feat: add favorites feature for users

- Implemented `Favorite` model with unique user-item constraint and timestamped records
- Added `favorites:index` and `favorites:toggle` views with AJAX support for toggling favorites
- Built templates and front-end assets for the favorites page and integration with item grids
- Extended header with favorites link and dynamic counter
- Added tests covering models, views, and templates for the favorites functionality
- Updated admin to enable management of favorites via Django admin interface

santehray/context_processors.py

@@ -1,2 +1,46 @@
+from django.db.models import Prefetch
+
+from items.models import Category, Subcategory
+
+
 def navigation(request):
-    return {"active": ""}
+    categories = (
+        Category.objects
+        .prefetch_related(Prefetch("subcategories", queryset=Subcategory.objects.order_by("name")))
+        .order_by("name")
+    )
+
+    current_category = None
+    current_subcategory = None
+    selected_label = "Все категории"
+    selected_value = ""
+    resolver_match = getattr(request, "resolver_match", None)
+    category_slug = None
+    if resolver_match is not None:
+        category_slug = resolver_match.kwargs.get("category")
+
+    if category_slug:
+        current_category = Category.objects.filter(slug=category_slug.lower()).first()
+
+    subcategory_slug = request.GET.get("subcategory")
+    if current_category and subcategory_slug:
+        current_subcategory = Subcategory.objects.filter(
+            category=current_category,
+            slug=subcategory_slug.lower(),
+        ).first()
+
+    if current_category and current_subcategory:
+        selected_label = f"{current_category.name} / {current_subcategory.name}"
+        selected_value = f"subcategory:{current_category.slug}:{current_subcategory.slug}"
+    elif current_category:
+        selected_label = current_category.name
+        selected_value = f"category:{current_category.slug}"
+
+    return {
+        "active": "",
+        "navigation_categories": categories,
+        "navigation_selected_label": selected_label,
+        "navigation_selected_value": selected_value,
+        "navigation_selected_category_slug": current_category.slug if current_category else None,
+        "navigation_selected_subcategory_slug": current_subcategory.slug if current_subcategory else None,
+    }

santehray/settings.py

@@ -188,6 +188,7 @@ INSTALLED_APPS = [
     'django.contrib.staticfiles',
     'home',
     'items',
+    'favorites',
     'orders',
     'users',
 ]
@@ -368,6 +369,11 @@ LOGGING = {
             "level": LOG_LEVEL,
             "propagate": False,
         },
+        "favorites": {
+            "handlers": ["console"],
+            "level": LOG_LEVEL,
+            "propagate": False,
+        },
         "orders": {
             "handlers": ["console"],
             "level": LOG_LEVEL,

santehray/urls.py

@@ -28,6 +28,7 @@ urlpatterns = [
     path("favicon.ico", views.favicon, name="favicon"),
     path('', include('home.urls')),
     path('catalog/', include('items.urls')),
+    path('favorites/', include('favorites.urls')),
     path('orders/', include('orders.urls')),
     path('users/', include('users.urls')),
     path('admin/', admin.site.urls),