includes/CategoryPage.php

   1 <?php
   2 /**
   3  * Special handling for category description pages
   4  * Modelled after ImagePage.php
   5  *
   6 */
   7
   8 /**
   9  *
  10  */
  11 class CategoryPage extends Article {
  12
  13         function view() {
  14                 if ( NS_CATEGORY == $this->mTitle->getNamespace() ) {
  15                         $this->openShowCategory();
  16                 }
  17
  18                 Article::view();
  19
  20                 # If the article we've just shown is in the "Image" namespace,
  21                 # follow it with the history list and link list for the image
  22                 # it describes.
  23
  24                 if ( NS_CATEGORY == $this->mTitle->getNamespace() ) {
  25                         $this->closeShowCategory();
  26                 }
  27         }
  28
  29         function openShowCategory() {
  30                 # For overloading
  31         }
  32
  33         # generate a list of subcategories and pages for a category
  34         # depending on wfMsg("usenewcategorypage") it either calls the new
  35         # or the old code. The new code will not work properly for some
  36         # languages due to sorting issues, so they might want to turn it
  37         # off.
  38
  39         function closeShowCategory() {
  40                 global $wgOut;
  41                 $msg = wfMsg('usenewcategorypage');
  42                 if ( '0' == @$msg[0] )
  43                 {
  44                         $wgOut->addHTML( $this->oldCategoryMagic() );
  45                 } else {
  46                         $wgOut->addHTML( $this->newCategoryMagic() );
  47                 }
  48         }
  49
  50         # This method generates the list of subcategories and pages for a category
  51         function oldCategoryMagic () {
  52                 global $wgLang, $wgUser ;
  53                 $fname = 'CategoryPage::oldCategoryMagic';
  54
  55
  56                 $sk =& $wgUser->getSkin() ;
  57
  58                 $articles = array() ;
  59                 $children = array() ;
  60                 $r = '';
  61                 $id = $this->mTitle->getArticleID() ;
  62
  63                 # FIXME: add limits
  64                 $dbr =& wfGetDB( DB_SLAVE );
  65                 $cur = $dbr->tableName( 'cur' );
  66                 $categorylinks = $dbr->tableName( 'categorylinks' );
  67
  68                 $t = $dbr->strencode( $this->mTitle->getDBKey() );
  69                 $sql = "SELECT DISTINCT cur_title,cur_namespace FROM $cur,$categorylinks " .
  70                         "WHERE cl_to='$t' AND cl_from=cur_id ORDER BY cl_sortkey" ;
  71                 $res = $dbr->query( $sql, $fname ) ;
  72                 # For all pages that link to this category
  73                 while ( $x = $dbr->fetchObject ( $res ) )
  74                 {
  75                         $t = $wgLang->getNsText ( $x->cur_namespace ) ;
  76                         if ( $t != '' ) $t .= ':' ;
  77                         $t .= $x->cur_title ;
  78
  79                         if ( $x->cur_namespace == NS_CATEGORY ) {
  80                                 array_push ( $children , $sk->makeLink ( $t ) ) ; # Subcategory
  81                         } else {
  82                                 array_push ( $articles , $sk->makeLink ( $t ) ) ; # Page in this category
  83                         }
  84                 }
  85                 $dbr->freeResult ( $res ) ;
  86
  87                 # Showing subcategories
  88                 if ( count ( $children ) > 0 ) {
  89                         $r .= '<h2>'.wfMsg('subcategories')."</h2>\n" ;
  90                         $r .= implode ( ', ' , $children ) ;
  91                 }
  92
  93                 # Showing pages in this category
  94                 if ( count ( $articles ) > 0 ) {
  95                         $ti = $this->mTitle->getText() ;
  96                         $h =  wfMsg( 'category_header', $ti );
  97                         $r .= "<h2>$h</h2>\n" ;
  98                         $r .= implode ( ', ' , $articles ) ;
  99                 }
 100
 101                 return $r ;
 102         }
 103
 104         function newCategoryMagic () {
 105                 global $wgLang,$wgUser;
 106
 107                 $sk =& $wgUser->getSkin();
 108
 109                 $r = "<br style=\"clear:both;\"/>\n";
 110
 111                 $articles = array() ;
 112                 $articles_start_char = array();
 113                 $children = array() ;
 114                 $children_start_char = array();
 115                 $data = array () ;
 116                 $id = $this->mTitle->getArticleID() ;
 117
 118                 # FIXME: add limits
 119                 $dbr =& wfGetDB( DB_SLAVE );
 120                 $cur = $dbr->tableName( 'cur' );
 121                 $categorylinks = $dbr->tableName( 'categorylinks' );
 122
 123                 $t = $dbr->strencode( $this->mTitle->getDBKey() );
 124                 $sql = "SELECT DISTINCT cur_title,cur_namespace,cl_sortkey FROM " .
 125                         "$cur,$categorylinks WHERE cl_to='$t' AND cl_from=cur_id ORDER BY cl_sortkey" ;
 126                 $res = $dbr->query ( $sql ) ;
 127                 while ( $x = $dbr->fetchObject ( $res ) )
 128                 {
 129                         $t = $ns = $wgLang->getNsText ( $x->cur_namespace ) ;
 130                         if ( $t != '' ) $t .= ':' ;
 131                         $t .= $x->cur_title ;
 132
 133                         if ( $x->cur_namespace == NS_CATEGORY ) {
 134                                 $ctitle = str_replace( '_',' ',$x->cur_title );
 135                                 array_push ( $children, $sk->makeKnownLink ( $t, $ctitle ) ) ; # Subcategory
 136
 137                                 // If there's a link from Category:A to Category:B, the sortkey of the resulting
 138                                 // entry in the categorylinks table is Category:A, not A, which it SHOULD be.
 139                                 // Workaround: If sortkey == "Category:".$title, than use $title for sorting,
 140                                 // else use sortkey...
 141                                 if ( ($ns.':'.$ctitle) == $x->cl_sortkey ) {
 142                                         array_push ( $children_start_char, $wgLang->firstChar( $x->cur_title ) );
 143                                 } else {
 144                                         array_push ( $children_start_char, $wgLang->firstChar( $x->cl_sortkey ) ) ;
 145                                 }
 146                         } else {
 147                                 array_push ( $articles , $sk->makeKnownLink ( $t ) ) ; # Page in this category
 148                                 array_push ( $articles_start_char, $wgLang->firstChar( $x->cl_sortkey ) ) ;
 149                         }
 150                 }
 151                 $dbr->freeResult ( $res ) ;
 152
 153                 $ti = $this->mTitle->getText() ;
 154
 155                 # Don't show subcategories section if there are none.
 156                 if ( count ( $children ) > 0 )
 157                 {
 158                         # Showing subcategories
 159                         $r .= '<h2>' . wfMsg( 'subcategories' ) . "</h2>\n";
 160
 161                         $numchild = count( $children );
 162                         if($numchild == 1) {
 163                                 $r .= wfMsg( 'subcategorycount1', 1 );
 164                         } else {
 165                                 $r .= wfMsg( 'subcategorycount' , $numchild );
 166                         }
 167                         unset($numchild);
 168
 169                         if ( count ( $children ) > 6 ) {
 170
 171                                 // divide list into three equal chunks
 172                                 $chunk = (int) (count ( $children ) / 3);
 173
 174                                 // get and display header
 175                                 $r .= '<table width="100%"><tr valign="top">';
 176
 177                                 $startChunk = 0;
 178                                 $endChunk = $chunk;
 179
 180                                 // loop through the chunks
 181                                 for($startChunk = 0, $endChunk = $chunk, $chunkIndex = 0;
 182                                         $chunkIndex < 3;
 183                                         $chunkIndex++, $startChunk = $endChunk, $endChunk += $chunk + 1)
 184                                 {
 185
 186                                         $r .= '<td><ul>';
 187                                         // output all subcategories to category
 188                                         for ($index = $startChunk ;
 189                                                 $index < $endChunk && $index < count($children);
 190                                                 $index++ )
 191                                         {
 192                                                 // check for change of starting letter or begging of chunk
 193                                                 if ( ($children_start_char[$index] != $children_start_char[$index - 1])
 194                                                         || ($index == $startChunk) )
 195                                                 {
 196                                                         $r .= "</ul><h3>{$children_start_char[$index]}</h3>\n<ul>";
 197                                                 }
 198
 199                                                 $r .= "<li>{$children[$index]}</li>";
 200                                         }
 201                                         $r .= '</ul></td>';
 202
 203
 204                                 }
 205                                 $r .= '</tr></table>';
 206                         } else {
 207                                 // for short lists of subcategories to category.
 208
 209                                 $r .= "<h3>{$children_start_char[0]}</h3>\n";
 210                                 $r .= '<ul><li>'.$children[0].'</li>';
 211                                 for ($index = 1; $index < count($children); $index++ )
 212                                 {
 213                                         if ($children_start_char[$index] != $children_start_char[$index - 1])
 214                                         {
 215                                                 $r .= "</ul><h3>{$children_start_char[$index]}</h3>\n<ul>";
 216                                         }
 217                                         $r .= "<li>{$children[$index]}</li>";
 218                                 }
 219                                 $r .= '</ul>';
 220                         }
 221                 } # END of if ( count($children) > 0 )
 222
 223                 $r .= '<h2>' . wfMsg( 'category_header', $ti ) . "</h2>\n";
 224
 225                 $numart = count( $articles );
 226                 if($numart == 1) {
 227                         $r .= wfMsg( 'categoryarticlecount1', 1 );
 228                 } else {
 229                         $r .= wfMsg( 'categoryarticlecount' , $numart );
 230                 }
 231                 unset($numart);
 232
 233                 # Showing articles in this category
 234                 if ( count ( $articles ) > 6) {
 235                         $ti = $this->mTitle->getText() ;
 236
 237                         // divide list into three equal chunks
 238                         $chunk = (int) (count ( $articles ) / 3);
 239
 240                         // get and display header
 241                         $r .= '<table width="100%"><tr valign="top">';
 242
 243                         // loop through the chunks
 244                         for($startChunk = 0, $endChunk = $chunk, $chunkIndex = 0;
 245                                 $chunkIndex < 3;
 246                                 $chunkIndex++, $startChunk = $endChunk, $endChunk += $chunk + 1)
 247                         {
 248
 249                                 $r .= '<td><ul>';
 250
 251                                 // output all articles in category
 252                                 for ($index = $startChunk ;
 253                                         $index < $endChunk && $index < count($articles);
 254                                         $index++ )
 255                                 {
 256                                         // check for change of starting letter or begging of chunk
 257                                         if ( ($index == $startChunk) ||
 258                                              ($articles_start_char[$index] != $articles_start_char[$index - 1]) )
 259
 260                                         {
 261                                                 $r .= "</ul><h3>{$articles_start_char[$index]}</h3>\n<ul>";
 262                                         }
 263
 264                                         $r .= "<li>{$articles[$index]}</li>";
 265                                 }
 266                                 $r .= '</ul></td>';
 267
 268
 269                         }
 270                         $r .= '</tr></table>';
 271                 } elseif ( count($articles) > 0) {
 272                         // for short lists of articles in categories.
 273                         $ti = $this->mTitle->getText() ;
 274
 275                         $r .= '<h3>'.$articles_start_char[0]."</h3>\n";
 276                         $r .= '<ul><li>'.$articles[0].'</li>';
 277                         for ($index = 1; $index < count($articles); $index++ )
 278                         {
 279                                 if ($articles_start_char[$index] != $articles_start_char[$index - 1])
 280                                 {
 281                                         $r .= "</ul><h3>{$articles_start_char[$index]}</h3>\n<ul>";
 282                                 }
 283
 284                                 $r .= "<li>{$articles[$index]}</li>";
 285                         }
 286                         $r .= '</ul>';
 287                 }
 288
 289
 290                 return $r ;
 291         }
 292
 293
 294 }
 295
 296
 297 ?>