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# This file is part of Tryton. The COPYRIGHT file at the top level of
# this repository contains the full copyright notices and license terms.
from functools import partial
from itertools import groupby
from trytond.pool import PoolMeta
from trytond.tools import sortable_values
from .common import parcel_weight
class Sale(metaclass=PoolMeta):
__name__ = 'sale.sale'
def _group_parcel_key(self, lines, line):
"""
The key to group lines by parcel
"""
return ()
def _parcel_weight(self, parcel):
if self.carrier:
return parcel_weight(parcel, self.carrier.weight_uom, 'unit')
def _get_carrier_context(self, carrier):
context = super(Sale, self)._get_carrier_context(carrier)
if not carrier or carrier.carrier_cost_method != 'weight':
return context
context = context.copy()
weights = []
context['weights'] = weights
lines = [l for l in self.lines or [] if l.quantity and l.quantity > 0]
keyfunc = partial(self._group_parcel_key, lines)
lines = sorted(lines, key=sortable_values(keyfunc))
for key, parcel in groupby(lines, key=keyfunc):
weights.append(self._parcel_weight(parcel))
return context
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