from core.models.Result import Result, ResultError

from typing import Optional

def confirm_prereqs(PRE_REQS: list, allow_false: Optional[bool] = False) -> Result:
    for each_prereq in PRE_REQS:
        if allow_false:
            if each_prereq == None:
                return Result(valid=False, error_type=ResultError.INVALID_INPUT, message=f"You are missing {each_prereq}")
        else:
            if not each_prereq:
                return Result(valid=False, error_type=ResultError.INVALID_INPUT, message=f"You are missing {each_prereq}")
    return Result(valid=True)