Initial code

src/modules/user/index.ts

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+export * from "./user.js";

src/modules/user/user.ts

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+import { MatrixClient } from "matrix-js-sdk";
+import type { ICallbackStore } from "../types.js";
+import { config } from "../../config.js";
+import { getRank, getUserById, getUserName } from "../../helpers.js";
+import { state } from "../../store/store.js";
+import type { IUser } from "../../store/types.js";
+let client: MatrixClient;
+
+const registerModuleUser = (
+    matrixClient: MatrixClient,
+    callbackStore: ICallbackStore,
+) => {
+    client = matrixClient;
+
+    callbackStore.messageCallbacks.push({
+        startCondition: `${config.app.triggerPrefix}rank`,
+        callbackFunc: onRank,
+    });
+    callbackStore.messageCallbacks.push({
+        startCondition: `${config.app.triggerPrefix}leaderboard`,
+        callbackFunc: onLeaderboard,
+    });
+};
+
+const onRank = (_text: string, roomId: string, sender: string) => {
+    const rank = getRank(getUserById(sender).experience);
+
+    client.sendHtmlMessage(
+        roomId,
+        "",
+        `<h3>Your Rank: ${rank.rank}</h3>
+        <i>Next rank progress: ${rank.experienceInRank}/${rank.expToNextRank}exp</i>`,
+    );
+};
+
+const onLeaderboard = (_text: string, roomId: string) => {
+    const mapUsersToLeaderboard = (user: IUser): string => {
+        const rank = getRank(user.experience);
+
+        return `<li>${getUserName(user)}: rank ${rank.rank} (${rank.experienceInRank}/${rank.expToNextRank}exp)</li>`;
+    };
+
+    const users = state.users.sort(
+        (userA, userB) => userB.experience - userA.experience,
+    );
+
+    client.sendHtmlMessage(
+        roomId,
+        "",
+        `<h3>Leaderboard</h3>
+        <ul>
+            ${users.map(mapUsersToLeaderboard)}
+        </ul>`,
+    );
+};
+
+export { registerModuleUser };