includes/logging/LogFormatter.php

   1 <?php
   2 /**
   3  * Contains classes for formatting log entries
   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  * @author Niklas Laxström
  22  * @license http://www.gnu.org/copyleft/gpl.html GNU General Public License 2.0 or later
  23  * @since 1.19
  24  */
  25
  26 /**
  27  * Implements the default log formatting.
  28  * Can be overridden by subclassing and setting
  29  * $wgLogActionsHandlers['type/subtype'] = 'class'; or
  30  * $wgLogActionsHandlers['type/*'] = 'class';
  31  * @since 1.19
  32  */
  33 class LogFormatter {
  34         // Audience options for viewing usernames, comments, and actions
  35         const FOR_PUBLIC = 1;
  36         const FOR_THIS_USER = 2;
  37
  38         // Static->
  39
  40         /**
  41          * Constructs a new formatter suitable for given entry.
  42          * @param $entry LogEntry
  43          * @return LogFormatter
  44          */
  45         public static function newFromEntry( LogEntry $entry ) {
  46                 global $wgLogActionsHandlers;
  47                 $fulltype = $entry->getFullType();
  48                 $wildcard = $entry->getType() . '/*';
  49                 $handler = '';
  50
  51                 if ( isset( $wgLogActionsHandlers[$fulltype] ) ) {
  52                         $handler = $wgLogActionsHandlers[$fulltype];
  53                 } elseif ( isset( $wgLogActionsHandlers[$wildcard] ) ) {
  54                         $handler = $wgLogActionsHandlers[$wildcard];
  55                 }
  56
  57                 if ( $handler !== '' && is_string( $handler ) && class_exists( $handler ) ) {
  58                         return new $handler( $entry );
  59                 }
  60
  61                 return new LegacyLogFormatter( $entry );
  62         }
  63
  64         /**
  65          * Handy shortcut for constructing a formatter directly from
  66          * database row.
  67          * @param $row
  68          * @see DatabaseLogEntry::getSelectQueryData
  69          * @return LogFormatter
  70          */
  71         public static function newFromRow( $row ) {
  72                 return self::newFromEntry( DatabaseLogEntry::newFromRow( $row ) );
  73         }
  74
  75         // Nonstatic->
  76
  77         /// @var LogEntry
  78         protected $entry;
  79
  80         /// Integer constant for handling log_deleted
  81         protected $audience = self::FOR_PUBLIC;
  82
  83         /// Whether to output user tool links
  84         protected $linkFlood = false;
  85
  86         /**
  87          * Set to true if we are constructing a message text that is going to
  88          * be included in page history or send to IRC feed. Links are replaced
  89          * with plaintext or with [[pagename]] kind of syntax, that is parsed
  90          * by page histories and IRC feeds.
  91          * @var boolean
  92          */
  93         protected $plaintext = false;
  94
  95         protected $irctext = false;
  96
  97         protected function __construct( LogEntry $entry ) {
  98                 $this->entry = $entry;
  99                 $this->context = RequestContext::getMain();
 100         }
 101
 102         /**
 103          * Replace the default context
 104          * @param $context IContextSource
 105          */
 106         public function setContext( IContextSource $context ) {
 107                 $this->context = $context;
 108         }
 109
 110         /**
 111          * Set the visibility restrictions for displaying content.
 112          * If set to public, and an item is deleted, then it will be replaced
 113          * with a placeholder even if the context user is allowed to view it.
 114          * @param $audience integer self::FOR_THIS_USER or self::FOR_PUBLIC
 115          */
 116         public function setAudience( $audience ) {
 117                 $this->audience = ( $audience == self::FOR_THIS_USER )
 118                         ? self::FOR_THIS_USER
 119                         : self::FOR_PUBLIC;
 120         }
 121
 122         /**
 123          * Check if a log item can be displayed
 124          * @param $field integer LogPage::DELETED_* constant
 125          * @return bool
 126          */
 127         protected function canView( $field ) {
 128                 if ( $this->audience == self::FOR_THIS_USER ) {
 129                         return LogEventsList::userCanBitfield(
 130                                 $this->entry->getDeleted(), $field, $this->context->getUser() );
 131                 } else {
 132                         return !$this->entry->isDeleted( $field );
 133                 }
 134         }
 135
 136         /**
 137          * If set to true, will produce user tool links after
 138          * the user name. This should be replaced with generic
 139          * CSS/JS solution.
 140          * @param $value boolean
 141          */
 142         public function setShowUserToolLinks( $value ) {
 143                 $this->linkFlood = $value;
 144         }
 145
 146         /**
 147          * Ugly hack to produce plaintext version of the message.
 148          * Usually you also want to set extraneous request context
 149          * to avoid formatting for any particular user.
 150          * @see getActionText()
 151          * @return string text
 152          */
 153         public function getPlainActionText() {
 154                 $this->plaintext = true;
 155                 $text = $this->getActionText();
 156                 $this->plaintext = false;
 157                 return $text;
 158         }
 159
 160         /**
 161          * Even uglier hack to maintain backwards compatibilty with IRC bots
 162          * (bug 34508).
 163          * @see getActionText()
 164          * @return string text
 165          */
 166         public function getIRCActionComment() {
 167                 $actionComment = $this->getIRCActionText();
 168                 $comment = $this->entry->getComment();
 169
 170                 if ( $comment != '' ) {
 171                         if ( $actionComment == '' ) {
 172                                 $actionComment = $comment;
 173                         } else {
 174                                 $actionComment .= wfMsgForContent( 'colon-separator' ) . $comment;
 175                         }
 176                 }
 177
 178                 return $actionComment;
 179         }
 180
 181         /**
 182          * Even uglier hack to maintain backwards compatibilty with IRC bots
 183          * (bug 34508).
 184          * @see getActionText()
 185          * @return string text
 186          */
 187         public function getIRCActionText() {
 188                 $this->plaintext = true;
 189                 $this->irctext = true;
 190                 $text = $this->getActionText();
 191
 192                 $entry = $this->entry;
 193                 $parameters = $entry->getParameters();
 194                 // @see LogPage::actionText()
 195                 $msgOpts = array( 'parsemag', 'escape', 'replaceafter', 'content' );
 196                 // Text of title the action is aimed at.
 197                 $target = $entry->getTarget()->getPrefixedText() ;
 198                 $text = null;
 199                 switch( $entry->getType() ) {
 200                         case 'move':
 201                                 switch( $entry->getSubtype() ) {
 202                                         case 'move':
 203                                                 $movesource =  $parameters['4::target'];
 204                                                 $text = wfMsgExt( '1movedto2', $msgOpts, $target, $movesource );
 205                                                 break;
 206                                         case 'move_redir':
 207                                                 $movesource =  $parameters['4::target'];
 208                                                 $text = wfMsgExt( '1movedto2_redir', $msgOpts, $target, $movesource );
 209                                                 break;
 210                                         case 'move-noredirect':
 211                                                 break;
 212                                         case 'move_redir-noredirect':
 213                                                 break;
 214                                 }
 215                                 break;
 216
 217                         case 'delete':
 218                                 switch( $entry->getSubtype() ) {
 219                                         case 'delete':
 220                                                 $text = wfMsgExt( 'deletedarticle', $msgOpts, $target );
 221                                                 break;
 222                                         case 'restore':
 223                                                 $text = wfMsgExt( 'undeletedarticle', $msgOpts, $target );
 224                                                 break;
 225                                         //case 'revision': // Revision deletion
 226                                         //case 'event': // Log deletion
 227                                                 // see https://svn.wikimedia.org/viewvc/mediawiki/trunk/phase3/includes/LogPage.php?&pathrev=97044&r1=97043&r2=97044
 228                                         //default:
 229                                 }
 230                                 break;
 231
 232                         case 'patrol':
 233                                 // https://svn.wikimedia.org/viewvc/mediawiki/trunk/phase3/includes/PatrolLog.php?&pathrev=97495&r1=97494&r2=97495
 234                                 // Create a diff link to the patrolled revision
 235                                 if ( $entry->getSubtype() === 'patrol' ) {
 236                                         $diffLink = htmlspecialchars(
 237                                                 wfMsgForContent( 'patrol-log-diff', $parameters['4::curid'] ) );
 238                                         $text = wfMsgForContent( 'patrol-log-line', $diffLink, "[[$target]]", "" );
 239                                 } else {
 240                                         // broken??
 241                                 }
 242                                 break;
 243
 244                         case 'protect':
 245                                 switch( $entry->getSubtype() ) {
 246                                 case 'protect':
 247                                         $text = wfMsgExt( 'protectedarticle', $msgOpts, $target . ' ' . $parameters[0] );
 248                                                 break;
 249                                 case 'unprotect':
 250                                         $text = wfMsgExt( 'unprotectedarticle', $msgOpts, $target );
 251                                                 break;
 252                                 case 'modify':
 253                                         $text = wfMsgExt( 'modifiedarticleprotection', $msgOpts, $target . ' ' . $parameters[0] );
 254                                                 break;
 255                                 }
 256                                 break;
 257
 258                         case 'newusers':
 259                                 switch( $entry->getSubtype() ) {
 260                                         case 'newusers':
 261                                         case 'create':
 262                                                 $text = wfMsgExt( 'newuserlog-create-entry', $msgOpts /* no params */ );
 263                                                 break;
 264                                         case 'create2':
 265                                                 $text = wfMsgExt( 'newuserlog-create2-entry', $msgOpts, $target );
 266                                                 break;
 267                                         case 'autocreate':
 268                                                 $text = wfMsgExt( 'newuserlog-autocreate-entry', $msgOpts /* no params */ );
 269                                                 break;
 270                                 }
 271                                 break;
 272
 273                         case 'upload':
 274                                 switch( $entry->getSubtype() ) {
 275                                         case 'upload':
 276                                                 $text = wfMsgExt( 'uploadedimage', $msgOpts, $target );
 277                                                 break;
 278                                         case 'overwrite':
 279                                                 $text = wfMsgExt( 'overwroteimage', $msgOpts, $target );
 280                                                 break;
 281                                 }
 282                                 break;
 283
 284
 285                         // case 'suppress' --private log -- aaron  (sign your messages so we know who to blame in a few years :-D)
 286                         // default:
 287                 }
 288                 if( is_null( $text ) ) {
 289                         $text = $this->getPlainActionText();
 290                 }
 291
 292                 $this->plaintext = false;
 293                 $this->irctext = false;
 294                 return $text;
 295         }
 296
 297         /**
 298          * Gets the log action, including username.
 299          * @return string HTML
 300          */
 301         public function getActionText() {
 302                 if ( $this->canView( LogPage::DELETED_ACTION ) ) {
 303                         $element = $this->getActionMessage();
 304                         if ( $element instanceof Message ) {
 305                                 $element = $this->plaintext ? $element->text() : $element->escaped();
 306                         }
 307                         if ( $this->entry->isDeleted( LogPage::DELETED_ACTION ) ) {
 308                                 $element = $this->styleRestricedElement( $element );
 309                         }
 310                 } else {
 311                         $performer = $this->getPerformerElement() . $this->msg( 'word-separator' )->text();
 312                         $element = $performer . $this->getRestrictedElement( 'rev-deleted-event' );
 313                 }
 314
 315                 return $element;
 316         }
 317
 318         /**
 319          * Returns a sentence describing the log action. Usually
 320          * a Message object is returned, but old style log types
 321          * and entries might return pre-escaped html string.
 322          * @return Message|string pre-escaped html
 323          */
 324         protected function getActionMessage() {
 325                 $message = $this->msg( $this->getMessageKey() );
 326                 $message->params( $this->getMessageParameters() );
 327                 return $message;
 328         }
 329
 330         /**
 331          * Returns a key to be used for formatting the action sentence.
 332          * Default is logentry-TYPE-SUBTYPE for modern logs. Legacy log
 333          * types will use custom keys, and subclasses can also alter the
 334          * key depending on the entry itself.
 335          * @return string message key
 336          */
 337         protected function getMessageKey() {
 338                 $type = $this->entry->getType();
 339                 $subtype = $this->entry->getSubtype();
 340
 341                 return "logentry-$type-$subtype";
 342         }
 343
 344         /**
 345          * Extracts the optional extra parameters for use in action messages.
 346          * The array indexes start from number 3.
 347          * @return array
 348          */
 349         protected function extractParameters() {
 350                 $entry = $this->entry;
 351                 $params = array();
 352
 353                 if ( $entry->isLegacy() ) {
 354                         foreach ( $entry->getParameters() as $index => $value ) {
 355                                 $params[$index + 3] = $value;
 356                         }
 357                 }
 358
 359                 // Filter out parameters which are not in format #:foo
 360                 foreach ( $entry->getParameters() as $key => $value ) {
 361                         if ( strpos( $key, ':' ) === false ) continue;
 362                         list( $index, $type, $name ) = explode( ':', $key, 3 );
 363                         $params[$index - 1] = $value;
 364                 }
 365
 366                 /* Message class doesn't like non consecutive numbering.
 367                  * Fill in missing indexes with empty strings to avoid
 368                  * incorrect renumbering.
 369                  */
 370                 if ( count( $params ) ) {
 371                         $max = max( array_keys( $params ) );
 372                         for ( $i = 4; $i < $max; $i++ ) {
 373                                 if ( !isset( $params[$i] ) ) {
 374                                         $params[$i] = '';
 375                                 }
 376                         }
 377                 }
 378                 return $params;
 379         }
 380
 381         /**
 382          * Formats parameters intented for action message from
 383          * array of all parameters. There are three hardcoded
 384          * parameters (array is zero-indexed, this list not):
 385          *  - 1: user name with premade link
 386          *  - 2: usable for gender magic function
 387          *  - 3: target page with premade link
 388          * @return array
 389          */
 390         protected function getMessageParameters() {
 391                 if ( isset( $this->parsedParameters ) ) {
 392                         return $this->parsedParameters;
 393                 }
 394
 395                 $entry = $this->entry;
 396                 $params = $this->extractParameters();
 397                 $params[0] = Message::rawParam( $this->getPerformerElement() );
 398                 $params[1] = $entry->getPerformer()->getName();
 399                 $params[2] = Message::rawParam( $this->makePageLink( $entry->getTarget() ) );
 400
 401                 // Bad things happens if the numbers are not in correct order
 402                 ksort( $params );
 403                 return $this->parsedParameters = $params;
 404         }
 405
 406         /**
 407          * Helper to make a link to the page, taking the plaintext
 408          * value in consideration.
 409          * @param $title Title the page
 410          * @param $parameters array query parameters
 411          * @return String
 412          */
 413         protected function makePageLink( Title $title = null, $parameters = array() ) {
 414                 if ( !$this->plaintext ) {
 415                         $link = Linker::link( $title, null, array(), $parameters );
 416                 } else {
 417                         if ( !$title instanceof Title ) {
 418                                 throw new MWException( "Expected title, got null" );
 419                         }
 420                         $link = '[[' . $title->getPrefixedText() . ']]';
 421                 }
 422                 return $link;
 423         }
 424
 425         /**
 426          * Provides the name of the user who performed the log action.
 427          * Used as part of log action message or standalone, depending
 428          * which parts of the log entry has been hidden.
 429          * @return String
 430          */
 431         public function getPerformerElement() {
 432                 if ( $this->canView( LogPage::DELETED_USER ) ) {
 433                         $performer = $this->entry->getPerformer();
 434                         $element = $this->makeUserLink( $performer );
 435                         if ( $this->entry->isDeleted( LogPage::DELETED_USER ) ) {
 436                                 $element = $this->styleRestricedElement( $element );
 437                         }
 438                 } else {
 439                         $element = $this->getRestrictedElement( 'rev-deleted-user' );
 440                 }
 441
 442                 return $element;
 443         }
 444
 445         /**
 446          * Gets the luser provided comment
 447          * @return string HTML
 448          */
 449         public function getComment() {
 450                 if ( $this->canView( LogPage::DELETED_COMMENT ) ) {
 451                         $comment = Linker::commentBlock( $this->entry->getComment() );
 452                         // No hard coded spaces thanx
 453                         $element = ltrim( $comment );
 454                         if ( $this->entry->isDeleted( LogPage::DELETED_COMMENT ) ) {
 455                                 $element = $this->styleRestricedElement( $element );
 456                         }
 457                 } else {
 458                         $element = $this->getRestrictedElement( 'rev-deleted-comment' );
 459                 }
 460
 461                 return $element;
 462         }
 463
 464         /**
 465          * Helper method for displaying restricted element.
 466          * @param $message string
 467          * @return string HTML or wikitext
 468          */
 469         protected function getRestrictedElement( $message ) {
 470                 if ( $this->plaintext ) {
 471                         return $this->msg( $message )->text();
 472                 }
 473
 474                 $content =  $this->msg( $message )->escaped();
 475                 $attribs = array( 'class' => 'history-deleted' );
 476                 return Html::rawElement( 'span', $attribs, $content );
 477         }
 478
 479         /**
 480          * Helper method for styling restricted element.
 481          * @param $content string
 482          * @return string HTML or wikitext
 483          */
 484         protected function styleRestricedElement( $content ) {
 485                 if ( $this->plaintext ) {
 486                         return $content;
 487                 }
 488                 $attribs = array( 'class' => 'history-deleted' );
 489                 return Html::rawElement( 'span', $attribs, $content );
 490         }
 491
 492         /**
 493          * Shortcut for wfMessage which honors local context.
 494          * @todo Would it be better to require replacing the global context instead?
 495          * @param $key string
 496          * @return Message
 497          */
 498         protected function msg( $key ) {
 499                 return $this->context->msg( $key );
 500         }
 501
 502         protected function makeUserLink( User $user ) {
 503                 if ( $this->plaintext ) {
 504                         $element = $user->getName();
 505                 } else {
 506                         $element = Linker::userLink(
 507                                 $user->getId(),
 508                                 $user->getName()
 509                         );
 510
 511                         if ( $this->linkFlood ) {
 512                                 $element .= Linker::userToolLinksRedContribs(
 513                                         $user->getId(),
 514                                         $user->getName(),
 515                                         $user->getEditCount()
 516                                 );
 517                         }
 518                 }
 519                 return $element;
 520         }
 521
 522         /**
 523          * @return Array of titles that should be preloaded with LinkBatch.
 524          */
 525         public function getPreloadTitles() {
 526                 return array();
 527         }
 528
 529 }
 530
 531 /**
 532  * This class formats all log entries for log types
 533  * which have not been converted to the new system.
 534  * This is not about old log entries which store
 535  * parameters in a different format - the new
 536  * LogFormatter classes have code to support formatting
 537  * those too.
 538  * @since 1.19
 539  */
 540 class LegacyLogFormatter extends LogFormatter {
 541         protected function getActionMessage() {
 542                 $entry = $this->entry;
 543                 $action = LogPage::actionText(
 544                         $entry->getType(),
 545                         $entry->getSubtype(),
 546                         $entry->getTarget(),
 547                         $this->plaintext ? null : $this->context->getSkin(),
 548                         (array)$entry->getParameters(),
 549                         !$this->plaintext // whether to filter [[]] links
 550                 );
 551
 552                 $performer = $this->getPerformerElement();
 553                 if ( !$this->irctext ) {
 554                         $action = $performer .  $this->msg( 'word-separator' )->text() . $action;
 555                 }
 556
 557                 return $action;
 558         }
 559
 560 }
 561
 562 /**
 563  * This class formats move log entries.
 564  * @since 1.19
 565  */
 566 class MoveLogFormatter extends LogFormatter {
 567         public function getPreloadTitles() {
 568                 $params = $this->extractParameters();
 569                 return array( Title::newFromText( $params[3] ) );
 570         }
 571
 572         protected function getMessageKey() {
 573                 $key = parent::getMessageKey();
 574                 $params = $this->getMessageParameters();
 575                 if ( isset( $params[4] ) && $params[4] === '1' ) {
 576                         $key .= '-noredirect';
 577                 }
 578                 return $key;
 579         }
 580
 581         protected function getMessageParameters() {
 582                 $params = parent::getMessageParameters();
 583                 $oldname = $this->makePageLink( $this->entry->getTarget(), array( 'redirect' => 'no' ) );
 584                 $newname = $this->makePageLink( Title::newFromText( $params[3] ) );
 585                 $params[2] = Message::rawParam( $oldname );
 586                 $params[3] = Message::rawParam( $newname );
 587                 return $params;
 588         }
 589 }
 590
 591 /**
 592  * This class formats delete log entries.
 593  * @since 1.19
 594  */
 595 class DeleteLogFormatter extends LogFormatter {
 596         protected function getMessageKey() {
 597                 $key = parent::getMessageKey();
 598                 if ( in_array( $this->entry->getSubtype(), array( 'event', 'revision' ) ) ) {
 599                         if ( count( $this->getMessageParameters() ) < 5 ) {
 600                                 return "$key-legacy";
 601                         }
 602                 }
 603                 return $key;
 604         }
 605
 606         protected function getMessageParameters() {
 607                 if ( isset( $this->parsedParametersDeleteLog ) ) {
 608                         return $this->parsedParametersDeleteLog;
 609                 }
 610
 611                 $params = parent::getMessageParameters();
 612                 $subtype = $this->entry->getSubtype();
 613                 if ( in_array( $subtype, array( 'event', 'revision' ) ) ) {
 614                         if (
 615                                 ($subtype === 'event' && count( $params ) === 6 ) ||
 616                                 ($subtype === 'revision' && isset( $params[3] ) && $params[3] === 'revision' )
 617                         ) {
 618                                 $paramStart = $subtype === 'revision' ? 4 : 3;
 619
 620                                 $old = $this->parseBitField( $params[$paramStart+1] );
 621                                 $new = $this->parseBitField( $params[$paramStart+2] );
 622                                 list( $hid, $unhid, $extra ) = RevisionDeleter::getChanges( $new, $old );
 623                                 $changes = array();
 624                                 foreach ( $hid as $v ) {
 625                                         $changes[] = $this->msg( "$v-hid" )->plain();
 626                                 }
 627                                 foreach ( $unhid as $v ) {
 628                                         $changes[] = $this->msg( "$v-unhid" )->plain();
 629                                 }
 630                                 foreach ( $extra as $v ) {
 631                                         $changes[] = $this->msg( $v )->plain();
 632                                 }
 633                                 $changeText =  $this->context->getLanguage()->listToText( $changes );
 634
 635
 636                                 $newParams = array_slice( $params, 0, 3 );
 637                                 $newParams[3] = $changeText;
 638                                 $count = count( explode( ',', $params[$paramStart] ) );
 639                                 $newParams[4] = $this->context->getLanguage()->formatNum( $count );
 640                                 return $this->parsedParametersDeleteLog = $newParams;
 641                         } else {
 642                                 return $this->parsedParametersDeleteLog = array_slice( $params, 0, 3 );
 643                         }
 644                 }
 645
 646                 return $this->parsedParametersDeleteLog = $params;
 647         }
 648
 649         protected function parseBitField( $string ) {
 650                 // Input is like ofield=2134 or just the number
 651                 if ( strpos( $string, 'field=' ) === 1 ) {
 652                         list( , $field ) = explode( '=', $string );
 653                         return (int) $field;
 654                 } else {
 655                         return (int) $string;
 656                 }
 657         }
 658 }
 659
 660 /**
 661  * This class formats patrol log entries.
 662  * @since 1.19
 663  */
 664 class PatrolLogFormatter extends LogFormatter {
 665         protected function getMessageKey() {
 666                 $key = parent::getMessageKey();
 667                 $params = $this->getMessageParameters();
 668                 if ( isset( $params[5] ) && $params[5] ) {
 669                         $key .= '-auto';
 670                 }
 671                 return $key;
 672         }
 673
 674         protected function getMessageParameters() {
 675                 $params = parent::getMessageParameters();
 676
 677                 $target = $this->entry->getTarget();
 678                 $oldid = $params[3];
 679                 $revision = $this->context->getLanguage()->formatNum( $oldid, true );
 680
 681                 if ( $this->plaintext ) {
 682                         $revlink = $revision;
 683                 } elseif ( $target->exists() ) {
 684                         $query = array(
 685                                 'oldid' => $oldid,
 686                                 'diff' => 'prev'
 687                         );
 688                         $revlink = Linker::link( $target, htmlspecialchars( $revision ), array(), $query );
 689                 } else {
 690                         $revlink = htmlspecialchars( $revision );
 691                 }
 692
 693                 $params[3] = Message::rawParam( $revlink );
 694                 return $params;
 695         }
 696 }
 697
 698 /**
 699  * This class formats new user log entries.
 700  * @since 1.19
 701  */
 702 class NewUsersLogFormatter extends LogFormatter {
 703         protected function getMessageParameters() {
 704                 $params = parent::getMessageParameters();
 705                 if ( $this->entry->getSubtype() === 'create2' ) {
 706                         if ( isset( $params[3] ) ) {
 707                                 $target = User::newFromId( $params[3] );
 708                         } else {
 709                                 $target = User::newFromName( $this->entry->getTarget()->getText(), false );
 710                         }
 711                         $params[2] = Message::rawParam( $this->makeUserLink( $target ) );
 712                         $params[3] = $target->getName();
 713                 }
 714                 return $params;
 715         }
 716
 717         public function getComment() {
 718                 $timestamp = wfTimestamp( TS_MW, $this->entry->getTimestamp() );
 719                 if ( $timestamp < '20080129000000' ) {
 720                         # Suppress $comment from old entries (before 2008-01-29),
 721                         # not needed and can contain incorrect links
 722                         return '';
 723                 }
 724                 return parent::getComment();
 725         }
 726
 727         public function getPreloadTitles() {
 728                 if ( $this->entry->getSubtype() === 'create2' ) {
 729                         //add the user talk to LinkBatch for the userLink
 730                         return array( Title::makeTitle( NS_USER_TALK, $this->entry->getTarget()->getText() ) );
 731                 }
 732                 return array();
 733         }
 734 }