Add InventoryPreMoveItemEvent

sparklypaper-api/src/main/java/net/sparklypower/sparklypaper/event/inventory/InventoryPreMoveItemEvent.java

@@ -0,0 +1,85 @@
+package net.sparklypower.sparklypaper.event.inventory;
+
+import org.bukkit.event.Cancellable;
+import org.bukkit.event.Event;
+import org.bukkit.event.HandlerList;
+import org.bukkit.inventory.Inventory;
+import org.jetbrains.annotations.ApiStatus;
+import org.jetbrains.annotations.NotNull;
+
+/**
+ * Called when some entity or block (e.g. hopper) tries to move items directly
+ * from one inventory to another.
+ * <p>
+ * This event is called before InventoryMoveItemEvent, and is called before the
+ * item within the container is modified to match the pull/push stack count.
+ */
+public class InventoryPreMoveItemEvent extends Event implements Cancellable {
+
+    private static final HandlerList HANDLER_LIST = new HandlerList();
+
+    private final Inventory sourceInventory;
+    private final Inventory destinationInventory;
+    private final boolean didSourceInitiate;
+
+    private boolean cancelled;
+
+    @ApiStatus.Internal
+    public InventoryPreMoveItemEvent(@NotNull final Inventory sourceInventory, @NotNull final Inventory destinationInventory, final boolean didSourceInitiate) {
+        this.sourceInventory = sourceInventory;
+        this.destinationInventory = destinationInventory;
+        this.didSourceInitiate = didSourceInitiate;
+    }
+
+    /**
+     * Gets the Inventory that the ItemStack is being taken from
+     *
+     * @return Inventory that the ItemStack is being taken from
+     */
+    @NotNull
+    public Inventory getSource() {
+        return this.sourceInventory;
+    }
+
+    /**
+     * Gets the Inventory that the ItemStack is being put into
+     *
+     * @return Inventory that the ItemStack is being put into
+     */
+    @NotNull
+    public Inventory getDestination() {
+        return this.destinationInventory;
+    }
+
+    /**
+     * Gets the Inventory that initiated the transfer. This will always be
+     * either the destination or source Inventory.
+     *
+     * @return Inventory that initiated the transfer
+     */
+    @NotNull
+    public Inventory getInitiator() {
+        return this.didSourceInitiate ? this.sourceInventory : this.destinationInventory;
+    }
+
+    @Override
+    public boolean isCancelled() {
+        return this.cancelled;
+    }
+
+    @Override
+    public void setCancelled(boolean cancel) {
+        this.cancelled = cancel;
+    }
+
+    @NotNull
+    @Override
+    public HandlerList getHandlers() {
+        return HANDLER_LIST;
+    }
+
+    @NotNull
+    public static HandlerList getHandlerList() {
+        return HANDLER_LIST;
+    }
+}