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use std::error::Error;
use crate::server::auto::cmd::property::{
create_property_update_command,
create_property_request_command
};
use crate::server::cmd::text::{create_text_command_with_action, create_text_command};
use std::str::from_utf8;
use crate::server::cmd::buddy_list::create_buddy_list_notify_command;
use crate::server::auto::cmd::room::create_room_id_redirect_command;
use crate::server::auto::cmd::session::parse_session_initialization_command;
use crate::server::parser::get_commands_from_buffer;
use crate::server::cmd::property::parse_property_set_command;
use crate::config::get_config;
use mio::{Poll, Events, Token, Interest, Registry};
use mio::net::{TcpListener, TcpStream};
use std::collections::HashMap;
use mio::event::Event;
use std::io::{Read, ErrorKind, Write};
use bytes::BytesMut;
const SERVER: Token = Token(0);
pub struct AutoServer {
pub clients: HashMap<Token, String>,
pub connections: HashMap<Token, TcpStream>,
pub room_ids: Vec<String>,
}
impl AutoServer {
pub fn listen(&mut self, addr: &str) -> Result<(), Box<dyn Error>> {
let mut server = TcpListener::bind(addr.parse().unwrap())?;
let mut poll = Poll::new()?;
let mut events = Events::with_capacity(1024);
let mut unique_token = Token(SERVER.0 + 1);
poll.registry().register(
&mut server,
SERVER,
Interest::READABLE
)?;
debug!("AutoServer now listening on {}", server.local_addr().unwrap());
loop {
poll.poll(&mut events, None)?;
for event in &events {
match event.token() {
SERVER => loop {
let (mut stream, address) = match server.accept() {
Ok((stream, address)) => (stream, address),
Err(e) if e.kind() == std::io::ErrorKind::WouldBlock => break,
Err(e) => return Err(Box::new(e)),
};
let token = AutoServer::next(&mut unique_token);
poll.registry().register(
&mut stream,
token,
Interest::READABLE, //.add(Interest::WRITABLE),
)?;
self.connections.insert(token, stream);
debug!("registered peer with address '{}' as '{}'", address, token.0);
},
token => {
// let done = if let Some(stream) = self.connections.get_mut(&token) {
// self.process(
// poll.registry(),
// event,
// token,
// )?
// } else {
// false
// };
let done = self.process(
poll.registry(),
event,
token,
)?;
if done { self.connections.remove(&token); }
}
}
}
}
}
fn next(current: &mut Token) -> Token {
let next = current.0;
current.0 += 1;
Token(next)
}
fn broadcast(mut self, cmd: &[u8]) -> () {
self.connections.iter_mut()
.for_each(|c|
c.1.write_all(cmd).unwrap()
);
}
fn process(
&mut self,
_registry: &Registry,
event: &Event,
token: Token,
) -> Result<bool, Box<dyn Error>> {
if event.is_readable() {
let mut connection_closed = false;
let mut received_data = vec![0; 4096];
let mut bytes_read = 0;
let stream = self.connections.get_mut(&token).unwrap();
loop {
match stream.read(&mut received_data[bytes_read..]) {
Ok(0) => {
connection_closed = true;
break;
}
Ok(n) => {
bytes_read += n;
if bytes_read == received_data.len() {
received_data.resize(received_data.len() + 1024, 0);
}
}
Err(ref err) if err.kind() == ErrorKind::WouldBlock => break,
Err(ref err) if err.kind() == ErrorKind::Interrupted => continue,
Err(err) => return Err(Box::new(err)),
}
}
if bytes_read != 0 {
self.handle(
&mut received_data[..bytes_read],
token,
);
}
if connection_closed {
println!("de-registered peer with token '{}'", token.0);
return Ok(true);
}
}
Ok(false)
}
fn handle(
&mut self,
data: &[u8],
// stream: &mut TcpStream,
token: Token,
) -> () {
// trace!("i am client: {:?}", self.clients.get(&token));
// debug!("{:?}", self.connections);
for cmd in get_commands_from_buffer(BytesMut::from(data)) {
debug!("received: {:?}", cmd);
match cmd.get(2).unwrap() {
10 => { // PROPREQ
debug!("received property request command from client 'null'");
self.connections.get_mut(&token).unwrap()
.write_all(&create_property_update_command()).unwrap();
debug!("sent property update command to client 'null'");
}
6 => { // SESSINIT
let local_username =
parse_session_initialization_command(cmd).username;
self.clients.insert(token, local_username.clone());
debug!(
"received session initialization command from client '{}'",
local_username,
);
self.connections.get_mut(&token).unwrap()
.write_all(&create_property_request_command()).unwrap();
debug!("sent session initialization command to client '{}'", local_username);
}
15 => { // PROPSET
let avatar = parse_property_set_command(cmd);
debug!(
"received property set command from client '{}': {}",
self.clients.get(&token).unwrap(),
avatar,
);
self.connections.get_mut(&token).unwrap()
.write_all(&create_text_command_with_action(
"WORLDSMASTER", &get_config().unwrap().worldsmaster_greeting,
)).unwrap();
debug!(
"sent session initialization command to client '{}'",
self.clients.get(&token).unwrap(),
);
}
29 => { // BUDDYLISTUPDATE
let received_buddy = from_utf8(
cmd.get(4..cmd.get(0).unwrap().to_owned() as usize - 1).unwrap()
).unwrap();
debug!(
"received buddy list update command from client '{}': {}",
self.clients.get(&token).unwrap(),
received_buddy,
);
self.connections.get_mut(&token).unwrap()
.write_all(&create_buddy_list_notify_command(received_buddy)).unwrap();
debug!(
"sent buddy list notify command to client '{}'",
self.clients.get(&token).unwrap(),
);
}
20 => { // ROOMIDRQ
let room_name = from_utf8(
cmd.get(4..cmd.get(0).unwrap().to_owned() as usize).unwrap()
).unwrap();
debug!(
"received room id request command from client '{}': {}",
self.clients.get(&token).unwrap(),
room_name,
);
let room_id;
if !self.room_ids.contains(&room_name.to_string()) {
self.room_ids.push(room_name.to_string());
room_id = self.room_ids.iter()
.position(|i| i == &room_name.to_string())
.unwrap();
trace!("inserted room '{}' as '{}'", room_name, room_id);
} else {
let position = self.room_ids.iter()
.position(|i| i == &room_name.to_string())
.unwrap();
trace!("found room '{}' as '{}'", room_name, position);
room_id = position;
}
trace!("room name: {}, room id: {}", room_name, room_id);
trace!("{:?}", self.room_ids);
self.connections.get_mut(&token).unwrap()
.write_all(&create_room_id_redirect_command(
room_name, room_id,
)).unwrap();
}
14 => { // TEXT
let text = from_utf8(
cmd.get(6..cmd.get(0).unwrap().to_owned() as usize).unwrap()
).unwrap();
let username = self.clients.get(&token).unwrap().clone();
debug!(
"received text command from client '{}': {}",
username, text,
);
self.connections.iter_mut().for_each(|t|
t.1.write_all(&create_text_command(
&username,
text,
)).unwrap()
);
debug!("broadcasted text command to clients");
}
7 => { // SESSEXIT
debug!(
"received session exit command from client '{}'",
self.clients.get(&token).unwrap(),
);
}
_ => (),
}
}
}
}
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