From 1cc6597bbdff00d6355c83069edb891cefa57c28 Mon Sep 17 00:00:00 2001
From: Carl Worth <cworth@cworth.org>
Date: Tue, 6 Dec 2022 21:21:29 -0800
Subject: [PATCH] Add peristence of comments
The server saves every message it receives, and replays them to each
new client when it joins.
Note: The server is only holding messages in memory, so there's not
yet any persistence across server restarts.
---
index.js | 12 ++++++++++--
1 file changed, 10 insertions(+), 2 deletions(-)
diff --git a/index.js b/index.js
index 27b3714..80526a3 100644
--- a/index.js
+++ b/index.js
@@ -6,13 +6,21 @@ const { Server } = require("socket.io");
const io = new Server(server);
const port = 2122;
+comments = [];
+
app.get('/index.html', (req, res) => {
res.sendFile(__dirname + '/index.html');
});
io.on('connection', (socket) => {
- socket.on('comment', (msg) => {
- io.emit('comment', msg);
+ // Replay old comments to a newly-joining client
+ comments.forEach((comment) => {
+ socket.emit('comment', comment)
+ });
+ // When any client comments, send that to all clients (including sender)
+ socket.on('comment', (comment) => {
+ io.emit('comment', comment);
+ comments.push(comment);
});
});
--
2.45.2