[Feature] Identify Missing Rules (#177)

Fixes #97
Co-authored-by: Tim Lorsbach <tim@lorsba.ch>
Reviewed-on: enviPath/enviPy#177

epdb/views.py

@@ -1866,6 +1866,25 @@ def package_pathway(request, package_uuid, pathway_uuid):
 
             return response
 
+        if (
+            request.GET.get("identify-missing-rules", False) == "true"
+            and request.GET.get("rule-package") is not None
+        ):
+            from .tasks import dispatch_eager, identify_missing_rules
+
+            rule_package = PackageManager.get_package_by_url(
+                current_user, request.GET.get("rule-package")
+            )
+            res = dispatch_eager(
+                current_user, identify_missing_rules, [current_pathway.pk], rule_package.pk
+            )
+
+            filename = f"{current_pathway.name.replace(' ', '_')}_{current_pathway.uuid}.csv"
+            response = HttpResponse(res, content_type="text/csv")
+            response["Content-Disposition"] = f'attachment; filename="{filename}"'
+
+            return response
+
         # Pathway d3_json() relies on a lot of related objects (Nodes, Structures, Edges, Reaction, Rules, ...)
         # we will again fetch the current pathway identified by this url, but this time together with nearly all
         # related objects