includes/changes/EnhancedChangesList.php

   1 <?php
   2 /**
   3  * Generates a list of changes using an Enhanced system (uses javascript).
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  * http://www.gnu.org/copyleft/gpl.html
  19  *
  20  * @file
  21  */
  22
  23 class EnhancedChangesList extends ChangesList {
  24
  25         /**
  26          * @var RCCacheEntryFactory
  27          */
  28         protected $cacheEntryFactory;
  29
  30         /**
  31          * @var array Array of array of RCCacheEntry
  32          */
  33         protected $rc_cache;
  34
  35         /**
  36          * @param IContextSource|Skin $obj
  37          * @throws MWException
  38          */
  39         public function __construct( $obj ) {
  40                 if ( $obj instanceof Skin ) {
  41                         // @todo: deprecate constructing with Skin
  42                         $context = $obj->getContext();
  43                 } else {
  44                         if ( !$obj instanceof IContextSource ) {
  45                                 throw new MWException( 'EnhancedChangesList must be constructed with a '
  46                                         . 'context source or skin.' );
  47                         }
  48
  49                         $context = $obj;
  50                 }
  51
  52                 parent::__construct( $context );
  53
  54                 // message is set by the parent ChangesList class
  55                 $this->cacheEntryFactory = new RCCacheEntryFactory(
  56                         $context,
  57                         $this->message
  58                 );
  59         }
  60
  61         /**
  62          * Add the JavaScript file for enhanced changeslist
  63          * @return string
  64          */
  65         public function beginRecentChangesList() {
  66                 $this->rc_cache = array();
  67                 $this->rcMoveIndex = 0;
  68                 $this->rcCacheIndex = 0;
  69                 $this->lastdate = '';
  70                 $this->rclistOpen = false;
  71                 $this->getOutput()->addModuleStyles( array(
  72                         'mediawiki.special.changeslist',
  73                         'mediawiki.special.changeslist.enhanced',
  74                 ) );
  75                 $this->getOutput()->addModules( array(
  76                         'jquery.makeCollapsible',
  77                         'mediawiki.icon',
  78                 ) );
  79
  80                 return '<div class="mw-changeslist">';
  81         }
  82
  83         /**
  84          * Format a line for enhanced recentchange (aka with javascript and block of lines).
  85          *
  86          * @param RecentChange $baseRC
  87          * @param bool $watched
  88          *
  89          * @return string
  90          */
  91         public function recentChangesLine( &$baseRC, $watched = false ) {
  92
  93                 $date = $this->getLanguage()->userDate(
  94                         $baseRC->mAttribs['rc_timestamp'],
  95                         $this->getUser()
  96                 );
  97
  98                 $ret = '';
  99
 100                 # If it's a new day, add the headline and flush the cache
 101                 if ( $date != $this->lastdate ) {
 102                         # Process current cache
 103                         $ret = $this->recentChangesBlock();
 104                         $this->rc_cache = array();
 105                         $ret .= Xml::element( 'h4', null, $date ) . "\n";
 106                         $this->lastdate = $date;
 107                 }
 108
 109                 $cacheEntry = $this->cacheEntryFactory->newFromRecentChange( $baseRC, $watched );
 110                 $this->addCacheEntry( $cacheEntry );
 111
 112                 return $ret;
 113         }
 114
 115         /**
 116          * Put accumulated information into the cache, for later display.
 117          * Page moves go on their own line.
 118          *
 119          * @param RCCacheEntry $cacheEntry
 120          */
 121         protected function addCacheEntry( RCCacheEntry $cacheEntry ) {
 122                 $cacheGroupingKey = $this->makeCacheGroupingKey( $cacheEntry );
 123
 124                 if ( !isset( $this->rc_cache[$cacheGroupingKey] ) ) {
 125                         $this->rc_cache[$cacheGroupingKey] = array();
 126                 }
 127
 128                 array_push( $this->rc_cache[$cacheGroupingKey], $cacheEntry );
 129         }
 130
 131         /**
 132          * @todo use rc_source to group, if set; fallback to rc_type
 133          *
 134          * @param RCCacheEntry $cacheEntry
 135          *
 136          * @return string
 137          */
 138         protected function makeCacheGroupingKey( RCCacheEntry $cacheEntry ) {
 139                 $title = $cacheEntry->getTitle();
 140                 $cacheGroupingKey = $title->getPrefixedDBkey();
 141
 142                 $type = $cacheEntry->mAttribs['rc_type'];
 143
 144                 if ( $type == RC_LOG ) {
 145                         // Group by log type
 146                         $cacheGroupingKey = SpecialPage::getTitleFor(
 147                                 'Log',
 148                                 $cacheEntry->mAttribs['rc_log_type']
 149                         )->getPrefixedDBkey();
 150                 }
 151
 152                 return $cacheGroupingKey;
 153         }
 154
 155         /**
 156          * Enhanced RC group
 157          * @param RCCacheEntry[] $block
 158          * @return string
 159          */
 160         protected function recentChangesBlockGroup( $block ) {
 161
 162                 # Add the namespace and title of the block as part of the class
 163                 $classes = array( 'mw-collapsible', 'mw-collapsed', 'mw-enhanced-rc' );
 164                 if ( $block[0]->mAttribs['rc_log_type'] ) {
 165                         # Log entry
 166                         $classes[] = Sanitizer::escapeClass( 'mw-changeslist-log-'
 167                                 . $block[0]->mAttribs['rc_log_type'] );
 168                 } else {
 169                         $classes[] = Sanitizer::escapeClass( 'mw-changeslist-ns'
 170                                 . $block[0]->mAttribs['rc_namespace'] . '-' . $block[0]->mAttribs['rc_title'] );
 171                 }
 172                 $classes[] = $block[0]->watched && $block[0]->mAttribs['rc_timestamp'] >= $block[0]->watched
 173                         ? 'mw-changeslist-line-watched' : 'mw-changeslist-line-not-watched';
 174                 $r = Html::openElement( 'table', array( 'class' => $classes ) ) .
 175                         Html::openElement( 'tr' );
 176
 177                 # Collate list of users
 178                 $userlinks = array();
 179                 # Other properties
 180                 $unpatrolled = false;
 181                 $isnew = false;
 182                 $allBots = true;
 183                 $allMinors = true;
 184                 $curId = 0;
 185                 # Some catalyst variables...
 186                 $namehidden = true;
 187                 $allLogs = true;
 188                 $RCShowChangedSize = $this->getConfig()->get( 'RCShowChangedSize' );
 189                 foreach ( $block as $rcObj ) {
 190                         if ( $rcObj->mAttribs['rc_type'] == RC_NEW ) {
 191                                 $isnew = true;
 192                         }
 193                         // If all log actions to this page were hidden, then don't
 194                         // give the name of the affected page for this block!
 195                         if ( !$this->isDeleted( $rcObj, LogPage::DELETED_ACTION ) ) {
 196                                 $namehidden = false;
 197                         }
 198                         $u = $rcObj->userlink;
 199                         if ( !isset( $userlinks[$u] ) ) {
 200                                 $userlinks[$u] = 0;
 201                         }
 202                         if ( $rcObj->unpatrolled ) {
 203                                 $unpatrolled = true;
 204                         }
 205                         if ( $rcObj->mAttribs['rc_type'] != RC_LOG ) {
 206                                 $allLogs = false;
 207                         }
 208                         # Get the latest entry with a page_id and oldid
 209                         # since logs may not have these.
 210                         if ( !$curId && $rcObj->mAttribs['rc_cur_id'] ) {
 211                                 $curId = $rcObj->mAttribs['rc_cur_id'];
 212                         }
 213
 214                         if ( !$rcObj->mAttribs['rc_bot'] ) {
 215                                 $allBots = false;
 216                         }
 217                         if ( !$rcObj->mAttribs['rc_minor'] ) {
 218                                 $allMinors = false;
 219                         }
 220
 221                         $userlinks[$u]++;
 222                 }
 223
 224                 # Sort the list and convert to text
 225                 krsort( $userlinks );
 226                 asort( $userlinks );
 227                 $users = array();
 228                 foreach ( $userlinks as $userlink => $count ) {
 229                         $text = $userlink;
 230                         $text .= $this->getLanguage()->getDirMark();
 231                         if ( $count > 1 ) {
 232                                 // @todo FIXME: Hardcoded '×'. Should be a message.
 233                                 $formattedCount = $this->getLanguage()->formatNum( $count ) . '×';
 234                                 $text .= ' ' . $this->msg( 'parentheses' )->rawParams( $formattedCount )->escaped();
 235                         }
 236                         array_push( $users, $text );
 237                 }
 238
 239                 $users = ' <span class="changedby">'
 240                         . $this->msg( 'brackets' )->rawParams(
 241                                 implode( $this->message['semicolon-separator'], $users )
 242                         )->escaped() . '</span>';
 243
 244                 $tl = '<span class="mw-collapsible-toggle mw-collapsible-arrow ' .
 245                         'mw-enhancedchanges-arrow mw-enhancedchanges-arrow-space"></span>';
 246                 $r .= "<td>$tl</td>";
 247
 248                 # Main line
 249                 $r .= '<td class="mw-enhanced-rc">' . $this->recentChangesFlags( array(
 250                         'newpage' => $isnew, # show, when one have this flag
 251                         'minor' => $allMinors, # show only, when all have this flag
 252                         'unpatrolled' => $unpatrolled, # show, when one have this flag
 253                         'bot' => $allBots, # show only, when all have this flag
 254                 ) );
 255
 256                 # Timestamp
 257                 $r .= '&#160;' . $block[0]->timestamp . '&#160;</td><td>';
 258
 259                 # Article link
 260                 if ( $namehidden ) {
 261                         $r .= ' <span class="history-deleted">' .
 262                                 $this->msg( 'rev-deleted-event' )->escaped() . '</span>';
 263                 } elseif ( $allLogs ) {
 264                         $r .= $this->maybeWatchedLink( $block[0]->link, $block[0]->watched );
 265                 } else {
 266                         $this->insertArticleLink( $r, $block[0], $block[0]->unpatrolled, $block[0]->watched );
 267                 }
 268
 269                 $r .= $this->getLanguage()->getDirMark();
 270
 271                 $queryParams['curid'] = $curId;
 272
 273                 $r .= $this->getLogText( $block, $queryParams, $allLogs, $isnew, $namehidden );
 274
 275                 $r .= ' <span class="mw-changeslist-separator">. .</span> ';
 276
 277                 # Character difference (does not apply if only log items)
 278                 if ( $RCShowChangedSize && !$allLogs ) {
 279                         $last = 0;
 280                         $first = count( $block ) - 1;
 281                         # Some events (like logs) have an "empty" size, so we need to skip those...
 282                         while ( $last < $first && $block[$last]->mAttribs['rc_new_len'] === null ) {
 283                                 $last++;
 284                         }
 285                         while ( $first > $last && $block[$first]->mAttribs['rc_old_len'] === null ) {
 286                                 $first--;
 287                         }
 288                         # Get net change
 289                         $chardiff = $this->formatCharacterDifference( $block[$first], $block[$last] );
 290
 291                         if ( $chardiff == '' ) {
 292                                 $r .= ' ';
 293                         } else {
 294                                 $r .= ' ' . $chardiff . ' <span class="mw-changeslist-separator">. .</span> ';
 295                         }
 296                 }
 297
 298                 $r .= $users;
 299                 $r .= $this->numberofWatchingusers( $block[0]->numberofWatchingusers );
 300                 $r .= '</td></tr>';
 301
 302                 # Sub-entries
 303                 foreach ( $block as $rcObj ) {
 304                         # Classes to apply -- TODO implement
 305                         $classes = array();
 306                         $type = $rcObj->mAttribs['rc_type'];
 307                         $data = array();
 308
 309                         $trClass = $rcObj->watched && $rcObj->mAttribs['rc_timestamp'] >= $rcObj->watched
 310                                 ? ' class="mw-enhanced-watched"' : '';
 311                         $separator = ' <span class="mw-changeslist-separator">. .</span> ';
 312
 313                         $data['recentChangesFlags'] = array(
 314                                 'newpage' => $type == RC_NEW,
 315                                 'minor' => $rcObj->mAttribs['rc_minor'],
 316                                 'unpatrolled' => $rcObj->unpatrolled,
 317                                 'bot' => $rcObj->mAttribs['rc_bot'],
 318                         );
 319
 320                         $params = $queryParams;
 321
 322                         if ( $rcObj->mAttribs['rc_this_oldid'] != 0 ) {
 323                                 $params['oldid'] = $rcObj->mAttribs['rc_this_oldid'];
 324                         }
 325
 326                         # Log timestamp
 327                         if ( $type == RC_LOG ) {
 328                                 $link = $rcObj->timestamp;
 329                         # Revision link
 330                         } elseif ( !ChangesList::userCan( $rcObj, Revision::DELETED_TEXT, $this->getUser() ) ) {
 331                                 $link = '<span class="history-deleted">' . $rcObj->timestamp . '</span> ';
 332                         } else {
 333                                 $link = Linker::linkKnown(
 334                                         $rcObj->getTitle(),
 335                                         $rcObj->timestamp,
 336                                         array(),
 337                                         $params
 338                                 );
 339                                 if ( $this->isDeleted( $rcObj, Revision::DELETED_TEXT ) ) {
 340                                         $link = '<span class="history-deleted">' . $link . '</span> ';
 341                                 }
 342                         }
 343                         $data['timestampLink'] = $link;
 344
 345                         $currentAndLastLinks = '';
 346                         if ( !$type == RC_LOG || $type == RC_NEW ) {
 347                                 $currentAndLastLinks .= ' ' . $this->msg( 'parentheses' )->rawParams(
 348                                         $rcObj->curlink .
 349                                                 $this->message['pipe-separator'] .
 350                                                 $rcObj->lastlink
 351                                 )->escaped();
 352                         }
 353                         $data['currentAndLastLinks'] = $currentAndLastLinks;
 354                         $data['separatorAfterCurrentAndLastLinks'] = $separator;
 355
 356                         # Character diff
 357                         if ( $RCShowChangedSize ) {
 358                                 $cd = $this->formatCharacterDifference( $rcObj );
 359                                 if ( $cd !== '' ) {
 360                                         $data['characterDiff'] = $cd;
 361                                         $data['separatorAfterCharacterDiff'] = $separator;
 362                                 }
 363                         }
 364
 365                         if ( $rcObj->mAttribs['rc_type'] == RC_LOG ) {
 366                                 $data['logEntry'] = $this->insertLogEntry( $rcObj );
 367                         } else {
 368                                 # User links
 369                                 $data['userLink'] = $rcObj->userlink;
 370                                 $data['userTalkLink'] = $rcObj->usertalklink;
 371                                 $data['comment'] = $this->insertComment( $rcObj );
 372                         }
 373
 374                         # Rollback
 375                         $data['rollback'] = $this->getRollback( $rcObj );
 376
 377                         # Tags
 378                         $data['tags'] = $this->getTags( $rcObj, $classes );
 379
 380                         // give the hook a chance to modify the data
 381                         $success = Hooks::run( 'EnhancedChangesListModifyLineData',
 382                                 array( $this, &$data, $block, $rcObj ) );
 383                         if ( !$success ) {
 384                                 // skip entry if hook aborted it
 385                                 continue;
 386                         }
 387
 388                         $line = '<tr' . $trClass . '><td></td><td class="mw-enhanced-rc">';
 389                         if ( isset( $data['recentChangesFlags'] ) ) {
 390                                 $line .= $this->recentChangesFlags( $data['recentChangesFlags'] );
 391                                 unset( $data['recentChangesFlags'] );
 392                         }
 393                         $line .= '&#160;</td><td class="mw-enhanced-rc-nested">';
 394
 395                         if ( isset( $data['timestampLink'] ) ) {
 396                                 $line .= '<span class="mw-enhanced-rc-time">' . $data['timestampLink'] . '</span>';
 397                                 unset( $data['timestampLink'] );
 398                         }
 399
 400                         // everything else: makes it easier for extensions to add or remove data
 401                         $line .= implode( '', $data );
 402
 403                         $line .= "</td></tr>\n";
 404
 405                         $r .= $line;
 406                 }
 407                 $r .= "</table>\n";
 408
 409                 $this->rcCacheIndex++;
 410
 411                 return $r;
 412         }
 413
 414         /**
 415          * Generates amount of changes (linking to diff ) & link to history.
 416          *
 417          * @param array $block
 418          * @param array $queryParams
 419          * @param bool $allLogs
 420          * @param bool $isnew
 421          * @param bool $namehidden
 422          * @return string
 423          */
 424         protected function getLogText( $block, $queryParams, $allLogs, $isnew, $namehidden ) {
 425                 # Changes message
 426                 static $nchanges = array();
 427                 static $sinceLastVisitMsg = array();
 428
 429                 $n = count( $block );
 430                 if ( !isset( $nchanges[$n] ) ) {
 431                         $nchanges[$n] = $this->msg( 'nchanges' )->numParams( $n )->escaped();
 432                 }
 433
 434                 $sinceLast = 0;
 435                 $unvisitedOldid = null;
 436                 /** @var $rcObj RCCacheEntry */
 437                 foreach ( $block as $rcObj ) {
 438                         // Same logic as below inside main foreach
 439                         if ( $rcObj->watched && $rcObj->mAttribs['rc_timestamp'] >= $rcObj->watched ) {
 440                                 $sinceLast++;
 441                                 $unvisitedOldid = $rcObj->mAttribs['rc_last_oldid'];
 442                         }
 443                 }
 444                 if ( !isset( $sinceLastVisitMsg[$sinceLast] ) ) {
 445                         $sinceLastVisitMsg[$sinceLast] =
 446                                 $this->msg( 'enhancedrc-since-last-visit' )->numParams( $sinceLast )->escaped();
 447                 }
 448
 449                 $currentRevision = 0;
 450                 foreach ( $block as $rcObj ) {
 451                         if ( !$currentRevision ) {
 452                                 $currentRevision = $rcObj->mAttribs['rc_this_oldid'];
 453                         }
 454                 }
 455
 456                 # Total change link
 457                 $links = array();
 458                 /** @var $block0 RecentChange */
 459                 $block0 = $block[0];
 460                 $last = $block[count( $block ) - 1];
 461                 if ( !$allLogs ) {
 462                         if ( !ChangesList::userCan( $rcObj, Revision::DELETED_TEXT, $this->getUser() ) ) {
 463                                 $links['total-changes'] = $nchanges[$n];
 464                         } elseif ( $isnew ) {
 465                                 $links['total-changes'] = $nchanges[$n];
 466                         } else {
 467                                 $links['total-changes'] = Linker::link(
 468                                         $block0->getTitle(),
 469                                         $nchanges[$n],
 470                                         array(),
 471                                         $queryParams + array(
 472                                                 'diff' => $currentRevision,
 473                                                 'oldid' => $last->mAttribs['rc_last_oldid'],
 474                                         ),
 475                                         array( 'known', 'noclasses' )
 476                                 );
 477                                 if ( $sinceLast > 0 && $sinceLast < $n ) {
 478                                         $links['total-changes-since-last'] = Linker::link(
 479                                                         $block0->getTitle(),
 480                                                         $sinceLastVisitMsg[$sinceLast],
 481                                                         array(),
 482                                                         $queryParams + array(
 483                                                                 'diff' => $currentRevision,
 484                                                                 'oldid' => $unvisitedOldid,
 485                                                         ),
 486                                                         array( 'known', 'noclasses' )
 487                                                 );
 488                                 }
 489                         }
 490                 }
 491
 492                 # History
 493                 if ( $allLogs ) {
 494                         // don't show history link for logs
 495                 } elseif ( $namehidden || !$block0->getTitle()->exists() ) {
 496                         $links['history'] = $this->message['enhancedrc-history'];
 497                 } else {
 498                         $params = $queryParams;
 499                         $params['action'] = 'history';
 500
 501                         $links['history'] = Linker::linkKnown(
 502                                         $block0->getTitle(),
 503                                         $this->message['enhancedrc-history'],
 504                                         array(),
 505                                         $params
 506                                 );
 507                 }
 508
 509                 # Allow others to alter, remove or add to these links
 510                 Hooks::run( 'EnhancedChangesList::getLogText',
 511                         array( $this, &$links, $block ) );
 512
 513                 if ( !$links ) {
 514                         return '';
 515                 }
 516
 517                 $logtext = implode( $this->message['pipe-separator'], $links );
 518                 $logtext = $this->msg( 'parentheses' )->rawParams( $logtext )->escaped();
 519                 return ' ' . $logtext;
 520         }
 521
 522         /**
 523          * Enhanced RC ungrouped line.
 524          *
 525          * @param RecentChange|RCCacheEntry $rcObj
 526          * @return string A HTML formatted line (generated using $r)
 527          */
 528         protected function recentChangesBlockLine( $rcObj ) {
 529                 $data = array();
 530
 531                 $query['curid'] = $rcObj->mAttribs['rc_cur_id'];
 532
 533                 $type = $rcObj->mAttribs['rc_type'];
 534                 $logType = $rcObj->mAttribs['rc_log_type'];
 535                 $classes = array( 'mw-enhanced-rc' );
 536                 if ( $logType ) {
 537                         # Log entry
 538                         $classes[] = Sanitizer::escapeClass( 'mw-changeslist-log-' . $logType );
 539                 } else {
 540                         $classes[] = Sanitizer::escapeClass( 'mw-changeslist-ns' .
 541                                 $rcObj->mAttribs['rc_namespace'] . '-' . $rcObj->mAttribs['rc_title'] );
 542                 }
 543                 $classes[] = $rcObj->watched && $rcObj->mAttribs['rc_timestamp'] >= $rcObj->watched
 544                         ? 'mw-changeslist-line-watched' : 'mw-changeslist-line-not-watched';
 545
 546                 # Flag and Timestamp
 547                 $data['recentChangesFlags'] = array(
 548                         'newpage' => $type == RC_NEW,
 549                         'minor' => $rcObj->mAttribs['rc_minor'],
 550                         'unpatrolled' => $rcObj->unpatrolled,
 551                         'bot' => $rcObj->mAttribs['rc_bot'],
 552                 );
 553                 // timestamp is not really a link here, but is called timestampLink
 554                 // for consistency with EnhancedChangesListModifyLineData
 555                 $data['timestampLink'] = $rcObj->timestamp;
 556
 557                 # Article or log link
 558                 if ( $logType ) {
 559                         $logPage = new LogPage( $logType );
 560                         $logTitle = SpecialPage::getTitleFor( 'Log', $logType );
 561                         $logName = $logPage->getName()->escaped();
 562                         $data['logLink'] = $this->msg( 'parentheses' )
 563                                 ->rawParams( Linker::linkKnown( $logTitle, $logName ) )->escaped();
 564                 } else {
 565                         $data['articleLink'] = $this->getArticleLink( $rcObj, $rcObj->unpatrolled, $rcObj->watched );
 566                 }
 567
 568                 # Diff and hist links
 569                 if ( $type != RC_LOG ) {
 570                         $query['action'] = 'history';
 571                         $data['historyLink'] = ' ' . $this->msg( 'parentheses' )
 572                                 ->rawParams( $rcObj->difflink . $this->message['pipe-separator'] . Linker::linkKnown(
 573                                         $rcObj->getTitle(),
 574                                         $this->message['hist'],
 575                                         array(),
 576                                         $query
 577                                 ) )->escaped();
 578                 }
 579                 $data['separatorAfterLinks'] = ' <span class="mw-changeslist-separator">. .</span> ';
 580
 581                 # Character diff
 582                 if ( $this->getConfig()->get( 'RCShowChangedSize' ) ) {
 583                         $cd = $this->formatCharacterDifference( $rcObj );
 584                         if ( $cd !== '' ) {
 585                                 $data['characterDiff'] = $cd;
 586                                 $data['separatorAftercharacterDiff'] = ' <span class="mw-changeslist-separator">. .</span> ';
 587                         }
 588                 }
 589
 590                 if ( $type == RC_LOG ) {
 591                         $data['logEntry'] = $this->insertLogEntry( $rcObj );
 592                 } else {
 593                         $data['userLink'] = $rcObj->userlink;
 594                         $data['userTalkLink'] = $rcObj->usertalklink;
 595                         $data['comment'] = $this->insertComment( $rcObj );
 596                         $data['rollback'] = $this->getRollback( $rcObj );
 597                 }
 598
 599                 # Tags
 600                 $data['tags'] = $this->getTags( $rcObj, $classes );
 601
 602                 # Show how many people are watching this if enabled
 603                 $data['watchingUsers'] = $this->numberofWatchingusers( $rcObj->numberofWatchingusers );
 604
 605                 // give the hook a chance to modify the data
 606                 $success = Hooks::run( 'EnhancedChangesListModifyBlockLineData',
 607                         array( $this, &$data, $rcObj ) );
 608                 if ( !$success ) {
 609                         // skip entry if hook aborted it
 610                         return '';
 611                 }
 612
 613                 $line = Html::openElement( 'table', array( 'class' => $classes ) ) .
 614                         Html::openElement( 'tr' );
 615                 $line .= '<td class="mw-enhanced-rc"><span class="mw-enhancedchanges-arrow-space"></span>';
 616
 617                 if ( isset( $data['recentChangesFlags'] ) ) {
 618                         $line .= $this->recentChangesFlags( $data['recentChangesFlags'] );
 619                         unset( $data['recentChangesFlags'] );
 620                 }
 621
 622                 if ( isset( $data['timestampLink'] ) ) {
 623                         $line .= '&#160;' . $data['timestampLink'];
 624                         unset( $data['timestampLink'] );
 625                 }
 626                 $line .= '&#160;</td><td>';
 627
 628                 // everything else: makes it easier for extensions to add or remove data
 629                 $line .= implode( '', $data );
 630
 631                 $line .= "</td></tr></table>\n";
 632
 633                 return $line;
 634         }
 635
 636         /**
 637          * If enhanced RC is in use, this function takes the previously cached
 638          * RC lines, arranges them, and outputs the HTML
 639          *
 640          * @return string
 641          */
 642         protected function recentChangesBlock() {
 643                 if ( count( $this->rc_cache ) == 0 ) {
 644                         return '';
 645                 }
 646
 647                 $blockOut = '';
 648                 foreach ( $this->rc_cache as $block ) {
 649                         if ( count( $block ) < 2 ) {
 650                                 $blockOut .= $this->recentChangesBlockLine( array_shift( $block ) );
 651                         } else {
 652                                 $blockOut .= $this->recentChangesBlockGroup( $block );
 653                         }
 654                 }
 655
 656                 return '<div>' . $blockOut . '</div>';
 657         }
 658
 659         /**
 660          * Returns text for the end of RC
 661          * If enhanced RC is in use, returns pretty much all the text
 662          * @return string
 663          */
 664         public function endRecentChangesList() {
 665                 return $this->recentChangesBlock() . '</div>';
 666         }
 667 }