1 files changed, 85 insertions, 0 deletions
diff --git a/app/server/bridge.js b/app/server/bridge.js
new file mode 100644
index 0000000..6168580
--- /dev/null
+++ b/app/server/bridge.js
@@ -0,0 +1,85 @@
+import { server } from './site'
+import socket_io from 'socket.io'
+
+const io = socket_io(server)
+let relay_connected = false
+
+export const client = io.of('/client')
+client.on('connect', bind_client)
+
+export const relay = (() => {
+  let relay;
+  if (process.env.EXPRESS_CONNECTS_TO_RELAY === 'true') {
+    console.log('Connecting to relay on ' + process.env.RELAY_REMOTE)
+    relay = require('socket.io-client').connect(process.env.RELAY_REMOTE)
+    bind_relay(relay)
+  } else {
+    relay = io.of('/relay')
+    relay.on('connect', bind_relay)
+  }
+  return relay
+})()
+
+function bind_relay(socket) {
+  console.log('Relay connected')
+  relay_connected = true
+  client.emit('system_res', { type: 'relay_connected' })
+
+  socket.on('res', data => {
+    // console.log('Received response', data.cmd)
+    client.emit('res', data)
+  })
+
+  socket.on('status', data => {
+    // console.log('Received status', data.key)
+    client.emit('status', data)
+  })
+
+  socket.on('system_res', data => {
+    // console.log('System responded', data.type)
+    client.emit('system_res', data)
+  })
+
+  socket.on('task_res', data => {
+    client.emit('task_res', data)
+  })
+
+  socket.on('frame', (data) => {
+    client.volatile.emit('frame', data)
+  })
+
+  socket.on('disconnect', () => {
+    console.log('Relay disconnected')
+    relay_connected = false
+    client.emit('system_res', { type: 'relay_disconnected' })
+  })
+}
+
+function bind_client(socket){
+  console.log('Client connected')
+  if (relay_connected) {
+    socket.emit('system_res', { type: 'relay_connected' })
+    relay.emit('system', { cmd: 'get_status' })
+  } else {
+    socket.emit('system_res', { type: 'relay_disconnected' })
+  }
+
+  socket.on('cmd', data => {
+    // console.log('Client sent command', data)
+    relay.emit('cmd', data)
+  })
+  
+  socket.on('system', data => {
+    // console.log('Client sent system command', data)
+    relay.emit('system', data)
+  })
+
+  socket.on('task', data => {
+    // console.log('Client sent task command', data)
+    relay.emit('task', data)
+  })
+
+  socket.on('disconnect', () => {
+    console.log('Client disconnected')
+  })
+}