Reinstate the generated chunk tracker.

This might hopefully resolve the issue #312.

src/main/java/noobanidus/mods/lootr/block/entities/TileTicker.java

@@ -19,6 +19,7 @@
 import noobanidus.mods.lootr.api.LootrAPI;
 import noobanidus.mods.lootr.api.blockentity.ILootBlockEntity;
 import noobanidus.mods.lootr.config.ConfigManager;
+import noobanidus.mods.lootr.event.HandleChunk;
 
 import java.util.Set;
 
@@ -107,14 +108,24 @@ public static void serverTick(TickEvent.ServerTickEvent event) {
           continue;
         }
 
-
         boolean skip = false;
         for (ChunkPos chunkPos : entry.getChunkPositions()) {
           if (!level.getChunkSource().hasChunk(chunkPos.x, chunkPos.z)) {
             skip = true;
             break;
           }
         }
+        synchronized (HandleChunk.LOADED_CHUNKS) {
+          Set<ChunkPos> loadedChunks = HandleChunk.LOADED_CHUNKS.get(entry.dimension);
+          if (loadedChunks != null) {
+            for (ChunkPos chunkPos : entry.getChunkPositions()) {
+              if (!loadedChunks.contains(chunkPos)) {
+                skip = true;
+                break;
+              }
+            }
+          }
+        }
         if (skip) {
           continue;
         }

src/main/java/noobanidus/mods/lootr/event/HandleChunk.java

@@ -0,0 +1,49 @@
+package noobanidus.mods.lootr.event;
+
+import it.unimi.dsi.fastutil.objects.Object2ObjectLinkedOpenHashMap;
+import it.unimi.dsi.fastutil.objects.ObjectLinkedOpenHashSet;
+import net.minecraft.resources.ResourceKey;
+import net.minecraft.world.level.ChunkPos;
+import net.minecraft.world.level.Level;
+import net.minecraft.world.level.chunk.ChunkAccess;
+import net.minecraft.world.level.chunk.ChunkStatus;
+import net.minecraft.world.level.chunk.LevelChunk;
+import net.minecraftforge.event.level.ChunkEvent;
+import net.minecraftforge.event.server.*;
+import net.minecraftforge.eventbus.api.SubscribeEvent;
+import net.minecraftforge.fml.common.Mod;
+import noobanidus.mods.lootr.api.LootrAPI;
+
+import java.util.*;
+
+@Mod.EventBusSubscriber(modid = LootrAPI.MODID)
+public class HandleChunk {
+  public static final Map<ResourceKey<Level>, Set<ChunkPos>> LOADED_CHUNKS = Collections.synchronizedMap(new Object2ObjectLinkedOpenHashMap<>());
+
+  @SubscribeEvent
+  public static void onChunkLoad(ChunkEvent.Load event) {
+    if (!event.getLevel().isClientSide()) {
+      ChunkAccess chunk = event.getChunk();
+      if (chunk.getStatus().isOrAfter(ChunkStatus.FULL) && chunk instanceof LevelChunk lChunk) {
+        synchronized (LOADED_CHUNKS) {
+          Set<ChunkPos> chunkSet = LOADED_CHUNKS.computeIfAbsent(lChunk.getLevel().dimension(), k -> Collections.synchronizedSet(new ObjectLinkedOpenHashSet<>()));
+          chunkSet.add(chunk.getPos());
+        }
+      }
+    }
+  }
+
+  @SubscribeEvent
+  public static void onServerStarted(ServerAboutToStartEvent event) {
+    synchronized (LOADED_CHUNKS) {
+      LOADED_CHUNKS.clear();
+    }
+  }
+
+  @SubscribeEvent
+  public static void onServerStopped(ServerStoppedEvent event) {
+    synchronized (LOADED_CHUNKS) {
+      LOADED_CHUNKS.clear();
+    }
+  }
+}