class imap
{
    private $server     = '';
    private $username   = '';
    private $password   = '';
    private $port       = 143;
    private $type       = 'IMAP';
    private $ssl        = true;

    /**
     * @var resource $stream
     */
    private $stream = NULL;

    public function getEmails( $onlyUnread = false )
    {
        $ssl = '';
    
        if( $this->ssl )
        {
            $ssl = '/ssl';
        }
    
        $mailbox = sprintf( "{%s:%d/%s%s/novalidate-cert}INBOX", $this->server, $this->port, $this->type, $ssl );
        $this->stream = imap_open( $mailbox, $this->username, $this->password );
        $MC = imap_check( $this->stream );
        $emails = imap_fetch_overview( $this->stream, "1:{$MC->Nmsgs}", 0 );

        if( $onlyUnread ) // nur ungelesene E-Mails
        {
            foreach( $emails as $key=>$email )
            {
                if( $email->seen ) // Email wurde bereits gelesen
                {
                    unset( $emails[$key] ); // Email aus Liste entfernen
                }
            }
        }

        return $emails;
    }

    public function getEmailBody( $uid )
    {
        $body = imap_fetchbody( $this->stream, $uid, 1 );
        return imap_qprint( $body );
    }

    /**
     * @param string $uid
     * @return bool|string
     */
    public function getAttachments( $uid )
    {
        $structure = imap_fetchstructure( $this->stream, $uid );

        foreach( $structure->parts as $key=>$part )
        {
            if( isset( $part->disposition ) && $part->disposition === 'attachment' )
            {
                $attachment = imap_fetchbody( $this->stream, $uid, $key+1, FT_INTERNAL );
                return str_replace( '=0A=', '', $attachment ); // Zeilenumbrueche
            }
        }

        return false;
    }

    public function close()
    {
        if( $this->stream !== false )
        {
            imap_close( $this->stream );
        }
    }
}