greatly improve user caching system

bot/events/index.ts

@@ -1,5 +1,9 @@
 import { eventSub } from "..";
 
+eventSub.onRevoke(event => {
+  console.info(`Successfully revoked EventSub subscription: ${event.id}`);
+});
+
 eventSub.onSubscriptionCreateSuccess(event => {
   console.info(`Successfully created EventSub subscription: ${event.id}`);
 });

bot/events/message.ts

@@ -1,13 +1,16 @@
 import { redis } from "bun";
-import { chatterId, streamerId, eventSub, commandPrefix } from "..";
+import { chatterId, streamerId, eventSub, commandPrefix, singleUserMode } from "..";
 import { User } from "../user";
 import commands, { sendMessage } from "../commands";
 
-console.info(`Loaded the ${commands.keys().toArray().join(', ')} commands`);
+console.info(`Loaded the following commands: ${commands.keys().toArray().join(', ')}`);
 
 eventSub.onChannelChatMessage(streamerId, streamerId, async msg => {
+  // return if double user mode is on and the chatter says something, we don't need them
+  if (!singleUserMode && msg.chatterId === chatterId) return
+
   // Get user from cache or place user in cache
-  const user = await User.init(msg.chatterName);
+  const user = await User.initUserId(msg.chatterId);
 
   // Manage vulnerable chatters
   if (![chatterId, streamerId].includes(msg.chatterId)) {// Don't add the chatter or streamer to the vulnerable chatters

bot/user.ts

@@ -1,45 +1,82 @@
 import { redis } from "bun";
 import { chatterApi } from ".";
+import { HelixUser } from "@twurple/api"
+
+const EXPIRETIME = 60 * 15 // 15 minutes
 
 export class User {
-  constructor(username: string) {
-    this.username = username;
-  };
+  public username: string | undefined;
+  public id: string | undefined;
+  public displayName: string | undefined;
 
-  public username: string;
-  public id: string | undefined | null; // The null here and below serves the function to make typescript shut the fuck up
-  public displayName: string | undefined | null;
-
-  static async init(username: string): Promise<User | null> {
-    const userObj = new User(username);
-    const cachedata = await redis.exists(`user:${username}`);
-    if (!cachedata) {
-      const twitchdata = await chatterApi.users.getUserByName(username!);
-      if (!twitchdata) return null; // User does not exist in redis and twitch api can't get them: return null
-      await redis.set(`user:${username}:id`, twitchdata.id);
-      await redis.set(`user:${username}:displayName`, twitchdata.displayName);
-      await redis.set(`user:${username}:itemlock`, '0');
+  static async initUsername(username: string): Promise<User | null> {
+    const userObj = new User();
+    userObj.username = username;
+    const userid = await redis.get(`userlookup:${username}`);
+    if (!userid) {
+      const userdata = await chatterApi.users.getUserByName(username);
+      if (!userdata) return null;
+      userObj._setCache(userdata);
+      userObj.id = userdata.id;
+      userObj.displayName = userdata.displayName;
+    } else {
+      const displayname = await redis.get(`user:${userid}:displayName`);
+      userObj._setExpire(userid, username);
+      userObj.id = userid;
+      userObj.displayName = displayname!;
     };
-    await userObj._setOptions();
     return userObj;
   };
 
-  private async _setOptions(): Promise<void> {
-    this.id = await redis.get(`user:${this.username}:id`);
-    this.displayName = await redis.get(`user:${this.username}:displayName`);
+  static async initUserId(userId: string): Promise<User | null> {
+    const userObj = new User();
+    userObj.id = userId;
+    if (!await redis.exists(`user:${userId}:displayName`)) {
+      const userdata = await chatterApi.users.getUserById(userId);
+      if (!userdata) return null;
+      userObj._setCache(userdata);
+      userObj.username = userdata.name;
+      userObj.displayName = userdata.displayName;
+    } else {
+      const [displayName, username] = await Promise.all([
+        redis.get(`user:${userId}:displayName`),
+        redis.get(`user:${userId}:username`)
+      ]);
+      userObj._setExpire(userId, username!);
+      userObj.username = username!;
+      userObj.displayName = displayName!;
+    };
+    return userObj;
+  };
+
+  private async _setCache(userdata: HelixUser) {
+    await Promise.all([
+      redis.set(`user:${userdata.id}:displayName`, userdata.displayName),
+      redis.set(`user:${userdata.id}:username`, userdata.name),
+      redis.set(`userlookup:${userdata.name}`, userdata.id)
+    ]);
+    await this._setExpire(userdata.id, userdata.name);
+  };
+
+  private async _setExpire(userId: string, userName: string) {
+    await Promise.all([
+      redis.expire(`user:${userId}:displayName`, EXPIRETIME),
+      redis.expire(`user:${userId}:username`, EXPIRETIME),
+      redis.expire(`userlookup:${userName}`, EXPIRETIME)
+    ]);
   };
 
   public async itemLock(): Promise<boolean> {
-    const lock = await redis.get(`user:${this.username}:itemlock`);
+    const lock = await redis.get(`user:${this.id}:itemlock`);
     if (lock === '0') return false;
     return true;
   };
 
   public async setLock(): Promise<void> {
-    await redis.set(`user:${this.username}:itemlock`, '1');
+    await redis.set(`user:${this.id}:itemlock`, '1');
   };
 
   public async clearLock(): Promise<void> {
-    await redis.set(`user:${this.username}:itemlock`, '0');
+    await redis.set(`user:${this.id}:itemlock`, '0');
   };
 };