Messages from io gets saved to redis in message list. Endpoint for clearing, should be called when a lottery is ended.

api/chat.js

@@ -1,4 +1,7 @@
-module.exports = io => {
+const path = require("path");
+const { addMessage } = require(path.join(__dirname + "/redis.js"));
+
+const io = (io) => {
   io.on("connection", socket => {
     let username = null;
 
@@ -19,7 +22,10 @@ module.exports = io => {
     socket.on("chat", msg => {
       msg.username = username;
       msg.timestamp = new Date().getTime();
+      addMessage(msg);
       io.emit("chat", msg);
     });
   });
 };
+
+module.exports = io;

api/chatHistory.js

@@ -0,0 +1,33 @@
+const express = require("express");
+const path = require("path");
+const router = express.Router();
+
+const { history, clearHistory } = require(path.join(__dirname + "/../api/redis"));
+
+router.use((req, res, next) => {
+  next();
+});
+
+router.route("/chat/history").get(async (req, res) => {
+  let { skip, take } = req.query;
+  skip = !isNaN(skip) ? Number(skip) : undefined;
+  take = !isNaN(take) ? Number(take) : undefined;
+
+  try {
+    const messages = await history(skip, take);
+    res.json(messages)
+  } catch(error) {
+    res.status(500).send(error);
+  }
+});
+
+router.route("/chat/history").delete(async (req, res) => {
+  try {
+    const messages = await clearHistory();
+    res.json(messages)
+  } catch(error) {
+    res.status(500).send(error);
+  }
+});
+
+module.exports = router;