cache readme data

src/routes/index.js

@@ -5,7 +5,7 @@ const readme = require('../utils/readme')
 
 // Home Page
 router.get('/', (_, res) => {
-    readme.data()
+    readme.get()
         .then(data => res.render('index', { readme: marked.parse(data) }))
 })
 

src/utils/readme.js

@@ -1,10 +1,29 @@
 const fetch = require('node-fetch')
 
-async function data () {
-    return await fetch('https://git.kennel.ml/Anri/Constnium/raw/branch/main/README.md')
-        .then(res => res.text())
+// URL of the repo
+const repoURL = 'https://git.kennel.ml/Anri/Constnium/raw/branch/main/README.md'
+
+// Store the data from the repo
+let data = null
+
+// Store last time data as been pulled from the repo
+let timestamp = 0
+
+// Retrieve the data from the repo
+async function get () {
+    const now = Date.now()
+    // If data is older than one day, refresh it
+    if (Math.ceil(Math.abs(now - timestamp) / (1000 * 3600 * 24)) > 2 || data === null) {
+        await fetch(repoURL)
+            .then(res => {
+                data = res.text()
+                timestamp = now
+            })
+    }
+
+    return data
 }
 
 module.exports = {
-    data
+    get
 }