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 use MediaWiki\Linker\LinkRenderer;
  26 use MediaWiki\MediaWikiServices;
  27
  28 /**
  29  * Implements the default log formatting.
  30  *
  31  * Can be overridden by subclassing and setting:
  32  *
  33  *     $wgLogActionsHandlers['type/subtype'] = 'class'; or
  34  *     $wgLogActionsHandlers['type/*'] = 'class';
  35  *
  36  * @since 1.19
  37  */
  38 class LogFormatter {
  39         // Audience options for viewing usernames, comments, and actions
  40         const FOR_PUBLIC = 1;
  41         const FOR_THIS_USER = 2;
  42
  43         // Static->
  44
  45         /**
  46          * Constructs a new formatter suitable for given entry.
  47          * @param LogEntry $entry
  48          * @return LogFormatter
  49          */
  50         public static function newFromEntry( LogEntry $entry ) {
  51                 global $wgLogActionsHandlers;
  52                 $fulltype = $entry->getFullType();
  53                 $wildcard = $entry->getType() . '/*';
  54                 $handler = '';
  55
  56                 if ( isset( $wgLogActionsHandlers[$fulltype] ) ) {
  57                         $handler = $wgLogActionsHandlers[$fulltype];
  58                 } elseif ( isset( $wgLogActionsHandlers[$wildcard] ) ) {
  59                         $handler = $wgLogActionsHandlers[$wildcard];
  60                 }
  61
  62                 if ( $handler !== '' && is_string( $handler ) && class_exists( $handler ) ) {
  63                         return new $handler( $entry );
  64                 }
  65
  66                 return new LegacyLogFormatter( $entry );
  67         }
  68
  69         /**
  70          * Handy shortcut for constructing a formatter directly from
  71          * database row.
  72          * @param stdClass|array $row
  73          * @see DatabaseLogEntry::getSelectQueryData
  74          * @return LogFormatter
  75          */
  76         public static function newFromRow( $row ) {
  77                 return self::newFromEntry( DatabaseLogEntry::newFromRow( $row ) );
  78         }
  79
  80         // Nonstatic->
  81
  82         /** @var LogEntryBase */
  83         protected $entry;
  84
  85         /** @var int Constant for handling log_deleted */
  86         protected $audience = self::FOR_PUBLIC;
  87
  88         /** @var IContextSource Context for logging */
  89         public $context;
  90
  91         /** @var bool Whether to output user tool links */
  92         protected $linkFlood = false;
  93
  94         /**
  95          * Set to true if we are constructing a message text that is going to
  96          * be included in page history or send to IRC feed. Links are replaced
  97          * with plaintext or with [[pagename]] kind of syntax, that is parsed
  98          * by page histories and IRC feeds.
  99          * @var string
 100          */
 101         protected $plaintext = false;
 102
 103         /** @var string */
 104         protected $irctext = false;
 105
 106         /**
 107          * @var LinkRenderer|null
 108          */
 109         private $linkRenderer;
 110
 111         protected function __construct( LogEntry $entry ) {
 112                 $this->entry = $entry;
 113                 $this->context = RequestContext::getMain();
 114         }
 115
 116         /**
 117          * Replace the default context
 118          * @param IContextSource $context
 119          */
 120         public function setContext( IContextSource $context ) {
 121                 $this->context = $context;
 122         }
 123
 124         /**
 125          * @since 1.30
 126          * @param LinkRenderer $linkRenderer
 127          */
 128         public function setLinkRenderer( LinkRenderer $linkRenderer ) {
 129                 $this->linkRenderer = $linkRenderer;
 130         }
 131
 132         /**
 133          * @since 1.30
 134          * @return LinkRenderer
 135          */
 136         public function getLinkRenderer() {
 137                 if ( $this->linkRenderer !== null ) {
 138                         return $this->linkRenderer;
 139                 } else {
 140                         return MediaWikiServices::getInstance()->getLinkRenderer();
 141                 }
 142         }
 143
 144         /**
 145          * Set the visibility restrictions for displaying content.
 146          * If set to public, and an item is deleted, then it will be replaced
 147          * with a placeholder even if the context user is allowed to view it.
 148          * @param int $audience Const self::FOR_THIS_USER or self::FOR_PUBLIC
 149          */
 150         public function setAudience( $audience ) {
 151                 $this->audience = ( $audience == self::FOR_THIS_USER )
 152                         ? self::FOR_THIS_USER
 153                         : self::FOR_PUBLIC;
 154         }
 155
 156         /**
 157          * Check if a log item can be displayed
 158          * @param int $field LogPage::DELETED_* constant
 159          * @return bool
 160          */
 161         protected function canView( $field ) {
 162                 if ( $this->audience == self::FOR_THIS_USER ) {
 163                         return LogEventsList::userCanBitfield(
 164                                 $this->entry->getDeleted(), $field, $this->context->getUser() );
 165                 } else {
 166                         return !$this->entry->isDeleted( $field );
 167                 }
 168         }
 169
 170         /**
 171          * If set to true, will produce user tool links after
 172          * the user name. This should be replaced with generic
 173          * CSS/JS solution.
 174          * @param bool $value
 175          */
 176         public function setShowUserToolLinks( $value ) {
 177                 $this->linkFlood = $value;
 178         }
 179
 180         /**
 181          * Ugly hack to produce plaintext version of the message.
 182          * Usually you also want to set extraneous request context
 183          * to avoid formatting for any particular user.
 184          * @see getActionText()
 185          * @return string Plain text
 186          */
 187         public function getPlainActionText() {
 188                 $this->plaintext = true;
 189                 $text = $this->getActionText();
 190                 $this->plaintext = false;
 191
 192                 return $text;
 193         }
 194
 195         /**
 196          * Even uglier hack to maintain backwards compatibilty with IRC bots
 197          * (T36508).
 198          * @see getActionText()
 199          * @return string Text
 200          */
 201         public function getIRCActionComment() {
 202                 $actionComment = $this->getIRCActionText();
 203                 $comment = $this->entry->getComment();
 204
 205                 if ( $comment != '' ) {
 206                         if ( $actionComment == '' ) {
 207                                 $actionComment = $comment;
 208                         } else {
 209                                 $actionComment .= wfMessage( 'colon-separator' )->inContentLanguage()->text() . $comment;
 210                         }
 211                 }
 212
 213                 return $actionComment;
 214         }
 215
 216         /**
 217          * Even uglier hack to maintain backwards compatibilty with IRC bots
 218          * (T36508).
 219          * @see getActionText()
 220          * @return string Text
 221          */
 222         public function getIRCActionText() {
 223                 global $wgContLang;
 224
 225                 $this->plaintext = true;
 226                 $this->irctext = true;
 227
 228                 $entry = $this->entry;
 229                 $parameters = $entry->getParameters();
 230                 // @see LogPage::actionText()
 231                 // Text of title the action is aimed at.
 232                 $target = $entry->getTarget()->getPrefixedText();
 233                 $text = null;
 234                 switch ( $entry->getType() ) {
 235                         case 'move':
 236                                 switch ( $entry->getSubtype() ) {
 237                                         case 'move':
 238                                                 $movesource = $parameters['4::target'];
 239                                                 $text = wfMessage( '1movedto2' )
 240                                                         ->rawParams( $target, $movesource )->inContentLanguage()->escaped();
 241                                                 break;
 242                                         case 'move_redir':
 243                                                 $movesource = $parameters['4::target'];
 244                                                 $text = wfMessage( '1movedto2_redir' )
 245                                                         ->rawParams( $target, $movesource )->inContentLanguage()->escaped();
 246                                                 break;
 247                                         case 'move-noredirect':
 248                                                 break;
 249                                         case 'move_redir-noredirect':
 250                                                 break;
 251                                 }
 252                                 break;
 253
 254                         case 'delete':
 255                                 switch ( $entry->getSubtype() ) {
 256                                         case 'delete':
 257                                                 $text = wfMessage( 'deletedarticle' )
 258                                                         ->rawParams( $target )->inContentLanguage()->escaped();
 259                                                 break;
 260                                         case 'restore':
 261                                                 $text = wfMessage( 'undeletedarticle' )
 262                                                         ->rawParams( $target )->inContentLanguage()->escaped();
 263                                                 break;
 264                                         //case 'revision': // Revision deletion
 265                                         //case 'event': // Log deletion
 266                                         // see https://github.com/wikimedia/mediawiki/commit/a9c243b7b5289dad204278dbe7ed571fd914e395
 267                                         //default:
 268                                 }
 269                                 break;
 270
 271                         case 'patrol':
 272                                 // https://github.com/wikimedia/mediawiki/commit/1a05f8faf78675dc85984f27f355b8825b43efff
 273                                 // Create a diff link to the patrolled revision
 274                                 if ( $entry->getSubtype() === 'patrol' ) {
 275                                         $diffLink = htmlspecialchars(
 276                                                 wfMessage( 'patrol-log-diff', $parameters['4::curid'] )
 277                                                         ->inContentLanguage()->text() );
 278                                         $text = wfMessage( 'patrol-log-line', $diffLink, "[[$target]]", "" )
 279                                                 ->inContentLanguage()->text();
 280                                 } else {
 281                                         // broken??
 282                                 }
 283                                 break;
 284
 285                         case 'protect':
 286                                 switch ( $entry->getSubtype() ) {
 287                                         case 'protect':
 288                                                 $text = wfMessage( 'protectedarticle' )
 289                                                         ->rawParams( $target . ' ' . $parameters['4::description'] )->inContentLanguage()->escaped();
 290                                                 break;
 291                                         case 'unprotect':
 292                                                 $text = wfMessage( 'unprotectedarticle' )
 293                                                         ->rawParams( $target )->inContentLanguage()->escaped();
 294                                                 break;
 295                                         case 'modify':
 296                                                 $text = wfMessage( 'modifiedarticleprotection' )
 297                                                         ->rawParams( $target . ' ' . $parameters['4::description'] )->inContentLanguage()->escaped();
 298                                                 break;
 299                                         case 'move_prot':
 300                                                 $text = wfMessage( 'movedarticleprotection' )
 301                                                         ->rawParams( $target, $parameters['4::oldtitle'] )->inContentLanguage()->escaped();
 302                                                 break;
 303                                 }
 304                                 break;
 305
 306                         case 'newusers':
 307                                 switch ( $entry->getSubtype() ) {
 308                                         case 'newusers':
 309                                         case 'create':
 310                                                 $text = wfMessage( 'newuserlog-create-entry' )
 311                                                         ->inContentLanguage()->escaped();
 312                                                 break;
 313                                         case 'create2':
 314                                         case 'byemail':
 315                                                 $text = wfMessage( 'newuserlog-create2-entry' )
 316                                                         ->rawParams( $target )->inContentLanguage()->escaped();
 317                                                 break;
 318                                         case 'autocreate':
 319                                                 $text = wfMessage( 'newuserlog-autocreate-entry' )
 320                                                         ->inContentLanguage()->escaped();
 321                                                 break;
 322                                 }
 323                                 break;
 324
 325                         case 'upload':
 326                                 switch ( $entry->getSubtype() ) {
 327                                         case 'upload':
 328                                                 $text = wfMessage( 'uploadedimage' )
 329                                                         ->rawParams( $target )->inContentLanguage()->escaped();
 330                                                 break;
 331                                         case 'overwrite':
 332                                                 $text = wfMessage( 'overwroteimage' )
 333                                                         ->rawParams( $target )->inContentLanguage()->escaped();
 334                                                 break;
 335                                 }
 336                                 break;
 337
 338                         case 'rights':
 339                                 if ( count( $parameters['4::oldgroups'] ) ) {
 340                                         $oldgroups = implode( ', ', $parameters['4::oldgroups'] );
 341                                 } else {
 342                                         $oldgroups = wfMessage( 'rightsnone' )->inContentLanguage()->escaped();
 343                                 }
 344                                 if ( count( $parameters['5::newgroups'] ) ) {
 345                                         $newgroups = implode( ', ', $parameters['5::newgroups'] );
 346                                 } else {
 347                                         $newgroups = wfMessage( 'rightsnone' )->inContentLanguage()->escaped();
 348                                 }
 349                                 switch ( $entry->getSubtype() ) {
 350                                         case 'rights':
 351                                                 $text = wfMessage( 'rightslogentry' )
 352                                                         ->rawParams( $target, $oldgroups, $newgroups )->inContentLanguage()->escaped();
 353                                                 break;
 354                                         case 'autopromote':
 355                                                 $text = wfMessage( 'rightslogentry-autopromote' )
 356                                                         ->rawParams( $target, $oldgroups, $newgroups )->inContentLanguage()->escaped();
 357                                                 break;
 358                                 }
 359                                 break;
 360
 361                         case 'merge':
 362                                 $text = wfMessage( 'pagemerge-logentry' )
 363                                         ->rawParams( $target, $parameters['4::dest'], $parameters['5::mergepoint'] )
 364                                         ->inContentLanguage()->escaped();
 365                                 break;
 366
 367                         case 'block':
 368                                 switch ( $entry->getSubtype() ) {
 369                                         case 'block':
 370                                                 // Keep compatibility with extensions by checking for
 371                                                 // new key (5::duration/6::flags) or old key (0/optional 1)
 372                                                 if ( $entry->isLegacy() ) {
 373                                                         $rawDuration = $parameters[0];
 374                                                         $rawFlags = isset( $parameters[1] ) ? $parameters[1] : '';
 375                                                 } else {
 376                                                         $rawDuration = $parameters['5::duration'];
 377                                                         $rawFlags = $parameters['6::flags'];
 378                                                 }
 379                                                 $duration = $wgContLang->translateBlockExpiry(
 380                                                         $rawDuration,
 381                                                         null,
 382                                                         wfTimestamp( TS_UNIX, $entry->getTimestamp() )
 383                                                 );
 384                                                 $flags = BlockLogFormatter::formatBlockFlags( $rawFlags, $wgContLang );
 385                                                 $text = wfMessage( 'blocklogentry' )
 386                                                         ->rawParams( $target, $duration, $flags )->inContentLanguage()->escaped();
 387                                                 break;
 388                                         case 'unblock':
 389                                                 $text = wfMessage( 'unblocklogentry' )
 390                                                         ->rawParams( $target )->inContentLanguage()->escaped();
 391                                                 break;
 392                                         case 'reblock':
 393                                                 $duration = $wgContLang->translateBlockExpiry(
 394                                                         $parameters['5::duration'],
 395                                                         null,
 396                                                         wfTimestamp( TS_UNIX, $entry->getTimestamp() )
 397                                                 );
 398                                                 $flags = BlockLogFormatter::formatBlockFlags( $parameters['6::flags'], $wgContLang );
 399                                                 $text = wfMessage( 'reblock-logentry' )
 400                                                         ->rawParams( $target, $duration, $flags )->inContentLanguage()->escaped();
 401                                                 break;
 402                                 }
 403                                 break;
 404
 405                         case 'import':
 406                                 switch ( $entry->getSubtype() ) {
 407                                         case 'upload':
 408                                                 $text = wfMessage( 'import-logentry-upload' )
 409                                                         ->rawParams( $target )->inContentLanguage()->escaped();
 410                                                 break;
 411                                         case 'interwiki':
 412                                                 $text = wfMessage( 'import-logentry-interwiki' )
 413                                                         ->rawParams( $target )->inContentLanguage()->escaped();
 414                                                 break;
 415                                 }
 416                                 break;
 417                         // case 'suppress' --private log -- aaron  (so we know who to blame in a few years :-D)
 418                         // default:
 419                 }
 420                 if ( is_null( $text ) ) {
 421                         $text = $this->getPlainActionText();
 422                 }
 423
 424                 $this->plaintext = false;
 425                 $this->irctext = false;
 426
 427                 return $text;
 428         }
 429
 430         /**
 431          * Gets the log action, including username.
 432          * @return string HTML
 433          */
 434         public function getActionText() {
 435                 if ( $this->canView( LogPage::DELETED_ACTION ) ) {
 436                         $element = $this->getActionMessage();
 437                         if ( $element instanceof Message ) {
 438                                 $element = $this->plaintext ? $element->text() : $element->escaped();
 439                         }
 440                         if ( $this->entry->isDeleted( LogPage::DELETED_ACTION ) ) {
 441                                 $element = $this->styleRestricedElement( $element );
 442                         }
 443                 } else {
 444                         $sep = $this->msg( 'word-separator' );
 445                         $sep = $this->plaintext ? $sep->text() : $sep->escaped();
 446                         $performer = $this->getPerformerElement();
 447                         $element = $performer . $sep . $this->getRestrictedElement( 'rev-deleted-event' );
 448                 }
 449
 450                 return $element;
 451         }
 452
 453         /**
 454          * Returns a sentence describing the log action. Usually
 455          * a Message object is returned, but old style log types
 456          * and entries might return pre-escaped HTML string.
 457          * @return Message|string Pre-escaped HTML
 458          */
 459         protected function getActionMessage() {
 460                 $message = $this->msg( $this->getMessageKey() );
 461                 $message->params( $this->getMessageParameters() );
 462
 463                 return $message;
 464         }
 465
 466         /**
 467          * Returns a key to be used for formatting the action sentence.
 468          * Default is logentry-TYPE-SUBTYPE for modern logs. Legacy log
 469          * types will use custom keys, and subclasses can also alter the
 470          * key depending on the entry itself.
 471          * @return string Message key
 472          */
 473         protected function getMessageKey() {
 474                 $type = $this->entry->getType();
 475                 $subtype = $this->entry->getSubtype();
 476
 477                 return "logentry-$type-$subtype";
 478         }
 479
 480         /**
 481          * Returns extra links that comes after the action text, like "revert", etc.
 482          *
 483          * @return string
 484          */
 485         public function getActionLinks() {
 486                 return '';
 487         }
 488
 489         /**
 490          * Extracts the optional extra parameters for use in action messages.
 491          * The array indexes start from number 3.
 492          * @return array
 493          */
 494         protected function extractParameters() {
 495                 $entry = $this->entry;
 496                 $params = [];
 497
 498                 if ( $entry->isLegacy() ) {
 499                         foreach ( $entry->getParameters() as $index => $value ) {
 500                                 $params[$index + 3] = $value;
 501                         }
 502                 }
 503
 504                 // Filter out parameters which are not in format #:foo
 505                 foreach ( $entry->getParameters() as $key => $value ) {
 506                         if ( strpos( $key, ':' ) === false ) {
 507                                 continue;
 508                         }
 509                         list( $index, $type, ) = explode( ':', $key, 3 );
 510                         if ( ctype_digit( $index ) ) {
 511                                 $params[$index - 1] = $this->formatParameterValue( $type, $value );
 512                         }
 513                 }
 514
 515                 /* Message class doesn't like non consecutive numbering.
 516                  * Fill in missing indexes with empty strings to avoid
 517                  * incorrect renumbering.
 518                  */
 519                 if ( count( $params ) ) {
 520                         $max = max( array_keys( $params ) );
 521                         // index 0 to 2 are added in getMessageParameters
 522                         for ( $i = 3; $i < $max; $i++ ) {
 523                                 if ( !isset( $params[$i] ) ) {
 524                                         $params[$i] = '';
 525                                 }
 526                         }
 527                 }
 528
 529                 return $params;
 530         }
 531
 532         /**
 533          * Formats parameters intented for action message from
 534          * array of all parameters. There are three hardcoded
 535          * parameters (array is zero-indexed, this list not):
 536          *  - 1: user name with premade link
 537          *  - 2: usable for gender magic function
 538          *  - 3: target page with premade link
 539          * @return array
 540          */
 541         protected function getMessageParameters() {
 542                 if ( isset( $this->parsedParameters ) ) {
 543                         return $this->parsedParameters;
 544                 }
 545
 546                 $entry = $this->entry;
 547                 $params = $this->extractParameters();
 548                 $params[0] = Message::rawParam( $this->getPerformerElement() );
 549                 $params[1] = $this->canView( LogPage::DELETED_USER ) ? $entry->getPerformer()->getName() : '';
 550                 $params[2] = Message::rawParam( $this->makePageLink( $entry->getTarget() ) );
 551
 552                 // Bad things happens if the numbers are not in correct order
 553                 ksort( $params );
 554
 555                 $this->parsedParameters = $params;
 556                 return $this->parsedParameters;
 557         }
 558
 559         /**
 560          * Formats parameters values dependent to their type
 561          * @param string $type The type of the value.
 562          *   Valid are currently:
 563          *     * - (empty) or plain: The value is returned as-is
 564          *     * raw: The value will be added to the log message
 565          *            as raw parameter (e.g. no escaping)
 566          *            Use this only if there is no other working
 567          *            type like user-link or title-link
 568          *     * msg: The value is a message-key, the output is
 569          *            the message in user language
 570          *     * msg-content: The value is a message-key, the output
 571          *                    is the message in content language
 572          *     * user: The value is a user name, e.g. for GENDER
 573          *     * user-link: The value is a user name, returns a
 574          *                  link for the user
 575          *     * title: The value is a page title,
 576          *              returns name of page
 577          *     * title-link: The value is a page title,
 578          *                   returns link to this page
 579          *     * number: Format value as number
 580          *     * list: Format value as a comma-separated list
 581          * @param mixed $value The parameter value that should be formatted
 582          * @return string|array Formated value
 583          * @since 1.21
 584          */
 585         protected function formatParameterValue( $type, $value ) {
 586                 $saveLinkFlood = $this->linkFlood;
 587
 588                 switch ( strtolower( trim( $type ) ) ) {
 589                         case 'raw':
 590                                 $value = Message::rawParam( $value );
 591                                 break;
 592                         case 'list':
 593                                 $value = $this->context->getLanguage()->commaList( $value );
 594                                 break;
 595                         case 'msg':
 596                                 $value = $this->msg( $value )->text();
 597                                 break;
 598                         case 'msg-content':
 599                                 $value = $this->msg( $value )->inContentLanguage()->text();
 600                                 break;
 601                         case 'number':
 602                                 $value = Message::numParam( $value );
 603                                 break;
 604                         case 'user':
 605                                 $user = User::newFromName( $value );
 606                                 $value = $user->getName();
 607                                 break;
 608                         case 'user-link':
 609                                 $this->setShowUserToolLinks( false );
 610
 611                                 $user = User::newFromName( $value );
 612                                 $value = Message::rawParam( $this->makeUserLink( $user ) );
 613
 614                                 $this->setShowUserToolLinks( $saveLinkFlood );
 615                                 break;
 616                         case 'title':
 617                                 $title = Title::newFromText( $value );
 618                                 $value = $title->getPrefixedText();
 619                                 break;
 620                         case 'title-link':
 621                                 $title = Title::newFromText( $value );
 622                                 $value = Message::rawParam( $this->makePageLink( $title ) );
 623                                 break;
 624                         case 'plain':
 625                                 // Plain text, nothing to do
 626                         default:
 627                                 // Catch other types and use the old behavior (return as-is)
 628                 }
 629
 630                 return $value;
 631         }
 632
 633         /**
 634          * Helper to make a link to the page, taking the plaintext
 635          * value in consideration.
 636          * @param Title $title The page
 637          * @param array $parameters Query parameters
 638          * @param string|null $html Linktext of the link as raw html
 639          * @throws MWException
 640          * @return string
 641          */
 642         protected function makePageLink( Title $title = null, $parameters = [], $html = null ) {
 643                 if ( !$title instanceof Title ) {
 644                         throw new MWException( 'Expected title, got null' );
 645                 }
 646                 if ( !$this->plaintext ) {
 647                         $html = $html !== null ? new HtmlArmor( $html ) : $html;
 648                         $link = $this->getLinkRenderer()->makeLink( $title, $html, [], $parameters );
 649                 } else {
 650                         $link = '[[' . $title->getPrefixedText() . ']]';
 651                 }
 652
 653                 return $link;
 654         }
 655
 656         /**
 657          * Provides the name of the user who performed the log action.
 658          * Used as part of log action message or standalone, depending
 659          * which parts of the log entry has been hidden.
 660          * @return string
 661          */
 662         public function getPerformerElement() {
 663                 if ( $this->canView( LogPage::DELETED_USER ) ) {
 664                         $performer = $this->entry->getPerformer();
 665                         $element = $this->makeUserLink( $performer );
 666                         if ( $this->entry->isDeleted( LogPage::DELETED_USER ) ) {
 667                                 $element = $this->styleRestricedElement( $element );
 668                         }
 669                 } else {
 670                         $element = $this->getRestrictedElement( 'rev-deleted-user' );
 671                 }
 672
 673                 return $element;
 674         }
 675
 676         /**
 677          * Gets the user provided comment
 678          * @return string HTML
 679          */
 680         public function getComment() {
 681                 if ( $this->canView( LogPage::DELETED_COMMENT ) ) {
 682                         $comment = Linker::commentBlock( $this->entry->getComment() );
 683                         // No hard coded spaces thanx
 684                         $element = ltrim( $comment );
 685                         if ( $this->entry->isDeleted( LogPage::DELETED_COMMENT ) ) {
 686                                 $element = $this->styleRestricedElement( $element );
 687                         }
 688                 } else {
 689                         $element = $this->getRestrictedElement( 'rev-deleted-comment' );
 690                 }
 691
 692                 return $element;
 693         }
 694
 695         /**
 696          * Helper method for displaying restricted element.
 697          * @param string $message
 698          * @return string HTML or wiki text
 699          */
 700         protected function getRestrictedElement( $message ) {
 701                 if ( $this->plaintext ) {
 702                         return $this->msg( $message )->text();
 703                 }
 704
 705                 $content = $this->msg( $message )->escaped();
 706                 $attribs = [ 'class' => 'history-deleted' ];
 707
 708                 return Html::rawElement( 'span', $attribs, $content );
 709         }
 710
 711         /**
 712          * Helper method for styling restricted element.
 713          * @param string $content
 714          * @return string HTML or wiki text
 715          */
 716         protected function styleRestricedElement( $content ) {
 717                 if ( $this->plaintext ) {
 718                         return $content;
 719                 }
 720                 $attribs = [ 'class' => 'history-deleted' ];
 721
 722                 return Html::rawElement( 'span', $attribs, $content );
 723         }
 724
 725         /**
 726          * Shortcut for wfMessage which honors local context.
 727          * @param string $key
 728          * @return Message
 729          */
 730         protected function msg( $key ) {
 731                 return $this->context->msg( $key );
 732         }
 733
 734         protected function makeUserLink( User $user, $toolFlags = 0 ) {
 735                 if ( $this->plaintext ) {
 736                         $element = $user->getName();
 737                 } else {
 738                         $element = Linker::userLink(
 739                                 $user->getId(),
 740                                 $user->getName()
 741                         );
 742
 743                         if ( $this->linkFlood ) {
 744                                 $element .= Linker::userToolLinks(
 745                                         $user->getId(),
 746                                         $user->getName(),
 747                                         true, // redContribsWhenNoEdits
 748                                         $toolFlags,
 749                                         $user->getEditCount()
 750                                 );
 751                         }
 752                 }
 753
 754                 return $element;
 755         }
 756
 757         /**
 758          * @return array Array of titles that should be preloaded with LinkBatch
 759          */
 760         public function getPreloadTitles() {
 761                 return [];
 762         }
 763
 764         /**
 765          * @return array Output of getMessageParameters() for testing
 766          */
 767         public function getMessageParametersForTesting() {
 768                 // This function was added because getMessageParameters() is
 769                 // protected and a change from protected to public caused
 770                 // problems with extensions
 771                 return $this->getMessageParameters();
 772         }
 773
 774         /**
 775          * Get the array of parameters, converted from legacy format if necessary.
 776          * @since 1.25
 777          * @return array
 778          */
 779         protected function getParametersForApi() {
 780                 return $this->entry->getParameters();
 781         }
 782
 783         /**
 784          * Format parameters for API output
 785          *
 786          * The result array should generally map named keys to values. Index and
 787          * type should be omitted, e.g. "4::foo" should be returned as "foo" in the
 788          * output. Values should generally be unformatted.
 789          *
 790          * Renames or removals of keys besides from the legacy numeric format to
 791          * modern named style should be avoided. Any renames should be announced to
 792          * the mediawiki-api-announce mailing list.
 793          *
 794          * @since 1.25
 795          * @return array
 796          */
 797         public function formatParametersForApi() {
 798                 $logParams = [];
 799                 foreach ( $this->getParametersForApi() as $key => $value ) {
 800                         $vals = explode( ':', $key, 3 );
 801                         if ( count( $vals ) !== 3 ) {
 802                                 $logParams[$key] = $value;
 803                                 continue;
 804                         }
 805                         $logParams += $this->formatParameterValueForApi( $vals[2], $vals[1], $value );
 806                 }
 807                 ApiResult::setIndexedTagName( $logParams, 'param' );
 808                 ApiResult::setArrayType( $logParams, 'assoc' );
 809
 810                 return $logParams;
 811         }
 812
 813         /**
 814          * Format a single parameter value for API output
 815          *
 816          * @since 1.25
 817          * @param string $name
 818          * @param string $type
 819          * @param string $value
 820          * @return array
 821          */
 822         protected function formatParameterValueForApi( $name, $type, $value ) {
 823                 $type = strtolower( trim( $type ) );
 824                 switch ( $type ) {
 825                         case 'bool':
 826                                 $value = (bool)$value;
 827                                 break;
 828
 829                         case 'number':
 830                                 if ( ctype_digit( $value ) || is_int( $value ) ) {
 831                                         $value = (int)$value;
 832                                 } else {
 833                                         $value = (float)$value;
 834                                 }
 835                                 break;
 836
 837                         case 'array':
 838                         case 'assoc':
 839                         case 'kvp':
 840                                 if ( is_array( $value ) ) {
 841                                         ApiResult::setArrayType( $value, $type );
 842                                 }
 843                                 break;
 844
 845                         case 'timestamp':
 846                                 $value = wfTimestamp( TS_ISO_8601, $value );
 847                                 break;
 848
 849                         case 'msg':
 850                         case 'msg-content':
 851                                 $msg = $this->msg( $value );
 852                                 if ( $type === 'msg-content' ) {
 853                                         $msg->inContentLanguage();
 854                                 }
 855                                 $value = [];
 856                                 $value["{$name}_key"] = $msg->getKey();
 857                                 if ( $msg->getParams() ) {
 858                                         $value["{$name}_params"] = $msg->getParams();
 859                                 }
 860                                 $value["{$name}_text"] = $msg->text();
 861                                 return $value;
 862
 863                         case 'title':
 864                         case 'title-link':
 865                                 $title = Title::newFromText( $value );
 866                                 if ( !$title ) {
 867                                         // Huh? Do something halfway sane.
 868                                         $title = SpecialPage::getTitleFor( 'Badtitle', $value );
 869                                 }
 870                                 $value = [];
 871                                 ApiQueryBase::addTitleInfo( $value, $title, "{$name}_" );
 872                                 return $value;
 873
 874                         case 'user':
 875                         case 'user-link':
 876                                 $user = User::newFromName( $value );
 877                                 if ( $user ) {
 878                                         $value = $user->getName();
 879                                 }
 880                                 break;
 881
 882                         default:
 883                                 // do nothing
 884                                 break;
 885                 }
 886
 887                 return [ $name => $value ];
 888         }
 889 }
 890
 891 /**
 892  * This class formats all log entries for log types
 893  * which have not been converted to the new system.
 894  * This is not about old log entries which store
 895  * parameters in a different format - the new
 896  * LogFormatter classes have code to support formatting
 897  * those too.
 898  * @since 1.19
 899  */
 900 class LegacyLogFormatter extends LogFormatter {
 901         /**
 902          * Backward compatibility for extension changing the comment from
 903          * the LogLine hook. This will be set by the first call on getComment(),
 904          * then it might be modified by the hook when calling getActionLinks(),
 905          * so that the modified value will be returned when calling getComment()
 906          * a second time.
 907          *
 908          * @var string|null
 909          */
 910         private $comment = null;
 911
 912         /**
 913          * Cache for the result of getActionLinks() so that it does not need to
 914          * run multiple times depending on the order that getComment() and
 915          * getActionLinks() are called.
 916          *
 917          * @var string|null
 918          */
 919         private $revert = null;
 920
 921         public function getComment() {
 922                 if ( $this->comment === null ) {
 923                         $this->comment = parent::getComment();
 924                 }
 925
 926                 // Make sure we execute the LogLine hook so that we immediately return
 927                 // the correct value.
 928                 if ( $this->revert === null ) {
 929                         $this->getActionLinks();
 930                 }
 931
 932                 return $this->comment;
 933         }
 934
 935         protected function getActionMessage() {
 936                 $entry = $this->entry;
 937                 $action = LogPage::actionText(
 938                         $entry->getType(),
 939                         $entry->getSubtype(),
 940                         $entry->getTarget(),
 941                         $this->plaintext ? null : $this->context->getSkin(),
 942                         (array)$entry->getParameters(),
 943                         !$this->plaintext // whether to filter [[]] links
 944                 );
 945
 946                 $performer = $this->getPerformerElement();
 947                 if ( !$this->irctext ) {
 948                         $sep = $this->msg( 'word-separator' );
 949                         $sep = $this->plaintext ? $sep->text() : $sep->escaped();
 950                         $action = $performer . $sep . $action;
 951                 }
 952
 953                 return $action;
 954         }
 955
 956         public function getActionLinks() {
 957                 if ( $this->revert !== null ) {
 958                         return $this->revert;
 959                 }
 960
 961                 if ( $this->entry->isDeleted( LogPage::DELETED_ACTION ) ) {
 962                         $this->revert = '';
 963                         return $this->revert;
 964                 }
 965
 966                 $title = $this->entry->getTarget();
 967                 $type = $this->entry->getType();
 968                 $subtype = $this->entry->getSubtype();
 969
 970                 // Do nothing. The implementation is handled by the hook modifiying the
 971                 // passed-by-ref parameters. This also changes the default value so that
 972                 // getComment() and getActionLinks() do not call them indefinitely.
 973                 $this->revert = '';
 974
 975                 // This is to populate the $comment member of this instance so that it
 976                 // can be modified when calling the hook just below.
 977                 if ( $this->comment === null ) {
 978                         $this->getComment();
 979                 }
 980
 981                 $params = $this->entry->getParameters();
 982
 983                 Hooks::run( 'LogLine', [ $type, $subtype, $title, $params,
 984                         &$this->comment, &$this->revert, $this->entry->getTimestamp() ] );
 985
 986                 return $this->revert;
 987         }
 988 }