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                 $fname = 'Article::getRevisionText';
  73                 wfProfileIn( $fname );
  74
  75                 # Get data
  76                 $textField = $prefix . 'text';
  77                 $flagsField = $prefix . 'flags';
  78
  79                 if( isset( $row->$flagsField ) ) {
  80                         $flags = explode( ',', $row->$flagsField );
  81                 } else {
  82                         $flags = array();
  83                 }
  84
  85                 if( isset( $row->$textField ) ) {
  86                         $text = $row->$textField;
  87                 } else {
  88                         return false;
  89                 }
  90
  91                 if( in_array( 'gzip', $flags ) ) {
  92                         # Deal with optional compression of archived pages.
  93                         # This can be done periodically via maintenance/compressOld.php, and
  94                         # as pages are saved if $wgCompressRevisions is set.
  95                         $text = gzinflate( $text );
  96                 }
  97
  98                 if( in_array( 'object', $flags ) ) {
  99                         # Generic compressed storage
 100                         $obj = unserialize( $text );
 101
 102                         # Bugger, corrupted my test database by double-serializing
 103                         if ( !is_object( $obj ) ) {
 104                                 $obj = unserialize( $obj );
 105                         }
 106
 107                         $text = $obj->getText();
 108                 }
 109
 110                 global $wgLegacyEncoding;
 111                 if( $wgLegacyEncoding && !in_array( 'utf-8', $flags ) ) {
 112                         # Old revisions kept around in a legacy encoding?
 113                         # Upconvert on demand.
 114                         global $wgInputEncoding, $wgContLang;
 115                         $text = $wgContLang->iconv( $wgLegacyEncoding, $wgInputEncoding, $text );
 116                 }
 117                 wfProfileOut( $fname );
 118                 return $text;
 119         }
 120
 121         /**
 122          * If $wgCompressRevisions is enabled, we will compress data.
 123          * The input string is modified in place.
 124          * Return value is the flags field: contains 'gzip' if the
 125          * data is compressed, and 'utf-8' if we're saving in UTF-8
 126          * mode.
 127          *
 128          * @static
 129          * @param mixed $text reference to a text
 130          * @return string
 131          */
 132         function compressRevisionText( &$text ) {
 133                 global $wgCompressRevisions, $wgUseLatin1;
 134                 $flags = array();
 135                 if( !$wgUseLatin1 ) {
 136                         # Revisions not marked this way will be converted
 137                         # on load if $wgLegacyCharset is set in the future.
 138                         $flags[] = 'utf-8';
 139                 }
 140                 if( $wgCompressRevisions ) {
 141                         if( function_exists( 'gzdeflate' ) ) {
 142                                 $text = gzdeflate( $text );
 143                                 $flags[] = 'gzip';
 144                         } else {
 145                                 wfDebug( "Article::compressRevisionText() -- no zlib support, not compressing\n" );
 146                         }
 147                 }
 148                 return implode( ',', $flags );
 149         }
 150
 151         /**
 152          * Note that getContent/loadContent may follow redirects if
 153          * not told otherwise, and so may cause a change to mTitle.
 154          *
 155          * @param $noredir
 156          * @return Return the text of this revision
 157         */
 158         function getContent( $noredir ) {
 159                 global $wgRequest;
 160
 161                 # Get variables from query string :P
 162                 $action = $wgRequest->getText( 'action', 'view' );
 163                 $section = $wgRequest->getText( 'section' );
 164
 165                 $fname =  'Article::getContent';
 166                 wfProfileIn( $fname );
 167
 168                 if ( 0 == $this->getID() ) {
 169                         if ( 'edit' == $action ) {
 170                                 wfProfileOut( $fname );
 171                                 return ''; # was "newarticletext", now moved above the box)
 172                         }
 173                         wfProfileOut( $fname );
 174                         return wfMsg( 'noarticletext' );
 175                 } else {
 176                         $this->loadContent( $noredir );
 177                         # check if we're displaying a [[User talk:x.x.x.x]] anonymous talk page
 178                         if ( $this->mTitle->getNamespace() == NS_USER_TALK &&
 179                           preg_match('/^\d{1,3}\.\d{1,3}.\d{1,3}\.\d{1,3}$/',$this->mTitle->getText()) &&
 180                           $action=='view'
 181                         ) {
 182                                 wfProfileOut( $fname );
 183                                 return $this->mContent . "\n" .wfMsg('anontalkpagetext');
 184                         } else {
 185                                 if($action=='edit') {
 186                                         if($section!='') {
 187                                                 if($section=='new') {
 188                                                         wfProfileOut( $fname );
 189                                                         return '';
 190                                                 }
 191
 192                                                 # strip NOWIKI etc. to avoid confusion (true-parameter causes HTML
 193                                                 # comments to be stripped as well)
 194                                                 $rv=$this->getSection($this->mContent,$section);
 195                                                 wfProfileOut( $fname );
 196                                                 return $rv;
 197                                         }
 198                                 }
 199                                 wfProfileOut( $fname );
 200                                 return $this->mContent;
 201                         }
 202                 }
 203         }
 204
 205         /**
 206          * This function returns the text of a section, specified by a number ($section).
 207          * A section is text under a heading like == Heading == or <h1>Heading</h1>, or
 208          * the first section before any such heading (section 0).
 209          *
 210          * If a section contains subsections, these are also returned.
 211          *
 212          * @param string $text text to look in
 213          * @param integer $section section number
 214          * @return string text of the requested section
 215          */
 216         function getSection($text,$section) {
 217
 218                 # strip NOWIKI etc. to avoid confusion (true-parameter causes HTML
 219                 # comments to be stripped as well)
 220                 $striparray=array();
 221                 $parser=new Parser();
 222                 $parser->mOutputType=OT_WIKI;
 223                 $striptext=$parser->strip($text, $striparray, true);
 224
 225                 # now that we can be sure that no pseudo-sections are in the source,
 226                 # split it up by section
 227                 $secs =
 228                   preg_split(
 229                   '/(^=+.+?=+|^<h[1-6].*?' . '>.*?<\/h[1-6].*?' . '>)(?!\S)/mi',
 230                   $striptext, -1,
 231                   PREG_SPLIT_DELIM_CAPTURE);
 232                 if($section==0) {
 233                         $rv=$secs[0];
 234                 } else {
 235                         $headline=$secs[$section*2-1];
 236                         preg_match( '/^(=+).+?=+|^<h([1-6]).*?' . '>.*?<\/h[1-6].*?' . '>(?!\S)/mi',$headline,$matches);
 237                         $hlevel=$matches[1];
 238
 239                         # translate wiki heading into level
 240                         if(strpos($hlevel,'=')!==false) {
 241                                 $hlevel=strlen($hlevel);
 242                         }
 243
 244                         $rv=$headline. $secs[$section*2];
 245                         $count=$section+1;
 246
 247                         $break=false;
 248                         while(!empty($secs[$count*2-1]) && !$break) {
 249
 250                                 $subheadline=$secs[$count*2-1];
 251                                 preg_match( '/^(=+).+?=+|^<h([1-6]).*?' . '>.*?<\/h[1-6].*?' . '>(?!\S)/mi',$subheadline,$matches);
 252                                 $subhlevel=$matches[1];
 253                                 if(strpos($subhlevel,'=')!==false) {
 254                                         $subhlevel=strlen($subhlevel);
 255                                 }
 256                                 if($subhlevel > $hlevel) {
 257                                         $rv.=$subheadline.$secs[$count*2];
 258                                 }
 259                                 if($subhlevel <= $hlevel) {
 260                                         $break=true;
 261                                 }
 262                                 $count++;
 263
 264                         }
 265                 }
 266                 # reinsert stripped tags
 267                 $rv=$parser->unstrip($rv,$striparray);
 268                 $rv=$parser->unstripNoWiki($rv,$striparray);
 269                 $rv=trim($rv);
 270                 return $rv;
 271
 272         }
 273
 274         /**
 275          * Return an array of the columns of the "cur"-table
 276          */
 277         function &getCurContentFields() {
 278                 global $wgArticleCurContentFields;
 279                 if ( !$wgArticleCurContentFields ) {
 280                         $wgArticleCurContentFields = array( 'cur_text','cur_timestamp','cur_user', 'cur_user_text',
 281                           'cur_comment','cur_counter','cur_restrictions','cur_touched' );
 282                 }
 283                 return $wgArticleCurContentFields;
 284         }
 285
 286         /**
 287          * Return an array of the columns of the "old"-table
 288          */
 289         function &getOldContentFields() {
 290                 global $wgArticleOldContentFields;
 291                 if ( !$wgArticleOldContentFields ) {
 292                         $wgArticleOldContentFields = array( 'old_namespace','old_title','old_text','old_timestamp',
 293                           'old_user','old_user_text','old_comment','old_flags' );
 294                 }
 295                 return $wgArticleOldContentFields;
 296         }
 297
 298         /**
 299          * Return the oldid of the article that is to be shown.
 300          * For requests with a "direction", this is not the oldid of the
 301          * query
 302          */
 303         function getOldID() {
 304                 global $wgRequest, $wgOut;
 305                 static $lastid;
 306
 307                 if ( isset( $lastid ) ) {
 308                         return $lastid;
 309                 }
 310
 311                 $oldid = $wgRequest->getVal( 'oldid' );
 312                 if ( isset( $oldid ) ) {
 313                         $dbr =& $this->getDB();
 314                         $oldid = IntVal( $oldid );
 315                         if ( $wgRequest->getVal( 'direction' ) == 'next' ) {
 316                                 $nextid = $this->mTitle->getNextRevisionID( $oldid );
 317                                 if ( $nextid ) {
 318                                         $oldid = $nextid;
 319                                 } else {
 320                                         $wgOut->redirect( $this->mTitle->getFullURL( 'redirect=no' ) );
 321                                 }
 322                         } elseif ( $wgRequest->getVal( 'direction' ) == 'prev' ) {
 323                                 $previd = $this->mTitle->getPreviousRevisionID( $oldid );
 324                                 if ( $previd ) {
 325                                         $oldid = $previd;
 326                                 } else {
 327                                         # TODO
 328                                 }
 329                         }
 330                         $lastid = $oldid;
 331                 }
 332                 return @$oldid; # "@" to be able to return "unset" without PHP complaining
 333         }
 334
 335
 336         /**
 337          * Load the revision (including cur_text) into this object
 338         */
 339         function loadContent( $noredir = false ) {
 340                 global $wgOut, $wgRequest;
 341
 342                 if ( $this->mContentLoaded ) return;
 343
 344                 $dbr =& $this->getDB();
 345                 # Query variables :P
 346                 $oldid = $this->getOldID();
 347                 $redirect = $wgRequest->getVal( 'redirect' );
 348
 349                 $fname = 'Article::loadContent';
 350
 351                 # Pre-fill content with error message so that if something
 352                 # fails we'll have something telling us what we intended.
 353
 354                 $t = $this->mTitle->getPrefixedText();
 355
 356                 if ( isset( $oldid ) ) {
 357                         $t .= ',oldid='.$oldid;
 358                 }
 359                 if ( isset( $redirect ) ) {
 360                         $redirect = ($redirect == 'no') ? 'no' : 'yes';
 361                         $t .= ',redirect='.$redirect;
 362                 }
 363                 $this->mContent = wfMsg( 'missingarticle', $t );
 364
 365                 if ( ! $oldid ) {       # Retrieve current version
 366                         $id = $this->getID();
 367                         if ( 0 == $id ) return;
 368
 369                         $s = $dbr->selectRow( 'cur', $this->getCurContentFields(), array( 'cur_id' => $id ), $fname,
 370                                 $this->getSelectOptions() );
 371                         if ( $s === false ) {
 372                                 return;
 373                         }
 374
 375                         # If we got a redirect, follow it (unless we've been told
 376                         # not to by either the function parameter or the query
 377                         if ( ( 'no' != $redirect ) && ( false == $noredir ) ) {
 378                                 $rt = Title::newFromRedirect( $s->cur_text );
 379                                 # process if title object is valid and not special:userlogout
 380                                 if ( $rt && ! ( $rt->getNamespace() == NS_SPECIAL && $rt->getText() == 'Userlogout' ) ) {
 381                                         # Gotta hand redirects to special pages differently:
 382                                         # Fill the HTTP response "Location" header and ignore
 383                                         # the rest of the page we're on.
 384
 385                                         if ( $rt->getInterwiki() != '' ) {
 386                                                 $wgOut->redirect( $rt->getFullURL() ) ;
 387                                                 return;
 388                                         }
 389                                         if ( $rt->getNamespace() == NS_SPECIAL ) {
 390                                                 $wgOut->redirect( $rt->getFullURL() );
 391                                                 return;
 392                                         }
 393                                         $rid = $rt->getArticleID();
 394                                         if ( 0 != $rid ) {
 395                                                 $redirRow = $dbr->selectRow( 'cur', $this->getCurContentFields(),
 396                                                         array( 'cur_id' => $rid ), $fname, $this->getSelectOptions() );
 397
 398                                                 if ( $redirRow !== false ) {
 399                                                         $this->mRedirectedFrom = $this->mTitle->getPrefixedText();
 400                                                         $this->mTitle = $rt;
 401                                                         $s = $redirRow;
 402                                                 }
 403                                         }
 404                                 }
 405                         }
 406
 407                         $this->mContent = $s->cur_text;
 408                         $this->mUser = $s->cur_user;
 409                         $this->mUserText = $s->cur_user_text;
 410                         $this->mComment = $s->cur_comment;
 411                         $this->mCounter = $s->cur_counter;
 412                         $this->mTimestamp = wfTimestamp(TS_MW,$s->cur_timestamp);
 413                         $this->mTouched = wfTimestamp(TS_MW,$s->cur_touched);
 414                         $this->mTitle->loadRestrictions( $s->cur_restrictions );
 415                 } else { # oldid set, retrieve historical version
 416                         $s = $dbr->selectRow( 'old', $this->getOldContentFields(), array( 'old_id' => $oldid ),
 417                                 $fname, $this->getSelectOptions() );
 418                         if ( $s === false ) {
 419                                 return;
 420                         }
 421
 422                         if( $this->mTitle->getNamespace() != $s->old_namespace ||
 423                                 $this->mTitle->getDBkey() != $s->old_title ) {
 424                                 $oldTitle = Title::makeTitle( $s->old_namesapce, $s->old_title );
 425                                 $this->mTitle = $oldTitle;
 426                                 $wgTitle = $oldTitle;
 427                         }
 428                         $this->mContent = Article::getRevisionText( $s );
 429                         $this->mUser = $s->old_user;
 430                         $this->mUserText = $s->old_user_text;
 431                         $this->mComment = $s->old_comment;
 432                         $this->mCounter = 0;
 433                         $this->mTimestamp = wfTimestamp(TS_MW,$s->old_timestamp);
 434                 }
 435                 $this->mContentLoaded = true;
 436                 return $this->mContent;
 437         }
 438
 439         /**
 440          * Gets the article text without using so many damn globals
 441          * Returns false on error
 442          *
 443          * @param integer $oldid
 444          */
 445         function getContentWithoutUsingSoManyDamnGlobals( $oldid = 0, $noredir = false ) {
 446                 if ( $this->mContentLoaded ) {
 447                         return $this->mContent;
 448                 }
 449                 $this->mContent = false;
 450
 451                 $fname = 'Article::getContentWithout';
 452                 $dbr =& $this->getDB();
 453
 454                 if ( ! $oldid ) {       # Retrieve current version
 455                         $id = $this->getID();
 456                         if ( 0 == $id ) {
 457                                 return false;
 458                         }
 459
 460                         $s = $dbr->selectRow( 'cur', $this->getCurContentFields(), array( 'cur_id' => $id ),
 461                                 $fname, $this->getSelectOptions() );
 462                         if ( $s === false ) {
 463                                 return false;
 464                         }
 465
 466                         # If we got a redirect, follow it (unless we've been told
 467                         # not to by either the function parameter or the query
 468                         if ( !$noredir ) {
 469                                 $rt = Title::newFromRedirect( $s->cur_text );
 470                                 if( $rt &&  $rt->getInterwiki() == '' && $rt->getNamespace() != NS_SPECIAL ) {
 471                                         $rid = $rt->getArticleID();
 472                                         if ( 0 != $rid ) {
 473                                                 $redirRow = $dbr->selectRow( 'cur', $this->getCurContentFields(),
 474                                                         array( 'cur_id' => $rid ), $fname, $this->getSelectOptions() );
 475
 476                                                 if ( $redirRow !== false ) {
 477                                                         $this->mRedirectedFrom = $this->mTitle->getPrefixedText();
 478                                                         $this->mTitle = $rt;
 479                                                         $s = $redirRow;
 480                                                 }
 481                                         }
 482                                 }
 483                         }
 484
 485                         $this->mContent = $s->cur_text;
 486                         $this->mUser = $s->cur_user;
 487                         $this->mUserText = $s->cur_user_text;
 488                         $this->mComment = $s->cur_comment;
 489                         $this->mCounter = $s->cur_counter;
 490                         $this->mTimestamp = wfTimestamp(TS_MW,$s->cur_timestamp);
 491                         $this->mTouched = wfTimestamp(TS_MW,$s->cur_touched);
 492                         $this->mTitle->loadRestrictions( $s->cur_restrictions );
 493                 } else { # oldid set, retrieve historical version
 494                         $s = $dbr->selectRow( 'old', $this->getOldContentFields(), array( 'old_id' => $oldid ),
 495                                 $fname, $this->getSelectOptions() );
 496                         if ( $s === false ) {
 497                                 return false;
 498                         }
 499                         $this->mContent = Article::getRevisionText( $s );
 500                         $this->mUser = $s->old_user;
 501                         $this->mUserText = $s->old_user_text;
 502                         $this->mComment = $s->old_comment;
 503                         $this->mCounter = 0;
 504                         $this->mTimestamp = wfTimestamp(TS_MW,$s->old_timestamp);
 505                 }
 506                 $this->mContentLoaded = true;
 507                 return $this->mContent;
 508         }
 509
 510         /**
 511          * Read/write accessor to select FOR UPDATE
 512          */
 513         function forUpdate( $x = NULL ) {
 514                 return wfSetVar( $this->mForUpdate, $x );
 515         }
 516
 517         /**
 518          * Get the database which should be used for reads
 519          */
 520         function &getDB() {
 521                 if ( $this->mForUpdate ) {
 522                         return wfGetDB( DB_MASTER );
 523                 } else {
 524                         return wfGetDB( DB_SLAVE );
 525                 }
 526         }
 527
 528         /**
 529          * Get options for all SELECT statements
 530          * Can pass an option array, to which the class-wide options will be appended
 531          */
 532         function getSelectOptions( $options = '' ) {
 533                 if ( $this->mForUpdate ) {
 534                         if ( $options ) {
 535                                 $options[] = 'FOR UPDATE';
 536                         } else {
 537                                 $options = 'FOR UPDATE';
 538                         }
 539                 }
 540                 return $options;
 541         }
 542
 543         /**
 544          * Return the Article ID
 545          */
 546         function getID() {
 547                 if( $this->mTitle ) {
 548                         return $this->mTitle->getArticleID();
 549                 } else {
 550                         return 0;
 551                 }
 552         }
 553
 554         /**
 555          * Get the view count for this article
 556          */
 557         function getCount() {
 558                 if ( -1 == $this->mCounter ) {
 559                         $id = $this->getID();
 560                         $dbr =& $this->getDB();
 561                         $this->mCounter = $dbr->selectField( 'cur', 'cur_counter', 'cur_id='.$id,
 562                                 'Article::getCount', $this->getSelectOptions() );
 563                 }
 564                 return $this->mCounter;
 565         }
 566
 567         /**
 568          * Would the given text make this article a "good" article (i.e.,
 569          * suitable for including in the article count)?
 570          */
 571         function isCountable( $text ) {
 572                 global $wgUseCommaCount;
 573
 574                 if ( 0 != $this->mTitle->getNamespace() ) { return 0; }
 575                 if ( $this->isRedirect( $text ) ) { return 0; }
 576                 $token = ($wgUseCommaCount ? ',' : '[[' );
 577                 if ( false === strstr( $text, $token ) ) { return 0; }
 578                 return 1;
 579         }
 580
 581         /**
 582          * Tests if the article text represents a redirect
 583          */
 584         function isRedirect( $text = false ) {
 585                 if ( $text === false ) {
 586                         $this->loadContent();
 587                         $titleObj = Title::newFromRedirect( $this->mText );
 588                 } else {
 589                         $titleObj = Title::newFromRedirect( $text );
 590                 }
 591                 return $titleObj !== NULL;
 592         }
 593
 594         /**
 595          * Loads everything from cur except cur_text
 596          * This isn't necessary for all uses, so it's only done if needed.
 597          * @private
 598          */
 599         function loadLastEdit() {
 600                 global $wgOut;
 601                 if ( -1 != $this->mUser ) return;
 602
 603                 $fname = 'Article::loadLastEdit';
 604
 605                 $dbr =& $this->getDB();
 606                 $s = $dbr->selectRow( 'cur',
 607                   array( 'cur_user','cur_user_text','cur_timestamp', 'cur_comment','cur_minor_edit' ),
 608                   array( 'cur_id' => $this->getID() ), $fname, $this->getSelectOptions() );
 609
 610                 if ( $s !== false ) {
 611                         $this->mUser = $s->cur_user;
 612                         $this->mUserText = $s->cur_user_text;
 613                         $this->mTimestamp = wfTimestamp(TS_MW,$s->cur_timestamp);
 614                         $this->mComment = $s->cur_comment;
 615                         $this->mMinorEdit = $s->cur_minor_edit;
 616                 }
 617         }
 618
 619         function getTimestamp() {
 620                 $this->loadLastEdit();
 621                 return $this->mTimestamp;
 622         }
 623
 624         function getUser() {
 625                 $this->loadLastEdit();
 626                 return $this->mUser;
 627         }
 628
 629         function getUserText() {
 630                 $this->loadLastEdit();
 631                 return $this->mUserText;
 632         }
 633
 634         function getComment() {
 635                 $this->loadLastEdit();
 636                 return $this->mComment;
 637         }
 638
 639         function getMinorEdit() {
 640                 $this->loadLastEdit();
 641                 return $this->mMinorEdit;
 642         }
 643
 644         function getContributors($limit = 0, $offset = 0) {
 645                 $fname = 'Article::getContributors';
 646
 647                 # XXX: this is expensive; cache this info somewhere.
 648
 649                 $title = $this->mTitle;
 650                 $contribs = array();
 651                 $dbr =& $this->getDB();
 652                 $oldTable = $dbr->tableName( 'old' );
 653                 $userTable = $dbr->tableName( 'user' );
 654                 $encDBkey = $dbr->addQuotes( $title->getDBkey() );
 655                 $ns = $title->getNamespace();
 656                 $user = $this->getUser();
 657
 658                 $sql = "SELECT old_user, old_user_text, user_real_name, MAX(old_timestamp) as timestamp
 659                         FROM $oldTable LEFT JOIN $userTable ON old_user = user_id
 660                         WHERE old_namespace = $user
 661                         AND old_title = $encDBkey
 662                         AND old_user != $user
 663                         GROUP BY old_user, old_user_text, user_real_name
 664                         ORDER BY timestamp DESC";
 665
 666                 if ($limit > 0) { $sql .= ' LIMIT '.$limit; }
 667                 $sql .= ' '. $this->getSelectOptions();
 668
 669                 $res = $dbr->query($sql, $fname);
 670
 671                 while ( $line = $dbr->fetchObject( $res ) ) {
 672                         $contribs[] = array($line->old_user, $line->old_user_text, $line->user_real_name);
 673                 }
 674
 675                 $dbr->freeResult($res);
 676                 return $contribs;
 677         }
 678
 679         /**
 680          * This is the default action of the script: just view the page of
 681          * the given title.
 682         */
 683         function view() {
 684                 global $wgUser, $wgOut, $wgRequest, $wgOnlySysopsCanPatrol, $wgLang;
 685                 global $wgLinkCache, $IP, $wgEnableParserCache, $wgStylePath, $wgUseRCPatrol;
 686                 $sk = $wgUser->getSkin();
 687
 688                 $fname = 'Article::view';
 689                 wfProfileIn( $fname );
 690                 # Get variables from query string
 691                 $oldid = $this->getOldID();
 692                 $diff = $wgRequest->getVal( 'diff' );
 693                 $rcid = $wgRequest->getVal( 'rcid' );
 694
 695                 $wgOut->setArticleFlag( true );
 696                 $wgOut->setRobotpolicy( 'index,follow' );
 697                 # If we got diff and oldid in the query, we want to see a
 698                 # diff page instead of the article.
 699
 700                 if ( !is_null( $diff ) ) {
 701                         require_once( 'DifferenceEngine.php' );
 702                         $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
 703                         $de = new DifferenceEngine( $oldid, $diff, $rcid );
 704                         $de->showDiffPage();
 705                         if( $diff == 0 ) {
 706                                 # Run view updates for current revision only
 707                                 $this->viewUpdates();
 708                         }
 709                         wfProfileOut( $fname );
 710                         return;
 711                 }
 712                 if ( empty( $oldid ) && $this->checkTouched() ) {
 713                         if( $wgOut->checkLastModified( $this->mTouched ) ){
 714                                 wfProfileOut( $fname );
 715                                 return;
 716                         } else if ( $this->tryFileCache() ) {
 717                                 # tell wgOut that output is taken care of
 718                                 $wgOut->disable();
 719                                 $this->viewUpdates();
 720                                 wfProfileOut( $fname );
 721                                 return;
 722                         }
 723                 }
 724                 # Should the parser cache be used?
 725                 if ( $wgEnableParserCache && intval($wgUser->getOption( 'stubthreshold' )) == 0 && empty( $oldid ) ) {
 726                         $pcache = true;
 727                 } else {
 728                         $pcache = false;
 729                 }
 730
 731                 $outputDone = false;
 732                 if ( $pcache ) {
 733                         if ( $wgOut->tryParserCache( $this, $wgUser ) ) {
 734                                 $outputDone = true;
 735                         }
 736                 }
 737                 if ( !$outputDone ) {
 738                         $text = $this->getContent( false ); # May change mTitle by following a redirect
 739
 740                         # Another whitelist check in case oldid or redirects are altering the title
 741                         if ( !$this->mTitle->userCanRead() ) {
 742                                 $wgOut->loginToUse();
 743                                 $wgOut->output();
 744                                 exit;
 745                         }
 746
 747
 748                         # We're looking at an old revision
 749
 750                         if ( !empty( $oldid ) ) {
 751                                 $this->setOldSubtitle( $oldid );
 752                                 $wgOut->setRobotpolicy( 'noindex,follow' );
 753                         }
 754                         if ( '' != $this->mRedirectedFrom ) {
 755                                 $sk = $wgUser->getSkin();
 756                                 $redir = $sk->makeKnownLink( $this->mRedirectedFrom, '',
 757                                   'redirect=no' );
 758                                 $s = wfMsg( 'redirectedfrom', $redir );
 759                                 $wgOut->setSubtitle( $s );
 760
 761                                 # Can't cache redirects
 762                                 $pcache = false;
 763                         }
 764
 765                         # wrap user css and user js in pre and don't parse
 766                         # XXX: use $this->mTitle->usCssJsSubpage() when php is fixed/ a workaround is found
 767                         if (
 768                                 $this->mTitle->getNamespace() == NS_USER &&
 769                                 preg_match('/\\/[\\w]+\\.(css|js)$/', $this->mTitle->getDBkey())
 770                         ) {
 771                                 $wgOut->addWikiText( wfMsg('clearyourcache'));
 772                                 $wgOut->addHTML( '<pre>'.htmlspecialchars($this->mContent)."\n</pre>" );
 773                         } else if ( $rt = Title::newFromRedirect( $text ) ) {
 774                                 # Display redirect
 775                                 $imageUrl = $wgStylePath.'/common/images/redirect.png';
 776                                 $targetUrl = $rt->escapeLocalURL();
 777                                 $titleText = htmlspecialchars( $rt->getPrefixedText() );
 778                                 $link = $sk->makeLinkObj( $rt );
 779
 780                                 $wgOut->addHTML( '<img valign="center" src="'.$imageUrl.'" alt="#REDIRECT" />' .
 781                                   '<span class="redirectText">'.$link.'</span>' );
 782
 783                         } else if ( $pcache ) {
 784                                 # Display content and save to parser cache
 785                                 $wgOut->addPrimaryWikiText( $text, $this );
 786                         } else {
 787                                 # Display content, don't attempt to save to parser cache
 788                                 $wgOut->addWikiText( $text );
 789                         }
 790                 }
 791                 $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
 792                 # If we have been passed an &rcid= parameter, we want to give the user a
 793                 # chance to mark this new article as patrolled.
 794                 if ( $wgUseRCPatrol && !is_null ( $rcid ) && $rcid != 0 && $wgUser->getID() != 0 &&
 795                      ( $wgUser->isAllowed('patrol') || !$wgOnlySysopsCanPatrol ) )
 796                 {
 797                         $wgOut->addHTML( wfMsg ( 'markaspatrolledlink',
 798                                 $sk->makeKnownLinkObj ( $this->mTitle, wfMsg ( 'markaspatrolledtext' ),
 799                                         'action=markpatrolled&rcid='.$rcid )
 800                          ) );
 801                 }
 802
 803                 # Put link titles into the link cache
 804                 $wgOut->transformBuffer();
 805
 806                 # Add link titles as META keywords
 807                 $wgOut->addMetaTags() ;
 808
 809                 $this->viewUpdates();
 810                 wfProfileOut( $fname );
 811         }
 812
 813         /**
 814          * Theoretically we could defer these whole insert and update
 815          * functions for after display, but that's taking a big leap
 816          * of faith, and we want to be able to report database
 817          * errors at some point.
 818          * @private
 819          */
 820         function insertNewArticle( $text, $summary, $isminor, $watchthis ) {
 821                 global $wgOut, $wgUser;
 822                 global $wgUseSquid, $wgDeferredUpdateList, $wgInternalServer;
 823
 824                 $fname = 'Article::insertNewArticle';
 825
 826                 $this->mCountAdjustment = $this->isCountable( $text );
 827
 828                 $ns = $this->mTitle->getNamespace();
 829                 $ttl = $this->mTitle->getDBkey();
 830                 $text = $this->preSaveTransform( $text );
 831                 if ( $this->isRedirect( $text ) ) { $redir = 1; }
 832                 else { $redir = 0; }
 833
 834                 $now = wfTimestampNow();
 835                 $won = wfInvertTimestamp( $now );
 836                 wfSeedRandom();
 837                 $rand = wfRandom();
 838                 $dbw =& wfGetDB( DB_MASTER );
 839
 840                 $cur_id = $dbw->nextSequenceValue( 'cur_cur_id_seq' );
 841
 842                 $isminor = ( $isminor && $wgUser->getID() ) ? 1 : 0;
 843
 844                 $dbw->insert( 'cur', array(
 845                         'cur_id' => $cur_id,
 846                         'cur_namespace' => $ns,
 847                         'cur_title' => $ttl,
 848                         'cur_text' => $text,
 849                         'cur_comment' => $summary,
 850                         'cur_user' => $wgUser->getID(),
 851                         'cur_timestamp' => $dbw->timestamp($now),
 852                         'cur_minor_edit' => $isminor,
 853                         'cur_counter' => 0,
 854                         'cur_restrictions' => '',
 855                         'cur_user_text' => $wgUser->getName(),
 856                         'cur_is_redirect' => $redir,
 857                         'cur_is_new' => 1,
 858                         'cur_random' => $rand,
 859                         'cur_touched' => $dbw->timestamp($now),
 860                         'inverse_timestamp' => $won,
 861                 ), $fname );
 862
 863                 $newid = $dbw->insertId();
 864                 $this->mTitle->resetArticleID( $newid );
 865
 866                 Article::onArticleCreate( $this->mTitle );
 867                 RecentChange::notifyNew( $now, $this->mTitle, $isminor, $wgUser, $summary );
 868
 869                 if ($watchthis) {
 870                         if(!$this->mTitle->userIsWatching()) $this->watch();
 871                 } else {
 872                         if ( $this->mTitle->userIsWatching() ) {
 873                                 $this->unwatch();
 874                         }
 875                 }
 876
 877                 # The talk page isn't in the regular link tables, so we need to update manually:
 878                 $talkns = $ns ^ 1; # talk -> normal; normal -> talk
 879                 $dbw->update( 'cur', array('cur_touched' => $dbw->timestamp($now) ),
 880                         array(  'cur_namespace' => $talkns, 'cur_title' => $ttl ), $fname );
 881
 882                 # standard deferred updates
 883                 $this->editUpdates( $text );
 884
 885                 $this->showArticle( $text, wfMsg( 'newarticle' ) );
 886         }
 887
 888
 889         /**
 890          * Side effects: loads last edit if $edittime is NULL
 891          */
 892         function getTextOfLastEditWithSectionReplacedOrAdded($section, $text, $summary = '', $edittime = NULL) {
 893                 $fname = 'Article::getTextOfLastEditWithSectionReplacedOrAdded';
 894                 if(is_null($edittime)) {
 895                         $this->loadLastEdit();
 896                         $oldtext = $this->getContent( true );
 897                 } else {
 898                         $dbw =& wfGetDB( DB_MASTER );
 899                         $ns = $this->mTitle->getNamespace();
 900                         $title = $this->mTitle->getDBkey();
 901                         $obj = $dbw->selectRow( 'old',
 902                                 array( 'old_text','old_flags'),
 903                                 array( 'old_namespace' => $ns, 'old_title' => $title,
 904                                         'old_timestamp' => $dbw->timestamp($edittime)),
 905                                 $fname );
 906                         $oldtext = Article::getRevisionText( $obj );
 907                 }
 908                 if ($section != '') {
 909                         if($section=='new') {
 910                                 if($summary) $subject="== {$summary} ==\n\n";
 911                                 $text=$oldtext."\n\n".$subject.$text;
 912                         } else {
 913
 914                                 # strip NOWIKI etc. to avoid confusion (true-parameter causes HTML
 915                                 # comments to be stripped as well)
 916                                 $striparray=array();
 917                                 $parser=new Parser();
 918                                 $parser->mOutputType=OT_WIKI;
 919                                 $oldtext=$parser->strip($oldtext, $striparray, true);
 920
 921                                 # now that we can be sure that no pseudo-sections are in the source,
 922                                 # split it up
 923                                 # Unfortunately we can't simply do a preg_replace because that might
 924                                 # replace the wrong section, so we have to use the section counter instead
 925                                 $secs=preg_split('/(^=+.+?=+|^<h[1-6].*?' . '>.*?<\/h[1-6].*?' . '>)(?!\S)/mi',
 926                                   $oldtext,-1,PREG_SPLIT_DELIM_CAPTURE);
 927                                 $secs[$section*2]=$text."\n\n"; // replace with edited
 928
 929                                 # section 0 is top (intro) section
 930                                 if($section!=0) {
 931
 932                                         # headline of old section - we need to go through this section
 933                                         # to determine if there are any subsections that now need to
 934                                         # be erased, as the mother section has been replaced with
 935                                         # the text of all subsections.
 936                                         $headline=$secs[$section*2-1];
 937                                         preg_match( '/^(=+).+?=+|^<h([1-6]).*?' . '>.*?<\/h[1-6].*?' . '>(?!\S)/mi',$headline,$matches);
 938                                         $hlevel=$matches[1];
 939
 940                                         # determine headline level for wikimarkup headings
 941                                         if(strpos($hlevel,'=')!==false) {
 942                                                 $hlevel=strlen($hlevel);
 943                                         }
 944
 945                                         $secs[$section*2-1]=''; // erase old headline
 946                                         $count=$section+1;
 947                                         $break=false;
 948                                         while(!empty($secs[$count*2-1]) && !$break) {
 949
 950                                                 $subheadline=$secs[$count*2-1];
 951                                                 preg_match(
 952                                                  '/^(=+).+?=+|^<h([1-6]).*?' . '>.*?<\/h[1-6].*?' . '>(?!\S)/mi',$subheadline,$matches);
 953                                                 $subhlevel=$matches[1];
 954                                                 if(strpos($subhlevel,'=')!==false) {
 955                                                         $subhlevel=strlen($subhlevel);
 956                                                 }
 957                                                 if($subhlevel > $hlevel) {
 958                                                         // erase old subsections
 959                                                         $secs[$count*2-1]='';
 960                                                         $secs[$count*2]='';
 961                                                 }
 962                                                 if($subhlevel <= $hlevel) {
 963                                                         $break=true;
 964                                                 }
 965                                                 $count++;
 966
 967                                         }
 968
 969                                 }
 970                                 $text=join('',$secs);
 971                                 # reinsert the stuff that we stripped out earlier
 972                                 $text=$parser->unstrip($text,$striparray);
 973                                 $text=$parser->unstripNoWiki($text,$striparray);
 974                         }
 975
 976                 }
 977                 return $text;
 978         }
 979
 980         /**
 981          * Change an existing article. Puts the previous version back into the old table, updates RC
 982          * and all necessary caches, mostly via the deferred update array.
 983          *
 984          * It is possible to call this function from a command-line script, but note that you should
 985          * first set $wgUser, and clean up $wgDeferredUpdates after each edit.
 986          */
 987         function updateArticle( $text, $summary, $minor, $watchthis, $forceBot = false, $sectionanchor = '' ) {
 988                 global $wgOut, $wgUser;
 989                 global $wgDBtransactions, $wgMwRedir;
 990                 global $wgUseSquid, $wgInternalServer;
 991
 992                 $fname = 'Article::updateArticle';
 993                 $good = true;
 994
 995                 if ( $this->mMinorEdit ) { $me1 = 1; } else { $me1 = 0; }
 996                 if ( $minor && $wgUser->getID() ) { $me2 = 1; } else { $me2 = 0; }
 997                 if ( $this->isRedirect( $text ) ) {
 998                         # Remove all content but redirect
 999                         # This could be done by reconstructing the redirect from a title given by
1000                         # Title::newFromRedirect(), but then we wouldn't know which synonym the user
1001                         # wants to see
1002                         if ( preg_match( "/^((" . $wgMwRedir->getBaseRegex() . ')[^\\n]+)/i', $text, $m ) ) {
1003                                 $redir = 1;
1004                                 $text = $m[1] . "\n";
1005                         }
1006                 }
1007                 else { $redir = 0; }
1008
1009                 $text = $this->preSaveTransform( $text );
1010                 $dbw =& wfGetDB( DB_MASTER );
1011
1012                 # Update article, but only if changed.
1013
1014                 # It's important that we either rollback or complete, otherwise an attacker could
1015                 # overwrite cur entries by sending precisely timed user aborts. Random bored users
1016                 # could conceivably have the same effect, especially if cur is locked for long periods.
1017                 if( $wgDBtransactions ) {
1018                         $dbw->query( 'BEGIN', $fname );
1019                 } else {
1020                         $userAbort = ignore_user_abort( true );
1021                 }
1022
1023                 $oldtext = $this->getContent( true );
1024
1025                 if ( 0 != strcmp( $text, $oldtext ) ) {
1026                         $this->mCountAdjustment = $this->isCountable( $text )
1027                           - $this->isCountable( $oldtext );
1028                         $now = wfTimestampNow();
1029                         $won = wfInvertTimestamp( $now );
1030
1031                         # First update the cur row
1032                         $dbw->update( 'cur',
1033                                 array( /* SET */
1034                                         'cur_text' => $text,
1035                                         'cur_comment' => $summary,
1036                                         'cur_minor_edit' => $me2,
1037                                         'cur_user' => $wgUser->getID(),
1038                                         'cur_timestamp' => $dbw->timestamp($now),
1039                                         'cur_user_text' => $wgUser->getName(),
1040                                         'cur_is_redirect' => $redir,
1041                                         'cur_is_new' => 0,
1042                                         'cur_touched' => $dbw->timestamp($now),
1043                                         'inverse_timestamp' => $won
1044                                 ), array( /* WHERE */
1045                                         'cur_id' => $this->getID(),
1046                                         'cur_timestamp' => $dbw->timestamp($this->getTimestamp())
1047                                 ), $fname
1048                         );
1049
1050                         if( $dbw->affectedRows() == 0 ) {
1051                                 /* Belated edit conflict! Run away!! */
1052                                 $good = false;
1053                         } else {
1054                                 # Now insert the previous revision into old
1055
1056                                 # This overwrites $oldtext if revision compression is on
1057                                 $flags = Article::compressRevisionText( $oldtext );
1058
1059                                 $dbw->insert( 'old',
1060                                         array(
1061                                                 'old_id' => $dbw->nextSequenceValue( 'old_old_id_seq' ),
1062                                                 'old_namespace' => $this->mTitle->getNamespace(),
1063                                                 'old_title' => $this->mTitle->getDBkey(),
1064                                                 'old_text' => $oldtext,
1065                                                 'old_comment' => $this->getComment(),
1066                                                 'old_user' => $this->getUser(),
1067                                                 'old_user_text' => $this->getUserText(),
1068                                                 'old_timestamp' => $dbw->timestamp($this->getTimestamp()),
1069                                                 'old_minor_edit' => $me1,
1070                                                 'inverse_timestamp' => wfInvertTimestamp( $this->getTimestamp() ),
1071                                                 'old_flags' => $flags,
1072                                         ), $fname
1073                                 );
1074
1075                                 $oldid = $dbw->insertId();
1076
1077                                 $bot = (int)($wgUser->isBot() || $forceBot);
1078                                 RecentChange::notifyEdit( $now, $this->mTitle, $me2, $wgUser, $summary,
1079                                         $oldid, $this->getTimestamp(), $bot );
1080                                 Article::onArticleEdit( $this->mTitle );
1081                         }
1082                 }
1083
1084                 if( $wgDBtransactions ) {
1085                         $dbw->query( 'COMMIT', $fname );
1086                 } else {
1087                         ignore_user_abort( $userAbort );
1088                 }
1089
1090                 if ( $good ) {
1091                 if ($watchthis) {
1092                         if (!$this->mTitle->userIsWatching()) $this->watch();
1093                 } else {
1094                         if ( $this->mTitle->userIsWatching() ) {
1095                                 $this->unwatch();
1096                         }
1097                 }
1098                 # standard deferred updates
1099                 $this->editUpdates( $text );
1100
1101
1102                 $urls = array();
1103                 # Template namespace
1104                 # Purge all articles linking here
1105                 if ( $this->mTitle->getNamespace() == NS_TEMPLATE) {
1106                         $titles = $this->mTitle->getLinksTo();
1107                         Title::touchArray( $titles );
1108                         if ( $wgUseSquid ) {
1109                                         foreach ( $titles as $title ) {
1110                                                 $urls[] = $title->getInternalURL();
1111                                         }
1112                         }
1113                 }
1114
1115                 # Squid updates
1116                 if ( $wgUseSquid ) {
1117                         $urls = array_merge( $urls, $this->mTitle->getSquidURLs() );
1118                         $u = new SquidUpdate( $urls );
1119                         $u->doUpdate();
1120                 }
1121
1122                 $this->showArticle( $text, wfMsg( 'updated' ), $sectionanchor );
1123                 }
1124                 return $good;
1125         }
1126
1127         /**
1128          * After we've either updated or inserted the article, update
1129          * the link tables and redirect to the new page.
1130          */
1131         function showArticle( $text, $subtitle , $sectionanchor = '' ) {
1132                 global $wgOut, $wgUser, $wgLinkCache;
1133
1134                 $wgLinkCache = new LinkCache();
1135                 # Select for update
1136                 $wgLinkCache->forUpdate( true );
1137
1138                 # Get old version of link table to allow incremental link updates
1139                 $wgLinkCache->preFill( $this->mTitle );
1140                 $wgLinkCache->clear();
1141
1142                 # Parse the text and replace links with placeholders
1143                 $wgOut = new OutputPage();
1144                 $wgOut->addWikiText( $text );
1145
1146                 # Look up the links in the DB and add them to the link cache
1147                 $wgOut->transformBuffer( RLH_FOR_UPDATE );
1148
1149                 if( $this->isRedirect( $text ) )
1150                         $r = 'redirect=no';
1151                 else
1152                         $r = '';
1153                 $wgOut->redirect( $this->mTitle->getFullURL( $r ).$sectionanchor );
1154         }
1155
1156         /**
1157          * Validate article
1158          * @todo document this function a bit more
1159          */
1160         function validate () {
1161                 global $wgOut, $wgUseValidation;
1162                 if( $wgUseValidation ) {
1163                         require_once ( 'SpecialValidate.php' ) ;
1164                         $wgOut->setPagetitle( wfMsg( 'validate' ) . ': ' . $this->mTitle->getPrefixedText() );
1165                         $wgOut->setRobotpolicy( 'noindex,follow' );
1166                         if( $this->mTitle->getNamespace() != 0 ) {
1167                                 $wgOut->addHTML( wfMsg( 'val_validate_article_namespace_only' ) );
1168                                 return;
1169                         }
1170                         $v = new Validation;
1171                         $v->validate_form( $this->mTitle->getDBkey() );
1172                 } else {
1173                         $wgOut->errorpage( 'nosuchaction', 'nosuchactiontext' );
1174                 }
1175         }
1176
1177         /**
1178          * Mark this particular edit as patrolled
1179          */
1180         function markpatrolled() {
1181                 global $wgOut, $wgRequest, $wgOnlySysopsCanPatrol, $wgUseRCPatrol, $wgUser;
1182                 $wgOut->setRobotpolicy( 'noindex,follow' );
1183
1184                 if ( !$wgUseRCPatrol )
1185                 {
1186                         $wgOut->errorpage( 'rcpatroldisabled', 'rcpatroldisabledtext' );
1187                         return;
1188                 }
1189                 if ( $wgUser->getID() == 0 )
1190                 {
1191                         $wgOut->loginToUse();
1192                         return;
1193                 }
1194                 if ( $wgOnlySysopsCanPatrol && !$wgUser->isAllowed('patrol') )
1195                 {
1196                         $wgOut->sysopRequired();
1197                         return;
1198                 }
1199                 $rcid = $wgRequest->getVal( 'rcid' );
1200                 if ( !is_null ( $rcid ) )
1201                 {
1202                         RecentChange::markPatrolled( $rcid );
1203                         $wgOut->setPagetitle( wfMsg( 'markedaspatrolled' ) );
1204                         $wgOut->addWikiText( wfMsg( 'markedaspatrolledtext' ) );
1205                         $wgOut->returnToMain( true, $this->mTitle->getPrefixedText() );
1206                 }
1207                 else
1208                 {
1209                         $wgOut->errorpage( 'markedaspatrollederror', 'markedaspatrollederrortext' );
1210                 }
1211         }
1212
1213
1214         /**
1215          * Add or remove this page to my watchlist based on value of $add
1216          */
1217         function watch( $add = true ) {
1218                 global $wgUser, $wgOut;
1219                 global $wgDeferredUpdateList;
1220
1221                 if ( 0 == $wgUser->getID() ) {
1222                         $wgOut->errorpage( 'watchnologin', 'watchnologintext' );
1223                         return;
1224                 }
1225                 if ( wfReadOnly() ) {
1226                         $wgOut->readOnlyPage();
1227                         return;
1228                 }
1229                 if( $add )
1230                         $wgUser->addWatch( $this->mTitle );
1231                 else
1232                         $wgUser->removeWatch( $this->mTitle );
1233
1234                 $wgOut->setPagetitle( wfMsg( $add ? 'addedwatch' : 'removedwatch' ) );
1235                 $wgOut->setRobotpolicy( 'noindex,follow' );
1236
1237                 $sk = $wgUser->getSkin() ;
1238                 $link = $this->mTitle->getPrefixedText();
1239
1240                 if($add)
1241                         $text = wfMsg( 'addedwatchtext', $link );
1242                 else
1243                         $text = wfMsg( 'removedwatchtext', $link );
1244                 $wgOut->addWikiText( $text );
1245
1246                 $up = new UserUpdate();
1247                 array_push( $wgDeferredUpdateList, $up );
1248
1249                 $wgOut->returnToMain( true, $this->mTitle->getPrefixedText() );
1250         }
1251
1252         /**
1253          * Stop watching a page, it act just like a call to watch(false)
1254          */
1255         function unwatch() {
1256                 $this->watch( false );
1257         }
1258
1259         /**
1260          * protect a page
1261          */
1262         function protect( $limit = 'sysop' ) {
1263                 global $wgUser, $wgOut, $wgRequest;
1264
1265                 if ( ! $wgUser->isAllowed('protect') ) {
1266                         $wgOut->sysopRequired();
1267                         return;
1268                 }
1269                 if ( wfReadOnly() ) {
1270                         $wgOut->readOnlyPage();
1271                         return;
1272                 }
1273                 $id = $this->mTitle->getArticleID();
1274                 if ( 0 == $id ) {
1275                         $wgOut->fatalError( wfMsg( 'badarticleerror' ) );
1276                         return;
1277                 }
1278
1279                 $confirm = $wgRequest->getBool( 'wpConfirmProtect' ) && $wgRequest->wasPosted();
1280                 $moveonly = $wgRequest->getBool( 'wpMoveOnly' );
1281                 $reason = $wgRequest->getText( 'wpReasonProtect' );
1282
1283                 if ( $confirm ) {
1284                         $restrictions = "move=" . $limit;
1285                         if( !$moveonly ) {
1286                                 $restrictions .= ":edit=" . $limit;
1287                         }
1288
1289                         $dbw =& wfGetDB( DB_MASTER );
1290                         $dbw->update( 'cur',
1291                                 array( /* SET */
1292                                         'cur_touched' => $dbw->timestamp(),
1293                                         'cur_restrictions' => $restrictions
1294                                 ), array( /* WHERE */
1295                                         'cur_id' => $id
1296                                 ), 'Article::protect'
1297                         );
1298
1299                         $log = new LogPage( 'protect' );
1300                         if ( $limit === '' ) {
1301                                         $log->addEntry( 'unprotect', $this->mTitle, $reason );
1302                         } else {
1303                                         $log->addEntry( 'protect', $this->mTitle, $reason );
1304                         }
1305                         $wgOut->redirect( $this->mTitle->getFullURL() );
1306                         return;
1307                 } else {
1308                         $reason = htmlspecialchars( wfMsg( 'protectreason' ) );
1309                         return $this->confirmProtect( '', $reason, $limit );
1310                 }
1311         }
1312
1313         /**
1314          * Output protection confirmation dialog
1315          */
1316         function confirmProtect( $par, $reason, $limit = 'sysop'  ) {
1317                 global $wgOut;
1318
1319                 wfDebug( "Article::confirmProtect\n" );
1320
1321                 $sub = htmlspecialchars( $this->mTitle->getPrefixedText() );
1322                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
1323
1324                 $check = '';
1325                 $protcom = '';
1326                 $moveonly = '';
1327
1328                 if ( $limit === '' ) {
1329                         $wgOut->setPageTitle( wfMsg( 'confirmunprotect' ) );
1330                         $wgOut->setSubtitle( wfMsg( 'unprotectsub', $sub ) );
1331                         $wgOut->addWikiText( wfMsg( 'confirmunprotecttext' ) );
1332                         $check = htmlspecialchars( wfMsg( 'confirmunprotect' ) );
1333                         $protcom = htmlspecialchars( wfMsg( 'unprotectcomment' ) );
1334                         $formaction = $this->mTitle->escapeLocalURL( 'action=unprotect' . $par );
1335                 } else {
1336                         $wgOut->setPageTitle( wfMsg( 'confirmprotect' ) );
1337                         $wgOut->setSubtitle( wfMsg( 'protectsub', $sub ) );
1338                         $wgOut->addWikiText( wfMsg( 'confirmprotecttext' ) );
1339                         $check = htmlspecialchars( wfMsg( 'confirmprotect' ) );
1340                         $moveonly = htmlspecialchars( wfMsg( 'protectmoveonly' ) );
1341                         $protcom = htmlspecialchars( wfMsg( 'protectcomment' ) );
1342                         $formaction = $this->mTitle->escapeLocalURL( 'action=protect' . $par );
1343                 }
1344
1345                 $confirm = htmlspecialchars( wfMsg( 'confirm' ) );
1346
1347                 $wgOut->addHTML( "
1348 <form id='protectconfirm' method='post' action=\"{$formaction}\">
1349         <table border='0'>
1350                 <tr>
1351                         <td align='right'>
1352                                 <label for='wpReasonProtect'>{$protcom}:</label>
1353                         </td>
1354                         <td align='left'>
1355                                 <input type='text' size='60' name='wpReasonProtect' id='wpReasonProtect' value=\"" . htmlspecialchars( $reason ) . "\" />
1356                         </td>
1357                 </tr>
1358                 <tr>
1359                         <td>&nbsp;</td>
1360                 </tr>
1361                 <tr>
1362                         <td align='right'>
1363                                 <input type='checkbox' name='wpConfirmProtect' value='1' id='wpConfirmProtect' />
1364                         </td>
1365                         <td>
1366                                 <label for='wpConfirmProtect'>{$check}</label>
1367                         </td>
1368                 </tr> " );
1369                 if($moveonly != '') {
1370                         $wgOut->AddHTML( "
1371                 <tr>
1372                         <td align='right'>
1373                                 <input type='checkbox' name='wpMoveOnly' value='1' id='wpMoveOnly' />
1374                         </td>
1375                         <td>
1376                                 <label for='wpMoveOnly'>{$moveonly}</label>
1377                         </td>
1378                 </tr> " );
1379                 }
1380                 $wgOut->addHTML( "
1381                 <tr>
1382                         <td>&nbsp;</td>
1383                         <td>
1384                                 <input type='submit' name='wpConfirmProtectB' value=\"{$confirm}\" />
1385                         </td>
1386                 </tr>
1387         </table>
1388 </form>\n" );
1389
1390                 $wgOut->returnToMain( false );
1391         }
1392
1393         /**
1394          * Unprotect the pages
1395          */
1396         function unprotect() {
1397                 return $this->protect( '' );
1398         }
1399
1400         /*
1401          * UI entry point for page deletion
1402          */
1403         function delete() {
1404                 global $wgUser, $wgOut, $wgMessageCache, $wgRequest;
1405                 $fname = 'Article::delete';
1406                 $confirm = $wgRequest->getBool( 'wpConfirm' ) && $wgRequest->wasPosted();
1407                 $reason = $wgRequest->getText( 'wpReason' );
1408
1409                 # This code desperately needs to be totally rewritten
1410
1411                 # Check permissions
1412                 if ( ( ! $wgUser->isAllowed('delete') ) ) {
1413                         $wgOut->sysopRequired();
1414                         return;
1415                 }
1416                 if ( wfReadOnly() ) {
1417                         $wgOut->readOnlyPage();
1418                         return;
1419                 }
1420
1421                 # Better double-check that it hasn't been deleted yet!
1422                 $wgOut->setPagetitle( wfMsg( 'confirmdelete' ) );
1423                 if ( ( '' == trim( $this->mTitle->getText() ) )
1424                   or ( $this->mTitle->getArticleId() == 0 ) ) {
1425                         $wgOut->fatalError( wfMsg( 'cannotdelete' ) );
1426                         return;
1427                 }
1428
1429                 if ( $confirm ) {
1430                         $this->doDelete( $reason );
1431                         return;
1432                 }
1433
1434                 # determine whether this page has earlier revisions
1435                 # and insert a warning if it does
1436                 # we select the text because it might be useful below
1437                 $dbr =& $this->getDB();
1438                 $ns = $this->mTitle->getNamespace();
1439                 $title = $this->mTitle->getDBkey();
1440                 $old = $dbr->selectRow( 'old',
1441                         array( 'old_text', 'old_flags' ),
1442                         array(
1443                                 'old_namespace' => $ns,
1444                                 'old_title' => $title,
1445                         ), $fname, $this->getSelectOptions( array( 'ORDER BY' => 'inverse_timestamp' ) )
1446                 );
1447
1448                 if( $old !== false && !$confirm ) {
1449                         $skin=$wgUser->getSkin();
1450                         $wgOut->addHTML('<b>'.wfMsg('historywarning'));
1451                         $wgOut->addHTML( $skin->historyLink() .'</b>');
1452                 }
1453
1454                 # Fetch cur_text
1455                 $s = $dbr->selectRow( 'cur',
1456                         array( 'cur_text' ),
1457                         array(
1458                                 'cur_namespace' => $ns,
1459                                 'cur_title' => $title,
1460                         ), $fname, $this->getSelectOptions()
1461                 );
1462
1463                 if( $s !== false ) {
1464                         # if this is a mini-text, we can paste part of it into the deletion reason
1465
1466                         #if this is empty, an earlier revision may contain "useful" text
1467                         $blanked = false;
1468                         if($s->cur_text != '') {
1469                                 $text=$s->cur_text;
1470                         } else {
1471                                 if($old) {
1472                                         $text = Article::getRevisionText( $old );
1473                                         $blanked = true;
1474                                 }
1475
1476                         }
1477
1478                         $length=strlen($text);
1479
1480                         # this should not happen, since it is not possible to store an empty, new
1481                         # page. Let's insert a standard text in case it does, though
1482                         if($length == 0 && $reason === '') {
1483                                 $reason = wfMsg('exblank');
1484                         }
1485
1486                         if($length < 500 && $reason === '') {
1487
1488                                 # comment field=255, let's grep the first 150 to have some user
1489                                 # space left
1490                                 $text=substr($text,0,150);
1491                                 # let's strip out newlines and HTML tags
1492                                 $text=preg_replace('/\"/',"'",$text);
1493                                 $text=preg_replace('/\</','&lt;',$text);
1494                                 $text=preg_replace('/\>/','&gt;',$text);
1495                                 $text=preg_replace("/[\n\r]/",'',$text);
1496                                 if(!$blanked) {
1497                                         $reason=wfMsg('excontent'). " '".$text;
1498                                 } else {
1499                                         $reason=wfMsg('exbeforeblank') . " '".$text;
1500                                 }
1501                                 if($length>150) { $reason .= '...'; } # we've only pasted part of the text
1502                                 $reason.="'";
1503                         }
1504                 }
1505
1506                 return $this->confirmDelete( '', $reason );
1507         }
1508
1509         /**
1510          * Output deletion confirmation dialog
1511          */
1512         function confirmDelete( $par, $reason ) {
1513                 global $wgOut;
1514
1515                 wfDebug( "Article::confirmDelete\n" );
1516
1517                 $sub = htmlspecialchars( $this->mTitle->getPrefixedText() );
1518                 $wgOut->setSubtitle( wfMsg( 'deletesub', $sub ) );
1519                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
1520                 $wgOut->addWikiText( wfMsg( 'confirmdeletetext' ) );
1521
1522                 $formaction = $this->mTitle->escapeLocalURL( 'action=delete' . $par );
1523
1524                 $confirm = htmlspecialchars( wfMsg( 'confirm' ) );
1525                 $check = htmlspecialchars( wfMsg( 'confirmcheck' ) );
1526                 $delcom = htmlspecialchars( wfMsg( 'deletecomment' ) );
1527
1528                 $wgOut->addHTML( "
1529 <form id='deleteconfirm' method='post' action=\"{$formaction}\">
1530         <table border='0'>
1531                 <tr>
1532                         <td align='right'>
1533                                 <label for='wpReason'>{$delcom}:</label>
1534                         </td>
1535                         <td align='left'>
1536                                 <input type='text' size='60' name='wpReason' id='wpReason' value=\"" . htmlspecialchars( $reason ) . "\" />
1537                         </td>
1538                 </tr>
1539                 <tr>
1540                         <td>&nbsp;</td>
1541                 </tr>
1542                 <tr>
1543                         <td align='right'>
1544                                 <input type='checkbox' name='wpConfirm' value='1' id='wpConfirm' />
1545                         </td>
1546                         <td>
1547                                 <label for='wpConfirm'>{$check}</label>
1548                         </td>
1549                 </tr>
1550                 <tr>
1551                         <td>&nbsp;</td>
1552                         <td>
1553                                 <input type='submit' name='wpConfirmB' value=\"{$confirm}\" />
1554                         </td>
1555                 </tr>
1556         </table>
1557 </form>\n" );
1558
1559                 $wgOut->returnToMain( false );
1560         }
1561
1562
1563         /**
1564          * Perform a deletion and output success or failure messages
1565          */
1566         function doDelete( $reason ) {
1567                 global $wgOut, $wgUser, $wgContLang;
1568                 $fname = 'Article::doDelete';
1569                 wfDebug( $fname."\n" );
1570
1571                 if ( $this->doDeleteArticle( $reason ) ) {
1572                         $deleted = $this->mTitle->getPrefixedText();
1573
1574                         $wgOut->setPagetitle( wfMsg( 'actioncomplete' ) );
1575                         $wgOut->setRobotpolicy( 'noindex,nofollow' );
1576
1577                         $sk = $wgUser->getSkin();
1578                         $loglink = $sk->makeKnownLink( $wgContLang->getNsText( NS_PROJECT ) .
1579                           ':' . wfMsgForContent( 'dellogpage' ), wfMsg( 'deletionlog' ) );
1580
1581                         $text = wfMsg( 'deletedtext', $deleted, $loglink );
1582
1583                         $wgOut->addHTML( '<p>' . $text . "</p>\n" );
1584                         $wgOut->returnToMain( false );
1585                 } else {
1586                         $wgOut->fatalError( wfMsg( 'cannotdelete' ) );
1587                 }
1588         }
1589
1590         /**
1591          * Back-end article deletion
1592          * Deletes the article with database consistency, writes logs, purges caches
1593          * Returns success
1594          */
1595         function doDeleteArticle( $reason ) {
1596                 global $wgUser;
1597                 global  $wgUseSquid, $wgDeferredUpdateList, $wgInternalServer;
1598
1599                 $fname = 'Article::doDeleteArticle';
1600                 wfDebug( $fname."\n" );
1601
1602                 $dbw =& wfGetDB( DB_MASTER );
1603                 $ns = $this->mTitle->getNamespace();
1604                 $t = $this->mTitle->getDBkey();
1605                 $id = $this->mTitle->getArticleID();
1606
1607                 if ( $t == '' || $id == 0 ) {
1608                         return false;
1609                 }
1610
1611                 $u = new SiteStatsUpdate( 0, 1, -$this->isCountable( $this->getContent( true ) ) );
1612                 array_push( $wgDeferredUpdateList, $u );
1613
1614                 $linksTo = $this->mTitle->getLinksTo();
1615
1616                 # Squid purging
1617                 if ( $wgUseSquid ) {
1618                         $urls = array(
1619                                 $this->mTitle->getInternalURL(),
1620                                 $this->mTitle->getInternalURL( 'history' )
1621                         );
1622                         foreach ( $linksTo as $linkTo ) {
1623                                 $urls[] = $linkTo->getInternalURL();
1624                         }
1625
1626                         $u = new SquidUpdate( $urls );
1627                         array_push( $wgDeferredUpdateList, $u );
1628
1629                 }
1630
1631                 # Client and file cache invalidation
1632                 Title::touchArray( $linksTo );
1633
1634                 # Move article and history to the "archive" table
1635                 $archiveTable = $dbw->tableName( 'archive' );
1636                 $oldTable = $dbw->tableName( 'old' );
1637                 $curTable = $dbw->tableName( 'cur' );
1638                 $recentchangesTable = $dbw->tableName( 'recentchanges' );
1639                 $linksTable = $dbw->tableName( 'links' );
1640                 $brokenlinksTable = $dbw->tableName( 'brokenlinks' );
1641
1642                 $dbw->insertSelect( 'archive', 'cur',
1643                         array(
1644                                 'ar_namespace' => 'cur_namespace',
1645                                 'ar_title' => 'cur_title',
1646                                 'ar_text' => 'cur_text',
1647                                 'ar_comment' => 'cur_comment',
1648                                 'ar_user' => 'cur_user',
1649                                 'ar_user_text' => 'cur_user_text',
1650                                 'ar_timestamp' => 'cur_timestamp',
1651                                 'ar_minor_edit' => 'cur_minor_edit',
1652                                 'ar_flags' => 0,
1653                         ), array(
1654                                 'cur_namespace' => $ns,
1655                                 'cur_title' => $t,
1656                         ), $fname
1657                 );
1658
1659                 $dbw->insertSelect( 'archive', 'old',
1660                         array(
1661                                 'ar_namespace' => 'old_namespace',
1662                                 'ar_title' => 'old_title',
1663                                 'ar_text' => 'old_text',
1664                                 'ar_comment' => 'old_comment',
1665                                 'ar_user' => 'old_user',
1666                                 'ar_user_text' => 'old_user_text',
1667                                 'ar_timestamp' => 'old_timestamp',
1668                                 'ar_minor_edit' => 'old_minor_edit',
1669                                 'ar_flags' => 'old_flags'
1670                         ), array(
1671                                 'old_namespace' => $ns,
1672                                 'old_title' => $t,
1673                         ), $fname
1674                 );
1675
1676                 # Now that it's safely backed up, delete it
1677
1678                 $dbw->delete( 'cur', array( 'cur_namespace' => $ns, 'cur_title' => $t ), $fname );
1679                 $dbw->delete( 'old', array( 'old_namespace' => $ns, 'old_title' => $t ), $fname );
1680                 $dbw->delete( 'recentchanges', array( 'rc_namespace' => $ns, 'rc_title' => $t ), $fname );
1681
1682                 # Finally, clean up the link tables
1683                 $t = $this->mTitle->getPrefixedDBkey();
1684
1685                 Article::onArticleDelete( $this->mTitle );
1686
1687                 # Insert broken links
1688                 $brokenLinks = array();
1689                 foreach ( $linksTo as $titleObj ) {
1690                         # Get article ID. Efficient because it was loaded into the cache by getLinksTo().
1691                         $linkID = $titleObj->getArticleID();
1692                         $brokenLinks[] = array( 'bl_from' => $linkID, 'bl_to' => $t );
1693                 }
1694                 $dbw->insert( 'brokenlinks', $brokenLinks, $fname, 'IGNORE' );
1695
1696                 # Delete live links
1697                 $dbw->delete( 'links', array( 'l_to' => $id ) );
1698                 $dbw->delete( 'links', array( 'l_from' => $id ) );
1699                 $dbw->delete( 'imagelinks', array( 'il_from' => $id ) );
1700                 $dbw->delete( 'brokenlinks', array( 'bl_from' => $id ) );
1701                 $dbw->delete( 'categorylinks', array( 'cl_from' => $id ) );
1702
1703                 # Log the deletion
1704                 $log = new LogPage( 'delete' );
1705                 $log->addEntry( 'delete', $this->mTitle, $reason );
1706
1707                 # Clear the cached article id so the interface doesn't act like we exist
1708                 $this->mTitle->resetArticleID( 0 );
1709                 $this->mTitle->mArticleID = 0;
1710                 return true;
1711         }
1712
1713         /**
1714          * Revert a modification
1715          */
1716         function rollback() {
1717                 global $wgUser, $wgOut, $wgRequest;
1718                 $fname = 'Article::rollback';
1719
1720                 if ( ! $wgUser->isAllowed('rollback') ) {
1721                         $wgOut->sysopRequired();
1722                         return;
1723                 }
1724                 if ( wfReadOnly() ) {
1725                         $wgOut->readOnlyPage( $this->getContent( true ) );
1726                         return;
1727                 }
1728                 $dbw =& wfGetDB( DB_MASTER );
1729
1730                 # Enhanced rollback, marks edits rc_bot=1
1731                 $bot = $wgRequest->getBool( 'bot' );
1732
1733                 # Replace all this user's current edits with the next one down
1734                 $tt = $this->mTitle->getDBKey();
1735                 $n = $this->mTitle->getNamespace();
1736
1737                 # Get the last editor, lock table exclusively
1738                 $s = $dbw->selectRow( 'cur',
1739                         array( 'cur_id','cur_user','cur_user_text','cur_comment' ),
1740                         array( 'cur_title' => $tt, 'cur_namespace' => $n ),
1741                         $fname, 'FOR UPDATE'
1742                 );
1743                 if( $s === false ) {
1744                         # Something wrong
1745                         $wgOut->addHTML( wfMsg( 'notanarticle' ) );
1746                         return;
1747                 }
1748                 $ut = $dbw->strencode( $s->cur_user_text );
1749                 $uid = $s->cur_user;
1750                 $pid = $s->cur_id;
1751
1752                 $from = str_replace( '_', ' ', $wgRequest->getVal( 'from' ) );
1753                 if( $from != $s->cur_user_text ) {
1754                         $wgOut->setPageTitle(wfmsg('rollbackfailed'));
1755                         $wgOut->addWikiText( wfMsg( 'alreadyrolled',
1756                                 htmlspecialchars( $this->mTitle->getPrefixedText()),
1757                                 htmlspecialchars( $from ),
1758                                 htmlspecialchars( $s->cur_user_text ) ) );
1759                         if($s->cur_comment != '') {
1760                                 $wgOut->addHTML(
1761                                         wfMsg('editcomment',
1762                                         htmlspecialchars( $s->cur_comment ) ) );
1763                         }
1764                         return;
1765                 }
1766
1767                 # Get the last edit not by this guy
1768                 $s = $dbw->selectRow( 'old',
1769                         array( 'old_text','old_user','old_user_text','old_timestamp','old_flags' ),
1770                         array(
1771                                 'old_namespace' => $n,
1772                                 'old_title' => $tt,
1773                                 "old_user <> {$uid} OR old_user_text <> '{$ut}'"
1774                         ), $fname, array( 'FOR UPDATE', 'USE INDEX' => 'name_title_timestamp' )
1775                 );
1776                 if( $s === false ) {
1777                         # Something wrong
1778                         $wgOut->setPageTitle(wfMsg('rollbackfailed'));
1779                         $wgOut->addHTML( wfMsg( 'cantrollback' ) );
1780                         return;
1781                 }
1782
1783                 if ( $bot ) {
1784                         # Mark all reverted edits as bot
1785                         $dbw->update( 'recentchanges',
1786                                 array( /* SET */
1787                                         'rc_bot' => 1
1788                                 ), array( /* WHERE */
1789                                         'rc_user' => $uid,
1790                                         "rc_timestamp > '{$s->old_timestamp}'",
1791                                 ), $fname
1792                         );
1793                 }
1794
1795                 # Save it!
1796                 $newcomment = wfMsg( 'revertpage', $s->old_user_text, $from );
1797                 $wgOut->setPagetitle( wfMsg( 'actioncomplete' ) );
1798                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
1799                 $wgOut->addHTML( '<h2>' . htmlspecialchars( $newcomment ) . "</h2>\n<hr />\n" );
1800                 $this->updateArticle( Article::getRevisionText( $s ), $newcomment, 1, $this->mTitle->userIsWatching(), $bot );
1801                 Article::onArticleEdit( $this->mTitle );
1802                 $wgOut->returnToMain( false );
1803         }
1804
1805
1806         /**
1807          * Do standard deferred updates after page view
1808          * @private
1809          */
1810         function viewUpdates() {
1811                 global $wgDeferredUpdateList;
1812                 if ( 0 != $this->getID() ) {
1813                         global $wgDisableCounters;
1814                         if( !$wgDisableCounters ) {
1815                                 Article::incViewCount( $this->getID() );
1816                                 $u = new SiteStatsUpdate( 1, 0, 0 );
1817                                 array_push( $wgDeferredUpdateList, $u );
1818                         }
1819                 }
1820                 $u = new UserTalkUpdate( 0, $this->mTitle->getNamespace(),
1821                   $this->mTitle->getDBkey() );
1822                 array_push( $wgDeferredUpdateList, $u );
1823         }
1824
1825         /**
1826          * Do standard deferred updates after page edit.
1827          * Every 1000th edit, prune the recent changes table.
1828          * @private
1829          * @param string $text
1830          */
1831         function editUpdates( $text ) {
1832                 global $wgDeferredUpdateList, $wgDBname, $wgMemc;
1833                 global $wgMessageCache;
1834
1835                 wfSeedRandom();
1836                 if ( 0 == mt_rand( 0, 999 ) ) {
1837                         $dbw =& wfGetDB( DB_MASTER );
1838                         $cutoff = $dbw->timestamp( time() - ( 7 * 86400 ) );
1839                         $sql = "DELETE FROM recentchanges WHERE rc_timestamp < '{$cutoff}'";
1840                         $dbw->query( $sql );
1841                 }
1842                 $id = $this->getID();
1843                 $title = $this->mTitle->getPrefixedDBkey();
1844                 $shortTitle = $this->mTitle->getDBkey();
1845
1846                 $adj = $this->mCountAdjustment;
1847
1848                 if ( 0 != $id ) {
1849                         $u = new LinksUpdate( $id, $title );
1850                         array_push( $wgDeferredUpdateList, $u );
1851                         $u = new SiteStatsUpdate( 0, 1, $adj );
1852                         array_push( $wgDeferredUpdateList, $u );
1853                         $u = new SearchUpdate( $id, $title, $text );
1854                         array_push( $wgDeferredUpdateList, $u );
1855
1856                         $u = new UserTalkUpdate( 1, $this->mTitle->getNamespace(), $shortTitle );
1857                         array_push( $wgDeferredUpdateList, $u );
1858
1859                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
1860                                 $wgMessageCache->replace( $shortTitle, $text );
1861                         }
1862                 }
1863         }
1864
1865         /**
1866          * @todo document this function
1867          * @private
1868          * @param string $oldid         Revision ID of this article revision
1869          */
1870         function setOldSubtitle( $oldid=0 ) {
1871                 global $wgLang, $wgOut, $wgUser;
1872
1873                 $td = $wgLang->timeanddate( $this->mTimestamp, true );
1874                 $sk = $wgUser->getSkin();
1875                 $lnk = $sk->makeKnownLinkObj ( $this->mTitle, wfMsg( 'currentrevisionlink' ) );
1876                 $prevlink = $sk->makeKnownLinkObj( $this->mTitle, wfMsg( 'previousrevision' ), 'direction=prev&oldid='.$oldid );
1877                 $nextlink = $sk->makeKnownLinkObj( $this->mTitle, wfMsg( 'nextrevision' ), 'direction=next&oldid='.$oldid );
1878                 $r = wfMsg( 'revisionasofwithlink', $td, $lnk, $prevlink, $nextlink );
1879                 $wgOut->setSubtitle( $r );
1880         }
1881
1882         /**
1883          * This function is called right before saving the wikitext,
1884          * so we can do things like signatures and links-in-context.
1885          *
1886          * @param string $text
1887          */
1888         function preSaveTransform( $text ) {
1889                 global $wgParser, $wgUser;
1890                 return $wgParser->preSaveTransform( $text, $this->mTitle, $wgUser, ParserOptions::newFromUser( $wgUser ) );
1891         }
1892
1893         /* Caching functions */
1894
1895         /**
1896          * checkLastModified returns true if it has taken care of all
1897          * output to the client that is necessary for this request.
1898          * (that is, it has sent a cached version of the page)
1899          */
1900         function tryFileCache() {
1901                 static $called = false;
1902                 if( $called ) {
1903                         wfDebug( " tryFileCache() -- called twice!?\n" );
1904                         return;
1905                 }
1906                 $called = true;
1907                 if($this->isFileCacheable()) {
1908                         $touched = $this->mTouched;
1909                         if( $this->mTitle->getPrefixedDBkey() == wfMsg( 'mainpage' ) ) {
1910                                 # Expire the main page quicker
1911                                 $expire = wfUnix2Timestamp( time() - 3600 );
1912                                 $touched = max( $expire, $touched );
1913                         }
1914                         $cache = new CacheManager( $this->mTitle );
1915                         if($cache->isFileCacheGood( $touched )) {
1916                                 global $wgOut;
1917                                 wfDebug( " tryFileCache() - about to load\n" );
1918                                 $cache->loadFromFileCache();
1919                                 return true;
1920                         } else {
1921                                 wfDebug( " tryFileCache() - starting buffer\n" );
1922                                 ob_start( array(&$cache, 'saveToFileCache' ) );
1923                         }
1924                 } else {
1925                         wfDebug( " tryFileCache() - not cacheable\n" );
1926                 }
1927         }
1928
1929         /**
1930          * Check if the page can be cached
1931          * @return bool
1932          */
1933         function isFileCacheable() {
1934                 global $wgUser, $wgUseFileCache, $wgShowIPinHeader, $wgRequest;
1935                 extract( $wgRequest->getValues( 'action', 'oldid', 'diff', 'redirect', 'printable' ) );
1936
1937                 return $wgUseFileCache
1938                         and (!$wgShowIPinHeader)
1939                         and ($this->getID() != 0)
1940                         and ($wgUser->getId() == 0)
1941                         and (!$wgUser->getNewtalk())
1942                         and ($this->mTitle->getNamespace() != NS_SPECIAL )
1943                         and (empty( $action ) || $action == 'view')
1944                         and (!isset($oldid))
1945                         and (!isset($diff))
1946                         and (!isset($redirect))
1947                         and (!isset($printable))
1948                         and (!$this->mRedirectedFrom);
1949         }
1950
1951         /**
1952          * Loads cur_touched and returns a value indicating if it should be used
1953          *
1954          */
1955         function checkTouched() {
1956                 $fname = 'Article::checkTouched';
1957                 $id = $this->getID();
1958                 $dbr =& $this->getDB();
1959                 $s = $dbr->selectRow( 'cur', array( 'cur_touched', 'cur_is_redirect' ),
1960                         array( 'cur_id' => $id ), $fname, $this->getSelectOptions() );
1961                 if( $s !== false ) {
1962                         $this->mTouched = wfTimestamp(TS_MW,$s->cur_touched);
1963                         return !$s->cur_is_redirect;
1964                 } else {
1965                         return false;
1966                 }
1967         }
1968
1969         /**
1970          * Edit an article without doing all that other stuff
1971          *
1972          * @param string $text text submitted
1973          * @param string $comment comment submitted
1974          * @param integer $minor whereas it's a minor modification
1975          */
1976         function quickEdit( $text, $comment = '', $minor = 0 ) {
1977                 global $wgUser;
1978                 $fname = 'Article::quickEdit';
1979                 wfProfileIn( $fname );
1980
1981                 $dbw =& wfGetDB( DB_MASTER );
1982                 $ns = $this->mTitle->getNamespace();
1983                 $dbkey = $this->mTitle->getDBkey();
1984                 $encDbKey = $dbw->strencode( $dbkey );
1985                 $timestamp = wfTimestampNow();
1986
1987                 # Save to history
1988                 $dbw->insertSelect( 'old', 'cur',
1989                         array(
1990                                 'old_namespace' => 'cur_namespace',
1991                                 'old_title' => 'cur_title',
1992                                 'old_text' => 'cur_text',
1993                                 'old_comment' => 'cur_comment',
1994                                 'old_user' => 'cur_user',
1995                                 'old_user_text' => 'cur_user_text',
1996                                 'old_timestamp' => 'cur_timestamp',
1997                                 'inverse_timestamp' => '99999999999999-cur_timestamp',
1998                         ), array(
1999                                 'cur_namespace' => $ns,
2000                                 'cur_title' => $dbkey,
2001                         ), $fname
2002                 );
2003
2004                 # Use the affected row count to determine if the article is new
2005                 $numRows = $dbw->affectedRows();
2006
2007                 # Make an array of fields to be inserted
2008                 $fields = array(
2009                         'cur_text' => $text,
2010                         'cur_timestamp' => $timestamp,
2011                         'cur_user' => $wgUser->getID(),
2012                         'cur_user_text' => $wgUser->getName(),
2013                         'inverse_timestamp' => wfInvertTimestamp( $timestamp ),
2014                         'cur_comment' => $comment,
2015                         'cur_is_redirect' => $this->isRedirect( $text ) ? 1 : 0,
2016                         'cur_minor_edit' => intval($minor),
2017                         'cur_touched' => $dbw->timestamp($timestamp),
2018                 );
2019
2020                 if ( $numRows ) {
2021                         # Update article
2022                         $fields['cur_is_new'] = 0;
2023                         $dbw->update( 'cur', $fields, array( 'cur_namespace' => $ns, 'cur_title' => $dbkey ), $fname );
2024                 } else {
2025                         # Insert new article
2026                         $fields['cur_is_new'] = 1;
2027                         $fields['cur_namespace'] = $ns;
2028                         $fields['cur_title'] = $dbkey;
2029                         $fields['cur_random'] = $rand = wfRandom();
2030                         $dbw->insert( 'cur', $fields, $fname );
2031                 }
2032                 wfProfileOut( $fname );
2033         }
2034
2035         /**
2036          * Used to increment the view counter
2037          *
2038          * @static
2039          * @param integer $id article id
2040          */
2041         function incViewCount( $id ) {
2042                 $id = intval( $id );
2043                 global $wgHitcounterUpdateFreq;
2044
2045                 $dbw =& wfGetDB( DB_MASTER );
2046                 $curTable = $dbw->tableName( 'cur' );
2047                 $hitcounterTable = $dbw->tableName( 'hitcounter' );
2048                 $acchitsTable = $dbw->tableName( 'acchits' );
2049
2050                 if( $wgHitcounterUpdateFreq <= 1 ){ //
2051                         $dbw->query( "UPDATE $curTable SET cur_counter = cur_counter + 1 WHERE cur_id = $id" );
2052                         return;
2053                 }
2054
2055                 # Not important enough to warrant an error page in case of failure
2056                 $oldignore = $dbw->ignoreErrors( true );
2057
2058                 $dbw->query( "INSERT INTO $hitcounterTable (hc_id) VALUES ({$id})" );
2059
2060                 $checkfreq = intval( $wgHitcounterUpdateFreq/25 + 1 );
2061                 if( (rand() % $checkfreq != 0) or ($dbw->lastErrno() != 0) ){
2062                         # Most of the time (or on SQL errors), skip row count check
2063                         $dbw->ignoreErrors( $oldignore );
2064                         return;
2065                 }
2066
2067                 $res = $dbw->query("SELECT COUNT(*) as n FROM $hitcounterTable");
2068                 $row = $dbw->fetchObject( $res );
2069                 $rown = intval( $row->n );
2070                 if( $rown >= $wgHitcounterUpdateFreq ){
2071                         wfProfileIn( 'Article::incViewCount-collect' );
2072                         $old_user_abort = ignore_user_abort( true );
2073
2074                         $dbw->query("LOCK TABLES $hitcounterTable WRITE");
2075                         $dbw->query("CREATE TEMPORARY TABLE $acchitsTable TYPE=HEAP ".
2076                                 "SELECT hc_id,COUNT(*) AS hc_n FROM $hitcounterTable ".
2077                                 'GROUP BY hc_id');
2078                         $dbw->query("DELETE FROM $hitcounterTable");
2079                         $dbw->query('UNLOCK TABLES');
2080                         $dbw->query("UPDATE $curTable,$acchitsTable SET cur_counter=cur_counter + hc_n ".
2081                                 'WHERE cur_id = hc_id');
2082                         $dbw->query("DROP TABLE $acchitsTable");
2083
2084                         ignore_user_abort( $old_user_abort );
2085                         wfProfileOut( 'Article::incViewCount-collect' );
2086                 }
2087                 $dbw->ignoreErrors( $oldignore );
2088         }
2089
2090         /**#@+
2091          * The onArticle*() functions are supposed to be a kind of hooks
2092          * which should be called whenever any of the specified actions
2093          * are done.
2094          *
2095          * This is a good place to put code to clear caches, for instance.
2096          *
2097          * This is called on page move and undelete, as well as edit
2098          * @static
2099          * @param $title_obj a title object
2100          */
2101
2102         function onArticleCreate($title_obj) {
2103                 global $wgUseSquid, $wgDeferredUpdateList;
2104
2105                 $titles = $title_obj->getBrokenLinksTo();
2106
2107                 # Purge squid
2108                 if ( $wgUseSquid ) {
2109                         $urls = $title_obj->getSquidURLs();
2110                         foreach ( $titles as $linkTitle ) {
2111                                 $urls[] = $linkTitle->getInternalURL();
2112                         }
2113                         $u = new SquidUpdate( $urls );
2114                         array_push( $wgDeferredUpdateList, $u );
2115                 }
2116
2117                 # Clear persistent link cache
2118                 LinkCache::linksccClearBrokenLinksTo( $title_obj->getPrefixedDBkey() );
2119         }
2120
2121         function onArticleDelete($title_obj) {
2122                 LinkCache::linksccClearLinksTo( $title_obj->getArticleID() );
2123         }
2124         function onArticleEdit($title_obj) {
2125                 LinkCache::linksccClearPage( $title_obj->getArticleID() );
2126         }
2127         /**#@-*/
2128
2129         /**
2130          * Info about this page
2131          */
2132         function info() {
2133                 global $wgUser, $wgTitle, $wgOut, $wgAllowPageInfo;
2134                 $fname = 'Article::info';
2135
2136                 if ( !$wgAllowPageInfo ) {
2137                         $wgOut->errorpage( 'nosuchaction', 'nosuchactiontext' );
2138                         return;
2139                 }
2140
2141                 $dbr =& $this->getDB();
2142
2143                 $basenamespace = $wgTitle->getNamespace() & (~1);
2144                 $cur_clause = array( 'cur_title' => $wgTitle->getDBkey(), 'cur_namespace' => $basenamespace );
2145                 $old_clause = array( 'old_title' => $wgTitle->getDBkey(), 'old_namespace' => $basenamespace );
2146                 $wl_clause  = array( 'wl_title' => $wgTitle->getDBkey(), 'wl_namespace' => $basenamespace );
2147                 $fullTitle = $wgTitle->makeName($basenamespace, $wgTitle->getDBKey());
2148                 $wgOut->setPagetitle(  $fullTitle );
2149                 $wgOut->setSubtitle( wfMsg( 'infosubtitle' ));
2150
2151                 # first, see if the page exists at all.
2152                 $exists = $dbr->selectField( 'cur', 'COUNT(*)', $cur_clause, $fname, $this->getSelectOptions() );
2153                 if ($exists < 1) {
2154                         $wgOut->addHTML( wfMsg('noarticletext') );
2155                 } else {
2156                         $numwatchers = $dbr->selectField( 'watchlist', 'COUNT(*)', $wl_clause, $fname,
2157                                 $this->getSelectOptions() );
2158                         $wgOut->addHTML( "<ul><li>" . wfMsg("numwatchers", $numwatchers) . '</li>' );
2159                         $old = $dbr->selectField( 'old', 'COUNT(*)', $old_clause, $fname, $this->getSelectOptions() );
2160                         $wgOut->addHTML( "<li>" . wfMsg('numedits', $old + 1) . '</li>');
2161
2162                         # to find number of distinct authors, we need to do some
2163                         # funny stuff because of the cur/old table split:
2164                         # - first, find the name of the 'cur' author
2165                         # - then, find the number of *other* authors in 'old'
2166
2167                         # find 'cur' author
2168                         $cur_author = $dbr->selectField( 'cur', 'cur_user_text', $cur_clause, $fname,
2169                                 $this->getSelectOptions() );
2170
2171                         # find number of 'old' authors excluding 'cur' author
2172                         $authors = $dbr->selectField( 'old', 'COUNT(DISTINCT old_user_text)',
2173                                 $old_clause + array( 'old_user_text<>' . $dbr->addQuotes( $cur_author ) ), $fname,
2174                                 $this->getSelectOptions() ) + 1;
2175
2176                         # now for the Talk page ...
2177                         $cur_clause = array( 'cur_title' => $wgTitle->getDBkey(), 'cur_namespace' => $basenamespace+1 );
2178                         $old_clause = array( 'old_title' => $wgTitle->getDBkey(), 'old_namespace' => $basenamespace+1 );
2179
2180                         # does it exist?
2181                         $exists = $dbr->selectField( 'cur', 'COUNT(*)', $cur_clause, $fname, $this->getSelectOptions() );
2182
2183                         # number of edits
2184                         if ($exists > 0) {
2185                                 $old = $dbr->selectField( 'old', 'COUNT(*)', $old_clause, $fname, $this->getSelectOptions() );
2186                                 $wgOut->addHTML( '<li>' . wfMsg("numtalkedits", $old + 1) . '</li>');
2187                         }
2188                         $wgOut->addHTML( '<li>' . wfMsg("numauthors", $authors) . '</li>' );
2189
2190                         # number of authors
2191                         if ($exists > 0) {
2192                                 $cur_author = $dbr->selectField( 'cur', 'cur_user_text', $cur_clause, $fname,
2193                                         $this->getSelectOptions() );
2194                                 $authors = $dbr->selectField( 'cur', 'COUNT(DISTINCT old_user_text)',
2195                                         $old_clause + array( 'old_user_text<>' . $dbr->addQuotes( $cur_author ) ),
2196                                         $fname, $this->getSelectOptions() );
2197
2198                                 $wgOut->addHTML( '<li>' . wfMsg('numtalkauthors', $authors) . '</li></ul>' );
2199                         }
2200                 }
2201         }
2202 }
2203
2204 ?>