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use std::str::FromStr;
use std::net::IpAddr;
use std::sync::Arc;
use axum::extract::ws::WebSocket;
use axum::extract::ws::Message;
use dashmap::DashMap;
use sqlx::PgPool;
use time::{Duration, Instant};
use tokio::sync::broadcast::Sender;
use tracing::{debug, error, trace};
use crate::AppState;
use crate::config::Config;
use crate::db::Device;
pub type StatusMap = DashMap<String, Value>;
#[derive(Debug, Clone)]
pub struct Value {
pub ip: String,
pub online: bool
}
pub async fn spawn(tx: Sender<BroadcastCommands>, config: &Config, device: Device, uuid: String, ping_map: &StatusMap, db: &PgPool) {
let timer = Instant::now();
let payload = [0; 8];
let ping_ip = IpAddr::from_str(&device.ip).expect("bad ip");
let mut msg: Option<BroadcastCommands> = None;
while msg.is_none() {
let ping = surge_ping::ping(
ping_ip,
&payload
).await;
if let Err(ping) = ping {
let ping_timeout = matches!(ping, surge_ping::SurgeError::Timeout { .. });
if !ping_timeout {
error!("{}", ping.to_string());
msg = Some(BroadcastCommands::Error(uuid.clone()));
}
if timer.elapsed() >= Duration::minutes(config.pingtimeout) {
msg = Some(BroadcastCommands::Timeout(uuid.clone()));
}
} else {
let (_, duration) = ping.map_err(|err| error!("{}", err.to_string())).expect("fatal error");
debug!("ping took {:?}", duration);
msg = Some(BroadcastCommands::Success(uuid.clone()));
};
}
let msg = msg.expect("fatal error");
let _ = tx.send(msg.clone());
if let BroadcastCommands::Success(..) = msg {
sqlx::query!(
r#"
UPDATE devices
SET times = array_append(times, $1)
WHERE id = $2;
"#,
timer.elapsed().whole_seconds(),
device.id
).execute(db).await.unwrap();
ping_map.insert(uuid.clone(), Value { ip: device.ip.clone(), online: true });
tokio::time::sleep(tokio::time::Duration::from_secs(60)).await;
}
trace!("remove {} from ping_map", uuid);
ping_map.remove(&uuid);
}
#[derive(Clone, Debug, PartialEq)]
pub enum BroadcastCommands {
Success(String),
Timeout(String),
Error(String),
}
pub async fn status_websocket(mut socket: WebSocket, state: Arc<AppState>) {
trace!("wait for ws message (uuid)");
let msg = socket.recv().await;
let uuid = msg.unwrap().unwrap().into_text().unwrap();
trace!("Search for uuid: {}", uuid);
let eta = get_eta(&state.db).await;
let _ = socket.send(Message::Text(format!("eta_{eta}_{uuid}"))).await;
let device_exists = state.ping_map.contains_key(&uuid);
if device_exists {
let _ = socket.send(process_device(state.clone(), uuid).await).await;
} else {
debug!("didn't find any device");
let _ = socket.send(Message::Text(format!("notfound_{uuid}"))).await;
};
let _ = socket.close().await;
}
async fn get_eta(db: &PgPool) -> i64 {
let query = sqlx::query!(
r#"SELECT times FROM devices;"#
).fetch_one(db).await.unwrap();
let times = match query.times {
None => { vec![0] },
Some(t) => t,
};
times.iter().sum::<i64>() / i64::try_from(times.len()).unwrap()
}
async fn process_device(state: Arc<AppState>, uuid: String) -> Message {
let pm = state.ping_map.clone().into_read_only();
let device = pm.get(&uuid).expect("fatal error");
debug!("got device: {} (online: {})", device.ip, device.online);
if device.online {
debug!("already started");
Message::Text(format!("start_{uuid}"))
} else {
loop {
trace!("wait for tx message");
let message = state.ping_send.subscribe().recv().await.expect("fatal error");
trace!("got message {:?}", message);
return match message {
BroadcastCommands::Success(msg_uuid) => {
if msg_uuid != uuid { continue; }
trace!("message == uuid success");
Message::Text(format!("start_{uuid}"))
},
BroadcastCommands::Timeout(msg_uuid) => {
if msg_uuid != uuid { continue; }
trace!("message == uuid timeout");
Message::Text(format!("timeout_{uuid}"))
},
BroadcastCommands::Error(msg_uuid) => {
if msg_uuid != uuid { continue; }
trace!("message == uuid error");
Message::Text(format!("error_{uuid}"))
}
}
}
}
}
|
