From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: granny <granny@purpurmc.org>
Date: Sun, 27 Aug 2023 02:08:38 -0700
Subject: [PATCH] lightning affects blocks


diff --git a/src/main/java/net/minecraft/world/entity/LightningBolt.java b/src/main/java/net/minecraft/world/entity/LightningBolt.java
index a01a8ba27534d2b0d544423bc2c48fd29d0a6d64..977cb69f8ada7459a9d2308ef07e445706f243f6 100644
--- a/src/main/java/net/minecraft/world/entity/LightningBolt.java
+++ b/src/main/java/net/minecraft/world/entity/LightningBolt.java
@@ -83,6 +83,46 @@ public class LightningBolt extends Entity {
 
     }
 
+    private void transformSandToGlass() {
+        BlockPos blockposition = this.getStrikePosition();
+        BlockState iblockdata = this.level().getBlockState(blockposition);
+
+        if (iblockdata.is(Blocks.LIGHTNING_ROD)) {
+            blockposition = blockposition.below();
+            iblockdata = this.level().getBlockState(blockposition);
+        }
+
+        if (iblockdata.is(Blocks.SAND)) {
+            level().setBlock(blockposition, Blocks.GLASS.defaultBlockState(), 2);
+        } else if (iblockdata.is(Blocks.STONE)) {
+            level().setBlock(blockposition, Blocks.OBSIDIAN.defaultBlockState(), 2);
+        } else if (iblockdata.is(Blocks.WATER)) {
+            level().setBlock(blockposition, Blocks.STONE.defaultBlockState(), 2);
+        } else {
+            return;
+        }
+
+        final BlockPos finalBlockposition = blockposition;
+        org.bukkit.craftbukkit.util.BlockStateListPopulator blockList = new org.bukkit.craftbukkit.util.BlockStateListPopulator(level());
+        net.minecraft.world.level.block.SpongeBlock.removeBlockBreadthFirstSearch(level(), blockposition, 3, 6, (blockposition1) -> {
+            if (blockposition1.equals(finalBlockposition)) {
+                return true;
+            } else {
+                BlockState iblockdata2 = blockList.getBlockState(blockposition1);
+                net.minecraft.world.level.material.FluidState fluid = blockList.getFluidState(blockposition1);
+
+                if (!iblockdata2.is(Blocks.SAND) && !iblockdata2.is(Blocks.STONE) && !fluid.is(net.minecraft.tags.FluidTags.WATER)) { // Purpur
+                    return false;
+                } else {
+                    if (iblockdata2.is(Blocks.SAND)) {
+                        blockList.setBlock(blockposition1, Blocks.GLASS.defaultBlockState(), 3);
+                    }
+                    return true;
+                }
+            }
+        }, blockList);
+    }
+
     @Override
     public void tick() {
         super.tick();
@@ -98,6 +138,7 @@ public class LightningBolt extends Entity {
                 }
 
                 this.powerLightningRod();
+                this.transformSandToGlass(); // Purpur
                 LightningBolt.clearCopperOnLightningStrike(this.level(), this.getStrikePosition(), this); // Paper - transmit LightningBolt instance to call EntityChangeBlockEvent
                 this.gameEvent(GameEvent.LIGHTNING_STRIKE);
             }
diff --git a/src/main/java/net/minecraft/world/level/block/SpongeBlock.java b/src/main/java/net/minecraft/world/level/block/SpongeBlock.java
index 2276fed1feb4fea59b5bd49b5e4586d49478b3cc..a65abad0dbf08e16a8e00b3c9657687a051c1e18 100644
--- a/src/main/java/net/minecraft/world/level/block/SpongeBlock.java
+++ b/src/main/java/net/minecraft/world/level/block/SpongeBlock.java
@@ -47,8 +47,11 @@ public class SpongeBlock extends Block {
     }
 
     private boolean removeWaterBreadthFirstSearch(Level world, BlockPos pos) {
-        BlockStateListPopulator blockList = new BlockStateListPopulator(world); // CraftBukkit - Use BlockStateListPopulator
-        BlockPos.breadthFirstTraversal(pos, world.purpurConfig.spongeAbsorptionRadius, world.purpurConfig.spongeAbsorptionArea, (blockposition1, consumer) -> { // Purpur
+        return removeBlockBreadthFirstSearch(world, pos, world.purpurConfig.spongeAbsorptionRadius, world.purpurConfig.spongeAbsorptionArea, null, new BlockStateListPopulator(world));
+    }
+    public static boolean removeBlockBreadthFirstSearch(Level world, BlockPos pos, int maxDepth, int maxIterations, java.util.function.Predicate<BlockPos> callback, BlockStateListPopulator blockList) {
+        // BlockStateListPopulator blockList = new BlockStateListPopulator(world); // CraftBukkit - Use BlockStateListPopulator
+        BlockPos.breadthFirstTraversal(pos, maxDepth, maxIterations, (blockposition1, consumer) -> { // Purpur
             Direction[] aenumdirection = SpongeBlock.ALL_DIRECTIONS;
             int i = aenumdirection.length;
 
@@ -58,7 +61,7 @@ public class SpongeBlock extends Block {
                 consumer.accept(blockposition1.relative(enumdirection));
             }
 
-        }, (blockposition1) -> {
+        }, callback == null ? (blockposition1) -> { // Purpur
             if (blockposition1.equals(pos)) {
                 return true;
             } else {
@@ -102,7 +105,7 @@ public class SpongeBlock extends Block {
                     return true;
                 }
             }
-        });
+        } : callback); // Purpur
         // CraftBukkit start
         List<CraftBlockState> blocks = blockList.getList(); // Is a clone
         if (!blocks.isEmpty()) {