Add a sanity check for migrations, only execute when migration is newer than current table

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=1201.13.042324.2345
+mod_version=1201.13.042424.0010
 # 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/DatabaseMigrations.java

@@ -1,6 +1,7 @@
 package dev.zontreck.libzontreck.memory.world;
 
 import com.google.common.collect.Lists;
+import dev.zontreck.libzontreck.LibZontreck;
 import dev.zontreck.libzontreck.events.RegisterMigrationsEvent;
 import net.minecraftforge.common.MinecraftForge;
 
@@ -133,9 +134,52 @@ public class DatabaseMigrations
 
         List<Migration> migration = Lists.reverse(migrations);
 
+        Migration lastTableChecked = null;
         for(Migration m : migration)
         {
+            if(lastTableChecked == null) lastTableChecked = getCurrentTable(m.tableID);
+            else {
+                if(lastTableChecked.tableID != m.tableID) lastTableChecked = getCurrentTable(m.tableID);
+            }
+
+            if(m.version > lastTableChecked.version) {
+
+                LibZontreck.LOGGER.info("Executing migration " + m.tableID + ":" + m.version);
                 m.execute();
+            } else {
+                LibZontreck.LOGGER.info("Skipping migration on table " + m.tableID + "; Current table version is " + lastTableChecked.version);
+            }
+        }
+    }
+
+    /**
+     * Gets the current table's version using the Migration structure for data fields. Will be null if there is an error on any table except for migrations.
+     * @return
+     */
+    private static Migration getCurrentTable(String tableID)
+    {
+        try{
+            PreparedStatement pst = DatabaseWrapper.get().prepareStatement("SELECT * FROM `migrations` WHERE tableID=?;");
+            pst.setString(0, tableID);
+
+            var result = pst.executeQuery();
+            if(!result.next())
+            {
+                return builder().withTableID(tableID).withVersion(0);
+            }else {
+                return builder().withTableID(tableID).withVersion(result.getInt("version"));
+            }
+
+        }catch (SQLException ex)
+        {
+            if(tableID == "migrations")
+            {
+                return builder().withTableID(tableID)
+                        .withVersion(0);
+            }
+            ex.printStackTrace();
+
+            return null;
         }
     }