views.py

import logging

from django.conf import settings
from django.contrib import messages
from django.http import HttpResponseRedirect
from django.utils.decorators import method_decorator
from django.utils.translation import ugettext_lazy as _
from django.views.decorators.csrf import csrf_exempt
from django.views.generic import RedirectView
from django.views.generic.edit import FormMixin

from mailchimp3 import MailChimp

from .forms import NewsletterForm

logging.getLogger('opentech')


@method_decorator(csrf_exempt, name='dispatch')
class MailchimpSubscribeView(FormMixin, RedirectView):
    form_class = NewsletterForm

    def post(self, request, *args, **kwargs):
        form = self.get_form()
        if form.is_valid():
            return self.form_valid(form)
        else:
            return self.form_invalid(form)

    def form_invalid(self, form):
        messages.error(self.request, _('Sorry, there were errors with your form.') + str(form.errors))
        return HttpResponseRedirect(self.get_success_url())

    def form_valid(self, form):
        mailchimp_enabled = settings.MAILCHIMP_API_KEY and settings.MAILCHIMP_LIST_ID

        dummy_key = 'a' * 32

        client = MailChimp(mc_api=settings.MAILCHIMP_API_KEY or dummy_key, timeout=5.0, enabled=mailchimp_enabled)

        data = form.cleaned_data.copy()
        email = data.pop('email')
        data = {
            k.upper(): v
            for k, v in data.items()
        }
        try:
            client.lists.members.create(settings.MAILCHIMP_LIST_ID, {
                'email_address': email,
                'status': 'pending',
                'merge_fields': data,
            })
        except Exception as e:
            messages.warning(self.request, _('Sorry, there has been an problem. Please try again later.'))
            logging.info(e.args[0])
        else:
            messages.success(self.request, _('Thank you for subscribing'))
        return super().form_valid(form)

    def get_success_url(self):
        # Go back to where you came from
        return self.request.META['HTTP_ORIGIN']

    def get_redirect_url(self):
        # We don't know where you came from, go home
        return '/'