Fixed dupe bug and fixed normal hoppers.

src/main/java/com/songoda/epichoppers/gui/GUIAutoSellFilter.java

@@ -36,7 +36,10 @@ public class GUIAutoSellFilter extends CustomizableGui {
         setDefaultItem(null);
         setAcceptsItems(true);
 
-        setOnClose((event) -> compile());
+        setOnClose((event) -> {
+            hopper.setActivePlayer(null);
+            compile();
+        });
 
         Filter filter = hopper.getFilter();
 

src/main/java/com/songoda/epichoppers/gui/GUICrafting.java

@@ -18,7 +18,10 @@ public class GUICrafting extends CustomizableGui {
         super(EpicHoppers.getInstance(), "crafting");
         setRows(3);
         setTitle(Methods.formatName(hopper.getLevel().getLevel()) + TextUtils.formatText(" &8-&f Crafting"));
-        setOnClose((event) -> setItem(module, hopper, player));
+        setOnClose((event) -> {
+            hopper.setActivePlayer(null);
+            setItem(module, hopper, player);
+        });
         setAcceptsItems(true);
 
         ItemStack glass1 = GuiUtils.getBorderItem(Settings.GLASS_TYPE_1.getMaterial());

src/main/java/com/songoda/epichoppers/gui/GUIFilter.java

@@ -37,7 +37,10 @@ public class GUIFilter extends CustomizableGui {
         setDefaultItem(null);
         setAcceptsItems(true);
 
-        setOnClose((event) -> compile());
+        setOnClose((event) -> {
+            hopper.setActivePlayer(null);
+            compile();
+        });
 
         Filter filter = hopper.getFilter();
 

src/main/java/com/songoda/epichoppers/gui/GUIOverview.java

@@ -46,7 +46,10 @@ public class GUIOverview extends CustomizableGui {
         setTitle(Methods.formatName(hopper.getLevel().getLevel()));
         runTask();
         constructGUI();
-        this.setOnClose(action -> Bukkit.getScheduler().cancelTask(task));
+        this.setOnClose(action -> {
+            hopper.setActivePlayer(null);
+            Bukkit.getScheduler().cancelTask(task);
+        });
     }
 
     private void constructGUI() {
@@ -212,7 +215,10 @@ public class GUIOverview extends CustomizableGui {
                         });
                 canTeleport = false;
             } else if (canFilter) {
-                setButton("filter", slot, filter, (event) -> guiManager.showGUI(player, new GUIFilter(plugin, hopper, player)));
+                setButton("filter", slot, filter, (event) -> {
+                    hopper.setActivePlayer(player);
+                    guiManager.showGUI(player, new GUIFilter(plugin, hopper, player));
+                });
                 canFilter = false;
             } else {
                 if (modules.isEmpty()) break;

src/main/java/com/songoda/epichoppers/gui/GUISmeltable.java

@@ -41,6 +41,8 @@ public class GUISmeltable extends CustomizableGui {
 
         this.setOnPage((event) -> showPage());
         showPage();
+
+        this.setOnClose((event) -> hopper.setActivePlayer(null));
     }
 
     void showPage() {

src/main/java/com/songoda/epichoppers/hopper/Hopper.java

@@ -44,6 +44,8 @@ public class Hopper {
 
     private int syncId = -1;
 
+    private Player activePlayer;
+
     private final Map<String, Object> moduleCache = new HashMap<>();
 
     public Hopper(Location location) {
@@ -67,9 +69,16 @@ public class Hopper {
 
         EpicHoppers instance = EpicHoppers.getInstance();
         if (!player.hasPermission("epichoppers.overview")) return;
+
+        setActivePlayer(player);
         guiManager.showGUI(player, new GUIOverview(instance, this, player));
     }
 
+    public void forceClose() {
+        if (activePlayer != null)
+            activePlayer.closeInventory();
+    }
+
     public void upgrade(Player player, CostType type) {
         EpicHoppers plugin = EpicHoppers.getInstance();
         if (!plugin.getLevelManager().getLevels().containsKey(this.level.getLevel() + 1)) return;
@@ -327,4 +336,12 @@ public class Hopper {
     public void setId(int id) {
         this.id = id;
     }
+
+    public Player getActivePlayer() {
+        return activePlayer;
+    }
+
+    public void setActivePlayer(Player activePlayer) {
+        this.activePlayer = activePlayer;
+    }
 }

src/main/java/com/songoda/epichoppers/hopper/levels/modules/ModuleAutoCrafting.java

@@ -195,6 +195,7 @@ public class ModuleAutoCrafting extends Module {
 
     @Override
     public void runButtonPress(Player player, Hopper hopper, ClickType type) {
+        hopper.setActivePlayer(player);
         EpicHoppers.getInstance().getGuiManager().showGUI(player, new GUICrafting(this, hopper, player));
     }
 

src/main/java/com/songoda/epichoppers/hopper/levels/modules/ModuleAutoSell.java

@@ -145,6 +145,7 @@ public class ModuleAutoSell extends Module {
             setNotifying(hopper, !isNotifying(hopper));
         } else if (type == ClickType.SHIFT_LEFT || type == ClickType.SHIFT_RIGHT) {
             // Any shift click opens AutoSell filter configuration GUI
+            hopper.setActivePlayer(player);
             EpicHoppers.getInstance().getGuiManager().showGUI(player, new GUIAutoSellFilter(EpicHoppers.getInstance(), hopper));
         }
     }

src/main/java/com/songoda/epichoppers/hopper/levels/modules/ModuleAutoSmelter.java

@@ -89,9 +89,10 @@ public class ModuleAutoSmelter extends Module {
     }
 
     public void runButtonPress(Player player, Hopper hopper, ClickType type) {
-        if (type == ClickType.LEFT)
+        if (type == ClickType.LEFT) {
+            hopper.setActivePlayer(player);
             EpicHoppers.getInstance().getGuiManager().showGUI(player, new GUISmeltable(this, plugin, hopper));
-        else if (type == ClickType.RIGHT)
+        } else if (type == ClickType.RIGHT)
             toggleEnabled(hopper);
     }
 

src/main/java/com/songoda/epichoppers/listeners/BlockListeners.java

@@ -105,6 +105,8 @@ public class BlockListeners implements Listener {
             event.getBlock().getLocation().getWorld().dropItemNaturally(event.getBlock().getLocation(), item);
         }
 
+        hopper.forceClose();
+
         hopper.getFilter().getWhiteList().stream()
                 .filter(m -> m != null)
                 .forEach(m -> event.getBlock().getWorld().dropItemNaturally(event.getBlock().getLocation(), m));

src/main/java/com/songoda/epichoppers/listeners/InteractListeners.java

@@ -80,8 +80,13 @@ public class InteractListeners implements Listener {
                     return;
         }
 
+        if (!instance.getHopperManager().isHopper(event.getClickedBlock().getLocation())) {
+            return;
+        }
+
         PlayerData playerData = instance.getPlayerDataManager().getPlayerData(player);
 
+
         if (playerData.getSyncType() == null) {
             if (event.getClickedBlock().getType() == Material.HOPPER) {
                 if (Settings.ALLOW_NORMAL_HOPPERS.getBoolean() && !instance.getHopperManager().isHopper(event.getClickedBlock().getLocation()))