chore: build

backend/gestion/handlers/product.go

@@ -8,6 +8,7 @@ import (
 	"gestion/utils"
 	"io"
 	"log"
+	"math"
 	"mime/multipart"
 	"net/http"
 	"strconv"
@@ -412,6 +413,7 @@ func GetAllProducts(c *gin.Context) {
 	if role != "admin" && role != "cabine" {
 		products = filterActivePrices(products)
 	}
+	products = applyPromotions(products, database)
 	c.JSON(http.StatusOK, gin.H{
 		"success": true,
 		"data":    products,
@@ -450,6 +452,7 @@ func GetProductsByCategory(c *gin.Context) {
 	if roleCtx != "admin" && roleCtx != "cabine" {
 		products = filterActivePrices(products)
 	}
+	products = applyPromotions(products, database)
 	c.JSON(http.StatusOK, gin.H{
 		"success": true,
 		"data":    products,
@@ -482,6 +485,7 @@ func GetProductByID(c *gin.Context) {
 	if role != "admin" && role != "cabine" {
 		filterActivepricesSingle(&product)
 	}
+	applyPromotionsSingle(&product, database)
 
 	c.JSON(http.StatusOK, gin.H{
 		"success": true,
@@ -1002,3 +1006,32 @@ func filterActivepricesSingle(product *models.Product) {
 	}
 	product.Prices = activePrices
 }
+
+// applyPromotions annote chaque palier de prix éligible avec le prix promo
+// (PromoPrice/PromoPercent) si une promotion couvre ce produit/quantité —
+// affichage seulement, le prix catalogue (Price) n'est jamais modifié ici ;
+// le prix réellement facturé est recalculé indépendamment dans AddToBasket.
+func applyPromotions(products []models.Product, database *db.Database) []models.Product {
+	settings, err := database.GetSettings()
+	if err != nil || !settings.PromotionsEnabled {
+		return products
+	}
+	for i := range products {
+		for j := range products[i].Prices {
+			pr := &products[i].Prices[j]
+			discount, ok := db.ResolvePromotionDiscount(&settings, products[i].ID, products[i].Category, pr.Quantity)
+			if !ok {
+				continue
+			}
+			promoPrice := math.Round(pr.Price*(1-discount/100)*100) / 100
+			pr.PromoPrice = &promoPrice
+			pr.PromoPercent = discount
+		}
+	}
+	return products
+}
+
+func applyPromotionsSingle(product *models.Product, database *db.Database) {
+	products := applyPromotions([]models.Product{*product}, database)
+	*product = products[0]
+}