Add support for subscribing to games

templates/base.html

@@ -55,6 +55,16 @@
             <a href="{% url 'accounts:login' %}">Login</a> |
             <a href="{% url 'accounts:signup' %}">Sign Up</a>
         {% endif %}
+        {% if messages %}
+            <ul>
+                {% for message in messages %}
+                    <li>
+                        {% if message.level == DEFAULT_MESSAGE_LEVELS.ERROR %}Important:{% endif %}
+                        {{ message }}
+                    </li>
+                {% endfor %}
+            </ul>
+        {% endif %}
         {% block content %}
             <!-- Main content will be injected here -->
         {% endblock content %}

templates/twitch/game_detail.html

@@ -4,14 +4,29 @@
 {% endblock title %}
 {% block content %}
     <h1>{{ game.display_name }}</h1>
+    {% if user.is_authenticated %}
+        <form method="post"
+              action="{% url 'twitch:subscribe_notifications' game_id=game.id %}">
+            {% csrf_token %}
             <div>
-        <input type="checkbox" id="found" />
+                <input type="checkbox"
+                       id="found"
+                       name="notify_found"
+                       {% if subscription and subscription.notify_found %}checked{% endif %} />
                 <label for="found">🔔 Get notified as soon as a drop for {{ game.display_name }} appears on Twitch.</label>
             </div>
             <div>
-        <input type="checkbox" id="live" />
+                <input type="checkbox"
+                       id="live"
+                       name="notify_live"
+                       {% if subscription and subscription.notify_live %}checked{% endif %} />
                 <label for="live">🎮 Get notified when the drop is live and ready to be farmed.</label>
             </div>
+            <button type="submit">Save notification preferences</button>
+        </form>
+    {% else %}
+        Login to subscribe!
+    {% endif %}
     {% if active_campaigns %}
         <h5>Active Campaigns</h5>
         <table>

twitch/migrations/0002_notificationsubscription.py

@@ -0,0 +1,29 @@
+# Generated by Django 5.2.4 on 2025-08-02 02:08
+
+import django.db.models.deletion
+from django.conf import settings
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('twitch', '0001_initial'),
+        migrations.swappable_dependency(settings.AUTH_USER_MODEL),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='NotificationSubscription',
+            fields=[
+                ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('notify_found', models.BooleanField(default=False)),
+                ('notify_live', models.BooleanField(default=False)),
+                ('game', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to='twitch.game')),
+                ('user', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to=settings.AUTH_USER_MODEL)),
+            ],
+            options={
+                'unique_together': {('user', 'game')},
+            },
+        ),
+    ]

twitch/models.py

@@ -5,6 +5,8 @@ from typing import ClassVar
 from django.db import models
 from django.utils import timezone
 
+from accounts.models import User
+
 
 class Game(models.Model):
     """Represents a game on Twitch."""
@@ -195,3 +197,18 @@ class DropBenefitEdge(models.Model):
     def __str__(self) -> str:
         """Return a string representation of the drop benefit edge."""
         return f"{self.drop.name} - {self.benefit.name}"
+
+
+class NotificationSubscription(models.Model):
+    """Users can subscribe to games to get notified."""
+
+    user = models.ForeignKey(User, on_delete=models.CASCADE)
+    game = models.ForeignKey(Game, on_delete=models.CASCADE)
+    notify_found = models.BooleanField(default=False)
+    notify_live = models.BooleanField(default=False)
+
+    class Meta:
+        unique_together = ("user", "game")
+
+    def __str__(self) -> str:
+        return f"{self.user} subscription to {Game.display_name}"

twitch/urls.py

@@ -12,4 +12,5 @@ urlpatterns = [
     path("campaigns/<str:pk>/", views.DropCampaignDetailView.as_view(), name="campaign_detail"),
     path("games/", views.GameListView.as_view(), name="game_list"),
     path("games/<str:pk>/", views.GameDetailView.as_view(), name="game_detail"),
+    path("games/<str:game_id>/subscribe/", views.subscribe_notifications, name="subscribe_notifications"),
 ]

twitch/views.py

@@ -4,19 +4,22 @@ import logging
 from dataclasses import dataclass
 from typing import TYPE_CHECKING, Any, cast
 
+from django.contrib import messages
+from django.contrib.auth.decorators import login_required
 from django.db.models import Count, Prefetch, Q
 from django.db.models.query import QuerySet
-from django.shortcuts import render
+from django.shortcuts import get_object_or_404, redirect, render
 from django.utils import timezone
 from django.views.generic import DetailView, ListView
 
-from twitch.models import DropCampaign, Game, Organization, TimeBasedDrop
+from twitch.models import DropCampaign, Game, NotificationSubscription, Organization, TimeBasedDrop
 
 if TYPE_CHECKING:
     import datetime
 
     from django.db.models import QuerySet
     from django.http import HttpRequest, HttpResponse
+    from django.http.response import HttpResponseRedirect
 
 logger: logging.Logger = logging.getLogger(__name__)
 
@@ -229,6 +232,12 @@ class GameDetailView(DetailView):
         context: dict[str, Any] = super().get_context_data(**kwargs)
         game: Game = self.get_object()
 
+        user = self.request.user
+        if not user.is_authenticated:
+            subscription: NotificationSubscription | None = None
+        else:
+            subscription = NotificationSubscription.objects.filter(user=user, game=game).first()
+
         now: datetime.datetime = timezone.now()
         all_campaigns: QuerySet[DropCampaign, DropCampaign] = (
             DropCampaign.objects.filter(game=game).select_related("owner").order_by("-end_at")
@@ -248,6 +257,7 @@ class GameDetailView(DetailView):
             "active_campaigns": active_campaigns,
             "upcoming_campaigns": upcoming_campaigns,
             "expired_campaigns": expired_campaigns,
+            "subscription": subscription,
             "now": now,
         })
 
@@ -305,3 +315,45 @@ def dashboard(request: HttpRequest) -> HttpResponse:
             "now": now,
         },
     )
+
+
+@login_required
+def subscribe_notifications(request: HttpRequest, game_id: str) -> HttpResponseRedirect:
+    """Update notification for a user.
+
+    Args:
+        request: The HTTP request.
+        game_id: The game we are updating.
+
+    Returns:
+        Redirect back to the twitch:game_detail.
+    """
+    game: Game = get_object_or_404(Game, pk=game_id)
+    if request.method == "POST":
+        notify_found = bool(request.POST.get("notify_found"))
+        notify_live = bool(request.POST.get("notify_live"))
+
+        subscription, created = NotificationSubscription.objects.get_or_create(user=request.user, game=game)
+
+        changes = []
+        if not created:
+            if subscription.notify_found != notify_found:
+                changes.append(f"Notify when drop is found: {'enabled' if notify_found else 'disabled'}")
+            if subscription.notify_live != notify_live:
+                changes.append(f"Notify when drop is farmable: {'enabled' if notify_live else 'disabled'}")
+
+        subscription.notify_found = notify_found
+        subscription.notify_live = notify_live
+        subscription.save()
+
+        if created:
+            message = "You have subscribed to notifications for this game."
+        elif changes:
+            message = "Updated notification preferences: " + ", ".join(changes)
+        else:
+            message = "No changes were made to your notification preferences."
+
+        messages.success(request, message)
+        return redirect("twitch:game_detail", pk=game.id)
+
+    return redirect("twitch:game_detail", pk=game.id)