class.ilMailOnlyExternalAddressList.php

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<?php

declare(strict_types=1);

class ilMailOnlyExternalAddressList implements ilMailAddressList
{
    protected $get_usr_id_by_login_callable;

    public function __construct(
        protected ilMailAddressList $origin,
        protected string $installation_host,
        callable $get_usr_id_by_login_callable
    ) {
        $this->get_usr_id_by_login_callable = $get_usr_id_by_login_callable;
    }

    public function value(): array
    {
        $addresses = $this->origin->value();

        return array_filter($addresses, function (ilMailAddress $address): bool {
            if (($this->get_usr_id_by_login_callable)((string) $address)) {
                // Fixed mantis bug #5875
                return false;
            }

            if ($address->getHost() === $this->installation_host) {
                return false;
            }

            return !str_starts_with($address->getMailbox(), '#');
        });
    }
}