SpecialUncategorizedpages.php

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<?php
// @todo FIXME: Make $requestedNamespace selectable, unify all subclasses into one
class UncategorizedPagesPage extends PageQueryPage {
        protected $requestedNamespace = false;

        function __construct( $name = 'Uncategorizedpages' ) {
                parent::__construct( $name );
        }

        function sortDescending() {
                return false;
        }

        function isExpensive() {
                return true;
        }

        function isSyndicated() {
                return false;
        }

        function getQueryInfo() {
                return array (
                        'tables' => array ( 'page', 'categorylinks' ),
                        'fields' => array ( 'namespace' => 'page_namespace',
                                        'title' => 'page_title',
                                        'value' => 'page_title' ),
                        // default for page_namespace is all content namespaces (if requestedNamespace is false)
                        // otherwise, page_namespace is requestedNamespace
                        'conds' => array ( 'cl_from IS NULL',
                                        'page_namespace' => ( $this->requestedNamespace!==false ? $this->requestedNamespace : MWNamespace::getContentNamespaces() ),
                                        'page_is_redirect' => 0 ),
                        'join_conds' => array ( 'categorylinks' => array (
                                        'LEFT JOIN', 'cl_from = page_id' ) )
                );
        }

        function getOrderFields() {
                // For some crazy reason ordering by a constant
                // causes a filesort
                if( $this->requestedNamespace === false && count( MWNamespace::getContentNamespaces() ) > 1 )
                        return array( 'page_namespace', 'page_title' );
                return array( 'page_title' );
        }
}