tandem-server 0.4.23

HTTP server for Tandem engine APIs
Documentation 
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use serde::Serialize;
use tokio::sync::RwLock;

use std::sync::Arc;

use crate::now_ms;

#[derive(Debug, Clone, Serialize)]
pub struct ActiveRun {
    #[serde(rename = "runID")]
    pub run_id: String,
    #[serde(rename = "startedAtMs")]
    pub started_at_ms: u64,
    #[serde(rename = "lastActivityAtMs")]
    pub last_activity_at_ms: u64,
    #[serde(rename = "clientID", skip_serializing_if = "Option::is_none")]
    pub client_id: Option<String>,
    #[serde(rename = "agentID", skip_serializing_if = "Option::is_none")]
    pub agent_id: Option<String>,
    #[serde(rename = "agentProfile", skip_serializing_if = "Option::is_none")]
    pub agent_profile: Option<String>,
}

#[derive(Clone, Default)]
pub struct RunRegistry {
    active: Arc<RwLock<std::collections::HashMap<String, ActiveRun>>>,
}

impl RunRegistry {
    pub fn new() -> Self {
        Self::default()
    }

    pub async fn get(&self, session_id: &str) -> Option<ActiveRun> {
        self.active.read().await.get(session_id).cloned()
    }

    pub async fn acquire(
        &self,
        session_id: &str,
        run_id: String,
        client_id: Option<String>,
        agent_id: Option<String>,
        agent_profile: Option<String>,
    ) -> std::result::Result<ActiveRun, ActiveRun> {
        let mut guard = self.active.write().await;
        if let Some(existing) = guard.get(session_id).cloned() {
            return Err(existing);
        }
        let now = now_ms();
        let run = ActiveRun {
            run_id,
            started_at_ms: now,
            last_activity_at_ms: now,
            client_id,
            agent_id,
            agent_profile,
        };
        guard.insert(session_id.to_string(), run.clone());
        Ok(run)
    }

    pub async fn touch(&self, session_id: &str, run_id: &str) {
        let mut guard = self.active.write().await;
        if let Some(run) = guard.get_mut(session_id) {
            if run.run_id == run_id {
                run.last_activity_at_ms = now_ms();
            }
        }
    }

    pub async fn finish_if_match(&self, session_id: &str, run_id: &str) -> Option<ActiveRun> {
        let mut guard = self.active.write().await;
        if let Some(run) = guard.get(session_id) {
            if run.run_id == run_id {
                return guard.remove(session_id);
            }
        }
        None
    }

    pub async fn finish_active(&self, session_id: &str) -> Option<ActiveRun> {
        self.active.write().await.remove(session_id)
    }

    pub async fn reap_stale(&self, stale_ms: u64) -> Vec<(String, ActiveRun)> {
        let now = now_ms();
        let mut guard = self.active.write().await;
        let stale_ids = guard
            .iter()
            .filter_map(|(session_id, run)| {
                if now.saturating_sub(run.last_activity_at_ms) > stale_ms {
                    Some(session_id.clone())
                } else {
                    None
                }
            })
            .collect::<Vec<_>>();
        let mut out = Vec::with_capacity(stale_ids.len());
        for session_id in stale_ids {
            if let Some(run) = guard.remove(&session_id) {
                out.push((session_id, run));
            }
        }
        out
    }
}