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