modularize code, add dummy version of roverd

server/src/services/commandService.js

@@ -0,0 +1,53 @@
+const { v4: uuidv4 } = require('uuid');
+const io = require('../globals/io');
+const roverManager = require('./roverManager');
+const { isAdmin } = require('./authService');
+
+const pendingCommands = new Map(); // id -> { roverId }
+
+function issueCommand(roverId, payload) {
+  const record = roverManager.rovers.get(roverId);
+  if (!record || !record.ws) {
+    throw new Error('Rover offline');
+  }
+  const id = uuidv4();
+  const message = { ...payload, id };
+  record.ws.send(JSON.stringify(message));
+  pendingCommands.set(id, { roverId, ts: Date.now(), type: payload.type });
+  return id;
+}
+
+function handleAck(msg) {
+  const pending = pendingCommands.get(msg.id);
+  if (!pending) return;
+  pendingCommands.delete(msg.id);
+  io.emit('commandAck', {
+    roverId: pending.roverId,
+    id: msg.id,
+    status: msg.status || 'ok',
+    error: msg.error,
+  });
+}
+
+module.exports = {
+  issueCommand,
+  handleAck,
+};
+
+io.on('connection', (socket) => {
+  socket.on('command', ({ roverId, type, data } = {}, cb = () => {}) => {
+    try {
+      if (!roverId) {
+        throw new Error('roverId required');
+      }
+      if (!roverManager.isDriver(roverId, socket) && !isAdmin(socket)) {
+        throw new Error('Not controlling this rover');
+      }
+      const payload = data ? { ...data } : {};
+      const id = issueCommand(roverId, { type, ...payload });
+      cb({ id });
+    } catch (err) {
+      cb({ error: err.message });
+    }
+  });
+});