includes/Article.php

   1 <?php
   2 /**
   3  * File for articles
   4  * @package MediaWiki
   5  */
   6
   7 /**
   8  * Need the CacheManager to be loaded
   9  */
  10 require_once ( 'CacheManager.php' );
  11
  12 $wgArticleCurContentFields = false;
  13 $wgArticleOldContentFields = false;
  14
  15 /**
  16  * Class representing a Wikipedia article and history.
  17  *
  18  * See design.doc for an overview.
  19  * Note: edit user interface and cache support functions have been
  20  * moved to separate EditPage and CacheManager classes.
  21  *
  22  * @package MediaWiki
  23  */
  24 class Article {
  25         /**#@+
  26          * @access private
  27          */
  28         var $mContent, $mContentLoaded;
  29         var $mUser, $mTimestamp, $mUserText;
  30         var $mCounter, $mComment, $mCountAdjustment;
  31         var $mMinorEdit, $mRedirectedFrom;
  32         var $mTouched, $mFileCache, $mTitle;
  33         var $mId, $mTable;
  34         var $mForUpdate;
  35         var $mOldId;
  36         /**#@-*/
  37
  38         /**
  39          * Constructor and clear the article
  40          * @param mixed &$title
  41          */
  42         function Article( &$title ) {
  43                 $this->mTitle =& $title;
  44                 $this->clear();
  45         }
  46
  47         /**
  48           * Clear the object
  49           * @private
  50           */
  51         function clear() {
  52                 $this->mContentLoaded = false;
  53                 $this->mCurID = $this->mUser = $this->mCounter = -1; # Not loaded
  54                 $this->mRedirectedFrom = $this->mUserText =
  55                 $this->mTimestamp = $this->mComment = $this->mFileCache = '';
  56                 $this->mCountAdjustment = 0;
  57                 $this->mTouched = '19700101000000';
  58                 $this->mForUpdate = false;
  59         }
  60
  61         /**
  62           * Get revision text associated with an old or archive row
  63           * $row is usually an object from wfFetchRow(), both the flags and the text
  64           * field must be included
  65           * @static
  66           * @param integer $row Id of a row
  67           * @param string $prefix table prefix (default 'old_')
  68           * @return string $text|false the text requested
  69         */
  70         function getRevisionText( $row, $prefix = 'old_' ) {
  71                 $fname = 'Article::getRevisionText';
  72                 wfProfileIn( $fname );
  73
  74                 # Get data
  75                 $textField = $prefix . 'text';
  76                 $flagsField = $prefix . 'flags';
  77
  78                 if( isset( $row->$flagsField ) ) {
  79                         $flags = explode( ',', $row->$flagsField );
  80                 } else {
  81                         $flags = array();
  82                 }
  83
  84                 if( isset( $row->$textField ) ) {
  85                         $text = $row->$textField;
  86                 } else {
  87                         wfProfileOut( $fname );
  88                         return false;
  89                 }
  90
  91                 if( in_array( 'gzip', $flags ) ) {
  92                         # Deal with optional compression of archived pages.
  93                         # This can be done periodically via maintenance/compressOld.php, and
  94                         # as pages are saved if $wgCompressRevisions is set.
  95                         $text = gzinflate( $text );
  96                 }
  97
  98                 if( in_array( 'object', $flags ) ) {
  99                         # Generic compressed storage
 100                         $obj = unserialize( $text );
 101
 102                         # Bugger, corrupted my test database by double-serializing
 103                         if ( !is_object( $obj ) ) {
 104                                 $obj = unserialize( $obj );
 105                         }
 106
 107                         $text = $obj->getText();
 108                 }
 109
 110                 global $wgLegacyEncoding;
 111                 if( $wgLegacyEncoding && !in_array( 'utf-8', $flags ) ) {
 112                         # Old revisions kept around in a legacy encoding?
 113                         # Upconvert on demand.
 114                         global $wgInputEncoding, $wgContLang;
 115                         $text = $wgContLang->iconv( $wgLegacyEncoding, $wgInputEncoding, $text );
 116                 }
 117                 wfProfileOut( $fname );
 118                 return $text;
 119         }
 120
 121         /**
 122          * If $wgCompressRevisions is enabled, we will compress data.
 123          * The input string is modified in place.
 124          * Return value is the flags field: contains 'gzip' if the
 125          * data is compressed, and 'utf-8' if we're saving in UTF-8
 126          * mode.
 127          *
 128          * @static
 129          * @param mixed $text reference to a text
 130          * @return string
 131          */
 132         function compressRevisionText( &$text ) {
 133                 global $wgCompressRevisions, $wgUseLatin1;
 134                 $flags = array();
 135                 if( !$wgUseLatin1 ) {
 136                         # Revisions not marked this way will be converted
 137                         # on load if $wgLegacyCharset is set in the future.
 138                         $flags[] = 'utf-8';
 139                 }
 140                 if( $wgCompressRevisions ) {
 141                         if( function_exists( 'gzdeflate' ) ) {
 142                                 $text = gzdeflate( $text );
 143                                 $flags[] = 'gzip';
 144                         } else {
 145                                 wfDebug( "Article::compressRevisionText() -- no zlib support, not compressing\n" );
 146                         }
 147                 }
 148                 return implode( ',', $flags );
 149         }
 150
 151         /**
 152          * Note that getContent/loadContent may follow redirects if
 153          * not told otherwise, and so may cause a change to mTitle.
 154          *
 155          * @param $noredir
 156          * @return Return the text of this revision
 157         */
 158         function getContent( $noredir ) {
 159                 global $wgRequest;
 160
 161                 # Get variables from query string :P
 162                 $action = $wgRequest->getText( 'action', 'view' );
 163                 $section = $wgRequest->getText( 'section' );
 164
 165                 $fname =  'Article::getContent';
 166                 wfProfileIn( $fname );
 167
 168                 if ( 0 == $this->getID() ) {
 169                         if ( 'edit' == $action ) {
 170                                 wfProfileOut( $fname );
 171                                 return ''; # was "newarticletext", now moved above the box)
 172                         }
 173                         wfProfileOut( $fname );
 174                         return wfMsg( 'noarticletext' );
 175                 } else {
 176                         $this->loadContent( $noredir );
 177                         # check if we're displaying a [[User talk:x.x.x.x]] anonymous talk page
 178                         if ( $this->mTitle->getNamespace() == NS_USER_TALK &&
 179                           preg_match('/^\d{1,3}\.\d{1,3}.\d{1,3}\.\d{1,3}$/',$this->mTitle->getText()) &&
 180                           $action=='view'
 181                         ) {
 182                                 wfProfileOut( $fname );
 183                                 return $this->mContent . "\n" .wfMsg('anontalkpagetext');
 184                         } else {
 185                                 if($action=='edit') {
 186                                         if($section!='') {
 187                                                 if($section=='new') {
 188                                                         wfProfileOut( $fname );
 189                                                         return '';
 190                                                 }
 191
 192                                                 # strip NOWIKI etc. to avoid confusion (true-parameter causes HTML
 193                                                 # comments to be stripped as well)
 194                                                 $rv=$this->getSection($this->mContent,$section);
 195                                                 wfProfileOut( $fname );
 196                                                 return $rv;
 197                                         }
 198                                 }
 199                                 wfProfileOut( $fname );
 200                                 return $this->mContent;
 201                         }
 202                 }
 203         }
 204
 205         /**
 206          * This function returns the text of a section, specified by a number ($section).
 207          * A section is text under a heading like == Heading == or <h1>Heading</h1>, or
 208          * the first section before any such heading (section 0).
 209          *
 210          * If a section contains subsections, these are also returned.
 211          *
 212          * @param string $text text to look in
 213          * @param integer $section section number
 214          * @return string text of the requested section
 215          */
 216         function getSection($text,$section) {
 217
 218                 # strip NOWIKI etc. to avoid confusion (true-parameter causes HTML
 219                 # comments to be stripped as well)
 220                 $striparray=array();
 221                 $parser=new Parser();
 222                 $parser->mOutputType=OT_WIKI;
 223                 $striptext=$parser->strip($text, $striparray, true);
 224
 225                 # now that we can be sure that no pseudo-sections are in the source,
 226                 # split it up by section
 227                 $secs =
 228                   preg_split(
 229                   '/(^=+.+?=+|^<h[1-6].*?' . '>.*?<\/h[1-6].*?' . '>)(?!\S)/mi',
 230                   $striptext, -1,
 231                   PREG_SPLIT_DELIM_CAPTURE);
 232                 if($section==0) {
 233                         $rv=$secs[0];
 234                 } else {
 235                         $headline=$secs[$section*2-1];
 236                         preg_match( '/^(=+).+?=+|^<h([1-6]).*?' . '>.*?<\/h[1-6].*?' . '>(?!\S)/mi',$headline,$matches);
 237                         $hlevel=$matches[1];
 238
 239                         # translate wiki heading into level
 240                         if(strpos($hlevel,'=')!==false) {
 241                                 $hlevel=strlen($hlevel);
 242                         }
 243
 244                         $rv=$headline. $secs[$section*2];
 245                         $count=$section+1;
 246
 247                         $break=false;
 248                         while(!empty($secs[$count*2-1]) && !$break) {
 249
 250                                 $subheadline=$secs[$count*2-1];
 251                                 preg_match( '/^(=+).+?=+|^<h([1-6]).*?' . '>.*?<\/h[1-6].*?' . '>(?!\S)/mi',$subheadline,$matches);
 252                                 $subhlevel=$matches[1];
 253                                 if(strpos($subhlevel,'=')!==false) {
 254                                         $subhlevel=strlen($subhlevel);
 255                                 }
 256                                 if($subhlevel > $hlevel) {
 257                                         $rv.=$subheadline.$secs[$count*2];
 258                                 }
 259                                 if($subhlevel <= $hlevel) {
 260                                         $break=true;
 261                                 }
 262                                 $count++;
 263
 264                         }
 265                 }
 266                 # reinsert stripped tags
 267                 $rv=$parser->unstrip($rv,$striparray);
 268                 $rv=$parser->unstripNoWiki($rv,$striparray);
 269                 $rv=trim($rv);
 270                 return $rv;
 271
 272         }
 273
 274         /**
 275          * Return an array of the columns of the "cur"-table
 276          */
 277         function getContentFields() {
 278                 return $wgArticleContentFields = array(
 279                   'old_text','old_flags',
 280                   'rev_timestamp','rev_user', 'rev_user_text', 'rev_comment','page_counter',
 281                   'page_namespace', 'page_title', 'page_restrictions','page_touched','page_is_redirect' );
 282         }
 283
 284         /**
 285          * Return the oldid of the article that is to be shown.
 286          * For requests with a "direction", this is not the oldid of the
 287          * query
 288          */
 289         function getOldID() {
 290                 global $wgRequest, $wgOut;
 291                 static $lastid;
 292
 293                 if ( isset( $lastid ) ) {
 294                         return $lastid;
 295                 }
 296                 # Query variables :P
 297                 $oldid = $wgRequest->getVal( 'oldid' );
 298                 if ( isset( $oldid ) ) {
 299                         $dbr =& $this->getDB();
 300                         $oldid = IntVal( $oldid );
 301                         if ( $wgRequest->getVal( 'direction' ) == 'next' ) {
 302                                 $nextid = $this->mTitle->getNextRevisionID( $oldid );
 303                                 if ( $nextid  ) {
 304                                         $oldid = $nextid;
 305                                 } else {
 306                                         $wgOut->redirect( $this->mTitle->getFullURL( 'redirect=no' ) );
 307                                 }
 308                         } elseif ( $wgRequest->getVal( 'direction' ) == 'prev' ) {
 309                                 $previd = $this->mTitle->getPreviousRevisionID( $oldid );
 310                                 if ( $previd ) {
 311                                         $oldid = $previd;
 312                                 } else {
 313                                         # TODO
 314                                 }
 315                         }
 316                         $lastid = $oldid;
 317                 }
 318                 return @$oldid; # "@" to be able to return "unset" without PHP complaining
 319         }
 320
 321
 322         /**
 323          * Load the revision (including cur_text) into this object
 324          */
 325         function loadContent( $noredir = false ) {
 326                 global $wgOut, $wgRequest;
 327
 328                 if ( $this->mContentLoaded ) return;
 329
 330                 $dbr =& $this->getDB();
 331                 # Query variables :P
 332                 $oldid = $this->getOldID();
 333                 $redirect = $wgRequest->getVal( 'redirect' );
 334
 335                 $fname = 'Article::loadContent';
 336
 337                 # Pre-fill content with error message so that if something
 338                 # fails we'll have something telling us what we intended.
 339
 340                 $t = $this->mTitle->getPrefixedText();
 341
 342                 $noredir = $noredir || ($wgRequest->getVal( 'redirect' ) == 'no');
 343                 $this->mOldId = $oldid;
 344                 $this->fetchContent( $oldid, $noredir, true );
 345         }
 346
 347         /**
 348          * @param int $oldid 0 for whatever the latest revision is
 349          * @param bool $noredir Set to true to avoid following redirects
 350          * @param bool $globalTitle Set to true to change the global $wgTitle object when following redirects or other unexpected title changes
 351          * @return string
 352          */
 353         function fetchContent( $oldid = 0, $noredir = false, $globalTitle = false ) {
 354                 if ( $this->mContentLoaded ) {
 355                         return $this->mContent;
 356                 }
 357                 $dbr =& $this->getDB();
 358                 $fname = 'Article::fetchContent';
 359
 360                 # Pre-fill content with error message so that if something
 361                 # fails we'll have something telling us what we intended.
 362                 $t = $this->mTitle->getPrefixedText();
 363                 if( $oldid ) {
 364                         $t .= ',oldid='.$oldid;
 365                 }
 366                 if( isset( $redirect ) ) {
 367                         $redirect = ($redirect == 'no') ? 'no' : 'yes';
 368                         $t .= ',redirect='.$redirect;
 369                 }
 370                 $this->mContent = wfMsg( 'missingarticle', $t );
 371
 372                 if( !$oldid ) {
 373                         # Retrieve current version
 374                         $id = $this->getID();
 375                         if ( 0 == $id ) {
 376                                 return false;
 377                         }
 378
 379                         $s = $dbr->selectRow( array( 'text', 'revision', 'page' ),
 380                                 $this->getContentFields(),
 381                                 "page_id='$id' AND rev_page=page_id AND rev_id=page_latest AND old_id=rev_id",
 382                                 $fname, $this->getSelectOptions() );
 383                 } else {
 384                         # Historical revision
 385                         $s = $dbr->selectRow( array( 'text', 'revision', 'page' ),
 386                                 $this->getContentFields(),
 387                                 "rev_page=page_id AND rev_id='$oldid' AND old_id=rev_id",
 388                                 $fname, $this->getSelectOptions() );
 389                 }
 390                 if ( $s === false ) {
 391                         return false;
 392                 }
 393
 394                 # If we got a redirect, follow it (unless we've been told
 395                 # not to by either the function parameter or the query
 396                 if ( !$oldid && !$noredir ) {
 397                         $rt = Title::newFromRedirect( Article::getRevisionText( $s ) );
 398                         # process if title object is valid and not special:userlogout
 399                         if ( $rt && ! ( $rt->getNamespace() == NS_SPECIAL && $rt->getText() == 'Userlogout' ) ) {
 400                                 # Gotta hand redirects to special pages differently:
 401                                 # Fill the HTTP response "Location" header and ignore
 402                                 # the rest of the page we're on.
 403                                 if( $globalTitle ) {
 404                                         global $wgOut;
 405                                         if ( $rt->getInterwiki() != '' ) {
 406                                                 $wgOut->redirect( $rt->getFullURL() ) ;
 407                                                 return false;
 408                                         }
 409                                         if ( $rt->getNamespace() == NS_SPECIAL ) {
 410                                                 $wgOut->redirect( $rt->getFullURL() );
 411                                                 return false;
 412                                         }
 413                                 }
 414                                 $rid = $rt->getArticleID();
 415                                 if ( 0 != $rid ) {
 416                                         $redirRow = $dbr->selectRow( array( 'text', 'revision', 'page' ),
 417                                                 $this->getContentFields(),
 418                                                 "page_id='$rid' AND rev_page=page_id AND rev_id=page_latest AND old_id=rev_id",
 419                                                 $fname, $this->getSelectOptions() );
 420
 421                                         if ( $redirRow !== false ) {
 422                                                 $this->mRedirectedFrom = $this->mTitle->getPrefixedText();
 423                                                 $this->mTitle = $rt;
 424                                                 $s = $redirRow;
 425                                         }
 426                                 }
 427                         }
 428                 }
 429
 430                 # if the title's different from expected, update...
 431                 if( $globalTitle &&
 432                         ( $this->mTitle->getNamespace() != $s->page_namespace ||
 433                         $this->mTitle->getDBkey() != $s->page_title ) ) {
 434                         $oldTitle = Title::makeTitle( $s->page_namesapce, $s->page_title );
 435                         $this->mTitle = $oldTitle;
 436                         global $wgTitle;
 437                         $wgTitle = $oldTitle;
 438                 }
 439
 440                 # Back to the business at hand...
 441                 $this->mCounter = $s->page_counter;
 442                 $this->mTitle->mRestrictions = explode( ',', trim( $s->page_restrictions ) );
 443                 $this->mTitle->mRestrictionsLoaded = true;
 444                 $this->mTouched = wfTimestamp( TS_MW, $s->page_touched );
 445
 446                 $this->mContent = Article::getRevisionText( $s );
 447
 448                 $this->mUser = $s->rev_user;
 449                 $this->mUserText = $s->rev_user_text;
 450                 $this->mComment = $s->rev_comment;
 451                 $this->mTimestamp = wfTimestamp( TS_MW, $s->rev_timestamp );
 452
 453                 $this->mContentLoaded = true;
 454                 return $this->mContent;
 455         }
 456
 457         /**
 458          * Gets the article text without using so many damn globals
 459          * Returns false on error
 460          *
 461          * @param integer $oldid
 462          */
 463         function getContentWithoutUsingSoManyDamnGlobals( $oldid = 0, $noredir = false ) {
 464                 return $this->fetchContent( $oldid, $noredir, false );
 465         }
 466
 467         /**
 468          * Read/write accessor to select FOR UPDATE
 469          */
 470         function forUpdate( $x = NULL ) {
 471                 return wfSetVar( $this->mForUpdate, $x );
 472         }
 473
 474         /**
 475          * Get the database which should be used for reads
 476          */
 477         function &getDB() {
 478                 if ( $this->mForUpdate ) {
 479                         return wfGetDB( DB_MASTER );
 480                 } else {
 481                         return wfGetDB( DB_SLAVE );
 482                 }
 483         }
 484
 485         /**
 486          * Get options for all SELECT statements
 487          * Can pass an option array, to which the class-wide options will be appended
 488          */
 489         function getSelectOptions( $options = '' ) {
 490                 if ( $this->mForUpdate ) {
 491                         if ( $options ) {
 492                                 $options[] = 'FOR UPDATE';
 493                         } else {
 494                                 $options = 'FOR UPDATE';
 495                         }
 496                 }
 497                 return $options;
 498         }
 499
 500         /**
 501          * Return the Article ID
 502          */
 503         function getID() {
 504                 if( $this->mTitle ) {
 505                         return $this->mTitle->getArticleID();
 506                 } else {
 507                         return 0;
 508                 }
 509         }
 510
 511         /**
 512          * Get the view count for this article
 513          */
 514         function getCount() {
 515                 if ( -1 == $this->mCounter ) {
 516                         $id = $this->getID();
 517                         $dbr =& $this->getDB();
 518                         $this->mCounter = $dbr->selectField( 'page', 'page_counter', array( 'page_id' => $id ),
 519                                 'Article::getCount', $this->getSelectOptions() );
 520                 }
 521                 return $this->mCounter;
 522         }
 523
 524         /**
 525          * Would the given text make this article a "good" article (i.e.,
 526          * suitable for including in the article count)?
 527          */
 528         function isCountable( $text ) {
 529                 global $wgUseCommaCount;
 530
 531                 if ( 0 != $this->mTitle->getNamespace() ) { return 0; }
 532                 if ( $this->isRedirect( $text ) ) { return 0; }
 533                 $token = ($wgUseCommaCount ? ',' : '[[' );
 534                 if ( false === strstr( $text, $token ) ) { return 0; }
 535                 return 1;
 536         }
 537
 538         /**
 539          * Tests if the article text represents a redirect
 540          */
 541         function isRedirect( $text = false ) {
 542                 if ( $text === false ) {
 543                         $this->loadContent();
 544                         $titleObj = Title::newFromRedirect( $this->mText );
 545                 } else {
 546                         $titleObj = Title::newFromRedirect( $text );
 547                 }
 548                 return $titleObj !== NULL;
 549         }
 550
 551         /**
 552          * Loads everything except the text
 553          * This isn't necessary for all uses, so it's only done if needed.
 554          * @private
 555          */
 556         function loadLastEdit() {
 557                 global $wgOut;
 558
 559                 if ( -1 != $this->mUser )
 560                         return;
 561
 562                 $fname = 'Article::loadLastEdit';
 563
 564                 $dbr =& $this->getDB();
 565                 $s = $dbr->selectRow( array( 'revision', 'page') ,
 566                   array( 'rev_user','rev_user_text','rev_timestamp', 'rev_comment','rev_minor_edit' ),
 567                   array( 'page_id' => $this->getID(), 'page_latest=rev_id' ), $fname, $this->getSelectOptions() );
 568
 569                 if ( $s !== false ) {
 570                         $this->mUser = $s->rev_user;
 571                         $this->mUserText = $s->rev_user_text;
 572                         $this->mTimestamp = wfTimestamp(TS_MW,$s->rev_timestamp);
 573                         $this->mComment = $s->rev_comment;
 574                         $this->mMinorEdit = $s->rev_minor_edit;
 575                 }
 576         }
 577
 578         function getTimestamp() {
 579                 $this->loadLastEdit();
 580                 return $this->mTimestamp;
 581         }
 582
 583         function getUser() {
 584                 $this->loadLastEdit();
 585                 return $this->mUser;
 586         }
 587
 588         function getUserText() {
 589                 $this->loadLastEdit();
 590                 return $this->mUserText;
 591         }
 592
 593         function getComment() {
 594                 $this->loadLastEdit();
 595                 return $this->mComment;
 596         }
 597
 598         function getMinorEdit() {
 599                 $this->loadLastEdit();
 600                 return $this->mMinorEdit;
 601         }
 602
 603         function getContributors($limit = 0, $offset = 0) {
 604                 $fname = 'Article::getContributors';
 605
 606                 # XXX: this is expensive; cache this info somewhere.
 607
 608                 $title = $this->mTitle;
 609                 $contribs = array();
 610                 $dbr =& $this->getDB();
 611                 $revTable = $dbr->tableName( 'revision' );
 612                 $userTable = $dbr->tableName( 'user' );
 613                 $encDBkey = $dbr->addQuotes( $title->getDBkey() );
 614                 $ns = $title->getNamespace();
 615                 $user = $this->getUser();
 616
 617                 $sql = "SELECT rev_user, rev_user_text, user_real_name, MAX(rev_timestamp) as timestamp
 618                         FROM $revTable LEFT JOIN $userTable ON rev_user = user_id
 619                         WHERE rev_page = $pageId
 620                         AND old_user != $user
 621                         GROUP BY rev_user, rev_user_text, user_real_name
 622                         ORDER BY timestamp DESC";
 623
 624                 if ($limit > 0) { $sql .= ' LIMIT '.$limit; }
 625                 $sql .= ' '. $this->getSelectOptions();
 626
 627                 $res = $dbr->query($sql, $fname);
 628
 629                 while ( $line = $dbr->fetchObject( $res ) ) {
 630                         $contribs[] = array($line->rev_user, $line->rev_user_text, $line->user_real_name);
 631                 }
 632
 633                 $dbr->freeResult($res);
 634                 return $contribs;
 635         }
 636
 637         /**
 638          * This is the default action of the script: just view the page of
 639          * the given title.
 640         */
 641         function view() {
 642                 global $wgUser, $wgOut, $wgRequest, $wgOnlySysopsCanPatrol, $wgLang;
 643                 global $wgLinkCache, $IP, $wgEnableParserCache, $wgStylePath, $wgUseRCPatrol;
 644                 global $wgEnotif;
 645                 $sk = $wgUser->getSkin();
 646
 647                 $fname = 'Article::view';
 648                 wfProfileIn( $fname );
 649                 # Get variables from query string
 650                 $oldid = $this->getOldID();
 651                 $diff = $wgRequest->getVal( 'diff' );
 652                 $rcid = $wgRequest->getVal( 'rcid' );
 653
 654                 $wgOut->setArticleFlag( true );
 655                 $wgOut->setRobotpolicy( 'index,follow' );
 656                 # If we got diff and oldid in the query, we want to see a
 657                 # diff page instead of the article.
 658
 659                 if ( !is_null( $diff ) ) {
 660                         require_once( 'DifferenceEngine.php' );
 661                         $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
 662                         $de = new DifferenceEngine( $oldid, $diff, $rcid );
 663                         $de->showDiffPage();
 664                         if( $diff == 0 ) {
 665                                 # Run view updates for current revision only
 666                                 $this->viewUpdates();
 667                         }
 668                         wfProfileOut( $fname );
 669                         return;
 670                 }
 671                 if ( empty( $oldid ) && $this->checkTouched() ) {
 672                         if( $wgOut->checkLastModified( $this->mTouched ) ){
 673                                 wfProfileOut( $fname );
 674                                 return;
 675                         } else if ( $this->tryFileCache() ) {
 676                                 # tell wgOut that output is taken care of
 677                                 $wgOut->disable();
 678                                 $this->viewUpdates();
 679                                 wfProfileOut( $fname );
 680                                 return;
 681                         }
 682                 }
 683                 # Should the parser cache be used?
 684                 if ( $wgEnableParserCache && intval($wgUser->getOption( 'stubthreshold' )) == 0 && empty( $oldid ) ) {
 685                         $pcache = true;
 686                 } else {
 687                         $pcache = false;
 688                 }
 689
 690                 $outputDone = false;
 691                 if ( $pcache ) {
 692                         if ( $wgOut->tryParserCache( $this, $wgUser ) ) {
 693                                 $outputDone = true;
 694                         }
 695                 }
 696                 if ( !$outputDone ) {
 697                         $text = $this->getContent( false ); # May change mTitle by following a redirect
 698
 699                         # Another whitelist check in case oldid or redirects are altering the title
 700                         if ( !$this->mTitle->userCanRead() ) {
 701                                 $wgOut->loginToUse();
 702                                 $wgOut->output();
 703                                 exit;
 704                         }
 705
 706
 707                         # We're looking at an old revision
 708
 709                         if ( !empty( $oldid ) ) {
 710                                 $this->setOldSubtitle( isset($this->mOldId) ? $this->mOldId : $oldid );
 711                                 $wgOut->setRobotpolicy( 'noindex,follow' );
 712                         }
 713                         if ( '' != $this->mRedirectedFrom ) {
 714                                 $sk = $wgUser->getSkin();
 715                                 $redir = $sk->makeKnownLink( $this->mRedirectedFrom, '',
 716                                   'redirect=no' );
 717                                 $s = wfMsg( 'redirectedfrom', $redir );
 718                                 $wgOut->setSubtitle( $s );
 719
 720                                 # Can't cache redirects
 721                                 $pcache = false;
 722                         }
 723
 724                         # wrap user css and user js in pre and don't parse
 725                         # XXX: use $this->mTitle->usCssJsSubpage() when php is fixed/ a workaround is found
 726                         if (
 727                                 $this->mTitle->getNamespace() == NS_USER &&
 728                                 preg_match('/\\/[\\w]+\\.(css|js)$/', $this->mTitle->getDBkey())
 729                         ) {
 730                                 $wgOut->addWikiText( wfMsg('clearyourcache'));
 731                                 $wgOut->addHTML( '<pre>'.htmlspecialchars($this->mContent)."\n</pre>" );
 732                         } else if ( $rt = Title::newFromRedirect( $text ) ) {
 733                                 # Display redirect
 734                                 $imageUrl = $wgStylePath.'/common/images/redirect.png';
 735                                 $targetUrl = $rt->escapeLocalURL();
 736                                 $titleText = htmlspecialchars( $rt->getPrefixedText() );
 737                                 $link = $sk->makeLinkObj( $rt );
 738
 739                                 $wgOut->addHTML( '<img valign="center" src="'.$imageUrl.'" alt="#REDIRECT" />' .
 740                                   '<span class="redirectText">'.$link.'</span>' );
 741
 742                         } else if ( $pcache ) {
 743                                 # Display content and save to parser cache
 744                                 $wgOut->addPrimaryWikiText( $text, $this );
 745                         } else {
 746                                 # Display content, don't attempt to save to parser cache
 747                                 $wgOut->addWikiText( $text );
 748                         }
 749                 }
 750                 $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
 751                 # If we have been passed an &rcid= parameter, we want to give the user a
 752                 # chance to mark this new article as patrolled.
 753                 if ( $wgUseRCPatrol && !is_null ( $rcid ) && $rcid != 0 && $wgUser->getID() != 0 &&
 754                      ( $wgUser->isAllowed('patrol') || !$wgOnlySysopsCanPatrol ) )
 755                 {
 756                         $wgOut->addHTML( wfMsg ( 'markaspatrolledlink',
 757                                 $sk->makeKnownLinkObj ( $this->mTitle, wfMsg ( 'markaspatrolledtext' ),
 758                                         'action=markpatrolled&rcid='.$rcid )
 759                          ) );
 760                 }
 761
 762                 # Put link titles into the link cache
 763                 $wgOut->transformBuffer();
 764
 765                 # Add link titles as META keywords
 766                 $wgOut->addMetaTags() ;
 767
 768                 $this->viewUpdates();
 769                 wfProfileOut( $fname );
 770
 771                 $wgUser->clearNotification( $this->mTitle );
 772         }
 773
 774         /**
 775          * Theoretically we could defer these whole insert and update
 776          * functions for after display, but that's taking a big leap
 777          * of faith, and we want to be able to report database
 778          * errors at some point.
 779          * @private
 780          */
 781         function insertNewArticle( $text, $summary, $isminor, $watchthis ) {
 782                 global $wgOut, $wgUser;
 783                 global $wgUseSquid, $wgDeferredUpdateList, $wgInternalServer;
 784
 785                 $fname = 'Article::insertNewArticle';
 786
 787                 $this->mCountAdjustment = $this->isCountable( $text );
 788
 789                 $ns = $this->mTitle->getNamespace();
 790                 $ttl = $this->mTitle->getDBkey();
 791                 $text = $this->preSaveTransform( $text );
 792                 if ( $this->isRedirect( $text ) ) { $redir = 1; }
 793                 else { $redir = 0; }
 794
 795                 $now = wfTimestampNow();
 796                 $won = wfInvertTimestamp( $now );
 797                 wfSeedRandom();
 798                 $rand = wfRandom();
 799                 $isminor = ( $isminor && $wgUser->getID() ) ? 1 : 0;
 800
 801                 $mungedText = $text;
 802                 $flags = Article::compressRevisionText( $mungedText );
 803
 804                 $dbw =& wfGetDB( DB_MASTER );
 805
 806                 $old_id = $dbw->nextSequenceValue( 'text_old_id_seq' );
 807                 $dbw->insert( 'text', array(
 808                         'old_id' => $old_id,
 809                         'old_text' => $mungedText,
 810                         'old_flags' => $flags,
 811                 ), $fname );
 812                 $revisionId = $dbw->insertId();
 813
 814                 $page_id = $dbw->nextSequenceValue( 'page_page_id_seq' );
 815                 $dbw->insert( 'page', array(
 816                         'page_id' => $page_id,
 817                         'page_namespace' => $ns,
 818                         'page_title' => $ttl,
 819                         'page_counter' => 0,
 820                         'page_restrictions' => '',
 821                         'page_is_redirect' => $redir,
 822                         'page_is_new' => 1,
 823                         'page_random' => $rand,
 824                         'page_touched' => $dbw->timestamp($now),
 825                         'page_latest' => $revisionId,
 826                 ), $fname );
 827                 $newid = $dbw->insertId();
 828
 829                 $dbw->insert( 'revision', array(
 830                         'rev_page' => $newid,
 831                         'rev_id' => $revisionId,
 832                         'rev_comment' => $summary,
 833                         'rev_user' => $wgUser->getID(),
 834                         'rev_timestamp' => $dbw->timestamp($now),
 835                         'rev_minor_edit' => $isminor,
 836                         'rev_user_text' => $wgUser->getName(),
 837                         'inverse_timestamp' => $won,
 838                 ), $fname );
 839
 840                 $this->mTitle->resetArticleID( $newid );
 841
 842                 Article::onArticleCreate( $this->mTitle );
 843                 RecentChange::notifyNew( $now, $this->mTitle, $isminor, $wgUser, $summary );
 844
 845                 if ($watchthis) {
 846                         if(!$this->mTitle->userIsWatching()) $this->watch();
 847                 } else {
 848                         if ( $this->mTitle->userIsWatching() ) {
 849                                 $this->unwatch();
 850                         }
 851                 }
 852
 853                 # The talk page isn't in the regular link tables, so we need to update manually:
 854                 $talkns = $ns ^ 1; # talk -> normal; normal -> talk
 855                 $dbw->update( 'page',
 856                         array( 'page_touched' => $dbw->timestamp($now) ),
 857                         array( 'page_namespace' => $talkns,
 858                                'page_title' => $ttl ),
 859                         $fname );
 860
 861                 # standard deferred updates
 862                 $this->editUpdates( $text, $summary, $isminor, $now );
 863
 864                 $oldid = 0; # new article
 865                 $this->showArticle( $text, wfMsg( 'newarticle' ), false, $isminor, $now, $summary, $oldid );
 866         }
 867
 868         /**
 869          * Fetch and uncompress the text for a given revision.
 870          * Can ask by rev_id number or timestamp (set $field)
 871          */
 872         function fetchRevisionText( $revId = null, $field = 'rev_id' ) {
 873                 $fname = 'Article::fetchRevisionText';
 874                 $dbw =& wfGetDB( DB_MASTER );
 875                 if( $revId ) {
 876                         $rev = $dbw->addQuotes( $revId );
 877                 } else {
 878                         $rev = 'page_latest';
 879                 }
 880                 $result = $dbw->query(
 881                         sprintf( "SELECT old_text, old_flags
 882                                 FROM %s,%s,%s
 883                                 WHERE old_id=rev_id AND rev_page=page_id AND page_id=%d
 884                                 AND %s=%s",
 885                                 $dbw->tableName( 'page' ),
 886                                 $dbw->tableName( 'revision' ),
 887                                 $dbw->tableName( 'text' ),
 888                                 IntVal( $this->mTitle->getArticleId() ),
 889                                 $field,
 890                                 $rev ),
 891                         $fname );
 892                 $obj = $dbw->fetchObject( $result );
 893                 $dbw->freeResult( $result );
 894                 $oldtext = Article::getRevisionText( $obj );
 895                 return $oldtext;
 896         }
 897
 898         function getTextOfLastEditWithSectionReplacedOrAdded($section, $text, $summary = '', $edittime = NULL) {
 899                 $fname = 'Article::getTextOfLastEditWithSectionReplacedOrAdded';
 900                 if( is_null( $edittime ) ) {
 901                         $oldtext = $this->fetchRevisionText();
 902                 } else {
 903                         $oldtext = $this->fetchRevisionText( $edittime, 'rev_timestamp' );
 904                 }
 905                 if ($section != '') {
 906                         if($section=='new') {
 907                                 if($summary) $subject="== {$summary} ==\n\n";
 908                                 $text=$oldtext."\n\n".$subject.$text;
 909                         } else {
 910
 911                                 # strip NOWIKI etc. to avoid confusion (true-parameter causes HTML
 912                                 # comments to be stripped as well)
 913                                 $striparray=array();
 914                                 $parser=new Parser();
 915                                 $parser->mOutputType=OT_WIKI;
 916                                 $oldtext=$parser->strip($oldtext, $striparray, true);
 917
 918                                 # now that we can be sure that no pseudo-sections are in the source,
 919                                 # split it up
 920                                 # Unfortunately we can't simply do a preg_replace because that might
 921                                 # replace the wrong section, so we have to use the section counter instead
 922                                 $secs=preg_split('/(^=+.+?=+|^<h[1-6].*?' . '>.*?<\/h[1-6].*?' . '>)(?!\S)/mi',
 923                                   $oldtext,-1,PREG_SPLIT_DELIM_CAPTURE);
 924                                 $secs[$section*2]=$text."\n\n"; // replace with edited
 925
 926                                 # section 0 is top (intro) section
 927                                 if($section!=0) {
 928
 929                                         # headline of old section - we need to go through this section
 930                                         # to determine if there are any subsections that now need to
 931                                         # be erased, as the mother section has been replaced with
 932                                         # the text of all subsections.
 933                                         $headline=$secs[$section*2-1];
 934                                         preg_match( '/^(=+).+?=+|^<h([1-6]).*?' . '>.*?<\/h[1-6].*?' . '>(?!\S)/mi',$headline,$matches);
 935                                         $hlevel=$matches[1];
 936
 937                                         # determine headline level for wikimarkup headings
 938                                         if(strpos($hlevel,'=')!==false) {
 939                                                 $hlevel=strlen($hlevel);
 940                                         }
 941
 942                                         $secs[$section*2-1]=''; // erase old headline
 943                                         $count=$section+1;
 944                                         $break=false;
 945                                         while(!empty($secs[$count*2-1]) && !$break) {
 946
 947                                                 $subheadline=$secs[$count*2-1];
 948                                                 preg_match(
 949                                                  '/^(=+).+?=+|^<h([1-6]).*?' . '>.*?<\/h[1-6].*?' . '>(?!\S)/mi',$subheadline,$matches);
 950                                                 $subhlevel=$matches[1];
 951                                                 if(strpos($subhlevel,'=')!==false) {
 952                                                         $subhlevel=strlen($subhlevel);
 953                                                 }
 954                                                 if($subhlevel > $hlevel) {
 955                                                         // erase old subsections
 956                                                         $secs[$count*2-1]='';
 957                                                         $secs[$count*2]='';
 958                                                 }
 959                                                 if($subhlevel <= $hlevel) {
 960                                                         $break=true;
 961                                                 }
 962                                                 $count++;
 963
 964                                         }
 965
 966                                 }
 967                                 $text=join('',$secs);
 968                                 # reinsert the stuff that we stripped out earlier
 969                                 $text=$parser->unstrip($text,$striparray);
 970                                 $text=$parser->unstripNoWiki($text,$striparray);
 971                         }
 972
 973                 }
 974                 return $text;
 975         }
 976
 977         /**
 978          * Change an existing article. Puts the previous version back into the old table, updates RC
 979          * and all necessary caches, mostly via the deferred update array.
 980          *
 981          * It is possible to call this function from a command-line script, but note that you should
 982          * first set $wgUser, and clean up $wgDeferredUpdates after each edit.
 983          */
 984         function updateArticle( $text, $summary, $minor, $watchthis, $forceBot = false, $sectionanchor = '' ) {
 985                 global $wgOut, $wgUser;
 986                 global $wgDBtransactions, $wgMwRedir;
 987                 global $wgUseSquid, $wgInternalServer;
 988
 989                 $fname = 'Article::updateArticle';
 990                 $good = true;
 991
 992                 if ( $this->mMinorEdit ) { $me1 = 1; } else { $me1 = 0; }
 993                 if ( $minor && $wgUser->getID() ) { $me2 = 1; } else { $me2 = 0; }
 994                 if ( $this->isRedirect( $text ) ) {
 995                         # Remove all content but redirect
 996                         # This could be done by reconstructing the redirect from a title given by
 997                         # Title::newFromRedirect(), but then we wouldn't know which synonym the user
 998                         # wants to see
 999                         if ( preg_match( "/^((" . $wgMwRedir->getBaseRegex() . ')[^\\n]+)/i', $text, $m ) ) {
1000                                 $redir = 1;
1001                                 $text = $m[1] . "\n";
1002                         }
1003                 }
1004                 else { $redir = 0; }
1005
1006                 $text = $this->preSaveTransform( $text );
1007                 $dbw =& wfGetDB( DB_MASTER );
1008
1009                 # Update article, but only if changed.
1010
1011                 # It's important that we either rollback or complete, otherwise an attacker could
1012                 # overwrite cur entries by sending precisely timed user aborts. Random bored users
1013                 # could conceivably have the same effect, especially if cur is locked for long periods.
1014                 if( $wgDBtransactions ) {
1015                         $dbw->query( 'BEGIN', $fname );
1016                 } else {
1017                         $userAbort = ignore_user_abort( true );
1018                 }
1019
1020                 $oldtext = $this->getContent( true );
1021
1022                 if ( 0 != strcmp( $text, $oldtext ) ) {
1023                         $this->mCountAdjustment = $this->isCountable( $text )
1024                           - $this->isCountable( $oldtext );
1025                         $now = wfTimestampNow();
1026                         $won = wfInvertTimestamp( $now );
1027
1028                         $mungedText = $text;
1029                         $flags = Article::compressRevisionText( $newtext );
1030
1031                         $lastRevision = $dbw->selectField(
1032                                 'page', 'page_latest', array( 'page_id' => $this->getId() ) );
1033
1034                         # Record the text to the text table
1035                         $old_id = $dbw->nextSequenceValue( 'text_old_id_val' );
1036                         $dbw->insert( 'text',
1037                                 array(
1038                                         'old_id' => $old_id,
1039                                         'old_text' => $mungedText,
1040                                         'old_flags' => $flags,
1041                                 ), $fname
1042                         );
1043                         $revisionId = $dbw->insertId();
1044
1045                         # Record the edit in revisions
1046                         $dbw->insert( 'revision',
1047                                 array(
1048                                         'rev_id' => $revisionId,
1049                                         'rev_page' => $this->getID(),
1050                                         'rev_comment' => $summary,
1051                                         'rev_minor_edit' => $me2,
1052                                         'rev_user' => $wgUser->getID(),
1053                                         'rev_user_text' => $wgUser->getName(),
1054                                         'rev_timestamp' => $dbw->timestamp( $now ),
1055                                         'inverse_timestamp' => $won
1056                                 ), $fname
1057                         );
1058
1059                         # Update page
1060                         $dbw->update( 'page',
1061                                 array( /* SET */
1062                                         'page_latest' => $revisionId,
1063                                         'page_touched' => $dbw->timestamp( $now ),
1064                                         'page_is_new' => 0,
1065                                         'page_is_redirect' => $redir,
1066                                 ), array( /* WHERE */
1067                                         'page_id' => $this->getID(),
1068                                         'page_latest' => $lastRevision, # Paranoia
1069                                 ), $fname
1070                         );
1071
1072                         if( $dbw->affectedRows() == 0 ) {
1073                                 /* Belated edit conflict! Run away!! */
1074                                 $good = false;
1075                         } else {
1076                                 # Update recentchanges and purge cache and whatnot
1077                                 $bot = (int)($wgUser->isBot() || $forceBot);
1078                                 RecentChange::notifyEdit( $now, $this->mTitle, $me2, $wgUser, $summary,
1079                                         $lastRevision, $this->getTimestamp(), $bot );
1080                                 Article::onArticleEdit( $this->mTitle );
1081                         }
1082                 }
1083
1084                 if( $wgDBtransactions ) {
1085                         $dbw->query( 'COMMIT', $fname );
1086                 } else {
1087                         ignore_user_abort( $userAbort );
1088                 }
1089
1090                 if ( $good ) {
1091                 if ($watchthis) {
1092                         if (!$this->mTitle->userIsWatching()) $this->watch();
1093                 } else {
1094                         if ( $this->mTitle->userIsWatching() ) {
1095                                 $this->unwatch();
1096                         }
1097                 }
1098                 # standard deferred updates
1099                 $this->editUpdates( $text, $summary, $minor, $now );
1100
1101
1102                 $urls = array();
1103                 # Template namespace
1104                 # Purge all articles linking here
1105                 if ( $this->mTitle->getNamespace() == NS_TEMPLATE) {
1106                         $titles = $this->mTitle->getLinksTo();
1107                         Title::touchArray( $titles );
1108                         if ( $wgUseSquid ) {
1109                                         foreach ( $titles as $title ) {
1110                                                 $urls[] = $title->getInternalURL();
1111                                         }
1112                         }
1113                 }
1114
1115                 # Squid updates
1116                 if ( $wgUseSquid ) {
1117                         $urls = array_merge( $urls, $this->mTitle->getSquidURLs() );
1118                         $u = new SquidUpdate( $urls );
1119                         $u->doUpdate();
1120                 }
1121
1122                 $this->showArticle( $text, wfMsg( 'updated' ), $sectionanchor, $me2, $now, $summary, $revisionId );
1123                 }
1124                 return $good;
1125         }
1126
1127         /**
1128          * After we've either updated or inserted the article, update
1129          * the link tables and redirect to the new page.
1130          */
1131         function showArticle( $text, $subtitle , $sectionanchor = '', $me2, $now, $summary, $oldid ) {
1132                 global $wgOut, $wgUser, $wgLinkCache, $wgEnotif;
1133
1134                 $wgLinkCache = new LinkCache();
1135                 # Select for update
1136                 $wgLinkCache->forUpdate( true );
1137
1138                 # Get old version of link table to allow incremental link updates
1139                 $wgLinkCache->preFill( $this->mTitle );
1140                 $wgLinkCache->clear();
1141
1142                 # Parse the text and replace links with placeholders
1143                 $wgOut = new OutputPage();
1144                 $wgOut->addWikiText( $text );
1145
1146                 # Look up the links in the DB and add them to the link cache
1147                 $wgOut->transformBuffer( RLH_FOR_UPDATE );
1148
1149                 if( $this->isRedirect( $text ) )
1150                         $r = 'redirect=no';
1151                 else
1152                         $r = '';
1153                 $wgOut->redirect( $this->mTitle->getFullURL( $r ).$sectionanchor );
1154
1155                 # this call would better fit into RecentChange::notifyEdit and RecentChange::notifyNew .
1156                 # this will be improved later (to-do)
1157
1158                 include_once( "UserMailer.php" );
1159                 $wgEnotif = new EmailNotification ();
1160                 $wgEnotif->NotifyOnPageChange( $wgUser->getID(), $this->mTitle->getDBkey(), $this->mTitle->getNamespace(),$now, $summary, $me2, $oldid );
1161         }
1162
1163         /**
1164          * Validate article
1165          * @todo document this function a bit more
1166          */
1167         function validate () {
1168                 global $wgOut, $wgUseValidation;
1169                 if( $wgUseValidation ) {
1170                         require_once ( 'SpecialValidate.php' ) ;
1171                         $wgOut->setPagetitle( wfMsg( 'validate' ) . ': ' . $this->mTitle->getPrefixedText() );
1172                         $wgOut->setRobotpolicy( 'noindex,follow' );
1173                         if( $this->mTitle->getNamespace() != 0 ) {
1174                                 $wgOut->addHTML( wfMsg( 'val_validate_article_namespace_only' ) );
1175                                 return;
1176                         }
1177                         $v = new Validation;
1178                         $v->validate_form( $this->mTitle->getDBkey() );
1179                 } else {
1180                         $wgOut->errorpage( 'nosuchaction', 'nosuchactiontext' );
1181                 }
1182         }
1183
1184         /**
1185          * Mark this particular edit as patrolled
1186          */
1187         function markpatrolled() {
1188                 global $wgOut, $wgRequest, $wgOnlySysopsCanPatrol, $wgUseRCPatrol, $wgUser;
1189                 $wgOut->setRobotpolicy( 'noindex,follow' );
1190
1191                 if ( !$wgUseRCPatrol )
1192                 {
1193                         $wgOut->errorpage( 'rcpatroldisabled', 'rcpatroldisabledtext' );
1194                         return;
1195                 }
1196                 if ( $wgUser->getID() == 0 )
1197                 {
1198                         $wgOut->loginToUse();
1199                         return;
1200                 }
1201                 if ( $wgOnlySysopsCanPatrol && !$wgUser->isAllowed('patrol') )
1202                 {
1203                         $wgOut->sysopRequired();
1204                         return;
1205                 }
1206                 $rcid = $wgRequest->getVal( 'rcid' );
1207                 if ( !is_null ( $rcid ) )
1208                 {
1209                         RecentChange::markPatrolled( $rcid );
1210                         $wgOut->setPagetitle( wfMsg( 'markedaspatrolled' ) );
1211                         $wgOut->addWikiText( wfMsg( 'markedaspatrolledtext' ) );
1212
1213                         $rcTitle = Title::makeTitle( NS_SPECIAL, 'Recentchanges' );
1214                         $wgOut->returnToMain( false, $rcTitle->getPrefixedText() );
1215                 }
1216                 else
1217                 {
1218                         $wgOut->errorpage( 'markedaspatrollederror', 'markedaspatrollederrortext' );
1219                 }
1220         }
1221
1222
1223         /**
1224          * Add this page to $wgUser's watchlist
1225          */
1226
1227         function watch() {
1228
1229                 global $wgUser, $wgOut;
1230
1231                 if ( 0 == $wgUser->getID() ) {
1232                         $wgOut->errorpage( 'watchnologin', 'watchnologintext' );
1233                         return;
1234                 }
1235                 if ( wfReadOnly() ) {
1236                         $wgOut->readOnlyPage();
1237                         return;
1238                 }
1239
1240                 if (wfRunHooks('WatchArticle', $wgUser, $this)) {
1241
1242                         $wgUser->addWatch( $this->mTitle );
1243                         $wgUser->saveSettings();
1244
1245                         wfRunHooks('WatchArticleComplete', $wgUser, $this);
1246
1247                         $wgOut->setPagetitle( wfMsg( 'addedwatch' ) );
1248                         $wgOut->setRobotpolicy( 'noindex,follow' );
1249
1250                         $link = $this->mTitle->getPrefixedText();
1251                         $text = wfMsg( 'addedwatchtext', $link );
1252                         $wgOut->addWikiText( $text );
1253                 }
1254
1255                 $wgOut->returnToMain( true, $this->mTitle->getPrefixedText() );
1256         }
1257
1258         /**
1259          * Stop watching a page
1260          */
1261
1262         function unwatch() {
1263
1264                 global $wgUser, $wgOut;
1265
1266                 if ( 0 == $wgUser->getID() ) {
1267                         $wgOut->errorpage( 'watchnologin', 'watchnologintext' );
1268                         return;
1269                 }
1270                 if ( wfReadOnly() ) {
1271                         $wgOut->readOnlyPage();
1272                         return;
1273                 }
1274
1275                 if (wfRunHooks('UnwatchArticle', $wgUser, $this)) {
1276
1277                         $wgUser->removeWatch( $this->mTitle );
1278                         $wgUser->saveSettings();
1279
1280                         wfRunHooks('UnwatchArticleComplete', $wgUser, $this);
1281
1282                         $wgOut->setPagetitle( wfMsg( 'removedwatch' ) );
1283                         $wgOut->setRobotpolicy( 'noindex,follow' );
1284
1285                         $link = $this->mTitle->getPrefixedText();
1286                         $text = wfMsg( 'removedwatchtext', $link );
1287                         $wgOut->addWikiText( $text );
1288                 }
1289
1290                 $wgOut->returnToMain( true, $this->mTitle->getPrefixedText() );
1291         }
1292
1293         /**
1294          * protect a page
1295          */
1296         function protect( $limit = 'sysop' ) {
1297                 global $wgUser, $wgOut, $wgRequest;
1298
1299                 if ( ! $wgUser->isAllowed('protect') ) {
1300                         $wgOut->sysopRequired();
1301                         return;
1302                 }
1303                 if ( wfReadOnly() ) {
1304                         $wgOut->readOnlyPage();
1305                         return;
1306                 }
1307                 $id = $this->mTitle->getArticleID();
1308                 if ( 0 == $id ) {
1309                         $wgOut->fatalError( wfMsg( 'badarticleerror' ) );
1310                         return;
1311                 }
1312
1313                 $confirm = $wgRequest->getBool( 'wpConfirmProtect' ) && $wgRequest->wasPosted();
1314                 $moveonly = $wgRequest->getBool( 'wpMoveOnly' );
1315                 $reason = $wgRequest->getText( 'wpReasonProtect' );
1316
1317                 if ( $confirm ) {
1318                         $dbw =& wfGetDB( DB_MASTER );
1319                         $dbw->update( 'page',
1320                                 array( /* SET */
1321                                         'page_touched' => $dbw->timestamp(),
1322                                         'page_restrictions' => (string)$limit
1323                                 ), array( /* WHERE */
1324                                         'page_id' => $id
1325                                 ), 'Article::protect'
1326                         );
1327
1328                         $restrictions = "move=" . $limit;
1329                         if( !$moveonly ) {
1330                                 $restrictions .= ":edit=" . $limit;
1331                         }
1332                         if (wfRunHooks('ArticleProtect', $this, $wgUser, $limit == 'sysop', $reason, $moveonly)) {
1333
1334                                 $dbw =& wfGetDB( DB_MASTER );
1335                                 $dbw->update( 'cur',
1336                                                           array( /* SET */
1337                                                                          'cur_touched' => $dbw->timestamp(),
1338                                                                          'cur_restrictions' => $restrictions
1339                                                                          ), array( /* WHERE */
1340                                                                                            'cur_id' => $id
1341                                                                                            ), 'Article::protect'
1342                                                           );
1343
1344                                 wfRunHooks('ArticleProtectComplete', $this, $wgUser, $limit == 'sysop', $reason, $moveonly);
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                         }
1354                         return;
1355                 } else {
1356                         $reason = htmlspecialchars( wfMsg( 'protectreason' ) );
1357                         return $this->confirmProtect( '', $reason, $limit );
1358                 }
1359         }
1360
1361         /**
1362          * Output protection confirmation dialog
1363          */
1364         function confirmProtect( $par, $reason, $limit = 'sysop'  ) {
1365                 global $wgOut;
1366
1367                 wfDebug( "Article::confirmProtect\n" );
1368
1369                 $sub = htmlspecialchars( $this->mTitle->getPrefixedText() );
1370                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
1371
1372                 $check = '';
1373                 $protcom = '';
1374                 $moveonly = '';
1375
1376                 if ( $limit === '' ) {
1377                         $wgOut->setPageTitle( wfMsg( 'confirmunprotect' ) );
1378                         $wgOut->setSubtitle( wfMsg( 'unprotectsub', $sub ) );
1379                         $wgOut->addWikiText( wfMsg( 'confirmunprotecttext' ) );
1380                         $check = htmlspecialchars( wfMsg( 'confirmunprotect' ) );
1381                         $protcom = htmlspecialchars( wfMsg( 'unprotectcomment' ) );
1382                         $formaction = $this->mTitle->escapeLocalURL( 'action=unprotect' . $par );
1383                 } else {
1384                         $wgOut->setPageTitle( wfMsg( 'confirmprotect' ) );
1385                         $wgOut->setSubtitle( wfMsg( 'protectsub', $sub ) );
1386                         $wgOut->addWikiText( wfMsg( 'confirmprotecttext' ) );
1387                         $check = htmlspecialchars( wfMsg( 'confirmprotect' ) );
1388                         $moveonly = htmlspecialchars( wfMsg( 'protectmoveonly' ) );
1389                         $protcom = htmlspecialchars( wfMsg( 'protectcomment' ) );
1390                         $formaction = $this->mTitle->escapeLocalURL( 'action=protect' . $par );
1391                 }
1392
1393                 $confirm = htmlspecialchars( wfMsg( 'confirm' ) );
1394
1395                 $wgOut->addHTML( "
1396 <form id='protectconfirm' method='post' action=\"{$formaction}\">
1397         <table border='0'>
1398                 <tr>
1399                         <td align='right'>
1400                                 <label for='wpReasonProtect'>{$protcom}:</label>
1401                         </td>
1402                         <td align='left'>
1403                                 <input type='text' size='60' name='wpReasonProtect' id='wpReasonProtect' value=\"" . htmlspecialchars( $reason ) . "\" />
1404                         </td>
1405                 </tr>
1406                 <tr>
1407                         <td>&nbsp;</td>
1408                 </tr>
1409                 <tr>
1410                         <td align='right'>
1411                                 <input type='checkbox' name='wpConfirmProtect' value='1' id='wpConfirmProtect' />
1412                         </td>
1413                         <td>
1414                                 <label for='wpConfirmProtect'>{$check}</label>
1415                         </td>
1416                 </tr> " );
1417                 if($moveonly != '') {
1418                         $wgOut->AddHTML( "
1419                 <tr>
1420                         <td align='right'>
1421                                 <input type='checkbox' name='wpMoveOnly' value='1' id='wpMoveOnly' />
1422                         </td>
1423                         <td>
1424                                 <label for='wpMoveOnly'>{$moveonly}</label>
1425                         </td>
1426                 </tr> " );
1427                 }
1428                 $wgOut->addHTML( "
1429                 <tr>
1430                         <td>&nbsp;</td>
1431                         <td>
1432                                 <input type='submit' name='wpConfirmProtectB' value=\"{$confirm}\" />
1433                         </td>
1434                 </tr>
1435         </table>
1436 </form>\n" );
1437
1438                 $wgOut->returnToMain( false );
1439         }
1440
1441         /**
1442          * Unprotect the pages
1443          */
1444         function unprotect() {
1445                 return $this->protect( '' );
1446         }
1447
1448         /*
1449          * UI entry point for page deletion
1450          */
1451         function delete() {
1452                 global $wgUser, $wgOut, $wgMessageCache, $wgRequest;
1453                 $fname = 'Article::delete';
1454                 $confirm = $wgRequest->getBool( 'wpConfirm' ) && $wgRequest->wasPosted();
1455                 $reason = $wgRequest->getText( 'wpReason' );
1456
1457                 # This code desperately needs to be totally rewritten
1458
1459                 # Check permissions
1460                 if ( ( ! $wgUser->isAllowed('delete') ) ) {
1461                         $wgOut->sysopRequired();
1462                         return;
1463                 }
1464                 if ( wfReadOnly() ) {
1465                         $wgOut->readOnlyPage();
1466                         return;
1467                 }
1468
1469                 # Better double-check that it hasn't been deleted yet!
1470                 $wgOut->setPagetitle( wfMsg( 'confirmdelete' ) );
1471                 if ( ( '' == trim( $this->mTitle->getText() ) )
1472                   or ( $this->mTitle->getArticleId() == 0 ) ) {
1473                         $wgOut->fatalError( wfMsg( 'cannotdelete' ) );
1474                         return;
1475                 }
1476
1477                 if ( $confirm ) {
1478                         $this->doDelete( $reason );
1479                         return;
1480                 }
1481
1482                 # determine whether this page has earlier revisions
1483                 # and insert a warning if it does
1484                 # we select the text because it might be useful below
1485                 $dbr =& $this->getDB();
1486                 $ns = $this->mTitle->getNamespace();
1487                 $title = $this->mTitle->getDBkey();
1488                 $old = $dbr->selectRow( 'old',
1489                         array( 'old_text', 'old_flags' ),
1490                         array(
1491                                 'old_namespace' => $ns,
1492                                 'old_title' => $title,
1493                         ), $fname, $this->getSelectOptions( array( 'ORDER BY' => 'inverse_timestamp' ) )
1494                 );
1495
1496                 if( $old !== false && !$confirm ) {
1497                         $skin=$wgUser->getSkin();
1498                         $wgOut->addHTML('<b>'.wfMsg('historywarning'));
1499                         $wgOut->addHTML( $skin->historyLink() .'</b>');
1500                 }
1501
1502                 # Fetch cur_text
1503                 $s = $dbr->selectRow( 'cur',
1504                         array( 'cur_text' ),
1505                         array(
1506                                 'cur_namespace' => $ns,
1507                                 'cur_title' => $title,
1508                         ), $fname, $this->getSelectOptions()
1509                 );
1510
1511                 if( $s !== false ) {
1512                         # if this is a mini-text, we can paste part of it into the deletion reason
1513
1514                         #if this is empty, an earlier revision may contain "useful" text
1515                         $blanked = false;
1516                         if($s->cur_text != '') {
1517                                 $text=$s->cur_text;
1518                         } else {
1519                                 if($old) {
1520                                         $text = Article::getRevisionText( $old );
1521                                         $blanked = true;
1522                                 }
1523
1524                         }
1525
1526                         $length=strlen($text);
1527
1528                         # this should not happen, since it is not possible to store an empty, new
1529                         # page. Let's insert a standard text in case it does, though
1530                         if($length == 0 && $reason === '') {
1531                                 $reason = wfMsg('exblank');
1532                         }
1533
1534                         if($length < 500 && $reason === '') {
1535
1536                                 # comment field=255, let's grep the first 150 to have some user
1537                                 # space left
1538                                 $text=substr($text,0,150);
1539                                 # let's strip out newlines and HTML tags
1540                                 $text=preg_replace('/\"/',"'",$text);
1541                                 $text=preg_replace('/\</','&lt;',$text);
1542                                 $text=preg_replace('/\>/','&gt;',$text);
1543                                 $text=preg_replace("/[\n\r]/",'',$text);
1544                                 if(!$blanked) {
1545                                         $reason=wfMsg('excontent'). " '".$text;
1546                                 } else {
1547                                         $reason=wfMsg('exbeforeblank') . " '".$text;
1548                                 }
1549                                 if($length>150) { $reason .= '...'; } # we've only pasted part of the text
1550                                 $reason.="'";
1551                         }
1552                 }
1553
1554                 return $this->confirmDelete( '', $reason );
1555         }
1556
1557         /**
1558          * Output deletion confirmation dialog
1559          */
1560         function confirmDelete( $par, $reason ) {
1561                 global $wgOut;
1562
1563                 wfDebug( "Article::confirmDelete\n" );
1564
1565                 $sub = htmlspecialchars( $this->mTitle->getPrefixedText() );
1566                 $wgOut->setSubtitle( wfMsg( 'deletesub', $sub ) );
1567                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
1568                 $wgOut->addWikiText( wfMsg( 'confirmdeletetext' ) );
1569
1570                 $formaction = $this->mTitle->escapeLocalURL( 'action=delete' . $par );
1571
1572                 $confirm = htmlspecialchars( wfMsg( 'confirm' ) );
1573                 $check = htmlspecialchars( wfMsg( 'confirmcheck' ) );
1574                 $delcom = htmlspecialchars( wfMsg( 'deletecomment' ) );
1575
1576                 $wgOut->addHTML( "
1577 <form id='deleteconfirm' method='post' action=\"{$formaction}\">
1578         <table border='0'>
1579                 <tr>
1580                         <td align='right'>
1581                                 <label for='wpReason'>{$delcom}:</label>
1582                         </td>
1583                         <td align='left'>
1584                                 <input type='text' size='60' name='wpReason' id='wpReason' value=\"" . htmlspecialchars( $reason ) . "\" />
1585                         </td>
1586                 </tr>
1587                 <tr>
1588                         <td>&nbsp;</td>
1589                 </tr>
1590                 <tr>
1591                         <td align='right'>
1592                                 <input type='checkbox' name='wpConfirm' value='1' id='wpConfirm' />
1593                         </td>
1594                         <td>
1595                                 <label for='wpConfirm'>{$check}</label>
1596                         </td>
1597                 </tr>
1598                 <tr>
1599                         <td>&nbsp;</td>
1600                         <td>
1601                                 <input type='submit' name='wpConfirmB' value=\"{$confirm}\" />
1602                         </td>
1603                 </tr>
1604         </table>
1605 </form>\n" );
1606
1607                 $wgOut->returnToMain( false );
1608         }
1609
1610
1611         /**
1612          * Perform a deletion and output success or failure messages
1613          */
1614         function doDelete( $reason ) {
1615                 global $wgOut, $wgUser, $wgContLang;
1616                 $fname = 'Article::doDelete';
1617                 wfDebug( $fname."\n" );
1618
1619                 if (wfRunHooks('ArticleDelete', $this, $wgUser, $reason)) {
1620                         if ( $this->doDeleteArticle( $reason ) ) {
1621                                 $deleted = $this->mTitle->getPrefixedText();
1622
1623                                 $wgOut->setPagetitle( wfMsg( 'actioncomplete' ) );
1624                                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
1625
1626                                 $sk = $wgUser->getSkin();
1627                                 $loglink = $sk->makeKnownLink( $wgContLang->getNsText( NS_PROJECT ) .
1628                                                                                            ':' . wfMsgForContent( 'dellogpage' ),
1629                                                                                            wfMsg( 'deletionlog' ) );
1630
1631                                 $text = wfMsg( 'deletedtext', $deleted, $loglink );
1632
1633                                 $wgOut->addHTML( '<p>' . $text . "</p>\n" );
1634                                 $wgOut->returnToMain( false );
1635                                 wfRunHooks('ArticleDeleteComplete', $this, $wgUser, $reason);
1636                         } else {
1637                                 $wgOut->fatalError( wfMsg( 'cannotdelete' ) );
1638                         }
1639                 }
1640         }
1641
1642         /**
1643          * Back-end article deletion
1644          * Deletes the article with database consistency, writes logs, purges caches
1645          * Returns success
1646          */
1647         function doDeleteArticle( $reason ) {
1648                 global $wgUser;
1649                 global  $wgUseSquid, $wgDeferredUpdateList, $wgInternalServer;
1650
1651                 $fname = 'Article::doDeleteArticle';
1652                 wfDebug( $fname."\n" );
1653
1654                 $dbw =& wfGetDB( DB_MASTER );
1655                 $ns = $this->mTitle->getNamespace();
1656                 $t = $this->mTitle->getDBkey();
1657                 $id = $this->mTitle->getArticleID();
1658
1659                 if ( $t == '' || $id == 0 ) {
1660                         return false;
1661                 }
1662
1663                 $u = new SiteStatsUpdate( 0, 1, -$this->isCountable( $this->getContent( true ) ) );
1664                 array_push( $wgDeferredUpdateList, $u );
1665
1666                 $linksTo = $this->mTitle->getLinksTo();
1667
1668                 # Squid purging
1669                 if ( $wgUseSquid ) {
1670                         $urls = array(
1671                                 $this->mTitle->getInternalURL(),
1672                                 $this->mTitle->getInternalURL( 'history' )
1673                         );
1674                         foreach ( $linksTo as $linkTo ) {
1675                                 $urls[] = $linkTo->getInternalURL();
1676                         }
1677
1678                         $u = new SquidUpdate( $urls );
1679                         array_push( $wgDeferredUpdateList, $u );
1680
1681                 }
1682
1683                 # Client and file cache invalidation
1684                 Title::touchArray( $linksTo );
1685
1686                 # Move article and history to the "archive" table
1687                 $archiveTable = $dbw->tableName( 'archive' );
1688                 $oldTable = $dbw->tableName( 'old' );
1689                 $curTable = $dbw->tableName( 'cur' );
1690                 $recentchangesTable = $dbw->tableName( 'recentchanges' );
1691                 $linksTable = $dbw->tableName( 'links' );
1692                 $brokenlinksTable = $dbw->tableName( 'brokenlinks' );
1693
1694                 $dbw->insertSelect( 'archive', 'cur',
1695                         array(
1696                                 'ar_namespace' => 'cur_namespace',
1697                                 'ar_title' => 'cur_title',
1698                                 'ar_text' => 'cur_text',
1699                                 'ar_comment' => 'cur_comment',
1700                                 'ar_user' => 'cur_user',
1701                                 'ar_user_text' => 'cur_user_text',
1702                                 'ar_timestamp' => 'cur_timestamp',
1703                                 'ar_minor_edit' => 'cur_minor_edit',
1704                                 'ar_flags' => 0,
1705                         ), array(
1706                                 'cur_namespace' => $ns,
1707                                 'cur_title' => $t,
1708                         ), $fname
1709                 );
1710
1711                 $dbw->insertSelect( 'archive', 'old',
1712                         array(
1713                                 'ar_namespace' => 'old_namespace',
1714                                 'ar_title' => 'old_title',
1715                                 'ar_text' => 'old_text',
1716                                 'ar_comment' => 'old_comment',
1717                                 'ar_user' => 'old_user',
1718                                 'ar_user_text' => 'old_user_text',
1719                                 'ar_timestamp' => 'old_timestamp',
1720                                 'ar_minor_edit' => 'old_minor_edit',
1721                                 'ar_flags' => 'old_flags'
1722                         ), array(
1723                                 'old_namespace' => $ns,
1724                                 'old_title' => $t,
1725                         ), $fname
1726                 );
1727
1728                 # Now that it's safely backed up, delete it
1729
1730                 $dbw->delete( 'cur', array( 'cur_namespace' => $ns, 'cur_title' => $t ), $fname );
1731                 $dbw->delete( 'old', array( 'old_namespace' => $ns, 'old_title' => $t ), $fname );
1732                 $dbw->delete( 'recentchanges', array( 'rc_namespace' => $ns, 'rc_title' => $t ), $fname );
1733
1734                 # Finally, clean up the link tables
1735                 $t = $this->mTitle->getPrefixedDBkey();
1736
1737                 Article::onArticleDelete( $this->mTitle );
1738
1739                 # Insert broken links
1740                 $brokenLinks = array();
1741                 foreach ( $linksTo as $titleObj ) {
1742                         # Get article ID. Efficient because it was loaded into the cache by getLinksTo().
1743                         $linkID = $titleObj->getArticleID();
1744                         $brokenLinks[] = array( 'bl_from' => $linkID, 'bl_to' => $t );
1745                 }
1746                 $dbw->insert( 'brokenlinks', $brokenLinks, $fname, 'IGNORE' );
1747
1748                 # Delete live links
1749                 $dbw->delete( 'links', array( 'l_to' => $id ) );
1750                 $dbw->delete( 'links', array( 'l_from' => $id ) );
1751                 $dbw->delete( 'imagelinks', array( 'il_from' => $id ) );
1752                 $dbw->delete( 'brokenlinks', array( 'bl_from' => $id ) );
1753                 $dbw->delete( 'categorylinks', array( 'cl_from' => $id ) );
1754
1755                 # Log the deletion
1756                 $log = new LogPage( 'delete' );
1757                 $log->addEntry( 'delete', $this->mTitle, $reason );
1758
1759                 # Clear the cached article id so the interface doesn't act like we exist
1760                 $this->mTitle->resetArticleID( 0 );
1761                 $this->mTitle->mArticleID = 0;
1762                 return true;
1763         }
1764
1765         /**
1766          * Revert a modification
1767          */
1768         function rollback() {
1769                 global $wgUser, $wgOut, $wgRequest;
1770                 $fname = 'Article::rollback';
1771
1772                 if ( ! $wgUser->isAllowed('rollback') ) {
1773                         $wgOut->sysopRequired();
1774                         return;
1775                 }
1776                 if ( wfReadOnly() ) {
1777                         $wgOut->readOnlyPage( $this->getContent( true ) );
1778                         return;
1779                 }
1780                 $dbw =& wfGetDB( DB_MASTER );
1781
1782                 # Enhanced rollback, marks edits rc_bot=1
1783                 $bot = $wgRequest->getBool( 'bot' );
1784
1785                 # Replace all this user's current edits with the next one down
1786                 $tt = $this->mTitle->getDBKey();
1787                 $n = $this->mTitle->getNamespace();
1788
1789                 # Get the last editor, lock table exclusively
1790                 $s = $dbw->selectRow( 'cur',
1791                         array( 'cur_id','cur_user','cur_user_text','cur_comment' ),
1792                         array( 'cur_title' => $tt, 'cur_namespace' => $n ),
1793                         $fname, 'FOR UPDATE'
1794                 );
1795                 if( $s === false ) {
1796                         # Something wrong
1797                         $wgOut->addHTML( wfMsg( 'notanarticle' ) );
1798                         return;
1799                 }
1800                 $ut = $dbw->strencode( $s->cur_user_text );
1801                 $uid = $s->cur_user;
1802                 $pid = $s->cur_id;
1803
1804                 $from = str_replace( '_', ' ', $wgRequest->getVal( 'from' ) );
1805                 if( $from != $s->cur_user_text ) {
1806                         $wgOut->setPageTitle(wfmsg('rollbackfailed'));
1807                         $wgOut->addWikiText( wfMsg( 'alreadyrolled',
1808                                 htmlspecialchars( $this->mTitle->getPrefixedText()),
1809                                 htmlspecialchars( $from ),
1810                                 htmlspecialchars( $s->cur_user_text ) ) );
1811                         if($s->cur_comment != '') {
1812                                 $wgOut->addHTML(
1813                                         wfMsg('editcomment',
1814                                         htmlspecialchars( $s->cur_comment ) ) );
1815                         }
1816                         return;
1817                 }
1818
1819                 # Get the last edit not by this guy
1820                 $s = $dbw->selectRow( 'old',
1821                         array( 'old_text','old_user','old_user_text','old_timestamp','old_flags' ),
1822                         array(
1823                                 'old_namespace' => $n,
1824                                 'old_title' => $tt,
1825                                 "old_user <> {$uid} OR old_user_text <> '{$ut}'"
1826                         ), $fname, array( 'FOR UPDATE', 'USE INDEX' => 'name_title_timestamp' )
1827                 );
1828                 if( $s === false ) {
1829                         # Something wrong
1830                         $wgOut->setPageTitle(wfMsg('rollbackfailed'));
1831                         $wgOut->addHTML( wfMsg( 'cantrollback' ) );
1832                         return;
1833                 }
1834
1835                 if ( $bot ) {
1836                         # Mark all reverted edits as bot
1837                         $dbw->update( 'recentchanges',
1838                                 array( /* SET */
1839                                         'rc_bot' => 1
1840                                 ), array( /* WHERE */
1841                                         'rc_user' => $uid,
1842                                         "rc_timestamp > '{$s->old_timestamp}'",
1843                                 ), $fname
1844                         );
1845                 }
1846
1847                 # Save it!
1848                 $newcomment = wfMsg( 'revertpage', $s->old_user_text, $from );
1849                 $wgOut->setPagetitle( wfMsg( 'actioncomplete' ) );
1850                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
1851                 $wgOut->addHTML( '<h2>' . htmlspecialchars( $newcomment ) . "</h2>\n<hr />\n" );
1852                 $this->updateArticle( Article::getRevisionText( $s ), $newcomment, 1, $this->mTitle->userIsWatching(), $bot );
1853                 Article::onArticleEdit( $this->mTitle );
1854                 $wgOut->returnToMain( false );
1855         }
1856
1857
1858         /**
1859          * Do standard deferred updates after page view
1860          * @private
1861          */
1862         function viewUpdates() {
1863                 global $wgDeferredUpdateList;
1864
1865                 if ( 0 != $this->getID() ) {
1866                         global $wgDisableCounters;
1867                         if( !$wgDisableCounters ) {
1868                                 Article::incViewCount( $this->getID() );
1869                                 $u = new SiteStatsUpdate( 1, 0, 0 );
1870                                 array_push( $wgDeferredUpdateList, $u );
1871                         }
1872                 }
1873
1874                 # Update newtalk status if user is reading their own
1875                 # talk page
1876
1877                 global $wgUser;
1878                 if ($this->mTitle->getNamespace() == NS_USER_TALK &&
1879                         $this->mTitle->getText() == $wgUser->getName()) {
1880                         require_once( 'UserTalkUpdate.php' );
1881                         $u = new UserTalkUpdate( 0, $this->mTitle->getNamespace(), $this->mTitle->getDBkey(), false, false, false );
1882                 }
1883         }
1884
1885         /**
1886          * Do standard deferred updates after page edit.
1887          * Every 1000th edit, prune the recent changes table.
1888          * @private
1889          * @param string $text
1890          */
1891         function editUpdates( $text, $summary, $minoredit, $timestamp_of_pagechange) {
1892                 global $wgDeferredUpdateList, $wgDBname, $wgMemc;
1893                 global $wgMessageCache, $wgUser;
1894
1895                 wfSeedRandom();
1896                 if ( 0 == mt_rand( 0, 999 ) ) {
1897                         $dbw =& wfGetDB( DB_MASTER );
1898                         $cutoff = $dbw->timestamp( time() - ( 7 * 86400 ) );
1899                         $sql = "DELETE FROM recentchanges WHERE rc_timestamp < '{$cutoff}'";
1900                         $dbw->query( $sql );
1901                 }
1902                 $id = $this->getID();
1903                 $title = $this->mTitle->getPrefixedDBkey();
1904                 $shortTitle = $this->mTitle->getDBkey();
1905
1906                 $adj = $this->mCountAdjustment;
1907
1908                 if ( 0 != $id ) {
1909                         $u = new LinksUpdate( $id, $title );
1910                         array_push( $wgDeferredUpdateList, $u );
1911                         $u = new SiteStatsUpdate( 0, 1, $adj );
1912                         array_push( $wgDeferredUpdateList, $u );
1913                         $u = new SearchUpdate( $id, $title, $text );
1914                         array_push( $wgDeferredUpdateList, $u );
1915
1916                         # If this is another user's talk page,
1917                         # create a watchlist entry for this page
1918
1919                         if ($this->mTitle->getNamespace() == NS_USER_TALK &&
1920                                 $shortTitle != $wgUser->getName()) {
1921                                 require_once( 'UserTalkUpdate.php' );
1922                                 $u = new UserTalkUpdate( 1, $this->mTitle->getNamespace(), $shortTitle, $summary, $minoredit, $timestamp_of_pagechange);
1923                         }
1924
1925                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
1926                                 $wgMessageCache->replace( $shortTitle, $text );
1927                         }
1928                 }
1929         }
1930
1931         /**
1932          * @todo document this function
1933          * @private
1934          * @param string $oldid         Revision ID of this article revision
1935          */
1936         function setOldSubtitle( $oldid=0 ) {
1937                 global $wgLang, $wgOut, $wgUser;
1938
1939                 $td = $wgLang->timeanddate( $this->mTimestamp, true );
1940                 $sk = $wgUser->getSkin();
1941                 $lnk = $sk->makeKnownLinkObj ( $this->mTitle, wfMsg( 'currentrevisionlink' ) );
1942                 $prevlink = $sk->makeKnownLinkObj( $this->mTitle, wfMsg( 'previousrevision' ), 'direction=prev&oldid='.$oldid );
1943                 $nextlink = $sk->makeKnownLinkObj( $this->mTitle, wfMsg( 'nextrevision' ), 'direction=next&oldid='.$oldid );
1944                 $r = wfMsg( 'revisionasofwithlink', $td, $lnk, $prevlink, $nextlink );
1945                 $wgOut->setSubtitle( $r );
1946         }
1947
1948         /**
1949          * This function is called right before saving the wikitext,
1950          * so we can do things like signatures and links-in-context.
1951          *
1952          * @param string $text
1953          */
1954         function preSaveTransform( $text ) {
1955                 global $wgParser, $wgUser;
1956                 return $wgParser->preSaveTransform( $text, $this->mTitle, $wgUser, ParserOptions::newFromUser( $wgUser ) );
1957         }
1958
1959         /* Caching functions */
1960
1961         /**
1962          * checkLastModified returns true if it has taken care of all
1963          * output to the client that is necessary for this request.
1964          * (that is, it has sent a cached version of the page)
1965          */
1966         function tryFileCache() {
1967                 static $called = false;
1968                 if( $called ) {
1969                         wfDebug( " tryFileCache() -- called twice!?\n" );
1970                         return;
1971                 }
1972                 $called = true;
1973                 if($this->isFileCacheable()) {
1974                         $touched = $this->mTouched;
1975                         $cache = new CacheManager( $this->mTitle );
1976                         if($cache->isFileCacheGood( $touched )) {
1977                                 global $wgOut;
1978                                 wfDebug( " tryFileCache() - about to load\n" );
1979                                 $cache->loadFromFileCache();
1980                                 return true;
1981                         } else {
1982                                 wfDebug( " tryFileCache() - starting buffer\n" );
1983                                 ob_start( array(&$cache, 'saveToFileCache' ) );
1984                         }
1985                 } else {
1986                         wfDebug( " tryFileCache() - not cacheable\n" );
1987                 }
1988         }
1989
1990         /**
1991          * Check if the page can be cached
1992          * @return bool
1993          */
1994         function isFileCacheable() {
1995                 global $wgUser, $wgUseFileCache, $wgShowIPinHeader, $wgRequest;
1996                 extract( $wgRequest->getValues( 'action', 'oldid', 'diff', 'redirect', 'printable' ) );
1997
1998                 return $wgUseFileCache
1999                         and (!$wgShowIPinHeader)
2000                         and ($this->getID() != 0)
2001                         and ($wgUser->getId() == 0)
2002                         and (!$wgUser->getNewtalk())
2003                         and ($this->mTitle->getNamespace() != NS_SPECIAL )
2004                         and (empty( $action ) || $action == 'view')
2005                         and (!isset($oldid))
2006                         and (!isset($diff))
2007                         and (!isset($redirect))
2008                         and (!isset($printable))
2009                         and (!$this->mRedirectedFrom);
2010         }
2011
2012         /**
2013          * Loads cur_touched and returns a value indicating if it should be used
2014          *
2015          */
2016         function checkTouched() {
2017                 $fname = 'Article::checkTouched';
2018                 $id = $this->getID();
2019                 $dbr =& $this->getDB();
2020                 $s = $dbr->selectRow( 'page', array( 'page_touched', 'page_is_redirect' ),
2021                         array( 'page_id' => $id ), $fname, $this->getSelectOptions() );
2022                 if( $s !== false ) {
2023                         $this->mTouched = wfTimestamp( TS_MW, $s->page_touched );
2024                         return !$s->page_is_redirect;
2025                 } else {
2026                         return false;
2027                 }
2028         }
2029
2030         /**
2031          * Edit an article without doing all that other stuff
2032          *
2033          * @param string $text text submitted
2034          * @param string $comment comment submitted
2035          * @param integer $minor whereas it's a minor modification
2036          */
2037         function quickEdit( $text, $comment = '', $minor = 0 ) {
2038                 global $wgUser;
2039                 $fname = 'Article::quickEdit';
2040
2041                 #wfDebugDieBacktrace( "$fname called." );
2042
2043                 wfProfileIn( $fname );
2044
2045                 $dbw =& wfGetDB( DB_MASTER );
2046                 $ns = $this->mTitle->getNamespace();
2047                 $dbkey = $this->mTitle->getDBkey();
2048                 $encDbKey = $dbw->strencode( $dbkey );
2049                 $timestamp = wfTimestampNow();
2050                 # insert new text
2051                 $dbw->insert( 'text', array(
2052                                 'old_text' => $text,
2053                                 'old_flags' => "" ), $fname );
2054                 $text_id = $dbw->insertID();
2055
2056                 # update page
2057                 $dbw->update( 'page', array(
2058                         'page_is_new' => 0,
2059                         'page_touched' => $timestamp,
2060                         'page_is_redirect' => $this->isRedirect( $text ) ? 1 : 0,
2061                         'page_latest' => $text_id ),
2062                         array( 'page_namespace' => $ns, 'page_title' => $dbkey ), $fname );
2063                 # Retrieve page ID
2064                 $page_id = $dbw->selectField( 'page', 'page_id', array( 'page_namespace' => $ns, 'page_title' => $dbkey ), $fname );
2065
2066                 # update revision
2067                 $dbw->insert( 'revision', array(
2068                         'rev_id' => $text_id,
2069                         'rev_page' => $page_id,
2070                         'rev_comment' => $comment,
2071                         'rev_user' => $wgUser->getID(),
2072                         'rev_user_text' => $wgUser->getName(),
2073                         'rev_timestamp' => $timestamp,
2074                         'inverse_timestamp' => wfInvertTimestamp( $timestamp ),
2075                         'rev_minor_edit' => intval($minor) ),
2076                         $fname );
2077 /*
2078                 # Save to history
2079                 $dbw->insertSelect( 'old', 'cur',
2080                         array(
2081                                 'old_namespace' => 'cur_namespace',
2082                                 'old_title' => 'cur_title',
2083                                 'old_text' => 'cur_text',
2084                                 'old_comment' => 'cur_comment',
2085                                 'old_user' => 'cur_user',
2086                                 'old_user_text' => 'cur_user_text',
2087                                 'old_timestamp' => 'cur_timestamp',
2088                                 'inverse_timestamp' => '99999999999999-cur_timestamp',
2089                         ), array(
2090                                 'cur_namespace' => $ns,
2091                                 'cur_title' => $dbkey,
2092                         ), $fname
2093                 );
2094
2095                 # Use the affected row count to determine if the article is new
2096                 $numRows = $dbw->affectedRows();
2097
2098                 # Make an array of fields to be inserted
2099                 $fields = array(
2100                         'cur_text' => $text,
2101                         'cur_timestamp' => $timestamp,
2102                         'cur_user' => $wgUser->getID(),
2103                         'cur_user_text' => $wgUser->getName(),
2104                         'inverse_timestamp' => wfInvertTimestamp( $timestamp ),
2105                         'cur_comment' => $comment,
2106                         'cur_is_redirect' => $this->isRedirect( $text ) ? 1 : 0,
2107                         'cur_minor_edit' => intval($minor),
2108                         'cur_touched' => $dbw->timestamp($timestamp),
2109                 );
2110
2111                 if ( $numRows ) {
2112                         # Update article
2113                         $fields['cur_is_new'] = 0;
2114                         $dbw->update( 'cur', $fields, array( 'cur_namespace' => $ns, 'cur_title' => $dbkey ), $fname );
2115                 } else {
2116                         # Insert new article
2117                         $fields['cur_is_new'] = 1;
2118                         $fields['cur_namespace'] = $ns;
2119                         $fields['cur_title'] = $dbkey;
2120                         $fields['cur_random'] = $rand = wfRandom();
2121                         $dbw->insert( 'cur', $fields, $fname );
2122                 }
2123 */
2124                 wfProfileOut( $fname );
2125         }
2126
2127         /**
2128          * Used to increment the view counter
2129          *
2130          * @static
2131          * @param integer $id article id
2132          */
2133         function incViewCount( $id ) {
2134                 $id = intval( $id );
2135                 global $wgHitcounterUpdateFreq;
2136
2137                 $dbw =& wfGetDB( DB_MASTER );
2138                 $pageTable = $dbw->tableName( 'page' );
2139                 $hitcounterTable = $dbw->tableName( 'hitcounter' );
2140                 $acchitsTable = $dbw->tableName( 'acchits' );
2141
2142                 if( $wgHitcounterUpdateFreq <= 1 ){ //
2143                         $dbw->query( "UPDATE $pageTable SET page_counter = page_counter + 1 WHERE page_id = $id" );
2144                         return;
2145                 }
2146
2147                 # Not important enough to warrant an error page in case of failure
2148                 $oldignore = $dbw->ignoreErrors( true );
2149
2150                 $dbw->query( "INSERT INTO $hitcounterTable (hc_id) VALUES ({$id})" );
2151
2152                 $checkfreq = intval( $wgHitcounterUpdateFreq/25 + 1 );
2153                 if( (rand() % $checkfreq != 0) or ($dbw->lastErrno() != 0) ){
2154                         # Most of the time (or on SQL errors), skip row count check
2155                         $dbw->ignoreErrors( $oldignore );
2156                         return;
2157                 }
2158
2159                 $res = $dbw->query("SELECT COUNT(*) as n FROM $hitcounterTable");
2160                 $row = $dbw->fetchObject( $res );
2161                 $rown = intval( $row->n );
2162                 if( $rown >= $wgHitcounterUpdateFreq ){
2163                         wfProfileIn( 'Article::incViewCount-collect' );
2164                         $old_user_abort = ignore_user_abort( true );
2165
2166                         $dbw->query("LOCK TABLES $hitcounterTable WRITE");
2167                         $dbw->query("CREATE TEMPORARY TABLE $acchitsTable TYPE=HEAP ".
2168                                 "SELECT hc_id,COUNT(*) AS hc_n FROM $hitcounterTable ".
2169                                 'GROUP BY hc_id');
2170                         $dbw->query("DELETE FROM $hitcounterTable");
2171                         $dbw->query('UNLOCK TABLES');
2172                         $dbw->query("UPDATE $curTable,$acchitsTable SET cur_counter=cur_counter + hc_n ".
2173                                 'WHERE cur_id = hc_id');
2174                         $dbw->query("DROP TABLE $acchitsTable");
2175
2176                         ignore_user_abort( $old_user_abort );
2177                         wfProfileOut( 'Article::incViewCount-collect' );
2178                 }
2179                 $dbw->ignoreErrors( $oldignore );
2180         }
2181
2182         /**#@+
2183          * The onArticle*() functions are supposed to be a kind of hooks
2184          * which should be called whenever any of the specified actions
2185          * are done.
2186          *
2187          * This is a good place to put code to clear caches, for instance.
2188          *
2189          * This is called on page move and undelete, as well as edit
2190          * @static
2191          * @param $title_obj a title object
2192          */
2193
2194         function onArticleCreate($title_obj) {
2195                 global $wgUseSquid, $wgDeferredUpdateList;
2196
2197                 $titles = $title_obj->getBrokenLinksTo();
2198
2199                 # Purge squid
2200                 if ( $wgUseSquid ) {
2201                         $urls = $title_obj->getSquidURLs();
2202                         foreach ( $titles as $linkTitle ) {
2203                                 $urls[] = $linkTitle->getInternalURL();
2204                         }
2205                         $u = new SquidUpdate( $urls );
2206                         array_push( $wgDeferredUpdateList, $u );
2207                 }
2208
2209                 # Clear persistent link cache
2210                 LinkCache::linksccClearBrokenLinksTo( $title_obj->getPrefixedDBkey() );
2211         }
2212
2213         function onArticleDelete($title_obj) {
2214                 LinkCache::linksccClearLinksTo( $title_obj->getArticleID() );
2215         }
2216         function onArticleEdit($title_obj) {
2217                 LinkCache::linksccClearPage( $title_obj->getArticleID() );
2218         }
2219         /**#@-*/
2220
2221         /**
2222          * Info about this page
2223          */
2224         function info() {
2225                 global $wgUser, $wgTitle, $wgOut, $wgAllowPageInfo;
2226                 $fname = 'Article::info';
2227
2228                 if ( !$wgAllowPageInfo ) {
2229                         $wgOut->errorpage( 'nosuchaction', 'nosuchactiontext' );
2230                         return;
2231                 }
2232
2233                 $dbr =& $this->getDB();
2234
2235                 $basenamespace = $wgTitle->getNamespace() & (~1);
2236                 $cur_clause = array( 'cur_title' => $wgTitle->getDBkey(), 'cur_namespace' => $basenamespace );
2237                 $old_clause = array( 'old_title' => $wgTitle->getDBkey(), 'old_namespace' => $basenamespace );
2238                 $wl_clause  = array( 'wl_title' => $wgTitle->getDBkey(), 'wl_namespace' => $basenamespace );
2239                 $fullTitle = $wgTitle->makeName($basenamespace, $wgTitle->getDBKey());
2240                 $wgOut->setPagetitle(  $fullTitle );
2241                 $wgOut->setSubtitle( wfMsg( 'infosubtitle' ));
2242
2243                 # first, see if the page exists at all.
2244                 $exists = $dbr->selectField( 'cur', 'COUNT(*)', $cur_clause, $fname, $this->getSelectOptions() );
2245                 if ($exists < 1) {
2246                         $wgOut->addHTML( wfMsg('noarticletext') );
2247                 } else {
2248                         $numwatchers = $dbr->selectField( 'watchlist', 'COUNT(*)', $wl_clause, $fname,
2249                                 $this->getSelectOptions() );
2250                         $wgOut->addHTML( "<ul><li>" . wfMsg("numwatchers", $numwatchers) . '</li>' );
2251                         $old = $dbr->selectField( 'old', 'COUNT(*)', $old_clause, $fname, $this->getSelectOptions() );
2252                         $wgOut->addHTML( "<li>" . wfMsg('numedits', $old + 1) . '</li>');
2253
2254                         # to find number of distinct authors, we need to do some
2255                         # funny stuff because of the cur/old table split:
2256                         # - first, find the name of the 'cur' author
2257                         # - then, find the number of *other* authors in 'old'
2258
2259                         # find 'cur' author
2260                         $cur_author = $dbr->selectField( 'cur', 'cur_user_text', $cur_clause, $fname,
2261                                 $this->getSelectOptions() );
2262
2263                         # find number of 'old' authors excluding 'cur' author
2264                         $authors = $dbr->selectField( 'old', 'COUNT(DISTINCT old_user_text)',
2265                                 $old_clause + array( 'old_user_text<>' . $dbr->addQuotes( $cur_author ) ), $fname,
2266                                 $this->getSelectOptions() ) + 1;
2267
2268                         # now for the Talk page ...
2269                         $cur_clause = array( 'cur_title' => $wgTitle->getDBkey(), 'cur_namespace' => $basenamespace+1 );
2270                         $old_clause = array( 'old_title' => $wgTitle->getDBkey(), 'old_namespace' => $basenamespace+1 );
2271
2272                         # does it exist?
2273                         $exists = $dbr->selectField( 'cur', 'COUNT(*)', $cur_clause, $fname, $this->getSelectOptions() );
2274
2275                         # number of edits
2276                         if ($exists > 0) {
2277                                 $old = $dbr->selectField( 'old', 'COUNT(*)', $old_clause, $fname, $this->getSelectOptions() );
2278                                 $wgOut->addHTML( '<li>' . wfMsg("numtalkedits", $old + 1) . '</li>');
2279                         }
2280                         $wgOut->addHTML( '<li>' . wfMsg("numauthors", $authors) . '</li>' );
2281
2282                         # number of authors
2283                         if ($exists > 0) {
2284                                 $cur_author = $dbr->selectField( 'cur', 'cur_user_text', $cur_clause, $fname,
2285                                         $this->getSelectOptions() );
2286                                 $authors = $dbr->selectField( 'cur', 'COUNT(DISTINCT old_user_text)',
2287                                         $old_clause + array( 'old_user_text<>' . $dbr->addQuotes( $cur_author ) ),
2288                                         $fname, $this->getSelectOptions() );
2289
2290                                 $wgOut->addHTML( '<li>' . wfMsg('numtalkauthors', $authors) . '</li></ul>' );
2291                         }
2292                 }
2293         }
2294 }
2295
2296 /**
2297  * Check whether an article is a stub
2298  *
2299  * @public
2300  * @param integer $articleID    ID of the article that is to be checked
2301  */
2302 function wfArticleIsStub( $articleID ) {
2303         global $wgUser;
2304         $fname = 'wfArticleIsStub';
2305
2306         $threshold = $wgUser->getOption('stubthreshold') ;
2307         if ( $threshold > 0 ) {
2308                 $dbr =& wfGetDB( DB_SLAVE );
2309                 $s = $dbr->selectRow( array('page', 'text'),
2310                         array( 'LENGTH(old_text) AS len', 'page_namespace', 'page_is_redirect' ),
2311                         array( 'page_id' => $articleID, "page.page_latest=text.old_id" ),
2312                         $fname ) ;
2313                 if ( $s == false OR $s->page_is_redirect OR $s->page_namespace != 0 ) {
2314                         return false;
2315                 }
2316                 $size = $s->len;
2317                 return ( $size < $threshold );
2318         }
2319         return false;
2320 }
2321
2322 ?>