includes/Article.php

   1 <?php
   2 /**
   3  * File for articles
   4  * @version $Id$
   5  * @package MediaWiki
   6  */
   7
   8 /**
   9  * Need the CacheManager to be loaded
  10  */
  11 require_once ( 'CacheManager.php' );
  12
  13 $wgArticleCurContentFields = false;
  14 $wgArticleOldContentFields = false;
  15
  16 /**
  17  * Class representing a Wikipedia article and history.
  18  *
  19  * See design.doc for an overview.
  20  * Note: edit user interface and cache support functions have been
  21  * moved to separate EditPage and CacheManager classes.
  22  *
  23  * @version $Id$
  24  * @package MediaWiki
  25  */
  26 class Article {
  27         /**#@+
  28          * @access private
  29          */
  30         var $mContent, $mContentLoaded;
  31         var $mUser, $mTimestamp, $mUserText;
  32         var $mCounter, $mComment, $mCountAdjustment;
  33         var $mMinorEdit, $mRedirectedFrom;
  34         var $mTouched, $mFileCache, $mTitle;
  35         var $mId, $mTable;
  36         var $mForUpdate;
  37         /**#@-*/
  38
  39         /**
  40          * Constructor and clear the article
  41          * @param mixed &$title
  42          */
  43         function Article( &$title ) {
  44                 $this->mTitle =& $title;
  45                 $this->clear();
  46         }
  47
  48         /**
  49           * Clear the object
  50           * @private
  51           */
  52         function clear() {
  53                 $this->mContentLoaded = false;
  54                 $this->mCurID = $this->mUser = $this->mCounter = -1; # Not loaded
  55                 $this->mRedirectedFrom = $this->mUserText =
  56                 $this->mTimestamp = $this->mComment = $this->mFileCache = '';
  57                 $this->mCountAdjustment = 0;
  58                 $this->mTouched = '19700101000000';
  59                 $this->mForUpdate = false;
  60         }
  61
  62         /**
  63           * Get revision text associated with an old or archive row
  64           * $row is usually an object from wfFetchRow(), both the flags and the text
  65           * field must be included
  66           * @static
  67           * @param integer $row Id of a row
  68           * @param string $prefix table prefix (default 'old_')
  69           * @return string $text|false the text requested
  70         */
  71         function getRevisionText( $row, $prefix = 'old_' ) {
  72                 # Get data
  73                 $textField = $prefix . 'text';
  74                 $flagsField = $prefix . 'flags';
  75
  76                 if ( isset( $row->$flagsField ) ) {
  77                         $flags = explode( ',', $row->$flagsField );
  78                 } else {
  79                         $flags = array();
  80                 }
  81
  82                 if ( isset( $row->$textField ) ) {
  83                         $text = $row->$textField;
  84                 } else {
  85                         return false;
  86                 }
  87
  88                 if ( in_array( 'link', $flags ) ) {
  89                         # Handle link type
  90                         $text = Article::followLink( $text );
  91                 } elseif ( 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                         return gzinflate( $text );
  96                 }
  97                 return $text;
  98         }
  99
 100         /**
 101          * If $wgCompressRevisions is enabled, we will compress datas
 102          * @static
 103          * @param mixed $text reference to a text
 104          * @return string 'gzip' if it get compressed, '' overwise
 105          */
 106         function compressRevisionText( &$text ) {
 107                 global $wgCompressRevisions;
 108                 if( !$wgCompressRevisions ) {
 109                         return '';
 110                 }
 111                 if( !function_exists( 'gzdeflate' ) ) {
 112                         wfDebug( "Article::compressRevisionText() -- no zlib support, not compressing\n" );
 113                         return '';
 114                 }
 115                 $text = gzdeflate( $text );
 116                 return 'gzip';
 117         }
 118
 119         /**
 120          * Returns the text associated with a "link" type old table row
 121          * @static
 122          * @param mixed $link
 123          * @return string $text|false
 124          */
 125         function followLink( $link ) {
 126                 # Split the link into fields and values
 127                 $lines = explode( '\n', $link );
 128                 $hash = '';
 129                 $locations = array();
 130                 foreach ( $lines as $line ) {
 131                         # Comments
 132                         if ( $line{0} == '#' ) {
 133                                 continue;
 134                         }
 135                         # Field/value pairs
 136                         if ( preg_match( '/^(.*?)\s*:\s*(.*)$/', $line, $matches ) ) {
 137                                 $field = strtolower($matches[1]);
 138                                 $value = $matches[2];
 139                                 if ( $field == 'hash' ) {
 140                                         $hash = $value;
 141                                 } elseif ( $field == 'location' ) {
 142                                         $locations[] = $value;
 143                                 }
 144                         }
 145                 }
 146
 147                 if ( $hash === '' ) {
 148                         return false;
 149                 }
 150
 151                 # Look in each specified location for the text
 152                 $text = false;
 153                 foreach ( $locations as $location ) {
 154                         $text = Article::fetchFromLocation( $location, $hash );
 155                         if ( $text !== false ) {
 156                                 break;
 157                         }
 158                 }
 159
 160                 return $text;
 161         }
 162
 163         /**
 164          * @static
 165          * @param $location
 166          * @param $hash
 167          */
 168         function fetchFromLocation( $location, $hash ) {
 169                 global $wgLoadBalancer;
 170                 $fname = 'fetchFromLocation';
 171                 wfProfileIn( $fname );
 172
 173                 $p = strpos( $location, ':' );
 174                 if ( $p === false ) {
 175                         wfProfileOut( $fname );
 176                         return false;
 177                 }
 178
 179                 $type = substr( $location, 0, $p );
 180                 $text = false;
 181                 switch ( $type ) {
 182                         case 'mysql':
 183                                 # MySQL locations are specified by mysql://<machineID>/<dbname>/<tblname>/<index>
 184                                 # Machine ID 0 is the current connection
 185                                 if ( preg_match( '/^mysql:\/\/(\d+)\/([A-Za-z_]+)\/([A-Za-z_]+)\/([A-Za-z_]+)$/',
 186                                   $location, $matches ) ) {
 187                                         $machineID = $matches[1];
 188                                         $dbName = $matches[2];
 189                                         $tblName = $matches[3];
 190                                         $index = $matches[4];
 191                                         if ( $machineID == 0 ) {
 192                                                 # Current connection
 193                                                 $db =& $this->getDB();
 194                                         } else {
 195                                                 # Alternate connection
 196                                                 $db =& $wgLoadBalancer->getConnection( $machineID );
 197
 198                                                 if ( array_key_exists( $machineId, $wgKnownMysqlServers ) ) {
 199                                                         # Try to open, return false on failure
 200                                                         $params = $wgKnownDBServers[$machineId];
 201                                                         $db = Database::newFromParams( $params['server'], $params['user'], $params['password'],
 202                                                                 $dbName, 1, DBO_IGNORE );
 203                                                 }
 204                                         }
 205                                         if ( $db->isOpen() ) {
 206                                                 $index = $db->strencode( $index );
 207                                                 $res = $db->query( "SELECT blob_data FROM $dbName.$tblName " .
 208                                                         "WHERE blob_index='$index' " . $this->getSelectOptions(), $fname );
 209                                                 $row = $db->fetchObject( $res );
 210                                                 $text = $row->text_data;
 211                                         }
 212                                 }
 213                                 break;
 214                         case 'file':
 215                                 # File locations are of the form file://<filename>, relative to the current directory
 216                                 if ( preg_match( '/^file:\/\/(.*)$', $location, $matches ) )
 217                                 $filename = strstr( $location, 'file://' );
 218                                 $text = @file_get_contents( $matches[1] );
 219                 }
 220                 if ( $text !== false ) {
 221                         # Got text, now we need to interpret it
 222                         # The first line contains information about how to do this
 223                         $p = strpos( $text, '\n' );
 224                         $type = substr( $text, 0, $p );
 225                         $text = substr( $text, $p + 1 );
 226                         switch ( $type ) {
 227                                 case 'plain':
 228                                         break;
 229                                 case 'gzip':
 230                                         $text = gzinflate( $text );
 231                                         break;
 232                                 case 'object':
 233                                         $object = unserialize( $text );
 234                                         $text = $object->getItem( $hash );
 235                                         break;
 236                                 default:
 237                                         $text = false;
 238                         }
 239                 }
 240                 wfProfileOut( $fname );
 241                 return $text;
 242         }
 243
 244         /**
 245          * Note that getContent/loadContent may follow redirects if
 246          * not told otherwise, and so may cause a change to mTitle.
 247          *
 248          * @param $noredir
 249          * @return Return the text of this revision
 250         */
 251         function getContent( $noredir ) {
 252                 global $wgRequest;
 253
 254                 # Get variables from query string :P
 255                 $action = $wgRequest->getText( 'action', 'view' );
 256                 $section = $wgRequest->getText( 'section' );
 257
 258                 $fname =  'Article::getContent';
 259                 wfProfileIn( $fname );
 260
 261                 if ( 0 == $this->getID() ) {
 262                         if ( 'edit' == $action ) {
 263                                 wfProfileOut( $fname );
 264                                 return ''; # was "newarticletext", now moved above the box)
 265                         }
 266                         wfProfileOut( $fname );
 267                         return wfMsg( 'noarticletext' );
 268                 } else {
 269                         $this->loadContent( $noredir );
 270                         # check if we're displaying a [[User talk:x.x.x.x]] anonymous talk page
 271                         if ( $this->mTitle->getNamespace() == NS_USER_TALK &&
 272                           preg_match('/^\d{1,3}\.\d{1,3}.\d{1,3}\.\d{1,3}$/',$this->mTitle->getText()) &&
 273                           $action=='view'
 274                         ) {
 275                                 wfProfileOut( $fname );
 276                                 return $this->mContent . "\n" .wfMsg('anontalkpagetext');
 277                         } else {
 278                                 if($action=='edit') {
 279                                         if($section!='') {
 280                                                 if($section=='new') {
 281                                                         wfProfileOut( $fname );
 282                                                         return '';
 283                                                 }
 284
 285                                                 # strip NOWIKI etc. to avoid confusion (true-parameter causes HTML
 286                                                 # comments to be stripped as well)
 287                                                 $rv=$this->getSection($this->mContent,$section);
 288                                                 wfProfileOut( $fname );
 289                                                 return $rv;
 290                                         }
 291                                 }
 292                                 wfProfileOut( $fname );
 293                                 return $this->mContent;
 294                         }
 295                 }
 296         }
 297
 298         /**
 299          * This function returns the text of a section, specified by a number ($section).
 300          * A section is text under a heading like == Heading == or <h1>Heading</h1>, or
 301          * the first section before any such heading (section 0).
 302          *
 303          * If a section contains subsections, these are also returned.
 304          *
 305          * @param string $text text to look in
 306          * @param integer $section section number
 307          * @return string text of the requested section
 308          */
 309         function getSection($text,$section) {
 310
 311                 # strip NOWIKI etc. to avoid confusion (true-parameter causes HTML
 312                 # comments to be stripped as well)
 313                 $striparray=array();
 314                 $parser=new Parser();
 315                 $parser->mOutputType=OT_WIKI;
 316                 $striptext=$parser->strip($text, $striparray, true);
 317
 318                 # now that we can be sure that no pseudo-sections are in the source,
 319                 # split it up by section
 320                 $secs =
 321                   preg_split(
 322                   '/(^=+.+?=+|^<h[1-6].*?' . '>.*?<\/h[1-6].*?' . '>)(?!\S)/mi',
 323                   $striptext, -1,
 324                   PREG_SPLIT_DELIM_CAPTURE);
 325                 if($section==0) {
 326                         $rv=$secs[0];
 327                 } else {
 328                         $headline=$secs[$section*2-1];
 329                         preg_match( '/^(=+).+?=+|^<h([1-6]).*?' . '>.*?<\/h[1-6].*?' . '>(?!\S)/mi',$headline,$matches);
 330                         $hlevel=$matches[1];
 331
 332                         # translate wiki heading into level
 333                         if(strpos($hlevel,'=')!==false) {
 334                                 $hlevel=strlen($hlevel);
 335                         }
 336
 337                         $rv=$headline. $secs[$section*2];
 338                         $count=$section+1;
 339
 340                         $break=false;
 341                         while(!empty($secs[$count*2-1]) && !$break) {
 342
 343                                 $subheadline=$secs[$count*2-1];
 344                                 preg_match( '/^(=+).+?=+|^<h([1-6]).*?' . '>.*?<\/h[1-6].*?' . '>(?!\S)/mi',$subheadline,$matches);
 345                                 $subhlevel=$matches[1];
 346                                 if(strpos($subhlevel,'=')!==false) {
 347                                         $subhlevel=strlen($subhlevel);
 348                                 }
 349                                 if($subhlevel > $hlevel) {
 350                                         $rv.=$subheadline.$secs[$count*2];
 351                                 }
 352                                 if($subhlevel <= $hlevel) {
 353                                         $break=true;
 354                                 }
 355                                 $count++;
 356
 357                         }
 358                 }
 359                 # reinsert stripped tags
 360                 $rv=$parser->unstrip($rv,$striparray);
 361                 $rv=$parser->unstripNoWiki($rv,$striparray);
 362                 $rv=trim($rv);
 363                 return $rv;
 364
 365         }
 366
 367         /**
 368          * Return an array of the columns of the "cur"-table
 369          */
 370         function &getCurContentFields() {
 371                 global $wgArticleCurContentFields;
 372                 if ( !$wgArticleCurContentFields ) {
 373                         $wgArticleCurContentFields = array( 'cur_text','cur_timestamp','cur_user', 'cur_user_text',
 374                           'cur_comment','cur_counter','cur_restrictions','cur_touched' );
 375                 }
 376                 return $wgArticleCurContentFields;
 377         }
 378
 379         /**
 380          * Return an array of the columns of the "old"-table
 381          */
 382         function &getOldContentFields() {
 383                 global $wgArticleOldContentFields;
 384                 if ( !$wgArticleOldContentFields ) {
 385                         $wgArticleOldContentFields = array( 'old_namespace','old_title','old_text','old_timestamp',
 386                           'old_user','old_user_text','old_comment','old_flags' );
 387                 }
 388                 return $wgArticleOldContentFields;
 389         }
 390
 391         /**
 392          * Load the revision (including cur_text) into this object
 393         */
 394         function loadContent( $noredir = false ) {
 395                 global $wgOut, $wgRequest;
 396
 397                 if ( $this->mContentLoaded ) return;
 398
 399                 $dbr =& $this->getDB();
 400                 # Query variables :P
 401                 $oldid = $wgRequest->getVal( 'oldid' );
 402                 $redirect = $wgRequest->getVal( 'redirect' );
 403
 404                 $fname = 'Article::loadContent';
 405
 406                 # Pre-fill content with error message so that if something
 407                 # fails we'll have something telling us what we intended.
 408
 409                 $t = $this->mTitle->getPrefixedText();
 410                 if ( isset( $oldid ) ) {
 411                         $oldid = IntVal( $oldid );
 412                         $t .= ',oldid='.$oldid;
 413                 }
 414                 if ( isset( $redirect ) ) {
 415                         $redirect = ($redirect == 'no') ? 'no' : 'yes';
 416                         $t .= ',redirect='.$redirect;
 417                 }
 418                 $this->mContent = wfMsg( 'missingarticle', $t );
 419
 420                 if ( ! $oldid ) {       # Retrieve current version
 421                         $id = $this->getID();
 422                         if ( 0 == $id ) return;
 423
 424                         $s = $dbr->selectRow( 'cur', $this->getCurContentFields(), array( 'cur_id' => $id ), $fname,
 425                                 $this->getSelectOptions() );
 426                         if ( $s === false ) {
 427                                 return;
 428                         }
 429
 430                         # If we got a redirect, follow it (unless we've been told
 431                         # not to by either the function parameter or the query
 432                         if ( ( 'no' != $redirect ) && ( false == $noredir ) ) {
 433                                 $rt = Title::newFromRedirect( $s->cur_text );
 434                                 # process if title object is valid and not special:userlogout
 435                                 if ( $rt && ! ( $rt->getNamespace() == NS_SPECIAL && $rt->getText() == 'Userlogout' ) ) {
 436                                         # Gotta hand redirects to special pages differently:
 437                                         # Fill the HTTP response "Location" header and ignore
 438                                         # the rest of the page we're on.
 439
 440                                         if ( $rt->getInterwiki() != '' ) {
 441                                                 $wgOut->redirect( $rt->getFullURL() ) ;
 442                                                 return;
 443                                         }
 444                                         if ( $rt->getNamespace() == NS_SPECIAL ) {
 445                                                 $wgOut->redirect( $rt->getFullURL() );
 446                                                 return;
 447                                         }
 448                                         $rid = $rt->getArticleID();
 449                                         if ( 0 != $rid ) {
 450                                                 $redirRow = $dbr->selectRow( 'cur', $this->getCurContentFields(),
 451                                                         array( 'cur_id' => $rid ), $fname, $this->getSelectOptions() );
 452
 453                                                 if ( $redirRow !== false ) {
 454                                                         $this->mRedirectedFrom = $this->mTitle->getPrefixedText();
 455                                                         $this->mTitle = $rt;
 456                                                         $s = $redirRow;
 457                                                 }
 458                                         }
 459                                 }
 460                         }
 461
 462                         $this->mContent = $s->cur_text;
 463                         $this->mUser = $s->cur_user;
 464                         $this->mUserText = $s->cur_user_text;
 465                         $this->mComment = $s->cur_comment;
 466                         $this->mCounter = $s->cur_counter;
 467                         $this->mTimestamp = wfTimestamp(TS_MW,$s->cur_timestamp);
 468                         $this->mTouched = wfTimestamp(TS_MW,$s->cur_touched);
 469                         $this->mTitle->mRestrictions = explode( ',', trim( $s->cur_restrictions ) );
 470                         $this->mTitle->mRestrictionsLoaded = true;
 471                 } else { # oldid set, retrieve historical version
 472                         $s = $dbr->getArray( 'old', $this->getOldContentFields(), array( 'old_id' => $oldid ),
 473                                 $fname, $this->getSelectOptions() );
 474                         if ( $s === false ) {
 475                                 return;
 476                         }
 477
 478                         if( $this->mTitle->getNamespace() != $s->old_namespace ||
 479                                 $this->mTitle->getDBkey() != $s->old_title ) {
 480                                 $oldTitle = Title::makeTitle( $s->old_namesapce, $s->old_title );
 481                                 $this->mTitle = $oldTitle;
 482                                 $wgTitle = $oldTitle;
 483                         }
 484                         $this->mContent = Article::getRevisionText( $s );
 485                         $this->mUser = $s->old_user;
 486                         $this->mUserText = $s->old_user_text;
 487                         $this->mComment = $s->old_comment;
 488                         $this->mCounter = 0;
 489                         $this->mTimestamp = wfTimestamp(TS_MW,$s->old_timestamp);
 490                 }
 491                 $this->mContentLoaded = true;
 492                 return $this->mContent;
 493         }
 494
 495         /**
 496          * Gets the article text without using so many damn globals
 497          * Returns false on error
 498          *
 499          * @param integer $oldid
 500          */
 501         function getContentWithoutUsingSoManyDamnGlobals( $oldid = 0, $noredir = false ) {
 502                 if ( $this->mContentLoaded ) {
 503                         return $this->mContent;
 504                 }
 505                 $this->mContent = false;
 506
 507                 $fname = 'Article::getContentWithout';
 508                 $dbr =& $this->getDB();
 509
 510                 if ( ! $oldid ) {       # Retrieve current version
 511                         $id = $this->getID();
 512                         if ( 0 == $id ) {
 513                                 return false;
 514                         }
 515
 516                         $s = $dbr->selectRow( 'cur', $this->getCurContentFields(), array( 'cur_id' => $id ),
 517                                 $fname, $this->getSelectOptions() );
 518                         if ( $s === false ) {
 519                                 return false;
 520                         }
 521
 522                         # If we got a redirect, follow it (unless we've been told
 523                         # not to by either the function parameter or the query
 524                         if ( !$noredir ) {
 525                                 $rt = Title::newFromRedirect( $s->cur_text );
 526                                 if( $rt &&  $rt->getInterwiki() == '' && $rt->getNamespace() != NS_SPECIAL ) {
 527                                         $rid = $rt->getArticleID();
 528                                         if ( 0 != $rid ) {
 529                                                 $redirRow = $dbr->selectRow( 'cur', $this->getCurContentFields(),
 530                                                         array( 'cur_id' => $rid ), $fname, $this->getSelectOptions() );
 531
 532                                                 if ( $redirRow !== false ) {
 533                                                         $this->mRedirectedFrom = $this->mTitle->getPrefixedText();
 534                                                         $this->mTitle = $rt;
 535                                                         $s = $redirRow;
 536                                                 }
 537                                         }
 538                                 }
 539                         }
 540
 541                         $this->mContent = $s->cur_text;
 542                         $this->mUser = $s->cur_user;
 543                         $this->mUserText = $s->cur_user_text;
 544                         $this->mComment = $s->cur_comment;
 545                         $this->mCounter = $s->cur_counter;
 546                         $this->mTimestamp = wfTimestamp(TS_MW,$s->cur_timestamp);
 547                         $this->mTouched = wfTimestamp(TS_MW,$s->cur_touched);
 548                         $this->mTitle->mRestrictions = explode( ',', trim( $s->cur_restrictions ) );
 549                         $this->mTitle->mRestrictionsLoaded = true;
 550                 } else { # oldid set, retrieve historical version
 551                         $s = $dbr->selectRow( 'old', $this->getOldContentFields(), array( 'old_id' => $oldid ),
 552                                 $fname, $this->getSelectOptions() );
 553                         if ( $s === false ) {
 554                                 return false;
 555                         }
 556                         $this->mContent = Article::getRevisionText( $s );
 557                         $this->mUser = $s->old_user;
 558                         $this->mUserText = $s->old_user_text;
 559                         $this->mComment = $s->old_comment;
 560                         $this->mCounter = 0;
 561                         $this->mTimestamp = wfTimestamp(TS_MW,$s->old_timestamp);
 562                 }
 563                 $this->mContentLoaded = true;
 564                 return $this->mContent;
 565         }
 566
 567         /**
 568          * Read/write accessor to select FOR UPDATE
 569          */
 570         function forUpdate( $x = NULL ) {
 571                 return wfSetVar( $this->mForUpdate, $x );
 572         }
 573
 574         /**
 575          * Get the database which should be used for reads
 576          */
 577         function &getDB() {
 578                 if ( $this->mForUpdate ) {
 579                         return wfGetDB( DB_MASTER );
 580                 } else {
 581                         return wfGetDB( DB_SLAVE );
 582                 }
 583         }
 584
 585         /**
 586          * Get options for all SELECT statements
 587          * Can pass an option array, to which the class-wide options will be appended
 588          */
 589         function getSelectOptions( $options = '' ) {
 590                 if ( $this->mForUpdate ) {
 591                         if ( $options ) {
 592                                 $options[] = 'FOR UPDATE';
 593                         } else {
 594                                 $options = 'FOR UPDATE';
 595                         }
 596                 }
 597                 return $options;
 598         }
 599
 600         /**
 601          * Return the Article ID
 602          */
 603         function getID() {
 604                 if( $this->mTitle ) {
 605                         return $this->mTitle->getArticleID();
 606                 } else {
 607                         return 0;
 608                 }
 609         }
 610
 611         /**
 612          * Get the view count for this article
 613          */
 614         function getCount() {
 615                 if ( -1 == $this->mCounter ) {
 616                         $id = $this->getID();
 617                         $dbr =& $this->getDB();
 618                         $this->mCounter = $dbr->selectField( 'cur', 'cur_counter', 'cur_id='.$id,
 619                                 'Article::getCount', $this->getSelectOptions() );
 620                 }
 621                 return $this->mCounter;
 622         }
 623
 624         /**
 625          * Would the given text make this article a "good" article (i.e.,
 626          * suitable for including in the article count)?
 627          */
 628         function isCountable( $text ) {
 629                 global $wgUseCommaCount;
 630
 631                 if ( 0 != $this->mTitle->getNamespace() ) { return 0; }
 632                 if ( $this->isRedirect( $text ) ) { return 0; }
 633                 $token = ($wgUseCommaCount ? ',' : '[[' );
 634                 if ( false === strstr( $text, $token ) ) { return 0; }
 635                 return 1;
 636         }
 637
 638         /**
 639          * Tests if the article text represents a redirect
 640          */
 641         function isRedirect( $text = false ) {
 642                 if ( $text === false ) {
 643                         $this->loadContent();
 644                         $titleObj = Title::newFromRedirect( $this->mText );
 645                 } else {
 646                         $titleObj = Title::newFromRedirect( $text );
 647                 }
 648                 return $titleObj !== NULL;
 649         }
 650
 651         /**
 652          * Loads everything from cur except cur_text
 653          * This isn't necessary for all uses, so it's only done if needed.
 654          * @private
 655          */
 656         function loadLastEdit() {
 657                 global $wgOut;
 658                 if ( -1 != $this->mUser ) return;
 659
 660                 $fname = 'Article::loadLastEdit';
 661
 662                 $dbr =& $this->getDB();
 663                 $s = $dbr->getArray( 'cur',
 664                   array( 'cur_user','cur_user_text','cur_timestamp', 'cur_comment','cur_minor_edit' ),
 665                   array( 'cur_id' => $this->getID() ), $fname, $this->getSelectOptions() );
 666
 667                 if ( $s !== false ) {
 668                         $this->mUser = $s->cur_user;
 669                         $this->mUserText = $s->cur_user_text;
 670                         $this->mTimestamp = wfTimestamp(TS_MW,$s->cur_timestamp);
 671                         $this->mComment = $s->cur_comment;
 672                         $this->mMinorEdit = $s->cur_minor_edit;
 673                 }
 674         }
 675
 676         function getTimestamp() {
 677                 $this->loadLastEdit();
 678                 return $this->mTimestamp;
 679         }
 680
 681         function getUser() {
 682                 $this->loadLastEdit();
 683                 return $this->mUser;
 684         }
 685
 686         function getUserText() {
 687                 $this->loadLastEdit();
 688                 return $this->mUserText;
 689         }
 690
 691         function getComment() {
 692                 $this->loadLastEdit();
 693                 return $this->mComment;
 694         }
 695
 696         function getMinorEdit() {
 697                 $this->loadLastEdit();
 698                 return $this->mMinorEdit;
 699         }
 700
 701         function getContributors($limit = 0, $offset = 0) {
 702                 $fname = 'Article::getContributors';
 703
 704                 # XXX: this is expensive; cache this info somewhere.
 705
 706                 $title = $this->mTitle;
 707                 $contribs = array();
 708                 $dbr =& $this->getDB();
 709                 $oldTable = $dbr->tableName( 'old' );
 710                 $userTable = $dbr->tableName( 'user' );
 711                 $encDBkey = $dbr->addQuotes( $title->getDBkey() );
 712                 $ns = $title->getNamespace();
 713                 $user = $this->getUser();
 714
 715                 $sql = "SELECT old_user, old_user_text, user_real_name, MAX(old_timestamp) as timestamp
 716                         FROM $oldTable LEFT JOIN $userTable ON old_user = user_id
 717                         WHERE old_namespace = $user
 718                         AND old_title = $encDBkey
 719                         AND old_user != $user
 720                         GROUP BY old_user, old_user_text, user_real_name
 721                         ORDER BY timestamp DESC";
 722
 723                 if ($limit > 0) { $sql .= ' LIMIT '.$limit; }
 724                 $sql .= ' '. $this->getSelectOptions();
 725
 726                 $res = $dbr->query($sql, $fname);
 727
 728                 while ( $line = $dbr->fetchObject( $res ) ) {
 729                         $contribs[] = array($line->old_user, $line->old_user_text, $line->user_real_name);
 730                 }
 731
 732                 $dbr->freeResult($res);
 733                 return $contribs;
 734         }
 735
 736         /**
 737          * This is the default action of the script: just view the page of
 738          * the given title.
 739         */
 740         function view() {
 741                 global $wgUser, $wgOut, $wgLang, $wgRequest, $wgOnlySysopsCanPatrol;
 742                 global $wgLinkCache, $IP, $wgEnableParserCache, $wgStylePath, $wgUseRCPatrol;
 743                 $sk = $wgUser->getSkin();
 744
 745                 $fname = 'Article::view';
 746                 wfProfileIn( $fname );
 747                 # Get variables from query string
 748                 $oldid = $wgRequest->getVal( 'oldid' );
 749                 $diff = $wgRequest->getVal( 'diff' );
 750                 $rcid = $wgRequest->getVal( 'rcid' );
 751
 752                 $wgOut->setArticleFlag( true );
 753                 $wgOut->setRobotpolicy( 'index,follow' );
 754                 # If we got diff and oldid in the query, we want to see a
 755                 # diff page instead of the article.
 756
 757                 if ( !is_null( $diff ) ) {
 758                         require_once( 'DifferenceEngine.php' );
 759                         $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
 760                         $de = new DifferenceEngine( $oldid, $diff, $rcid );
 761                         $de->showDiffPage();
 762                         wfProfileOut( $fname );
 763                         if( $diff == 0 ) {
 764                                 # Run view updates for current revision only
 765                                 $this->viewUpdates();
 766                         }
 767                         return;
 768                 }
 769                 if ( empty( $oldid ) && $this->checkTouched() ) {
 770                         if( $wgOut->checkLastModified( $this->mTouched ) ){
 771                                 return;
 772                         } else if ( $this->tryFileCache() ) {
 773                                 # tell wgOut that output is taken care of
 774                                 $wgOut->disable();
 775                                 $this->viewUpdates();
 776                                 return;
 777                         }
 778                 }
 779                 # Should the parser cache be used?
 780                 if ( $wgEnableParserCache && intval($wgUser->getOption( 'stubthreshold' )) == 0 && empty( $oldid ) ) {
 781                         $pcache = true;
 782                 } else {
 783                         $pcache = false;
 784                 }
 785
 786                 $outputDone = false;
 787                 if ( $pcache ) {
 788                         if ( $wgOut->tryParserCache( $this, $wgUser ) ) {
 789                                 $outputDone = true;
 790                         }
 791                 }
 792                 if ( !$outputDone ) {
 793                         $text = $this->getContent( false ); # May change mTitle by following a redirect
 794
 795                         # Another whitelist check in case oldid or redirects are altering the title
 796                         if ( !$this->mTitle->userCanRead() ) {
 797                                 $wgOut->loginToUse();
 798                                 $wgOut->output();
 799                                 exit;
 800                         }
 801
 802
 803                         # We're looking at an old revision
 804
 805                         if ( !empty( $oldid ) ) {
 806                                 $this->setOldSubtitle();
 807                                 $wgOut->setRobotpolicy( 'noindex,follow' );
 808                         }
 809                         if ( '' != $this->mRedirectedFrom ) {
 810                                 $sk = $wgUser->getSkin();
 811                                 $redir = $sk->makeKnownLink( $this->mRedirectedFrom, '',
 812                                   'redirect=no' );
 813                                 $s = wfMsg( 'redirectedfrom', $redir );
 814                                 $wgOut->setSubtitle( $s );
 815
 816                                 # Can't cache redirects
 817                                 $pcache = false;
 818                         }
 819
 820                         # wrap user css and user js in pre and don't parse
 821                         # XXX: use $this->mTitle->usCssJsSubpage() when php is fixed/ a workaround is found
 822                         if (
 823                                 $this->mTitle->getNamespace() == NS_USER &&
 824                                 preg_match('/\\/[\\w]+\\.(css|js)$/', $this->mTitle->getDBkey())
 825                         ) {
 826                                 $wgOut->addWikiText( wfMsg('clearyourcache'));
 827                                 $wgOut->addHTML( '<pre>'.htmlspecialchars($this->mContent)."\n</pre>" );
 828                         } else if ( $rt = Title::newFromRedirect( $text ) ) {
 829                                 # Display redirect
 830                                 $imageUrl = $wgStylePath.'/common/images/redirect.png';
 831                                 $targetUrl = $rt->escapeLocalURL();
 832                                 $titleText = htmlspecialchars( $rt->getPrefixedText() );
 833                                 $link = $sk->makeLinkObj( $rt );
 834                                 $wgOut->addHTML( '<img valign="center" src="'.$imageUrl.'">' .
 835                                   '<span class="redirectText">'.$link.'</span>' );
 836                         } else if ( $pcache ) {
 837                                 # Display content and save to parser cache
 838                                 $wgOut->addPrimaryWikiText( $text, $this );
 839                         } else {
 840                                 # Display content, don't attempt to save to parser cache
 841                                 $wgOut->addWikiText( $text );
 842                         }
 843                 }
 844                 $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
 845                 # If we have been passed an &rcid= parameter, we want to give the user a
 846                 # chance to mark this new article as patrolled.
 847                 if ( $wgUseRCPatrol && !is_null ( $rcid ) && $rcid != 0 && $wgUser->getID() != 0 &&
 848                      ( $wgUser->isSysop() || !$wgOnlySysopsCanPatrol ) )
 849                 {
 850                         $wgOut->addHTML( wfMsg ( 'markaspatrolledlink',
 851                                 $sk->makeKnownLinkObj ( $this->mTitle, wfMsg ( 'markaspatrolledtext' ),
 852                                         'action=markpatrolled&rcid='.$rcid )
 853                          ) );
 854                 }
 855
 856                 # Put link titles into the link cache
 857                 $wgOut->transformBuffer();
 858
 859                 # Add link titles as META keywords
 860                 $wgOut->addMetaTags() ;
 861
 862                 $this->viewUpdates();
 863                 wfProfileOut( $fname );
 864         }
 865
 866         /**
 867          * Theoretically we could defer these whole insert and update
 868          * functions for after display, but that's taking a big leap
 869          * of faith, and we want to be able to report database
 870          * errors at some point.
 871          * @private
 872          */
 873         function insertNewArticle( $text, $summary, $isminor, $watchthis ) {
 874                 global $wgOut, $wgUser;
 875                 global $wgUseSquid, $wgDeferredUpdateList, $wgInternalServer;
 876
 877                 $fname = 'Article::insertNewArticle';
 878
 879                 $this->mCountAdjustment = $this->isCountable( $text );
 880
 881                 $ns = $this->mTitle->getNamespace();
 882                 $ttl = $this->mTitle->getDBkey();
 883                 $text = $this->preSaveTransform( $text );
 884                 if ( $this->isRedirect( $text ) ) { $redir = 1; }
 885                 else { $redir = 0; }
 886
 887                 $now = wfTimestampNow();
 888                 $won = wfInvertTimestamp( $now );
 889                 wfSeedRandom();
 890                 $rand = number_format( mt_rand() / mt_getrandmax(), 12, '.', '' );
 891                 $dbw =& wfGetDB( DB_MASTER );
 892
 893                 $cur_id = $dbw->nextSequenceValue( 'cur_cur_id_seq' );
 894
 895                 $isminor = ( $isminor && $wgUser->getID() ) ? 1 : 0;
 896
 897                 $dbw->insertArray( 'cur', array(
 898                         'cur_id' => $cur_id,
 899                         'cur_namespace' => $ns,
 900                         'cur_title' => $ttl,
 901                         'cur_text' => $text,
 902                         'cur_comment' => $summary,
 903                         'cur_user' => $wgUser->getID(),
 904                         'cur_timestamp' => $dbw->timestamp($now),
 905                         'cur_minor_edit' => $isminor,
 906                         'cur_counter' => 0,
 907                         'cur_restrictions' => '',
 908                         'cur_user_text' => $wgUser->getName(),
 909                         'cur_is_redirect' => $redir,
 910                         'cur_is_new' => 1,
 911                         'cur_random' => $rand,
 912                         'cur_touched' => $dbw->timestamp($now),
 913                         'inverse_timestamp' => $won,
 914                 ), $fname );
 915
 916                 $newid = $dbw->insertId();
 917                 $this->mTitle->resetArticleID( $newid );
 918
 919                 Article::onArticleCreate( $this->mTitle );
 920                 RecentChange::notifyNew( $now, $this->mTitle, $isminor, $wgUser, $summary );
 921
 922                 if ($watchthis) {
 923                         if(!$this->mTitle->userIsWatching()) $this->watch();
 924                 } else {
 925                         if ( $this->mTitle->userIsWatching() ) {
 926                                 $this->unwatch();
 927                         }
 928                 }
 929
 930                 # The talk page isn't in the regular link tables, so we need to update manually:
 931                 $talkns = $ns ^ 1; # talk -> normal; normal -> talk
 932                 $dbw->updateArray( 'cur', array('cur_touched' => $dbw->timestamp($now) ),
 933                         array(  'cur_namespace' => $talkns, 'cur_title' => $ttl ), $fname );
 934
 935                 # standard deferred updates
 936                 $this->editUpdates( $text );
 937
 938                 $this->showArticle( $text, wfMsg( 'newarticle' ) );
 939         }
 940
 941
 942         /**
 943          * Side effects: loads last edit if $edittime is NULL
 944          */
 945         function getTextOfLastEditWithSectionReplacedOrAdded($section, $text, $summary = '', $edittime = NULL) {
 946                 $fname = 'Article::getTextOfLastEditWithSectionReplacedOrAdded';
 947                 if(is_null($edittime)) {
 948                         $this->loadLastEdit();
 949                         $oldtext = $this->getContent( true );
 950                 } else {
 951                         $dbw =& wfGetDB( DB_MASTER );
 952                         $ns = $this->mTitle->getNamespace();
 953                         $title = $this->mTitle->getDBkey();
 954                         $obj = $dbw->getArray( 'old',
 955                                 array( 'old_text','old_flags'),
 956                                 array( 'old_namespace' => $ns, 'old_title' => $title,
 957                                         'old_timestamp' => $dbw->timestamp($edittime)),
 958                                 $fname );
 959                         $oldtext = Article::getRevisionText( $obj );
 960                 }
 961                 if ($section != '') {
 962                         if($section=='new') {
 963                                 if($summary) $subject="== {$summary} ==\n\n";
 964                                 $text=$oldtext."\n\n".$subject.$text;
 965                         } else {
 966
 967                                 # strip NOWIKI etc. to avoid confusion (true-parameter causes HTML
 968                                 # comments to be stripped as well)
 969                                 $striparray=array();
 970                                 $parser=new Parser();
 971                                 $parser->mOutputType=OT_WIKI;
 972                                 $oldtext=$parser->strip($oldtext, $striparray, true);
 973
 974                                 # now that we can be sure that no pseudo-sections are in the source,
 975                                 # split it up
 976                                 # Unfortunately we can't simply do a preg_replace because that might
 977                                 # replace the wrong section, so we have to use the section counter instead
 978                                 $secs=preg_split('/(^=+.+?=+|^<h[1-6].*?' . '>.*?<\/h[1-6].*?' . '>)(?!\S)/mi',
 979                                   $oldtext,-1,PREG_SPLIT_DELIM_CAPTURE);
 980                                 $secs[$section*2]=$text."\n\n"; // replace with edited
 981
 982                                 # section 0 is top (intro) section
 983                                 if($section!=0) {
 984
 985                                         # headline of old section - we need to go through this section
 986                                         # to determine if there are any subsections that now need to
 987                                         # be erased, as the mother section has been replaced with
 988                                         # the text of all subsections.
 989                                         $headline=$secs[$section*2-1];
 990                                         preg_match( '/^(=+).+?=+|^<h([1-6]).*?' . '>.*?<\/h[1-6].*?' . '>(?!\S)/mi',$headline,$matches);
 991                                         $hlevel=$matches[1];
 992
 993                                         # determine headline level for wikimarkup headings
 994                                         if(strpos($hlevel,'=')!==false) {
 995                                                 $hlevel=strlen($hlevel);
 996                                         }
 997
 998                                         $secs[$section*2-1]=''; // erase old headline
 999                                         $count=$section+1;
1000                                         $break=false;
1001                                         while(!empty($secs[$count*2-1]) && !$break) {
1002
1003                                                 $subheadline=$secs[$count*2-1];
1004                                                 preg_match(
1005                                                  '/^(=+).+?=+|^<h([1-6]).*?' . '>.*?<\/h[1-6].*?' . '>(?!\S)/mi',$subheadline,$matches);
1006                                                 $subhlevel=$matches[1];
1007                                                 if(strpos($subhlevel,'=')!==false) {
1008                                                         $subhlevel=strlen($subhlevel);
1009                                                 }
1010                                                 if($subhlevel > $hlevel) {
1011                                                         // erase old subsections
1012                                                         $secs[$count*2-1]='';
1013                                                         $secs[$count*2]='';
1014                                                 }
1015                                                 if($subhlevel <= $hlevel) {
1016                                                         $break=true;
1017                                                 }
1018                                                 $count++;
1019
1020                                         }
1021
1022                                 }
1023                                 $text=join('',$secs);
1024                                 # reinsert the stuff that we stripped out earlier
1025                                 $text=$parser->unstrip($text,$striparray);
1026                                 $text=$parser->unstripNoWiki($text,$striparray);
1027                         }
1028
1029                 }
1030                 return $text;
1031         }
1032
1033         /**
1034          * Change an existing article. Puts the previous version back into the old table, updates RC
1035          * and all necessary caches, mostly via the deferred update array.
1036          *
1037          * It is possible to call this function from a command-line script, but note that you should
1038          * first set $wgUser, and clean up $wgDeferredUpdates after each edit.
1039          */
1040         function updateArticle( $text, $summary, $minor, $watchthis, $forceBot = false, $sectionanchor = '' ) {
1041                 global $wgOut, $wgUser;
1042                 global $wgDBtransactions, $wgMwRedir;
1043                 global $wgUseSquid, $wgInternalServer;
1044
1045                 $fname = 'Article::updateArticle';
1046                 $good = true;
1047
1048                 if ( $this->mMinorEdit ) { $me1 = 1; } else { $me1 = 0; }
1049                 if ( $minor && $wgUser->getID() ) { $me2 = 1; } else { $me2 = 0; }
1050                 if ( $this->isRedirect( $text ) ) {
1051                         # Remove all content but redirect
1052                         # This could be done by reconstructing the redirect from a title given by
1053                         # Title::newFromRedirect(), but then we wouldn't know which synonym the user
1054                         # wants to see
1055                         if ( preg_match( "/^((" . $wgMwRedir->getBaseRegex() . ')[^\\n]+)/i', $text, $m ) ) {
1056                                 $redir = 1;
1057                                 $text = $m[1] . "\n";
1058                         }
1059                 }
1060                 else { $redir = 0; }
1061
1062                 $text = $this->preSaveTransform( $text );
1063                 $dbw =& wfGetDB( DB_MASTER );
1064
1065                 # Update article, but only if changed.
1066
1067                 # It's important that we either rollback or complete, otherwise an attacker could
1068                 # overwrite cur entries by sending precisely timed user aborts. Random bored users
1069                 # could conceivably have the same effect, especially if cur is locked for long periods.
1070                 if( $wgDBtransactions ) {
1071                         $dbw->query( 'BEGIN', $fname );
1072                 } else {
1073                         $userAbort = ignore_user_abort( true );
1074                 }
1075
1076                 $oldtext = $this->getContent( true );
1077
1078                 if ( 0 != strcmp( $text, $oldtext ) ) {
1079                         $this->mCountAdjustment = $this->isCountable( $text )
1080                           - $this->isCountable( $oldtext );
1081                         $now = wfTimestampNow();
1082                         $won = wfInvertTimestamp( $now );
1083
1084                         # First update the cur row
1085                         $dbw->updateArray( 'cur',
1086                                 array( /* SET */
1087                                         'cur_text' => $text,
1088                                         'cur_comment' => $summary,
1089                                         'cur_minor_edit' => $me2,
1090                                         'cur_user' => $wgUser->getID(),
1091                                         'cur_timestamp' => $dbw->timestamp($now),
1092                                         'cur_user_text' => $wgUser->getName(),
1093                                         'cur_is_redirect' => $redir,
1094                                         'cur_is_new' => 0,
1095                                         'cur_touched' => $dbw->timestamp($now),
1096                                         'inverse_timestamp' => $won
1097                                 ), array( /* WHERE */
1098                                         'cur_id' => $this->getID(),
1099                                         'cur_timestamp' => $dbw->timestamp($this->getTimestamp())
1100                                 ), $fname
1101                         );
1102
1103                         if( $dbw->affectedRows() == 0 ) {
1104                                 /* Belated edit conflict! Run away!! */
1105                                 $good = false;
1106                         } else {
1107                                 # Now insert the previous revision into old
1108
1109                                 # This overwrites $oldtext if revision compression is on
1110                                 $flags = Article::compressRevisionText( $oldtext );
1111
1112                                 $dbw->insertArray( 'old',
1113                                         array(
1114                                                 'old_id' => $dbw->nextSequenceValue( 'old_old_id_seq' ),
1115                                                 'old_namespace' => $this->mTitle->getNamespace(),
1116                                                 'old_title' => $this->mTitle->getDBkey(),
1117                                                 'old_text' => $oldtext,
1118                                                 'old_comment' => $this->getComment(),
1119                                                 'old_user' => $this->getUser(),
1120                                                 'old_user_text' => $this->getUserText(),
1121                                                 'old_timestamp' => $dbw->timestamp($this->getTimestamp()),
1122                                                 'old_minor_edit' => $me1,
1123                                                 'inverse_timestamp' => wfInvertTimestamp( $this->getTimestamp() ),
1124                                                 'old_flags' => $flags,
1125                                         ), $fname
1126                                 );
1127
1128                                 $oldid = $dbw->insertId();
1129
1130                                 $bot = (int)($wgUser->isBot() || $forceBot);
1131                                 RecentChange::notifyEdit( $now, $this->mTitle, $me2, $wgUser, $summary,
1132                                         $oldid, $this->getTimestamp(), $bot );
1133                                 Article::onArticleEdit( $this->mTitle );
1134                         }
1135                 }
1136
1137                 if( $wgDBtransactions ) {
1138                         $dbw->query( 'COMMIT', $fname );
1139                 } else {
1140                         ignore_user_abort( $userAbort );
1141                 }
1142
1143                 if ( $good ) {
1144                 if ($watchthis) {
1145                         if (!$this->mTitle->userIsWatching()) $this->watch();
1146                 } else {
1147                         if ( $this->mTitle->userIsWatching() ) {
1148                                 $this->unwatch();
1149                         }
1150                 }
1151                 # standard deferred updates
1152                 $this->editUpdates( $text );
1153
1154
1155                 $urls = array();
1156                 # Template namespace
1157                 # Purge all articles linking here
1158                 if ( $this->mTitle->getNamespace() == NS_TEMPLATE) {
1159                         $titles = $this->mTitle->getLinksTo();
1160                         Title::touchArray( $titles );
1161                         if ( $wgUseSquid ) {
1162                                         foreach ( $titles as $title ) {
1163                                                 $urls[] = $title->getInternalURL();
1164                                         }
1165                         }
1166                 }
1167
1168                 # Squid updates
1169                 if ( $wgUseSquid ) {
1170                         $urls = array_merge( $urls, $this->mTitle->getSquidURLs() );
1171                         $u = new SquidUpdate( $urls );
1172                         $u->doUpdate();
1173                 }
1174
1175                 $this->showArticle( $text, wfMsg( 'updated' ), $sectionanchor );
1176                 }
1177                 return $good;
1178         }
1179
1180         /**
1181          * After we've either updated or inserted the article, update
1182          * the link tables and redirect to the new page.
1183          */
1184         function showArticle( $text, $subtitle , $sectionanchor = '' ) {
1185                 global $wgOut, $wgUser, $wgLinkCache;
1186
1187                 $wgLinkCache = new LinkCache();
1188                 # Select for update
1189                 $wgLinkCache->forUpdate( true );
1190
1191                 # Get old version of link table to allow incremental link updates
1192                 $wgLinkCache->preFill( $this->mTitle );
1193                 $wgLinkCache->clear();
1194
1195                 # Parse the text and replace links with placeholders
1196                 $wgOut = new OutputPage();
1197                 $wgOut->addWikiText( $text );
1198
1199                 # Look up the links in the DB and add them to the link cache
1200                 $wgOut->transformBuffer( RLH_FOR_UPDATE );
1201
1202                 if( $this->isRedirect( $text ) )
1203                         $r = 'redirect=no';
1204                 else
1205                         $r = '';
1206                 $wgOut->redirect( $this->mTitle->getFullURL( $r ).$sectionanchor );
1207         }
1208
1209         /**
1210          * Validate article
1211          * @todo document this function a bit more
1212          */
1213         function validate () {
1214                 global $wgOut, $wgUseValidation;
1215                 if( $wgUseValidation ) {
1216                         require_once ( 'SpecialValidate.php' ) ;
1217                         $wgOut->setPagetitle( wfMsg( 'validate' ) . ': ' . $this->mTitle->getPrefixedText() );
1218                         $wgOut->setRobotpolicy( 'noindex,follow' );
1219                         if( $this->mTitle->getNamespace() != 0 ) {
1220                                 $wgOut->addHTML( wfMsg( 'val_validate_article_namespace_only' ) );
1221                                 return;
1222                         }
1223                         $v = new Validation;
1224                         $v->validate_form( $this->mTitle->getDBkey() );
1225                 } else {
1226                         $wgOut->errorpage( 'nosuchaction', 'nosuchactiontext' );
1227                 }
1228         }
1229
1230         /**
1231          * Mark this particular edit as patrolled
1232          */
1233         function markpatrolled() {
1234                 global $wgOut, $wgRequest, $wgOnlySysopsCanPatrol, $wgUseRCPatrol, $wgUser;
1235                 $wgOut->setRobotpolicy( 'noindex,follow' );
1236
1237                 if ( !$wgUseRCPatrol )
1238                 {
1239                         $wgOut->errorpage( 'rcpatroldisabled', 'rcpatroldisabledtext' );
1240                         return;
1241                 }
1242                 if ( $wgUser->getID() == 0 )
1243                 {
1244                         $wgOut->loginToUse();
1245                         return;
1246                 }
1247                 if ( $wgOnlySysopsCanPatrol && !$wgUser->isSysop() )
1248                 {
1249                         $wgOut->sysopRequired();
1250                         return;
1251                 }
1252                 $rcid = $wgRequest->getVal( 'rcid' );
1253                 if ( !is_null ( $rcid ) )
1254                 {
1255                         RecentChange::markPatrolled( $rcid );
1256                         $wgOut->setPagetitle( wfMsg( 'markedaspatrolled' ) );
1257                         $wgOut->addWikiText( wfMsg( 'markedaspatrolledtext' ) );
1258                         $wgOut->returnToMain( true, $this->mTitle->getPrefixedText() );
1259                 }
1260                 else
1261                 {
1262                         $wgOut->errorpage( 'markedaspatrollederror', 'markedaspatrollederrortext' );
1263                 }
1264         }
1265
1266
1267         /**
1268          * Add or remove this page to my watchlist based on value of $add
1269          */
1270         function watch( $add = true ) {
1271                 global $wgUser, $wgOut, $wgLang;
1272                 global $wgDeferredUpdateList;
1273
1274                 if ( 0 == $wgUser->getID() ) {
1275                         $wgOut->errorpage( 'watchnologin', 'watchnologintext' );
1276                         return;
1277                 }
1278                 if ( wfReadOnly() ) {
1279                         $wgOut->readOnlyPage();
1280                         return;
1281                 }
1282                 if( $add )
1283                         $wgUser->addWatch( $this->mTitle );
1284                 else
1285                         $wgUser->removeWatch( $this->mTitle );
1286
1287                 $wgOut->setPagetitle( wfMsg( $add ? 'addedwatch' : 'removedwatch' ) );
1288                 $wgOut->setRobotpolicy( 'noindex,follow' );
1289
1290                 $sk = $wgUser->getSkin() ;
1291                 $link = $this->mTitle->getPrefixedText();
1292
1293                 if($add)
1294                         $text = wfMsg( 'addedwatchtext', $link );
1295                 else
1296                         $text = wfMsg( 'removedwatchtext', $link );
1297                 $wgOut->addWikiText( $text );
1298
1299                 $up = new UserUpdate();
1300                 array_push( $wgDeferredUpdateList, $up );
1301
1302                 $wgOut->returnToMain( true, $this->mTitle->getPrefixedText() );
1303         }
1304
1305         /**
1306          * Stop watching a page, it act just like a call to watch(false)
1307          */
1308         function unwatch() {
1309                 $this->watch( false );
1310         }
1311
1312         /**
1313          * protect a page
1314          */
1315         function protect( $limit = 'sysop' ) {
1316                 global $wgUser, $wgOut, $wgRequest;
1317
1318                 if ( ! $wgUser->isSysop() ) {
1319                         $wgOut->sysopRequired();
1320                         return;
1321                 }
1322                 if ( wfReadOnly() ) {
1323                         $wgOut->readOnlyPage();
1324                         return;
1325                 }
1326                 $id = $this->mTitle->getArticleID();
1327                 if ( 0 == $id ) {
1328                         $wgOut->fatalError( wfMsg( 'badarticleerror' ) );
1329                         return;
1330                 }
1331
1332                 $confirm = $wgRequest->getBool( 'wpConfirmProtect' ) && $wgRequest->wasPosted();
1333                 $reason = $wgRequest->getText( 'wpReasonProtect' );
1334
1335                 if ( $confirm ) {
1336                         $dbw =& wfGetDB( DB_MASTER );
1337                         $dbw->updateArray( 'cur',
1338                                 array( /* SET */
1339                                         'cur_touched' => $dbw->timestamp(),
1340                                         'cur_restrictions' => (string)$limit
1341                                 ), array( /* WHERE */
1342                                         'cur_id' => $id
1343                                 ), 'Article::protect'
1344                         );
1345
1346                         $log = new LogPage( 'protect' );
1347                         if ( $limit === '' ) {
1348                                         $log->addEntry( 'unprotect', $this->mTitle, $reason );
1349                         } else {
1350                                         $log->addEntry( 'protect', $this->mTitle, $reason );
1351                         }
1352                         $wgOut->redirect( $this->mTitle->getFullURL() );
1353                         return;
1354                 } else {
1355                         $reason = htmlspecialchars( wfMsg( 'protectreason' ) );
1356                         return $this->confirmProtect( '', $reason, $limit );
1357                 }
1358         }
1359
1360         /**
1361          * Output protection confirmation dialog
1362          */
1363         function confirmProtect( $par, $reason, $limit = 'sysop'  ) {
1364                 global $wgOut;
1365
1366                 wfDebug( "Article::confirmProtect\n" );
1367
1368                 $sub = htmlspecialchars( $this->mTitle->getPrefixedText() );
1369                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
1370
1371                 $check = '';
1372                 $protcom = '';
1373
1374                 if ( $limit === '' ) {
1375                         $wgOut->setPageTitle( wfMsg( 'confirmunprotect' ) );
1376                         $wgOut->setSubtitle( wfMsg( 'unprotectsub', $sub ) );
1377                         $wgOut->addWikiText( wfMsg( 'confirmunprotecttext' ) );
1378                         $check = htmlspecialchars( wfMsg( 'confirmunprotect' ) );
1379                         $protcom = htmlspecialchars( wfMsg( 'unprotectcomment' ) );
1380                         $formaction = $this->mTitle->escapeLocalURL( 'action=unprotect' . $par );
1381                 } else {
1382                         $wgOut->setPageTitle( wfMsg( 'confirmprotect' ) );
1383                         $wgOut->setSubtitle( wfMsg( 'protectsub', $sub ) );
1384                         $wgOut->addWikiText( wfMsg( 'confirmprotecttext' ) );
1385                         $check = htmlspecialchars( wfMsg( 'confirmprotect' ) );
1386                         $protcom = htmlspecialchars( wfMsg( 'protectcomment' ) );
1387                         $formaction = $this->mTitle->escapeLocalURL( 'action=protect' . $par );
1388                 }
1389
1390                 $confirm = htmlspecialchars( wfMsg( 'confirm' ) );
1391
1392                 $wgOut->addHTML( "
1393 <form id='protectconfirm' method='post' action=\"{$formaction}\">
1394         <table border='0'>
1395                 <tr>
1396                         <td align='right'>
1397                                 <label for='wpReasonProtect'>{$protcom}:</label>
1398                         </td>
1399                         <td align='left'>
1400                                 <input type='text' size='60' name='wpReasonProtect' id='wpReasonProtect' value=\"" . htmlspecialchars( $reason ) . "\" />
1401                         </td>
1402                 </tr>
1403                 <tr>
1404                         <td>&nbsp;</td>
1405                 </tr>
1406                 <tr>
1407                         <td align='right'>
1408                                 <input type='checkbox' name='wpConfirmProtect' value='1' id='wpConfirmProtect' />
1409                         </td>
1410                         <td>
1411                                 <label for='wpConfirmProtect'>{$check}</label>
1412                         </td>
1413                 </tr>
1414                 <tr>
1415                         <td>&nbsp;</td>
1416                         <td>
1417                                 <input type='submit' name='wpConfirmProtectB' value=\"{$confirm}\" />
1418                         </td>
1419                 </tr>
1420         </table>
1421 </form>\n" );
1422
1423                 $wgOut->returnToMain( false );
1424         }
1425
1426         /**
1427          * Unprotect the pages
1428          */
1429         function unprotect() {
1430                 return $this->protect( '' );
1431         }
1432
1433         /*
1434          * UI entry point for page deletion
1435          */
1436         function delete() {
1437                 global $wgUser, $wgOut, $wgMessageCache, $wgRequest;
1438                 $fname = 'Article::delete';
1439                 $confirm = $wgRequest->getBool( 'wpConfirm' ) && $wgRequest->wasPosted();
1440                 $reason = $wgRequest->getText( 'wpReason' );
1441
1442                 # This code desperately needs to be totally rewritten
1443
1444                 # Check permissions
1445                 if ( ( ! $wgUser->isSysop() ) ) {
1446                         $wgOut->sysopRequired();
1447                         return;
1448                 }
1449                 if ( wfReadOnly() ) {
1450                         $wgOut->readOnlyPage();
1451                         return;
1452                 }
1453
1454                 # Better double-check that it hasn't been deleted yet!
1455                 $wgOut->setPagetitle( wfMsg( 'confirmdelete' ) );
1456                 if ( ( '' == trim( $this->mTitle->getText() ) )
1457                   or ( $this->mTitle->getArticleId() == 0 ) ) {
1458                         $wgOut->fatalError( wfMsg( 'cannotdelete' ) );
1459                         return;
1460                 }
1461
1462                 if ( $confirm ) {
1463                         $this->doDelete( $reason );
1464                         return;
1465                 }
1466
1467                 # determine whether this page has earlier revisions
1468                 # and insert a warning if it does
1469                 # we select the text because it might be useful below
1470                 $dbr =& $this->getDB();
1471                 $ns = $this->mTitle->getNamespace();
1472                 $title = $this->mTitle->getDBkey();
1473                 $old = $dbr->getArray( 'old',
1474                         array( 'old_text', 'old_flags' ),
1475                         array(
1476                                 'old_namespace' => $ns,
1477                                 'old_title' => $title,
1478                         ), $fname, $this->getSelectOptions( array( 'ORDER BY' => 'inverse_timestamp' ) )
1479                 );
1480
1481                 if( $old !== false && !$confirm ) {
1482                         $skin=$wgUser->getSkin();
1483                         $wgOut->addHTML('<b>'.wfMsg('historywarning'));
1484                         $wgOut->addHTML( $skin->historyLink() .'</b>');
1485                 }
1486
1487                 # Fetch cur_text
1488                 $s = $dbr->getArray( 'cur',
1489                         array( 'cur_text' ),
1490                         array(
1491                                 'cur_namespace' => $ns,
1492                                 'cur_title' => $title,
1493                         ), $fname, $this->getSelectOptions()
1494                 );
1495
1496                 if( $s !== false ) {
1497                         # if this is a mini-text, we can paste part of it into the deletion reason
1498
1499                         #if this is empty, an earlier revision may contain "useful" text
1500                         $blanked = false;
1501                         if($s->cur_text != '') {
1502                                 $text=$s->cur_text;
1503                         } else {
1504                                 if($old) {
1505                                         $text = Article::getRevisionText( $old );
1506                                         $blanked = true;
1507                                 }
1508
1509                         }
1510
1511                         $length=strlen($text);
1512
1513                         # this should not happen, since it is not possible to store an empty, new
1514                         # page. Let's insert a standard text in case it does, though
1515                         if($length == 0 && $reason === '') {
1516                                 $reason = wfMsg('exblank');
1517                         }
1518
1519                         if($length < 500 && $reason === '') {
1520
1521                                 # comment field=255, let's grep the first 150 to have some user
1522                                 # space left
1523                                 $text=substr($text,0,150);
1524                                 # let's strip out newlines and HTML tags
1525                                 $text=preg_replace('/\"/',"'",$text);
1526                                 $text=preg_replace('/\</','&lt;',$text);
1527                                 $text=preg_replace('/\>/','&gt;',$text);
1528                                 $text=preg_replace("/[\n\r]/",'',$text);
1529                                 if(!$blanked) {
1530                                         $reason=wfMsg('excontent'). " '".$text;
1531                                 } else {
1532                                         $reason=wfMsg('exbeforeblank') . " '".$text;
1533                                 }
1534                                 if($length>150) { $reason .= '...'; } # we've only pasted part of the text
1535                                 $reason.="'";
1536                         }
1537                 }
1538
1539                 return $this->confirmDelete( '', $reason );
1540         }
1541
1542         /**
1543          * Output deletion confirmation dialog
1544          */
1545         function confirmDelete( $par, $reason ) {
1546                 global $wgOut;
1547
1548                 wfDebug( "Article::confirmDelete\n" );
1549
1550                 $sub = htmlspecialchars( $this->mTitle->getPrefixedText() );
1551                 $wgOut->setSubtitle( wfMsg( 'deletesub', $sub ) );
1552                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
1553                 $wgOut->addWikiText( wfMsg( 'confirmdeletetext' ) );
1554
1555                 $formaction = $this->mTitle->escapeLocalURL( 'action=delete' . $par );
1556
1557                 $confirm = htmlspecialchars( wfMsg( 'confirm' ) );
1558                 $check = htmlspecialchars( wfMsg( 'confirmcheck' ) );
1559                 $delcom = htmlspecialchars( wfMsg( 'deletecomment' ) );
1560
1561                 $wgOut->addHTML( "
1562 <form id='deleteconfirm' method='post' action=\"{$formaction}\">
1563         <table border='0'>
1564                 <tr>
1565                         <td align='right'>
1566                                 <label for='wpReason'>{$delcom}:</label>
1567                         </td>
1568                         <td align='left'>
1569                                 <input type='text' size='60' name='wpReason' id='wpReason' value=\"" . htmlspecialchars( $reason ) . "\" />
1570                         </td>
1571                 </tr>
1572                 <tr>
1573                         <td>&nbsp;</td>
1574                 </tr>
1575                 <tr>
1576                         <td align='right'>
1577                                 <input type='checkbox' name='wpConfirm' value='1' id='wpConfirm' />
1578                         </td>
1579                         <td>
1580                                 <label for='wpConfirm'>{$check}</label>
1581                         </td>
1582                 </tr>
1583                 <tr>
1584                         <td>&nbsp;</td>
1585                         <td>
1586                                 <input type='submit' name='wpConfirmB' value=\"{$confirm}\" />
1587                         </td>
1588                 </tr>
1589         </table>
1590 </form>\n" );
1591
1592                 $wgOut->returnToMain( false );
1593         }
1594
1595
1596         /**
1597          * Perform a deletion and output success or failure messages
1598          */
1599         function doDelete( $reason ) {
1600                 global $wgOut, $wgUser, $wgLang;
1601                 $fname = 'Article::doDelete';
1602                 wfDebug( $fname."\n" );
1603
1604                 if ( $this->doDeleteArticle( $reason ) ) {
1605                         $deleted = $this->mTitle->getPrefixedText();
1606
1607                         $wgOut->setPagetitle( wfMsg( 'actioncomplete' ) );
1608                         $wgOut->setRobotpolicy( 'noindex,nofollow' );
1609
1610                         $sk = $wgUser->getSkin();
1611                         $loglink = $sk->makeKnownLink( $wgLang->getNsText( NS_PROJECT ) .
1612                           ':' . wfMsg( 'dellogpage' ), wfMsg( 'deletionlog' ) );
1613
1614                         $text = wfMsg( 'deletedtext', $deleted, $loglink );
1615
1616                         $wgOut->addHTML( '<p>' . $text . "</p>\n" );
1617                         $wgOut->returnToMain( false );
1618                 } else {
1619                         $wgOut->fatalError( wfMsg( 'cannotdelete' ) );
1620                 }
1621         }
1622
1623         /**
1624          * Back-end article deletion
1625          * Deletes the article with database consistency, writes logs, purges caches
1626          * Returns success
1627          */
1628         function doDeleteArticle( $reason ) {
1629                 global $wgUser, $wgLang;
1630                 global  $wgUseSquid, $wgDeferredUpdateList, $wgInternalServer;
1631
1632                 $fname = 'Article::doDeleteArticle';
1633                 wfDebug( $fname."\n" );
1634
1635                 $dbw =& wfGetDB( DB_MASTER );
1636                 $ns = $this->mTitle->getNamespace();
1637                 $t = $this->mTitle->getDBkey();
1638                 $id = $this->mTitle->getArticleID();
1639
1640                 if ( $t == '' || $id == 0 ) {
1641                         return false;
1642                 }
1643
1644                 $u = new SiteStatsUpdate( 0, 1, -$this->isCountable( $this->getContent( true ) ) );
1645                 array_push( $wgDeferredUpdateList, $u );
1646
1647                 $linksTo = $this->mTitle->getLinksTo();
1648
1649                 # Squid purging
1650                 if ( $wgUseSquid ) {
1651                         $urls = array(
1652                                 $this->mTitle->getInternalURL(),
1653                                 $this->mTitle->getInternalURL( 'history' )
1654                         );
1655                         foreach ( $linksTo as $linkTo ) {
1656                                 $urls[] = $linkTo->getInternalURL();
1657                         }
1658
1659                         $u = new SquidUpdate( $urls );
1660                         array_push( $wgDeferredUpdateList, $u );
1661
1662                 }
1663
1664                 # Client and file cache invalidation
1665                 Title::touchArray( $linksTo );
1666
1667                 # Move article and history to the "archive" table
1668                 $archiveTable = $dbw->tableName( 'archive' );
1669                 $oldTable = $dbw->tableName( 'old' );
1670                 $curTable = $dbw->tableName( 'cur' );
1671                 $recentchangesTable = $dbw->tableName( 'recentchanges' );
1672                 $linksTable = $dbw->tableName( 'links' );
1673                 $brokenlinksTable = $dbw->tableName( 'brokenlinks' );
1674
1675                 $dbw->insertSelect( 'archive', 'cur',
1676                         array(
1677                                 'ar_namespace' => 'cur_namespace',
1678                                 'ar_title' => 'cur_title',
1679                                 'ar_text' => 'cur_text',
1680                                 'ar_comment' => 'cur_comment',
1681                                 'ar_user' => 'cur_user',
1682                                 'ar_user_text' => 'cur_user_text',
1683                                 'ar_timestamp' => 'cur_timestamp',
1684                                 'ar_minor_edit' => 'cur_minor_edit',
1685                                 'ar_flags' => 0,
1686                         ), array(
1687                                 'cur_namespace' => $ns,
1688                                 'cur_title' => $t,
1689                         ), $fname
1690                 );
1691
1692                 $dbw->insertSelect( 'archive', 'old',
1693                         array(
1694                                 'ar_namespace' => 'old_namespace',
1695                                 'ar_title' => 'old_title',
1696                                 'ar_text' => 'old_text',
1697                                 'ar_comment' => 'old_comment',
1698                                 'ar_user' => 'old_user',
1699                                 'ar_user_text' => 'old_user_text',
1700                                 'ar_timestamp' => 'old_timestamp',
1701                                 'ar_minor_edit' => 'old_minor_edit',
1702                                 'ar_flags' => 'old_flags'
1703                         ), array(
1704                                 'old_namespace' => $ns,
1705                                 'old_title' => $t,
1706                         ), $fname
1707                 );
1708
1709                 # Now that it's safely backed up, delete it
1710
1711                 $dbw->delete( 'cur', array( 'cur_namespace' => $ns, 'cur_title' => $t ), $fname );
1712                 $dbw->delete( 'old', array( 'old_namespace' => $ns, 'old_title' => $t ), $fname );
1713                 $dbw->delete( 'recentchanges', array( 'rc_namespace' => $ns, 'rc_title' => $t ), $fname );
1714
1715                 # Finally, clean up the link tables
1716                 $t = $this->mTitle->getPrefixedDBkey();
1717
1718                 Article::onArticleDelete( $this->mTitle );
1719
1720                 # Insert broken links
1721                 $brokenLinks = array();
1722                 foreach ( $linksTo as $titleObj ) {
1723                         # Get article ID. Efficient because it was loaded into the cache by getLinksTo().
1724                         $linkID = $titleObj->getArticleID();
1725                         $brokenLinks[] = array( 'bl_from' => $linkID, 'bl_to' => $t );
1726                 }
1727                 $dbw->insertArray( 'brokenlinks', $brokenLinks, $fname, 'IGNORE' );
1728
1729                 # Delete live links
1730                 $dbw->delete( 'links', array( 'l_to' => $id ) );
1731                 $dbw->delete( 'links', array( 'l_from' => $id ) );
1732                 $dbw->delete( 'imagelinks', array( 'il_from' => $id ) );
1733                 $dbw->delete( 'brokenlinks', array( 'bl_from' => $id ) );
1734                 $dbw->delete( 'categorylinks', array( 'cl_from' => $id ) );
1735
1736                 # Log the deletion
1737                 $log = new LogPage( 'delete' );
1738                 $log->addEntry( 'delete', $this->mTitle, $reason );
1739
1740                 # Clear the cached article id so the interface doesn't act like we exist
1741                 $this->mTitle->resetArticleID( 0 );
1742                 $this->mTitle->mArticleID = 0;
1743                 return true;
1744         }
1745
1746         /**
1747          * Revert a modification
1748          */
1749         function rollback() {
1750                 global $wgUser, $wgLang, $wgOut, $wgRequest;
1751                 $fname = 'Article::rollback';
1752
1753                 if ( ! $wgUser->isSysop() ) {
1754                         $wgOut->sysopRequired();
1755                         return;
1756                 }
1757                 if ( wfReadOnly() ) {
1758                         $wgOut->readOnlyPage( $this->getContent( true ) );
1759                         return;
1760                 }
1761                 $dbw =& wfGetDB( DB_MASTER );
1762
1763                 # Enhanced rollback, marks edits rc_bot=1
1764                 $bot = $wgRequest->getBool( 'bot' );
1765
1766                 # Replace all this user's current edits with the next one down
1767                 $tt = $this->mTitle->getDBKey();
1768                 $n = $this->mTitle->getNamespace();
1769
1770                 # Get the last editor, lock table exclusively
1771                 $s = $dbw->getArray( 'cur',
1772                         array( 'cur_id','cur_user','cur_user_text','cur_comment' ),
1773                         array( 'cur_title' => $tt, 'cur_namespace' => $n ),
1774                         $fname, 'FOR UPDATE'
1775                 );
1776                 if( $s === false ) {
1777                         # Something wrong
1778                         $wgOut->addHTML( wfMsg( 'notanarticle' ) );
1779                         return;
1780                 }
1781                 $ut = $dbw->strencode( $s->cur_user_text );
1782                 $uid = $s->cur_user;
1783                 $pid = $s->cur_id;
1784
1785                 $from = str_replace( '_', ' ', $wgRequest->getVal( 'from' ) );
1786                 if( $from != $s->cur_user_text ) {
1787                         $wgOut->setPageTitle(wfmsg('rollbackfailed'));
1788                         $wgOut->addWikiText( wfMsg( 'alreadyrolled',
1789                                 htmlspecialchars( $this->mTitle->getPrefixedText()),
1790                                 htmlspecialchars( $from ),
1791                                 htmlspecialchars( $s->cur_user_text ) ) );
1792                         if($s->cur_comment != '') {
1793                                 $wgOut->addHTML(
1794                                         wfMsg('editcomment',
1795                                         htmlspecialchars( $s->cur_comment ) ) );
1796                         }
1797                         return;
1798                 }
1799
1800                 # Get the last edit not by this guy
1801                 $s = $dbw->getArray( 'old',
1802                         array( 'old_text','old_user','old_user_text','old_timestamp','old_flags' ),
1803                         array(
1804                                 'old_namespace' => $n,
1805                                 'old_title' => $tt,
1806                                 "old_user <> {$uid} OR old_user_text <> '{$ut}'"
1807                         ), $fname, array( 'FOR UPDATE', 'USE INDEX' => 'name_title_timestamp' )
1808                 );
1809                 if( $s === false ) {
1810                         # Something wrong
1811                         $wgOut->setPageTitle(wfMsg('rollbackfailed'));
1812                         $wgOut->addHTML( wfMsg( 'cantrollback' ) );
1813                         return;
1814                 }
1815
1816                 if ( $bot ) {
1817                         # Mark all reverted edits as bot
1818                         $dbw->updateArray( 'recentchanges',
1819                                 array( /* SET */
1820                                         'rc_bot' => 1
1821                                 ), array( /* WHERE */
1822                                         'rc_user' => $uid,
1823                                         "rc_timestamp > '{$s->old_timestamp}'",
1824                                 ), $fname
1825                         );
1826                 }
1827
1828                 # Save it!
1829                 $newcomment = wfMsg( 'revertpage', $s->old_user_text, $from );
1830                 $wgOut->setPagetitle( wfMsg( 'actioncomplete' ) );
1831                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
1832                 $wgOut->addHTML( '<h2>' . $newcomment . "</h2>\n<hr />\n" );
1833                 $this->updateArticle( Article::getRevisionText( $s ), $newcomment, 1, $this->mTitle->userIsWatching(), $bot );
1834                 Article::onArticleEdit( $this->mTitle );
1835                 $wgOut->returnToMain( false );
1836         }
1837
1838
1839         /**
1840          * Do standard deferred updates after page view
1841          * @private
1842          */
1843         function viewUpdates() {
1844                 global $wgDeferredUpdateList;
1845                 if ( 0 != $this->getID() ) {
1846                         global $wgDisableCounters;
1847                         if( !$wgDisableCounters ) {
1848                                 Article::incViewCount( $this->getID() );
1849                                 $u = new SiteStatsUpdate( 1, 0, 0 );
1850                                 array_push( $wgDeferredUpdateList, $u );
1851                         }
1852                 }
1853                 $u = new UserTalkUpdate( 0, $this->mTitle->getNamespace(),
1854                   $this->mTitle->getDBkey() );
1855                 array_push( $wgDeferredUpdateList, $u );
1856         }
1857
1858         /**
1859          * Do standard deferred updates after page edit.
1860          * Every 1000th edit, prune the recent changes table.
1861          * @private
1862          * @param string $text
1863          */
1864         function editUpdates( $text ) {
1865                 global $wgDeferredUpdateList, $wgDBname, $wgMemc;
1866                 global $wgMessageCache;
1867
1868                 wfSeedRandom();
1869                 if ( 0 == mt_rand( 0, 999 ) ) {
1870                         $dbw =& wfGetDB( DB_MASTER );
1871                         $cutoff = $dbw->timestamp( time() - ( 7 * 86400 ) );
1872                         $sql = "DELETE FROM recentchanges WHERE rc_timestamp < '{$cutoff}'";
1873                         $dbw->query( $sql );
1874                 }
1875                 $id = $this->getID();
1876                 $title = $this->mTitle->getPrefixedDBkey();
1877                 $shortTitle = $this->mTitle->getDBkey();
1878
1879                 $adj = $this->mCountAdjustment;
1880
1881                 if ( 0 != $id ) {
1882                         $u = new LinksUpdate( $id, $title );
1883                         array_push( $wgDeferredUpdateList, $u );
1884                         $u = new SiteStatsUpdate( 0, 1, $adj );
1885                         array_push( $wgDeferredUpdateList, $u );
1886                         $u = new SearchUpdate( $id, $title, $text );
1887                         array_push( $wgDeferredUpdateList, $u );
1888
1889                         $u = new UserTalkUpdate( 1, $this->mTitle->getNamespace(), $shortTitle );
1890                         array_push( $wgDeferredUpdateList, $u );
1891
1892                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
1893                                 $wgMessageCache->replace( $shortTitle, $text );
1894                         }
1895                 }
1896         }
1897
1898         /**
1899          * @todo document this function
1900          * @private
1901          */
1902         function setOldSubtitle() {
1903                 global $wgLang, $wgOut, $wgUser;
1904
1905                 $td = $wgLang->timeanddate( $this->mTimestamp, true );
1906                 $sk = $wgUser->getSkin();
1907                 $lnk = $sk->makeKnownLinkObj ( $this->mTitle, wfMsg( 'currentrevisionlink' ) );
1908                 $r = wfMsg( 'revisionasofwithlink', $td, $lnk );
1909                 $wgOut->setSubtitle( $r );
1910         }
1911
1912         /**
1913          * This function is called right before saving the wikitext,
1914          * so we can do things like signatures and links-in-context.
1915          *
1916          * @param string $text
1917          */
1918         function preSaveTransform( $text ) {
1919                 global $wgParser, $wgUser;
1920                 return $wgParser->preSaveTransform( $text, $this->mTitle, $wgUser, ParserOptions::newFromUser( $wgUser ) );
1921         }
1922
1923         /* Caching functions */
1924
1925         /**
1926          * checkLastModified returns true if it has taken care of all
1927          * output to the client that is necessary for this request.
1928          * (that is, it has sent a cached version of the page)
1929          */
1930         function tryFileCache() {
1931                 static $called = false;
1932                 if( $called ) {
1933                         wfDebug( " tryFileCache() -- called twice!?\n" );
1934                         return;
1935                 }
1936                 $called = true;
1937                 if($this->isFileCacheable()) {
1938                         $touched = $this->mTouched;
1939                         if( $this->mTitle->getPrefixedDBkey() == wfMsg( 'mainpage' ) ) {
1940                                 # Expire the main page quicker
1941                                 $expire = wfUnix2Timestamp( time() - 3600 );
1942                                 $touched = max( $expire, $touched );
1943                         }
1944                         $cache = new CacheManager( $this->mTitle );
1945                         if($cache->isFileCacheGood( $touched )) {
1946                                 global $wgOut;
1947                                 wfDebug( " tryFileCache() - about to load\n" );
1948                                 $cache->loadFromFileCache();
1949                                 return true;
1950                         } else {
1951                                 wfDebug( " tryFileCache() - starting buffer\n" );
1952                                 ob_start( array(&$cache, 'saveToFileCache' ) );
1953                         }
1954                 } else {
1955                         wfDebug( " tryFileCache() - not cacheable\n" );
1956                 }
1957         }
1958
1959         /**
1960          * Check if the page can be cached
1961          * @return bool
1962          */
1963         function isFileCacheable() {
1964                 global $wgUser, $wgUseFileCache, $wgShowIPinHeader, $wgRequest;
1965                 extract( $wgRequest->getValues( 'action', 'oldid', 'diff', 'redirect', 'printable' ) );
1966
1967                 return $wgUseFileCache
1968                         and (!$wgShowIPinHeader)
1969                         and ($this->getID() != 0)
1970                         and ($wgUser->getId() == 0)
1971                         and (!$wgUser->getNewtalk())
1972                         and ($this->mTitle->getNamespace() != NS_SPECIAL )
1973                         and (empty( $action ) || $action == 'view')
1974                         and (!isset($oldid))
1975                         and (!isset($diff))
1976                         and (!isset($redirect))
1977                         and (!isset($printable))
1978                         and (!$this->mRedirectedFrom);
1979         }
1980
1981         /**
1982          * Loads cur_touched and returns a value indicating if it should be used
1983          *
1984          */
1985         function checkTouched() {
1986                 $fname = 'Article::checkTouched';
1987                 $id = $this->getID();
1988                 $dbr =& $this->getDB();
1989                 $s = $dbr->getArray( 'cur', array( 'cur_touched', 'cur_is_redirect' ),
1990                         array( 'cur_id' => $id ), $fname, $this->getSelectOptions() );
1991                 if( $s !== false ) {
1992                         $this->mTouched = wfTimestamp(TS_MW,$s->cur_touched);
1993                         return !$s->cur_is_redirect;
1994                 } else {
1995                         return false;
1996                 }
1997         }
1998
1999         /**
2000          * Edit an article without doing all that other stuff
2001          *
2002          * @param string $text text submitted
2003          * @param string $comment comment submitted
2004          * @param integer $minor whereas it's a minor modification
2005          */
2006         function quickEdit( $text, $comment = '', $minor = 0 ) {
2007                 global $wgUser;
2008                 $fname = 'Article::quickEdit';
2009                 wfProfileIn( $fname );
2010
2011                 $dbw =& wfGetDB( DB_MASTER );
2012                 $ns = $this->mTitle->getNamespace();
2013                 $dbkey = $this->mTitle->getDBkey();
2014                 $encDbKey = $dbw->strencode( $dbkey );
2015                 $timestamp = wfTimestampNow();
2016
2017                 # Save to history
2018                 $dbw->insertSelect( 'old', 'cur',
2019                         array(
2020                                 'old_namespace' => 'cur_namespace',
2021                                 'old_title' => 'cur_title',
2022                                 'old_text' => 'cur_text',
2023                                 'old_comment' => 'cur_comment',
2024                                 'old_user' => 'cur_user',
2025                                 'old_user_text' => 'cur_user_text',
2026                                 'old_timestamp' => 'cur_timestamp',
2027                                 'inverse_timestamp' => '99999999999999-cur_timestamp',
2028                         ), array(
2029                                 'cur_namespace' => $ns,
2030                                 'cur_title' => $dbkey,
2031                         ), $fname
2032                 );
2033
2034                 # Use the affected row count to determine if the article is new
2035                 $numRows = $dbw->affectedRows();
2036
2037                 # Make an array of fields to be inserted
2038                 $fields = array(
2039                         'cur_text' => $text,
2040                         'cur_timestamp' => $timestamp,
2041                         'cur_user' => $wgUser->getID(),
2042                         'cur_user_text' => $wgUser->getName(),
2043                         'inverse_timestamp' => wfInvertTimestamp( $timestamp ),
2044                         'cur_comment' => $comment,
2045                         'cur_is_redirect' => $this->isRedirect( $text ) ? 1 : 0,
2046                         'cur_minor_edit' => intval($minor),
2047                         'cur_touched' => $dbw->timestamp($timestamp),
2048                 );
2049
2050                 if ( $numRows ) {
2051                         # Update article
2052                         $fields['cur_is_new'] = 0;
2053                         $dbw->updateArray( 'cur', $fields, array( 'cur_namespace' => $ns, 'cur_title' => $dbkey ), $fname );
2054                 } else {
2055                         # Insert new article
2056                         $fields['cur_is_new'] = 1;
2057                         $fields['cur_namespace'] = $ns;
2058                         $fields['cur_title'] = $dbkey;
2059                         $fields['cur_random'] = $rand = number_format( mt_rand() / mt_getrandmax(), 12, '.', '' );
2060                         $dbw->insertArray( 'cur', $fields, $fname );
2061                 }
2062                 wfProfileOut( $fname );
2063         }
2064
2065         /**
2066          * Used to increment the view counter
2067          *
2068          * @static
2069          * @param integer $id article id
2070          */
2071         function incViewCount( $id ) {
2072                 $id = intval( $id );
2073                 global $wgHitcounterUpdateFreq;
2074
2075                 $dbw =& wfGetDB( DB_MASTER );
2076                 $curTable = $dbw->tableName( 'cur' );
2077                 $hitcounterTable = $dbw->tableName( 'hitcounter' );
2078                 $acchitsTable = $dbw->tableName( 'acchits' );
2079
2080                 if( $wgHitcounterUpdateFreq <= 1 ){ //
2081                         $dbw->query( "UPDATE $curTable SET cur_counter = cur_counter + 1 WHERE cur_id = $id" );
2082                         return;
2083                 }
2084
2085                 # Not important enough to warrant an error page in case of failure
2086                 $oldignore = $dbw->ignoreErrors( true );
2087
2088                 $dbw->query( "INSERT INTO $hitcounterTable (hc_id) VALUES ({$id})" );
2089
2090                 $checkfreq = intval( $wgHitcounterUpdateFreq/25 + 1 );
2091                 if( (rand() % $checkfreq != 0) or ($dbw->lastErrno() != 0) ){
2092                         # Most of the time (or on SQL errors), skip row count check
2093                         $dbw->ignoreErrors( $oldignore );
2094                         return;
2095                 }
2096
2097                 $res = $dbw->query("SELECT COUNT(*) as n FROM $hitcounterTable");
2098                 $row = $dbw->fetchObject( $res );
2099                 $rown = intval( $row->n );
2100                 if( $rown >= $wgHitcounterUpdateFreq ){
2101                         wfProfileIn( 'Article::incViewCount-collect' );
2102                         $old_user_abort = ignore_user_abort( true );
2103
2104                         $dbw->query("LOCK TABLES $hitcounterTable WRITE");
2105                         $dbw->query("CREATE TEMPORARY TABLE $acchitsTable TYPE=HEAP ".
2106                                 "SELECT hc_id,COUNT(*) AS hc_n FROM $hitcounterTable ".
2107                                 'GROUP BY hc_id');
2108                         $dbw->query("DELETE FROM $hitcounterTable");
2109                         $dbw->query('UNLOCK TABLES');
2110                         $dbw->query("UPDATE $curTable,$acchitsTable SET cur_counter=cur_counter + hc_n ".
2111                                 'WHERE cur_id = hc_id');
2112                         $dbw->query("DROP TABLE $acchitsTable");
2113
2114                         ignore_user_abort( $old_user_abort );
2115                         wfProfileOut( 'Article::incViewCount-collect' );
2116                 }
2117                 $dbw->ignoreErrors( $oldignore );
2118         }
2119
2120         /**#@+
2121          * The onArticle*() functions are supposed to be a kind of hooks
2122          * which should be called whenever any of the specified actions
2123          * are done.
2124          *
2125          * This is a good place to put code to clear caches, for instance.
2126          *
2127          * This is called on page move and undelete, as well as edit
2128          * @static
2129          * @param $title_obj a title object
2130          */
2131
2132         function onArticleCreate($title_obj) {
2133                 global $wgUseSquid, $wgDeferredUpdateList;
2134
2135                 $titles = $title_obj->getBrokenLinksTo();
2136
2137                 # Purge squid
2138                 if ( $wgUseSquid ) {
2139                         $urls = $title_obj->getSquidURLs();
2140                         foreach ( $titles as $linkTitle ) {
2141                                 $urls[] = $linkTitle->getInternalURL();
2142                         }
2143                         $u = new SquidUpdate( $urls );
2144                         array_push( $wgDeferredUpdateList, $u );
2145                 }
2146
2147                 # Clear persistent link cache
2148                 LinkCache::linksccClearBrokenLinksTo( $title_obj->getPrefixedDBkey() );
2149         }
2150
2151         function onArticleDelete($title_obj) {
2152                 LinkCache::linksccClearLinksTo( $title_obj->getArticleID() );
2153         }
2154         function onArticleEdit($title_obj) {
2155                 LinkCache::linksccClearPage( $title_obj->getArticleID() );
2156         }
2157         /**#@-*/
2158
2159         /**
2160          * Info about this page
2161          */
2162         function info() {
2163                 global $wgUser, $wgTitle, $wgOut, $wgLang, $wgAllowPageInfo;
2164                 $fname = 'Article::info';
2165
2166                 if ( !$wgAllowPageInfo ) {
2167                         $wgOut->errorpage( 'nosuchaction', 'nosuchactiontext' );
2168                         return;
2169                 }
2170
2171                 $dbr =& $this->getDB();
2172
2173                 $basenamespace = $wgTitle->getNamespace() & (~1);
2174                 $cur_clause = array( 'cur_title' => $wgTitle->getDBkey(), 'cur_namespace' => $basenamespace );
2175                 $old_clause = array( 'old_title' => $wgTitle->getDBkey(), 'old_namespace' => $basenamespace );
2176                 $wl_clause  = array( 'wl_title' => $wgTitle->getDBkey(), 'wl_namespace' => $basenamespace );
2177                 $fullTitle = $wgTitle->makeName($basenamespace, $wgTitle->getDBKey());
2178                 $wgOut->setPagetitle(  $fullTitle );
2179                 $wgOut->setSubtitle( wfMsg( 'infosubtitle' ));
2180
2181                 # first, see if the page exists at all.
2182                 $exists = $dbr->selectField( 'cur', 'COUNT(*)', $cur_clause, $fname, $this->getSelectOptions() );
2183                 if ($exists < 1) {
2184                         $wgOut->addHTML( wfMsg('noarticletext') );
2185                 } else {
2186                         $numwatchers = $dbr->selectField( 'watchlist', 'COUNT(*)', $wl_clause, $fname,
2187                                 $this->getSelectOptions() );
2188                         $wgOut->addHTML( "<ul><li>" . wfMsg("numwatchers", $numwatchers) . '</li>' );
2189                         $old = $dbr->selectField( 'old', 'COUNT(*)', $old_clause, $fname, $this->getSelectOptions() );
2190                         $wgOut->addHTML( "<li>" . wfMsg('numedits', $old + 1) . '</li>');
2191
2192                         # to find number of distinct authors, we need to do some
2193                         # funny stuff because of the cur/old table split:
2194                         # - first, find the name of the 'cur' author
2195                         # - then, find the number of *other* authors in 'old'
2196
2197                         # find 'cur' author
2198                         $cur_author = $dbr->selectField( 'cur', 'cur_user_text', $cur_clause, $fname,
2199                                 $this->getSelectOptions() );
2200
2201                         # find number of 'old' authors excluding 'cur' author
2202                         $authors = $dbr->selectField( 'old', 'COUNT(DISTINCT old_user_text)',
2203                                 $old_clause + array( 'old_user_text<>' . $dbr->addQuotes( $cur_author ) ), $fname,
2204                                 $this->getSelectOptions() ) + 1;
2205
2206                         # now for the Talk page ...
2207                         $cur_clause = array( 'cur_title' => $wgTitle->getDBkey(), 'cur_namespace' => $basenamespace+1 );
2208                         $old_clause = array( 'old_title' => $wgTitle->getDBkey(), 'old_namespace' => $basenamespace+1 );
2209
2210                         # does it exist?
2211                         $exists = $dbr->selectField( 'cur', 'COUNT(*)', $cur_clause, $fname, $this->getSelectOptions() );
2212
2213                         # number of edits
2214                         if ($exists > 0) {
2215                                 $old = $dbr->selectField( 'old', 'COUNT(*)', $old_clause, $fname, $this->getSelectOptions() );
2216                                 $wgOut->addHTML( '<li>' . wfMsg("numtalkedits", $old + 1) . '</li>');
2217                         }
2218                         $wgOut->addHTML( '<li>' . wfMsg("numauthors", $authors) . '</li>' );
2219
2220                         # number of authors
2221                         if ($exists > 0) {
2222                                 $cur_author = $dbr->selectField( 'cur', 'cur_user_text', $cur_clause, $fname,
2223                                         $this->getSelectOptions() );
2224                                 $authors = $dbr->selectField( 'cur', 'COUNT(DISTINCT old_user_text)',
2225                                         $old_clause + array( 'old_user_text<>' . $dbr->addQuotes( $cur_author ) ),
2226                                         $fname, $this->getSelectOptions() );
2227
2228                                 $wgOut->addHTML( '<li>' . wfMsg('numtalkauthors', $authors) . '</li></ul>' );
2229                         }
2230                 }
2231         }
2232 }
2233
2234 ?>