AllMessagesTablePager.php

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<?php
use MediaWiki\MediaWikiServices;
use MediaWiki\Linker\LinkRenderer;
use Wikimedia\Rdbms\FakeResultWrapper;

class AllMessagesTablePager extends TablePager {

    protected $langcode;

    protected $foreign;

    protected $prefix;

    protected $suffix;

    public $lang;

    public $custom;

    public function __construct( ?IContextSource $context, FormOptions $opts,
        LinkRenderer $linkRenderer
    ) {
        parent::__construct( $context, $linkRenderer );

        $this->mIndexField = 'am_title';
        // FIXME: Why does this need to be set to DIR_DESCENDING to produce ascending ordering?
        $this->mDefaultDirection = IndexPager::DIR_DESCENDING;

        $contLang = MediaWikiServices::getInstance()->getContentLanguage();
        $this->lang = wfGetLangObj( $opts->getValue( 'lang' ) );

        $this->langcode = $this->lang->getCode();
        $this->foreign = !$this->lang->equals( $contLang );

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

        $prefix = $this->getLanguage()->ucfirst( $opts->getValue( 'prefix' ) );
        $prefix = $prefix !== '' ?
            Title::makeTitleSafe( NS_MEDIAWIKI, $opts->getValue( 'prefix' ) ) :
            null;

        if ( $prefix !== null ) {
            $displayPrefix = $prefix->getDBkey();
            $this->prefix = '/^' . preg_quote( $displayPrefix, '/' ) . '/i';
        } else {
            $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 getAllMessages( $descending ) {
        $messageNames = Language::getLocalisationCache()->getSubitemList( 'en', 'messages' );

        // Normalise message names so they look like page titles and sort correctly - T86139
        $messageNames = array_map( [ $this->lang, 'ucfirst' ], $messageNames );

        if ( $descending ) {
            rsort( $messageNames );
        } else {
            asort( $messageNames );
        }

        return $messageNames;
    }

    public static function getCustomisedStatuses( $messageNames, $langcode = 'en', $foreign = false ) {
        // FIXME: This function should be moved to Language:: or something.

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

        $pageFlags = $talkFlags = [];

        foreach ( $res as $s ) {
            $exists = false;

            if ( $foreign ) {
                $titleParts = explode( '/', $s->page_title );
                if ( count( $titleParts ) === 2 &&
                    $langcode === $titleParts[1] &&
                    isset( $xNames[$titleParts[0]] )
                ) {
                    $exists = $titleParts[0];
                }
            } elseif ( isset( $xNames[$s->page_title] ) ) {
                $exists = $s->page_title;
            }

            $title = Title::newFromRow( $s );
            if ( $exists && $title->inNamespace( NS_MEDIAWIKI ) ) {
                $pageFlags[$exists] = true;
            } elseif ( $exists && $title->inNamespace( NS_MEDIAWIKI_TALK ) ) {
                $talkFlags[$exists] = true;
            }
        }

        return [ 'pages' => $pageFlags, 'talks' => $talkFlags ];
    }

    function reallyDoQuery( $offset, $limit, $order ) {
        $asc = ( $order === self::QUERY_ASCENDING );

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

        $rows = [];
        $count = 0;
        foreach ( $messageNames as $key ) {
            $customised = isset( $statuses['pages'][$key] );
            if ( $customised !== $this->custom &&
                ( $asc && ( $key < $offset || !$offset ) || !$asc && $key > $offset ) &&
                ( ( $this->prefix && preg_match( $this->prefix, $key ) ) || $this->prefix === false )
            ) {
                $actual = $this->msg( $key )->inLanguage( $this->lang )->plain();
                $default = $this->msg( $key )->inLanguage( $this->lang )->useDatabase( false )->plain();
                $rows[] = [
                    '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 new FakeResultWrapper( $rows );
    }

    protected function getStartBody() {
        $tableClass = $this->getTableClass();
        return Xml::openElement( 'table', [
            'class' => "mw-datatable $tableClass",
            '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>\n";
    }

    function getEndBody() {
        return Html::closeElement( 'table' );
    }

    function formatValue( $field, $value ) {
        $linkRenderer = $this->getLinkRenderer();
        switch ( $field ) {
            case 'am_title' :
                $title = Title::makeTitle( NS_MEDIAWIKI, $value . $this->suffix );
                $talk = Title::makeTitle( NS_MEDIAWIKI_TALK, $value . $this->suffix );
                $translation = Linker::makeExternalLink(
                    'https://translatewiki.net/w/i.php?' . wfArrayToCgi( [
                        'title' => 'Special:SearchTranslations',
                        'group' => 'mediawiki',
                        'grouppath' => 'mediawiki',
                        'language' => $this->getLanguage()->getCode(),
                        'query' => $value . ' ' . $this->msg( $value )->plain()
                    ] ),
                    $this->msg( 'allmessages-filter-translate' )->text()
                );
                $talkLink = $this->msg( 'talkpagelinktext' )->escaped();

                if ( $this->mCurrentRow->am_customised ) {
                    $title = $linkRenderer->makeKnownLink( $title, $this->getLanguage()->lcfirst( $value ) );
                } else {
                    $title = $linkRenderer->makeBrokenLink(
                        $title, $this->getLanguage()->lcfirst( $value )
                    );
                }
                if ( $this->mCurrentRow->am_talk_exists ) {
                    $talk = $linkRenderer->makeKnownLink( $talk, $talkLink );
                } else {
                    $talk = $linkRenderer->makeBrokenLink(
                        $talk,
                        $talkLink
                    );
                }

                return $title . ' ' .
                $this->msg( 'parentheses' )->rawParams( $talk )->escaped() .
                ' ' .
                $this->msg( 'parentheses' )->rawParams( $translation )->escaped();

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

        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 .= Html::openElement( 'tr', $this->getRowAttrs( $row ) );
            $formatted = strval( $this->formatValue( 'am_actual', $row->am_actual ) );

            if ( $formatted === '' ) {
                $formatted = "\u{00A0}";
            }

            $s .= Html::element( 'td', $this->getCellAttrs( 'am_actual', $row->am_actual ), $formatted )
                . Html::closeElement( 'tr' );
        }

        return Html::rawElement( 'tbody', [], $s );
    }

    function getRowAttrs( $row ) {
        return [];
    }

    function getCellAttrs( $field, $value ) {
        $attr = [];
        if ( $field === 'am_title' ) {
            if ( $this->mCurrentRow->am_customised ) {
                $attr += [ 'rowspan' => '2' ];
            }
        } else {
            $attr += [
                'lang' => $this->lang->getHtmlCode(),
                'dir' => $this->lang->getDir(),
            ];
            if ( $this->mCurrentRow->am_customised ) {
                // CSS class: am_default, am_actual
                $attr += [ 'class' => $field ];
            }
        }
        return $attr;
    }

    // This is not actually used, as getStartBody is overridden above
    function getFieldNames() {
        return [
            '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 [];
    }

}