Initial commit

api/events/eventBus.ts

@@ -0,0 +1,35 @@
+import type { Response } from 'express'
+import { logger } from '../utils/logger.js'
+
+type NotebookEvent = {
+  event: string
+  path?: string
+}
+
+let clients: Response[] = []
+
+export const eventBus = {
+  addClient: (res: Response) => {
+    clients.push(res)
+    logger.info(`SSE client connected. Total clients: ${clients.length}`)
+  },
+  removeClient: (res: Response) => {
+    clients = clients.filter((c) => c !== res)
+    logger.info(`SSE client disconnected. Total clients: ${clients.length}`)
+  },
+  broadcast: (payload: NotebookEvent) => {
+    const data = `data: ${JSON.stringify(payload)}
+
+`
+    logger.info(`Broadcasting to ${clients.length} clients: ${payload.event} - ${payload.path || ''}`)
+    clients = clients.filter((client) => {
+      try {
+        client.write(data)
+        return true
+      } catch (error) {
+        logger.warn('SSE client write failed, removing')
+        return false
+      }
+    })
+  },
+}