From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Martijn Muijsers <martijnmuijsers@live.nl>
Date: Mon, 26 Dec 2022 02:11:29 +0100
Subject: [PATCH] Make book writing configurable

License: GPL-3.0 (https://www.gnu.org/licenses/gpl-3.0.html)
Gale - https://galemc.org

This patch is based on the following patch:
"Add option to disable books"
By: Kevin Raneri <kevin.raneri@gmail.com>
As part of: Pufferfish (https://github.com/pufferfish-gg/Pufferfish)
Licensed under: GPL-3.0 (https://www.gnu.org/licenses/gpl-3.0.html)

* Pufferfish description *

Books are commonly the target of duping-related exploits. If you
anticipate that your server will be an early target of duping attacks in
the event that new exploits are found, you may want to consider removing
the ability for non-privileged players to edit books. This patch allows
you to easily disable books, should you want to preemptively remove this
functionality before additional exploits are found.

diff --git a/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java b/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
index 547cc76d2086a658cbf667dcd6e47227a0a26b7b..92fc01fb38130fc9c77e47e4b1db99f892d5459f 100644
--- a/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
+++ b/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
@@ -182,6 +182,8 @@ import net.minecraft.world.phys.Vec3;
 import net.minecraft.world.phys.shapes.BooleanOp;
 import net.minecraft.world.phys.shapes.Shapes;
 import net.minecraft.world.phys.shapes.VoxelShape;
+import org.bukkit.craftbukkit.util.permissions.CraftDefaultPermissions;
+import org.galemc.gale.configuration.GaleGlobalConfiguration;
 import org.slf4j.Logger;
 
 // CraftBukkit start
@@ -1202,6 +1204,11 @@ public class ServerGamePacketListenerImpl implements ServerPlayerConnection, Tic
 
     @Override
     public void handleEditBook(ServerboundEditBookPacket packet) {
+        // Gale start - Pufferfish - make book writing configurable
+        if (!(GaleGlobalConfiguration.get().gameplayMechanics.enableBookWriting || this.player.getBukkitEntity().hasPermission(CraftDefaultPermissions.writeBooks) || this.player.getBukkitEntity().hasPermission("pufferfish.usebooks"))) {
+            return;
+        }
+        // Gale end - Pufferfish - make book writing configurable
         // Paper start
         if (!this.cserver.isPrimaryThread()) {
             List<String> pageList = packet.getPages();
diff --git a/src/main/java/org/bukkit/craftbukkit/util/permissions/CraftDefaultPermissions.java b/src/main/java/org/bukkit/craftbukkit/util/permissions/CraftDefaultPermissions.java
index 2e23147f807c6620b54d3047fe24a3847900712c..9ae9eff03fa9b240ed736eaa97fee0da7168c41d 100644
--- a/src/main/java/org/bukkit/craftbukkit/util/permissions/CraftDefaultPermissions.java
+++ b/src/main/java/org/bukkit/craftbukkit/util/permissions/CraftDefaultPermissions.java
@@ -7,6 +7,8 @@ public final class CraftDefaultPermissions {
     private static final String ROOT = "minecraft";
     public static final String GALE_ROOT = "gale"; // Gale - set Gale permissions root
 
+    public static final String writeBooks = GALE_ROOT + ".writebooks"; // Gale - Pufferfish - make book writing configurable
+
     private CraftDefaultPermissions() {}
 
     public static void registerCorePermissions() {
@@ -19,6 +21,7 @@ public final class CraftDefaultPermissions {
         DefaultPermissions.registerPermission(CraftDefaultPermissions.ROOT + ".debugstick.always", "Gives the user the ability to use the debug stick in all game modes", org.bukkit.permissions.PermissionDefault.FALSE/* , parent */); // Paper - should not have this parent, as it's not a "vanilla" utility
         DefaultPermissions.registerPermission(CraftDefaultPermissions.ROOT + ".commandblock", "Gives the user the ability to use command blocks.", org.bukkit.permissions.PermissionDefault.OP, parent); // Paper
         // Spigot end
+        DefaultPermissions.registerPermission(writeBooks, "Gives the user the ability to write books even when writing books is disabled in the Gale configuration", org.bukkit.permissions.PermissionDefault.OP); // Gale - Pufferfish - make book writing configurable
         parent.recalculatePermissibles();
     }
 }
diff --git a/src/main/java/org/galemc/gale/configuration/GaleGlobalConfiguration.java b/src/main/java/org/galemc/gale/configuration/GaleGlobalConfiguration.java
index 5ade5d2ff3a68cf9e0240fc86e4b63432cb899c0..be4e05851e94f943b6382ba5bb9f0750c95bdad4 100644
--- a/src/main/java/org/galemc/gale/configuration/GaleGlobalConfiguration.java
+++ b/src/main/java/org/galemc/gale/configuration/GaleGlobalConfiguration.java
@@ -35,6 +35,25 @@ public class GaleGlobalConfiguration extends ConfigurationPart {
 
     }
 
+    public GameplayMechanics gameplayMechanics;
+    public class GameplayMechanics extends ConfigurationPart {
+
+        // Gale start - Pufferfish - make book writing configurable
+        /**
+         * Whether books should be writeable.
+         * Servers that anticipate being a target for duping may want to consider disabling this option.
+         * <br>
+         * If set to false, players with the permission {@code gale.writebooks} can still use books.
+         * <ul>
+         *     <li><i>Default</i>: true</li>
+         *     <li><i>Vanilla</i>: true</li>
+         * </ul>
+         */
+        public boolean enableBookWriting = true;
+        // Gale end - Pufferfish - make book writing configurable
+
+    }
+
     public Misc misc;
     public class Misc extends ConfigurationPart {