includes/changes/ChangesList.php

   1 <?php
   2 /**
   3  * Base class for all changes lists.
   4  *
   5  * The class is used for formatting recent changes, related changes and watchlist.
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 2 of the License, or
  10  * (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along
  18  * with this program; if not, write to the Free Software Foundation, Inc.,
  19  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  20  * http://www.gnu.org/copyleft/gpl.html
  21  *
  22  * @file
  23  */
  24 use MediaWiki\Linker\LinkRenderer;
  25 use MediaWiki\MediaWikiServices;
  26 use Wikimedia\Rdbms\ResultWrapper;
  27
  28 class ChangesList extends ContextSource {
  29         const CSS_CLASS_PREFIX = 'mw-changeslist-';
  30
  31         /**
  32          * @var Skin
  33          */
  34         public $skin;
  35
  36         protected $watchlist = false;
  37         protected $lastdate;
  38         protected $message;
  39         protected $rc_cache;
  40         protected $rcCacheIndex;
  41         protected $rclistOpen;
  42         protected $rcMoveIndex;
  43
  44         /** @var BagOStuff */
  45         protected $watchMsgCache;
  46
  47         /**
  48          * @var LinkRenderer
  49          */
  50         protected $linkRenderer;
  51
  52         /**
  53          * @var array
  54          */
  55         protected $filterGroups;
  56
  57         /**
  58          * Changeslist constructor
  59          *
  60          * @param Skin|IContextSource $obj
  61          * @param array $filterGroups Array of ChangesListFilterGroup objects (currently optional)
  62          */
  63         public function __construct( $obj, array $filterGroups = [] ) {
  64                 if ( $obj instanceof IContextSource ) {
  65                         $this->setContext( $obj );
  66                         $this->skin = $obj->getSkin();
  67                 } else {
  68                         $this->setContext( $obj->getContext() );
  69                         $this->skin = $obj;
  70                 }
  71                 $this->preCacheMessages();
  72                 $this->watchMsgCache = new HashBagOStuff( [ 'maxKeys' => 50 ] );
  73                 $this->linkRenderer = MediaWikiServices::getInstance()->getLinkRenderer();
  74                 $this->filterGroups = $filterGroups;
  75         }
  76
  77         /**
  78          * Fetch an appropriate changes list class for the specified context
  79          * Some users might want to use an enhanced list format, for instance
  80          *
  81          * @param IContextSource $context
  82          * @param array $groups Array of ChangesListFilterGroup objects (currently optional)
  83          * @return ChangesList
  84          */
  85         public static function newFromContext( IContextSource $context, array $groups = [] ) {
  86                 $user = $context->getUser();
  87                 $sk = $context->getSkin();
  88                 $list = null;
  89                 if ( Hooks::run( 'FetchChangesList', [ $user, &$sk, &$list ] ) ) {
  90                         $new = $context->getRequest()->getBool( 'enhanced', $user->getOption( 'usenewrc' ) );
  91
  92                         return $new ?
  93                                 new EnhancedChangesList( $context, $groups ) :
  94                                 new OldChangesList( $context, $groups );
  95                 } else {
  96                         return $list;
  97                 }
  98         }
  99
 100         /**
 101          * Format a line
 102          *
 103          * @since 1.27
 104          *
 105          * @param RecentChange $rc Passed by reference
 106          * @param bool $watched (default false)
 107          * @param int $linenumber (default null)
 108          *
 109          * @return string|bool
 110          */
 111         public function recentChangesLine( &$rc, $watched = false, $linenumber = null ) {
 112                 throw new RuntimeException( 'recentChangesLine should be implemented' );
 113         }
 114
 115         /**
 116          * Sets the list to use a "<li class='watchlist-(namespace)-(page)'>" tag
 117          * @param bool $value
 118          */
 119         public function setWatchlistDivs( $value = true ) {
 120                 $this->watchlist = $value;
 121         }
 122
 123         /**
 124          * @return bool True when setWatchlistDivs has been called
 125          * @since 1.23
 126          */
 127         public function isWatchlist() {
 128                 return (bool)$this->watchlist;
 129         }
 130
 131         /**
 132          * As we use the same small set of messages in various methods and that
 133          * they are called often, we call them once and save them in $this->message
 134          */
 135         private function preCacheMessages() {
 136                 if ( !isset( $this->message ) ) {
 137                         foreach ( [
 138                                 'cur', 'diff', 'hist', 'enhancedrc-history', 'last', 'blocklink', 'history',
 139                                 'semicolon-separator', 'pipe-separator' ] as $msg
 140                         ) {
 141                                 $this->message[$msg] = $this->msg( $msg )->escaped();
 142                         }
 143                 }
 144         }
 145
 146         /**
 147          * Returns the appropriate flags for new page, minor change and patrolling
 148          * @param array $flags Associative array of 'flag' => Bool
 149          * @param string $nothing To use for empty space
 150          * @return string
 151          */
 152         public function recentChangesFlags( $flags, $nothing = '&#160;' ) {
 153                 $f = '';
 154                 foreach ( array_keys( $this->getConfig()->get( 'RecentChangesFlags' ) ) as $flag ) {
 155                         $f .= isset( $flags[$flag] ) && $flags[$flag]
 156                                 ? self::flag( $flag, $this->getContext() )
 157                                 : $nothing;
 158                 }
 159
 160                 return $f;
 161         }
 162
 163         /**
 164          * Get an array of default HTML class attributes for the change.
 165          *
 166          * @param RecentChange|RCCacheEntry $rc
 167          * @param string|bool $watched Optionally timestamp for adding watched class
 168          *
 169          * @return array of classes
 170          */
 171         protected function getHTMLClasses( $rc, $watched ) {
 172                 $classes = [];
 173                 $logType = $rc->mAttribs['rc_log_type'];
 174
 175                 if ( $logType ) {
 176                         $classes[] = Sanitizer::escapeClass( self::CSS_CLASS_PREFIX . 'log-' . $logType );
 177                 } else {
 178                         $classes[] = Sanitizer::escapeClass( self::CSS_CLASS_PREFIX . 'ns' .
 179                                 $rc->mAttribs['rc_namespace'] . '-' . $rc->mAttribs['rc_title'] );
 180                         $classes[] = Sanitizer::escapeClass( self::CSS_CLASS_PREFIX . 'ns-' .
 181                                 $rc->mAttribs['rc_namespace'] );
 182                 }
 183
 184                 // Indicate watched status on the line to allow for more
 185                 // comprehensive styling.
 186                 $classes[] = $watched && $rc->mAttribs['rc_timestamp'] >= $watched
 187                         ? self::CSS_CLASS_PREFIX . 'line-watched'
 188                         : self::CSS_CLASS_PREFIX . 'line-not-watched';
 189
 190                 $classes = array_merge( $classes, $this->getHTMLClassesForFilters( $rc ) );
 191
 192                 return $classes;
 193         }
 194
 195         /**
 196          * Get an array of CSS classes attributed to filters for this row
 197          *
 198          * @param RecentChange $rc
 199          * @return array Array of CSS classes
 200          */
 201         protected function getHTMLClassesForFilters( $rc ) {
 202                 $classes = [];
 203
 204                 if ( $this->filterGroups !== null ) {
 205                         foreach ( $this->filterGroups as $filterGroup ) {
 206                                 foreach ( $filterGroup->getFilters() as $filter ) {
 207                                         $filter->applyCssClassIfNeeded( $this, $rc, $classes );
 208                                 }
 209                         }
 210                 }
 211
 212                 return $classes;
 213         }
 214
 215         /**
 216          * Make an "<abbr>" element for a given change flag. The flag indicating a new page, minor edit,
 217          * bot edit, or unpatrolled edit. In English it typically contains "N", "m", "b", or "!".
 218          *
 219          * @param string $flag One key of $wgRecentChangesFlags
 220          * @param IContextSource $context
 221          * @return string HTML
 222          */
 223         public static function flag( $flag, IContextSource $context = null ) {
 224                 static $map = [ 'minoredit' => 'minor', 'botedit' => 'bot' ];
 225                 static $flagInfos = null;
 226
 227                 if ( is_null( $flagInfos ) ) {
 228                         global $wgRecentChangesFlags;
 229                         $flagInfos = [];
 230                         foreach ( $wgRecentChangesFlags as $key => $value ) {
 231                                 $flagInfos[$key]['letter'] = $value['letter'];
 232                                 $flagInfos[$key]['title'] = $value['title'];
 233                                 // Allow customized class name, fall back to flag name
 234                                 $flagInfos[$key]['class'] = isset( $value['class'] ) ? $value['class'] : $key;
 235                         }
 236                 }
 237
 238                 $context = $context ?: RequestContext::getMain();
 239
 240                 // Inconsistent naming, kepted for b/c
 241                 if ( isset( $map[$flag] ) ) {
 242                         $flag = $map[$flag];
 243                 }
 244
 245                 $info = $flagInfos[$flag];
 246                 return Html::element( 'abbr', [
 247                         'class' => $info['class'],
 248                         'title' => wfMessage( $info['title'] )->setContext( $context )->text(),
 249                 ], wfMessage( $info['letter'] )->setContext( $context )->text() );
 250         }
 251
 252         /**
 253          * Returns text for the start of the tabular part of RC
 254          * @return string
 255          */
 256         public function beginRecentChangesList() {
 257                 $this->rc_cache = [];
 258                 $this->rcMoveIndex = 0;
 259                 $this->rcCacheIndex = 0;
 260                 $this->lastdate = '';
 261                 $this->rclistOpen = false;
 262                 $this->getOutput()->addModuleStyles( 'mediawiki.special.changeslist' );
 263
 264                 return '<div class="mw-changeslist">';
 265         }
 266
 267         /**
 268          * @param ResultWrapper|array $rows
 269          */
 270         public function initChangesListRows( $rows ) {
 271                 Hooks::run( 'ChangesListInitRows', [ $this, $rows ] );
 272         }
 273
 274         /**
 275          * Show formatted char difference
 276          *
 277          * Needs the css module 'mediawiki.special.changeslist' to style output
 278          *
 279          * @param int $old Number of bytes
 280          * @param int $new Number of bytes
 281          * @param IContextSource $context
 282          * @return string
 283          */
 284         public static function showCharacterDifference( $old, $new, IContextSource $context = null ) {
 285                 if ( !$context ) {
 286                         $context = RequestContext::getMain();
 287                 }
 288
 289                 $new = (int)$new;
 290                 $old = (int)$old;
 291                 $szdiff = $new - $old;
 292
 293                 $lang = $context->getLanguage();
 294                 $config = $context->getConfig();
 295                 $code = $lang->getCode();
 296                 static $fastCharDiff = [];
 297                 if ( !isset( $fastCharDiff[$code] ) ) {
 298                         $fastCharDiff[$code] = $config->get( 'MiserMode' )
 299                                 || $context->msg( 'rc-change-size' )->plain() === '$1';
 300                 }
 301
 302                 $formattedSize = $lang->formatNum( $szdiff );
 303
 304                 if ( !$fastCharDiff[$code] ) {
 305                         $formattedSize = $context->msg( 'rc-change-size', $formattedSize )->text();
 306                 }
 307
 308                 if ( abs( $szdiff ) > abs( $config->get( 'RCChangedSizeThreshold' ) ) ) {
 309                         $tag = 'strong';
 310                 } else {
 311                         $tag = 'span';
 312                 }
 313
 314                 if ( $szdiff === 0 ) {
 315                         $formattedSizeClass = 'mw-plusminus-null';
 316                 } elseif ( $szdiff > 0 ) {
 317                         $formattedSize = '+' . $formattedSize;
 318                         $formattedSizeClass = 'mw-plusminus-pos';
 319                 } else {
 320                         $formattedSizeClass = 'mw-plusminus-neg';
 321                 }
 322
 323                 $formattedTotalSize = $context->msg( 'rc-change-size-new' )->numParams( $new )->text();
 324
 325                 return Html::element( $tag,
 326                         [ 'dir' => 'ltr', 'class' => $formattedSizeClass, 'title' => $formattedTotalSize ],
 327                         $context->msg( 'parentheses', $formattedSize )->plain() ) . $lang->getDirMark();
 328         }
 329
 330         /**
 331          * Format the character difference of one or several changes.
 332          *
 333          * @param RecentChange $old
 334          * @param RecentChange $new Last change to use, if not provided, $old will be used
 335          * @return string HTML fragment
 336          */
 337         public function formatCharacterDifference( RecentChange $old, RecentChange $new = null ) {
 338                 $oldlen = $old->mAttribs['rc_old_len'];
 339
 340                 if ( $new ) {
 341                         $newlen = $new->mAttribs['rc_new_len'];
 342                 } else {
 343                         $newlen = $old->mAttribs['rc_new_len'];
 344                 }
 345
 346                 if ( $oldlen === null || $newlen === null ) {
 347                         return '';
 348                 }
 349
 350                 return self::showCharacterDifference( $oldlen, $newlen, $this->getContext() );
 351         }
 352
 353         /**
 354          * Returns text for the end of RC
 355          * @return string
 356          */
 357         public function endRecentChangesList() {
 358                 $out = $this->rclistOpen ? "</ul>\n" : '';
 359                 $out .= '</div>';
 360
 361                 return $out;
 362         }
 363
 364         /**
 365          * @param string $s HTML to update
 366          * @param mixed $rc_timestamp
 367          */
 368         public function insertDateHeader( &$s, $rc_timestamp ) {
 369                 # Make date header if necessary
 370                 $date = $this->getLanguage()->userDate( $rc_timestamp, $this->getUser() );
 371                 if ( $date != $this->lastdate ) {
 372                         if ( $this->lastdate != '' ) {
 373                                 $s .= "</ul>\n";
 374                         }
 375                         $s .= Xml::element( 'h4', null, $date ) . "\n<ul class=\"special\">";
 376                         $this->lastdate = $date;
 377                         $this->rclistOpen = true;
 378                 }
 379         }
 380
 381         /**
 382          * @param string $s HTML to update
 383          * @param Title $title
 384          * @param string $logtype
 385          */
 386         public function insertLog( &$s, $title, $logtype ) {
 387                 $page = new LogPage( $logtype );
 388                 $logname = $page->getName()->setContext( $this->getContext() )->text();
 389                 $s .= $this->msg( 'parentheses' )->rawParams(
 390                         $this->linkRenderer->makeKnownLink( $title, $logname )
 391                 )->escaped();
 392         }
 393
 394         /**
 395          * @param string $s HTML to update
 396          * @param RecentChange $rc
 397          * @param bool|null $unpatrolled Unused variable, since 1.27.
 398          */
 399         public function insertDiffHist( &$s, &$rc, $unpatrolled = null ) {
 400                 # Diff link
 401                 if (
 402                         $rc->mAttribs['rc_type'] == RC_NEW ||
 403                         $rc->mAttribs['rc_type'] == RC_LOG ||
 404                         $rc->mAttribs['rc_type'] == RC_CATEGORIZE
 405                 ) {
 406                         $diffLink = $this->message['diff'];
 407                 } elseif ( !self::userCan( $rc, Revision::DELETED_TEXT, $this->getUser() ) ) {
 408                         $diffLink = $this->message['diff'];
 409                 } else {
 410                         $query = [
 411                                 'curid' => $rc->mAttribs['rc_cur_id'],
 412                                 'diff' => $rc->mAttribs['rc_this_oldid'],
 413                                 'oldid' => $rc->mAttribs['rc_last_oldid']
 414                         ];
 415
 416                         $diffLink = $this->linkRenderer->makeKnownLink(
 417                                 $rc->getTitle(),
 418                                 new HtmlArmor( $this->message['diff'] ),
 419                                 [ 'class' => 'mw-changeslist-diff' ],
 420                                 $query
 421                         );
 422                 }
 423                 if ( $rc->mAttribs['rc_type'] == RC_CATEGORIZE ) {
 424                         $diffhist = $diffLink . $this->message['pipe-separator'] . $this->message['hist'];
 425                 } else {
 426                         $diffhist = $diffLink . $this->message['pipe-separator'];
 427                         # History link
 428                         $diffhist .= $this->linkRenderer->makeKnownLink(
 429                                 $rc->getTitle(),
 430                                 new HtmlArmor( $this->message['hist'] ),
 431                                 [ 'class' => 'mw-changeslist-history' ],
 432                                 [
 433                                         'curid' => $rc->mAttribs['rc_cur_id'],
 434                                         'action' => 'history'
 435                                 ]
 436                         );
 437                 }
 438
 439                 // @todo FIXME: Hard coded ". .". Is there a message for this? Should there be?
 440                 $s .= $this->msg( 'parentheses' )->rawParams( $diffhist )->escaped() .
 441                         ' <span class="mw-changeslist-separator">. .</span> ';
 442         }
 443
 444         /**
 445          * @param string $s Article link will be appended to this string, in place.
 446          * @param RecentChange $rc
 447          * @param bool $unpatrolled
 448          * @param bool $watched
 449          * @deprecated since 1.27, use getArticleLink instead.
 450          */
 451         public function insertArticleLink( &$s, RecentChange $rc, $unpatrolled, $watched ) {
 452                 $s .= $this->getArticleLink( $rc, $unpatrolled, $watched );
 453         }
 454
 455         /**
 456          * @param RecentChange $rc
 457          * @param bool $unpatrolled
 458          * @param bool $watched
 459          * @return string HTML
 460          * @since 1.26
 461          */
 462         public function getArticleLink( &$rc, $unpatrolled, $watched ) {
 463                 $params = [];
 464                 if ( $rc->getTitle()->isRedirect() ) {
 465                         $params = [ 'redirect' => 'no' ];
 466                 }
 467
 468                 $articlelink = $this->linkRenderer->makeLink(
 469                         $rc->getTitle(),
 470                         null,
 471                         [ 'class' => 'mw-changeslist-title' ],
 472                         $params
 473                 );
 474                 if ( $this->isDeleted( $rc, Revision::DELETED_TEXT ) ) {
 475                         $articlelink = '<span class="history-deleted">' . $articlelink . '</span>';
 476                 }
 477                 # To allow for boldening pages watched by this user
 478                 $articlelink = "<span class=\"mw-title\">{$articlelink}</span>";
 479                 # RTL/LTR marker
 480                 $articlelink .= $this->getLanguage()->getDirMark();
 481
 482                 # TODO: Deprecate the $s argument, it seems happily unused.
 483                 $s = '';
 484                 # Avoid PHP 7.1 warning from passing $this by reference
 485                 $changesList = $this;
 486                 Hooks::run( 'ChangesListInsertArticleLink',
 487                         [ &$changesList, &$articlelink, &$s, &$rc, $unpatrolled, $watched ] );
 488
 489                 return "{$s} {$articlelink}";
 490         }
 491
 492         /**
 493          * Get the timestamp from $rc formatted with current user's settings
 494          * and a separator
 495          *
 496          * @param RecentChange $rc
 497          * @return string HTML fragment
 498          */
 499         public function getTimestamp( $rc ) {
 500                 // @todo FIXME: Hard coded ". .". Is there a message for this? Should there be?
 501                 return $this->message['semicolon-separator'] . '<span class="mw-changeslist-date">' .
 502                         $this->getLanguage()->userTime(
 503                                 $rc->mAttribs['rc_timestamp'],
 504                                 $this->getUser()
 505                         ) . '</span> <span class="mw-changeslist-separator">. .</span> ';
 506         }
 507
 508         /**
 509          * Insert time timestamp string from $rc into $s
 510          *
 511          * @param string $s HTML to update
 512          * @param RecentChange $rc
 513          */
 514         public function insertTimestamp( &$s, $rc ) {
 515                 $s .= $this->getTimestamp( $rc );
 516         }
 517
 518         /**
 519          * Insert links to user page, user talk page and eventually a blocking link
 520          *
 521          * @param string &$s HTML to update
 522          * @param RecentChange &$rc
 523          */
 524         public function insertUserRelatedLinks( &$s, &$rc ) {
 525                 if ( $this->isDeleted( $rc, Revision::DELETED_USER ) ) {
 526                         $s .= ' <span class="history-deleted">' .
 527                                 $this->msg( 'rev-deleted-user' )->escaped() . '</span>';
 528                 } else {
 529                         $s .= $this->getLanguage()->getDirMark() . Linker::userLink( $rc->mAttribs['rc_user'],
 530                                 $rc->mAttribs['rc_user_text'] );
 531                         $s .= Linker::userToolLinks( $rc->mAttribs['rc_user'], $rc->mAttribs['rc_user_text'] );
 532                 }
 533         }
 534
 535         /**
 536          * Insert a formatted action
 537          *
 538          * @param RecentChange $rc
 539          * @return string
 540          */
 541         public function insertLogEntry( $rc ) {
 542                 $formatter = LogFormatter::newFromRow( $rc->mAttribs );
 543                 $formatter->setContext( $this->getContext() );
 544                 $formatter->setShowUserToolLinks( true );
 545                 $mark = $this->getLanguage()->getDirMark();
 546
 547                 return $formatter->getActionText() . " $mark" . $formatter->getComment();
 548         }
 549
 550         /**
 551          * Insert a formatted comment
 552          * @param RecentChange $rc
 553          * @return string
 554          */
 555         public function insertComment( $rc ) {
 556                 if ( $this->isDeleted( $rc, Revision::DELETED_COMMENT ) ) {
 557                         return ' <span class="history-deleted">' .
 558                                 $this->msg( 'rev-deleted-comment' )->escaped() . '</span>';
 559                 } else {
 560                         return Linker::commentBlock( $rc->mAttribs['rc_comment'], $rc->getTitle() );
 561                 }
 562         }
 563
 564         /**
 565          * Returns the string which indicates the number of watching users
 566          * @param int $count Number of user watching a page
 567          * @return string
 568          */
 569         protected function numberofWatchingusers( $count ) {
 570                 if ( $count <= 0 ) {
 571                         return '';
 572                 }
 573                 $cache = $this->watchMsgCache;
 574                 return $cache->getWithSetCallback( $count, $cache::TTL_INDEFINITE,
 575                         function () use ( $count ) {
 576                                 return $this->msg( 'number_of_watching_users_RCview' )
 577                                         ->numParams( $count )->escaped();
 578                         }
 579                 );
 580         }
 581
 582         /**
 583          * Determine if said field of a revision is hidden
 584          * @param RCCacheEntry|RecentChange $rc
 585          * @param int $field One of DELETED_* bitfield constants
 586          * @return bool
 587          */
 588         public static function isDeleted( $rc, $field ) {
 589                 return ( $rc->mAttribs['rc_deleted'] & $field ) == $field;
 590         }
 591
 592         /**
 593          * Determine if the current user is allowed to view a particular
 594          * field of this revision, if it's marked as deleted.
 595          * @param RCCacheEntry|RecentChange $rc
 596          * @param int $field
 597          * @param User $user User object to check, or null to use $wgUser
 598          * @return bool
 599          */
 600         public static function userCan( $rc, $field, User $user = null ) {
 601                 if ( $rc->mAttribs['rc_type'] == RC_LOG ) {
 602                         return LogEventsList::userCanBitfield( $rc->mAttribs['rc_deleted'], $field, $user );
 603                 } else {
 604                         return Revision::userCanBitfield( $rc->mAttribs['rc_deleted'], $field, $user );
 605                 }
 606         }
 607
 608         /**
 609          * @param string $link
 610          * @param bool $watched
 611          * @return string
 612          */
 613         protected function maybeWatchedLink( $link, $watched = false ) {
 614                 if ( $watched ) {
 615                         return '<strong class="mw-watched">' . $link . '</strong>';
 616                 } else {
 617                         return '<span class="mw-rc-unwatched">' . $link . '</span>';
 618                 }
 619         }
 620
 621         /** Inserts a rollback link
 622          *
 623          * @param string $s
 624          * @param RecentChange $rc
 625          */
 626         public function insertRollback( &$s, &$rc ) {
 627                 if ( $rc->mAttribs['rc_type'] == RC_EDIT
 628                         && $rc->mAttribs['rc_this_oldid']
 629                         && $rc->mAttribs['rc_cur_id']
 630                 ) {
 631                         $page = $rc->getTitle();
 632                         /** Check for rollback and edit permissions, disallow special pages, and only
 633                          * show a link on the top-most revision */
 634                         if ( $this->getUser()->isAllowed( 'rollback' )
 635                                 && $rc->mAttribs['page_latest'] == $rc->mAttribs['rc_this_oldid']
 636                         ) {
 637                                 $rev = new Revision( [
 638                                         'title' => $page,
 639                                         'id' => $rc->mAttribs['rc_this_oldid'],
 640                                         'user' => $rc->mAttribs['rc_user'],
 641                                         'user_text' => $rc->mAttribs['rc_user_text'],
 642                                         'deleted' => $rc->mAttribs['rc_deleted']
 643                                 ] );
 644                                 $s .= ' ' . Linker::generateRollback( $rev, $this->getContext() );
 645                         }
 646                 }
 647         }
 648
 649         /**
 650          * @param RecentChange $rc
 651          * @return string
 652          * @since 1.26
 653          */
 654         public function getRollback( RecentChange $rc ) {
 655                 $s = '';
 656                 $this->insertRollback( $s, $rc );
 657                 return $s;
 658         }
 659
 660         /**
 661          * @param string $s
 662          * @param RecentChange $rc
 663          * @param array $classes
 664          */
 665         public function insertTags( &$s, &$rc, &$classes ) {
 666                 if ( empty( $rc->mAttribs['ts_tags'] ) ) {
 667                         return;
 668                 }
 669
 670                 list( $tagSummary, $newClasses ) = ChangeTags::formatSummaryRow(
 671                         $rc->mAttribs['ts_tags'],
 672                         'changeslist',
 673                         $this->getContext()
 674                 );
 675                 $classes = array_merge( $classes, $newClasses );
 676                 $s .= ' ' . $tagSummary;
 677         }
 678
 679         /**
 680          * @param RecentChange $rc
 681          * @param array $classes
 682          * @return string
 683          * @since 1.26
 684          */
 685         public function getTags( RecentChange $rc, array &$classes ) {
 686                 $s = '';
 687                 $this->insertTags( $s, $rc, $classes );
 688                 return $s;
 689         }
 690
 691         public function insertExtra( &$s, &$rc, &$classes ) {
 692                 // Empty, used for subclasses to add anything special.
 693         }
 694
 695         protected function showAsUnpatrolled( RecentChange $rc ) {
 696                 return self::isUnpatrolled( $rc, $this->getUser() );
 697         }
 698
 699         /**
 700          * @param object|RecentChange $rc Database row from recentchanges or a RecentChange object
 701          * @param User $user
 702          * @return bool
 703          */
 704         public static function isUnpatrolled( $rc, User $user ) {
 705                 if ( $rc instanceof RecentChange ) {
 706                         $isPatrolled = $rc->mAttribs['rc_patrolled'];
 707                         $rcType = $rc->mAttribs['rc_type'];
 708                         $rcLogType = $rc->mAttribs['rc_log_type'];
 709                 } else {
 710                         $isPatrolled = $rc->rc_patrolled;
 711                         $rcType = $rc->rc_type;
 712                         $rcLogType = $rc->rc_log_type;
 713                 }
 714
 715                 if ( !$isPatrolled ) {
 716                         if ( $user->useRCPatrol() ) {
 717                                 return true;
 718                         }
 719                         if ( $user->useNPPatrol() && $rcType == RC_NEW ) {
 720                                 return true;
 721                         }
 722                         if ( $user->useFilePatrol() && $rcLogType == 'upload' ) {
 723                                 return true;
 724                         }
 725                 }
 726
 727                 return false;
 728         }
 729
 730         /**
 731          * Determines whether a revision is linked to this change; this may not be the case
 732          * when the categorization wasn't done by an edit but a conditional parser function
 733          *
 734          * @since 1.27
 735          *
 736          * @param RecentChange|RCCacheEntry $rcObj
 737          * @return bool
 738          */
 739         protected function isCategorizationWithoutRevision( $rcObj ) {
 740                 return intval( $rcObj->getAttribute( 'rc_type' ) ) === RC_CATEGORIZE
 741                         && intval( $rcObj->getAttribute( 'rc_this_oldid' ) ) === 0;
 742         }
 743
 744         /**
 745          * Get recommended data attributes for a change line.
 746          * @param RecentChange $rc
 747          * @return string[] attribute name => value
 748          */
 749         protected function getDataAttributes( RecentChange $rc ) {
 750                 $attrs = [];
 751
 752                 $type = $rc->getAttribute( 'rc_source' );
 753                 switch ( $type ) {
 754                         case RecentChange::SRC_EDIT:
 755                         case RecentChange::SRC_NEW:
 756                                 $attrs['data-mw-revid'] = $rc->mAttribs['rc_this_oldid'];
 757                                 break;
 758                         case RecentChange::SRC_LOG:
 759                                 $attrs['data-mw-logid'] = $rc->mAttribs['rc_logid'];
 760                                 $attrs['data-mw-logaction'] =
 761                                         $rc->mAttribs['rc_log_type'] . '/' . $rc->mAttribs['rc_log_action'];
 762                                 break;
 763                 }
 764
 765                 $attrs[ 'data-mw-ts' ] = $rc->getAttribute( 'rc_timestamp' );
 766
 767                 return $attrs;
 768         }
 769 }