84 lines
2.8 KiB
Rust
84 lines
2.8 KiB
Rust
//! Module for handling the status updating/retrieval via the cloud service API.
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use std::time::{Duration, SystemTime};
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use rocket::tokio::time::sleep;
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use crate::{
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services::{Error, Service, Services},
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STATUS,
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};
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/// The default sleep interval to use between checks.
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const DEFAULT_SLEEP_INTERVAL: u64 = 10;
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/// The sleep interval upper limit when applying exponential backoff.
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const MAX_SLEEP_INTERVAL: u64 = 320;
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/// The backoff factor.
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const BACKOFF_FACTOR: f64 = 2.0;
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/// Calculates the new interval by applying the backoff factor and taking the maximum into account.
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fn back_off(interval: u64) -> u64 {
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let new_interval = (interval as f64 * BACKOFF_FACTOR) as u64;
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new_interval.min(MAX_SLEEP_INTERVAL)
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}
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/// Main update loop that logs in and periodically acquires updates from the API.
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///
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/// It updates the mutex-guarded current update [`Status`](crate::Status) struct which can be
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/// retrieved via Rocket.
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pub(super) async fn update_loop(service: Services) -> color_eyre::Result<()> {
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let mut service = service;
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// Log in on the cloud service.
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println!("⚡ Logging in...");
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service.login().await?;
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println!("⚡ Logged in successfully!");
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let mut last_updated = 0;
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let poll_interval = service.poll_interval();
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let mut sleep_interval = DEFAULT_SLEEP_INTERVAL;
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loop {
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// Wake up every 10 seconds and check if an update is due.
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sleep(Duration::from_secs(sleep_interval)).await;
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let timestamp = SystemTime::now()
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.duration_since(SystemTime::UNIX_EPOCH)
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.unwrap_or_default()
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.as_secs();
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if timestamp - last_updated < poll_interval {
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continue;
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}
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let status = match service.update(timestamp).await {
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Ok(status) => status,
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Err(Error::NotAuthorized) => {
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eprintln!("💥 Update unauthorized, trying to log in again...");
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if let Err(e) = service.login().await {
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eprintln!("💥 Login failed: {e}; will retry in {sleep_interval} seconds...");
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sleep_interval = back_off(sleep_interval);
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continue;
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};
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println!("⚡ Logged in successfully!");
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sleep_interval = DEFAULT_SLEEP_INTERVAL;
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continue;
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}
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Err(e) => {
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eprintln!(
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"💥 Failed to update status: {e}; will retry in {sleep_interval} seconds..."
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);
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sleep_interval = back_off(sleep_interval);
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continue;
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}
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};
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sleep_interval = DEFAULT_SLEEP_INTERVAL;
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last_updated = timestamp;
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println!("⚡ Updated status to: {:#?}", status);
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let mut status_guard = STATUS.lock().expect("Status mutex was poisoned");
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status_guard.replace(status);
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}
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}
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