class.ilGroupNameAsMailValidator.php

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<?php
/* Copyright (c) 1998-2017 ILIAS open source, Extended GPL, see docs/LICENSE */

class ilGroupNameAsMailValidator
{
    private $host;

    public function __construct($host)
    {
        $this->host = $host;
    }

    public function validate(\ilMailAddress $address)
    {
        $groupName = substr($address->getMailbox(), 1);

        if (ilUtil::groupNameExists($groupName) && $this->isHostValid($address->getHost())) {
            return true;
        }

        return false;
    }

    private function isHostValid($host)
    {
        return ($host == $this->host || 0 === strlen($host));
    }
}