wikimedia/mediawiki-extensions-Wikibase

<?php

namespace Wikibase\Repo\Specials\HTMLForm;

use InvalidArgumentException;
use MediaWiki\Context\IContextSource;
use MediaWiki\HTMLForm\Field\HTMLComboboxField;
use Wikibase\Lib\LanguageNameLookup;
use Wikibase\Repo\WikibaseRepo;

/**
 * Class representing generic content language selector field
 *
 * @license GPL-2.0-or-later
 */
class HTMLContentLanguageField extends HTMLComboboxField {

    /**
     * Can be used without label - has some predefined value.
     *  - Doesn't accept any of options parameters.
     *
     * @inheritDoc
     *
     * @see \HTMLForm There is detailed description of the allowed $params (named $info there).
     */
    public function __construct( array $params ) {
        $defaultParameters = [
            'label-message' => 'wikibase-content-language-edit-label',
        ];

        $parent = $params['parent'] ?? null;
        if ( !( $parent instanceof IContextSource ) ) {
            throw new InvalidArgumentException( 'parent option must be an IContextSource' );
        }
        $languageCode = $parent->getLanguage()->getCode();
        $params['default'] ??= $languageCode;

        if ( isset( $params['options'] )
             || isset( $params['options-message'] )
             || isset( $params['options-messages'] )
        ) {
            throw new InvalidArgumentException(
                "Cannot set options for content language field. It already has it's own options"
            );
        }

        $contentLanguages = WikibaseRepo::getTermsLanguages();
        $params['options'] = $this->constructOptions(
            $contentLanguages->getLanguages(),
            WikibaseRepo::getLanguageNameLookupFactory()->getForLanguageCode( $languageCode )
        );

        parent::__construct( array_merge( $defaultParameters, $params ) );
    }

    /**
     * @param string[] $languageCodes
     * @param LanguageNameLookup $lookup
     *
     * @return array For details see {@see \HTMLForm} "options" parameter description
     */
    private function constructOptions( array $languageCodes, LanguageNameLookup $lookup ) {
        $languageOptions = [];
        foreach ( $languageCodes as $code ) {
            $languageName = $lookup->getNameForTerms( $code );
            $languageOptions["$languageName ($code)"] = $code;
        }

        return $languageOptions;
    }

    public function validate( $value, $alldata ) {
        $options = $this->getOptions();
        if ( !in_array( $value, $options, true ) ) {
            return $this->msg( 'wikibase-content-language-edit-not-recognized-language' );
        }

        return parent::validate( $value, $alldata );
    }

}