1 use slab;

     2 use crate::utils;

     3 use super::{

     4     io::HWServerIO,

     5     client::HWClient, room::HWRoom, actions, handlers,

     6     coretypes::{ClientId, RoomId},

     7     actions::{Destination, PendingMessage}

     8 };

     9 use crate::protocol::messages::*;

    10 use rand::{RngCore, thread_rng};

    11 use base64::{encode};

    12 use log::*;

    13 

    14 type Slab<T> = slab::Slab<T>;

    15 

    16 pub struct HWServer {

    17     pub clients: Slab<HWClient>,

    18     pub rooms: Slab<HWRoom>,

    19     pub lobby_id: RoomId,

    20     pub output: Vec<(Vec<ClientId>, HWServerMessage)>,

    21     pub removed_clients: Vec<ClientId>,

    22     pub io: Box<dyn HWServerIO>

    23 }

    24 

    25 impl HWServer {

    26     pub fn new(clients_limit: usize, rooms_limit: usize, io: Box<dyn HWServerIO>) -> HWServer {

    27         let rooms = Slab::with_capacity(rooms_limit);

    28         let clients = Slab::with_capacity(clients_limit);

    29         let mut server = HWServer {

    30             clients, rooms,

    31             lobby_id: 0,

    32             output: vec![],

    33             removed_clients: vec![],

    34             io

    35         };

    36         server.lobby_id = server.add_room();

    37         server

    38     }

    39 

    40     pub fn add_client(&mut self) -> ClientId {

    41         let key: ClientId;

    42         {

    43             let entry = self.clients.vacant_entry();

    44             key = entry.key();

    45             let mut salt = [0u8; 18];

    46             thread_rng().fill_bytes(&mut salt);

    47 

    48             let client = HWClient::new(entry.key(), encode(&salt));

    49             entry.insert(client);

    50         }

    51         self.send(key, &Destination::ToSelf, HWServerMessage::Connected(utils::PROTOCOL_VERSION));

    52         key

    53     }

    54 

    55     pub fn client_lost(&mut self, client_id: ClientId) {

    56         actions::run_action(self, client_id,

    57                             actions::Action::ByeClient("Connection reset".to_string()));

    58     }

    59 

    60     pub fn add_room(&mut self) -> RoomId {

    61         let entry = self.rooms.vacant_entry();

    62         let key = entry.key();

    63         let room = HWRoom::new(entry.key());

    64         entry.insert(room);

    65         key

    66     }

    67 

    68     pub fn handle_msg(&mut self, client_id: ClientId, msg: HWProtocolMessage) {

    69         debug!("Handling message {:?} for client {}", msg, client_id);

    70         if self.clients.contains(client_id) {

    71             handlers::handle(self, client_id, msg);

    72         }

    73     }

    74 

    75     fn get_recipients(&self, client_id: ClientId, destination: &Destination) -> Vec<ClientId> {

    76         let mut ids = match *destination {

    77             Destination::ToSelf => vec![client_id],

    78             Destination::ToId(id) => vec![id],

    79             Destination::ToAll {room_id: Some(id), ..} =>

    80                 self.room_clients(id),

    81             Destination::ToAll {protocol: Some(proto), ..} =>

    82                 self.protocol_clients(proto),

    83             Destination::ToAll {..} =>

    84                 self.clients.iter().map(|(id, _)| id).collect::<Vec<_>>()

    85         };

    86         if let Destination::ToAll {skip_self: true, ..} = destination {

    87             if let Some(index) = ids.iter().position(|id| *id == client_id) {

    88                 ids.remove(index);

    89             }

    90         }

    91         ids

    92     }

    93 

    94     pub fn send(&mut self, client_id: ClientId, destination: &Destination, message: HWServerMessage) {

    95         let ids = self.get_recipients(client_id, &destination);

    96         self.output.push((ids, message));

    97     }

    98 

    99     pub fn react(&mut self, client_id: ClientId, actions: Vec<actions::Action>) {

   100         for action in actions {

   101             actions::run_action(self, client_id, action);

   102         }

   103     }

   104 

   105     pub fn lobby(&self) -> &HWRoom { &self.rooms[self.lobby_id] }

   106 

   107     pub fn has_room(&self, name: &str) -> bool {

   108         self.rooms.iter().any(|(_, r)| r.name == name)

   109     }

   110 

   111     pub fn find_room(&self, name: &str) -> Option<&HWRoom> {

   112         self.rooms.iter().find_map(|(_, r)| Some(r).filter(|r| r.name == name))

   113     }

   114 

   115     pub fn find_room_mut(&mut self, name: &str) -> Option<&mut HWRoom> {

   116         self.rooms.iter_mut().find_map(|(_, r)| Some(r).filter(|r| r.name == name))

   117     }

   118 

   119     pub fn find_client(&self, nick: &str) -> Option<&HWClient> {

   120         self.clients.iter().find_map(|(_, c)| Some(c).filter(|c| c.nick == nick))

   121     }

   122 

   123     pub fn find_client_mut(&mut self, nick: &str) -> Option<&mut HWClient> {

   124         self.clients.iter_mut().find_map(|(_, c)| Some(c).filter(|c| c.nick == nick))

   125     }

   126 

   127     pub fn select_clients<F>(&self, f: F) -> Vec<ClientId>

   128         where F: Fn(&(usize, &HWClient)) -> bool {

   129         self.clients.iter().filter(f)

   130             .map(|(_, c)| c.id).collect()

   131     }

   132 

   133     pub fn room_clients(&self, room_id: RoomId) -> Vec<ClientId> {

   134         self.select_clients(|(_, c)| c.room_id == Some(room_id))

   135     }

   136 

   137     pub fn protocol_clients(&self, protocol: u16) -> Vec<ClientId> {

   138         self.select_clients(|(_, c)| c.protocol_number == protocol)

   139     }

   140 

   141     pub fn other_clients_in_room(&self, self_id: ClientId) -> Vec<ClientId> {

   142         let room_id = self.clients[self_id].room_id;

   143         self.select_clients(|(id, c)| *id != self_id && c.room_id == room_id )

   144     }

   145 

   146     pub fn client_and_room(&mut self, client_id: ClientId) -> (&mut HWClient, Option<&mut HWRoom>) {

   147         let c = &mut self.clients[client_id];

   148         if let Some(room_id) = c.room_id {

   149             (c, Some(&mut self.rooms[room_id]))

   150         } else {

   151             (c, None)

   152         }

   153     }

   154 

   155     pub fn room(&mut self, client_id: ClientId) -> Option<&mut HWRoom> {

   156         self.client_and_room(client_id).1

   157     }

   158 }