CommandManager.registerCommand("test", function (ev) {
// ev - CmdEventsArgs
// ev.getSender() - returns a CommandSender
// ev.getCommand() - returns command name
// ev.getArgs() - returns an arguments String[]
  ev.getSender().sendMessage("Hello world!");
  // unregister command: CommandManager.unregisterCommand("test");
});

var a =
function (ev) {
  var Player = ev.getPlayer();
  if(ev.getMessage().equalsIgnoreCase("hello")) Server.broadcastMessage("Hello, " + Player.getName() + "!");
};
EventManager.on("PlayerChatEvent", a);
// remove all listeners for an event: EventManager.removeAllListeners("PlayerChatEvent");
// remove a listener: EventManager.removeListener("PlayerChatEvent", a);

var HoldingEntities = new HashMap();
EventManager.on("Loop", function (n) {
    //Server.broadcastMessage("loop");
    HoldingEntities.keySet().forEach(function (p) {
        HoldingEntities.get(p).teleport(Server.getPlayer(p).getTargetBlock(null, 3).getLocation());
    });
});
CommandManager.registerCommand("gravitygun", function(e) {
    var Player = Server.getPlayer(e.getSender().getName());
    if(Player == null) {
        e.getSender().sendMessage("You must be a player to do that.");
        return;
    }
    var si = EventManager.createScriptedItem(Material.STICK, Player);
    var im = si.item.getItemMeta();
    im.setDisplayName("§6§lGravityGun");
    si.item.setItemMeta(im);
    si.item.addUnsafeEnchantment(Enchantment.DURABILITY, 10);
    EventManager.__items.add(si);
    Player.getInventory().addItem(si.item);
    EventManager.on(si.id + "InteractEntity", function (ev) {
        //ev.player.sendMessage("interact entity");
        if(ev.event.getHand() != "HAND") return;
        //if(!ev.player.isSneaking()) return;
        var entity = ev.event.getRightClicked();
   
        HoldingEntities.put(ev.player.getName(), entity);
        entity.setGravity(false);
        //ev.player.sendMessage("grabbed entity");
    });
    EventManager.on(si.id + "Interact", function (ev) {
            //ev.player.sendMessage("interact");
        if(ev.event.getAction() != "RIGHT_CLICK_AIR" && ev.event.getAction() != "RIGHT_CLICK_BLOCK") return;
        if(!ev.player.isSneaking()) return;
        if(HoldingEntities.containsKey(ev.player.getName())) {
        //    ev.player.sendMessage("released entity");
            HoldingEntities.get(ev.player.getName()).setGravity(true);
            HoldingEntities.remove(ev.player.getName());
            return;
        }
   
    });
});