gammatools/app/functions/get_attack_roll_outcome.py

from app.functions.roll_dices import roll_dices


def get_attack_roll_outcome(result, modifier=0):
    if modifier is None:
        modifier = 0
    outcome = 'Unknown'
    raw_roll = roll_dices(1, 20, False).get('result')
    needed = result['needed']

    if modifier != 0:
        result["original-roll"] = raw_roll
        result["modifier"] = modifier
        rolled = raw_roll + modifier  # negative modifiers will subtract themselves naturally
        result["adjusted-roll"] = rolled
    else:
        rolled = raw_roll
        result["original-roll"] = rolled

    if (rolled >= 20) and (needed <= 16):
        outcome = "Devastating Success!"
    elif needed <= rolled:
        outcome = "Attack Successful!"
    elif needed > rolled:
        outcome = "Attack Failed!"

    result['outcome'] = outcome
    return result