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use mio::net::{TcpListener, TcpStream};
use std::io::{Read, Write};
use mio::{Poll, Token, Ready, PollOpt, Events};
use std::collections::{HashMap, HashSet};
use std::str::from_utf8;
use crate::cmd::buddy_list::create_buddy_list_notify_command;
use crate::cmd::text::{create_text_command, create_text_command_with_action};
use crate::cmd::property::{create_property_update_command, create_property_request_command};
use super::cmd::room::create_room_id_redirect_command;
use rand::Rng;
use crate::server::utils::broadcast_to_all_clients;
// pub struct ClientSocket {
// tcp_stream: TcpStream,
// username: String,
// }
pub struct AutoServer;
impl AutoServer {
pub fn new(listener: TcpListener) {
let poll = Poll::new().unwrap();
poll.register(
&listener,
Token(0),
Ready::readable(),
PollOpt::edge()
).unwrap();
let mut counter: usize = 0;
let mut sockets: HashMap<Token, TcpStream> = HashMap::new();
let mut requests: HashMap<Token, Vec<u8>> = HashMap::new();
let mut buffer = [0 as u8; 1024];
// let mut room_ids: HashMap<&str, i32> = HashMap::new();
let mut room_ids: HashSet<String> = HashSet::new();
let mut events = Events::with_capacity(1024);
loop {
poll.poll(&mut events, None).unwrap();
for event in &events {
match event.token() {
Token(0) => {
loop {
match listener.accept() {
Ok((socket, address)) => {
counter += 1;
let token = Token(counter);
poll.register(
&socket,
token,
Ready::readable(),
PollOpt::edge()
).unwrap();
info!(
"registered ip '{}' with token '{}'",
address.ip(), token.0
);
sockets.insert(token, socket);
requests.insert(token, Vec::with_capacity(192));
}
Err(ref e) if e.kind() == std::io::ErrorKind::WouldBlock =>
break,
Err(e) => {
error!("unexpected error: {}", e);
poll.deregister(sockets.get(&Token(counter)).unwrap()).unwrap();
break;
}
}
}
},
token if event.readiness().is_readable() => {
loop {
let read = sockets.get_mut(&token).unwrap().read(&mut buffer);
match read {
Ok(0) => { sockets.remove(&token); break; }
Ok(n) => {
let req = requests.get_mut(&token).unwrap();
for b in &buffer[0..n] {
req.push(*b);
}
// First byte means how long data section of the packet is.
// Second byte is to be determined.
// Third byte is the request type.
// Match packet type by descriptor; **third** byte.
match &buffer.get(2).unwrap() { // Third byte is 2 because Rust is zero-indexed.
// PROPREQ
10 => {
info!("received property request command");
sockets.get_mut(&token).unwrap()
.write_all(&create_property_update_command()).unwrap();
info!("sent property update");
}
// SESSINIT
6 => {
info!("received session initialization command");
sockets.get_mut(&token).unwrap()
.write_all(&create_property_request_command()).unwrap();
info!("sent session initialization command");
}
// PROPSET
15 => {
info!("received property set command");
sockets.get_mut(&token).unwrap()
.write_all(&create_text_command_with_action(
"WORLDSMASTER",
"Welcome to Whirlsplash!"
)).unwrap();
info!("sent worldsmaster greeting");
},
// BUDDYLISTUPDATE
29 => {
info!("received buddy list update command");
let received_buddy = from_utf8(
&buffer[4..*&buffer.get(3).unwrap().to_owned() as usize]
).unwrap();
debug!("received buddy: {}", received_buddy);
sockets.get_mut(&token).unwrap()
.write_all(&create_buddy_list_notify_command("Wirlaburla"))
.unwrap();
info!("sent buddy notify update command");
}
// ROOMIDRQ
20 => {
info!("received room id request command");
let room_name = from_utf8(
&buffer[4..*&buffer.get(0).unwrap().to_owned() as usize]
).unwrap();
let mut room_id = 0;
if !room_ids.contains(room_name) {
room_ids.insert(room_name.to_string());
room_id = room_ids.iter()
.position(|i| i == room_name)
.unwrap();
debug!("inserted room '{}' as '{}'", room_name, room_id);
} else {
let pos = room_ids
.iter()
.position(|i| i == room_name)
.unwrap();
debug!("found room '{}' as '{}'", room_name, pos);
room_id = pos;
}
debug!("room name: {}, room id: {}", room_name, room_id);
debug!("{:?}", room_ids);
// Passing `0` as `room_id` parameter as currently there is
// no way to find out a room's ID based on it's name.
sockets.get_mut(&token).unwrap()
.write_all(&create_room_id_redirect_command(room_name, room_id))
.unwrap();
info!("sent redirect id command")
}
// TEXT
14 => {
info!("received text command");
// TODO: Make this into a command!
let message = from_utf8(
&buffer[6..*&buffer.get(0).unwrap().to_owned() as usize]
).unwrap();
info!("message: {}", message);
// Using User as a placeholder. Ideally, this would print out the username of
// the one who sent it.
broadcast_to_all_clients(
&sockets,
&create_text_command(
// Random integer is added to the end of "User", just a development
// proof-of-concept. Since at this stage usernames aren't exactly kept,
// we can identify message senders as their connection token; `token.0`.
&format!("User{}", rand::thread_rng().gen_range(1..150).to_string()),
message
)
);
}
// SESSEXIT
7 => {
info!("received session termination command");
poll.deregister(sockets.get(&token).unwrap()).unwrap();
info!("de-registered client: {}", token.0);
}
// Anything else, do nothing.
_ => ()
}
}
Err(ref e) if e.kind() == std::io::ErrorKind::WouldBlock =>
break,
Err(e) => { error!("unexpected error: {}", e); break; }
}
}
// Unimplemented
// let ready = requests.get(&token).unwrap()
// .windows(4)
// .find(|window| is_double_crnl(*window))
// .is_some();
//
// if ready {
// let socket = sockets.get(&token).unwrap();
// poll.reregister(
// socket,
// token,
// Ready::writable(),
// PollOpt::edge() | PollOpt::oneshot()).unwrap();
// }
},
// Unimplemented
// token if event.readiness().is_writable() => {
// println!("writeable");
// requests.get_mut(&token).unwrap().clear();
// sockets.get_mut(&token).unwrap().write_all("test".as_bytes()).unwrap();
//
// // Re-use existing connection ("keep-alive") - switch back to reading
// poll.reregister(
// sockets.get(&token).unwrap(),
// token,
// Ready::readable(),
// PollOpt::edge()).unwrap();
// },
_ => ()
}
}
}
}
}
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