SpecialWithoutinterwiki.php

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<?php
class WithoutInterwikiPage extends PageQueryPage {
    private $prefix = '';

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

    function execute( $par ) {
        $this->prefix = Title::capitalize(
            $this->getRequest()->getVal( 'prefix', $par ), NS_MAIN );
        parent::execute( $par );
    }

    function getPageHeader() {
        # Do not show useless input form if special page is cached
        if ( $this->isCached() ) {
            return '';
        }

        $prefix = $this->prefix;
        $t = $this->getPageTitle();

        return Html::openElement( 'form', array( 'method' => 'get', 'action' => wfScript() ) ) . "\n" .
            Html::openElement( 'fieldset' ) . "\n" .
            Html::element( 'legend', null, $this->msg( 'withoutinterwiki-legend' )->text() ) . "\n" .
            Html::hidden( 'title', $t->getPrefixedText() ) . "\n" .
            Xml::inputLabel(
                $this->msg( 'allpagesprefix' )->text(),
                'prefix',
                'wiprefix',
                20,
                $prefix
            ) . "\n" .
            Xml::submitButton( $this->msg( 'withoutinterwiki-submit' )->text() ) . "\n" .
            Html::closeElement( 'fieldset' ) . "\n" .
            Html::closeElement( 'form' );
    }

    function sortDescending() {
        return false;
    }

    function getOrderFields() {
        return array( 'page_namespace', 'page_title' );
    }

    function isExpensive() {
        return true;
    }

    function isSyndicated() {
        return false;
    }

    function getQueryInfo() {
        $query = array(
            'tables' => array( 'page', 'langlinks' ),
            'fields' => array(
                'namespace' => 'page_namespace',
                'title' => 'page_title',
                'value' => 'page_title'
            ),
            'conds' => array(
                'll_title IS NULL',
                'page_namespace' => MWNamespace::getContentNamespaces(),
                'page_is_redirect' => 0
            ),
            'join_conds' => array( 'langlinks' => array( 'LEFT JOIN', 'll_from = page_id' ) )
        );
        if ( $this->prefix ) {
            $dbr = wfGetDB( DB_SLAVE );
            $query['conds'][] = 'page_title ' . $dbr->buildLike( $this->prefix, $dbr->anyString() );
        }

        return $query;
    }

    protected function getGroupName() {
        return 'maintenance';
    }
}