includes/specials/SpecialCategories.php

   1 <?php
   2 /**
   3  * Implements Special:Categories
   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  * @ingroup SpecialPage
  26  */
  27 class SpecialCategories extends SpecialPage {
  28
  29         function __construct() {
  30                 parent::__construct( 'Categories' );
  31         }
  32
  33         function execute( $par ) {
  34                 global $wgOut, $wgRequest;
  35
  36                 $this->setHeaders();
  37                 $this->outputHeader();
  38
  39                 $from = $wgRequest->getText( 'from', $par );
  40
  41                 $cap = new CategoryPager( $from );
  42                 $cap->doQuery();
  43
  44                 $wgOut->addHTML(
  45                         Html::openElement( 'div', array( 'class' => 'mw-spcontent' ) ) .
  46                         wfMsgExt( 'categoriespagetext', array( 'parse' ), $cap->getNumRows() ) .
  47                         $cap->getStartForm( $from ) .
  48                         $cap->getNavigationBar() .
  49                         '<ul>' . $cap->getBody() . '</ul>' .
  50                         $cap->getNavigationBar() .
  51                         Html::closeElement( 'div' )
  52                 );
  53         }
  54 }
  55
  56 /**
  57  * TODO: Allow sorting by count.  We need to have a unique index to do this
  58  * properly.
  59  *
  60  * @ingroup SpecialPage Pager
  61  */
  62 class CategoryPager extends AlphabeticPager {
  63         function __construct( $from ) {
  64                 parent::__construct();
  65                 $from = str_replace( ' ', '_', $from );
  66                 if( $from !== '' ) {
  67                         $from = Title::capitalize( $from, NS_CATEGORY );
  68                         $this->mOffset = $from;
  69                 }
  70         }
  71
  72         function getQueryInfo() {
  73                 return array(
  74                         'tables' => array( 'category' ),
  75                         'fields' => array( 'cat_title','cat_pages' ),
  76                         'conds' => array( 'cat_pages > 0' ),
  77                         'options' => array( 'USE INDEX' => 'cat_title' ),
  78                 );
  79         }
  80
  81         function getIndexField() {
  82 #               return array( 'abc' => 'cat_title', 'count' => 'cat_pages' );
  83                 return 'cat_title';
  84         }
  85
  86         function getDefaultQuery() {
  87                 parent::getDefaultQuery();
  88                 unset( $this->mDefaultQuery['from'] );
  89                 return $this->mDefaultQuery;
  90         }
  91 #       protected function getOrderTypeMessages() {
  92 #               return array( 'abc' => 'special-categories-sort-abc',
  93 #                       'count' => 'special-categories-sort-count' );
  94 #       }
  95
  96         protected function getDefaultDirections() {
  97 #               return array( 'abc' => false, 'count' => true );
  98                 return false;
  99         }
 100
 101         /* Override getBody to apply LinksBatch on resultset before actually outputting anything. */
 102         public function getBody() {
 103                 $batch = new LinkBatch;
 104
 105                 $this->mResult->rewind();
 106
 107                 while ( $row = $this->mResult->fetchObject() ) {
 108                         $batch->addObj( Title::makeTitleSafe( NS_CATEGORY, $row->cat_title ) );
 109                 }
 110                 $batch->execute();
 111                 $this->mResult->rewind();
 112                 return parent::getBody();
 113         }
 114
 115         function formatRow($result) {
 116                 global $wgLang;
 117                 $title = Title::makeTitle( NS_CATEGORY, $result->cat_title );
 118                 $titleText = $this->getSkin()->link( $title, htmlspecialchars( $title->getText() ) );
 119                 $count = wfMsgExt( 'nmembers', array( 'parsemag', 'escape' ),
 120                                 $wgLang->formatNum( $result->cat_pages ) );
 121                 return Xml::tags('li', null, "$titleText ($count)" ) . "\n";
 122         }
 123
 124         public function getStartForm( $from ) {
 125                 global $wgScript;
 126                 $t = SpecialPage::getTitleFor( 'Categories' );
 127
 128                 return
 129                         Xml::tags( 'form', array( 'method' => 'get', 'action' => $wgScript ),
 130                                 Xml::hidden( 'title', $t->getPrefixedText() ) .
 131                                 Xml::fieldset( wfMsg( 'categories' ),
 132                                         Xml::inputLabel( wfMsg( 'categoriesfrom' ),
 133                                                 'from', 'from', 20, $from ) .
 134                                         ' ' .
 135                                         Xml::submitButton( wfMsg( 'allpagessubmit' ) ) ) );
 136         }
 137 }