tests/profile_utils.py

# Copyright 2010 the Melange authors.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#   http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

"""Utils for manipulating profile data."""

import datetime
import json
import os

from oauth2client import appengine
from oauth2client import client

from google.appengine.api import users

from datetime import timedelta


DEFAULT_EMAIL = 'test@example.com'

DEFAULT_MAX_AGE = 100
DEFAULT_MIN_AGE = 0

def generateEligibleStudentBirthDate(program):
  min_age = program.student_min_age or DEFAULT_MIN_AGE
  max_age = program.student_max_age or DEFAULT_MAX_AGE
  eligible_age = (min_age + max_age) / 2
  return datetime.datetime.date(
      datetime.datetime.today() - timedelta(days=eligible_age * 365))


def generateIneligibleStudentBirthDate(program):
  if program.student_min_age:
    days = (program.student_min_age - 1) * 365
    return datetime.datetime.date(
        datetime.datetime.today() - timedelta(days=days))
  elif program.student_max_age:
    days = (program.student_max_age + 1) * 365
    return datetime.datetime.date(
        datetime.datetime.today() - timedelta(days=days))
  else:
    raise ValueError('Neither min age nor max age is defined for the program.')


# TODO(daniel): Change name to login and remove the function above
def loginNDB(user, is_admin=False):
  """Logs in the specified user by setting 'USER_ID' environmental variables.

  Args:
    user: user entity.
    is_admin: A bool specifying whether the user is an administrator
      of the application or not.
  """
  os.environ['USER_ID'] = user.account_id
  os.environ['USER_IS_ADMIN'] = '1' if is_admin else '0'


class FakeCredentials(client.Credentials):
  """Minimal implementation of the Credentials class.

  When stored in the datastore as the credentials property on a
  appengine.CredentialsModel entity, the oauth2client library will consider
  the user to be logged in.
  """

  def __init__(self, invalid, access_token, client_id):
    self.invalid = invalid
    self.access_token = access_token
    self.client_id = client_id

  def authorize(self, http):
    pass

  @classmethod
  def from_json(cls, s):
    data = json.loads(s)
    invalid = data['invalid']
    access_token = data['access_token']
    client_id = data['client_id']
    return FakeCredentials(invalid, access_token, client_id)


def oauthAuthorizeNDB(valid=True, access_token=None, client_id=None):
  """Creates oauth credentials for the currently logged in user.
  """
  user = users.get_current_user()
  credentials = FakeCredentials(
      invalid=not valid, access_token=access_token, client_id=client_id)
  credentials_model = appengine.CredentialsModel.get_or_insert(user.user_id())
  credentials_model.credentials = credentials
  credentials_model.put()


def logout():
  """Logs out the current user by clearing the 'USER_EMAIL'
  and 'USER_ID' environment variables.
  """
  del os.environ['USER_EMAIL']
  del os.environ['USER_ID']


def signInToGoogleAccount(email, user_id=None):
  """Signs in an email address for the account that is logged in by setting
  'USER_EMAIL' and 'USER_ID' environmental variables.

  The Google account associated with the specified email will be considered
  currently logged in, after this function terminates.

  Args:
    email: the user email as a string, e.g.: 'test@example.com'
    user_id: the user id as a string
  """
  os.environ['USER_EMAIL'] = email
  os.environ['USER_ID'] = user_id or ''