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use clientbound::ClientboundPacket;
use serverbound::ServerboundPacket;
use connection::Connection;
use ClientState;
use std::io;
use std::net::TcpStream;
/// Represents a single client connection, from the point of view of a server
pub struct Server {
conn: Connection<ServerboundPacket, ClientboundPacket>,
}
impl Server {
/// Create a new connection from an existing TcpStream
pub fn from_tcpstream(stream: TcpStream) -> io::Result<Self> {
Ok(Server {
conn: Connection::from_tcpstream(stream)?,
})
}
/// Try to read some packets from the client.
///
/// This function is nonblocking.
pub fn read(&mut self) -> io::Result<Vec<ServerboundPacket>> {
self.update_inbuf()?;
let mut ret = Vec::new();
loop {
if let Some(packet) = self.read_packet()? {
ret.push(packet);
} else {
break;
}
}
Ok(ret)
}
/// Send the given packet to the client
///
/// This function may block.
pub fn send(&mut self, packet: ClientboundPacket) -> io::Result<()> {
self.conn.send(packet)
}
/// Attempt to close this connection, disconnecting the client
///
/// All future sends and reads to this connection will fail.
pub fn close(&mut self) -> io::Result<()> {
self.conn.close()
}
/// Change the client state of this connection
pub fn set_clientstate(&mut self, new_state: ClientState) {
self.conn.set_clientstate(new_state)
}
/// Enable encryption with the given key.
///
/// It is an error to enable encryption if encryption has already been
/// enabled.
pub fn enable_encryption(&mut self, key: &[u8; 16]) {
self.conn.enable_encryption(key)
}
/// Enable compression.
///
/// It is generally an error to enable compression if compression has
/// already been enabled.
pub fn enable_compression(&mut self, threshold: usize) {
self.conn.enable_compression(threshold)
}
/// Read from the TcpStream and update the incoming buffer.
///
/// This is the only way to actually read from the TcpStream. Unless you
/// know for sure you need to call this, then you do not need to call this.
/// I.e. if you're just using server.read(), then you do not need to call
/// this function.
///
/// This function is nonblocking.
pub fn update_inbuf(&mut self) -> io::Result<()> {
self.conn.update_inbuf()
}
/// Read a single packet from the internal buffer.
///
/// This is only really useful if you want finegrained control over the
/// processing of packets, e.g. if you want to authenticate clients. In
/// most cases you'll just
/// want to use server.read()
///
/// You MUST be sure that server.update_inbuf() has been called before this,
/// this function will not attempt to read from the TcpStream, only from the
/// internal buffer.
pub fn read_packet(&mut self) -> io::Result<Option<ServerboundPacket>> {
self.conn.read_packet()
}
}