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b/Cargo.toml @@ -0,0 +1,7 @@ +[workspace] + +members = [ + "server", + "client", + "utils" +] \ No newline at end of file diff --git a/README.md b/README.md index 7c2efa5..a59c797 100644 --- a/README.md +++ b/README.md @@ -1,27 +1,26 @@ -# Frobnicator +# Sendino ## Autorzy -- Andrzej Głuszak (gr 9, @agluszak na githubie) -- Linus Torvalds (Uniwersytet Helsiński, @torvalds na githubie) +- Grzegorz Nowakowski +- izmael7 ## Opis -Od zawsze chcieliśmy napisać grę komputerową. -Frobnicator będzie to gra platformowa, w której chodzi o to, żeby... +Projekt aplikacji chatu napisanej w języku Rust, oparty o model komunikacji +`client-server`. Udostępnia jeden pokój do komunikacji dla wielu użytkowników. -Z grubsza będziemy wzorować się na [tym tutorialu](https://dev.to/sbelzile/rust-platformer-part-1-bevy-and-ecs-2pci). +## Funkcjonalności +Serwer obsługuje wielu klientów jednocześnie. Po otrzymaniu wiadomości +od klienta odpowiednio ją formatuje i rozsyła grupowo do pozostałych +użytkowników. Wiadomości są przekazywane w formacie JSON. -## Funkcjonalność -- Generowanie map -- Strzelanie -- AI dla wrogów (bardziej rozbudowane niż w tutorialu) -- Możliwość zapisywania i wczytywania stanu gry -- Punktacja - -## Propozycja podziału na części -W pierwszej części stworzymy grę opartą na tutorialu (z lepszym AI) i jedną zahardcodowaną planszą. +## Biblioteki +- tokio +- serde_json +- crossterm -W drugiej części dodamy do tego losowy generator map, zapisywanie/wczytywanie stanu gry oraz system punktacji. +## Sposób użycia +Uruchamianie serwera: +`cargo run --bin jnp-chat-server :` -## Biblioteki -- Bevy -- może coś do serializacji danych? 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"0.4" +num-derive = "0.3" +num-traits = "0.2" diff --git a/client/src/main.rs b/client/src/main.rs new file mode 100644 index 0000000..ba7288c --- /dev/null +++ b/client/src/main.rs @@ -0,0 +1,279 @@ +use crossterm::{ + event::{self, poll, EnableMouseCapture, Event, KeyCode}, + execute, + style::Stylize, + terminal::enable_raw_mode, +}; + +use std::{ + env, + io::{self, Write}, + net::*, + sync::mpsc::{self, TryRecvError}, + time::Duration, +}; + +use chrono::prelude::*; +use networking::*; +use serde_json::*; +use utils::{Message, MessageStyle}; + +pub mod networking; + +const MESSAGE_MAX_LENGTH: usize = 256; +const MIN_FRAMETIME: i64 = ((1.0 / 24.0) * 1000.0) as i64; + +enum InputMode { + Chatting, + System, +} + +struct Chat { + log: Vec, + input: String, + input_mode: InputMode, +} + +impl Default for Chat { + fn default() -> Chat { + Chat { + log: Vec::new(), + input: String::new(), + input_mode: InputMode::Chatting, + } + } +} + +fn parse_message(m: &Message) -> String { + let mut sender = m.sender.clone(); + let mut text = m.text.clone(); + + match m.style { + MessageStyle::User => { + sender = sender.green().to_string(); + text = text.white().to_string(); + } + MessageStyle::Yourself => { + sender = sender.yellow().to_string(); + text = text.white().to_string(); + } + MessageStyle::Admin => { + sender = sender.magenta().to_string(); + text = text.white().to_string(); + } + MessageStyle::Server => { + sender = sender.on_blue().to_string(); + text = text.blue().to_string(); + } + MessageStyle::Client => { + sender = sender.on_white().to_string(); + text = text.white().bold().to_string(); + } + }; + + return format!( + "[{}] {}: {}", + Utc.timestamp(m.timestamp, 0) + .format("%H:%M") + .to_string() + .grey() + .italic(), + sender, + text + ); +} + +fn main() { + let args: Vec = env::args().collect(); + + if args.len() != 3 { + eprintln!("Usage: : "); + return; + } + + let address = &args[1]; + let username = &mut args[2].clone(); + + if !(3..16).contains(&username.chars().count()) { + eprintln!("Username must be no longer than 16 and no shorter than 3"); + return; + } + + enable_raw_mode().expect("Crossterm: Failed to enable raw mode"); + let mut stdout = io::stdout(); + + execute!(stdout, EnableMouseCapture).expect("Crossterm: Failed to execute command preset"); + + let app = Chat::default(); + match run_app(app, address.to_string(), username.to_string()) { + Ok(r) => { + println!("{}", r); + } + Err(e) => { + eprintln!("Error occured: {}", e) + } + } +} + +fn run_app(mut chat: Chat, address: String, username: String) -> io::Result { + let mut stream = match TcpStream::connect(address) { + Ok(s) => s, + Err(e) => { + return Err(e); + } + }; + + send_json(json!({ "username": username }), &mut stream); + + match receive_json(&mut stream) { + Some(v) => match v["result"].as_str().unwrap() { + "ok" => { + println!("{}", "Successfully joined chat".on_green()); + } + "no" => { + return Ok(v["reason"].as_str().unwrap().to_string()); + } + _ => { + return Ok("Unexpected server response".to_string()); + } + }, + None => { + return Ok("Server failed to respond".to_string()); + } + } + + stream + .set_nonblocking(true) + .expect("Unable to set stream as non-blocking"); + + let (tx, rx) = mpsc::channel::(); + let mut last_ui_update: i64 = 0; + let mut do_ui_update: bool = true; + + loop { + let now = Utc::now().timestamp_millis(); + let delta_t = now - last_ui_update; + + if do_ui_update && delta_t > MIN_FRAMETIME { + draw(&mut chat); + last_ui_update = now; + do_ui_update = false; + } + + if let Some(data) = receive_json(&mut stream) { + let msg = Message { + timestamp: data["timestamp"].as_i64().unwrap(), + sender: data["sender"].as_str().unwrap().to_string(), + text: data["text"].as_str().unwrap().to_string(), + style: num::FromPrimitive::from_i64(data["style"].as_i64().unwrap()).unwrap(), + }; + + chat.log.push(msg); + do_ui_update = true; + } + + match rx.try_recv() { + Ok(mut data) => { + data.push('\n'); + stream + .write_all(data.as_bytes()) + .expect("Unable to send data to server"); + } + Err(TryRecvError::Empty) => (), + Err(TryRecvError::Disconnected) => { + return Ok("Connection with server unexpectedly closed" + .to_string() + .red() + .to_string()) + } + } + + if poll(Duration::from_millis(0)).unwrap() { + if let Event::Key(key) = event::read()? { + match key.code { + KeyCode::Enter => match chat.input_mode { + InputMode::Chatting => { + tx.send(chat.input.drain(..).collect()) + .expect("Error during send"); + } + InputMode::System => { + match chat.input.to_lowercase().as_str() { + "exit" | "e" | "quit" | "q" => { + return Ok("Bye".to_string()); + } + "help" | "?" => chat.log.push(Message { + timestamp: Utc::now().timestamp(), + sender: "System".to_string(), + text: "(E)xit, (Q)uit - closes app".to_string(), + style: MessageStyle::Client, + }), + _ => chat.log.push(Message { + timestamp: Utc::now().timestamp(), + sender: "System".to_string(), + text: "Unknown command".to_string(), + style: MessageStyle::Client, + }), + } + chat.input.clear(); + } + }, + KeyCode::Char(c) => { + if chat.input.chars().count() < MESSAGE_MAX_LENGTH { + chat.input.push(c); + } + } + KeyCode::Backspace => { + chat.input.pop(); + } + KeyCode::Esc => { + chat.input.clear(); + chat.input_mode = match chat.input_mode { + InputMode::Chatting => InputMode::System, + InputMode::System => InputMode::Chatting, + }; + } + _ => {} + } + do_ui_update = true; + } + } + } +} + +fn draw(chat: &mut Chat) { + let input_label = match chat.input_mode { + InputMode::Chatting => "CHAT>".to_string().on_white(), + InputMode::System => "COMMAND>".to_string().on_magenta(), + }; + + let messages = chat.log.drain(..).rev(); + let terminal_width = crossterm::terminal::size().unwrap().0.into(); + // line_capacity is how much characters we can display in input line, + // -1 because there is 1-chat wide space between Label and actual input text + let line_capacity = terminal_width - input_label.content().chars().count() - 1; + + print!("\r{}\r", " ".repeat(terminal_width)); + + if messages.len() > 0 { + for m in messages { + print!("{}\n\r", parse_message(&m)); + } + } + + let mut input_line = chat.input.clone(); + let input_length = input_line.chars().count(); + + if input_length > line_capacity { + input_line = input_line + .split_at(input_length - line_capacity) + .1 + .to_string(); + } + + if input_length >= MESSAGE_MAX_LENGTH { + input_line = input_line.red().to_string(); + } + + print!("{} {}", input_label, input_line); + io::stdout().flush().expect("Failed to flush"); +} diff --git a/client/src/networking.rs b/client/src/networking.rs new file mode 100644 index 0000000..4d8903e --- /dev/null +++ b/client/src/networking.rs @@ -0,0 +1,45 @@ +use serde_json::Value; +use std::{ + io::{Read, Write}, + net::TcpStream, + str::from_utf8, +}; + +pub fn send_json(data: Value, s: &mut TcpStream) { + let data_json = data.to_string(); + + if data_json.len() > 65535 { + eprintln!("Data must not exceed 65535 bytes"); + return; + } + + let header: [u8; 2] = (data_json.len() as u16).to_be_bytes(); + s.write_all(&[&header, data_json.as_bytes()].concat()) + .unwrap(); +} + +pub fn receive_json(r: &mut TcpStream) -> Option { + let mut header: [u8; 2] = [0, 0]; + + if r.read_exact(&mut header).is_err() { + return None; + } + + let data_size = u16::from_be_bytes(header); + let mut data_bytes = vec![0_u8; data_size.into()]; + + if r.read_exact(&mut data_bytes).is_err() { + return None; + } + + match from_utf8(&data_bytes) { + Ok(s) => { + let res: Result = serde_json::from_str(s); + match res { + Ok(v) => Some(v), + Err(_) => None, + } + } + Err(_) => None, + } +} diff --git a/server/Cargo.lock b/server/Cargo.lock new file mode 100644 index 0000000..ec5ffcb --- /dev/null +++ b/server/Cargo.lock @@ -0,0 +1,862 @@ +# This file is automatically @generated by Cargo. +# It is not intended for manual editing. +version = 3 + 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chrono::*; +use colored::Colorize; +use futures::lock::Mutex; +use networking::*; +use serde_json::*; +use std::collections::HashMap; +use std::env; +use std::net::SocketAddr; +use std::sync::Arc; +use tokio::io::{AsyncBufReadExt, BufReader}; +use tokio::net::TcpListener; +use tokio::sync::broadcast::{self}; +use utils::{Message, MessageStyle}; + +pub mod networking; + +type Db = Arc>>; + +#[tokio::main] +async fn main() { + let args: Vec = env::args().collect(); + + if args.len() != 2 { + eprintln!("Usage: "); + return; + } + + println!( + "{} {}", + "Starting server on".bold(), + &args[1].to_string().italic() + ); + + let listener = match TcpListener::bind(&args[1]).await { + Ok(n) => { + println!("{}", "Server up and running... ".green()); + n + } + Err(e) => { + eprintln!( + "{}\n{}", + "Failed to start server, reason:".red(), + e.to_string().italic() + ); + return; + } + }; + + let db: Db = Arc::new(Mutex::new(HashMap::new())); + + let (tx, _) = broadcast::channel(64); + + loop { + let (mut socket, addr) = listener.accept().await.unwrap(); + + let db = db.clone(); + let tx = tx.clone(); + let mut rx = tx.subscribe(); + + tokio::spawn(async move { + let (reader, mut writer) = socket.split(); + + let mut reader = BufReader::new(reader); + let mut line = String::new(); + + let username = match receive_json(&mut reader).await { + Some(v) => v["username"] + .as_str() + .expect("Failed to parse username") + .to_string(), + None => return, + }; + + let mut db = db.lock().await; + + if db.contains_key(&username) { + if db + .get(&username) + .expect("Failed to access user database") + .ip() + == addr.ip() + { + send_json( + json!({ + "result": "ok", + "reason": "Welcome back" + }), + &mut writer, + ) + .await; + println!("{} {}", username.as_str(), "re-joined server".blue()); + } else { + send_json( + json!({ + "result": "no", + "reason": "Username already taken" + }), + &mut writer, + ) + .await; + println!( + "{} {}", + "Someone tried to join server as ".bright_red(), + username.as_str() + ); + } + } else { + send_json( + json!({ + "result": "ok", + "reason": "Welcome new user" + }), + &mut writer, + ) + .await; + + db.insert(username.to_string(), addr); + + let message = utils::Message { + timestamp: Utc::now().timestamp(), + sender: "Server".to_string(), + style: MessageStyle::Server, + text: [username.as_str(), "joined chat"].join(" "), + }; + + tx.send((message, addr)).unwrap(); + println!("{} {}", username.as_str(), "joined server".blue()); + } + + // We need to drop mutex guard manually because scope is still alive. + drop(db); + + line.clear(); + + loop { + tokio::select! { + result = reader.read_line(&mut line) => { + if result.unwrap() == 0 { + break; + } + let message = Message { + timestamp: Utc::now().timestamp(), + sender: username.clone(), + style: MessageStyle::User, + text: line.clone().trim().to_string() + }; + + tx.send((message, addr)) + .unwrap(); + + line.clear(); + } + result = rx.recv() => { + let (mut msg, _addr) = result.unwrap(); + + if msg.sender == username { + msg.style = MessageStyle::Yourself + } + + send_message(msg, &mut writer) + .await; + } + } + } + }); + } +} diff --git a/server/src/networking.rs b/server/src/networking.rs new file mode 100644 index 0000000..1582267 --- /dev/null +++ b/server/src/networking.rs @@ -0,0 +1,57 @@ +use serde_json::{json, Value}; +use std::str::from_utf8; +use tokio::io::{AsyncReadExt, AsyncWriteExt, BufReader}; +use tokio::net::tcp::{ReadHalf, WriteHalf}; + +use crate::Message; + +pub async fn send_message(data: Message, s: &mut WriteHalf<'_>) { + let data_json = json!({ + "timestamp": data.timestamp, + "sender": data.sender, + "style": data.style as u8, + "text": data.text + }); + + send_json(data_json, s).await; +} + +pub async fn send_json(data: Value, s: &mut WriteHalf<'_>) { + let data_json = data.to_string(); + + if data_json.len() > 65535 { + eprintln!("Data must not exceed 65535 bytes"); + return; + } + + let header: [u8; 2] = (data_json.len() as u16).to_be_bytes(); + s.write_all(&[&header, data_json.as_bytes()].concat()) + .await + .unwrap(); +} + +pub async fn receive_json(r: &mut BufReader>) -> Option { + let mut header: [u8; 2] = [0, 0]; + + if (r.read_exact(&mut header).await).is_err() { + return None; + } + + let data_size = u16::from_be_bytes(header); + let mut data_bytes = vec![0_u8; data_size.into()]; + + if (r.read_exact(&mut data_bytes).await).is_err() { + return None; + } + + match from_utf8(&data_bytes) { + Ok(s) => { + let res: Result = serde_json::from_str(s); + match res { + Ok(v) => Some(v), + Err(_) => None, + } + } + Err(_) => None, + } +} diff --git a/utils/Cargo.toml b/utils/Cargo.toml new file mode 100644 index 0000000..5ca45a0 --- /dev/null +++ b/utils/Cargo.toml @@ -0,0 +1,13 @@ +[package] +name = "utils" +version = "0.1.0" +edition = "2021" + +# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html + +[lib] +path = "src/utils.rs" + +[dependencies] +num-derive = "0.3" +num-traits = "0.2" \ No newline at end of file diff --git a/utils/src/utils.rs b/utils/src/utils.rs new file mode 100644 index 0000000..f11f9dd --- /dev/null +++ b/utils/src/utils.rs @@ -0,0 +1,18 @@ +use num_derive::FromPrimitive; + +#[derive(Debug, Clone, FromPrimitive)] +pub enum MessageStyle { + User = 0, + Yourself = 1, + Admin = 2, + Server = 3, + Client = 4, +} + +#[derive(Debug, Clone)] +pub struct Message { + pub timestamp: i64, + pub sender: String, + pub style: MessageStyle, + pub text: String, +}