includes/SpecialAllpages.php

   1 <?php
   2 /**
   3  * @addtogroup SpecialPage
   4  */
   5
   6 /**
   7  * Entry point : initialise variables and call subfunctions.
   8  * @param $par String: becomes "FOO" when called like Special:Allpages/FOO (default NULL)
   9  * @param $specialPage See the SpecialPage object.
  10  */
  11 function wfSpecialAllpages( $par=NULL, $specialPage ) {
  12         global $wgRequest, $wgOut, $wgContLang;
  13
  14         # GET values
  15         $from = $wgRequest->getVal( 'from' );
  16         $namespace = $wgRequest->getInt( 'namespace' );
  17
  18         $namespaces = $wgContLang->getNamespaces();
  19
  20         $indexPage = new SpecialAllpages();
  21
  22         $wgOut->setPagetitle( ( $namespace > 0 && in_array( $namespace, array_keys( $namespaces) ) )  ?
  23                 wfMsg( 'allinnamespace', str_replace( '_', ' ', $namespaces[$namespace] ) ) :
  24                 wfMsg( 'allarticles' )
  25                 );
  26
  27         if ( isset($par) ) {
  28                 $indexPage->showChunk( $namespace, $par, $specialPage->including() );
  29         } elseif ( isset($from) ) {
  30                 $indexPage->showChunk( $namespace, $from, $specialPage->including() );
  31         } else {
  32                 $indexPage->showToplevel ( $namespace, $specialPage->including() );
  33         }
  34 }
  35
  36 /**
  37  * Implements Special:Allpages
  38  * @addtogroup SpecialPage
  39  */
  40 class SpecialAllpages {
  41         var $maxPerPage=960;
  42         var $topLevelMax=50;
  43         var $name='Allpages';
  44         # Determines, which message describes the input field 'nsfrom' (->SpecialPrefixindex.php)
  45         var $nsfromMsg='allpagesfrom';
  46
  47 /**
  48  * HTML for the top form
  49  * @param integer $namespace A namespace constant (default NS_MAIN).
  50  * @param string $from Article name we are starting listing at.
  51  */
  52 function namespaceForm ( $namespace = NS_MAIN, $from = '' ) {
  53         global $wgScript, $wgContLang;
  54         $t = SpecialPage::getTitleFor( $this->name );
  55         $align = $wgContLang->isRtl() ? 'left' : 'right';
  56
  57         $out  = Xml::openElement( 'div', array( 'class' => 'namespaceoptions' ) );
  58         $out .= Xml::openElement( 'form', array( 'method' => 'get', 'action' => $wgScript ) );
  59         $out .= Xml::hidden( 'title', $t->getPrefixedText() );
  60         $out .= Xml::openElement( 'table', array( 'id' => 'nsselect', 'class' => 'allpages' ) );
  61         $out .= "<tr>
  62                         <td align='$align'>" .
  63                                 Xml::label( wfMsg( $this->nsfromMsg ), 'nsfrom' ) .
  64                         "</td>
  65                         <td>" .
  66                                 Xml::input( 'from', 20, htmlspecialchars ( $from ), array( 'id' => 'nsfrom' ) ) .
  67                         "</td>
  68                 </tr>
  69                 <tr>
  70                         <td align='$align'>" .
  71                                 Xml::label( wfMsg( 'namespace' ), 'namespace' ) .
  72                         "</td>
  73                         <td>" .
  74                                 Xml::namespaceSelector( $namespace, null ) .
  75                                 Xml::submitButton( wfMsg( 'allpagessubmit' ) ) .
  76                         "</td>
  77                         </tr>";
  78         $out .= Xml::closeElement( 'table' );
  79         $out .= Xml::closeElement( 'form' );
  80         $out .= Xml::closeElement( 'div' );
  81         return $out;
  82 }
  83
  84 /**
  85  * @param integer $namespace (default NS_MAIN)
  86  */
  87 function showToplevel ( $namespace = NS_MAIN, $including = false ) {
  88         global $wgOut, $wgContLang;
  89         $fname = "indexShowToplevel";
  90         $align = $wgContLang->isRtl() ? 'left' : 'right';
  91
  92         # TODO: Either make this *much* faster or cache the title index points
  93         # in the querycache table.
  94
  95         $dbr = wfGetDB( DB_SLAVE );
  96         $out = "";
  97         $where = array( 'page_namespace' => $namespace );
  98
  99         global $wgMemc;
 100         $key = wfMemcKey( 'allpages', 'ns', $namespace );
 101         $lines = $wgMemc->get( $key );
 102
 103         if( !is_array( $lines ) ) {
 104                 $options = array( 'LIMIT' => 1 );
 105                 if ( ! $dbr->implicitOrderby() ) {
 106                         $options['ORDER BY'] = 'page_title';
 107                 }
 108                 $firstTitle = $dbr->selectField( 'page', 'page_title', $where, $fname, $options );
 109                 $lastTitle = $firstTitle;
 110
 111                 # This array is going to hold the page_titles in order.
 112                 $lines = array( $firstTitle );
 113
 114                 # If we are going to show n rows, we need n+1 queries to find the relevant titles.
 115                 $done = false;
 116                 for( $i = 0; !$done; ++$i ) {
 117                         // Fetch the last title of this chunk and the first of the next
 118                         $chunk = is_null( $lastTitle )
 119                                 ? ''
 120                                 : 'page_title >= ' . $dbr->addQuotes( $lastTitle );
 121                         $res = $dbr->select(
 122                                 'page', /* FROM */
 123                                 'page_title', /* WHAT */
 124                                 $where + array( $chunk),
 125                                 $fname,
 126                                 array ('LIMIT' => 2, 'OFFSET' => $this->maxPerPage - 1, 'ORDER BY' => 'page_title') );
 127
 128                         if ( $s = $dbr->fetchObject( $res ) ) {
 129                                 array_push( $lines, $s->page_title );
 130                         } else {
 131                                 // Final chunk, but ended prematurely. Go back and find the end.
 132                                 $endTitle = $dbr->selectField( 'page', 'MAX(page_title)',
 133                                         array(
 134                                                 'page_namespace' => $namespace,
 135                                                 $chunk
 136                                         ), $fname );
 137                                 array_push( $lines, $endTitle );
 138                                 $done = true;
 139                         }
 140                         if( $s = $dbr->fetchObject( $res ) ) {
 141                                 array_push( $lines, $s->page_title );
 142                                 $lastTitle = $s->page_title;
 143                         } else {
 144                                 // This was a final chunk and ended exactly at the limit.
 145                                 // Rare but convenient!
 146                                 $done = true;
 147                         }
 148                         $dbr->freeResult( $res );
 149                 }
 150                 $wgMemc->add( $key, $lines, 3600 );
 151         }
 152
 153         // If there are only two or less sections, don't even display them.
 154         // Instead, display the first section directly.
 155         if( count( $lines ) <= 2 ) {
 156                 $this->showChunk( $namespace, '', $including );
 157                 return;
 158         }
 159
 160         # At this point, $lines should contain an even number of elements.
 161         $out .= "<table class='allpageslist' style='background: inherit;'>";
 162         while ( count ( $lines ) > 0 ) {
 163                 $inpoint = array_shift ( $lines );
 164                 $outpoint = array_shift ( $lines );
 165                 $out .= $this->showline ( $inpoint, $outpoint, $namespace, false );
 166         }
 167         $out .= '</table>';
 168         $nsForm = $this->namespaceForm ( $namespace, '', false );
 169
 170         # Is there more?
 171         if ( $including ) {
 172                 $out2 = '';
 173         } else {
 174                 $morelinks = '';
 175                 if ( $morelinks != '' ) {
 176                         $out2 = '<table style="background: inherit;" width="100%" cellpadding="0" cellspacing="0" border="0">';
 177                         $out2 .= '<tr valign="top"><td>' . $nsForm;
 178                         $out2 .= '</td><td align="' . $align . '" style="font-size: smaller; margin-bottom: 1em;">';
 179                         $out2 .= $morelinks . '</td></tr></table><hr />';
 180                 } else {
 181                         $out2 = $nsForm . '<hr />';
 182                 }
 183         }
 184
 185         $wgOut->addHtml( $out2 . $out );
 186 }
 187
 188 /**
 189  * @todo Document
 190  * @param string $from
 191  * @param integer $namespace (Default NS_MAIN)
 192  */
 193 function showline( $inpoint, $outpoint, $namespace = NS_MAIN ) {
 194         global $wgContLang;
 195         $align = $wgContLang->isRtl() ? 'left' : 'right';
 196         $inpointf = htmlspecialchars( str_replace( '_', ' ', $inpoint ) );
 197         $outpointf = htmlspecialchars( str_replace( '_', ' ', $outpoint ) );
 198         $queryparams = ($namespace ? "namespace=$namespace" : '');
 199         $special = SpecialPage::getTitleFor( $this->name, $inpoint );
 200         $link = $special->escapeLocalUrl( $queryparams );
 201
 202         $out = wfMsgHtml(
 203                 'alphaindexline',
 204                 "<a href=\"$link\">$inpointf</a></td><td><a href=\"$link\">",
 205                 "</a></td><td><a href=\"$link\">$outpointf</a>"
 206         );
 207         return '<tr><td align="' . $align . '">'.$out.'</td></tr>';
 208 }
 209
 210 /**
 211  * @param integer $namespace (Default NS_MAIN)
 212  * @param string $from list all pages from this name (default FALSE)
 213  */
 214 function showChunk( $namespace = NS_MAIN, $from, $including = false ) {
 215         global $wgOut, $wgUser, $wgContLang;
 216
 217         $fname = 'indexShowChunk';
 218         $sk = $wgUser->getSkin();
 219
 220         $fromList = $this->getNamespaceKeyAndText($namespace, $from);
 221         $namespaces = $wgContLang->getNamespaces();
 222         $align = $wgContLang->isRtl() ? 'left' : 'right';
 223
 224         $n = 0;
 225
 226         if ( !$fromList ) {
 227                 $out = wfMsgWikiHtml( 'allpagesbadtitle' );
 228         } elseif ( !in_array( $namespace, array_keys( $namespaces ) ) ) {
 229                 // Show errormessage and reset to NS_MAIN
 230                 $out = wfMsgExt( 'allpages-bad-ns', array( 'parseinline' ), $namespace );
 231                 $namespace = NS_MAIN;
 232         } else {
 233                 list( $namespace, $fromKey, $from ) = $fromList;
 234
 235                 $dbr = wfGetDB( DB_SLAVE );
 236                 $res = $dbr->select( 'page',
 237                         array( 'page_namespace', 'page_title', 'page_is_redirect' ),
 238                         array(
 239                                 'page_namespace' => $namespace,
 240                                 'page_title >= ' . $dbr->addQuotes( $fromKey )
 241                         ),
 242                         $fname,
 243                         array(
 244                                 'ORDER BY'  => 'page_title',
 245                                 'LIMIT'     => $this->maxPerPage + 1,
 246                                 'USE INDEX' => 'name_title',
 247                         )
 248                 );
 249
 250                 $out = '<table style="background: inherit;" border="0" width="100%">';
 251
 252                 while( ($n < $this->maxPerPage) && ($s = $dbr->fetchObject( $res )) ) {
 253                         $t = Title::makeTitle( $s->page_namespace, $s->page_title );
 254                         if( $t ) {
 255                                 $link = ($s->page_is_redirect ? '<div class="allpagesredirect">' : '' ) .
 256                                         $sk->makeKnownLinkObj( $t, htmlspecialchars( $t->getText() ), false, false ) .
 257                                         ($s->page_is_redirect ? '</div>' : '' );
 258                         } else {
 259                                 $link = '[[' . htmlspecialchars( $s->page_title ) . ']]';
 260                         }
 261                         if( $n % 3 == 0 ) {
 262                                 $out .= '<tr>';
 263                         }
 264                         $out .= "<td>$link</td>";
 265                         $n++;
 266                         if( $n % 3 == 0 ) {
 267                                 $out .= '</tr>';
 268                         }
 269                 }
 270                 if( ($n % 3) != 0 ) {
 271                         $out .= '</tr>';
 272                 }
 273                 $out .= '</table>';
 274         }
 275
 276         if ( $including ) {
 277                 $out2 = '';
 278         } else {
 279                 if( $from == '' ) {
 280                         // First chunk; no previous link.
 281                         $prevTitle = null;
 282                 } else {
 283                         # Get the last title from previous chunk
 284                         $dbr = wfGetDB( DB_SLAVE );
 285                         $res_prev = $dbr->select(
 286                                 'page',
 287                                 'page_title',
 288                                 array( 'page_namespace' => $namespace, 'page_title < '.$dbr->addQuotes($from) ),
 289                                 $fname,
 290                                 array( 'ORDER BY' => 'page_title DESC', 'LIMIT' => $this->maxPerPage, 'OFFSET' => ($this->maxPerPage - 1 ) )
 291                         );
 292
 293                         # Get first title of previous complete chunk
 294                         if( $dbr->numrows( $res_prev ) >= $this->maxPerPage ) {
 295                                 $pt = $dbr->fetchObject( $res_prev );
 296                                 $prevTitle = Title::makeTitle( $namespace, $pt->page_title );
 297                         } else {
 298                                 # The previous chunk is not complete, need to link to the very first title
 299                                 # available in the database
 300                                 $options = array( 'LIMIT' => 1 );
 301                                 if ( ! $dbr->implicitOrderby() ) {
 302                                         $options['ORDER BY'] = 'page_title';
 303                                 }
 304                                 $reallyFirstPage_title = $dbr->selectField( 'page', 'page_title', array( 'page_namespace' => $namespace ), $fname, $options );
 305                                 # Show the previous link if it s not the current requested chunk
 306                                 if( $from != $reallyFirstPage_title ) {
 307                                         $prevTitle =  Title::makeTitle( $namespace, $reallyFirstPage_title );
 308                                 } else {
 309                                         $prevTitle = null;
 310                                 }
 311                         }
 312                 }
 313
 314                 $nsForm = $this->namespaceForm ( $namespace, $from );
 315                 $out2 = '<table style="background: inherit;" width="100%" cellpadding="0" cellspacing="0" border="0">';
 316                 $out2 .= '<tr valign="top"><td>' . $nsForm;
 317                 $out2 .= '</td><td align="' . $align . '" style="font-size: smaller; margin-bottom: 1em;">' .
 318                                 $sk->makeKnownLink( $wgContLang->specialPage( "Allpages" ),
 319                                         wfMsgHtml ( 'allpages' ) );
 320
 321                 $self = SpecialPage::getTitleFor( 'Allpages' );
 322
 323                 # Do we put a previous link ?
 324                 if( isset( $prevTitle ) &&  $pt = $prevTitle->getText() ) {
 325                         $q = 'from=' . $prevTitle->getPartialUrl() . ( $namespace ? '&namespace=' . $namespace : '' );
 326                         $prevLink = $sk->makeKnownLinkObj( $self, wfMsgHTML( 'prevpage', $pt ), $q );
 327                         $out2 .= ' | ' . $prevLink;
 328                 }
 329
 330                 if( $n == $this->maxPerPage && $s = $dbr->fetchObject($res) ) {
 331                         # $s is the first link of the next chunk
 332                         $t = Title::MakeTitle($namespace, $s->page_title);
 333                         $q = 'from=' . $t->getPartialUrl() . ( $namespace ? '&namespace=' . $namespace : '' );
 334                         $nextLink = $sk->makeKnownLinkObj( $self, wfMsgHtml( 'nextpage', $t->getText() ), $q );
 335                         $out2 .= ' | ' . $nextLink;
 336                 }
 337                 $out2 .= "</td></tr></table><hr />";
 338         }
 339
 340         $wgOut->addHtml( $out2 . $out );
 341         if( isset($prevLink) or isset($nextLink) ) {
 342                 $wgOut->addHtml( '<hr /><p style="font-size: smaller; float: ' . $align . '">' );
 343                 if( isset( $prevLink ) ) {
 344                         $wgOut->addHTML( $prevLink );
 345                 }
 346                 if( isset( $prevLink ) && isset( $nextLink ) ) {
 347                         $wgOut->addHTML( ' | ' );
 348                 }
 349                 if( isset( $nextLink ) ) {
 350                         $wgOut->addHTML( $nextLink );
 351                 }
 352                 $wgOut->addHTML( '</p>' );
 353
 354         }
 355
 356 }
 357
 358 /**
 359  * @param int $ns the namespace of the article
 360  * @param string $text the name of the article
 361  * @return array( int namespace, string dbkey, string pagename ) or NULL on error
 362  * @static (sort of)
 363  * @access private
 364  */
 365 function getNamespaceKeyAndText ($ns, $text) {
 366         if ( $text == '' )
 367                 return array( $ns, '', '' ); # shortcut for common case
 368
 369         $t = Title::makeTitleSafe($ns, $text);
 370         if ( $t && $t->isLocal() ) {
 371                 return array( $t->getNamespace(), $t->getDBkey(), $t->getText() );
 372         } else if ( $t ) {
 373                 return NULL;
 374         }
 375
 376         # try again, in case the problem was an empty pagename
 377         $text = preg_replace('/(#|$)/', 'X$1', $text);
 378         $t = Title::makeTitleSafe($ns, $text);
 379         if ( $t && $t->isLocal() ) {
 380                 return array( $t->getNamespace(), '', '' );
 381         } else {
 382                 return NULL;
 383         }
 384 }
 385 }
 386
 387 ?>