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 require_once( 'Revision.php' );
  12
  13 $wgArticleCurContentFields = false;
  14 $wgArticleOldContentFields = false;
  15
  16 /**
  17  * Class representing a Wikipedia article and history.
  18  *
  19  * See design.doc for an overview.
  20  * Note: edit user interface and cache support functions have been
  21  * moved to separate EditPage and CacheManager classes.
  22  *
  23  * @package MediaWiki
  24  */
  25 class Article {
  26         /**#@+
  27          * @access private
  28          */
  29         var $mContent, $mContentLoaded;
  30         var $mUser, $mTimestamp, $mUserText;
  31         var $mCounter, $mComment, $mCountAdjustment;
  32         var $mMinorEdit, $mRedirectedFrom;
  33         var $mTouched, $mFileCache, $mTitle;
  34         var $mId, $mTable;
  35         var $mForUpdate;
  36         var $mOldId;
  37         /**#@-*/
  38
  39         /**
  40          * Constructor and clear the article
  41          * @param mixed &$title
  42          */
  43         function Article( &$title ) {
  44                 $this->mTitle =& $title;
  45                 $this->clear();
  46         }
  47
  48         /**
  49          * get the title object of the article
  50          * @public
  51          */
  52         function getTitle() {
  53                 return $this->mTitle;
  54         }
  55
  56         /**
  57           * Clear the object
  58           * @private
  59           */
  60         function clear() {
  61                 $this->mContentLoaded = false;
  62                 $this->mCurID = $this->mUser = $this->mCounter = -1; # Not loaded
  63                 $this->mRedirectedFrom = $this->mUserText =
  64                 $this->mTimestamp = $this->mComment = $this->mFileCache = '';
  65                 $this->mCountAdjustment = 0;
  66                 $this->mTouched = '19700101000000';
  67                 $this->mForUpdate = false;
  68         }
  69
  70         /**
  71          * Note that getContent/loadContent may follow redirects if
  72          * not told otherwise, and so may cause a change to mTitle.
  73          *
  74          * @param $noredir
  75          * @return Return the text of this revision
  76         */
  77         function getContent( $noredir ) {
  78                 global $wgRequest;
  79
  80                 # Get variables from query string :P
  81                 $action = $wgRequest->getText( 'action', 'view' );
  82                 $section = $wgRequest->getText( 'section' );
  83
  84                 $fname =  'Article::getContent';
  85                 wfProfileIn( $fname );
  86
  87                 if ( 0 == $this->getID() ) {
  88                         if ( 'edit' == $action ) {
  89                                 wfProfileOut( $fname );
  90                                 return ''; # was "newarticletext", now moved above the box)
  91                         }
  92                         wfProfileOut( $fname );
  93                         return wfMsg( 'noarticletext' );
  94                 } else {
  95                         $this->loadContent( $noredir );
  96                         # check if we're displaying a [[User talk:x.x.x.x]] anonymous talk page
  97                         if ( $this->mTitle->getNamespace() == NS_USER_TALK &&
  98                           preg_match('/^\d{1,3}\.\d{1,3}.\d{1,3}\.\d{1,3}$/',$this->mTitle->getText()) &&
  99                           $action=='view'
 100                         ) {
 101                                 wfProfileOut( $fname );
 102                                 return $this->mContent . "\n" .wfMsg('anontalkpagetext');
 103                         } else {
 104                                 if($action=='edit') {
 105                                         if($section!='') {
 106                                                 if($section=='new') {
 107                                                         wfProfileOut( $fname );
 108                                                         return '';
 109                                                 }
 110
 111                                                 # strip NOWIKI etc. to avoid confusion (true-parameter causes HTML
 112                                                 # comments to be stripped as well)
 113                                                 $rv=$this->getSection($this->mContent,$section);
 114                                                 wfProfileOut( $fname );
 115                                                 return $rv;
 116                                         }
 117                                 }
 118                                 wfProfileOut( $fname );
 119                                 return $this->mContent;
 120                         }
 121                 }
 122         }
 123
 124         /**
 125          * This function returns the text of a section, specified by a number ($section).
 126          * A section is text under a heading like == Heading == or <h1>Heading</h1>, or
 127          * the first section before any such heading (section 0).
 128          *
 129          * If a section contains subsections, these are also returned.
 130          *
 131          * @param string $text text to look in
 132          * @param integer $section section number
 133          * @return string text of the requested section
 134          */
 135         function getSection($text,$section) {
 136
 137                 # strip NOWIKI etc. to avoid confusion (true-parameter causes HTML
 138                 # comments to be stripped as well)
 139                 $striparray=array();
 140                 $parser=new Parser();
 141                 $parser->mOutputType=OT_WIKI;
 142                 $striptext=$parser->strip($text, $striparray, true);
 143
 144                 # now that we can be sure that no pseudo-sections are in the source,
 145                 # split it up by section
 146                 $secs =
 147                   preg_split(
 148                   '/(^=+.+?=+|^<h[1-6].*?' . '>.*?<\/h[1-6].*?' . '>)(?!\S)/mi',
 149                   $striptext, -1,
 150                   PREG_SPLIT_DELIM_CAPTURE);
 151                 if($section==0) {
 152                         $rv=$secs[0];
 153                 } else {
 154                         $headline=$secs[$section*2-1];
 155                         preg_match( '/^(=+).+?=+|^<h([1-6]).*?' . '>.*?<\/h[1-6].*?' . '>(?!\S)/mi',$headline,$matches);
 156                         $hlevel=$matches[1];
 157
 158                         # translate wiki heading into level
 159                         if(strpos($hlevel,'=')!==false) {
 160                                 $hlevel=strlen($hlevel);
 161                         }
 162
 163                         $rv=$headline. $secs[$section*2];
 164                         $count=$section+1;
 165
 166                         $break=false;
 167                         while(!empty($secs[$count*2-1]) && !$break) {
 168
 169                                 $subheadline=$secs[$count*2-1];
 170                                 preg_match( '/^(=+).+?=+|^<h([1-6]).*?' . '>.*?<\/h[1-6].*?' . '>(?!\S)/mi',$subheadline,$matches);
 171                                 $subhlevel=$matches[1];
 172                                 if(strpos($subhlevel,'=')!==false) {
 173                                         $subhlevel=strlen($subhlevel);
 174                                 }
 175                                 if($subhlevel > $hlevel) {
 176                                         $rv.=$subheadline.$secs[$count*2];
 177                                 }
 178                                 if($subhlevel <= $hlevel) {
 179                                         $break=true;
 180                                 }
 181                                 $count++;
 182
 183                         }
 184                 }
 185                 # reinsert stripped tags
 186                 $rv=$parser->unstrip($rv,$striparray);
 187                 $rv=$parser->unstripNoWiki($rv,$striparray);
 188                 $rv=trim($rv);
 189                 return $rv;
 190
 191         }
 192
 193         /**
 194          * Return an array of the columns of the "cur"-table
 195          */
 196         function getContentFields() {
 197                 return $wgArticleContentFields = array(
 198                   'old_text','old_flags',
 199                   'rev_timestamp','rev_user', 'rev_user_text', 'rev_comment','page_counter',
 200                   'page_namespace', 'page_title', 'page_restrictions','page_touched','page_is_redirect' );
 201         }
 202
 203         /**
 204          * Return the oldid of the article that is to be shown.
 205          * For requests with a "direction", this is not the oldid of the
 206          * query
 207          */
 208         function getOldID() {
 209                 global $wgRequest, $wgOut;
 210                 static $lastid;
 211
 212                 if ( isset( $lastid ) ) {
 213                         return $lastid;
 214                 }
 215                 # Query variables :P
 216                 $oldid = $wgRequest->getVal( 'oldid' );
 217                 if ( isset( $oldid ) ) {
 218                         $dbr =& $this->getDB();
 219                         $oldid = IntVal( $oldid );
 220                         if ( $wgRequest->getVal( 'direction' ) == 'next' ) {
 221                                 $nextid = $this->mTitle->getNextRevisionID( $oldid );
 222                                 if ( $nextid  ) {
 223                                         $oldid = $nextid;
 224                                 } else {
 225                                         $wgOut->redirect( $this->mTitle->getFullURL( 'redirect=no' ) );
 226                                 }
 227                         } elseif ( $wgRequest->getVal( 'direction' ) == 'prev' ) {
 228                                 $previd = $this->mTitle->getPreviousRevisionID( $oldid );
 229                                 if ( $previd ) {
 230                                         $oldid = $previd;
 231                                 } else {
 232                                         # TODO
 233                                 }
 234                         }
 235                         $lastid = $oldid;
 236                 }
 237                 return @$oldid; # "@" to be able to return "unset" without PHP complaining
 238         }
 239
 240
 241         /**
 242          * Load the revision (including cur_text) into this object
 243          */
 244         function loadContent( $noredir = false ) {
 245                 global $wgOut, $wgRequest;
 246
 247                 if ( $this->mContentLoaded ) return;
 248
 249                 $dbr =& $this->getDB();
 250                 # Query variables :P
 251                 $oldid = $this->getOldID();
 252                 $redirect = $wgRequest->getVal( 'redirect' );
 253
 254                 $fname = 'Article::loadContent';
 255
 256                 # Pre-fill content with error message so that if something
 257                 # fails we'll have something telling us what we intended.
 258
 259                 $t = $this->mTitle->getPrefixedText();
 260
 261                 $noredir = $noredir || ($wgRequest->getVal( 'redirect' ) == 'no');
 262                 $this->mOldId = $oldid;
 263                 $this->fetchContent( $oldid, $noredir, true );
 264         }
 265
 266         /**
 267          * Get text of an article from database
 268          * @param int $oldid 0 for whatever the latest revision is
 269          * @param bool $noredir Set to true to avoid following redirects
 270          * @param bool $globalTitle Set to true to change the global $wgTitle object when following redirects or other unexpected title changes
 271          * @return string
 272          */
 273         function fetchContent( $oldid = 0, $noredir = false, $globalTitle = false ) {
 274                 if ( $this->mContentLoaded ) {
 275                         return $this->mContent;
 276                 }
 277                 $dbr =& $this->getDB();
 278                 $fname = 'Article::fetchContent';
 279
 280                 # Pre-fill content with error message so that if something
 281                 # fails we'll have something telling us what we intended.
 282                 $t = $this->mTitle->getPrefixedText();
 283                 if( $oldid ) {
 284                         $t .= ',oldid='.$oldid;
 285                 }
 286                 if( isset( $redirect ) ) {
 287                         $redirect = ($redirect == 'no') ? 'no' : 'yes';
 288                         $t .= ',redirect='.$redirect;
 289                 }
 290                 $this->mContent = wfMsg( 'missingarticle', $t );
 291
 292                 if( !$oldid ) {
 293                         # Retrieve current version
 294                         $id = $this->getID();
 295                         if ( 0 == $id ) {
 296                                 return false;
 297                         }
 298
 299                         $s = $dbr->selectRow( array( 'text', 'revision', 'page' ),
 300                                 $this->getContentFields(),
 301                                 "page_id='$id' AND rev_page=page_id AND rev_id=page_latest AND old_id=rev_id",
 302                                 $fname, $this->getSelectOptions() );
 303                 } else {
 304                         # Historical revision
 305                         $s = $dbr->selectRow( array( 'text', 'revision', 'page' ),
 306                                 $this->getContentFields(),
 307                                 "rev_page=page_id AND rev_id='$oldid' AND old_id=rev_id",
 308                                 $fname, $this->getSelectOptions() );
 309                 }
 310                 if ( $s === false ) {
 311                         return false;
 312                 }
 313
 314                 # If we got a redirect, follow it (unless we've been told
 315                 # not to by either the function parameter or the query
 316                 if ( !$oldid && !$noredir ) {
 317                         $rt = Title::newFromRedirect( Revision::getRevisionText( $s ) );
 318                         # process if title object is valid and not special:userlogout
 319                         if ( $rt && ! ( $rt->getNamespace() == NS_SPECIAL && $rt->getText() == 'Userlogout' ) ) {
 320                                 # Gotta hand redirects to special pages differently:
 321                                 # Fill the HTTP response "Location" header and ignore
 322                                 # the rest of the page we're on.
 323                                 if( $globalTitle ) {
 324                                         global $wgOut;
 325                                         if ( $rt->getInterwiki() != '' ) {
 326                                                 $wgOut->redirect( $rt->getFullURL() ) ;
 327                                                 return false;
 328                                         }
 329                                         if ( $rt->getNamespace() == NS_SPECIAL ) {
 330                                                 $wgOut->redirect( $rt->getFullURL() );
 331                                                 return false;
 332                                         }
 333                                 }
 334                                 $rid = $rt->getArticleID();
 335                                 if ( 0 != $rid ) {
 336                                         $redirRow = $dbr->selectRow( array( 'text', 'revision', 'page' ),
 337                                                 $this->getContentFields(),
 338                                                 "page_id='$rid' AND rev_page=page_id AND rev_id=page_latest AND old_id=rev_id",
 339                                                 $fname, $this->getSelectOptions() );
 340
 341                                         if ( $redirRow !== false ) {
 342                                                 $this->mRedirectedFrom = $this->mTitle->getPrefixedText();
 343                                                 $this->mTitle = $rt;
 344                                                 $s = $redirRow;
 345                                         }
 346                                 }
 347                         }
 348                 }
 349
 350                 # if the title's different from expected, update...
 351                 if( $globalTitle &&
 352                         ( $this->mTitle->getNamespace() != $s->page_namespace ||
 353                         $this->mTitle->getDBkey() != $s->page_title ) ) {
 354                         $oldTitle = Title::makeTitle( $s->page_namesapce, $s->page_title );
 355                         $this->mTitle = $oldTitle;
 356                         global $wgTitle;
 357                         $wgTitle = $oldTitle;
 358                 }
 359
 360                 # Back to the business at hand...
 361                 $this->mCounter = $s->page_counter;
 362                 $this->mTitle->mRestrictions = explode( ',', trim( $s->page_restrictions ) );
 363                 $this->mTitle->mRestrictionsLoaded = true;
 364                 $this->mTouched = wfTimestamp( TS_MW, $s->page_touched );
 365
 366                 $this->mContent = Revision::getRevisionText( $s );
 367
 368                 $this->mUser = $s->rev_user;
 369                 $this->mUserText = $s->rev_user_text;
 370                 $this->mComment = $s->rev_comment;
 371                 $this->mTimestamp = wfTimestamp( TS_MW, $s->rev_timestamp );
 372
 373                 $this->mContentLoaded = true;
 374                 return $this->mContent;
 375         }
 376
 377         /**
 378          * Gets the article text without using so many damn globals
 379          * Returns false on error
 380          *
 381          * @param integer $oldid
 382          */
 383         function getContentWithoutUsingSoManyDamnGlobals( $oldid = 0, $noredir = false ) {
 384                 return $this->fetchContent( $oldid, $noredir, false );
 385         }
 386
 387         /**
 388          * Read/write accessor to select FOR UPDATE
 389          */
 390         function forUpdate( $x = NULL ) {
 391                 return wfSetVar( $this->mForUpdate, $x );
 392         }
 393
 394         /**
 395          * Get the database which should be used for reads
 396          */
 397         function &getDB() {
 398                 if ( $this->mForUpdate ) {
 399                         return wfGetDB( DB_MASTER );
 400                 } else {
 401                         return wfGetDB( DB_SLAVE );
 402                 }
 403         }
 404
 405         /**
 406          * Get options for all SELECT statements
 407          * Can pass an option array, to which the class-wide options will be appended
 408          */
 409         function getSelectOptions( $options = '' ) {
 410                 if ( $this->mForUpdate ) {
 411                         if ( is_array( $options ) ) {
 412                                 $options[] = 'FOR UPDATE';
 413                         } else {
 414                                 $options = 'FOR UPDATE';
 415                         }
 416                 }
 417                 return $options;
 418         }
 419
 420         /**
 421          * Return the Article ID
 422          */
 423         function getID() {
 424                 if( $this->mTitle ) {
 425                         return $this->mTitle->getArticleID();
 426                 } else {
 427                         return 0;
 428                 }
 429         }
 430
 431         /**
 432          * Get the view count for this article
 433          */
 434         function getCount() {
 435                 if ( -1 == $this->mCounter ) {
 436                         $id = $this->getID();
 437                         $dbr =& $this->getDB();
 438                         $this->mCounter = $dbr->selectField( 'page', 'page_counter', array( 'page_id' => $id ),
 439                                 'Article::getCount', $this->getSelectOptions() );
 440                 }
 441                 return $this->mCounter;
 442         }
 443
 444         /**
 445          * Would the given text make this article a "good" article (i.e.,
 446          * suitable for including in the article count)?
 447          */
 448         function isCountable( $text ) {
 449                 global $wgUseCommaCount;
 450
 451                 if ( 0 != $this->mTitle->getNamespace() ) { return 0; }
 452                 if ( $this->isRedirect( $text ) ) { return 0; }
 453                 $token = ($wgUseCommaCount ? ',' : '[[' );
 454                 if ( false === strstr( $text, $token ) ) { return 0; }
 455                 return 1;
 456         }
 457
 458         /**
 459          * Tests if the article text represents a redirect
 460          */
 461         function isRedirect( $text = false ) {
 462                 if ( $text === false ) {
 463                         $this->loadContent();
 464                         $titleObj = Title::newFromRedirect( $this->mText );
 465                 } else {
 466                         $titleObj = Title::newFromRedirect( $text );
 467                 }
 468                 return $titleObj !== NULL;
 469         }
 470
 471         /**
 472          * Loads everything except the text
 473          * This isn't necessary for all uses, so it's only done if needed.
 474          * @private
 475          */
 476         function loadLastEdit() {
 477                 global $wgOut;
 478
 479                 if ( -1 != $this->mUser )
 480                         return;
 481
 482                 $fname = 'Article::loadLastEdit';
 483
 484                 $dbr =& $this->getDB();
 485                 $s = $dbr->selectRow( array( 'revision', 'page') ,
 486                   array( 'rev_user','rev_user_text','rev_timestamp', 'rev_comment','rev_minor_edit' ),
 487                   array( 'page_id' => $this->getID(), 'page_latest=rev_id' ), $fname, $this->getSelectOptions() );
 488
 489                 if ( $s !== false ) {
 490                         $this->mUser = $s->rev_user;
 491                         $this->mUserText = $s->rev_user_text;
 492                         $this->mTimestamp = wfTimestamp(TS_MW,$s->rev_timestamp);
 493                         $this->mComment = $s->rev_comment;
 494                         $this->mMinorEdit = $s->rev_minor_edit;
 495                 }
 496         }
 497
 498         function getTimestamp() {
 499                 $this->loadLastEdit();
 500                 return $this->mTimestamp;
 501         }
 502
 503         function getUser() {
 504                 $this->loadLastEdit();
 505                 return $this->mUser;
 506         }
 507
 508         function getUserText() {
 509                 $this->loadLastEdit();
 510                 return $this->mUserText;
 511         }
 512
 513         function getComment() {
 514                 $this->loadLastEdit();
 515                 return $this->mComment;
 516         }
 517
 518         function getMinorEdit() {
 519                 $this->loadLastEdit();
 520                 return $this->mMinorEdit;
 521         }
 522
 523         function getContributors($limit = 0, $offset = 0) {
 524                 $fname = 'Article::getContributors';
 525
 526                 # XXX: this is expensive; cache this info somewhere.
 527
 528                 $title = $this->mTitle;
 529                 $contribs = array();
 530                 $dbr =& $this->getDB();
 531                 $revTable = $dbr->tableName( 'revision' );
 532                 $userTable = $dbr->tableName( 'user' );
 533                 $encDBkey = $dbr->addQuotes( $title->getDBkey() );
 534                 $ns = $title->getNamespace();
 535                 $user = $this->getUser();
 536                 $pageId = $this->getId();
 537
 538                 $sql = "SELECT rev_user, rev_user_text, user_real_name, MAX(rev_timestamp) as timestamp
 539                         FROM $revTable LEFT JOIN $userTable ON rev_user = user_id
 540                         WHERE rev_page = $pageId
 541                         AND rev_user != $user
 542                         GROUP BY rev_user, rev_user_text, user_real_name
 543                         ORDER BY timestamp DESC";
 544
 545                 if ($limit > 0) { $sql .= ' LIMIT '.$limit; }
 546                 $sql .= ' '. $this->getSelectOptions();
 547
 548                 $res = $dbr->query($sql, $fname);
 549
 550                 while ( $line = $dbr->fetchObject( $res ) ) {
 551                         $contribs[] = array($line->rev_user, $line->rev_user_text, $line->user_real_name);
 552                 }
 553
 554                 $dbr->freeResult($res);
 555                 return $contribs;
 556         }
 557
 558         /**
 559          * This is the default action of the script: just view the page of
 560          * the given title.
 561         */
 562         function view() {
 563                 global $wgUser, $wgOut, $wgRequest, $wgOnlySysopsCanPatrol, $wgLang;
 564                 global $wgLinkCache, $IP, $wgEnableParserCache, $wgStylePath, $wgUseRCPatrol;
 565                 global $wgEnotif;
 566                 $sk = $wgUser->getSkin();
 567
 568                 $fname = 'Article::view';
 569                 wfProfileIn( $fname );
 570                 # Get variables from query string
 571                 $oldid = $this->getOldID();
 572                 $diff = $wgRequest->getVal( 'diff' );
 573                 $rcid = $wgRequest->getVal( 'rcid' );
 574
 575                 $wgOut->setArticleFlag( true );
 576                 $wgOut->setRobotpolicy( 'index,follow' );
 577                 # If we got diff and oldid in the query, we want to see a
 578                 # diff page instead of the article.
 579
 580                 if ( !is_null( $diff ) ) {
 581                         require_once( 'DifferenceEngine.php' );
 582                         $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
 583                         $de = new DifferenceEngine( $oldid, $diff, $rcid );
 584                         $de->showDiffPage();
 585                         if( $diff == 0 ) {
 586                                 # Run view updates for current revision only
 587                                 $this->viewUpdates();
 588                         }
 589                         wfProfileOut( $fname );
 590                         return;
 591                 }
 592                 if ( empty( $oldid ) && $this->checkTouched() ) {
 593                         if( $wgOut->checkLastModified( $this->mTouched ) ){
 594                                 wfProfileOut( $fname );
 595                                 return;
 596                         } else if ( $this->tryFileCache() ) {
 597                                 # tell wgOut that output is taken care of
 598                                 $wgOut->disable();
 599                                 $this->viewUpdates();
 600                                 wfProfileOut( $fname );
 601                                 return;
 602                         }
 603                 }
 604                 # Should the parser cache be used?
 605                 if ( $wgEnableParserCache && intval($wgUser->getOption( 'stubthreshold' )) == 0 && empty( $oldid ) ) {
 606                         $pcache = true;
 607                 } else {
 608                         $pcache = false;
 609                 }
 610
 611                 $outputDone = false;
 612                 if ( $pcache ) {
 613                         if ( $wgOut->tryParserCache( $this, $wgUser ) ) {
 614                                 $outputDone = true;
 615                         }
 616                 }
 617                 if ( !$outputDone ) {
 618                         $text = $this->getContent( false ); # May change mTitle by following a redirect
 619
 620                         # Another whitelist check in case oldid or redirects are altering the title
 621                         if ( !$this->mTitle->userCanRead() ) {
 622                                 $wgOut->loginToUse();
 623                                 $wgOut->output();
 624                                 exit;
 625                         }
 626
 627
 628                         # We're looking at an old revision
 629
 630                         if ( !empty( $oldid ) ) {
 631                                 $this->setOldSubtitle( isset($this->mOldId) ? $this->mOldId : $oldid );
 632                                 $wgOut->setRobotpolicy( 'noindex,follow' );
 633                         }
 634                         if ( '' != $this->mRedirectedFrom ) {
 635                                 $sk = $wgUser->getSkin();
 636                                 $redir = $sk->makeKnownLink( $this->mRedirectedFrom, '',
 637                                   'redirect=no' );
 638                                 $s = wfMsg( 'redirectedfrom', $redir );
 639                                 $wgOut->setSubtitle( $s );
 640
 641                                 # Can't cache redirects
 642                                 $pcache = false;
 643                         }
 644
 645                         # wrap user css and user js in pre and don't parse
 646                         # XXX: use $this->mTitle->usCssJsSubpage() when php is fixed/ a workaround is found
 647                         if (
 648                                 $this->mTitle->getNamespace() == NS_USER &&
 649                                 preg_match('/\\/[\\w]+\\.(css|js)$/', $this->mTitle->getDBkey())
 650                         ) {
 651                                 $wgOut->addWikiText( wfMsg('clearyourcache'));
 652                                 $wgOut->addHTML( '<pre>'.htmlspecialchars($this->mContent)."\n</pre>" );
 653                         } else if ( $rt = Title::newFromRedirect( $text ) ) {
 654                                 # Display redirect
 655                                 $imageUrl = $wgStylePath.'/common/images/redirect.png';
 656                                 $targetUrl = $rt->escapeLocalURL();
 657                                 $titleText = htmlspecialchars( $rt->getPrefixedText() );
 658                                 $link = $sk->makeLinkObj( $rt );
 659
 660                                 $wgOut->addHTML( '<img valign="center" src="'.$imageUrl.'" alt="#REDIRECT" />' .
 661                                   '<span class="redirectText">'.$link.'</span>' );
 662
 663                         } else if ( $pcache ) {
 664                                 # Display content and save to parser cache
 665                                 $wgOut->addPrimaryWikiText( $text, $this );
 666                         } else {
 667                                 # Display content, don't attempt to save to parser cache
 668                                 $wgOut->addWikiText( $text );
 669                         }
 670                 }
 671                 $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
 672                 # If we have been passed an &rcid= parameter, we want to give the user a
 673                 # chance to mark this new article as patrolled.
 674                 if ( $wgUseRCPatrol && !is_null ( $rcid ) && $rcid != 0 && $wgUser->getID() != 0 &&
 675                      ( $wgUser->isAllowed('patrol') || !$wgOnlySysopsCanPatrol ) )
 676                 {
 677                         $wgOut->addHTML( wfMsg ( 'markaspatrolledlink',
 678                                 $sk->makeKnownLinkObj ( $this->mTitle, wfMsg ( 'markaspatrolledtext' ),
 679                                         'action=markpatrolled&rcid='.$rcid )
 680                          ) );
 681                 }
 682
 683                 # Put link titles into the link cache
 684                 $wgOut->transformBuffer();
 685
 686                 # Add link titles as META keywords
 687                 $wgOut->addMetaTags() ;
 688
 689                 $this->viewUpdates();
 690                 wfProfileOut( $fname );
 691
 692                 $wgUser->clearNotification( $this->mTitle );
 693         }
 694
 695         /**
 696          * Theoretically we could defer these whole insert and update
 697          * functions for after display, but that's taking a big leap
 698          * of faith, and we want to be able to report database
 699          * errors at some point.
 700          * @private
 701          */
 702         function insertNewArticle( $text, $summary, $isminor, $watchthis ) {
 703                 global $wgOut, $wgUser;
 704                 global $wgUseSquid, $wgDeferredUpdateList, $wgInternalServer;
 705
 706                 $fname = 'Article::insertNewArticle';
 707
 708                 $this->mCountAdjustment = $this->isCountable( $text );
 709
 710                 $ns = $this->mTitle->getNamespace();
 711                 $ttl = $this->mTitle->getDBkey();
 712                 $text = $this->preSaveTransform( $text );
 713                 if ( $this->isRedirect( $text ) ) { $redir = 1; }
 714                 else { $redir = 0; }
 715
 716                 $now = wfTimestampNow();
 717                 $won = wfInvertTimestamp( $now );
 718                 wfSeedRandom();
 719                 $rand = wfRandom();
 720                 $isminor = ( $isminor && $wgUser->getID() ) ? 1 : 0;
 721
 722                 $mungedText = $text;
 723                 $flags = Revision::compressRevisionText( $mungedText );
 724
 725                 $dbw =& wfGetDB( DB_MASTER );
 726
 727                 $old_id = $dbw->nextSequenceValue( 'text_old_id_seq' );
 728                 $dbw->insert( 'text', array(
 729                         'old_id' => $old_id,
 730                         'old_text' => $mungedText,
 731                         'old_flags' => $flags,
 732                 ), $fname );
 733                 $revisionId = $dbw->insertId();
 734
 735                 $page_id = $dbw->nextSequenceValue( 'page_page_id_seq' );
 736                 $dbw->insert( 'page', array(
 737                         'page_id' => $page_id,
 738                         'page_namespace' => $ns,
 739                         'page_title' => $ttl,
 740                         'page_counter' => 0,
 741                         'page_restrictions' => '',
 742                         'page_is_redirect' => $redir,
 743                         'page_is_new' => 1,
 744                         'page_random' => $rand,
 745                         'page_touched' => $dbw->timestamp($now),
 746                         'page_latest' => $revisionId,
 747                 ), $fname );
 748                 $newid = $dbw->insertId();
 749
 750                 $dbw->insert( 'revision', array(
 751                         'rev_page' => $newid,
 752                         'rev_id' => $revisionId,
 753                         'rev_comment' => $summary,
 754                         'rev_user' => $wgUser->getID(),
 755                         'rev_timestamp' => $dbw->timestamp($now),
 756                         'rev_minor_edit' => $isminor,
 757                         'rev_user_text' => $wgUser->getName(),
 758                         'inverse_timestamp' => $won,
 759                 ), $fname );
 760
 761                 $this->mTitle->resetArticleID( $newid );
 762
 763                 Article::onArticleCreate( $this->mTitle );
 764                 RecentChange::notifyNew( $now, $this->mTitle, $isminor, $wgUser, $summary );
 765
 766                 if ($watchthis) {
 767                         if(!$this->mTitle->userIsWatching()) $this->watch();
 768                 } else {
 769                         if ( $this->mTitle->userIsWatching() ) {
 770                                 $this->unwatch();
 771                         }
 772                 }
 773
 774                 # The talk page isn't in the regular link tables, so we need to update manually:
 775                 $talkns = $ns ^ 1; # talk -> normal; normal -> talk
 776                 $dbw->update( 'page',
 777                         array( 'page_touched' => $dbw->timestamp($now) ),
 778                         array( 'page_namespace' => $talkns,
 779                                'page_title' => $ttl ),
 780                         $fname );
 781
 782                 # standard deferred updates
 783                 $this->editUpdates( $text, $summary, $isminor, $now );
 784
 785                 $oldid = 0; # new article
 786                 $this->showArticle( $text, wfMsg( 'newarticle' ), false, $isminor, $now, $summary, $oldid );
 787         }
 788
 789         /**
 790          * Fetch and uncompress the text for a given revision.
 791          * Can ask by rev_id number or timestamp (set $field)
 792          */
 793         function fetchRevisionText( $revId = null, $field = 'rev_id' ) {
 794                 $fname = 'Article::fetchRevisionText';
 795                 $dbw =& wfGetDB( DB_MASTER );
 796                 if( $revId ) {
 797                         $rev = $dbw->addQuotes( $revId );
 798                 } else {
 799                         $rev = 'page_latest';
 800                 }
 801                 $result = $dbw->query(
 802                         sprintf( "SELECT old_text, old_flags
 803                                 FROM %s,%s,%s
 804                                 WHERE old_id=rev_id AND rev_page=page_id AND page_id=%d
 805                                 AND %s=%s",
 806                                 $dbw->tableName( 'page' ),
 807                                 $dbw->tableName( 'revision' ),
 808                                 $dbw->tableName( 'text' ),
 809                                 IntVal( $this->mTitle->getArticleId() ),
 810                                 $field,
 811                                 $rev ),
 812                         $fname );
 813                 $obj = $dbw->fetchObject( $result );
 814                 $dbw->freeResult( $result );
 815                 $oldtext = Revision::getRevisionText( $obj );
 816                 return $oldtext;
 817         }
 818
 819         function getTextOfLastEditWithSectionReplacedOrAdded($section, $text, $summary = '', $edittime = NULL) {
 820                 $fname = 'Article::getTextOfLastEditWithSectionReplacedOrAdded';
 821                 if( is_null( $edittime ) ) {
 822                         $oldtext = $this->fetchRevisionText();
 823                 } else {
 824                         $oldtext = $this->fetchRevisionText( $edittime, 'rev_timestamp' );
 825                 }
 826                 if ($section != '') {
 827                         if($section=='new') {
 828                                 if($summary) $subject="== {$summary} ==\n\n";
 829                                 $text=$oldtext."\n\n".$subject.$text;
 830                         } else {
 831
 832                                 # strip NOWIKI etc. to avoid confusion (true-parameter causes HTML
 833                                 # comments to be stripped as well)
 834                                 $striparray=array();
 835                                 $parser=new Parser();
 836                                 $parser->mOutputType=OT_WIKI;
 837                                 $oldtext=$parser->strip($oldtext, $striparray, true);
 838
 839                                 # now that we can be sure that no pseudo-sections are in the source,
 840                                 # split it up
 841                                 # Unfortunately we can't simply do a preg_replace because that might
 842                                 # replace the wrong section, so we have to use the section counter instead
 843                                 $secs=preg_split('/(^=+.+?=+|^<h[1-6].*?' . '>.*?<\/h[1-6].*?' . '>)(?!\S)/mi',
 844                                   $oldtext,-1,PREG_SPLIT_DELIM_CAPTURE);
 845                                 $secs[$section*2]=$text."\n\n"; // replace with edited
 846
 847                                 # section 0 is top (intro) section
 848                                 if($section!=0) {
 849
 850                                         # headline of old section - we need to go through this section
 851                                         # to determine if there are any subsections that now need to
 852                                         # be erased, as the mother section has been replaced with
 853                                         # the text of all subsections.
 854                                         $headline=$secs[$section*2-1];
 855                                         preg_match( '/^(=+).+?=+|^<h([1-6]).*?' . '>.*?<\/h[1-6].*?' . '>(?!\S)/mi',$headline,$matches);
 856                                         $hlevel=$matches[1];
 857
 858                                         # determine headline level for wikimarkup headings
 859                                         if(strpos($hlevel,'=')!==false) {
 860                                                 $hlevel=strlen($hlevel);
 861                                         }
 862
 863                                         $secs[$section*2-1]=''; // erase old headline
 864                                         $count=$section+1;
 865                                         $break=false;
 866                                         while(!empty($secs[$count*2-1]) && !$break) {
 867
 868                                                 $subheadline=$secs[$count*2-1];
 869                                                 preg_match(
 870                                                  '/^(=+).+?=+|^<h([1-6]).*?' . '>.*?<\/h[1-6].*?' . '>(?!\S)/mi',$subheadline,$matches);
 871                                                 $subhlevel=$matches[1];
 872                                                 if(strpos($subhlevel,'=')!==false) {
 873                                                         $subhlevel=strlen($subhlevel);
 874                                                 }
 875                                                 if($subhlevel > $hlevel) {
 876                                                         // erase old subsections
 877                                                         $secs[$count*2-1]='';
 878                                                         $secs[$count*2]='';
 879                                                 }
 880                                                 if($subhlevel <= $hlevel) {
 881                                                         $break=true;
 882                                                 }
 883                                                 $count++;
 884
 885                                         }
 886
 887                                 }
 888                                 $text=join('',$secs);
 889                                 # reinsert the stuff that we stripped out earlier
 890                                 $text=$parser->unstrip($text,$striparray);
 891                                 $text=$parser->unstripNoWiki($text,$striparray);
 892                         }
 893
 894                 }
 895                 return $text;
 896         }
 897
 898         /**
 899          * Change an existing article. Puts the previous version back into the old table, updates RC
 900          * and all necessary caches, mostly via the deferred update array.
 901          *
 902          * It is possible to call this function from a command-line script, but note that you should
 903          * first set $wgUser, and clean up $wgDeferredUpdates after each edit.
 904          */
 905         function updateArticle( $text, $summary, $minor, $watchthis, $forceBot = false, $sectionanchor = '' ) {
 906                 global $wgOut, $wgUser;
 907                 global $wgDBtransactions, $wgMwRedir;
 908                 global $wgUseSquid, $wgInternalServer;
 909
 910                 $fname = 'Article::updateArticle';
 911                 $good = true;
 912
 913                 if ( $this->mMinorEdit ) { $me1 = 1; } else { $me1 = 0; }
 914                 if ( $minor && $wgUser->getID() ) { $me2 = 1; } else { $me2 = 0; }
 915                 if ( $this->isRedirect( $text ) ) {
 916                         # Remove all content but redirect
 917                         # This could be done by reconstructing the redirect from a title given by
 918                         # Title::newFromRedirect(), but then we wouldn't know which synonym the user
 919                         # wants to see
 920                         if ( preg_match( "/^((" . $wgMwRedir->getBaseRegex() . ')[^\\n]+)/i', $text, $m ) ) {
 921                                 $redir = 1;
 922                                 $text = $m[1] . "\n";
 923                         }
 924                 }
 925                 else { $redir = 0; }
 926
 927                 $text = $this->preSaveTransform( $text );
 928                 $dbw =& wfGetDB( DB_MASTER );
 929
 930                 # Update article, but only if changed.
 931
 932                 # It's important that we either rollback or complete, otherwise an attacker could
 933                 # overwrite cur entries by sending precisely timed user aborts. Random bored users
 934                 # could conceivably have the same effect, especially if cur is locked for long periods.
 935                 if( $wgDBtransactions ) {
 936                         $dbw->query( 'BEGIN', $fname );
 937                 } else {
 938                         $userAbort = ignore_user_abort( true );
 939                 }
 940
 941                 $oldtext = $this->getContent( true );
 942
 943                 if ( 0 != strcmp( $text, $oldtext ) ) {
 944                         $this->mCountAdjustment = $this->isCountable( $text )
 945                           - $this->isCountable( $oldtext );
 946                         $now = wfTimestampNow();
 947                         $won = wfInvertTimestamp( $now );
 948
 949                         $mungedText = $text;
 950                         $flags = Revision::compressRevisionText( $newtext );
 951
 952                         $lastRevision = $dbw->selectField(
 953                                 'page', 'page_latest', array( 'page_id' => $this->getId() ) );
 954
 955                         # Record the text to the text table
 956                         $old_id = $dbw->nextSequenceValue( 'text_old_id_val' );
 957                         $dbw->insert( 'text',
 958                                 array(
 959                                         'old_id' => $old_id,
 960                                         'old_text' => $mungedText,
 961                                         'old_flags' => $flags,
 962                                 ), $fname
 963                         );
 964                         $revisionId = $dbw->insertId();
 965
 966                         # Record the edit in revisions
 967                         $dbw->insert( 'revision',
 968                                 array(
 969                                         'rev_id' => $revisionId,
 970                                         'rev_page' => $this->getID(),
 971                                         'rev_comment' => $summary,
 972                                         'rev_minor_edit' => $me2,
 973                                         'rev_user' => $wgUser->getID(),
 974                                         'rev_user_text' => $wgUser->getName(),
 975                                         'rev_timestamp' => $dbw->timestamp( $now ),
 976                                         'inverse_timestamp' => $won
 977                                 ), $fname
 978                         );
 979
 980                         # Update page
 981                         $dbw->update( 'page',
 982                                 array( /* SET */
 983                                         'page_latest' => $revisionId,
 984                                         'page_touched' => $dbw->timestamp( $now ),
 985                                         'page_is_new' => 0,
 986                                         'page_is_redirect' => $redir,
 987                                 ), array( /* WHERE */
 988                                         'page_id' => $this->getID(),
 989                                         'page_latest' => $lastRevision, # Paranoia
 990                                 ), $fname
 991                         );
 992
 993                         if( $dbw->affectedRows() == 0 ) {
 994                                 /* Belated edit conflict! Run away!! */
 995                                 $good = false;
 996                         } else {
 997                                 # Update recentchanges and purge cache and whatnot
 998                                 $bot = (int)($wgUser->isBot() || $forceBot);
 999                                 RecentChange::notifyEdit( $now, $this->mTitle, $me2, $wgUser, $summary,
1000                                         $lastRevision, $this->getTimestamp(), $bot );
1001                                 Article::onArticleEdit( $this->mTitle );
1002                         }
1003                 }
1004
1005                 if( $wgDBtransactions ) {
1006                         $dbw->query( 'COMMIT', $fname );
1007                 } else {
1008                         ignore_user_abort( $userAbort );
1009                 }
1010
1011                 if ( $good ) {
1012                 if ($watchthis) {
1013                         if (!$this->mTitle->userIsWatching()) $this->watch();
1014                 } else {
1015                         if ( $this->mTitle->userIsWatching() ) {
1016                                 $this->unwatch();
1017                         }
1018                 }
1019                 # standard deferred updates
1020                 $this->editUpdates( $text, $summary, $minor, $now );
1021
1022
1023                 $urls = array();
1024                 # Template namespace
1025                 # Purge all articles linking here
1026                 if ( $this->mTitle->getNamespace() == NS_TEMPLATE) {
1027                         $titles = $this->mTitle->getLinksTo();
1028                         Title::touchArray( $titles );
1029                         if ( $wgUseSquid ) {
1030                                         foreach ( $titles as $title ) {
1031                                                 $urls[] = $title->getInternalURL();
1032                                         }
1033                         }
1034                 }
1035
1036                 # Squid updates
1037                 if ( $wgUseSquid ) {
1038                         $urls = array_merge( $urls, $this->mTitle->getSquidURLs() );
1039                         $u = new SquidUpdate( $urls );
1040                         $u->doUpdate();
1041                 }
1042
1043                 $this->showArticle( $text, wfMsg( 'updated' ), $sectionanchor, $me2, $now, $summary, $lastRevision );
1044                 }
1045                 return $good;
1046         }
1047
1048         /**
1049          * After we've either updated or inserted the article, update
1050          * the link tables and redirect to the new page.
1051          */
1052         function showArticle( $text, $subtitle , $sectionanchor = '', $me2, $now, $summary, $oldid ) {
1053                 global $wgOut, $wgUser, $wgLinkCache, $wgEnotif;
1054
1055                 $wgLinkCache = new LinkCache();
1056                 # Select for update
1057                 $wgLinkCache->forUpdate( true );
1058
1059                 # Get old version of link table to allow incremental link updates
1060                 $wgLinkCache->preFill( $this->mTitle );
1061                 $wgLinkCache->clear();
1062
1063                 # Parse the text and replace links with placeholders
1064                 $wgOut = new OutputPage();
1065                 $wgOut->addWikiText( $text );
1066
1067                 # Look up the links in the DB and add them to the link cache
1068                 $wgOut->transformBuffer( RLH_FOR_UPDATE );
1069
1070                 if( $this->isRedirect( $text ) )
1071                         $r = 'redirect=no';
1072                 else
1073                         $r = '';
1074                 $wgOut->redirect( $this->mTitle->getFullURL( $r ).$sectionanchor );
1075
1076                 # this call would better fit into RecentChange::notifyEdit and RecentChange::notifyNew .
1077                 # this will be improved later (to-do)
1078
1079                 include_once( "UserMailer.php" );
1080                 $wgEnotif = new EmailNotification ();
1081                 $wgEnotif->NotifyOnPageChange( $wgUser->getID(), $this->mTitle->getDBkey(), $this->mTitle->getNamespace(),$now, $summary, $me2, $oldid );
1082         }
1083
1084         /**
1085          * Validate article
1086          * @todo document this function a bit more
1087          */
1088         function validate () {
1089                 global $wgOut, $wgUseValidation;
1090                 if( $wgUseValidation ) {
1091                         require_once ( 'SpecialValidate.php' ) ;
1092                         $wgOut->setPagetitle( wfMsg( 'validate' ) . ': ' . $this->mTitle->getPrefixedText() );
1093                         $wgOut->setRobotpolicy( 'noindex,follow' );
1094                         if( $this->mTitle->getNamespace() != 0 ) {
1095                                 $wgOut->addHTML( wfMsg( 'val_validate_article_namespace_only' ) );
1096                                 return;
1097                         }
1098                         $v = new Validation;
1099                         $v->validate_form( $this->mTitle->getDBkey() );
1100                 } else {
1101                         $wgOut->errorpage( 'nosuchaction', 'nosuchactiontext' );
1102                 }
1103         }
1104
1105         /**
1106          * Mark this particular edit as patrolled
1107          */
1108         function markpatrolled() {
1109                 global $wgOut, $wgRequest, $wgOnlySysopsCanPatrol, $wgUseRCPatrol, $wgUser;
1110                 $wgOut->setRobotpolicy( 'noindex,follow' );
1111
1112                 if ( !$wgUseRCPatrol )
1113                 {
1114                         $wgOut->errorpage( 'rcpatroldisabled', 'rcpatroldisabledtext' );
1115                         return;
1116                 }
1117                 if ( $wgUser->getID() == 0 )
1118                 {
1119                         $wgOut->loginToUse();
1120                         return;
1121                 }
1122                 if ( $wgOnlySysopsCanPatrol && !$wgUser->isAllowed('patrol') )
1123                 {
1124                         $wgOut->sysopRequired();
1125                         return;
1126                 }
1127                 $rcid = $wgRequest->getVal( 'rcid' );
1128                 if ( !is_null ( $rcid ) )
1129                 {
1130                         RecentChange::markPatrolled( $rcid );
1131                         $wgOut->setPagetitle( wfMsg( 'markedaspatrolled' ) );
1132                         $wgOut->addWikiText( wfMsg( 'markedaspatrolledtext' ) );
1133
1134                         $rcTitle = Title::makeTitle( NS_SPECIAL, 'Recentchanges' );
1135                         $wgOut->returnToMain( false, $rcTitle->getPrefixedText() );
1136                 }
1137                 else
1138                 {
1139                         $wgOut->errorpage( 'markedaspatrollederror', 'markedaspatrollederrortext' );
1140                 }
1141         }
1142
1143
1144         /**
1145          * Add this page to $wgUser's watchlist
1146          */
1147
1148         function watch() {
1149
1150                 global $wgUser, $wgOut;
1151
1152                 if ( 0 == $wgUser->getID() ) {
1153                         $wgOut->errorpage( 'watchnologin', 'watchnologintext' );
1154                         return;
1155                 }
1156                 if ( wfReadOnly() ) {
1157                         $wgOut->readOnlyPage();
1158                         return;
1159                 }
1160
1161                 if (wfRunHooks('WatchArticle', $wgUser, $this)) {
1162
1163                         $wgUser->addWatch( $this->mTitle );
1164                         $wgUser->saveSettings();
1165
1166                         wfRunHooks('WatchArticleComplete', $wgUser, $this);
1167
1168                         $wgOut->setPagetitle( wfMsg( 'addedwatch' ) );
1169                         $wgOut->setRobotpolicy( 'noindex,follow' );
1170
1171                         $link = $this->mTitle->getPrefixedText();
1172                         $text = wfMsg( 'addedwatchtext', $link );
1173                         $wgOut->addWikiText( $text );
1174                 }
1175
1176                 $wgOut->returnToMain( true, $this->mTitle->getPrefixedText() );
1177         }
1178
1179         /**
1180          * Stop watching a page
1181          */
1182
1183         function unwatch() {
1184
1185                 global $wgUser, $wgOut;
1186
1187                 if ( 0 == $wgUser->getID() ) {
1188                         $wgOut->errorpage( 'watchnologin', 'watchnologintext' );
1189                         return;
1190                 }
1191                 if ( wfReadOnly() ) {
1192                         $wgOut->readOnlyPage();
1193                         return;
1194                 }
1195
1196                 if (wfRunHooks('UnwatchArticle', $wgUser, $this)) {
1197
1198                         $wgUser->removeWatch( $this->mTitle );
1199                         $wgUser->saveSettings();
1200
1201                         wfRunHooks('UnwatchArticleComplete', $wgUser, $this);
1202
1203                         $wgOut->setPagetitle( wfMsg( 'removedwatch' ) );
1204                         $wgOut->setRobotpolicy( 'noindex,follow' );
1205
1206                         $link = $this->mTitle->getPrefixedText();
1207                         $text = wfMsg( 'removedwatchtext', $link );
1208                         $wgOut->addWikiText( $text );
1209                 }
1210
1211                 $wgOut->returnToMain( true, $this->mTitle->getPrefixedText() );
1212         }
1213
1214         /**
1215          * protect a page
1216          */
1217         function protect( $limit = 'sysop' ) {
1218                 global $wgUser, $wgOut, $wgRequest;
1219
1220                 if ( ! $wgUser->isAllowed('protect') ) {
1221                         $wgOut->sysopRequired();
1222                         return;
1223                 }
1224                 if ( wfReadOnly() ) {
1225                         $wgOut->readOnlyPage();
1226                         return;
1227                 }
1228                 $id = $this->mTitle->getArticleID();
1229                 if ( 0 == $id ) {
1230                         $wgOut->fatalError( wfMsg( 'badarticleerror' ) );
1231                         return;
1232                 }
1233
1234                 $confirm = $wgRequest->getBool( 'wpConfirmProtect' ) && $wgRequest->wasPosted();
1235                 $moveonly = $wgRequest->getBool( 'wpMoveOnly' );
1236                 $reason = $wgRequest->getText( 'wpReasonProtect' );
1237
1238                 if ( $confirm ) {
1239                         $dbw =& wfGetDB( DB_MASTER );
1240                         $dbw->update( 'page',
1241                                 array( /* SET */
1242                                         'page_touched' => $dbw->timestamp(),
1243                                         'page_restrictions' => (string)$limit
1244                                 ), array( /* WHERE */
1245                                         'page_id' => $id
1246                                 ), 'Article::protect'
1247                         );
1248
1249                         $restrictions = "move=" . $limit;
1250                         if( !$moveonly ) {
1251                                 $restrictions .= ":edit=" . $limit;
1252                         }
1253                         if (wfRunHooks('ArticleProtect', $this, $wgUser, $limit == 'sysop', $reason, $moveonly)) {
1254
1255                                 $dbw =& wfGetDB( DB_MASTER );
1256                                 $dbw->update( 'page',
1257                                                           array( /* SET */
1258                                                                          'page_touched' => $dbw->timestamp(),
1259                                                                          'page_restrictions' => $restrictions
1260                                                                          ), array( /* WHERE */
1261                                                                                            'page_id' => $id
1262                                                                                            ), 'Article::protect'
1263                                                           );
1264
1265                                 wfRunHooks('ArticleProtectComplete', $this, $wgUser, $limit == 'sysop', $reason, $moveonly);
1266
1267                                 $log = new LogPage( 'protect' );
1268                                 if ( $limit === '' ) {
1269                                         $log->addEntry( 'unprotect', $this->mTitle, $reason );
1270                                 } else {
1271                                         $log->addEntry( 'protect', $this->mTitle, $reason );
1272                                 }
1273                                 $wgOut->redirect( $this->mTitle->getFullURL() );
1274                         }
1275                         return;
1276                 } else {
1277                         $reason = htmlspecialchars( wfMsg( 'protectreason' ) );
1278                         return $this->confirmProtect( '', $reason, $limit );
1279                 }
1280         }
1281
1282         /**
1283          * Output protection confirmation dialog
1284          */
1285         function confirmProtect( $par, $reason, $limit = 'sysop'  ) {
1286                 global $wgOut;
1287
1288                 wfDebug( "Article::confirmProtect\n" );
1289
1290                 $sub = htmlspecialchars( $this->mTitle->getPrefixedText() );
1291                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
1292
1293                 $check = '';
1294                 $protcom = '';
1295                 $moveonly = '';
1296
1297                 if ( $limit === '' ) {
1298                         $wgOut->setPageTitle( wfMsg( 'confirmunprotect' ) );
1299                         $wgOut->setSubtitle( wfMsg( 'unprotectsub', $sub ) );
1300                         $wgOut->addWikiText( wfMsg( 'confirmunprotecttext' ) );
1301                         $check = htmlspecialchars( wfMsg( 'confirmunprotect' ) );
1302                         $protcom = htmlspecialchars( wfMsg( 'unprotectcomment' ) );
1303                         $formaction = $this->mTitle->escapeLocalURL( 'action=unprotect' . $par );
1304                 } else {
1305                         $wgOut->setPageTitle( wfMsg( 'confirmprotect' ) );
1306                         $wgOut->setSubtitle( wfMsg( 'protectsub', $sub ) );
1307                         $wgOut->addWikiText( wfMsg( 'confirmprotecttext' ) );
1308                         $check = htmlspecialchars( wfMsg( 'confirmprotect' ) );
1309                         $moveonly = htmlspecialchars( wfMsg( 'protectmoveonly' ) );
1310                         $protcom = htmlspecialchars( wfMsg( 'protectcomment' ) );
1311                         $formaction = $this->mTitle->escapeLocalURL( 'action=protect' . $par );
1312                 }
1313
1314                 $confirm = htmlspecialchars( wfMsg( 'confirm' ) );
1315
1316                 $wgOut->addHTML( "
1317 <form id='protectconfirm' method='post' action=\"{$formaction}\">
1318         <table border='0'>
1319                 <tr>
1320                         <td align='right'>
1321                                 <label for='wpReasonProtect'>{$protcom}:</label>
1322                         </td>
1323                         <td align='left'>
1324                                 <input type='text' size='60' name='wpReasonProtect' id='wpReasonProtect' value=\"" . htmlspecialchars( $reason ) . "\" />
1325                         </td>
1326                 </tr>
1327                 <tr>
1328                         <td>&nbsp;</td>
1329                 </tr>
1330                 <tr>
1331                         <td align='right'>
1332                                 <input type='checkbox' name='wpConfirmProtect' value='1' id='wpConfirmProtect' />
1333                         </td>
1334                         <td>
1335                                 <label for='wpConfirmProtect'>{$check}</label>
1336                         </td>
1337                 </tr> " );
1338                 if($moveonly != '') {
1339                         $wgOut->AddHTML( "
1340                 <tr>
1341                         <td align='right'>
1342                                 <input type='checkbox' name='wpMoveOnly' value='1' id='wpMoveOnly' />
1343                         </td>
1344                         <td>
1345                                 <label for='wpMoveOnly'>{$moveonly}</label>
1346                         </td>
1347                 </tr> " );
1348                 }
1349                 $wgOut->addHTML( "
1350                 <tr>
1351                         <td>&nbsp;</td>
1352                         <td>
1353                                 <input type='submit' name='wpConfirmProtectB' value=\"{$confirm}\" />
1354                         </td>
1355                 </tr>
1356         </table>
1357 </form>\n" );
1358
1359                 $wgOut->returnToMain( false );
1360         }
1361
1362         /**
1363          * Unprotect the pages
1364          */
1365         function unprotect() {
1366                 return $this->protect( '' );
1367         }
1368
1369         /*
1370          * UI entry point for page deletion
1371          */
1372         function delete() {
1373                 global $wgUser, $wgOut, $wgMessageCache, $wgRequest;
1374                 $fname = 'Article::delete';
1375                 $confirm = $wgRequest->getBool( 'wpConfirm' ) && $wgRequest->wasPosted();
1376                 $reason = $wgRequest->getText( 'wpReason' );
1377
1378                 # This code desperately needs to be totally rewritten
1379
1380                 # Check permissions
1381                 if ( ( ! $wgUser->isAllowed('delete') ) ) {
1382                         $wgOut->sysopRequired();
1383                         return;
1384                 }
1385                 if ( wfReadOnly() ) {
1386                         $wgOut->readOnlyPage();
1387                         return;
1388                 }
1389
1390                 # Better double-check that it hasn't been deleted yet!
1391                 $wgOut->setPagetitle( wfMsg( 'confirmdelete' ) );
1392                 if ( ( '' == trim( $this->mTitle->getText() ) )
1393                   or ( $this->mTitle->getArticleId() == 0 ) ) {
1394                         $wgOut->fatalError( wfMsg( 'cannotdelete' ) );
1395                         return;
1396                 }
1397
1398                 if ( $confirm ) {
1399                         $this->doDelete( $reason );
1400                         return;
1401                 }
1402
1403                 # determine whether this page has earlier revisions
1404                 # and insert a warning if it does
1405                 # we select the text because it might be useful below
1406                 $dbr =& $this->getDB();
1407                 $ns = $this->mTitle->getNamespace();
1408                 $title = $this->mTitle->getDBkey();
1409                 $old = $dbr->selectRow( 'old',
1410                         array( 'old_text', 'old_flags' ),
1411                         array(
1412                                 'old_namespace' => $ns,
1413                                 'old_title' => $title,
1414                         ), $fname, $this->getSelectOptions( array( 'ORDER BY' => 'inverse_timestamp' ) )
1415                 );
1416
1417                 if( $old !== false && !$confirm ) {
1418                         $skin=$wgUser->getSkin();
1419                         $wgOut->addHTML('<b>'.wfMsg('historywarning'));
1420                         $wgOut->addHTML( $skin->historyLink() .'</b>');
1421                 }
1422
1423                 # Fetch cur_text
1424                 $s = $dbr->selectRow( 'cur',
1425                         array( 'cur_text' ),
1426                         array(
1427                                 'cur_namespace' => $ns,
1428                                 'cur_title' => $title,
1429                         ), $fname, $this->getSelectOptions()
1430                 );
1431
1432                 if( $s !== false ) {
1433                         # if this is a mini-text, we can paste part of it into the deletion reason
1434
1435                         #if this is empty, an earlier revision may contain "useful" text
1436                         $blanked = false;
1437                         if($s->cur_text != '') {
1438                                 $text=$s->cur_text;
1439                         } else {
1440                                 if($old) {
1441                                         $text = Revision::getRevisionText( $old );
1442                                         $blanked = true;
1443                                 }
1444
1445                         }
1446
1447                         $length=strlen($text);
1448
1449                         # this should not happen, since it is not possible to store an empty, new
1450                         # page. Let's insert a standard text in case it does, though
1451                         if($length == 0 && $reason === '') {
1452                                 $reason = wfMsg('exblank');
1453                         }
1454
1455                         if($length < 500 && $reason === '') {
1456
1457                                 # comment field=255, let's grep the first 150 to have some user
1458                                 # space left
1459                                 $text=substr($text,0,150);
1460                                 # let's strip out newlines and HTML tags
1461                                 $text=preg_replace('/\"/',"'",$text);
1462                                 $text=preg_replace('/\</','&lt;',$text);
1463                                 $text=preg_replace('/\>/','&gt;',$text);
1464                                 $text=preg_replace("/[\n\r]/",'',$text);
1465                                 if(!$blanked) {
1466                                         $reason=wfMsg('excontent'). " '".$text;
1467                                 } else {
1468                                         $reason=wfMsg('exbeforeblank') . " '".$text;
1469                                 }
1470                                 if($length>150) { $reason .= '...'; } # we've only pasted part of the text
1471                                 $reason.="'";
1472                         }
1473                 }
1474
1475                 return $this->confirmDelete( '', $reason );
1476         }
1477
1478         /**
1479          * Output deletion confirmation dialog
1480          */
1481         function confirmDelete( $par, $reason ) {
1482                 global $wgOut;
1483
1484                 wfDebug( "Article::confirmDelete\n" );
1485
1486                 $sub = htmlspecialchars( $this->mTitle->getPrefixedText() );
1487                 $wgOut->setSubtitle( wfMsg( 'deletesub', $sub ) );
1488                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
1489                 $wgOut->addWikiText( wfMsg( 'confirmdeletetext' ) );
1490
1491                 $formaction = $this->mTitle->escapeLocalURL( 'action=delete' . $par );
1492
1493                 $confirm = htmlspecialchars( wfMsg( 'confirm' ) );
1494                 $check = htmlspecialchars( wfMsg( 'confirmcheck' ) );
1495                 $delcom = htmlspecialchars( wfMsg( 'deletecomment' ) );
1496
1497                 $wgOut->addHTML( "
1498 <form id='deleteconfirm' method='post' action=\"{$formaction}\">
1499         <table border='0'>
1500                 <tr>
1501                         <td align='right'>
1502                                 <label for='wpReason'>{$delcom}:</label>
1503                         </td>
1504                         <td align='left'>
1505                                 <input type='text' size='60' name='wpReason' id='wpReason' value=\"" . htmlspecialchars( $reason ) . "\" />
1506                         </td>
1507                 </tr>
1508                 <tr>
1509                         <td>&nbsp;</td>
1510                 </tr>
1511                 <tr>
1512                         <td align='right'>
1513                                 <input type='checkbox' name='wpConfirm' value='1' id='wpConfirm' />
1514                         </td>
1515                         <td>
1516                                 <label for='wpConfirm'>{$check}</label>
1517                         </td>
1518                 </tr>
1519                 <tr>
1520                         <td>&nbsp;</td>
1521                         <td>
1522                                 <input type='submit' name='wpConfirmB' value=\"{$confirm}\" />
1523                         </td>
1524                 </tr>
1525         </table>
1526 </form>\n" );
1527
1528                 $wgOut->returnToMain( false );
1529         }
1530
1531
1532         /**
1533          * Perform a deletion and output success or failure messages
1534          */
1535         function doDelete( $reason ) {
1536                 global $wgOut, $wgUser, $wgContLang;
1537                 $fname = 'Article::doDelete';
1538                 wfDebug( $fname."\n" );
1539
1540                 if (wfRunHooks('ArticleDelete', $this, $wgUser, $reason)) {
1541                         if ( $this->doDeleteArticle( $reason ) ) {
1542                                 $deleted = $this->mTitle->getPrefixedText();
1543
1544                                 $wgOut->setPagetitle( wfMsg( 'actioncomplete' ) );
1545                                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
1546
1547                                 $sk = $wgUser->getSkin();
1548                                 $loglink = $sk->makeKnownLink( $wgContLang->getNsText( NS_PROJECT ) .
1549                                                                                            ':' . wfMsgForContent( 'dellogpage' ),
1550                                                                                            wfMsg( 'deletionlog' ) );
1551
1552                                 $text = wfMsg( 'deletedtext', $deleted, $loglink );
1553
1554                                 $wgOut->addHTML( '<p>' . $text . "</p>\n" );
1555                                 $wgOut->returnToMain( false );
1556                                 wfRunHooks('ArticleDeleteComplete', $this, $wgUser, $reason);
1557                         } else {
1558                                 $wgOut->fatalError( wfMsg( 'cannotdelete' ) );
1559                         }
1560                 }
1561         }
1562
1563         /**
1564          * Back-end article deletion
1565          * Deletes the article with database consistency, writes logs, purges caches
1566          * Returns success
1567          */
1568         function doDeleteArticle( $reason ) {
1569                 global $wgUser;
1570                 global  $wgUseSquid, $wgDeferredUpdateList, $wgInternalServer;
1571
1572                 $fname = 'Article::doDeleteArticle';
1573                 wfDebug( $fname."\n" );
1574
1575                 $dbw =& wfGetDB( DB_MASTER );
1576                 $ns = $this->mTitle->getNamespace();
1577                 $t = $this->mTitle->getDBkey();
1578                 $id = $this->mTitle->getArticleID();
1579
1580                 if ( $t == '' || $id == 0 ) {
1581                         return false;
1582                 }
1583
1584                 $u = new SiteStatsUpdate( 0, 1, -$this->isCountable( $this->getContent( true ) ) );
1585                 array_push( $wgDeferredUpdateList, $u );
1586
1587                 $linksTo = $this->mTitle->getLinksTo();
1588
1589                 # Squid purging
1590                 if ( $wgUseSquid ) {
1591                         $urls = array(
1592                                 $this->mTitle->getInternalURL(),
1593                                 $this->mTitle->getInternalURL( 'history' )
1594                         );
1595                         foreach ( $linksTo as $linkTo ) {
1596                                 $urls[] = $linkTo->getInternalURL();
1597                         }
1598
1599                         $u = new SquidUpdate( $urls );
1600                         array_push( $wgDeferredUpdateList, $u );
1601
1602                 }
1603
1604                 # Client and file cache invalidation
1605                 Title::touchArray( $linksTo );
1606
1607                 # Move article and history to the "archive" table
1608                 $archiveTable = $dbw->tableName( 'archive' );
1609                 $oldTable = $dbw->tableName( 'old' );
1610                 $curTable = $dbw->tableName( 'cur' );
1611                 $recentchangesTable = $dbw->tableName( 'recentchanges' );
1612                 $linksTable = $dbw->tableName( 'links' );
1613                 $brokenlinksTable = $dbw->tableName( 'brokenlinks' );
1614
1615                 $dbw->insertSelect( 'archive', 'cur',
1616                         array(
1617                                 'ar_namespace' => 'cur_namespace',
1618                                 'ar_title' => 'cur_title',
1619                                 'ar_text' => 'cur_text',
1620                                 'ar_comment' => 'cur_comment',
1621                                 'ar_user' => 'cur_user',
1622                                 'ar_user_text' => 'cur_user_text',
1623                                 'ar_timestamp' => 'cur_timestamp',
1624                                 'ar_minor_edit' => 'cur_minor_edit',
1625                                 'ar_flags' => 0,
1626                         ), array(
1627                                 'cur_namespace' => $ns,
1628                                 'cur_title' => $t,
1629                         ), $fname
1630                 );
1631
1632                 $dbw->insertSelect( 'archive', 'old',
1633                         array(
1634                                 'ar_namespace' => 'old_namespace',
1635                                 'ar_title' => 'old_title',
1636                                 'ar_text' => 'old_text',
1637                                 'ar_comment' => 'old_comment',
1638                                 'ar_user' => 'old_user',
1639                                 'ar_user_text' => 'old_user_text',
1640                                 'ar_timestamp' => 'old_timestamp',
1641                                 'ar_minor_edit' => 'old_minor_edit',
1642                                 'ar_flags' => 'old_flags'
1643                         ), array(
1644                                 'old_namespace' => $ns,
1645                                 'old_title' => $t,
1646                         ), $fname
1647                 );
1648
1649                 # Now that it's safely backed up, delete it
1650
1651                 $dbw->delete( 'cur', array( 'cur_namespace' => $ns, 'cur_title' => $t ), $fname );
1652                 $dbw->delete( 'old', array( 'old_namespace' => $ns, 'old_title' => $t ), $fname );
1653                 $dbw->delete( 'recentchanges', array( 'rc_namespace' => $ns, 'rc_title' => $t ), $fname );
1654
1655                 # Finally, clean up the link tables
1656                 $t = $this->mTitle->getPrefixedDBkey();
1657
1658                 Article::onArticleDelete( $this->mTitle );
1659
1660                 # Insert broken links
1661                 $brokenLinks = array();
1662                 foreach ( $linksTo as $titleObj ) {
1663                         # Get article ID. Efficient because it was loaded into the cache by getLinksTo().
1664                         $linkID = $titleObj->getArticleID();
1665                         $brokenLinks[] = array( 'bl_from' => $linkID, 'bl_to' => $t );
1666                 }
1667                 $dbw->insert( 'brokenlinks', $brokenLinks, $fname, 'IGNORE' );
1668
1669                 # Delete live links
1670                 $dbw->delete( 'links', array( 'l_to' => $id ) );
1671                 $dbw->delete( 'links', array( 'l_from' => $id ) );
1672                 $dbw->delete( 'imagelinks', array( 'il_from' => $id ) );
1673                 $dbw->delete( 'brokenlinks', array( 'bl_from' => $id ) );
1674                 $dbw->delete( 'categorylinks', array( 'cl_from' => $id ) );
1675
1676                 # Log the deletion
1677                 $log = new LogPage( 'delete' );
1678                 $log->addEntry( 'delete', $this->mTitle, $reason );
1679
1680                 # Clear the cached article id so the interface doesn't act like we exist
1681                 $this->mTitle->resetArticleID( 0 );
1682                 $this->mTitle->mArticleID = 0;
1683                 return true;
1684         }
1685
1686         /**
1687          * Revert a modification
1688          */
1689         function rollback() {
1690                 global $wgUser, $wgOut, $wgRequest;
1691                 $fname = 'Article::rollback';
1692
1693                 if ( ! $wgUser->isAllowed('rollback') ) {
1694                         $wgOut->sysopRequired();
1695                         return;
1696                 }
1697                 if ( wfReadOnly() ) {
1698                         $wgOut->readOnlyPage( $this->getContent( true ) );
1699                         return;
1700                 }
1701                 $dbw =& wfGetDB( DB_MASTER );
1702
1703                 # Enhanced rollback, marks edits rc_bot=1
1704                 $bot = $wgRequest->getBool( 'bot' );
1705
1706                 # Replace all this user's current edits with the next one down
1707                 $tt = $this->mTitle->getDBKey();
1708                 $n = $this->mTitle->getNamespace();
1709
1710                 # Get the last editor, lock table exclusively
1711                 $s = $dbw->selectRow( 'cur',
1712                         array( 'cur_id','cur_user','cur_user_text','cur_comment' ),
1713                         array( 'cur_title' => $tt, 'cur_namespace' => $n ),
1714                         $fname, 'FOR UPDATE'
1715                 );
1716                 if( $s === false ) {
1717                         # Something wrong
1718                         $wgOut->addHTML( wfMsg( 'notanarticle' ) );
1719                         return;
1720                 }
1721                 $ut = $dbw->strencode( $s->cur_user_text );
1722                 $uid = $s->cur_user;
1723                 $pid = $s->cur_id;
1724
1725                 $from = str_replace( '_', ' ', $wgRequest->getVal( 'from' ) );
1726                 if( $from != $s->cur_user_text ) {
1727                         $wgOut->setPageTitle(wfmsg('rollbackfailed'));
1728                         $wgOut->addWikiText( wfMsg( 'alreadyrolled',
1729                                 htmlspecialchars( $this->mTitle->getPrefixedText()),
1730                                 htmlspecialchars( $from ),
1731                                 htmlspecialchars( $s->cur_user_text ) ) );
1732                         if($s->cur_comment != '') {
1733                                 $wgOut->addHTML(
1734                                         wfMsg('editcomment',
1735                                         htmlspecialchars( $s->cur_comment ) ) );
1736                         }
1737                         return;
1738                 }
1739
1740                 # Get the last edit not by this guy
1741                 $s = $dbw->selectRow( 'old',
1742                         array( 'old_text','old_user','old_user_text','old_timestamp','old_flags' ),
1743                         array(
1744                                 'old_namespace' => $n,
1745                                 'old_title' => $tt,
1746                                 "old_user <> {$uid} OR old_user_text <> '{$ut}'"
1747                         ), $fname, array( 'FOR UPDATE', 'USE INDEX' => 'name_title_timestamp' )
1748                 );
1749                 if( $s === false ) {
1750                         # Something wrong
1751                         $wgOut->setPageTitle(wfMsg('rollbackfailed'));
1752                         $wgOut->addHTML( wfMsg( 'cantrollback' ) );
1753                         return;
1754                 }
1755
1756                 if ( $bot ) {
1757                         # Mark all reverted edits as bot
1758                         $dbw->update( 'recentchanges',
1759                                 array( /* SET */
1760                                         'rc_bot' => 1
1761                                 ), array( /* WHERE */
1762                                         'rc_user' => $uid,
1763                                         "rc_timestamp > '{$s->old_timestamp}'",
1764                                 ), $fname
1765                         );
1766                 }
1767
1768                 # Save it!
1769                 $newcomment = wfMsg( 'revertpage', $s->old_user_text, $from );
1770                 $wgOut->setPagetitle( wfMsg( 'actioncomplete' ) );
1771                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
1772                 $wgOut->addHTML( '<h2>' . htmlspecialchars( $newcomment ) . "</h2>\n<hr />\n" );
1773                 $this->updateArticle( Revision::getRevisionText( $s ), $newcomment, 1, $this->mTitle->userIsWatching(), $bot );
1774                 Article::onArticleEdit( $this->mTitle );
1775                 $wgOut->returnToMain( false );
1776         }
1777
1778
1779         /**
1780          * Do standard deferred updates after page view
1781          * @private
1782          */
1783         function viewUpdates() {
1784                 global $wgDeferredUpdateList;
1785
1786                 if ( 0 != $this->getID() ) {
1787                         global $wgDisableCounters;
1788                         if( !$wgDisableCounters ) {
1789                                 Article::incViewCount( $this->getID() );
1790                                 $u = new SiteStatsUpdate( 1, 0, 0 );
1791                                 array_push( $wgDeferredUpdateList, $u );
1792                         }
1793                 }
1794
1795                 # Update newtalk status if user is reading their own
1796                 # talk page
1797
1798                 global $wgUser;
1799                 if ($this->mTitle->getNamespace() == NS_USER_TALK &&
1800                         $this->mTitle->getText() == $wgUser->getName()) {
1801                         require_once( 'UserTalkUpdate.php' );
1802                         $u = new UserTalkUpdate( 0, $this->mTitle->getNamespace(), $this->mTitle->getDBkey(), false, false, false );
1803                 }
1804         }
1805
1806         /**
1807          * Do standard deferred updates after page edit.
1808          * Every 1000th edit, prune the recent changes table.
1809          * @private
1810          * @param string $text
1811          */
1812         function editUpdates( $text, $summary, $minoredit, $timestamp_of_pagechange) {
1813                 global $wgDeferredUpdateList, $wgDBname, $wgMemc;
1814                 global $wgMessageCache, $wgUser;
1815
1816                 wfSeedRandom();
1817                 if ( 0 == mt_rand( 0, 999 ) ) {
1818                         # Periodically flush old entries from the recentchanges table.
1819                         global $wgRCMaxAge;
1820                         $dbw =& wfGetDB( DB_MASTER );
1821                         $cutoff = $dbw->timestamp( time() - $wgRCMaxAge );
1822                         $sql = "DELETE FROM recentchanges WHERE rc_timestamp < '{$cutoff}'";
1823                         $dbw->query( $sql );
1824                 }
1825                 $id = $this->getID();
1826                 $title = $this->mTitle->getPrefixedDBkey();
1827                 $shortTitle = $this->mTitle->getDBkey();
1828
1829                 $adj = $this->mCountAdjustment;
1830
1831                 if ( 0 != $id ) {
1832                         $u = new LinksUpdate( $id, $title );
1833                         array_push( $wgDeferredUpdateList, $u );
1834                         $u = new SiteStatsUpdate( 0, 1, $adj );
1835                         array_push( $wgDeferredUpdateList, $u );
1836                         $u = new SearchUpdate( $id, $title, $text );
1837                         array_push( $wgDeferredUpdateList, $u );
1838
1839                         # If this is another user's talk page,
1840                         # create a watchlist entry for this page
1841
1842                         if ($this->mTitle->getNamespace() == NS_USER_TALK &&
1843                                 $shortTitle != $wgUser->getName()) {
1844                                 require_once( 'UserTalkUpdate.php' );
1845                                 $u = new UserTalkUpdate( 1, $this->mTitle->getNamespace(), $shortTitle, $summary, $minoredit, $timestamp_of_pagechange);
1846                         }
1847
1848                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
1849                                 $wgMessageCache->replace( $shortTitle, $text );
1850                         }
1851                 }
1852         }
1853
1854         /**
1855          * @todo document this function
1856          * @private
1857          * @param string $oldid         Revision ID of this article revision
1858          */
1859         function setOldSubtitle( $oldid=0 ) {
1860                 global $wgLang, $wgOut, $wgUser;
1861
1862                 $td = $wgLang->timeanddate( $this->mTimestamp, true );
1863                 $sk = $wgUser->getSkin();
1864                 $lnk = $sk->makeKnownLinkObj ( $this->mTitle, wfMsg( 'currentrevisionlink' ) );
1865                 $prevlink = $sk->makeKnownLinkObj( $this->mTitle, wfMsg( 'previousrevision' ), 'direction=prev&oldid='.$oldid );
1866                 $nextlink = $sk->makeKnownLinkObj( $this->mTitle, wfMsg( 'nextrevision' ), 'direction=next&oldid='.$oldid );
1867                 $r = wfMsg( 'revisionasofwithlink', $td, $lnk, $prevlink, $nextlink );
1868                 $wgOut->setSubtitle( $r );
1869         }
1870
1871         /**
1872          * This function is called right before saving the wikitext,
1873          * so we can do things like signatures and links-in-context.
1874          *
1875          * @param string $text
1876          */
1877         function preSaveTransform( $text ) {
1878                 global $wgParser, $wgUser;
1879                 return $wgParser->preSaveTransform( $text, $this->mTitle, $wgUser, ParserOptions::newFromUser( $wgUser ) );
1880         }
1881
1882         /* Caching functions */
1883
1884         /**
1885          * checkLastModified returns true if it has taken care of all
1886          * output to the client that is necessary for this request.
1887          * (that is, it has sent a cached version of the page)
1888          */
1889         function tryFileCache() {
1890                 static $called = false;
1891                 if( $called ) {
1892                         wfDebug( " tryFileCache() -- called twice!?\n" );
1893                         return;
1894                 }
1895                 $called = true;
1896                 if($this->isFileCacheable()) {
1897                         $touched = $this->mTouched;
1898                         $cache = new CacheManager( $this->mTitle );
1899                         if($cache->isFileCacheGood( $touched )) {
1900                                 global $wgOut;
1901                                 wfDebug( " tryFileCache() - about to load\n" );
1902                                 $cache->loadFromFileCache();
1903                                 return true;
1904                         } else {
1905                                 wfDebug( " tryFileCache() - starting buffer\n" );
1906                                 ob_start( array(&$cache, 'saveToFileCache' ) );
1907                         }
1908                 } else {
1909                         wfDebug( " tryFileCache() - not cacheable\n" );
1910                 }
1911         }
1912
1913         /**
1914          * Check if the page can be cached
1915          * @return bool
1916          */
1917         function isFileCacheable() {
1918                 global $wgUser, $wgUseFileCache, $wgShowIPinHeader, $wgRequest;
1919                 extract( $wgRequest->getValues( 'action', 'oldid', 'diff', 'redirect', 'printable' ) );
1920
1921                 return $wgUseFileCache
1922                         and (!$wgShowIPinHeader)
1923                         and ($this->getID() != 0)
1924                         and ($wgUser->getId() == 0)
1925                         and (!$wgUser->getNewtalk())
1926                         and ($this->mTitle->getNamespace() != NS_SPECIAL )
1927                         and (empty( $action ) || $action == 'view')
1928                         and (!isset($oldid))
1929                         and (!isset($diff))
1930                         and (!isset($redirect))
1931                         and (!isset($printable))
1932                         and (!$this->mRedirectedFrom);
1933         }
1934
1935         /**
1936          * Loads cur_touched and returns a value indicating if it should be used
1937          *
1938          */
1939         function checkTouched() {
1940                 $fname = 'Article::checkTouched';
1941                 $id = $this->getID();
1942                 $dbr =& $this->getDB();
1943                 $s = $dbr->selectRow( 'page', array( 'page_touched', 'page_is_redirect' ),
1944                         array( 'page_id' => $id ), $fname, $this->getSelectOptions() );
1945                 if( $s !== false ) {
1946                         $this->mTouched = wfTimestamp( TS_MW, $s->page_touched );
1947                         return !$s->page_is_redirect;
1948                 } else {
1949                         return false;
1950                 }
1951         }
1952
1953         /**
1954          * Edit an article without doing all that other stuff
1955          *
1956          * @param string $text text submitted
1957          * @param string $comment comment submitted
1958          * @param integer $minor whereas it's a minor modification
1959          */
1960         function quickEdit( $text, $comment = '', $minor = 0 ) {
1961                 global $wgUser;
1962                 $fname = 'Article::quickEdit';
1963
1964                 #wfDebugDieBacktrace( "$fname called." );
1965
1966                 wfProfileIn( $fname );
1967
1968                 $dbw =& wfGetDB( DB_MASTER );
1969                 $ns = $this->mTitle->getNamespace();
1970                 $dbkey = $this->mTitle->getDBkey();
1971                 $encDbKey = $dbw->strencode( $dbkey );
1972                 $timestamp = wfTimestampNow();
1973                 # insert new text
1974                 $dbw->insert( 'text', array(
1975                                 'old_text' => $text,
1976                                 'old_flags' => "" ), $fname );
1977                 $text_id = $dbw->insertID();
1978
1979                 # update page
1980                 $dbw->update( 'page', array(
1981                         'page_is_new' => 0,
1982                         'page_touched' => $timestamp,
1983                         'page_is_redirect' => $this->isRedirect( $text ) ? 1 : 0,
1984                         'page_latest' => $text_id ),
1985                         array( 'page_namespace' => $ns, 'page_title' => $dbkey ), $fname );
1986                 # Retrieve page ID
1987                 $page_id = $dbw->selectField( 'page', 'page_id', array( 'page_namespace' => $ns, 'page_title' => $dbkey ), $fname );
1988
1989                 # update revision
1990                 $dbw->insert( 'revision', array(
1991                         'rev_id' => $text_id,
1992                         'rev_page' => $page_id,
1993                         'rev_comment' => $comment,
1994                         'rev_user' => $wgUser->getID(),
1995                         'rev_user_text' => $wgUser->getName(),
1996                         'rev_timestamp' => $timestamp,
1997                         'inverse_timestamp' => wfInvertTimestamp( $timestamp ),
1998                         'rev_minor_edit' => intval($minor) ),
1999                         $fname );
2000 /*
2001                 # Save to history
2002                 $dbw->insertSelect( 'old', 'cur',
2003                         array(
2004                                 'old_namespace' => 'cur_namespace',
2005                                 'old_title' => 'cur_title',
2006                                 'old_text' => 'cur_text',
2007                                 'old_comment' => 'cur_comment',
2008                                 'old_user' => 'cur_user',
2009                                 'old_user_text' => 'cur_user_text',
2010                                 'old_timestamp' => 'cur_timestamp',
2011                                 'inverse_timestamp' => '99999999999999-cur_timestamp',
2012                         ), array(
2013                                 'cur_namespace' => $ns,
2014                                 'cur_title' => $dbkey,
2015                         ), $fname
2016                 );
2017
2018                 # Use the affected row count to determine if the article is new
2019                 $numRows = $dbw->affectedRows();
2020
2021                 # Make an array of fields to be inserted
2022                 $fields = array(
2023                         'cur_text' => $text,
2024                         'cur_timestamp' => $timestamp,
2025                         'cur_user' => $wgUser->getID(),
2026                         'cur_user_text' => $wgUser->getName(),
2027                         'inverse_timestamp' => wfInvertTimestamp( $timestamp ),
2028                         'cur_comment' => $comment,
2029                         'cur_is_redirect' => $this->isRedirect( $text ) ? 1 : 0,
2030                         'cur_minor_edit' => intval($minor),
2031                         'cur_touched' => $dbw->timestamp($timestamp),
2032                 );
2033
2034                 if ( $numRows ) {
2035                         # Update article
2036                         $fields['cur_is_new'] = 0;
2037                         $dbw->update( 'cur', $fields, array( 'cur_namespace' => $ns, 'cur_title' => $dbkey ), $fname );
2038                 } else {
2039                         # Insert new article
2040                         $fields['cur_is_new'] = 1;
2041                         $fields['cur_namespace'] = $ns;
2042                         $fields['cur_title'] = $dbkey;
2043                         $fields['cur_random'] = $rand = wfRandom();
2044                         $dbw->insert( 'cur', $fields, $fname );
2045                 }
2046 */
2047                 wfProfileOut( $fname );
2048         }
2049
2050         /**
2051          * Used to increment the view counter
2052          *
2053          * @static
2054          * @param integer $id article id
2055          */
2056         function incViewCount( $id ) {
2057                 $id = intval( $id );
2058                 global $wgHitcounterUpdateFreq;
2059
2060                 $dbw =& wfGetDB( DB_MASTER );
2061                 $pageTable = $dbw->tableName( 'page' );
2062                 $hitcounterTable = $dbw->tableName( 'hitcounter' );
2063                 $acchitsTable = $dbw->tableName( 'acchits' );
2064
2065                 if( $wgHitcounterUpdateFreq <= 1 ){ //
2066                         $dbw->query( "UPDATE $pageTable SET page_counter = page_counter + 1 WHERE page_id = $id" );
2067                         return;
2068                 }
2069
2070                 # Not important enough to warrant an error page in case of failure
2071                 $oldignore = $dbw->ignoreErrors( true );
2072
2073                 $dbw->query( "INSERT INTO $hitcounterTable (hc_id) VALUES ({$id})" );
2074
2075                 $checkfreq = intval( $wgHitcounterUpdateFreq/25 + 1 );
2076                 if( (rand() % $checkfreq != 0) or ($dbw->lastErrno() != 0) ){
2077                         # Most of the time (or on SQL errors), skip row count check
2078                         $dbw->ignoreErrors( $oldignore );
2079                         return;
2080                 }
2081
2082                 $res = $dbw->query("SELECT COUNT(*) as n FROM $hitcounterTable");
2083                 $row = $dbw->fetchObject( $res );
2084                 $rown = intval( $row->n );
2085                 if( $rown >= $wgHitcounterUpdateFreq ){
2086                         wfProfileIn( 'Article::incViewCount-collect' );
2087                         $old_user_abort = ignore_user_abort( true );
2088
2089                         $dbw->query("LOCK TABLES $hitcounterTable WRITE");
2090                         $dbw->query("CREATE TEMPORARY TABLE $acchitsTable TYPE=HEAP ".
2091                                 "SELECT hc_id,COUNT(*) AS hc_n FROM $hitcounterTable ".
2092                                 'GROUP BY hc_id');
2093                         $dbw->query("DELETE FROM $hitcounterTable");
2094                         $dbw->query('UNLOCK TABLES');
2095                         $dbw->query("UPDATE $curTable,$acchitsTable SET cur_counter=cur_counter + hc_n ".
2096                                 'WHERE cur_id = hc_id');
2097                         $dbw->query("DROP TABLE $acchitsTable");
2098
2099                         ignore_user_abort( $old_user_abort );
2100                         wfProfileOut( 'Article::incViewCount-collect' );
2101                 }
2102                 $dbw->ignoreErrors( $oldignore );
2103         }
2104
2105         /**#@+
2106          * The onArticle*() functions are supposed to be a kind of hooks
2107          * which should be called whenever any of the specified actions
2108          * are done.
2109          *
2110          * This is a good place to put code to clear caches, for instance.
2111          *
2112          * This is called on page move and undelete, as well as edit
2113          * @static
2114          * @param $title_obj a title object
2115          */
2116
2117         function onArticleCreate($title_obj) {
2118                 global $wgUseSquid, $wgDeferredUpdateList;
2119
2120                 $titles = $title_obj->getBrokenLinksTo();
2121
2122                 # Purge squid
2123                 if ( $wgUseSquid ) {
2124                         $urls = $title_obj->getSquidURLs();
2125                         foreach ( $titles as $linkTitle ) {
2126                                 $urls[] = $linkTitle->getInternalURL();
2127                         }
2128                         $u = new SquidUpdate( $urls );
2129                         array_push( $wgDeferredUpdateList, $u );
2130                 }
2131
2132                 # Clear persistent link cache
2133                 LinkCache::linksccClearBrokenLinksTo( $title_obj->getPrefixedDBkey() );
2134         }
2135
2136         function onArticleDelete($title_obj) {
2137                 LinkCache::linksccClearLinksTo( $title_obj->getArticleID() );
2138         }
2139         function onArticleEdit($title_obj) {
2140                 LinkCache::linksccClearPage( $title_obj->getArticleID() );
2141         }
2142         /**#@-*/
2143
2144         /**
2145          * Info about this page
2146          */
2147         function info() {
2148                 global $wgUser, $wgTitle, $wgOut, $wgAllowPageInfo;
2149                 $fname = 'Article::info';
2150
2151                 if ( !$wgAllowPageInfo ) {
2152                         $wgOut->errorpage( 'nosuchaction', 'nosuchactiontext' );
2153                         return;
2154                 }
2155
2156                 $dbr =& $this->getDB();
2157
2158                 $basenamespace = $wgTitle->getNamespace() & (~1);
2159                 $cur_clause = array( 'cur_title' => $wgTitle->getDBkey(), 'cur_namespace' => $basenamespace );
2160                 $old_clause = array( 'old_title' => $wgTitle->getDBkey(), 'old_namespace' => $basenamespace );
2161                 $wl_clause  = array( 'wl_title' => $wgTitle->getDBkey(), 'wl_namespace' => $basenamespace );
2162                 $fullTitle = $wgTitle->makeName($basenamespace, $wgTitle->getDBKey());
2163                 $wgOut->setPagetitle(  $fullTitle );
2164                 $wgOut->setSubtitle( wfMsg( 'infosubtitle' ));
2165
2166                 # first, see if the page exists at all.
2167                 $exists = $dbr->selectField( 'cur', 'COUNT(*)', $cur_clause, $fname, $this->getSelectOptions() );
2168                 if ($exists < 1) {
2169                         $wgOut->addHTML( wfMsg('noarticletext') );
2170                 } else {
2171                         $numwatchers = $dbr->selectField( 'watchlist', 'COUNT(*)', $wl_clause, $fname,
2172                                 $this->getSelectOptions() );
2173                         $wgOut->addHTML( "<ul><li>" . wfMsg("numwatchers", $numwatchers) . '</li>' );
2174                         $old = $dbr->selectField( 'old', 'COUNT(*)', $old_clause, $fname, $this->getSelectOptions() );
2175                         $wgOut->addHTML( "<li>" . wfMsg('numedits', $old + 1) . '</li>');
2176
2177                         # to find number of distinct authors, we need to do some
2178                         # funny stuff because of the cur/old table split:
2179                         # - first, find the name of the 'cur' author
2180                         # - then, find the number of *other* authors in 'old'
2181
2182                         # find 'cur' author
2183                         $cur_author = $dbr->selectField( 'cur', 'cur_user_text', $cur_clause, $fname,
2184                                 $this->getSelectOptions() );
2185
2186                         # find number of 'old' authors excluding 'cur' author
2187                         $authors = $dbr->selectField( 'old', 'COUNT(DISTINCT old_user_text)',
2188                                 $old_clause + array( 'old_user_text<>' . $dbr->addQuotes( $cur_author ) ), $fname,
2189                                 $this->getSelectOptions() ) + 1;
2190
2191                         # now for the Talk page ...
2192                         $cur_clause = array( 'cur_title' => $wgTitle->getDBkey(), 'cur_namespace' => $basenamespace+1 );
2193                         $old_clause = array( 'old_title' => $wgTitle->getDBkey(), 'old_namespace' => $basenamespace+1 );
2194
2195                         # does it exist?
2196                         $exists = $dbr->selectField( 'cur', 'COUNT(*)', $cur_clause, $fname, $this->getSelectOptions() );
2197
2198                         # number of edits
2199                         if ($exists > 0) {
2200                                 $old = $dbr->selectField( 'old', 'COUNT(*)', $old_clause, $fname, $this->getSelectOptions() );
2201                                 $wgOut->addHTML( '<li>' . wfMsg("numtalkedits", $old + 1) . '</li>');
2202                         }
2203                         $wgOut->addHTML( '<li>' . wfMsg("numauthors", $authors) . '</li>' );
2204
2205                         # number of authors
2206                         if ($exists > 0) {
2207                                 $cur_author = $dbr->selectField( 'cur', 'cur_user_text', $cur_clause, $fname,
2208                                         $this->getSelectOptions() );
2209                                 $authors = $dbr->selectField( 'cur', 'COUNT(DISTINCT old_user_text)',
2210                                         $old_clause + array( 'old_user_text<>' . $dbr->addQuotes( $cur_author ) ),
2211                                         $fname, $this->getSelectOptions() );
2212
2213                                 $wgOut->addHTML( '<li>' . wfMsg('numtalkauthors', $authors) . '</li></ul>' );
2214                         }
2215                 }
2216         }
2217 }
2218
2219 /**
2220  * Check whether an article is a stub
2221  *
2222  * @public
2223  * @param integer $articleID    ID of the article that is to be checked
2224  */
2225 function wfArticleIsStub( $articleID ) {
2226         global $wgUser;
2227         $fname = 'wfArticleIsStub';
2228
2229         $threshold = $wgUser->getOption('stubthreshold') ;
2230         if ( $threshold > 0 ) {
2231                 $dbr =& wfGetDB( DB_SLAVE );
2232                 $s = $dbr->selectRow( array('page', 'text'),
2233                         array( 'LENGTH(old_text) AS len', 'page_namespace', 'page_is_redirect' ),
2234                         array( 'page_id' => $articleID, "page.page_latest=text.old_id" ),
2235                         $fname ) ;
2236                 if ( $s == false OR $s->page_is_redirect OR $s->page_namespace != NS_MAIN ) {
2237                         return false;
2238                 }
2239                 $size = $s->len;
2240                 return ( $size < $threshold );
2241         }
2242         return false;
2243 }
2244
2245 ?>