 587                 return $titleObj !== NULL;
 588         }
 589
 590         /**
 591          * Loads everything from cur except cur_text
 592          * This isn't necessary for all uses, so it's only done if needed.
 593          * @private
 594          */
 595         function loadLastEdit() {
 596                 global $wgOut;
 597                 if ( -1 != $this->mUser ) return;
 598
 599                 $fname = 'Article::loadLastEdit';
 600
 601                 $dbr =& $this->getDB();
 602                 $s = $dbr->selectRow( 'cur',
 603                   array( 'cur_user','cur_user_text','cur_timestamp', 'cur_comment','cur_minor_edit' ),
 604                   array( 'cur_id' => $this->getID() ), $fname, $this->getSelectOptions() );
 605
 606                 if ( $s !== false ) {
 607                         $this->mUser = $s->cur_user;
 608                         $this->mUserText = $s->cur_user_text;
 609                         $this->mTimestamp = wfTimestamp(TS_MW,$s->cur_timestamp);
 610                         $this->mComment = $s->cur_comment;
 611                         $this->mMinorEdit = $s->cur_minor_edit;
 612                 }
 613         }
 614
 615         function getTimestamp() {
 616                 $this->loadLastEdit();
 617                 return $this->mTimestamp;
 618         }
 619
 620         function getUser() {
 621                 $this->loadLastEdit();
 622                 return $this->mUser;
 623         }
 624
 625         function getUserText() {
 626                 $this->loadLastEdit();
 627                 return $this->mUserText;
 628         }
 629
 630         function getComment() {
 631                 $this->loadLastEdit();
 632                 return $this->mComment;
 633         }
 634
 635         function getMinorEdit() {
 636                 $this->loadLastEdit();
 637                 return $this->mMinorEdit;
 638         }
 639
 640         function getContributors($limit = 0, $offset = 0) {
 641                 $fname = 'Article::getContributors';
 642
 643                 # XXX: this is expensive; cache this info somewhere.
 644
 645                 $title = $this->mTitle;
 646                 $contribs = array();
 647                 $dbr =& $this->getDB();
 648                 $oldTable = $dbr->tableName( 'old' );
 649                 $userTable = $dbr->tableName( 'user' );
 650                 $encDBkey = $dbr->addQuotes( $title->getDBkey() );
 651                 $ns = $title->getNamespace();
 652                 $user = $this->getUser();
 653
 654                 $sql = "SELECT old_user, old_user_text, user_real_name, MAX(old_timestamp) as timestamp
 655                         FROM $oldTable LEFT JOIN $userTable ON old_user = user_id
 656                         WHERE old_namespace = $user
 657                         AND old_title = $encDBkey
 658                         AND old_user != $user
 659                         GROUP BY old_user, old_user_text, user_real_name
 660                         ORDER BY timestamp DESC";
 661
 662                 if ($limit > 0) { $sql .= ' LIMIT '.$limit; }
 663                 $sql .= ' '. $this->getSelectOptions();
 664
 665                 $res = $dbr->query($sql, $fname);
 666
 667                 while ( $line = $dbr->fetchObject( $res ) ) {
 668                         $contribs[] = array($line->old_user, $line->old_user_text, $line->user_real_name);
 669                 }
 670
 671                 $dbr->freeResult($res);
 672                 return $contribs;
 673         }
 674
 675         /**
 676          * This is the default action of the script: just view the page of
 677          * the given title.
 678         */
 679         function view() {
 680                 global $wgUser, $wgOut, $wgRequest, $wgOnlySysopsCanPatrol, $wgLang;
 681                 global $wgLinkCache, $IP, $wgEnableParserCache, $wgStylePath, $wgUseRCPatrol;
 682                 $sk = $wgUser->getSkin();
 683
 684                 $fname = 'Article::view';
 685                 wfProfileIn( $fname );
 686                 # Get variables from query string
 687                 $oldid = $this->getOldID();
 688                 $diff = $wgRequest->getVal( 'diff' );
 689                 $rcid = $wgRequest->getVal( 'rcid' );
 690
 691                 $wgOut->setArticleFlag( true );
 692                 $wgOut->setRobotpolicy( 'index,follow' );
 693                 # If we got diff and oldid in the query, we want to see a
 694                 # diff page instead of the article.
 695
 696                 if ( !is_null( $diff ) ) {
 697                         require_once( 'DifferenceEngine.php' );
 698                         $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
 699                         $de = new DifferenceEngine( $oldid, $diff, $rcid );
 700                         $de->showDiffPage();
 701                         if( $diff == 0 ) {
 702                                 # Run view updates for current revision only
 703                                 $this->viewUpdates();
 704                         }
 705                         wfProfileOut( $fname );
 706                         return;
 707                 }
 708                 if ( empty( $oldid ) && $this->checkTouched() ) {
 709                         if( $wgOut->checkLastModified( $this->mTouched ) ){
 710                                 wfProfileOut( $fname );
 711                                 return;
 712                         } else if ( $this->tryFileCache() ) {
 713                                 # tell wgOut that output is taken care of
 714                                 $wgOut->disable();
 715                                 $this->viewUpdates();
 716                                 wfProfileOut( $fname );
 717                                 return;
 718                         }
 719                 }
 720                 # Should the parser cache be used?
 721                 if ( $wgEnableParserCache && intval($wgUser->getOption( 'stubthreshold' )) == 0 && empty( $oldid ) ) {
 722                         $pcache = true;
 723                 } else {
 724                         $pcache = false;
 725                 }
 726
 727                 $outputDone = false;
 728                 if ( $pcache ) {
 729                         if ( $wgOut->tryParserCache( $this, $wgUser ) ) {
 730                                 $outputDone = true;
 731                         }
 732                 }
 733                 if ( !$outputDone ) {
 734                         $text = $this->getContent( false ); # May change mTitle by following a redirect
 735
 736                         # Another whitelist check in case oldid or redirects are altering the title
 737                         if ( !$this->mTitle->userCanRead() ) {
 738                                 $wgOut->loginToUse();
 739                                 $wgOut->output();
 740                                 exit;
 741                         }
 742
 743
 744                         # We're looking at an old revision
 745
 746                         if ( !empty( $oldid ) ) {
 747                                 $this->setOldSubtitle( $oldid );
 748                                 $wgOut->setRobotpolicy( 'noindex,follow' );
 749                         }
 750                         if ( '' != $this->mRedirectedFrom ) {
 751                                 $sk = $wgUser->getSkin();
 752                                 $redir = $sk->makeKnownLink( $this->mRedirectedFrom, '',
 753                                   'redirect=no' );
 754                                 $s = wfMsg( 'redirectedfrom', $redir );
 755                                 $wgOut->setSubtitle( $s );
 756
 757                                 # Can't cache redirects
 758                                 $pcache = false;
 759                         }
 760
 761                         # wrap user css and user js in pre and don't parse
 762                         # XXX: use $this->mTitle->usCssJsSubpage() when php is fixed/ a workaround is found
 763                         if (
 764                                 $this->mTitle->getNamespace() == NS_USER &&
 765                                 preg_match('/\\/[\\w]+\\.(css|js)$/', $this->mTitle->getDBkey())
 766                         ) {
 767                                 $wgOut->addWikiText( wfMsg('clearyourcache'));
 768                                 $wgOut->addHTML( '<pre>'.htmlspecialchars($this->mContent)."\n</pre>" );
 769                         } else if ( $rt = Title::newFromRedirect( $text ) ) {
 770                                 # Display redirect
 771                                 $imageUrl = $wgStylePath.'/common/images/redirect.png';
 772                                 $targetUrl = $rt->escapeLocalURL();
 773                                 $titleText = htmlspecialchars( $rt->getPrefixedText() );
 774                                 $link = $sk->makeLinkObj( $rt );
 775
 776                                 $wgOut->addHTML( '<img valign="center" src="'.$imageUrl.'" alt="#REDIRECT" />' .
 777                                   '<span class="redirectText">'.$link.'</span>' );
 778
 779                         } else if ( $pcache ) {
 780                                 # Display content and save to parser cache
 781                                 $wgOut->addPrimaryWikiText( $text, $this );
 782                         } else {
 783                                 # Display content, don't attempt to save to parser cache
 784                                 $wgOut->addWikiText( $text );
 785                         }
 786                 }
 787                 $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
 788                 # If we have been passed an &rcid= parameter, we want to give the user a
 789                 # chance to mark this new article as patrolled.
 790                 if ( $wgUseRCPatrol && !is_null ( $rcid ) && $rcid != 0 && $wgUser->getID() != 0 &&
 791                      ( $wgUser->isAllowed('patrol') || !$wgOnlySysopsCanPatrol ) )
 792                 {
 793                         $wgOut->addHTML( wfMsg ( 'markaspatrolledlink',
 794                                 $sk->makeKnownLinkObj ( $this->mTitle, wfMsg ( 'markaspatrolledtext' ),
 795                                         'action=markpatrolled&rcid='.$rcid )
 796                          ) );
 797                 }
 798
 799                 # Put link titles into the link cache
 800                 $wgOut->transformBuffer();
 801
 802                 # Add link titles as META keywords
 803                 $wgOut->addMetaTags() ;
 804
 805                 $this->viewUpdates();
 806                 wfProfileOut( $fname );
 807         }
 808
 809         /**
 810          * Theoretically we could defer these whole insert and update
 811          * functions for after display, but that's taking a big leap
 812          * of faith, and we want to be able to report database
 813          * errors at some point.
 814          * @private
 815          */
 816         function insertNewArticle( $text, $summary, $isminor, $watchthis ) {
 817                 global $wgOut, $wgUser;
 818                 global $wgUseSquid, $wgDeferredUpdateList, $wgInternalServer;
 819
 820                 $fname = 'Article::insertNewArticle';
 821
 822                 $this->mCountAdjustment = $this->isCountable( $text );
 823
 824                 $ns = $this->mTitle->getNamespace();
 825                 $ttl = $this->mTitle->getDBkey();
 826                 $text = $this->preSaveTransform( $text );
 827                 if ( $this->isRedirect( $text ) ) { $redir = 1; }
 828                 else { $redir = 0; }
 829
 830                 $now = wfTimestampNow();
 831                 $won = wfInvertTimestamp( $now );
 832                 wfSeedRandom();
 833                 $rand = wfRandom();
 834                 $dbw =& wfGetDB( DB_MASTER );
 835
 836                 $cur_id = $dbw->nextSequenceValue( 'cur_cur_id_seq' );
 837
 838                 $isminor = ( $isminor && $wgUser->getID() ) ? 1 : 0;
 839
 840                 $dbw->insert( 'cur', array(
 841                         'cur_id' => $cur_id,
 842                         'cur_namespace' => $ns,
 843                         'cur_title' => $ttl,
 844                         'cur_text' => $text,
 845                         'cur_comment' => $summary,
 846                         'cur_user' => $wgUser->getID(),
 847                         'cur_timestamp' => $dbw->timestamp($now),
 848                         'cur_minor_edit' => $isminor,
 849                         'cur_counter' => 0,
 850                         'cur_restrictions' => '',
 851                         'cur_user_text' => $wgUser->getName(),
 852                         'cur_is_redirect' => $redir,
 853                         'cur_is_new' => 1,
 854                         'cur_random' => $rand,
 855                         'cur_touched' => $dbw->timestamp($now),
 856                         'inverse_timestamp' => $won,
 857                 ), $fname );
 858
 859                 $newid = $dbw->insertId();
 860                 $this->mTitle->resetArticleID( $newid );
 861
 862                 Article::onArticleCreate( $this->mTitle );
 863                 RecentChange::notifyNew( $now, $this->mTitle, $isminor, $wgUser, $summary );
 864
 865                 if ($watchthis) {
 866                         if(!$this->mTitle->userIsWatching()) $this->watch();
 867                 } else {
 868                         if ( $this->mTitle->userIsWatching() ) {
 869                                 $this->unwatch();
 870                         }
 871                 }
 872
 873                 # The talk page isn't in the regular link tables, so we need to update manually:
 874                 $talkns = $ns ^ 1; # talk -> normal; normal -> talk
 875                 $dbw->update( 'cur', array('cur_touched' => $dbw->timestamp($now) ),
 876                         array(  'cur_namespace' => $talkns, 'cur_title' => $ttl ), $fname );
 877
 878                 # standard deferred updates
 879                 $this->editUpdates( $text );
 880
 881                 $this->showArticle( $text, wfMsg( 'newarticle' ) );
 882         }
 883
 884
 885         /**
 886          * Side effects: loads last edit if $edittime is NULL
 887          */
 888         function getTextOfLastEditWithSectionReplacedOrAdded($section, $text, $summary = '', $edittime = NULL) {
 889                 $fname = 'Article::getTextOfLastEditWithSectionReplacedOrAdded';
 890                 if(is_null($edittime)) {
 891                         $this->loadLastEdit();
 892                         $oldtext = $this->getContent( true );
 893                 } else {
 894                         $dbw =& wfGetDB( DB_MASTER );
 895                         $ns = $this->mTitle->getNamespace();
 896                         $title = $this->mTitle->getDBkey();
 897                         $obj = $dbw->selectRow( 'old',
 898                                 array( 'old_text','old_flags'),
 899                                 array( 'old_namespace' => $ns, 'old_title' => $title,
 900                                         'old_timestamp' => $dbw->timestamp($edittime)),
 901                                 $fname );
 902                         $oldtext = Article::getRevisionText( $obj );
 903                 }
 904                 if ($section != '') {
 905                         if($section=='new') {
 906                                 if($summary) $subject="== {$summary} ==\n\n";
 907                                 $text=$oldtext."\n\n".$subject.$text;
 908                         } else {
 909
 910                                 # strip NOWIKI etc. to avoid confusion (true-parameter causes HTML
 911                                 # comments to be stripped as well)
 912                                 $striparray=array();
 913                                 $parser=new Parser();
 914                                 $parser->mOutputType=OT_WIKI;
 915                                 $oldtext=$parser->strip($oldtext, $striparray, true);
 916
 917                                 # now that we can be sure that no pseudo-sections are in the source,
 918                                 # split it up
 919                                 # Unfortunately we can't simply do a preg_replace because that might
 920                                 # replace the wrong section, so we have to use the section counter instead
 921                                 $secs=preg_split('/(^=+.+?=+|^<h[1-6].*?' . '>.*?<\/h[1-6].*?' . '>)(?!\S)/mi',
 922                                   $oldtext,-1,PREG_SPLIT_DELIM_CAPTURE);
 923                                 $secs[$section*2]=$text."\n\n"; // replace with edited
 924
 925                                 # section 0 is top (intro) section
 926                                 if($section!=0) {
 927
 928                                         # headline of old section - we need to go through this section
 929                                         # to determine if there are any subsections that now need to
 930                                         # be erased, as the mother section has been replaced with
 931                                         # the text of all subsections.
 932                                         $headline=$secs[$section*2-1];
 933                                         preg_match( '/^(=+).+?=+|^<h([1-6]).*?' . '>.*?<\/h[1-6].*?' . '>(?!\S)/mi',$headline,$matches);
 934                                         $hlevel=$matches[1];
 935
 936                                         # determine headline level for wikimarkup headings
 937                                         if(strpos($hlevel,'=')!==false) {
 938                                                 $hlevel=strlen($hlevel);
 939                                         }
 940
 941                                         $secs[$section*2-1]=''; // erase old headline
 942                                         $count=$section+1;
 943                                         $break=false;
 944                                         while(!empty($secs[$count*2-1]) && !$break) {
 945
 946                                                 $subheadline=$secs[$count*2-1];
 947                                                 preg_match(
 948                                                  '/^(=+).+?=+|^<h([1-6]).*?' . '>.*?<\/h[1-6].*?' . '>(?!\S)/mi',$subheadline,$matches);
 949                                                 $subhlevel=$matches[1];
 950                                                 if(strpos($subhlevel,'=')!==false) {
 951                                                         $subhlevel=strlen($subhlevel);
 952                                                 }
 953                                                 if($subhlevel > $hlevel) {
 954                                                         // erase old subsections
 955                                                         $secs[$count*2-1]='';
 956                                                         $secs[$count*2]='';
 957                                                 }
 958                                                 if($subhlevel <= $hlevel) {
 959                                                         $break=true;
 960                                                 }
 961                                                 $count++;
 962
 963                                         }
 964
 965                                 }
 966                                 $text=join('',$secs);
 967                                 # reinsert the stuff that we stripped out earlier
 968                                 $text=$parser->unstrip($text,$striparray);
 969                                 $text=$parser->unstripNoWiki($text,$striparray);
 970                         }
 971
 972                 }
 973                 return $text;
 974         }
 975
 976         /**
 977          * Change an existing article. Puts the previous version back into the old table, updates RC
 978          * and all necessary caches, mostly via the deferred update array.
 979          *
 980          * It is possible to call this function from a command-line script, but note that you should
 981          * first set $wgUser, and clean up $wgDeferredUpdates after each edit.
 982          */
 983         function updateArticle( $text, $summary, $minor, $watchthis, $forceBot = false, $sectionanchor = '' ) {
 984                 global $wgOut, $wgUser;
 985                 global $wgDBtransactions, $wgMwRedir;
 986                 global $wgUseSquid, $wgInternalServer;
 987
 988                 $fname = 'Article::updateArticle';
 989                 $good = true;
 990
 991                 if ( $this->mMinorEdit ) { $me1 = 1; } else { $me1 = 0; }
 992                 if ( $minor && $wgUser->getID() ) { $me2 = 1; } else { $me2 = 0; }
 993                 if ( $this->isRedirect( $text ) ) {
 994                         # Remove all content but redirect
 995                         # This could be done by reconstructing the redirect from a title given by
 996                         # Title::newFromRedirect(), but then we wouldn't know which synonym the user
 997                         # wants to see
 998                         if ( preg_match( "/^((" . $wgMwRedir->getBaseRegex() . ')[^\\n]+)/i', $text, $m ) ) {
 999                                 $redir = 1;
1000                                 $text = $m[1] . "\n";
1001                         }
1002                 }
1003                 else { $redir = 0; }
1004
1005                 $text = $this->preSaveTransform( $text );
1006                 $dbw =& wfGetDB( DB_MASTER );
1007
1008                 # Update article, but only if changed.
1009
1010                 # It's important that we either rollback or complete, otherwise an attacker could
1011                 # overwrite cur entries by sending precisely timed user aborts. Random bored users
1012                 # could conceivably have the same effect, especially if cur is locked for long periods.
1013                 if( $wgDBtransactions ) {
1014                         $dbw->query( 'BEGIN', $fname );
1015                 } else {
1016                         $userAbort = ignore_user_abort( true );
1017                 }
1018
1019                 $oldtext = $this->getContent( true );
1020
1021                 if ( 0 != strcmp( $text, $oldtext ) ) {
1022                         $this->mCountAdjustment = $this->isCountable( $text )
1023                           - $this->isCountable( $oldtext );
1024                         $now = wfTimestampNow();
1025                         $won = wfInvertTimestamp( $now );
1026
1027                         # First update the cur row
1028                         $dbw->update( 'cur',
1029                                 array( /* SET */
1030                                         'cur_text' => $text,
1031                                         'cur_comment' => $summary,
1032                                         'cur_minor_edit' => $me2,
1033                                         'cur_user' => $wgUser->getID(),
1034                                         'cur_timestamp' => $dbw->timestamp($now),
1035                                         'cur_user_text' => $wgUser->getName(),
1036                                         'cur_is_redirect' => $redir,
1037                                         'cur_is_new' => 0,
1038                                         'cur_touched' => $dbw->timestamp($now),
1039                                         'inverse_timestamp' => $won
1040                                 ), array( /* WHERE */
1041                                         'cur_id' => $this->getID(),
1042                                         'cur_timestamp' => $dbw->timestamp($this->getTimestamp())
1043                                 ), $fname
1044                         );
1045
1046                         if( $dbw->affectedRows() == 0 ) {
1047                                 /* Belated edit conflict! Run away!! */
1048                                 $good = false;
1049                         } else {
1050                                 # Now insert the previous revision into old
1051
1052                                 # This overwrites $oldtext if revision compression is on
1053                                 $flags = Article::compressRevisionText( $oldtext );
1054
1055                                 $dbw->insert( 'old',
1056                                         array(
1057                                                 'old_id' => $dbw->nextSequenceValue( 'old_old_id_seq' ),
1058                                                 'old_namespace' => $this->mTitle->getNamespace(),
1059                                                 'old_title' => $this->mTitle->getDBkey(),
1060                                                 'old_text' => $oldtext,
1061                                                 'old_comment' => $this->getComment(),
1062                                                 'old_user' => $this->getUser(),
1063                                                 'old_user_text' => $this->getUserText(),
1064                                                 'old_timestamp' => $dbw->timestamp($this->getTimestamp()),
1065                                                 'old_minor_edit' => $me1,
1066                                                 'inverse_timestamp' => wfInvertTimestamp( $this->getTimestamp() ),
1067                                                 'old_flags' => $flags,
1068                                         ), $fname
1069                                 );
1070
1071                                 $oldid = $dbw->insertId();
1072
1073                                 $bot = (int)($wgUser->isBot() || $forceBot);
1074                                 RecentChange::notifyEdit( $now, $this->mTitle, $me2, $wgUser, $summary,
1075                                         $oldid, $this->getTimestamp(), $bot );
1076                                 Article::onArticleEdit( $this->mTitle );
1077                         }
1078                 }
1079
1080                 if( $wgDBtransactions ) {
1081                         $dbw->query( 'COMMIT', $fname );
1082                 } else {
1083                         ignore_user_abort( $userAbort );
1084                 }
1085
1086                 if ( $good ) {
1087                 if ($watchthis) {
1088                         if (!$this->mTitle->userIsWatching()) $this->watch();
1089                 } else {
1090                         if ( $this->mTitle->userIsWatching() ) {
1091                                 $this->unwatch();
1092                         }
1093                 }
1094                 # standard deferred updates
1095                 $this->editUpdates( $text );
1096
1097
1098                 $urls = array();
1099                 # Template namespace
1100                 # Purge all articles linking here
1101                 if ( $this->mTitle->getNamespace() == NS_TEMPLATE) {
1102                         $titles = $this->mTitle->getLinksTo();
1103                         Title::touchArray( $titles );
1104                         if ( $wgUseSquid ) {
1105                                         foreach ( $titles as $title ) {
1106                                                 $urls[] = $title->getInternalURL();
1107                                         }
1108                         }
1109                 }
1110
1111                 # Squid updates
1112                 if ( $wgUseSquid ) {
1113                         $urls = array_merge( $urls, $this->mTitle->getSquidURLs() );
1114                         $u = new SquidUpdate( $urls );
1115                         $u->doUpdate();
1116                 }
1117
1118                 $this->showArticle( $text, wfMsg( 'updated' ), $sectionanchor );
1119                 }
1120                 return $good;
1121         }
1122
1123         /**
1124          * After we've either updated or inserted the article, update
1125          * the link tables and redirect to the new page.
1126          */
1127         function showArticle( $text, $subtitle , $sectionanchor = '' ) {
1128                 global $wgOut, $wgUser, $wgLinkCache;
1129
1130                 $wgLinkCache = new LinkCache();
1131                 # Select for update
1132                 $wgLinkCache->forUpdate( true );
1133
1134                 # Get old version of link table to allow incremental link updates
1135                 $wgLinkCache->preFill( $this->mTitle );
1136                 $wgLinkCache->clear();
1137
1138                 # Parse the text and replace links with placeholders
1139                 $wgOut = new OutputPage();
1140                 $wgOut->addWikiText( $text );
1141
1142                 # Look up the links in the DB and add them to the link cache
1143                 $wgOut->transformBuffer( RLH_FOR_UPDATE );
1144
1145                 if( $this->isRedirect( $text ) )
1146                         $r = 'redirect=no';
1147                 else
1148                         $r = '';
1149                 $wgOut->redirect( $this->mTitle->getFullURL( $r ).$sectionanchor );
1150         }
1151
1152         /**
1153          * Validate article
1154          * @todo document this function a bit more
1155          */
1156         function validate () {
1157                 global $wgOut, $wgUseValidation;
1158                 if( $wgUseValidation ) {
1159                         require_once ( 'SpecialValidate.php' ) ;
1160                         $wgOut->setPagetitle( wfMsg( 'validate' ) . ': ' . $this->mTitle->getPrefixedText() );
1161                         $wgOut->setRobotpolicy( 'noindex,follow' );
1162                         if( $this->mTitle->getNamespace() != 0 ) {
1163                                 $wgOut->addHTML( wfMsg( 'val_validate_article_namespace_only' ) );
1164                                 return;
1165                         }
1166                         $v = new Validation;
1167                         $v->validate_form( $this->mTitle->getDBkey() );
1168                 } else {
1169                         $wgOut->errorpage( 'nosuchaction', 'nosuchactiontext' );
1170                 }
1171         }
1172
1173         /**
1174          * Mark this particular edit as patrolled
1175          */
1176         function markpatrolled() {
1177                 global $wgOut, $wgRequest, $wgOnlySysopsCanPatrol, $wgUseRCPatrol, $wgUser;
1178                 $wgOut->setRobotpolicy( 'noindex,follow' );
1179
1180                 if ( !$wgUseRCPatrol )
1181                 {
1182                         $wgOut->errorpage( 'rcpatroldisabled', 'rcpatroldisabledtext' );
1183                         return;
1184                 }
1185                 if ( $wgUser->getID() == 0 )
1186                 {
1187                         $wgOut->loginToUse();
1188                         return;
1189                 }
1190                 if ( $wgOnlySysopsCanPatrol && !$wgUser->isAllowed('patrol') )
1191                 {
1192                         $wgOut->sysopRequired();
1193                         return;
1194                 }
1195                 $rcid = $wgRequest->getVal( 'rcid' );
1196                 if ( !is_null ( $rcid ) )
1197                 {
1198                         RecentChange::markPatrolled( $rcid );
1199                         $wgOut->setPagetitle( wfMsg( 'markedaspatrolled' ) );
1200                         $wgOut->addWikiText( wfMsg( 'markedaspatrolledtext' ) );
1201                         $wgOut->returnToMain( true, $this->mTitle->getPrefixedText() );
1202                 }
1203                 else
1204                 {
1205                         $wgOut->errorpage( 'markedaspatrollederror', 'markedaspatrollederrortext' );
1206                 }
1207         }
1208
1209
1210         /**
1211          * Add or remove this page to my watchlist based on value of $add
1212          */
1213         function watch( $add = true ) {
1214                 global $wgUser, $wgOut;
1215                 global $wgDeferredUpdateList;
1216
1217                 if ( 0 == $wgUser->getID() ) {
1218                         $wgOut->errorpage( 'watchnologin', 'watchnologintext' );
1219                         return;
1220                 }
1221                 if ( wfReadOnly() ) {
1222                         $wgOut->readOnlyPage();
1223                         return;
1224                 }
1225                 if( $add )
1226                         $wgUser->addWatch( $this->mTitle );
1227                 else
1228                         $wgUser->removeWatch( $this->mTitle );
1229
1230                 $wgOut->setPagetitle( wfMsg( $add ? 'addedwatch' : 'removedwatch' ) );
1231                 $wgOut->setRobotpolicy( 'noindex,follow' );
1232
1233                 $sk = $wgUser->getSkin() ;
1234                 $link = $this->mTitle->getPrefixedText();
1235
1236                 if($add)
1237                         $text = wfMsg( 'addedwatchtext', $link );
1238                 else
1239                         $text = wfMsg( 'removedwatchtext', $link );
1240                 $wgOut->addWikiText( $text );
1241
1242                 $up = new UserUpdate();
1243                 array_push( $wgDeferredUpdateList, $up );
1244
1245                 $wgOut->returnToMain( true, $this->mTitle->getPrefixedText() );
1246         }
1247
1248         /**
1249          * Stop watching a page, it act just like a call to watch(false)
1250          */
1251         function unwatch() {
1252                 $this->watch( false );
1253         }
1254
1255         /**
1256          * protect a page
1257          */
1258         function protect( $limit = 'sysop' ) {
1259                 global $wgUser, $wgOut, $wgRequest;
1260
1261                 if ( ! $wgUser->isAllowed('protect') ) {
1262                         $wgOut->sysopRequired();
1263                         return;
1264                 }
1265                 if ( wfReadOnly() ) {
1266                         $wgOut->readOnlyPage();
1267                         return;
1268                 }
1269                 $id = $this->mTitle->getArticleID();
1270                 if ( 0 == $id ) {
1271                         $wgOut->fatalError( wfMsg( 'badarticleerror' ) );
1272                         return;
1273                 }
1274
1275                 $confirm = $wgRequest->getBool( 'wpConfirmProtect' ) && $wgRequest->wasPosted();
1276                 $moveonly = $wgRequest->getBool( 'wpMoveOnly' );
1277                 $reason = $wgRequest->getText( 'wpReasonProtect' );
1278
1279                 if ( $confirm ) {
1280                         $restrictions = "move=" . $limit;
1281                         if( !$moveonly ) {
1282                                 $restrictions .= ":edit=" . $limit;
1283                         }
1284
1285                         $dbw =& wfGetDB( DB_MASTER );
1286                         $dbw->update( 'cur',
1287                                 array( /* SET */
1288                                         'cur_touched' => $dbw->timestamp(),
1289                                         'cur_restrictions' => $restrictions
1290                                 ), array( /* WHERE */
1291                                         'cur_id' => $id
1292                                 ), 'Article::protect'
1293                         );
1294
1295                         $log = new LogPage( 'protect' );
1296                         if ( $limit === '' ) {
1297                                         $log->addEntry( 'unprotect', $this->mTitle, $reason );
1298                         } else {
1299                                         $log->addEntry( 'protect', $this->mTitle, $reason );
1300                         }
1301                         $wgOut->redirect( $this->mTitle->getFullURL() );
1302                         return;
1303                 } else {
1304                         $reason = htmlspecialchars( wfMsg( 'protectreason' ) );
1305                         return $this->confirmProtect( '', $reason, $limit );
1306                 }
1307         }
1308
1309         /**
1310          * Output protection confirmation dialog
1311          */
1312         function confirmProtect( $par, $reason, $limit = 'sysop'  ) {
1313                 global $wgOut;
1314
1315                 wfDebug( "Article::confirmProtect\n" );
1316
1317                 $sub = htmlspecialchars( $this->mTitle->getPrefixedText() );
1318                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
1319
1320                 $check = '';
1321                 $protcom = '';
1322                 $moveonly = '';
1323
1324                 if ( $limit === '' ) {
1325                         $wgOut->setPageTitle( wfMsg( 'confirmunprotect' ) );
1326                         $wgOut->setSubtitle( wfMsg( 'unprotectsub', $sub ) );
1327                         $wgOut->addWikiText( wfMsg( 'confirmunprotecttext' ) );
1328                         $check = htmlspecialchars( wfMsg( 'confirmunprotect' ) );
1329                         $protcom = htmlspecialchars( wfMsg( 'unprotectcomment' ) );
1330                         $formaction = $this->mTitle->escapeLocalURL( 'action=unprotect' . $par );
1331                 } else {
1332                         $wgOut->setPageTitle( wfMsg( 'confirmprotect' ) );
1333                         $wgOut->setSubtitle( wfMsg( 'protectsub', $sub ) );
1334                         $wgOut->addWikiText( wfMsg( 'confirmprotecttext' ) );
1335                         $check = htmlspecialchars( wfMsg( 'confirmprotect' ) );
1336                         $moveonly = htmlspecialchars( wfMsg( 'protectmoveonly' ) );
1337                         $protcom = htmlspecialchars( wfMsg( 'protectcomment' ) );
1338                         $formaction = $this->mTitle->escapeLocalURL( 'action=protect' . $par );
1339                 }
1340
1341                 $confirm = htmlspecialchars( wfMsg( 'confirm' ) );
1342
1343                 $wgOut->addHTML( "
1344 <form id='protectconfirm' method='post' action=\"{$formaction}\">
1345         <table border='0'>
1346                 <tr>
1347                         <td align='right'>
1348                                 <label for='wpReasonProtect'>{$protcom}:</label>
1349                         </td>
1350                         <td align='left'>
1351                                 <input type='text' size='60' name='wpReasonProtect' id='wpReasonProtect' value=\"" . htmlspecialchars( $reason ) . "\" />
1352                         </td>
1353                 </tr>
1354                 <tr>
1355                         <td>&nbsp;</td>
1356                 </tr>
1357                 <tr>
1358                         <td align='right'>
1359                                 <input type='checkbox' name='wpConfirmProtect' value='1' id='wpConfirmProtect' />
1360                         </td>
1361                         <td>
1362                                 <label for='wpConfirmProtect'>{$check}</label>
1363                         </td>
1364                 </tr> " );
1365                 if($moveonly != '') {
1366                         $wgOut->AddHTML( "
1367                 <tr>
1368                         <td align='right'>
1369                                 <input type='checkbox' name='wpMoveOnly' value='1' id='wpMoveOnly' />
1370                         </td>
1371                         <td>
1372                                 <label for='wpMoveOnly'>{$moveonly}</label>
1373                         </td>
1374                 </tr> " );
1375                 }
1376                 $wgOut->addHTML( "
1377                 <tr>
1378                         <td>&nbsp;</td>
1379                         <td>
1380                                 <input type='submit' name='wpConfirmProtectB' value=\"{$confirm}\" />
1381                         </td>
1382                 </tr>
1383         </table>
1384 </form>\n" );
1385
1386                 $wgOut->returnToMain( false );
1387         }
1388
1389         /**
1390          * Unprotect the pages
1391          */
1392         function unprotect() {
1393                 return $this->protect( '' );
1394         }
1395
1396         /*
1397          * UI entry point for page deletion
1398          */
1399         function delete() {
1400                 global $wgUser, $wgOut, $wgMessageCache, $wgRequest;
1401                 $fname = 'Article::delete';
1402                 $confirm = $wgRequest->getBool( 'wpConfirm' ) && $wgRequest->wasPosted();
1403                 $reason = $wgRequest->getText( 'wpReason' );
1404
1405                 # This code desperately needs to be totally rewritten
1406
1407                 # Check permissions
1408                 if ( ( ! $wgUser->isAllowed('delete') ) ) {
1409                         $wgOut->sysopRequired();
1410                         return;
1411                 }
1412                 if ( wfReadOnly() ) {
1413                         $wgOut->readOnlyPage();
1414                         return;
1415                 }
1416
1417                 # Better double-check that it hasn't been deleted yet!
1418                 $wgOut->setPagetitle( wfMsg( 'confirmdelete' ) );
1419                 if ( ( '' == trim( $this->mTitle->getText() ) )
1420                   or ( $this->mTitle->getArticleId() == 0 ) ) {
1421                         $wgOut->fatalError( wfMsg( 'cannotdelete' ) );
1422                         return;
1423                 }
1424
1425                 if ( $confirm ) {
1426                         $this->doDelete( $reason );
1427                         return;
1428                 }
1429
1430                 # determine whether this page has earlier revisions
1431                 # and insert a warning if it does
1432                 # we select the text because it might be useful below
1433                 $dbr =& $this->getDB();
1434                 $ns = $this->mTitle->getNamespace();
1435                 $title = $this->mTitle->getDBkey();
1436                 $old = $dbr->selectRow( 'old',
1437                         array( 'old_text', 'old_flags' ),
1438                         array(
1439                                 'old_namespace' => $ns,
1440                                 'old_title' => $title,
1441                         ), $fname, $this->getSelectOptions( array( 'ORDER BY' => 'inverse_timestamp' ) )
1442                 );
1443
1444                 if( $old !== false && !$confirm ) {
1445                         $skin=$wgUser->getSkin();
1446                         $wgOut->addHTML('<b>'.wfMsg('historywarning'));
1447                         $wgOut->addHTML( $skin->historyLink() .'</b>');
1448                 }
1449
1450                 # Fetch cur_text
1451                 $s = $dbr->selectRow( 'cur',
1452                         array( 'cur_text' ),
1453                         array(
1454                                 'cur_namespace' => $ns,
1455                                 'cur_title' => $title,
1456                         ), $fname, $this->getSelectOptions()
1457                 );
1458
1459                 if( $s !== false ) {
1460                         # if this is a mini-text, we can paste part of it into the deletion reason
1461
1462                         #if this is empty, an earlier revision may contain "useful" text
1463                         $blanked = false;
1464                         if($s->cur_text != '') {
1465                                 $text=$s->cur_text;
1466                         } else {
1467                                 if($old) {
1468                                         $text = Article::getRevisionText( $old );
1469                                         $blanked = true;
1470                                 }
1471
1472                         }
1473
1474                         $length=strlen($text);
1475
1476                         # this should not happen, since it is not possible to store an empty, new
1477                         # page. Let's insert a standard text in case it does, though
1478                         if($length == 0 && $reason === '') {
1479                                 $reason = wfMsg('exblank');
1480                         }
1481
1482                         if($length < 500 && $reason === '') {
1483
1484                                 # comment field=255, let's grep the first 150 to have some user
1485                                 # space left
1486                                 $text=substr($text,0,150);
1487                                 # let's strip out newlines and HTML tags
1488                                 $text=preg_replace('/\"/',"'",$text);
1489                                 $text=preg_replace('/\</','&lt;',$text);
1490                                 $text=preg_replace('/\>/','&gt;',$text);
1491                                 $text=preg_replace("/[\n\r]/",'',$text);
1492                                 if(!$blanked) {
1493                                         $reason=wfMsg('excontent'). " '".$text;
1494                                 } else {
1495                                         $reason=wfMsg('exbeforeblank') . " '".$text;
1496                                 }
1497                                 if($length>150) { $reason .= '...'; } # we've only pasted part of the text
1498                                 $reason.="'";
1499                         }
1500                 }
1501
1502                 return $this->confirmDelete( '', $reason );
1503         }
1504
1505         /**
1506          * Output deletion confirmation dialog
1507          */
1508         function confirmDelete( $par, $reason ) {
1509                 global $wgOut;
1510
1511                 wfDebug( "Article::confirmDelete\n" );
1512
1513                 $sub = htmlspecialchars( $this->mTitle->getPrefixedText() );
1514                 $wgOut->setSubtitle( wfMsg( 'deletesub', $sub ) );
1515                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
1516                 $wgOut->addWikiText( wfMsg( 'confirmdeletetext' ) );
1517
1518                 $formaction = $this->mTitle->escapeLocalURL( 'action=delete' . $par );
1519
1520                 $confirm = htmlspecialchars( wfMsg( 'confirm' ) );
1521                 $check = htmlspecialchars( wfMsg( 'confirmcheck' ) );
1522                 $delcom = htmlspecialchars( wfMsg( 'deletecomment' ) );
1523
1524                 $wgOut->addHTML( "
1525 <form id='deleteconfirm' method='post' action=\"{$formaction}\">
1526         <table border='0'>
1527                 <tr>
1528                         <td align='right'>
1529                                 <label for='wpReason'>{$delcom}:</label>
1530                         </td>
1531                         <td align='left'>
1532                                 <input type='text' size='60' name='wpReason' id='wpReason' value=\"" . htmlspecialchars( $reason ) . "\" />
1533                         </td>
1534                 </tr>
1535                 <tr>
1536                         <td>&nbsp;</td>
1537                 </tr>
1538                 <tr>
1539                         <td align='right'>
1540                                 <input type='checkbox' name='wpConfirm' value='1' id='wpConfirm' />
1541                         </td>
1542                         <td>
1543                                 <label for='wpConfirm'>{$check}</label>
1544                         </td>
1545                 </tr>
1546                 <tr>
1547                         <td>&nbsp;</td>
1548                         <td>
1549                                 <input type='submit' name='wpConfirmB' value=\"{$confirm}\" />
1550                         </td>
1551                 </tr>
1552         </table>
1553 </form>\n" );
1554
1555                 $wgOut->returnToMain( false );
1556         }
1557
1558
1559         /**
1560          * Perform a deletion and output success or failure messages
1561          */
1562         function doDelete( $reason ) {
1563                 global $wgOut, $wgUser, $wgContLang;
1564                 $fname = 'Article::doDelete';
1565                 wfDebug( $fname."\n" );
1566
1567                 if ( $this->doDeleteArticle( $reason ) ) {
1568                         $deleted = $this->mTitle->getPrefixedText();
1569
1570                         $wgOut->setPagetitle( wfMsg( 'actioncomplete' ) );
1571                         $wgOut->setRobotpolicy( 'noindex,nofollow' );
1572
1573                         $sk = $wgUser->getSkin();
1574                         $loglink = $sk->makeKnownLink( $wgContLang->getNsText( NS_PROJECT ) .
1575                           ':' . wfMsgForContent( 'dellogpage' ), wfMsg( 'deletionlog' ) );
1576
1577                         $text = wfMsg( 'deletedtext', $deleted, $loglink );
1578
1579                         $wgOut->addHTML( '<p>' . $text . "</p>\n" );
1580                         $wgOut->returnToMain( false );
1581                 } else {
1582                         $wgOut->fatalError( wfMsg( 'cannotdelete' ) );
1583                 }
1584         }
1585
1586         /**
1587          * Back-end article deletion
1588          * Deletes the article with database consistency, writes logs, purges caches
1589          * Returns success
1590          */
1591         function doDeleteArticle( $reason ) {
1592                 global $wgUser;
1593                 global  $wgUseSquid, $wgDeferredUpdateList, $wgInternalServer;
1594
1595                 $fname = 'Article::doDeleteArticle';
1596                 wfDebug( $fname."\n" );
1597
1598                 $dbw =& wfGetDB( DB_MASTER );
1599                 $ns = $this->mTitle->getNamespace();
1600                 $t = $this->mTitle->getDBkey();
1601                 $id = $this->mTitle->getArticleID();
1602
1603                 if ( $t == '' || $id == 0 ) {
1604                         return false;
1605                 }
1606
1607                 $u = new SiteStatsUpdate( 0, 1, -$this->isCountable( $this->getContent( true ) ) );
1608                 array_push( $wgDeferredUpdateList, $u );
1609
1610                 $linksTo = $this->mTitle->getLinksTo();
1611
1612                 # Squid purging
1613                 if ( $wgUseSquid ) {
1614                         $urls = array(
1615                                 $this->mTitle->getInternalURL(),
1616                                 $this->mTitle->getInternalURL( 'history' )
1617                         );
1618                         foreach ( $linksTo as $linkTo ) {
1619                                 $urls[] = $linkTo->getInternalURL();
1620                         }
1621
1622                         $u = new SquidUpdate( $urls );
1623                         array_push( $wgDeferredUpdateList, $u );
1624
1625                 }
1626
1627                 # Client and file cache invalidation
1628                 Title::touchArray( $linksTo );
1629
1630                 # Move article and history to the "archive" table
1631                 $archiveTable = $dbw->tableName( 'archive' );
1632                 $oldTable = $dbw->tableName( 'old' );
1633                 $curTable = $dbw->tableName( 'cur' );
1634                 $recentchangesTable = $dbw->tableName( 'recentchanges' );
1635                 $linksTable = $dbw->tableName( 'links' );
1636                 $brokenlinksTable = $dbw->tableName( 'brokenlinks' );
1637
1638                 $dbw->insertSelect( 'archive', 'cur',
1639                         array(
1640                                 'ar_namespace' => 'cur_namespace',
1641                                 'ar_title' => 'cur_title',
1642                                 'ar_text' => 'cur_text',
1643                                 'ar_comment' => 'cur_comment',
1644                                 'ar_user' => 'cur_user',
1645                                 'ar_user_text' => 'cur_user_text',
1646                                 'ar_timestamp' => 'cur_timestamp',
1647                                 'ar_minor_edit' => 'cur_minor_edit',
1648                                 'ar_flags' => 0,
1649                         ), array(
1650                                 'cur_namespace' => $ns,
1651                                 'cur_title' => $t,
1652                         ), $fname
1653                 );
1654
1655                 $dbw->insertSelect( 'archive', 'old',
1656                         array(
1657                                 'ar_namespace' => 'old_namespace',
1658                                 'ar_title' => 'old_title',
1659                                 'ar_text' => 'old_text',
1660                                 'ar_comment' => 'old_comment',
1661                                 'ar_user' => 'old_user',
1662                                 'ar_user_text' => 'old_user_text',
1663                                 'ar_timestamp' => 'old_timestamp',
1664                                 'ar_minor_edit' => 'old_minor_edit',
1665                                 'ar_flags' => 'old_flags'
1666                         ), array(
1667                                 'old_namespace' => $ns,
1668                                 'old_title' => $t,
1669                         ), $fname
1670                 );
1671
1672                 # Now that it's safely backed up, delete it
1673
1674                 $dbw->delete( 'cur', array( 'cur_namespace' => $ns, 'cur_title' => $t ), $fname );
1675                 $dbw->delete( 'old', array( 'old_namespace' => $ns, 'old_title' => $t ), $fname );
1676                 $dbw->delete( 'recentchanges', array( 'rc_namespace' => $ns, 'rc_title' => $t ), $fname );
1677
1678                 # Finally, clean up the link tables
1679                 $t = $this->mTitle->getPrefixedDBkey();
1680
1681                 Article::onArticleDelete( $this->mTitle );
1682
1683                 # Insert broken links
1684                 $brokenLinks = array();
1685                 foreach ( $linksTo as $titleObj ) {
1686                         # Get article ID. Efficient because it was loaded into the cache by getLinksTo().
1687                         $linkID = $titleObj->getArticleID();
1688                         $brokenLinks[] = array( 'bl_from' => $linkID, 'bl_to' => $t );
1689                 }
1690                 $dbw->insert( 'brokenlinks', $brokenLinks, $fname, 'IGNORE' );
1691
1692                 # Delete live links
1693                 $dbw->delete( 'links', array( 'l_to' => $id ) );
1694                 $dbw->delete( 'links', array( 'l_from' => $id ) );
1695                 $dbw->delete( 'imagelinks', array( 'il_from' => $id ) );
1696                 $dbw->delete( 'brokenlinks', array( 'bl_from' => $id ) );
1697                 $dbw->delete( 'categorylinks', array( 'cl_from' => $id ) );
1698
1699                 # Log the deletion
1700                 $log = new LogPage( 'delete' );
1701                 $log->addEntry( 'delete', $this->mTitle, $reason );
1702
1703                 # Clear the cached article id so the interface doesn't act like we exist
1704                 $this->mTitle->resetArticleID( 0 );
1705                 $this->mTitle->mArticleID = 0;
1706                 return true;
1707         }
1708
1709         /**
1710          * Revert a modification
1711          */
1712         function rollback() {
1713                 global $wgUser, $wgOut, $wgRequest;
1714                 $fname = 'Article::rollback';
1715
1716                 if ( ! $wgUser->isAllowed('rollback') ) {
1717                         $wgOut->sysopRequired();
1718                         return;
1719                 }
1720                 if ( wfReadOnly() ) {
1721                         $wgOut->readOnlyPage( $this->getContent( true ) );
1722                         return;
1723                 }
1724                 $dbw =& wfGetDB( DB_MASTER );
1725
1726                 # Enhanced rollback, marks edits rc_bot=1
1727                 $bot = $wgRequest->getBool( 'bot' );
1728
1729                 # Replace all this user's current edits with the next one down
1730                 $tt = $this->mTitle->getDBKey();
1731                 $n = $this->mTitle->getNamespace();
1732
1733                 # Get the last editor, lock table exclusively
1734                 $s = $dbw->selectRow( 'cur',
1735                         array( 'cur_id','cur_user','cur_user_text','cur_comment' ),
1736                         array( 'cur_title' => $tt, 'cur_namespace' => $n ),
1737                         $fname, 'FOR UPDATE'
1738                 );
1739                 if( $s === false ) {
1740                         # Something wrong
1741                         $wgOut->addHTML( wfMsg( 'notanarticle' ) );
1742                         return;
1743                 }
1744                 $ut = $dbw->strencode( $s->cur_user_text );
1745                 $uid = $s->cur_user;
1746                 $pid = $s->cur_id;
1747
1748                 $from = str_replace( '_', ' ', $wgRequest->getVal( 'from' ) );
1749                 if( $from != $s->cur_user_text ) {
1750                         $wgOut->setPageTitle(wfmsg('rollbackfailed'));
1751                         $wgOut->addWikiText( wfMsg( 'alreadyrolled',
1752                                 htmlspecialchars( $this->mTitle->getPrefixedText()),
1753                                 htmlspecialchars( $from ),
1754                                 htmlspecialchars( $s->cur_user_text ) ) );
1755                         if($s->cur_comment != '') {
1756                                 $wgOut->addHTML(
1757                                         wfMsg('editcomment',
1758                                         htmlspecialchars( $s->cur_comment ) ) );
1759                         }
1760                         return;
1761                 }
1762
1763                 # Get the last edit not by this guy
1764                 $s = $dbw->selectRow( 'old',
1765                         array( 'old_text','old_user','old_user_text','old_timestamp','old_flags' ),
1766                         array(
1767                                 'old_namespace' => $n,
1768                                 'old_title' => $tt,
1769                                 "old_user <> {$uid} OR old_user_text <> '{$ut}'"
1770                         ), $fname, array( 'FOR UPDATE', 'USE INDEX' => 'name_title_timestamp' )
1771                 );
1772                 if( $s === false ) {
1773                         # Something wrong
1774                         $wgOut->setPageTitle(wfMsg('rollbackfailed'));
1775                         $wgOut->addHTML( wfMsg( 'cantrollback' ) );
1776                         return;
1777                 }
1778
1779                 if ( $bot ) {
1780                         # Mark all reverted edits as bot
1781                         $dbw->update( 'recentchanges',
1782                                 array( /* SET */
1783                                         'rc_bot' => 1
1784                                 ), array( /* WHERE */
1785                                         'rc_user' => $uid,
1786                                         "rc_timestamp > '{$s->old_timestamp}'",
1787                                 ), $fname
1788                         );
1789                 }
1790
1791                 # Save it!
1792                 $newcomment = wfMsg( 'revertpage', $s->old_user_text, $from );
1793                 $wgOut->setPagetitle( wfMsg( 'actioncomplete' ) );
1794                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
1795                 $wgOut->addHTML( '<h2>' . htmlspecialchars( $newcomment ) . "</h2>\n<hr />\n" );
1796                 $this->updateArticle( Article::getRevisionText( $s ), $newcomment, 1, $this->mTitle->userIsWatching(), $bot );
1797                 Article::onArticleEdit( $this->mTitle );
1798                 $wgOut->returnToMain( false );
1799         }
1800
1801
1802         /**
1803          * Do standard deferred updates after page view
1804          * @private
1805          */
1806         function viewUpdates() {
1807                 global $wgDeferredUpdateList;
1808                 if ( 0 != $this->getID() ) {
1809                         global $wgDisableCounters;
1810                         if( !$wgDisableCounters ) {
1811                                 Article::incViewCount( $this->getID() );
1812                                 $u = new SiteStatsUpdate( 1, 0, 0 );
1813                                 array_push( $wgDeferredUpdateList, $u );
1814                         }
1815                 }
1816                 $u = new UserTalkUpdate( 0, $this->mTitle->getNamespace(),
1817                   $this->mTitle->getDBkey() );
1818                 array_push( $wgDeferredUpdateList, $u );
1819         }
1820
1821         /**
1822          * Do standard deferred updates after page edit.
1823          * Every 1000th edit, prune the recent changes table.
1824          * @private
1825          * @param string $text
1826          */
1827         function editUpdates( $text ) {
1828                 global $wgDeferredUpdateList, $wgDBname, $wgMemc;
1829                 global $wgMessageCache;
1830
1831                 wfSeedRandom();
1832                 if ( 0 == mt_rand( 0, 999 ) ) {
1833                         $dbw =& wfGetDB( DB_MASTER );
1834                         $cutoff = $dbw->timestamp( time() - ( 7 * 86400 ) );
1835                         $sql = "DELETE FROM recentchanges WHERE rc_timestamp < '{$cutoff}'";
1836                         $dbw->query( $sql );
1837                 }
1838                 $id = $this->getID();
1839                 $title = $this->mTitle->getPrefixedDBkey();
1840                 $shortTitle = $this->mTitle->getDBkey();
1841
1842                 $adj = $this->mCountAdjustment;
1843
1844                 if ( 0 != $id ) {
1845                         $u = new LinksUpdate( $id, $title );
1846                         array_push( $wgDeferredUpdateList, $u );
1847                         $u = new SiteStatsUpdate( 0, 1, $adj );
1848                         array_push( $wgDeferredUpdateList, $u );
1849                         $u = new SearchUpdate( $id, $title, $text );
1850                         array_push( $wgDeferredUpdateList, $u );
1851
1852                         $u = new UserTalkUpdate( 1, $this->mTitle->getNamespace(), $shortTitle );
1853                         array_push( $wgDeferredUpdateList, $u );
1854
1855                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
1856                                 $wgMessageCache->replace( $shortTitle, $text );
1857                         }
1858                 }
1859         }
1860
1861         /**
1862          * @todo document this function
1863          * @private
1864          * @param string $oldid         Revision ID of this article revision
1865          */
1866         function setOldSubtitle( $oldid=0 ) {
1867                 global $wgLang, $wgOut, $wgUser;
1868
1869                 $td = $wgLang->timeanddate( $this->mTimestamp, true );
1870                 $sk = $wgUser->getSkin();
1871                 $lnk = $sk->makeKnownLinkObj ( $this->mTitle, wfMsg( 'currentrevisionlink' ) );
1872                 $prevlink = $sk->makeKnownLinkObj( $this->mTitle, wfMsg( 'previousrevision' ), 'direction=prev&oldid='.$oldid );
1873                 $nextlink = $sk->makeKnownLinkObj( $this->mTitle, wfMsg( 'nextrevision' ), 'direction=next&oldid='.$oldid );
1874                 $r = wfMsg( 'revisionasofwithlink', $td, $lnk, $prevlink, $nextlink );
1875                 $wgOut->setSubtitle( $r );
1876         }
1877
1878         /**
1879          * This function is called right before saving the wikitext,
1880          * so we can do things like signatures and links-in-context.
1881          *
1882          * @param string $text
1883          */
1884         function preSaveTransform( $text ) {
1885                 global $wgParser, $wgUser;
1886                 return $wgParser->preSaveTransform( $text, $this->mTitle, $wgUser, ParserOptions::newFromUser( $wgUser ) );
1887         }
1888
1889         /* Caching functions */
1890
1891         /**
1892          * checkLastModified returns true if it has taken care of all
1893          * output to the client that is necessary for this request.
1894          * (that is, it has sent a cached version of the page)
1895          */
1896         function tryFileCache() {
1897                 static $called = false;
1898                 if( $called ) {
1899                         wfDebug( " tryFileCache() -- called twice!?\n" );
1900                         return;
1901                 }
1902                 $called = true;
1903                 if($this->isFileCacheable()) {
1904                         $touched = $this->mTouched;
1905                         if( $this->mTitle->getPrefixedDBkey() == wfMsg( 'mainpage' ) ) {
1906                                 # Expire the main page quicker
1907                                 $expire = wfUnix2Timestamp( time() - 3600 );
1908                                 $touched = max( $expire, $touched );
1909                         }
1910                         $cache = new CacheManager( $this->mTitle );
1911                         if($cache->isFileCacheGood( $touched )) {
1912                                 global $wgOut;
1913                                 wfDebug( " tryFileCache() - about to load\n" );
1914                                 $cache->loadFromFileCache();
1915                                 return true;
1916                         } else {
1917                                 wfDebug( " tryFileCache() - starting buffer\n" );
1918                                 ob_start( array(&$cache, 'saveToFileCache' ) );
1919                         }
1920                 } else {
1921                         wfDebug( " tryFileCache() - not cacheable\n" );
1922                 }
1923         }
1924
1925         /**
1926          * Check if the page can be cached
1927          * @return bool
1928          */
1929         function isFileCacheable() {
1930                 global $wgUser, $wgUseFileCache, $wgShowIPinHeader, $wgRequest;
1931                 extract( $wgRequest->getValues( 'action', 'oldid', 'diff', 'redirect', 'printable' ) );
1932
1933                 return $wgUseFileCache
1934                         and (!$wgShowIPinHeader)
1935                         and ($this->getID() != 0)
1936                         and ($wgUser->getId() == 0)
1937                         and (!$wgUser->getNewtalk())
1938                         and ($this->mTitle->getNamespace() != NS_SPECIAL )
1939                         and (empty( $action ) || $action == 'view')
1940                         and (!isset($oldid))
1941                         and (!isset($diff))
1942                         and (!isset($redirect))
1943                         and (!isset($printable))
1944                         and (!$this->mRedirectedFrom);
1945         }
1946
1947         /**
1948          * Loads cur_touched and returns a value indicating if it should be used
1949          *
1950          */
1951         function checkTouched() {
1952                 $fname = 'Article::checkTouched';
1953                 $id = $this->getID();
1954                 $dbr =& $this->getDB();
1955                 $s = $dbr->selectRow( 'cur', array( 'cur_touched', 'cur_is_redirect' ),
1956                         array( 'cur_id' => $id ), $fname, $this->getSelectOptions() );
1957                 if( $s !== false ) {
1958                         $this->mTouched = wfTimestamp(TS_MW,$s->cur_touched);
1959                         return !$s->cur_is_redirect;
1960                 } else {
1961                         return false;
1962                 }
1963         }
1964
1965         /**
1966          * Edit an article without doing all that other stuff
1967          *
1968          * @param string $text text submitted
1969          * @param string $comment comment submitted
1970          * @param integer $minor whereas it's a minor modification
1971          */
1972         function quickEdit( $text, $comment = '', $minor = 0 ) {
1973                 global $wgUser;
1974                 $fname = 'Article::quickEdit';
1975                 wfProfileIn( $fname );
1976
1977                 $dbw =& wfGetDB( DB_MASTER );
1978                 $ns = $this->mTitle->getNamespace();
1979                 $dbkey = $this->mTitle->getDBkey();
1980                 $encDbKey = $dbw->strencode( $dbkey );
1981                 $timestamp = wfTimestampNow();
1982
1983                 # Save to history
1984                 $dbw->insertSelect( 'old', 'cur',
1985                         array(
1986                                 'old_namespace' => 'cur_namespace',
1987                                 'old_title' => 'cur_title',
1988                                 'old_text' => 'cur_text',
1989                                 'old_comment' => 'cur_comment',
1990                                 'old_user' => 'cur_user',
1991                                 'old_user_text' => 'cur_user_text',
1992                                 'old_timestamp' => 'cur_timestamp',
1993                                 'inverse_timestamp' => '99999999999999-cur_timestamp',
1994                         ), array(
1995                                 'cur_namespace' => $ns,
1996                                 'cur_title' => $dbkey,
1997                         ), $fname
1998                 );
1999
2000                 # Use the affected row count to determine if the article is new
2001                 $numRows = $dbw->affectedRows();
2002
2003                 # Make an array of fields to be inserted
2004                 $fields = array(
2005                         'cur_text' => $text,
2006                         'cur_timestamp' => $timestamp,
2007                         'cur_user' => $wgUser->getID(),
2008                         'cur_user_text' => $wgUser->getName(),
2009                         'inverse_timestamp' => wfInvertTimestamp( $timestamp ),
2010                         'cur_comment' => $comment,
2011                         'cur_is_redirect' => $this->isRedirect( $text ) ? 1 : 0,
2012                         'cur_minor_edit' => intval($minor),
2013                         'cur_touched' => $dbw->timestamp($timestamp),
2014                 );
2015
2016                 if ( $numRows ) {
2017                         # Update article
2018                         $fields['cur_is_new'] = 0;
2019                         $dbw->update( 'cur', $fields, array( 'cur_namespace' => $ns, 'cur_title' => $dbkey ), $fname );
2020                 } else {
2021                         # Insert new article
2022                         $fields['cur_is_new'] = 1;
2023                         $fields['cur_namespace'] = $ns;
2024                         $fields['cur_title'] = $dbkey;
2025                         $fields['cur_random'] = $rand = wfRandom();
2026                         $dbw->insert( 'cur', $fields, $fname );
2027                 }
2028                 wfProfileOut( $fname );
2029         }
2030
2031         /**
2032          * Used to increment the view counter
2033          *
2034          * @static
2035          * @param integer $id article id
2036          */
2037         function incViewCount( $id ) {
2038                 $id = intval( $id );
2039                 global $wgHitcounterUpdateFreq;
2040
2041                 $dbw =& wfGetDB( DB_MASTER );
2042                 $curTable = $dbw->tableName( 'cur' );
2043                 $hitcounterTable = $dbw->tableName( 'hitcounter' );
2044                 $acchitsTable = $dbw->tableName( 'acchits' );
2045
2046                 if( $wgHitcounterUpdateFreq <= 1 ){ //
2047                         $dbw->query( "UPDATE $curTable SET cur_counter = cur_counter + 1 WHERE cur_id = $id" );
2048                         return;
2049                 }
2050
2051                 # Not important enough to warrant an error page in case of failure
2052                 $oldignore = $dbw->ignoreErrors( true );
2053
2054                 $dbw->query( "INSERT INTO $hitcounterTable (hc_id) VALUES ({$id})" );
2055
2056                 $checkfreq = intval( $wgHitcounterUpdateFreq/25 + 1 );
2057                 if( (rand() % $checkfreq != 0) or ($dbw->lastErrno() != 0) ){
2058                         # Most of the time (or on SQL errors), skip row count check
2059                         $dbw->ignoreErrors( $oldignore );
2060                         return;
2061                 }
2062
2063                 $res = $dbw->query("SELECT COUNT(*) as n FROM $hitcounterTable");
2064                 $row = $dbw->fetchObject( $res );
2065                 $rown = intval( $row->n );
2066                 if( $rown >= $wgHitcounterUpdateFreq ){
2067                         wfProfileIn( 'Article::incViewCount-collect' );
2068                         $old_user_abort = ignore_user_abort( true );
2069
2070                         $dbw->query("LOCK TABLES $hitcounterTable WRITE");
2071                         $dbw->query("CREATE TEMPORARY TABLE $acchitsTable TYPE=HEAP ".
2072                                 "SELECT hc_id,COUNT(*) AS hc_n FROM $hitcounterTable ".
2073                                 'GROUP BY hc_id');
2074                         $dbw->query("DELETE FROM $hitcounterTable");
2075                         $dbw->query('UNLOCK TABLES');
2076                         $dbw->query("UPDATE $curTable,$acchitsTable SET cur_counter=cur_counter + hc_n ".
2077                                 'WHERE cur_id = hc_id');
2078                         $dbw->query("DROP TABLE $acchitsTable");
2079
2080                         ignore_user_abort( $old_user_abort );
2081                         wfProfileOut( 'Article::incViewCount-collect' );
2082                 }
2083                 $dbw->ignoreErrors( $oldignore );
2084         }
2085
2086         /**#@+
2087          * The onArticle*() functions are supposed to be a kind of hooks
2088          * which should be called whenever any of the specified actions
2089          * are done.
2090          *
2091          * This is a good place to put code to clear caches, for instance.
2092          *
2093          * This is called on page move and undelete, as well as edit
2094          * @static
2095          * @param $title_obj a title object
2096          */
2097
2098         function onArticleCreate($title_obj) {
2099                 global $wgUseSquid, $wgDeferredUpdateList;
2100
2101                 $titles = $title_obj->getBrokenLinksTo();
2102
2103                 # Purge squid
2104                 if ( $wgUseSquid ) {
2105                         $urls = $title_obj->getSquidURLs();
2106                         foreach ( $titles as $linkTitle ) {
2107                                 $urls[] = $linkTitle->getInternalURL();
2108                         }
2109                         $u = new SquidUpdate( $urls );
2110                         array_push( $wgDeferredUpdateList, $u );
2111                 }
2112
2113                 # Clear persistent link cache
2114                 LinkCache::linksccClearBrokenLinksTo( $title_obj->getPrefixedDBkey() );
2115         }
2116
2117         function onArticleDelete($title_obj) {
2118                 LinkCache::linksccClearLinksTo( $title_obj->getArticleID() );
2119         }
2120         function onArticleEdit($title_obj) {
2121                 LinkCache::linksccClearPage( $title_obj->getArticleID() );
2122         }
2123         /**#@-*/
2124
2125         /**
2126          * Info about this page
2127          */
2128         function info() {
2129                 global $wgUser, $wgTitle, $wgOut, $wgAllowPageInfo;
2130                 $fname = 'Article::info';
2131
2132                 if ( !$wgAllowPageInfo ) {
2133                         $wgOut->errorpage( 'nosuchaction', 'nosuchactiontext' );
2134                         return;
2135                 }
2136
2137                 $dbr =& $this->getDB();
2138
2139                 $basenamespace = $wgTitle->getNamespace() & (~1);
2140                 $cur_clause = array( 'cur_title' => $wgTitle->getDBkey(), 'cur_namespace' => $basenamespace );
2141                 $old_clause = array( 'old_title' => $wgTitle->getDBkey(), 'old_namespace' => $basenamespace );
2142                 $wl_clause  = array( 'wl_title' => $wgTitle->getDBkey(), 'wl_namespace' => $basenamespace );
2143                 $fullTitle = $wgTitle->makeName($basenamespace, $wgTitle->getDBKey());
2144                 $wgOut->setPagetitle(  $fullTitle );
2145                 $wgOut->setSubtitle( wfMsg( 'infosubtitle' ));
2146
2147                 # first, see if the page exists at all.
2148                 $exists = $dbr->selectField( 'cur', 'COUNT(*)', $cur_clause, $fname, $this->getSelectOptions() );
2149                 if ($exists < 1) {
2150                         $wgOut->addHTML( wfMsg('noarticletext') );
2151                 } else {
2152                         $numwatchers = $dbr->selectField( 'watchlist', 'COUNT(*)', $wl_clause, $fname,
2153                                 $this->getSelectOptions() );
2154                         $wgOut->addHTML( "<ul><li>" . wfMsg("numwatchers", $numwatchers) . '</li>' );
2155                         $old = $dbr->selectField( 'old', 'COUNT(*)', $old_clause, $fname, $this->getSelectOptions() );
2156                         $wgOut->addHTML( "<li>" . wfMsg('numedits', $old + 1) . '</li>');
2157
2158                         # to find number of distinct authors, we need to do some
2159                         # funny stuff because of the cur/old table split:
2160                         # - first, find the name of the 'cur' author
2161                         # - then, find the number of *other* authors in 'old'
2162
2163                         # find 'cur' author
2164                         $cur_author = $dbr->selectField( 'cur', 'cur_user_text', $cur_clause, $fname,
2165                                 $this->getSelectOptions() );
2166
2167                         # find number of 'old' authors excluding 'cur' author
2168                         $authors = $dbr->selectField( 'old', 'COUNT(DISTINCT old_user_text)',
2169                                 $old_clause + array( 'old_user_text<>' . $dbr->addQuotes( $cur_author ) ), $fname,
2170                                 $this->getSelectOptions() ) + 1;
2171
2172                         # now for the Talk page ...
2173                         $cur_clause = array( 'cur_title' => $wgTitle->getDBkey(), 'cur_namespace' => $basenamespace+1 );
2174                         $old_clause = array( 'old_title' => $wgTitle->getDBkey(), 'old_namespace' => $basenamespace+1 );
2175
2176                         # does it exist?
2177                         $exists = $dbr->selectField( 'cur', 'COUNT(*)', $cur_clause, $fname, $this->getSelectOptions() );
2178
2179                         # number of edits
2180                         if ($exists > 0) {
2181                                 $old = $dbr->selectField( 'old', 'COUNT(*)', $old_clause, $fname, $this->getSelectOptions() );
2182                                 $wgOut->addHTML( '<li>' . wfMsg("numtalkedits", $old + 1) . '</li>');
2183                         }
2184                         $wgOut->addHTML( '<li>' . wfMsg("numauthors", $authors) . '</li>' );
2185
2186                         # number of authors
2187                         if ($exists > 0) {
2188                                 $cur_author = $dbr->selectField( 'cur', 'cur_user_text', $cur_clause, $fname,
2189                                         $this->getSelectOptions() );
2190                                 $authors = $dbr->selectField( 'cur', 'COUNT(DISTINCT old_user_text)',
2191                                         $old_clause + array( 'old_user_text<>' . $dbr->addQuotes( $cur_author ) ),
2192                                         $fname, $this->getSelectOptions() );
2193
2194                                 $wgOut->addHTML( '<li>' . wfMsg('numtalkauthors', $authors) . '</li></ul>' );
2195                         }
2196                 }
2197         }
2198 }
2199
2200 ?>