Version 1.5.3-pre1:

* Prevent moving items to/from invsee gui
* Barrier item in invsee gui now closes gui when clicked

pom.xml

@@ -3,7 +3,7 @@
     <modelVersion>4.0.0</modelVersion>
     <groupId>com.pretzel.dev</groupId>
     <artifactId>VillagerTradeLimiter</artifactId>
-    <version>1.5.2</version>
+    <version>1.5.3</version>
 
     <properties>
         <java.version>1.8</java.version>
@@ -46,7 +46,7 @@
         <dependency>
             <groupId>mysql</groupId>
             <artifactId>mysql-connector-java</artifactId>
-            <version>8.0.27</version>
+            <version>8.0.28</version>
             <scope>provided</scope>
         </dependency>
         <dependency>

src/com/pretzel/dev/villagertradelimiter/VillagerTradeLimiter.java

@@ -15,6 +15,7 @@ import com.pretzel.dev.villagertradelimiter.settings.Settings;
 import org.bukkit.ChatColor;
 import org.bukkit.configuration.file.FileConfiguration;
 import org.bukkit.configuration.file.YamlConfiguration;
+import org.bukkit.inventory.ItemStack;
 import org.bukkit.plugin.java.JavaPlugin;
 
 import java.io.File;
@@ -117,4 +118,7 @@ public class VillagerTradeLimiter extends JavaPlugin {
 
     /** Returns a player's data container */
     public HashMap<UUID, PlayerData> getPlayerData() { return this.playerData; }
+
+    /** Returns the invsee inventory's barrier block */
+    public ItemStack getBarrier() { return this.commandManager.getBarrier(); }
 }

src/com/pretzel/dev/villagertradelimiter/commands/CommandManager.java

@@ -19,10 +19,18 @@ import java.util.Arrays;
 
 public class CommandManager {
     private final VillagerTradeLimiter instance;
+    private final ItemStack barrier;
 
     /** @param instance The instance of VillagerTradeLimiter.java */
     public CommandManager(final VillagerTradeLimiter instance) {
         this.instance = instance;
+        this.barrier = new ItemStack(Material.BARRIER, 1);
+        ItemMeta meta = barrier.getItemMeta();
+        if(meta != null) {
+            meta.setDisplayName(ChatColor.RED+"Close");
+            meta.setLore(Arrays.asList(ChatColor.GRAY+"Click to close", ChatColor.GRAY+"this inventory."));
+        }
+        barrier.setItemMeta(meta);
     }
 
     /** @return The root command node, to be registered by the plugin */
@@ -53,10 +61,7 @@ public class CommandManager {
 
             //Get the closest villager. If a nearby villager wasn't found, send the player an error message
             Entity closestEntity = getClosestEntity(p);
-            if(closestEntity == null) {
-                Util.sendMsg(instance.getLang("see.novillager"), p);
-                return;
-            }
+            if(closestEntity == null) return;
 
             //Gets the other player by name, using the first argument of the command
             OfflinePlayer otherPlayer = Bukkit.getOfflinePlayer(args[0]);
@@ -80,10 +85,7 @@ public class CommandManager {
 
             //Get the closest villager. If a nearby villager wasn't found, send the player an error message
             Entity closestEntity = getClosestEntity(p);
-            if(closestEntity == null) {
-                Util.sendMsg(instance.getLang("see.novillager"), p);
-                return;
-            }
+            if(closestEntity == null) return;
 
             //Open the villager's inventory view for the calling player
             final Villager closestVillager = (Villager)closestEntity;
@@ -92,7 +94,7 @@ public class CommandManager {
                 if(item == null) continue;
                 inventory.addItem(item.clone());
             }
-            inventory.setItem(8, getBarrier());
+            inventory.setItem(8, barrier);
             p.openInventory(inventory);
         }));
         return cmd;
@@ -117,6 +119,9 @@ public class CommandManager {
                 }
             }
         }
+        if(closestEntity == null) {
+            Util.sendMsg(instance.getLang("see.novillager"), player);
+        }
         return closestEntity;
     }
 
@@ -140,15 +145,8 @@ public class CommandManager {
         }
     }
 
-    /** @return A custom barrier block to show players villagers only have 8 inventory slots */
-    private ItemStack getBarrier() {
-        ItemStack barrier =  new ItemStack(Material.BARRIER, 1);
-        ItemMeta meta = barrier.getItemMeta();
-        if(meta != null) {
-            meta.setDisplayName(ChatColor.RED+"N/A");
-            meta.setLore(Arrays.asList(ChatColor.GRAY+"Villagers only have", ChatColor.GRAY+"8 inventory slots!"));
-        }
-        barrier.setItemMeta(meta);
-        return barrier;
+    /** @return The barrier item */
+    public ItemStack getBarrier() {
+        return this.barrier;
     }
 }

src/com/pretzel/dev/villagertradelimiter/listeners/InventoryListener.java

@@ -35,6 +35,23 @@ public class InventoryListener implements Listener {
         this.settings = settings;
     }
 
+    /** Handles when a player clicks in an inventory window */
+    @EventHandler
+    public void onPlayerClickInventory(final InventoryClickEvent event) {
+        if(event.getInventory().getType() != InventoryType.CHEST) return;
+        if(event.getInventory().getSize() != 9) return;
+        if(!(event.getWhoClicked() instanceof Player)) return;
+        if(settings.shouldSkipNPC(event.getWhoClicked())) return; //Skips NPCs
+        ItemStack barrier = event.getInventory().getItem(8);
+        if(barrier == null || !barrier.isSimilar(instance.getBarrier())) return;
+
+        //If the inventory matches the invsee inventory, cancel click events
+        event.setCancelled(true);
+        if(event.getCurrentItem() != null && event.getCurrentItem().isSimilar(instance.getBarrier())) {
+            Bukkit.getScheduler().runTaskLater(instance, () -> event.getWhoClicked().closeInventory(), 0L);
+        }
+    }
+
     /** Handles when a player stops trading with a villager */
     @EventHandler
     public void onPlayerStopTrading(final InventoryCloseEvent event) {

src/main/resources/plugin.yml

@@ -1,7 +1,7 @@
 name: VillagerTradeLimiter
 author: PretzelJohn
 main: com.pretzel.dev.villagertradelimiter.VillagerTradeLimiter
-version: 1.5.2
+version: 1.5.3
 api-version: 1.14
 
 commands: