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<?php
/**
* Implements Special:Disambiguations
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
* http://www.gnu.org/copyleft/gpl.html
*
* @file
* @ingroup SpecialPage
*/
/**
* A special page that lists pages containing links to disambiguations pages
*
* @ingroup SpecialPage
*/
class DisambiguationsPage extends QueryPage {
function __construct( $name = 'Disambiguations' ) {
parent::__construct( $name );
}
function isExpensive() {
return true;
}
function isSyndicated() {
return false;
}
function getPageHeader() {
return $this->msg( 'disambiguations-text' )->parseAsBlock();
}
/**
* @return string|bool False on failure
*/
function getQueryFromLinkBatch() {
$dbr = wfGetDB( DB_SLAVE );
$dMsgText = $this->msg( 'disambiguationspage' )->inContentLanguage()->text();
$linkBatch = new LinkBatch;
# If the text can be treated as a title, use it verbatim.
# Otherwise, pull the titles from the links table
$dp = Title::newFromText( $dMsgText );
if( $dp ) {
if( $dp->getNamespace() != NS_TEMPLATE ) {
# @todo FIXME: We assume the disambiguation message is a template but
# the page can potentially be from another namespace :/
wfDebug("Mediawiki:disambiguationspage message does not refer to a template!\n");
}
$linkBatch->addObj( $dp );
} else {
# Get all the templates linked from the Mediawiki:Disambiguationspage
$disPageObj = Title::makeTitleSafe( NS_MEDIAWIKI, 'disambiguationspage' );
$res = $dbr->select(
array('pagelinks', 'page'),
'pl_title',
array('page_id = pl_from',
'pl_namespace' => NS_TEMPLATE,
'page_namespace' => $disPageObj->getNamespace(),
'page_title' => $disPageObj->getDBkey()),
__METHOD__ );
foreach ( $res as $row ) {
$linkBatch->addObj( Title::makeTitle( NS_TEMPLATE, $row->pl_title ));
}
}
$set = $linkBatch->constructSet( 'tl', $dbr );
if( $set === false ) {
# We must always return a valid SQL query, but this way
# the DB will always quickly return an empty result
$set = 'FALSE';
wfDebug( "Mediawiki:disambiguationspage message does not link to any templates!\n" );
}
return $set;
}
function getQueryInfo() {
// @todo FIXME: What are pagelinks and p2 doing here?
return array (
'tables' => array(
'templatelinks',
'p1' => 'page',
'pagelinks',
'p2' => 'page'
),
'fields' => array(
'namespace' => 'p1.page_namespace',
'title' => 'p1.page_title',
'value' => 'pl_from'
),
'conds' => array(
$this->getQueryFromLinkBatch(),
'p1.page_id = tl_from',
'pl_namespace = p1.page_namespace',
'pl_title = p1.page_title',
'p2.page_id = pl_from',
'p2.page_namespace' => MWNamespace::getContentNamespaces()
)
);
}
function getOrderFields() {
return array( 'tl_namespace', 'tl_title', 'value' );
}
function sortDescending() {
return false;
}
/**
* Fetch links and cache their existence
*
* @param $db DatabaseBase
* @param $res
*/
function preprocessResults( $db, $res ) {
if ( !$res->numRows() ) {
return;
}
$batch = new LinkBatch;
foreach ( $res as $row ) {
$batch->add( $row->namespace, $row->title );
}
$batch->execute();
$res->seek( 0 );
}
function formatResult( $skin, $result ) {
$title = Title::newFromID( $result->value );
$dp = Title::makeTitle( $result->namespace, $result->title );
$from = Linker::link( $title );
$edit = Linker::link(
$title,
$this->msg( 'parentheses', $this->msg( 'editlink' )->text() )->escaped(),
array(),
array( 'redirect' => 'no', 'action' => 'edit' )
);
$arr = $this->getLanguage()->getArrow();
$to = Linker::link( $dp );
return "$from $edit $arr $to";
}
}
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