chore(csms): try WebSocket support

apps/csms/src/index.ts

@@ -1,15 +1,65 @@
+import pkg from '../../../package.json' with { type: 'json' }
 import { serve } from '@hono/node-server'
 import { Hono } from 'hono'
+import { createNodeWebSocket } from '@hono/node-ws'
+import { getConnInfo } from '@hono/node-server/conninfo'
+import { cors } from 'hono/cors'
+import { logger } from 'hono/logger'
+import { showRoutes } from 'hono/dev'
 
 const app = new Hono()
 
+const { injectWebSocket, upgradeWebSocket } = createNodeWebSocket({ app })
+
+app.use(logger())
+
+app.use('/ocpp', cors({
+  origin: '*',
+  allowMethods: ['GET', 'POST', 'OPTIONS'],
+  allowHeaders: ['Content-Type', 'Authorization'],
+  exposeHeaders: ['Content-Length'],
+  credentials: true,
+}))
+
 app.get('/', (c) => {
-  return c.text('Hello Hono!')
+  return c.json({
+    platform: 'Helios CSMS',
+    version: pkg.version,
+    message: 'ok',
+  })
 })
 
-serve({
-  fetch: app.fetch,
-  port: 3001
-}, (info) => {
-  console.log(`Server is running on http://localhost:${info.port}`)
+app.get(
+  '/ocpp',
+  upgradeWebSocket((c) => {
+    return {
+      onOpen(evt, ws) {
+        const connInfo = getConnInfo(c)
+        console.log(`New connection from ${connInfo.remote.address}:${connInfo.remote.port}`)
+      },
+      onMessage(evt, ws) {
+        console.log(`Received message: ${evt.data}`)
+        ws.send(`Echo: ${evt.data}`)
+      },
+      onClose(evt, ws) {
+        console.log('Connection closed: ', evt.code, evt.reason)
+      },
+    }
+  }),
+)
+
+showRoutes(app, {
+  verbose: true,
 })
+
+const server = serve(
+  {
+    fetch: app.fetch,
+    port: 3001,
+  },
+  (info) => {
+    console.log(`Server is running on http://localhost:${info.port}`)
+  },
+)
+
+injectWebSocket(server)