utils/phone.py

import re

def extract_phone(text: str) -> str | None:
    if not text:
        return None
    m = re.search(r"(\+?\d[\d\-\s]{8,}\d)", text)
    return m.group(1).replace(" ", "") if m else None

def looks_valid(phone: str | None) -> bool:
    if not phone: return False
    digits = "".join(ch for ch in phone if ch.isdigit())
    return len(digits) >= 10