SiteSelector.php

<?php

namespace Company\Components;

defined('B_PROLOG_INCLUDED') || die();

class SiteSelector extends \CBitrixComponent
{
    /**
     * @var array
     */
    private $siteList = [];
    /**
     * @var string
     */
    private $defaultLang = 'en';

    /**
     * @return mixed|void|null
     */
    public function executeComponent()
    {
        if ($this->startResultCache()) {
            $this->arResult['LANGUAGES'] = $this->getLanguages();
            $this->arResult['SITES'] = $this->getSites();
            $currentSite = $this->getCurrentSite();
            if ($currentSite) {
                $this->arResult['CURRENT_LANG'] = $currentSite;
            }
            $this->includeComponentTemplate();
            $this->setResultCacheKeys(['SITES']);
            $this->endResultCache();
        }
        if ($this->request->getQuery('location') == true) {
            $lang = htmlspecialchars($this->request->getQuery('lang'));
            foreach ($this->arResult['SITES'] as $site) {
                if ($site['LANGUAGE_ID'] == $lang) {
                    $this->setSelectedCountry($lang);
                }
            }
        }
        $this->redirectUserToSite();
    }

    /**
     * @param $lang
     */
    private function setSelectedCountry($lang)
    {
        $_SESSION['USER_LANG'] = $lang;
    }

    /**
     * @return mixed
     */
    private function getSelectedCountry()
    {
        return $_SESSION['USER_LANG'];
    }

    /**
     * Ридирект на текущий раздел
     */
    private function redirectUserToSite()
    {
        global $APPLICATION;
        if (!$this->getSelectedCountry()) {
            $current = $this->getCurrentSite();
            $site = $this->getPreferredSite();
            if ($site['LANGUAGE_ID'] != $current['LANGUAGE_ID']) {
                LocalRedirect($site['DIR'] . str_replace($current['DIR'], '', $APPLICATION->GetCurDir()));
            }
        }
    }

    /**
     * Получить первый предпочитаемый язык для сайта
     *
     * @return array
     */
    private function getPreferredSite(): array
    {
        $userLanguages = $this->request->getAcceptedLanguages();
        $sites = $this->getSites();
        $arLangResult = [];
        foreach ($sites as $site) {
            foreach ($userLanguages as $sort => $language) {
                if (substr($language, 0, 2) == $site['LANGUAGE_ID']) {
                    $arLangResult[$sort] = $site;
                }
            }
        }
        if (empty($arLangResult)) {
            foreach ($sites as $site) {
                if ($this->defaultLang == $site['LANGUAGE_ID']) {
                    $arLangResult = [$site];
                }
            }
        }
        ksort($arLangResult);

        return array_shift($arLangResult);
    }

    /**
     * Возвращает список сайтов
     * @return array
     */
    private function getSites(): array
    {
        if (empty($this->siteList)) {
            $this->siteList = $this->loadSites();
        }
        return $this->siteList;
    }

    /**
     * Вовращает массив из всех языков для сайтов
     *
     * @return array
     */
    private function getLanguages(): array
    {
        $langs = [];
        $by = 'LANGUAGE_ID';
        $order = 'ASC';
        $rsLangs = \CLanguage::GetList($by, $order);
        while ($arLang = $rsLangs->Fetch()) {
            $langs[$arLang['ID']] = $arLang;
        }
        return $langs;
    }

    /**
     * Взять текущий сайт
     *
     * @return false|mixed
     */
    private function getCurrentSite()
    {
        $sites = $this->getSites();
        foreach ($sites as $site) {
            if ($site['LANGUAGE_ID'] == LANGUAGE_ID) {
                return $site;
            }
        }
        return false;
    }

    /**
     * Вовращает все активные сайты
     *
     * @return array
     */
    private function loadSites(): array
    {
        $sites = [];
        $by = 'LANGUAGE_ID';
        $order = 'ASC';
        $rsSites = \CSite::GetList($by, $order, ['ACTIVE' => 'Y']);
        while ($arSite = $rsSites->Fetch()) {
            $sites[] = $arSite;
        }
        return $sites;
    }
}