chat-reseau-p8/Rust/src/client.rs

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Rust
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extern crate chrono;
extern crate colored;
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extern crate term_size;
use std;
use std::io::*;
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use std::net::TcpStream;
use std::thread;
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use std::collections::hash_map::DefaultHasher;
use std::hash::{Hash, Hasher};
use self::colored::*;
use self::chrono::Local;
// TODO: Limit usernames to ascii
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// TODO: Implement requests 1.x from protocol
// TODO: forbid usernames already in use
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fn hash_name(name: &str) -> usize {
let mut s = DefaultHasher::new();
let name = String::from(name);
name.hash(&mut s);
s.finish() as usize
}
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fn get_entry() -> String {
let mut buf = String::new();
stdin().read_line(&mut buf).unwrap();
buf.replace("\n", "").replace("\r", "")
}
fn get_name(writer: &mut BufWriter<&TcpStream>) {
loop {
let mut line = &*get_entry();
line = line.trim();
if line.len() > 20 {
println!("Nickname too long, it must be at most 20 characters long");
continue;
}
match line {
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"" => {
continue;
}
"/quit" => {
println!("Disconnecting...");
writeln!(writer, "BYE").unwrap();
writer.flush().unwrap();
return ();
}
line => {
let line_str: String = String::from(line);
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let spliced: Vec<&str> = line_str.split_whitespace().collect();
if spliced.len() > 1 {
println!("Cannot use whitespace in username.");
continue;
}
writeln!(writer, "{}", line).unwrap();
writer.flush().unwrap();
}
}
return;
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}
}
fn write_to_server(stream: TcpStream) {
let mut writer = BufWriter::new(&stream);
// entrée du nom d'utilisateur
get_name(&mut writer);
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loop {
let line = &*get_entry();
line.trim();
match line {
"" => {}
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"/quit" => {
writeln!(writer, "BYE").unwrap();
writer.flush().unwrap();
return ();
}
"/clients" => {
writeln!(writer, "REQ CLIENTS").unwrap();
writer.flush().unwrap();
}
line => {
if line.len() > 2000 {
println!(
"{}",
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"Cannot send a message longer than 2000 characters".bright_red()
);
continue;
}
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writeln!(writer, "MSG {}", line).unwrap();
writer.flush().unwrap();
}
}
}
}
fn exchange_with_server(stream: TcpStream) {
let server = stream.peer_addr().unwrap();
println!("Connected to {}", server);
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#[allow(non_snake_case)]
let COLORS: Vec<&str> = vec![
// "black",
"red",
"green",
"yellow",
"blue",
"magenta",
"cyan",
// "white",
];
let stream_cpy = stream.try_clone().unwrap();
let mut reader = BufReader::new(&stream_cpy);
macro_rules! receive {
() => ({
let mut line = String::new();
match reader.read_line(&mut line) {
Ok(len) => {
if len == 0 {
// Reader is at EOF. Could use ErrorKind::UnexpectedEOF,
// but still unstable.
let ret = std::io::Error::new(
std::io::ErrorKind::Other, "test");
return
Err(ret): std::result::Result<&str,std::io::Error>;
}
line.pop();
}
Err(e) => { return Err(e); }
};
line
})
}
thread::spawn(move || {
write_to_server(stream.try_clone().unwrap());
});
match (|| loop {
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let input: String = String::from(receive!());
let spliced_input: Vec<&str> = input.split(" ").collect();
match spliced_input[0] {
"WELCOME" => {
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println!("{}", ">>> Login Successful <<<".green());
println!("Type /clients to get the list of users connected");
println!("Type /quit to disconnect and quit");
}
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"FROM" => {
let date = Local::now();
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let name = String::from(spliced_input[1]);
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let mut first_line = true;
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// Hashing name for color
let mut s = DefaultHasher::new();
name.hash(&mut s);
let name_hash: usize = (s.finish() as usize) % COLORS.len();
// Formatting name
let mut name = String::new();
for _i in 0..(20 - spliced_input[1].to_string().len()) {
name.push(' ');
}
name.push('<');
name.push_str(spliced_input[1]);
name.push('>');
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if let Some((w, _)) = term_size::dimensions() {
let mut msg = String::new();
let w = w - 34;
for mut i in 3..spliced_input.len() {
if w > msg.len() + spliced_input[i].len() + 1 {
msg.push(' ');
msg.push_str(spliced_input[i]);
} else {
if first_line == true {
println!(
"{} {}:{}",
date.format("[%H:%M:%S]").to_string().dimmed(),
name.color(COLORS[name_hash]),
msg.yellow().dimmed()
);
first_line = false;
} else {
println!(
"{}{}",
" |".green(),
msg.yellow().dimmed()
);
}
msg = String::new();
#[allow(unused_assignments)]
i = i - 1;
}
}
if first_line == true {
println!(
"{} {}:{}",
date.format("[%H:%M:%S]").to_string().dimmed(),
name.color(COLORS[name_hash]),
msg.yellow().dimmed()
);
} else {
println!(
"{}{}",
" |".green(),
msg.yellow().dimmed()
);
}
} else {
let mut msg = String::new();
for i in 3..spliced_input.len() {
msg.push_str(" ");
msg.push_str(spliced_input[i]);
}
println!(
"{} {}{}",
date.format("[%H:%M:%S]").to_string().dimmed(),
name.color(COLORS[name_hash]),
msg.yellow().dimmed()
);
}
}
"BYE" => {
return Ok("Ok");
}
"LIST" => {
println!("{}", ">>>> LIST OF CLIENTS CONNECTED <<<<".bold().yellow());
for i in 2..spliced_input.len() {
println!("\t\t{}", spliced_input[i]);
}
}
"JOIN" => {
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let date = Local::now();
let name_hash: usize = hash_name(spliced_input[1].clone()) % COLORS.len();
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println!(
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"{}{}{}{}",
date.format("[%H:%M:%S]").to_string().dimmed(),
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" ------> ".green(),
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spliced_input[1].color(COLORS[name_hash]),
" has joined".green()
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)
}
"LOGOUT" => {
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let date = Local::now();
let name_hash: usize = hash_name(spliced_input[1].clone()) % COLORS.len();
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println!(
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"{}{}{}{}",
date.format("[%H:%M:%S]").to_string().dimmed(),
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" <------ ".red(),
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spliced_input[1].color(COLORS[name_hash]),
" has left".red()
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)
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}
_ => {
println!("{}", input);
}
}
// println!("{}", input);
})()
{
Ok(_) => {
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println!("{}", ">>> Logout successful <<<".green());
}
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Err(_) => {
println!("{}", "Error: Connection with server lost".red());
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}
}
}
pub fn client(server_address: String) {
println!("Trying to connect to the server...");
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match TcpStream::connect(server_address) {
Ok(stream) => {
exchange_with_server(stream);
}
Err(e) => {
println!("{} {}", "Connection to server failed:".red(), e);
return;
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}
}
}