Add Hermes operations management layer

backend/src/action/hermes.ts

@@ -0,0 +1,39 @@
+import type { Room } from '@livekit/rtc-node';
+import type { Collision, DataMessage, HermesMessage, Intervention } from '@podman/shared';
+import { DATA_TOPIC } from '@podman/shared';
+
+const encoder = new TextEncoder();
+
+function teammateText(collision: Collision, intervention: Intervention): string {
+  return `${collision.engineers.join(', ')}: ${intervention.message}`;
+}
+
+export function createHermesMessage(
+  collision: Collision,
+  intervention: Intervention,
+): HermesMessage {
+  return {
+    id: `hermes_${Date.now()}`,
+    podId: collision.podId,
+    interventionId: intervention.id,
+    recipients: collision.engineers,
+    text: teammateText(collision, intervention),
+    urgency: collision.severity === 'critical' ? 'urgent' : 'normal',
+    createdAt: new Date().toISOString(),
+  };
+}
+
+export async function publishHermesMessage(
+  room: Room,
+  collision: Collision,
+  intervention: Intervention,
+): Promise<void> {
+  const data: DataMessage = {
+    type: 'HERMES_MESSAGE',
+    message: createHermesMessage(collision, intervention),
+  };
+  await room.localParticipant?.publishData(encoder.encode(JSON.stringify(data)), {
+    reliable: true,
+    topic: DATA_TOPIC,
+  });
+}