<?php

namespace Trinity\Bundle\NewsletterBundle\Model;

use Trinity\Bundle\NewsletterBundle\Model\om\BaseNewsletter;
use \FOS\UserBundle\Propel\UserQuery;
use \FOS\UserBundle\Propel\GroupQuery;
use \FOS\UserBundle\Propel\UserPeer;

class Newsletter extends BaseNewsletter
{
    public function __toString()
    {
        if($this->sent_at) {
            return sprintf('%s envoyé le : %s',$this->name,$this->getSentAt('d/m/Y H:i:s'));
        }
        return sprintf('%s modifier le : %s',$this->name,$this->getUpdatedAt('d/m/Y H:i:s'));
    }

    public function getRecipients()
    {
        $email_list = explode(',', $this->getEmailListing());
        $users_mail = $this->getUserByGroups();

        return array_diff(
			array_unique(
				array_merge(
				$email_list,
				$users_mail)
			), 
			$this->getUnsubscribed()
		);
    }

    private function getUnsubscribed()
    {
        $blck_group = GroupQuery::create()->filterByCode('BLACKLIST')->findOne();

        if (!$blck_group) {
            throw new \Exception('You must define a group with "BLACKLIST" code in order to allow user\'s unsubscribe');
        }

        return UserQuery::create()->select(UserPeer::EMAIL)->filterByGroup($blck_group)->find()->toArray();
    }

    private function getUserByGroups()
    {
        if (!$this->getGroups()) {
            return array();
        }

        $user_query = UserQuery::create()->select(UserPeer::EMAIL);

        $group_iterator = new \ArrayIterator($this->getGroups());

        while ($group = $group_iterator->current()) {
            $user_query->filterByGroup($group);
            $group_iterator->next();

            if ($group_iterator->current()) {
                $user_query->_or();
            }
        }

        return $user_query->find()->toArray();
    }
}