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use std::collections::HashMap;
use std::io;
use json;
use json::JsonValue;
use super::server::Server;
enum Message {
Name(String),
Chat(String),
Input(JsonValue),
Invalid(String)
}
pub enum Action {
Join(String),
Leave(String),
Input(String, JsonValue)
}
pub struct GameServer {
players: HashMap<(usize, usize), String>,
connections: HashMap<String, (usize, usize)>,
servers: Vec<Box<Server>>
}
impl GameServer {
pub fn new(servers: Vec<Box<Server>>) -> GameServer {
GameServer {
players: HashMap::new(),
connections: HashMap::new(),
servers
}
}
pub fn update(&mut self) -> Vec<Action>{
for server in self.servers.iter_mut(){
let _ = server.accept_pending_connections();
}
let mut actions: Vec<Action> = Vec::new();
let mut input = Vec::new();
for (serverid, server) in self.servers.iter_mut().enumerate(){
let (messages, left) = server.recv_pending_messages();
input.push((serverid, messages, left));
}
for (serverid, messages, left) in input {
for (id, message) in messages {
let r = self.handle_message((serverid, id), parse_message(&message));
if let Some(action) = r {
actions.push(action);
}
}
for id in left {
if let Some(name) = self.players.remove(&(serverid, id)){
self.connections.remove(&name);
self.broadcast_message(&format!("{} disconnected", name));
actions.push(Action::Leave(name.clone()));
}
}
}
actions
}
fn send_error(&mut self, (serverid, connectionid): (usize, usize), errname: &str, err_text: &str) -> Result<(), io::Error>{
self.servers[serverid].send(connectionid, &json::stringify(json::array!["error", errname, err_text]))
}
pub fn broadcast_message(&mut self, text: &str){
println!("{}", text);
let jsontext = json::stringify(json::array!["message", text]);
for ((serverid, id), _name) in &self.players {
let _ = self.servers[*serverid].send(*id, &jsontext);
}
}
fn handle_message(&mut self, (serverid, connectionid): (usize, usize), msg: Message) -> Option<Action> {
let id = (serverid, connectionid);
match msg {
Message::Name(name) => {
let (firstchar, username) = name.split_at(1);
if firstchar == "~"{
if Some(username.to_string()) != self.servers[serverid].get_name(connectionid) {
let _ = self.send_error(id, "invalidname", &format!("A tilde name must match your username"));
return None;
}
}
if self.players.contains_key(&id) {
let _ = self.send_error(id, "invalidaction", &format!("You can not change your name"));
return None;
}
if self.connections.contains_key(&name) {
let _ = self.send_error(id, "nametaken", &format!("Another connections to this player exists already"));
return None;
}
self.broadcast_message(&format!("{} connected", name));
self.players.insert(id, name.clone());
self.connections.insert(name.clone(), id);
Some(Action::Join(name))
}
Message::Chat(text) => {
if let Some(name) = self.players.get(&id) {
self.broadcast_message(&format!("{}: {}", name, text));
} else {
let _ = self.send_error(id, "invalidaction", &format!("Set a name before you send other messages"));
}
None
}
Message::Input(_) => { None }
Message::Invalid(text) => {
let _ = self.send_error(id, "invalidmessage", &format!("Invalid: {}", text));
None
}
}
}
}
fn parse_message(msg: &str) -> Message {
if let Ok(data) = json::parse(msg) {
if let JsonValue::Array(arr) = data {
if arr.len() < 2 {
return Message::Invalid("array not long enough".to_string());
}
if let Some(msgtype) = arr[0].as_str() {
match msgtype {
"name" => {
if let Some(name) = arr[1].as_str(){
Message::Name(name.to_string())
} else {
Message::Invalid("name is not a string".to_string())
}
}
"chat" => {
if let Some(text) = arr[1].as_str(){
Message::Chat(text.to_string())
} else {
Message::Invalid("chat text is not a string".to_string())
}
}
"input" => {
Message::Input(arr[1].clone())
}
_ => {
Message::Invalid(format!("unknown messsage type {:?}", msgtype).to_string())
}
}
} else { Message::Invalid(format!("first array value not string: {:?}", arr[0].dump()).to_string()) }
} else { Message::Invalid("not json array".to_string()) }
} else { Message::Invalid("not json message".to_string()) }
}
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