From 6fc1a2b41153994c4886c620fdf6dd2ce12f7977 Mon Sep 17 00:00:00 2001
From: MrJeremyFisher <63616270+MrJeremyFisher@users.noreply.github.com>
Date: Wed, 28 Feb 2024 23:32:56 -0500
Subject: [PATCH] Prevent grass spread to reinforced dirt

---
 .../mc/citadel/listener/BlockListener.java      | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/plugins/citadel-paper/src/main/java/vg/civcraft/mc/citadel/listener/BlockListener.java b/plugins/citadel-paper/src/main/java/vg/civcraft/mc/citadel/listener/BlockListener.java
index f1f8a2cf4..b6ddff072 100644
--- a/plugins/citadel-paper/src/main/java/vg/civcraft/mc/citadel/listener/BlockListener.java
+++ b/plugins/citadel-paper/src/main/java/vg/civcraft/mc/citadel/listener/BlockListener.java
@@ -28,6 +28,7 @@ import org.bukkit.event.block.BlockDispenseEvent;
 import org.bukkit.event.block.BlockFertilizeEvent;
 import org.bukkit.event.block.BlockFromToEvent;
 import org.bukkit.event.block.BlockPlaceEvent;
+import org.bukkit.event.block.BlockSpreadEvent;
 import org.bukkit.event.entity.EntityChangeBlockEvent;
 import org.bukkit.event.player.PlayerBucketEmptyEvent;
 import org.bukkit.event.player.PlayerHarvestBlockEvent;
@@ -198,6 +199,22 @@ public class BlockListener implements Listener {
 		}
 	}
 
+	// prevent "enemy" grass spreading to reinforced dirt
+	@EventHandler(priority = EventPriority.LOW, ignoreCancelled = true)
+	public void onGrassSpread(BlockSpreadEvent event) {
+		if (event.getSource().getType() != Material.GRASS_BLOCK) return;
+
+		Reinforcement destRein = ReinforcementLogic.getReinforcementProtecting(event.getBlock());
+
+		if (destRein != null) {
+			Reinforcement sourceRein = ReinforcementLogic.getReinforcementProtecting(event.getSource());
+
+			if (sourceRein == null || sourceRein.getGroupId() != destRein.getGroupId()) {
+				event.setCancelled(true);
+			}
+		}
+	}
+
 	// prevent breaking reinforced blocks through plant growth
 	@EventHandler(priority = EventPriority.LOW, ignoreCancelled = true)
 	public void onStructureGrow(StructureGrowEvent event) {