first commit

frontend/app/utils/function/nameMapping/index.tsx

@@ -0,0 +1,34 @@
+
+import { getUsersApi } from "../../api/projectApi";
+import { User } from "../../api/projectManager/projectManager";
+
+let userCache: Record<string, string> | null = null;
+
+export async function buildUserMap(): Promise<Record<string, string>> {
+  if (userCache) return userCache; 
+
+  const users = await getUsersApi(); 
+
+  const map: Record<string, string> = {};
+
+  users.forEach((user: User) => {
+    map[user.userId] = user.userName;
+  });
+
+  userCache = map;
+  return map;
+}
+
+export async function getUserNameById(userId: string): Promise<string> {
+  if (!userId) return "—";
+
+  const map = await buildUserMap();
+  return map[userId] || "Unknown User";
+}
+
+
+export async function getUserNamesByIds(ids: string[]): Promise<string[]> {
+  const map = await buildUserMap();
+  return ids.map(id => map[id] || "Unknown User");
+}
+

frontend/app/utils/function/projectDuration/index.tsx

@@ -0,0 +1,16 @@
+export function calculateDurationInDays(
+  startDate?: string | Date,
+  endDate?: string | Date
+): number | null {
+  if (!startDate || !endDate) return null;
+
+  const start = new Date(startDate);
+  const end = new Date(endDate);
+
+  if (isNaN(start.getTime()) || isNaN(end.getTime())) return null;
+
+  const diffTime = end.getTime() - start.getTime();
+  const diffDays = Math.ceil(diffTime / (1000 * 60 * 60 * 24));
+
+  return diffDays >= 0 ? diffDays : null;
+}