import { Book } from "../types/Book";

const censorExceptFirstLast = (data: string) => {
  const regex = /(?<!^).(?!$)/g;
  return data.replace(regex, "*");
};

const censorContactInfo = (data: string) => {
  if (data.includes("@")) {
    const regex = /(\w{1})[\w.]+([\w.])+@([\w.]+\w)/;
    return data.replace(regex, "$1**$2@$3");
  } else {
    return censorExceptFirstLast(data);
  }
};

export const censorBookData = (books: Book[], isAdmin: boolean): Book[] =>
  isAdmin
    ? books
    : books.map((book) => ({
        ...book,
        checkoutBy: !book.checkoutBy
          ? book.checkoutBy
          : censorExceptFirstLast(book.checkoutBy),
        contact: !book.contact ? book.contact : censorContactInfo(book.contact),
      }));