So, I am relatively new to Forge modding... bear with me please

 

I'm wondering how to check if a player as x amount of an item, then remove x amount of that item from their inventory.

any help would be appreciated. thank you.

 

EDIT: I know there is the consumeInventoryItem but that is only 1 at a time. is there a way to do more than 1?

Well:

int count = 0;
for (int i; i < 36; ++i)
{
    ItemStack stack = player.inventory.mainInventory[i];
    if (stack != null && stack.getItem() == Item.someItem) count += stack.stackSize;
}
if (count >= requiredToRemove)
{
    int i = 0;
    while (requiredToRemove > 0)
    {
        ItemStack stack = player.inventory.mainInventory[i];
        if (stack != null && stack.getItem() == Item.someItem)
        {
            if (requiredToRemove >= stack.stackSize) player.inventory.mainInventory[i] = null;
            else stack.stackSize -= requiredToRemove;
            requiredToRemove -= stack.stackSize;
        }
        ++i;
}

 

Something like this. Wrote it here so probably forgot something. This can be done better.

It's something to work with, thanks for the help, I'll see what I can do with it.

 

Well:

int count = 0;
for (int i; i < 36; ++i)
{
    ItemStack stack = player.inventory.mainInventory[i];
    if (stack != null && stack.getItem() == Item.someItem) count += stack.stackSize;
}
if (count >= requiredToRemove)
{
    int i = 0;
    while (requiredToRemove > 0)
    {
        ItemStack stack = player.inventory.mainInventory[i];
        if (stack != null && stack.getItem() == Item.someItem)
        {
            if (requiredToRemove >= stack.stackSize) player.inventory.mainInventory[i] = null;
            else stack.stackSize -= requiredToRemove;
            requiredToRemove -= stack.stackSize;
        }
        ++i;
}

 

Something like this. Wrote it here so probably forgot something. This can be done better.