includes/PageHistory.php

   1 <?php
   2 /**
   3  * Page history
   4  *
   5  * Split off from Article.php and Skin.php, 2003-12-22
   6  * @file
   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  */
  18 class PageHistory {
  19         const DIR_PREV = 0;
  20         const DIR_NEXT = 1;
  21
  22         var $mArticle, $mTitle, $mSkin;
  23         var $lastdate;
  24         var $linesonpage;
  25         var $mNotificationTimestamp;
  26         var $mLatestId = null;
  27
  28         /**
  29          * Construct a new PageHistory.
  30          *
  31          * @param Article $article
  32          * @returns nothing
  33          */
  34         function __construct($article) {
  35                 global $wgUser;
  36
  37                 $this->mArticle =& $article;
  38                 $this->mTitle =& $article->mTitle;
  39                 $this->mNotificationTimestamp = NULL;
  40                 $this->mSkin = $wgUser->getSkin();
  41                 $this->preCacheMessages();
  42         }
  43
  44         function getArticle() {
  45                 return $this->mArticle;
  46         }
  47
  48         function getTitle() {
  49                 return $this->mTitle;
  50         }
  51
  52         /**
  53          * As we use the same small set of messages in various methods and that
  54          * they are called often, we call them once and save them in $this->message
  55          */
  56         function preCacheMessages() {
  57                 // Precache various messages
  58                 if( !isset( $this->message ) ) {
  59                         foreach( explode(' ', 'cur last rev-delundel' ) as $msg ) {
  60                                 $this->message[$msg] = wfMsgExt( $msg, array( 'escape') );
  61                         }
  62                 }
  63         }
  64
  65         /**
  66          * Print the history page for an article.
  67          *
  68          * @returns nothing
  69          */
  70         function history() {
  71                 global $wgOut, $wgRequest, $wgTitle, $wgScript;
  72
  73                 /*
  74                  * Allow client caching.
  75                  */
  76                 if( $wgOut->checkLastModified( $this->mArticle->getTouched() ) )
  77                 /* Client cache fresh and headers sent, nothing more to do. */
  78                 return;
  79
  80                 wfProfileIn( __METHOD__ );
  81
  82                 /*
  83                  * Setup page variables.
  84                  */
  85                 $wgOut->setPageTitle( wfMsg( 'history-title', $this->mTitle->getPrefixedText() ) );
  86                 $wgOut->setPageTitleActionText( wfMsg( 'history_short' ) );
  87                 $wgOut->setArticleFlag( false );
  88                 $wgOut->setArticleRelated( true );
  89                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
  90                 $wgOut->setSyndicated( true );
  91                 $wgOut->setFeedAppendQuery( 'action=history' );
  92                 $wgOut->addScriptFile( 'history.js' );
  93
  94                 $logPage = SpecialPage::getTitleFor( 'Log' );
  95                 $logLink = $this->mSkin->makeKnownLinkObj( $logPage, wfMsgHtml( 'viewpagelogs' ), 'page=' . $this->mTitle->getPrefixedUrl() );
  96                 $wgOut->setSubtitle( $logLink );
  97
  98                 $feedType = $wgRequest->getVal( 'feed' );
  99                 if( $feedType ) {
 100                         wfProfileOut( __METHOD__ );
 101                         return $this->feed( $feedType );
 102                 }
 103
 104                 /*
 105                  * Fail if article doesn't exist.
 106                  */
 107                 if( !$this->mTitle->exists() ) {
 108                         $wgOut->addWikiMsg( 'nohistory' );
 109                         wfProfileOut( __METHOD__ );
 110                         return;
 111                 }
 112
 113                 /*
 114                  * "go=first" means to jump to the last (earliest) history page.
 115                  * This is deprecated, it no longer appears in the user interface
 116                  */
 117                 if ( $wgRequest->getText("go") == 'first' ) {
 118                         $limit = $wgRequest->getInt( 'limit', 50 );
 119                         global $wgFeedLimit;
 120                         if( $limit > $wgFeedLimit ) {
 121                                 $limit = $wgFeedLimit;
 122                         }
 123                         $wgOut->redirect( $wgTitle->getLocalURL( "action=history&limit={$limit}&dir=prev" ) );
 124                         return;
 125                 }
 126
 127                 /**
 128                  * Add date selector to quickly get to a certain time
 129                  */
 130                 $year = $wgRequest->getInt( 'year' );
 131                 $month = $wgRequest->getInt( 'month' );
 132
 133                 $action = htmlspecialchars( $wgScript );
 134                 $wgOut->addHTML(
 135                 Xml::fieldset( wfMsg( 'history-search' ), false, array( 'id' => 'mw-history-search' ) ) .
 136                         "<form action=\"$action\" method=\"get\">" .
 137                 Xml::hidden( 'title', $this->mTitle->getPrefixedDBKey() ) . "\n" .
 138                 Xml::hidden( 'action', 'history' ) . "\n" .
 139                 $this->getDateMenu( $year, $month ) . '&nbsp;' .
 140                 Xml::submitButton( wfMsg( 'allpagessubmit' ) ) . "\n" .
 141                         '</form></fieldset>'
 142                         );
 143
 144                         wfRunHooks( 'PageHistoryBeforeList', array( &$this->mArticle ) );
 145
 146                         /**
 147                          * Do the list
 148                          */
 149                         $pager = new PageHistoryPager( $this, $year, $month );
 150                         $this->linesonpage = $pager->getNumRows();
 151                         $wgOut->addHTML(
 152                         $pager->getNavigationBar() .
 153                         $this->beginHistoryList() .
 154                         $pager->getBody() .
 155                         $this->endHistoryList() .
 156                         $pager->getNavigationBar()
 157                         );
 158                         wfProfileOut( __METHOD__ );
 159         }
 160
 161         /**
 162          * @return string Formatted HTML
 163          * @param int $year
 164          * @param int $month
 165          */
 166         private function getDateMenu( $year, $month ) {
 167                 # Offset overrides year/month selection
 168                 if( $month && $month !== -1 ) {
 169                         $encMonth = intval( $month );
 170                 } else {
 171                         $encMonth = '';
 172                 }
 173                 if ( $year ) {
 174                         $encYear = intval( $year );
 175                 } else if( $encMonth ) {
 176                         $thisMonth = intval( gmdate( 'n' ) );
 177                         $thisYear = intval( gmdate( 'Y' ) );
 178                         if( intval($encMonth) > $thisMonth ) {
 179                                 $thisYear--;
 180                         }
 181                         $encYear = $thisYear;
 182                 } else {
 183                         $encYear = '';
 184                 }
 185                 return Xml::label( wfMsg( 'year' ), 'year' ) . ' '.
 186                 Xml::input( 'year', 4, $encYear, array('id' => 'year', 'maxlength' => 4) ) .
 187                         ' '.
 188                 Xml::label( wfMsg( 'month' ), 'month' ) . ' '.
 189                 Xml::monthSelector( $encMonth, -1 );
 190         }
 191
 192         /**
 193          * Creates begin of history list with a submit button
 194          *
 195          * @return string HTML output
 196          */
 197         function beginHistoryList() {
 198                 global $wgTitle, $wgScript, $wgEnableHtmlDiff;
 199                 $this->lastdate = '';
 200                 $s = wfMsgExt( 'histlegend', array( 'parse') );
 201                 $s .= Xml::openElement( 'form', array( 'action' => $wgScript ) );
 202                 $s .= Xml::hidden( 'title', $wgTitle->getPrefixedDbKey() );
 203                 if($wgEnableHtmlDiff){
 204                         $s .= Xml::hidden( 'htmldiff', 0 , array('id' => 'htmldiff'));
 205                         $s .= $this->submitButton( wfMsg( 'visualcomparison'),
 206                         array(
 207                                         'id' => 'submithtmldiff1',
 208                                         'class'     => 'historysubmit',
 209                                         'accesskey' => wfMsg( 'accesskey-visualcomparison' ),
 210                                         'title'     => wfMsg( 'tooltip-compareselectedversions' ),
 211                         )
 212                         );
 213                         $s .= $this->submitButton( wfMsg( 'wikicodecomparison'),
 214                         array(
 215                                         'id' => 'submitsourcediff1',
 216                                         'class'     => 'historysubmit',
 217                                         'accesskey' => wfMsg( 'accesskey-compareselectedversions' ),
 218                                         'title'     => wfMsg( 'tooltip-compareselectedversions' ),
 219                         )
 220                         );
 221                 }else{
 222                         $s .= $this->submitButton( wfMsg( 'compareselectedversions'),
 223                         array(
 224                                         'class'     => 'historysubmit',
 225                                         'accesskey' => wfMsg( 'accesskey-compareselectedversions' ),
 226                                         'title'     => wfMsg( 'tooltip-compareselectedversions' ),
 227                         )
 228                         );
 229                 }
 230                 $s .= '<ul id="pagehistory">' . "\n";
 231                 return $s;
 232         }
 233
 234         /**
 235          * Creates end of history list with a submit button
 236          *
 237          * @return string HTML output
 238          */
 239         function endHistoryList() {
 240                 global $wgEnableHtmlDiff;
 241                 $s = '</ul>';
 242                 if($wgEnableHtmlDiff){
 243                         $s .= $this->submitButton( wfMsg( 'visualcomparison'),
 244                         array(
 245                                         'id' => 'submithtmldiff2',
 246                                         'class'     => 'historysubmit',
 247                                         'accesskey' => wfMsg( 'accesskey-visualcomparison' ),
 248                                         'title'     => wfMsg( 'tooltip-compareselectedversions' ),
 249                         )
 250                         );
 251                         $s .= $this->submitButton( wfMsg( 'wikicodecomparison'),
 252                         array(
 253                                         'id' => 'submitsourcediff2',
 254                                         'class'     => 'historysubmit',
 255                                         'accesskey' => wfMsg( 'accesskey-compareselectedversions' ),
 256                                         'title'     => wfMsg( 'tooltip-compareselectedversions' ),
 257                         )
 258                         );
 259                 }else{
 260                         $s .= $this->submitButton( wfMsg( 'compareselectedversions'),
 261                         array(
 262                                         'class'     => 'historysubmit',
 263                                         'accesskey' => wfMsg( 'accesskey-compareselectedversions' ),
 264                                         'title'     => wfMsg( 'tooltip-compareselectedversions' ),
 265                         )
 266                         );
 267                 }
 268                 $s .= '</form>';
 269                 return $s;
 270         }
 271
 272         /**
 273          * Creates a submit button
 274          *
 275          * @param array $attributes attributes
 276          * @return string HTML output for the submit button
 277          */
 278         function submitButton($message, $attributes = array() ) {
 279                 # Disable submit button if history has 1 revision only
 280                 if ( $this->linesonpage > 1 ) {
 281                         return Xml::submitButton( $message , $attributes );
 282                 } else {
 283                         return '';
 284                 }
 285         }
 286
 287         /**
 288          * Returns a row from the history printout.
 289          *
 290          * @todo document some more, and maybe clean up the code (some params redundant?)
 291          *
 292          * @param Row $row The database row corresponding to the previous line.
 293          * @param mixed $next The database row corresponding to the next line.
 294          * @param int $counter Apparently a counter of what row number we're at, counted from the top row = 1.
 295          * @param $notificationtimestamp
 296          * @param bool $latest Whether this row corresponds to the page's latest revision.
 297          * @param bool $firstInList Whether this row corresponds to the first displayed on this history page.
 298          * @return string HTML output for the row
 299          */
 300         function historyLine( $row, $next, $counter = '', $notificationtimestamp = false, $latest = false, $firstInList = false ) {
 301                 global $wgUser, $wgLang;
 302                 $rev = new Revision( $row );
 303                 $rev->setTitle( $this->mTitle );
 304
 305                 $s = '';
 306                 $curlink = $this->curLink( $rev, $latest );
 307                 $lastlink = $this->lastLink( $rev, $next, $counter );
 308                 $arbitrary = $this->diffButtons( $rev, $firstInList, $counter );
 309                 $link = $this->revLink( $rev );
 310
 311                 $s .= "($curlink) ($lastlink) $arbitrary";
 312
 313                 if( $wgUser->isAllowed( 'deleterevision' ) ) {
 314                         $revdel = SpecialPage::getTitleFor( 'Revisiondelete' );
 315                         if( $firstInList ) {
 316                                 // We don't currently handle well changing the top revision's settings
 317                                 $del = $this->message['rev-delundel'];
 318                         } else if( !$rev->userCan( Revision::DELETED_RESTRICTED ) ) {
 319                                 // If revision was hidden from sysops
 320                                 $del = $this->message['rev-delundel'];
 321                         } else {
 322                                 $del = $this->mSkin->makeKnownLinkObj( $revdel,
 323                                 $this->message['rev-delundel'],
 324                                         'target=' . urlencode( $this->mTitle->getPrefixedDbkey() ) .
 325                                         '&oldid=' . urlencode( $rev->getId() ) );
 326                                 // Bolden oversighted content
 327                                 if( $rev->isDeleted( Revision::DELETED_RESTRICTED ) )
 328                                 $del = "<strong>$del</strong>";
 329                         }
 330                         $s .= " <tt>(<small>$del</small>)</tt> ";
 331                 }
 332
 333                 $s .= " $link";
 334                 $s .= " <span class='history-user'>" . $this->mSkin->revUserTools( $rev, true ) . "</span>";
 335
 336                 if( $row->rev_minor_edit ) {
 337                         $s .= ' ' . Xml::element( 'span', array( 'class' => 'minor' ), wfMsg( 'minoreditletter') );
 338                 }
 339
 340                 if ( !is_null( $size = $rev->getSize() ) && $rev->userCan( Revision::DELETED_TEXT ) ) {
 341                         $s .= ' ' . $this->mSkin->formatRevisionSize( $size );
 342                 }
 343
 344                 $s .= $this->mSkin->revComment( $rev, false, true );
 345
 346                 if ($notificationtimestamp && ($row->rev_timestamp >= $notificationtimestamp)) {
 347                         $s .= ' <span class="updatedmarker">' .  wfMsgHtml( 'updatedmarker' ) . '</span>';
 348                 }
 349                 #add blurb about text having been deleted
 350                 if( $rev->isDeleted( Revision::DELETED_TEXT ) ) {
 351                         $s .= ' <tt>' . wfMsgHtml( 'deletedrev' ) . '</tt>';
 352                 }
 353
 354                 $tools = array();
 355
 356                 if ( !is_null( $next ) && is_object( $next ) ) {
 357                         if( !$this->mTitle->getUserPermissionsErrors( 'rollback', $wgUser )
 358                         && !$this->mTitle->getUserPermissionsErrors( 'edit', $wgUser )
 359                         && $latest ) {
 360                                 $tools[] = '<span class="mw-rollback-link">'
 361                                 . $this->mSkin->buildRollbackLink( $rev )
 362                                 . '</span>';
 363                         }
 364
 365                         if( $this->mTitle->quickUserCan( 'edit' ) &&
 366                         !$rev->isDeleted( Revision::DELETED_TEXT ) &&
 367                         !$next->rev_deleted & Revision::DELETED_TEXT ) {
 368                                 $undolink = $this->mSkin->makeKnownLinkObj(
 369                                 $this->mTitle,
 370                                 wfMsgHtml( 'editundo' ),
 371                                         'action=edit&undoafter=' . $next->rev_id . '&undo=' . $rev->getId()
 372                                 );
 373                                 $tools[] = "<span class=\"mw-history-undo\">{$undolink}</span>";
 374                         }
 375                 }
 376
 377                 if( $tools ) {
 378                         $s .= ' (' . implode( ' | ', $tools ) . ')';
 379                 }
 380
 381                 wfRunHooks( 'PageHistoryLineEnding', array( $this, &$row , &$s ) );
 382
 383                 return "<li>$s</li>\n";
 384         }
 385
 386         /**
 387          * Create a link to view this revision of the page
 388          * @param Revision $rev
 389          * @returns string
 390          */
 391         function revLink( $rev ) {
 392                 global $wgLang;
 393                 $date = $wgLang->timeanddate( wfTimestamp(TS_MW, $rev->getTimestamp()), true );
 394                 if( $rev->userCan( Revision::DELETED_TEXT ) ) {
 395                         $link = $this->mSkin->makeKnownLinkObj(
 396                         $this->mTitle, $date, "oldid=" . $rev->getId() );
 397                 } else {
 398                         $link = $date;
 399                 }
 400                 if( $rev->isDeleted( Revision::DELETED_TEXT ) ) {
 401                         return '<span class="history-deleted">' . $link . '</span>';
 402                 }
 403                 return $link;
 404         }
 405
 406         /**
 407          * Create a diff-to-current link for this revision for this page
 408          * @param Revision $rev
 409          * @param Bool $latest, this is the latest revision of the page?
 410          * @returns string
 411          */
 412         function curLink( $rev, $latest ) {
 413                 $cur = $this->message['cur'];
 414                 if( $latest || !$rev->userCan( Revision::DELETED_TEXT ) ) {
 415                         return $cur;
 416                 } else {
 417                         return $this->mSkin->makeKnownLinkObj(
 418                         $this->mTitle, $cur,
 419                                 'diff=' . $this->getLatestID() .
 420                                 "&oldid=" . $rev->getId() );
 421                 }
 422         }
 423
 424         /**
 425          * Create a diff-to-previous link for this revision for this page.
 426          * @param Revision $prevRev, the previous revision
 427          * @param mixed $next, the newer revision
 428          * @param int $counter, what row on the history list this is
 429          * @returns string
 430          */
 431         function lastLink( $prevRev, $next, $counter ) {
 432                 $last = $this->message['last'];
 433                 # $next may either be a Row, null, or "unkown"
 434                 $nextRev = is_object($next) ? new Revision( $next ) : $next;
 435                 if( is_null($next) ) {
 436                         # Probably no next row
 437                         return $last;
 438                 } elseif( $next === 'unknown' ) {
 439                         # Next row probably exists but is unknown, use an oldid=prev link
 440                         return $this->mSkin->makeKnownLinkObj(
 441                         $this->mTitle,
 442                         $last,
 443                                 "diff=" . $prevRev->getId() . "&oldid=prev" );
 444                 } elseif( !$prevRev->userCan(Revision::DELETED_TEXT) || !$nextRev->userCan(Revision::DELETED_TEXT) ) {
 445                         return $last;
 446                 } else {
 447                         return $this->mSkin->makeKnownLinkObj(
 448                         $this->mTitle,
 449                         $last,
 450                                 "diff=" . $prevRev->getId() . "&oldid={$next->rev_id}"
 451                         /*,
 452                                 '',
 453                                 '',
 454                                 "tabindex={$counter}"*/ );
 455                 }
 456         }
 457
 458         /**
 459          * Create radio buttons for page history
 460          *
 461          * @param object $rev Revision
 462          * @param bool $firstInList Is this version the first one?
 463          * @param int $counter A counter of what row number we're at, counted from the top row = 1.
 464          * @return string HTML output for the radio buttons
 465          */
 466         function diffButtons( $rev, $firstInList, $counter ) {
 467                 if( $this->linesonpage > 1) {
 468                         $radio = array(
 469                                 'type'  => 'radio',
 470                                 'value' => $rev->getId(),
 471                         );
 472
 473                         if( !$rev->userCan( Revision::DELETED_TEXT ) ) {
 474                                 $radio['disabled'] = 'disabled';
 475                         }
 476
 477                         /** @todo: move title texts to javascript */
 478                         if ( $firstInList ) {
 479                                 $first = Xml::element( 'input', array_merge(
 480                                 $radio,
 481                                 array(
 482                                                 'style' => 'visibility:hidden',
 483                                                 'name'  => 'oldid' ) ) );
 484                                 $checkmark = array( 'checked' => 'checked' );
 485                         } else {
 486                                 if( $counter == 2 ) {
 487                                         $checkmark = array( 'checked' => 'checked' );
 488                                 } else {
 489                                         $checkmark = array();
 490                                 }
 491                                 $first = Xml::element( 'input', array_merge(
 492                                 $radio,
 493                                 $checkmark,
 494                                 array( 'name'  => 'oldid' ) ) );
 495                                 $checkmark = array();
 496                         }
 497                         $second = Xml::element( 'input', array_merge(
 498                         $radio,
 499                         $checkmark,
 500                         array( 'name'  => 'diff' ) ) );
 501                         return $first . $second;
 502                 } else {
 503                         return '';
 504                 }
 505         }
 506
 507         /** @todo document */
 508         function getLatestId() {
 509                 if( is_null( $this->mLatestId ) ) {
 510                         $id = $this->mTitle->getArticleID();
 511                         $db = wfGetDB( DB_SLAVE );
 512                         $this->mLatestId = $db->selectField( 'page',
 513                                 "page_latest",
 514                         array( 'page_id' => $id ),
 515                         __METHOD__ );
 516                 }
 517                 return $this->mLatestId;
 518         }
 519
 520         /**
 521          * Fetch an array of revisions, specified by a given limit, offset and
 522          * direction. This is now only used by the feeds. It was previously
 523          * used by the main UI but that's now handled by the pager.
 524          */
 525         function fetchRevisions($limit, $offset, $direction) {
 526                 $dbr = wfGetDB( DB_SLAVE );
 527
 528                 if ($direction == PageHistory::DIR_PREV)
 529                 list($dirs, $oper) = array("ASC", ">=");
 530                 else /* $direction == PageHistory::DIR_NEXT */
 531                 list($dirs, $oper) = array("DESC", "<=");
 532
 533                 if ($offset)
 534                 $offsets = array("rev_timestamp $oper '$offset'");
 535                 else
 536                 $offsets = array();
 537
 538                 $page_id = $this->mTitle->getArticleID();
 539
 540                 return $dbr->select(
 541                         'revision',
 542                 Revision::selectFields(),
 543                 array_merge(array("rev_page=$page_id"), $offsets),
 544                 __METHOD__,
 545                 array('ORDER BY' => "rev_timestamp $dirs",
 546                                 'USE INDEX' => 'page_timestamp', 'LIMIT' => $limit)
 547                 );
 548         }
 549
 550         /** @todo document */
 551         function getNotificationTimestamp() {
 552                 global $wgUser, $wgShowUpdatedMarker;
 553
 554                 if ($this->mNotificationTimestamp !== NULL)
 555                 return $this->mNotificationTimestamp;
 556
 557                 if ($wgUser->isAnon() || !$wgShowUpdatedMarker)
 558                 return $this->mNotificationTimestamp = false;
 559
 560                 $dbr = wfGetDB(DB_SLAVE);
 561
 562                 $this->mNotificationTimestamp = $dbr->selectField(
 563                         'watchlist',
 564                         'wl_notificationtimestamp',
 565                 array(  'wl_namespace' => $this->mTitle->getNamespace(),
 566                                 'wl_title' => $this->mTitle->getDBkey(),
 567                                 'wl_user' => $wgUser->getId()
 568                 ),
 569                 __METHOD__ );
 570
 571                 // Don't use the special value reserved for telling whether the field is filled
 572                 if ( is_null( $this->mNotificationTimestamp ) ) {
 573                         $this->mNotificationTimestamp = false;
 574                 }
 575
 576                 return $this->mNotificationTimestamp;
 577         }
 578
 579         /**
 580          * Output a subscription feed listing recent edits to this page.
 581          * @param string $type
 582          */
 583         function feed( $type ) {
 584                 global $wgFeedClasses, $wgRequest, $wgFeedLimit;
 585                 if ( !FeedUtils::checkFeedOutput($type) ) {
 586                         return;
 587                 }
 588
 589                 $feed = new $wgFeedClasses[$type](
 590                 $this->mTitle->getPrefixedText() . ' - ' .
 591                 wfMsgForContent( 'history-feed-title' ),
 592                 wfMsgForContent( 'history-feed-description' ),
 593                 $this->mTitle->getFullUrl( 'action=history' ) );
 594
 595                 // Get a limit on number of feed entries. Provide a sane default
 596                 // of 10 if none is defined (but limit to $wgFeedLimit max)
 597                 $limit = $wgRequest->getInt( 'limit', 10 );
 598                 if( $limit > $wgFeedLimit || $limit < 1 ) {
 599                         $limit = 10;
 600                 }
 601                 $items = $this->fetchRevisions($limit, 0, PageHistory::DIR_NEXT);
 602
 603                 $feed->outHeader();
 604                 if( $items ) {
 605                         foreach( $items as $row ) {
 606                                 $feed->outItem( $this->feedItem( $row ) );
 607                         }
 608                 } else {
 609                         $feed->outItem( $this->feedEmpty() );
 610                 }
 611                 $feed->outFooter();
 612         }
 613
 614         function feedEmpty() {
 615                 global $wgOut;
 616                 return new FeedItem(
 617                 wfMsgForContent( 'nohistory' ),
 618                 $wgOut->parse( wfMsgForContent( 'history-feed-empty' ) ),
 619                 $this->mTitle->getFullUrl(),
 620                 wfTimestamp( TS_MW ),
 621                         '',
 622                 $this->mTitle->getTalkPage()->getFullUrl() );
 623         }
 624
 625         /**
 626          * Generate a FeedItem object from a given revision table row
 627          * Borrows Recent Changes' feed generation functions for formatting;
 628          * includes a diff to the previous revision (if any).
 629          *
 630          * @param $row
 631          * @return FeedItem
 632          */
 633         function feedItem( $row ) {
 634                 $rev = new Revision( $row );
 635                 $rev->setTitle( $this->mTitle );
 636                 $text = FeedUtils::formatDiffRow( $this->mTitle,
 637                 $this->mTitle->getPreviousRevisionID( $rev->getId() ),
 638                 $rev->getId(),
 639                 $rev->getTimestamp(),
 640                 $rev->getComment() );
 641
 642                 if( $rev->getComment() == '' ) {
 643                         global $wgContLang;
 644                         $title = wfMsgForContent( 'history-feed-item-nocomment',
 645                         $rev->getUserText(),
 646                         $wgContLang->timeanddate( $rev->getTimestamp() ) );
 647                 } else {
 648                         $title = $rev->getUserText() . ": " . $this->stripComment( $rev->getComment() );
 649                 }
 650
 651                 return new FeedItem(
 652                 $title,
 653                 $text,
 654                 $this->mTitle->getFullUrl( 'diff=' . $rev->getId() . '&oldid=prev' ),
 655                 $rev->getTimestamp(),
 656                 $rev->getUserText(),
 657                 $this->mTitle->getTalkPage()->getFullUrl() );
 658         }
 659
 660         /**
 661          * Quickie hack... strip out wikilinks to more legible form from the comment.
 662          */
 663         function stripComment( $text ) {
 664                 return preg_replace( '/\[\[([^]]*\|)?([^]]+)\]\]/', '\2', $text );
 665         }
 666 }
 667
 668
 669 /**
 670  * @ingroup Pager
 671  */
 672 class PageHistoryPager extends ReverseChronologicalPager {
 673         public $mLastRow = false, $mPageHistory;
 674
 675         function __construct( $pageHistory, $year='', $month='' ) {
 676                 parent::__construct();
 677                 $this->mPageHistory = $pageHistory;
 678                 $this->getDateCond( $year, $month );
 679         }
 680
 681         function getQueryInfo() {
 682                 $queryInfo = array(
 683                         'tables'  => array('revision'),
 684                         'fields'  => Revision::selectFields(),
 685                         'conds'   => array('rev_page' => $this->mPageHistory->mTitle->getArticleID() ),
 686                         'options' => array( 'USE INDEX' => array('revision' => 'page_timestamp') )
 687                 );
 688                 wfRunHooks( 'PageHistoryPager::getQueryInfo', array( &$this, &$queryInfo ) );
 689                 return $queryInfo;
 690         }
 691
 692         function getIndexField() {
 693                 return 'rev_timestamp';
 694         }
 695
 696         function formatRow( $row ) {
 697                 if ( $this->mLastRow ) {
 698                         $latest = $this->mCounter == 1 && $this->mIsFirst;
 699                         $firstInList = $this->mCounter == 1;
 700                         $s = $this->mPageHistory->historyLine( $this->mLastRow, $row, $this->mCounter++,
 701                         $this->mPageHistory->getNotificationTimestamp(), $latest, $firstInList );
 702                 } else {
 703                         $s = '';
 704                 }
 705                 $this->mLastRow = $row;
 706                 return $s;
 707         }
 708
 709         function getStartBody() {
 710                 $this->mLastRow = false;
 711                 $this->mCounter = 1;
 712                 return '';
 713         }
 714
 715         function getEndBody() {
 716                 if ( $this->mLastRow ) {
 717                         $latest = $this->mCounter == 1 && $this->mIsFirst;
 718                         $firstInList = $this->mCounter == 1;
 719                         if ( $this->mIsBackwards ) {
 720                                 # Next row is unknown, but for UI reasons, probably exists if an offset has been specified
 721                                 if ( $this->mOffset == '' ) {
 722                                         $next = null;
 723                                 } else {
 724                                         $next = 'unknown';
 725                                 }
 726                         } else {
 727                                 # The next row is the past-the-end row
 728                                 $next = $this->mPastTheEndRow;
 729                         }
 730                         $s = $this->mPageHistory->historyLine( $this->mLastRow, $next, $this->mCounter++,
 731                         $this->mPageHistory->getNotificationTimestamp(), $latest, $firstInList );
 732                 } else {
 733                         $s = '';
 734                 }
 735                 return $s;
 736         }
 737 }