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 LogEntry $entry
  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 object $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 LogEntryBase */
  78         protected $entry;
  79
  80         /** @var int Constant for handling log_deleted */
  81         protected $audience = self::FOR_PUBLIC;
  82
  83         /** @var IContextSource Context for logging */
  84         public $context;
  85
  86         /** @var bool Whether to output user tool links */
  87         protected $linkFlood = false;
  88
  89         /**
  90          * Set to true if we are constructing a message text that is going to
  91          * be included in page history or send to IRC feed. Links are replaced
  92          * with plaintext or with [[pagename]] kind of syntax, that is parsed
  93          * by page histories and IRC feeds.
  94          * @var string
  95          */
  96         protected $plaintext = false;
  97
  98         /** @var string */
  99         protected $irctext = false;
 100
 101         protected function __construct( LogEntry $entry ) {
 102                 $this->entry = $entry;
 103                 $this->context = RequestContext::getMain();
 104         }
 105
 106         /**
 107          * Replace the default context
 108          * @param IContextSource $context
 109          */
 110         public function setContext( IContextSource $context ) {
 111                 $this->context = $context;
 112         }
 113
 114         /**
 115          * Set the visibility restrictions for displaying content.
 116          * If set to public, and an item is deleted, then it will be replaced
 117          * with a placeholder even if the context user is allowed to view it.
 118          * @param int $audience Const self::FOR_THIS_USER or self::FOR_PUBLIC
 119          */
 120         public function setAudience( $audience ) {
 121                 $this->audience = ( $audience == self::FOR_THIS_USER )
 122                         ? self::FOR_THIS_USER
 123                         : self::FOR_PUBLIC;
 124         }
 125
 126         /**
 127          * Check if a log item can be displayed
 128          * @param int $field LogPage::DELETED_* constant
 129          * @return bool
 130          */
 131         protected function canView( $field ) {
 132                 if ( $this->audience == self::FOR_THIS_USER ) {
 133                         return LogEventsList::userCanBitfield(
 134                                 $this->entry->getDeleted(), $field, $this->context->getUser() );
 135                 } else {
 136                         return !$this->entry->isDeleted( $field );
 137                 }
 138         }
 139
 140         /**
 141          * If set to true, will produce user tool links after
 142          * the user name. This should be replaced with generic
 143          * CSS/JS solution.
 144          * @param bool $value
 145          */
 146         public function setShowUserToolLinks( $value ) {
 147                 $this->linkFlood = $value;
 148         }
 149
 150         /**
 151          * Ugly hack to produce plaintext version of the message.
 152          * Usually you also want to set extraneous request context
 153          * to avoid formatting for any particular user.
 154          * @see getActionText()
 155          * @return string Plain text
 156          */
 157         public function getPlainActionText() {
 158                 $this->plaintext = true;
 159                 $text = $this->getActionText();
 160                 $this->plaintext = false;
 161
 162                 return $text;
 163         }
 164
 165         /**
 166          * Even uglier hack to maintain backwards compatibilty with IRC bots
 167          * (bug 34508).
 168          * @see getActionText()
 169          * @return string Text
 170          */
 171         public function getIRCActionComment() {
 172                 $actionComment = $this->getIRCActionText();
 173                 $comment = $this->entry->getComment();
 174
 175                 if ( $comment != '' ) {
 176                         if ( $actionComment == '' ) {
 177                                 $actionComment = $comment;
 178                         } else {
 179                                 $actionComment .= wfMessage( 'colon-separator' )->inContentLanguage()->text() . $comment;
 180                         }
 181                 }
 182
 183                 return $actionComment;
 184         }
 185
 186         /**
 187          * Even uglier hack to maintain backwards compatibilty with IRC bots
 188          * (bug 34508).
 189          * @see getActionText()
 190          * @return string Text
 191          */
 192         public function getIRCActionText() {
 193                 $this->plaintext = true;
 194                 $this->irctext = true;
 195
 196                 $entry = $this->entry;
 197                 $parameters = $entry->getParameters();
 198                 // @see LogPage::actionText()
 199                 // Text of title the action is aimed at.
 200                 $target = $entry->getTarget()->getPrefixedText();
 201                 $text = null;
 202                 switch ( $entry->getType() ) {
 203                         case 'move':
 204                                 switch ( $entry->getSubtype() ) {
 205                                         case 'move':
 206                                                 $movesource = $parameters['4::target'];
 207                                                 $text = wfMessage( '1movedto2' )
 208                                                         ->rawParams( $target, $movesource )->inContentLanguage()->escaped();
 209                                                 break;
 210                                         case 'move_redir':
 211                                                 $movesource = $parameters['4::target'];
 212                                                 $text = wfMessage( '1movedto2_redir' )
 213                                                         ->rawParams( $target, $movesource )->inContentLanguage()->escaped();
 214                                                 break;
 215                                         case 'move-noredirect':
 216                                                 break;
 217                                         case 'move_redir-noredirect':
 218                                                 break;
 219                                 }
 220                                 break;
 221
 222                         case 'delete':
 223                                 switch ( $entry->getSubtype() ) {
 224                                         case 'delete':
 225                                                 $text = wfMessage( 'deletedarticle' )
 226                                                         ->rawParams( $target )->inContentLanguage()->escaped();
 227                                                 break;
 228                                         case 'restore':
 229                                                 $text = wfMessage( 'undeletedarticle' )
 230                                                         ->rawParams( $target )->inContentLanguage()->escaped();
 231                                                 break;
 232                                         // @codingStandardsIgnoreStart Long line
 233                                         //case 'revision': // Revision deletion
 234                                         //case 'event': // Log deletion
 235                                         // see https://svn.wikimedia.org/viewvc/mediawiki/trunk/phase3/includes/LogPage.php?&pathrev=97044&r1=97043&r2=97044
 236                                         //default:
 237                                         // @codingStandardsIgnoreEnd
 238                                 }
 239                                 break;
 240
 241                         case 'patrol':
 242                                 // @codingStandardsIgnoreStart Long line
 243                                 // https://svn.wikimedia.org/viewvc/mediawiki/trunk/phase3/includes/PatrolLog.php?&pathrev=97495&r1=97494&r2=97495
 244                                 // @codingStandardsIgnoreEnd
 245                                 // Create a diff link to the patrolled revision
 246                                 if ( $entry->getSubtype() === 'patrol' ) {
 247                                         $diffLink = htmlspecialchars(
 248                                                 wfMessage( 'patrol-log-diff', $parameters['4::curid'] )
 249                                                         ->inContentLanguage()->text() );
 250                                         $text = wfMessage( 'patrol-log-line', $diffLink, "[[$target]]", "" )
 251                                                 ->inContentLanguage()->text();
 252                                 } else {
 253                                         // broken??
 254                                 }
 255                                 break;
 256
 257                         case 'protect':
 258                                 switch ( $entry->getSubtype() ) {
 259                                         case 'protect':
 260                                                 $text = wfMessage( 'protectedarticle' )
 261                                                         ->rawParams( $target . ' ' . $parameters[0] )->inContentLanguage()->escaped();
 262                                                 break;
 263                                         case 'unprotect':
 264                                                 $text = wfMessage( 'unprotectedarticle' )
 265                                                         ->rawParams( $target )->inContentLanguage()->escaped();
 266                                                 break;
 267                                         case 'modify':
 268                                                 $text = wfMessage( 'modifiedarticleprotection' )
 269                                                         ->rawParams( $target . ' ' . $parameters[0] )->inContentLanguage()->escaped();
 270                                                 break;
 271                                 }
 272                                 break;
 273
 274                         case 'newusers':
 275                                 switch ( $entry->getSubtype() ) {
 276                                         case 'newusers':
 277                                         case 'create':
 278                                                 $text = wfMessage( 'newuserlog-create-entry' )
 279                                                         ->inContentLanguage()->escaped();
 280                                                 break;
 281                                         case 'create2':
 282                                         case 'byemail':
 283                                                 $text = wfMessage( 'newuserlog-create2-entry' )
 284                                                         ->rawParams( $target )->inContentLanguage()->escaped();
 285                                                 break;
 286                                         case 'autocreate':
 287                                                 $text = wfMessage( 'newuserlog-autocreate-entry' )
 288                                                         ->inContentLanguage()->escaped();
 289                                                 break;
 290                                 }
 291                                 break;
 292
 293                         case 'upload':
 294                                 switch ( $entry->getSubtype() ) {
 295                                         case 'upload':
 296                                                 $text = wfMessage( 'uploadedimage' )
 297                                                         ->rawParams( $target )->inContentLanguage()->escaped();
 298                                                 break;
 299                                         case 'overwrite':
 300                                                 $text = wfMessage( 'overwroteimage' )
 301                                                         ->rawParams( $target )->inContentLanguage()->escaped();
 302                                                 break;
 303                                 }
 304                                 break;
 305
 306                         case 'rights':
 307                                 if ( count( $parameters['4::oldgroups'] ) ) {
 308                                         $oldgroups = implode( ', ', $parameters['4::oldgroups'] );
 309                                 } else {
 310                                         $oldgroups = wfMessage( 'rightsnone' )->inContentLanguage()->escaped();
 311                                 }
 312                                 if ( count( $parameters['5::newgroups'] ) ) {
 313                                         $newgroups = implode( ', ', $parameters['5::newgroups'] );
 314                                 } else {
 315                                         $newgroups = wfMessage( 'rightsnone' )->inContentLanguage()->escaped();
 316                                 }
 317                                 switch ( $entry->getSubtype() ) {
 318                                         case 'rights':
 319                                                 $text = wfMessage( 'rightslogentry' )
 320                                                         ->rawParams( $target, $oldgroups, $newgroups )->inContentLanguage()->escaped();
 321                                                 break;
 322                                         case 'autopromote':
 323                                                 $text = wfMessage( 'rightslogentry-autopromote' )
 324                                                         ->rawParams( $target, $oldgroups, $newgroups )->inContentLanguage()->escaped();
 325                                                 break;
 326                                 }
 327                                 break;
 328
 329                         case 'merge':
 330                                 $text = wfMessage( 'pagemerge-logentry' )
 331                                         ->rawParams( $target, $parameters['4::dest'], $parameters['5::mergepoint'] )
 332                                         ->inContentLanguage()->escaped();
 333                                 break;
 334
 335                         case 'block':
 336                                 switch ( $entry->getSubtype() ) {
 337                                         case 'block':
 338                                                 global $wgContLang;
 339                                                 $duration = $wgContLang->translateBlockExpiry( $parameters['5::duration'] );
 340                                                 $flags = BlockLogFormatter::formatBlockFlags( $parameters['6::flags'], $wgContLang );
 341                                                 $text = wfMessage( 'blocklogentry' )
 342                                                         ->rawParams( $target, $duration, $flags )->inContentLanguage()->escaped();
 343                                                 break;
 344                                         case 'unblock':
 345                                                 $text = wfMessage( 'unblocklogentry' )
 346                                                         ->rawParams( $target )->inContentLanguage()->escaped();
 347                                                 break;
 348                                         case 'reblock':
 349                                                 global $wgContLang;
 350                                                 $duration = $wgContLang->translateBlockExpiry( $parameters['5::duration'] );
 351                                                 $flags = BlockLogFormatter::formatBlockFlags( $parameters['6::flags'], $wgContLang );
 352                                                 $text = wfMessage( 'reblock-logentry' )
 353                                                         ->rawParams( $target, $duration, $flags )->inContentLanguage()->escaped();
 354                                                 break;
 355                                 }
 356                                 break;
 357                         // case 'suppress' --private log -- aaron  (so we know who to blame in a few years :-D)
 358                         // default:
 359                 }
 360                 if ( is_null( $text ) ) {
 361                         $text = $this->getPlainActionText();
 362                 }
 363
 364                 $this->plaintext = false;
 365                 $this->irctext = false;
 366
 367                 return $text;
 368         }
 369
 370         /**
 371          * Gets the log action, including username.
 372          * @return string HTML
 373          */
 374         public function getActionText() {
 375                 if ( $this->canView( LogPage::DELETED_ACTION ) ) {
 376                         $element = $this->getActionMessage();
 377                         if ( $element instanceof Message ) {
 378                                 $element = $this->plaintext ? $element->text() : $element->escaped();
 379                         }
 380                         if ( $this->entry->isDeleted( LogPage::DELETED_ACTION ) ) {
 381                                 $element = $this->styleRestricedElement( $element );
 382                         }
 383                 } else {
 384                         $sep = $this->msg( 'word-separator' );
 385                         $sep = $this->plaintext ? $sep->text() : $sep->escaped();
 386                         $performer = $this->getPerformerElement();
 387                         $element = $performer . $sep . $this->getRestrictedElement( 'rev-deleted-event' );
 388                 }
 389
 390                 return $element;
 391         }
 392
 393         /**
 394          * Returns a sentence describing the log action. Usually
 395          * a Message object is returned, but old style log types
 396          * and entries might return pre-escaped HTML string.
 397          * @return Message|string Pre-escaped HTML
 398          */
 399         protected function getActionMessage() {
 400                 $message = $this->msg( $this->getMessageKey() );
 401                 $message->params( $this->getMessageParameters() );
 402
 403                 return $message;
 404         }
 405
 406         /**
 407          * Returns a key to be used for formatting the action sentence.
 408          * Default is logentry-TYPE-SUBTYPE for modern logs. Legacy log
 409          * types will use custom keys, and subclasses can also alter the
 410          * key depending on the entry itself.
 411          * @return string Message key
 412          */
 413         protected function getMessageKey() {
 414                 $type = $this->entry->getType();
 415                 $subtype = $this->entry->getSubtype();
 416
 417                 return "logentry-$type-$subtype";
 418         }
 419
 420         /**
 421          * Returns extra links that comes after the action text, like "revert", etc.
 422          *
 423          * @return string
 424          */
 425         public function getActionLinks() {
 426                 return '';
 427         }
 428
 429         /**
 430          * Extracts the optional extra parameters for use in action messages.
 431          * The array indexes start from number 3.
 432          * @return array
 433          */
 434         protected function extractParameters() {
 435                 $entry = $this->entry;
 436                 $params = array();
 437
 438                 if ( $entry->isLegacy() ) {
 439                         foreach ( $entry->getParameters() as $index => $value ) {
 440                                 $params[$index + 3] = $value;
 441                         }
 442                 }
 443
 444                 // Filter out parameters which are not in format #:foo
 445                 foreach ( $entry->getParameters() as $key => $value ) {
 446                         if ( strpos( $key, ':' ) === false ) {
 447                                 continue;
 448                         }
 449                         list( $index, $type, ) = explode( ':', $key, 3 );
 450                         $params[$index - 1] = $this->formatParameterValue( $type, $value );
 451                 }
 452
 453                 /* Message class doesn't like non consecutive numbering.
 454                  * Fill in missing indexes with empty strings to avoid
 455                  * incorrect renumbering.
 456                  */
 457                 if ( count( $params ) ) {
 458                         $max = max( array_keys( $params ) );
 459                         for ( $i = 4; $i < $max; $i++ ) {
 460                                 if ( !isset( $params[$i] ) ) {
 461                                         $params[$i] = '';
 462                                 }
 463                         }
 464                 }
 465
 466                 return $params;
 467         }
 468
 469         /**
 470          * Formats parameters intented for action message from
 471          * array of all parameters. There are three hardcoded
 472          * parameters (array is zero-indexed, this list not):
 473          *  - 1: user name with premade link
 474          *  - 2: usable for gender magic function
 475          *  - 3: target page with premade link
 476          * @return array
 477          */
 478         protected function getMessageParameters() {
 479                 if ( isset( $this->parsedParameters ) ) {
 480                         return $this->parsedParameters;
 481                 }
 482
 483                 $entry = $this->entry;
 484                 $params = $this->extractParameters();
 485                 $params[0] = Message::rawParam( $this->getPerformerElement() );
 486                 $params[1] = $this->canView( LogPage::DELETED_USER ) ? $entry->getPerformer()->getName() : '';
 487                 $params[2] = Message::rawParam( $this->makePageLink( $entry->getTarget() ) );
 488
 489                 // Bad things happens if the numbers are not in correct order
 490                 ksort( $params );
 491
 492                 $this->parsedParameters = $params;
 493                 return $this->parsedParameters;
 494         }
 495
 496         /**
 497          * Formats parameters values dependent to their type
 498          * @param string $type The type of the value.
 499          *   Valid are currently:
 500          *     * - (empty) or plain: The value is returned as-is
 501          *     * raw: The value will be added to the log message
 502          *            as raw parameter (e.g. no escaping)
 503          *            Use this only if there is no other working
 504          *            type like user-link or title-link
 505          *     * msg: The value is a message-key, the output is
 506          *            the message in user language
 507          *     * msg-content: The value is a message-key, the output
 508          *                    is the message in content language
 509          *     * user: The value is a user name, e.g. for GENDER
 510          *     * user-link: The value is a user name, returns a
 511          *                  link for the user
 512          *     * title: The value is a page title,
 513          *              returns name of page
 514          *     * title-link: The value is a page title,
 515          *                   returns link to this page
 516          *     * number: Format value as number
 517          * @param string $value The parameter value that should
 518          *                      be formated
 519          * @return string|array Formated value
 520          * @since 1.21
 521          */
 522         protected function formatParameterValue( $type, $value ) {
 523                 $saveLinkFlood = $this->linkFlood;
 524
 525                 switch ( strtolower( trim( $type ) ) ) {
 526                         case 'raw':
 527                                 $value = Message::rawParam( $value );
 528                                 break;
 529                         case 'msg':
 530                                 $value = $this->msg( $value )->text();
 531                                 break;
 532                         case 'msg-content':
 533                                 $value = $this->msg( $value )->inContentLanguage()->text();
 534                                 break;
 535                         case 'number':
 536                                 $value = Message::numParam( $value );
 537                                 break;
 538                         case 'user':
 539                                 $user = User::newFromName( $value );
 540                                 $value = $user->getName();
 541                                 break;
 542                         case 'user-link':
 543                                 $this->setShowUserToolLinks( false );
 544
 545                                 $user = User::newFromName( $value );
 546                                 $value = Message::rawParam( $this->makeUserLink( $user ) );
 547
 548                                 $this->setShowUserToolLinks( $saveLinkFlood );
 549                                 break;
 550                         case 'title':
 551                                 $title = Title::newFromText( $value );
 552                                 $value = $title->getPrefixedText();
 553                                 break;
 554                         case 'title-link':
 555                                 $title = Title::newFromText( $value );
 556                                 $value = Message::rawParam( $this->makePageLink( $title ) );
 557                                 break;
 558                         case 'plain':
 559                                 // Plain text, nothing to do
 560                         default:
 561                                 // Catch other types and use the old behavior (return as-is)
 562                 }
 563
 564                 return $value;
 565         }
 566
 567         /**
 568          * Helper to make a link to the page, taking the plaintext
 569          * value in consideration.
 570          * @param Title $title The page
 571          * @param array $parameters Query parameters
 572          * @throws MWException
 573          * @return string
 574          */
 575         protected function makePageLink( Title $title = null, $parameters = array() ) {
 576                 if ( !$this->plaintext ) {
 577                         $link = Linker::link( $title, null, array(), $parameters );
 578                 } else {
 579                         if ( !$title instanceof Title ) {
 580                                 throw new MWException( "Expected title, got null" );
 581                         }
 582                         $link = '[[' . $title->getPrefixedText() . ']]';
 583                 }
 584
 585                 return $link;
 586         }
 587
 588         /**
 589          * Provides the name of the user who performed the log action.
 590          * Used as part of log action message or standalone, depending
 591          * which parts of the log entry has been hidden.
 592          * @return string
 593          */
 594         public function getPerformerElement() {
 595                 if ( $this->canView( LogPage::DELETED_USER ) ) {
 596                         $performer = $this->entry->getPerformer();
 597                         $element = $this->makeUserLink( $performer );
 598                         if ( $this->entry->isDeleted( LogPage::DELETED_USER ) ) {
 599                                 $element = $this->styleRestricedElement( $element );
 600                         }
 601                 } else {
 602                         $element = $this->getRestrictedElement( 'rev-deleted-user' );
 603                 }
 604
 605                 return $element;
 606         }
 607
 608         /**
 609          * Gets the user provided comment
 610          * @return string HTML
 611          */
 612         public function getComment() {
 613                 if ( $this->canView( LogPage::DELETED_COMMENT ) ) {
 614                         $comment = Linker::commentBlock( $this->entry->getComment() );
 615                         // No hard coded spaces thanx
 616                         $element = ltrim( $comment );
 617                         if ( $this->entry->isDeleted( LogPage::DELETED_COMMENT ) ) {
 618                                 $element = $this->styleRestricedElement( $element );
 619                         }
 620                 } else {
 621                         $element = $this->getRestrictedElement( 'rev-deleted-comment' );
 622                 }
 623
 624                 return $element;
 625         }
 626
 627         /**
 628          * Helper method for displaying restricted element.
 629          * @param string $message
 630          * @return string HTML or wiki text
 631          */
 632         protected function getRestrictedElement( $message ) {
 633                 if ( $this->plaintext ) {
 634                         return $this->msg( $message )->text();
 635                 }
 636
 637                 $content = $this->msg( $message )->escaped();
 638                 $attribs = array( 'class' => 'history-deleted' );
 639
 640                 return Html::rawElement( 'span', $attribs, $content );
 641         }
 642
 643         /**
 644          * Helper method for styling restricted element.
 645          * @param string $content
 646          * @return string HTML or wiki text
 647          */
 648         protected function styleRestricedElement( $content ) {
 649                 if ( $this->plaintext ) {
 650                         return $content;
 651                 }
 652                 $attribs = array( 'class' => 'history-deleted' );
 653
 654                 return Html::rawElement( 'span', $attribs, $content );
 655         }
 656
 657         /**
 658          * Shortcut for wfMessage which honors local context.
 659          * @param string $key
 660          * @return Message
 661          */
 662         protected function msg( $key ) {
 663                 return $this->context->msg( $key );
 664         }
 665
 666         protected function makeUserLink( User $user, $toolFlags = 0 ) {
 667                 if ( $this->plaintext ) {
 668                         $element = $user->getName();
 669                 } else {
 670                         $element = Linker::userLink(
 671                                 $user->getId(),
 672                                 $user->getName()
 673                         );
 674
 675                         if ( $this->linkFlood ) {
 676                                 $element .= Linker::userToolLinks(
 677                                         $user->getId(),
 678                                         $user->getName(),
 679                                         true, // redContribsWhenNoEdits
 680                                         $toolFlags,
 681                                         $user->getEditCount()
 682                                 );
 683                         }
 684                 }
 685
 686                 return $element;
 687         }
 688
 689         /**
 690          * @return array Array of titles that should be preloaded with LinkBatch
 691          */
 692         public function getPreloadTitles() {
 693                 return array();
 694         }
 695
 696         /**
 697          * @return array Output of getMessageParameters() for testing
 698          */
 699         public function getMessageParametersForTesting() {
 700                 // This function was added because getMessageParameters() is
 701                 // protected and a change from protected to public caused
 702                 // problems with extensions
 703                 return $this->getMessageParameters();
 704         }
 705 }
 706
 707 /**
 708  * This class formats all log entries for log types
 709  * which have not been converted to the new system.
 710  * This is not about old log entries which store
 711  * parameters in a different format - the new
 712  * LogFormatter classes have code to support formatting
 713  * those too.
 714  * @since 1.19
 715  */
 716 class LegacyLogFormatter extends LogFormatter {
 717         /**
 718          * Backward compatibility for extension changing the comment from
 719          * the LogLine hook. This will be set by the first call on getComment(),
 720          * then it might be modified by the hook when calling getActionLinks(),
 721          * so that the modified value will be returned when calling getComment()
 722          * a second time.
 723          *
 724          * @var string|null
 725          */
 726         private $comment = null;
 727
 728         /**
 729          * Cache for the result of getActionLinks() so that it does not need to
 730          * run multiple times depending on the order that getComment() and
 731          * getActionLinks() are called.
 732          *
 733          * @var string|null
 734          */
 735         private $revert = null;
 736
 737         public function getComment() {
 738                 if ( $this->comment === null ) {
 739                         $this->comment = parent::getComment();
 740                 }
 741
 742                 // Make sure we execute the LogLine hook so that we immediately return
 743                 // the correct value.
 744                 if ( $this->revert === null ) {
 745                         $this->getActionLinks();
 746                 }
 747
 748                 return $this->comment;
 749         }
 750
 751         protected function getActionMessage() {
 752                 $entry = $this->entry;
 753                 $action = LogPage::actionText(
 754                         $entry->getType(),
 755                         $entry->getSubtype(),
 756                         $entry->getTarget(),
 757                         $this->plaintext ? null : $this->context->getSkin(),
 758                         (array)$entry->getParameters(),
 759                         !$this->plaintext // whether to filter [[]] links
 760                 );
 761
 762                 $performer = $this->getPerformerElement();
 763                 if ( !$this->irctext ) {
 764                         $sep = $this->msg( 'word-separator' );
 765                         $sep = $this->plaintext ? $sep->text() : $sep->escaped();
 766                         $action = $performer . $sep . $action;
 767                 }
 768
 769                 return $action;
 770         }
 771
 772         public function getActionLinks() {
 773                 if ( $this->revert !== null ) {
 774                         return $this->revert;
 775                 }
 776
 777                 if ( $this->entry->isDeleted( LogPage::DELETED_ACTION ) ) {
 778                         $this->revert = '';
 779                         return $this->revert;
 780                 }
 781
 782                 $title = $this->entry->getTarget();
 783                 $type = $this->entry->getType();
 784                 $subtype = $this->entry->getSubtype();
 785
 786                 if ( $type == 'protect'
 787                         && ( $subtype == 'protect' || $subtype == 'modify' || $subtype == 'unprotect' )
 788                 ) {
 789                         $links = array(
 790                                 Linker::link( $title,
 791                                         $this->msg( 'hist' )->escaped(),
 792                                         array(),
 793                                         array(
 794                                                 'action' => 'history',
 795                                                 'offset' => $this->entry->getTimestamp()
 796                                         )
 797                                 )
 798                         );
 799                         if ( $this->context->getUser()->isAllowed( 'protect' ) ) {
 800                                 $links[] = Linker::linkKnown(
 801                                         $title,
 802                                         $this->msg( 'protect_change' )->escaped(),
 803                                         array(),
 804                                         array( 'action' => 'protect' )
 805                                 );
 806                         }
 807
 808                         return $this->msg( 'parentheses' )->rawParams(
 809                                 $this->context->getLanguage()->pipeList( $links ) )->escaped();
 810                 }
 811
 812                 // Do nothing. The implementation is handled by the hook modifiying the
 813                 // passed-by-ref parameters. This also changes the default value so that
 814                 // getComment() and getActionLinks() do not call them indefinitely.
 815                 $this->revert = '';
 816
 817                 // This is to populate the $comment member of this instance so that it
 818                 // can be modified when calling the hook just below.
 819                 if ( $this->comment === null ) {
 820                         $this->getComment();
 821                 }
 822
 823                 $params = $this->entry->getParameters();
 824
 825                 Hooks::run( 'LogLine', array( $type, $subtype, $title, $params,
 826                         &$this->comment, &$this->revert, $this->entry->getTimestamp() ) );
 827
 828                 return $this->revert;
 829         }
 830 }