Synnefo

from django.db import models, IntegrityError

from django.template.loader import render_to_string

from django.core.mail import send_mail

from django.db import transaction

from astakos.im.settings import DEFAULT_USER_LEVEL, INVITATIONS_PER_LEVEL, \

AUTH_TOKEN_DURATION, BILLING_FIELDS, QUEUE_CONNECTION, SITENAME, \

EMAILCHANGE_ACTIVATION_DAYS

    return None

class EmailChangeManager(models.Manager):

    @transaction.commit_on_success

    def change_email(self, activation_key):

        """

        Validate an activation key and change the corresponding

        ``User`` if valid.

        If the key is valid and has not expired, return the ``User``

        after activating.

        If the key is not valid or has expired, return ``None``.

        If the key is valid but the ``User`` is already active,

        return ``None``.

        After successful email change the activation record is deleted.

        Throws ValueError if there is already

        """

        try:

            email_change = self.model.objects.get(activation_key=activation_key)

            if email_change.activation_key_expired():

                email_change.delete()

                raise EmailChange.DoesNotExist

            # is there an active user with this address?

            try:

                AstakosUser.objects.get(email=email_change.new_email_address)

            except AstakosUser.DoesNotExist:

                pass

            else:

                raise ValueError(_('The new email address is reserved.'))

            # update user

            user = AstakosUser.objects.get(pk=email_change.user_id)

            user.email = email_change.new_email_address

            user.save()

            email_change.delete()

            return user

        except EmailChange.DoesNotExist:

            raise ValueError(_('Invalid activation key'))

class EmailChange(models.Model):

    new_email_address = models.EmailField(_(u'new e-mail address'), help_text=_(u'Your old email address will be used until you verify your new one.'))

    user = models.ForeignKey(AstakosUser, unique=True, related_name='emailchange_user')

    requested_at = models.DateTimeField(default=datetime.now())

    activation_key = models.CharField(max_length=40, unique=True, db_index=True)

    objects = EmailChangeManager()

    def activation_key_expired(self):

        expiration_date = timedelta(days=EMAILCHANGE_ACTIVATION_DAYS)

        return self.requested_at + expiration_date < datetime.now()