includes/PageHistory.php

   1 <?php
   2 /**
   3  * Page history
   4  *
   5  * Split off from Article.php and Skin.php, 2003-12-22
   6  * @package MediaWiki
   7  */
   8
   9 /**
  10  * This class handles printing the history page for an article.  In order to
  11  * be efficient, it uses timestamps rather than offsets for paging, to avoid
  12  * costly LIMIT,offset queries.
  13  *
  14  * Construct it by passing in an Article, and call $h->history() to print the
  15  * history.
  16  *
  17  * @package MediaWiki
  18  */
  19
  20 class PageHistory {
  21         const DIR_PREV = 0;
  22         const DIR_NEXT = 1;
  23
  24         var $mArticle, $mTitle, $mSkin;
  25         var $lastdate;
  26         var $linesonpage;
  27         var $mNotificationTimestamp;
  28         var $mLatestId = null;
  29
  30         /**
  31          * Construct a new PageHistory.
  32          *
  33          * @param Article $article
  34          * @returns nothing
  35          */
  36         function PageHistory($article) {
  37                 global $wgUser;
  38
  39                 $this->mArticle =& $article;
  40                 $this->mTitle =& $article->mTitle;
  41                 $this->mNotificationTimestamp = NULL;
  42                 $this->mSkin = $wgUser->getSkin();
  43
  44                 $this->defaultLimit = 50;
  45         }
  46
  47         /**
  48          * Print the history page for an article.
  49          *
  50          * @returns nothing
  51          */
  52         function history() {
  53                 global $wgOut, $wgRequest, $wgTitle;
  54
  55                 /*
  56                  * Allow client caching.
  57                  */
  58
  59                 if( $wgOut->checkLastModified( $this->mArticle->getTimestamp() ) )
  60                         /* Client cache fresh and headers sent, nothing more to do. */
  61                         return;
  62
  63                 $fname = 'PageHistory::history';
  64                 wfProfileIn( $fname );
  65
  66                 /*
  67                  * Setup page variables.
  68                  */
  69                 $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
  70                 $wgOut->setSubtitle( wfMsg( 'revhistory' ) );
  71                 $wgOut->setArticleFlag( false );
  72                 $wgOut->setArticleRelated( true );
  73                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
  74                 $wgOut->setSyndicated( true );
  75
  76                 $feedType = $wgRequest->getVal( 'feed' );
  77                 if( $feedType ) {
  78                         wfProfileOut( $fname );
  79                         return $this->feed( $feedType );
  80                 }
  81
  82                 /*
  83                  * Fail if article doesn't exist.
  84                  */
  85                 if( !$this->mTitle->exists() ) {
  86                         $wgOut->addWikiText( wfMsg( 'nohistory' ) );
  87                         wfProfileOut( $fname );
  88                         return;
  89                 }
  90
  91                 $dbr =& wfGetDB(DB_SLAVE);
  92
  93                 /*
  94                  * Extract limit, the number of revisions to show, and
  95                  * offset, the timestamp to begin at, from the URL.
  96                  */
  97                 $limit = $wgRequest->getInt('limit', $this->defaultLimit);
  98                 if ( $limit <= 0 ) {
  99                         $limit = $this->defaultLimit;
 100                 } elseif ( $limit > 50000 ) {
 101                         # Arbitrary maximum
 102                         # Any more than this and we'll probably get an out of memory error
 103                         $limit = 50000;
 104                 }
 105
 106                 $offset = $wgRequest->getText('offset');
 107
 108                 /* Offset must be an integral. */
 109                 if (!strlen($offset) || !preg_match("/^[0-9]+$/", $offset))
 110                         $offset = 0;
 111 #               $offset = $dbr->timestamp($offset);
 112                 $dboffset = $offset === 0 ? 0 : $dbr->timestamp($offset);
 113                 /*
 114                  * "go=last" means to jump to the last history page.
 115                  */
 116                 if (($gowhere = $wgRequest->getText("go")) !== NULL) {
 117                         $gourl = null;
 118                         switch ($gowhere) {
 119                         case "first":
 120                                 if (($lastid = $this->getLastOffsetForPaging($this->mTitle->getArticleID(), $limit)) === NULL)
 121                                         break;
 122                                 $gourl = $wgTitle->getLocalURL("action=history&limit={$limit}&offset=".
 123                                                 wfTimestamp(TS_MW, $lastid));
 124                                 break;
 125                         }
 126
 127                         if (!is_null($gourl)) {
 128                                 $wgOut->redirect($gourl);
 129                                 return;
 130                         }
 131                 }
 132
 133                 /*
 134                  * Fetch revisions.
 135                  *
 136                  * If the user clicked "previous", we retrieve the revisions backwards,
 137                  * then reverse them.  This is to avoid needing to know the timestamp of
 138                  * previous revisions when generating the URL.
 139                  */
 140                 $direction = $this->getDirection();
 141                 $revisions = $this->fetchRevisions($limit, $dboffset, $direction);
 142                 $navbar = $this->makeNavbar($revisions, $offset, $limit, $direction);
 143
 144                 /*
 145                  * We fetch one more revision than needed to get the timestamp of the
 146                  * one after this page (and to know if it exists).
 147                  *
 148                  * linesonpage stores the actual number of lines.
 149                  */
 150                 if (count($revisions) < $limit + 1)
 151                         $this->linesonpage = count($revisions);
 152                 else
 153                         $this->linesonpage = count($revisions) - 1;
 154
 155                 /* Un-reverse revisions */
 156                 if ($direction == PageHistory::DIR_PREV)
 157                         $revisions = array_reverse($revisions);
 158
 159                 /*
 160                  * Print the top navbar.
 161                  */
 162                 $s = $navbar;
 163                 $s .= $this->beginHistoryList();
 164                 $counter = 1;
 165
 166                 /*
 167                  * Print each revision, excluding the one-past-the-end, if any.
 168                  */
 169                 foreach (array_slice($revisions, 0, $limit) as $i => $line) {
 170                         $latest = !$i && $offset == 0;
 171                         $firstInList = !$i;
 172                         $next = isset( $revisions[$i + 1] ) ? $revisions[$i + 1 ] : null;
 173                         $s .= $this->historyLine($line, $next, $counter, $this->getNotificationTimestamp(), $latest, $firstInList);
 174                         $counter++;
 175                 }
 176
 177                 /*
 178                  * End navbar.
 179                 */
 180                 $s .= $this->endHistoryList();
 181                 $s .= $navbar;
 182
 183                 $wgOut->addHTML( $s );
 184                 wfProfileOut( $fname );
 185         }
 186
 187         /** @todo document */
 188         function beginHistoryList() {
 189                 global $wgTitle;
 190                 $this->lastdate = '';
 191                 $s = wfMsgExt( 'histlegend', array( 'parse') );
 192                 $s .= '<form action="' . $wgTitle->escapeLocalURL( '-' ) . '" method="get">';
 193                 $prefixedkey = htmlspecialchars($wgTitle->getPrefixedDbKey());
 194
 195                 // The following line is SUPPOSED to have double-quotes around the
 196                 // $prefixedkey variable, because htmlspecialchars() doesn't escape
 197                 // single-quotes.
 198                 //
 199                 // On at least two occasions people have changed it to single-quotes,
 200                 // which creates invalid HTML and incorrect display of the resulting
 201                 // link.
 202                 //
 203                 // Please do not break this a third time. Thank you for your kind
 204                 // consideration and cooperation.
 205                 //
 206                 $s .= "<input type='hidden' name='title' value=\"{$prefixedkey}\" />\n";
 207
 208                 $s .= $this->submitButton();
 209                 $s .= '<ul id="pagehistory">' . "\n";
 210                 return $s;
 211         }
 212
 213         /** @todo document */
 214         function endHistoryList() {
 215                 $s = '</ul>';
 216                 $s .= $this->submitButton( array( 'id' => 'historysubmit' ) );
 217                 $s .= '</form>';
 218                 return $s;
 219         }
 220
 221         /** @todo document */
 222         function submitButton( $bits = array() ) {
 223                 return ( $this->linesonpage > 0 )
 224                         ? wfElement( 'input', array_merge( $bits,
 225                                 array(
 226                                         'class'     => 'historysubmit',
 227                                         'type'      => 'submit',
 228                                         'accesskey' => wfMsg( 'accesskey-compareselectedversions' ),
 229                                         'title'     => wfMsg( 'tooltip-compareselectedversions' ),
 230                                         'value'     => wfMsg( 'compareselectedversions' ),
 231                                 ) ) )
 232                         : '';
 233         }
 234
 235         /** @todo document */
 236         function historyLine( $row, $next, $counter = '', $notificationtimestamp = false, $latest = false, $firstInList = false ) {
 237                 global $wgUser;
 238                 $rev = new Revision( $row );
 239                 $rev->setTitle( $this->mTitle );
 240
 241                 $s = '<li>';
 242                 $curlink = $this->curLink( $rev, $latest );
 243                 $lastlink = $this->lastLink( $rev, $next, $counter );
 244                 $arbitrary = $this->diffButtons( $rev, $firstInList, $counter );
 245                 $link = $this->revLink( $rev );
 246                 $user = $this->mSkin->revUserLink( $rev );
 247
 248                 $s .= "($curlink) ($lastlink) $arbitrary";
 249
 250                 if( $wgUser->isAllowed( 'deleterevision' ) ) {
 251                         $revdel = Title::makeTitle( NS_SPECIAL, 'Revisiondelete' );
 252                         if( $firstInList ) {
 253                                 // We don't currently handle well changing the top revision's settings
 254                                 $del = wfMsgHtml( 'rev-delundel' );
 255                         } else {
 256                                 $del = $this->mSkin->makeKnownLinkObj( $revdel,
 257                                         wfMsg( 'rev-delundel' ),
 258                                         'target=' . urlencode( $this->mTitle->getPrefixedDbkey() ) .
 259                                         '&oldid=' . urlencode( $rev->getId() ) );
 260                         }
 261                         $s .= "(<small>$del</small>) ";
 262                 }
 263
 264                 $s .= " $link <span class='history-user'>$user</span>";
 265
 266                 if( $row->rev_minor_edit ) {
 267                         $s .= ' ' . wfElement( 'span', array( 'class' => 'minor' ), wfMsg( 'minoreditletter') );
 268                 }
 269
 270                 $s .= $this->mSkin->revComment( $rev );
 271                 if ($notificationtimestamp && ($row->rev_timestamp >= $notificationtimestamp)) {
 272                         $s .= ' <span class="updatedmarker">' .  wfMsgHtml( 'updatedmarker' ) . '</span>';
 273                 }
 274                 if( $row->rev_deleted & Revision::DELETED_TEXT ) {
 275                         $s .= ' ' . wfMsgHtml( 'deletedrev' );
 276                 }
 277                 $s .= "</li>\n";
 278
 279                 return $s;
 280         }
 281
 282         /** @todo document */
 283         function revLink( $rev ) {
 284                 global $wgLang;
 285                 $date = $wgLang->timeanddate( wfTimestamp(TS_MW, $rev->getTimestamp()), true );
 286                 if( $rev->userCan( Revision::DELETED_TEXT ) ) {
 287                         $link = $this->mSkin->makeKnownLinkObj(
 288                                 $this->mTitle, $date, "oldid=" . $rev->getId() );
 289                 } else {
 290                         $link = $date;
 291                 }
 292                 if( $rev->isDeleted( Revision::DELETED_TEXT ) ) {
 293                         return '<span class="history-deleted">' . $link . '</span>';
 294                 }
 295                 return $link;
 296         }
 297
 298         /** @todo document */
 299         function curLink( $rev, $latest ) {
 300                 $cur = wfMsgExt( 'cur', array( 'escape') );
 301                 if( $latest || !$rev->userCan( Revision::DELETED_TEXT ) ) {
 302                         return $cur;
 303                 } else {
 304                         return $this->mSkin->makeKnownLinkObj(
 305                                 $this->mTitle, $cur,
 306                                 'diff=' . $this->getLatestID() .
 307                                 "&oldid=" . $rev->getId() );
 308                 }
 309         }
 310
 311         /** @todo document */
 312         function lastLink( $rev, $next, $counter ) {
 313                 $last = wfMsgExt( 'last', array( 'escape' ) );
 314                 if( is_null( $next ) ) {
 315                         if( $rev->getTimestamp() == $this->getEarliestOffset() ) {
 316                                 return $last;
 317                         } else {
 318                                 // Cut off by paging; there are more behind us...
 319                                 return $this->mSkin->makeKnownLinkObj(
 320                                         $this->mTitle,
 321                                         $last,
 322                                         "diff=" . $rev->getId() . "&oldid=prev" );
 323                         }
 324                 } elseif( !$rev->userCan( Revision::DELETED_TEXT ) ) {
 325                         return $last;
 326                 } else {
 327                         return $this->mSkin->makeKnownLinkObj(
 328                                 $this->mTitle,
 329                                 $last,
 330                                 "diff=" . $rev->getId() . "&oldid={$next->rev_id}"
 331                                 /*,
 332                                 '',
 333                                 '',
 334                                 "tabindex={$counter}"*/ );
 335                 }
 336         }
 337
 338         /** @todo document */
 339         function diffButtons( $rev, $firstInList, $counter ) {
 340                 if( $this->linesonpage > 1) {
 341                         $radio = array(
 342                                 'type'  => 'radio',
 343                                 'value' => $rev->getId(),
 344 # do we really need to flood this on every item?
 345 #                               'title' => wfMsgHtml( 'selectolderversionfordiff' )
 346                         );
 347
 348                         if( !$rev->userCan( Revision::DELETED_TEXT ) ) {
 349                                 $radio['disabled'] = 'disabled';
 350                         }
 351
 352                         /** @todo: move title texts to javascript */
 353                         if ( $firstInList ) {
 354                                 $first = wfElement( 'input', array_merge(
 355                                         $radio,
 356                                         array(
 357                                                 'style' => 'visibility:hidden',
 358                                                 'name'  => 'oldid' ) ) );
 359                                 $checkmark = array( 'checked' => 'checked' );
 360                         } else {
 361                                 if( $counter == 2 ) {
 362                                         $checkmark = array( 'checked' => 'checked' );
 363                                 } else {
 364                                         $checkmark = array();
 365                                 }
 366                                 $first = wfElement( 'input', array_merge(
 367                                         $radio,
 368                                         $checkmark,
 369                                         array( 'name'  => 'oldid' ) ) );
 370                                 $checkmark = array();
 371                         }
 372                         $second = wfElement( 'input', array_merge(
 373                                 $radio,
 374                                 $checkmark,
 375                                 array( 'name'  => 'diff' ) ) );
 376                         return $first . $second;
 377                 } else {
 378                         return '';
 379                 }
 380         }
 381
 382         /** @todo document */
 383         function getLatestOffset( $id = null ) {
 384                 if ( $id === null) $id = $this->mTitle->getArticleID();
 385                 return $this->getExtremeOffset( $id, 'max' );
 386         }
 387
 388         /** @todo document */
 389         function getEarliestOffset( $id = null ) {
 390                 if ( $id === null) $id = $this->mTitle->getArticleID();
 391                 return $this->getExtremeOffset( $id, 'min' );
 392         }
 393
 394         /** @todo document */
 395         function getExtremeOffset( $id, $func ) {
 396                 $db =& wfGetDB(DB_SLAVE);
 397                 return $db->selectField( 'revision',
 398                         "$func(rev_timestamp)",
 399                         array( 'rev_page' => $id ),
 400                         'PageHistory::getExtremeOffset' );
 401         }
 402
 403         /** @todo document */
 404         function getLatestId() {
 405                 if( is_null( $this->mLatestId ) ) {
 406                         $id = $this->mTitle->getArticleID();
 407                         $db =& wfGetDB(DB_SLAVE);
 408                         $this->mLatestId = $db->selectField( 'revision',
 409                                 "max(rev_id)",
 410                                 array( 'rev_page' => $id ),
 411                                 'PageHistory::getLatestID' );
 412                 }
 413                 return $this->mLatestId;
 414         }
 415
 416         /** @todo document */
 417         function getLastOffsetForPaging( $id, $step ) {
 418                 $fname = 'PageHistory::getLastOffsetForPaging';
 419
 420                 $dbr =& wfGetDB(DB_SLAVE);
 421                 $res = $dbr->select(
 422                         'revision',
 423                         'rev_timestamp',
 424                         "rev_page=$id",
 425                         $fname,
 426                         array('ORDER BY' => 'rev_timestamp ASC', 'LIMIT' => $step));
 427
 428                 $n = $dbr->numRows( $res );
 429                 $last = null;
 430                 while( $obj = $dbr->fetchObject( $res ) ) {
 431                         $last = $obj->rev_timestamp;
 432                 }
 433                 $dbr->freeResult( $res );
 434                 return $last;
 435         }
 436
 437         /**
 438          * @return returns the direction of browsing watchlist
 439          */
 440         function getDirection() {
 441                 global $wgRequest;
 442                 if ($wgRequest->getText("dir") == "prev")
 443                         return PageHistory::DIR_PREV;
 444                 else
 445                         return PageHistory::DIR_NEXT;
 446         }
 447
 448         /** @todo document */
 449         function fetchRevisions($limit, $offset, $direction) {
 450                 $fname = 'PageHistory::fetchRevisions';
 451
 452                 $dbr =& wfGetDB( DB_SLAVE );
 453
 454                 if ($direction == PageHistory::DIR_PREV)
 455                         list($dirs, $oper) = array("ASC", ">=");
 456                 else /* $direction == PageHistory::DIR_NEXT */
 457                         list($dirs, $oper) = array("DESC", "<=");
 458
 459                 if ($offset)
 460                         $offsets = array("rev_timestamp $oper '$offset'");
 461                 else
 462                         $offsets = array();
 463
 464                 $page_id = $this->mTitle->getArticleID();
 465
 466                 $res = $dbr->select(
 467                         'revision',
 468                         array('rev_id', 'rev_page', 'rev_text_id', 'rev_user', 'rev_comment', 'rev_user_text',
 469                                 'rev_timestamp', 'rev_minor_edit', 'rev_deleted'),
 470                         array_merge(array("rev_page=$page_id"), $offsets),
 471                         $fname,
 472                         array('ORDER BY' => "rev_timestamp $dirs",
 473                                 'USE INDEX' => 'page_timestamp', 'LIMIT' => $limit)
 474                         );
 475
 476                 $result = array();
 477                 while (($obj = $dbr->fetchObject($res)) != NULL)
 478                         $result[] = $obj;
 479
 480                 return $result;
 481         }
 482
 483         /** @todo document */
 484         function getNotificationTimestamp() {
 485                 global $wgUser, $wgShowUpdatedMarker;
 486                 $fname = 'PageHistory::getNotficationTimestamp';
 487
 488                 if ($this->mNotificationTimestamp !== NULL)
 489                         return $this->mNotificationTimestamp;
 490
 491                 if ($wgUser->isAnon() || !$wgShowUpdatedMarker)
 492                         return $this->mNotificationTimestamp = false;
 493
 494                 $dbr =& wfGetDB(DB_SLAVE);
 495
 496                 $this->mNotificationTimestamp = $dbr->selectField(
 497                         'watchlist',
 498                         'wl_notificationtimestamp',
 499                         array(  'wl_namespace' => $this->mTitle->getNamespace(),
 500                                 'wl_title' => $this->mTitle->getDBkey(),
 501                                 'wl_user' => $wgUser->getID()
 502                         ),
 503                         $fname);
 504
 505                 // Don't use the special value reserved for telling whether the field is filled
 506                 if ( is_null( $this->mNotificationTimestamp ) ) {
 507                         $this->mNotificationTimestamp = false;
 508                 }
 509
 510                 return $this->mNotificationTimestamp;
 511         }
 512
 513         /** @todo document */
 514         function makeNavbar($revisions, $offset, $limit, $direction) {
 515                 global $wgLang;
 516
 517                 $revisions = array_slice($revisions, 0, $limit);
 518
 519                 $latestTimestamp = wfTimestamp(TS_MW, $this->getLatestOffset());
 520                 $earliestTimestamp = wfTimestamp(TS_MW, $this->getEarliestOffset());
 521
 522                 /*
 523                  * When we're displaying previous revisions, we need to reverse
 524                  * the array, because it's queried in reverse order.
 525                  */
 526                 if ($direction == PageHistory::DIR_PREV)
 527                         $revisions = array_reverse($revisions);
 528
 529                 /*
 530                  * lowts is the timestamp of the first revision on this page.
 531                  * hights is the timestamp of the last revision.
 532                  */
 533
 534                 $lowts = $hights = 0;
 535
 536                 if( count( $revisions ) ) {
 537                         $latestShown = wfTimestamp(TS_MW, $revisions[0]->rev_timestamp);
 538                         $earliestShown = wfTimestamp(TS_MW, $revisions[count($revisions) - 1]->rev_timestamp);
 539                 } else {
 540                         $latestShown = null;
 541                         $earliestShown = null;
 542                 }
 543
 544                 /* Don't announce the limit everywhere if it's the default */
 545                 $usefulLimit = $limit == $this->defaultLimit ? '' : $limit;
 546
 547                 $urls = array();
 548                 foreach (array(20, 50, 100, 250, 500) as $num) {
 549                         $urls[] = $this->MakeLink( $wgLang->formatNum($num),
 550                                 array('offset' => $offset == 0 ? '' : wfTimestamp(TS_MW, $offset), 'limit' => $num, ) );
 551                 }
 552
 553                 $bits = implode($urls, ' | ');
 554
 555                 wfDebug("latestShown=$latestShown latestTimestamp=$latestTimestamp\n");
 556                 if( $latestShown < $latestTimestamp ) {
 557                         $prevtext = $this->MakeLink( wfMsgHtml("prevn", $limit),
 558                                 array( 'dir' => 'prev', 'offset' => $latestShown, 'limit' => $usefulLimit ) );
 559                         $lasttext = $this->MakeLink( wfMsgHtml('histlast'),
 560                                 array( 'limit' => $usefulLimit ) );
 561                 } else {
 562                         $prevtext = wfMsgHtml("prevn", $limit);
 563                         $lasttext = wfMsgHtml('histlast');
 564                 }
 565
 566                 wfDebug("earliestShown=$earliestShown earliestTimestamp=$earliestTimestamp\n");
 567                 if( $earliestShown > $earliestTimestamp ) {
 568                         $nexttext = $this->MakeLink( wfMsgHtml("nextn", $limit),
 569                                 array( 'offset' => $earliestShown, 'limit' => $usefulLimit ) );
 570                         $firsttext = $this->MakeLink( wfMsgHtml('histfirst'),
 571                                 array( 'go' => 'first', 'limit' => $usefulLimit ) );
 572                 } else {
 573                         $nexttext = wfMsgHtml("nextn", $limit);
 574                         $firsttext = wfMsgHtml('histfirst');
 575                 }
 576
 577                 $firstlast = "($lasttext | $firsttext)";
 578
 579                 return "$firstlast " . wfMsgHtml("viewprevnext", $prevtext, $nexttext, $bits);
 580         }
 581
 582         function MakeLink($text, $query = NULL) {
 583                 if ( $query === null ) return $text;
 584                 return $this->mSkin->makeKnownLinkObj(
 585                                 $this->mTitle, $text,
 586                                 wfArrayToCGI( $query, array( 'action' => 'history' )));
 587         }
 588
 589
 590         /**
 591          * Output a subscription feed listing recent edits to this page.
 592          * @param string $type
 593          */
 594         function feed( $type ) {
 595                 require_once 'SpecialRecentchanges.php';
 596
 597                 global $wgFeedClasses;
 598                 if( !isset( $wgFeedClasses[$type] ) ) {
 599                         global $wgOut;
 600                         $wgOut->addWikiText( wfMsg( 'feed-invalid' ) );
 601                         return;
 602                 }
 603
 604                 $feed = new $wgFeedClasses[$type](
 605                         $this->mTitle->getPrefixedText() . ' - ' .
 606                                 wfMsgForContent( 'history-feed-title' ),
 607                         wfMsgForContent( 'history-feed-description' ),
 608                         $this->mTitle->getFullUrl( 'action=history' ) );
 609
 610                 $items = $this->fetchRevisions(10, 0, PageHistory::DIR_NEXT);
 611                 $feed->outHeader();
 612                 if( $items ) {
 613                         foreach( $items as $row ) {
 614                                 $feed->outItem( $this->feedItem( $row ) );
 615                         }
 616                 } else {
 617                         $feed->outItem( $this->feedEmpty() );
 618                 }
 619                 $feed->outFooter();
 620         }
 621
 622         function feedEmpty() {
 623                 global $wgOut;
 624                 return new FeedItem(
 625                         wfMsgForContent( 'nohistory' ),
 626                         $wgOut->parse( wfMsgForContent( 'history-feed-empty' ) ),
 627                         $this->mTitle->getFullUrl(),
 628                         wfTimestamp( TS_MW ),
 629                         '',
 630                         $this->mTitle->getTalkPage()->getFullUrl() );
 631         }
 632
 633         /**
 634          * Generate a FeedItem object from a given revision table row
 635          * Borrows Recent Changes' feed generation functions for formatting;
 636          * includes a diff to the previous revision (if any).
 637          *
 638          * @param $row
 639          * @return FeedItem
 640          */
 641         function feedItem( $row ) {
 642                 $rev = new Revision( $row );
 643                 $rev->setTitle( $this->mTitle );
 644                 $text = rcFormatDiffRow( $this->mTitle,
 645                         $this->mTitle->getPreviousRevisionID( $rev->getId() ),
 646                         $rev->getId(),
 647                         $rev->getTimestamp(),
 648                         $rev->getComment() );
 649
 650                 if( $rev->getComment() == '' ) {
 651                         global $wgContLang;
 652                         $title = wfMsgForContent( 'history-feed-item-nocomment',
 653                                 $rev->getUserText(),
 654                                 $wgContLang->timeanddate( $rev->getTimestamp() ) );
 655                 } else {
 656                         $title = $rev->getUserText() . ": " . $this->stripComment( $rev->getComment() );
 657                 }
 658
 659                 return new FeedItem(
 660                         $title,
 661                         $text,
 662                         $this->mTitle->getFullUrl( 'diff=' . $rev->getId() . '&oldid=prev' ),
 663                         $rev->getTimestamp(),
 664                         $rev->getUserText(),
 665                         $this->mTitle->getTalkPage()->getFullUrl() );
 666         }
 667
 668         /**
 669          * Quickie hack... strip out wikilinks to more legible form from the comment.
 670          */
 671         function stripComment( $text ) {
 672                 return preg_replace( '/\[\[([^]]*\|)?([^]]+)\]\]/', '\2', $text );
 673         }
 674
 675
 676 }
 677
 678 ?>