From 1d134f3bb2133560de4c6d5f4e4d1afa7768a373 Mon Sep 17 00:00:00 2001
From: Bixilon <bixilon@bixilon.de>
Date: Mon, 26 Sep 2022 21:30:27 +0200
Subject: [PATCH] chunk: clear blocks section data if only null elements

---
 src/main/java/de/bixilon/minosoft/util/KUtil.kt     | 13 +++++++++++++
 .../de/bixilon/minosoft/util/chunk/ChunkUtil.kt     |  5 ++++-
 2 files changed, 17 insertions(+), 1 deletion(-)

diff --git a/src/main/java/de/bixilon/minosoft/util/KUtil.kt b/src/main/java/de/bixilon/minosoft/util/KUtil.kt
index 55af632b5..20889cbe0 100644
--- a/src/main/java/de/bixilon/minosoft/util/KUtil.kt
+++ b/src/main/java/de/bixilon/minosoft/util/KUtil.kt
@@ -307,6 +307,7 @@ object KUtil {
         }
     }
 
+    @Deprecated("Kutil 1.16")
     inline fun <T> Array<T>.trySet(index: Int, value: T): Boolean {
         if (index < 0 || index >= size) {
             return false
@@ -315,6 +316,7 @@ object KUtil {
         return true
     }
 
+    @Deprecated("Kutil 1.16")
     inline fun BooleanArray.trySet(index: Int, value: Boolean): Boolean {
         if (index < 0 || index >= size) {
             return false
@@ -323,10 +325,21 @@ object KUtil {
         return true
     }
 
+    @Deprecated("Kutil 1.16")
     inline fun IntArray.getOrElse(index: Int, `else`: Int): Int {
         if (index < 0 || index >= this.size) {
             return `else`
         }
         return this[index]
     }
+
+    @Deprecated("Kutil 1.16")
+    fun <T> Array<T?>.isEmptyOrOnlyNull(): Boolean {
+        for (entry in this) {
+            if (entry != null) {
+                return false
+            }
+        }
+        return true
+    }
 }
diff --git a/src/main/java/de/bixilon/minosoft/util/chunk/ChunkUtil.kt b/src/main/java/de/bixilon/minosoft/util/chunk/ChunkUtil.kt
index 2ef0407e3..38793d5e7 100644
--- a/src/main/java/de/bixilon/minosoft/util/chunk/ChunkUtil.kt
+++ b/src/main/java/de/bixilon/minosoft/util/chunk/ChunkUtil.kt
@@ -39,6 +39,7 @@ import de.bixilon.minosoft.protocol.protocol.ProtocolVersions.V_18W43A
 import de.bixilon.minosoft.protocol.protocol.ProtocolVersions.V_19W36A
 import de.bixilon.minosoft.protocol.protocol.ProtocolVersions.V_1_13_2
 import de.bixilon.minosoft.protocol.protocol.ProtocolVersions.V_21W37A
+import de.bixilon.minosoft.util.KUtil.isEmptyOrOnlyNull
 import java.lang.StrictMath.abs
 import java.util.*
 
@@ -203,7 +204,9 @@ object ChunkUtil {
             }
         }
 
-        chunkData.blocks = sectionBlocks
+        if (!sectionBlocks.isEmptyOrOnlyNull()) {
+            chunkData.blocks = sectionBlocks
+        }
         if (lightReceived > 0) {
             chunkData.light = light
         }