[FIX] pos_loyalty: correct value for gift card with discount

Current behavior:
When you sell a gift card in the PoS with a discount, the value of the
gift card is not correct. For example, if you sell a gift card of 100€
with a 50% discount the customer should pay 50€ and the gift card should
be worth 100€. But the customer pays 50€ and the gift card is worth 50€.

Steps to reproduce:
- Create a gift card program
- Open a PoS session
- Sell a gift card of 100€ with a 50% discount
- Pay the order
- The value of the giftcard should be 100€ but it is 50€

opw-3221553

closes odoo/odoo#116746

X-original-commit: 1631ab332a6c9c7ca5e1f2451a51fb663534cb8e
Signed-off-by: Trinh Jacky (trj) <trj@odoo.com>
Signed-off-by: Engels Robin (roen) <roen@odoo.com>

addons/pos_loyalty/static/src/js/Loyalty.js

@@ -378,10 +378,15 @@ patch(Order.prototype, "pos_loyalty.Order", {
     wait_for_push_order() {
         return (
             !_.isEmpty(this.couponPointChanges) ||
+            this._has_gift_card_product() ||
             this._get_reward_lines().length ||
             this._super(...arguments)
         );
     },
+    _has_gift_card_product() {
+        const orderLines = this.get_orderlines();
+        return orderLines.some((line) => line.eWalletGiftCardProgram);
+    },
     /**
      * Add additional information for our ticket, such as new coupons and loyalty point gains.
      *
@@ -925,8 +930,12 @@ patch(Order.prototype, "pos_loyalty.Order", {
                             ) {
                                 continue;
                             }
+                            let price_to_use = line.get_price_with_tax();
+                            if (program.program_type === 'gift_card') {
+                                price_to_use = line.price;
+                            }
                             const pointsPerUnit = round_precision(
-                                (rule.reward_point_amount * line.get_price_with_tax()) /
+                                (rule.reward_point_amount * price_to_use) /
                                     line.get_quantity(),
                                 0.01
                             );

addons/pos_loyalty/static/src/tours/GiftCardProgramTours.js

@@ -49,3 +49,14 @@ PosLoyalty.check.orderTotalIs("35.00");
 PosLoyalty.exec.finalizeOrder("Cash", "35");
 registry.category("web_tour.tours").add("GiftCardProgramScanUseTour", { test: true, url: "/pos/web", steps: getSteps() });
 //#endregion
+
+//#region GiftCardProgramCreateSetTour1
+startSteps();
+ProductScreen.do.confirmOpeningPopup();
+ProductScreen.do.clickHomeCategory();
+ProductScreen.do.clickDisplayedProduct('Gift Card');
+ProductScreen.do.pressNumpad('Disc 5 0');
+PosLoyalty.check.orderTotalIs('25.00');
+PosLoyalty.exec.finalizeOrder('Cash', '25');
+registry.category('web_tour.tours').add('GiftCardWithDiscountTour', { test: true, url: '/pos/web', steps: getSteps() });
+//#endregion

addons/pos_loyalty/tests/test_frontend.py

@@ -815,3 +815,26 @@ class TestUi(TestPointOfSaleHttpCommon):
             "PosLoyaltyFreeProductTour2",
             login="accountman",
         )
+
+    def test_gift_card_value_with_discount(self):
+        """When selling a gift card with a discount, the value of the gift card
+        should be the amount before the discount."""
+        LoyaltyProgram = self.env['loyalty.program']
+        # Deactivate all other programs to avoid interference
+        (LoyaltyProgram.search([])).write({'pos_ok': False})
+        # But activate the gift_card_product_50 and ewallet_product_50 because they're shared among new programs.
+        self.env.ref('loyalty.gift_card_product_50').write({'active': True})
+        self.env.ref('loyalty.ewallet_product_50').write({'active': True})
+        # Create programs
+        programs = self.create_programs([
+            ('gift_card_1', 'gift_card'),
+        ])
+        # Run the tour to topup ewallets.
+        self.start_tour(
+            "/pos/web?config_id=%d" % self.main_pos_config.id,
+            "GiftCardWithDiscountTour",
+            login="accountman",
+        )
+        # Check the created gift cards.
+        self.assertEqual(len(programs['gift_card_1'].coupon_ids), 1)
+        self.assertEqual(programs['gift_card_1'].coupon_ids.points, 50)