# This script makes a door open when a player enters a trigger.

using { /Fortnite.com/Devices }
using { /Verse.org/Simulation }
using { /UnrealEngine.com/Temporary/Diagnostics }

# This is our main device.
# It connects to the Prop Mover and the Trigger.
smart_door_device := class(creative_device):
    # These are the parts we will control.
    # We will set these in the editor later.
    @editable
    door_mover : prop_mover_device = prop_mover_device{}

    @editable
    player_trigger : trigger_device = trigger_device{}

    # We track whether the door is already open so we
    # do not try to open it again while a player is inside.
    var DoorIsOpen : logic = false

    # This function runs once when the game starts.
    OnBegin<override>()<suspends> : void =
        # Subscribe to the trigger's events.
        # AgentEntersEvent fires when a player walks in.
        # AgentExitsEvent fires when a player walks out.
        player_trigger.AgentEntersEvent.Subscribe(OnPlayerEnter)
        player_trigger.AgentExitsEvent.Subscribe(OnPlayerExit)

    # Called automatically when a player enters the trigger.
    OnPlayerEnter(Agent : agent) : void =
        if (not DoorIsOpen?):
            # If the door is closed, open it.
            set DoorIsOpen = true
            door_mover.MoveToEnd()

    # Called automatically when a player exits the trigger.
    OnPlayerExit(Agent : agent) : void =
        if (DoorIsOpen?):
            # If the door is open, close it.
            set DoorIsOpen = false
            door_mover.MoveToBegin()