Add some more sanity checks to cut down on database query spam

gradle.properties

@@ -53,7 +53,7 @@ mod_name=Zontreck's Library Mod
 # The license of the mod. Review your options at https://choosealicense.com/. All Rights Reserved is the default.
 mod_license=GPLv3
 # The mod version. See https://semver.org/
-mod_version=1201.13.042524.0151
+mod_version=1201.13.042524.0215
 # The group ID for the mod. It is only important when publishing as an artifact to a Maven repository.
 # This should match the base package used for the mod sources.
 # See https://maven.apache.org/guides/mini/guide-naming-conventions.html

src/main/java/dev/zontreck/libzontreck/memory/world/BlockRestoreQueue.java

@@ -25,6 +25,11 @@ public abstract class BlockRestoreQueue
     private final BlockRestoreRunner RUNNER;
     private ScheduledFuture<?> RUNNING_TASK;
 
+    /**
+     * When in database mode, this flag will be checked by the Restore Runner so a database call is not made unnecessarily.
+     */
+    private boolean hasBlocks = true;
+
     public BlockRestoreQueue()
     {
         RUNNER = new BlockRestoreRunner(this);
@@ -74,6 +79,7 @@ public abstract class BlockRestoreQueue
         {
             databaseUpdate(block);
             notifyDirtyQueue(true);
+            hasBlocks=true;
             return;
         }
         BLOCK_QUEUE.add(block);
@@ -178,6 +184,16 @@ public abstract class BlockRestoreQueue
      */
     public abstract boolean sorted();
 
+    /**
+     * Whether the queue has blocks or not
+     * @return
+     */
+    public boolean hasBlocks()
+    {
+        if(usesDatabase()) return hasBlocks;
+        else return getQueuedBlocks() != 0;
+    }
+
     /**
      * Clears the entire queue, discarding the saved blocks permanently.
      */

src/main/java/dev/zontreck/libzontreck/memory/world/BlockRestoreRunner.java

@@ -25,6 +25,9 @@ public class BlockRestoreRunner implements Runnable
     public void run() {
         if(queue.getQueuedBlocks() == 0 && !queue.usesDatabase()) return; // We'll be queued back up later
 
+        if(!queue.hasBlocks())
+            return;
+
         PrimitiveBlock prim = queue.getNextBlock();
         if(prim == null)return; // No more blocks.