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use std::sync::{Arc, Mutex};
use tokio::sync::mpsc;
use tokio_stream::wrappers::ReceiverStream;
use tonic::{Code, Request, Response, Status};
use uuid::Uuid;
use micro_traffic_sim::pb;
use micro_traffic_sim_core::geom::new_point;
use micro_traffic_sim_core::simulation::sessions_storage::SessionsStorage;
use micro_traffic_sim_core::traffic_lights::groups::TrafficLightGroup;
use micro_traffic_sim_core::traffic_lights::lights::TrafficLight;
use micro_traffic_sim_core::traffic_lights::signals::SignalType;
use super::BoxStream;
pub async fn push_session_tls(
sessions: Arc<Mutex<SessionsStorage>>,
request: Request<tonic::Streaming<pb::SessionTls>>,
) -> Result<Response<BoxStream<pb::SessionTlsResponse>>, Status> {
let mut stream = request.into_inner();
let (tx, rx) = mpsc::channel(16);
tokio::spawn(async move {
while let Ok(Some(req)) = stream.message().await {
// Validate session_id presence
let session_id = match &req.session_id {
Some(id) => &id.value,
None => {
let _ = tx
.send(Err(Status::invalid_argument("No session ID has been provided")))
.await;
return;
}
};
// Parse UUID
let session_uuid = match Uuid::parse_str(session_id) {
Ok(uuid) => uuid,
Err(_) => {
let _ = tx
.send(Err(Status::invalid_argument(format!(
"Session ID should be of type UUID v4: '{}'",
session_id
))))
.await;
return;
}
};
// Handle empty data with warning (like Go does)
if req.data.is_empty() {
let resp = pb::SessionTlsResponse {
code: Code::Ok as u32,
text: "[WARNING] Status: OK. No data".to_string(),
};
let _ = tx.send(Ok(resp)).await;
continue;
}
// Pre-validate all signals first (before acquiring session)
// This captures any signal parsing errors early
let mut parsed_signals: Vec<Vec<Vec<SignalType>>> = Vec::with_capacity(req.data.len());
for tl_data in &req.data {
let mut tl_signals = Vec::with_capacity(tl_data.groups.len());
for group_data in &tl_data.groups {
let mut signals: Vec<SignalType> = Vec::with_capacity(group_data.signals.len());
for (sig_idx, sig_str) in group_data.signals.iter().enumerate() {
match SignalType::from_str(sig_str) {
Ok(signal) => signals.push(signal),
Err(_) => {
let _ = tx
.send(Err(Status::invalid_argument(format!(
"Signal type '{}' not supported (group {}, signal index {})",
sig_str, group_data.id, sig_idx
))))
.await;
return;
}
}
}
tl_signals.push(signals);
}
parsed_signals.push(tl_signals);
}
// Get session and add traffic lights (use block scope to ensure lock is dropped before await)
let add_result = {
let mut sessions_guard = sessions.lock().unwrap();
sessions_guard.with_session_mut(&session_uuid, |session| {
let srid = session.get_world_srid();
// Convert proto traffic lights to core traffic lights
for (tl_idx, tl_data) in req.data.iter().enumerate() {
// Convert times
let times: Vec<i32> = tl_data.times.iter().map(|t| *t as i32).collect();
// Convert groups
let mut groups: Vec<TrafficLightGroup> = Vec::with_capacity(tl_data.groups.len());
for (group_idx, group_data) in tl_data.groups.iter().enumerate() {
// Convert geometry points
let geometry: Vec<_> = group_data
.geom
.iter()
.map(|p| new_point(p.x, p.y, Some(srid)))
.collect();
// Convert cell IDs
let cells_ids: Vec<i64> = group_data.cells.clone();
// Use pre-parsed signals
let signals = parsed_signals[tl_idx][group_idx].clone();
// Build group
let group = TrafficLightGroup::new(group_data.id)
.with_label(group_data.label.clone())
.with_geometry(geometry)
.with_cells_ids(cells_ids)
.with_signal(signals)
.build();
groups.push(group);
}
// Build traffic light
let mut tl_builder = TrafficLight::new(tl_data.id)
.with_groups(groups)
.with_phases_times(times);
// Set coordinates if provided
if let Some(geom) = &tl_data.geom {
tl_builder = tl_builder.with_coordinates(new_point(geom.x, geom.y, Some(srid)));
}
let tl = tl_builder.build();
session.add_traffic_light(tl);
}
})
};
if add_result.is_none() {
let _ = tx
.send(Err(Status::not_found(format!(
"Not found session ID: '{}'",
session_id
))))
.await;
return;
}
// Send OK response
let resp = pb::SessionTlsResponse {
code: Code::Ok as u32,
text: "OK".to_string(),
};
if tx.send(Ok(resp)).await.is_err() {
return;
}
}
});
let out: BoxStream<pb::SessionTlsResponse> = Box::pin(ReceiverStream::new(rx));
Ok(Response::new(out))
}