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/*! ConnectNotification packet
*/

use super::*;

use tox_binary_io::*;
use crate::relay::connection_id::ConnectionId;

/** Sent by server to client.
Tell the client that connection_id is now connected meaning the other
is online and data can be sent using this `connection_id`.

Serialized form:

Length | Content
------ | ------
`1`    | `0x02`
`1`    | connection_id [ `0x10` .. `0xFF` ]

*/
#[derive(Debug, PartialEq, Clone)]
pub struct ConnectNotification {
    /// The id of the connected client
    pub connection_id: ConnectionId
}

impl FromBytes for ConnectNotification {
    named!(from_bytes<ConnectNotification>, do_parse!(
        tag!("\x02") >>
        connection_id: call!(ConnectionId::from_bytes) >>
        (ConnectNotification { connection_id })
    ));
}

impl ToBytes for ConnectNotification {
    fn to_bytes<'a>(&self, buf: (&'a mut [u8], usize)) -> Result<(&'a mut [u8], usize), GenError> {
        do_gen!(buf,
            gen_be_u8!(0x02) >>
            gen_call!(|buf, connection_id| ConnectionId::to_bytes(connection_id, buf), &self.connection_id)
        )
    }
}

#[cfg(test)]
mod test {
    use super::*;

    encode_decode_test!(
        tox_crypto::crypto_init().unwrap(),
        connect_notification_encode_decode,
        ConnectNotification {
            connection_id: ConnectionId::from_index(1)
        }
    );
}