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use std::io::prelude::*;
use std::io::BufReader;
use std::net::TcpStream;
extern crate serde_json;
use ship::Ship;
use mass::Mass;
use module::{Module, from_primitive};
pub struct Connection {
index : usize,
module : Module,
stream : TcpStream,
buff_r : BufReader<TcpStream>,
pub open : bool,
}
impl Connection {
pub fn new(mut stream : TcpStream, masses : &mut Vec<Box<Mass>>) -> Connection {
let mut buff_r = BufReader::new(stream.try_clone().unwrap());
let mut data = String::new();
buff_r.read_line(&mut data).unwrap();
let name = &data[..data.find(":").unwrap()];
let result = masses.into_iter().position(|ship| ship.name() == name);
let index = match result {
Some(index) => index,
None => {
let ship = Box::new(Ship::new(name, (0,0,0)));
masses.push(ship);
masses.len() - 1
},
};
let modules = b"dashboard,navigation,engine\n";
stream.write(modules).unwrap();
let mut data = String::new();
buff_r.read_line(&mut data).unwrap();
let module = from_primitive(data);
stream.set_nonblocking(true).unwrap();
Connection {
index : index,
module : module,
stream : stream,
buff_r : buff_r,
open : true,
}
}
pub fn process(&mut self, masses : &mut Vec<Box<Mass>>) {
match self.module {
Module::Dashboard => {
let mut send = masses[self.index].serialize();
send.push_str("\n");
match self.stream.write(send.as_bytes()) {
Ok(_result) => (),
Err(_error) => self.open = false,
}
}
Module::Engines => {
let mut location = masses[self.index].location();
let mut data = String::new();
match self.buff_r.read_line(&mut data) {
Ok(result) => match data.as_bytes() {
b"5\n" => location.0 += 1,
b"0\n" => location.0 -= 1,
b"8\n" => location.1 += 1,
b"2\n" => location.1 -= 1,
b"4\n" => location.2 += 1,
b"6\n" => location.2 -= 1,
_ => {
if result == 0 {
self.open = false;
}
},
},
Err(_error) => (),
}
masses[self.index].set_location(location);
}
Module::Navigation => {
let ship = &masses[self.index].downcast_ref::<Ship>().unwrap();
let within_range : Vec<_> = masses.iter().filter(|mass|
distance(ship.location(), mass.location()) < ship.range()).collect();
let mut send = String::new();
for mass in within_range {
send.push_str(&mass.serialize());
send.push_str(",");
}
send.push_str("\n");
match self.stream.write(send.as_bytes()) {
Ok(_result) => (),
Err(_error) => self.open = false,
}
}
}
}
}
fn distance(l0 : (isize, isize, isize), l1 : (isize, isize, isize)) -> f64 {
(((l1.0-l0.0).pow(2) + (l1.1-l0.1).pow(2) + (l1.2-l0.2).pow(2)) as f64).sqrt()
}
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