Consider using the following simple Python code (as a serverless function) that replaces the whole functionality of this extension (no need for any webhook):
import pandas as pd
from txscript import TxScript, is_empty, default_to, is_set
def sum_values(values):
"""Sums values if there are any, otherwise returns an empty string (not zero)."""
return sum(v for v in values if is_set(v)) if any(is_set(v) for v in values) else ''
def rossum_hook_request_handler(payload):
t = TxScript.from_payload(payload)
# Reset the target table:
t.field.line_items_grouped = []
# Collect all relevant data:
data = []
for row in t.field.line_items:
data.append({
"item_rate_grouped": row.item_rate.attr.value, # Must use attr.value because of the `groupby` call!
"item_description_grouped": row.item_description,
"item_total_base_grouped": row.item_total_base,
"item_tax_grouped": row.item_tax,
"item_amount_total_grouped": row.item_amount_total,
})
# Group the data if any:
if len(data) > 0:
# https://pandas.pydata.org/docs/reference/api/pandas.DataFrame.html
t.field.line_items_grouped = (
pd.DataFrame(data)
.groupby('item_rate_grouped')
.agg({
"item_description_grouped": "first",
"item_total_base_grouped": sum_values,
"item_tax_grouped": sum_values,
"item_amount_total_grouped": sum_values
})
.reset_index().to_dict("records")
)
return t.hook_response()