includes/Article.php

   1 <?
   2 # Class representing a Wikipedia article and history.
   3 # See design.doc for an overview.
   4
   5 # Note: edit user interface and cache support functions have been
   6 # moved to separate EditPage and CacheManager classes.
   7
   8 class Article {
   9         /* private */ var $mContent, $mContentLoaded;
  10         /* private */ var $mUser, $mTimestamp, $mUserText;
  11         /* private */ var $mCounter, $mComment, $mCountAdjustment;
  12         /* private */ var $mMinorEdit, $mRedirectedFrom;
  13         /* private */ var $mTouched, $mFileCache;
  14
  15         function Article() { $this->clear(); }
  16
  17         /* private */ function clear()
  18         {
  19                 $this->mContentLoaded = false;
  20                 $this->mUser = $this->mCounter = -1; # Not loaded
  21                 $this->mRedirectedFrom = $this->mUserText =
  22                 $this->mTimestamp = $this->mComment = $this->mFileCache = "";
  23                 $this->mCountAdjustment = 0;
  24                 $this->mTouched = "19700101000000";
  25         }
  26
  27         /* static */ function newFromID( $newid )
  28         {
  29                 global $wgOut, $wgTitle, $wgArticle;
  30                 $a = new Article();
  31                 $n = Article::nameOf( $newid );
  32
  33                 $wgTitle = Title::newFromDBkey( $n );
  34                 $wgTitle->resetArticleID( $newid );
  35
  36                 return $a;
  37         }
  38
  39         /* static */ function nameOf( $id )
  40         {
  41                 $sql = "SELECT cur_namespace,cur_title FROM cur WHERE " .
  42                   "cur_id={$id}";
  43                 $res = wfQuery( $sql, "Article::nameOf" );
  44                 if ( 0 == wfNumRows( $res ) ) { return NULL; }
  45
  46                 $s = wfFetchObject( $res );
  47                 $n = Title::makeName( $s->cur_namespace, $s->cur_title );
  48                 return $n;
  49         }
  50
  51         # Note that getContent/loadContent may follow redirects if
  52         # not told otherwise, and so may cause a change to wgTitle.
  53
  54         function getContent( $noredir = false )
  55         {
  56                 global $action,$section,$count,$wgTitle; # From query string
  57                 wfProfileIn( "Article::getContent" );
  58
  59                 if ( 0 == $this->getID() ) {
  60                         if ( "edit" == $action ) {
  61
  62                                 global $wgTitle;
  63                                 return ""; # was "newarticletext", now moved above the box)
  64
  65
  66                         }
  67                         wfProfileOut();
  68                         return wfMsg( "noarticletext" );
  69                 } else {
  70                         $this->loadContent( $noredir );
  71                         wfProfileOut();
  72
  73                         if(
  74                                 # check if we're displaying a [[User talk:x.x.x.x]] anonymous talk page
  75                                 ( $wgTitle->getNamespace() == Namespace::getTalk( Namespace::getUser()) ) &&
  76                                   preg_match("/^\d{1,3}\.\d{1,3}.\d{1,3}\.\d{1,3}$/",$wgTitle->getText()) &&
  77                                   $action=="view"
  78                                 )
  79                                 {
  80                                 return $this->mContent . "\n" .wfMsg("anontalkpagetext"); }
  81                         else {
  82                                 if($action=="edit") {
  83                                         if($section!="") {
  84                                                 if($section=="new") { return ""; }
  85
  86                                                 $secs=preg_split("/(^=+.*?=+|^<h[1-6].*?>.*?<\/h[1-6].*?>)/mi",
  87                                                  $this->mContent, -1,
  88                                                  PREG_SPLIT_DELIM_CAPTURE);
  89                                                 if($section==0) {
  90                                                         return trim($secs[0]);
  91                                                 } else {
  92                                                         return trim($secs[$section*2-1] . $secs[$section*2]);
  93                                                 }
  94                                         }
  95                                 }
  96                                 return $this->mContent;
  97                         }
  98                 }
  99         }
 100
 101         function loadContent( $noredir = false )
 102         {
 103                 global $wgOut, $wgTitle;
 104                 global $oldid, $redirect; # From query
 105
 106                 if ( $this->mContentLoaded ) return;
 107                 $fname = "Article::loadContent";
 108
 109                 # Pre-fill content with error message so that if something
 110                 # fails we'll have something telling us what we intended.
 111
 112                 $t = $wgTitle->getPrefixedText();
 113                 if ( $oldid ) { $t .= ",oldid={$oldid}"; }
 114                 if ( $redirect ) { $t .= ",redirect={$redirect}"; }
 115                 $this->mContent = str_replace( "$1", $t, wfMsg( "missingarticle" ) );
 116
 117                 if ( ! $oldid ) {       # Retrieve current version
 118                         $id = $this->getID();
 119                         if ( 0 == $id ) return;
 120
 121                         $sql = "SELECT " .
 122                           "cur_text,cur_timestamp,cur_user,cur_counter,cur_restrictions,cur_touched " .
 123                           "FROM cur WHERE cur_id={$id}";
 124                         $res = wfQuery( $sql, $fname );
 125                         if ( 0 == wfNumRows( $res ) ) { return; }
 126
 127                         $s = wfFetchObject( $res );
 128
 129                         # If we got a redirect, follow it (unless we've been told
 130                         # not to by either the function parameter or the query
 131
 132                         if ( ( "no" != $redirect ) && ( false == $noredir ) &&
 133                           ( preg_match( "/^#redirect/i", $s->cur_text ) ) ) {
 134                                 if ( preg_match( "/\\[\\[([^\\]\\|]+)[\\]\\|]/",
 135                                   $s->cur_text, $m ) ) {
 136                                         $rt = Title::newFromText( $m[1] );
 137
 138                                         # Gotta hand redirects to special pages differently:
 139                                         # Fill the HTTP response "Location" header and ignore
 140                                         # the rest of the page we're on.
 141
 142                                         if ( $rt->getInterwiki() != "" ) {
 143                                                 $wgOut->redirect( $rt->getFullURL() ) ;
 144                                                 return;
 145                                         }
 146                                         if ( $rt->getNamespace() == Namespace::getSpecial() ) {
 147                                                 $wgOut->redirect( wfLocalUrl(
 148                                                   $rt->getPrefixedURL() ) );
 149                                                 return;
 150                                         }
 151                                         $rid = $rt->getArticleID();
 152                                         if ( 0 != $rid ) {
 153                                                 $sql = "SELECT cur_text,cur_timestamp,cur_user," .
 154                                                   "cur_counter,cur_touched FROM cur WHERE cur_id={$rid}";
 155                                                 $res = wfQuery( $sql, $fname );
 156
 157                                                 if ( 0 != wfNumRows( $res ) ) {
 158                                                         $this->mRedirectedFrom = $wgTitle->getPrefixedText();
 159                                                         $wgTitle = $rt;
 160                                                         $s = wfFetchObject( $res );
 161                                                 }
 162                                         }
 163                                 }
 164                         }
 165                         $this->mContent = $s->cur_text;
 166                         $this->mUser = $s->cur_user;
 167                         $this->mCounter = $s->cur_counter;
 168                         $this->mTimestamp = $s->cur_timestamp;
 169                         $this->mTouched = $s->cur_touched;
 170                         $wgTitle->mRestrictions = explode( ",", trim( $s->cur_restrictions ) );
 171                         $wgTitle->mRestrictionsLoaded = true;
 172                         wfFreeResult( $res );
 173                 } else { # oldid set, retrieve historical version
 174                         $sql = "SELECT old_text,old_timestamp,old_user FROM old " .
 175                           "WHERE old_id={$oldid}";
 176                         $res = wfQuery( $sql, $fname );
 177                         if ( 0 == wfNumRows( $res ) ) { return; }
 178
 179                         $s = wfFetchObject( $res );
 180                         $this->mContent = $s->old_text;
 181                         $this->mUser = $s->old_user;
 182                         $this->mCounter = 0;
 183                         $this->mTimestamp = $s->old_timestamp;
 184                         wfFreeResult( $res );
 185                 }
 186                 $this->mContentLoaded = true;
 187         }
 188
 189         function getID() { global $wgTitle; return $wgTitle->getArticleID(); }
 190
 191         function getCount()
 192         {
 193                 if ( -1 == $this->mCounter ) {
 194                         $id = $this->getID();
 195                         $this->mCounter = wfGetSQL( "cur", "cur_counter", "cur_id={$id}" );
 196                 }
 197                 return $this->mCounter;
 198         }
 199
 200         # Would the given text make this article a "good" article (i.e.,
 201         # suitable for including in the article count)?
 202
 203         function isCountable( $text )
 204         {
 205                 global $wgTitle, $wgUseCommaCount;
 206
 207                 if ( 0 != $wgTitle->getNamespace() ) { return 0; }
 208                 if ( preg_match( "/^#redirect/i", $text ) ) { return 0; }
 209                 $token = ($wgUseCommaCount ? "," : "[[" );
 210                 if ( false === strstr( $text, $token ) ) { return 0; }
 211                 return 1;
 212         }
 213
 214         # Load the field related to the last edit time of the article.
 215         # This isn't necessary for all uses, so it's only done if needed.
 216
 217         /* private */ function loadLastEdit()
 218         {
 219                 global $wgOut;
 220                 if ( -1 != $this->mUser ) return;
 221
 222                 $sql = "SELECT cur_user,cur_user_text,cur_timestamp," .
 223                   "cur_comment,cur_minor_edit FROM cur WHERE " .
 224                   "cur_id=" . $this->getID();
 225                 $res = wfQuery( $sql, "Article::loadLastEdit" );
 226
 227                 if ( wfNumRows( $res ) > 0 ) {
 228                         $s = wfFetchObject( $res );
 229                         $this->mUser = $s->cur_user;
 230                         $this->mUserText = $s->cur_user_text;
 231                         $this->mTimestamp = $s->cur_timestamp;
 232                         $this->mComment = $s->cur_comment;
 233                         $this->mMinorEdit = $s->cur_minor_edit;
 234                 }
 235         }
 236
 237         function getTimestamp()
 238         {
 239                 $this->loadLastEdit();
 240                 return $this->mTimestamp;
 241         }
 242
 243         function getUser()
 244         {
 245                 $this->loadLastEdit();
 246                 return $this->mUser;
 247         }
 248
 249         function getUserText()
 250         {
 251                 $this->loadLastEdit();
 252                 return $this->mUserText;
 253         }
 254
 255         function getComment()
 256         {
 257                 $this->loadLastEdit();
 258                 return $this->mComment;
 259         }
 260
 261         function getMinorEdit()
 262         {
 263                 $this->loadLastEdit();
 264                 return $this->mMinorEdit;
 265         }
 266
 267         # This is the default action of the script: just view the page of
 268         # the given title.
 269
 270         function view()
 271         {
 272                 global $wgUser, $wgOut, $wgTitle, $wgLang;
 273                 global $oldid, $diff; # From query
 274                 global $wgLinkCache;
 275                 wfProfileIn( "Article::view" );
 276
 277                 $wgOut->setArticleFlag( true );
 278                 $wgOut->setRobotpolicy( "index,follow" );
 279
 280                 # If we got diff and oldid in the query, we want to see a
 281                 # diff page instead of the article.
 282
 283                 if ( isset( $diff ) ) {
 284                         $wgOut->setPageTitle( $wgTitle->getPrefixedText() );
 285                         $de = new DifferenceEngine( $oldid, $diff );
 286                         $de->showDiffPage();
 287                         wfProfileOut();
 288                         return;
 289                 }
 290                 $text = $this->getContent(); # May change wgTitle!
 291                 $wgOut->setPageTitle( $wgTitle->getPrefixedText() );
 292                 $wgOut->setHTMLTitle( $wgTitle->getPrefixedText() .
 293                   " - " . wfMsg( "wikititlesuffix" ) );
 294
 295                 # We're looking at an old revision
 296
 297                 if ( $oldid ) {
 298                         $this->setOldSubtitle();
 299                         $wgOut->setRobotpolicy( "noindex,follow" );
 300                 }
 301                 if ( "" != $this->mRedirectedFrom ) {
 302                         $sk = $wgUser->getSkin();
 303                         $redir = $sk->makeKnownLink( $this->mRedirectedFrom, "",
 304                           "redirect=no" );
 305                         $s = str_replace( "$1", $redir, wfMsg( "redirectedfrom" ) );
 306                         $wgOut->setSubtitle( $s );
 307                 }
 308                 $wgOut->checkLastModified( $this->mTouched );
 309                 $this->tryFileCache();
 310                 $wgLinkCache->preFill( $wgTitle );
 311                 $wgOut->addWikiText( $text );
 312
 313                 # If the article we've just shown is in the "Image" namespace,
 314                 # follow it with the history list and link list for the image
 315                 # it describes.
 316
 317                 if ( Namespace::getImage() == $wgTitle->getNamespace() ) {
 318                         $this->imageHistory();
 319                         $this->imageLinks();
 320                 }
 321                 $this->viewUpdates();
 322                 wfProfileOut();
 323         }
 324
 325         # Theoretically we could defer these whole insert and update
 326         # functions for after display, but that's taking a big leap
 327         # of faith, and we want to be able to report database
 328         # errors at some point.
 329
 330         /* private */ function insertNewArticle( $text, $summary, $isminor, $watchthis )
 331         {
 332                 global $wgOut, $wgUser, $wgTitle, $wgLinkCache;
 333                 $fname = "Article::insertNewArticle";
 334
 335                 $ns = $wgTitle->getNamespace();
 336                 $ttl = $wgTitle->getDBkey();
 337                 $text = $this->preSaveTransform( $text );
 338                 if ( preg_match( "/^#redirect/i", $text ) ) { $redir = 1; }
 339                 else { $redir = 0; }
 340
 341                 $now = wfTimestampNow();
 342                 $won = wfInvertTimestamp( $now );
 343                 wfSeedRandom();
 344                 $rand = number_format( mt_rand() / mt_getrandmax(), 12, ".", "" );
 345                 $sql = "INSERT INTO cur (cur_namespace,cur_title,cur_text," .
 346                   "cur_comment,cur_user,cur_timestamp,cur_minor_edit,cur_counter," .
 347                   "cur_restrictions,cur_user_text,cur_is_redirect," .
 348                   "cur_is_new,cur_random,cur_touched,inverse_timestamp) VALUES ({$ns},'" . wfStrencode( $ttl ) . "', '" .
 349                   wfStrencode( $text ) . "', '" .
 350                   wfStrencode( $summary ) . "', '" .
 351                   $wgUser->getID() . "', '{$now}', " .
 352                   ( $isminor ? 1 : 0 ) . ", 0, '', '" .
 353                   wfStrencode( $wgUser->getName() ) . "', $redir, 1, $rand, '{$now}', '{$won}')";
 354                 $res = wfQuery( $sql, $fname );
 355
 356                 $newid = wfInsertId();
 357                 $wgTitle->resetArticleID( $newid );
 358
 359                 $sql = "INSERT INTO recentchanges (rc_timestamp,rc_cur_time," .
 360                   "rc_namespace,rc_title,rc_new,rc_minor,rc_cur_id,rc_user," .
 361                   "rc_user_text,rc_comment,rc_this_oldid,rc_last_oldid,rc_bot) VALUES (" .
 362                   "'{$now}','{$now}',{$ns},'" . wfStrencode( $ttl ) . "',1," .
 363                   ( $isminor ? 1 : 0 ) . ",{$newid}," . $wgUser->getID() . ",'" .
 364                   wfStrencode( $wgUser->getName() ) . "','" .
 365                   wfStrencode( $summary ) . "',0,0," .
 366                   ( $wgUser->isBot() ? 1 : 0 ) . ")";
 367                 wfQuery( $sql, $fname );
 368                 if ($watchthis) {
 369                         if(!$wgTitle->userIsWatching()) $this->watch();
 370                 } else {
 371                         if ( $wgTitle->userIsWatching() ) {
 372                                 $this->unwatch();
 373                         }
 374                 }
 375
 376                 $this->showArticle( $text, wfMsg( "newarticle" ) );
 377         }
 378
 379         function updateArticle( $text, $summary, $minor, $watchthis, $section )
 380         {
 381                 global $wgOut, $wgUser, $wgTitle, $wgLinkCache;
 382                 global $wgDBtransactions;
 383                 $fname = "Article::updateArticle";
 384                 // insert updated section into old text if we have only edited part
 385                 // of the article
 386                 if ($section != "") {
 387                         $oldtext=$this->getContent();
 388                         if($section=="new") {
 389                                 if($summary) $subject="== {$summary} ==\n\n";
 390                                 $text=$oldtext."\n\n".$subject.$text;
 391                         } else {
 392                                 $secs=preg_split("/(^=+.*?=+|^<h[1-6].*?>.*?<\/h[1-6].*?>)/mi",
 393                                   $oldtext,-1,PREG_SPLIT_DELIM_CAPTURE);
 394                                 $secs[$section*2]=$text."\n\n"; // replace with edited
 395                                 if($section) { $secs[$section*2-1]=""; } // erase old headline
 396                                 $text=join("",$secs);
 397                         }
 398                 }
 399                 if ( $this->mMinorEdit ) { $me1 = 1; } else { $me1 = 0; }
 400                 if ( $minor ) { $me2 = 1; } else { $me2 = 0; }
 401                 if ( preg_match( "/^(#redirect[^\\n]+)/i", $text, $m ) ) {
 402                         $redir = 1;
 403                         $text = $m[1] . "\n"; # Remove all content but redirect
 404                 }
 405                 else { $redir = 0; }
 406                 $this->loadLastEdit();
 407
 408                 $text = $this->preSaveTransform( $text );
 409
 410                 # Update article, but only if changed.
 411
 412                 if( $wgDBtransactions ) {
 413                         $sql = "BEGIN";
 414                         wfQuery( $sql );
 415                 }
 416                 $oldtext = $this->getContent( true );
 417
 418                 if ( 0 != strcmp( $text, $oldtext ) ) {
 419                         $this->mCountAdjustment = $this->isCountable( $text )
 420                           - $this->isCountable( $oldtext );
 421
 422                         $sql = "INSERT INTO old (old_namespace,old_title,old_text," .
 423                           "old_comment,old_user,old_user_text,old_timestamp," .
 424                           "old_minor_edit,inverse_timestamp) VALUES (" .
 425                           $wgTitle->getNamespace() . ", '" .
 426                           wfStrencode( $wgTitle->getDBkey() ) . "', '" .
 427                           wfStrencode( $oldtext ) . "', '" .
 428                           wfStrencode( $this->getComment() ) . "', " .
 429                           $this->getUser() . ", '" .
 430                           wfStrencode( $this->getUserText() ) . "', '" .
 431                           $this->getTimestamp() . "', " . $me1 . ", '" .
 432                           wfInvertTimestamp( $this->getTimestamp() ) . "')";
 433                         $res = wfQuery( $sql, $fname );
 434                         $oldid = wfInsertID( $res );
 435
 436                         $now = wfTimestampNow();
 437                         $won = wfInvertTimestamp( $now );
 438                         $sql = "UPDATE cur SET cur_text='" . wfStrencode( $text ) .
 439                           "',cur_comment='" .  wfStrencode( $summary ) .
 440                           "',cur_minor_edit={$me2}, cur_user=" . $wgUser->getID() .
 441                           ",cur_timestamp='{$now}',cur_user_text='" .
 442                           wfStrencode( $wgUser->getName() ) .
 443                           "',cur_is_redirect={$redir}, cur_is_new=0, cur_touched='{$now}', inverse_timestamp='{$won}' " .
 444                           "WHERE cur_id=" . $this->getID();
 445                         wfQuery( $sql, $fname );
 446
 447                         $sql = "INSERT INTO recentchanges (rc_timestamp,rc_cur_time," .
 448                           "rc_namespace,rc_title,rc_new,rc_minor,rc_bot,rc_cur_id,rc_user," .
 449                           "rc_user_text,rc_comment,rc_this_oldid,rc_last_oldid) VALUES (" .
 450                           "'{$now}','{$now}'," . $wgTitle->getNamespace() . ",'" .
 451                           wfStrencode( $wgTitle->getDBkey() ) . "',0,{$me2}," .
 452                           ( $wgUser->isBot() ? 1 : 0 ) . "," .
 453                           $this->getID() . "," . $wgUser->getID() . ",'" .
 454                           wfStrencode( $wgUser->getName() ) . "','" .
 455                           wfStrencode( $summary ) . "',0,{$oldid})";
 456                         wfQuery( $sql, $fname );
 457
 458                         $sql = "UPDATE recentchanges SET rc_this_oldid={$oldid} " .
 459                           "WHERE rc_namespace=" . $wgTitle->getNamespace() . " AND " .
 460                           "rc_title='" . wfStrencode( $wgTitle->getDBkey() ) . "' AND " .
 461                           "rc_timestamp='" . $this->getTimestamp() . "'";
 462                         wfQuery( $sql, $fname );
 463
 464                         $sql = "UPDATE recentchanges SET rc_cur_time='{$now}' " .
 465                           "WHERE rc_cur_id=" . $this->getID();
 466                         wfQuery( $sql, $fname );
 467                 }
 468                 if( $wgDBtransactions ) {
 469                         $sql = "COMMIT";
 470                         wfQuery( $sql );
 471                 }
 472
 473                 if ($watchthis) {
 474                         if (!$wgTitle->userIsWatching()) $this->watch();
 475                 } else {
 476                         if ( $wgTitle->userIsWatching() ) {
 477                                 $this->unwatch();
 478                         }
 479                 }
 480
 481                 $this->showArticle( $text, wfMsg( "updated" ) );
 482         }
 483
 484         # After we've either updated or inserted the article, update
 485         # the link tables and redirect to the new page.
 486
 487         function showArticle( $text, $subtitle )
 488         {
 489                 global $wgOut, $wgTitle, $wgUser, $wgLinkCache, $wgUseBetterLinksUpdate;
 490
 491                 $wgLinkCache = new LinkCache();
 492
 493                 # Get old version of link table to allow incremental link updates
 494                 if ( $wgUseBetterLinksUpdate ) {
 495                         $wgLinkCache->preFill( $wgTitle );
 496                         $wgLinkCache->clear();
 497                 }
 498
 499                 # Now update the link cache by parsing the text
 500                 $wgOut->addWikiText( $text );
 501
 502                 $this->editUpdates( $text );
 503                 if( preg_match( "/^#redirect/i", $text ) )
 504                         $r = "redirect=no";
 505                 else
 506                         $r = "";
 507                 $wgOut->redirect( wfLocalUrl( $wgTitle->getPrefixedURL(), $r ) );
 508         }
 509
 510         # If the page we've just displayed is in the "Image" namespace,
 511         # we follow it with an upload history of the image and its usage.
 512
 513         function imageHistory()
 514         {
 515                 global $wgUser, $wgOut, $wgLang, $wgTitle;
 516                 $fname = "Article::imageHistory";
 517
 518                 $sql = "SELECT img_size,img_description,img_user," .
 519                   "img_user_text,img_timestamp FROM image WHERE " .
 520                   "img_name='" . wfStrencode( $wgTitle->getDBkey() ) . "'";
 521                 $res = wfQuery( $sql, $fname );
 522
 523                 if ( 0 == wfNumRows( $res ) ) { return; }
 524
 525                 $sk = $wgUser->getSkin();
 526                 $s = $sk->beginImageHistoryList();
 527
 528                 $line = wfFetchObject( $res );
 529                 $s .= $sk->imageHistoryLine( true, $line->img_timestamp,
 530                   $wgTitle->getText(),  $line->img_user,
 531                   $line->img_user_text, $line->img_size, $line->img_description );
 532
 533                 $sql = "SELECT oi_size,oi_description,oi_user," .
 534                   "oi_user_text,oi_timestamp,oi_archive_name FROM oldimage WHERE " .
 535                   "oi_name='" . wfStrencode( $wgTitle->getDBkey() ) . "' " .
 536                   "ORDER BY oi_timestamp DESC";
 537                 $res = wfQuery( $sql, $fname );
 538
 539                 while ( $line = wfFetchObject( $res ) ) {
 540                         $s .= $sk->imageHistoryLine( false, $line->oi_timestamp,
 541                           $line->oi_archive_name, $line->oi_user,
 542                           $line->oi_user_text, $line->oi_size, $line->oi_description );
 543                 }
 544                 $s .= $sk->endImageHistoryList();
 545                 $wgOut->addHTML( $s );
 546         }
 547
 548         function imageLinks()
 549         {
 550                 global $wgUser, $wgOut, $wgTitle;
 551
 552                 $wgOut->addHTML( "<h2>" . wfMsg( "imagelinks" ) . "</h2>\n" );
 553
 554                 $sql = "SELECT il_from FROM imagelinks WHERE il_to='" .
 555                   wfStrencode( $wgTitle->getDBkey() ) . "'";
 556                 $res = wfQuery( $sql, "Article::imageLinks" );
 557
 558                 if ( 0 == wfNumRows( $res ) ) {
 559                         $wgOut->addHtml( "<p>" . wfMsg( "nolinkstoimage" ) . "\n" );
 560                         return;
 561                 }
 562                 $wgOut->addHTML( "<p>" . wfMsg( "linkstoimage" ) .  "\n<ul>" );
 563
 564                 $sk = $wgUser->getSkin();
 565                 while ( $s = wfFetchObject( $res ) ) {
 566                         $name = $s->il_from;
 567                         $link = $sk->makeKnownLink( $name, "" );
 568                         $wgOut->addHTML( "<li>{$link}</li>\n" );
 569                 }
 570                 $wgOut->addHTML( "</ul>\n" );
 571         }
 572
 573         # Add this page to my watchlist
 574
 575         function watch()
 576         {
 577                 global $wgUser, $wgTitle, $wgOut, $wgLang;
 578                 global $wgDeferredUpdateList;
 579
 580                 if ( 0 == $wgUser->getID() ) {
 581                         $wgOut->errorpage( "watchnologin", "watchnologintext" );
 582                         return;
 583                 }
 584                 if ( wfReadOnly() ) {
 585                         $wgOut->readOnlyPage();
 586                         return;
 587                 }
 588                 $wgUser->addWatch( $wgTitle );
 589
 590                 $wgOut->setPagetitle( wfMsg( "addedwatch" ) );
 591                 $wgOut->setRobotpolicy( "noindex,follow" );
 592
 593                 $sk = $wgUser->getSkin() ;
 594                 $link = $sk->makeKnownLink ( $wgTitle->getPrefixedText() ) ;
 595
 596                 $text = str_replace( "$1", $link ,
 597                   wfMsg( "addedwatchtext" ) );
 598                 $wgOut->addHTML( $text );
 599
 600                 $up = new UserUpdate();
 601                 array_push( $wgDeferredUpdateList, $up );
 602
 603                 $wgOut->returnToMain( false );
 604         }
 605
 606         function unwatch()
 607         {
 608                 global $wgUser, $wgTitle, $wgOut, $wgLang;
 609                 global $wgDeferredUpdateList;
 610
 611                 if ( 0 == $wgUser->getID() ) {
 612                         $wgOut->errorpage( "watchnologin", "watchnologintext" );
 613                         return;
 614                 }
 615                 if ( wfReadOnly() ) {
 616                         $wgOut->readOnlyPage();
 617                         return;
 618                 }
 619                 $wgUser->removeWatch( $wgTitle );
 620
 621                 $wgOut->setPagetitle( wfMsg( "removedwatch" ) );
 622                 $wgOut->setRobotpolicy( "noindex,follow" );
 623
 624                 $sk = $wgUser->getSkin() ;
 625                 $link = $sk->makeKnownLink ( $wgTitle->getPrefixedText() ) ;
 626
 627                 $text = str_replace( "$1", $link ,
 628                   wfMsg( "removedwatchtext" ) );
 629                 $wgOut->addHTML( $text );
 630
 631                 $up = new UserUpdate();
 632                 array_push( $wgDeferredUpdateList, $up );
 633
 634                 $wgOut->returnToMain( false );
 635         }
 636
 637         # This shares a lot of issues (and code) with Recent Changes
 638
 639         function history()
 640         {
 641                 global $wgUser, $wgOut, $wgLang, $wgTitle, $offset, $limit;
 642
 643                 # If page hasn't changed, client can cache this
 644
 645                 $wgOut->checkLastModified( $this->getTimestamp() );
 646                 wfProfileIn( "Article::history" );
 647
 648                 $wgOut->setPageTitle( $wgTitle->getPRefixedText() );
 649                 $wgOut->setSubtitle( wfMsg( "revhistory" ) );
 650                 $wgOut->setArticleFlag( false );
 651                 $wgOut->setRobotpolicy( "noindex,nofollow" );
 652
 653                 if( $wgTitle->getArticleID() == 0 ) {
 654                         $wgOut->addHTML( wfMsg( "nohistory" ) );
 655                         wfProfileOut();
 656                         return;
 657                 }
 658
 659                 $offset = (int)$offset;
 660                 $limit = (int)$limit;
 661                 if( $limit == 0 ) $limit = 50;
 662                 $namespace = $wgTitle->getNamespace();
 663                 $title = $wgTitle->getText();
 664                 $sql = "SELECT old_id,old_user," .
 665                   "old_comment,old_user_text,old_timestamp,old_minor_edit ".
 666                   "FROM old USE INDEX (name_title_timestamp) " .
 667                   "WHERE old_namespace={$namespace} AND " .
 668                   "old_title='" . wfStrencode( $wgTitle->getDBkey() ) . "' " .
 669                   "ORDER BY inverse_timestamp LIMIT $offset, $limit";
 670                 $res = wfQuery( $sql, "Article::history" );
 671
 672                 $revs = wfNumRows( $res );
 673                 if( $wgTitle->getArticleID() == 0 ) {
 674                         $wgOut->addHTML( wfMsg( "nohistory" ) );
 675                         wfProfileOut();
 676                         return;
 677                 }
 678
 679                 $sk = $wgUser->getSkin();
 680                 $numbar = wfViewPrevNext(
 681                         $offset, $limit,
 682                         $wgTitle->getPrefixedText(),
 683                         "action=history" );
 684                 $s = $numbar;
 685                 $s .= $sk->beginHistoryList();
 686
 687                 if($offset == 0 )
 688                 $s .= $sk->historyLine( $this->getTimestamp(), $this->getUser(),
 689                   $this->getUserText(), $namespace,
 690                   $title, 0, $this->getComment(),
 691                   ( $this->getMinorEdit() > 0 ) );
 692
 693                 $revs = wfNumRows( $res );
 694                 while ( $line = wfFetchObject( $res ) ) {
 695                         $s .= $sk->historyLine( $line->old_timestamp, $line->old_user,
 696                           $line->old_user_text, $namespace,
 697                           $title, $line->old_id,
 698                           $line->old_comment, ( $line->old_minor_edit > 0 ) );
 699                 }
 700                 $s .= $sk->endHistoryList();
 701                 $s .= $numbar;
 702                 $wgOut->addHTML( $s );
 703                 wfProfileOut();
 704         }
 705
 706         function protect()
 707         {
 708                 global $wgUser, $wgOut, $wgTitle;
 709
 710                 if ( ! $wgUser->isSysop() ) {
 711                         $wgOut->sysopRequired();
 712                         return;
 713                 }
 714                 if ( wfReadOnly() ) {
 715                         $wgOut->readOnlyPage();
 716                         return;
 717                 }
 718                 $id = $wgTitle->getArticleID();
 719                 if ( 0 == $id ) {
 720                         $wgOut->fatalEror( wfMsg( "badarticleerror" ) );
 721                         return;
 722                 }
 723         $sql = "UPDATE cur SET cur_touched='" . wfTimestampNow() . "'," .
 724                   "cur_restrictions='sysop' WHERE cur_id={$id}";
 725                 wfQuery( $sql, "Article::protect" );
 726
 727                 $wgOut->redirect( wfLocalUrl( $wgTitle->getPrefixedURL() ) );
 728         }
 729
 730         function unprotect()
 731         {
 732                 global $wgUser, $wgOut, $wgTitle;
 733
 734                 if ( ! $wgUser->isSysop() ) {
 735                         $wgOut->sysopRequired();
 736                         return;
 737                 }
 738                 if ( wfReadOnly() ) {
 739                         $wgOut->readOnlyPage();
 740                         return;
 741                 }
 742                 $id = $wgTitle->getArticleID();
 743                 if ( 0 == $id ) {
 744                         $wgOut->fatalEror( wfMsg( "badarticleerror" ) );
 745                         return;
 746                 }
 747                 $sql = "UPDATE cur SET cur_touched='" . wfTimestampNow() . "'," .
 748                   "cur_restrictions='' WHERE cur_id={$id}";
 749                 wfQuery( $sql, "Article::unprotect" );
 750
 751                 $wgOut->redirect( wfLocalUrl( $wgTitle->getPrefixedURL() ) );
 752         }
 753
 754         function delete()
 755         {
 756                 global $wgUser, $wgOut, $wgTitle;
 757                 global $wpConfirm, $wpReason, $image, $oldimage;
 758
 759                 # Anybody can delete old revisions of images; only sysops
 760                 # can delete articles and current images
 761
 762                 if ( ( ! $oldimage ) && ( ! $wgUser->isSysop() ) ) {
 763                         $wgOut->sysopRequired();
 764                         return;
 765                 }
 766                 if ( wfReadOnly() ) {
 767                         $wgOut->readOnlyPage();
 768                         return;
 769                 }
 770
 771                 # Better double-check that it hasn't been deleted yet!
 772                 $wgOut->setPagetitle( wfMsg( "confirmdelete" ) );
 773                 if ( $image ) {
 774                         if ( "" == trim( $image ) ) {
 775                                 $wgOut->fatalError( wfMsg( "cannotdelete" ) );
 776                                 return;
 777                         }
 778                         $sub = str_replace( "$1", $image, wfMsg( "deletesub" ) );
 779                 } else {
 780
 781                         if ( ( "" == trim( $wgTitle->getText() ) )
 782                           or ( $wgTitle->getArticleId() == 0 ) ) {
 783                                 $wgOut->fatalError( wfMsg( "cannotdelete" ) );
 784                                 return;
 785                         }
 786                         $sub = str_replace( "$1", $wgTitle->getPrefixedText(),
 787                           wfMsg( "deletesub" ) );
 788
 789                         # determine whether this page has earlier revisions
 790                         # and insert a warning if it does
 791                         # we select the text because it might be useful below
 792                         $sql="SELECT old_text FROM old WHERE old_namespace=0 and old_title='" . wfStrencode($wgTitle->getPrefixedDBkey())."' ORDER BY inverse_timestamp LIMIT 1";
 793                         $res=wfQuery($sql,$fname);
 794                         if( ($old=wfFetchObject($res)) && !$wpConfirm ) {
 795                                 $skin=$wgUser->getSkin();
 796                                 $wgOut->addHTML("<B>".wfMsg("historywarning"));
 797                                 $wgOut->addHTML( $skin->historyLink() ."</B><P>");
 798                         }
 799
 800                         $sql="SELECT cur_text FROM cur WHERE cur_namespace=0 and cur_title='" . wfStrencode($wgTitle->getPrefixedDBkey())."'";
 801                         $res=wfQuery($sql,$fname);
 802                         if( ($s=wfFetchObject($res))) {
 803
 804                                 # if this is a mini-text, we can paste part of it into the deletion reason
 805
 806                                 #if this is empty, an earlier revision may contain "useful" text
 807                                 if($s->cur_text!="") {
 808                                         $text=$s->cur_text;
 809                                 } else {
 810                                         if($old) {
 811                                                 $text=$old->old_text;
 812                                                 $blanked=1;
 813                                         }
 814
 815                                 }
 816
 817                                 $length=strlen($text);
 818
 819                                 # this should not happen, since it is not possible to store an empty, new
 820                                 # page. Let's insert a standard text in case it does, though
 821                                 if($length==0 && !$wpReason) { $wpReason=wfmsg("exblank");}
 822
 823
 824                                 if($length < 500 && !$wpReason) {
 825
 826                                         # comment field=255, let's grep the first 150 to have some user
 827                                         # space left
 828                                         $text=substr($text,0,150);
 829                                         # let's strip out newlines and HTML tags
 830                                         $text=preg_replace("/\"/","'",$text);
 831                                         $text=preg_replace("/\</","&lt;",$text);
 832                                         $text=preg_replace("/\>/","&gt;",$text);
 833                                         $text=preg_replace("/[\n\r]/","",$text);
 834                                         if(!$blanked) {
 835                                                 $wpReason=wfMsg("excontent"). " '".$text;
 836                                         } else {
 837                                                 $wpReason=wfMsg("exbeforeblank") . " '".$text;
 838                                         }
 839                                         if($length>150) { $wpReason .= "..."; } # we've only pasted part of the text
 840                                         $wpReason.="'";
 841                                 }
 842                         }
 843
 844                 }
 845
 846                 # Likewise, deleting old images doesn't require confirmation
 847                 if ( $oldimage || 1 == $wpConfirm ) {
 848                         $this->doDelete();
 849                         return;
 850                 }
 851
 852                 $wgOut->setSubtitle( $sub );
 853                 $wgOut->setRobotpolicy( "noindex,nofollow" );
 854                 $wgOut->addWikiText( wfMsg( "confirmdeletetext" ) );
 855
 856                 $t = $wgTitle->getPrefixedURL();
 857                 $q = "action=delete";
 858
 859                 if ( $image ) {
 860                         $q .= "&image={$image}";
 861                 } else if ( $oldimage ) {
 862                         $q .= "&oldimage={$oldimage}";
 863                 } else {
 864                         $q .= "&title={$t}";
 865                 }
 866                 $formaction = wfEscapeHTML( wfLocalUrl( "", $q ) );
 867                 $confirm = wfMsg( "confirm" );
 868                 $check = wfMsg( "confirmcheck" );
 869                 $delcom = wfMsg( "deletecomment" );
 870
 871                 $wgOut->addHTML( "
 872 <form id=\"deleteconfirm\" method=\"post\" action=\"{$formaction}\">
 873 <table border=0><tr><td align=right>
 874 {$delcom}:</td><td align=left>
 875 <input type=text size=60 name=\"wpReason\" value=\"{$wpReason}\">
 876 </td></tr><tr><td>&nbsp;</td></tr>
 877 <tr><td align=right>
 878 <input type=checkbox name=\"wpConfirm\" value='1'>
 879 </td><td>{$check}</td>
 880 </tr><tr><td>&nbsp;</td><td>
 881 <input type=submit name=\"wpConfirmB\" value=\"{$confirm}\">
 882 </td></tr></table></form>\n" );
 883
 884                 $wgOut->returnToMain( false );
 885         }
 886
 887         function doDelete()
 888         {
 889                 global $wgOut, $wgTitle, $wgUser, $wgLang;
 890                 global $image, $oldimage, $wpReason;
 891                 $fname = "Article::doDelete";
 892
 893                 if ( $image ) {
 894                         $dest = wfImageDir( $image );
 895                         $archive = wfImageDir( $image );
 896                         if ( ! unlink( "{$dest}/{$image}" ) ) {
 897                                 $wgOut->fileDeleteError( "{$dest}/{$image}" );
 898                                 return;
 899                         }
 900                         $sql = "DELETE FROM image WHERE img_name='" .
 901                           wfStrencode( $image ) . "'";
 902                         wfQuery( $sql, $fname );
 903
 904                         $sql = "SELECT oi_archive_name FROM oldimage WHERE oi_name='" .
 905                           wfStrencode( $image ) . "'";
 906                         $res = wfQuery( $sql, $fname );
 907
 908                         while ( $s = wfFetchObject( $res ) ) {
 909                                 $this->doDeleteOldImage( $s->oi_archive_name );
 910                         }
 911                         $sql = "DELETE FROM oldimage WHERE oi_name='" .
 912                           wfStrencode( $image ) . "'";
 913                         wfQuery( $sql, $fname );
 914
 915                         # Image itself is now gone, and database is cleaned.
 916                         # Now we remove the image description page.
 917
 918                         $nt = Title::newFromText( $wgLang->getNsText( Namespace::getImage() ) . ":" . $image );
 919                         $this->doDeleteArticle( $nt );
 920
 921                         $deleted = $image;
 922                 } else if ( $oldimage ) {
 923                         $this->doDeleteOldImage( $oldimage );
 924                         $sql = "DELETE FROM oldimage WHERE oi_archive_name='" .
 925                           wfStrencode( $oldimage ) . "'";
 926                         wfQuery( $sql, $fname );
 927
 928                         $deleted = $oldimage;
 929                 } else {
 930                         $this->doDeleteArticle( $wgTitle );
 931                         $deleted = $wgTitle->getPrefixedText();
 932                 }
 933                 $wgOut->setPagetitle( wfMsg( "actioncomplete" ) );
 934                 $wgOut->setRobotpolicy( "noindex,nofollow" );
 935
 936                 $sk = $wgUser->getSkin();
 937                 $loglink = $sk->makeKnownLink( $wgLang->getNsText(
 938                   Namespace::getWikipedia() ) .
 939                   ":" . wfMsg( "dellogpage" ), wfMsg( "deletionlog" ) );
 940
 941                 $text = str_replace( "$1" , $deleted, wfMsg( "deletedtext" ) );
 942                 $text = str_replace( "$2", $loglink, $text );
 943
 944                 $wgOut->addHTML( "<p>" . $text );
 945                 $wgOut->returnToMain( false );
 946         }
 947
 948         function doDeleteOldImage( $oldimage )
 949         {
 950                 global $wgOut;
 951
 952                 $name = substr( $oldimage, 15 );
 953                 $archive = wfImageArchiveDir( $name );
 954                 if ( ! unlink( "{$archive}/{$oldimage}" ) ) {
 955                         $wgOut->fileDeleteError( "{$archive}/{$oldimage}" );
 956                 }
 957         }
 958
 959         function doDeleteArticle( $title )
 960         {
 961                 global $wgUser, $wgOut, $wgLang, $wpReason, $wgTitle, $wgDeferredUpdateList;
 962
 963                 $fname = "Article::doDeleteArticle";
 964                 $ns = $title->getNamespace();
 965                 $t = wfStrencode( $title->getDBkey() );
 966                 $id = $title->getArticleID();
 967
 968                 if ( "" == $t ) {
 969                         $wgOut->fatalError( wfMsg( "cannotdelete" ) );
 970                         return;
 971                 }
 972
 973                 $u = new SiteStatsUpdate( 0, 1, -$this->isCountable( $this->getContent( true ) ) );
 974                 array_push( $wgDeferredUpdateList, $u );
 975
 976                 # Move article and history to the "archive" table
 977                 $sql = "INSERT INTO archive (ar_namespace,ar_title,ar_text," .
 978                   "ar_comment,ar_user,ar_user_text,ar_timestamp,ar_minor_edit," .
 979                   "ar_flags) SELECT cur_namespace,cur_title,cur_text,cur_comment," .
 980                   "cur_user,cur_user_text,cur_timestamp,cur_minor_edit,0 FROM cur " .
 981                   "WHERE cur_namespace={$ns} AND cur_title='{$t}'";
 982                 wfQuery( $sql, $fname );
 983
 984                 $sql = "INSERT INTO archive (ar_namespace,ar_title,ar_text," .
 985                   "ar_comment,ar_user,ar_user_text,ar_timestamp,ar_minor_edit," .
 986                   "ar_flags) SELECT old_namespace,old_title,old_text,old_comment," .
 987                   "old_user,old_user_text,old_timestamp,old_minor_edit,old_flags " .
 988                   "FROM old WHERE old_namespace={$ns} AND old_title='{$t}'";
 989                 wfQuery( $sql, $fname );
 990
 991                 # Now that it's safely backed up, delete it
 992
 993                 $sql = "DELETE FROM cur WHERE cur_namespace={$ns} AND " .
 994                   "cur_title='{$t}'";
 995                 wfQuery( $sql, $fname );
 996
 997                 $sql = "DELETE FROM old WHERE old_namespace={$ns} AND " .
 998                   "old_title='{$t}'";
 999                 wfQuery( $sql, $fname );
1000
1001                 $sql = "DELETE FROM recentchanges WHERE rc_namespace={$ns} AND " .
1002                   "rc_title='{$t}'";
1003         wfQuery( $sql, $fname );
1004
1005                 # Finally, clean up the link tables
1006
1007                 if ( 0 != $id ) {
1008                         $t = wfStrencode( $title->getPrefixedDBkey() );
1009                         $sql = "SELECT l_from FROM links WHERE l_to={$id}";
1010                         $res = wfQuery( $sql, $fname );
1011
1012                         $sql = "INSERT INTO brokenlinks (bl_from,bl_to) VALUES ";
1013             $now = wfTimestampNow();
1014                         $sql2 = "UPDATE cur SET cur_touched='{$now}' WHERE cur_id IN (";
1015                         $first = true;
1016
1017                         while ( $s = wfFetchObject( $res ) ) {
1018                                 $nt = Title::newFromDBkey( $s->l_from );
1019                                 $lid = $nt->getArticleID();
1020
1021                                 if ( ! $first ) { $sql .= ","; $sql2 .= ","; }
1022                                 $first = false;
1023                                 $sql .= "({$lid},'{$t}')";
1024                                 $sql2 .= "{$lid}";
1025                         }
1026                         $sql2 .= ")";
1027                         if ( ! $first ) {
1028                                 wfQuery( $sql, $fname );
1029                                 wfQuery( $sql2, $fname );
1030                         }
1031                         wfFreeResult( $res );
1032
1033                         $sql = "DELETE FROM links WHERE l_to={$id}";
1034                         wfQuery( $sql, $fname );
1035
1036                         $sql = "DELETE FROM links WHERE l_from='{$t}'";
1037                         wfQuery( $sql, $fname );
1038
1039                         $sql = "DELETE FROM imagelinks WHERE il_from='{$t}'";
1040                         wfQuery( $sql, $fname );
1041
1042                         $sql = "DELETE FROM brokenlinks WHERE bl_from={$id}";
1043                         wfQuery( $sql, $fname );
1044                 }
1045
1046                 $log = new LogPage( wfMsg( "dellogpage" ), wfMsg( "dellogpagetext" ) );
1047                 $art = $title->getPrefixedText();
1048                 $wpReason = wfCleanQueryVar( $wpReason );
1049                 $log->addEntry( str_replace( "$1", $art, wfMsg( "deletedarticle" ) ), $wpReason );
1050
1051                 # Clear the cached article id so the interface doesn't act like we exist
1052                 $wgTitle->resetArticleID( 0 );
1053                 $wgTitle->mArticleID = 0;
1054         }
1055
1056         function revert()
1057         {
1058                 global $wgOut;
1059                 global $oldimage;
1060
1061                 if ( strlen( $oldimage ) < 16 ) {
1062                         $wgOut->unexpectedValueError( "oldimage", $oldimage );
1063                         return;
1064                 }
1065                 if ( wfReadOnly() ) {
1066                         $wgOut->readOnlyPage();
1067                         return;
1068                 }
1069                 $name = substr( $oldimage, 15 );
1070
1071                 $dest = wfImageDir( $name );
1072                 $archive = wfImageArchiveDir( $name );
1073                 $curfile = "{$dest}/{$name}";
1074
1075                 if ( ! is_file( $curfile ) ) {
1076                         $wgOut->fileNotFoundError( $curfile );
1077                         return;
1078                 }
1079                 $oldver = wfTimestampNow() . "!{$name}";
1080                 $size = wfGetSQL( "oldimage", "oi_size", "oi_archive_name='" .
1081                   wfStrencode( $oldimage ) . "'" );
1082
1083                 if ( ! rename( $curfile, "${archive}/{$oldver}" ) ) {
1084                         $wgOut->fileRenameError( $curfile, "${archive}/{$oldver}" );
1085                         return;
1086                 }
1087                 if ( ! copy( "{$archive}/{$oldimage}", $curfile ) ) {
1088                         $wgOut->fileCopyError( "${archive}/{$oldimage}", $curfile );
1089                 }
1090                 wfRecordUpload( $name, $oldver, $size, wfMsg( "reverted" ) );
1091
1092                 $wgOut->setPagetitle( wfMsg( "actioncomplete" ) );
1093                 $wgOut->setRobotpolicy( "noindex,nofollow" );
1094                 $wgOut->addHTML( wfMsg( "imagereverted" ) );
1095                 $wgOut->returnToMain( false );
1096         }
1097
1098         function rollback()
1099         {
1100                 global $wgUser, $wgTitle, $wgLang, $wgOut, $from;
1101
1102                 if ( ! $wgUser->isSysop() ) {
1103                         $wgOut->sysopRequired();
1104                         return;
1105                 }
1106
1107                 # Replace all this user's current edits with the next one down
1108                 $tt = wfStrencode( $wgTitle->getDBKey() );
1109                 $n = $wgTitle->getNamespace();
1110
1111                 # Get the last editor
1112                 $sql = "SELECT cur_id,cur_user,cur_user_text,cur_comment FROM cur WHERE cur_title='{$tt}' AND cur_namespace={$n}";
1113                 $res = wfQuery( $sql );
1114                 if( ($x = wfNumRows( $res )) != 1 ) {
1115                         # Something wrong
1116                         $wgOut->addHTML( wfMsg( "notanarticle" ) );
1117                         return;
1118                 }
1119                 $s = wfFetchObject( $res );
1120                 $ut = wfStrencode( $s->cur_user_text );
1121                 $uid = $s->cur_user;
1122                 $pid = $s->cur_id;
1123
1124                 $from = str_replace( '_', ' ', wfCleanQueryVar( $from ) );
1125                 if( $from != $s->cur_user_text ) {
1126                         $wgOut->setPageTitle(wfmsg("rollbackfailed"));
1127                         $wgOut->addWikiText( wfMsg( "alreadyrolled",
1128                                 htmlspecialchars( $wgTitle->getPrefixedText()),
1129                                 htmlspecialchars( $from ),
1130                                 htmlspecialchars( $s->cur_user_text ) ) );
1131                         if($s->cur_comment != "") {
1132                                 $wgOut->addHTML(
1133                                         wfMsg("editcomment",
1134                                         htmlspecialchars( $s->cur_comment ) ) );
1135                                 }
1136                         return;
1137                 }
1138
1139                 # Get the last edit not by this guy
1140                 $sql = "SELECT old_text,old_user,old_user_text
1141                 FROM old USE INDEX (name_title_timestamp)
1142                 WHERE old_namespace={$n} AND old_title='{$tt}'
1143                 AND (old_user <> {$uid} OR old_user_text <> '{$ut}')
1144                 ORDER BY inverse_timestamp LIMIT 1";
1145                 $res = wfQuery( $sql );
1146                 if( wfNumRows( $res ) != 1 ) {
1147                         # Something wrong
1148                         $wgOut->setPageTitle(wfMsg("rollbackfailed"));
1149                         $wgOut->addHTML( wfMsg( "cantrollback" ) );
1150                         return;
1151                 }
1152                 $s = wfFetchObject( $res );
1153
1154                 # Save it!
1155                 $newcomment = str_replace( "$1", $s->old_user_text, wfMsg( "revertpage" ) );
1156                 $wgOut->setPagetitle( wfMsg( "actioncomplete" ) );
1157                 $wgOut->setRobotpolicy( "noindex,nofollow" );
1158                 $wgOut->addHTML( "<h2>" . $newcomment . "</h2>\n<hr>\n" );
1159                 $this->updateArticle( $s->old_text, $newcomment, 1, $wgTitle->userIsWatching() );
1160
1161                 $wgOut->returnToMain( false );
1162         }
1163
1164
1165         # Do standard deferred updates after page view
1166
1167         /* private */ function viewUpdates()
1168         {
1169                 global $wgDeferredUpdateList, $wgTitle;
1170
1171                 if ( 0 != $this->getID() ) {
1172                         $u = new ViewCountUpdate( $this->getID() );
1173                         array_push( $wgDeferredUpdateList, $u );
1174                         $u = new SiteStatsUpdate( 1, 0, 0 );
1175                         array_push( $wgDeferredUpdateList, $u );
1176
1177                         $u = new UserTalkUpdate( 0, $wgTitle->getNamespace(),
1178                           $wgTitle->getDBkey() );
1179                         array_push( $wgDeferredUpdateList, $u );
1180                 }
1181         }
1182
1183         # Do standard deferred updates after page edit.
1184         # Every 1000th edit, prune the recent changes table.
1185
1186         /* private */ function editUpdates( $text )
1187         {
1188                 global $wgDeferredUpdateList, $wgTitle;
1189
1190                 wfSeedRandom();
1191                 if ( 0 == mt_rand( 0, 999 ) ) {
1192                         $cutoff = wfUnix2Timestamp( time() - ( 7 * 86400 ) );
1193                         $sql = "DELETE FROM recentchanges WHERE rc_timestamp < '{$cutoff}'";
1194                         wfQuery( $sql );
1195                 }
1196                 $id = $this->getID();
1197                 $title = $wgTitle->getPrefixedDBkey();
1198                 $adj = $this->mCountAdjustment;
1199
1200                 if ( 0 != $id ) {
1201                         $u = new LinksUpdate( $id, $title );
1202                         array_push( $wgDeferredUpdateList, $u );
1203                         $u = new SiteStatsUpdate( 0, 1, $adj );
1204                         array_push( $wgDeferredUpdateList, $u );
1205                         $u = new SearchUpdate( $id, $title, $text );
1206                         array_push( $wgDeferredUpdateList, $u );
1207
1208                         $u = new UserTalkUpdate( 1, $wgTitle->getNamespace(),
1209                           $wgTitle->getDBkey() );
1210                         array_push( $wgDeferredUpdateList, $u );
1211                 }
1212         }
1213
1214         /* private */ function setOldSubtitle()
1215         {
1216                 global $wgLang, $wgOut;
1217
1218                 $td = $wgLang->timeanddate( $this->mTimestamp, true );
1219                 $r = str_replace( "$1", "{$td}", wfMsg( "revisionasof" ) );
1220                 $wgOut->setSubtitle( "({$r})" );
1221         }
1222
1223         # This function is called right before saving the wikitext,
1224         # so we can do things like signatures and links-in-context.
1225
1226         function preSaveTransform( $text )
1227         {
1228                 $s = "";
1229                 while ( "" != $text ) {
1230                         $p = preg_split( "/<\\s*nowiki\\s*>/i", $text, 2 );
1231                         $s .= $this->pstPass2( $p[0] );
1232
1233                         if ( ( count( $p ) < 2 ) || ( "" == $p[1] ) ) { $text = ""; }
1234                         else {
1235                                 $q = preg_split( "/<\\/\\s*nowiki\\s*>/i", $p[1], 2 );
1236                                 $s .= "<nowiki>{$q[0]}</nowiki>";
1237                                 $text = $q[1];
1238                         }
1239                 }
1240                 return rtrim( $s );
1241         }
1242
1243         /* private */ function pstPass2( $text )
1244         {
1245                 global $wgUser, $wgLang, $wgTitle, $wgLocaltimezone;
1246
1247                 # Signatures
1248                 #
1249                 $n = $wgUser->getName();
1250                 $k = $wgUser->getOption( "nickname" );
1251                 if ( "" == $k ) { $k = $n; }
1252                 if(isset($wgLocaltimezone)) {
1253                         $oldtz = getenv("TZ"); putenv("TZ=$wgLocaltimezone");
1254                 }
1255                 /* Note: this is an ugly timezone hack for the European wikis */
1256                 $d = $wgLang->timeanddate( date( "YmdHis" ), false ) .
1257                   " (" . date( "T" ) . ")";
1258                 if(isset($wgLocaltimezone)) putenv("TZ=$oldtz");
1259
1260                 $text = preg_replace( "/~~~~/", "[[" . $wgLang->getNsText(
1261                   Namespace::getUser() ) . ":$n|$k]] $d", $text );
1262                 $text = preg_replace( "/~~~/", "[[" . $wgLang->getNsText(
1263                   Namespace::getUser() ) . ":$n|$k]]", $text );
1264
1265                 # Context links: [[|name]] and [[name (context)|]]
1266                 #
1267                 $tc = "[&;%\\-,.\\(\\)' _0-9A-Za-z\\/:\\x80-\\xff]";
1268                 $np = "[&;%\\-,.' _0-9A-Za-z\\/:\\x80-\\xff]"; # No parens
1269                 $conpat = "/^({$np}+) \\(({$tc}+)\\)$/";
1270
1271                 $p1 = "/\[\[({$np}+) \\(({$np}+)\\)\\|]]/";             # [[page (context)|]]
1272                 $p2 = "/\[\[\\|({$tc}+)]]/";                                    # [[|page]]
1273                 $p3 = "/\[\[([A-Za-z _]+):({$np}+)\\|]]/";              # [[namespace:page|]]
1274                 $p4 = "/\[\[([A-Aa-z _]+):({$np}+) \\(({$np}+)\\)\\|]]/";
1275                                                                                                                 # [[ns:page (cont)|]]
1276                 $context = "";
1277                 $t = $wgTitle->getText();
1278                 if ( preg_match( $conpat, $t, $m ) ) {
1279                         $context = $m[2];
1280                 }
1281                 $text = preg_replace( $p4, "[[\\1:\\2 (\\3)|\\2]]", $text );
1282                 $text = preg_replace( $p1, "[[\\1 (\\2)|\\1]]", $text );
1283                 $text = preg_replace( $p3, "[[\\1:\\2|\\2]]", $text );
1284
1285                 if ( "" == $context ) {
1286                         $text = preg_replace( $p2, "[[\\1]]", $text );
1287                 } else {
1288                         $text = preg_replace( $p2, "[[\\1 ({$context})|\\1]]", $text );
1289                 }
1290                 # Replace local image links with new [[image:]] style
1291
1292                 $text = preg_replace(
1293                   "/(^|[^[])http:\/\/(www.|)wikipedia.com\/upload\/" .
1294                   "([a-zA-Z0-9_:.~\%\-]+)\.(png|PNG|jpg|JPG|jpeg|JPEG|gif|GIF)/",
1295                   "\\1[[image:\\3.\\4]]", $text );
1296                 $text = preg_replace(
1297                   "/(^|[^[])http:\/\/(www.|)wikipedia.com\/images\/uploads\/" .
1298                   "([a-zA-Z0-9_:.~\%\-]+)\.(png|PNG|jpg|JPG|jpeg|JPEG|gif|GIF)/",
1299                   "\\1[[image:\\3.\\4]]", $text );
1300
1301                 return $text;
1302         }
1303
1304         /* Caching functions */
1305
1306         function tryFileCache() {
1307                 global $wgTitle;
1308
1309                 if($this->isFileCacheable()) {
1310                         $cache = new CacheManager( $wgTitle );
1311                         if($cache->isFileCacheGood( $this->mTouched )) {
1312                                 wfDebug( " tryFileCache() - about to load\n" );
1313                                 $cache->loadFromFileCache();
1314                                 exit;
1315                         } else {
1316                                 wfDebug( " tryFileCache() - starting buffer\n" );
1317                                 if($cache->useGzip()) {
1318                                         /* For some reason, adding this header line over in
1319                                            CacheManager::saveToFileCache() fails on my test
1320                                            setup at home, though it works on the live install.
1321                                            Make double-sure...  --brion */
1322                                         header( "Content-Encoding: gzip" );
1323                                 }
1324                                 ob_start( array(&$cache, 'saveToFileCache' ) );
1325                         }
1326                 } else {
1327                         wfDebug( " tryFileCache() - not cacheable\n" );
1328                 }
1329         }
1330
1331         function isFileCacheable() {
1332                 global $wgUser, $wgTitle, $wgUseFileCache, $wgShowIPinHeader;
1333                 global $action, $oldid, $diff, $redirect, $printable;
1334                 return $wgUseFileCache
1335                         and (!$wgShowIPinHeader)
1336                         and ($wgUser->getId() == 0)
1337                         and (!$wgUser->getNewtalk())
1338                         and ($wgTitle->getNamespace != Namespace::getSpecial())
1339                         and ($action == "view")
1340                         and (!isset($oldid))
1341                         and (!isset($diff))
1342                         and (!isset($redirect))
1343                         and (!isset($printable))
1344                         and (!$this->mRedirectedFrom);
1345
1346         }
1347
1348
1349 }
1350
1351 ?>