PaperMC/patches/server/0615-prevent-unintended-light-block-manipulation.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Jake Potrebic <jake.m.potrebic@gmail.com>
Date: Mon, 13 Sep 2021 18:55:45 -0700
Subject: [PATCH] prevent unintended light block manipulation


diff --git a/src/main/java/net/minecraft/world/level/block/LightBlock.java b/src/main/java/net/minecraft/world/level/block/LightBlock.java
index 6c3ca57a29d3c5ad1add1cf2f707b930dfc422ea..fec6bf38f080039436ba80d5528857ba4787bf4e 100644
--- a/src/main/java/net/minecraft/world/level/block/LightBlock.java
+++ b/src/main/java/net/minecraft/world/level/block/LightBlock.java
@@ -50,6 +50,14 @@ public class LightBlock extends Block implements SimpleWaterloggedBlock {
         builder.add(LEVEL, WATERLOGGED);
     }
 
+    // Paper start - prevent unintended light block manipulation
+    @Override
+    protected InteractionResult useItemOn(ItemStack stack, BlockState state, Level world, BlockPos pos, Player player, net.minecraft.world.InteractionHand hand, BlockHitResult hit) {
+        if (player.getItemInHand(hand).getItem() != Items.LIGHT || (world instanceof final net.minecraft.server.level.ServerLevel serverLevel && !player.mayInteract(serverLevel, pos)) || !player.mayUseItemAt(pos, hit.getDirection(), player.getItemInHand(hand))) { return net.minecraft.world.InteractionResult.PASS; } // Paper - Prevent unintended light block manipulation
+        return super.useItemOn(stack, state, world, pos, player, hand, hit);
+    }
+    // Paper end - prevent unintended light block manipulation
+
     @Override
     protected InteractionResult useWithoutItem(BlockState state, Level world, BlockPos pos, Player player, BlockHitResult hit) {
         if (!world.isClientSide && player.canUseGameMasterBlocks()) {