Paper/patches/server/0871-Call-BlockRedstoneEvents-properly.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Warrior <50800980+Warriorrrr@users.noreply.github.com>
Date: Wed, 13 Sep 2023 05:46:10 +0200
Subject: [PATCH] Call BlockRedstoneEvents properly

Call BlockRedstoneEvents for lecterns.
Fix previous power level for experimental redstone wire.

diff --git a/src/main/java/net/minecraft/world/level/block/LecternBlock.java b/src/main/java/net/minecraft/world/level/block/LecternBlock.java
index 44d322d26187bd7528799069d0e08dbf571a57f3..2864d0dec66980736f7434bff3031c05cff64592 100644
--- a/src/main/java/net/minecraft/world/level/block/LecternBlock.java
+++ b/src/main/java/net/minecraft/world/level/block/LecternBlock.java
@@ -180,6 +180,16 @@ public class LecternBlock extends BaseEntityBlock {
     }
 
     private static void changePowered(Level world, BlockPos pos, BlockState state, boolean powered) {
+        // Paper start - Call BlockRedstoneEvent properly
+        final int currentRedstoneLevel = state.getValue(LecternBlock.POWERED) ? 15 : 0, targetRedstoneLevel = powered ? 15 : 0;
+        if (currentRedstoneLevel != targetRedstoneLevel) {
+            final org.bukkit.event.block.BlockRedstoneEvent event = org.bukkit.craftbukkit.event.CraftEventFactory.callRedstoneChange(world, pos, currentRedstoneLevel, targetRedstoneLevel);
+
+            if (event.getNewCurrent() != targetRedstoneLevel) {
+                return;
+            }
+        }
+        // Paper end - Call BlockRedstoneEvent properly
         world.setBlock(pos, (BlockState) state.setValue(LecternBlock.POWERED, powered), 3);
         LecternBlock.updateBelow(world, pos, state);
     }
diff --git a/src/main/java/net/minecraft/world/level/redstone/ExperimentalRedstoneWireEvaluator.java b/src/main/java/net/minecraft/world/level/redstone/ExperimentalRedstoneWireEvaluator.java
index 28e0ff0a6fef63a572782704d34c4ccefc7baec1..bad91f7e9ebcf9d73f2d74a65e5235ee496e844e 100644
--- a/src/main/java/net/minecraft/world/level/redstone/ExperimentalRedstoneWireEvaluator.java
+++ b/src/main/java/net/minecraft/world/level/redstone/ExperimentalRedstoneWireEvaluator.java
@@ -46,7 +46,7 @@ public class ExperimentalRedstoneWireEvaluator extends RedstoneWireEvaluator {
             BlockState iblockdata1 = world.getBlockState(blockposition1);
 
             // CraftBukkit start
-            int oldPower = state.getValue(RedStoneWireBlock.POWER);
+            int oldPower = iblockdata1.getValue(RedStoneWireBlock.POWER); // Paper - Call BlockRedstoneEvent properly; get the previous power from the right state
             if (oldPower != j) {
                 BlockRedstoneEvent event = new BlockRedstoneEvent(CraftBlock.at(world, blockposition1), oldPower, j);
                 world.getCraftServer().getPluginManager().callEvent(event);