more cart

pkg/backofficeadmin/app.go

@@ -15,12 +15,14 @@ import (
 	"log"
 	"net/http"
 	"os"
+	"strings"
 	"time"
 
 	actor "git.k6n.net/mats/go-cart-actor/pkg/actor"
 	"git.k6n.net/mats/go-cart-actor/pkg/cart"
 	"git.k6n.net/mats/go-cart-actor/pkg/checkout"
 	"git.k6n.net/mats/go-cart-actor/pkg/profile"
+	"git.k6n.net/mats/go-cart-actor/pkg/promotions"
 	"git.k6n.net/mats/platform/rabbit"
 	amqp "github.com/rabbitmq/amqp091-go"
 )
@@ -75,6 +77,69 @@ func New(cfg Config) (*App, error) {
 
 	_ = os.MkdirAll(cfg.DataDir, 0755)
 	reg := cart.NewCartMultationRegistry(cart.NewCartMutationContext(nil))
+
+	promotionsPath := os.Getenv("PROMOTIONS_FILE")
+	if promotionsPath == "" {
+		promotionsPath = "data/promotions.json"
+	}
+	if promotionStore, err := promotions.NewStore(promotionsPath); err == nil {
+		promotionService := promotions.NewPromotionService(nil)
+		reg.RegisterProcessor(
+			actor.NewMutationProcessor(func(ctx context.Context, g *cart.CartGrain) error {
+				for _, v := range g.Vouchers {
+					if v != nil {
+						v.BypassedByPromotions = false
+					}
+				}
+
+				g.UpdateTotals()
+				promotionCtx := promotions.NewContextFromCart(g, promotions.WithNow(time.Now()))
+				results, _ := promotionService.EvaluateAll(promotionStore.Snapshot(), promotionCtx)
+
+				hasBypassed := false
+				for _, res := range results {
+					if res.Applicable {
+						promotions.WalkConditions(res.Rule.Conditions, func(c promotions.Condition) bool {
+							if bc, ok := c.(promotions.BaseCondition); ok && bc.Type == promotions.CondCouponCode {
+								var codes []string
+								if s, ok := bc.Value.AsString(); ok {
+									codes = append(codes, strings.ToLower(s))
+								} else if arr, ok := bc.Value.AsStringSlice(); ok {
+									for _, s := range arr {
+										codes = append(codes, strings.ToLower(s))
+									}
+								}
+								for _, code := range codes {
+									for _, v := range g.Vouchers {
+										if v != nil && strings.ToLower(v.Code) == code {
+											if !v.BypassedByPromotions {
+												v.BypassedByPromotions = true
+												hasBypassed = true
+											}
+										}
+									}
+								}
+							}
+							return true
+						})
+					}
+				}
+
+				if hasBypassed {
+					g.UpdateTotals()
+					promotionCtx = promotions.NewContextFromCart(g, promotions.WithNow(time.Now()))
+					results, _ = promotionService.EvaluateAll(promotionStore.Snapshot(), promotionCtx)
+				}
+
+				promotionService.ApplyResults(g, results, promotionCtx)
+				g.Version++
+				return nil
+			}),
+		)
+	} else {
+		log.Printf("backofficeadmin: unable to load promotions store from %s: %v", promotionsPath, err)
+	}
+
 	diskStorage := actor.NewDiskStorage[cart.CartGrain](cfg.DataDir, reg)
 
 	_ = os.MkdirAll(cfg.CheckoutDataDir, 0755)