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                                                 // Keep compatibility with extensions by checking for
 340                                                 // new key (5::duration/6::flags) or old key (0/optional 1)
 341                                                 if ( $entry->isLegacy() ) {
 342                                                         $rawDuration = $parameters[0];
 343                                                         $rawFlags = isset( $parameters[1] ) ? $parameters[1] : '';
 344                                                 } else {
 345                                                         $rawDuration = $parameters['5::duration'];
 346                                                         $rawFlags = $parameters['6::flags'];
 347                                                 }
 348                                                 $duration = $wgContLang->translateBlockExpiry( $rawDuration );
 349                                                 $flags = BlockLogFormatter::formatBlockFlags( $rawFlags, $wgContLang );
 350                                                 $text = wfMessage( 'blocklogentry' )
 351                                                         ->rawParams( $target, $duration, $flags )->inContentLanguage()->escaped();
 352                                                 break;
 353                                         case 'unblock':
 354                                                 $text = wfMessage( 'unblocklogentry' )
 355                                                         ->rawParams( $target )->inContentLanguage()->escaped();
 356                                                 break;
 357                                         case 'reblock':
 358                                                 global $wgContLang;
 359                                                 $duration = $wgContLang->translateBlockExpiry( $parameters['5::duration'] );
 360                                                 $flags = BlockLogFormatter::formatBlockFlags( $parameters['6::flags'], $wgContLang );
 361                                                 $text = wfMessage( 'reblock-logentry' )
 362                                                         ->rawParams( $target, $duration, $flags )->inContentLanguage()->escaped();
 363                                                 break;
 364                                 }
 365                                 break;
 366                         // case 'suppress' --private log -- aaron  (so we know who to blame in a few years :-D)
 367                         // default:
 368                 }
 369                 if ( is_null( $text ) ) {
 370                         $text = $this->getPlainActionText();
 371                 }
 372
 373                 $this->plaintext = false;
 374                 $this->irctext = false;
 375
 376                 return $text;
 377         }
 378
 379         /**
 380          * Gets the log action, including username.
 381          * @return string HTML
 382          */
 383         public function getActionText() {
 384                 if ( $this->canView( LogPage::DELETED_ACTION ) ) {
 385                         $element = $this->getActionMessage();
 386                         if ( $element instanceof Message ) {
 387                                 $element = $this->plaintext ? $element->text() : $element->escaped();
 388                         }
 389                         if ( $this->entry->isDeleted( LogPage::DELETED_ACTION ) ) {
 390                                 $element = $this->styleRestricedElement( $element );
 391                         }
 392                 } else {
 393                         $sep = $this->msg( 'word-separator' );
 394                         $sep = $this->plaintext ? $sep->text() : $sep->escaped();
 395                         $performer = $this->getPerformerElement();
 396                         $element = $performer . $sep . $this->getRestrictedElement( 'rev-deleted-event' );
 397                 }
 398
 399                 return $element;
 400         }
 401
 402         /**
 403          * Returns a sentence describing the log action. Usually
 404          * a Message object is returned, but old style log types
 405          * and entries might return pre-escaped HTML string.
 406          * @return Message|string Pre-escaped HTML
 407          */
 408         protected function getActionMessage() {
 409                 $message = $this->msg( $this->getMessageKey() );
 410                 $message->params( $this->getMessageParameters() );
 411
 412                 return $message;
 413         }
 414
 415         /**
 416          * Returns a key to be used for formatting the action sentence.
 417          * Default is logentry-TYPE-SUBTYPE for modern logs. Legacy log
 418          * types will use custom keys, and subclasses can also alter the
 419          * key depending on the entry itself.
 420          * @return string Message key
 421          */
 422         protected function getMessageKey() {
 423                 $type = $this->entry->getType();
 424                 $subtype = $this->entry->getSubtype();
 425
 426                 return "logentry-$type-$subtype";
 427         }
 428
 429         /**
 430          * Returns extra links that comes after the action text, like "revert", etc.
 431          *
 432          * @return string
 433          */
 434         public function getActionLinks() {
 435                 return '';
 436         }
 437
 438         /**
 439          * Extracts the optional extra parameters for use in action messages.
 440          * The array indexes start from number 3.
 441          * @return array
 442          */
 443         protected function extractParameters() {
 444                 $entry = $this->entry;
 445                 $params = array();
 446
 447                 if ( $entry->isLegacy() ) {
 448                         foreach ( $entry->getParameters() as $index => $value ) {
 449                                 $params[$index + 3] = $value;
 450                         }
 451                 }
 452
 453                 // Filter out parameters which are not in format #:foo
 454                 foreach ( $entry->getParameters() as $key => $value ) {
 455                         if ( strpos( $key, ':' ) === false ) {
 456                                 continue;
 457                         }
 458                         list( $index, $type, ) = explode( ':', $key, 3 );
 459                         $params[$index - 1] = $this->formatParameterValue( $type, $value );
 460                 }
 461
 462                 /* Message class doesn't like non consecutive numbering.
 463                  * Fill in missing indexes with empty strings to avoid
 464                  * incorrect renumbering.
 465                  */
 466                 if ( count( $params ) ) {
 467                         $max = max( array_keys( $params ) );
 468                         // index 0 to 2 are added in getMessageParameters
 469                         for ( $i = 3; $i < $max; $i++ ) {
 470                                 if ( !isset( $params[$i] ) ) {
 471                                         $params[$i] = '';
 472                                 }
 473                         }
 474                 }
 475
 476                 return $params;
 477         }
 478
 479         /**
 480          * Formats parameters intented for action message from
 481          * array of all parameters. There are three hardcoded
 482          * parameters (array is zero-indexed, this list not):
 483          *  - 1: user name with premade link
 484          *  - 2: usable for gender magic function
 485          *  - 3: target page with premade link
 486          * @return array
 487          */
 488         protected function getMessageParameters() {
 489                 if ( isset( $this->parsedParameters ) ) {
 490                         return $this->parsedParameters;
 491                 }
 492
 493                 $entry = $this->entry;
 494                 $params = $this->extractParameters();
 495                 $params[0] = Message::rawParam( $this->getPerformerElement() );
 496                 $params[1] = $this->canView( LogPage::DELETED_USER ) ? $entry->getPerformer()->getName() : '';
 497                 $params[2] = Message::rawParam( $this->makePageLink( $entry->getTarget() ) );
 498
 499                 // Bad things happens if the numbers are not in correct order
 500                 ksort( $params );
 501
 502                 $this->parsedParameters = $params;
 503                 return $this->parsedParameters;
 504         }
 505
 506         /**
 507          * Formats parameters values dependent to their type
 508          * @param string $type The type of the value.
 509          *   Valid are currently:
 510          *     * - (empty) or plain: The value is returned as-is
 511          *     * raw: The value will be added to the log message
 512          *            as raw parameter (e.g. no escaping)
 513          *            Use this only if there is no other working
 514          *            type like user-link or title-link
 515          *     * msg: The value is a message-key, the output is
 516          *            the message in user language
 517          *     * msg-content: The value is a message-key, the output
 518          *                    is the message in content language
 519          *     * user: The value is a user name, e.g. for GENDER
 520          *     * user-link: The value is a user name, returns a
 521          *                  link for the user
 522          *     * title: The value is a page title,
 523          *              returns name of page
 524          *     * title-link: The value is a page title,
 525          *                   returns link to this page
 526          *     * number: Format value as number
 527          * @param string $value The parameter value that should
 528          *                      be formated
 529          * @return string|array Formated value
 530          * @since 1.21
 531          */
 532         protected function formatParameterValue( $type, $value ) {
 533                 $saveLinkFlood = $this->linkFlood;
 534
 535                 switch ( strtolower( trim( $type ) ) ) {
 536                         case 'raw':
 537                                 $value = Message::rawParam( $value );
 538                                 break;
 539                         case 'msg':
 540                                 $value = $this->msg( $value )->text();
 541                                 break;
 542                         case 'msg-content':
 543                                 $value = $this->msg( $value )->inContentLanguage()->text();
 544                                 break;
 545                         case 'number':
 546                                 $value = Message::numParam( $value );
 547                                 break;
 548                         case 'user':
 549                                 $user = User::newFromName( $value );
 550                                 $value = $user->getName();
 551                                 break;
 552                         case 'user-link':
 553                                 $this->setShowUserToolLinks( false );
 554
 555                                 $user = User::newFromName( $value );
 556                                 $value = Message::rawParam( $this->makeUserLink( $user ) );
 557
 558                                 $this->setShowUserToolLinks( $saveLinkFlood );
 559                                 break;
 560                         case 'title':
 561                                 $title = Title::newFromText( $value );
 562                                 $value = $title->getPrefixedText();
 563                                 break;
 564                         case 'title-link':
 565                                 $title = Title::newFromText( $value );
 566                                 $value = Message::rawParam( $this->makePageLink( $title ) );
 567                                 break;
 568                         case 'plain':
 569                                 // Plain text, nothing to do
 570                         default:
 571                                 // Catch other types and use the old behavior (return as-is)
 572                 }
 573
 574                 return $value;
 575         }
 576
 577         /**
 578          * Helper to make a link to the page, taking the plaintext
 579          * value in consideration.
 580          * @param Title $title The page
 581          * @param array $parameters Query parameters
 582          * @throws MWException
 583          * @return string
 584          */
 585         protected function makePageLink( Title $title = null, $parameters = array() ) {
 586                 if ( !$this->plaintext ) {
 587                         $link = Linker::link( $title, null, array(), $parameters );
 588                 } else {
 589                         if ( !$title instanceof Title ) {
 590                                 throw new MWException( "Expected title, got null" );
 591                         }
 592                         $link = '[[' . $title->getPrefixedText() . ']]';
 593                 }
 594
 595                 return $link;
 596         }
 597
 598         /**
 599          * Provides the name of the user who performed the log action.
 600          * Used as part of log action message or standalone, depending
 601          * which parts of the log entry has been hidden.
 602          * @return string
 603          */
 604         public function getPerformerElement() {
 605                 if ( $this->canView( LogPage::DELETED_USER ) ) {
 606                         $performer = $this->entry->getPerformer();
 607                         $element = $this->makeUserLink( $performer );
 608                         if ( $this->entry->isDeleted( LogPage::DELETED_USER ) ) {
 609                                 $element = $this->styleRestricedElement( $element );
 610                         }
 611                 } else {
 612                         $element = $this->getRestrictedElement( 'rev-deleted-user' );
 613                 }
 614
 615                 return $element;
 616         }
 617
 618         /**
 619          * Gets the user provided comment
 620          * @return string HTML
 621          */
 622         public function getComment() {
 623                 if ( $this->canView( LogPage::DELETED_COMMENT ) ) {
 624                         $comment = Linker::commentBlock( $this->entry->getComment() );
 625                         // No hard coded spaces thanx
 626                         $element = ltrim( $comment );
 627                         if ( $this->entry->isDeleted( LogPage::DELETED_COMMENT ) ) {
 628                                 $element = $this->styleRestricedElement( $element );
 629                         }
 630                 } else {
 631                         $element = $this->getRestrictedElement( 'rev-deleted-comment' );
 632                 }
 633
 634                 return $element;
 635         }
 636
 637         /**
 638          * Helper method for displaying restricted element.
 639          * @param string $message
 640          * @return string HTML or wiki text
 641          */
 642         protected function getRestrictedElement( $message ) {
 643                 if ( $this->plaintext ) {
 644                         return $this->msg( $message )->text();
 645                 }
 646
 647                 $content = $this->msg( $message )->escaped();
 648                 $attribs = array( 'class' => 'history-deleted' );
 649
 650                 return Html::rawElement( 'span', $attribs, $content );
 651         }
 652
 653         /**
 654          * Helper method for styling restricted element.
 655          * @param string $content
 656          * @return string HTML or wiki text
 657          */
 658         protected function styleRestricedElement( $content ) {
 659                 if ( $this->plaintext ) {
 660                         return $content;
 661                 }
 662                 $attribs = array( 'class' => 'history-deleted' );
 663
 664                 return Html::rawElement( 'span', $attribs, $content );
 665         }
 666
 667         /**
 668          * Shortcut for wfMessage which honors local context.
 669          * @param string $key
 670          * @return Message
 671          */
 672         protected function msg( $key ) {
 673                 return $this->context->msg( $key );
 674         }
 675
 676         protected function makeUserLink( User $user, $toolFlags = 0 ) {
 677                 if ( $this->plaintext ) {
 678                         $element = $user->getName();
 679                 } else {
 680                         $element = Linker::userLink(
 681                                 $user->getId(),
 682                                 $user->getName()
 683                         );
 684
 685                         if ( $this->linkFlood ) {
 686                                 $element .= Linker::userToolLinks(
 687                                         $user->getId(),
 688                                         $user->getName(),
 689                                         true, // redContribsWhenNoEdits
 690                                         $toolFlags,
 691                                         $user->getEditCount()
 692                                 );
 693                         }
 694                 }
 695
 696                 return $element;
 697         }
 698
 699         /**
 700          * @return array Array of titles that should be preloaded with LinkBatch
 701          */
 702         public function getPreloadTitles() {
 703                 return array();
 704         }
 705
 706         /**
 707          * @return array Output of getMessageParameters() for testing
 708          */
 709         public function getMessageParametersForTesting() {
 710                 // This function was added because getMessageParameters() is
 711                 // protected and a change from protected to public caused
 712                 // problems with extensions
 713                 return $this->getMessageParameters();
 714         }
 715 }
 716
 717 /**
 718  * This class formats all log entries for log types
 719  * which have not been converted to the new system.
 720  * This is not about old log entries which store
 721  * parameters in a different format - the new
 722  * LogFormatter classes have code to support formatting
 723  * those too.
 724  * @since 1.19
 725  */
 726 class LegacyLogFormatter extends LogFormatter {
 727         /**
 728          * Backward compatibility for extension changing the comment from
 729          * the LogLine hook. This will be set by the first call on getComment(),
 730          * then it might be modified by the hook when calling getActionLinks(),
 731          * so that the modified value will be returned when calling getComment()
 732          * a second time.
 733          *
 734          * @var string|null
 735          */
 736         private $comment = null;
 737
 738         /**
 739          * Cache for the result of getActionLinks() so that it does not need to
 740          * run multiple times depending on the order that getComment() and
 741          * getActionLinks() are called.
 742          *
 743          * @var string|null
 744          */
 745         private $revert = null;
 746
 747         public function getComment() {
 748                 if ( $this->comment === null ) {
 749                         $this->comment = parent::getComment();
 750                 }
 751
 752                 // Make sure we execute the LogLine hook so that we immediately return
 753                 // the correct value.
 754                 if ( $this->revert === null ) {
 755                         $this->getActionLinks();
 756                 }
 757
 758                 return $this->comment;
 759         }
 760
 761         protected function getActionMessage() {
 762                 $entry = $this->entry;
 763                 $action = LogPage::actionText(
 764                         $entry->getType(),
 765                         $entry->getSubtype(),
 766                         $entry->getTarget(),
 767                         $this->plaintext ? null : $this->context->getSkin(),
 768                         (array)$entry->getParameters(),
 769                         !$this->plaintext // whether to filter [[]] links
 770                 );
 771
 772                 $performer = $this->getPerformerElement();
 773                 if ( !$this->irctext ) {
 774                         $sep = $this->msg( 'word-separator' );
 775                         $sep = $this->plaintext ? $sep->text() : $sep->escaped();
 776                         $action = $performer . $sep . $action;
 777                 }
 778
 779                 return $action;
 780         }
 781
 782         public function getActionLinks() {
 783                 if ( $this->revert !== null ) {
 784                         return $this->revert;
 785                 }
 786
 787                 if ( $this->entry->isDeleted( LogPage::DELETED_ACTION ) ) {
 788                         $this->revert = '';
 789                         return $this->revert;
 790                 }
 791
 792                 $title = $this->entry->getTarget();
 793                 $type = $this->entry->getType();
 794                 $subtype = $this->entry->getSubtype();
 795
 796                 if ( $type == 'protect'
 797                         && ( $subtype == 'protect' || $subtype == 'modify' || $subtype == 'unprotect' )
 798                 ) {
 799                         $links = array(
 800                                 Linker::link( $title,
 801                                         $this->msg( 'hist' )->escaped(),
 802                                         array(),
 803                                         array(
 804                                                 'action' => 'history',
 805                                                 'offset' => $this->entry->getTimestamp()
 806                                         )
 807                                 )
 808                         );
 809                         if ( $this->context->getUser()->isAllowed( 'protect' ) ) {
 810                                 $links[] = Linker::linkKnown(
 811                                         $title,
 812                                         $this->msg( 'protect_change' )->escaped(),
 813                                         array(),
 814                                         array( 'action' => 'protect' )
 815                                 );
 816                         }
 817
 818                         return $this->msg( 'parentheses' )->rawParams(
 819                                 $this->context->getLanguage()->pipeList( $links ) )->escaped();
 820                 }
 821
 822                 // Do nothing. The implementation is handled by the hook modifiying the
 823                 // passed-by-ref parameters. This also changes the default value so that
 824                 // getComment() and getActionLinks() do not call them indefinitely.
 825                 $this->revert = '';
 826
 827                 // This is to populate the $comment member of this instance so that it
 828                 // can be modified when calling the hook just below.
 829                 if ( $this->comment === null ) {
 830                         $this->getComment();
 831                 }
 832
 833                 $params = $this->entry->getParameters();
 834
 835                 Hooks::run( 'LogLine', array( $type, $subtype, $title, $params,
 836                         &$this->comment, &$this->revert, $this->entry->getTimestamp() ) );
 837
 838                 return $this->revert;
 839         }
 840 }