Add flag that prevents people from copying NBT data in the plot unless they're added as members

Bukkit/src/main/java/com/plotsquared/bukkit/listener/PlayerEvents.java

@@ -79,6 +79,7 @@ import com.plotsquared.core.plot.flag.implementations.MobPlaceFlag;
 import com.plotsquared.core.plot.flag.implementations.MycelGrowFlag;
 import com.plotsquared.core.plot.flag.implementations.PlaceFlag;
 import com.plotsquared.core.plot.flag.implementations.PlayerInteractFlag;
+import com.plotsquared.core.plot.flag.implementations.PreventCreativeCopyFlag;
 import com.plotsquared.core.plot.flag.implementations.PveFlag;
 import com.plotsquared.core.plot.flag.implementations.PvpFlag;
 import com.plotsquared.core.plot.flag.implementations.RedstoneFlag;
@@ -173,6 +174,7 @@ import org.bukkit.event.entity.ProjectileHitEvent;
 import org.bukkit.event.entity.ProjectileLaunchEvent;
 import org.bukkit.event.hanging.HangingBreakByEntityEvent;
 import org.bukkit.event.hanging.HangingPlaceEvent;
+import org.bukkit.event.inventory.ClickType;
 import org.bukkit.event.inventory.InventoryClickEvent;
 import org.bukkit.event.inventory.InventoryCloseEvent;
 import org.bukkit.event.player.AsyncPlayerChatEvent;
@@ -1677,6 +1679,19 @@ public class PlayerEvents extends PlotListener implements Listener {
         ItemStack newItem = event.getCursor();
         ItemMeta newMeta = newItem.getItemMeta();
         ItemMeta oldMeta = newItem.getItemMeta();
+
+        if (event.getClick() == ClickType.CREATIVE) {
+            final Plot plot = pp.getCurrentPlot();
+            if (plot != null &&
+                plot.getFlag(PreventCreativeCopyFlag.class) &&
+                !plot.isAdded(player.getUniqueId()) &&
+                !Permissions.hasPermission(pp, Captions.PERMISSION_ADMIN_INTERACT_OTHER)) {
+                final ItemStack newStack = new ItemStack(newItem.getType(), newItem.getAmount());
+                event.setCursor(newStack);
+            }
+            return;
+        }
+
         String newLore = "";
         if (newMeta != null) {
             List<String> lore = newMeta.getLore();

Core/src/main/java/com/plotsquared/core/configuration/Captions.java

@@ -675,6 +675,7 @@ public enum Captions implements Caption {
     FLAG_DESCRIPTION_BLOCKED_CMDS("A list of commands that are blocked in the plot.", "Flags"),
     FLAG_DESCRIPTION_KEEP("Prevents the plot from expiring. Can be set to: true, false, the number of milliseconds to keep the plot for or a timestamp (3w 2d 5h).", "Flags"),
     FLAG_DESCRIPTION_KEEP_INVENTORY("Prevents players from dropping their items when they die inside of the plot.", "Flags"),
+    FLAG_DESCRIPTION_PREVENT_CREATIVE_COPY("Prevents people from copying item NBT data in the plot unless they're added as members.", "Flags"),
     //</editor-fold>
     //<editor-fold desc="Flag category errors">
     FLAG_ERROR_BOOLEAN("Flag value must be a boolean (true|false)", false, "Flags"),

Core/src/main/java/com/plotsquared/core/plot/flag/GlobalFlagContainer.java

@@ -82,6 +82,7 @@ import com.plotsquared.core.plot.flag.implementations.NotifyEnterFlag;
 import com.plotsquared.core.plot.flag.implementations.NotifyLeaveFlag;
 import com.plotsquared.core.plot.flag.implementations.PlaceFlag;
 import com.plotsquared.core.plot.flag.implementations.PlayerInteractFlag;
+import com.plotsquared.core.plot.flag.implementations.PreventCreativeCopyFlag;
 import com.plotsquared.core.plot.flag.implementations.PriceFlag;
 import com.plotsquared.core.plot.flag.implementations.PveFlag;
 import com.plotsquared.core.plot.flag.implementations.PvpFlag;
@@ -178,6 +179,7 @@ public final class GlobalFlagContainer extends FlagContainer {
         this.addFlag(MiscPlaceFlag.MISC_PLACE_FALSE);
         this.addFlag(MiscInteractFlag.MISC_INTERACT_FALSE);
         this.addFlag(KeepInventoryFlag.KEEP_INVENTORY_FALSE);
+        this.addFlag(PreventCreativeCopyFlag.PREVENT_CREATIVE_COPY_FALSE);
 
         // Enum Flags
         this.addFlag(WeatherFlag.PLOT_WEATHER_FLAG_OFF);

Core/src/main/java/com/plotsquared/core/plot/flag/implementations/PreventCreativeCopyFlag.java

@@ -0,0 +1,45 @@
+/*
+ *       _____  _       _    _____                                _
+ *      |  __ \| |     | |  / ____|                              | |
+ *      | |__) | | ___ | |_| (___   __ _ _   _  __ _ _ __ ___  __| |
+ *      |  ___/| |/ _ \| __|\___ \ / _` | | | |/ _` | '__/ _ \/ _` |
+ *      | |    | | (_) | |_ ____) | (_| | |_| | (_| | | |  __/ (_| |
+ *      |_|    |_|\___/ \__|_____/ \__, |\__,_|\__,_|_|  \___|\__,_|
+ *                                    | |
+ *                                    |_|
+ *            PlotSquared plot management system for Minecraft
+ *                  Copyright (C) 2020 IntellectualSites
+ *
+ *     This program is free software: you can redistribute it and/or modify
+ *     it under the terms of the GNU General Public License as published by
+ *     the Free Software Foundation, either version 3 of the License, or
+ *     (at your option) any later version.
+ *
+ *     This program is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *     GNU General Public License for more details.
+ *
+ *     You should have received a copy of the GNU General Public License
+ *     along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+package com.plotsquared.core.plot.flag.implementations;
+
+import com.plotsquared.core.configuration.Captions;
+import com.plotsquared.core.plot.flag.types.BooleanFlag;
+import org.jetbrains.annotations.NotNull;
+
+public class PreventCreativeCopyFlag extends BooleanFlag<PreventCreativeCopyFlag> {
+
+    public static final PreventCreativeCopyFlag PREVENT_CREATIVE_COPY_TRUE  = new PreventCreativeCopyFlag(true);
+    public static final PreventCreativeCopyFlag PREVENT_CREATIVE_COPY_FALSE = new PreventCreativeCopyFlag(false);
+
+    private PreventCreativeCopyFlag(@NotNull final Boolean value) {
+        super(value, Captions.FLAG_DESCRIPTION_PREVENT_CREATIVE_COPY);
+    }
+
+    @Override protected PreventCreativeCopyFlag flagOf(@NotNull final Boolean value) {
+        return value ? PREVENT_CREATIVE_COPY_TRUE : PREVENT_CREATIVE_COPY_FALSE;
+    }
+
+}