From 73d7bab8844bb21c7a9143c30800c2d11d411e42 Mon Sep 17 00:00:00 2001
From: rtkay123 <dev@kanjala.com>
Date: Sun, 17 Aug 2025 20:02:49 +0200
Subject: feat: typology processor (#8)

---
 crates/typologies/src/processor.rs | 124 +++++++++++++++++++++++++++++++++++++
 1 file changed, 124 insertions(+)
 create mode 100644 crates/typologies/src/processor.rs

(limited to 'crates/typologies/src/processor.rs')

diff --git a/crates/typologies/src/processor.rs b/crates/typologies/src/processor.rs
new file mode 100644
index 0000000..a2a3b17
--- /dev/null
+++ b/crates/typologies/src/processor.rs
@@ -0,0 +1,124 @@
+mod driver;
+mod publish;
+mod reload;
+mod typology;
+
+use std::sync::Arc;
+
+use anyhow::Result;
+use async_nats::jetstream::{
+    Context,
+    consumer::{Consumer, pull},
+};
+use futures_util::{StreamExt, future};
+use tokio::signal;
+use tracing::{error, trace, warn};
+use warden_stack::{Configuration, tracing::SdkTracerProvider};
+
+use crate::{
+    cnfg::Nats,
+    state::{AppHandle, AppState, Services},
+};
+
+pub async fn serve(
+    services: Services,
+    config: Configuration,
+    provider: SdkTracerProvider,
+) -> anyhow::Result<()> {
+    let state = Arc::new(AppState::new(services, config).await?);
+
+    tokio::select! {
+        _ = futures_util::future::try_join(reload::reload(Arc::clone(&state)), run(state)) => {}
+        _ = shutdown_signal(provider) => {}
+    };
+
+    Ok(())
+}
+
+async fn run(state: AppHandle) -> anyhow::Result<()> {
+    let consumer = get_or_create_stream(&state.services.jetstream, &state.config.nats).await?;
+
+    let limit = None;
+
+    consumer
+        .messages()
+        .await?
+        .for_each_concurrent(limit, |message| {
+            let state = Arc::clone(&state);
+            tokio::spawn(async move {
+                match message {
+                    Ok(message) => {
+                        if let Err(e) = typology::process_typology(message, state).await {
+                            error!("{e:?}");
+                        }
+                    }
+                    Err(e) => {
+                        warn!("{e:?}");
+                    }
+                }
+            });
+            future::ready(())
+        })
+        .await;
+
+    Ok(())
+}
+
+async fn get_or_create_stream(
+    jetstream: &Context,
+    nats: &Nats,
+) -> anyhow::Result<Consumer<pull::Config>> {
+    let name = format!("{}.v{}", env!("CARGO_PKG_NAME"), env!("CARGO_PKG_VERSION"))
+        .replace(".", "")
+        .replace("_", "");
+    trace!(name = name, subjects = ?nats.subjects, "getting or creating stream");
+
+    let stream = jetstream
+        .get_or_create_stream(async_nats::jetstream::stream::Config {
+            name,
+            subjects: nats.subjects.iter().map(Into::into).collect(),
+            max_messages: nats.max_messages,
+            ..Default::default()
+        })
+        .await?;
+    let durable = nats.durable_name.to_string();
+    // Get or create a pull-based consumer
+    Ok(stream
+        .get_or_create_consumer(
+            durable.as_ref(),
+            async_nats::jetstream::consumer::pull::Config {
+                durable_name: Some(durable.to_string()),
+                ..Default::default()
+            },
+        )
+        .await?)
+}
+
+async fn shutdown_signal(provider: SdkTracerProvider) -> Result<()> {
+    let ctrl_c = async {
+        signal::ctrl_c()
+            .await
+            .expect("failed to install Ctrl+C handler");
+    };
+
+    #[cfg(unix)]
+    let terminate = async {
+        signal::unix::signal(signal::unix::SignalKind::terminate())
+            .expect("failed to install signal handler")
+            .recv()
+            .await;
+    };
+
+    #[cfg(not(unix))]
+    let terminate = std::future::pending::<()>();
+
+    tokio::select! {
+        _ = ctrl_c => {
+        },
+        _ = terminate => {
+        },
+    }
+    let _ = provider.shutdown();
+
+    Ok(())
+}
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