30 minute mine windows

src/engine/objects/Mine.java

@@ -311,8 +311,13 @@ public class Mine extends AbstractGameObject {
             mineOpenTime = LocalDateTime.now().withHour(mine.liveTime).withMinute(30).withSecond(0).withNano(0);
         }
 
-        writer.putLocalDateTime(mineOpenTime);
+        if(LocalDateTime.now().isAfter(mineOpenTime.plusMinutes(30))){
-        writer.putLocalDateTime(mineOpenTime.plusMinutes(30));
+            writer.putLocalDateTime(mineOpenTime.plusDays(1));
+            writer.putLocalDateTime(mineOpenTime.plusMinutes(30).plusDays(1));
+        } else {
+            writer.putLocalDateTime(mineOpenTime);
+            writer.putLocalDateTime(mineOpenTime.plusMinutes(30));
+        }
         writer.put(mine.isActive ? (byte) 0x01 : (byte) 0x00);
 
         Building mineTower = BuildingManager.getBuilding(mine.buildingID);