Add sorting functionality to normal cases list with user-selected options

atlas/views.py

@@ -386,13 +386,47 @@ class NormalCaseList(LoginRequiredMixin, FilterView):
     filterset_class = NormalCaseFilter
     paginate_by = 25
 
+    SORT_CHOICES = {
+        "newest": "-added_date",
+        "oldest": "added_date",
+        "age_asc": "age_days",
+        "age_desc": "-age_days",
+        "title_asc": "case__title",
+        "title_desc": "-case__title",
+    }
+
+    def get_selected_sort(self):
+        sort_key = self.request.GET.get("sort", "newest")
+        if sort_key not in self.SORT_CHOICES:
+            return "newest"
+        return sort_key
+
     def get_queryset(self):
         qs = NormalCase.objects.select_related("case", "examination", "modality")
         # Restrict similar to CaseFilter: non-editors only see authored or open_access
         if not self.request.user.groups.filter(name="atlas_editor").exists():
             qs = qs.filter((Q(case__author__id=self.request.user.id) | Q(case__open_access=True)))
 
-        return qs.order_by("-added_date")
+        order_by = self.SORT_CHOICES[self.get_selected_sort()]
+        return qs.order_by(order_by)
+
+    def get_context_data(self, **kwargs):
+        context = super().get_context_data(**kwargs)
+        context["selected_sort"] = self.get_selected_sort()
+        context["sort_choices"] = [
+            ("newest", "Newest added"),
+            ("oldest", "Oldest added"),
+            ("age_asc", "Age (youngest first)"),
+            ("age_desc", "Age (oldest first)"),
+            ("title_asc", "Title (A–Z)"),
+            ("title_desc", "Title (Z–A)"),
+        ]
+
+        params = self.request.GET.copy()
+        if "page" in params:
+            params.pop("page")
+        context["querystring_without_page"] = params.urlencode()
+        return context
 
 @login_required
 @user_has_case_view_access