Add a Django command for dumping the email address of all subscribers

# -*- coding: utf-8 -*-

from __future__ import unicode_literals

import datetime

from django.core.management.base import BaseCommand, CommandError

from django.db.models import Q

from coin.offers.models import OfferSubscription

class Command(BaseCommand):

    help = 'Returns the email addresses of all subscribers, in a format suitable for bulk importing in Sympa'

    def handle(self, *args, **options):

        emails = [s.member.email for s in OfferSubscription.objects.filter(Q(resign_date__gt=datetime.date.today) | Q(resign_date__isnull=True))]

        # Use a set to ensure uniqueness

        for email in set(emails):

            self.stdout.write(email)