add base logic for activate promo

internal/controller/promocode/promocode_controller.go

@@ -83,3 +83,30 @@ func (p *PromoCodeController) GetList(c *fiber.Ctx) error {
 	}
 	return c.Status(fiber.StatusOK).JSON(resp)
 }
+
+func (p *PromoCodeController) Activate(c *fiber.Ctx) error {
+	var req models.ActivateReq
+	if err := c.BodyParser(&req); err != nil {
+		return c.Status(fiber.StatusBadRequest).JSON(fiber.Map{"error": "Invalid request payload"})
+	}
+
+	if req.Codeword == "" {
+		return c.Status(fiber.StatusBadRequest).JSON(fiber.Map{"error": "codeword is required"})
+	}
+
+	greetings, err := p.promoCodeService.ActivatePromo(c.Context(), &req)
+	if err != nil {
+		p.logger.Error("Failed to activate promocode", zap.Error(err))
+
+		if errors.Is(err, repository.ErrPromoCodeNotFound) {
+			return c.Status(fiber.StatusNotFound).JSON(fiber.Map{"error": "PromoCode not found"})
+		}
+		
+		return c.Status(fiber.StatusInternalServerError).JSON(fiber.Map{"error": "Internal Server Error"})
+	}
+
+	resp := models.ActivateResp{
+		Greetings: greetings,
+	}
+	return c.Status(fiber.StatusOK).JSON(resp)
+}

internal/models/bonus.go

@@ -56,3 +56,11 @@ type GetPromoCodesListResp struct {
 	Count int64       `json:"count"` // количество в выборке всего
 	Items []PromoCode `json:"items"` // "страница" промокодов
 }
+
+type ActivateReq struct {
+	Codeword string `json:"codeword"`
+}
+
+type ActivateResp struct {
+	Greetings string `json:"greetings"` // поле из активированного промокода
+}

internal/repository/promocode_repository.go

@@ -185,3 +185,47 @@ func (r *PromoCodeRepository) GetPromoCodesList(ctx context.Context, req *models
 
 	return promoCodes, count, nil
 }
+
+func (r *PromoCodeRepository) ActivatePromo(ctx context.Context, req *models.ActivateReq) (string, error) {
+	session, err := r.mdb.Database().Client().StartSession()
+	if err != nil {
+		return "", err
+	}
+	defer session.EndSession(ctx)
+
+	var greetings string
+
+	transactionErr := mongo.WithSession(ctx, session, func(sc mongo.SessionContext) error {
+		filter := bson.M{
+			"codeword":        req.Codeword,
+			"delete":          false,
+			"outdated":        false,
+			"offLimit":        false,
+			"activationCount": bson.M{"$gt": 0},
+			"dueTo":           bson.M{"$gt": time.Now().Unix()},
+		}
+		update := bson.M{
+			"$inc": bson.M{"activationCount": -1},
+		}
+		opts := options.FindOneAndUpdate().SetReturnDocument(options.After)
+
+		var updatedPromoCode models.PromoCode
+		err := r.mdb.FindOneAndUpdate(sc, filter, update, opts).Decode(&updatedPromoCode)
+		if err != nil {
+			if err == mongo.ErrNoDocuments {
+				return ErrPromoCodeNotFound
+			}
+			return err
+		}
+
+		greetings = updatedPromoCode.Greetings
+
+		return nil
+	})
+
+	if transactionErr != nil {
+		return "", transactionErr
+	}
+
+	return greetings, nil
+}

internal/server/http/http_server.go

@@ -60,6 +60,7 @@ func (s *Server) registerRoutes() {
 	s.app.Post("/promocode/create", s.PromoCodeController.CreatePromoCode)
 	s.app.Put("/promocode/edit", s.PromoCodeController.EditPromoCode)
 	s.app.Post("/promocode/getList", s.PromoCodeController.GetList)
+	s.app.Post("/promocode/activate", s.PromoCodeController.Activate)
 	//... other
 }
 

internal/services/promocode_service.go

@@ -10,6 +10,7 @@ type PromoCodeRepository interface {
 	CreatePromoCode(ctx context.Context, req *models.PromoCode) (*models.PromoCode, error)
 	EditPromoCode(ctx context.Context, req *models.ReqEditPromoCode) (*models.PromoCode, error)
 	GetPromoCodesList(ctx context.Context, req *models.GetPromoCodesListReq) ([]models.PromoCode, int64, error)
+	ActivatePromo(ctx context.Context, req *models.ActivateReq) (string, error)
 }
 
 type PromoDeps struct {
@@ -58,3 +59,13 @@ func (s *PromoCodeService) GetPromoCodesList(ctx context.Context, req *models.Ge
 
 	return promoCodes, count, nil
 }
+
+func (s *PromoCodeService) ActivatePromo(ctx context.Context, req *models.ActivateReq) (string, error) {
+	greetings, err := s.promoCodeRepo.ActivatePromo(ctx, req)
+	if err != nil {
+		s.logger.Error("Failed to activate promocode", zap.Error(err))
+		return "", err
+	}
+
+	return greetings, nil
+}