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