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() != '' ) {
 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->getID() != 0 &&
 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                 $won = wfInvertTimestamp( $now );
 722                 wfSeedRandom();
 723                 $rand = wfRandom();
 724                 $isminor = ( $isminor && $wgUser->getID() ) ? 1 : 0;
 725
 726                 $mungedText = $text;
 727                 $flags = Revision::compressRevisionText( $mungedText );
 728
 729                 $dbw =& wfGetDB( DB_MASTER );
 730
 731                 $old_id = $dbw->nextSequenceValue( 'text_old_id_seq' );
 732                 $dbw->insert( 'text', array(
 733                         'old_id' => $old_id,
 734                         'old_text' => $mungedText,
 735                         'old_flags' => $flags,
 736                 ), $fname );
 737                 $revisionId = $dbw->insertId();
 738
 739                 $page_id = $dbw->nextSequenceValue( 'page_page_id_seq' );
 740                 $dbw->insert( 'page', array(
 741                         'page_id' => $page_id,
 742                         'page_namespace' => $ns,
 743                         'page_title' => $ttl,
 744                         'page_counter' => 0,
 745                         'page_restrictions' => '',
 746                         'page_is_redirect' => $redir,
 747                         'page_is_new' => 1,
 748                         'page_random' => $rand,
 749                         'page_touched' => $dbw->timestamp($now),
 750                         'page_latest' => $revisionId,
 751                 ), $fname );
 752                 $newid = $dbw->insertId();
 753
 754                 $dbw->insert( 'revision', array(
 755                         'rev_page' => $newid,
 756                         'rev_id' => $revisionId,
 757                         'rev_comment' => $summary,
 758                         'rev_user' => $wgUser->getID(),
 759                         'rev_timestamp' => $dbw->timestamp($now),
 760                         'rev_minor_edit' => $isminor,
 761                         'rev_user_text' => $wgUser->getName(),
 762                         'inverse_timestamp' => $won,
 763                 ), $fname );
 764
 765                 $this->mTitle->resetArticleID( $newid );
 766
 767                 Article::onArticleCreate( $this->mTitle );
 768                 RecentChange::notifyNew( $now, $this->mTitle, $isminor, $wgUser, $summary );
 769
 770                 if ($watchthis) {
 771                         if(!$this->mTitle->userIsWatching()) $this->watch();
 772                 } else {
 773                         if ( $this->mTitle->userIsWatching() ) {
 774                                 $this->unwatch();
 775                         }
 776                 }
 777
 778                 # The talk page isn't in the regular link tables, so we need to update manually:
 779                 $talkns = $ns ^ 1; # talk -> normal; normal -> talk
 780                 $dbw->update( 'page',
 781                         array( 'page_touched' => $dbw->timestamp($now) ),
 782                         array( 'page_namespace' => $talkns,
 783                                'page_title' => $ttl ),
 784                         $fname );
 785
 786                 # standard deferred updates
 787                 $this->editUpdates( $text, $summary, $isminor, $now );
 788
 789                 $oldid = 0; # new article
 790                 $this->showArticle( $text, wfMsg( 'newarticle' ), false, $isminor, $now, $summary, $oldid );
 791         }
 792
 793         /**
 794          * Fetch and uncompress the text for a given revision.
 795          * Can ask by rev_id number or timestamp (set $field)
 796          */
 797         function fetchRevisionText( $revId = null, $field = 'rev_id' ) {
 798                 $fname = 'Article::fetchRevisionText';
 799                 $dbw =& wfGetDB( DB_MASTER );
 800                 if( $revId ) {
 801                         $rev = $dbw->addQuotes( $revId );
 802                 } else {
 803                         $rev = 'page_latest';
 804                 }
 805                 $result = $dbw->query(
 806                         sprintf( "SELECT old_text, old_flags
 807                                 FROM %s,%s,%s
 808                                 WHERE old_id=rev_id AND rev_page=page_id AND page_id=%d
 809                                 AND %s=%s",
 810                                 $dbw->tableName( 'page' ),
 811                                 $dbw->tableName( 'revision' ),
 812                                 $dbw->tableName( 'text' ),
 813                                 IntVal( $this->mTitle->getArticleId() ),
 814                                 $field,
 815                                 $rev ),
 816                         $fname );
 817                 $obj = $dbw->fetchObject( $result );
 818                 $dbw->freeResult( $result );
 819                 $oldtext = Revision::getRevisionText( $obj );
 820                 return $oldtext;
 821         }
 822
 823         function getTextOfLastEditWithSectionReplacedOrAdded($section, $text, $summary = '', $edittime = NULL) {
 824                 $fname = 'Article::getTextOfLastEditWithSectionReplacedOrAdded';
 825                 if( is_null( $edittime ) ) {
 826                         $oldtext = $this->fetchRevisionText();
 827                 } else {
 828                         $oldtext = $this->fetchRevisionText( $edittime, 'rev_timestamp' );
 829                 }
 830                 if ($section != '') {
 831                         if($section=='new') {
 832                                 if($summary) $subject="== {$summary} ==\n\n";
 833                                 $text=$oldtext."\n\n".$subject.$text;
 834                         } else {
 835
 836                                 # strip NOWIKI etc. to avoid confusion (true-parameter causes HTML
 837                                 # comments to be stripped as well)
 838                                 $striparray=array();
 839                                 $parser=new Parser();
 840                                 $parser->mOutputType=OT_WIKI;
 841                                 $oldtext=$parser->strip($oldtext, $striparray, true);
 842
 843                                 # now that we can be sure that no pseudo-sections are in the source,
 844                                 # split it up
 845                                 # Unfortunately we can't simply do a preg_replace because that might
 846                                 # replace the wrong section, so we have to use the section counter instead
 847                                 $secs=preg_split('/(^=+.+?=+|^<h[1-6].*?' . '>.*?<\/h[1-6].*?' . '>)(?!\S)/mi',
 848                                   $oldtext,-1,PREG_SPLIT_DELIM_CAPTURE);
 849                                 $secs[$section*2]=$text."\n\n"; // replace with edited
 850
 851                                 # section 0 is top (intro) section
 852                                 if($section!=0) {
 853
 854                                         # headline of old section - we need to go through this section
 855                                         # to determine if there are any subsections that now need to
 856                                         # be erased, as the mother section has been replaced with
 857                                         # the text of all subsections.
 858                                         $headline=$secs[$section*2-1];
 859                                         preg_match( '/^(=+).+?=+|^<h([1-6]).*?' . '>.*?<\/h[1-6].*?' . '>(?!\S)/mi',$headline,$matches);
 860                                         $hlevel=$matches[1];
 861
 862                                         # determine headline level for wikimarkup headings
 863                                         if(strpos($hlevel,'=')!==false) {
 864                                                 $hlevel=strlen($hlevel);
 865                                         }
 866
 867                                         $secs[$section*2-1]=''; // erase old headline
 868                                         $count=$section+1;
 869                                         $break=false;
 870                                         while(!empty($secs[$count*2-1]) && !$break) {
 871
 872                                                 $subheadline=$secs[$count*2-1];
 873                                                 preg_match(
 874                                                  '/^(=+).+?=+|^<h([1-6]).*?' . '>.*?<\/h[1-6].*?' . '>(?!\S)/mi',$subheadline,$matches);
 875                                                 $subhlevel=$matches[1];
 876                                                 if(strpos($subhlevel,'=')!==false) {
 877                                                         $subhlevel=strlen($subhlevel);
 878                                                 }
 879                                                 if($subhlevel > $hlevel) {
 880                                                         // erase old subsections
 881                                                         $secs[$count*2-1]='';
 882                                                         $secs[$count*2]='';
 883                                                 }
 884                                                 if($subhlevel <= $hlevel) {
 885                                                         $break=true;
 886                                                 }
 887                                                 $count++;
 888
 889                                         }
 890
 891                                 }
 892                                 $text=join('',$secs);
 893                                 # reinsert the stuff that we stripped out earlier
 894                                 $text=$parser->unstrip($text,$striparray);
 895                                 $text=$parser->unstripNoWiki($text,$striparray);
 896                         }
 897
 898                 }
 899                 return $text;
 900         }
 901
 902         /**
 903          * Change an existing article. Puts the previous version back into the old table, updates RC
 904          * and all necessary caches, mostly via the deferred update array.
 905          *
 906          * It is possible to call this function from a command-line script, but note that you should
 907          * first set $wgUser, and clean up $wgDeferredUpdates after each edit.
 908          */
 909         function updateArticle( $text, $summary, $minor, $watchthis, $forceBot = false, $sectionanchor = '' ) {
 910                 global $wgOut, $wgUser;
 911                 global $wgDBtransactions, $wgMwRedir;
 912                 global $wgUseSquid, $wgInternalServer;
 913
 914                 $fname = 'Article::updateArticle';
 915                 $good = true;
 916
 917                 if ( $this->mMinorEdit ) { $me1 = 1; } else { $me1 = 0; }
 918                 if ( $minor && $wgUser->getID() ) { $me2 = 1; } else { $me2 = 0; }
 919                 if ( $this->isRedirect( $text ) ) {
 920                         # Remove all content but redirect
 921                         # This could be done by reconstructing the redirect from a title given by
 922                         # Title::newFromRedirect(), but then we wouldn't know which synonym the user
 923                         # wants to see
 924                         if ( preg_match( "/^((" . $wgMwRedir->getBaseRegex() . ')[^\\n]+)/i', $text, $m ) ) {
 925                                 $redir = 1;
 926                                 $text = $m[1] . "\n";
 927                         }
 928                 }
 929                 else { $redir = 0; }
 930
 931                 $text = $this->preSaveTransform( $text );
 932                 $dbw =& wfGetDB( DB_MASTER );
 933
 934                 # Update article, but only if changed.
 935
 936                 # It's important that we either rollback or complete, otherwise an attacker could
 937                 # overwrite cur entries by sending precisely timed user aborts. Random bored users
 938                 # could conceivably have the same effect, especially if cur is locked for long periods.
 939                 if( $wgDBtransactions ) {
 940                         $dbw->query( 'BEGIN', $fname );
 941                 } else {
 942                         $userAbort = ignore_user_abort( true );
 943                 }
 944
 945                 $oldtext = $this->getContent( true );
 946
 947                 if ( 0 != strcmp( $text, $oldtext ) ) {
 948                         $this->mCountAdjustment = $this->isCountable( $text )
 949                           - $this->isCountable( $oldtext );
 950                         $now = wfTimestampNow();
 951                         $won = wfInvertTimestamp( $now );
 952
 953                         $mungedText = $text;
 954                         $flags = Revision::compressRevisionText( $mungedText );
 955
 956                         $lastRevision = $dbw->selectField(
 957                                 'page', 'page_latest', array( 'page_id' => $this->getId() ) );
 958
 959                         # Record the text to the text table
 960                         $old_id = $dbw->nextSequenceValue( 'text_old_id_val' );
 961                         $dbw->insert( 'text',
 962                                 array(
 963                                         'old_id' => $old_id,
 964                                         'old_text' => $mungedText,
 965                                         'old_flags' => $flags,
 966                                 ), $fname
 967                         );
 968                         $revisionId = $dbw->insertId();
 969
 970                         # Record the edit in revisions
 971                         $dbw->insert( 'revision',
 972                                 array(
 973                                         'rev_id' => $revisionId,
 974                                         'rev_page' => $this->getID(),
 975                                         'rev_comment' => $summary,
 976                                         'rev_minor_edit' => $me2,
 977                                         'rev_user' => $wgUser->getID(),
 978                                         'rev_user_text' => $wgUser->getName(),
 979                                         'rev_timestamp' => $dbw->timestamp( $now ),
 980                                         'inverse_timestamp' => $won
 981                                 ), $fname
 982                         );
 983
 984                         # Update page
 985                         $dbw->update( 'page',
 986                                 array( /* SET */
 987                                         'page_latest' => $revisionId,
 988                                         'page_touched' => $dbw->timestamp( $now ),
 989                                         'page_is_new' => 0,
 990                                         'page_is_redirect' => $redir,
 991                                 ), array( /* WHERE */
 992                                         'page_id' => $this->getID(),
 993                                         'page_latest' => $lastRevision, # Paranoia
 994                                 ), $fname
 995                         );
 996
 997                         if( $dbw->affectedRows() == 0 ) {
 998                                 /* Belated edit conflict! Run away!! */
 999                                 $good = false;
1000                         } else {
1001                                 # Update recentchanges and purge cache and whatnot
1002                                 $bot = (int)($wgUser->isBot() || $forceBot);
1003                                 RecentChange::notifyEdit( $now, $this->mTitle, $me2, $wgUser, $summary,
1004                                         $lastRevision, $this->getTimestamp(), $bot );
1005                                 Article::onArticleEdit( $this->mTitle );
1006                         }
1007                 }
1008
1009                 if( $wgDBtransactions ) {
1010                         $dbw->query( 'COMMIT', $fname );
1011                 } else {
1012                         ignore_user_abort( $userAbort );
1013                 }
1014
1015                 if ( $good ) {
1016                 if ($watchthis) {
1017                         if (!$this->mTitle->userIsWatching()) $this->watch();
1018                 } else {
1019                         if ( $this->mTitle->userIsWatching() ) {
1020                                 $this->unwatch();
1021                         }
1022                 }
1023                 # standard deferred updates
1024                 $this->editUpdates( $text, $summary, $minor, $now );
1025
1026
1027                 $urls = array();
1028                 # Template namespace
1029                 # Purge all articles linking here
1030                 if ( $this->mTitle->getNamespace() == NS_TEMPLATE) {
1031                         $titles = $this->mTitle->getLinksTo();
1032                         Title::touchArray( $titles );
1033                         if ( $wgUseSquid ) {
1034                                         foreach ( $titles as $title ) {
1035                                                 $urls[] = $title->getInternalURL();
1036                                         }
1037                         }
1038                 }
1039
1040                 # Squid updates
1041                 if ( $wgUseSquid ) {
1042                         $urls = array_merge( $urls, $this->mTitle->getSquidURLs() );
1043                         $u = new SquidUpdate( $urls );
1044                         $u->doUpdate();
1045                 }
1046
1047                 $this->showArticle( $text, wfMsg( 'updated' ), $sectionanchor, $me2, $now, $summary, $lastRevision );
1048                 }
1049                 return $good;
1050         }
1051
1052         /**
1053          * After we've either updated or inserted the article, update
1054          * the link tables and redirect to the new page.
1055          */
1056         function showArticle( $text, $subtitle , $sectionanchor = '', $me2, $now, $summary, $oldid ) {
1057                 global $wgOut, $wgUser, $wgLinkCache, $wgEnotif;
1058
1059                 $wgLinkCache = new LinkCache();
1060                 # Select for update
1061                 $wgLinkCache->forUpdate( true );
1062
1063                 # Get old version of link table to allow incremental link updates
1064                 $wgLinkCache->preFill( $this->mTitle );
1065                 $wgLinkCache->clear();
1066
1067                 # Parse the text and replace links with placeholders
1068                 $wgOut = new OutputPage();
1069                 $wgOut->addWikiText( $text );
1070
1071                 # Look up the links in the DB and add them to the link cache
1072                 $wgOut->transformBuffer( RLH_FOR_UPDATE );
1073
1074                 if( $this->isRedirect( $text ) )
1075                         $r = 'redirect=no';
1076                 else
1077                         $r = '';
1078                 $wgOut->redirect( $this->mTitle->getFullURL( $r ).$sectionanchor );
1079
1080                 # this call would better fit into RecentChange::notifyEdit and RecentChange::notifyNew .
1081                 # this will be improved later (to-do)
1082
1083                 include_once( "UserMailer.php" );
1084                 $wgEnotif = new EmailNotification ();
1085                 $wgEnotif->NotifyOnPageChange( $wgUser->getID(), $this->mTitle->getDBkey(), $this->mTitle->getNamespace(),$now, $summary, $me2, $oldid );
1086         }
1087
1088         /**
1089          * Mark this particular edit as patrolled
1090          */
1091         function markpatrolled() {
1092                 global $wgOut, $wgRequest, $wgOnlySysopsCanPatrol, $wgUseRCPatrol, $wgUser;
1093                 $wgOut->setRobotpolicy( 'noindex,follow' );
1094
1095                 if ( !$wgUseRCPatrol )
1096                 {
1097                         $wgOut->errorpage( 'rcpatroldisabled', 'rcpatroldisabledtext' );
1098                         return;
1099                 }
1100                 if ( $wgUser->getID() == 0 )
1101                 {
1102                         $wgOut->loginToUse();
1103                         return;
1104                 }
1105                 if ( $wgOnlySysopsCanPatrol && !$wgUser->isAllowed('patrol') )
1106                 {
1107                         $wgOut->sysopRequired();
1108                         return;
1109                 }
1110                 $rcid = $wgRequest->getVal( 'rcid' );
1111                 if ( !is_null ( $rcid ) )
1112                 {
1113                         RecentChange::markPatrolled( $rcid );
1114                         $wgOut->setPagetitle( wfMsg( 'markedaspatrolled' ) );
1115                         $wgOut->addWikiText( wfMsg( 'markedaspatrolledtext' ) );
1116
1117                         $rcTitle = Title::makeTitle( NS_SPECIAL, 'Recentchanges' );
1118                         $wgOut->returnToMain( false, $rcTitle->getPrefixedText() );
1119                 }
1120                 else
1121                 {
1122                         $wgOut->errorpage( 'markedaspatrollederror', 'markedaspatrollederrortext' );
1123                 }
1124         }
1125
1126
1127         /**
1128          * Add this page to $wgUser's watchlist
1129          */
1130
1131         function watch() {
1132
1133                 global $wgUser, $wgOut;
1134
1135                 if ( 0 == $wgUser->getID() ) {
1136                         $wgOut->errorpage( 'watchnologin', 'watchnologintext' );
1137                         return;
1138                 }
1139                 if ( wfReadOnly() ) {
1140                         $wgOut->readOnlyPage();
1141                         return;
1142                 }
1143
1144                 if (wfRunHooks('WatchArticle', $wgUser, $this)) {
1145
1146                         $wgUser->addWatch( $this->mTitle );
1147                         $wgUser->saveSettings();
1148
1149                         wfRunHooks('WatchArticleComplete', $wgUser, $this);
1150
1151                         $wgOut->setPagetitle( wfMsg( 'addedwatch' ) );
1152                         $wgOut->setRobotpolicy( 'noindex,follow' );
1153
1154                         $link = $this->mTitle->getPrefixedText();
1155                         $text = wfMsg( 'addedwatchtext', $link );
1156                         $wgOut->addWikiText( $text );
1157                 }
1158
1159                 $wgOut->returnToMain( true, $this->mTitle->getPrefixedText() );
1160         }
1161
1162         /**
1163          * Stop watching a page
1164          */
1165
1166         function unwatch() {
1167
1168                 global $wgUser, $wgOut;
1169
1170                 if ( 0 == $wgUser->getID() ) {
1171                         $wgOut->errorpage( 'watchnologin', 'watchnologintext' );
1172                         return;
1173                 }
1174                 if ( wfReadOnly() ) {
1175                         $wgOut->readOnlyPage();
1176                         return;
1177                 }
1178
1179                 if (wfRunHooks('UnwatchArticle', $wgUser, $this)) {
1180
1181                         $wgUser->removeWatch( $this->mTitle );
1182                         $wgUser->saveSettings();
1183
1184                         wfRunHooks('UnwatchArticleComplete', $wgUser, $this);
1185
1186                         $wgOut->setPagetitle( wfMsg( 'removedwatch' ) );
1187                         $wgOut->setRobotpolicy( 'noindex,follow' );
1188
1189                         $link = $this->mTitle->getPrefixedText();
1190                         $text = wfMsg( 'removedwatchtext', $link );
1191                         $wgOut->addWikiText( $text );
1192                 }
1193
1194                 $wgOut->returnToMain( true, $this->mTitle->getPrefixedText() );
1195         }
1196
1197         /**
1198          * protect a page
1199          */
1200         function protect( $limit = 'sysop' ) {
1201                 global $wgUser, $wgOut, $wgRequest;
1202
1203                 if ( ! $wgUser->isAllowed('protect') ) {
1204                         $wgOut->sysopRequired();
1205                         return;
1206                 }
1207                 if ( wfReadOnly() ) {
1208                         $wgOut->readOnlyPage();
1209                         return;
1210                 }
1211                 $id = $this->mTitle->getArticleID();
1212                 if ( 0 == $id ) {
1213                         $wgOut->fatalError( wfMsg( 'badarticleerror' ) );
1214                         return;
1215                 }
1216
1217                 $confirm = $wgRequest->getBool( 'wpConfirmProtect' ) && $wgRequest->wasPosted();
1218                 $moveonly = $wgRequest->getBool( 'wpMoveOnly' );
1219                 $reason = $wgRequest->getText( 'wpReasonProtect' );
1220
1221                 if ( $confirm ) {
1222                         $dbw =& wfGetDB( DB_MASTER );
1223                         $dbw->update( 'page',
1224                                 array( /* SET */
1225                                         'page_touched' => $dbw->timestamp(),
1226                                         'page_restrictions' => (string)$limit
1227                                 ), array( /* WHERE */
1228                                         'page_id' => $id
1229                                 ), 'Article::protect'
1230                         );
1231
1232                         $restrictions = "move=" . $limit;
1233                         if( !$moveonly ) {
1234                                 $restrictions .= ":edit=" . $limit;
1235                         }
1236                         if (wfRunHooks('ArticleProtect', $this, $wgUser, $limit == 'sysop', $reason, $moveonly)) {
1237
1238                                 $dbw =& wfGetDB( DB_MASTER );
1239                                 $dbw->update( 'page',
1240                                                           array( /* SET */
1241                                                                          'page_touched' => $dbw->timestamp(),
1242                                                                          'page_restrictions' => $restrictions
1243                                                                          ), array( /* WHERE */
1244                                                                                            'page_id' => $id
1245                                                                                            ), 'Article::protect'
1246                                                           );
1247
1248                                 wfRunHooks('ArticleProtectComplete', $this, $wgUser, $limit == 'sysop', $reason, $moveonly);
1249
1250                                 $log = new LogPage( 'protect' );
1251                                 if ( $limit === '' ) {
1252                                         $log->addEntry( 'unprotect', $this->mTitle, $reason );
1253                                 } else {
1254                                         $log->addEntry( 'protect', $this->mTitle, $reason );
1255                                 }
1256                                 $wgOut->redirect( $this->mTitle->getFullURL() );
1257                         }
1258                         return;
1259                 } else {
1260                         $reason = htmlspecialchars( wfMsg( 'protectreason' ) );
1261                         return $this->confirmProtect( '', $reason, $limit );
1262                 }
1263         }
1264
1265         /**
1266          * Output protection confirmation dialog
1267          */
1268         function confirmProtect( $par, $reason, $limit = 'sysop'  ) {
1269                 global $wgOut;
1270
1271                 wfDebug( "Article::confirmProtect\n" );
1272
1273                 $sub = htmlspecialchars( $this->mTitle->getPrefixedText() );
1274                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
1275
1276                 $check = '';
1277                 $protcom = '';
1278                 $moveonly = '';
1279
1280                 if ( $limit === '' ) {
1281                         $wgOut->setPageTitle( wfMsg( 'confirmunprotect' ) );
1282                         $wgOut->setSubtitle( wfMsg( 'unprotectsub', $sub ) );
1283                         $wgOut->addWikiText( wfMsg( 'confirmunprotecttext' ) );
1284                         $check = htmlspecialchars( wfMsg( 'confirmunprotect' ) );
1285                         $protcom = htmlspecialchars( wfMsg( 'unprotectcomment' ) );
1286                         $formaction = $this->mTitle->escapeLocalURL( 'action=unprotect' . $par );
1287                 } else {
1288                         $wgOut->setPageTitle( wfMsg( 'confirmprotect' ) );
1289                         $wgOut->setSubtitle( wfMsg( 'protectsub', $sub ) );
1290                         $wgOut->addWikiText( wfMsg( 'confirmprotecttext' ) );
1291                         $check = htmlspecialchars( wfMsg( 'confirmprotect' ) );
1292                         $moveonly = htmlspecialchars( wfMsg( 'protectmoveonly' ) );
1293                         $protcom = htmlspecialchars( wfMsg( 'protectcomment' ) );
1294                         $formaction = $this->mTitle->escapeLocalURL( 'action=protect' . $par );
1295                 }
1296
1297                 $confirm = htmlspecialchars( wfMsg( 'confirm' ) );
1298
1299                 $wgOut->addHTML( "
1300 <form id='protectconfirm' method='post' action=\"{$formaction}\">
1301         <table border='0'>
1302                 <tr>
1303                         <td align='right'>
1304                                 <label for='wpReasonProtect'>{$protcom}:</label>
1305                         </td>
1306                         <td align='left'>
1307                                 <input type='text' size='60' name='wpReasonProtect' id='wpReasonProtect' value=\"" . htmlspecialchars( $reason ) . "\" />
1308                         </td>
1309                 </tr>
1310                 <tr>
1311                         <td>&nbsp;</td>
1312                 </tr>
1313                 <tr>
1314                         <td align='right'>
1315                                 <input type='checkbox' name='wpConfirmProtect' value='1' id='wpConfirmProtect' />
1316                         </td>
1317                         <td>
1318                                 <label for='wpConfirmProtect'>{$check}</label>
1319                         </td>
1320                 </tr> " );
1321                 if($moveonly != '') {
1322                         $wgOut->AddHTML( "
1323                 <tr>
1324                         <td align='right'>
1325                                 <input type='checkbox' name='wpMoveOnly' value='1' id='wpMoveOnly' />
1326                         </td>
1327                         <td>
1328                                 <label for='wpMoveOnly'>{$moveonly}</label>
1329                         </td>
1330                 </tr> " );
1331                 }
1332                 $wgOut->addHTML( "
1333                 <tr>
1334                         <td>&nbsp;</td>
1335                         <td>
1336                                 <input type='submit' name='wpConfirmProtectB' value=\"{$confirm}\" />
1337                         </td>
1338                 </tr>
1339         </table>
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' ) && $wgRequest->wasPosted();
1359                 $reason = $wgRequest->getText( 'wpReason' );
1360
1361                 # This code desperately needs to be totally rewritten
1362
1363                 # Check permissions
1364                 if ( ( ! $wgUser->isAllowed('delete') ) ) {
1365                         $wgOut->sysopRequired();
1366                         return;
1367                 }
1368                 if ( wfReadOnly() ) {
1369                         $wgOut->readOnlyPage();
1370                         return;
1371                 }
1372
1373                 # Better double-check that it hasn't been deleted yet!
1374                 $wgOut->setPagetitle( wfMsg( 'confirmdelete' ) );
1375                 if ( ( '' == trim( $this->mTitle->getText() ) )
1376                   or ( $this->mTitle->getArticleId() == 0 ) ) {
1377                         $wgOut->fatalError( wfMsg( 'cannotdelete' ) );
1378                         return;
1379                 }
1380
1381                 if ( $confirm ) {
1382                         $this->doDelete( $reason );
1383                         return;
1384                 }
1385
1386                 # determine whether this page has earlier revisions
1387                 # and insert a warning if it does
1388                 # we select the text because it might be useful below
1389                 $dbr =& $this->getDB();
1390                 $ns = $this->mTitle->getNamespace();
1391                 $title = $this->mTitle->getDBkey();
1392                 $revisions = $dbr->select( array( 'page', 'revision' ),
1393                         array( 'rev_id' ),
1394                         array(
1395                                 'page_namespace' => $ns,
1396                                 'page_title' => $title,
1397                                 'rev_page = page_id'
1398                         ), $fname, $this->getSelectOptions( array( 'ORDER BY' => 'inverse_timestamp' ) )
1399                 );
1400
1401                 if( $dbr->numRows( $revisions ) > 1 && !$confirm ) {
1402                         $skin=$wgUser->getSkin();
1403                         $wgOut->addHTML('<b>'.wfMsg('historywarning'));
1404                         $wgOut->addHTML( $skin->historyLink() .'</b>');
1405                 }
1406
1407                 # Fetch cur_text
1408                 $s = $dbr->selectRow( array( 'page', 'text' ),
1409                         array( 'old_text' ),
1410                         array(
1411                                 'page_namespace' => $ns,
1412                                 'page_title' => $title,
1413                                 'page_latest = old_id'
1414                         ), $fname, $this->getSelectOptions()
1415                 );
1416
1417                 if( $s !== false ) {
1418                         # if this is a mini-text, we can paste part of it into the deletion reason
1419
1420                         #if this is empty, an earlier revision may contain "useful" text
1421                         $blanked = false;
1422                         if($s->old_text != '') {
1423                                 $text=$s->old_text;
1424                         } else {
1425                                 if($old) { # TODO
1426                                         $text = Revision::getRevisionText( $old );
1427                                         $blanked = true;
1428                                 }
1429
1430                         }
1431
1432                         $length=strlen($text);
1433
1434                         # this should not happen, since it is not possible to store an empty, new
1435                         # page. Let's insert a standard text in case it does, though
1436                         if($length == 0 && $reason === '') {
1437                                 $reason = wfMsg('exblank');
1438                         }
1439
1440                         if($length < 500 && $reason === '') {
1441
1442                                 # comment field=255, let's grep the first 150 to have some user
1443                                 # space left
1444                                 $text=substr($text,0,150);
1445                                 # let's strip out newlines and HTML tags
1446                                 $text=preg_replace('/\"/',"'",$text);
1447                                 $text=preg_replace('/\</','&lt;',$text);
1448                                 $text=preg_replace('/\>/','&gt;',$text);
1449                                 $text=preg_replace("/[\n\r]/",'',$text);
1450                                 if(!$blanked) {
1451                                         $reason=wfMsg('excontent'). " '".$text;
1452                                 } else {
1453                                         $reason=wfMsg('exbeforeblank') . " '".$text;
1454                                 }
1455                                 if($length>150) { $reason .= '...'; } # we've only pasted part of the text
1456                                 $reason.="'";
1457                         }
1458                 }
1459
1460                 return $this->confirmDelete( '', $reason );
1461         }
1462
1463         /**
1464          * Output deletion confirmation dialog
1465          */
1466         function confirmDelete( $par, $reason ) {
1467                 global $wgOut;
1468
1469                 wfDebug( "Article::confirmDelete\n" );
1470
1471                 $sub = htmlspecialchars( $this->mTitle->getPrefixedText() );
1472                 $wgOut->setSubtitle( wfMsg( 'deletesub', $sub ) );
1473                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
1474                 $wgOut->addWikiText( wfMsg( 'confirmdeletetext' ) );
1475
1476                 $formaction = $this->mTitle->escapeLocalURL( 'action=delete' . $par );
1477
1478                 $confirm = htmlspecialchars( wfMsg( 'confirm' ) );
1479                 $check = htmlspecialchars( wfMsg( 'confirmcheck' ) );
1480                 $delcom = htmlspecialchars( wfMsg( 'deletecomment' ) );
1481
1482                 $wgOut->addHTML( "
1483 <form id='deleteconfirm' method='post' action=\"{$formaction}\">
1484         <table border='0'>
1485                 <tr>
1486                         <td align='right'>
1487                                 <label for='wpReason'>{$delcom}:</label>
1488                         </td>
1489                         <td align='left'>
1490                                 <input type='text' size='60' name='wpReason' id='wpReason' value=\"" . htmlspecialchars( $reason ) . "\" />
1491                         </td>
1492                 </tr>
1493                 <tr>
1494                         <td>&nbsp;</td>
1495                 </tr>
1496                 <tr>
1497                         <td align='right'>
1498                                 <input type='checkbox' name='wpConfirm' value='1' id='wpConfirm' />
1499                         </td>
1500                         <td>
1501                                 <label for='wpConfirm'>{$check}</label>
1502                         </td>
1503                 </tr>
1504                 <tr>
1505                         <td>&nbsp;</td>
1506                         <td>
1507                                 <input type='submit' name='wpConfirmB' value=\"{$confirm}\" />
1508                         </td>
1509                 </tr>
1510         </table>
1511 </form>\n" );
1512
1513                 $wgOut->returnToMain( false );
1514         }
1515
1516
1517         /**
1518          * Perform a deletion and output success or failure messages
1519          */
1520         function doDelete( $reason ) {
1521                 global $wgOut, $wgUser, $wgContLang;
1522                 $fname = 'Article::doDelete';
1523                 wfDebug( $fname."\n" );
1524
1525                 if (wfRunHooks('ArticleDelete', $this, $wgUser, $reason)) {
1526                         if ( $this->doDeleteArticle( $reason ) ) {
1527                                 $deleted = $this->mTitle->getPrefixedText();
1528
1529                                 $wgOut->setPagetitle( wfMsg( 'actioncomplete' ) );
1530                                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
1531
1532                                 $sk = $wgUser->getSkin();
1533                                 $loglink = $sk->makeKnownLink( $wgContLang->getNsText( NS_PROJECT ) .
1534                                                                                            ':' . wfMsgForContent( 'dellogpage' ),
1535                                                                                            wfMsg( 'deletionlog' ) );
1536
1537                                 $text = wfMsg( 'deletedtext', $deleted, $loglink );
1538
1539                                 $wgOut->addHTML( '<p>' . $text . "</p>\n" );
1540                                 $wgOut->returnToMain( false );
1541                                 wfRunHooks('ArticleDeleteComplete', $this, $wgUser, $reason);
1542                         } else {
1543                                 $wgOut->fatalError( wfMsg( 'cannotdelete' ) );
1544                         }
1545                 }
1546         }
1547
1548         /**
1549          * Back-end article deletion
1550          * Deletes the article with database consistency, writes logs, purges caches
1551          * Returns success
1552          */
1553         function doDeleteArticle( $reason ) {
1554                 global $wgUser;
1555                 global  $wgUseSquid, $wgDeferredUpdateList, $wgInternalServer;
1556
1557                 $fname = 'Article::doDeleteArticle';
1558                 wfDebug( $fname."\n" );
1559
1560                 $dbw =& wfGetDB( DB_MASTER );
1561                 $ns = $this->mTitle->getNamespace();
1562                 $t = $this->mTitle->getDBkey();
1563                 $id = $this->mTitle->getArticleID();
1564
1565                 if ( $t == '' || $id == 0 ) {
1566                         return false;
1567                 }
1568
1569                 $u = new SiteStatsUpdate( 0, 1, -$this->isCountable( $this->getContent( true ) ) );
1570                 array_push( $wgDeferredUpdateList, $u );
1571
1572                 $linksTo = $this->mTitle->getLinksTo();
1573
1574                 # Squid purging
1575                 if ( $wgUseSquid ) {
1576                         $urls = array(
1577                                 $this->mTitle->getInternalURL(),
1578                                 $this->mTitle->getInternalURL( 'history' )
1579                         );
1580                         foreach ( $linksTo as $linkTo ) {
1581                                 $urls[] = $linkTo->getInternalURL();
1582                         }
1583
1584                         $u = new SquidUpdate( $urls );
1585                         array_push( $wgDeferredUpdateList, $u );
1586
1587                 }
1588
1589                 # Client and file cache invalidation
1590                 Title::touchArray( $linksTo );
1591
1592                 # Move article and history to the "archive" table
1593
1594                 $dbw->insertSelect( 'archive', array( 'page','revision', 'text' ),
1595                         array(
1596                                 'ar_namespace' => 'page_namespace',
1597                                 'ar_title' => 'page_title',
1598                                 'ar_text' => 'old_text',
1599                                 'ar_comment' => 'rev_comment',
1600                                 'ar_user' => 'rev_user',
1601                                 'ar_user_text' => 'rev_user_text',
1602                                 'ar_timestamp' => 'rev_timestamp',
1603                                 'ar_minor_edit' => 'rev_minor_edit',
1604                                 'ar_flags' => 0,
1605                         ), array(
1606                                 'page_namespace' => $ns,
1607                                 'page_title' => $t,
1608                                 'page_id = rev_page AND old_id = rev_id'
1609                         ), $fname
1610                 );
1611
1612                 # Now that it's safely backed up, delete it
1613
1614                 $dbw->deleteJoin( 'text', 'revision', 'old_id', 'rev_id', array( "rev_page = {$id}" ), $fname );
1615                 $dbw->delete( 'revision', array( 'rev_page' => $id ), $fname );
1616                 $dbw->delete( 'page', array( 'page_id' => $id ), $fname);
1617
1618                 $dbw->delete( 'recentchanges', array( 'rc_namespace' => $ns, 'rc_title' => $t ), $fname );
1619
1620                 # Finally, clean up the link tables
1621                 $t = $this->mTitle->getPrefixedDBkey();
1622
1623                 Article::onArticleDelete( $this->mTitle );
1624
1625                 # Insert broken links
1626                 $brokenLinks = array();
1627                 foreach ( $linksTo as $titleObj ) {
1628                         # Get article ID. Efficient because it was loaded into the cache by getLinksTo().
1629                         $linkID = $titleObj->getArticleID();
1630                         $brokenLinks[] = array( 'bl_from' => $linkID, 'bl_to' => $t );
1631                 }
1632                 $dbw->insert( 'brokenlinks', $brokenLinks, $fname, 'IGNORE' );
1633
1634                 # Delete live links
1635                 $dbw->delete( 'links', array( 'l_to' => $id ) );
1636                 $dbw->delete( 'links', array( 'l_from' => $id ) );
1637                 $dbw->delete( 'imagelinks', array( 'il_from' => $id ) );
1638                 $dbw->delete( 'brokenlinks', array( 'bl_from' => $id ) );
1639                 $dbw->delete( 'categorylinks', array( 'cl_from' => $id ) );
1640
1641                 # Log the deletion
1642                 $log = new LogPage( 'delete' );
1643                 $log->addEntry( 'delete', $this->mTitle, $reason );
1644
1645                 # Clear the cached article id so the interface doesn't act like we exist
1646                 $this->mTitle->resetArticleID( 0 );
1647                 $this->mTitle->mArticleID = 0;
1648                 return true;
1649         }
1650
1651         /**
1652          * Revert a modification
1653          */
1654         function rollback() {
1655                 global $wgUser, $wgOut, $wgRequest;
1656                 $fname = 'Article::rollback';
1657
1658                 if ( ! $wgUser->isAllowed('rollback') ) {
1659                         $wgOut->sysopRequired();
1660                         return;
1661                 }
1662                 if ( wfReadOnly() ) {
1663                         $wgOut->readOnlyPage( $this->getContent( true ) );
1664                         return;
1665                 }
1666                 $dbw =& wfGetDB( DB_MASTER );
1667
1668                 # Enhanced rollback, marks edits rc_bot=1
1669                 $bot = $wgRequest->getBool( 'bot' );
1670
1671                 # Replace all this user's current edits with the next one down
1672                 $tt = $this->mTitle->getDBKey();
1673                 $n = $this->mTitle->getNamespace();
1674
1675                 # Get the last editor, lock table exclusively
1676                 $s = $dbw->selectRow( array( 'page', 'revision' ),
1677                         array( 'page_id','rev_user','rev_user_text','rev_comment' ),
1678                         array( 'page_title' => $tt, 'page_namespace' => $n ),
1679                         $fname, 'FOR UPDATE'
1680                 );
1681                 if( $s === false ) {
1682                         # Something wrong
1683                         $wgOut->addHTML( wfMsg( 'notanarticle' ) );
1684                         return;
1685                 }
1686                 $ut = $dbw->strencode( $s->cur_user_text );
1687                 $uid = $s->rev_user;
1688                 $pid = $s->page_id;
1689
1690                 $from = str_replace( '_', ' ', $wgRequest->getVal( 'from' ) );
1691                 if( $from != $s->rev_user_text ) {
1692                         $wgOut->setPageTitle(wfmsg('rollbackfailed'));
1693                         $wgOut->addWikiText( wfMsg( 'alreadyrolled',
1694                                 htmlspecialchars( $this->mTitle->getPrefixedText()),
1695                                 htmlspecialchars( $from ),
1696                                 htmlspecialchars( $s->rev_user_text ) ) );
1697                         if($s->rev_comment != '') {
1698                                 $wgOut->addHTML(
1699                                         wfMsg('editcomment',
1700                                         htmlspecialchars( $s->rev_comment ) ) );
1701                         }
1702                         return;
1703                 }
1704
1705                 # Get the last edit not by this guy
1706                 $s = $dbw->selectRow( 'old',
1707                         array( 'old_text','old_user','old_user_text','old_timestamp','old_flags' ),
1708                         array(
1709                                 'old_namespace' => $n,
1710                                 'old_title' => $tt,
1711                                 "old_user <> {$uid} OR old_user_text <> '{$ut}'"
1712                         ), $fname, array( 'FOR UPDATE', 'USE INDEX' => 'name_title_timestamp' )
1713                 );
1714                 if( $s === false ) {
1715                         # Something wrong
1716                         $wgOut->setPageTitle(wfMsg('rollbackfailed'));
1717                         $wgOut->addHTML( wfMsg( 'cantrollback' ) );
1718                         return;
1719                 }
1720
1721                 if ( $bot ) {
1722                         # Mark all reverted edits as bot
1723                         $dbw->update( 'recentchanges',
1724                                 array( /* SET */
1725                                         'rc_bot' => 1
1726                                 ), array( /* WHERE */
1727                                         'rc_user' => $uid,
1728                                         "rc_timestamp > '{$s->old_timestamp}'",
1729                                 ), $fname
1730                         );
1731                 }
1732
1733                 # Save it!
1734                 $newcomment = wfMsg( 'revertpage', $s->old_user_text, $from );
1735                 $wgOut->setPagetitle( wfMsg( 'actioncomplete' ) );
1736                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
1737                 $wgOut->addHTML( '<h2>' . htmlspecialchars( $newcomment ) . "</h2>\n<hr />\n" );
1738                 $this->updateArticle( Revision::getRevisionText( $s ), $newcomment, 1, $this->mTitle->userIsWatching(), $bot );
1739                 Article::onArticleEdit( $this->mTitle );
1740                 $wgOut->returnToMain( false );
1741         }
1742
1743
1744         /**
1745          * Do standard deferred updates after page view
1746          * @private
1747          */
1748         function viewUpdates() {
1749                 global $wgDeferredUpdateList;
1750
1751                 if ( 0 != $this->getID() ) {
1752                         global $wgDisableCounters;
1753                         if( !$wgDisableCounters ) {
1754                                 Article::incViewCount( $this->getID() );
1755                                 $u = new SiteStatsUpdate( 1, 0, 0 );
1756                                 array_push( $wgDeferredUpdateList, $u );
1757                         }
1758                 }
1759
1760                 # Update newtalk status if user is reading their own
1761                 # talk page
1762
1763                 global $wgUser;
1764                 if ($this->mTitle->getNamespace() == NS_USER_TALK &&
1765                         $this->mTitle->getText() == $wgUser->getName()) {
1766                         require_once( 'UserTalkUpdate.php' );
1767                         $u = new UserTalkUpdate( 0, $this->mTitle->getNamespace(), $this->mTitle->getDBkey(), false, false, false );
1768                 }
1769         }
1770
1771         /**
1772          * Do standard deferred updates after page edit.
1773          * Every 1000th edit, prune the recent changes table.
1774          * @private
1775          * @param string $text
1776          */
1777         function editUpdates( $text, $summary, $minoredit, $timestamp_of_pagechange) {
1778                 global $wgDeferredUpdateList, $wgDBname, $wgMemc;
1779                 global $wgMessageCache, $wgUser;
1780
1781                 wfSeedRandom();
1782                 if ( 0 == mt_rand( 0, 999 ) ) {
1783                         # Periodically flush old entries from the recentchanges table.
1784                         global $wgRCMaxAge;
1785                         $dbw =& wfGetDB( DB_MASTER );
1786                         $cutoff = $dbw->timestamp( time() - $wgRCMaxAge );
1787                         $recentchanges = $dbw->tableName( 'recentchanges' );
1788                         $sql = "DELETE FROM $recentchanges WHERE rc_timestamp < '{$cutoff}'";
1789                         $dbw->query( $sql );
1790                 }
1791                 $id = $this->getID();
1792                 $title = $this->mTitle->getPrefixedDBkey();
1793                 $shortTitle = $this->mTitle->getDBkey();
1794
1795                 $adj = $this->mCountAdjustment;
1796
1797                 if ( 0 != $id ) {
1798                         $u = new LinksUpdate( $id, $title );
1799                         array_push( $wgDeferredUpdateList, $u );
1800                         $u = new SiteStatsUpdate( 0, 1, $adj );
1801                         array_push( $wgDeferredUpdateList, $u );
1802                         $u = new SearchUpdate( $id, $title, $text );
1803                         array_push( $wgDeferredUpdateList, $u );
1804
1805                         # If this is another user's talk page,
1806                         # create a watchlist entry for this page
1807
1808                         if ($this->mTitle->getNamespace() == NS_USER_TALK &&
1809                                 $shortTitle != $wgUser->getName()) {
1810                                 require_once( 'UserTalkUpdate.php' );
1811                                 $u = new UserTalkUpdate( 1, $this->mTitle->getNamespace(), $shortTitle, $summary, $minoredit, $timestamp_of_pagechange);
1812                         }
1813
1814                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
1815                                 $wgMessageCache->replace( $shortTitle, $text );
1816                         }
1817                 }
1818         }
1819
1820         /**
1821          * @todo document this function
1822          * @private
1823          * @param string $oldid         Revision ID of this article revision
1824          */
1825         function setOldSubtitle( $oldid=0 ) {
1826                 global $wgLang, $wgOut, $wgUser;
1827
1828                 $td = $wgLang->timeanddate( $this->mTimestamp, true );
1829                 $sk = $wgUser->getSkin();
1830                 $lnk = $sk->makeKnownLinkObj ( $this->mTitle, wfMsg( 'currentrevisionlink' ) );
1831                 $prevlink = $sk->makeKnownLinkObj( $this->mTitle, wfMsg( 'previousrevision' ), 'direction=prev&oldid='.$oldid );
1832                 $nextlink = $sk->makeKnownLinkObj( $this->mTitle, wfMsg( 'nextrevision' ), 'direction=next&oldid='.$oldid );
1833                 $r = wfMsg( 'revisionasofwithlink', $td, $lnk, $prevlink, $nextlink );
1834                 $wgOut->setSubtitle( $r );
1835         }
1836
1837         /**
1838          * This function is called right before saving the wikitext,
1839          * so we can do things like signatures and links-in-context.
1840          *
1841          * @param string $text
1842          */
1843         function preSaveTransform( $text ) {
1844                 global $wgParser, $wgUser;
1845                 return $wgParser->preSaveTransform( $text, $this->mTitle, $wgUser, ParserOptions::newFromUser( $wgUser ) );
1846         }
1847
1848         /* Caching functions */
1849
1850         /**
1851          * checkLastModified returns true if it has taken care of all
1852          * output to the client that is necessary for this request.
1853          * (that is, it has sent a cached version of the page)
1854          */
1855         function tryFileCache() {
1856                 static $called = false;
1857                 if( $called ) {
1858                         wfDebug( " tryFileCache() -- called twice!?\n" );
1859                         return;
1860                 }
1861                 $called = true;
1862                 if($this->isFileCacheable()) {
1863                         $touched = $this->mTouched;
1864                         $cache = new CacheManager( $this->mTitle );
1865                         if($cache->isFileCacheGood( $touched )) {
1866                                 global $wgOut;
1867                                 wfDebug( " tryFileCache() - about to load\n" );
1868                                 $cache->loadFromFileCache();
1869                                 return true;
1870                         } else {
1871                                 wfDebug( " tryFileCache() - starting buffer\n" );
1872                                 ob_start( array(&$cache, 'saveToFileCache' ) );
1873                         }
1874                 } else {
1875                         wfDebug( " tryFileCache() - not cacheable\n" );
1876                 }
1877         }
1878
1879         /**
1880          * Check if the page can be cached
1881          * @return bool
1882          */
1883         function isFileCacheable() {
1884                 global $wgUser, $wgUseFileCache, $wgShowIPinHeader, $wgRequest;
1885                 extract( $wgRequest->getValues( 'action', 'oldid', 'diff', 'redirect', 'printable' ) );
1886
1887                 return $wgUseFileCache
1888                         and (!$wgShowIPinHeader)
1889                         and ($this->getID() != 0)
1890                         and ($wgUser->getId() == 0)
1891                         and (!$wgUser->getNewtalk())
1892                         and ($this->mTitle->getNamespace() != NS_SPECIAL )
1893                         and (empty( $action ) || $action == 'view')
1894                         and (!isset($oldid))
1895                         and (!isset($diff))
1896                         and (!isset($redirect))
1897                         and (!isset($printable))
1898                         and (!$this->mRedirectedFrom);
1899         }
1900
1901         /**
1902          * Loads cur_touched and returns a value indicating if it should be used
1903          *
1904          */
1905         function checkTouched() {
1906                 $fname = 'Article::checkTouched';
1907                 $id = $this->getID();
1908                 $dbr =& $this->getDB();
1909                 $s = $dbr->selectRow( 'page', array( 'page_touched', 'page_is_redirect' ),
1910                         array( 'page_id' => $id ), $fname, $this->getSelectOptions() );
1911                 if( $s !== false ) {
1912                         $this->mTouched = wfTimestamp( TS_MW, $s->page_touched );
1913                         return !$s->page_is_redirect;
1914                 } else {
1915                         return false;
1916                 }
1917         }
1918
1919         /**
1920          * Edit an article without doing all that other stuff
1921          *
1922          * @param string $text text submitted
1923          * @param string $comment comment submitted
1924          * @param integer $minor whereas it's a minor modification
1925          */
1926         function quickEdit( $text, $comment = '', $minor = 0 ) {
1927                 global $wgUser;
1928                 $fname = 'Article::quickEdit';
1929
1930                 #wfDebugDieBacktrace( "$fname called." );
1931
1932                 wfProfileIn( $fname );
1933
1934                 $dbw =& wfGetDB( DB_MASTER );
1935                 $ns = $this->mTitle->getNamespace();
1936                 $dbkey = $this->mTitle->getDBkey();
1937                 $encDbKey = $dbw->strencode( $dbkey );
1938                 $timestamp = $dbw->timestamp();
1939                 # insert new text
1940                 $dbw->insert( 'text', array(
1941                                 'old_text' => $text,
1942                                 'old_flags' => "" ), $fname );
1943                 $text_id = $dbw->insertID();
1944
1945                 # update page
1946                 $dbw->update( 'page', array(
1947                         'page_is_new' => 0,
1948                         'page_touched' => $timestamp,
1949                         'page_is_redirect' => $this->isRedirect( $text ) ? 1 : 0,
1950                         'page_latest' => $text_id ),
1951                         array( 'page_namespace' => $ns, 'page_title' => $dbkey ), $fname );
1952                 # Retrieve page ID
1953                 $page_id = $dbw->selectField( 'page', 'page_id', array( 'page_namespace' => $ns, 'page_title' => $dbkey ), $fname );
1954
1955                 # update revision
1956                 $dbw->insert( 'revision', array(
1957                         'rev_id' => $text_id,
1958                         'rev_page' => $page_id,
1959                         'rev_comment' => $comment,
1960                         'rev_user' => $wgUser->getID(),
1961                         'rev_user_text' => $wgUser->getName(),
1962                         'rev_timestamp' => $timestamp,
1963                         'inverse_timestamp' => wfInvertTimestamp( $timestamp ),
1964                         'rev_minor_edit' => intval($minor) ),
1965                         $fname );
1966                 wfProfileOut( $fname );
1967         }
1968
1969         /**
1970          * Used to increment the view counter
1971          *
1972          * @static
1973          * @param integer $id article id
1974          */
1975         function incViewCount( $id ) {
1976                 $id = intval( $id );
1977                 global $wgHitcounterUpdateFreq;
1978
1979                 $dbw =& wfGetDB( DB_MASTER );
1980                 $pageTable = $dbw->tableName( 'page' );
1981                 $hitcounterTable = $dbw->tableName( 'hitcounter' );
1982                 $acchitsTable = $dbw->tableName( 'acchits' );
1983
1984                 if( $wgHitcounterUpdateFreq <= 1 ){ //
1985                         $dbw->query( "UPDATE $pageTable SET page_counter = page_counter + 1 WHERE page_id = $id" );
1986                         return;
1987                 }
1988
1989                 # Not important enough to warrant an error page in case of failure
1990                 $oldignore = $dbw->ignoreErrors( true );
1991
1992                 $dbw->query( "INSERT INTO $hitcounterTable (hc_id) VALUES ({$id})" );
1993
1994                 $checkfreq = intval( $wgHitcounterUpdateFreq/25 + 1 );
1995                 if( (rand() % $checkfreq != 0) or ($dbw->lastErrno() != 0) ){
1996                         # Most of the time (or on SQL errors), skip row count check
1997                         $dbw->ignoreErrors( $oldignore );
1998                         return;
1999                 }
2000
2001                 $res = $dbw->query("SELECT COUNT(*) as n FROM $hitcounterTable");
2002                 $row = $dbw->fetchObject( $res );
2003                 $rown = intval( $row->n );
2004                 if( $rown >= $wgHitcounterUpdateFreq ){
2005                         wfProfileIn( 'Article::incViewCount-collect' );
2006                         $old_user_abort = ignore_user_abort( true );
2007
2008                         $dbw->query("LOCK TABLES $hitcounterTable WRITE");
2009                         $dbw->query("CREATE TEMPORARY TABLE $acchitsTable TYPE=HEAP ".
2010                                 "SELECT hc_id,COUNT(*) AS hc_n FROM $hitcounterTable ".
2011                                 'GROUP BY hc_id');
2012                         $dbw->query("DELETE FROM $hitcounterTable");
2013                         $dbw->query('UNLOCK TABLES');
2014                         $dbw->query("UPDATE $curTable,$acchitsTable SET cur_counter=cur_counter + hc_n ".
2015                                 'WHERE cur_id = hc_id');
2016                         $dbw->query("DROP TABLE $acchitsTable");
2017
2018                         ignore_user_abort( $old_user_abort );
2019                         wfProfileOut( 'Article::incViewCount-collect' );
2020                 }
2021                 $dbw->ignoreErrors( $oldignore );
2022         }
2023
2024         /**#@+
2025          * The onArticle*() functions are supposed to be a kind of hooks
2026          * which should be called whenever any of the specified actions
2027          * are done.
2028          *
2029          * This is a good place to put code to clear caches, for instance.
2030          *
2031          * This is called on page move and undelete, as well as edit
2032          * @static
2033          * @param $title_obj a title object
2034          */
2035
2036         function onArticleCreate($title_obj) {
2037                 global $wgUseSquid, $wgDeferredUpdateList;
2038
2039                 $titles = $title_obj->getBrokenLinksTo();
2040
2041                 # Purge squid
2042                 if ( $wgUseSquid ) {
2043                         $urls = $title_obj->getSquidURLs();
2044                         foreach ( $titles as $linkTitle ) {
2045                                 $urls[] = $linkTitle->getInternalURL();
2046                         }
2047                         $u = new SquidUpdate( $urls );
2048                         array_push( $wgDeferredUpdateList, $u );
2049                 }
2050
2051                 # Clear persistent link cache
2052                 LinkCache::linksccClearBrokenLinksTo( $title_obj->getPrefixedDBkey() );
2053         }
2054
2055         function onArticleDelete($title_obj) {
2056                 LinkCache::linksccClearLinksTo( $title_obj->getArticleID() );
2057         }
2058         function onArticleEdit($title_obj) {
2059                 LinkCache::linksccClearPage( $title_obj->getArticleID() );
2060         }
2061         /**#@-*/
2062
2063         /**
2064          * Info about this page
2065          */
2066         function info() {
2067                 global $wgUser, $wgTitle, $wgOut, $wgAllowPageInfo;
2068                 $fname = 'Article::info';
2069
2070 wfDebugDieBacktrace( 'This function is apparently not called by any other PHP file and might be obsolete.' );
2071
2072                 if ( !$wgAllowPageInfo ) {
2073                         $wgOut->errorpage( 'nosuchaction', 'nosuchactiontext' );
2074                         return;
2075                 }
2076
2077                 $dbr =& $this->getDB();
2078
2079                 $basenamespace = $wgTitle->getNamespace() & (~1);
2080                 $cur_clause = array( 'cur_title' => $wgTitle->getDBkey(), 'cur_namespace' => $basenamespace );
2081                 $old_clause = array( 'old_title' => $wgTitle->getDBkey(), 'old_namespace' => $basenamespace );
2082                 $wl_clause  = array( 'wl_title' => $wgTitle->getDBkey(), 'wl_namespace' => $basenamespace );
2083                 $fullTitle = $wgTitle->makeName($basenamespace, $wgTitle->getDBKey());
2084                 $wgOut->setPagetitle(  $fullTitle );
2085                 $wgOut->setSubtitle( wfMsg( 'infosubtitle' ));
2086
2087                 # first, see if the page exists at all.
2088                 $exists = $dbr->selectField( 'cur', 'COUNT(*)', $cur_clause, $fname, $this->getSelectOptions() );
2089                 if ($exists < 1) {
2090                         $wgOut->addHTML( wfMsg('noarticletext') );
2091                 } else {
2092                         $numwatchers = $dbr->selectField( 'watchlist', 'COUNT(*)', $wl_clause, $fname,
2093                                 $this->getSelectOptions() );
2094                         $wgOut->addHTML( "<ul><li>" . wfMsg("numwatchers", $numwatchers) . '</li>' );
2095                         $old = $dbr->selectField( 'old', 'COUNT(*)', $old_clause, $fname, $this->getSelectOptions() );
2096                         $wgOut->addHTML( "<li>" . wfMsg('numedits', $old + 1) . '</li>');
2097
2098                         # to find number of distinct authors, we need to do some
2099                         # funny stuff because of the cur/old table split:
2100                         # - first, find the name of the 'cur' author
2101                         # - then, find the number of *other* authors in 'old'
2102
2103                         # find 'cur' author
2104                         $cur_author = $dbr->selectField( 'cur', 'cur_user_text', $cur_clause, $fname,
2105                                 $this->getSelectOptions() );
2106
2107                         # find number of 'old' authors excluding 'cur' author
2108                         $authors = $dbr->selectField( 'old', 'COUNT(DISTINCT old_user_text)',
2109                                 $old_clause + array( 'old_user_text<>' . $dbr->addQuotes( $cur_author ) ), $fname,
2110                                 $this->getSelectOptions() ) + 1;
2111
2112                         # now for the Talk page ...
2113                         $cur_clause = array( 'cur_title' => $wgTitle->getDBkey(), 'cur_namespace' => $basenamespace+1 );
2114                         $old_clause = array( 'old_title' => $wgTitle->getDBkey(), 'old_namespace' => $basenamespace+1 );
2115
2116                         # does it exist?
2117                         $exists = $dbr->selectField( 'cur', 'COUNT(*)', $cur_clause, $fname, $this->getSelectOptions() );
2118
2119                         # number of edits
2120                         if ($exists > 0) {
2121                                 $old = $dbr->selectField( 'old', 'COUNT(*)', $old_clause, $fname, $this->getSelectOptions() );
2122                                 $wgOut->addHTML( '<li>' . wfMsg("numtalkedits", $old + 1) . '</li>');
2123                         }
2124                         $wgOut->addHTML( '<li>' . wfMsg("numauthors", $authors) . '</li>' );
2125
2126                         # number of authors
2127                         if ($exists > 0) {
2128                                 $cur_author = $dbr->selectField( 'cur', 'cur_user_text', $cur_clause, $fname,
2129                                         $this->getSelectOptions() );
2130                                 $authors = $dbr->selectField( 'cur', 'COUNT(DISTINCT old_user_text)',
2131                                         $old_clause + array( 'old_user_text<>' . $dbr->addQuotes( $cur_author ) ),
2132                                         $fname, $this->getSelectOptions() );
2133
2134                                 $wgOut->addHTML( '<li>' . wfMsg('numtalkauthors', $authors) . '</li></ul>' );
2135                         }
2136                 }
2137         }
2138 }
2139
2140 /**
2141  * Check whether an article is a stub
2142  *
2143  * @public
2144  * @param integer $articleID    ID of the article that is to be checked
2145  */
2146 function wfArticleIsStub( $articleID ) {
2147         global $wgUser;
2148         $fname = 'wfArticleIsStub';
2149
2150         wfDebugDieBacktrace( 'This function seems to be unused. Pending removal.' );
2151
2152         $threshold = $wgUser->getOption('stubthreshold') ;
2153         if ( $threshold > 0 ) {
2154                 $dbr =& wfGetDB( DB_SLAVE );
2155                 $s = $dbr->selectRow( array('page', 'text'),
2156                         array( 'LENGTH(old_text) AS len', 'page_namespace', 'page_is_redirect' ),
2157                         array( 'page_id' => $articleID, "page.page_latest=text.old_id" ),
2158                         $fname ) ;
2159                 if ( $s == false OR $s->page_is_redirect OR $s->page_namespace != NS_MAIN ) {
2160                         return false;
2161                 }
2162                 $size = $s->len;
2163                 return ( $size < $threshold );
2164         }
2165         return false;
2166 }
2167
2168 ?>