time format change + days limit

internal/api/merch/dto.go

@@ -1,7 +1,5 @@
 package merch
 
-import "time"
-
 type merchBundle struct {
 	Merch     *Merch
 	Surugaya  *Surugaya
@@ -34,8 +32,8 @@ type ListResponse struct {
 }
 
 type PriceEntry struct {
-	CreatedAt time.Time `json:"created_at"`
-	Value     int       `json:"value"`
+	CreatedAt int64 `json:"created_at"`
+	Value     int   `json:"value"`
 }
 
 type OriginWithPrices struct {

internal/api/merch/service.go

@@ -103,6 +103,10 @@ func (s *service) getPrices(userUuid string, days string) ([]PricesResponse, err
 		daysInt = 7
 	}
 
+	if daysInt > 365 {
+		daysInt = 7
+	}
+
 	period := time.Now().UTC().Add(-(time.Duration(daysInt) * time.Hour * 24))
 
 	pricesList, err := s.repo.getPricesWithDays(userUuid, period)
@@ -117,7 +121,7 @@ func (s *service) getPrices(userUuid string, days string) ([]PricesResponse, err
 		}
 
 		pricesMap[item.MerchUuid][item.Origin] = append(pricesMap[item.MerchUuid][item.Origin], PriceEntry{
-			CreatedAt: item.CreatedAt,
+			CreatedAt: item.CreatedAt.Unix(),
 			Value:     item.Price,
 		})
 	}