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path: root/management/commands/sendmails.py
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#    Copyright (C) 2017  Alban Gruin
#
#    celcatsanitizer is free software: you can redistribute it and/or modify
#    it under the terms of the GNU Affero General Public License as published
#    by the Free Software Foundation, either version 3 of the License, or
#    (at your option) any later version.
#
#    celcatsanitizer is distributed in the hope that it will be useful,
#    but WITHOUT ANY WARRANTY; without even the implied warranty of
#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#    GNU Affero General Public License for more details.
#
#    You should have received a copy of the GNU Affero General Public License
#    along with celcatsanitizer.  If not, see <http://www.gnu.org/licenses/>.

from django.core.management.base import BaseCommand
from django.core.mail import send_mass_mail
from django.utils import translation
from django.template import Context, loader
from django.conf import settings

from edt.models import Course, Subscription
from edt.utils import get_current_or_next_week, get_week, group_courses


class Command(BaseCommand):
    help = "Sends emails to subscribed users"

    def add_arguments(self, parser):
        parser.add_argument("--test", help="Print the content of mails instead of sending them", action="store_true")

    def handle(self, *args, **options):
        translation.activate(settings.LANGUAGE_CODE)

        year, week = get_current_or_next_week()
        start, end = get_week(year, week)

        subscriptions = Subscription.objects.filter(active=True)
        content = {}
        mails = []

        footer = loader.get_template("mail/mail_footer.txt")
        timetable = loader.get_template("mail/mail_timetable.txt")

        print("Generating messages...")
        for subscription in subscriptions:
            if subscription.group.id not in content:
                courses = Course.objects.get_courses_for_group(subscription.group, begin__gte=start, begin__lt=end)

                grouped_courses = group_courses(courses)
                context = Context({"courses": grouped_courses, "group": subscription.group, "week": week})
                content[subscription.group.id] = timetable.render(context)

                if options["test"]:
                    print(subscription.group)
                    print(content[subscription.group.id])

            if not options["test"]:
                context = Context({"admins": settings.ADMINS, "token": subscription.token, "domain": settings.DEFAULT_DOMAIN})
                mail_content = content[subscription.group.id] + footer.render(context)
                mails.append(("{0} - {1} - Semaine {2}".format(subscription.group.timetable, subscription.group, week), mail_content, settings.DEFAULT_FROM_EMAIL, [subscription.email],))

        if not options["test"]:
            print("Sending mails...")
            send_mass_mail(mails)

        self.stdout.write(self.style.SUCCESS("Done."))