[IMP] delivery: ease to inherit delivery currency computation

closes odoo#85946

X-original-commit: f4f833b
Signed-off-by: Arnold Moyaux <arm@odoo.com>
Signed-off-by: Wolfgang Taferner <w.taferner@wtioit.at>
Co-authored-by: Andreas Perhab <andreas.perhab@wt-io-it.at>

addons/delivery/models/delivery_grid.py

@@ -60,15 +60,28 @@ def base_on_rule_rate_shipment(self, order):
                     'price': 0.0,
                     'error_message': e.args[0],
                     'warning_message': False}
-        if order.company_id.currency_id.id != order.pricelist_id.currency_id.id:
-            price_unit = order.company_id.currency_id._convert(
-                price_unit, order.pricelist_id.currency_id, order.company_id, order.date_order or fields.Date.today())
+
+        price_unit = self._compute_currency(order, price_unit, 'company_to_pricelist')
 
         return {'success': True,
                 'price': price_unit,
                 'error_message': False,
                 'warning_message': False}
 
+    def _get_conversion_currencies(self, order, conversion):
+        if conversion == 'company_to_pricelist':
+            from_currency, to_currency = order.company_id.currency_id, order.pricelist_id.currency_id
+        elif conversion == 'pricelist_to_company':
+            from_currency, to_currency = order.currency_id, order.company_id.currency_id
+
+        return from_currency, to_currency
+
+    def _compute_currency(self, order, price, conversion):
+        from_currency, to_currency = self._get_conversion_currencies(order, conversion)
+        if from_currency.id == to_currency.id:
+            return price
+        return from_currency._convert(price, to_currency, order.company_id, order.date_order or fields.Date.today())
+
     def _get_price_available(self, order):
         self.ensure_one()
         self = self.sudo()
@@ -90,8 +103,7 @@ def _get_price_available(self, order):
             quantity += qty
         total = (order.amount_total or 0.0) - total_delivery
 
-        total = order.currency_id._convert(
-            total, order.company_id.currency_id, order.company_id, order.date_order or fields.Date.today())
+        total = self._compute_currency(order, total, 'pricelist_to_company')
 
         return self._get_price_from_picking(total, weight, volume, quantity)