a fun bot for the hc slack
dunkirk.sh
1export async function fetchUserData(userId: string) {
2 const res = await fetch(`https://cachet.dunkirk.sh/users/${userId}/`);
3 const json = await res.json();
4
5 return {
6 id: json.id,
7 expiration: json.expiration,
8 user: json.user,
9 displayName: json.displayName,
10 image: json.image,
11 };
12}
13
14export const userService = {
15 cache: {} as Record<string, { name: string; timestamp: number }>,
16 pendingRequests: {} as Record<string, Promise<string>>,
17 CACHE_TTL: 5 * 60 * 1000,
18
19 async getUserName(userId: string): Promise<string> {
20 const now = Date.now();
21
22 // Check if user data is in cache and still valid
23 if (
24 this.cache[userId] &&
25 now - this.cache[userId].timestamp < this.CACHE_TTL
26 ) {
27 return this.cache[userId].name;
28 }
29
30 // If there's already a pending request for this user, return that promise
31 // instead of creating a new request
32 if (this.pendingRequests[userId]) {
33 return this.pendingRequests[userId];
34 }
35
36 // Create a new promise for this user and store it
37 const fetchPromise = (async () => {
38 try {
39 const userData = await fetchUserData(userId);
40 const userName = userData?.displayName || "Unknown User";
41
42 this.cache[userId] = {
43 name: userName,
44 timestamp: now,
45 };
46
47 return userName;
48 } catch (error) {
49 console.error("Error fetching user data:", error);
50 return "Unknown User";
51 } finally {
52 // Clean up the pending request when done
53 delete this.pendingRequests[userId];
54 }
55 })();
56
57 // Store the promise
58 this.pendingRequests[userId] = fetchPromise;
59
60 // Return the promise
61 return fetchPromise;
62 },
63};