refactor: extract telemetry init to telemetry.rs

k-tv-backend/api/src/telemetry.rs

@@ -0,0 +1,25 @@
+use std::collections::VecDeque;
+use std::sync::{Arc, Mutex};
+
+use tokio::sync::broadcast;
+use tracing_subscriber::{EnvFilter, fmt, layer::SubscriberExt, util::SubscriberInitExt};
+
+use crate::log_layer::{AppLogLayer, LogLine};
+
+pub struct LoggingHandles {
+    pub log_tx: broadcast::Sender<LogLine>,
+    pub log_history: Arc<Mutex<VecDeque<LogLine>>>,
+}
+
+pub fn init_tracing() -> LoggingHandles {
+    let (log_tx, _) = broadcast::channel::<LogLine>(512);
+    let log_history = Arc::new(Mutex::new(VecDeque::<LogLine>::new()));
+
+    tracing_subscriber::registry()
+        .with(EnvFilter::try_from_default_env().unwrap_or_else(|_| EnvFilter::new("info")))
+        .with(fmt::layer())
+        .with(AppLogLayer::new(log_tx.clone(), Arc::clone(&log_history)))
+        .init();
+
+    LoggingHandles { log_tx, log_history }
+}