Add .json extension to config file.

A tiny bit of refactoring.

app.js

@@ -74,16 +74,25 @@ router.get('/topics/:cluster', async (req, res, _next) => {
   }
 })
 
+const buildSocketMessageSender = ({ type, socket }) => message => {
+  socket.send(JSON.stringify({
+    type,
+    message
+  }))
+}
+
+const deepCopy = object => JSON.parse(JSON.stringify(object))
+
 const passwordPlaceholder = 'XXXXXXXXXXXXXXXXXXXXXXXXXXXX'
 
 const getClusterData = () =>
   Object.fromEntries(
-    Object.entries(clusters).map(([key, value]) => {
-      value = JSON.parse(JSON.stringify(value))
-      if (value.config.sasl?.password) {
-        value.config.sasl.password = passwordPlaceholder
+    Object.entries(clusters).map(([key, cluster]) => {
+      cluster = deepCopy(cluster)
+      if (cluster.config.sasl?.password) {
+        cluster.config.sasl.password = passwordPlaceholder
       }
-      return [key, value.config]
+      return [key, cluster.config]
     }))
 
 router.get('/clusters', async (req, res, _next) => {
@@ -132,13 +141,6 @@ router.put('/clusters', async (req, res, _next) => {
 
 app.use(router)
 
-const buildSocketMessageSender = ({ type, socket }) => message => {
-  socket.send(JSON.stringify({
-    type,
-    message
-  }))
-}
-
 const realTimeSearch = async ({ kafka, socket, topic }) =>
   query.realTimeMessageSearch({
     kafka,

config.js

@@ -2,7 +2,7 @@ const fs = require('fs')
 const path = require('path')
 const homedir = require('os').homedir()
 
-const configFilePath = homedir + path.sep + '.kafka-dance'
+const configFilePath = homedir + path.sep + '.kafka-dance.json'
 
 const emptyConfig = () => ({
   clusters: {},