app/soc/logic/models/user.py
author Sverre Rabbelier <srabbelier@gmail.com>
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Partially reverted "Update the copyright notice for 2009." This partially reverts commit r1933. Only the files that were created in 2008 were reverted. Patch by: Sverre Rabbelier
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#!/usr/bin/python2.5
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#
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# Copyright 2008 the Melange authors.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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#   http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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"""User (Model) query functions.
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"""
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__authors__ = [
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  '"Sverre Rabbelier" <sverre@rabbelier.nl>',
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  ]
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from google.appengine.api import users
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from google.appengine.ext import db
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from soc.cache import sidebar
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from soc.logic.helper import notifications
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from soc.logic.models import base
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from soc.logic.models.site import logic as site_logic
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import soc.models.user
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class Logic(base.Logic):
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  """Logic methods for the User model.
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  """
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  def __init__(self):
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    """Defines the name, key_name and model for this entity.
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    """
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    super(Logic, self).__init__(soc.models.user.User,
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                        skip_properties=['former_accounts'])
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  def isFormerAccount(self, account):
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    """Returns true if account is a former account of some User.
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    """
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    # TODO(pawel.solyga): replace 1000 with solution that works for any
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    #   number of queries
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    users_with_former_accounts = soc.models.user.User.gql(
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        'WHERE former_accounts != :1', None).fetch(1000)
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    for former_account_user in users_with_former_accounts: 
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      for former_account in former_account_user.former_accounts:
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        if str(account) == str(former_account):
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          return True
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    return False
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  def getForCurrentAccount(self):
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    """Retrieves the user entity for the currently logged in account.
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    If there is no user logged in, or they have no valid associated User
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    entity, None is returned.
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    """
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    account = users.get_current_user()
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    if not account:
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      return None
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    user = self.getForFields({'account': account, 'status':'valid'}, 
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        unique=True)
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    return user
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  def agreesToSiteToS(self, entity):
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    """Returns indication of User's answer to the site-wide Terms of Service.
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    Args:
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      entity: User entity to check for agreement to site-wide ToS
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    Returns:
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      True: no site-wide ToS is currently in effect on the site
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      True: site-wide ToS is in effect *and* User agrees to it
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        (User explicitly answered "Yes")
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      False: site-wide ToS is in effect but User did not agree to it yet
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    """
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    if not site_logic.getToS(site_logic.getSingleton()):
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      # no site-wide ToS in effect, so let the User slide for now
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      return True
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    try:
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      agreed_on = entity.agreed_to_tos_on
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    except db.Error:
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      # return False indicating that answer is missing
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      return False
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    # user has not agreed yet
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    if not agreed_on:
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      return False
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    return True
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  def getKeyValuesFromEntity(self, entity):
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    """See base.Logic.getKeyValuesFromEntity.
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    """
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    return [entity.link_id]
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  def getSuffixValues(self, entity):
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    """See base.Logic.getSuffixValues.
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    """
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    return [entity.link_id]
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  def getKeyValuesFromFields(self, fields):
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    """See base.Logic.getKeyValuesFromFields.
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    """
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    return [fields['link_id']]
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  def getKeyFieldNames(self):
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    """See base.Logic.getKeyFieldNames.
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    """
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    return ['link_id']
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  def _updateField(self, entity, name, value):
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    """Special case logic for account.
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    When the account is changed, the former_accounts field should be appended
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    with the old account.
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    Also, if either is_developer or agrees_to_tos change, the user's
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    rights have changed, so we need to flush the sidebar.
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    Make sure once the user agreed ToS, the ToS fields can't be changed.
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    """
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    # iff the agreed_to_tos is True and we want to set it to False 
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    if (name == 'agreed_to_tos') and (not value) and entity.agreed_to_tos:
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      return False
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    # iff the agreed_to_tos_on has a value and we want to change it
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    if (name == 'agreed_to_tos_on') and entity.agreed_to_tos_on and (
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        value != entity.agreed_to_tos_on):
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      return False
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    if (name == 'is_developer') and (entity.is_developer != value):
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      sidebar.flush(entity.account)
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    if (name == 'agreed_to_tos') and (entity.agreed_to_tos != value):
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      sidebar.flush(entity.account)
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    if (name == 'account') and (str(entity.account) != str(value)):
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      entity.former_accounts.append(entity.account)
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    return True
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  def _onCreate(self, entity):
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    """Send out a message to welcome the new user.
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    """
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    notifications.sendWelcomeMessage(entity)
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    super(Logic, self)._onCreate(entity)
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logic = Logic()