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