SpecialGadgets.php

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<?php
class SpecialGadgets extends SpecialPage {
    public function __construct() {
        parent::__construct( 'Gadgets', '', true );
    }
 
    public function execute( $par ) {
        $parts = explode( '/', $par );
 
        if ( count( $parts ) == 2 && $parts[0] == 'export' ) {
            $this->showExportForm( $parts[1] );
        } else {
            $this->showMainForm();
        }
    }
 
    private function makeAnchor( $gadgetName ) {
        return 'gadget-' . Sanitizer::escapeId( $gadgetName, [ 'noninitial' ] );
    }
 
    public function showMainForm() {
        global $wgContLang;
 
        $output = $this->getOutput();
        $this->setHeaders();
        $output->setPageTitle( $this->msg( 'gadgets-title' ) );
        $output->addWikiMsg( 'gadgets-pagetext' );
 
        $gadgets = GadgetRepo::singleton()->getStructuredList();
        if ( !$gadgets ) {
            return;
        }
 
        $output->disallowUserJs();
        $lang = $this->getLanguage();
        $langSuffix = "";
        if ( $lang->getCode() != $wgContLang->getCode() ) {
            $langSuffix = "/" . $lang->getCode();
        }
 
        $listOpen = false;
 
        $editInterfaceMessage = $this->getUser()->isAllowed( 'editinterface' )
            ? 'edit'
            : 'viewsource';
 
        $linkRenderer = $this->getLinkRenderer();
        foreach ( $gadgets as $section => $entries ) {
            if ( $section !== false && $section !== '' ) {
                $t = Title::makeTitleSafe( NS_MEDIAWIKI, "Gadget-section-$section$langSuffix" );
                $lnkTarget = $t
                    ? $linkRenderer->makeLink( $t, $this->msg( $editInterfaceMessage )->text(),
                        [], [ 'action' => 'edit' ] )
                    : htmlspecialchars( $section );
                $lnk = "&#160; &#160; [$lnkTarget]";
 
                $ttext = $this->msg( "gadget-section-$section" )->parse();
 
                if ( $listOpen ) {
                    $output->addHTML( Xml::closeElement( 'ul' ) . "\n" );
                    $listOpen = false;
                }
 
                $output->addHTML( Html::rawElement( 'h2', [], $ttext . $lnk ) . "\n" );
            }
 
            foreach ( $entries as $gadget ) {
                $name = $gadget->getName();
                $t = Title::makeTitleSafe( NS_MEDIAWIKI, "Gadget-{$name}$langSuffix" );
                if ( !$t ) {
                    continue;
                }
 
                $links = [];
                $links[] = $linkRenderer->makeLink(
                    $t,
                    $this->msg( $editInterfaceMessage )->text(),
                    [],
                    [ 'action' => 'edit' ]
                );
                $links[] = $linkRenderer->makeLink(
                    $this->getPageTitle( "export/{$name}" ),
                    $this->msg( 'gadgets-export' )->text()
                );
 
                $ttext = $this->msg( "gadget-{$name}" )->parse();
 
                if ( !$listOpen ) {
                    $listOpen = true;
                    $output->addHTML( Xml::openElement( 'ul' ) );
                }
 
                $actions = '&#160;&#160;' .
                    $this->msg( 'parentheses' )->rawParams( $lang->pipeList( $links ) )->escaped();
                $output->addHTML(
                    Xml::openElement( 'li', [ 'id' => $this->makeAnchor( $name ) ] ) .
                        $ttext . $actions . "<br />" .
                        $this->msg( 'gadgets-uses' )->escaped() .
                        $this->msg( 'colon-separator' )->escaped()
                );
 
                $lnk = [];
                foreach ( $gadget->getPeers() as $peer ) {
                    $lnk[] = Html::element(
                        'a',
                        [ 'href' => '#' . $this->makeAnchor( $peer ) ],
                        $peer
                    );
                }
                foreach ( $gadget->getScriptsAndStyles() as $codePage ) {
                    $t = Title::newFromText( $codePage );
 
                    if ( !$t ) {
                        continue;
                    }
 
                    $lnk[] = $linkRenderer->makeLink( $t, $t->getText() );
                }
                $output->addHTML( $lang->commaList( $lnk ) );
                if ( $gadget->getLegacyScripts() ) {
                    $output->addHTML( '<br />' . Html::rawElement(
                        'span',
                        [ 'class' => 'mw-gadget-legacy errorbox' ],
                        $this->msg( 'gadgets-legacy' )->parse()
                    ) );
                }
 
                $rights = [];
                foreach ( $gadget->getRequiredRights() as $right ) {
                    $rights[] = '* ' . $this->msg( "right-$right" )->plain();
                }
                if ( count( $rights ) ) {
                    $output->addHTML( '<br />' .
                            $this->msg( 'gadgets-required-rights', implode( "\n", $rights ), count( $rights ) )->parse()
                    );
                }
 
                $requiredSkins = $gadget->getRequiredSkins();
                // $requiredSkins can be an array or true (if all skins are supported)
                if ( is_array( $requiredSkins ) ) {
                    $skins = [];
                    $validskins = Skin::getSkinNames();
                    foreach ( $requiredSkins as $skinid ) {
                        if ( isset( $validskins[$skinid] ) ) {
                            $skins[] = $this->msg( "skinname-$skinid" )->plain();
                        } else {
                            $skins[] = $skinid;
                        }
                    }
                    if ( count( $skins ) ) {
                        $output->addHTML(
                            '<br />' .
                            $this->msg( 'gadgets-required-skins', $lang->commaList( $skins ) )
                                ->numParams( count( $skins ) )->parse()
                        );
                    }
                }
 
                if ( $gadget->isOnByDefault() ) {
                    $output->addHTML( '<br />' . $this->msg( 'gadgets-default' )->parse() );
                }
 
                $output->addHTML( Xml::closeElement( 'li' ) . "\n" );
            }
        }
 
        if ( $listOpen ) {
            $output->addHTML( Xml::closeElement( 'ul' ) . "\n" );
        }
    }
 
    public function showExportForm( $gadget ) {
        global $wgScript;
 
        $output = $this->getOutput();
        try {
            $g = GadgetRepo::singleton()->getGadget( $gadget );
        } catch ( InvalidArgumentException $e ) {
            $output->showErrorPage( 'error', 'gadgets-not-found', [ $gadget ] );
            return;
        }
 
        $this->setHeaders();
        $output->setPageTitle( $this->msg( 'gadgets-export-title' ) );
        $output->addWikiMsg( 'gadgets-export-text', $gadget, $g->getDefinition() );
 
        $exportList = "MediaWiki:gadget-$gadget\n";
        foreach ( $g->getScriptsAndStyles() as $page ) {
            $exportList .= "$page\n";
        }
 
        $output->addHTML( Html::openElement( 'form', [ 'method' => 'get', 'action' => $wgScript ] )
            . Html::hidden( 'title', SpecialPage::getTitleFor( 'Export' )->getPrefixedDBKey() )
            . Html::hidden( 'pages', $exportList )
            . Html::hidden( 'wpDownload', '1' )
            . Html::hidden( 'templates', '1' )
            . Xml::submitButton( $this->msg( 'gadgets-export-download' )->text() )
            . Html::closeElement( 'form' )
        );
    }
 
    protected function getGroupName() {
        return 'wiki';
    }
}