Paper/nms-patches/BlockRedstoneTorch.patch

--- a/net/minecraft/server/BlockRedstoneTorch.java
+++ b/net/minecraft/server/BlockRedstoneTorch.java
@@ -7,6 +7,8 @@
 import java.util.Random;
 import javax.annotation.Nullable;
 
+import org.bukkit.event.block.BlockRedstoneEvent; // CraftBukkit
+
 public class BlockRedstoneTorch extends BlockTorch {
 
     private static final Map<World, List<BlockRedstoneTorch.RedstoneUpdateInfo>> g = Maps.newHashMap();
@@ -14,7 +16,7 @@
 
     private boolean a(World world, BlockPosition blockposition, boolean flag) {
         if (!BlockRedstoneTorch.g.containsKey(world)) {
-            BlockRedstoneTorch.g.put(world, Lists.newArrayList());
+            BlockRedstoneTorch.g.put(world, Lists.<BlockRedstoneTorch.RedstoneUpdateInfo>newArrayList()); // CraftBukkit - fix decompile error
         }
 
         List list = (List) BlockRedstoneTorch.g.get(world);
@@ -97,8 +99,25 @@
             list.remove(0);
         }
 
+        // CraftBukkit start
+        org.bukkit.plugin.PluginManager manager = world.getServer().getPluginManager();
+        org.bukkit.block.Block block = world.getWorld().getBlockAt(blockposition.getX(), blockposition.getY(), blockposition.getZ());
+        int oldCurrent = this.isOn ? 15 : 0;
+
+        BlockRedstoneEvent event = new BlockRedstoneEvent(block, oldCurrent, oldCurrent);
+        // CraftBukkit end
+
         if (this.isOn) {
             if (flag) {
+                // CraftBukkit start
+                if (oldCurrent != 0) {
+                    event.setNewCurrent(0);
+                    manager.callEvent(event);
+                    if (event.getNewCurrent() != 0) {
+                        return;
+                    }
+                }
+                // CraftBukkit end
                 world.setTypeAndData(blockposition, Blocks.UNLIT_REDSTONE_TORCH.getBlockData().set(BlockRedstoneTorch.FACING, iblockdata.get(BlockRedstoneTorch.FACING)), 3);
                 if (this.a(world, blockposition, true)) {
                     world.a((EntityHuman) null, blockposition, SoundEffects.eR, SoundCategory.BLOCKS, 0.5F, 2.6F + (world.random.nextFloat() - world.random.nextFloat()) * 0.8F);
@@ -115,6 +134,15 @@
                 }
             }
         } else if (!flag && !this.a(world, blockposition, false)) {
+            // CraftBukkit start
+            if (oldCurrent != 15) {
+                event.setNewCurrent(15);
+                manager.callEvent(event);
+                if (event.getNewCurrent() != 15) {
+                    return;
+                }
+            }
+            // CraftBukkit end
             world.setTypeAndData(blockposition, Blocks.REDSTONE_TORCH.getBlockData().set(BlockRedstoneTorch.FACING, iblockdata.get(BlockRedstoneTorch.FACING)), 3);
         }