Knub 30 conversion base work; Work on Utility plugin Knub 30 conversion

backend/src/plugins/Utility/refreshMembers.ts

@@ -0,0 +1,20 @@
+import { Guild } from "eris";
+import { MINUTES, noop } from "../../utils";
+
+const MEMBER_REFRESH_FREQUENCY = 10 * MINUTES; // How often to do a full member refresh when using commands that need it
+const memberRefreshLog = new Map<string, { time: number, promise: Promise<void> }>();
+
+export async function refreshMembersIfNeeded(guild: Guild) {
+  const lastRefresh = memberRefreshLog.get(guild.id);
+  if (lastRefresh && Date.now() < lastRefresh.time + MEMBER_REFRESH_FREQUENCY) {
+    return lastRefresh.promise;
+  }
+
+  const loadPromise = guild.fetchAllMembers().then(noop);
+  memberRefreshLog.set(guild.id, {
+    time: Date.now(),
+    promise: loadPromise,
+  });
+
+  return loadPromise;
+}