Add snapshot subscription model

backend/apps/owasp/admin/__init__.py

@@ -16,6 +16,7 @@
 from .project import ProjectAdmin
 from .project_health_metrics import ProjectHealthMetricsAdmin
 from .snapshot import SnapshotAdmin
+from .snapshot_subscription import SnapshotSubscriptionAdmin
 from .sponsor import SponsorAdmin
 
 admin.site.register(ProjectHealthRequirements)

backend/apps/owasp/admin/snapshot_subscription.py

@@ -0,0 +1,44 @@
+"""Admin registration for SnapshotSubscription model."""
+
+from django.contrib import admin
+
+from apps.owasp.models.snapshot_subscription import SnapshotSubscription
+
+
+class SnapshotSubscriptionAdmin(admin.ModelAdmin):
+    """Admin for SnapshotSubscription model."""
+
+    list_display = ("user", "frequency", "is_active", "created_at", "updated_at")
+    list_filter = ("frequency", "is_active", "created_at")
+    search_fields = ("user__email", "user__username")
+    raw_id_fields = ("user",)
+    readonly_fields = ("unsubscribe_token", "created_at", "updated_at")
+
+    fieldsets = (
+        (None, {"fields": ("user", "frequency", "is_active")}),
+        (
+            "Content Preferences",
+            {
+                "fields": (
+                    "include_chapters",
+                    "include_events",
+                    "include_issues",
+                    "include_posts",
+                    "include_projects",
+                    "include_pull_requests",
+                    "include_releases",
+                    "include_users",
+                ),
+            },
+        ),
+        (
+            "System",
+            {
+                "fields": ("unsubscribe_token", "created_at", "updated_at"),
+                "classes": ("collapse",),
+            },
+        ),
+    )
+
+
+admin.site.register(SnapshotSubscription, SnapshotSubscriptionAdmin)

backend/apps/owasp/migrations/0075_snapshotsubscription.py

@@ -0,0 +1,66 @@
+# Generated by Django 6.0.6 on 2026-06-16 14:45
+
+import uuid
+
+import django.db.models.deletion
+from django.conf import settings
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ("owasp", "0074_rename_snapshot_m2m_fields"),
+        migrations.swappable_dependency(settings.AUTH_USER_MODEL),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name="SnapshotSubscription",
+            fields=[
+                (
+                    "id",
+                    models.BigAutoField(
+                        auto_created=True, primary_key=True, serialize=False, verbose_name="ID"
+                    ),
+                ),
+                (
+                    "frequency",
+                    models.CharField(
+                        choices=[("weekly", "Weekly"), ("monthly", "Monthly")],
+                        default="weekly",
+                        max_length=10,
+                    ),
+                ),
+                ("is_active", models.BooleanField(default=True)),
+                (
+                    "unsubscribe_token",
+                    models.UUIDField(default=uuid.uuid4, editable=False, unique=True),
+                ),
+                ("include_chapters", models.BooleanField(default=True)),
+                ("include_events", models.BooleanField(default=True)),
+                ("include_issues", models.BooleanField(default=True)),
+                ("include_posts", models.BooleanField(default=True)),
+                ("include_projects", models.BooleanField(default=True)),
+                ("include_pull_requests", models.BooleanField(default=True)),
+                ("include_releases", models.BooleanField(default=True)),
+                ("include_users", models.BooleanField(default=True)),
+                ("created_at", models.DateTimeField(auto_now_add=True)),
+                ("updated_at", models.DateTimeField(auto_now=True)),
+                (
+                    "user",
+                    models.OneToOneField(
+                        on_delete=django.db.models.deletion.CASCADE,
+                        related_name="snapshot_subscription",
+                        to=settings.AUTH_USER_MODEL,
+                    ),
+                ),
+            ],
+            options={
+                "verbose_name_plural": "Snapshot Subscriptions",
+                "db_table": "owasp_snapshot_subscriptions",
+                "indexes": [
+                    models.Index(fields=["is_active"], name="owasp_sub_active_idx"),
+                ],
+            },
+        ),
+    ]

backend/apps/owasp/models/__init__.py

@@ -11,4 +11,5 @@
 from .project_health_metrics import ProjectHealthMetrics
 from .project_health_requirements import ProjectHealthRequirements
 from .snapshot import Snapshot
+from .snapshot_subscription import SnapshotSubscription
 from .sponsor import Sponsor

backend/apps/owasp/models/snapshot_subscription.py

@@ -0,0 +1,85 @@
+"""OWASP app snapshot subscription model."""
+
+import uuid
+
+from django.db import models
+
+from apps.nest.models import User
+
+
+class SnapshotSubscription(models.Model):
+    """Model representing a user's subscription to snapshot digest emails."""
+
+    class Meta:
+        """Model options."""
+
+        db_table = "owasp_snapshot_subscriptions"
+        verbose_name_plural = "Snapshot Subscriptions"
+        indexes = [
+            models.Index(fields=["is_active"], name="owasp_sub_active_idx"),
+        ]
+
+    class Frequency(models.TextChoices):
+        """Subscription frequency choices."""
+
+        WEEKLY = "weekly", "Weekly"
+        MONTHLY = "monthly", "Monthly"
+
+    class Status(models.TextChoices):
+        """Subscription status choices."""
+
+        ACTIVE = "active", "Active"
+        INACTIVE = "inactive", "Inactive"
+
+    user = models.OneToOneField(
+        User,
+        on_delete=models.CASCADE,
+        related_name="snapshot_subscription",
+    )
+    frequency = models.CharField(
+        max_length=10,
+        choices=Frequency.choices,
+        default=Frequency.WEEKLY,
+    )
+    is_active = models.BooleanField(default=True)
+    unsubscribe_token = models.UUIDField(
+        default=uuid.uuid4,
+        unique=True,
+        editable=False,
+    )
+
+    # Content preferences
+    include_chapters = models.BooleanField(default=True)
+    include_events = models.BooleanField(default=True)
+    include_issues = models.BooleanField(default=True)
+    include_posts = models.BooleanField(default=True)
+    include_projects = models.BooleanField(default=True)
+    include_pull_requests = models.BooleanField(default=True)
+    include_releases = models.BooleanField(default=True)
+    include_users = models.BooleanField(default=True)
+
+    created_at = models.DateTimeField(auto_now_add=True)
+    updated_at = models.DateTimeField(auto_now=True)
+
+    def __str__(self):
+        """Return a string representation."""
+        status = (
+            SnapshotSubscription.Status.ACTIVE
+            if self.is_active
+            else SnapshotSubscription.Status.INACTIVE
+        )
+        return f"{self.user} ({self.frequency}, {status})"
+
+    @property
+    def content_preferences(self):
+        """Return a dictionary of content preference settings."""
+        return {
+            "chapters": self.include_chapters,
+            "events": self.include_events,
+            "issues": self.include_issues,
+            "posts": self.include_posts,
+            "projects": self.include_projects,
+            "pull_requests": self.include_pull_requests,
+            "releases": self.include_releases,
+            "users": self.include_users,
+        }

backend/tests/unit/apps/owasp/admin/snapshot_subscription_test.py

@@ -0,0 +1,45 @@
+"""Tests for snapshot subscription admin."""
+
+from django.contrib.admin.sites import AdminSite
+
+from apps.owasp.admin.snapshot_subscription import SnapshotSubscriptionAdmin
+from apps.owasp.models.snapshot_subscription import SnapshotSubscription
+
+
+class TestSnapshotSubscriptionAdmin:
+    """Test SnapshotSubscriptionAdmin configuration."""
+
+    def test_admin_configuration(self):
+        """Test admin configuration matches expected setup."""
+        site = AdminSite()
+        admin = SnapshotSubscriptionAdmin(SnapshotSubscription, site)
+
+        assert admin.list_display == (
+            "user",
+            "frequency",
+            "is_active",
+            "created_at",
+            "updated_at",
+        )
+        assert admin.list_filter == ("frequency", "is_active", "created_at")
+        assert admin.search_fields == ("user__email", "user__username")
+        assert admin.raw_id_fields == ("user",)
+        assert admin.readonly_fields == ("unsubscribe_token", "created_at", "updated_at")
+
+        # Check fieldsets structure
+        assert len(admin.fieldsets) == 3
+
+        # Check Content Preferences fieldset
+        preferences_fieldset = admin.fieldsets[1]
+        assert preferences_fieldset[0] == "Content Preferences"
+
+        assert preferences_fieldset[1]["fields"] == (
+            "include_chapters",
+            "include_events",
+            "include_issues",
+            "include_posts",
+            "include_projects",
+            "include_pull_requests",
+            "include_releases",
+            "include_users",
+        )

backend/tests/unit/apps/owasp/models/snapshot_subscription_test.py

@@ -0,0 +1,75 @@
+"""Tests for snapshot subscription model."""
+
+from unittest.mock import MagicMock
+
+from django.test import SimpleTestCase
+
+from apps.owasp.models.snapshot_subscription import SnapshotSubscription
+
+
+class TestSnapshotSubscription(SimpleTestCase):
+    """Test SnapshotSubscription model."""
+
+    def test_str_representation_active(self):
+        """Test string representation for active subscription."""
+        sub = MagicMock(spec=SnapshotSubscription)
+        sub.user = MagicMock()
+        sub.frequency = SnapshotSubscription.Frequency.WEEKLY
+        sub.is_active = True
+
+        result = SnapshotSubscription.__str__(sub)
+        assert result == f"{sub.user} (weekly, active)"
+
+    def test_str_representation_inactive(self):
+        """Test string representation for inactive subscription."""
+        sub = MagicMock(spec=SnapshotSubscription)
+        sub.user = MagicMock()
+        sub.frequency = SnapshotSubscription.Frequency.MONTHLY
+        sub.is_active = False
+
+        result = SnapshotSubscription.__str__(sub)
+        assert result == f"{sub.user} (monthly, inactive)"
+
+    def test_content_preferences_all_defaults(self):
+        """Test that content_preferences returns all True by default."""
+        sub = SnapshotSubscription()
+        prefs = sub.content_preferences
+        assert prefs == {
+            "chapters": True,
+            "events": True,
+            "issues": True,
+            "posts": True,
+            "projects": True,
+            "pull_requests": True,
+            "releases": True,
+            "users": True,
+        }
+
+    def test_content_preferences_custom(self):
+        """Test content_preferences with custom values."""
+        sub = MagicMock(spec=SnapshotSubscription)
+        sub.include_chapters = False
+        sub.include_events = True
+        sub.include_issues = True
+        sub.include_posts = False
+        sub.include_projects = False
+        sub.include_pull_requests = True
+        sub.include_releases = True
+        sub.include_users = True
+
+        prefs = SnapshotSubscription.content_preferences.fget(sub)
+        assert prefs == {
+            "chapters": False,
+            "events": True,
+            "issues": True,
+            "posts": False,
+            "projects": False,
+            "pull_requests": True,
+            "releases": True,
+            "users": True,
+        }
+
+    def test_frequency_choices(self):
+        """Test frequency choices are correctly defined."""
+        assert SnapshotSubscription.Frequency.WEEKLY == "weekly"
+        assert SnapshotSubscription.Frequency.MONTHLY == "monthly"