Synnefo » astakos

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

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# without modification, are permitted provided that the following

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#      disclaimer.

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#   2. Redistributions in binary form must reproduce the above

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#      disclaimer in the documentation and/or other materials

#      provided with the distribution.

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

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# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

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import logging

import socket

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 django.core.exceptions import ValidationError

from django.template import Context, loader

from urllib import quote

from urlparse import urljoin

from smtplib import SMTPException

from datetime import datetime

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

from astakos.im.models import Invitation, AstakosUser

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 SendVerificationError

    """

    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

    try:

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

    except (SMTPException, socket.error) as e:

        logger.exception(e)

        raise SendVerificationError()

    else:

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

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

    send_verification(user, template_name)

    user.activation_sent = datetime.now()

    user.save()

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

    """

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

    Raises SendNotificationError

    """

    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

    try:

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

    except (SMTPException, socket.error) as e:

        logger.exception(e)

        raise SendNotificationError()

    else:

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

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

    """

    Send invitation email.

    Raises SendInvitationError

    """

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

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

    try:

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

    except (SMTPException, socket.error) as e:

        logger.exception(e)

        raise SendInvitationError()

    else:

        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

    try:

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

    except (SMTPException, socket.error) as e:

        logger.exception(e)

        raise SendGreetingError()

    else:

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

def send_feedback(msg, data, user, email_template_name='im/feedback_mail.txt'):

    subject = _("Feedback from %s alpha2 testing" % SITENAME)

    from_email = user.email

    recipient_list = [DEFAULT_CONTACT_EMAIL]

    content = render_to_string(email_template_name, {

        'message': msg,

        'data': data,

        'user': user})

    try:

        send_mail(subject, content, from_email, recipient_list)

    except (SMTPException, socket.error) as e:

        logger.exception(e)

        raise SendFeedbackError()

    else:

        logger.info('Sent feedback from %s', user.email)

def send_change_email(ec, request, email_template_name='registration/email_change_email.txt'):

    try:

        url = reverse('email_change_confirm',

                      kwargs={'activation_key':ec.activation_key})

        url = request.build_absolute_uri(url)

        t = loader.get_template(email_template_name)

        c = {'url': url, 'site_name': SITENAME}

        from_email = DEFAULT_FROM_EMAIL

        send_mail(_("Email change on %s alpha2 testing") % SITENAME,

            t.render(Context(c)), from_email, [ec.new_email_address])

    except (SMTPException, socket.error) as e:

        logger.exception(e)

        raise ChangeEmailError()

    else:

        logger.info('Sent change email for %s', ec.user.email)

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

    """

    Activates the specific user and sends email.

    Raises SendGreetingError, ValidationError

    """

    user.is_active = True

    user.save()

    send_greeting(user, email_template_name)

def invite(invitation, inviter, email_template_name='im/welcome_email.txt'):

    """

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

    Raises SendInvitationError

    """

    invitation.inviter = inviter

    invitation.save()

    send_invitation(invitation, email_template_name)

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

    inviter.save()

def set_user_credibility(email, has_credits):

    try:

        user = AstakosUser.objects.get(email=email, is_active=True)

        user.has_credits = has_credits

        user.save()

    except AstakosUser.DoesNotExist, e:

        logger.exception(e)

    except ValidationError, e:

        logger.exception(e)

class SendMailError(Exception):

    pass

class SendAdminNotificationError(SendMailError):

    def __init__(self):

        self.message = _('Failed to send notification')

        super(SendAdminNotificationError, self).__init__()

class SendVerificationError(SendMailError):

    def __init__(self):

        self.message = _('Failed to send verification')

        super(SendVerificationError, self).__init__()

class SendInvitationError(SendMailError):

    def __init__(self):

        self.message = _('Failed to send invitation')

        super(SendInvitationError, self).__init__()

class SendGreetingError(SendMailError):

    def __init__(self):

        self.message = _('Failed to send greeting')

        super(SendGreetingError, self).__init__()

class SendFeedbackError(SendMailError):

    def __init__(self):

        self.message = _('Failed to send feedback')

        super(SendFeedbackError, self).__init__()

class ChangeEmailError(SendMailError):

    def __init__(self):

        self.message = _('Failed to send change email')

        super(ChangeEmailError, self).__init__()