Callback: buy

buy (Groovy only)

This callback is called after preClick if item has price defined and generic shop is enabled for this inventory. This callback is cancellable so you can check, if it's canceled or cancel it. The cancelation will do nothing. Can be used with single item or with all items. These callbacks are called while ShopTransactionEvent is called. It's useful to register this callback just globally.

import org.bukkit.inventory.ItemStack;
import org.bukkit.Material;

inventory {
   buy {
     // this callback will run when you click on some item with price
       def currency = new ItemStack(Material.getMaterial(getType()), getPrice())
       if (hasPlayerInInventory(currency)) {
            sellStack(currency)
            buyStack()
       }
   }

   item ('STONE for 1 DIRT')
   item ('GRAVEL for 5 DIRT') {
     buy {
       player.sendMessage 'Yay you are going to buy gravel'
     }

     /* Items inside category won't be affected with parent's callbacks */
     item('DIRT')
   }
}

All methods available inside buy can be found here