<?php

namespace app\components\i18n;

use yii;
use yii\i18n\MissingTranslationEvent;
use yii\i18n\PhpMessageSource as YiiPhpMessageSource;
use yii\log\Logger;

class PhpMessageSource extends YiiPhpMessageSource
{

    public function init()
    {
        parent::init();
        $this->_registerMissingTranslationHandler();
    }

    protected function _registerMissingTranslationHandler()
    {
        if (YII_ENV_DEV) {
            $this->on('missingTranslation', [$this, 'onMissingTranslation']);
        }
        return $this;
    }

    public function onMissingTranslation(MissingTranslationEvent $e)
    {
        yii::$app->getLog()->log("[{$e->category}:{$e->language}] - {$e->message}", Logger::LEVEL_INFO, 'i18n');
    }

}