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 b13057c0792067cc6b0abdf0d64a9be2cc9389a4..6fad8731eb2aebefddbcc734bd29eb215423d85d 100644
--- a/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
+++ b/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
@@ -193,6 +193,8 @@ 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
@@ -1157,6 +1159,11 @@ public class ServerGamePacketListenerImpl extends ServerCommonPacketListenerImpl
 
     @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 - Book size limits
         final io.papermc.paper.configuration.type.number.IntOr.Disabled pageMax = io.papermc.paper.configuration.GlobalConfiguration.get().itemValidation.bookSize.pageMax;
         if (!this.cserver.isPrimaryThread() && pageMax.enabled()) {
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 0a808c5d242b2d9bea82d9d219227fbaf5741bf4..7d66126c1f5957c109a2426d53f5d0072886309b 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 d46f952e5e425eb90f8c435276bfc4542e85f6a7..d180ea6099d8fed3cf19f0f32bbfced7df57c9d7 100644
--- a/src/main/java/org/galemc/gale/configuration/GaleGlobalConfiguration.java
+++ b/src/main/java/org/galemc/gale/configuration/GaleGlobalConfiguration.java
@@ -35,4 +35,10 @@ public class GaleGlobalConfiguration extends ConfigurationPart {
 
     }
 
+    public GameplayMechanics gameplayMechanics;
+    public class GameplayMechanics extends ConfigurationPart {
+
+        public boolean enableBookWriting = true; // Gale - Pufferfish - make book writing configurable
+
+    }
 }