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  * @todo Rewrite using IndexPager
  29  */
  30 class SpecialAllPages extends IncludableSpecialPage {
  31
  32         /**
  33          * Maximum number of pages to show on single subpage.
  34          *
  35          * @var int $maxPerPage
  36          */
  37         protected $maxPerPage = 345;
  38
  39         /**
  40          * Determines, which message describes the input field 'nsfrom'.
  41          *
  42          * @var string $nsfromMsg
  43          */
  44         protected $nsfromMsg = 'allpagesfrom';
  45
  46         /**
  47          * Constructor
  48          *
  49          * @param string $name Name of the special page, as seen in links and URLs (default: 'Allpages')
  50          */
  51         function __construct( $name = 'Allpages' ) {
  52                 parent::__construct( $name );
  53         }
  54
  55         /**
  56          * Entry point : initialise variables and call subfunctions.
  57          *
  58          * @param string $par Becomes "FOO" when called like Special:Allpages/FOO (default null)
  59          */
  60         function execute( $par ) {
  61                 $request = $this->getRequest();
  62                 $out = $this->getOutput();
  63
  64                 $this->setHeaders();
  65                 $this->outputHeader();
  66                 $out->allowClickjacking();
  67
  68                 # GET values
  69                 $from = $request->getVal( 'from', null );
  70                 $to = $request->getVal( 'to', null );
  71                 $namespace = $request->getInt( 'namespace' );
  72                 $hideredirects = $request->getBool( 'hideredirects', false );
  73
  74                 $namespaces = $this->getLanguage()->getNamespaces();
  75
  76                 $out->setPageTitle(
  77                         ( $namespace > 0 && array_key_exists( $namespace, $namespaces ) ) ?
  78                                 $this->msg( 'allinnamespace', str_replace( '_', ' ', $namespaces[$namespace] ) ) :
  79                                 $this->msg( 'allarticles' )
  80                 );
  81                 $out->addModuleStyles( 'mediawiki.special' );
  82
  83                 if ( $par !== null ) {
  84                         $this->showChunk( $namespace, $par, $to, $hideredirects );
  85                 } elseif ( $from !== null && $to === null ) {
  86                         $this->showChunk( $namespace, $from, $to, $hideredirects );
  87                 } else {
  88                         $this->showToplevel( $namespace, $from, $to, $hideredirects );
  89                 }
  90         }
  91
  92         /**
  93          * Outputs the HTMLForm used on this page
  94          *
  95          * @param int $namespace A namespace constant (default NS_MAIN).
  96          * @param string $from DbKey we are starting listing at.
  97          * @param string $to DbKey we are ending listing at.
  98          * @param bool $hideRedirects Dont show redirects  (default false)
  99          */
 100         protected function outputHTMLForm( $namespace = NS_MAIN,
 101                 $from = '', $to = '', $hideRedirects = false
 102         ) {
 103                 $fields = array(
 104                         'from' => array(
 105                                 'type' => 'text',
 106                                 'name' => 'from',
 107                                 'id' => 'nsfrom',
 108                                 'size' => 30,
 109                                 'label-message' => 'allpagesfrom',
 110                                 'default' => str_replace( '_', ' ', $from ),
 111                         ),
 112                         'to' => array(
 113                                 'type' => 'text',
 114                                 'name' => 'to',
 115                                 'id' => 'nsto',
 116                                 'size' => 30,
 117                                 'label-message' => 'allpagesto',
 118                                 'default' => str_replace( '_', ' ', $to ),
 119                         ),
 120                         'namespace' => array(
 121                                 'type' => 'namespaceselect',
 122                                 'name' => 'namespace',
 123                                 'id' => 'namespace',
 124                                 'label-message' => 'namespace',
 125                                 'all' => null,
 126                                 'value' => $namespace,
 127                         ),
 128                         'hideredirects' => array(
 129                                 'type' => 'check',
 130                                 'name' => 'hideredirects',
 131                                 'id' => 'hidredirects',
 132                                 'label-message' => 'allpages-hide-redirects',
 133                                 'value' => $hideRedirects,
 134                         ),
 135                 );
 136                 $form = HTMLForm::factory( 'table', $fields, $this->getContext() );
 137                 $form->setMethod( 'get' )
 138                         ->setWrapperLegendMsg( 'allpages' )
 139                         ->setSubmitTextMsg( 'allpagessubmit' )
 140                         ->prepareForm()
 141                         ->displayForm( false );
 142         }
 143
 144         /**
 145          * @param int $namespace (default NS_MAIN)
 146          * @param string $from List all pages from this name
 147          * @param string $to List all pages to this name
 148          * @param bool $hideredirects Dont show redirects (default false)
 149          */
 150         function showToplevel( $namespace = NS_MAIN, $from = '', $to = '', $hideredirects = false ) {
 151                 $from = Title::makeTitleSafe( $namespace, $from );
 152                 $to = Title::makeTitleSafe( $namespace, $to );
 153                 $from = ( $from && $from->isLocal() ) ? $from->getDBkey() : null;
 154                 $to = ( $to && $to->isLocal() ) ? $to->getDBkey() : null;
 155
 156                 $this->showChunk( $namespace, $from, $to, $hideredirects );
 157         }
 158
 159         /**
 160          * @param int $namespace Namespace (Default NS_MAIN)
 161          * @param string $from List all pages from this name (default false)
 162          * @param string $to List all pages to this name (default false)
 163          * @param bool $hideredirects Dont show redirects (default false)
 164          */
 165         function showChunk( $namespace = NS_MAIN, $from = false, $to = false, $hideredirects = false ) {
 166                 $output = $this->getOutput();
 167
 168                 $fromList = $this->getNamespaceKeyAndText( $namespace, $from );
 169                 $toList = $this->getNamespaceKeyAndText( $namespace, $to );
 170                 $namespaces = $this->getContext()->getLanguage()->getNamespaces();
 171                 $n = 0;
 172                 $prevTitle = null;
 173
 174                 if ( !$fromList || !$toList ) {
 175                         $out = $this->msg( 'allpagesbadtitle' )->parseAsBlock();
 176                 } elseif ( !array_key_exists( $namespace, $namespaces ) ) {
 177                         // Show errormessage and reset to NS_MAIN
 178                         $out = $this->msg( 'allpages-bad-ns', $namespace )->parse();
 179                         $namespace = NS_MAIN;
 180                 } else {
 181                         list( $namespace, $fromKey, $from ) = $fromList;
 182                         list( , $toKey, $to ) = $toList;
 183
 184                         $dbr = wfGetDB( DB_SLAVE );
 185                         $filterConds = array( 'page_namespace' => $namespace );
 186                         if ( $hideredirects ) {
 187                                 $filterConds['page_is_redirect'] = 0;
 188                         }
 189
 190                         $conds = $filterConds;
 191                         $conds[] = 'page_title >= ' . $dbr->addQuotes( $fromKey );
 192                         if ( $toKey !== "" ) {
 193                                 $conds[] = 'page_title <= ' . $dbr->addQuotes( $toKey );
 194                         }
 195
 196                         $res = $dbr->select( 'page',
 197                                 array( 'page_namespace', 'page_title', 'page_is_redirect', 'page_id' ),
 198                                 $conds,
 199                                 __METHOD__,
 200                                 array(
 201                                         'ORDER BY' => 'page_title',
 202                                         'LIMIT' => $this->maxPerPage + 1,
 203                                         'USE INDEX' => 'name_title',
 204                                 )
 205                         );
 206
 207                         if ( $res->numRows() > 0 ) {
 208                                 $out = Html::openElement( 'ul', array( 'class' => 'mw-allpages-chunk' ) );
 209
 210                                 while ( ( $n < $this->maxPerPage ) && ( $s = $res->fetchObject() ) ) {
 211                                         $t = Title::newFromRow( $s );
 212                                         if ( $t ) {
 213                                                 $out .= '<li' .
 214                                                         ( $s->page_is_redirect ? ' class="allpagesredirect"' : '' ) .
 215                                                         '>' .
 216                                                         Linker::link( $t ) .
 217                                                         "</li>\n";
 218                                         } else {
 219                                                 $out .= '<li>[[' . htmlspecialchars( $s->page_title ) . "]]</li>\n";
 220                                         }
 221                                         $n++;
 222                                 }
 223                                 $out .= Html::closeElement( 'ul' );
 224
 225                                 if ( $res->numRows() > 2 ) {
 226                                         // Only apply CSS column styles if there's more than 2 entries.
 227                                         // Otherwise, rendering is broken as "mw-allpages-body"'s CSS column count is 3.
 228                                         $out = Html::rawElement( 'div', array( 'class' => 'mw-allpages-body' ), $out );
 229                                 }
 230                         } else {
 231                                 $out = '';
 232                         }
 233
 234                         if ( $fromKey !== '' && !$this->including() ) {
 235                                 # Get the first title from previous chunk
 236                                 $prevConds = $filterConds;
 237                                 $prevConds[] = 'page_title < ' . $dbr->addQuotes( $fromKey );
 238                                 $prevKey = $dbr->selectField(
 239                                         'page',
 240                                         'page_title',
 241                                         $prevConds,
 242                                         __METHOD__,
 243                                         array( 'ORDER BY' => 'page_title DESC', 'OFFSET' => $this->maxPerPage - 1 )
 244                                 );
 245
 246                                 if ( $prevKey === false ) {
 247                                         # The previous chunk is not complete, need to link to the very first title
 248                                         # available in the database
 249                                         $prevKey = $dbr->selectField(
 250                                                 'page',
 251                                                 'page_title',
 252                                                 $prevConds,
 253                                                 __METHOD__,
 254                                                 array( 'ORDER BY' => 'page_title' )
 255                                         );
 256                                 }
 257
 258                                 if ( $prevKey !== false ) {
 259                                         $prevTitle = Title::makeTitle( $namespace, $prevKey );
 260                                 }
 261                         }
 262                 }
 263
 264                 if ( $this->including() ) {
 265                         $output->addHTML( $out );
 266                         return;
 267                 }
 268
 269                 $navLinks = array();
 270                 $self = $this->getPageTitle();
 271
 272                 // Generate a "previous page" link if needed
 273                 if ( $prevTitle ) {
 274                         $query = array( 'from' => $prevTitle->getText() );
 275
 276                         if ( $namespace ) {
 277                                 $query['namespace'] = $namespace;
 278                         }
 279
 280                         if ( $hideredirects ) {
 281                                 $query['hideredirects'] = $hideredirects;
 282                         }
 283
 284                         $navLinks[] = Linker::linkKnown(
 285                                 $self,
 286                                 $this->msg( 'prevpage', $prevTitle->getText() )->escaped(),
 287                                 array(),
 288                                 $query
 289                         );
 290
 291                 }
 292
 293                 // Generate a "next page" link if needed
 294                 if ( $n == $this->maxPerPage && $s = $res->fetchObject() ) {
 295                         # $s is the first link of the next chunk
 296                         $t = Title::makeTitle( $namespace, $s->page_title );
 297                         $query = array( 'from' => $t->getText() );
 298
 299                         if ( $namespace ) {
 300                                 $query['namespace'] = $namespace;
 301                         }
 302
 303                         if ( $hideredirects ) {
 304                                 $query['hideredirects'] = $hideredirects;
 305                         }
 306
 307                         $navLinks[] = Linker::linkKnown(
 308                                 $self,
 309                                 $this->msg( 'nextpage', $t->getText() )->escaped(),
 310                                 array(),
 311                                 $query
 312                         );
 313                 }
 314
 315                 $this->outputHTMLForm( $namespace, $from, $to, $hideredirects );
 316
 317                 if ( count( $navLinks ) ) {
 318                         // Add pagination links
 319                         $pagination = Html::rawElement( 'div',
 320                                 array( 'class' => 'mw-allpages-nav' ),
 321                                 $this->getLanguage()->pipeList( $navLinks )
 322                         );
 323
 324                         $output->addHTML( $pagination );
 325                         $out .= Html::element( 'hr' ) . $pagination; // Footer
 326                 }
 327
 328                 $output->addHTML( $out );
 329         }
 330
 331         /**
 332          * @param int $ns The namespace of the article
 333          * @param string $text The name of the article
 334          * @return array( int namespace, string dbkey, string pagename ) or null on error
 335          */
 336         protected function getNamespaceKeyAndText( $ns, $text ) {
 337                 if ( $text == '' ) {
 338                         # shortcut for common case
 339                         return array( $ns, '', '' );
 340                 }
 341
 342                 $t = Title::makeTitleSafe( $ns, $text );
 343                 if ( $t && $t->isLocal() ) {
 344                         return array( $t->getNamespace(), $t->getDBkey(), $t->getText() );
 345                 } elseif ( $t ) {
 346                         return null;
 347                 }
 348
 349                 # try again, in case the problem was an empty pagename
 350                 $text = preg_replace( '/(#|$)/', 'X$1', $text );
 351                 $t = Title::makeTitleSafe( $ns, $text );
 352                 if ( $t && $t->isLocal() ) {
 353                         return array( $t->getNamespace(), '', '' );
 354                 } else {
 355                         return null;
 356                 }
 357         }
 358
 359         /**
 360          * Return an array of subpages beginning with $search that this special page will accept.
 361          *
 362          * @param string $search Prefix to search for
 363          * @param int $limit Maximum number of results to return (usually 10)
 364          * @param int $offset Number of results to skip (usually 0)
 365          * @return string[] Matching subpages
 366          */
 367         public function prefixSearchSubpages( $search, $limit, $offset ) {
 368                 $title = Title::newFromText( $search );
 369                 if ( !$title || !$title->canExist() ) {
 370                         // No prefix suggestion in special and media namespace
 371                         return array();
 372                 }
 373                 // Autocomplete subpage the same as a normal search
 374                 $prefixSearcher = new StringPrefixSearch;
 375                 $result = $prefixSearcher->search( $search, $limit, array(), $offset );
 376                 return $result;
 377         }
 378
 379         protected function getGroupName() {
 380                 return 'pages';
 381         }
 382 }