Can't damage (reduce an item) an ItemStack

[ColdFox]

So I've this code:

@ForgeSubscribe
public void preventInvalidBlocks(PlayerInteractEvent event) {
	try {
		if (event.action == event.action.RIGHT_CLICK_BLOCK && Block.blocksList[event.entityPlayer.inventory.getCurrentItem().itemID].getFlammability(null, 0, 0, 0, 0, null)>0) {
			int x = event.x;
			int y = event.y;
			int z = event.z;
			int face = event.face;

			switch(face){
			case 0:
				--y;
				break;
			case 1:
				++y;
				break;
			case 2:
				--z;
				break;
			case 3:
				++z;
				break;
			case 4:
				--x;
				break;
			case 5:
				++x;
				break;
			}
			if(event.entityPlayer.inventory.getCurrentItem().stackSize>0)
				event.entityPlayer.inventory.getCurrentItem().stackSize--;

			//It seems to be necessary otherwise the player wouldn't catch on fire when walking over it
			for (int j = 0; j < MinecraftServer.getServer().worldServers.length; j++) {
				MinecraftServer.getServer().worldServers[j].setBlock(x, y, z, Block.fire.blockID);
			}

			event.setCanceled(true);
			System.out.println("Invalid block placed!");
		}
	} catch (NullPointerException e) {
		System.out.println(e.getMessage());

	}
}

 

and it places fire instead the block. this part works well, the only problem seems to be reducing the size of the itemstack. I tried many ways and didn't succeed. What happens is that the stacks loses an item but it have it back immediately.

 

Example: I've 64 wooden planks. I place one on the ground and it's replaced by fire. The stacksize drops to 63 and goes back to 64.

[GotoLink]

Server side only.

[Alexiy]

You have to get EntityPlayerMP instance and use .inventory.setInventorySlotContents(slotNumber, itemStack).

[ColdFox]

  On 9/22/2013 at 7:35 AM, Alexiy said:

You have to get EntityPlayerMP instance and use .inventory.setInventorySlotContents(slotNumber, itemStack).

 

How do I get the EntityPlayerMP from the event?

[ColdFox]

  On 9/22/2013 at 1:58 PM, ColdFox said:

  Quote

You have to get EntityPlayerMP instance and use .inventory.setInventorySlotContents(slotNumber, itemStack).

 

How do I get the EntityPlayerMP from the event?

 

I made it work like this

@ForgeSubscribe
public void preventInvalidBlocks(PlayerInteractEvent event) {
try {
	if (event.action == event.action.RIGHT_CLICK_BLOCK && 
		Block.blocksList[event.entityPlayer.inventory.getCurrentItem().itemID].getFlammability(null, 0, 0, 0, 0, null)>0) {
		int x = event.x;
		int y = event.y;
		int z = event.z;
		int face = event.face;

		switch(face){
		case 0:
			--y;
			break;
		case 1:
			++y;
			break;
		case 2:
			--z;
			break;
		case 3:
			++z;
			break;
		case 4:
			--x;
			break;
		case 5:
			++x;
			break;
		}

		if(event.entityLiving instanceof EntityPlayer)		{
			  
			  EntityPlayer player = (EntityPlayer) event.entityLiving;
			  //player.inventory.decrStackSize(player.inventory.currentItem, 1);
			  int newStackSize = player.inventory.mainInventory[player.inventory.currentItem].stackSize - 1;
			  
			  
			  for (int j = 0; j < MinecraftServer.getServer().worldServers.length; j++) {
				  if(player.inventory.mainInventory[player.inventory.currentItem].stackSize != newStackSize){
					  MinecraftServer.getServer().worldServers[j].getPlayerEntityByName(player.username).
					  inventory.decrStackSize(player.inventory.currentItem, 1);
					  
					  //It seems to be necessary otherwise the player wouldn't catch on fire when walking over it
					  MinecraftServer.getServer().worldServers[j].setBlock(x, y, z, Block.fire.blockID);
					  break;
				  }
			  }
		}
		event.setCanceled(true);
		System.out.println("Invalid block placed!");
	}
} catch (NullPointerException e) {
	System.out.println(e.getMessage());
}
}