import type { ContactDTO, MessageIdDTO, SerializedId } from "@shared/dto";

export { cn } from "cn";

export function getId(id?: string | SerializedId | MessageIdDTO | null) {
  if (!id) return "";
  return typeof id === "string" ? id : (id._serialized ?? "");
}

export function getInitial(name?: string | null) {
  return (
    name
      ?.split(" ")
      .map((i) => i[0])
      .slice(0, 2)
      .join("") || ""
  );
}

export function getFormattedName(
  name: string | SerializedId | ContactDTO | null | undefined,
): string {
  if (!name) return "";
  return typeof name === "string"
    ? name
    : typeof name.formattedName === "string"
      ? name.formattedName
      : "user" in name
        ? name.user || ""
        : "";
}