rust/hedgewars-server/src/server/handlers.rs
author alfadur
Wed, 10 Apr 2019 18:12:30 +0300
changeset 14804 b3adc030104b
parent 14802 01f8ab45f806
child 14805 8390d5e4e39c
permissions -rw-r--r--
implement server vars
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use mio;
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use std::{collections::HashMap, io, io::Write};
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use super::{
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    actions::{Destination, DestinationRoom},
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    core::HWServer,
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    coretypes::{ClientId, RoomId},
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    room::RoomSave,
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};
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use crate::{
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    protocol::messages::{server_chat, HWProtocolMessage, HWServerMessage, HWServerMessage::*},
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    server::actions::PendingMessage,
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    utils,
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};
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use base64::encode;
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use log::*;
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use rand::{thread_rng, RngCore};
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mod checker;
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mod common;
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mod inroom;
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mod lobby;
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mod loggingin;
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use self::loggingin::LoginResult;
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use std::fmt::{Formatter, LowerHex};
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#[derive(PartialEq)]
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pub struct Sha1Digest([u8; 20]);
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impl Sha1Digest {
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    pub fn new(digest: [u8; 20]) -> Self {
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        Self(digest)
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    }
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}
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impl LowerHex for Sha1Digest {
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    fn fmt(&self, f: &mut Formatter) -> Result<(), std::fmt::Error> {
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        for byte in &self.0 {
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            write!(f, "{:02x}", byte)?;
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        }
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        Ok(())
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    }
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}
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pub struct AccountInfo {
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    pub is_registered: bool,
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    pub is_admin: bool,
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    pub is_contributor: bool,
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    pub server_hash: Sha1Digest,
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}
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pub enum IoTask {
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    GetAccount {
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        nick: String,
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        protocol: u16,
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        password_hash: String,
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        client_salt: String,
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        server_salt: String,
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    },
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    SaveRoom {
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        room_id: RoomId,
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        filename: String,
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        contents: String,
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    },
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    LoadRoom {
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        room_id: RoomId,
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        filename: String,
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    },
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}
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pub enum IoResult {
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    Account(Option<AccountInfo>),
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    SaveRoom(RoomId, bool),
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    LoadRoom(RoomId, Option<String>),
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}
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pub struct Response {
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    client_id: ClientId,
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    messages: Vec<PendingMessage>,
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    io_tasks: Vec<IoTask>,
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    removed_clients: Vec<ClientId>,
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}
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impl Response {
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    pub fn new(client_id: ClientId) -> Self {
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        Self {
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            client_id,
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            messages: vec![],
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            io_tasks: vec![],
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            removed_clients: vec![],
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        }
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    }
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    #[inline]
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    pub fn is_empty(&self) -> bool {
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        self.messages.is_empty() && self.removed_clients.is_empty() && self.io_tasks.is_empty()
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    }
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    #[inline]
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    pub fn len(&self) -> usize {
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        self.messages.len()
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    }
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    #[inline]
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    pub fn client_id(&self) -> ClientId {
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        self.client_id
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    }
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    #[inline]
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    pub fn add(&mut self, message: PendingMessage) {
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        self.messages.push(message)
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    }
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    #[inline]
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    pub fn request_io(&mut self, task: IoTask) {
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        self.io_tasks.push(task)
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    }
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    pub fn extract_messages<'a, 'b: 'a>(
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        &'b mut self,
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        server: &'a HWServer,
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    ) -> impl Iterator<Item = (Vec<ClientId>, HWServerMessage)> + 'a {
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        let client_id = self.client_id;
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        self.messages.drain(..).map(move |m| {
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            let ids = get_recipients(server, client_id, &m.destination);
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            (ids, m.message)
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        })
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    }
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    pub fn remove_client(&mut self, client_id: ClientId) {
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        self.removed_clients.push(client_id);
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    }
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    pub fn extract_removed_clients(&mut self) -> impl Iterator<Item = ClientId> + '_ {
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        self.removed_clients.drain(..)
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    }
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    pub fn extract_io_tasks(&mut self) -> impl Iterator<Item = IoTask> + '_ {
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        self.io_tasks.drain(..)
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    }
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}
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impl Extend<PendingMessage> for Response {
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    fn extend<T: IntoIterator<Item = PendingMessage>>(&mut self, iter: T) {
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        for msg in iter {
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            self.add(msg)
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        }
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    }
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}
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fn get_recipients(
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    server: &HWServer,
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    client_id: ClientId,
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    destination: &Destination,
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) -> Vec<ClientId> {
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    let mut ids = match *destination {
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        Destination::ToSelf => vec![client_id],
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        Destination::ToId(id) => vec![id],
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        Destination::ToAll {
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            room_id: DestinationRoom::Lobby,
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            ..
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        } => server.collect_lobby_clients(),
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        Destination::ToAll {
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            room_id: DestinationRoom::Room(id),
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            ..
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        } => server.collect_room_clients(id),
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        Destination::ToAll {
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            protocol: Some(proto),
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            ..
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        } => server.protocol_clients(proto),
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        Destination::ToAll { .. } => server.clients.iter().map(|(id, _)| id).collect::<Vec<_>>(),
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    };
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    if let Destination::ToAll {
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        skip_self: true, ..
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    } = destination
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    {
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        if let Some(index) = ids.iter().position(|id| *id == client_id) {
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            ids.remove(index);
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        }
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    }
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    ids
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}
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pub fn handle(
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    server: &mut HWServer,
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    client_id: ClientId,
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    response: &mut Response,
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    message: HWProtocolMessage,
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) {
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    match message {
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        HWProtocolMessage::Ping => response.add(Pong.send_self()),
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        HWProtocolMessage::Malformed => warn!("Malformed/unknown message"),
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        HWProtocolMessage::Empty => warn!("Empty message"),
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        _ => {
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            if server.anteroom.clients.contains(client_id) {
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                match loggingin::handle(server, client_id, response, message) {
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                    LoginResult::Unchanged => (),
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                    LoginResult::Complete => {
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                        if let Some(client) = server.anteroom.remove_client(client_id) {
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                            server.add_client(client_id, client);
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                            common::join_lobby(server, response);
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                        }
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                    }
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                    LoginResult::Exit => {
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                        server.anteroom.remove_client(client_id);
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                        response.remove_client(client_id);
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                    }
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                }
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            } else {
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                match message {
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                    HWProtocolMessage::Quit(Some(msg)) => {
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                        common::remove_client(server, response, "User quit: ".to_string() + &msg);
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                    }
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                    HWProtocolMessage::Quit(None) => {
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                        common::remove_client(server, response, "User quit".to_string());
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                    }
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                    _ => match server.clients[client_id].room_id {
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                        None => lobby::handle(server, client_id, response, message),
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                        Some(room_id) => {
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                            inroom::handle(server, client_id, response, room_id, message)
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                        }
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                    },
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                }
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            }
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        }
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    }
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}
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pub fn handle_client_accept(server: &mut HWServer, client_id: ClientId, response: &mut Response) {
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    let mut salt = [0u8; 18];
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    thread_rng().fill_bytes(&mut salt);
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    server.anteroom.add_client(client_id, encode(&salt));
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    response.add(HWServerMessage::Connected(utils::SERVER_VERSION).send_self());
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}
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pub fn handle_client_loss(server: &mut HWServer, client_id: ClientId, response: &mut Response) {
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    if server.anteroom.remove_client(client_id).is_none() {
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        common::remove_client(server, response, "Connection reset".to_string());
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    }
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}
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pub fn handle_io_result(
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    server: &mut HWServer,
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    client_id: ClientId,
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    response: &mut Response,
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    io_result: IoResult,
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) {
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    match io_result {
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        IoResult::Account(Some(info)) => {
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            response.add(ServerAuth(format!("{:x}", info.server_hash)).send_self());
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            if let Some(client) = server.anteroom.remove_client(client_id) {
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                server.add_client(client_id, client);
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                let client = &mut server.clients[client_id];
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                client.set_is_admin(info.is_admin);
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                client.set_is_contributor(info.is_admin)
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            }
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        }
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        IoResult::Account(None) => {
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            response.add(Error("Authentication failed.".to_string()).send_self());
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            response.remove_client(client_id);
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        }
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        IoResult::SaveRoom(_, true) => {
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            response.add(server_chat("Room configs saved successfully.".to_string()).send_self());
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        }
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        IoResult::SaveRoom(_, false) => {
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            response.add(Warning("Unable to save the room configs.".to_string()).send_self());
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        }
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        IoResult::LoadRoom(room_id, Some(contents)) => {
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            if let Some(ref mut room) = server.rooms.get_mut(room_id) {
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                match room.set_saves(&contents) {
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                    Ok(_) => response.add(
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                        server_chat("Room configs loaded successfully.".to_string()).send_self(),
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                    ),
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                    Err(e) => {
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                        warn!("Error while deserializing the room configs: {}", e);
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                        response.add(
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                            Warning("Unable to deserialize the room configs.".to_string())
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                                .send_self(),
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                        );
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                    }
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                }
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            }
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        }
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        IoResult::LoadRoom(_, None) => {
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            response.add(Warning("Unable to load the room configs.".to_string()).send_self());
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        }
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    }
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}