Rafalsky/HomeFinance

<?php

/*
 * This file is part of the HomeFinanceV2 project.
 *
 * (c) Rafalsky.com <http://github.com/Rafalsky/>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace common\behaviors;

use yii\base\Behavior;
use yii\web\Application;

/**
 * Class LocaleBehavior
 * @package common\behaviors
 */
class LocaleBehavior extends Behavior
{
    /**
     * @var string
     */
    public $cookieName = '_locale';

    /**
     * @var bool
     */
    public $enablePreferredLanguage = true;
    /**
     * @return array
     */
    public function events()
    {
        return [
            Application::EVENT_BEFORE_REQUEST => 'beforeRequest'
        ];
    }

    /**
     * Resolve application language by checking user cookies, preferred language and profile settings
     */
    public function beforeRequest()
    {
        $hasCookie = \Yii::$app->getRequest()->getCookies()->has($this->cookieName);
        $forceUpdate = \Yii::$app->session->hasFlash('forceUpdateLocale');
        if ($hasCookie && !$forceUpdate) {
            $locale = \Yii::$app->getRequest()->getCookies()->getValue($this->cookieName);
        } else {
            $locale = $this->resolveLocale();
        }
        \Yii::$app->language = $locale;
    }

    public function resolveLocale()
    {
        $locale = \Yii::$app->language;

        if (!\Yii::$app->user->isGuest && \Yii::$app->user->identity->userProfile->locale) {
            $locale = \Yii::$app->user->getIdentity()->userProfile->locale;
        } elseif ($this->enablePreferredLanguage) {
            $locale = \Yii::$app->request->getPreferredLanguage($this->getAvailableLocales());
        }

        return $locale;
    }

    /**
     * @return array
     */
    protected function getAvailableLocales()
    {
        return array_keys(\Yii::$app->params['availableLocales']);
    }
}