class.ilGroupNameAsMailValidator.php

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<?php declare(strict_types=1);
/* Copyright (c) 1998-2017 ILIAS open source, Extended GPL, see docs/LICENSE */

class ilGroupNameAsMailValidator
{
    protected $host;

    protected $groupNameCheckCallable;

    public function __construct(string $host, callable $groupNameCheckCallable = null)
    {
        $this->host = $host;

        if (null === $groupNameCheckCallable) {
            $groupNameCheckCallable = function (string $groupName) {
                return ilUtil::groupNameExists($groupName);
            };
        }

        $this->groupNameCheckCallable = $groupNameCheckCallable;
    }

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

        $func = $this->groupNameCheckCallable;
        if ($func($groupName) && $this->isHostValid($address->getHost())) {
            return true;
        }

        return false;
    }

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