includes/specials/pagers/ImageListPager.php

   1 <?php
   2 /**
   3  * This program is free software; you can redistribute it and/or modify
   4  * it under the terms of the GNU General Public License as published by
   5  * the Free Software Foundation; either version 2 of the License, or
   6  * (at your option) any later version.
   7  *
   8  * This program is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  11  * GNU General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU General Public License along
  14  * with this program; if not, write to the Free Software Foundation, Inc.,
  15  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  16  * http://www.gnu.org/copyleft/gpl.html
  17  *
  18  * @file
  19  * @ingroup Pager
  20  */
  21
  22 /**
  23  * @ingroup Pager
  24  */
  25 use MediaWiki\MediaWikiServices;
  26 use Wikimedia\Rdbms\IResultWrapper;
  27 use Wikimedia\Rdbms\FakeResultWrapper;
  28
  29 class ImageListPager extends TablePager {
  30
  31         protected $mFieldNames = null;
  32
  33         // Subclasses should override buildQueryConds instead of using $mQueryConds variable.
  34         protected $mQueryConds = [];
  35
  36         protected $mUserName = null;
  37
  38         /**
  39          * The relevant user
  40          *
  41          * @var User|null
  42          */
  43         protected $mUser = null;
  44
  45         protected $mSearch = '';
  46
  47         protected $mIncluding = false;
  48
  49         protected $mShowAll = false;
  50
  51         protected $mTableName = 'image';
  52
  53         function __construct( IContextSource $context, $userName = null, $search = '',
  54                 $including = false, $showAll = false
  55         ) {
  56                 $this->setContext( $context );
  57                 $this->mIncluding = $including;
  58                 $this->mShowAll = $showAll;
  59
  60                 if ( $userName !== null && $userName !== '' ) {
  61                         $nt = Title::makeTitleSafe( NS_USER, $userName );
  62                         if ( is_null( $nt ) ) {
  63                                 $this->outputUserDoesNotExist( $userName );
  64                         } else {
  65                                 $this->mUserName = $nt->getText();
  66                                 $user = User::newFromName( $this->mUserName, false );
  67                                 if ( $user ) {
  68                                         $this->mUser = $user;
  69                                 }
  70                                 if ( !$user || ( $user->isAnon() && !User::isIP( $user->getName() ) ) ) {
  71                                         $this->outputUserDoesNotExist( $userName );
  72                                 }
  73                         }
  74                 }
  75
  76                 if ( $search !== '' && !$this->getConfig()->get( 'MiserMode' ) ) {
  77                         $this->mSearch = $search;
  78                         $nt = Title::newFromText( $this->mSearch );
  79
  80                         if ( $nt ) {
  81                                 $dbr = wfGetDB( DB_REPLICA );
  82                                 $this->mQueryConds[] = 'LOWER(img_name)' .
  83                                         $dbr->buildLike( $dbr->anyString(),
  84                                                 strtolower( $nt->getDBkey() ), $dbr->anyString() );
  85                         }
  86                 }
  87
  88                 if ( !$including ) {
  89                         if ( $this->getRequest()->getText( 'sort', 'img_date' ) == 'img_date' ) {
  90                                 $this->mDefaultDirection = IndexPager::DIR_DESCENDING;
  91                         } else {
  92                                 $this->mDefaultDirection = IndexPager::DIR_ASCENDING;
  93                         }
  94                 } else {
  95                         $this->mDefaultDirection = IndexPager::DIR_DESCENDING;
  96                 }
  97
  98                 parent::__construct( $context );
  99         }
 100
 101         /**
 102          * Get the user relevant to the ImageList
 103          *
 104          * @return User|null
 105          */
 106         function getRelevantUser() {
 107                 return $this->mUser;
 108         }
 109
 110         /**
 111          * Add a message to the output stating that the user doesn't exist
 112          *
 113          * @param string $userName Unescaped user name
 114          */
 115         protected function outputUserDoesNotExist( $userName ) {
 116                 $this->getOutput()->wrapWikiMsg(
 117                         "<div class=\"mw-userpage-userdoesnotexist error\">\n$1\n</div>",
 118                         [
 119                                 'listfiles-userdoesnotexist',
 120                                 wfEscapeWikiText( $userName ),
 121                         ]
 122                 );
 123         }
 124
 125         /**
 126          * Build the where clause of the query.
 127          *
 128          * Replaces the older mQueryConds member variable.
 129          * @param string $table Either "image" or "oldimage"
 130          * @return array The query conditions.
 131          */
 132         protected function buildQueryConds( $table ) {
 133                 $prefix = $table === 'image' ? 'img' : 'oi';
 134                 $conds = [];
 135
 136                 if ( !is_null( $this->mUserName ) ) {
 137                         // getQueryInfoReal() should have handled the tables and joins.
 138                         $dbr = wfGetDB( DB_REPLICA );
 139                         $actorWhere = ActorMigration::newMigration()->getWhere(
 140                                 $dbr,
 141                                 $prefix . '_user',
 142                                 User::newFromName( $this->mUserName, false )
 143                         );
 144                         $conds[] = $actorWhere['conds'];
 145                 }
 146
 147                 if ( $this->mSearch !== '' ) {
 148                         $nt = Title::newFromText( $this->mSearch );
 149                         if ( $nt ) {
 150                                 $dbr = wfGetDB( DB_REPLICA );
 151                                 $conds[] = 'LOWER(' . $prefix . '_name)' .
 152                                         $dbr->buildLike( $dbr->anyString(),
 153                                                 strtolower( $nt->getDBkey() ), $dbr->anyString() );
 154                         }
 155                 }
 156
 157                 if ( $table === 'oldimage' ) {
 158                         // Don't want to deal with revdel.
 159                         // Future fixme: Show partial information as appropriate.
 160                         // Would have to be careful about filtering by username when username is deleted.
 161                         $conds['oi_deleted'] = 0;
 162                 }
 163
 164                 // Add mQueryConds in case anyone was subclassing and using the old variable.
 165                 return $conds + $this->mQueryConds;
 166         }
 167
 168         /**
 169          * The array keys (but not the array values) are used in sql. Phan
 170          * gets confused by this, so mark this method as being ok for sql in general.
 171          * @return-taint onlysafefor_sql
 172          * @return array
 173          */
 174         function getFieldNames() {
 175                 if ( !$this->mFieldNames ) {
 176                         $this->mFieldNames = [
 177                                 'img_timestamp' => $this->msg( 'listfiles_date' )->text(),
 178                                 'img_name' => $this->msg( 'listfiles_name' )->text(),
 179                                 'thumb' => $this->msg( 'listfiles_thumb' )->text(),
 180                                 'img_size' => $this->msg( 'listfiles_size' )->text(),
 181                         ];
 182                         if ( is_null( $this->mUserName ) ) {
 183                                 // Do not show username if filtering by username
 184                                 $this->mFieldNames['img_user_text'] = $this->msg( 'listfiles_user' )->text();
 185                         }
 186                         // img_description down here, in order so that its still after the username field.
 187                         $this->mFieldNames['img_description'] = $this->msg( 'listfiles_description' )->text();
 188
 189                         if ( !$this->getConfig()->get( 'MiserMode' ) && !$this->mShowAll ) {
 190                                 $this->mFieldNames['count'] = $this->msg( 'listfiles_count' )->text();
 191                         }
 192                         if ( $this->mShowAll ) {
 193                                 $this->mFieldNames['top'] = $this->msg( 'listfiles-latestversion' )->text();
 194                         }
 195                 }
 196
 197                 return $this->mFieldNames;
 198         }
 199
 200         function isFieldSortable( $field ) {
 201                 if ( $this->mIncluding ) {
 202                         return false;
 203                 }
 204                 $sortable = [ 'img_timestamp', 'img_name', 'img_size' ];
 205                 /* For reference, the indicies we can use for sorting are:
 206                  * On the image table: img_user_timestamp/img_usertext_timestamp/img_actor_timestamp,
 207                  * img_size, img_timestamp
 208                  * On oldimage: oi_usertext_timestamp/oi_actor_timestamp, oi_name_timestamp
 209                  *
 210                  * In particular that means we cannot sort by timestamp when not filtering
 211                  * by user and including old images in the results. Which is sad.
 212                  */
 213                 if ( $this->getConfig()->get( 'MiserMode' ) && !is_null( $this->mUserName ) ) {
 214                         // If we're sorting by user, the index only supports sorting by time.
 215                         if ( $field === 'img_timestamp' ) {
 216                                 return true;
 217                         } else {
 218                                 return false;
 219                         }
 220                 } elseif ( $this->getConfig()->get( 'MiserMode' )
 221                         && $this->mShowAll /* && mUserName === null */
 222                 ) {
 223                         // no oi_timestamp index, so only alphabetical sorting in this case.
 224                         if ( $field === 'img_name' ) {
 225                                 return true;
 226                         } else {
 227                                 return false;
 228                         }
 229                 }
 230
 231                 return in_array( $field, $sortable );
 232         }
 233
 234         function getQueryInfo() {
 235                 // Hacky Hacky Hacky - I want to get query info
 236                 // for two different tables, without reimplementing
 237                 // the pager class.
 238                 $qi = $this->getQueryInfoReal( $this->mTableName );
 239
 240                 return $qi;
 241         }
 242
 243         /**
 244          * Actually get the query info.
 245          *
 246          * This is to allow displaying both stuff from image and oldimage table.
 247          *
 248          * This is a bit hacky.
 249          *
 250          * @param string $table Either 'image' or 'oldimage'
 251          * @return array Query info
 252          */
 253         protected function getQueryInfoReal( $table ) {
 254                 $prefix = $table === 'oldimage' ? 'oi' : 'img';
 255
 256                 $tables = [ $table ];
 257                 $fields = $this->getFieldNames();
 258                 unset( $fields['img_description'] );
 259                 unset( $fields['img_user_text'] );
 260                 $fields = array_keys( $fields );
 261
 262                 if ( $table === 'oldimage' ) {
 263                         foreach ( $fields as $id => &$field ) {
 264                                 if ( substr( $field, 0, 4 ) !== 'img_' ) {
 265                                         continue;
 266                                 }
 267                                 $field = $prefix . substr( $field, 3 ) . ' AS ' . $field;
 268                         }
 269                         $fields[array_search( 'top', $fields )] = "'no' AS top";
 270                 } else {
 271                         if ( $this->mShowAll ) {
 272                                 $fields[array_search( 'top', $fields )] = "'yes' AS top";
 273                         }
 274                 }
 275                 $fields[array_search( 'thumb', $fields )] = $prefix . '_name AS thumb';
 276
 277                 $options = $join_conds = [];
 278
 279                 # Description field
 280                 $commentQuery = CommentStore::getStore()->getJoin( $prefix . '_description' );
 281                 $tables += $commentQuery['tables'];
 282                 $fields += $commentQuery['fields'];
 283                 $join_conds += $commentQuery['joins'];
 284                 $fields['description_field'] = "'{$prefix}_description'";
 285
 286                 # User fields
 287                 $actorQuery = ActorMigration::newMigration()->getJoin( $prefix . '_user' );
 288                 $tables += $actorQuery['tables'];
 289                 $join_conds += $actorQuery['joins'];
 290                 $fields['img_user'] = $actorQuery['fields'][$prefix . '_user'];
 291                 $fields['img_user_text'] = $actorQuery['fields'][$prefix . '_user_text'];
 292                 $fields['img_actor'] = $actorQuery['fields'][$prefix . '_actor'];
 293
 294                 # Depends on $wgMiserMode
 295                 # Will also not happen if mShowAll is true.
 296                 if ( isset( $this->mFieldNames['count'] ) ) {
 297                         $tables[] = 'oldimage';
 298
 299                         # Need to rewrite this one
 300                         foreach ( $fields as &$field ) {
 301                                 if ( $field == 'count' ) {
 302                                         $field = 'COUNT(oi_archive_name) AS count';
 303                                 }
 304                         }
 305                         unset( $field );
 306
 307                         $columnlist = preg_grep( '/^img/', array_keys( $this->getFieldNames() ) );
 308                         $options = [ 'GROUP BY' => array_merge( [ $fields['img_user'] ], $columnlist ) ];
 309                         $join_conds['oldimage'] = [ 'LEFT JOIN', 'oi_name = img_name' ];
 310                 }
 311
 312                 return [
 313                         'tables' => $tables,
 314                         'fields' => $fields,
 315                         'conds' => $this->buildQueryConds( $table ),
 316                         'options' => $options,
 317                         'join_conds' => $join_conds
 318                 ];
 319         }
 320
 321         /**
 322          * Override reallyDoQuery to mix together two queries.
 323          *
 324          * @note $asc is named $descending in IndexPager base class. However
 325          *   it is true when the order is ascending, and false when the order
 326          *   is descending, so I renamed it to $asc here.
 327          * @param int $offset
 328          * @param int $limit
 329          * @param bool $asc
 330          * @return array
 331          * @throws MWException
 332          */
 333         function reallyDoQuery( $offset, $limit, $asc ) {
 334                 $prevTableName = $this->mTableName;
 335                 $this->mTableName = 'image';
 336                 list( $tables, $fields, $conds, $fname, $options, $join_conds ) =
 337                         $this->buildQueryInfo( $offset, $limit, $asc );
 338                 $imageRes = $this->mDb->select( $tables, $fields, $conds, $fname, $options, $join_conds );
 339                 $this->mTableName = $prevTableName;
 340
 341                 if ( !$this->mShowAll ) {
 342                         return $imageRes;
 343                 }
 344
 345                 $this->mTableName = 'oldimage';
 346
 347                 # Hacky...
 348                 $oldIndex = $this->mIndexField;
 349                 if ( substr( $this->mIndexField, 0, 4 ) !== 'img_' ) {
 350                         throw new MWException( "Expected to be sorting on an image table field" );
 351                 }
 352                 $this->mIndexField = 'oi_' . substr( $this->mIndexField, 4 );
 353
 354                 list( $tables, $fields, $conds, $fname, $options, $join_conds ) =
 355                         $this->buildQueryInfo( $offset, $limit, $asc );
 356                 $oldimageRes = $this->mDb->select( $tables, $fields, $conds, $fname, $options, $join_conds );
 357
 358                 $this->mTableName = $prevTableName;
 359                 $this->mIndexField = $oldIndex;
 360
 361                 return $this->combineResult( $imageRes, $oldimageRes, $limit, $asc );
 362         }
 363
 364         /**
 365          * Combine results from 2 tables.
 366          *
 367          * Note: This will throw away some results
 368          *
 369          * @param IResultWrapper $res1
 370          * @param IResultWrapper $res2
 371          * @param int $limit
 372          * @param bool $ascending See note about $asc in $this->reallyDoQuery
 373          * @return FakeResultWrapper $res1 and $res2 combined
 374          */
 375         protected function combineResult( $res1, $res2, $limit, $ascending ) {
 376                 $res1->rewind();
 377                 $res2->rewind();
 378                 $topRes1 = $res1->next();
 379                 $topRes2 = $res2->next();
 380                 $resultArray = [];
 381                 for ( $i = 0; $i < $limit && $topRes1 && $topRes2; $i++ ) {
 382                         if ( strcmp( $topRes1->{$this->mIndexField}, $topRes2->{$this->mIndexField} ) > 0 ) {
 383                                 if ( !$ascending ) {
 384                                         $resultArray[] = $topRes1;
 385                                         $topRes1 = $res1->next();
 386                                 } else {
 387                                         $resultArray[] = $topRes2;
 388                                         $topRes2 = $res2->next();
 389                                 }
 390                         } else {
 391                                 if ( !$ascending ) {
 392                                         $resultArray[] = $topRes2;
 393                                         $topRes2 = $res2->next();
 394                                 } else {
 395                                         $resultArray[] = $topRes1;
 396                                         $topRes1 = $res1->next();
 397                                 }
 398                         }
 399                 }
 400
 401                 for ( ; $i < $limit && $topRes1; $i++ ) {
 402                         $resultArray[] = $topRes1;
 403                         $topRes1 = $res1->next();
 404                 }
 405
 406                 for ( ; $i < $limit && $topRes2; $i++ ) {
 407                         $resultArray[] = $topRes2;
 408                         $topRes2 = $res2->next();
 409                 }
 410
 411                 return new FakeResultWrapper( $resultArray );
 412         }
 413
 414         function getDefaultSort() {
 415                 if ( $this->mShowAll && $this->getConfig()->get( 'MiserMode' ) && is_null( $this->mUserName ) ) {
 416                         // Unfortunately no index on oi_timestamp.
 417                         return 'img_name';
 418                 } else {
 419                         return 'img_timestamp';
 420                 }
 421         }
 422
 423         function doBatchLookups() {
 424                 $userIds = [];
 425                 $this->mResult->seek( 0 );
 426                 foreach ( $this->mResult as $row ) {
 427                         $userIds[] = $row->img_user;
 428                 }
 429                 # Do a link batch query for names and userpages
 430                 UserCache::singleton()->doQuery( $userIds, [ 'userpage' ], __METHOD__ );
 431         }
 432
 433         /**
 434          * @param string $field
 435          * @param string $value
 436          * @return Message|string|int The return type depends on the value of $field:
 437          *   - thumb: string
 438          *   - img_timestamp: string
 439          *   - img_name: string
 440          *   - img_user_text: string
 441          *   - img_size: string
 442          *   - img_description: string
 443          *   - count: int
 444          *   - top: Message
 445          * @throws MWException
 446          */
 447         function formatValue( $field, $value ) {
 448                 $linkRenderer = MediaWikiServices::getInstance()->getLinkRenderer();
 449                 switch ( $field ) {
 450                         case 'thumb':
 451                                 $opt = [ 'time' => wfTimestamp( TS_MW, $this->mCurrentRow->img_timestamp ) ];
 452                                 $file = RepoGroup::singleton()->getLocalRepo()->findFile( $value, $opt );
 453                                 // If statement for paranoia
 454                                 if ( $file ) {
 455                                         $thumb = $file->transform( [ 'width' => 180, 'height' => 360 ] );
 456                                         if ( $thumb ) {
 457                                                 return $thumb->toHtml( [ 'desc-link' => true ] );
 458                                         } else {
 459                                                 return $this->msg( 'thumbnail_error', '' )->escaped();
 460                                         }
 461                                 } else {
 462                                         return htmlspecialchars( $value );
 463                                 }
 464                         case 'img_timestamp':
 465                                 // We may want to make this a link to the "old" version when displaying old files
 466                                 return htmlspecialchars( $this->getLanguage()->userTimeAndDate( $value, $this->getUser() ) );
 467                         case 'img_name':
 468                                 static $imgfile = null;
 469                                 if ( $imgfile === null ) {
 470                                         $imgfile = $this->msg( 'imgfile' )->text();
 471                                 }
 472
 473                                 // Weird files can maybe exist? T24227
 474                                 $filePage = Title::makeTitleSafe( NS_FILE, $value );
 475                                 if ( $filePage ) {
 476                                         $link = $linkRenderer->makeKnownLink(
 477                                                 $filePage,
 478                                                 $filePage->getText()
 479                                         );
 480                                         $download = Xml::element( 'a',
 481                                                 [ 'href' => wfLocalFile( $filePage )->getUrl() ],
 482                                                 $imgfile
 483                                         );
 484                                         $download = $this->msg( 'parentheses' )->rawParams( $download )->escaped();
 485
 486                                         // Add delete links if allowed
 487                                         // From https://github.com/Wikia/app/pull/3859
 488                                         if ( $filePage->userCan( 'delete', $this->getUser() ) ) {
 489                                                 $deleteMsg = $this->msg( 'listfiles-delete' )->text();
 490
 491                                                 $delete = $linkRenderer->makeKnownLink(
 492                                                         $filePage, $deleteMsg, [], [ 'action' => 'delete' ]
 493                                                 );
 494                                                 $delete = $this->msg( 'parentheses' )->rawParams( $delete )->escaped();
 495
 496                                                 return "$link $download $delete";
 497                                         }
 498
 499                                         return "$link $download";
 500                                 } else {
 501                                         return htmlspecialchars( $value );
 502                                 }
 503                         case 'img_user_text':
 504                                 if ( $this->mCurrentRow->img_user ) {
 505                                         $name = User::whoIs( $this->mCurrentRow->img_user );
 506                                         $link = $linkRenderer->makeLink(
 507                                                 Title::makeTitle( NS_USER, $name ),
 508                                                 $name
 509                                         );
 510                                 } else {
 511                                         $link = htmlspecialchars( $value );
 512                                 }
 513
 514                                 return $link;
 515                         case 'img_size':
 516                                 return htmlspecialchars( $this->getLanguage()->formatSize( $value ) );
 517                         case 'img_description':
 518                                 $field = $this->mCurrentRow->description_field;
 519                                 $value = CommentStore::getStore()->getComment( $field, $this->mCurrentRow )->text;
 520                                 return Linker::formatComment( $value );
 521                         case 'count':
 522                                 return $this->getLanguage()->formatNum( intval( $value ) + 1 );
 523                         case 'top':
 524                                 // Messages: listfiles-latestversion-yes, listfiles-latestversion-no
 525                                 return $this->msg( 'listfiles-latestversion-' . $value );
 526                         default:
 527                                 throw new MWException( "Unknown field '$field'" );
 528                 }
 529         }
 530
 531         function getForm() {
 532                 $formDescriptor = [];
 533                 $formDescriptor['limit'] = [
 534                         'type' => 'select',
 535                         'name' => 'limit',
 536                         'label-message' => 'table_pager_limit_label',
 537                         'options' => $this->getLimitSelectList(),
 538                         'default' => $this->mLimit,
 539                 ];
 540
 541                 if ( !$this->getConfig()->get( 'MiserMode' ) ) {
 542                         $formDescriptor['ilsearch'] = [
 543                                 'type' => 'text',
 544                                 'name' => 'ilsearch',
 545                                 'id' => 'mw-ilsearch',
 546                                 'label-message' => 'listfiles_search_for',
 547                                 'default' => $this->mSearch,
 548                                 'size' => '40',
 549                                 'maxlength' => '255',
 550                         ];
 551                 }
 552
 553                 $formDescriptor['user'] = [
 554                         'type' => 'user',
 555                         'name' => 'user',
 556                         'id' => 'mw-listfiles-user',
 557                         'label-message' => 'username',
 558                         'default' => $this->mUserName,
 559                         'size' => '40',
 560                         'maxlength' => '255',
 561                 ];
 562
 563                 $formDescriptor['ilshowall'] = [
 564                         'type' => 'check',
 565                         'name' => 'ilshowall',
 566                         'id' => 'mw-listfiles-show-all',
 567                         'label-message' => 'listfiles-show-all',
 568                         'default' => $this->mShowAll,
 569                 ];
 570
 571                 $query = $this->getRequest()->getQueryValues();
 572                 unset( $query['title'] );
 573                 unset( $query['limit'] );
 574                 unset( $query['ilsearch'] );
 575                 unset( $query['ilshowall'] );
 576                 unset( $query['user'] );
 577
 578                 $htmlForm = HTMLForm::factory( 'ooui', $formDescriptor, $this->getContext() );
 579                 $htmlForm
 580                         ->setMethod( 'get' )
 581                         ->setId( 'mw-listfiles-form' )
 582                         ->setTitle( $this->getTitle() )
 583                         ->setSubmitTextMsg( 'table_pager_limit_submit' )
 584                         ->setWrapperLegendMsg( 'listfiles' )
 585                         ->addHiddenFields( $query )
 586                         ->prepareForm()
 587                         ->displayForm( '' );
 588         }
 589
 590         protected function getTableClass() {
 591                 return parent::getTableClass() . ' listfiles';
 592         }
 593
 594         protected function getNavClass() {
 595                 return parent::getNavClass() . ' listfiles_nav';
 596         }
 597
 598         protected function getSortHeaderClass() {
 599                 return parent::getSortHeaderClass() . ' listfiles_sort';
 600         }
 601
 602         function getPagingQueries() {
 603                 $queries = parent::getPagingQueries();
 604                 if ( !is_null( $this->mUserName ) ) {
 605                         # Append the username to the query string
 606                         foreach ( $queries as &$query ) {
 607                                 if ( $query !== false ) {
 608                                         $query['user'] = $this->mUserName;
 609                                 }
 610                         }
 611                 }
 612
 613                 return $queries;
 614         }
 615
 616         function getDefaultQuery() {
 617                 $queries = parent::getDefaultQuery();
 618                 if ( !isset( $queries['user'] ) && !is_null( $this->mUserName ) ) {
 619                         $queries['user'] = $this->mUserName;
 620                 }
 621
 622                 return $queries;
 623         }
 624
 625         function getTitle() {
 626                 return SpecialPage::getTitleFor( 'Listfiles' );
 627         }
 628 }