notification to subscribers on groups

2021-09-14 22:06:37 -07:00
parent 52617bbcec
commit 0907c1c1b5
2 changed files with 59 additions and 18 deletions
--- a/mongoDB.js
+++ b/mongoDB.js
@@ -39,6 +39,15 @@ const getDB = new Promise((resolve, reject) => {
            return DB.usersCol.findOne({ _id });
        }

+        let usernamesCache = {}
+        DB.getUsernameByIdCache = async (userid)=>{
+            if(usernamesCache[userid]) return usernamesCache[userid];
+            const _id = new mongo.ObjectID(userid);
+            let user = await DB.usersCol.findOne({ _id });
+            usernamesCache[userid] = user.username;
+            return usernamesCache[userid];
+        }
+
        DB.newUser = (userInformation)=>{
            return DB.usersCol.insertOne(userInformation).catch((err)=>{
                console.log(err);