package shop import ( "net/http" "sync" "github.com/aerogo/aero" "github.com/animenotifier/notify.moe/arn" ) var itemBuyMutex sync.Mutex // BuyItem ... func BuyItem(ctx aero.Context) error { // Lock via mutex to prevent race conditions itemBuyMutex.Lock() defer itemBuyMutex.Unlock() // Logged in user user := arn.GetUserFromContext(ctx) if user == nil { return ctx.Error(http.StatusUnauthorized, "Not logged in") } // Item ID and quantity itemID := ctx.Get("item") quantity, err := ctx.GetInt("quantity") if err != nil || quantity == 0 { return ctx.Error(http.StatusBadRequest, "Invalid item quantity", err) } item, err := arn.GetShopItem(itemID) if err != nil { return ctx.Error(http.StatusInternalServerError, "Error fetching item data", err) } // Calculate total price and subtract balance totalPrice := int(item.Price) * quantity if user.Balance < totalPrice { return ctx.Error(http.StatusBadRequest, "Not enough gems. You need to charge up your balance before you can buy this item.") } // Add item to user inventory inventory := user.Inventory() err = inventory.AddItem(itemID, uint(quantity)) if err != nil { return ctx.Error(http.StatusBadRequest, err) } inventory.Save() // Deduct balance user.Balance -= totalPrice user.Save() // Save purchase purchase := arn.NewPurchase(user.ID, itemID, quantity, int(item.Price), "gem") purchase.Save() return nil }