chore: build

backend/gestion/db/db_basket.go

@@ -150,8 +150,13 @@ func (d *Database) AddToBasket(username string, productID int, quantity float64)
 		}
 		// Une promotion active pour ce produit/quantité/catégorie s'applique
 		// automatiquement au prix facturé — indépendamment des points de
-		// fidélité (contrairement aux récompenses par palier).
+		// fidélité (contrairement aux récompenses par palier). Le montant
+		// économisé est conservé (promoDiscount) pour les statistiques
+		// admin, indépendamment de la config de promo courante au moment où
+		// ces stats seront consultées.
+		var promoDiscount float64
 		if discounted, ok := d.ApplyPromotionToPrice(productID, productInfo.Category, quantity, priceResult.Price); ok {
+			promoDiscount = priceResult.Price - discounted
 			priceResult.Price = discounted
 		}
 
@@ -167,26 +172,27 @@ func (d *Database) AddToBasket(username string, productID int, quantity float64)
 		}
 
 		var existing struct {
-			ID       int     `gorm:"column:id"`
-			Quantity float64 `gorm:"column:quantity"`
-			Price    float64 `gorm:"column:price"`
+			ID            int     `gorm:"column:id"`
+			Quantity      float64 `gorm:"column:quantity"`
+			Price         float64 `gorm:"column:price"`
+			PromoDiscount float64 `gorm:"column:promo_discount"`
 		}
 		// Chercher uniquement un item normal (non-récompense) pour ce produit
-		tx.Raw(`SELECT id, quantity, price FROM baskets WHERE username = ? AND product_id = ? AND is_reward = false`,
+		tx.Raw(`SELECT id, quantity, price, promo_discount FROM baskets WHERE username = ? AND product_id = ? AND is_reward = false`,
 			username, productID).Scan(&existing)
 
 		if existing.ID != 0 {
 			return tx.Raw(`
-                UPDATE baskets SET quantity = ?, price = ?, created_at = CURRENT_TIMESTAMP
-                WHERE id = ? AND is_reward = false RETURNING id, username, product_id, quantity, price, is_reward, created_at`,
+                UPDATE baskets SET quantity = ?, price = ?, promo_discount = ?, created_at = CURRENT_TIMESTAMP
+                WHERE id = ? AND is_reward = false RETURNING id, username, product_id, quantity, price, is_reward, promo_discount, created_at`,
 				existing.Quantity+deliveredQuantity, existing.Price+priceResult.Price,
-				existing.ID).Scan(&basket).Error
+				existing.PromoDiscount+promoDiscount, existing.ID).Scan(&basket).Error
 		}
 		return tx.Raw(`
-            INSERT INTO baskets (username, product_id, quantity, price, is_reward, created_at)
-            VALUES (?, ?, ?, ?, false, CURRENT_TIMESTAMP)
-            RETURNING id, username, product_id, quantity, price, is_reward, created_at`,
-			username, productID, deliveredQuantity, priceResult.Price).Scan(&basket).Error
+            INSERT INTO baskets (username, product_id, quantity, price, is_reward, promo_discount, created_at)
+            VALUES (?, ?, ?, ?, false, ?, CURRENT_TIMESTAMP)
+            RETURNING id, username, product_id, quantity, price, is_reward, promo_discount, created_at`,
+			username, productID, deliveredQuantity, priceResult.Price, promoDiscount).Scan(&basket).Error
 	})
 	if err != nil {
 		return nil, err