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