Improved handling for invalid (used/duped) coupons.

ERCoupons/src/com/entryrise/coupons/Data.java

@@ -152,7 +152,7 @@ public class Data {
 
 		long credits = data.getLong(loc, -1);
 		PlayerInventory pinv = p.getInventory();
-		if (credits == -1L) {
+		if (credits == -1) {
 			for (int i = 0; i < pinv.getSize(); ++i) {
 				final ItemStack itm = pinv.getItem(i);
 				if (itm != null) {

ERCoupons/src/com/entryrise/coupons/listeners/CouponListener.java

@@ -4,43 +4,51 @@
 
 package com.entryrise.coupons.listeners;
 
-import org.bukkit.event.inventory.InventoryDragEvent;
-import org.bukkit.event.inventory.InventoryClickEvent;
-import org.bukkit.event.EventPriority;
+import org.bukkit.entity.Player;
 import org.bukkit.event.EventHandler;
+import org.bukkit.event.EventPriority;
+import org.bukkit.event.Listener;
+import org.bukkit.event.inventory.InventoryClickEvent;
+import org.bukkit.event.inventory.InventoryDragEvent;
+import org.bukkit.event.player.PlayerDropItemEvent;
+import org.bukkit.event.player.PlayerInteractEvent;
 import org.bukkit.inventory.ItemStack;
-import org.bukkit.entity.Player;
+
 import com.entryrise.coupons.Data;
-import org.bukkit.event.block.Action;
-import org.bukkit.event.player.PlayerInteractEvent;
-import org.bukkit.event.Listener;
 
-public class CouponListener implements Listener
-{
+public class CouponListener implements Listener {
 	@EventHandler(priority = EventPriority.HIGHEST)
-    public void onCouponInteract(final PlayerInteractEvent e) {
+	public void onCouponInteract(PlayerInteractEvent e) {
 		final Player p = e.getPlayer();
 		final ItemStack itm = e.getItem();
-        if (e.getAction() != Action.RIGHT_CLICK_AIR) {
+		if (e.getAction().toString().contains("RIGHT_CLICK")) {
+			e.setCancelled(true);
 			return;
 		}
 		Data.couponAction(p, itm, true);
 	}
 
 	@EventHandler(priority = EventPriority.HIGHEST, ignoreCancelled = true)
-    public void onGUIClick(final InventoryClickEvent e) {
-        final Player p = (Player)e.getWhoClicked();
+	public void onGUIClick(InventoryClickEvent e) {
+		final Player p = (Player) e.getWhoClicked();
 		final ItemStack itm = e.getCurrentItem();
 		Data.couponAction(p, itm, false);
 	}
 
 	@EventHandler(priority = EventPriority.HIGHEST, ignoreCancelled = true)
-    public void onGUIDrag(final InventoryDragEvent e) {
-        final Player p = (Player)e.getWhoClicked();
+	public void onGUIDrag(InventoryDragEvent e) {
+		final Player p = (Player) e.getWhoClicked();
 		final ItemStack itm = e.getOldCursor();
 		if (Data.couponAction(p, itm, false)) {
 			e.setCancelled(true);
-            e.setCursor((ItemStack)null);
+			e.setCursor((ItemStack) null);
+		}
+	}
+
+	@EventHandler(priority = EventPriority.HIGHEST, ignoreCancelled = true)
+	public void onGUIDrag(PlayerDropItemEvent e) {
+		if (Data.couponAction(e.getPlayer(), e.getItemDrop().getItemStack(), false)) {
+			e.getItemDrop().remove();
 		}
 	}
 }