Implement synonym management in condition detail: add forms for adding synonyms and handle POST requests for synonym creation.

atlas/views.py

@@ -830,7 +830,12 @@ def question_schema_schemas(request):
 def condition_detail(request, pk):
     condition = get_object_or_404(Condition, pk=pk)
 
-    form = ConditionAutocompleteForm()
+    # form used for the merge UI
+    merge_form = ConditionAutocompleteForm()
+
+    # form used to add a synonym (can post either an existing condition via autocomplete
+    # or provide a plain name in 'synonym_name')
+    synonym_form = ConditionAutocompleteForm()
 
     can_merge = False
 
@@ -840,11 +845,47 @@ def condition_detail(request, pk):
     ):
         can_merge = True
 
+    # Handle POST to add a synonym
+    if request.method == "POST" and request.POST.get("action") == "add_synonym":
+        # only allow staff/editors
+        if not (
+            request.user.is_superuser
+            or request.user.groups.filter(name="atlas_editor").exists()
+        ):
+            return HttpResponse("Forbidden", status=403)
+
+        # Try autocomplete-selected condition first
+        form = ConditionAutocompleteForm(request.POST)
+        other = None
+        if form.is_valid():
+            other = form.cleaned_data.get("condition")
+
+        # If no autocomplete selection, accept a free-text name
+        synonym_name = request.POST.get("synonym_name")
+        if not other and synonym_name:
+            other, created = Condition.objects.get_or_create(name=synonym_name)
+            if created:
+                # mark created synonym as non-primary
+                other.primary = False
+                other.save()
+
+        if other and other != condition:
+            # add mutual synonym relationship
+            condition.synonym.add(other)
+            other.synonym.add(condition)
+
+        return redirect("atlas:condition_detail", pk=condition.pk)
+
     # logging.debug(atlas.subspecialty.first().name.all())
     return render(
         request,
         "atlas/condition_detail.html",
-        {"condition": condition, "form": form, "can_merge": can_merge},
+        {
+            "condition": condition,
+            "form": merge_form,
+            "synonym_form": synonym_form,
+            "can_merge": can_merge,
+        },
     )