From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Jake Potrebic <jake.m.potrebic@gmail.com>
Date: Sun, 20 Dec 2020 16:41:44 -0800
Subject: [PATCH] Added WorldGameRuleChangeEvent


diff --git a/src/main/java/net/minecraft/server/commands/GameRuleCommand.java b/src/main/java/net/minecraft/server/commands/GameRuleCommand.java
index 87b968019fa10647522121c7b29094ed3e0dcf6d..7f124784dd7876cdb26f16e83deddf07dd9a198e 100644
--- a/src/main/java/net/minecraft/server/commands/GameRuleCommand.java
+++ b/src/main/java/net/minecraft/server/commands/GameRuleCommand.java
@@ -31,7 +31,7 @@ public class GameRuleCommand {
         CommandSourceStack commandlistenerwrapper = (CommandSourceStack) context.getSource();
         T t0 = commandlistenerwrapper.getLevel().getGameRules().getRule(key); // CraftBukkit
 
-        t0.setFromArgument(context, "value");
+        t0.setValue(context, "value", key); // Paper
         commandlistenerwrapper.sendSuccess(new TranslatableComponent("commands.gamerule.set", new Object[]{key.getId(), t0.toString()}), true);
         return t0.getCommandResult();
     }
diff --git a/src/main/java/net/minecraft/world/level/GameRules.java b/src/main/java/net/minecraft/world/level/GameRules.java
index 6c996d34ef34879db1d65c39adf99ce2d64e5499..1e6f299571a25729dbf8c5b0cd115c1e842a8a3c 100644
--- a/src/main/java/net/minecraft/world/level/GameRules.java
+++ b/src/main/java/net/minecraft/world/level/GameRules.java
@@ -25,6 +25,7 @@ import net.minecraft.server.MinecraftServer;
 import net.minecraft.server.level.ServerPlayer;
 import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
+import io.papermc.paper.event.world.WorldGameRuleChangeEvent; // Paper
 
 public class GameRules {
 
@@ -177,8 +178,11 @@ public class GameRules {
         }
 
         @Override
-        protected void updateFromArgument(CommandContext<CommandSourceStack> context, String name) {
-            this.value = BoolArgumentType.getBool(context, name);
+        protected void a(CommandContext<CommandSourceStack> commandcontext, String s, GameRules.Key<BooleanValue> gameRuleKey) { // Paper start
+            WorldGameRuleChangeEvent event = new WorldGameRuleChangeEvent(commandcontext.getSource().getBukkitWorld(), commandcontext.getSource().getBukkitSender(), (org.bukkit.GameRule<Boolean>) org.bukkit.GameRule.getByName(gameRuleKey.toString()), String.valueOf(BoolArgumentType.getBool(commandcontext, s)));
+            if (!event.callEvent()) return;
+            this.value = Boolean.parseBoolean(event.getValue());
+            // Paper end
         }
 
         public boolean get() {
@@ -237,8 +241,11 @@ public class GameRules {
         }
 
         @Override
-        protected void updateFromArgument(CommandContext<CommandSourceStack> context, String name) {
-            this.value = IntegerArgumentType.getInteger(context, name);
+        protected void a(CommandContext<CommandSourceStack> commandcontext, String s, GameRules.Key<IntegerValue> gameRuleKey) { // Paper start
+            WorldGameRuleChangeEvent event = new WorldGameRuleChangeEvent(commandcontext.getSource().getBukkitWorld(), commandcontext.getSource().getBukkitSender(), (org.bukkit.GameRule<Integer>) org.bukkit.GameRule.getByName(gameRuleKey.toString()), String.valueOf(IntegerArgumentType.getInteger(commandcontext, s)));
+            if (!event.callEvent()) return;
+            this.value = Integer.parseInt(event.getValue());
+            // Paper end
         }
 
         public int get() {
@@ -291,11 +298,13 @@ public class GameRules {
             this.type = type;
         }
 
-        protected abstract void updateFromArgument(CommandContext<CommandSourceStack> context, String name);
+        protected void updateValue(CommandContext<CommandSourceStack> commandcontext, String s, GameRules.Key<T> gameRuleKey) { this.a(commandcontext, s, gameRuleKey); } // Paper - OBFHELPER
+        protected abstract void a(CommandContext<CommandSourceStack> commandcontext, String s, GameRules.Key<T> gameRuleKey); // Paper
 
-        public void setFromArgument(CommandContext<CommandSourceStack> context, String name) {
-            this.updateFromArgument(context, name);
-            this.onChanged(((CommandSourceStack) context.getSource()).getServer());
+        public void setValue(CommandContext<CommandSourceStack> commandcontext, String s, GameRules.Key<T> gameRuleKey) { this.b(commandcontext, s, gameRuleKey); } // Paper - OBFHELPER
+        public void b(CommandContext<CommandSourceStack> commandcontext, String s, GameRules.Key<T> gameRuleKey) { // Paper
+            this.updateValue(commandcontext, s, gameRuleKey); // Paper
+            this.onChanged(((CommandSourceStack) commandcontext.getSource()).getServer());
         }
 
         public void onChanged(@Nullable MinecraftServer server) {
diff --git a/src/main/java/org/bukkit/craftbukkit/CraftWorld.java b/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
index aaf97c13babce3b0ffc639ef950d59d1eba1398a..f497b9e11a075a84ff0a2117eb79d0532e4a326f 100644
--- a/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
+++ b/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
@@ -2345,8 +2345,13 @@ public class CraftWorld implements World {
 
         if (!isGameRule(rule)) return false;
 
+        // Paper start
+        GameRule<?> gameRule = GameRule.getByName(rule);
+        io.papermc.paper.event.world.WorldGameRuleChangeEvent event = new io.papermc.paper.event.world.WorldGameRuleChangeEvent(this, null, gameRule, value);
+        if (!event.callEvent()) return false;
+        // Paper end
         GameRules.Value<?> handle = getHandle().getGameRules().getRule(getGameRulesNMS().get(rule));
-        handle.deserialize(value);
+        handle.deserialize(event.getValue().toString()); // Paper
         handle.onChanged(getHandle().getServer());
         return true;
     }
@@ -2381,8 +2386,12 @@ public class CraftWorld implements World {
 
         if (!isGameRule(rule.getName())) return false;
 
+        // Paper start
+        io.papermc.paper.event.world.WorldGameRuleChangeEvent event = new io.papermc.paper.event.world.WorldGameRuleChangeEvent(this, null, rule, String.valueOf(newValue));
+        if (!event.callEvent()) return false;
+        // Paper end
         GameRules.Value<?> handle = getHandle().getGameRules().getRule(getGameRulesNMS().get(rule.getName()));
-        handle.deserialize(newValue.toString());
+        handle.deserialize(event.getValue().toString()); // Paper
         handle.onChanged(getHandle().getServer());
         return true;
     }