Feat: refactor routes.js express entrypoint config

Feat: express config script refactor

Feat: add state and settingsCache files

lib/routes/logsRoutes.js

@@ -0,0 +1,35 @@
+const express = require('express')
+const router = express.Router()
+const _ = require('lodash/fp')
+
+const state = require('../middlewares/state')
+const logs = require('../logs')
+
+const THROTTLE_LOGS_QUERY = 30 * 1000
+
+function getLastSeen (req, res, next) {
+  const deviceId = req.deviceId
+  const timestamp = Date.now()
+  const shouldTrigger = !state.canGetLastSeenMap[deviceId] ||
+    timestamp - state.canGetLastSeenMap[deviceId] >= THROTTLE_LOGS_QUERY
+
+  if (shouldTrigger) {
+    state.canGetLastSeenMap[deviceId] = timestamp
+    return logs.getLastSeen(deviceId)
+      .then(r => res.json(r))
+      .catch(next)
+  }
+
+  return res.status(408).json({})
+}
+
+function updateLogs (req, res, next) {
+  return logs.update(req.deviceId, req.body.logs)
+    .then(status => res.json({ success: status }))
+    .catch(next)
+}
+
+router.get('/', getLastSeen)
+router.post('/', updateLogs)
+
+module.exports = router