Synnefo

# Copyright 2011 GRNET S.A. All rights reserved.

# 

# Redistribution and use in source and binary forms, with or

# without modification, are permitted provided that the following

# conditions are met:

# 

#   1. Redistributions of source code must retain the above

#      copyright notice, this list of conditions and the following

#      disclaimer.

# 

#   2. Redistributions in binary form must reproduce the above

#      copyright notice, this list of conditions and the following

#      disclaimer in the documentation and/or other materials

#      provided with the distribution.

# 

# THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``AS IS'' AND ANY EXPRESS

# OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED

# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GRNET S.A OR

# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,

# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT

# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF

# USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED

# AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN

# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE

# POSSIBILITY OF SUCH DAMAGE.

# 

# The views and conclusions contained in the software and

# documentation are those of the authors and should not be

# interpreted as representing official policies, either expressed

# or implied, of GRNET S.A.

import logging

from django.utils.translation import ugettext as _

from django.template.loader import render_to_string

from django.core.mail import send_mail

from django.core.urlresolvers import reverse

from urlparse import urljoin

from random import randint

from astakos.im.settings import DEFAULT_CONTACT_EMAIL, DEFAULT_FROM_EMAIL, SITENAME, BASEURL

from astakos.im.models import Invitation

logger = logging.getLogger(__name__)

def activate(user, email_template_name='im/welcome_email.txt'):

    """

    Activates the specific user and sends email.

    Raises SMTPException, socket.error

    """

    user.is_active = True

    user.save()

    subject = _('Welcome to %s' % SITENAME)

    message = render_to_string(email_template_name, {

                'user': user,

                'url': urljoin(BASEURL, reverse('astakos.im.views.index')),

                'baseurl': BASEURL,

                'site_name': SITENAME,

                'support': DEFAULT_CONTACT_EMAIL})

    sender = DEFAULT_FROM_EMAIL

    send_mail(subject, message, sender, [user.email])

    logger.info('Sent greeting %s', user)

def _generate_invitation_code():

    while True:

        code = randint(1, 2L**63 - 1)

        try:

            Invitation.objects.get(code=code)

            # An invitation with this code already exists, try again

        except Invitation.DoesNotExist:

            return code

def invite(inviter, username, realname):

    """

    Send an invitation email and upon success reduces inviter's invitation by one.

    Raises SMTPException, socket.error

    """

    code = _generate_invitation_code()

    invitation = Invitation(inviter=inviter,

                            username=username,

                            code=code,

                            realname=realname)

    invitation.save()

    subject = _('Invitation to %s' % SITENAME)

    url = '%s?code=%d' % (urljoin(BASEURL, reverse('astakos.im.views.signup')), code)

    message = render_to_string('im/invitation.txt', {

                'invitation': invitation,

                'url': url,

                'baseurl': BASEURL,

                'service': SITENAME,

                'support': DEFAULT_CONTACT_EMAIL})

    sender = DEFAULT_FROM_EMAIL

    send_mail(subject, message, sender, [invitation.username])

    logger.info('Sent invitation %s', invitation)

    inviter.invitations = max(0, inviter.invitations - 1)

    inviter.save()