overload

export interface User {
  id: string;
  name: string;
  role: "admin" | "member";
  tags: string[];
}

/**
 * Fetch user data by ID
 * @param id
 * @returns User object or null if ID is invalid
 */
export async function fetchUser(id: string): Promise<User | null> {
  if (!id) {
    return null;
  }

  const response = await fetch(`/api/users/${id}`, {
    method: "GET",
    headers: { Accept: "application/json" },
  });

  if (!response.ok) {
    throw new Error(`HTTP ${response.status}`);
  }

  return (await response.json()) as User;
}

function greet(user: User): string {
  // Simple greeting function that uses the user's name
  return `Hello, ${user.name}!`;
}