src/membership/admin.py

@@ -4,6 +4,7 @@ from django.contrib import admin
 
 from .models import Membership
 from .models import MembershipType
+from .models import ServiceAccess
 from .models import SubscriptionPeriod
 
 
@@ -20,3 +21,9 @@ class MembershipTypeAdmin(admin.ModelAdmin):
 @admin.register(SubscriptionPeriod)
 class SubscriptionPeriodAdmin(admin.ModelAdmin):
     """Admin for SubscriptionPeriod model."""
+
+
+@admin.register(ServiceAccess)
+class ServiceAccessAdmin(admin.ModelAdmin):
+    """Admin for ServiceAccess model."""
+    pass

src/membership/migrations/0006_serviceaccess_serviceaccess_unique_user_service.py

@@ -0,0 +1,64 @@
+# Generated by Django 5.0.1 on 2024-01-13 19:20
+
+import django.db.models.deletion
+import django_registries.registry
+import services.registry
+from django.conf import settings
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ("membership", "0005_member"),
+        migrations.swappable_dependency(settings.AUTH_USER_MODEL),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name="ServiceAccess",
+            fields=[
+                (
+                    "id",
+                    models.AutoField(
+                        auto_created=True,
+                        primary_key=True,
+                        serialize=False,
+                        verbose_name="ID",
+                    ),
+                ),
+                (
+                    "modified",
+                    models.DateTimeField(auto_now=True, verbose_name="modified"),
+                ),
+                (
+                    "created",
+                    models.DateTimeField(auto_now_add=True, verbose_name="created"),
+                ),
+                (
+                    "service",
+                    django_registries.registry.ChoicesField(
+                        choices=[],
+                        registry=services.registry.ServiceRegistry,
+                        verbose_name="service",
+                    ),
+                ),
+                (
+                    "user",
+                    models.ForeignKey(
+                        on_delete=django.db.models.deletion.PROTECT,
+                        to=settings.AUTH_USER_MODEL,
+                    ),
+                ),
+            ],
+            options={
+                "verbose_name": "service access",
+                "verbose_name_plural": "service accesses",
+            },
+        ),
+        migrations.AddConstraint(
+            model_name="serviceaccess",
+            constraint=models.UniqueConstraint(
+                fields=("user", "service"), name="unique_user_service"
+            ),
+        ),
+    ]

src/membership/models.py

@@ -10,6 +10,8 @@ from django.contrib.postgres.fields import RangeOperators
 from django.db import models
 from django.utils import timezone
 from django.utils.translation import gettext as _
+
+from services.registry import ServiceRegistry
 from utils.mixins import CreatedModifiedAbstract
 
 
@@ -139,3 +141,22 @@ class MembershipType(CreatedModifiedAbstract):
 
     def __str__(self) -> str:
         return self.name
+
+
+class ServiceAccess(CreatedModifiedAbstract):
+    class Meta:
+        verbose_name = _("service access")
+        verbose_name_plural = _("service accesses")
+        constraints = [
+            models.UniqueConstraint(
+                fields=["user", "service"],
+                name="unique_user_service",
+            ),
+        ]
+
+    user = models.ForeignKey("auth.User", on_delete=models.PROTECT)
+
+    service = ServiceRegistry.choices_field(verbose_name=_("service"))
+
+    def __str__(self):
+        return f"{self.user} - {self.service}"

src/project/settings.py

@@ -43,12 +43,14 @@ THIRD_PARTY_APPS = [
     "allauth",
     "allauth.account",
     "django_view_decorator",
+    "django_registries",
 ]
 
 LOCAL_APPS = [
     "utils",
     "accounting",
     "membership",
+    "services",
 ]
 
 INSTALLED_APPS = [

src/services/admin.py

@@ -0,0 +1 @@
+# Register your models here.

src/services/apps.py

@@ -0,0 +1,6 @@
+from django.apps import AppConfig
+
+
+class ServicesConfig(AppConfig):
+    default_auto_field = "django.db.models.BigAutoField"
+    name = "services"

src/services/models.py

@@ -0,0 +1 @@
+# Create your models here.

src/services/registry.py

@@ -0,0 +1,21 @@
+from django_registries.registry import Interface
+from django_registries.registry import Registry
+
+
+class ServiceRegistry(Registry):
+    """Registry for services"""
+
+    implementations_module = "services"
+
+
+class ServiceInterface(Interface):
+    """Interface for services"""
+
+    registry = ServiceRegistry
+
+    public: bool = False
+
+    # TODO: add a way to add a something which defines the required fields for a service
+    #  - maybe a list of tuples with the field name and the type of the field
+    #  this could be used to generate a form for the service, and also to validate
+    #  the data saved in a JSONField on the ServiceAccess model

src/services/services.py

@@ -0,0 +1,27 @@
+from .registry import ServiceInterface
+
+
+class MailService(ServiceInterface):
+    slug = "mail"
+
+
+class MatrixService(ServiceInterface):
+    slug = "matrix"
+
+
+class MastodonService(ServiceInterface):
+    slug = "mastodon"
+
+
+class NextcloudService(ServiceInterface):
+    slug = "nextcloud"
+
+
+class HedgeDocService(ServiceInterface):
+    slug = "hedgedoc"
+    public = True
+
+
+class RalllyService(ServiceInterface):
+    slug = "rallly"
+    public = True

src/services/tests.py

@@ -0,0 +1 @@
+# Create your tests here.

src/services/views.py

@@ -0,0 +1 @@
+# Create your views here.