from __future__ import annotations

import re

DIGIT_TABLE = str.maketrans("۰۱۲۳۴۵۶۷۸۹٠١٢٣٤٥٦٧٨٩", "01234567890123456789")
ZWNJ = "\u200c"
NBSP = "\u00a0"
HALF_SPACE_RE = re.compile(r"[\u200c\u200b\u00a0]")


def fold_digits(text: str) -> str:
    return (text or "").translate(DIGIT_TABLE)


def squeeze_spaces(text: str) -> str:
    return HALF_SPACE_RE.sub(" ", text or "")


def compact(text: str) -> str:
    return fold_digits(squeeze_spaces(text or ""))


def only_digits(text: str) -> str:
    return "".join(ch for ch in fold_digits(text or "") if ch.isdigit())


def strip_iban(text: str) -> str:
    return re.sub(r"[\s\-]", "", fold_digits(text or "")).upper()