Add missing data for snapshot html plot

nummi/main/views.py

@@ -231,6 +231,30 @@ class SnapshotUpdateView(NummiUpdateView):
             data["transactions_url"] = reverse_lazy(
                 "snapshot_transactions", args=(snapshot.pk,)
             )
+        if _transactions:
+            data["categories"] = (
+                _transactions.values(
+                    "category", "category__name", "category__icon"
+                )
+                .annotate(
+                    sum=models.Sum("value"),
+                    sum_m=models.Sum("value", filter=models.Q(value__lt=0)),
+                    sum_p=models.Sum("value", filter=models.Q(value__gt=0)),
+                )
+                .order_by("-sum")
+            )
+            data["cat_lim"] = max(
+                map(
+                    lambda x: abs(x) if x else 0,
+                    data["categories"]
+                    .aggregate(
+                        max=models.Max("sum_p"),
+                        min=models.Min("sum_m"),
+                    )
+                    .values(),
+                )
+            )
+            data["cat_lim_m"] = -data["cat_lim"]
 
         return data | {
             "new_transaction_url": reverse_lazy(