Purpur/patches/server/0309-lightning-transforms-blocks.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: granny <granny@purpurmc.org>
Date: Sun, 27 Aug 2023 02:09:51 -0700
Subject: [PATCH] lightning transforms 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..6036a6fba66bec97ac46f2984356e2d1d6d94994 100644
--- a/src/main/java/net/minecraft/world/entity/LightningBolt.java
+++ b/src/main/java/net/minecraft/world/entity/LightningBolt.java
@@ -83,6 +83,51 @@ public class LightningBolt extends Entity {
 
     }
 
+    // Purpur start
+    private void transformBlocks() {
+        if (!level().purpurConfig.lightningTransformsBlocks) return;
+
+        BlockPos blockposition = this.getStrikePosition();
+        BlockState iblockdata = this.level().getBlockState(blockposition);
+        BlockPos blockposition2;
+        BlockState iblockdata2;
+
+        if (iblockdata.is(Blocks.LIGHTNING_ROD)) {
+            blockposition2 = blockposition.below();
+            iblockdata2 = this.level().getBlockState(blockposition2);
+        } else {
+            iblockdata2 = iblockdata;
+            blockposition2 = blockposition;
+        }
+
+        if (level().purpurConfig.lightningTurnsSandIntoGlass && iblockdata2.is(Blocks.SAND)) {
+            level().setBlock(blockposition2, Blocks.GLASS.defaultBlockState(), 2);
+        } else if (level().purpurConfig.lightningTurnsStoneIntoObsidian && iblockdata2.is(Blocks.STONE)) {
+            level().setBlock(blockposition2, Blocks.OBSIDIAN.defaultBlockState(), 2);
+        } else if (level().purpurConfig.lightningTurnsWaterIntoStone && iblockdata2.is(Blocks.WATER)) {
+            level().setBlock(blockposition2, Blocks.STONE.defaultBlockState(), 2);
+        } else if (!level().purpurConfig.lightningTurnsNearbySandIntoGlass) {
+            return;
+        }
+
+        org.bukkit.craftbukkit.util.BlockStateListPopulator blockList = new org.bukkit.craftbukkit.util.BlockStateListPopulator(level());
+        net.minecraft.world.level.block.SpongeBlock.removeBlocksBreadthFirstSearch(level(), blockposition2, level().purpurConfig.lightningTurnsNearbySandIntoGlassMaxDepth, level().purpurConfig.lightningTurnsNearbySandIntoGlassMaxIterations, blockList, (blockposition1) -> {
+            if (blockposition1.equals(blockposition2)) {
+                return true;
+            } else {
+                BlockState iblockdata3 = blockList.getBlockState(blockposition1);
+
+                if (!iblockdata3.is(Blocks.SAND)) { // Purpur
+                    return false;
+                } else {
+                    blockList.setBlock(blockposition1, Blocks.GLASS.defaultBlockState(), 3);
+                    return true;
+                }
+            }
+        });
+    }
+    // Purpur end
+
     @Override
     public void tick() {
         super.tick();
@@ -98,6 +143,7 @@ public class LightningBolt extends Entity {
                 }
 
                 this.powerLightningRod();
+                if (level().purpurConfig.lightningTransformsBlocks) this.transformBlocks(); // 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..bd1edc58a863673491a2935af4dc92996d1edb4c 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 +47,12 @@ 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
+    // Purpur start
+        return removeBlocksBreadthFirstSearch(world, pos, world.purpurConfig.spongeAbsorptionRadius, world.purpurConfig.spongeAbsorptionArea, new BlockStateListPopulator(world), null);
+    }
+    public static boolean removeBlocksBreadthFirstSearch(Level world, BlockPos pos, int maxDepth, int maxIterations, BlockStateListPopulator blockList, @org.jetbrains.annotations.Nullable java.util.function.Predicate<BlockPos> customCallback) {
+        BlockPos.breadthFirstTraversal(pos, maxDepth, maxIterations, (blockposition1, consumer) -> { // Purpur
+    // Purpur end
             Direction[] aenumdirection = SpongeBlock.ALL_DIRECTIONS;
             int i = aenumdirection.length;
 
@@ -58,7 +62,7 @@ public class SpongeBlock extends Block {
                 consumer.accept(blockposition1.relative(enumdirection));
             }
 
-        }, (blockposition1) -> {
+        }, customCallback == null ? (blockposition1) -> { // Purpur
             if (blockposition1.equals(pos)) {
                 return true;
             } else {
@@ -102,17 +106,19 @@ public class SpongeBlock extends Block {
                     return true;
                 }
             }
-        });
+        } : customCallback); // Purpur
         // CraftBukkit start
         List<CraftBlockState> blocks = blockList.getList(); // Is a clone
         if (!blocks.isEmpty()) {
             final org.bukkit.block.Block bblock = world.getWorld().getBlockAt(pos.getX(), pos.getY(), pos.getZ());
 
+            if (customCallback != null) { // Purpur - TODO: custom event that extends spongeabsorbevent?? or use a pre-existing block event? or leave it as is..
             SpongeAbsorbEvent event = new SpongeAbsorbEvent(bblock, (List<org.bukkit.block.BlockState>) (List) blocks);
             world.getCraftServer().getPluginManager().callEvent(event);
 
             if (event.isCancelled()) {
                 return false;
+            } // Purpur
             }
 
             for (CraftBlockState block : blocks) {
diff --git a/src/main/java/org/purpurmc/purpur/PurpurWorldConfig.java b/src/main/java/org/purpurmc/purpur/PurpurWorldConfig.java
index 078102e636803f38facc049952813ff2f8b63594..36ec3a3d830aab562bfe9e8d657fa3232360f0cb 100644
--- a/src/main/java/org/purpurmc/purpur/PurpurWorldConfig.java
+++ b/src/main/java/org/purpurmc/purpur/PurpurWorldConfig.java
@@ -145,6 +145,13 @@ public class PurpurWorldConfig {
     public boolean rainStopsAfterSleep = true;
     public boolean thunderStopsAfterSleep = true;
     public int mobLastHurtByPlayerTime = 100;
+    public boolean lightningTransformsBlocks = false;
+    public boolean lightningTurnsNearbySandIntoGlass = true;
+    public int lightningTurnsNearbySandIntoGlassMaxDepth = 3;
+    public int lightningTurnsNearbySandIntoGlassMaxIterations = 6;
+    public boolean lightningTurnsSandIntoGlass = true;
+    public boolean lightningTurnsWaterIntoStone = true;
+    public boolean lightningTurnsStoneIntoObsidian = true;
     private void miscGameplayMechanicsSettings() {
         useBetterMending = getBoolean("gameplay-mechanics.use-better-mending", useBetterMending);
         mendingMultiplier = getDouble("gameplay-mechanics.mending-multiplier", mendingMultiplier);
@@ -173,6 +180,13 @@ public class PurpurWorldConfig {
         rainStopsAfterSleep = getBoolean("gameplay-mechanics.rain-stops-after-sleep", rainStopsAfterSleep);
         thunderStopsAfterSleep = getBoolean("gameplay-mechanics.thunder-stops-after-sleep", thunderStopsAfterSleep);
         mobLastHurtByPlayerTime = getInt("gameplay-mechanics.mob-last-hurt-by-player-time", mobLastHurtByPlayerTime);
+        lightningTransformsBlocks = getBoolean("gameplay-mechanics.lightning-transforms-blocks.enabled", lightningTransformsBlocks);
+        lightningTurnsNearbySandIntoGlass = getBoolean("gameplay-mechanics.lightning-transforms-blocks.nearby-sand-into-glass.enabled", lightningTurnsNearbySandIntoGlass);
+        lightningTurnsNearbySandIntoGlassMaxDepth = getInt("gameplay-mechanics.lightning-transforms-blocks.nearby-sand-into-glass.max-depth", lightningTurnsNearbySandIntoGlassMaxDepth);
+        lightningTurnsNearbySandIntoGlassMaxIterations = getInt("gameplay-mechanics.lightning-transforms-blocks.nearby-sand-into-glass.max-iteration", lightningTurnsNearbySandIntoGlassMaxIterations);
+        lightningTurnsSandIntoGlass = getBoolean("gameplay-mechanics.lightning-transforms-blocks.sand-into-glass", lightningTurnsSandIntoGlass);
+        lightningTurnsWaterIntoStone = getBoolean("gameplay-mechanics.lightning-transforms-blocks.water-into-stone", lightningTurnsWaterIntoStone);
+        lightningTurnsStoneIntoObsidian = getBoolean("gameplay-mechanics.lightning-transforms-blocks.stone-into-obsidian", lightningTurnsStoneIntoObsidian);
     }
 
     public int daytimeTicks = 12000;