Refactor the script to extract the mails that are registered to an events mailing list

management/commands/extract_ml_registrations.py

+# Copyright (C) 2018-2020 by BDE ENS Paris-Saclay
+# SPDX-License-Identifier: GPL-3.0-or-later
+
+from datetime import date
+
+from django.contrib.auth.models import User
+from django.core.management import BaseCommand
+from django.db.models import Q
+from member.models import Membership, Club
+from wei.models import WEIClub
+
+
+class Command(BaseCommand):
+    help = "Get mailing list registrations from the last wei. " \
+           "Usage: manage.py extract_ml_registrations -t {events,art,sport} -t {fr, en}. " \
+           "You can write this into a file with a pipe, then paste the document into your mail manager."
+
+    def add_arguments(self, parser):
+        parser.add_argument('--type', '-t', choices=["members", "clubs", "events", "art", "sport"], default="members",
+                            help='Select the type of the mailing list (default members)')
+        parser.add_argument('--lang', '-l', type=str, choices=['fr', 'en'], default='fr',
+                            help='Select the registred users of the ML of the given language. Useful only for the '
+                                 'events mailing list.')
+
+    def handle(self, *args, **options):
+        # TODO: Improve the mailing list extraction system, and link it automatically with Mailman.
+
+        if options["type"] == "members":
+            for membership in Membership.objects.filter(
+                club__name="BDE",
+                date_start__lte=date.today(),
+                date_end__gte=date.today(),
+            ).all():
+                self.stdout.write(membership.user.email)
+            return
+
+        if options["type"] == "clubs":
+            for club in Club.objects.all():
+                self.stdout.write(club.email)
+            return
+
+        # Get the list of mails that want to be registered to the events mailing list.
+        # Don't filter to valid members, old members can receive these mails as long as they want.
+        if options["type"] == "events":
+            for user in User.objects.filter(profile__ml_events_registration=options["lang"]).all():
+                self.stdout.write(user.email)
+            return
+
+        if options["type"] == "art":
+            for user in User.objects.filter(profile__ml_art_registration=True).all():
+                self.stdout.write(user.email)
+            return
+
+        if options["type"] == "sport":
+            for user in User.objects.filter(profile__ml_sport_registration=True).all():
+                self.stdout.write(user.email)
+            return