Synnefo

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

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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 urllib import quote

from urlparse import urljoin

from random import randint

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

from astakos.im.models import Invitation

logger = logging.getLogger(__name__)

def send_verification(user, template_name='im/activation_email.txt'):

    """

    Send email to user to verify his/her email and activate his/her account.

    Raises SMTPException, socket.error

    """

    url = '%s?auth=%s&next=%s' % (urljoin(BASEURL, reverse('astakos.im.views.activate')),

                                    quote(user.auth_token),

                                    quote(BASEURL))

    message = render_to_string(template_name, {

            'user': user,

            'url': url,

            'baseurl': BASEURL,

            'site_name': SITENAME,

            'support': DEFAULT_CONTACT_EMAIL})

    sender = DEFAULT_FROM_EMAIL

    send_mail('%s alpha2 testing account activation is needed' % SITENAME, message, sender, [user.email])

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

def send_notification(user, template_name='im/admin_notification.txt'):

    """

    Send email to DEFAULT_ADMIN_EMAIL to notify for a new user registration.

    Raises SMTPException, socket.error

    """

    if not DEFAULT_ADMIN_EMAIL:

        return

    message = render_to_string(template_name, {

            'user': user,

            'baseurl': BASEURL,

            'site_name': SITENAME,

            'support': DEFAULT_CONTACT_EMAIL})

    sender = DEFAULT_FROM_EMAIL

    send_mail('%s alpha2 testing account notification' % SITENAME, message, sender, [DEFAULT_ADMIN_EMAIL])

    logger.info('Sent admin notification for user %s', user)

def send_invitation(invitation, template_name='im/invitation.txt'):

    """

    Send invitation email.

    Raises SMTPException, socket.error

    """

    subject = _('Invitation to %s alpha2 testing' % SITENAME)

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

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

                'invitation': invitation,

                'url': url,

                'baseurl': BASEURL,

                'site_name': SITENAME,

                'support': DEFAULT_CONTACT_EMAIL})

    sender = DEFAULT_FROM_EMAIL

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

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

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

    """

    Send welcome email.

    Raises SMTPException, socket.error

    """

    subject = _('Welcome to %s alpha2 testing' % 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 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()

    send_greeting(user, email_template_name)

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, email_template_name='im/welcome_email.txt'):

    """

    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()

    send_invitation(invitation, email_template_name)

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

    inviter.save()