<?php

namespace App\Service;

use Doctrine\ORM\EntityManagerInterface;
use App\Service\RedisClientProvider;
use App\Entity\Notification;

class NotificationManager
{
    protected $redis;
    protected $redis_mqtt_key;
    protected $em;

    const NOTIF_KEY = 'user/{user_id}/notification';

    public function __construct(RedisClientProvider $redis_prov, EntityManagerInterface $em, $redis_mqtt_key)
    {
        $this->redis = $redis_prov->getRedisClient();
        $this->redis_mqtt_key = $redis_mqtt_key;
        $this->em = $em;
    }

    // set user_id to 0 for all
    public function sendNotification($user_id, $msg, $url)
    {
        // send mqtt
        $chan = $this->getChannel($user_id);
        $data = $chan . '|' . $msg;
        $this->redis->lpush($this->redis_mqtt_key, $data);

        // create notif
        $notif = new Notification();
        $notif->setUserID($user_id)
            ->setIcon('')
            ->setMessage($msg)
            ->setURL($url);

        // save to db
        $this->em->persist($notif);
        $this->em->flush();
    }

    protected function getChannel($user_id)
    {
        return str_replace('{user_id}', $user_id, self::NOTIF_KEY );
    }
}