fix: Username

src/utils/getUsername.ts

@@ -1,13 +1,45 @@
-import { Client, Snowflake } from "discord.js";
-
-export async function getUsername(client: Client, guildId: Snowflake, memberId: Snowflake) {
-    let guild = client.guilds.cache.get(guildId);
-    if (!guild) guild = await client.guilds.fetch(guildId);
-    let member = guild.members.cache.get(memberId);
-    if (!member) member = await guild.members.fetch(memberId);
-    if (member) return member.displayName;
-    let user = client.users.cache.get(memberId);
-    if (!user) user = await client.users.fetch(memberId);
-    if (!user) return "<Unknown player>";
-    return user.displayName;
+import { Client, DiscordAPIError, Guild, GuildMember, Snowflake, } from "discord.js";
+
+const nonExistentMemberCache = new Map<Snowflake, boolean>();
+const CACHE_DURATION = 30000; // 30 seconds
+
+export async function getUsername(client: Client, guildId: Snowflake, memberId: Snowflake): Promise<string> {
+    try {
+        // Fetch guild
+        const guild = client.guilds.cache.get(guildId) || await client.guilds.fetch(guildId);
+
+        // Check if member is cached as non-existent
+        if (nonExistentMemberCache.has(memberId)) {
+            return await fetchUserDisplayName(client, memberId);
+        }
+
+        // Attempt to fetch member
+        try {
+            const member = await fetchMember(guild, memberId);
+            return member.displayName;
+        } catch (memberError) {
+            if ((memberError as DiscordAPIError).code === 10007) { // Unknown member error
+                nonExistentMemberCache.set(memberId, true);
+                setTimeout(() => nonExistentMemberCache.delete(memberId), CACHE_DURATION);
+            }
+            return await fetchUserDisplayName(client, memberId);
+        }
+    } catch (error) {
+        console.error("Error in getUsername:", error);
+        return "<Unknown player>";
+    }
+}
+
+async function fetchMember(guild: Guild, memberId: Snowflake): Promise<GuildMember> {
+    return guild.members.cache.get(memberId) || await guild.members.fetch(memberId);
+}
+
+async function fetchUserDisplayName(client: Client, userId: Snowflake): Promise<string> {
+    try {
+        const user = client.users.cache.get(userId) || await client.users.fetch(userId);
+        return user.displayName;
+    } catch (error) {
+        console.error("Error fetching user:", error);
+        return "<Unknown player>";
+    }
 }