From 1a40b90e29dc61ed28ad251b49e9175a2215c3d0 Mon Sep 17 00:00:00 2001
From: MikunoNaka <bokuwakanojogahoshii@yahoo.com>
Date: Sun, 1 Aug 2021 02:09:41 +0530
Subject: added functionality to detect incorrect room code

---
 src/server/index.js | 23 ++++++++++++++++-------
 1 file changed, 16 insertions(+), 7 deletions(-)

(limited to 'src/server/index.js')

diff --git a/src/server/index.js b/src/server/index.js
index a4c9c5c..5eeff99 100644
--- a/src/server/index.js
+++ b/src/server/index.js
@@ -12,20 +12,24 @@ const io = require("socket.io")(http, {
   }
 });
 
-// also checks for duplicates
-const getCode = () => {
-  const code = `${Math.floor(1000 + Math.random() * 9000)}`;
-
+// check if room exists
+const checkCode = (code) => {
   const connectedSockets = [];
   io.sockets.sockets.forEach(
     (i) => connectedSockets.push(i)
   );
 
+  // returns true if room exists
   return connectedSockets.some(
     (i) => Array.from(i.rooms)[1] === code
-  ) ? getCode() : code;
+  );
 }
 
+// generate new room code
+// also checks for duplicates
+const getCode = (code = `${Math.floor(1000 + Math.random() * 9000)}`) =>
+  checkCode(code) ? getCode : code;
+
 const allEqual = (arr) =>
   arr.includes(2) ? false : arr.every(i => i === arr[0])
 
@@ -59,8 +63,13 @@ io.on('connection', (socket) => {
   });
 
   socket.on('join', (code) => {
-    socket.join(code);
-    io.to(code).emit('user joined');
+    if (checkCode(code)) {
+      socket.join(code);
+      io.to(code).emit('player joined');
+    } else {
+      // error if room doesn't exist
+      socket.emit('join failed')
+    }
   });
 
   socket.on('update-remote-data', (data) => {
-- 
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