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isAdd, isRemove, getAddedAmount, getRemovedAmount

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NichtStudioCode 2021-04-30 19:03:31 +02:00
parent 31ec100806
commit 1b60239b34
1 changed files with 48 additions and 0 deletions
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48
src/main/java/de/studiocode/invui/virtualinventory/event/ItemUpdateEvent.java
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@ -103,4 +103,52 @@ public class ItemUpdateEvent {
this.cancelled = cancel;
}
/**
* Calculates if the Action resulted in items being added to
* the {@link VirtualInventory}.
*
* @return If items were added to the {@link VirtualInventory}
*/
public boolean isAdd() {
if (newItemStack != null && previousItemStack != null) {
return newItemStack.getAmount() > previousItemStack.getAmount();
} else return previousItemStack == null && newItemStack != null;
}
/**
* Calculates if the action resulted in items being removed
* from the {@link VirtualInventory}.
*
* @return If items were removed from the {@link VirtualInventory}
*/
public boolean isRemove() {
if (newItemStack != null && previousItemStack != null) {
return newItemStack.getAmount() < previousItemStack.getAmount();
} else return newItemStack == null && previousItemStack != null;
}
/**
* Gets the amount of items that have been removed.
*
* @return The amount of items that have been removed
* @throws IllegalStateException when {@link #isRemove()} is false
*/
public int getRemovedAmount() {
if (!isRemove()) throw new IllegalStateException("No items have been removed");
if (newItemStack == null) return previousItemStack.getAmount();
else return previousItemStack.getAmount() - newItemStack.getAmount();
}
/**
* Gets the amount of items that have been added.
*
* @return The amount of items that have been added
* @throws IllegalStateException when {@link #isAdd()} is false
*/
public int getAddedAmount() {
if (!isAdd()) throw new IllegalStateException("No items have been added");
if (previousItemStack == null) return newItemStack.getAmount();
else return newItemStack.getAmount() - previousItemStack.getAmount();
}
}