from inspect import getcallargs

from decorator import decorator

from .schema import User

from ..validate import validate, vHash

from ..error import UserNotFound, InterfaceException

@dbdefer

@validate(kwd="apikey", func=vHash, minlength=15, maxlength=15)

def getuser(apikey, session):

    user = session.query(User).filter_by(apikey=apikey).first()

    if user is None:

        raise UserNotFound()

    else:

        return user

@decorator

def vUser(f,*args,**kargs):

    kp=getcallargs(f,*args,**kargs)

    try:

        apikey = kp["user"]

    except KeyError:

        raise InterfaceException() 

    def _gotResult(_user):

        kp["user"]=_user

        return f(**kp)

    d=getuser(apikey=apikey)

    return d.addCallback(_gotResult)