def file_in_dict():
    '''
    returns dictionary of users
    :return:
    '''
    with open('reg_user.txt', 'w') as file:
        lst_users = file.readlines()
        all_users = dict()
        for i in lst_users:
            i = i.strip()
            i.split(',')
            all_users[i[0]] = (i[1], i[2])
        return all_users


def is_registered(username):
    '''
    checks if user registered
    :param username:
    :return:
    '''
    all_users = auth.file_dict()
    if username in all_users:
        return True
    else:
        return False

def authen(username, password):
    '''
    authentication
    :param username:
    :param password:
    :return:
    '''
    all_users = file_in_dict()
    if username in all_users:
        if all_users[username][0] == password:
            return username
        else:
            return 'Password is incorrect'
    else:
        return 'Username is not registered'

def author(username):
    '''
    authorization
    :param username:
    :return:
    '''
    all_users = file_in_dict()
    if all_users[username][0] == 'op':
        return 'op'
    elif all_users[username][0] == 'basic':
        return 'basic'