from kivy.uix.boxlayout import BoxLayout

class MasterControl(BoxLayout):
    def __init__(self, **kwargs):
        super(MasterControl, self).__init__(**kwargs)
        m_currentUser = None

    def loginUser(self, emp):
        self.m_currentUser = emp
        print "I made it to login!"
        # remove login widget, add the rest of the UI according to the security level of the use

from kivy.uix.anchorlayout import AnchorLayout
from kivy.uix.label import Label
from kivy.uix.button import Button
from kivy.uix.textinput import TextInput
from kivy.uix.boxlayout import BoxLayout

from coreAPI.mastercontrol import MasterControl
from employee import Employee, getEmployees

class LoginWidget(AnchorLayout):
    def __init__(self, **kwargs):
        super(LoginWidget, self).__init__(**kwargs)

        def loginBtnHandle(instance):
            empList = getEmployees()
            for emp in empList:
                if emp.m_aNum == uNameInput.text:
                    if emp.authenticate(pWordInput.text):
                        self.parent.loginUser(emp) # Here is where I get  AttributeError: 'MasterControl' object has no attribute 'loginUser'

        box = BoxLayout(orientation = 'vertical', size = (300, 110), size_hint = (None, None), spacing = 10)

        uNameInput = TextInput(hint_text = 'Username',
                multiline = False,
                size = (300, 30),
                size_hint = (None, None),
                cursor_color = [0,0,0,1],
                write_tab = False)

        pWordInput = TextInput(hint_text = 'Password',
                multiline = False,
                size = (300, 30),
                size_hint = (None, None),
                cursor_color = [0,0,0,1],
                password = True,
                write_tab = False)

        loginBtn = Button(text = 'Login', size = (300, 50), size_hint = (None, None))
        loginBtn.bind(on_press = loginBtnHandle)
        loginBtn.bind(on_enter = loginBtnHandle)

        box.add_widget(uNameInput)
        box.add_widget(pWordInput)
        box.add_widget(loginBtn)

        self.add_widget(box)

from passlib.hash import pbkdf2_sha256
import pickle
import os

class Employee():
    def __init__(self, name, aNumber, password, clearance):
        self.m_name = name
        self.m_aNum = aNumber
        self.m_pWordHash = pbkdf2_sha256.hash(password) # Only store the password hash.  NEVER the password text
        self.m_clearance = clearance

    def authenticate(self, attempt):
        return pbkdf2_sha256.verify(attempt, self.m_pWordHash)

    def serialize(self):
        filename = 'users/' + self.m_aNum + '.emp'
        frozen = pickle.dumps(self)
        f = open(filename, 'w')
        f.write(frozen)
        f.close()
        return frozen

def getEmployees():
    empList = []
    path = 'users/'
    for filename in os.listdir(path):
        f = open(path + filename, 'r')
        contents = f.read()
        empList.append(pickle.loads(contents))
    return empList

tempEmp = Employee('Tester', 'A12345678', 'password', 'HIGH')
tempEmp.serialize()