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#![allow(unused_variables)]
#[derive(Debug)]
struct CubeSat {
id: u64,
}
#[derive(Debug)]
struct Mailbox {
messages: Vec<Message>,
}
#[derive(Debug)]
struct Message {
to: u64,
content: String,
}
struct GroundStation {}
impl Mailbox {
fn post(&mut self, msg: Message) {
self.messages.push(msg);
}
fn deliver(&mut self, recipient: &CubeSat) -> Option<Message> {
for i in 0..self.messages.len() {
if self.messages[i].to == recipient.id {
let msg = self.messages.remove(i);
return Some(msg);
}
}
None
}
}
impl GroundStation {
fn connect(&self, sat_id: u64) -> CubeSat {
CubeSat {
id: sat_id,
}
}
fn send(&self, mailbox: &mut Mailbox, msg: Message) {
mailbox.post(msg);
}
}
impl CubeSat {
fn recv(&self, mailbox: &mut Mailbox) -> Option<Message> {
mailbox.deliver(&self)
}
}
fn fetch_sat_ids() -> Vec<u64> {
vec![1,2,3]
}
fn main() {
let mut mail = Mailbox { messages: vec![] };
let base = GroundStation {};
let sat_ids = fetch_sat_ids();
for sat_id in sat_ids {
let sat = base.connect(sat_id);
let msg = Message { to: sat_id, content: String::from("hello") };
base.send(&mut mail, msg);
}
let sat_ids = fetch_sat_ids();
for sat_id in sat_ids {
let sat = base.connect(sat_id);
let msg = sat.recv(&mut mail);
println!("{:?}: {:?}", sat, msg);
}
}
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