Don't display multiple language links to the same language

[mediawiki.git] / includes / specials / SpecialAllmessages.php

<?php
/**
 * Implements Special:Allmessages
 *
 * 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
 */

/**
 * Use this special page to get a list of the MediaWiki system messages.
 *
 * @file
 * @ingroup SpecialPage
 */
class SpecialAllmessages extends SpecialPage {

        /**
         * @var AllmessagesTablePager
         */
        protected $table;

        /**
         * Constructor
         */
        public function __construct() {
                parent::__construct( 'Allmessages' );
        }

        /**
         * Show the special page
         *
         * @param $par Mixed: parameter passed to the page or null
         */
        public function execute( $par ) {
                $request = $this->getRequest();
                $out = $this->getOutput();

                $this->setHeaders();

                global $wgUseDatabaseMessages;
                if( !$wgUseDatabaseMessages ) {
                        $out->addWikiMsg( 'allmessagesnotsupportedDB' );
                        return;
                } else {
                        $this->outputHeader( 'allmessagestext' );
                }

                $out->addModuleStyles( 'mediawiki.special' );

                $this->table = new AllmessagesTablePager(
                        $this,
                        array(),
                        wfGetLangObj( $request->getVal( 'lang', $par ) )
                );

                $this->langcode = $this->table->lang->getCode();

                $out->addHTML( $this->table->buildForm() .
                        $this->table->getNavigationBar() .
                        $this->table->getBody() .
                        $this->table->getNavigationBar() );

        }

}

/**
 * Use TablePager for prettified output. We have to pretend that we're
 * getting data from a table when in fact not all of it comes from the database.
 */
class AllmessagesTablePager extends TablePager {

        protected $filter, $prefix, $langcode, $displayPrefix;

        public $mLimitsShown;

        /**
         * @var Language
         */
        public $lang;

        /**
         * @var null|bool
         */
        public $custom;

        function __construct( $page, $conds, $langObj = null ) {
                parent::__construct( $page->getContext() );
                $this->mIndexField = 'am_title';
                $this->mPage = $page;
                $this->mConds = $conds;
                $this->mDefaultDirection = true; // always sort ascending
                $this->mLimitsShown = array( 20, 50, 100, 250, 500, 5000 );

                global $wgContLang;

                $this->talk = $this->msg( 'talkpagelinktext' )->escaped();

                $this->lang = ( $langObj ? $langObj : $wgContLang );
                $this->langcode = $this->lang->getCode();
                $this->foreign  = $this->langcode != $wgContLang->getCode();

                $request = $this->getRequest();

                $this->filter = $request->getVal( 'filter', 'all' );
                if( $this->filter === 'all' ){
                        $this->custom = null; // So won't match in either case
                } else {
                        $this->custom = ($this->filter == 'unmodified');
                }

                $prefix = $this->getLanguage()->ucfirst( $request->getVal( 'prefix', '' ) );
                $prefix = $prefix != '' ? Title::makeTitleSafe( NS_MEDIAWIKI, $request->getVal( 'prefix', null ) ) : null;
                if( $prefix !== null ){
                        $this->displayPrefix = $prefix->getDBkey();
                        $this->prefix = '/^' . preg_quote( $this->displayPrefix ) . '/i';
                } else {
                        $this->displayPrefix = false;
                        $this->prefix = false;
                }

                // The suffix that may be needed for message names if we're in a
                // different language (eg [[MediaWiki:Foo/fr]]: $suffix = '/fr'
                if( $this->foreign ) {
                        $this->suffix = '/' . $this->langcode;
                } else {
                        $this->suffix = '';
                }
        }

        function buildForm() {
                global $wgScript;

                $attrs = array( 'id' => 'mw-allmessages-form-lang', 'name' => 'lang' );
                $msg = wfMessage( 'allmessages-language' );
                $langSelect = Xml::languageSelector( $this->langcode, false, null, $attrs, $msg );

                $out  = Xml::openElement( 'form', array( 'method' => 'get', 'action' => $wgScript, 'id' => 'mw-allmessages-form' ) ) .
                        Xml::fieldset( $this->msg( 'allmessages-filter-legend' )->text() ) .
                        Html::hidden( 'title', $this->getTitle()->getPrefixedText() ) .
                        Xml::openElement( 'table', array( 'class' => 'mw-allmessages-table' ) ) . "\n" .
                        '<tr>
                                <td class="mw-label">' .
                                        Xml::label( $this->msg( 'allmessages-prefix' )->text(), 'mw-allmessages-form-prefix' ) .
                                "</td>\n
                                <td class=\"mw-input\">" .
                                        Xml::input( 'prefix', 20, str_replace( '_', ' ', $this->displayPrefix ), array( 'id' => 'mw-allmessages-form-prefix' ) ) .
                                "</td>\n
                        </tr>
                        <tr>\n
                                <td class='mw-label'>" .
                                        $this->msg( 'allmessages-filter' )->escaped() .
                                "</td>\n
                                <td class='mw-input'>" .
                                        Xml::radioLabel( $this->msg( 'allmessages-filter-unmodified' )->text(),
                                                'filter',
                                                'unmodified',
                                                'mw-allmessages-form-filter-unmodified',
                                                ( $this->filter == 'unmodified' )
                                        ) .
                                        Xml::radioLabel( $this->msg( 'allmessages-filter-all' )->text(),
                                                'filter',
                                                'all',
                                                'mw-allmessages-form-filter-all',
                                                ( $this->filter == 'all' )
                                        ) .
                                        Xml::radioLabel( $this->msg( 'allmessages-filter-modified' )->text(),
                                                'filter',
                                                'modified',
                                                'mw-allmessages-form-filter-modified',
                                        ( $this->filter == 'modified' )
                                ) .
                                "</td>\n
                        </tr>
                        <tr>\n
                                <td class=\"mw-label\">" . $langSelect[0] . "</td>\n
                                <td class=\"mw-input\">" . $langSelect[1] . "</td>\n
                        </tr>" .

                        '<tr>
                                <td class="mw-label">' .
                                        Xml::label( $this->msg( 'table_pager_limit_label' )->text(), 'mw-table_pager_limit_label' ) .
                                '</td>
                                <td class="mw-input">' .
                                        $this->getLimitSelect() .
                                '</td>
                        <tr>
                                <td></td>
                                <td>' .
                                        Xml::submitButton( $this->msg( 'allmessages-filter-submit' )->text() ) .
                                "</td>\n
                        </tr>" .

                        Xml::closeElement( 'table' ) .
                        $this->getHiddenFields( array( 'title', 'prefix', 'filter', 'lang', 'limit' ) ) .
                        Xml::closeElement( 'fieldset' ) .
                        Xml::closeElement( 'form' );
                return $out;
        }

        function getAllMessages( $descending ) {
                wfProfileIn( __METHOD__ );
                $messageNames = Language::getLocalisationCache()->getSubitemList( 'en', 'messages' );
                if( $descending ){
                        rsort( $messageNames );
                } else {
                        asort( $messageNames );
                }

                // Normalise message names so they look like page titles
                $messageNames = array_map( array( $this->lang, 'ucfirst' ), $messageNames );

                wfProfileOut( __METHOD__ );
                return $messageNames;
        }

        /**
         * Determine which of the MediaWiki and MediaWiki_talk namespace pages exist.
         * Returns array( 'pages' => ..., 'talks' => ... ), where the subarrays have
         * an entry for each existing page, with the key being the message name and
         * value arbitrary.
         *
         * @param array $messageNames
         * @param string $langcode What language code
         * @param bool $foreign Whether the $langcode is not the content language
         * @return array: a 'pages' and 'talks' array with the keys of existing pages
         */
        public static function getCustomisedStatuses( $messageNames, $langcode = 'en', $foreign = false ) {
                // FIXME: This function should be moved to Language:: or something.
                wfProfileIn( __METHOD__ . '-db' );

                $dbr = wfGetDB( DB_SLAVE );
                $res = $dbr->select( 'page',
                        array( 'page_namespace', 'page_title' ),
                        array( 'page_namespace' => array( NS_MEDIAWIKI, NS_MEDIAWIKI_TALK ) ),
                        __METHOD__,
                        array( 'USE INDEX' => 'name_title' )
                );
                $xNames = array_flip( $messageNames );

                $pageFlags = $talkFlags = array();

                foreach ( $res as $s ) {
                        $exists = false;
                        if( $foreign ) {
                                $title = explode( '/', $s->page_title );
                                if( count( $title ) === 2 && $langcode == $title[1]
                                        && isset( $xNames[$title[0]] ) ) {
                                        $exists = $title[0];
                                }
                        } elseif( isset( $xNames[$s->page_title] ) ) {
                                $exists = $s->page_title;
                        }
                        if( $exists && $s->page_namespace == NS_MEDIAWIKI ) {
                                $pageFlags[$exists] = true;
                        } elseif( $exists && $s->page_namespace == NS_MEDIAWIKI_TALK ) {
                                $talkFlags[$exists] = true;
                        }
                }

                wfProfileOut( __METHOD__ . '-db' );

                return array( 'pages' => $pageFlags, 'talks' => $talkFlags );
        }

        /**
         *  This function normally does a database query to get the results; we need
         * to make a pretend result using a FakeResultWrapper.
         * @return FakeResultWrapper
         */
        function reallyDoQuery( $offset, $limit, $descending ) {
                $result = new FakeResultWrapper( array() );

                $messageNames = $this->getAllMessages( $descending );
                $statuses = self::getCustomisedStatuses( $messageNames, $this->langcode, $this->foreign );

                $count = 0;
                foreach( $messageNames as $key ) {
                        $customised = isset( $statuses['pages'][$key] );
                        if( $customised !== $this->custom &&
                                ( $descending && ( $key < $offset || !$offset ) || !$descending && $key > $offset ) &&
                                ( ( $this->prefix && preg_match( $this->prefix, $key ) ) || $this->prefix === false )
                        ) {
                                $actual = wfMessage( $key )->inLanguage( $this->langcode )->plain();
                                $default = wfMessage( $key )->inLanguage( $this->langcode )->useDatabase( false )->plain();
                                $result->result[] = array(
                                        'am_title'      => $key,
                                        'am_actual'     => $actual,
                                        'am_default'    => $default,
                                        'am_customised' => $customised,
                                        'am_talk_exists' => isset( $statuses['talks'][$key] )
                                );
                                $count++;
                        }
                        if( $count == $limit ) {
                                break;
                        }
                }
                return $result;
        }

        function getStartBody() {
                return Xml::openElement( 'table', array( 'class' => 'mw-datatable TablePager', 'id' => 'mw-allmessagestable' ) ) . "\n" .
                        "<thead><tr>
                                <th rowspan=\"2\">" .
                                        $this->msg( 'allmessagesname' )->escaped() . "
                                </th>
                                <th>" .
                                        $this->msg( 'allmessagesdefault' )->escaped() .
                                "</th>
                        </tr>\n
                        <tr>
                                <th>" .
                                        $this->msg( 'allmessagescurrent' )->escaped() .
                                "</th>
                        </tr></thead><tbody>\n";
        }

        function formatValue( $field, $value ){
                switch( $field ){

                        case 'am_title' :

                                $title = Title::makeTitle( NS_MEDIAWIKI, $value . $this->suffix );
                                $talk  = Title::makeTitle( NS_MEDIAWIKI_TALK, $value . $this->suffix );

                                if( $this->mCurrentRow->am_customised ){
                                        $title = Linker::linkKnown( $title, $this->getLanguage()->lcfirst( $value ) );
                                } else {
                                        $title = Linker::link(
                                                $title,
                                                $this->getLanguage()->lcfirst( $value ),
                                                array(),
                                                array(),
                                                array( 'broken' )
                                        );
                                }
                                if ( $this->mCurrentRow->am_talk_exists ) {
                                        $talk = Linker::linkKnown( $talk , $this->talk );
                                } else {
                                        $talk = Linker::link(
                                                $talk,
                                                $this->talk,
                                                array(),
                                                array(),
                                                array( 'broken' )
                                        );
                                }
                                return $title . ' ' . $this->msg( 'parentheses' )->rawParams( $talk )->escaped();

                        case 'am_default' :
                        case 'am_actual' :
                                return Sanitizer::escapeHtmlAllowEntities( $value, ENT_QUOTES );
                }
                return '';
        }

        function formatRow( $row ){
                // Do all the normal stuff
                $s = parent::formatRow( $row );

                // But if there's a customised message, add that too.
                if( $row->am_customised ){
                        $s .= Xml::openElement( 'tr', $this->getRowAttrs( $row, true ) );
                        $formatted = strval( $this->formatValue( 'am_actual', $row->am_actual ) );
                        if ( $formatted == '' ) {
                                $formatted = '&#160;';
                        }
                        $s .= Xml::tags( 'td', $this->getCellAttrs( 'am_actual', $row->am_actual ), $formatted )
                                . "</tr>\n";
                }
                return $s;
        }

        function getRowAttrs( $row, $isSecond = false ){
                $arr = array();
                if( $row->am_customised ){
                        $arr['class'] = 'allmessages-customised';
                }
                if( !$isSecond ){
                        $arr['id'] = Sanitizer::escapeId( 'msg_' . $this->getLanguage()->lcfirst( $row->am_title ) );
                }
                return $arr;
        }

        function getCellAttrs( $field, $value ){
                if( $this->mCurrentRow->am_customised && $field == 'am_title' ){
                        return array( 'rowspan' => '2', 'class' => $field );
                } elseif( $field == 'am_title' ) {
                        return array( 'class' => $field );
                } else {
                        return array( 'lang' => $this->langcode, 'dir' => $this->lang->getDir(), 'class' => $field );
                }
        }

        // This is not actually used, as getStartBody is overridden above
        function getFieldNames() {
                return array(
                        'am_title' => $this->msg( 'allmessagesname' )->text(),
                        'am_default' => $this->msg( 'allmessagesdefault' )->text()
                );
        }

        function getTitle() {
                return SpecialPage::getTitleFor( 'Allmessages', false );
        }

        function isFieldSortable( $x ){
                return false;
        }

        function getDefaultSort(){
                return '';
        }

        function getQueryInfo(){
                return '';
        }
}