Check if player is standing in Lingering Potion

Hi,
I'm trying to make a plugin where when the player clicks a lingering potion is dropped and if the player is standing in the lingering potion, it will continue adding 1 integer to a number in a config. Here is what I have currently. I don't know to check to see if the player is standing in the potion or not.

Code:

                ThrownPotion potion = (ThrownPotion) player.getWorld().spawnEntity(player.getLocation(),
                        EntityType.LINGERING_POTION);

                Collection<PotionEffect> effects = potion.getEffects();
                effects.clear();

 

@plisov
- on InventoryClickEvent, check if the clicked item is a lingering potion then drop it.
- In the event PlayerPickUpItemEvent (something like this) , check if a player is near to a lingering potion.

 

@plisov
If you mean the circle effect from lingering potion, you can obtain by the following code:

Code:

Player player = event.getPlayer();

Collection<Entity> entities = event.getTo().getWorld().getNearbyEntities(player.getEyeLocation(), 0, -1, 0);

for(Entity ent : entities) {
    if(ent.getType() == EntityType.AREA_EFFECT_CLOUD) {
        player.sendMessage(ent.getType().name());
    }
}