[FIX] pos_self_order: compute price product variants in self order

Issue:
======
When choosing product with attributes that have attributes which have
variant creation mode never it will not take into account the extra
price.

Steps to reproduce the issue:
=============================
- Install pos , restaurant
- Create a product which have `Size` attribute and add some values in
  it, 'S' and 'M'  for example , then add extra prices in each one of
  them. Enable available in POS setting in Sales page of the product.

- Got to point of sala , click on 3 dots in restaurant and open mobile
  menu.
- Added the created product to cart and click review.
- The price shown is the original price of the product and not taking
  into account the extra price of the attribute.

Origin of the issue:
====================
This was not supported before

Solution:
=========
Using the attribute_value_ids value in the line we can calculate the
extra_price of those attributes and add it to the price_unit so we can
get taxed_amount and untaxed_amount correctly.

opw-3511374

closes odoo/odoo#142485

X-original-commit: a54fddd9270b3431a8cde0a6bf30349c5671b0ac
Signed-off-by: David Monnom (moda) <moda@odoo.com>
Signed-off-by: Mahdi Cheikh Rouhou (macr) <macr@odoo.com>

addons/pos_self_order/controllers/orders.py

@@ -223,6 +223,8 @@ class PosSelfOrderController(http.Controller):
             line_qty = line.get('qty')
             product = pos_config.env['product.product'].browse(int(line.get('product_id')))
             lst_price = pricelist._get_product_price(product, quantity=line_qty) if pricelist else product.lst_price
+            selected_attributes = fetched_attributes.browse(line.get('attribute_value_ids', []))
+            lst_price += sum([attr.price_extra for attr in selected_attributes])
 
             children = [l for l in lines if l.get('combo_parent_uuid') == line.get('uuid')]
             pos_combo_lines = combo_lines.browse([child.get('combo_line_id') for child in children])

addons/pos_self_order/static/tests/tours/test_self_order_attribute.js

@@ -19,6 +19,7 @@ registry.category("web_tour.tours").add("self_attribute_selector", {
             { name: "Size", value: "M" },
             { name: "Fabric", value: "Leather" },
         ]),
+        CartPage.checkProduct("Desk Organizer", "7.02", "1"),
         CartPage.clickBack(),
         ProductPage.clickProduct("Desk Organizer"),
         ...ProductPage.setupAttribute([
@@ -30,6 +31,7 @@ registry.category("web_tour.tours").add("self_attribute_selector", {
             { name: "Size", value: "L" },
             { name: "Fabric", value: "Leather" },
         ]),
+        CartPage.checkProduct("Desk Organizer", "8.17", "1"),
         Utils.clickBtn("Pay"),
         Utils.clickBtn("Ok"),
         Utils.clickBtn("My Order"),

addons/pos_self_order/tests/test_self_order_attribute.py

@@ -16,6 +16,11 @@ class TestSelfOrderAttribute(SelfOrderCommonTest):
             'self_ordering_service_mode': 'counter',
         })
 
+        product = self.env['product.product'].search([('name', '=', 'Desk Organizer')])[0]
+        product.attribute_line_ids[0].product_template_value_ids[0].price_extra = 0.0
+        product.attribute_line_ids[0].product_template_value_ids[1].price_extra = 1.0
+        product.attribute_line_ids[0].product_template_value_ids[2].price_extra = 2.0
+
         self.pos_config.with_user(self.pos_user).open_ui()
         self_route = self.pos_config._get_self_order_route()