Add a keep-inventory flag

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

@@ -68,6 +68,7 @@ import com.plotsquared.core.plot.flag.implementations.IceMeltFlag;
 import com.plotsquared.core.plot.flag.implementations.InstabreakFlag;
 import com.plotsquared.core.plot.flag.implementations.InvincibleFlag;
 import com.plotsquared.core.plot.flag.implementations.ItemDropFlag;
+import com.plotsquared.core.plot.flag.implementations.KeepInventoryFlag;
 import com.plotsquared.core.plot.flag.implementations.KelpGrowFlag;
 import com.plotsquared.core.plot.flag.implementations.LiquidFlowFlag;
 import com.plotsquared.core.plot.flag.implementations.MiscBreakFlag;
@@ -166,6 +167,7 @@ import org.bukkit.event.entity.EntityExplodeEvent;
 import org.bukkit.event.entity.EntityPickupItemEvent;
 import org.bukkit.event.entity.ExplosionPrimeEvent;
 import org.bukkit.event.entity.LingeringPotionSplashEvent;
+import org.bukkit.event.entity.PlayerDeathEvent;
 import org.bukkit.event.entity.PotionSplashEvent;
 import org.bukkit.event.entity.ProjectileHitEvent;
 import org.bukkit.event.entity.ProjectileLaunchEvent;
@@ -2991,4 +2993,12 @@ public class PlayerEvents extends PlotListener implements Listener {
         }
     }
 
+
+    @EventHandler public void onDeath(final PlayerDeathEvent event) {
+        final Plot plot = BukkitUtil.getPlayer(event.getEntity()).getCurrentPlot();
+        if (plot != null && plot.getFlag(KeepInventoryFlag.class)) {
+            event.setKeepInventory(true);
+        }
+    }
+
 }

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

@@ -667,6 +667,7 @@ public enum Captions implements Caption {
     FLAG_DESCRIPTION_GUEST_GAMEMODE("Determines the guest gamemode in the plot.", "Flags"),
     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"),
     //</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

@@ -65,6 +65,7 @@ import com.plotsquared.core.plot.flag.implementations.InstabreakFlag;
 import com.plotsquared.core.plot.flag.implementations.InvincibleFlag;
 import com.plotsquared.core.plot.flag.implementations.ItemDropFlag;
 import com.plotsquared.core.plot.flag.implementations.KeepFlag;
+import com.plotsquared.core.plot.flag.implementations.KeepInventoryFlag;
 import com.plotsquared.core.plot.flag.implementations.KelpGrowFlag;
 import com.plotsquared.core.plot.flag.implementations.LiquidFlowFlag;
 import com.plotsquared.core.plot.flag.implementations.MiscBreakFlag;
@@ -176,6 +177,7 @@ public final class GlobalFlagContainer extends FlagContainer {
         this.addFlag(ChatFlag.CHAT_FLAG_TRUE);
         this.addFlag(MiscPlaceFlag.MISC_PLACE_FALSE);
         this.addFlag(MiscInteractFlag.MISC_INTERACT_FALSE);
+        this.addFlag(KeepInventoryFlag.KEEP_INVENTORY_FALSE);
 
         // Enum Flags
         this.addFlag(WeatherFlag.PLOT_WEATHER_FLAG_OFF);

Core/src/main/java/com/plotsquared/core/plot/flag/implementations/KeepInventoryFlag.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 KeepInventoryFlag extends BooleanFlag<KeepInventoryFlag> {
+
+    public static final KeepInventoryFlag KEEP_INVENTORY_TRUE  = new KeepInventoryFlag(true);
+    public static final KeepInventoryFlag KEEP_INVENTORY_FALSE = new KeepInventoryFlag(false);
+
+    private KeepInventoryFlag(final boolean value) {
+        super(value, Captions.FLAG_DESCRIPTION_KEEP_INVENTORY);
+    }
+
+    @Override protected KeepInventoryFlag flagOf(@NotNull final Boolean value) {
+        return value ? KEEP_INVENTORY_TRUE : KEEP_INVENTORY_FALSE;
+    }
+
+}