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|
extern crate space;
use clap::{App, SubCommand};
use diesel::pg::PgConnection;
use diesel::prelude::*;
use std::collections::HashMap;
use std::io::Write;
use std::net::TcpListener;
use std::thread::{sleep, spawn};
use std::time::{Duration, Instant};
use space::constants;
use space::mass::{Mass, MassEntry};
use space::math::{get_db_url, rand_name};
use space::schema::masses::dsl::masses as db_masses;
use space::schema::masses::dsl::name as name_column;
use space::server_connection::ServerConnection;
fn populate() -> HashMap<String, Mass> {
let mut masses: HashMap<String, Mass> = HashMap::new();
for _ in 0..constants::ASTROID_COUNT {
masses.insert(rand_name(), Mass::new_astroid());
}
masses
}
fn backup(masses: HashMap<String, Mass>) {
let connection = PgConnection::establish(&get_db_url()).expect("Cannot connect");
for (name, mass) in masses {
let mass_entry = mass.to_mass_entry(name.to_string());
diesel::insert_into(db_masses)
.values(&mass_entry)
.on_conflict(name_column)
.do_update()
.set(&mass_entry)
.execute(&connection)
.expect("Cannot backup");
}
}
fn restore() -> HashMap<String, Mass> {
let connection = PgConnection::establish(&get_db_url()).expect("Cannot connect");
db_masses
.load::<MassEntry>(&connection)
.expect("Cannot query, are you sure you can restore?")
.iter()
.map(|mass_entry| mass_entry.to_mass())
.collect()
}
fn main() {
let listener = TcpListener::bind("localhost:6000").unwrap();
listener.set_nonblocking(true).unwrap();
let matches = App::new("space server")
.subcommand(SubCommand::with_name("--restore"))
.get_matches();
let mut masses = match matches.subcommand_name() {
Some("--restore") => restore(),
_ => populate(),
};
let mut backup_countdown = constants::BACKUP_COUNTDOWN;
let mut connections: Vec<ServerConnection> = Vec::new();
for stream in listener.incoming() {
match stream {
Ok(stream) => {
let new_connection = ServerConnection::new(stream, &mut masses);
let exists = connections.iter().position(|connection| {
connection.name == new_connection.name
&& connection.module_type == new_connection.module_type
});
if let Some(index) = exists {
connections.remove(index);
}
connections.push(new_connection);
}
_ => {
let timer = Instant::now();
for connection in &mut connections {
if connection.open {
let mut ship = masses.remove(&connection.name).unwrap();
let send = ship.get_client_data(connection.module_type.clone(), &masses);
connection.open = connection.stream.write(send.as_bytes()).is_ok();
let recv = connection.receive();
ship.give_received_data(connection.module_type.clone(), recv);
masses.insert(connection.name.clone(), ship);
}
}
for key in masses.clone().keys() {
let mut mass = masses.remove(key).unwrap();
mass.process(&mut masses);
masses.insert(key.to_string(), mass);
}
if backup_countdown == 0 {
let masses_clone = masses.clone();
spawn(move || backup(masses_clone));
backup_countdown = constants::BACKUP_COUNTDOWN;
}
if timer.elapsed().as_millis() < constants::LOOP_DURATION_MS.into() {
sleep(Duration::from_millis(
constants::LOOP_DURATION_MS - timer.elapsed().as_millis() as u64,
));
}
backup_countdown -= 1;
}
}
}
}
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