includes/specials/SpecialAllpages.php

   1 <?php
   2 /**
   3  * Implements Special:Allpages
   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  * @file
  21  * @ingroup SpecialPage
  22  */
  23
  24 /**
  25  * Implements Special:Allpages
  26  *
  27  * @ingroup SpecialPage
  28  */
  29 class SpecialAllpages extends IncludableSpecialPage {
  30
  31         /**
  32          * Maximum number of pages to show on single subpage.
  33          *
  34          * @var int $maxPerPage
  35          */
  36         protected $maxPerPage = 345;
  37
  38         /**
  39          * Maximum number of pages to show on single index subpage.
  40          *
  41          * @var int $maxLineCount
  42          */
  43         protected $maxLineCount = 100;
  44
  45         /**
  46          * Maximum number of chars to show for an entry.
  47          *
  48          * @var int $maxPageLength
  49          */
  50         protected $maxPageLength = 70;
  51
  52         /**
  53          * Determines, which message describes the input field 'nsfrom'.
  54          *
  55          * @var string $nsfromMsg
  56          */
  57         protected $nsfromMsg = 'allpagesfrom';
  58
  59         /**
  60          * Constructor
  61          *
  62          * @param $name string: name of the special page, as seen in links and URLs (default: 'Allpages')
  63          */
  64         function __construct( $name = 'Allpages' ){
  65                 parent::__construct( $name );
  66         }
  67
  68         /**
  69          * Entry point : initialise variables and call subfunctions.
  70          *
  71          * @param $par String: becomes "FOO" when called like Special:Allpages/FOO (default NULL)
  72          */
  73         function execute( $par ) {
  74                 global $wgContLang;
  75                 $request = $this->getRequest();
  76                 $out = $this->getOutput();
  77
  78                 $this->setHeaders();
  79                 $this->outputHeader();
  80                 $out->allowClickjacking();
  81
  82                 # GET values
  83                 $from = $request->getVal( 'from', null );
  84                 $to = $request->getVal( 'to', null );
  85                 $namespace = $request->getInt( 'namespace' );
  86                 $hideredirects = $request->getBool( 'hideredirects', false );
  87
  88                 $namespaces = $wgContLang->getNamespaces();
  89
  90                 $out->setPageTitle(
  91                         ( $namespace > 0 && in_array( $namespace, array_keys( $namespaces) ) ) ?
  92                         $this->msg( 'allinnamespace', str_replace( '_', ' ', $namespaces[$namespace] ) ) :
  93                         $this->msg( 'allarticles' )
  94                 );
  95                 $out->addModuleStyles( 'mediawiki.special' );
  96
  97                 if( $par !== null ) {
  98                         $this->showChunk( $namespace, $par, $to, $hideredirects );
  99                 } elseif( $from !== null && $to === null ) {
 100                         $this->showChunk( $namespace, $from, $to, $hideredirects );
 101                 } else {
 102                         $this->showToplevel( $namespace, $from, $to, $hideredirects );
 103                 }
 104         }
 105
 106         /**
 107          * HTML for the top form
 108          *
 109          * @param $namespace Integer: a namespace constant (default NS_MAIN).
 110          * @param $from String: dbKey we are starting listing at.
 111          * @param $to String: dbKey we are ending listing at.
 112          * @param $hideredirects Bool: dont show redirects  (default FALSE)
 113          * @return string
 114          */
 115         function namespaceForm( $namespace = NS_MAIN, $from = '', $to = '', $hideredirects = false ) {
 116                 global $wgScript;
 117                 $t = $this->getTitle();
 118
 119                 $out  = Xml::openElement( 'div', array( 'class' => 'namespaceoptions' ) );
 120                 $out .= Xml::openElement( 'form', array( 'method' => 'get', 'action' => $wgScript ) );
 121                 $out .= Html::hidden( 'title', $t->getPrefixedText() );
 122                 $out .= Xml::openElement( 'fieldset' );
 123                 $out .= Xml::element( 'legend', null, $this->msg( 'allpages' )->text() );
 124                 $out .= Xml::openElement( 'table', array( 'id' => 'nsselect', 'class' => 'allpages' ) );
 125                 $out .= "<tr>
 126         <td class='mw-label'>" .
 127                         Xml::label( $this->msg( 'allpagesfrom' )->text(), 'nsfrom' ) .
 128                         "       </td>
 129         <td class='mw-input'>" .
 130                         Xml::input( 'from', 30, str_replace('_',' ',$from), array( 'id' => 'nsfrom' ) ) .
 131                         "       </td>
 132 </tr>
 133 <tr>
 134         <td class='mw-label'>" .
 135                         Xml::label( $this->msg( 'allpagesto' )->text(), 'nsto' ) .
 136                         "       </td>
 137                         <td class='mw-input'>" .
 138                         Xml::input( 'to', 30, str_replace('_',' ',$to), array( 'id' => 'nsto' ) ) .
 139                         "               </td>
 140 </tr>
 141 <tr>
 142         <td class='mw-label'>" .
 143                         Xml::label( $this->msg( 'namespace' )->text(), 'namespace' ) .
 144                         "       </td>
 145                         <td class='mw-input'>" .
 146                         Html::namespaceSelector(
 147                                 array( 'selected' => $namespace ),
 148                                 array( 'name' => 'namespace', 'id' => 'namespace' )
 149                         ) . ' ' .
 150                         Xml::checkLabel(
 151                                 $this->msg( 'allpages-hide-redirects' )->text(),
 152                                 'hideredirects',
 153                                 'hideredirects',
 154                                 $hideredirects
 155                         ) . ' ' .
 156                         Xml::submitButton( $this->msg( 'allpagessubmit' )->text() ) .
 157                         "       </td>
 158 </tr>";
 159                 $out .= Xml::closeElement( 'table' );
 160                 $out .= Xml::closeElement( 'fieldset' );
 161                 $out .= Xml::closeElement( 'form' );
 162                 $out .= Xml::closeElement( 'div' );
 163                 return $out;
 164         }
 165
 166         /**
 167          * @param $namespace Integer (default NS_MAIN)
 168          * @param $from String: list all pages from this name
 169          * @param $to String: list all pages to this name
 170          * @param $hideredirects Bool: dont show redirects (default FALSE)
 171          */
 172         function showToplevel( $namespace = NS_MAIN, $from = '', $to = '', $hideredirects = false ) {
 173                 $output = $this->getOutput();
 174
 175                 # TODO: Either make this *much* faster or cache the title index points
 176                 # in the querycache table.
 177
 178                 $dbr = wfGetDB( DB_SLAVE );
 179                 $out = "";
 180                 $where = array( 'page_namespace' => $namespace );
 181
 182                 if ( $hideredirects ) {
 183                         $where[ 'page_is_redirect' ] = 0;
 184                 }
 185
 186                 $from = Title::makeTitleSafe( $namespace, $from );
 187                 $to = Title::makeTitleSafe( $namespace, $to );
 188                 $from = ( $from && $from->isLocal() ) ? $from->getDBkey() : null;
 189                 $to = ( $to && $to->isLocal() ) ? $to->getDBkey() : null;
 190
 191                 if( isset($from) )
 192                         $where[] = 'page_title >= '.$dbr->addQuotes( $from );
 193                 if( isset($to) )
 194                         $where[] = 'page_title <= '.$dbr->addQuotes( $to );
 195
 196                 global $wgMemc;
 197                 $key = wfMemcKey( 'allpages', 'ns', $namespace, $from, $to );
 198                 $lines = $wgMemc->get( $key );
 199
 200                 $count = $dbr->estimateRowCount( 'page', '*', $where, __METHOD__ );
 201                 $maxPerSubpage = intval($count/$this->maxLineCount);
 202                 $maxPerSubpage = max($maxPerSubpage,$this->maxPerPage);
 203
 204                 if( !is_array( $lines ) ) {
 205                         $options = array( 'LIMIT' => 1 );
 206                         $options['ORDER BY'] = 'page_title ASC';
 207                         $firstTitle = $dbr->selectField( 'page', 'page_title', $where, __METHOD__, $options );
 208                         $lastTitle = $firstTitle;
 209                         # This array is going to hold the page_titles in order.
 210                         $lines = array( $firstTitle );
 211                         # If we are going to show n rows, we need n+1 queries to find the relevant titles.
 212                         $done = false;
 213                         while( !$done ) {
 214                                 // Fetch the last title of this chunk and the first of the next
 215                                 $chunk = ( $lastTitle === false )
 216                                         ? array()
 217                                         : array( 'page_title >= ' . $dbr->addQuotes( $lastTitle ) );
 218                                 $res = $dbr->select( 'page', /* FROM */
 219                                         'page_title', /* WHAT */
 220                                         array_merge($where,$chunk),
 221                                         __METHOD__,
 222                                         array ('LIMIT' => 2, 'OFFSET' => $maxPerSubpage - 1, 'ORDER BY' => 'page_title ASC')
 223                                 );
 224
 225                                 $s = $dbr->fetchObject( $res );
 226                                 if( $s ) {
 227                                         array_push( $lines, $s->page_title );
 228                                 } else {
 229                                         // Final chunk, but ended prematurely. Go back and find the end.
 230                                         $endTitle = $dbr->selectField( 'page', 'MAX(page_title)',
 231                                                 array_merge($where,$chunk),
 232                                                 __METHOD__ );
 233                                         array_push( $lines, $endTitle );
 234                                         $done = true;
 235                                 }
 236                                 $s = $res->fetchObject();
 237                                 if( $s ) {
 238                                         array_push( $lines, $s->page_title );
 239                                         $lastTitle = $s->page_title;
 240                                 } else {
 241                                         // This was a final chunk and ended exactly at the limit.
 242                                         // Rare but convenient!
 243                                         $done = true;
 244                                 }
 245                                 $res->free();
 246                         }
 247                         $wgMemc->add( $key, $lines, 3600 );
 248                 }
 249
 250                 // If there are only two or less sections, don't even display them.
 251                 // Instead, display the first section directly.
 252                 if( count( $lines ) <= 2 ) {
 253                         if( !empty($lines) ) {
 254                                 $this->showChunk( $namespace, $from, $to, $hideredirects );
 255                         } else {
 256                                 $output->addHTML( $this->namespaceForm( $namespace, $from, $to, $hideredirects ) );
 257                         }
 258                         return;
 259                 }
 260
 261                 # At this point, $lines should contain an even number of elements.
 262                 $out .= Xml::openElement( 'table', array( 'class' => 'allpageslist' ) );
 263                 while( count ( $lines ) > 0 ) {
 264                         $inpoint = array_shift( $lines );
 265                         $outpoint = array_shift( $lines );
 266                         $out .= $this->showline( $inpoint, $outpoint, $namespace, $hideredirects );
 267                 }
 268                 $out .= Xml::closeElement( 'table' );
 269                 $nsForm = $this->namespaceForm( $namespace, $from, $to, $hideredirects );
 270
 271                 # Is there more?
 272                 if( $this->including() ) {
 273                         $out2 = '';
 274                 } else {
 275                         if( isset($from) || isset($to) ) {
 276                                 $out2 = Xml::openElement( 'table', array( 'class' => 'mw-allpages-table-form' ) ).
 277                                                 '<tr>
 278                                                         <td>' .
 279                                                                 $nsForm .
 280                                                         '</td>
 281                                                         <td class="mw-allpages-nav">' .
 282                                                                 Linker::link( $this->getTitle(), $this->msg( 'allpages' )->escaped(),
 283                                                                         array(), array(), 'known' ) .
 284                                                         "</td>
 285                                                 </tr>" .
 286                                         Xml::closeElement( 'table' );
 287                         } else {
 288                                 $out2 = $nsForm;
 289                         }
 290                 }
 291                 $output->addHTML( $out2 . $out );
 292         }
 293
 294         /**
 295          * Show a line of "ABC to DEF" ranges of articles
 296          *
 297          * @param $inpoint String: lower limit of pagenames
 298          * @param $outpoint String: upper limit of pagenames
 299          * @param $namespace Integer (Default NS_MAIN)
 300          * @param $hideredirects Bool: dont show redirects (default FALSE)
 301          * @return string
 302          */
 303         function showline( $inpoint, $outpoint, $namespace = NS_MAIN, $hideredirects ) {
 304                 global $wgContLang;
 305                 $inpointf = htmlspecialchars( str_replace( '_', ' ', $inpoint ) );
 306                 $outpointf = htmlspecialchars( str_replace( '_', ' ', $outpoint ) );
 307                 // Don't let the length runaway
 308                 $inpointf = $wgContLang->truncate( $inpointf, $this->maxPageLength );
 309                 $outpointf = $wgContLang->truncate( $outpointf, $this->maxPageLength );
 310
 311                 $queryparams = $namespace ? "namespace=$namespace&" : '';
 312
 313                 $queryhideredirects = array();
 314                 if ($hideredirects) {
 315                         $queryhideredirects[ 'hideredirects' ] = 1;
 316                 }
 317
 318                 $special = $this->getTitle();
 319                 $link = htmlspecialchars( $special->getLocalUrl( $queryparams . 'from=' . urlencode($inpoint) . '&to=' . urlencode($outpoint), $queryhideredirects ) );
 320
 321                 $out = $this->msg( 'alphaindexline' )->rawParams(
 322                         "<a href=\"$link\">$inpointf</a></td><td>",
 323                         "</td><td><a href=\"$link\">$outpointf</a>"
 324                 )->escaped();
 325                 return '<tr><td class="mw-allpages-alphaindexline">' . $out . '</td></tr>';
 326         }
 327
 328         /**
 329          * @param $namespace Integer (Default NS_MAIN)
 330          * @param $from String: list all pages from this name (default FALSE)
 331          * @param $to String: list all pages to this name (default FALSE)
 332          * @param $hideredirects Bool: dont show redirects (default FALSE)
 333          */
 334         function showChunk( $namespace = NS_MAIN, $from = false, $to = false, $hideredirects = false ) {
 335                 global $wgContLang;
 336                 $output = $this->getOutput();
 337
 338                 $fromList = $this->getNamespaceKeyAndText($namespace, $from);
 339                 $toList = $this->getNamespaceKeyAndText( $namespace, $to );
 340                 $namespaces = $wgContLang->getNamespaces();
 341                 $n = 0;
 342
 343                 if ( !$fromList || !$toList ) {
 344                         $out = $this->msg( 'allpagesbadtitle' )->parseAsBlock();
 345                 } elseif ( !in_array( $namespace, array_keys( $namespaces ) ) ) {
 346                         // Show errormessage and reset to NS_MAIN
 347                         $out = $this->msg( 'allpages-bad-ns', $namespace )->parse();
 348                         $namespace = NS_MAIN;
 349                 } else {
 350                         list( $namespace, $fromKey, $from ) = $fromList;
 351                         list( , $toKey, $to ) = $toList;
 352
 353                         $dbr = wfGetDB( DB_SLAVE );
 354                         $conds = array(
 355                                 'page_namespace' => $namespace,
 356                                 'page_title >= ' . $dbr->addQuotes( $fromKey )
 357                         );
 358
 359                         if ( $hideredirects ) {
 360                                 $conds[ 'page_is_redirect' ] = 0;
 361                         }
 362
 363                         if( $toKey !== "" ) {
 364                                 $conds[] = 'page_title <= ' . $dbr->addQuotes( $toKey );
 365                         }
 366
 367                         $res = $dbr->select( 'page',
 368                                 array( 'page_namespace', 'page_title', 'page_is_redirect', 'page_id' ),
 369                                 $conds,
 370                                 __METHOD__,
 371                                 array(
 372                                         'ORDER BY'  => 'page_title',
 373                                         'LIMIT'     => $this->maxPerPage + 1,
 374                                         'USE INDEX' => 'name_title',
 375                                 )
 376                         );
 377
 378                         if( $res->numRows() > 0 ) {
 379                                 $out = Xml::openElement( 'table', array( 'class' => 'mw-allpages-table-chunk' ) );
 380                                 while( ( $n < $this->maxPerPage ) && ( $s = $res->fetchObject() ) ) {
 381                                         $t = Title::newFromRow( $s );
 382                                         if( $t ) {
 383                                                 $link = ( $s->page_is_redirect ? '<div class="allpagesredirect">' : '' ) .
 384                                                         Linker::link( $t ) .
 385                                                         ($s->page_is_redirect ? '</div>' : '' );
 386                                         } else {
 387                                                 $link = '[[' . htmlspecialchars( $s->page_title ) . ']]';
 388                                         }
 389                                         if( $n % 3 == 0 ) {
 390                                                 $out .= '<tr>';
 391                                         }
 392                                         $out .= "<td style=\"width:33%\">$link</td>";
 393                                         $n++;
 394                                         if( $n % 3 == 0 ) {
 395                                                 $out .= "</tr>\n";
 396                                         }
 397                                 }
 398                                 if( ($n % 3) != 0 ) {
 399                                         $out .= "</tr>\n";
 400                                 }
 401                                 $out .= Xml::closeElement( 'table' );
 402                         } else {
 403                                 $out = '';
 404                         }
 405                 }
 406
 407                 if ( $this->including() ) {
 408                         $out2 = '';
 409                 } else {
 410                         if( $from == '' ) {
 411                                 // First chunk; no previous link.
 412                                 $prevTitle = null;
 413                         } else {
 414                                 # Get the last title from previous chunk
 415                                 $dbr = wfGetDB( DB_SLAVE );
 416                                 $res_prev = $dbr->select(
 417                                         'page',
 418                                         'page_title',
 419                                         array( 'page_namespace' => $namespace, 'page_title < '.$dbr->addQuotes($from) ),
 420                                         __METHOD__,
 421                                         array( 'ORDER BY' => 'page_title DESC',
 422                                                 'LIMIT' => $this->maxPerPage, 'OFFSET' => ($this->maxPerPage - 1 )
 423                                         )
 424                                 );
 425
 426                                 # Get first title of previous complete chunk
 427                                 if( $dbr->numrows( $res_prev ) >= $this->maxPerPage ) {
 428                                         $pt = $dbr->fetchObject( $res_prev );
 429                                         $prevTitle = Title::makeTitle( $namespace, $pt->page_title );
 430                                 } else {
 431                                         # The previous chunk is not complete, need to link to the very first title
 432                                         # available in the database
 433                                         $options = array( 'LIMIT' => 1 );
 434                                         if ( ! $dbr->implicitOrderby() ) {
 435                                                 $options['ORDER BY'] = 'page_title';
 436                                         }
 437                                         $reallyFirstPage_title = $dbr->selectField( 'page', 'page_title',
 438                                                 array( 'page_namespace' => $namespace ), __METHOD__, $options );
 439                                         # Show the previous link if it s not the current requested chunk
 440                                         if( $from != $reallyFirstPage_title ) {
 441                                                 $prevTitle =  Title::makeTitle( $namespace, $reallyFirstPage_title );
 442                                         } else {
 443                                                 $prevTitle = null;
 444                                         }
 445                                 }
 446                         }
 447
 448                         $self = $this->getTitle();
 449
 450                         $nsForm = $this->namespaceForm( $namespace, $from, $to, $hideredirects );
 451                         $out2 = Xml::openElement( 'table', array( 'class' => 'mw-allpages-table-form' ) ).
 452                                                 '<tr>
 453                                                         <td>' .
 454                                                                 $nsForm .
 455                                                         '</td>
 456                                                         <td class="mw-allpages-nav">' .
 457                                                                 Linker::link( $self, $this->msg( 'allpages' )->escaped() );
 458
 459                         # Do we put a previous link ?
 460                         if( isset( $prevTitle ) &&  $pt = $prevTitle->getText() ) {
 461                                 $query = array( 'from' => $prevTitle->getText() );
 462
 463                                 if( $namespace )
 464                                         $query['namespace'] = $namespace;
 465
 466                                 if( $hideredirects )
 467                                         $query['hideredirects'] = $hideredirects;
 468
 469                                 $prevLink = Linker::linkKnown(
 470                                         $self,
 471                                         $this->msg( 'prevpage', $pt )->escaped(),
 472                                         array(),
 473                                         $query
 474                                 );
 475                                 $out2 = $this->getLanguage()->pipeList( array( $out2, $prevLink ) );
 476                         }
 477
 478                         if( $n == $this->maxPerPage && $s = $res->fetchObject() ) {
 479                                 # $s is the first link of the next chunk
 480                                 $t = Title::makeTitle($namespace, $s->page_title);
 481                                 $query = array( 'from' => $t->getText() );
 482
 483                                 if( $namespace )
 484                                         $query['namespace'] = $namespace;
 485
 486                                 if( $hideredirects )
 487                                         $query['hideredirects'] = $hideredirects;
 488
 489                                 $nextLink = Linker::linkKnown(
 490                                         $self,
 491                                         $this->msg( 'nextpage', $t->getText() )->escaped(),
 492                                         array(),
 493                                         $query
 494                                 );
 495                                 $out2 = $this->getLanguage()->pipeList( array( $out2, $nextLink ) );
 496                         }
 497                         $out2 .= "</td></tr></table>";
 498                 }
 499
 500                 $output->addHTML( $out2 . $out );
 501
 502                 $links = array();
 503                 if ( isset( $prevLink ) ) $links[] = $prevLink;
 504                 if ( isset( $nextLink ) ) $links[] = $nextLink;
 505
 506                 if ( count( $links ) ) {
 507                         $output->addHTML(
 508                                 Html::element( 'hr' ) .
 509                                 Html::rawElement( 'div', array( 'class' => 'mw-allpages-nav' ),
 510                                         $this->getLanguage()->pipeList( $links )
 511                                 ) );
 512                 }
 513
 514         }
 515
 516         /**
 517          * @param $ns Integer: the namespace of the article
 518          * @param $text String: the name of the article
 519          * @return array( int namespace, string dbkey, string pagename ) or NULL on error
 520          */
 521         protected function getNamespaceKeyAndText($ns, $text) {
 522                 if ( $text == '' )
 523                         return array( $ns, '', '' ); # shortcut for common case
 524
 525                 $t = Title::makeTitleSafe($ns, $text);
 526                 if ( $t && $t->isLocal() ) {
 527                         return array( $t->getNamespace(), $t->getDBkey(), $t->getText() );
 528                 } elseif ( $t ) {
 529                         return null;
 530                 }
 531
 532                 # try again, in case the problem was an empty pagename
 533                 $text = preg_replace('/(#|$)/', 'X$1', $text);
 534                 $t = Title::makeTitleSafe($ns, $text);
 535                 if ( $t && $t->isLocal() ) {
 536                         return array( $t->getNamespace(), '', '' );
 537                 } else {
 538                         return null;
 539                 }
 540         }
 541 }