Store messages in database

.gitignore

@@ -1 +1,2 @@
 node_modules
+data.db

index.js

@@ -1,5 +1,13 @@
-const express = require('express')
-var exphbs  = require('express-handlebars')
+import express from 'express'
+import exphbs from 'express-handlebars'
+
+import sqlite3 from 'sqlite3'
+import { open } from 'sqlite'
+
+const dbPromise = open({
+  filename: 'data.db',
+  driver: sqlite3.Database
+})
 
 const app = express()
 
@@ -8,19 +16,16 @@ app.set('view engine', 'handlebars');
 
 app.use(express.urlencoded())
 
-const messages = [
-  'hello world',
-  'is anybody out there',
-  'who\'s there?'
-]
-
-app.get('/', (req, res) => {
+app.get('/', async (req, res) => {
+  const db = await dbPromise;
+  const messages = await db.all('SELECT * FROM Message;')
   res.render('home', { messages })
 })
 
-app.post('/message', (req, res) => {
+app.post('/message', async (req, res) => {
+  const db = await dbPromise
   const messageText = req.body.messageText
-  messages.push(messageText)
+  await db.run('INSERT INTO Message (text) VALUES (?);', messageText)
   res.redirect('/')
 })
 
@@ -28,6 +33,11 @@ app.get('/time', (req, res) => {
   res.send('the current time is ' + (new Date()).toLocaleTimeString())
 })
 
-app.listen(8000, () => {
-  console.log('listening on localhost:8000')
-})
+const setup = async () => {
+  const db = await dbPromise
+  await db.migrate()
+  app.listen(8000, () => {
+    console.log('listening on localhost:8000')
+  })
+}
+setup()

migrations/001-initial-schema.sql

@@ -0,0 +1,10 @@
+-- Up
+
+CREATE TABLE Message (
+  id INTEGER PRIMARY KEY,
+  text STRING
+);
+
+-- Down
+
+DROP TABLE Message;

package.json

@@ -4,12 +4,16 @@
   "description": "",
   "main": "index.js",
   "scripts": {
+    "start": "node -r esm index.js",
     "test": "echo \"Error: no test specified\" && exit 1"
   },
   "author": "",
   "license": "ISC",
   "dependencies": {
+    "esm": "^3.2.25",
     "express": "^4.17.1",
-    "express-handlebars": "^5.3.2"
+    "express-handlebars": "^5.3.2",
+    "sqlite": "^4.0.23",
+    "sqlite3": "^5.0.2"
   }
 }

views/home.handlebars

@@ -3,7 +3,7 @@
 <ul>
   <li>this is always there</li>
   {{#each messages}}
-  <li style="font-style:italic">{{this}}</li>
+  <li style="font-style:italic">{{id}}: {{text}}</li>
   {{/each}}
 </ul>