Improved soulbound.can-drop option to support moving items around in chests, dispensers...

MMOItems-API/src/main/java/net/Indyuce/mmoitems/api/item/template/MMOItemTemplate.java

@@ -192,22 +192,16 @@ public class MMOItemTemplate implements ItemReference, PreloadedObject {
         return options.contains(option);
     }
 
-    public MMOItemBuilder newBuilder(@Nullable Player player) {
-        if (player != null) {
-            return newBuilder(PlayerData.get(player).getRPG());
-        }
-        return newBuilder((RPGPlayer) null);
-    }
-
     public MMOItemBuilder newBuilder() {
         return newBuilder((RPGPlayer) null);
     }
 
+    public MMOItemBuilder newBuilder(@Nullable Player player) {
+        return newBuilder(player == null ? null : PlayerData.get(player).getRPG());
+    }
+
     public MMOItemBuilder newBuilder(@Nullable PlayerData player) {
-        if (player != null) {
+        return newBuilder(player == null ? null : player.getRPG());
-            return newBuilder(player.getRPG());
-        }
-        return newBuilder((RPGPlayer) null);
     }
 
     /**
@@ -233,12 +227,11 @@ public class MMOItemTemplate implements ItemReference, PreloadedObject {
      * @param forDisplay Should it take modifiers into account
      * @return Item builder with random level and tier?
      */
+    @NotNull
     public MMOItemBuilder newBuilder(@Nullable RPGPlayer player, boolean forDisplay) {
 
         // No player ~ default settings
-        if (player == null) {
+        if (player == null) return newBuilder(0, null);
-            return newBuilder(0, null);
-        }
 
         // Read from player
         int itemLevel = hasOption(TemplateOption.LEVEL_ITEM) ? MMOItems.plugin.getTemplates().rollLevel(player.getLevel()) : 0;
@@ -251,6 +244,7 @@ public class MMOItemTemplate implements ItemReference, PreloadedObject {
      * @param itemTier  The desired item tier, can be null
      * @return Item builder with specific item level and tier
      */
+    @NotNull
     public MMOItemBuilder newBuilder(int itemLevel, @Nullable ItemTier itemTier) {
         return new MMOItemBuilder(this, itemLevel, itemTier);
     }

MMOItems-API/src/main/java/net/Indyuce/mmoitems/util/MMOUtils.java

@@ -36,6 +36,11 @@ public class MMOUtils {
         return particle.getDataType() == Particle.DustOptions.class;
     }
 
+    /**
+     * Optimized Soulbound check based on the fact that the
+     * compressed item Soulbound data contains only one UUID,
+     * the target player's UUID, sparing one Json parse pass.
+     */
     public static boolean isSoulboundTo(@NotNull NBTItem item, @NotNull Player player) {
         final @Nullable String foundNbt = item.getString("MMOITEMS_SOULBOUND");
         return foundNbt != null && foundNbt.contains(player.getUniqueId().toString());

MMOItems-Dist/src/main/java/net/Indyuce/mmoitems/MMOItemsBukkit.java

@@ -6,6 +6,7 @@ import net.Indyuce.mmoitems.comp.PhatLootsHook;
 import net.Indyuce.mmoitems.gui.listener.GuiListener;
 import net.Indyuce.mmoitems.listener.*;
 import net.Indyuce.mmoitems.listener.option.DroppedItems;
+import net.Indyuce.mmoitems.listener.option.SoulboundNoDrop;
 import org.bukkit.Bukkit;
 
 public class MMOItemsBukkit {
@@ -33,6 +34,9 @@ public class MMOItemsBukkit {
         if (plugin.getLanguage().disableRemovedItems)
             Bukkit.getPluginManager().registerEvents(new DisabledItemsListener(plugin), plugin);
 
+        if (!plugin.getConfig().getBoolean("soulbound.can-drop"))
+            Bukkit.getPluginManager().registerEvents(new SoulboundNoDrop(), plugin);
+
         // Profile support
         if (MythicLib.plugin.hasProfiles())
             Bukkit.getPluginManager().registerEvents(new ProfileSupportListener(), plugin);

MMOItems-Dist/src/main/java/net/Indyuce/mmoitems/listener/ItemListener.java

@@ -21,7 +21,6 @@ import org.bukkit.event.inventory.CraftItemEvent;
 import org.bukkit.event.inventory.InventoryClickEvent;
 import org.bukkit.event.inventory.InventoryType;
 import org.bukkit.event.inventory.PrepareItemCraftEvent;
-import org.bukkit.event.player.PlayerDropItemEvent;
 import org.bukkit.event.player.PlayerJoinEvent;
 import org.bukkit.inventory.CraftingInventory;
 import org.bukkit.inventory.ItemStack;
@@ -137,13 +136,6 @@ public class ItemListener implements Listener {
         if (newItem != null) event.setCurrentItem(newItem);
     }
 
-    @EventHandler(ignoreCancelled = true)
-    private void dropItem(PlayerDropItemEvent event) {
-        NBTItem nbt = NBTItem.get(event.getItemDrop().getItemStack());
-        if (!MMOItems.plugin.getConfig().getBoolean("soulbound.can-drop") && nbt.hasTag("MMOITEMS_SOULBOUND"))
-            event.setCancelled(true);
-    }
-
     @EventHandler(priority = EventPriority.MONITOR, ignoreCancelled = true)
     public void playerJoin(PlayerJoinEvent event) {
         if (!MythicLib.plugin.hasProfiles()) updateInventory(event.getPlayer());

MMOItems-Dist/src/main/java/net/Indyuce/mmoitems/listener/PlayerListener.java

@@ -81,11 +81,6 @@ public class PlayerListener implements Listener {
             final ItemStack item = iterator.next();
             final NBTItem nbt = NBTItem.get(item);
 
-            /*
-             * Not a perfect check but it's very sufficient and so we avoid
-             * using a JsonParser followed by map checkups in the SoulboundData
-             * constructor
-             */
             if (nbt.getBoolean("MMOITEMS_DISABLE_DEATH_DROP") || (MMOItems.plugin.getLanguage().keepSoulboundOnDeath && MMOUtils.isSoulboundTo(nbt, player))) {
                 iterator.remove();
                 soulboundInfo.registerItem(item);

MMOItems-Dist/src/main/java/net/Indyuce/mmoitems/listener/option/SoulboundNoDrop.java

@@ -0,0 +1,154 @@
+package net.Indyuce.mmoitems.listener.option;
+
+import io.lumine.mythic.lib.api.item.NBTItem;
+import net.Indyuce.mmoitems.util.MMOUtils;
+import org.bukkit.entity.HumanEntity;
+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.inventory.InventoryType;
+import org.bukkit.event.player.PlayerDropItemEvent;
+import org.bukkit.inventory.ItemStack;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import java.util.Map;
+
+/**
+ * Useful Resources:
+ * - <a href="https://hub.spigotmc.org/javadocs/bukkit/org/bukkit/event/inventory/InventoryAction.html">...</a>
+ * - <a href="https://hub.spigotmc.org/javadocs/bukkit/org/bukkit/event/inventory/InventoryType.html">...</a>
+ *
+ * @author Jules
+ */
+public class SoulboundNoDrop implements Listener {
+
+    @EventHandler(priority = EventPriority.LOW, ignoreCancelled = true)
+    public void cannotDrop(PlayerDropItemEvent event) {
+        if (isBound(event.getItemDrop().getItemStack(), event.getPlayer())) event.setCancelled(true);
+    }
+
+    @EventHandler(priority = EventPriority.LOW, ignoreCancelled = true)
+    public void cannotDragAround(InventoryDragEvent event) {
+
+        if (event.getView().getType() == InventoryType.CRAFTING) return;
+
+        // This easily allows to check if the item was dragged in or out of the player's inventory
+        final int topInventorySize = event.getView().getTopInventory().getContents().length;
+        for (Map.Entry<Integer, ItemStack> entry : event.getNewItems().entrySet())
+            if (entry.getKey() < topInventorySize && isBound(entry.getValue(), event.getWhoClicked())) {
+                event.setCancelled(true);
+                return;
+            }
+    }
+
+    @EventHandler(priority = EventPriority.LOW, ignoreCancelled = true)
+    public void cannotMoveAround(InventoryClickEvent event) {
+
+        // Can only move around in
+        if (event.getView().getType() == InventoryType.CRAFTING) return;
+
+        try {
+
+            // Depends on click and inventory type.
+            final boolean result = isSafe(event);
+            if (!result) event.setCancelled(true);
+        } catch (RuntimeException exception) {
+
+            // Safe check...
+            if (isBound(event.getCurrentItem(), event.getWhoClicked()) || isBound(event.getCursor(), event.getWhoClicked()))
+                event.setCancelled(true);
+        }
+    }
+
+    private boolean isSafe(@NotNull InventoryClickEvent event) {
+        switch (event.getAction()) {
+
+            /*
+             * Pickups
+             */
+            case NOTHING: // 'Nothing happens' is safe enough
+            case PICKUP_ALL: // Can pickup any item
+            case PICKUP_SOME:
+            case PICKUP_HALF:
+            case PICKUP_ONE:
+            case COLLECT_TO_CURSOR: // Considered a pickup
+            case CLONE_STACK: // (Creative) Clones currentItem into cursor. Considered a pickup
+            case HOTBAR_MOVE_AND_READD: // Some is given to the player, but not the target inventory, hence safe!
+                return true;
+
+            /*
+             * Drop cursor. Check cursor
+             */
+            case DROP_ONE_CURSOR: // Check cursor (dropped)
+            case DROP_ALL_CURSOR:
+                return !isBound(event.getCursor(), event.getWhoClicked());
+
+            /*
+             * Drop current item. Check current item
+             */
+            case DROP_ALL_SLOT: // Check current item (dropped)
+            case DROP_ONE_SLOT:
+                return !isBound(event.getCurrentItem(), event.getWhoClicked());
+
+            /*
+             * Places. Check cursor only if place is in remove inventory
+             */
+            case SWAP_WITH_CURSOR:
+            case PLACE_ALL:
+            case PLACE_SOME:
+            case PLACE_ONE: {
+
+                // Can place any item in player's inventory
+                if (event.getClickedInventory().getType() == InventoryType.PLAYER) return true;
+
+                // Only accepted if the item is not soulbound
+                return !isBound(event.getCursor(), event.getWhoClicked());
+            }
+
+            /*
+             * Swap with hotbar. Check hotbar item only if
+             * swap is done with remote inventory
+             */
+            case HOTBAR_SWAP: {
+
+                // Can place any item in player's inventory
+                if (event.getClickedInventory().getType() == InventoryType.PLAYER) return true;
+
+                // Check hotbar
+                final ItemStack hotbarItem = event.getWhoClicked().getInventory().getItem(event.getHotbarButton());
+                return !isBound(hotbarItem, event.getWhoClicked());
+            }
+
+            /*
+             * Shift click item move. Check current item only if
+             * being placed in remove inventory
+             */
+            case MOVE_TO_OTHER_INVENTORY: {
+
+                // Can move anything to player's inventory
+                if (event.getClickedInventory().getType() != InventoryType.PLAYER) return true;
+
+                // Check current item
+                return !isBound(event.getCurrentItem(), event.getWhoClicked());
+            }
+
+            /*
+             * For anything else, check both current item and cursor for safeguard.
+             * Maybe caused by 1.20.6+ inventory actions and other plugins.
+             */
+            case UNKNOWN:
+            default:
+                throw new RuntimeException("Not implemented");
+        }
+    }
+
+    private boolean isBound(@Nullable ItemStack item, @NotNull HumanEntity player) {
+        return item != null && item.hasItemMeta() && MMOUtils.isSoulboundTo(NBTItem.get(item), (Player) player);
+    }
+}
+
+

MMOItems-Dist/src/main/resources/config.yml

@@ -125,12 +125,15 @@ soulbound:
         base: 1
         per-lvl: 1
 
-    # Whether or not soulbound items should be
+    # Whether soulbound items should be
     # kept when a player dies.
     keep-on-death: true
 
-    # Whether or not soulbound item can be
+    # [Experimental feature]
-    # dropped by the player
+    # When toggled off, players cannot drop or take
+    # Soulbound items away from their inventory.
+    # Requires `keep-on-death` enabled.
+    # Changes apply on server restart.
     can-drop: true
 
 # Enable, disable, and customize the weapon effects here.