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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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−
+
−"""Helper functions for sending out notifications.
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−"""
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−
+
−__authors__ = [
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−  '"Lennard de Rijk" <ljvderijk@gmail.com>',
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−  ]
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−
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−
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−import os
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−import time
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−
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−from google.appengine.api import users
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−
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−from django.template import loader
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−from django.utils.encoding import force_unicode
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−from django.utils.translation import ugettext_lazy
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−
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−# We cannot import soc.logic.models notification nor user here
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−# due to cyclic imports
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−from soc.logic import dicts
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−from soc.logic import mail_dispatcher
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−from soc.views.helper import redirects
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−
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−import soc.views.models as model_view
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−import soc.logic.models as model_logic
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−
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−
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−DEF_NEW_NOTIFICATION_MSG = ugettext_lazy(
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−  "You have received a new Notification.")
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−
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−DEF_INVITATION_MSG_FMT = ugettext_lazy(
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−    "Invitation to become a %(role)s for %(group)s.")
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−
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−DEF_NEW_CLUB_MSG_FMT = ugettext_lazy(
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−    "Your club application for %(name)s has been accepted.")
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−
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−DEF_WELCOME_MSG_FMT = ugettext_lazy("Welcome to Melange %(name)s,")
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−
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−DEF_GROUP_INVITE_NOTIFICATION_TEMPLATE = 'soc/notification/messages/invitation.html'
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−
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−DEF_NEW_CLUB_TEMPLATE = 'soc/club/messages/accepted.html'
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−
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−
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−def sendInviteNotification(entity):
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−  """Sends out an invite notification to the user the request is for.
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−
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−  Args:
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−    entity : A request containing the information needed to create the message
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−  """
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−
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−  # get the user the request is for
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−  properties = {'link_id': entity.link_id }
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−  to_user = model_logic.user.logic.getForFields(properties, unique=True)
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−
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−  invitation_url = "http://%(host)s%(index)s" % {
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−      'host' : os.environ['HTTP_HOST'],
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−      'index': redirects.inviteAcceptedRedirect(entity, None),
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−      }
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−
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−  message_properties = {
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−      'role': entity.role,
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−      'group': entity.scope.name,
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−      'invitation_url': invitation_url,
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−      }
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−
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−  subject = DEF_INVITATION_MSG_FMT % {
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−      'role' : entity.role,
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−      'group' : entity.scope.name
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−      }
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−
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−  template = DEF_GROUP_INVITE_NOTIFICATION_TEMPLATE
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−
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−  sendNotification(to_user, message_properties, subject, template)
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−
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−
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−def sendNewClubNotification(entity):
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−  """Sends out an invite notification to the applicant of the club.
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−
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−  Args:
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−    entity : An accepted club application
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−  """
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−
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−  to_user = entity.applicant
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−
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−  url = "http://%(host)s/club/applicant/%(key_name)s" % {
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−      'host' : os.environ['HTTP_HOST'],
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−      'key_name': entity.key().name(),
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−      }
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−
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−  message_properties = {
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−      'club_name': entity.name,
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−      'url': url,
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−      }
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−
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−  subject = DEF_NEW_CLUB_MSG_FMT % {
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−      'name': entity.name,
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−      }
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−
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−  template = DEF_NEW_CLUB_TEMPLATE
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−
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−  sendNotification(to_user, message_properties, subject, template)
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−
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−
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−def sendNotification(to_user, message_properties, subject, template):
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−  """Sends out an notification to the specified user.
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−
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−  Args:
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−    to_user : user to which the notification will be send
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−    message_properties : email message properties
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−    subject : subject of notification email
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−    template : template used for generating notification
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−  """
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−
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−  from_user = model_logic.user.logic.getForCurrentAccount()
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−
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−  new_message_properties = {
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−      'sender_name': from_user.name,
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−      'to_name': to_user.name,
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−      }
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−
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−  message_properties = dicts.merge(message_properties, new_message_properties)
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−
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−  message = loader.render_to_string(template, dictionary=message_properties)
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−
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−  fields = {
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−      'from_user' : from_user,
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−      'subject': subject,
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−      'message' : message,
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−      'scope' : to_user,
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−      'link_id' :'%i' % (time.time()),
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−      'scope_path' : to_user.link_id
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−  }
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−
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−  key_fields = model_logic.notification.logic.getKeyFieldsFromDict(fields)
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−
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−  # create and put a new notification in the datastore
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−  model_logic.notification.logic.updateOrCreateFromFields(fields, key_fields)
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−
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−
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−def sendNewNotificationMessage(notification_entity):
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−  """Sends an email to a user about a new notification.
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−
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−    Args:
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−      notification_entity: Notification about which the message should be sent
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−  """
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−
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−  # get user logic
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−  user_logic = model_logic.user
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−
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−  # get the current user
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−  current_user_entity = user_logic.logic.getForCurrentAccount()
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−
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−  # create the url to show this notification
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−  notification_url = "http://%(host)s%(index)s" % {
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−      'host' : os.environ['HTTP_HOST'],
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−      'index': redirects.getPublicRedirect(notification_entity,
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−          model_view.notification.view.getParams())}
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−
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−
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−  # TODO(Lennard): Change the sender to the no-reply address
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−
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−  # create the message contents
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−  messageProperties = {
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−      'to_name': notification_entity.scope.name,
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−      'sender_name': current_user_entity.name,
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−      'to': notification_entity.scope.account.email(),
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−      'sender': current_user_entity.account.email(),
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−      'subject': force_unicode(DEF_NEW_NOTIFICATION_MSG),
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−      'notification' : notification_entity,
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−      'notification_url' : notification_url
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−      }
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−
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−  # send out the message using the default new notification template
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−  mail_dispatcher.sendMailFromTemplate('soc/mail/new_notification.html',
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−                                       messageProperties)
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−
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−
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−def sendWelcomeMessage(user_entity):
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−  """Sends out a welcome message to a user.
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−
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−    Args:
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−      user_entity: User entity which the message should be send to
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−  """
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−
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−  # get user logic
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−  user_logic = model_logic.user
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−
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−  # get the current user
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−  current_user_entity = user_logic.logic.getForCurrentAccount()
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−
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−  # TODO(Lennard): change the message sender to some sort of no-reply adress
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−  # that is probably a setting in sitesettings. (adress must be a developer).
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−  # This is due to a GAE limitation that allows only devs or the current user
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−  # to send an email. Currently this results in a user receiving the same
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−  # email twice.
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−
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−  # create the message contents
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−  messageProperties = {
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−      'to_name': user_entity.name,
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−      'sender_name': current_user_entity.name,
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−      'to': user_entity.account.email(),
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−      'sender': current_user_entity.account.email(),
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−      'subject': DEF_WELCOME_MSG_FMT % {
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−          'name': user_entity.name
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−          }
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−      }
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−
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−  # send out the message using the default welcome template
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−  mail_dispatcher.sendMailFromTemplate('soc/mail/welcome.html',
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−                                       messageProperties)