132 lines
4.4 KiB
Rust
132 lines
4.4 KiB
Rust
//! Module for handling the status updating/retrieval via the My Autarco site/API.
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use std::time::{Duration, SystemTime};
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use reqwest::{Client, ClientBuilder, Error, StatusCode};
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use rocket::tokio::time::sleep;
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use serde::Deserialize;
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use url::{ParseError, Url};
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use super::{Config, Status, BASE_URL, POLL_INTERVAL, STATUS};
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/// Returns the login URL for the My Autarco site.
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fn login_url() -> Result<Url, ParseError> {
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Url::parse(&format!("{}/auth/login", BASE_URL))
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}
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/// Returns an API endpoint URL for the given site ID and endpoint of the My Autarco site.
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fn api_url(site_id: &str, endpoint: &str) -> Result<Url, ParseError> {
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Url::parse(&format!(
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"{}/api/site/{}/kpis/{}",
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BASE_URL, site_id, endpoint
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))
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}
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/// The energy data returned by the energy API endpoint.
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#[derive(Debug, Deserialize)]
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struct ApiEnergy {
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/// Total energy produced today (kWh)
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// pv_today: u32,
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/// Total energy produced this month (kWh)
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// pv_month: u32,
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/// Total energy produced since installation (kWh)
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pv_to_date: u32,
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}
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/// The power data returned by the power API endpoint.
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#[derive(Debug, Deserialize)]
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struct ApiPower {
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/// Current power production (W)
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pv_now: u32,
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}
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/// Performs a login on the My Autarco site.
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///
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/// It mainly stores the acquired cookie in the client's cookie jar. The login credentials come
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/// from the loaded configuration (see [`Config`]).
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async fn login(config: &Config, client: &Client) -> Result<(), Error> {
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let params = [
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("username", &config.username),
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("password", &config.password),
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];
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let login_url = login_url().expect("valid login URL");
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client.post(login_url).form(¶ms).send().await?;
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Ok(())
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}
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/// Retrieves a status update from the API of the My Autarco site.
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///
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/// It needs the cookie from the login to be able to perform the action. It uses both the `energy`
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/// and `power` endpoint to construct the [`Status`] struct.
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async fn update(config: &Config, client: &Client, last_updated: u64) -> Result<Status, Error> {
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// Retrieve the data from the API endpoints.
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let api_energy_url = api_url(&config.site_id, "energy").expect("valid API energy URL");
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let api_response = client.get(api_energy_url).send().await?;
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let api_energy: ApiEnergy = match api_response.error_for_status() {
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Ok(res) => res.json().await?,
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Err(err) => return Err(err),
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};
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let api_power_url = api_url(&config.site_id, "power").expect("valid API power URL");
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let api_response = client.get(api_power_url).send().await?;
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let api_power: ApiPower = match api_response.error_for_status() {
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Ok(res) => res.json().await?,
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Err(err) => return Err(err),
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};
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// Update the status.
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Ok(Status {
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current_w: api_power.pv_now,
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total_kwh: api_energy.pv_to_date,
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last_updated,
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})
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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`] struct which can be retrieved via
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/// Rocket.
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pub(super) async fn update_loop(config: Config) -> color_eyre::Result<()> {
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let client = ClientBuilder::new().cookie_store(true).build()?;
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// Go to the My Autarco site and login.
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println!("⚡ Logging in...");
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login(&config, &client).await?;
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println!("⚡ Logged in successfully!");
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let mut last_updated = 0;
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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(10)).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 update(&config, &client, timestamp).await {
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Ok(status) => status,
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Err(e) if e.status() == Some(StatusCode::UNAUTHORIZED) => {
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println!("✨ Update unauthorized, trying to log in again...");
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login(&config, &client).await?;
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println!("⚡ Logged in successfully!");
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continue;
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}
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Err(e) => {
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println!("✨ Failed to update status: {}", e);
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continue;
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}
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};
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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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