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use crate::group::{Group, GroupId};
use crate::server::{UserId, GameClient,
ClientSender, ClientReceiver,
GameServerError};
use std::collections::HashMap;
use std::sync::{Arc, Mutex};
pub struct ScribbleGroup {
id: GroupId,
name: String,
senders: Arc<Mutex<HashMap<UserId, ClientSender>>>
}
impl Group for ScribbleGroup {
fn id(&self) -> GroupId {
self.id
}
fn group_type(&self) -> String {
"scribble".to_string()
}
fn name(&self) -> String {
self.name.clone()
}
fn run(&mut self) {
info!("a new group {}:'{}' runs now", self.id, self.name);
}
fn add_client(&mut self, id: UserId, client: GameClient) -> Result<(), GameServerError> {
debug!("user {} joined the group {}:'{}'", id, self.id, self.name);
let (sen, rec) = client.split();
self.senders.lock().unwrap().insert(id, sen);
let senders_mutex = self.senders.clone();
let self_uid = id;
std::thread::spawn(move || Self::broadcast_clients(self_uid, rec, senders_mutex));
Ok(())
}
}
impl ScribbleGroup {
pub fn new(id: GroupId, name: String) -> Self {
Self { id, name, senders: Arc::new(Mutex::new(HashMap::new())) }
}
fn broadcast_clients(self_uid: UserId, mut rec: ClientReceiver, senders_mutex: Arc<Mutex<HashMap<UserId, ClientSender>>>) {
loop {
let message = match rec.recv_message() {
Ok(x) => x,
_ => break
};
//trace!("got message: '{:?}'", message);
let mut senders = senders_mutex.lock().unwrap();
for (uid, sender) in senders.iter_mut() {
if self_uid != *uid {
sender.send_message(&message)
.unwrap_or_else(|_| debug!("tried to send message to {}, but failed", *uid));
}
}
}
senders_mutex.lock().unwrap().remove(&self_uid);
info!("client {} has left", self_uid);
}
}
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