intelligence/phone_intel.py

from __future__ import annotations

from typing import List

from shield.models.evidence import Evidence


def collect_phone_evidence(phone: str | None) -> List[Evidence]:
    if not phone:
        return []
    digits = "".join(ch for ch in phone if ch.isdigit())
    if len(digits) < 10:
        return [Evidence(
            source="phone_intelligence",
            category="identity_risk",
            risk_score=35,
            weight=0.45,
            confidence=0.75,
            explanation="Phone number is too short to be a reliable identity signal",
        )]
    if len(set(digits[-7:])) <= 2:
        return [Evidence(
            source="phone_intelligence",
            category="identity_risk",
            risk_score=30,
            weight=0.35,
            confidence=0.68,
            explanation="Phone number has a synthetic-looking repeated digit pattern",
        )]
    return []