Airtable: Make Code

code.js

const ic = input.config();

const unique_sequential_id = ({
  hexaduadec_digits_of_randomness_to_add = 2, 
  additional_sequence = "",
  seed = Date.now() - 1635743663677
} = {}) => {
    const digits = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ".split("");

    const calculate_hexaduadecimal = (base10_number, hexaduadecimal = "") => {
        let modulo = base10_number % digits.length;
        let multiples = Math.floor(base10_number / digits.length);

        if (multiples > 0) {
            const tail_digit = `${digits[modulo]}${hexaduadecimal}`;
            let preceding;
            if (multiples >= digits.length) {
                return calculate_hexaduadecimal(multiples, tail_digit);
            } else {
                preceding = digits[multiples];
            }
            hexaduadecimal = `${preceding}${tail_digit}`;
        } else { hexaduadecimal = digits[modulo]; }

        return hexaduadecimal;
    }

    // Get a random hexaduadec number of the specified length 
    // between (e.g. length = 2) 0 and ZZ
    let randomness_to_add;
    if (hexaduadec_digits_of_randomness_to_add > 0) {
      const highest_n_digit_number = digits.length ** hexaduadec_digits_of_randomness_to_add - 1;
      const lowest_number = 0;
      const rand = ((max, min) => {
          return Math.floor(Math.random() * (max - min) + min)
      })(highest_n_digit_number, lowest_number);
      randomness_to_add = calculate_hexaduadecimal(rand).padStart(hexaduadec_digits_of_randomness_to_add, "0");
    }
    else {
      randomness_to_add = "";
    }

    return `${calculate_hexaduadecimal(seed)}${randomness_to_add}${additional_sequence}`;
}

let table = base.getTable("Links");
let record = await table.selectRecordAsync(ic.recordID);
let recordCode = record.getCellValue("Code");

const code = recordCode || unique_sequential_id({
  hexaduadec_digits_of_randomness_to_add: 0,
  seed: ic.id
});

output.set("code", code);