includes/LogEventsList.php

   1 <?php
   2 # Copyright (C) 2004 Brion Vibber <brion@pobox.com>, 2008 Aaron Schulz
   3 # http://www.mediawiki.org/
   4 #
   5 # This program is free software; you can redistribute it and/or modify
   6 # it under the terms of the GNU General Public License as published by
   7 # the Free Software Foundation; either version 2 of the License, or
   8 # (at your option) any later version.
   9 #
  10 # This program is distributed in the hope that it will be useful,
  11 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13 # GNU General Public License for more details.
  14 #
  15 # You should have received a copy of the GNU General Public License along
  16 # with this program; if not, write to the Free Software Foundation, Inc.,
  17 # 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18 # http://www.gnu.org/copyleft/gpl.html
  19
  20 class LogEventsList {
  21         const NO_ACTION_LINK = 1;
  22
  23         private $skin;
  24         public $flags;
  25
  26         function __construct( &$skin, $flags = 0 ) {
  27                 $this->skin =& $skin;
  28                 $this->flags = $flags;
  29                 $this->preCacheMessages();
  30         }
  31
  32         /**
  33          * As we use the same small set of messages in various methods and that
  34          * they are called often, we call them once and save them in $this->message
  35          */
  36         private function preCacheMessages() {
  37                 // Precache various messages
  38                 if( !isset( $this->message ) ) {
  39                         $messages = 'revertmerge protect_change unblocklink revertmove undeletelink revdel-restore rev-delundel';
  40                         foreach( explode(' ', $messages ) as $msg ) {
  41                                 $this->message[$msg] = wfMsgExt( $msg, array( 'escape') );
  42                         }
  43                 }
  44         }
  45
  46         /**
  47          * Set page title and show header for this log type
  48          * @param OutputPage $out where to send output
  49          * @param strin $type
  50          */
  51         public function showHeader( $out, $type ) {
  52                 if( LogPage::isLogType( $type ) ) {
  53                         $out->setPageTitle( LogPage::logName( $type ) );
  54                         $out->addWikiText( LogPage::logHeader( $type ) );
  55                 }
  56         }
  57
  58         /**
  59          * Show options for the log list
  60          * @param OutputPage $out where to send output
  61          * @param string $type,
  62          * @param string $user,
  63          * @param string $page,
  64          * @param string $pattern
  65          */
  66         public function showOptions( $out, $type, $user, $page, $pattern ) {
  67                 global $wgScript, $wgMiserMode;
  68                 $action = htmlspecialchars( $wgScript );
  69                 $title = SpecialPage::getTitleFor( 'Log' );
  70                 $special = htmlspecialchars( $title->getPrefixedDBkey() );
  71                 $out->addHTML( "<form action=\"$action\" method=\"get\"><fieldset>" .
  72                         Xml::element( 'legend', array(), wfMsg( 'log' ) ) .
  73                         Xml::hidden( 'title', $special ) . "\n" .
  74                         $this->getTypeMenu( $type ) . "\n" .
  75                         $this->getUserInput( $user ) . "\n" .
  76                         $this->getTitleInput( $page ) . "\n" .
  77                         ( !$wgMiserMode ? ($this->getTitlePattern( $pattern )."\n") : "" ) .
  78                         Xml::submitButton( wfMsg( 'allpagessubmit' ) ) . "\n" .
  79                         "</fieldset></form>" );
  80         }
  81
  82         /**
  83          * @return string Formatted HTML
  84          */
  85         private function getTypeMenu( $queryType ) {
  86                 global $wgLogRestrictions, $wgUser;
  87
  88                 $out = "<select name='type'>\n";
  89
  90                 $validTypes = LogPage::validTypes();
  91                 $m = array(); // Temporary array
  92
  93                 // First pass to load the log names
  94                 foreach( $validTypes as $type ) {
  95                         $text = LogPage::logName( $type );
  96                         $m[$text] = $type;
  97                 }
  98
  99                 // Second pass to sort by name
 100                 ksort($m);
 101
 102                 // Third pass generates sorted XHTML content
 103                 foreach( $m as $text => $type ) {
 104                         $selected = ($type == $queryType);
 105                         // Restricted types
 106                         if ( isset($wgLogRestrictions[$type]) ) {
 107                                 if ( $wgUser->isAllowed( $wgLogRestrictions[$type] ) ) {
 108                                         $out .= Xml::option( $text, $type, $selected ) . "\n";
 109                                 }
 110                         } else {
 111                                 $out .= Xml::option( $text, $type, $selected ) . "\n";
 112                         }
 113                 }
 114
 115                 $out .= '</select>';
 116                 return $out;
 117         }
 118
 119         /**
 120          * @return string Formatted HTML
 121          */
 122         private function getUserInput( $user ) {
 123                 return Xml::inputLabel( wfMsg( 'specialloguserlabel' ), 'user', 'user', 12, $user );
 124         }
 125
 126         /**
 127          * @return string Formatted HTML
 128          */
 129         private function getTitleInput( $title ) {
 130                 return Xml::inputLabel( wfMsg( 'speciallogtitlelabel' ), 'page', 'page', 20, $title );
 131         }
 132
 133         /**
 134          * @return boolean Checkbox
 135          */
 136         private function getTitlePattern( $pattern ) {
 137                 return Xml::checkLabel( wfMsg( 'log-title-wildcard' ), 'pattern', 'pattern', $pattern );
 138         }
 139
 140
 141         protected function getWrapperElement() {
 142                 global $wgDateGroupedLogs;
 143                 return $wgDateGroupedLogs ? 'div' : 'ul';
 144         }
 145
 146         public function beginLogEventsList() {
 147                 return Xml::openElement( $this->getWrapperElement() ) . "\n";
 148         }
 149
 150         public function endLogEventsList() {
 151                 return Xml::closeElement( $this->getWrapperElement() ) . "\n";
 152         }
 153
 154                 /**
 155          * @param Row $row a single row from the result set
 156          * @return string Formatted HTML list item
 157          * @private
 158          */
 159         public function logLine( $row ) {
 160                 global $wgLang, $wgUser, $wgContLang;
 161
 162                 $title = Title::makeTitle( $row->log_namespace, $row->log_title );
 163                 $time = $wgLang->timeanddate( wfTimestamp(TS_MW, $row->log_timestamp), true );
 164                 // User links
 165                 if( self::isDeleted($row,LogPage::DELETED_USER) ) {
 166                         $userLink = '<span class="history-deleted">' . wfMsgHtml( 'rev-deleted-user' ) . '</span>';
 167                 } else {
 168                         $userLink = $this->skin->userLink( $row->log_user, $row->user_name );
 169                                 $this->skin->userToolLinks( $row->log_user, $row->user_name );
 170                 }
 171                 // Comment
 172                 if( self::isDeleted($row,LogPage::DELETED_COMMENT) ) {
 173                         $comment = '<span class="history-deleted">' . wfMsgHtml('rev-deleted-comment') . '</span>';
 174                 } else {
 175                         $comment = $wgContLang->getDirMark() . $this->skin->commentBlock( $row->log_comment );
 176                 }
 177                 // Extract extra parameters
 178                 $paramArray = LogPage::extractParams( $row->log_params );
 179                 $revert = $del = '';
 180                 // Some user can hide log items and have review links
 181                 if( $wgUser->isAllowed( 'deleterevision' ) ) {
 182                         $del = $this->showhideLinks( $row ) . ' ';
 183                 }
 184                 // Add review links and such...
 185                 if( !($this->flags & self::NO_ACTION_LINK) && !($row->log_deleted & LogPage::DELETED_ACTION) ) {
 186                         if( $row->log_type == 'move' && isset( $paramArray[0] ) && $wgUser->isAllowed( 'move' ) ) {
 187                                 $destTitle = Title::newFromText( $paramArray[0] );
 188                                 if( $destTitle ) {
 189                                         $revert = '(' . $this->skin->makeKnownLinkObj( SpecialPage::getTitleFor( 'Movepage' ),
 190                                                 $this->message['revertmove'],
 191                                                 'wpOldTitle=' . urlencode( $destTitle->getPrefixedDBkey() ) .
 192                                                 '&wpNewTitle=' . urlencode( $title->getPrefixedDBkey() ) .
 193                                                 '&wpReason=' . urlencode( wfMsgForContent( 'revertmove' ) ) .
 194                                                 '&wpMovetalk=0' ) . ')';
 195                                 }
 196                         // Show undelete link
 197                         } else if( $row->log_action == 'delete' && $wgUser->isAllowed( 'delete' ) ) {
 198                                 $revert = '(' . $this->skin->makeKnownLinkObj( SpecialPage::getTitleFor( 'Undelete' ),
 199                                         $this->message['undeletelink'], 'target='. urlencode( $title->getPrefixedDBkey() ) ) . ')';
 200                         // Show unblock link
 201                         } else if( $row->log_action == 'block' && $wgUser->isAllowed( 'block' ) ) {
 202                                 $revert = '(' .  $this->skin->makeKnownLinkObj( SpecialPage::getTitleFor( 'Ipblocklist' ),
 203                                         $this->message['unblocklink'],
 204                                         'action=unblock&ip=' . urlencode( $row->log_title ) ) . ')';
 205                         // Show change protection link
 206                         } else if( ( $row->log_action == 'protect' || $row->log_action == 'modify' ) && $wgUser->isAllowed( 'protect' ) ) {
 207                                 $revert = '(' .  $this->skin->makeKnownLinkObj( $title, $this->message['protect_change'], 'action=unprotect' ) . ')';
 208                         // Show unmerge link
 209                         } else if ( $row->log_action == 'merge' ) {
 210                                 $merge = SpecialPage::getTitleFor( 'Mergehistory' );
 211                                 $revert = '(' .  $this->skin->makeKnownLinkObj( $merge, $this->message['revertmerge'],
 212                                         wfArrayToCGI(
 213                                                 array('target' => $paramArray[0], 'dest' => $title->getPrefixedText(), 'mergepoint' => $paramArray[1] )
 214                                         )
 215                                 ) . ')';
 216                         // If an edit was hidden from a page give a review link to the history
 217                         } else if( $row->log_action == 'revision' && $wgUser->isAllowed( 'deleterevision' ) && isset($paramArray[2]) ) {
 218                                 $revdel = SpecialPage::getTitleFor( 'Revisiondelete' );
 219                                 // Different revision types use different URL params...
 220                                 $subtype = isset($paramArray[2]) ? $paramArray[1] : '';
 221                                 // Link to each hidden object ID, $paramArray[1] is the url param. List if several...
 222                                 $Ids = explode( ',', $paramArray[2] );
 223                                 if( count($Ids) == 1 ) {
 224                                         $revert = $this->skin->makeKnownLinkObj( $revdel, $this->message['revdel-restore'],
 225                                                 wfArrayToCGI( array('target' => $paramArray[0], $paramArray[1] => $Ids[0] ) ) );
 226                                 } else {
 227                                         $revert .= $this->message['revdel-restore'].':';
 228                                         foreach( $Ids as $n => $id ) {
 229                                                 $revert .= ' '.$this->skin->makeKnownLinkObj( $revdel, '#'.($n+1),
 230                                                         wfArrayToCGI( array('target' => $paramArray[0], $paramArray[1] => $id ) ) );
 231                                         }
 232                                 }
 233                                 $revert = "($revert)";
 234                         // Hidden log items, give review link
 235                         } else if( $row->log_action == 'event' && $wgUser->isAllowed( 'deleterevision' ) && isset($paramArray[0]) ) {
 236                                 $revdel = SpecialPage::getTitleFor( 'Revisiondelete' );
 237                                 $revert .= $this->message['revdel-restore'];
 238                                 $Ids = explode( ',', $paramArray[0] );
 239                                 // Link to each hidden object ID, $paramArray[1] is the url param. List if several...
 240                                 if( count($Ids) == 1 ) {
 241                                         $revert = $this->skin->makeKnownLinkObj( $revdel, $this->message['revdel-restore'],
 242                                                 wfArrayToCGI( array('logid' => $Ids[0] ) ) );
 243                                 } else {
 244                                         foreach( $Ids as $n => $id ) {
 245                                                 $revert .= $this->skin->makeKnownLinkObj( $revdel, '#'.($n+1),
 246                                                         wfArrayToCGI( array('logid' => $id ) ) );
 247                                         }
 248                                 }
 249                                 $revert = "($revert)";
 250                         } else {
 251                                 wfRunHooks( 'LogLine', array( $row->log_type, $row->log_action, $title, $paramArray,
 252                                         &$comment, &$revert, $row->log_timestamp ) );
 253                                 // wfDebug( "Invoked LogLine hook for " $row->log_type . ", " . $row->log_action . "\n" );
 254                                 // Do nothing. The implementation is handled by the hook modifiying the passed-by-ref parameters.
 255                         }
 256                 }
 257                 // Event description
 258                 if( self::isDeleted($row,LogPage::DELETED_ACTION) ) {
 259                         $action = '<span class="history-deleted">' . wfMsgHtml('rev-deleted-event') . '</span>';
 260                 } else {
 261                         $action = LogPage::actionText( $row->log_type, $row->log_action, $title, $this->skin, $paramArray, true );
 262                 }
 263
 264                 global $wgDateGroupedLogs;
 265                 if ( $wgDateGroupedLogs ) {
 266                         $time = $wgLang->time( wfTimestamp(TS_MW, $row->log_timestamp), true );
 267                         $date = $wgLang->date( wfTimestamp(TS_MW, $row->log_timestamp), true );
 268                         $line = Xml::tags('div', array( 'class' => 'mw-log-entry' ), "$del$time $userLink $action $comment $revert" );
 269
 270                         static $lastdate = false;
 271                         if ( $date !== $lastdate ) {
 272                                 $lastdate = $date;
 273                                 return Xml::element('h4', null, $date) . "\n" . $line;
 274                         } else {
 275                                 return $line;
 276                         }
 277                 } else {
 278                         return Xml::tags('li', null, "$del$time $userLink $action $comment $revert" );
 279                 }
 280
 281         }
 282
 283         /**
 284          * @param Row $row
 285          * @private
 286          */
 287         private function showhideLinks( $row ) {
 288                 global $wgAllowLogDeletion;
 289
 290                 if( !$wgAllowLogDeletion )
 291                         return "";
 292
 293                 $revdel = SpecialPage::getTitleFor( 'Revisiondelete' );
 294                 // If event was hidden from sysops
 295                 if( !self::userCan( $row, LogPage::DELETED_RESTRICTED ) ) {
 296                         $del = $this->message['rev-delundel'];
 297                 } else if( $row->log_type == 'suppress' ) {
 298                         // No one should be hiding from the oversight log
 299                         $del = $this->message['rev-delundel'];
 300                 } else {
 301                         $del = $this->skin->makeKnownLinkObj( $revdel, $this->message['rev-delundel'], 'logid='.$row->log_id );
 302                         // Bolden oversighted content
 303                         if( self::isDeleted( $row, LogPage::DELETED_RESTRICTED ) )
 304                                 $del = "<strong>$del</strong>";
 305                 }
 306                 return "<tt>(<small>$del</small>)</tt>";
 307         }
 308
 309         /**
 310          * Determine if the current user is allowed to view a particular
 311          * field of this log row, if it's marked as deleted.
 312          * @param Row $row
 313          * @param int $field
 314          * @return bool
 315          */
 316         public static function userCan( $row, $field ) {
 317                 if( ( $row->log_deleted & $field ) == $field ) {
 318                         global $wgUser;
 319                         $permission = ( $row->log_deleted & LogPage::DELETED_RESTRICTED ) == LogPage::DELETED_RESTRICTED
 320                                 ? 'hiderevision'
 321                                 : 'deleterevision';
 322                         wfDebug( "Checking for $permission due to $field match on $row->log_deleted\n" );
 323                         return $wgUser->isAllowed( $permission );
 324                 } else {
 325                         return true;
 326                 }
 327         }
 328
 329         /**
 330          * @param Row $row
 331          * @param int $field one of DELETED_* bitfield constants
 332          * @return bool
 333          */
 334         public static function isDeleted( $row, $field ) {
 335                 return ($row->log_deleted & $field) == $field;
 336         }
 337
 338         /**
 339          * Quick function to show a short log extract
 340          * @param OutputPage $out
 341          * @param string $type
 342          * @param string $page
 343          * @param string $user
 344          */
 345          public static function showLogExtract( $out, $type='', $page='', $user='' ) {
 346                 global $wgUser;
 347                 # Insert list of top 50 or so items
 348                 $loglist = new LogEventsList( $wgUser->getSkin() );
 349                 $pager = new LogPager( $loglist, $type, $user, $page, '' );
 350                 $logBody = $pager->getBody();
 351                 if( $logBody ) {
 352                         $out->addHTML(
 353                                 $loglist->beginLogEventsList() .
 354                                 $logBody .
 355                                 $loglist->endLogEventsList()
 356                         );
 357                 } else {
 358                         $out->addWikiMsg( 'logempty' );
 359                 }
 360          }
 361
 362          /**
 363          * SQL clause to skip forbidden log types for this user
 364          * @param Database $db
 365          * @returns mixed (string or false)
 366          */
 367         public static function getExcludeClause( $db ) {
 368                 global $wgLogRestrictions, $wgUser;
 369                 // Reset the array, clears extra "where" clauses when $par is used
 370                 $hiddenLogs = array();
 371                 // Don't show private logs to unprivileged users
 372                 foreach( $wgLogRestrictions as $logtype => $right ) {
 373                         if( !$wgUser->isAllowed($right) ) {
 374                                 $safetype = $db->strencode( $logtype );
 375                                 $hiddenLogs[] = $safetype;
 376                         }
 377                 }
 378                 if( count($hiddenLogs) == 1 ) {
 379                         return 'log_type != ' . $db->addQuotes( $hiddenLogs[0] );
 380                 } elseif( !empty( $hiddenLogs ) ) {
 381                         return 'log_type NOT IN (' . $db->makeList($hiddenLogs) . ')';
 382                 }
 383                 return false;
 384         }
 385 }
 386
 387 /**
 388  * @addtogroup Pager
 389  */
 390 class LogPager extends ReverseChronologicalPager {
 391         private $type = '', $user = '', $title = '', $pattern = '';
 392         public $mLogEventsList;
 393         /**
 394         * constructor
 395         * @param LogEventsList $loglist,
 396         * @param string $type,
 397         * @param string $user,
 398         * @param string $page,
 399         * @param string $pattern
 400         * @param array $conds
 401         */
 402         function __construct( $loglist, $type='', $user='', $title='', $pattern='', $conds = array() ) {
 403                 parent::__construct();
 404                 $this->mConds = $conds;
 405
 406                 $this->mLogEventsList = $loglist;
 407
 408                 $this->limitType( $type );
 409                 $this->limitUser( $user );
 410                 $this->limitTitle( $title, $pattern );
 411         }
 412
 413         /**
 414          * Set the log reader to return only entries of the given type.
 415          * Type restrictions enforced here
 416          * @param string $type A log type ('upload', 'delete', etc)
 417          * @private
 418          */
 419         private function limitType( $type ) {
 420                 global $wgLogRestrictions, $wgUser;
 421                 // Don't even show header for private logs; don't recognize it...
 422                 if( isset($wgLogRestrictions[$type]) && !$wgUser->isAllowed($wgLogRestrictions[$type]) ) {
 423                         $type = '';
 424                 }
 425                 // Don't show private logs to unpriviledged users
 426                 $hideLogs = LogEventsList::getExcludeClause( $this->mDb );
 427                 if( $hideLogs !== false ) {
 428                         $this->mConds[] = $hideLogs;
 429                 }
 430                 if( empty($type) ) {
 431                         return false;
 432                 }
 433                 $this->type = $type;
 434                 $this->mConds['log_type'] = $type;
 435         }
 436
 437         /**
 438          * Set the log reader to return only entries by the given user.
 439          * @param string $name (In)valid user name
 440          * @private
 441          */
 442         function limitUser( $name ) {
 443                 if( $name == '' ) {
 444                         return false;
 445                 }
 446                 $usertitle = Title::makeTitleSafe( NS_USER, $name );
 447                 if( is_null($usertitle) ) {
 448                         return false;
 449                 }
 450                 $this->user = $usertitle->getText();
 451                 /* Fetch userid at first, if known, provides awesome query plan afterwards */
 452                 $userid = User::idFromName( $this->user );
 453                 if( !$userid ) {
 454                         /* It should be nicer to abort query at all,
 455                            but for now it won't pass anywhere behind the optimizer */
 456                         $this->mConds[] = "NULL";
 457                 } else {
 458                         $this->mConds['log_user'] = $userid;
 459                 }
 460         }
 461
 462         /**
 463          * Set the log reader to return only entries affecting the given page.
 464          * (For the block and rights logs, this is a user page.)
 465          * @param string $page Title name as text
 466          * @private
 467          */
 468         function limitTitle( $page, $pattern ) {
 469                 global $wgMiserMode;
 470
 471                 $title = Title::newFromText( $page );
 472                 if( strlen($page) == 0 || !$title instanceof Title )
 473                         return false;
 474
 475                 $this->title = $title->getPrefixedText();
 476                 $this->pattern = $pattern;
 477                 $ns = $title->getNamespace();
 478                 if( $pattern && !$wgMiserMode ) {
 479                         # use escapeLike to avoid expensive search patterns like 't%st%'
 480                         $safetitle = $this->mDb->escapeLike( $title->getDBkey() );
 481                         $this->mConds['log_namespace'] = $ns;
 482                         $this->mConds[] = "log_title LIKE '$safetitle%'";
 483                 } else {
 484                         $this->mConds['log_namespace'] = $ns;
 485                         $this->mConds['log_title'] = $title->getDBkey();
 486                 }
 487         }
 488
 489         function getQueryInfo() {
 490                 $this->mConds[] = 'user_id = log_user';
 491                 # Hack this until live
 492                 global $wgAllowLogDeletion;
 493                 $log_id = $wgAllowLogDeletion ? 'log_id' : '0 AS log_id';
 494                 # Don't use the wrong logging index
 495                 if( $this->title || $this->pattern || $this->user ) {
 496                         $index = array( 'USE INDEX' => array( 'logging' => array('page_time','user_time') ) );
 497                 } else if( $this->type ) {
 498                         $index = array( 'USE INDEX' => array( 'logging' => 'type_time' ) );
 499                 } else {
 500                         $index = array( 'USE INDEX' => array( 'logging' => 'times' ) );
 501                 }
 502                 return array(
 503                         'tables' => array( 'logging', 'user' ),
 504                         'fields' => array( 'log_type', 'log_action', 'log_user', 'log_namespace', 'log_title',
 505                                 'log_params', 'log_comment', $log_id, 'log_deleted', 'log_timestamp', 'user_name' ),
 506                         'conds' => $this->mConds,
 507                         'options' => $index
 508                 );
 509         }
 510
 511         function getIndexField() {
 512                 return 'log_timestamp';
 513         }
 514
 515         function getStartBody() {
 516                 wfProfileIn( __METHOD__ );
 517                 # Do a link batch query
 518                 $lb = new LinkBatch;
 519                 while( $row = $this->mResult->fetchObject() ) {
 520                         $lb->add( $row->log_namespace, $row->log_title );
 521                         $lb->addObj( Title::makeTitleSafe( NS_USER, $row->user_name ) );
 522                         $lb->addObj( Title::makeTitleSafe( NS_USER_TALK, $row->user_name ) );
 523                 }
 524                 $lb->execute();
 525                 $this->mResult->seek( 0 );
 526                 wfProfileOut( __METHOD__ );
 527                 return '';
 528         }
 529
 530         function formatRow( $row ) {
 531                 return $this->mLogEventsList->logLine( $row );
 532         }
 533
 534         public function getType() {
 535                 return $this->type;
 536         }
 537
 538         public function getUser() {
 539                 return $this->user;
 540         }
 541
 542         public function getPage() {
 543                 return $this->title;
 544         }
 545
 546         public function getPattern() {
 547                 return $this->pattern;
 548         }
 549 }
 550
 551 /**
 552  *
 553  * @addtogroup SpecialPage
 554  */
 555 class LogReader {
 556         var $pager;
 557         /**
 558          * @param WebRequest $request For internal use use a FauxRequest object to pass arbitrary parameters.
 559          */
 560         function __construct( $request ) {
 561                 global $wgUser;
 562                 # Get parameters
 563                 $type = $request->getVal( 'type' );
 564                 $user = $request->getText( 'user' );
 565                 $title = $request->getText( 'page' );
 566                 $pattern = $request->getBool( 'pattern' );
 567
 568                 $loglist = new LogEventsList( $wgUser->getSkin() );
 569                 $this->pager = new LogPager( $loglist, $type, $user, $title, $pattern );
 570         }
 571
 572         /**
 573         * Is there at least one row?
 574         * @return bool
 575         */
 576         public function hasRows() {
 577                 return isset($this->pager) ? ($this->pager->getNumRows() > 0) : false;
 578         }
 579 }
 580
 581 /**
 582  *
 583  * @addtogroup SpecialPage
 584  */
 585 class LogViewer {
 586         const NO_ACTION_LINK = 1;
 587         /**
 588          * @var LogReader $reader
 589          */
 590         var $reader;
 591         /**
 592          * @param LogReader &$reader where to get our data from
 593          * @param integer $flags Bitwise combination of flags:
 594          *     LogEventsList::NO_ACTION_LINK   Don't show restore/unblock/block links
 595          */
 596         function __construct( &$reader, $flags = 0 ) {
 597                 global $wgUser;
 598                 $this->reader =& $reader;
 599                 $this->reader->pager->mLogEventsList->flags = $flags;
 600                 # Aliases for shorter code...
 601                 $this->pager =& $this->reader->pager;
 602                 $this->logEventsList =& $this->reader->pager->mLogEventsList;
 603         }
 604
 605         /**
 606          * Take over the whole output page in $wgOut with the log display.
 607          */
 608         public function show() {
 609                 global $wgOut;
 610                 # Set title and add header
 611                 $this->logEventsList->showHeader( $wgOut, $pager->getType() );
 612                 # Show form options
 613                 $this->logEventsList->showOptions( $wgOut, $this->pager->getType(), $this->pager->getUser(),
 614                         $this->pager->getPage(), $this->pager->getPattern() );
 615                 # Insert list
 616                 $logBody = $this->pager->getBody();
 617                 if( $logBody ) {
 618                         $wgOut->addHTML(
 619                                 $this->pager->getNavigationBar() .
 620                                 $this->logEventsList->beginLogEventsList() .
 621                                 $logBody .
 622                                 $this->logEventsList->endLogEventsList() .
 623                                 $this->pager->getNavigationBar()
 624                         );
 625                 } else {
 626                         $wgOut->addWikiMsg( 'logempty' );
 627                 }
 628         }
 629
 630         /**
 631          * Output just the list of entries given by the linked LogReader,
 632          * with extraneous UI elements. Use for displaying log fragments in
 633          * another page (eg at Special:Undelete)
 634          * @param OutputPage $out where to send output
 635          */
 636         public function showList( &$out ) {
 637                 $logBody = $this->pager->getBody();
 638                 if( $logBody ) {
 639                         $out->addHTML(
 640                                 $this->logEventsList->beginLogEventsList() .
 641                                 $logBody .
 642                                 $this->logEventsList->endLogEventsList()
 643                         );
 644                 } else {
 645                         $out->addWikiMsg( 'logempty' );
 646                 }
 647         }
 648 }
 649