includes/ChangesList.php

   1 <?php
   2
   3 /**
   4  * @todo document
   5  */
   6 class RCCacheEntry extends RecentChange
   7 {
   8         var $secureName, $link;
   9         var $curlink , $difflink, $lastlink , $usertalklink , $versionlink ;
  10         var $userlink, $timestamp, $watched;
  11
  12         static function newFromParent( $rc ) {
  13                 $rc2 = new RCCacheEntry;
  14                 $rc2->mAttribs = $rc->mAttribs;
  15                 $rc2->mExtra = $rc->mExtra;
  16                 return $rc2;
  17         }
  18 } ;
  19
  20 /**
  21  * Class to show various lists of changes:
  22  * - what links here
  23  * - related changes
  24  * - recent changes
  25  */
  26 class ChangesList {
  27         # Called by history lists and recent changes
  28         #
  29
  30         /**
  31         * Changeslist contructor
  32         * @param Skin $skin
  33         */
  34         function __construct( &$skin ) {
  35                 $this->skin =& $skin;
  36                 $this->preCacheMessages();
  37         }
  38
  39         /**
  40          * Fetch an appropriate changes list class for the specified user
  41          * Some users might want to use an enhanced list format, for instance
  42          *
  43          * @param $user User to fetch the list class for
  44          * @return ChangesList derivative
  45          */
  46         public static function newFromUser( &$user ) {
  47                 $sk = $user->getSkin();
  48                 $list = NULL;
  49                 if( wfRunHooks( 'FetchChangesList', array( &$user, &$sk, &$list ) ) ) {
  50                         return $user->getOption( 'usenewrc' ) ? new EnhancedChangesList( $sk ) : new OldChangesList( $sk );
  51                 } else {
  52                         return $list;
  53                 }
  54         }
  55
  56         /**
  57          * As we use the same small set of messages in various methods and that
  58          * they are called often, we call them once and save them in $this->message
  59          */
  60         private function preCacheMessages() {
  61                 // Precache various messages
  62                 if( !isset( $this->message ) ) {
  63                         foreach( explode(' ', 'cur diff hist minoreditletter newpageletter last '.
  64                                 'blocklink history boteditletter semicolon-separator' ) as $msg ) {
  65                                 $this->message[$msg] = wfMsgExt( $msg, array( 'escapenoentities' ) );
  66                         }
  67                 }
  68         }
  69
  70
  71         /**
  72          * Returns the appropriate flags for new page, minor change and patrolling
  73          * @param bool $new
  74          * @param bool $minor
  75          * @param bool $patrolled
  76          * @param string $nothing, string to use for empty space
  77          * @param bool $bot
  78          * @param bool $newbie
  79          * @return string
  80          */
  81         protected function recentChangesFlags( $new, $minor, $patrolled, $nothing = '&nbsp;', $bot = false, $newbie = false ) {
  82                 $f = $new ? '<span class="newpage">' . $this->message['newpageletter'] . '</span>'
  83                                 : $nothing;
  84                 $f .= $minor ? '<span class="minor">' . $this->message['minoreditletter'] . '</span>'
  85                                 : $nothing;
  86                 $f .= $bot ? '<span class="bot">' . $this->message['boteditletter'] . '</span>' : $nothing;
  87                 $f .= $patrolled ? '<span class="unpatrolled">!</span>' : $nothing;
  88                 $f .= $newbie ? '<span class="newuser">*</span>' : $nothing;
  89                 return $f;
  90         }
  91
  92         protected static function userIsNew( $attribs ) {
  93                 global $wgAutoConfirmCount, $wgAutoConfirmAge;
  94                 if( !array_key_exists('user_editcount',$attribs) || !array_key_exists('user_registration',$attribs) ) {
  95                         return false; // missing input!
  96                 }
  97                 static $time;
  98                 $time = time();
  99                 $edits = $attribs['user_editcount'];
 100                 $age = $attribs['user_registration'];
 101                 if( $wgAutoConfirmCount && !$edits || $wgAutoConfirmAge && !$age ) {
 102                         return true;
 103                 } else if( $wgAutoConfirmCount && $edits < $wgAutoConfirmCount ) {
 104                         return true;
 105                 } else if( $wgAutoConfirmAge && ($time - wfTimestampOrNull(TS_UNIX,$age)) < $wgAutoConfirmAge ) {
 106                         return true;
 107                 }
 108                 return false;
 109         }
 110
 111         /**
 112          * Returns text for the start of the tabular part of RC
 113          * @return string
 114          */
 115         public function beginRecentChangesList() {
 116                 $this->rc_cache = array();
 117                 $this->rcMoveIndex = 0;
 118                 $this->rcCacheIndex = 0;
 119                 $this->lastdate = '';
 120                 $this->rclistOpen = false;
 121                 return '';
 122         }
 123
 124         /**
 125          * Returns text for the end of RC
 126          * @return string
 127          */
 128         public function endRecentChangesList() {
 129                 if( $this->rclistOpen ) {
 130                         return "</ul>\n";
 131                 } else {
 132                         return '';
 133                 }
 134         }
 135
 136         protected function insertMove( &$s, $rc ) {
 137                 # Diff
 138                 $s .= '(' . $this->message['diff'] . ') (';
 139                 # Hist
 140                 $s .= $this->skin->makeKnownLinkObj( $rc->getMovedToTitle(), $this->message['hist'], 'action=history' ) .
 141                         ') . . ';
 142
 143                 # "[[x]] moved to [[y]]"
 144                 $msg = ( $rc->mAttribs['rc_type'] == RC_MOVE ) ? '1movedto2' : '1movedto2_redir';
 145                 $s .= wfMsg( $msg, $this->skin->makeKnownLinkObj( $rc->getTitle(), '', 'redirect=no' ),
 146                         $this->skin->makeKnownLinkObj( $rc->getMovedToTitle(), '' ) );
 147         }
 148
 149         protected function insertDateHeader(&$s, $rc_timestamp) {
 150                 global $wgLang;
 151
 152                 # Make date header if necessary
 153                 $date = $wgLang->date( $rc_timestamp, true, true );
 154                 if( $date != $this->lastdate ) {
 155                         if( '' != $this->lastdate ) {
 156                                 $s .= "</ul>\n";
 157                         }
 158                         $s .= '<h4>'.$date."</h4>\n<ul class=\"special\">";
 159                         $this->lastdate = $date;
 160                         $this->rclistOpen = true;
 161                 }
 162         }
 163
 164         protected function insertLog(&$s, $title, $logtype) {
 165                 $logname = LogPage::logName( $logtype );
 166                 $s .= '(' . $this->skin->makeKnownLinkObj($title, $logname ) . ')';
 167         }
 168
 169         protected function insertDiffHist(&$s, &$rc, $unpatrolled) {
 170                 # Diff link
 171                 if( !$this->userCan($rc,Revision::DELETED_TEXT) ) {
 172                         $diffLink = $this->message['diff'];
 173                 } else if( $rc->mAttribs['rc_type'] == RC_NEW || $rc->mAttribs['rc_type'] == RC_LOG ) {
 174                         $diffLink = $this->message['diff'];
 175                 } else {
 176                         $rcidparam = $unpatrolled
 177                                 ? array( 'rcid' => $rc->mAttribs['rc_id'] )
 178                                 : array();
 179                         $diffLink = $this->skin->makeKnownLinkObj( $rc->getTitle(), $this->message['diff'],
 180                                 wfArrayToCGI( array(
 181                                         'curid' => $rc->mAttribs['rc_cur_id'],
 182                                         'diff'  => $rc->mAttribs['rc_this_oldid'],
 183                                         'oldid' => $rc->mAttribs['rc_last_oldid'] ),
 184                                         $rcidparam ),
 185                                 '', '', ' tabindex="'.$rc->counter.'"');
 186                 }
 187                 $s .= '('.$diffLink.') (';
 188
 189                 # History link
 190                 $s .= $this->skin->makeKnownLinkObj( $rc->getTitle(), $this->message['hist'],
 191                         wfArrayToCGI( array(
 192                                 'curid' => $rc->mAttribs['rc_cur_id'],
 193                                 'action' => 'history' ) ) );
 194                 $s .= ') . . ';
 195         }
 196
 197         protected function insertArticleLink(&$s, &$rc, $unpatrolled, $watched) {
 198                 # Article link
 199                 # If it's a new article, there is no diff link, but if it hasn't been
 200                 # patrolled yet, we need to give users a way to do so
 201                 $params = ( $unpatrolled && $rc->mAttribs['rc_type'] == RC_NEW )
 202                         ? 'rcid='.$rc->mAttribs['rc_id']
 203                         : '';
 204                 if( $this->isDeleted($rc,Revision::DELETED_TEXT) ) {
 205                         $articlelink = $this->skin->makeKnownLinkObj( $rc->getTitle(), '', $params );
 206                         $articlelink = '<span class="history-deleted">'.$articlelink.'</span>';
 207                 } else {
 208                     $articlelink = ' '. $this->skin->makeKnownLinkObj( $rc->getTitle(), '', $params );
 209                 }
 210                 if( $watched )
 211                         $articlelink = "<strong class=\"mw-watched\">{$articlelink}</strong>";
 212                 global $wgContLang;
 213                 $articlelink .= $wgContLang->getDirMark();
 214
 215                 wfRunHooks('ChangesListInsertArticleLink',
 216                         array(&$this, &$articlelink, &$s, &$rc, $unpatrolled, $watched));
 217
 218                 $s .= ' '.$articlelink;
 219         }
 220
 221         protected function insertTimestamp(&$s, $rc) {
 222                 global $wgLang;
 223                 # Timestamp
 224                 $s .= $this->message['semicolon-separator'] . $wgLang->time( $rc->mAttribs['rc_timestamp'], true, true ) . ' . . ';
 225         }
 226
 227         /** Insert links to user page, user talk page and eventually a blocking link */
 228         public function insertUserRelatedLinks(&$s, &$rc) {
 229                 if ( $this->isDeleted($rc,Revision::DELETED_USER) ) {
 230                    $s .= ' <span class="history-deleted">' . wfMsgHtml('rev-deleted-user') . '</span>';
 231                 } else {
 232                   $s .= $this->skin->userLink( $rc->mAttribs['rc_user'], $rc->mAttribs['rc_user_text'] );
 233                   $s .= $this->skin->userToolLinks( $rc->mAttribs['rc_user'], $rc->mAttribs['rc_user_text'] );
 234                 }
 235         }
 236
 237         /** insert a formatted action */
 238         protected function insertAction(&$s, &$rc) {
 239                 # Add action
 240                 if( $rc->mAttribs['rc_type'] == RC_LOG ) {
 241                         // log action
 242                         if ( $this->isDeleted($rc,LogPage::DELETED_ACTION) ) {
 243                                 $s .= ' <span class="history-deleted">' . wfMsgHtml('rev-deleted-event') . '</span>';
 244                         } else {
 245                                 $s .= ' ' . LogPage::actionText( $rc->mAttribs['rc_log_type'], $rc->mAttribs['rc_log_action'],
 246                                         $rc->getTitle(), $this->skin, LogPage::extractParams($rc->mAttribs['rc_params']), true, true );
 247                         }
 248                 }
 249         }
 250
 251         /** insert a formatted comment */
 252         protected function insertComment(&$s, &$rc) {
 253                 # Add comment
 254                 if( $rc->mAttribs['rc_type'] != RC_MOVE && $rc->mAttribs['rc_type'] != RC_MOVE_OVER_REDIRECT ) {
 255                         // log comment
 256                         if ( $this->isDeleted($rc,Revision::DELETED_COMMENT) ) {
 257                                 $s .= ' <span class="history-deleted">' . wfMsgHtml('rev-deleted-comment') . '</span>';
 258                         } else {
 259                                 $s .= $this->skin->commentBlock( $rc->mAttribs['rc_comment'], $rc->getTitle() );
 260                         }
 261                 }
 262         }
 263
 264         /**
 265          * Check whether to enable recent changes patrol features
 266          * @return bool
 267          */
 268         public static function usePatrol() {
 269                 global $wgUser;
 270                 return $wgUser->useRCPatrol();
 271         }
 272
 273         /**
 274          * Returns the string which indicates the number of watching users
 275          */
 276         protected function numberofWatchingusers( $count ) {
 277                 global $wgLang;
 278                 static $cache = array();
 279                 if ( $count > 0 ) {
 280                         if ( !isset( $cache[$count] ) ) {
 281                                 $cache[$count] = wfMsgExt('number_of_watching_users_RCview',
 282                                         array('parsemag', 'escape'), $wgLang->formatNum($count));
 283                         }
 284                         return $cache[$count];
 285                 } else {
 286                         return '';
 287                 }
 288         }
 289
 290         /**
 291          * Determine if said field of a revision is hidden
 292          * @param RCCacheEntry $rc
 293          * @param int $field one of DELETED_* bitfield constants
 294          * @return bool
 295          */
 296         public static function isDeleted( $rc, $field ) {
 297                 return ($rc->mAttribs['rc_deleted'] & $field) == $field;
 298         }
 299
 300         /**
 301          * Determine if the current user is allowed to view a particular
 302          * field of this revision, if it's marked as deleted.
 303          * @param RCCacheEntry $rc
 304          * @param int $field
 305          * @return bool
 306          */
 307         public static function userCan( $rc, $field ) {
 308                 if( ( $rc->mAttribs['rc_deleted'] & $field ) == $field ) {
 309                         global $wgUser;
 310                         $permission = ( $rc->mAttribs['rc_deleted'] & Revision::DELETED_RESTRICTED ) == Revision::DELETED_RESTRICTED
 311                                 ? 'suppressrevision'
 312                                 : 'deleterevision';
 313                         wfDebug( "Checking for $permission due to $field match on $rc->mAttribs['rc_deleted']\n" );
 314                         return $wgUser->isAllowed( $permission );
 315                 } else {
 316                         return true;
 317                 }
 318         }
 319 }
 320
 321
 322 /**
 323  * Generate a list of changes using the good old system (no javascript)
 324  */
 325 class OldChangesList extends ChangesList {
 326         /**
 327          * Format a line using the old system (aka without any javascript).
 328          */
 329         public function recentChangesLine( &$rc, $watched = false ) {
 330                 global $wgContLang, $wgRCShowChangedSize, $wgUser;
 331
 332                 $fname = 'ChangesList::recentChangesLineOld';
 333                 wfProfileIn( $fname );
 334
 335                 # Extract DB fields into local scope
 336                 // FIXME: Would be good to replace this extract() call with something that explicitly initializes local variables.
 337                 extract( $rc->mAttribs );
 338
 339                 # Should patrol-related stuff be shown?
 340                 $unpatrolled = $wgUser->useRCPatrol() && $rc_patrolled == 0;
 341
 342                 $dateheader = ""; // $s now contains only <li>...</li>, for hooks' convenience.
 343                 $this->insertDateHeader($dateheader,$rc_timestamp);
 344
 345                 $s = '';
 346
 347                 // Moved pages
 348                 if( $rc_type == RC_MOVE || $rc_type == RC_MOVE_OVER_REDIRECT ) {
 349                         $this->insertMove( $s, $rc );
 350                 // Log entries
 351                 } elseif( $rc_log_type ) {
 352                         $logtitle = Title::newFromText( "Log/$rc_log_type", NS_SPECIAL );
 353                         $this->insertLog( $s, $logtitle, $rc_log_type );
 354                 // Log entries (old format) or log targets, and special pages
 355                 } elseif( $rc_namespace == NS_SPECIAL ) {
 356                         list( $specialName, $specialSubpage ) = SpecialPage::resolveAliasWithSubpage( $rc_title );
 357                         if ( $specialName == 'Log' ) {
 358                                 $this->insertLog( $s, $rc->getTitle(), $specialSubpage );
 359                         } else {
 360                                 wfDebug( "Unexpected special page in recentchanges\n" );
 361                         }
 362                 // Regular entries
 363                 } else {
 364                         wfProfileIn($fname.'-page');
 365
 366                         $this->insertDiffHist($s, $rc, $unpatrolled);
 367                         # M, N, b and ! (minor, new, bot and unpatrolled)
 368                         $newbie = self::userIsNew( $rc->mAttribs );
 369                         $s .= $this->recentChangesFlags( $rc_type == RC_NEW, $rc_minor, $unpatrolled, '',
 370                                 $rc_bot, $newbie );
 371                         $this->insertArticleLink($s, $rc, $unpatrolled, $watched);
 372
 373                         wfProfileOut($fname.'-page');
 374                 }
 375
 376                 wfProfileIn( $fname.'-rest' );
 377
 378                 $this->insertTimestamp($s,$rc);
 379
 380                 if( $wgRCShowChangedSize ) {
 381                         $s .= ( $rc->getCharacterDifference() == '' ? '' : $rc->getCharacterDifference() . ' . . ' );
 382                 }
 383                 # User tool links
 384                 $this->insertUserRelatedLinks($s,$rc);
 385                 # Log action text (if any)
 386                 $this->insertAction($s, $rc);
 387                 # Edit or log comment
 388                 $this->insertComment($s, $rc);
 389
 390                 # Mark revision as deleted if so
 391                 if ( !$rc_log_type && $this->isDeleted($rc,Revision::DELETED_TEXT) )
 392                    $s .= ' <tt>' . wfMsgHtml( 'deletedrev' ) . '</tt>';
 393                 if($rc->numberofWatchingusers > 0) {
 394                         $s .= ' ' . wfMsg('number_of_watching_users_RCview',  $wgContLang->formatNum($rc->numberofWatchingusers));
 395                 }
 396
 397                 wfRunHooks( 'OldChangesListRecentChangesLine', array(&$this, &$s, $rc) );
 398
 399                 $s .= "<li>$s</li>\n";
 400
 401                 wfProfileOut( $fname.'-rest' );
 402
 403                 wfProfileOut( $fname );
 404                 return $dateheader . $s;
 405         }
 406 }
 407
 408
 409 /**
 410  * Generate a list of changes using an Enhanced system (use javascript).
 411  */
 412 class EnhancedChangesList extends ChangesList {
 413         /**
 414          * Format a line for enhanced recentchange (aka with javascript and block of lines).
 415          */
 416         public function recentChangesLine( &$baseRC, $watched = false ) {
 417                 global $wgLang, $wgContLang, $wgUser;
 418
 419                 # Create a specialised object
 420                 $rc = RCCacheEntry::newFromParent( $baseRC );
 421
 422                 # Extract fields from DB into the function scope (rc_xxxx variables)
 423                 // FIXME: Would be good to replace this extract() call with something that explicitly initializes local variables.
 424                 extract( $rc->mAttribs );
 425                 $curIdEq = 'curid=' . $rc_cur_id;
 426
 427                 # If it's a new day, add the headline and flush the cache
 428                 $date = $wgLang->date( $rc_timestamp, true);
 429                 $ret = '';
 430                 if( $date != $this->lastdate ) {
 431                         # Process current cache
 432                         $ret = $this->recentChangesBlock();
 433                         $this->rc_cache = array();
 434                         $ret .= "<h4>{$date}</h4>\n";
 435                         $this->lastdate = $date;
 436                 }
 437
 438                 # Should patrol-related stuff be shown?
 439                 if( $wgUser->useRCPatrol() ) {
 440                         $rc->unpatrolled = !$rc_patrolled;
 441                 } else {
 442                         $rc->unpatrolled = false;
 443                 }
 444
 445                 $showdifflinks = true;
 446                 # Make article link
 447                 // Page moves
 448                 if( $rc_type == RC_MOVE || $rc_type == RC_MOVE_OVER_REDIRECT ) {
 449                         $msg = ( $rc_type == RC_MOVE ) ? "1movedto2" : "1movedto2_redir";
 450                         $clink = wfMsg( $msg, $this->skin->makeKnownLinkObj( $rc->getTitle(), '', 'redirect=no' ),
 451                           $this->skin->makeKnownLinkObj( $rc->getMovedToTitle(), '' ) );
 452                 // Log entries (old format) and special pages
 453                 } elseif( $rc_namespace == NS_SPECIAL ) {
 454                         list( $specialName, $logtype ) = SpecialPage::resolveAliasWithSubpage( $rc_title );
 455                         if ( $specialName == 'Log' ) {
 456                                 # Log updates, etc
 457                                 $logname = LogPage::logName( $logtype );
 458                                 $clink = '(' . $this->skin->makeKnownLinkObj( $rc->getTitle(), $logname ) . ')';
 459                         } else {
 460                                 wfDebug( "Unexpected special page in recentchanges\n" );
 461                                 $clink = '';
 462                         }
 463                 // New unpatrolled pages
 464                 } else if( $rc->unpatrolled && $rc_type == RC_NEW ) {
 465                         $clink = $this->skin->makeKnownLinkObj( $rc->getTitle(), '', "rcid={$rc_id}" );
 466                 // Log entries
 467                 } else if( $rc_type == RC_LOG ) {
 468                         if( $rc_log_type ) {
 469                                 $logtitle = SpecialPage::getTitleFor( 'Log', $rc_log_type );
 470                                 $clink = '(' . $this->skin->makeKnownLinkObj( $logtitle, LogPage::logName($rc_log_type) ) . ')';
 471                         } else {
 472                                 $clink = $this->skin->makeLinkObj( $rc->getTitle(), '' );
 473                         }
 474                         $watched = false;
 475                 // Edits
 476                 } else {
 477                         $clink = $this->skin->makeKnownLinkObj( $rc->getTitle(), '' );
 478                 }
 479
 480                 # Don't show unusable diff links
 481                 if ( !ChangesList::userCan($rc,Revision::DELETED_TEXT) ) {
 482                         $showdifflinks = false;
 483                 }
 484
 485                 $time = $wgContLang->time( $rc_timestamp, true, true );
 486                 $rc->watched = $watched;
 487                 $rc->link = $clink;
 488                 $rc->timestamp = $time;
 489                 $rc->numberofWatchingusers = $baseRC->numberofWatchingusers;
 490
 491                 # Make "cur" and "diff" links
 492                 if( $rc->unpatrolled ) {
 493                         $rcIdQuery = "&rcid={$rc_id}";
 494                 } else {
 495                         $rcIdQuery = '';
 496                 }
 497                 $querycur = $curIdEq."&diff=0&oldid=$rc_this_oldid";
 498                 $querydiff = $curIdEq."&diff=$rc_this_oldid&oldid=$rc_last_oldid$rcIdQuery";
 499                 $aprops = ' tabindex="'.$baseRC->counter.'"';
 500                 $curLink = $this->skin->makeKnownLinkObj( $rc->getTitle(), $this->message['cur'], $querycur, '' ,'', $aprops );
 501
 502                 # Make "diff" an "cur" links
 503                 if( !$showdifflinks ) {
 504                    $curLink = $this->message['cur'];
 505                    $diffLink = $this->message['diff'];
 506                 } else if( $rc_type == RC_NEW || $rc_type == RC_LOG || $rc_type == RC_MOVE || $rc_type == RC_MOVE_OVER_REDIRECT ) {
 507                         if( $rc_type != RC_NEW ) {
 508                                 $curLink = $this->message['cur'];
 509                         }
 510                         $diffLink = $this->message['diff'];
 511                 } else {
 512                         $diffLink = $this->skin->makeKnownLinkObj( $rc->getTitle(), $this->message['diff'], $querydiff, '' ,'', $aprops );
 513                 }
 514
 515                 # Make "last" link
 516                 if( !$showdifflinks ) {
 517                     $lastLink = $this->message['last'];
 518                 } else if( $rc_last_oldid == 0 || $rc_type == RC_LOG || $rc_type == RC_MOVE || $rc_type == RC_MOVE_OVER_REDIRECT ) {
 519                         $lastLink = $this->message['last'];
 520                 } else {
 521                         $lastLink = $this->skin->makeKnownLinkObj( $rc->getTitle(), $this->message['last'],
 522                         $curIdEq.'&diff='.$rc_this_oldid.'&oldid='.$rc_last_oldid . $rcIdQuery );
 523                 }
 524
 525                 # Make user links
 526                 if( $this->isDeleted($rc,Revision::DELETED_USER) ) {
 527                         $rc->userlink = ' <span class="history-deleted">' . wfMsgHtml('rev-deleted-user') . '</span>';
 528                 } else {
 529                         $rc->userlink = $this->skin->userLink( $rc_user, $rc_user_text );
 530                         $rc->usertalklink = $this->skin->userToolLinks( $rc_user, $rc_user_text );
 531                 }
 532
 533                 $rc->lastlink = $lastLink;
 534                 $rc->curlink  = $curLink;
 535                 $rc->difflink = $diffLink;
 536
 537                 # Put accumulated information into the cache, for later display
 538                 # Page moves go on their own line
 539                 $title = $rc->getTitle();
 540                 $secureName = $title->getPrefixedDBkey();
 541                 if( $rc_type == RC_MOVE || $rc_type == RC_MOVE_OVER_REDIRECT ) {
 542                         # Use an @ character to prevent collision with page names
 543                         $this->rc_cache['@@' . ($this->rcMoveIndex++)] = array($rc);
 544                 } else {
 545                         # Logs are grouped by type
 546                         if( $rc_type == RC_LOG ){
 547                                 $secureName = SpecialPage::getTitleFor( 'Log', $rc_log_type )->getPrefixedDBkey();
 548                         }
 549                         if( !isset( $this->rc_cache[$secureName] ) ) {
 550                                 $this->rc_cache[$secureName] = array();
 551                         }
 552                         array_push( $this->rc_cache[$secureName], $rc );
 553                 }
 554                 return $ret;
 555         }
 556
 557         /**
 558          * Enhanced RC group
 559          */
 560         protected function recentChangesBlockGroup( $block ) {
 561                 global $wgLang, $wgContLang, $wgRCShowChangedSize;
 562                 $r = '<table cellpadding="0" cellspacing="0" border="0" style="background: none"><tr>';
 563
 564                 # Collate list of users
 565                 $userlinks = array();
 566                 # Other properties
 567                 $unpatrolled = $isnew = $newbie = false;
 568                 $curId = $currentRevision = 0;
 569                 # Some catalyst variables...
 570                 $namehidden = true;
 571                 $alllogs = true;
 572                 foreach( $block as $rcObj ) {
 573                         $oldid = $rcObj->mAttribs['rc_last_oldid'];
 574                         if( $rcObj->mAttribs['rc_type'] == RC_NEW ) {
 575                                 $isnew = true;
 576                         }
 577                         // If all log actions to this page were hidden, then don't
 578                         // give the name of the affected page for this block!
 579                         if( !$this->isDeleted( $rcObj, LogPage::DELETED_ACTION ) ) {
 580                                 $namehidden = false;
 581                         }
 582                         $u = $rcObj->userlink;
 583                         if( !isset( $userlinks[$u] ) ) {
 584                                 $userlinks[$u] = 0;
 585                         }
 586                         if( $rcObj->unpatrolled ) {
 587                                 $unpatrolled = true;
 588                         }
 589                         if( $rcObj->mAttribs['rc_type'] != RC_LOG ) {
 590                                 $alllogs = false;
 591                         }
 592                         if( self::userIsNew( $rcObj->mAttribs ) ) {
 593                                 $newbie = true;
 594                         }
 595                         # Get the latest entry with a page_id and oldid
 596                         # since logs may not have these.
 597                         if( !$curId && $rcObj->mAttribs['rc_cur_id'] ) {
 598                                 $curId = $rcObj->mAttribs['rc_cur_id'];
 599                         }
 600                         if( !$currentRevision && $rcObj->mAttribs['rc_this_oldid'] ) {
 601                                 $currentRevision = $rcObj->mAttribs['rc_this_oldid'];
 602                         }
 603
 604                         $bot = $rcObj->mAttribs['rc_bot'];
 605                         $userlinks[$u]++;
 606                 }
 607
 608                 # Sort the list and convert to text
 609                 krsort( $userlinks );
 610                 asort( $userlinks );
 611                 $users = array();
 612                 foreach( $userlinks as $userlink => $count) {
 613                         $text = $userlink;
 614                         $text .= $wgContLang->getDirMark();
 615                         if( $count > 1 ) {
 616                                 $text .= ' (' . $wgLang->formatNum( $count ) . '×)';
 617                         }
 618                         array_push( $users, $text );
 619                 }
 620
 621                 $users = ' <span class="changedby">[' . implode( $this->message['semicolon-separator'], $users ) . ']</span>';
 622
 623                 # Arrow
 624                 $rci = 'RCI'.$this->rcCacheIndex;
 625                 $rcl = 'RCL'.$this->rcCacheIndex;
 626                 $rcm = 'RCM'.$this->rcCacheIndex;
 627                 $toggleLink = "javascript:toggleVisibility('$rci','$rcm','$rcl')";
 628                 $tl  = '<span id="'.$rcm.'"><a href="'.$toggleLink.'">' . $this->sideArrow() . '</a></span>';
 629                 $tl .= '<span id="'.$rcl.'" style="display:none"><a href="'.$toggleLink.'">' . $this->downArrow() . '</a></span>';
 630                 $r .= '<td valign="top" style="white-space: nowrap"><tt>'.$tl.'&nbsp;';
 631
 632                 # Main line
 633                 $r .= $this->recentChangesFlags( $isnew, false, $unpatrolled, '&nbsp;', $bot, $newbie );
 634
 635                 # Timestamp
 636                 $r .= '&nbsp;'.$block[0]->timestamp.'&nbsp;</tt></td><td>';
 637
 638                 # Article link
 639                 if( $namehidden ) {
 640                         $r .= ' <span class="history-deleted">' . wfMsgHtml('rev-deleted-event') . '</span>';
 641                 } else {
 642                         $r .= $this->maybeWatchedLink( $block[0]->link, $block[0]->watched );
 643                 }
 644
 645                 $r .= $wgContLang->getDirMark();
 646
 647                 $curIdEq = 'curid=' . $curId;
 648                 # Changes message
 649                 $n = count($block);
 650                 static $nchanges = array();
 651                 if ( !isset( $nchanges[$n] ) ) {
 652                         $nchanges[$n] = wfMsgExt( 'nchanges', array( 'parsemag', 'escape' ), $wgLang->formatNum( $n ) );
 653                 }
 654                 # Total change link
 655                 $r .= ' ';
 656                 if( !$alllogs ) {
 657                         $r .= '(';
 658                         if( !ChangesList::userCan($rcObj,Revision::DELETED_TEXT) ) {
 659                                 $r .= $nchanges[$n];
 660                         } else if( $isnew ) {
 661                                 $r .= $nchanges[$n];
 662                         } else {
 663                                 $r .= $this->skin->makeKnownLinkObj( $block[0]->getTitle(),
 664                                         $nchanges[$n], $curIdEq."&diff=$currentRevision&oldid=$oldid" );
 665                         }
 666                         $r .= ') . . ';
 667                 }
 668
 669                 # Character difference (does not apply if only log items)
 670                 if( $wgRCShowChangedSize && !$alllogs ) {
 671                         $last = 0;
 672                         $first = count($block) - 1;
 673                         # Some events (like logs) have an "empty" size, so we need to skip those...
 674                         while( $last < $first && $block[$last]->mAttribs['rc_new_len'] === NULL ) {
 675                                 $last++;
 676                         }
 677                         while( $first > $last && $block[$first]->mAttribs['rc_old_len'] === NULL ) {
 678                                 $first--;
 679                         }
 680                         # Get net change
 681                         $chardiff = $rcObj->getCharacterDifference( $block[$first]->mAttribs['rc_old_len'],
 682                                 $block[$last]->mAttribs['rc_new_len'] );
 683
 684                         if( $chardiff == '' ) {
 685                                 $r .= ' ';
 686                         } else {
 687                                 $r .= ' ' . $chardiff. ' . . ';
 688                         }
 689                 }
 690
 691                 # History
 692                 if( $alllogs ) {
 693                         // don't show history link for logs
 694                 } else if( $namehidden || !$block[0]->getTitle()->exists() ) {
 695                         $r .= '(' . $this->message['history'] . ')';
 696                 } else {
 697                         $r .= '(' . $this->skin->makeKnownLinkObj( $block[0]->getTitle(),
 698                                 $this->message['history'], $curIdEq.'&action=history' ) . ')';
 699                 }
 700
 701                 $r .= $users;
 702                 $r .= $this->numberofWatchingusers($block[0]->numberofWatchingusers);
 703
 704                 $r .= "</td></tr></table>\n";
 705
 706                 # Sub-entries
 707                 $r .= '<div id="'.$rci.'" style="display:none;"><table cellpadding="0" cellspacing="0"  border="0" style="background: none">';
 708                 foreach( $block as $rcObj ) {
 709                         # Get rc_xxxx variables
 710                         // FIXME: Would be good to replace this extract() call with something that explicitly initializes local variables.
 711                         extract( $rcObj->mAttribs );
 712
 713                         #$r .= '<tr><td valign="top">'.$this->spacerArrow();
 714                         $r .= '<tr><td valign="top">';
 715                         $r .= '<tt>'.$this->spacerIndent() . $this->spacerIndent();
 716                         $newbie = self::userIsNew( $rcObj->mAttribs );
 717                         $r .= $this->recentChangesFlags( $rc_new, $rc_minor, $rcObj->unpatrolled, '&nbsp;', $rc_bot, $newbie );
 718                         $r .= '&nbsp;</tt></td><td valign="top">';
 719
 720                         $o = '';
 721                         if( $rc_this_oldid != 0 ) {
 722                                 $o = 'oldid='.$rc_this_oldid;
 723                         }
 724                         # Log timestamp
 725                         if( $rc_type == RC_LOG ) {
 726                                 $link = '<tt>'.$rcObj->timestamp.'</tt> ';
 727                         # Revision link
 728                         } else if( !ChangesList::userCan($rcObj,Revision::DELETED_TEXT) ) {
 729                                 $link = '<span class="history-deleted"><tt>'.$rcObj->timestamp.'</tt></span> ';
 730                         } else {
 731                                 $rcIdEq = ($rcObj->unpatrolled && $rc_type == RC_NEW) ? '&rcid='.$rcObj->mAttribs['rc_id'] : '';
 732
 733                                 $link = '<tt>'.$this->skin->makeKnownLinkObj( $rcObj->getTitle(), $rcObj->timestamp, $curIdEq.'&'.$o.$rcIdEq ).'</tt>';
 734                                 if( $this->isDeleted($rcObj,Revision::DELETED_TEXT) )
 735                                         $link = '<span class="history-deleted">'.$link.'</span> ';
 736                         }
 737                         $r .= $link;
 738
 739                         if ( !$rc_type == RC_LOG || $rc_type == RC_NEW ) {
 740                                 $r .= ' (';
 741                                 $r .= $rcObj->curlink;
 742                                 $r .= $this->message['semicolon-separator'];
 743                                 $r .= $rcObj->lastlink;
 744                                 $r .= ')';
 745                         }
 746                         $r .= ' . . ';
 747
 748                         # Character diff
 749                         if( $wgRCShowChangedSize ) {
 750                                 $r .= ( $rcObj->getCharacterDifference() == '' ? '' : $rcObj->getCharacterDifference() . ' . . ' ) ;
 751                         }
 752                         # User links
 753                         $r .= $rcObj->userlink;
 754                         $r .= $rcObj->usertalklink;
 755                         // log action
 756                         parent::insertAction( $r, $rcObj );
 757                         // log comment
 758                         parent::insertComment( $r, $rcObj );
 759                         # Mark revision as deleted
 760                         if( !$rc_log_type && $this->isDeleted($rcObj,Revision::DELETED_TEXT) ) {
 761                                 $r .= ' <tt>' . wfMsgHtml( 'deletedrev' ) . '</tt>';
 762                         }
 763
 764                         $r .= "</td></tr>\n";
 765                 }
 766                 $r .= "</table></div>\n";
 767
 768                 $this->rcCacheIndex++;
 769                 return $r;
 770         }
 771
 772         protected function maybeWatchedLink( $link, $watched=false ) {
 773                 if( $watched ) {
 774                         // FIXME: css style might be more appropriate
 775                         return '<strong class="mw-watched">' . $link . '</strong>';
 776                 } else {
 777                         return $link;
 778                 }
 779         }
 780
 781         /**
 782          * Generate HTML for an arrow or placeholder graphic
 783          * @param string $dir one of '', 'd', 'l', 'r'
 784          * @param string $alt text
 785          * @return string HTML <img> tag
 786          */
 787         protected function arrow( $dir, $alt='' ) {
 788                 global $wgStylePath;
 789                 $encUrl = htmlspecialchars( $wgStylePath . '/common/images/Arr_' . $dir . '.png' );
 790                 $encAlt = htmlspecialchars( $alt );
 791                 return "<img src=\"$encUrl\" width=\"12\" height=\"12\" alt=\"$encAlt\" />";
 792         }
 793
 794         /**
 795          * Generate HTML for a right- or left-facing arrow,
 796          * depending on language direction.
 797          * @return string HTML <img> tag
 798          */
 799         protected function sideArrow() {
 800                 global $wgContLang;
 801                 $dir = $wgContLang->isRTL() ? 'l' : 'r';
 802                 return $this->arrow( $dir, '+' );
 803         }
 804
 805         /**
 806          * Generate HTML for a down-facing arrow
 807          * depending on language direction.
 808          * @return string HTML <img> tag
 809          */
 810         protected function downArrow() {
 811                 return $this->arrow( 'd', '-' );
 812         }
 813
 814         /**
 815          * Generate HTML for a spacer image
 816          * @return string HTML <img> tag
 817          */
 818         protected function spacerArrow() {
 819                 return $this->arrow( '', ' ' );
 820         }
 821
 822         /**
 823          * Add a set of spaces
 824          * @return string HTML <td> tag
 825          */
 826         protected function spacerIndent() {
 827                 return '&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;';
 828         }
 829
 830         /**
 831          * Enhanced RC ungrouped line.
 832          * @return string a HTML formated line (generated using $r)
 833          */
 834         protected function recentChangesBlockLine( $rcObj ) {
 835                 global $wgContLang, $wgRCShowChangedSize;
 836
 837                 # Get rc_xxxx variables
 838                 // FIXME: Would be good to replace this extract() call with something that explicitly initializes local variables.
 839                 extract( $rcObj->mAttribs );
 840                 $curIdEq = 'curid='.$rc_cur_id;
 841
 842                 $r = '<table cellspacing="0" cellpadding="0" border="0" style="background: none"><tr>';
 843                 $r .= '<td valign="top" style="white-space: nowrap"><tt>' . $this->spacerArrow() . '&nbsp;';
 844
 845                 # Flag and Timestamp
 846                 if( $rc_type == RC_MOVE || $rc_type == RC_MOVE_OVER_REDIRECT ) {
 847                         $r .= '&nbsp;&nbsp;&nbsp;&nbsp;'; // 4 flags -> 4 spaces
 848                 } else {
 849                         $newbie = self::userIsNew( $rcObj->mAttribs );
 850                         $r .= $this->recentChangesFlags( $rc_type == RC_NEW, $rc_minor, $rcObj->unpatrolled,
 851                                 '&nbsp;', $rc_bot, $newbie );
 852                 }
 853                 $r .= '&nbsp;'.$rcObj->timestamp.'&nbsp;</tt></td><td>';
 854
 855                 # Article or log link
 856                 if( $rc_log_type ) {
 857                         $logtitle = Title::newFromText( "Log/$rc_log_type", NS_SPECIAL );
 858                         $logname = LogPage::logName( $rc_log_type );
 859                         $r .= '(' . $this->skin->makeKnownLinkObj($logtitle, $logname ) . ')';
 860                 } else if( !$this->userCan($rcObj,Revision::DELETED_TEXT) ) {
 861                         $r .= '<span class="history-deleted">' . $rcObj->link . '</span>';
 862                 } else {
 863                         $r .= $this->maybeWatchedLink( $rcObj->link, $rcObj->watched );
 864                 }
 865
 866                 # Diff and hist links
 867                 if( $rc_type != RC_LOG ) {
 868                    $r .= ' ('. $rcObj->difflink . $this->message['semicolon-separator'];
 869                    $r .= $this->skin->makeKnownLinkObj( $rcObj->getTitle(), wfMsg( 'hist' ), $curIdEq.'&action=history' ) . ')';
 870                 }
 871                 $r .= ' . . ';
 872
 873                 # Character diff
 874                 if( $wgRCShowChangedSize ) {
 875                         $r .= ( $rcObj->getCharacterDifference() == '' ? '' : '&nbsp;' . $rcObj->getCharacterDifference() . ' . . ' ) ;
 876                 }
 877
 878                 # User/talk
 879                 $r .= ' '.$rcObj->userlink . $rcObj->usertalklink;
 880
 881                 # Log action (if any)
 882                 if( $rc_log_type ) {
 883                         if( $this->isDeleted($rcObj,LogPage::DELETED_ACTION) ) {
 884                                 $r .= ' <span class="history-deleted">' . wfMsgHtml('rev-deleted-event') . '</span>';
 885                         } else {
 886                                 $r .= ' ' . LogPage::actionText( $rc_log_type, $rc_log_action, $rcObj->getTitle(),
 887                                         $this->skin, LogPage::extractParams($rc_params), true, true );
 888                         }
 889                 }
 890
 891                 # Edit or log comment
 892                 if( $rc_type != RC_MOVE && $rc_type != RC_MOVE_OVER_REDIRECT ) {
 893                         // log comment
 894                         if ( $this->isDeleted($rcObj,LogPage::DELETED_COMMENT) ) {
 895                            $r .= ' <span class="history-deleted">' . wfMsg('rev-deleted-comment') . '</span>';
 896                         } else {
 897                           $r .= $this->skin->commentBlock( $rc_comment, $rcObj->getTitle() );
 898                         }
 899                 }
 900
 901                 # Show how many people are watching this if enabled
 902                 $r .= $this->numberofWatchingusers($rcObj->numberofWatchingusers);
 903
 904                 $r .= "</td></tr></table>\n";
 905                 return $r;
 906         }
 907
 908         /**
 909          * If enhanced RC is in use, this function takes the previously cached
 910          * RC lines, arranges them, and outputs the HTML
 911          */
 912         protected function recentChangesBlock() {
 913                 if( count ( $this->rc_cache ) == 0 ) {
 914                         return '';
 915                 }
 916                 $blockOut = '';
 917                 foreach( $this->rc_cache as $block ) {
 918                         if( count( $block ) < 2 ) {
 919                                 $blockOut .= $this->recentChangesBlockLine( array_shift( $block ) );
 920                         } else {
 921                                 $blockOut .= $this->recentChangesBlockGroup( $block );
 922                         }
 923                 }
 924
 925                 return '<div>'.$blockOut.'</div>';
 926         }
 927
 928         /**
 929          * Returns text for the end of RC
 930          * If enhanced RC is in use, returns pretty much all the text
 931          */
 932         public function endRecentChangesList() {
 933                 return $this->recentChangesBlock() . parent::endRecentChangesList();
 934         }
 935
 936 }