Add forgetting and personality change

src/helpers.ts

@@ -1,3 +1,4 @@
+import type { MatrixClient } from "matrix-js-sdk";
 import { config } from "./config.js";
 import { state } from "./store/store.js";
 import { type IUser, type TRole } from "./store/types.js";
@@ -98,6 +99,28 @@ const getUserFromMention = (mention: string | undefined): IUser | undefined => {
     return user;
 };
 
+const changePersonality = (
+    client: MatrixClient,
+    personalityName: string,
+): boolean => {
+    const personalityIndex = config.app.ai.personalities.findIndex(
+        (personality) => personality.personalityName === personalityName,
+    );
+    if (personalityIndex === -1) {
+        return false;
+    }
+
+    state.personality = {
+        index: personalityIndex,
+        startTime: Date.now(),
+    };
+    client.setDisplayName(
+        `AsloBot (${config.app.ai.personalities[state.personality.index]?.personalityName})`,
+    );
+
+    return true;
+};
+
 export {
     fixUserData,
     getUserById,
@@ -105,4 +128,5 @@ export {
     getLevel,
     getUserName,
     getUserFromMention,
+    changePersonality,
 };