part 12 done

Pt12/part12-containers-applications/todo-app/todo-backend/redis/index.js

@@ -0,0 +1,27 @@
+const redis = require('redis')
+const { promisify } = require('util')
+const { REDIS_URL } = require('../util/config')
+
+let getAsync
+let setAsync
+
+if (!REDIS_URL) {
+  const redisIsDisabled = () => {
+    console.log('No REDIS_URL set, Redis is disabled')
+    return null
+  }
+  getAsync = redisIsDisabled
+  setAsync = redisIsDisabled
+} else {
+  const client = redis.createClient({
+    url: REDIS_URL
+  })
+    
+  getAsync = promisify(client.get).bind(client)
+  setAsync = promisify(client.set).bind(client)    
+}
+
+module.exports = {
+  getAsync,
+  setAsync
+}