chezbetty.models.User

Complexity

Total Complexity

31

Size/Duplication

Total Lines	161
Duplicated Lines	0 %

21 Methods

Rating	Name	Duplication	Size	Complexity
A	get_user_count_cumulative()	0	6	1
A	__str__()	0	3	1
A	password()	0	9	1
A	__init__()	0	6	1
A	get_admins()	0	5	1
A	has_password()	0	3	1
A	from_umid()	0	11	3
A	get_amount_owed()	0	5	1
A	all()	0	5	1
A	get_shame_users()	0	6	1
A	deposit_limit()	0	6	3
A	from_uniqname()	0	7	3
A	get_users_total()	0	4	1
A	random_password()	0	6	2
A	check_password()	0	6	2
A	get_details()	0	2	1
A	from_fuzzy()	0	7	1
A	from_id()	0	3	1
A	__make_salt()	0	2	1
A	count()	0	4	1
A	get_amount_held()	0	5	1

from pyramid.security import authenticated_userid
import hashlib
import binascii
import os
from .model import *
from . import account
from . import event
from chezbetty import utility

import ldap3
import random
import string

class InvalidUserException(Exception):
    pass


class LDAPLookup(object):
    """class that allows lookup of an individual in the UM directory
    based on Michigan ID number, uniqname, MCARD"""

    SERVER = None
    USERNAME = None
    BASE_DN = "ou=People,dc=umich,dc=edu"
    PASSWORD = None
    ATTRIBUTES = ["uid", "entityid", "displayName"]
    # http://www.itcs.umich.edu/itcsdocs/r1463/attributes-for-ldap.html
    DETAILS_ATTRIBUTES = [
            # Could be interesting but require extra perm's from ITS
            #"umichInstRoles",
            #"umichAlumStatus",
            #"umichAAAcadProgram",
            #"umichAATermStatus",
            #"umichHR",
            "notice",
            "ou",
            "umichDescription",
            "umichTitle",
            ]

    def __init__(self):
        self.__conn = None

    def __connect(self):
        if not self.__conn:
            s = ldap3.Server(self.SERVER, port=636, use_ssl=True, get_info=ldap3.GET_ALL_INFO)
            self.__conn = ldap3.Connection(s, auto_bind=True,
                    user=self.USERNAME, password=self.PASSWORD,
                    client_strategy=ldap3.STRATEGY_SYNC,
                    authentication=ldap3.AUTH_SIMPLE
            )


    def __do_lookup(self, k, v, attributes, full_dict=False):
        self.__connect()
        query = "(%s=%s)" % (k, v)
        try:
            self.__conn.search(self.BASE_DN,
                    query,
                    ldap3.SEARCH_SCOPE_WHOLE_SUBTREE,
                    attributes=attributes
            )
        except:
            # sometimes our connections time out
            self.__conn = None
            self.__connect()
            self.__conn.search(self.BASE_DN,
                    query,
                    ldap3.SEARCH_SCOPE_WHOLE_SUBTREE,
                    attributes=attributes
            )

        if len(self.__conn.response) == 0:
            raise InvalidUserException()

        if full_dict:
            return self.__conn.response[0]["attributes"]

        return {
            "umid":self.__conn.response[0]["attributes"]["entityid"],
            "uniqname":self.__conn.response[0]["attributes"]["uid"][0],
            "name":self.__conn.response[0]["attributes"]["displayName"][0]
        }

    def __lookup(self, k, v):
        return self.__do_lookup(k, v, self.ATTRIBUTES)

    def __detail_lookup(self, k, v):
        return self.__do_lookup(k, v,
                self.ATTRIBUTES + self.DETAILS_ATTRIBUTES,
                full_dict=True,
                )

    def lookup_umid(self, umid, details=False):
        if details:
            return self.__detail_lookup("entityid", umid)
        else:
            return self.__lookup("entityid", umid)

    def lookup_uniqname(self, uniqname, details=False):
        if details:
            return self.__detail_lookup("uid", uniqname)
        else:
            return self.__lookup("uid", uniqname)


class User(account.Account):
    __tablename__ = 'users'
    __mapper_args__ = {'polymorphic_identity': 'user'}

    id        = Column(Integer, ForeignKey("accounts.id"), primary_key=True)
    uniqname  = Column(String(8), nullable=False, unique=True)
    umid      = Column(String(8), unique=True)
    _password = Column("password", String(255))
    _salt     = Column("salt", String(255))
    enabled   = Column(Boolean, nullable=False, default=True)
    role      = Column(Enum("user", "serviceaccount", "manager", "administrator", name="user_type"),
                       nullable=False, default="user")

    administrative_events = relationship(event.Event, foreign_keys=[event.Event.user_id], backref="admin")
    events_deleted        = relationship(event.Event, foreign_keys=[event.Event.deleted_user_id], backref="deleted_user")
    __ldap = LDAPLookup()

    def __init__(self, uniqname, umid, name):
        self.enabled = True
        self.uniqname = uniqname
        self.umid = umid
        self.name = name
        self.balance = 0.0

    def __str__(self):
        return "<User: id {}, uniqname {}, umid {}, name {}, balance {}>".\
                format(self.id, self.uniqname, self.umid, self.name, self.balance)

    @classmethod
    def from_id(cls, id):
        return DBSession.query(cls).filter(cls.id == id).one()

    def get_details(self):
        return self.__ldap.lookup_uniqname(self.uniqname, details=True)

    @classmethod
    def from_uniqname(cls, uniqname, local_only=False):
        u = DBSession.query(cls).filter(cls.uniqname == uniqname).first()
        if not u and not local_only:
            u = cls(**cls.__ldap.lookup_uniqname(uniqname))
            DBSession.add(u)
        return u

    @classmethod
    def from_umid(cls, umid, create_if_never_seen=False):
        u = DBSession.query(cls).filter(cls.umid == umid).first()
        if not u:
            if create_if_never_seen:
                u = cls(**cls.__ldap.lookup_umid(umid))
                DBSession.add(u)
                utility.new_user_email(u)
            else:
                raise InvalidUserException()
        return u

    @classmethod
    def from_fuzzy(cls, search_str):
        return DBSession.query(cls)\
                        .filter(or_(
                            cls.uniqname.ilike('%{}%'.format(search_str)),
                            cls.umid.ilike('%{}%'.format(search_str)),
                            cls.name.ilike('%{}%'.format(search_str))
                        )).all()

    @classmethod
    def all(cls):
        return DBSession.query(cls)\
                        .filter(cls.enabled)\
                        .order_by(cls.name)\
                        .all()

    @classmethod
    def count(cls):
        return DBSession.query(func.count(cls.id).label('c'))\
                        .filter(cls.role != 'serviceaccount')\
                        .one().c

    @classmethod
    def get_admins(cls):
        return DBSession.query(cls)\
                        .filter(cls.enabled)\
                        .filter(cls.role=='administrator').all()

    @classmethod
    def get_shame_users(cls):
        return DBSession.query(cls)\
                        .filter(cls.enabled)\
                        .filter(cls.balance < -5)\
                        .order_by(cls.balance).all()

    @classmethod
    def get_users_total(cls):
        return DBSession.query(func.sum(User.balance).label("total_balance"))\
                        .one().total_balance or Decimal(0.0)

    # Sum the total amount of money in user accounts that we are holding for
    # users. This is different from just getting the total because it doesn't
    # count users with negative balances
    @classmethod
    def get_amount_held(cls):
        return DBSession.query(func.sum(User.balance).label("total_balance"))\
                        .filter(User.balance>0)\
                        .one().total_balance or Decimal(0.0)

    @classmethod
    def get_amount_owed(cls):
        return DBSession.query(func.sum(User.balance).label("total_balance"))\
                        .filter(User.balance<0)\
                        .one().total_balance or Decimal(0.0)

    @classmethod
    def get_user_count_cumulative(cls):
        rows = DBSession.query(cls.created_at)\
                        .order_by(cls.created_at)\
                        .all()
        return utility.timeseries_cumulative(rows)

    def __make_salt(self):
        return binascii.b2a_base64(open("/dev/urandom", "rb").read(32))[:-3].decode("ascii")

    @hybrid_property
    def password(self):
        return self._password

    @password.setter
    def password(self, password):
        if password == '':
            # Use this to clear the password so the user can't login
            self._password = None
        else:
            self._salt = self.__make_salt()
            salted = (self._salt + password).encode('utf-8')
            self._password = hashlib.sha256(salted).hexdigest()

    def random_password(self):
        password = ''.join(random.choice(string.ascii_letters + string.digits) for x in range(6))
        self._salt = self.__make_salt()
        salted = (self._salt + password).encode('utf-8')
        self._password = hashlib.sha256(salted).hexdigest()
        return password

    def check_password(self, cand):
        if not self._salt:
            return False
        salted = (self._salt + cand).encode('utf-8')
        c = hashlib.sha256(salted).hexdigest()
        return c == self._password

    @property
    def has_password(self):
        return self._password != None

    # Cash deposit limit is a quick check on how active the user has been.
    # We basically don't want new users to play around with seeing how much
    # cash they can deposit.
    @property
    def deposit_limit(self):
        if self.total_deposits > 10.0 and self.total_purchases > 10.0:
            return 100.0
        else:
            return 20.0


def get_user(request):
    login = authenticated_userid(request)
    if not login:
        return None
    return DBSession.query(User).filter(User.uniqname == login).one()


# This is in a stupid place due to circular input problems
@property
def __user_from_foreign_key(self):
    return User.from_id(self.user_id)
event.Event.user = __user_from_foreign_key


def groupfinder(userid, request):
    user = User.from_uniqname(userid)
    if user.role == "user":
        return ["user",]
    elif user.role == "manager":
        return ["user","manager"]
    elif user.role == "administrator":
        return ["user","manager","admin","serviceaccount"]
    elif user.role == "serviceaccount":
        return ["serviceaccount"]