feat: with enroll

Signed-off-by: kjuulh <contact@kjuulh.io>

crates/churn-server/Cargo.toml

@@ -12,4 +12,6 @@ tracing.workspace = true
 tracing-subscriber.workspace = true
 clap.workspace = true
 dotenv.workspace = true
-axum.workspace = true
+axum.workspace = true
+serde.workspace = true
+serde_json.workspace = true

crates/churn-server/src/main.rs

@@ -2,10 +2,15 @@ use std::collections::HashMap;
 use std::net::SocketAddr;
 use std::sync::Arc;
 
-use axum::response::IntoResponse;
+use anyhow::Error;
+use axum::extract::State;
+use axum::http::StatusCode;
+use axum::response::{IntoResponse, Response};
 use axum::routing::{get, post};
-use axum::{async_trait, Router};
+use axum::{async_trait, Json, Router};
 use clap::{Parser, Subcommand};
+use serde::{Deserialize, Serialize};
+use serde_json::json;
 use tokio::sync::Mutex;
 
 #[derive(Parser)]
@@ -23,8 +28,17 @@ enum Commands {
     },
 }
 
+#[derive(Clone)]
 struct AgentService(Arc<dyn AgentServiceTrait + Send + Sync + 'static>);
 
+impl std::ops::Deref for AgentService {
+    type Target = Arc<dyn AgentServiceTrait + Send + Sync + 'static>;
+
+    fn deref(&self) -> &Self::Target {
+        &self.0
+    }
+}
+
 impl Default for AgentService {
     fn default() -> Self {
         Self(Arc::new(DefaultAgentService::default()))
@@ -43,23 +57,40 @@ impl Default for DefaultAgentService {
     }
 }
 
-#[async_trait]
-impl AgentServiceTrait for DefaultAgentService {
-    async fn enroll(&self, agent: Agent) -> anyhow::Result<String> {
-        todo!()
-    }
-}
-
 #[async_trait]
 trait AgentServiceTrait {
     async fn enroll(&self, agent: Agent) -> anyhow::Result<String>;
 }
 
+#[async_trait]
+impl AgentServiceTrait for DefaultAgentService {
+    async fn enroll(&self, agent: Agent) -> anyhow::Result<String> {
+        let mut agents = self.agents.lock().await;
+
+        match agents.insert(agent.name.clone(), agent.clone()) {
+            Some(_) => {
+                tracing::debug!("agents store already contained agent, replaced existing");
+
+                Ok(agent.name)
+            }
+            None => {
+                tracing::debug!("agents store didn't contain agent, inserted");
+
+                Ok(agent.name)
+            }
+        }
+    }
+}
+
+#[derive(Clone, Debug, Deserialize, Serialize)]
 struct Agent {
     pub name: String,
 }
 
-struct AppState {}
+#[derive(Clone)]
+struct AppState {
+    agent: AgentService,
+}
 
 #[tokio::main]
 async fn main() -> anyhow::Result<()> {
@@ -81,7 +112,9 @@ async fn main() -> anyhow::Result<()> {
                         .route("/ping", post(agent_ping))
                         .route("/events", post(get_tasks)),
                 )
-                .with_state();
+                .with_state(AppState {
+                    agent: AgentService::default(),
+                });
 
             tracing::info!("churn server listening on {}", host);
             axum::Server::bind(&host)
@@ -95,8 +128,42 @@ async fn main() -> anyhow::Result<()> {
     Ok(())
 }
 
-async fn enroll() -> impl IntoResponse {
-    todo!()
+enum AppError {
+    Internal(Error),
+}
+
+impl IntoResponse for AppError {
+    fn into_response(self) -> Response {
+        let (status, error_message) = match self {
+            AppError::Internal(e) => {
+                tracing::error!("failed with error: {}", e);
+
+                (
+                    StatusCode::INTERNAL_SERVER_ERROR,
+                    "failed with internal error",
+                )
+            }
+        };
+
+        let body = Json(json!({
+            "error": error_message,
+        }));
+
+        (status, body).into_response()
+    }
+}
+
+async fn enroll(
+    State(state): State<AppState>,
+    Json(agent): Json<Agent>,
+) -> Result<Json<Agent>, AppError> {
+    let _ = state
+        .agent
+        .enroll(agent.clone())
+        .await
+        .map_err(|e| AppError::Internal(e));
+
+    Ok(Json(agent))
 }
 
 async fn agent_ping() -> impl IntoResponse {