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
  25 class ChangesList extends ContextSource {
  26         /**
  27          * @var Skin
  28          */
  29         public $skin;
  30
  31         protected $watchlist = false;
  32         protected $lastdate;
  33         protected $message;
  34         protected $rc_cache;
  35         protected $rcCacheIndex;
  36         protected $rclistOpen;
  37         protected $rcMoveIndex;
  38
  39         /** @var MapCacheLRU */
  40         protected $watchingCache;
  41
  42         /**
  43          * Changeslist constructor
  44          *
  45          * @param Skin|IContextSource $obj
  46          */
  47         public function __construct( $obj ) {
  48                 if ( $obj instanceof IContextSource ) {
  49                         $this->setContext( $obj );
  50                         $this->skin = $obj->getSkin();
  51                 } else {
  52                         $this->setContext( $obj->getContext() );
  53                         $this->skin = $obj;
  54                 }
  55                 $this->preCacheMessages();
  56                 $this->watchingCache = new MapCacheLRU( 50 );
  57         }
  58
  59         /**
  60          * Fetch an appropriate changes list class for the specified context
  61          * Some users might want to use an enhanced list format, for instance
  62          *
  63          * @param IContextSource $context
  64          * @return ChangesList
  65          */
  66         public static function newFromContext( IContextSource $context ) {
  67                 $user = $context->getUser();
  68                 $sk = $context->getSkin();
  69                 $list = null;
  70                 if ( wfRunHooks( 'FetchChangesList', array( $user, &$sk, &$list ) ) ) {
  71                         $new = $context->getRequest()->getBool( 'enhanced', $user->getOption( 'usenewrc' ) );
  72
  73                         return $new ? new EnhancedChangesList( $context ) : new OldChangesList( $context );
  74                 } else {
  75                         return $list;
  76                 }
  77         }
  78
  79         /**
  80          * Sets the list to use a "<li class='watchlist-(namespace)-(page)'>" tag
  81          * @param bool $value
  82          */
  83         public function setWatchlistDivs( $value = true ) {
  84                 $this->watchlist = $value;
  85         }
  86
  87         /**
  88          * @return bool True when setWatchlistDivs has been called
  89          * @since 1.23
  90          */
  91         public function isWatchlist() {
  92                 return (bool)$this->watchlist;
  93         }
  94
  95         /**
  96          * As we use the same small set of messages in various methods and that
  97          * they are called often, we call them once and save them in $this->message
  98          */
  99         private function preCacheMessages() {
 100                 if ( !isset( $this->message ) ) {
 101                         foreach ( array(
 102                                 'cur', 'diff', 'hist', 'enhancedrc-history', 'last', 'blocklink', 'history',
 103                                 'semicolon-separator', 'pipe-separator' ) as $msg
 104                         ) {
 105                                 $this->message[$msg] = $this->msg( $msg )->escaped();
 106                         }
 107                 }
 108         }
 109
 110         /**
 111          * Returns the appropriate flags for new page, minor change and patrolling
 112          * @param array $flags Associative array of 'flag' => Bool
 113          * @param string $nothing To use for empty space
 114          * @return string
 115          */
 116         public function recentChangesFlags( $flags, $nothing = '&#160;' ) {
 117                 $f = '';
 118                 foreach ( array_keys( $this->getConfig()->get( 'RecentChangesFlags' ) ) as $flag ) {
 119                         $f .= isset( $flags[$flag] ) && $flags[$flag]
 120                                 ? self::flag( $flag )
 121                                 : $nothing;
 122                 }
 123
 124                 return $f;
 125         }
 126
 127         /**
 128          * Provide the "<abbr>" element appropriate to a given abbreviated flag,
 129          * namely the flag indicating a new page, a minor edit, a bot edit, or an
 130          * unpatrolled edit.  By default in English it will contain "N", "m", "b",
 131          * "!" respectively, plus it will have an appropriate title and class.
 132          *
 133          * @param string $flag One key of $wgRecentChangesFlags
 134          * @return string Raw HTML
 135          */
 136         public static function flag( $flag ) {
 137                 static $flagInfos = null;
 138                 if ( is_null( $flagInfos ) ) {
 139                         global $wgRecentChangesFlags;
 140                         $flagInfos = array();
 141                         foreach ( $wgRecentChangesFlags as $key => $value ) {
 142                                 $flagInfos[$key]['letter'] = wfMessage( $value['letter'] )->escaped();
 143                                 $flagInfos[$key]['title'] = wfMessage( $value['title'] )->escaped();
 144                                 // Allow customized class name, fall back to flag name
 145                                 $flagInfos[$key]['class'] = Sanitizer::escapeClass(
 146                                         isset( $value['class'] ) ? $value['class'] : $key );
 147                         }
 148                 }
 149
 150                 // Inconsistent naming, bleh, kepted for b/c
 151                 $map = array(
 152                         'minoredit' => 'minor',
 153                         'botedit' => 'bot',
 154                 );
 155                 if ( isset( $map[$flag] ) ) {
 156                         $flag = $map[$flag];
 157                 }
 158
 159                 return "<abbr class='" . $flagInfos[$flag]['class'] . "' title='" .
 160                         $flagInfos[$flag]['title'] . "'>" . $flagInfos[$flag]['letter'] .
 161                         '</abbr>';
 162         }
 163
 164         /**
 165          * Returns text for the start of the tabular part of RC
 166          * @return string
 167          */
 168         public function beginRecentChangesList() {
 169                 $this->rc_cache = array();
 170                 $this->rcMoveIndex = 0;
 171                 $this->rcCacheIndex = 0;
 172                 $this->lastdate = '';
 173                 $this->rclistOpen = false;
 174                 $this->getOutput()->addModuleStyles( 'mediawiki.special.changeslist' );
 175
 176                 return '<div class="mw-changeslist">';
 177         }
 178
 179         /**
 180          * @param ResultWrapper|array $rows
 181          */
 182         public function initChangesListRows( $rows ) {
 183                 wfRunHooks( 'ChangesListInitRows', array( $this, $rows ) );
 184         }
 185
 186         /**
 187          * Show formatted char difference
 188          * @param int $old Number of bytes
 189          * @param int $new Number of bytes
 190          * @param IContextSource $context
 191          * @return string
 192          */
 193         public static function showCharacterDifference( $old, $new, IContextSource $context = null ) {
 194                 if ( !$context ) {
 195                         $context = RequestContext::getMain();
 196                 }
 197
 198                 $new = (int)$new;
 199                 $old = (int)$old;
 200                 $szdiff = $new - $old;
 201
 202                 $lang = $context->getLanguage();
 203                 $config = $context->getConfig();
 204                 $code = $lang->getCode();
 205                 static $fastCharDiff = array();
 206                 if ( !isset( $fastCharDiff[$code] ) ) {
 207                         $fastCharDiff[$code] = $config->get( 'MiserMode' ) || $context->msg( 'rc-change-size' )->plain() === '$1';
 208                 }
 209
 210                 $formattedSize = $lang->formatNum( $szdiff );
 211
 212                 if ( !$fastCharDiff[$code] ) {
 213                         $formattedSize = $context->msg( 'rc-change-size', $formattedSize )->text();
 214                 }
 215
 216                 if ( abs( $szdiff ) > abs( $config->get( 'RCChangedSizeThreshold' ) ) ) {
 217                         $tag = 'strong';
 218                 } else {
 219                         $tag = 'span';
 220                 }
 221
 222                 if ( $szdiff === 0 ) {
 223                         $formattedSizeClass = 'mw-plusminus-null';
 224                 } elseif ( $szdiff > 0 ) {
 225                         $formattedSize = '+' . $formattedSize;
 226                         $formattedSizeClass = 'mw-plusminus-pos';
 227                 } else {
 228                         $formattedSizeClass = 'mw-plusminus-neg';
 229                 }
 230
 231                 $formattedTotalSize = $context->msg( 'rc-change-size-new' )->numParams( $new )->text();
 232
 233                 return Html::element( $tag,
 234                         array( 'dir' => 'ltr', 'class' => $formattedSizeClass, 'title' => $formattedTotalSize ),
 235                         $context->msg( 'parentheses', $formattedSize )->plain() ) . $lang->getDirMark();
 236         }
 237
 238         /**
 239          * Format the character difference of one or several changes.
 240          *
 241          * @param RecentChange $old
 242          * @param RecentChange $new Last change to use, if not provided, $old will be used
 243          * @return string HTML fragment
 244          */
 245         public function formatCharacterDifference( RecentChange $old, RecentChange $new = null ) {
 246                 $oldlen = $old->mAttribs['rc_old_len'];
 247
 248                 if ( $new ) {
 249                         $newlen = $new->mAttribs['rc_new_len'];
 250                 } else {
 251                         $newlen = $old->mAttribs['rc_new_len'];
 252                 }
 253
 254                 if ( $oldlen === null || $newlen === null ) {
 255                         return '';
 256                 }
 257
 258                 return self::showCharacterDifference( $oldlen, $newlen, $this->getContext() );
 259         }
 260
 261         /**
 262          * Returns text for the end of RC
 263          * @return string
 264          */
 265         public function endRecentChangesList() {
 266                 $out = $this->rclistOpen ? "</ul>\n" : '';
 267                 $out .= '</div>';
 268
 269                 return $out;
 270         }
 271
 272         /**
 273          * @param string $s HTML to update
 274          * @param mixed $rc_timestamp
 275          */
 276         public function insertDateHeader( &$s, $rc_timestamp ) {
 277                 # Make date header if necessary
 278                 $date = $this->getLanguage()->userDate( $rc_timestamp, $this->getUser() );
 279                 if ( $date != $this->lastdate ) {
 280                         if ( $this->lastdate != '' ) {
 281                                 $s .= "</ul>\n";
 282                         }
 283                         $s .= Xml::element( 'h4', null, $date ) . "\n<ul class=\"special\">";
 284                         $this->lastdate = $date;
 285                         $this->rclistOpen = true;
 286                 }
 287         }
 288
 289         /**
 290          * @param string $s HTML to update
 291          * @param Title $title
 292          * @param string $logtype
 293          */
 294         public function insertLog( &$s, $title, $logtype ) {
 295                 $page = new LogPage( $logtype );
 296                 $logname = $page->getName()->escaped();
 297                 $s .= $this->msg( 'parentheses' )->rawParams( Linker::linkKnown( $title, $logname ) )->escaped();
 298         }
 299
 300         /**
 301          * @param string $s HTML to update
 302          * @param RecentChange $rc
 303          * @param bool $unpatrolled
 304          */
 305         public function insertDiffHist( &$s, &$rc, $unpatrolled ) {
 306                 # Diff link
 307                 if ( $rc->mAttribs['rc_type'] == RC_NEW || $rc->mAttribs['rc_type'] == RC_LOG ) {
 308                         $diffLink = $this->message['diff'];
 309                 } elseif ( !self::userCan( $rc, Revision::DELETED_TEXT, $this->getUser() ) ) {
 310                         $diffLink = $this->message['diff'];
 311                 } else {
 312                         $query = array(
 313                                 'curid' => $rc->mAttribs['rc_cur_id'],
 314                                 'diff' => $rc->mAttribs['rc_this_oldid'],
 315                                 'oldid' => $rc->mAttribs['rc_last_oldid']
 316                         );
 317
 318                         $diffLink = Linker::linkKnown(
 319                                 $rc->getTitle(),
 320                                 $this->message['diff'],
 321                                 array( 'tabindex' => $rc->counter ),
 322                                 $query
 323                         );
 324                 }
 325                 $diffhist = $diffLink . $this->message['pipe-separator'];
 326                 # History link
 327                 $diffhist .= Linker::linkKnown(
 328                         $rc->getTitle(),
 329                         $this->message['hist'],
 330                         array(),
 331                         array(
 332                                 'curid' => $rc->mAttribs['rc_cur_id'],
 333                                 'action' => 'history'
 334                         )
 335                 );
 336                 // @todo FIXME: Hard coded ". .". Is there a message for this? Should there be?
 337                 $s .= $this->msg( 'parentheses' )->rawParams( $diffhist )->escaped() .
 338                         ' <span class="mw-changeslist-separator">. .</span> ';
 339         }
 340
 341         /**
 342          * @param string $s HTML to update
 343          * @param RecentChange $rc
 344          * @param bool $unpatrolled
 345          * @param bool $watched
 346          */
 347         public function insertArticleLink( &$s, &$rc, $unpatrolled, $watched ) {
 348                 $params = array();
 349                 if ( $rc->getTitle()->isRedirect() ) {
 350                         $params = array( 'redirect' => 'no' );
 351                 }
 352
 353                 $articlelink = Linker::linkKnown(
 354                         $rc->getTitle(),
 355                         null,
 356                         array( 'class' => 'mw-changeslist-title' ),
 357                         $params
 358                 );
 359                 if ( $this->isDeleted( $rc, Revision::DELETED_TEXT ) ) {
 360                         $articlelink = '<span class="history-deleted">' . $articlelink . '</span>';
 361                 }
 362                 # To allow for boldening pages watched by this user
 363                 $articlelink = "<span class=\"mw-title\">{$articlelink}</span>";
 364                 # RTL/LTR marker
 365                 $articlelink .= $this->getLanguage()->getDirMark();
 366
 367                 wfRunHooks( 'ChangesListInsertArticleLink',
 368                         array( &$this, &$articlelink, &$s, &$rc, $unpatrolled, $watched ) );
 369
 370                 $s .= " $articlelink";
 371         }
 372
 373         /**
 374          * Get the timestamp from $rc formatted with current user's settings
 375          * and a separator
 376          *
 377          * @param RecentChange $rc
 378          * @return string HTML fragment
 379          */
 380         public function getTimestamp( $rc ) {
 381                 // @todo FIXME: Hard coded ". .". Is there a message for this? Should there be?
 382                 return $this->message['semicolon-separator'] . '<span class="mw-changeslist-date">' .
 383                         $this->getLanguage()->userTime(
 384                                 $rc->mAttribs['rc_timestamp'],
 385                                 $this->getUser()
 386                         ) . '</span> <span class="mw-changeslist-separator">. .</span> ';
 387         }
 388
 389         /**
 390          * Insert time timestamp string from $rc into $s
 391          *
 392          * @param string $s HTML to update
 393          * @param RecentChange $rc
 394          */
 395         public function insertTimestamp( &$s, $rc ) {
 396                 $s .= $this->getTimestamp( $rc );
 397         }
 398
 399         /**
 400          * Insert links to user page, user talk page and eventually a blocking link
 401          *
 402          * @param string &$s HTML to update
 403          * @param RecentChange &$rc
 404          */
 405         public function insertUserRelatedLinks( &$s, &$rc ) {
 406                 if ( $this->isDeleted( $rc, Revision::DELETED_USER ) ) {
 407                         $s .= ' <span class="history-deleted">' .
 408                                 $this->msg( 'rev-deleted-user' )->escaped() . '</span>';
 409                 } else {
 410                         $s .= $this->getLanguage()->getDirMark() . Linker::userLink( $rc->mAttribs['rc_user'],
 411                                 $rc->mAttribs['rc_user_text'] );
 412                         $s .= Linker::userToolLinks( $rc->mAttribs['rc_user'], $rc->mAttribs['rc_user_text'] );
 413                 }
 414         }
 415
 416         /**
 417          * Insert a formatted action
 418          *
 419          * @param RecentChange $rc
 420          * @return string
 421          */
 422         public function insertLogEntry( $rc ) {
 423                 $formatter = LogFormatter::newFromRow( $rc->mAttribs );
 424                 $formatter->setContext( $this->getContext() );
 425                 $formatter->setShowUserToolLinks( true );
 426                 $mark = $this->getLanguage()->getDirMark();
 427
 428                 return $formatter->getActionText() . " $mark" . $formatter->getComment();
 429         }
 430
 431         /**
 432          * Insert a formatted comment
 433          * @param RecentChange $rc
 434          * @return string
 435          */
 436         public function insertComment( $rc ) {
 437                 if ( $this->isDeleted( $rc, Revision::DELETED_COMMENT ) ) {
 438                         return ' <span class="history-deleted">' .
 439                                 $this->msg( 'rev-deleted-comment' )->escaped() . '</span>';
 440                 } else {
 441                         return Linker::commentBlock( $rc->mAttribs['rc_comment'], $rc->getTitle() );
 442                 }
 443         }
 444
 445         /**
 446          * Check whether to enable recent changes patrol features
 447          *
 448          * @deprecated since 1.22
 449          * @return bool
 450          */
 451         public static function usePatrol() {
 452                 global $wgUser;
 453
 454                 wfDeprecated( __METHOD__, '1.22' );
 455
 456                 return $wgUser->useRCPatrol();
 457         }
 458
 459         /**
 460          * Returns the string which indicates the number of watching users
 461          * @param int $count Number of user watching a page
 462          * @return string
 463          */
 464         protected function numberofWatchingusers( $count ) {
 465                 $cache = $this->watchingCache;
 466                 if ( $count > 0 ) {
 467                         if ( !$cache->has( $count ) ) {
 468                                 $cache->set( $count, $this->msg( 'number_of_watching_users_RCview' )
 469                                         ->numParams( $count )->escaped() );
 470                         }
 471
 472                         return $cache->get( $count );
 473                 } else {
 474                         return '';
 475                 }
 476         }
 477
 478         /**
 479          * Determine if said field of a revision is hidden
 480          * @param RCCacheEntry|RecentChange $rc
 481          * @param int $field One of DELETED_* bitfield constants
 482          * @return bool
 483          */
 484         public static function isDeleted( $rc, $field ) {
 485                 return ( $rc->mAttribs['rc_deleted'] & $field ) == $field;
 486         }
 487
 488         /**
 489          * Determine if the current user is allowed to view a particular
 490          * field of this revision, if it's marked as deleted.
 491          * @param RCCacheEntry|RecentChange $rc
 492          * @param int $field
 493          * @param User $user User object to check, or null to use $wgUser
 494          * @return bool
 495          */
 496         public static function userCan( $rc, $field, User $user = null ) {
 497                 if ( $rc->mAttribs['rc_type'] == RC_LOG ) {
 498                         return LogEventsList::userCanBitfield( $rc->mAttribs['rc_deleted'], $field, $user );
 499                 } else {
 500                         return Revision::userCanBitfield( $rc->mAttribs['rc_deleted'], $field, $user );
 501                 }
 502         }
 503
 504         /**
 505          * @param string $link
 506          * @param bool $watched
 507          * @return string
 508          */
 509         protected function maybeWatchedLink( $link, $watched = false ) {
 510                 if ( $watched ) {
 511                         return '<strong class="mw-watched">' . $link . '</strong>';
 512                 } else {
 513                         return '<span class="mw-rc-unwatched">' . $link . '</span>';
 514                 }
 515         }
 516
 517         /** Inserts a rollback link
 518          *
 519          * @param string $s
 520          * @param RecentChange $rc
 521          */
 522         public function insertRollback( &$s, &$rc ) {
 523                 if ( $rc->mAttribs['rc_type'] == RC_EDIT
 524                         && $rc->mAttribs['rc_this_oldid']
 525                         && $rc->mAttribs['rc_cur_id']
 526                 ) {
 527                         $page = $rc->getTitle();
 528                         /** Check for rollback and edit permissions, disallow special pages, and only
 529                          * show a link on the top-most revision */
 530                         if ( $this->getUser()->isAllowed( 'rollback' )
 531                                 && $rc->mAttribs['page_latest'] == $rc->mAttribs['rc_this_oldid']
 532                         ) {
 533                                 $rev = new Revision( array(
 534                                         'title' => $page,
 535                                         'id' => $rc->mAttribs['rc_this_oldid'],
 536                                         'user' => $rc->mAttribs['rc_user'],
 537                                         'user_text' => $rc->mAttribs['rc_user_text'],
 538                                         'deleted' => $rc->mAttribs['rc_deleted']
 539                                 ) );
 540                                 $s .= ' ' . Linker::generateRollback( $rev, $this->getContext() );
 541                         }
 542                 }
 543         }
 544
 545         /**
 546          * @param string $s
 547          * @param RecentChange $rc
 548          * @param array $classes
 549          */
 550         public function insertTags( &$s, &$rc, &$classes ) {
 551                 if ( empty( $rc->mAttribs['ts_tags'] ) ) {
 552                         return;
 553                 }
 554
 555                 list( $tagSummary, $newClasses ) = ChangeTags::formatSummaryRow(
 556                         $rc->mAttribs['ts_tags'],
 557                         'changeslist'
 558                 );
 559                 $classes = array_merge( $classes, $newClasses );
 560                 $s .= ' ' . $tagSummary;
 561         }
 562
 563         public function insertExtra( &$s, &$rc, &$classes ) {
 564                 // Empty, used for subclasses to add anything special.
 565         }
 566
 567         protected function showAsUnpatrolled( RecentChange $rc ) {
 568                 return self::isUnpatrolled( $rc, $this->getUser() );
 569         }
 570
 571         /**
 572          * @param object|RecentChange $rc Database row from recentchanges or a RecentChange object
 573          * @param User $user
 574          * @return bool
 575          */
 576         public static function isUnpatrolled( $rc, User $user ) {
 577                 if ( $rc instanceof RecentChange ) {
 578                         $isPatrolled = $rc->mAttribs['rc_patrolled'];
 579                         $rcType = $rc->mAttribs['rc_type'];
 580                 } else {
 581                         $isPatrolled = $rc->rc_patrolled;
 582                         $rcType = $rc->rc_type;
 583                 }
 584
 585                 if ( !$isPatrolled ) {
 586                         if ( $user->useRCPatrol() ) {
 587                                 return true;
 588                         }
 589                         if ( $user->useNPPatrol() && $rcType == RC_NEW ) {
 590                                 return true;
 591                         }
 592                 }
 593
 594                 return false;
 595         }
 596 }